JP7159026B2 - Injection molding machine - Google Patents

Description

The present invention relates to an injection molding machine.

The injection molding machine described in Patent Document 1 is a two-material molding machine, and includes a platen, a reversing table attached to the platen so as to be reversible, an ejector pin disposed in the reversing table so as to be able to move back and forth, and an ejector pin. and an ejector rod that advances and retracts the A mold main body is attached to the reversing table, and an ejector pin is disposed in the mold main body so as to move back and forth. The ejector rod waits behind the reversing table so as not to interfere with the reversing table when the reversing table is reversed. After reversing the reversing table, the ejector rod advances into the reversing table and advances the ejector pin. The ejector pin advances together with the ejector pin, and the secondary molded product is ejected from the mold main body. After reversing the reversing table, the free running distance of the ejector rod can be shortened by the length of the ejector pin when the ejector rod is advanced, and the molding cycle can be shortened.

Japanese Patent Application Laid-Open No. 2005-14430

The ejector pin of Patent Literature 1 is disposed in a reversing table so that it can move back and forth in order to shorten the molding cycle. The ejector pin turns over with the turning table. The ejector pin is also reversed together with the reversing table in the same manner as the ejector pin.

The positional relationship between the ejector pin and the ejector pin remains the same before and after the reversing table is reversed. Therefore, when the same ejector pin is advanced by the ejector rod before and after the reversing table is inverted, the same ejector pin advances.

The same ejector pin protrudes forward from the same portion of the mold main body before and after the reversing table is reversed. Therefore, it was impossible to change the object to be ejected from the mold main body before and after the reversing table was reversed.

One aspect of the present invention provides a technique capable of both shortening the molding cycle and changing the object to be protruded from the mold main body.

An injection molding machine according to one aspect of the present invention comprises:
a table on which the mold main body is attached;
a platen to which the table is rotatably and/or slidably mounted;
a table pin disposed inside the table and rotating with the table;
an ejector device that advances a movable part that is disposed inside the mold main body and ejects a molded product forward by the table pin in a direction in which the molded product is ejected,
The mold main body forms a first molding part that molds a first molded product, and a second molding part that molds a second molded product that includes the first molded product as a part,
The movable section has a first movable section and a second movable section,
The table pin has a first table pin that advances the first movable portion while the second movable portion is stopped, and a second table pin that advances the second movable portion,
The ejector device advances the first movable portion by the first table pin without advancing the second table pin in the first molding portion, and advances the first movable portion by the second table pin in the second molding portion. 2 Move the moving part forward.

According to one aspect of the present invention, it is possible to both shorten the molding cycle and change the object projected from the mold main body.

FIG. 1 is a diagram showing a state of an injection molding machine according to one embodiment when mold opening is completed. FIG. 2 is a diagram showing a state of the injection molding machine according to the embodiment at the time of mold clamping. FIG. 3 is a cross-sectional view showing the state of the mold apparatus during mold clamping when the rotation angle of the table according to the embodiment is 0°. FIG. 4 is a cross-sectional view showing the state of the mold apparatus when the table rotation angle is 0° and mold opening is completed according to the embodiment. FIG. 5 is a diagram showing the state of the mold apparatus during mold clamping when the rotation angle of the table is 180° according to one embodiment. FIG. 6 is a cross-sectional view showing the state of the mold apparatus when the table rotation angle is 180° and mold opening is completed according to the embodiment. 7 is an enlarged view of a part of FIG. 6. FIG. FIG. 8 is a diagram showing the state of the mold apparatus during mold clamping when the rotation angle of the table according to the first modification is 180°. FIG. 9 is a cross-sectional view showing the state of the mold apparatus when the table rotation angle is 180° and mold opening is completed according to the first modification. 10 is an enlarged view of a part of FIG. 9. FIG. FIG. 11 is a diagram showing the state of the mold apparatus during mold clamping when the rotation angle of the table according to the second modification is 180°. FIG. 12 is a cross-sectional view showing the state of the mold apparatus when the table rotation angle is 180° and mold opening is completed according to the second modification. 13 is an enlarged view of a part of FIG. 12. FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in each drawing, the same or corresponding configurations are denoted by the same or corresponding reference numerals, and description thereof may be omitted.

(Injection molding machine)
FIG. 1 is a diagram showing a state of an injection molding machine according to one embodiment when mold opening is completed. FIG. 2 is a diagram showing a state of the injection molding machine according to the embodiment at the time of mold clamping. FIG. 3 is a cross-sectional view showing the state of the mold apparatus during mold clamping when the rotation angle of the table according to the embodiment is 0°. FIG. 4 is a cross-sectional view showing the state of the mold apparatus when the table rotation angle is 0° and mold opening is completed according to the embodiment. FIG. 5 is a diagram showing the state of the mold apparatus during mold clamping when the rotation angle of the table is 180° according to one embodiment. FIG. 6 is a cross-sectional view showing the state of the mold apparatus when the table rotation angle is 180° and mold opening is completed according to the embodiment. 7 is an enlarged view of a part of FIG. 6. FIG. 1 and 2 are cross-sectional views taken along line II in FIG.

In this specification, the X-axis direction, Y-axis direction and Z-axis direction are directions perpendicular to each other. The X-axis direction and Y-axis direction represent the horizontal direction, and the Z-axis direction represents the vertical direction. When the mold clamping device 100 is of a horizontal type, the X-axis direction is the mold opening/closing direction, and the Y-axis direction is the width direction of the injection molding machine 10 . The Y-axis direction negative side is called the operating side, and the Y-axis direction positive side is called the non-operating side.

The injection molding machine 10 includes a mold clamping device 100, an ejector device 200, a first injection device 301, a second injection device 302, a first moving device 401, a second moving device (not shown), and a control device. 700 and a frame 900 . The frame 900 includes a mold clamping device frame 910 and an injection device frame 920 . The mold clamping device frame 910 and the injection device frame 920 are each installed on the floor 2 via leveling adjusters 930 . A control device 700 is arranged in the inner space of the injection device frame 920 . Each component of the injection molding machine 10 will be described below.

(mold clamping device)
In the description of the mold clamping device 100, the moving direction of the movable platen 120 when the mold is closed (for example, the X-axis positive direction) is defined as the front, and the moving direction of the movable platen 120 when the mold is opened is defined as the rear (for example, the X-axis negative direction). do.

The mold clamping device 100 performs mold closing, pressure increase, mold clamping, depressurization, and mold opening of the mold device 800 . Mold apparatus 800 includes a fixed mold 810 and a movable mold 820 .

The mold clamping device 100 is of a horizontal type, for example, and the mold opening/closing direction is horizontal. The mold clamping device 100 has a stationary platen 110 , a movable platen 120 , a table 520 , a rotating mechanism 530 and a moving mechanism 102 .

The fixed platen 110 is fixed with respect to the mold clamping device frame 910 . A stationary mold 810 is attached to the surface of the stationary platen 110 facing the movable platen 120 . The stationary mold 810 has a first stationary molding surface 811 and a second stationary molding surface 812 on the surface facing the movable mold 820, as shown in FIG.

The first stationary molding surface 811 forms a first molding portion 801 in which the first molded product 21 is molded. More specifically, the first stationary molding surface 811 forms part of the wall surface of the first molding portion 801 . The first molding portion 801 has a first cavity space 802 and a first communication space 803 communicating with the first cavity space 802 . The first communication space 803 is a so-called runner in this embodiment. When the first communication space 803 is a runner, the molten molding material flows through the first communication space 803 into the first cavity space 802 . After that, the molding material is cooled and solidified in both the first cavity space 802 and the first communication space 803 . The article molded in the first cavity space 802 is called the first cavity space molded product 22 . An article molded in the first communicating space 803 is called a first communicating space molded product 23 . The first molded product 21 includes a first cavity space molded product 22 and a first communicating space molded product 23 . Since the first communicating space 803 is a runner in this embodiment, the first communicating space molded product 23 is also called the first runner molded product 23 . The first runner molded product 23 is an unnecessary product and is discarded or reused as a recycled material.

The second fixed molding surface 812 forms a second molding portion 805 in which the second molding 25 is molded. More specifically, the second stationary mold surface 812 forms part of the wall surface of the second mold portion 805 . The second molding portion 805 has a second cavity space 806 and a second communication space 807 communicating with the second cavity space 806 . The second communication space 807 is a so-called runner in this embodiment. If the second communication space 807 is a runner, the molten molding material flows through the second communication space 807 into the second cavity space 806 . After that, the molding material is cooled and solidified in both the second cavity space 806 and the second communication space 807 . Articles molded in the second cavity space 806 are referred to as second cavity space molded products 26 . An article molded in the second communicating space 807 is called a second communicating space molded product 27 . The second molded product 25 includes a first cavity space molded product 22 and a second communicating space molded product 27 . Since the second communicating space 807 is a runner in this embodiment, the second communicating space molded product 27 is also called the second runner molded product 27 . The second runner molded product 27 is an unnecessary product and is discarded or reused as a recycled material.

The second molded product 25 partially includes the first molded product 21 . That is, part of the second molded product 25 is the first molded product 21 . For example, a portion of second cavity spatial molding 26 is first cavity spatial molding 22 . The first cavity space molded product 22 is the primary molded product, and the second cavity space molded product 26 is the secondary molded product. As will be described later, the first cavity molded product 22 may be a secondary molded product, and the second cavity molded product 26 may be a tertiary molded product. It is sufficient that the first cavity spatial molded product 22 is an n-order molded product (n is a natural number equal to or greater than 1), and the second cavity spatial molded product 26 is an n+1-order molded product. The n+1 order molded product partially includes the n order molded product.

The first stationary molding surface 811 and the second stationary molding surface 812 are formed in different shapes, such as concave shapes. The fixed mold 810 has a plurality of plates (not shown) stacked in the mold opening/closing direction. Among the plurality of plates forming the fixed mold 810, the plate that contacts the movable mold 820 is called a mold plate. The first stationary molding surface 811 and the second stationary molding surface 812 are formed on the same mold plate, but may be formed on different mold plates.

The movable platen 120 is arranged movably in the mold opening/closing direction with respect to the mold clamping device frame 910 . A guide 101 for guiding the movable platen 120 is laid on the mold clamping device frame 910 . A movable die 820 is attached via a table 520 to the surface of the movable platen 120 facing the stationary platen 110 .

The movable mold 820 has a first movable molding surface 821 and a second movable molding surface 822 on the surface facing the fixed mold 810 . As shown in FIG. 3, a first movable molding surface 821 forms a first molding portion 801 and a second movable molding surface 822 forms a second molding portion 805 . Also, as shown in FIG. 5, the first movable molding surface 821 forms the second molding portion 805 and the second movable molding surface 822 forms the first molding portion 801 . The first movable molding surface 821 and the second movable molding surface 822 respectively form the first molding portion 801 and the second molding portion 805 in turn. More specifically, the first movable molding surface 821 and the second movable molding surface 822 respectively form part of the wall surface of the first molding part 801 and part of the wall surface of the second molding part 805 in order. do.

The first movable molding surface 821 and the second movable molding surface 822 are formed in the same shape, and are each formed in a convex shape, for example. The movable mold 820 has a plurality of plates stacked in the mold opening/closing direction. Among the plurality of plates that constitute the movable mold 820, the plate that contacts the fixed mold 810 is called a template. The first movable molding surface 821 and the second movable molding surface 822 are formed on the same mold plate, but may be formed on different mold plates.

In this embodiment, the first fixed molding surface 811 and the second fixed molding surface 812 are formed concavely, and the first movable molding surface 821 and the second movable molding surface 822 are formed convexly. The invention is not limited to this. That is, the first stationary molding surface 811 and the second stationary molding surface 812 may be formed in a convex shape, and the first movable molding surface 821 and the second movable molding surface 822 may be formed in a concave shape.

Note that the movable mold 820 of this embodiment has a plurality of (for example, two) movable molding surfaces that sequentially form the first molding portion 801 and the second molding portion 805, but the number of movable molding surfaces can be one. good. The reason why the number of movable forming surfaces is plural in this embodiment is that the first molding portion 801 and the second molding portion 805 are formed simultaneously, thereby improving the production efficiency of the molded product.

Table 520 is rotatably attached to movable platen 120 . A rotation center line 520X of the table 520 is parallel to the mold opening/closing direction. The table 520 is formed so as not to interfere with the four tie bars 140 during rotation. Specifically, the table 520 is arranged inside the inscribed circle of the four tie bars 140 when viewed in the mold opening/closing direction.

Rotation mechanism 530 rotates table 520 . The rotation mechanism 530 has a rotation motor 531 and a transmission mechanism 532 that transmits the rotational driving force of the rotation motor 531 to the table 520 . The transmission mechanism 532 is composed of, for example, a driving gear 533, an intermediate gear 534, a passive gear 535, and the like.

Note that the rotary motor 531 is arranged on the side of the movable platen 120 , but may be arranged below or above the movable platen 120 . Also, the configuration of the transmission mechanism 532 may be general, for example, the transmission mechanism 532 may have a timing belt instead of gears.

The direction of rotation of table 520 may be reversed each time table 520 is rotated 180 degrees. For example, the rotation mechanism 530 rotates the table 520 clockwise by 180° and then rotates the table 520 counterclockwise by 180°. Since the arrangement of the wiring and piping fixed to the table 520 is restored, the wiring and piping can be easily routed.

As shown in FIG. 3, during mold clamping, the first movable molding surface 821 and the first fixed molding surface 811 form the first molding portion 801, and the second movable molding surface 822 and the second fixed molding surface 812 form the first molding portion 801. A second molded portion 805 is formed. A molding material is supplied from the first injection device 301 to the first molding unit 801, and the first molded product 21 is molded. Mold opening is then performed.

Next, as shown in FIG. 4 , the ejector device 200 ejects the first runner molded product 23 from the mold main body 830 of the movable mold 820 . Although details will be described later, the ejector device 200 does not eject the first cavity space molded product 22 together with the first runner molded product 23 when ejecting the first runner molded product 23 . The first cavity space molded product 22 is rotated by 180° together with the movable mold 820 while attached to the mold main body 830 of the movable mold 820 . Thereafter, mold clamping is performed as shown in FIG.

As shown in FIG. 5, during mold clamping, the second movable molding surface 822 and the first fixed molding surface 811 form the first molding portion 801, and the first movable molding surface 821 and the second fixed molding surface 812 form the first molding portion 801. A second molded portion 805 is formed. A part of the second molding portion 805 is provided with the first cavity space molded product 22 . A molding material is supplied from the second injection device 302 to the remaining portion of the second molding section 805, and the second cavity space molded product 26 is molded. The second cavity spatial molded product 26 partially includes the first cavity spatial molded product 22 .

Since the first runner molded product 23 has already been removed, the space from which the first runner molded product 23 has been removed can be used as a space for guiding the molding material from the second injection device 302 to the second molding section 805 . In addition, since the first runner molded product 23 has already been removed, the space from which the first runner molded product 23 has been removed can be filled with the molding material injected from the second injection device 302, and the color of the molding material can be changed. can be changed.

As shown in FIG. 5, during mold clamping, the first cavity space molded product 22 is molded in parallel with the molding of the second cavity space molded product 26 . The first cavity space molded product 22 is molded by the first molding section 801 . Mold opening is then performed.

Next, as shown in FIG. 6 , the ejector device 200 ejects the second cavity space molded product 26 from the mold main body 830 of the movable mold 820 . Although details will be described later, the ejector device 200 ejects the second runner molded product 27 together with the second cavity space molded product 26 .

In parallel with the ejection of the second cavity space molded product 26, the first runner molded product 23 is ejected. At this time, the first cavity space molded product 22 is not projected together with the first runner molded product 23 . After that, the mold is opened and the table 520 is rotated 180° again. The first cavity spatial molded product 22 is rotated by 180° together with the movable mold 820 . After that, the mold is clamped, and the first cavity space molded product 22 is arranged in a part of the second molded part 805 again.

3 and 5, the movable platen 120 has a front plate 121, an intermediate block 124, a rear block 126, and a toggle link mounting portion 128 (see FIGS. 1 and 2). The front plate 121, the intermediate block 124, the rear block 126, and the toggle link mounting portion 128 may be separately formed and connected, or may be integrally formed by casting or the like.

The front plate 121 supports the table 520 rotatably. The front plate 121 is formed with a first rod hole 122 penetrating the front plate 121 in the mold opening/closing direction. A first ejector rod 210 is arranged in the first rod hole 122 so as to be able to move back and forth. Further, the front plate 121 is formed with a second rod hole 123 penetrating the front plate 121 in the mold opening/closing direction. A second ejector rod 220 is arranged in the second rod hole 123 so as to be able to move back and forth.

The intermediate block 124 is arranged radially inside the cylindrical portion 523 of the table 520 . A space in which the first drive mechanism 211 of the ejector device 200 is arranged and a space in which the second drive mechanism 221 of the ejector device 200 is arranged are formed inside the intermediate block 124 .

Rear block 126 rotatably supports passive gear 535 . A space in which the first drive mechanism 211 of the ejector device 200 is arranged and a space in which the second drive mechanism 221 of the ejector device 200 is arranged are formed inside the rear block 126 .

A pair of toggle link mounting portions 128 (see FIGS. 1 and 2) are provided at the center of the rear end surface of the rear block 126 in the Y-axis direction, spaced apart in the Z-axis direction. Each of the pair of toggle link mounting portions 128 has a plurality of toggle link mounting plates perpendicular to the Y-axis direction at intervals in the Y direction. Each of the toggle link mounting plates protrudes rearward from the rear end surface of the rear block 126 and has a pin hole at its tip. A pin is inserted through the pin hole, and the first link 152 (see FIGS. 1 and 2) is pivotably attached to the toggle link attachment portion 128 via the pin.

The moving mechanism 102 moves the movable platen 120 back and forth with respect to the stationary platen 110 to perform mold closing, pressure increase, mold clamping, pressure release, and mold opening of the mold device 800 . When the mold is opened, the rotating mechanism 530 rotates the table 520 by 180°. The moving mechanism 102 has a toggle support 130 , a tie bar 140 , a toggle mechanism 150 , a mold clamping motor 160 , a motion converting mechanism 170 and a mold thickness adjusting mechanism 180 .

The toggle support 130 is spaced apart from the fixed platen 110 and mounted on the mold clamping device frame 910 so as to be movable in the mold opening/closing direction. In addition, the toggle support 130 may be arranged so as to be movable along a guide laid on the mold clamping device frame 910 . The guides of the toggle support 130 may be common with the guides 101 of the movable platen 120 .

In this embodiment, the fixed platen 110 is fixed to the mold clamping device frame 910, and the toggle support 130 is arranged to be movable in the mold opening/closing direction with respect to the mold clamping device frame 910. Fixed to the device frame 910 , the stationary platen 110 may be arranged to be movable relative to the mold clamping device frame 910 in the mold opening/closing direction.

The tie bar 140 connects the stationary platen 110 and the toggle support 130 with a gap L in the mold opening/closing direction. A plurality of (for example, four) tie bars 140 may be used. The multiple tie bars 140 are arranged parallel to the mold opening/closing direction and extend according to the mold clamping force. At least one tie bar 140 may be provided with a tie bar strain detector 141 that detects strain of the tie bar 140 . Tie-bar distortion detector 141 sends a signal indicating the detection result to control device 700 . The detection result of the tie bar strain detector 141 is used for detection of mold clamping force and the like.

In this embodiment, the tie bar strain detector 141 is used as a mold clamping force detector that detects the mold clamping force, but the present invention is not limited to this. The mold clamping force detector is not limited to the strain gauge type, but may be of piezoelectric type, capacitive type, hydraulic type, electromagnetic type, etc., and its mounting position is not limited to the tie bar 140 either.

The toggle mechanism 150 is arranged between the movable platen 120 and the toggle support 130 and moves the movable platen 120 relative to the toggle support 130 in the mold opening/closing direction. The toggle mechanism 150 is composed of a crosshead 151, a pair of link groups, and the like. A pair of link groups each has a first link 152 and a second link 153 that are connected by a pin or the like so as to be bendable and stretchable. The first link 152 is swingably attached to the movable platen 120 with a pin or the like. The second link 153 is swingably attached to the toggle support 130 with a pin or the like. A second link 153 is attached to the crosshead 151 via a third link 154 . When the crosshead 151 advances and retreats with respect to the toggle support 130 , the first link 152 and the second link 153 bend and stretch, and the movable platen 120 advances and retreats with respect to the toggle support 130 .

The configuration of the toggle mechanism 150 is not limited to the configuration shown in FIGS. 1 and 2. FIG. For example, in FIGS. 1 and 2, the number of nodes in each link group is five, but the number may be four, and one end of the third link 154 is coupled to the node between the first link 152 and the second link 153. may be

The mold clamping motor 160 is attached to the toggle support 130 and operates the toggle mechanism 150 . The mold clamping motor 160 advances and retreats the crosshead 151 with respect to the toggle support 130 , thereby bending and stretching the first link 152 and the second link 153 to advance and retreat the movable platen 120 with respect to the toggle support 130 . The mold clamping motor 160 is directly connected to the motion conversion mechanism 170, but may be connected to the motion conversion mechanism 170 via a belt, pulley, or the like.

The motion conversion mechanism 170 converts rotary motion of the mold clamping motor 160 into linear motion of the crosshead 151 . The motion conversion mechanism 170 includes a threaded shaft and a threaded nut that screws onto the threaded shaft. Balls or rollers may be interposed between the screw shaft and the screw nut.

The mold clamping device 100 performs a mold closing process, a pressure increasing process, a mold clamping process, a pressure releasing process, a mold opening process, a mold rotating process, and the like under the control of the control device 700 . The mold rotation process is performed after the completion of the mold opening process and before the start of the next mold closing process. Although the mold rotation process is performed after the ejection process is completed in this embodiment, it may be performed before the ejection process is completed. For example, if the position where the second cavity space molded product 26 is molded and the position where the second cavity space molded product 26 is ejected are different, the mold rotation step is performed after the completion of the mold opening step, and then the ejection step is performed. process is performed. Specifically, for example, when the position where the second cavity space molded product 26 is molded is on the operation side and the position where the second cavity space molded product 26 is projected is on the non-operation side, the mold opening step After completion, a mold rotation step is performed, followed by an ejection step.

In the mold closing process, the mold clamping motor 160 is driven to advance the crosshead 151 to the mold closing completion position at the set movement speed, thereby advancing the movable platen 120 and bringing the movable mold 820 into contact with the fixed mold 810. . The position and moving speed of the crosshead 151 are detected using, for example, a mold clamping motor encoder 161 or the like. The mold clamping motor encoder 161 detects rotation of the mold clamping motor 160 and sends a signal indicating the detection result to the control device 700 .

The crosshead position detector for detecting the position of the crosshead 151 and the crosshead movement speed detector for detecting the movement speed of the crosshead 151 are not limited to the mold clamping motor encoder 161, and general ones are used. can. Further, the movable platen position detector for detecting the position of the movable platen 120 and the movable platen moving speed detector for detecting the moving speed of the movable platen 120 are not limited to the mold clamping motor encoder 161, and general ones are used. can.

In the pressurization step, the mold clamping motor 160 is further driven to further advance the crosshead 151 from the mold closing completion position to the mold clamping position, thereby generating a mold clamping force.

In the mold clamping process, the mold clamping motor 160 is driven to maintain the position of the crosshead 151 at the mold clamping position. In the mold clamping process, the mold clamping force generated in the pressurizing process is maintained. In the mold clamping process, a first molding portion 801 and a second molding portion 805 are formed between the movable mold 820 and the fixed mold 810 .

In the depressurization step, the mold clamping motor 160 is driven to retract the crosshead 151 from the mold clamping position to the mold opening start position, thereby retracting the movable platen 120 and reducing the mold clamping force. The mold opening start position and the mold closing completion position may be the same position.

In the mold opening step, the mold clamping motor 160 is driven to retract the crosshead 151 from the mold opening start position to the mold opening completion position at a set moving speed, thereby retracting the movable platen 120 and moving the movable mold 820 to the fixed metal. away from the mold 810;

After completion of the mold opening process, an ejecting process is performed before starting the next mold closing process. In the ejecting step, the ejector device 200 ejects the first runner molded product 23 from the mold main body 830 of the movable mold 820 . The first cavity space molding 22 is not extruded together with the first runner molding 23 . Also, in the ejecting step, the ejector device 200 ejects the second cavity space molded product 26 from the mold main body 830 of the movable mold 820 . After the ejection process is completed, a mold rotation process is performed before starting the next mold closing process.

In the mold rotation step, the table 520 is rotated to rotate the first cavity spatial molded product 22 together with the movable mold 820 . After that, the mold closing process and the pressurization process are performed, whereby the first cavity space molded product 22 is arranged in a part of the second molding part 805 .

The set conditions in the mold closing process, the pressurizing process, and the mold clamping process are collectively set as a series of set conditions. For example, the moving speed and position of the crosshead 151 (including the mold closing start position, the moving speed switching position, the mold closing completion position, and the mold clamping position) and the mold clamping force in the mold closing process and the pressurizing process are set as a series of setting conditions. are collectively set as The mold closing start position, the movement speed switching position, the mold closing completion position, and the mold clamping position are arranged in this order from the rear side to the front side, and represent the start point and end point of the section in which the movement speed is set. A moving speed is set for each section. The moving speed switching position may be one or plural. The moving speed switching position does not have to be set. Only one of the mold clamping position and the mold clamping force may be set.

The set conditions in the depressurization process and the mold opening process are also set in the same manner. For example, the moving speed and position of the crosshead 151 (mold opening start position, moving speed switching position, and mold opening completion position) in the depressurizing process and the mold opening process are collectively set as a series of setting conditions. The mold opening start position, the movement speed switching position, and the mold opening completion position are arranged in this order from the front side to the rear side, and represent the start point and end point of the section for which the movement speed is set. A moving speed is set for each section. The moving speed switching position may be one or plural. The moving speed switching position does not have to be set. The mold opening start position and the mold closing completion position may be the same position. Also, the mold opening completion position and the mold closing start position may be the same position.

Incidentally, instead of the moving speed and position of the crosshead 151, the moving speed and position of the movable platen 120 may be set. Also, the mold clamping force may be set instead of the position of the crosshead (for example, mold clamping position) or the position of the movable platen.

By the way, the toggle mechanism 150 amplifies the driving force of the mold clamping motor 160 and transmits it to the movable platen 120 . The amplification factor is also called toggle factor. The toggle magnification changes according to the angle θ formed between the first link 152 and the second link 153 (hereinafter also referred to as “link angle θ”). The link angle θ is obtained from the position of the crosshead 151 . When the link angle θ is 180°, the toggle magnification becomes maximum.

When the thickness of the mold apparatus 800 changes due to replacement of the mold apparatus 800 or temperature change of the mold apparatus 800, mold thickness adjustment is performed so that a predetermined mold clamping force can be obtained during mold clamping. In the mold thickness adjustment, for example, the distance L between the fixed platen 110 and the toggle support 130 is adjusted so that the link angle θ of the toggle mechanism 150 becomes a predetermined angle when the movable mold 820 touches the fixed mold 810 . to adjust.

The mold clamping device 100 has a mold thickness adjusting mechanism 180 . The mold thickness adjustment mechanism 180 adjusts the mold thickness by adjusting the distance L between the stationary platen 110 and the toggle support 130 . The timing of mold thickness adjustment is, for example, between the end of a molding cycle and the start of the next molding cycle. The mold thickness adjusting mechanism 180 is, for example, a threaded shaft 181 formed at the rear end of the tie bar 140, a screw nut 182 held by the toggle support 130 so as to be rotatable and non-retractable, and screwed to the threaded shaft 181. and a mold thickness adjusting motor 183 that rotates the screw nut 182 .

A threaded shaft 181 and a threaded nut 182 are provided for each tie bar 140 . The rotational driving force of the mold thickness adjusting motor 183 may be transmitted to the multiple screw nuts 182 via the rotational driving force transmission portion 185 . Multiple screw nuts 182 can be rotated synchronously. By changing the transmission path of the rotational driving force transmission portion 185, it is also possible to rotate the plurality of screw nuts 182 individually.

The rotational driving force transmission section 185 is configured by, for example, a gear. In this case, a passive gear is formed on the outer circumference of each screw nut 182, a driving gear is attached to the output shaft of the mold thickness adjusting motor 183, and an intermediate gear meshing with the plurality of passive gears and the driving gear is formed in the central portion of the toggle support 130. rotatably held. It should be noted that the rotational driving force transmission section 185 may be configured by a belt, a pulley, or the like instead of the gear.

The operation of the mold thickness adjusting mechanism 180 is controlled by the controller 700 . The control device 700 drives the mold thickness adjusting motor 183 to rotate the screw nut 182 . As a result, the position of toggle support 130 with respect to tie bar 140 is adjusted, and the distance L between stationary platen 110 and toggle support 130 is adjusted. A plurality of mold thickness adjusting mechanisms may be used in combination.

The interval L is detected using the mold thickness adjusting motor encoder 184 . The mold thickness adjusting motor encoder 184 detects the amount and direction of rotation of the mold thickness adjusting motor 183 and sends a signal indicating the detection result to the control device 700 . The detection result of the mold thickness adjustment motor encoder 184 is used for monitoring and controlling the position and interval L of the toggle support 130 . The toggle support position detector for detecting the position of the toggle support 130 and the gap detector for detecting the gap L are not limited to the mold thickness adjusting motor encoder 184, and general ones can be used.

The mold clamping device 100 of this embodiment is a horizontal type in which the mold opening/closing direction is horizontal, but may be a vertical type in which the mold opening/closing direction is a vertical direction.

Although the mold clamping device 100 of this embodiment has the mold clamping motor 160 as a drive source, the mold clamping motor 160 may be replaced by a hydraulic cylinder. Further, the mold clamping device 100 may have a linear motor for mold opening and closing and an electromagnet for mold clamping.

(ejector device)
In the description of the ejector device 200, as in the description of the mold clamping device 100, the moving direction of the movable platen 120 when the mold is closed (for example, the positive direction of the X axis) is defined as the front, and the moving direction of the movable platen 120 when the mold is opened (for example, X-axis negative direction) will be described as the rear. The ejector device 200 advances and retreats together with the movable platen 120 .

The ejector device 200 has a first ejector rod 210, as shown in FIGS. The first ejector rod 210 waits behind the table 520 so as not to interfere with the table 520 when the table 520 rotates. After rotating the table 520 , the first ejector rod 210 moves forward and enters the inside of the table 520 . As a result, although the details will be described later, the first runner molded product 23 is projected. After that, the first ejector rod 210 retracts and leaves the table 520 .

The ejector device 200 has a first drive mechanism 211 that advances and retracts a first ejector rod 210 . The first drive mechanism 211 includes, for example, a first ejector motor 212, a first crosshead 214, and a first motion conversion mechanism 216 that converts the rotary motion of the first ejector motor 212 into the linear motion of the first crosshead 214. have

The first motion conversion mechanism 216 includes a threaded shaft and a threaded nut that screws onto the threaded shaft. Balls or rollers may be interposed between the screw shaft and the screw nut. The first crosshead 214 moves in the mold opening/closing direction along the first guide bar 215 . A rear end portion of the first ejector rod 210 is attached to the first crosshead 214 , and the first ejector rod 210 advances and retreats together with the first crosshead 214 .

The control device 700 controls the position of the first ejector rod 210 when moving the first ejector rod 210 forward and backward. The position of the first ejector rod 210 is detected using a first ejector motor encoder 213, for example. The first ejector motor encoder 213 detects rotation of the first ejector motor 212 and sends a signal indicating the detection result to the control device 700 . The first ejector rod position detector for detecting the position of the first ejector rod 210 is not limited to the first ejector motor encoder 213, and a general one can be used.

The ejector device 200 has a second ejector rod 220 . The second ejector rod 220 waits behind the table 520 so as not to interfere with the table 520 when the table 520 rotates. After rotating the table 520 , the second ejector rod 220 advances and enters the inside of the table 520 . As a result, although the details will be described later, the second cavity spatial molded product 26 is projected. The second ejector rod 220 then retracts and exits the table 520 .

The ejector device 200 has a second drive mechanism 221 that advances and retracts the second ejector rod 220 . The second drive mechanism 221 includes, for example, a second ejector motor 222, a second crosshead 224, and a second motion conversion mechanism 226 that converts the rotational motion of the second ejector motor 222 into linear motion of the second crosshead 224. have

The second motion conversion mechanism 226 includes a threaded shaft and a threaded nut that screws onto the threaded shaft. Balls or rollers may be interposed between the screw shaft and the screw nut. The second crosshead 224 moves along the second guide bar 225 in the mold opening/closing direction. A rear end portion of the second ejector rod 220 is attached to the second crosshead 224 , and the second ejector rod 220 advances and retreats together with the second crosshead 224 .

The control device 700 controls the position of the second ejector rod 220 when moving the second ejector rod 220 forward and backward. The position of the second ejector rod 220 is detected using a second ejector motor encoder 223, for example. The second ejector motor encoder 223 detects rotation of the second ejector motor 222 and sends a signal indicating the detection result to the control device 700 . The second ejector rod position detector for detecting the position of the second ejector rod 220 is not limited to the second ejector motor encoder 223, and a general one can be used.

The ejector device 200 has a first drive mechanism 211 and a second drive mechanism 221 . Therefore, the control device 700 can separately control the advance/retreat of the first ejector rod 210 and the advance/retreat of the second ejector rod 220 . The protrusion of the second cavity space molded product 26 and the protrusion of the first runner molded product 23 can be separately controlled.

For example, the control device 700 sets the advancing speed of the second ejector rod 220 to be lower than the advancing speed of the first ejector rod 210 . Since the second cavity space-molded product 26 is gently ejected, the stress acting on the second cavity space-molded product 26 during ejection can be reduced, and quality deterioration of the second cavity space-molded product 26 can be suppressed.

Controller 700 monitors the torque of second ejector motor 222 as second ejector rod 220 advances. When the torque of the second ejector motor 222 exceeds the upper limit, the control device 700 makes the forward speed of the second ejector rod 220 slower than the set speed so that the torque becomes equal to or less than the upper limit.

The upper limit of the torque of the second ejector motor 222 is set, for example, based on the relationship between the stress applied to the second cavity spatial molded product 26 during ejection and the defect rate of the second cavity spatial molded product 26 . Also, the upper limit value of the torque of the second ejector motor 231 is set smaller than the upper limit value of the torque of the first ejector motor 212 .

Note that the first drive mechanism 211 may have a first hydraulic cylinder instead of the combination of the first ejector motor 212 and the first motion conversion mechanism 216 . Similarly, the second drive mechanism 221 may have a second hydraulic cylinder instead of the combination of the second ejector motor 222 and the second motion conversion mechanism 226 .

A common drive mechanism may be used for the first ejector rod 210 and the second ejector rod 220 . The drive mechanism advances and retracts both the first ejector rod 210 and the second ejector rod 220 by, for example, one ejector motor or one hydraulic cylinder. The cost of the drive mechanism can be reduced.

The first ejector rod 210 and the second ejector rod 220 are spaced apart in the Y-axis direction. This is because the first molding portion 801 and the second molding portion 805 are arranged with an interval in the Y-axis direction.

For example, the first forming part 801 and the first ejector rod 210 are arranged on the operation side. A second forming part 805 and a second ejector rod 220 are arranged on the non-operating side. The second cavity space molded product 26 can be taken out on the non-operating side.

(First injection device and second injection device)
In the description of the first injection device 301 and the second injection device 302, unlike the description of the mold clamping device 100 and the like, the moving direction of the screw 330 during filling (for example, the negative direction of the X axis) is defined as forward, and the direction of movement of the screw 330 during metering is defined as forward. The direction of movement of (for example, the positive direction of the X-axis) will be described as the rearward direction.

The first injection device 301 is installed on a first slide base 303 , and the first slide base 303 is arranged to move back and forth with respect to the injection device frame 920 . The first injection device 301 is arranged to move back and forth with respect to the mold device 800 . The first injection device 301 touches the mold device 800 (more specifically, the stationary mold 810) and fills the first molding section 801 in the mold device 800 with the molding material.

The second injection device 302 is installed on a second slide base, and the second slide base is arranged to move back and forth with respect to the injection device frame 920 . The second injection device 302 is arranged to move back and forth with respect to the mold device 800 . The second injection device 302 touches the mold device 800 (more specifically, the fixed mold 810) and fills the second molding section 805 in the mold device 800 with the molding material.

The first injection device 301 and the second injection device 302 are spaced apart in the Y-axis direction. This is because the first molding portion 801 and the second molding portion 805 are arranged with an interval in the Y-axis direction. The molding material with which the first injection device 301 fills the first molding portion 801 and the molding material with which the second injection device 302 fills the second molding portion 805 may be different materials or may be the same material.

The first injection device 301 and the second injection device 302 are similarly configured. Therefore, the configuration of the first injection device 301 will be described below, and the description of the configuration of the second injection device 302 will be omitted. The first injection device 301 has, for example, a cylinder 310, a nozzle 320, a screw 330, a metering motor 340, an injection motor 350, a pressure detector 360, etc., as shown in FIGS.

The cylinder 310 heats the molding material supplied inside from the supply port 311 . The molding material includes, for example, resin. The molding material is formed into, for example, a pellet shape and supplied to the supply port 311 in a solid state. A supply port 311 is formed in the rear portion of the cylinder 310 . A cooler 312 such as a water-cooled cylinder is provided on the outer circumference of the rear portion of the cylinder 310 . A heater 313 such as a band heater and a temperature detector 314 are provided on the outer periphery of the cylinder 310 ahead of the cooler 312 .

Cylinder 310 is divided into a plurality of zones in the axial direction of cylinder 310 (for example, the X-axis direction). A heater 313 and a temperature detector 314 are provided in each of the plurality of zones. A set temperature is set for each of the plurality of zones, and the controller 700 controls the heater 313 so that the temperature detected by the temperature detector 314 becomes the set temperature.

A nozzle 320 is provided at the front end of the cylinder 310 and pressed against the mold device 800 . A heater 313 and a temperature detector 314 are provided around the nozzle 320 . The controller 700 controls the heater 313 so that the detected temperature of the nozzle 320 becomes the set temperature.

The screw 330 is arranged in the cylinder 310 so as to be rotatable and advanceable. When the screw 330 is rotated, the molding material is sent forward along the helical groove of the screw 330 . The molding material is gradually melted by the heat from the cylinder 310 while being fed forward. The screw 330 is retracted as liquid molding material is fed forward of the screw 330 and accumulated at the front of the cylinder 310 . After that, when the screw 330 is advanced, the liquid molding material accumulated in front of the screw 330 is injected from the nozzle 320 and filled in the mold device 800 .

A backflow prevention ring 331 is movably attached to the front portion of the screw 330 as a backflow prevention valve that prevents backflow of the molding material from the front to the rear of the screw 330 when the screw 330 is pushed forward.

The anti-backflow ring 331 is pushed backward by the pressure of the molding material in front of the screw 330 when the screw 330 is advanced, and is relatively to the screw 330 until it reaches a closed position (see FIG. 2) that blocks the flow path of the molding material. fall back. This prevents the molding material accumulated in front of the screw 330 from flowing backward.

On the other hand, the anti-backflow ring 331 is pushed forward by the pressure of the molding material sent forward along the helical groove of the screw 330 when the screw 330 is rotated, and is in an open position where the flow path of the molding material is opened. (see FIG. 1) relative to the screw 330. Thereby, the molding material is sent forward of the screw 330 .

The anti-backflow ring 331 may be either a co-rotating type that rotates together with the screw 330 or a non-co-rotating type that does not rotate together with the screw 330 .

The first injection device 301 may have a drive source for moving the backflow prevention ring 331 forward and backward with respect to the screw 330 between the open position and the closed position.

Metering motor 340 rotates screw 330 . The drive source for rotating the screw 330 is not limited to the metering motor 340, and may be, for example, a hydraulic pump.

The injection motor 350 advances and retreats the screw 330 . Between the injection motor 350 and the screw 330, a motion conversion mechanism or the like that converts the rotary motion of the injection motor 350 into the linear motion of the screw 330 is provided. The motion conversion mechanism has, for example, a screw shaft and a screw nut screwed onto the screw shaft. Balls, rollers, or the like may be provided between the screw shaft and the screw nut. The drive source for advancing and retreating the screw 330 is not limited to the injection motor 350, and may be, for example, a hydraulic cylinder.

Pressure detector 360 detects the pressure transmitted between injection motor 350 and screw 330 . The pressure detector 360 is provided in the pressure transmission path between the injection motor 350 and the screw 330 and detects the pressure acting on the pressure detector 360 .

Pressure detector 360 sends a signal indicating the detection result to controller 700 . The detection result of the pressure detector 360 is used for controlling and monitoring the pressure that the screw 330 receives from the molding material, the back pressure against the screw 330, the pressure that the screw 330 acts on the molding material, and the like.

The first injection device 301 performs a weighing process, a filling process, a holding pressure process, and the like under the control of the control device 700 . The filling process and the holding pressure process are collectively called an injection process.

In the weighing process, the weighing motor 340 is driven to rotate the screw 330 at a set rotation speed, and the molding material is fed forward along the helical groove of the screw 330 . Along with this, the molding material is gradually melted. The screw 330 is retracted as liquid molding material is fed forward of the screw 330 and accumulated at the front of the cylinder 310 . The rotation speed of the screw 330 is detected using a metering motor encoder 341, for example. Weighing motor encoder 341 detects the rotation of weighing motor 340 and sends a signal indicating the detection result to control device 700 . Incidentally, the screw rotation speed detector for detecting the rotation speed of the screw 330 is not limited to the metering motor encoder 341, and a general one can be used.

During the metering process, the injection motor 350 may be driven to apply a set back pressure to the screw 330 to limit its rapid retraction. The back pressure on screw 330 is detected using pressure detector 360, for example. Pressure detector 360 sends a signal indicating the detection result to controller 700 . The metering process is completed when the screw 330 is retracted to the metering completion position and a predetermined amount of molding material is accumulated in front of the screw 330 .

The position and rotation speed of the screw 330 in the weighing process are collectively set as a series of setting conditions. For example, a weighing start position, rotation speed switching position, and weighing completion position are set. These positions are arranged in this order from the front side to the rear side, and represent the start point and end point of the section in which the rotational speed is set. A rotation speed is set for each section. The rotational speed switching position may be one or plural. The rotation speed switching position does not have to be set. Also, the back pressure is set for each section.

In the filling process, the injection motor 350 is driven to advance the screw 330 at a set moving speed, and the liquid molding material accumulated in front of the screw 330 is filled into the first molding section 801 in the mold device 800 . The position and moving speed of the screw 330 are detected using an injection motor encoder 351, for example. The injection motor encoder 351 detects rotation of the injection motor 350 and sends a signal indicating the detection result to the control device 700 . When the position of the screw 330 reaches the set position, switching from the filling process to the holding pressure process (so-called V/P switching) is performed. The position at which V/P switching takes place is also called the V/P switching position. The set moving speed of the screw 330 may be changed according to the position of the screw 330, time, and the like.

The position and moving speed of the screw 330 in the filling process are collectively set as a series of setting conditions. For example, a filling start position (also called an “injection start position”), a moving speed switching position, and a V/P switching position are set. These positions are arranged in this order from the rear side to the front side, and represent the start point and end point of the section for which the movement speed is set. A moving speed is set for each section. The moving speed switching position may be one or plural. The moving speed switching position does not have to be set.

An upper limit value of the pressure of the screw 330 is set for each section in which the moving speed of the screw 330 is set. The pressure of screw 330 is detected by pressure detector 360 . When the detected value of the pressure detector 360 is equal to or less than the set pressure, the screw 330 is advanced at the set moving speed. On the other hand, when the detected value of the pressure detector 360 exceeds the set pressure, the screw 330 moves at a slower moving speed than the set moving speed so that the detected value of the pressure detector 360 becomes equal to or less than the set pressure for the purpose of mold protection. to move forward.

After the position of the screw 330 reaches the V/P switching position in the filling process, the screw 330 may be temporarily stopped at the V/P switching position, and then the V/P switching may be performed. Immediately before the V/P switching, instead of stopping the screw 330, the screw 330 may be slowly advanced or slowly retracted. Further, the screw position detector for detecting the position of the screw 330 and the screw moving speed detector for detecting the moving speed of the screw 330 are not limited to the injection motor encoder 351, and general ones can be used.

In the holding pressure process, the injection motor 350 is driven to push the screw 330 forward, and the pressure of the molding material at the front end of the screw 330 (hereinafter also referred to as “holding pressure”) is maintained at the set pressure. The remaining molding material is pushed toward the mold device 800 . A shortage of molding material due to cooling shrinkage in the mold apparatus 800 can be replenished. The holding pressure is detected using a pressure detector 360, for example. Pressure detector 360 sends a signal indicating the detection result to controller 700 . The set value of the holding pressure may be changed according to the elapsed time from the start of the holding pressure process. A plurality of holding pressures and holding times for holding the holding pressure in the holding pressure step may be set respectively, and may be collectively set as a series of setting conditions.

In the holding pressure process, the molding material in the first cavity space 802 in the mold device 800 is gradually cooled, and when the holding pressure process is completed, the entrance of the first cavity space 802 is closed with the solidified molding material. This state is called a gate seal, and the reverse flow of the molding material from the first cavity space 802 is prevented. After the holding pressure process, the cooling process is started. In the cooling process, the molding material in the first cavity space 802 is solidified. In the cooling process, the molding material in the first communication space 803 is also solidified. A metering step may be performed during the cooling step for the purpose of shortening the molding cycle time.

The first injection device 301 of the present embodiment is of the in-line screw system, but may be of the pre-plastic system or the like. A pre-plastic injection apparatus supplies molding material melted in a plasticizing cylinder to an injection cylinder, and injects the molding material from the injection cylinder into a mold apparatus. Inside the plasticizing cylinder, a screw is arranged to be rotatable and non-retractable, or a screw is arranged to be rotatable and reciprocal. On the other hand, a plunger is arranged in the injection cylinder so that it can move back and forth.

Further, the first injection device 301 of the present embodiment is a horizontal type in which the axial direction of the cylinder 310 is horizontal, but may be a vertical type in which the axial direction of the cylinder 310 is vertical. The mold clamping device combined with the vertical first injection device 301 may be vertical or horizontal. Similarly, the mold clamping device combined with the horizontal first injection device 301 may be horizontal or vertical.

(First moving device and second moving device)
In the description of the first moving device 401 and the second moving device (not shown), similarly to the description of the first injection device 301 and the second injection device 302, the moving direction of the screw 330 during filling (for example, the negative direction of the X axis) is forward, and the moving direction of the screw 330 during weighing (for example, the positive direction of the X-axis) is backward.

The first moving device 401 advances and retreats the first injection device 301 with respect to the mold device 800 . Also, the first moving device 401 presses the nozzle 320 of the first injection device 301 against the mold device 800 to generate nozzle touch pressure.

The second moving device advances and retreats the second injection device 302 with respect to the mold device 800 . Also, the second moving device presses the nozzle of the second injection device 302 against the mold device 800 to generate a nozzle touch pressure.

The first moving device 401 and the second moving device are spaced apart in the Y-axis direction. The first moving device 401 and the second moving device move the first injection device 301 and the second injection device 302 independently.

The first moving device 401 and the second moving device are similarly configured. Therefore, the configuration of the first mobile device 401 will be described below, and the description of the configuration of the second mobile device will be omitted. The first moving device 401 includes, as shown in FIGS. 1 and 2, a hydraulic pump 410, a motor 420 as a drive source, a hydraulic cylinder 430 as a hydraulic actuator, and the like.

Hydraulic pump 410 has a first port 411 and a second port 412 . Hydraulic pump 410 is a pump that can rotate in both directions, and by switching the rotation direction of motor 420, hydraulic fluid (for example, oil) is sucked from one of first port 411 and second port 412 and discharged from the other. to generate hydraulic pressure. The hydraulic pump 410 can also suck the working fluid from the tank and discharge the working fluid from either the first port 411 or the second port 412 .

Motor 420 operates hydraulic pump 410 . Motor 420 drives hydraulic pump 410 with a rotational direction and rotational torque according to a control signal from control device 700 . Motor 420 may be an electric motor or may be an electric servomotor.

Hydraulic cylinder 430 has a cylinder body 431 , a piston 432 and a piston rod 433 . The cylinder body 431 is fixed with respect to the first injection device 301 . The piston 432 partitions the inside of the cylinder body 431 into a front chamber 435 as a first chamber and a rear chamber 436 as a second chamber. Piston rod 433 is fixed relative to stationary platen 110 .

The front chamber 435 of the hydraulic cylinder 430 is connected to the first port 411 of the hydraulic pump 410 via the first flow path 413 . The hydraulic fluid discharged from the first port 411 is supplied to the front chamber 435 through the first flow path 413, thereby pushing the first injection device 301 forward. The first injection device 301 is advanced and the nozzle 320 of the first injection device 301 is pressed against the stationary mold 810 . The front chamber 435 functions as a pressure chamber that generates nozzle touch pressure of the nozzle 320 by the pressure of the hydraulic fluid supplied from the hydraulic pump 410 .

On the other hand, the rear chamber 436 of the hydraulic cylinder 430 is connected to the second port 412 of the hydraulic pump 410 via the second flow path 414 . The hydraulic fluid discharged from the second port 412 is supplied to the rear chamber 436 of the hydraulic cylinder 430 via the second flow path 414, thereby pushing the first injection device 301 rearward. The first injection device 301 is retracted and the nozzle 320 of the first injection device 301 is separated from the stationary mold 810 .

Although the first moving device 401 includes the hydraulic cylinder 430 in this embodiment, the present invention is not limited to this. For example, instead of the hydraulic cylinder 430, an electric motor and a motion conversion mechanism that converts the rotary motion of the electric motor to the linear motion of the first injection device 301 may be used.

(Control device)
The control device 700 is composed of, for example, a computer, and has a CPU (Central Processing Unit) 701, a storage medium 702 such as a memory, an input interface 703, and an output interface 704, as shown in FIGS. The control device 700 performs various controls by causing the CPU 701 to execute programs stored in the storage medium 702 . The control device 700 also receives signals from the outside through an input interface 703 and transmits signals to the outside through an output interface 704 .

The control device 700 repeatedly performs a weighing process, a mold closing process, a pressurizing process, a mold clamping process, a filling process, a holding pressure process, a cooling process, a depressurizing process, a mold opening process, an ejecting process, a mold rotating process, and the like. , the first molded product 21 and the second molded product 25 are manufactured repeatedly. A series of operations for obtaining the first molded product 21 and the second molded product 25, for example, the operation from the start of the weighing process to the start of the next weighing process is also called "shot" or "molding cycle". The time required for one shot is also called "molding cycle time" or "cycle time".

One molding cycle includes, for example, a metering process, a mold closing process, a pressurizing process, a mold clamping process, a filling process, a holding pressure process, a cooling process, a depressurizing process, a mold opening process, an ejecting process, and a mold rotating process. have in order. The order here is the order of the start of each step. The filling process, holding pressure process, and cooling process are performed during the clamping process. The start of the clamping process may coincide with the start of the filling process. The end of the depressurization process coincides with the start of the mold opening process.

A plurality of steps may be performed simultaneously for the purpose of shortening the molding cycle time. For example, the metering step may occur during the cooling step of the previous molding cycle and may occur during the clamping step. In this case, the mold closing process may be performed at the beginning of the molding cycle. The filling process may also be initiated during the mold closing process. Also, the ejecting process may be initiated during the mold opening process. If an on-off valve for opening and closing the flow path of the nozzle 320 is provided, the mold opening process may be initiated during the metering process. This is because the molding material will not leak from the nozzle 320 as long as the on-off valve closes the flow path of the nozzle 320 even if the mold opening process is started during the metering process.

In addition, one molding cycle includes the weighing process, mold closing process, pressurizing process, mold clamping process, filling process, holding pressure process, cooling process, depressurizing process, mold opening process, ejection process, and mold rotation process. You may have a process.

For example, after the pressure holding process is completed and before the measurement process is started, a pre-measuring suckback process may be performed to retract the screw 330 to a preset measurement start position. It is possible to reduce the pressure of the molding material accumulated in front of the screw 330 before the start of the metering process, and to prevent the screw 330 from abrupt retraction at the start of the metering process.

After the weighing process is completed and before the filling process starts, a post-weighing suck-back process may be performed in which the screw 330 is retracted to a preset filling start position (also referred to as an “injection start position”). The pressure of the molding material accumulated in front of the screw 330 before the start of the filling process can be reduced, and leakage of the molding material from the nozzle 320 before the start of the filling process can be prevented.

The control device 700 is connected to an operation device 750 and a display device 760 . The operation device 750 receives input operations by the user and outputs signals corresponding to the input operations to the control device 700 . The display device 760 displays a display screen corresponding to an input operation on the operation device 750 under the control of the control device 700 .

The display screen is used for setting the injection molding machine 10 and the like. A plurality of display screens are prepared and displayed by switching or displayed in an overlapping manner. The user sets the injection molding machine 10 (including input of setting values) by operating the operation device 750 while viewing the display screen displayed on the display device 760 .

The operation device 750 and the display device 760 may be configured by, for example, a touch panel and integrated. Although the operating device 750 and the display device 760 of this embodiment are integrated, they may be provided independently. Also, a plurality of operating devices 750 may be provided. The operating device 750 and the display device 760 are arranged on the Y-axis direction negative side of the mold clamping device 100 (more specifically, the stationary platen 110). The Y-axis direction negative side is called the operating side, and the Y-axis direction positive side is called the non-operating side.

(table pin)
First, the configuration of the table 520 will be described with reference to FIGS. 3 to 7. FIG. The table 520 has, for example, a mold mounting portion 521 , a disk portion 522 and a cylindrical portion 523 .

A movable mold 820 is attached to the mold mounting portion 521 . The mold mounting portion 521 is formed in a plate shape perpendicular to the mold opening/closing direction. Since the movable mold 820 is often formed in a rectangular shape when viewed in the mold opening/closing direction, the mold mounting portion 521 is also formed in a rectangular shape.

The movable mold 820 is formed in a rectangular shape when viewed in the mold opening/closing direction because the first movable molding surface 821 and the second movable molding surface 822 are spaced parallel to the long sides of the movable mold 820 . because it is formed

The disc portion 522 is formed in a plate shape perpendicular to the mold opening/closing direction. The disk portion 522 is formed in a circular shape when viewed in the mold opening/closing direction. The disk portion 522 is arranged between the mold mounting portion 521 and the cylindrical portion 523 .

The cylindrical portion 523 extends from the outer peripheral portion of the disc portion 522 to the negative side in the X-axis direction. A passive gear 535 is fixed to the cylindrical portion 523 over the entire circumference. The passive gear 535 is part of a transmission mechanism 532 that transmits the rotational driving force of the rotary motor 531 to the table 520 .

A table through-hole 524 is formed in the table 520 so as to pass through the table 520 in the mold opening/closing direction. The table through hole 524 penetrates, for example, the mold mounting portion 521 and the disk portion 522 .

A plurality of table through-holes 524 are arranged rotationally symmetrically (for example, 180° rotationally symmetrical) around the rotational center line 520X of the table 520 . The first ejector rod 210 and the second ejector rod 220 are sequentially inserted into and removed from each of the plurality of table through holes 524 .

The injection molding machine 10 has a table pin 560 arranged inside the table 520 . The table pin 560 has, for example, a first table pin 540 and a second table pin 550 .

The first table pin 540 is arranged inside the table 520 so as to move back and forth in the mold opening/closing direction. Specifically, the first table pin 540 is arranged in the table through-hole 524 so as to be able to advance and retreat in the mold opening/closing direction. The first table pin 540 rotates together with the table 520 . A plurality of first table pins 540 are arranged rotationally symmetrically (for example, 180° rotationally symmetrical) around the rotation center line 520X of the table 520 .

The second table pin 550 is arranged inside the table 520 so as to move back and forth in the mold opening/closing direction. Specifically, the second table pin 550 is arranged in the table through-hole 524 so as to be able to advance and retreat in the mold opening/closing direction. The second table pin 550 rotates together with the table 520 . A plurality of second table pins 550 are arranged rotationally symmetrically (for example, 180° rotationally symmetrical) about the rotation center line 520X of the table 520 .

A through hole is formed in the second table pin 550 so as to pass through the second table pin 550 in the mold opening/closing direction. A first table pin 540 is arranged in the through hole so as to be movable back and forth. The first table pin 540 and the second table pin 550 are arranged inside the same table through hole 524 . The number of table through holes 524 can be reduced, the structure of the table 520 can be simplified, and the manufacturing cost of the table 520 can be reduced.

As shown in FIG. 7, the first table pin 540 coaxially has a first large-diameter shaft portion 541 and a first small-diameter shaft portion 542 having a smaller diameter than the first large-diameter shaft portion 541 . The first small-diameter shaft portion 542 is arranged behind the first large-diameter shaft portion 541 (on the negative side in the X-axis direction). A first bushing 543 having an outer diameter larger than that of the first large-diameter shaft portion 541 is fixed to the first small-diameter shaft portion 542 . The outer peripheral surface of the first bushing 543 is in sliding contact with the inner peripheral surface of the cylindrical second table pin 550 (more specifically, the second large-diameter shaft portion 551 described later).

The second table pin 550 coaxially has a second large-diameter shaft portion 551 and a second small-diameter shaft portion 552 having an outer diameter smaller than that of the second large-diameter shaft portion 551 . The second small-diameter shaft portion 552 is arranged behind the second large-diameter shaft portion 551 (on the negative side in the X-axis direction). A second bushing 553 having an outer diameter larger than that of the second large-diameter shaft portion 551 is fixed to the second small-diameter shaft portion 552 . The outer peripheral surface of the second bushing 553 is in sliding contact with the hole wall surface of the table through hole 524 (more specifically, the large-diameter hole portion 525 described later).

The second large-diameter shaft portion 551 is formed in a cylindrical shape, and the first large-diameter shaft portion 541 is arranged therein so as to be able to move back and forth. A third bushing 554 is fixed to the inner peripheral surface of the second large-diameter shaft portion 551 . The inner peripheral surface of the third bushing 554 makes sliding contact with the outer peripheral surface of the first table pin 540 (more specifically, the first large diameter shaft portion 541). The third bushing 554 has a role of a stopper. The third bushing 554 abuts against the front end surface of the first bushing 543 to prevent the first table pin 540 from slipping forward from the second table pin 550 .

The second small-diameter shaft portion 552 is formed in a cylindrical shape, and the first small-diameter shaft portion 542 is arranged therein so as to be able to move back and forth. The inner diameter of the second small diameter shaft portion 552 is smaller than the inner diameter of the second large diameter shaft portion 551 . A step surface 555 is formed between the inner peripheral surface of the second small diameter shaft portion 552 and the inner peripheral surface of the second large diameter shaft portion 551 . This step surface 555 has a role of a stopper. The stepped surface 555 abuts on the rear end surface of the first bushing 543 to prevent the first table pin 540 from coming out of the second table pin 550 rearward.

The table through-hole 524 coaxially has a large-diameter hole portion 525 and a small-diameter hole portion 526 having a hole diameter smaller than that of the large-diameter hole portion 525 . The small-diameter hole portion 526 is arranged behind the large-diameter hole portion 525 (on the negative side in the X-axis direction). A bushing 529 is fixed to the hole wall surface of the large-diameter hole portion 525 with a bushing fixture 528 or the like. The inner peripheral surface of the bush 529 is in sliding contact with the outer peripheral surface of the second table pin 550 (more specifically, the second large-diameter shaft portion 551). Bush 529 has a role of a stopper. The bushing 529 abuts on the front end face of the second bushing 553 to prevent the second table pin 550 from slipping forward from the table 520 .

A second small-diameter shaft portion 552 is arranged in the small-diameter hole portion 526 so as to be able to move back and forth. The hole diameter of the small-diameter hole portion 526 is smaller than the hole diameter of the large-diameter hole portion 525 . A step surface 527 is formed between the hole wall surface of the small-diameter hole portion 526 and the hole wall surface of the large-diameter hole portion 525 . This step surface 527 has a role of a stopper. The stepped surface 527 abuts on the rear end surface of the second bushing 553 to prevent the second table pin 550 from coming out of the table 520 rearward.

Next, the configuration of the movable mold 820 will be described mainly with reference to FIGS. 4, 6 and 7. FIG. The movable mold 820 has a mold body portion 830 attached to the table 520 and a movable portion 860 that is arranged inside the mold body portion 830 and projects out the molded product. The movable portion 860 is disposed inside the mold main body portion 830 so as to be movable back and forth. The movable portion 860 has a first movable portion 840 and a second movable portion 850 .

The mold main body 830 is formed rotationally symmetrical (for example, 180° rotationally symmetrical) about the rotational center line 520X of the table 520 . The mold main body 830 includes a movable mounting plate 831 attached to the table 520 , a spacer block 835 forming a space 834 in front of the movable mounting plate 831 , and a movable mounting plate 835 fixed to the movable mounting plate 831 via the spacer block 835 . A template 836 and guide pins 839 are included.

A through hole 832 is formed in the movable mounting plate 831 so as to pass through the movable mounting plate 831 in the mold opening/closing direction. The hole diameter of through hole 832 is larger than the diameter of first table pin 540 and the diameter of second table pin 550 . The through-holes 832 are arranged rotationally symmetrically (for example, 180° rotationally symmetrical) about the rotational center line 520X of the table 520 .

Spacer block 835 forms a space 834 between movable mounting plate 831 and movable mold plate 836 . A first ejector plate 841 to be described later and a second ejector plate 851 to be described later are arranged in the space 834 so as to be movable back and forth.

The movable mold plate 836 has a first movable molding surface 821 and a second movable molding surface 822 on the surface facing the fixed mold 810 . The first movable molding surface 821 and the second movable molding surface 822 form part of the wall surface of the first molding part 801 and part of the wall surface of the second molding part 805 in order, respectively.

A plurality (for example, a pair) of the first movable parts 840 are arranged in rotational symmetry (for example, 180° rotational symmetry) about the rotation center line 520X of the table 520 . Both the first runner molded product 23 and the second runner molded product 27 can be protruded by the first movable part 840 . The first movable portion 840 includes, for example, a first ejector plate 841 arranged perpendicular to the mold opening/closing direction, and a rod-like first ejector pin 844 extending forward from the first ejector plate 841 .

A first ejector plate 841 is positioned in a space 834 between the movable mounting plate 831 and the movable mold plate 836 . The first ejector plate 841 advances and retreats along guide pins 839 parallel to the mold opening/closing direction. The first ejector plate 841 is biased away from the movable mold plate 836 by a first return spring 845 .

The first ejector pin 844 is disposed in a first pin hole penetrating the movable mold plate 836 in the mold opening/closing direction so as to be movable back and forth. A front end surface of the first ejector pin 844 contacts the first runner molded product 23 or the second runner molded product 27 .

Like the first movable part 840 , the second movable part 850 is arranged in a plurality (for example, a pair) in rotational symmetry (for example, 180° rotational symmetry) about the rotation center line 520X of the table 520 . The second movable portion 850 includes, for example, a second ejector plate 851 arranged perpendicular to the mold opening/closing direction, and a bar-shaped second ejector pin 854 extending forward from the second ejector plate 851 .

A second ejector plate 851 is positioned in the space 834 between the movable mounting plate 831 and the movable mold plate 836 . The second ejector plate 851 advances and retreats along guide pins 839 parallel to the mold opening/closing direction. The second ejector plate 851 is biased away from the movable mold plate 836 by a second return spring 855 .

The second ejector plate 851 is arranged behind the first ejector plate 841 . When the second ejector plate 851 advances, the first ejector plate 841 is pushed by the second ejector plate 851 to advance.

A through hole 856 is formed in the second ejector plate 851 so as to penetrate the second ejector plate 851 in the mold opening/closing direction. The hole diameter of through hole 856 is smaller than the diameter of second table pin 550 . The second table pin 550 pushes the second ejector plate 851 forward without passing through the through hole 856 of the second ejector plate 851 .

The hole diameter of the through hole 856 of the second ejector plate 851 is larger than the diameter of the first table pin 540 . The first table pin 540 passes through the through hole 856 of the second ejector plate 851 and pushes the first ejector plate 841 forward.

The second ejector pin 854 is disposed in a second pin hole that penetrates the movable mold plate 836 in the mold opening/closing direction so as to be movable back and forth. A front end surface of the second ejector pin 854 abuts on the first cavity spatial molded product 22 or the second cavity spatial molded product 26 .

Next, the operation of first ejector rod 210 will be described mainly with reference to FIGS. 6 and 7. FIG. The first ejector rod 210 waits behind the table 520 so as not to interfere with the table 520 when the table 520 rotates. After the table 520 rotates, the first ejector rod 210 advances and enters the table 520 to advance the first table pin 540 .

The first ejector rod 210 does not advance the second table pin 550 when advancing the first table pin 540 . The hole diameter of the through hole of the second table pin 550 is larger than the diameter of the first ejector rod 210 . The first ejector rod 210 enters the second table pin 550 and advances the first table pin 540 .

The first table pin 540 passes through the through hole 832 of the movable mounting plate 831 and the through hole 856 of the second ejector plate 851 and pushes the first ejector plate 841 forward. As a result, the first ejector plate 841 advances against the biasing force of the first return spring 845 . Accordingly, the first ejector pin 844 advances to eject the first runner molded product 23 from the mold main body 830 .

While the first ejector plate 841 moves forward, the second ejector plate 851 is held at the retraction limit position by the biasing force of the second return spring 855 and does not move forward. Therefore, when the first runner molded product 23 is projected from the mold body 830 , the first cavity space molded product 22 is not projected from the mold body 830 .

After that, when the first ejector rod 210 is retracted, the first ejector plate 841 is retracted to the retraction limit position by the biasing force of the first return spring 845 . When the first ejector plate 841 reaches the retraction limit position, the front end surface of the first ejector pin 844 becomes flush with the front end surface of the mold main body 830 .

While the first ejector plate 841 is retreating, the first table pin 540 is pushed by the first ejector plate 841 and retreats. When the first ejector plate 841 reaches the retraction limit position, the retraction of the first table pin 540 stops. In this case, the front end of the first table pin 540 remains inside the movable mold 820 .

Note that the first table pin 540 may be biased backward by a spring (not shown) installed inside the table 520 . The front end of the first table pin 540 can be retracted rearward from the movable mold 820 by the biasing force of the spring. Interference between the movable mold 820 and the first table pins 540 can be prevented during mold replacement, and damage to the movable mold 820 or the first table pins 540 can be prevented.

As described above, the first ejector rod 210 waits behind the table 520 so as not to interfere with the table 520 when the table 520 rotates. The first ejector rod 210 advances after the table 520 rotates and enters the inside of the table 520 . The first ejector rod 210 advances the first movable portion 840 via the first table pin 540 to eject the first runner molded product 23 from the mold body portion 830 . The idling distance of the first ejector rod 210 can be shortened by the length of the first table pin 540 . Therefore, the molding cycle can be shortened.

The first table pin 540 advances the first movable portion 840 while the second movable portion 850 is stopped. When ejecting the first runner molded product 23, it is possible to prevent the first cavity space molded product 22 from being ejected together with the first runner molded product 23. - 特許庁Since the first runner molded product 23 is displaced from the first cavity space molded product 22, the first runner molded product 23 and the first cavity space molded product 22 are separated at their boundary. The boundary between the first cavity space molded product 22 and the first runner molded product 23 is formed narrow so that they are easily separated.

The first runner molded product 23 and the first cavity space molded product 22 may be separated before the first runner molded product 23 is projected. For example, when the gate that is the entrance of the first cavity space 802 is a submarine gate, the mold opening separates the first runner molded product 23 and the first cavity space molded product 22 . Since the first runner molded product 23 does not pull the first cavity space molded product 22 when the first runner molded product 23 protrudes, the first cavity space molded product 22 is not deformed. Therefore, deterioration in quality of the first cavity spatial molded product 22 can be suppressed.

Next, the operation of the second ejector rod 220 will be described mainly with reference to FIGS. 6 and 7. FIG. The second ejector rod 220 waits behind the table 520 so as not to interfere with the table 520 when the table 520 rotates. The second ejector rod 220 advances after the table 520 rotates, enters the inside of the table 520 and advances the second table pin 550 .

The second ejector rod 220 pushes the edge of the through hole forward without entering the through hole of the second table pin 550 to advance the second table pin 550 . The hole diameter of the through hole of the second table pin 550 is smaller than the diameter of the second ejector rod 220 .

The second table pin 550 passes through the through hole 832 of the movable mounting plate 831 and pushes forward the edge of the through hole 856 of the second ejector plate 851 . As a result, the second ejector plate 851 moves forward against the biasing force of the second return spring 855 . Accordingly, the second ejector pin 854 advances to eject the second cavity space molded product 26 from the mold main body 830 .

While the second ejector plate 851 advances, the first ejector plate 841 advances by being pushed by the second ejector plate 851 . The first ejector plate 841 moves forward against the biasing force of the first return spring 845 . As a result, the first ejector pin 844 advances to eject the second runner molded product 27 from the mold main body 830 .

After that, when the second ejector rod 220 is retracted, the second ejector plate 851 is retracted to the retraction limit position by the biasing force of the second return spring 855 . When the second ejector plate 851 reaches the retraction limit position, the front end surface of the second ejector pin 854 becomes flush with the front end surface of the mold main body 830 .

While the second ejector plate 851 is retreating, the second table pin 550 is pushed by the second ejector plate 851 and retreats. When the second ejector plate 851 reaches the retraction limit position, the retraction of the second table pin 550 stops. In this case, the front end of the second table pin 550 remains inside the movable mold 820 .

The second table pin 550 may be biased backward by a spring (not shown) installed inside the table 520 . The front end of the second table pin 550 can be retracted rearward from the movable mold 820 by the biasing force of the spring. Interference between the movable mold 820 and the second table pin 550 can be prevented during mold replacement, and damage to the movable mold 820 or the second table pin 550 can be prevented.

While the second ejector plate 851 is retracting, the first ejector plate 841 is retracted to the retraction limit position by the biasing force of the first return spring 845 . When the first ejector plate 841 reaches the retraction limit position, the front end surface of the first ejector pin 844 becomes flush with the front end surface of the mold main body 830 .

As described above, the second ejector rod 220 waits behind the table 520 so as not to interfere with the table 520 when the table 520 rotates. The second ejector rod 220 advances after the table 520 rotates and enters the inside of the table 520 . The second ejector rod 220 advances the second movable portion 850 via the second table pin 550 to eject the second cavity space molded product 26 from the mold body portion 830 . The idling distance of the second ejector rod 220 can be shortened by the length of the second table pin 550 . Therefore, the molding cycle can be shortened.

The second table pin 550 advances the first movable portion 840 together with the second movable portion 850 . When ejecting the second cavity space molded product 26 , the second runner molded product 27 is ejected together with the second cavity space molded product 26 . It is possible to prevent the second cavity space molded product 26 from shifting with respect to the second runner molded product 27 . Since the second runner molded product 27 does not pull the second cavity spatial molded product 26, the second cavity spatial molded product 26 does not deform. Quality deterioration of the second cavity space molded product 26 can be suppressed. The second runner molded product 27 is separated from the second cavity spatial molded product 26 after being ejected together with the second cavity spatial molded product 26 .

The second runner molded product 27 and the first runner molded product 23 are protruded by the same movable part (specifically, the first movable part 840) which is disposed inside the mold main body part 830 so as to move back and forth. The number of parts constituting the movable mold 820 can be reduced, and the structure of the movable mold 820 can be simplified.

The second table pin 550 may advance the second movable portion 850, and may advance the second movable portion 850 while the first movable portion 840 is stopped. In other words, the second runner molded product 27 does not have to protrude together with the second cavity space molded product 26 . In this case, the second cavity space molded product 26 and the second runner molded product 27 may be separated before the second cavity space molded product 26 protrudes.

For example, if the gate that is the entrance of the second cavity space 806 is a submarine gate, the second cavity space molded product 26 and the second runner molded product 27 are separated by opening the mold. Since the second cavity space molded product 26 is not pulled by the second runner molded product 27 when the second cavity space molded product 26 protrudes, the second cavity space molded product 26 does not deform. Therefore, deterioration in quality of the second cavity spatial molded product 26 can be suppressed.

As described above, the ejector device 200 causes the table pin 560 to advance and retract the movable portion 860 that is arranged inside the mold body portion 830 and ejects the molded product. Therefore, the idle running distance of the ejector rod can be shortened by the length of the table pin 560, and the molding cycle can be shortened. In addition, the projecting position of the movable portion 860 in the first molding portion 801 and the projecting position of the movable portion 860 in the second molding portion 805 are different. The projecting position of the movable part 860 is the position at which the molded product is projected from the mold main body part 830 of the movable part 860 . The protruding position of the movable portion 860 can be changed between the first molding portion 801 and the second molding portion 805 . Therefore, different objects can be protruded from the mold main body 830 by the first molding portion 801 and the second molding portion 805 .

The movable portion 860 has a first movable portion 840 and a second movable portion 850 . The ejector device 200 pushes the first movable portion 840 at the first forming portion 801 and pushes the second movable portion 850 at the second forming portion 805 . The position at which the first movable part 840 protrudes the molded product from the mold main body 830 is different from the position at which the second movable part 850 projects the molded product from the mold main body 830 . The protruding position of the movable portion 860 can be changed between the first molding portion 801 and the second molding portion 805 . Therefore, different objects can be protruded from the mold main body 830 by the first molding portion 801 and the second molding portion 805 .

The table pin 560 has a first table pin 540 that pushes the first movable portion 840 and a second table pin 550 that pushes the second movable portion 850 . The first table pin 540 advances the first movable portion 840 to project the first runner molded product 23 from the mold body portion 830 in the first molding portion 801 . The second table pin 550 protrudes the second cavity space molded product 26 from the mold main body 830 in the second molding section 805 by advancing the second movable section 850 .

The first table pin 540 advances the first movable portion 840 while the second movable portion 850 is stopped. The second table pin 550 advances the second movable portion 850 that is not advanced or retracted by the first table pin 540 . The protruding position of the movable portion 860 can be changed between the first molding portion 801 and the second molding portion 805 . Therefore, different objects can be protruded from the mold main body 830 by the first molding portion 801 and the second molding portion 805 .

For example, the molded product protruding from the first molding portion 801 is the first runner molded product 23 and not the first cavity space molded product 22 . On the other hand, the molded product projected from the second molding portion 805 is the second cavity molded product 26 including the first cavity molded product 22 as a part.

It should be noted that the molded product protruding from the first molding portion 801 is not limited to the first runner molded product 23 . For example, the molded product projected from the first molding unit 801 may be a finished product completed by the first molding unit 801, for example, a finished product completed by primary molding. The finished product may be used in combination with the second cavity spatial molded product 26 or may be a product that has nothing to do with the second cavity spatial molded product 26 .

Therefore, the first communication space 803 of the first molded portion 801 is not limited to runners. The first communication space 803 may include a cavity space. In the cavity space, a finished product completed in the first molding section 801, for example, a finished product completed by primary molding is molded. A cavity space for the finished product and a first cavity space 802 are each formed at the branched end of the runner.

In addition to the first table pin 540 and the second table pin 550, the table pin 560 may have a third table pin. The third table pin presses the third movable portion different from the first movable portion 840 and the second movable portion 850, thereby causing the molded article to move at the third molded portion different from the first molded portion 801 and the second molded portion 805. protrudes from the mold main body 830 . The third table pins are arranged rotationally symmetrically (for example, 120° rotationally symmetrical) about the rotational center line 520X of the table 520 .

The third table pin is, for example, arranged coaxially with the first table pin 540 and the second table pin 550 . For example, a third table pin is positioned within first table pin 540 and coaxially with first table pin 540 and second table pin 550 . In this case, the first table pin 540 is formed in a cylindrical shape like the second table pin 550 .

A third table pin may be positioned external to the second table pin 550 and coaxial with the first table pin 540 and the second table pin 550 . In this case, the third table pin is cylindrically formed like the second table pin 550, and the second table pin 550 is arranged inside the cylindrical third table pin.

The third table pin, for example, does not project the primary molded product molded in the third cavity space of the third molding section, but projects the solidified molded product together with the primary molded product. The first table pin 540 does not push out the secondary molded product, which is the first cavity space molded product 22, but pushes out the molded product solidified together with the secondary molded product. The second table pin 550 protrudes the tertiary molded product which is the second cavity spatial molded product 26 .

Incidentally, the third table pin may protrude the tertiary molded product molded in the third cavity space of the third molding portion. In this case, the first table pin 540 does not push out the primary molded product, which is the first cavity space molded product 22, but pushes out the molded product solidified together with the primary molded product. The second table pin 550 does not push out the secondary molded product, which is the second cavity space molded product 26, but pushes out the molded product solidified together with the secondary molded product. A third table pin then protrudes the tertiary molded product.

When the third table pin protrudes the tertiary molded product through the third movable portion, the second table pin 550 advances and retreats the second movable portion 850 while the third movable portion is stopped. The second movable part 850 ejects the solidified molding together with the secondary molding without ejecting the secondary molding. The secondary molded product rotates 120° together with the mold main body 830 without being projected from the mold main body 830 . After that, mold clamping is performed, and the secondary molded product is arranged in a part of the third cavity space.

A fourth table pin may be arranged inside the table 520 in addition to the first table pin 540, the second table pin 550, and the third table pin. The number of table pins is not particularly limited.

(First modification)
FIG. 8 is a diagram showing the state of the mold apparatus during mold clamping when the rotation angle of the table according to the first modification is 180°. FIG. 9 is a cross-sectional view showing the state of the mold apparatus when the table rotation angle is 180° and mold opening is completed according to the first modification. 10 is an enlarged view of a part of FIG. 9. FIG. Differences between this modified example and the above-described embodiment will be mainly described below.

The injection molding machine 10 has a first table pin 540 . The first table pin 540 is arranged inside the table 520 so as to move back and forth in the mold opening/closing direction. Specifically, the first table pin 540 is disposed in the first table through-hole 524A so as to move forward and backward in the mold opening/closing direction.

The first table through-hole 524A penetrates the table 520 (specifically, the mold mounting portion 521 and the disk portion 522, for example) in the mold opening/closing direction. A plurality of first table through-holes 524A are arranged rotationally symmetrically (for example, 180° rotationally symmetrical) around the rotation center line 520X of the table 520 . A first table pin 540 is arranged in each of the plurality of first table through holes 524A.

The first table pin 540 rotates together with the table 520 . A plurality of first table pins 540 are arranged rotationally symmetrically (for example, 180° rotationally symmetrical) around the rotation center line 520X of the table 520 .

The injection molding machine 10 also has a second table pin 550 . The second table pin 550 is arranged inside the table 520 so as to move back and forth in the mold opening/closing direction. Specifically, the second table pin 550 is disposed in the second table through-hole 524B so as to move forward and backward in the mold opening/closing direction.

The second table through-hole 524B penetrates the table 520 (specifically, the mold mounting portion 521 and the disk portion 522, for example) in the mold opening/closing direction. A plurality of second table through-holes 524B are arranged rotationally symmetrically (for example, 180° rotationally symmetrical) about the rotational center line 520X of the table 520 . A second table pin 550 is arranged in each of the plurality of second table through holes 524B.

The second table pin 550 rotates together with the table 520 . A plurality of second table pins 550 are arranged rotationally symmetrically (for example, 180° rotationally symmetrical) about the rotation center line 520X of the table 520 .

The first table pin 540 and the second table pin 550 are spaced apart in a direction perpendicular to the mold opening/closing direction, and are relatively movable back and forth. Since the first table pin 540 is arranged outside the second table pin 550, the structure of the second table pin 550 can be simplified, and the manufacturing cost of the second table pin 550 can be reduced. Further, since the first table pin 540 is positioned outside the second table pin 550, the same structure as the first table pin 540 can be adopted as the structure of the second table pin 550. FIG. Therefore, parts can be shared and the cost can be reduced.

The first table pin 540 coaxially has a first large-diameter shaft portion 541 and a first small-diameter shaft portion 542 having a smaller diameter than the first large-diameter shaft portion 541, as shown in FIG. The first small-diameter shaft portion 542 is arranged behind the first large-diameter shaft portion 541 (on the negative side in the X-axis direction). A first bushing 543 having an outer diameter larger than that of the first large-diameter shaft portion 541 is fixed to the first small-diameter shaft portion 542 . The outer peripheral surface of the first bushing 543 is in sliding contact with the hole wall surface of the first table through-hole 524A (more specifically, the first large-diameter hole portion 525A, which will be described later).

The first table through-hole 524A coaxially has a first large-diameter hole portion 525A and a first small-diameter hole portion 526A having a hole diameter smaller than that of the first large-diameter hole portion 525A. The first small-diameter hole portion 526A is arranged behind the first large-diameter hole portion 525A (on the negative side in the X-axis direction). A bushing 529A is fixed to the hole wall surface of the first large-diameter hole portion 525A by a bushing fixture 528A or the like. The inner peripheral surface of the bush 529A is in sliding contact with the outer peripheral surface of the first table pin 540 (more specifically, the first large diameter shaft portion 541). Bush 529A has a role of a stopper. The bushing 529A abuts on the front end face of the first bushing 543 to prevent the first table pin 540 from slipping out of the table 520 forward.

A first small-diameter shaft portion 542 is disposed in the first small-diameter hole portion 526A so as to be able to move back and forth. The hole diameter of the first small-diameter hole portion 526A is smaller than the hole diameter of the first large-diameter hole portion 525A. A step surface 527A is formed between the hole wall surface of the first small-diameter hole portion 526A and the hole wall surface of the first large-diameter hole portion 525A. This step surface 527A has a role of a stopper. The step surface 527A abuts on the rear end surface of the first bushing 543 to prevent the first table pin 540 from coming out of the table 520 rearward.

The second table pin 550 coaxially has a second large-diameter shaft portion 551 and a second small-diameter shaft portion 552 having a smaller diameter than the second large-diameter shaft portion 551 . The second small-diameter shaft portion 552 is arranged behind the second large-diameter shaft portion 551 (on the negative side in the X-axis direction). A second bushing 553 having an outer diameter larger than that of the second large-diameter shaft portion 551 is fixed to the second small-diameter shaft portion 552 . The outer peripheral surface of the second bushing 553 is in sliding contact with the hole wall surface of the second table through-hole 524B (more specifically, the second large-diameter hole portion 525B described later).

The second table through-hole 524B coaxially has a second large-diameter hole portion 525B and a second small-diameter hole portion 526B having a hole diameter smaller than that of the second large-diameter hole portion 525B. The second small-diameter hole portion 526B is arranged behind the second large-diameter hole portion 525B (on the negative side in the X-axis direction). A bushing 529B is fixed to the hole wall surface of the second large-diameter hole portion 525B by a bushing fixture 528B or the like. The inner peripheral surface of the bush 529B is in sliding contact with the outer peripheral surface of the second table pin 550 (more specifically, the second large diameter shaft portion 551). Bush 529B has a role of a stopper. The bushing 529B abuts on the front end face of the second bushing 553 to prevent the second table pin 550 from slipping out of the table 520 forward.

A second small-diameter shaft portion 552 is disposed in the second small-diameter hole portion 526B so as to be able to move back and forth. The hole diameter of the second small-diameter hole portion 526B is smaller than the hole diameter of the second large-diameter hole portion 525B. A step surface 527B is formed between the hole wall surface of the second small-diameter hole portion 526B and the hole wall surface of the second large-diameter hole portion 525B. This step surface 527B has a role of a stopper. The step surface 527B abuts on the rear end surface of the second bushing 553 to prevent the second table pin 550 from coming out of the table 520 rearward.

Next, the configuration of the movable mold 820 will be described. The movable mold 820 has a mold body portion 830 attached to the table 520 and a movable portion 860 that is arranged inside the mold body portion 830 and projects out the molded product. The movable portion 860 is disposed inside the mold main body portion 830 so as to be movable back and forth. The movable portion 860 has a first movable portion 840 and a second movable portion 850 .

The first movable portion 840 includes, for example, a first ejector plate 841 arranged perpendicular to the mold opening/closing direction, and a rod-like first ejector pin 844 extending forward from the first ejector plate 841 . A first ejector plate 841 is positioned in a space 834 between the movable mounting plate 831 and the movable mold plate 836 .

The second movable portion 850 includes, for example, a second ejector plate 851 arranged perpendicular to the mold opening/closing direction, and a bar-shaped second ejector pin 854 extending forward from the second ejector plate 851 . A second ejector plate 851 is positioned in the space 834 between the movable mounting plate 831 and the movable mold plate 836 . The second ejector plate 851 and the first ejector plate 841 are arranged side by side in a direction perpendicular to the mold opening/closing direction.

The first movable portion 840 of this modified example has a member 842 that wraps around from the first ejector plate 841 to the front of the second ejector plate 851 . When the second ejector plate 851 is advanced, the member 842 may be pushed by the second ejector plate 851 to advance the first ejector plate 841 .

Next, the operation of first ejector rod 210 will be described. The first ejector rod 210 waits behind the table 520 so as not to interfere with the table 520 when the table 520 rotates. After the table 520 rotates, the first ejector rod 210 advances and enters the table 520 to advance the first table pin 540 .

The first ejector rod 210 does not advance the second table pin 550 when advancing the first table pin 540 . Since the first table pin 540 and the second table pin 550 are spaced apart in the direction perpendicular to the mold opening/closing direction, the second table pin 550 is not pushed by the first ejector rod 210 .

The first table pin 540 passes through the first through hole 832A of the movable mounting plate 831 and pushes the first ejector plate 841 forward. As a result, the first ejector plate 841 advances against the biasing force of the first return spring 845 . Accordingly, the first ejector pin 844 advances to eject the first runner molded product 23 from the mold main body 830 .

While the first ejector plate 841 moves forward, the second ejector plate 851 is held at the retraction limit position by the biasing force of the second return spring 855 and does not move forward. Therefore, when the first runner molded product 23 is projected from the mold body 830 , the first cavity space molded product 22 is not projected from the mold body 830 .

After that, when the first ejector rod 210 is retracted, the first ejector plate 841 is retracted to the retraction limit position by the biasing force of the first return spring 845 . When the first ejector plate 841 reaches the retraction limit position, the front end surface of the first ejector pin 844 becomes flush with the front end surface of the mold main body 830 .

While the first ejector plate 841 is retreating, the first table pin 540 is pushed by the first ejector plate 841 and retreats. When the first ejector plate 841 reaches the retraction limit position, the retraction of the first table pin 540 stops. In this case, the front end of the first table pin 540 remains inside the movable mold 820 .

Note that the first table pin 540 may be biased backward by a spring (not shown) installed inside the table 520 . The front end of the first table pin 540 can be retracted rearward from the movable mold 820 by the biasing force of the spring. Interference between the movable mold 820 and the first table pins 540 can be prevented during mold replacement, and damage to the movable mold 820 or the first table pins 540 can be prevented.

Next, the operation of the second ejector rod 220 is described. The second ejector rod 220 waits behind the table 520 so as not to interfere with the table 520 when the table 520 rotates. The second ejector rod 220 advances after the table 520 rotates, enters the inside of the table 520 and advances the second table pin 550 .

The second ejector rod 220 does not advance the first table pin 540 when advancing the second table pin 550 . Since the first table pin 540 and the second table pin 550 are spaced apart in the direction perpendicular to the mold opening/closing direction, the first table pin 540 is not pushed by the second ejector rod 220 .

The second table pin 550 passes through the second through hole 832B of the movable mounting plate 831 and pushes the second ejector plate 851 forward. As a result, the second ejector plate 851 moves forward against the biasing force of the second return spring 855 . Accordingly, the second ejector pin 854 advances to eject the second cavity space molded product 26 from the mold main body 830 .

While the second ejector plate 851 advances, the first ejector plate 841 advances by being pushed by the second ejector plate 851 . The first ejector plate 841 moves forward against the biasing force of the first return spring 845 . As a result, the first ejector pin 844 advances to eject the second runner molded product 27 from the mold main body 830 .

After that, when the second ejector rod 220 is retracted, the second ejector plate 851 is retracted to the retraction limit position by the biasing force of the second return spring 855 . When the second ejector plate 851 reaches the retraction limit position, the front end surface of the second ejector pin 854 becomes flush with the front end surface of the mold main body 830 .

While the second ejector plate 851 is retracting, the first ejector plate 841 is retracted to the retraction limit position by the biasing force of the first return spring 845 . When the first ejector plate 841 reaches the retraction limit position, the front end surface of the first ejector pin 844 becomes flush with the front end surface of the mold main body 830 .

While the second ejector plate 851 is retreating, the second table pin 550 is pushed by the second ejector plate 851 and retreats. When the second ejector plate 851 reaches the retraction limit position, the retraction of the second table pin 550 stops. In this case, the front end of the second table pin 550 remains inside the movable mold 820 .

The second table pin 550 may be biased backward by a spring (not shown) installed inside the table 520 . The front end of the second table pin 550 can be retracted rearward from the movable mold 820 by the biasing force of the spring. Interference between the movable mold 820 and the second table pin 550 can be prevented during mold replacement, and damage to the movable mold 820 or the second table pin 550 can be prevented.

In this modification, when the second ejector plate 851 is advanced, the member 842 is pushed by the second ejector plate 851 to advance the first ejector plate 841, but the present invention is not limited to this. Without the member 842, while the second ejector plate 851 advances, the first ejector plate 841 is held at the retraction limit position by the biasing force of the first return spring 845 and does not advance. The second runner molded product 27 is not projected from the mold body 830 when the second cavity space molded product 26 is projected from the mold body 830 .

As described above, in this modification, as in the above-described embodiment, the ejector device 200 advances and retracts the movable portion 860 arranged inside the mold body portion 830 for ejecting the molded product by the table pin 560. . Therefore, the idle running distance of the ejector rod can be shortened by the length of the table pin 560, and the molding cycle can be shortened. In addition, the projecting position of the movable portion 860 in the first molding portion 801 and the projecting position of the movable portion 860 in the second molding portion 805 are different. The projecting position of the movable part 860 is the position at which the molded product is projected from the mold main body part 830 of the movable part 860 . The protruding position of the movable portion 860 can be changed between the first molding portion 801 and the second molding portion 805 . Therefore, different objects can be protruded from the mold main body 830 by the first molding portion 801 and the second molding portion 805 .

Also in this modified example, the movable portion 860 has a first movable portion 840 and a second movable portion 850 as in the above embodiment. The ejector device 200 pushes the first movable portion 840 at the first forming portion 801 and pushes the second movable portion 850 at the second forming portion 805 . The position at which the first movable part 840 protrudes the molded product from the mold main body 830 is different from the position at which the second movable part 850 projects the molded product from the mold main body 830 . The protruding position of the movable portion 860 can be changed between the first molding portion 801 and the second molding portion 805 . Therefore, different objects can be protruded from the mold main body 830 by the first molding portion 801 and the second molding portion 805 .

In this modified example, similarly to the above embodiment, the table pin 560 has a first table pin 540 that pushes the first movable portion 840 and a second table pin 550 that pushes the second movable portion 850 . The first table pin 540 advances the first movable portion 840 to project the first runner molded product 23 from the mold body portion 830 in the first molding portion 801 . The second table pin 550 protrudes the second cavity space molded product 26 from the mold main body 830 in the second molding section 805 by advancing the second movable section 850 .

Also in this modified example, the first table pin 540 advances the first movable portion 840 while the second movable portion 850 is stopped, as in the above embodiment. The second table pin 550 advances the second movable portion 850 that is not advanced or retracted by the first table pin 540 . The protruding position of the movable portion 860 can be changed between the first molding portion 801 and the second molding portion 805 . Therefore, different objects can be protruded from the mold main body 830 by the first molding portion 801 and the second molding portion 805 .

For example, the molded product protruding from the first molding portion 801 is the first runner molded product 23 and not the first cavity space molded product 22 . On the other hand, the molded product projected from the second molding portion 805 is the second cavity molded product 26 including the first cavity molded product 22 as a part.

It should be noted that the molded product protruding from the first molding portion 801 is not limited to the first runner molded product 23 . For example, the molded product projected from the first molding unit 801 may be a finished product completed by the first molding unit 801, for example, a finished product completed by primary molding. The finished product may be used in combination with the second cavity spatial molded product 26 or may be a product that has nothing to do with the second cavity spatial molded product 26 .

Therefore, the first communication space 803 of the first molded portion 801 is not limited to runners. The first communication space 803 may include a cavity space. In the cavity space, a finished product completed in the first molding section 801, for example, a finished product completed by primary molding is molded. A cavity space for the finished product and a first cavity space 802 are each formed at the branched end of the runner.

Also in this modified example, the table pin 560 may have a third table pin in addition to the first table pin 540 and the second table pin 550 . The third table pin, for example, is spaced apart from the first table pin 540 and the second table pin 550 in the direction perpendicular to the mold opening/closing direction.

(Second modification)
FIG. 11 is a diagram showing the state of the mold apparatus during mold clamping when the rotation angle of the table according to the second modification is 180°. FIG. 12 is a cross-sectional view showing the state of the mold apparatus when the table rotation angle is 180° and mold opening is completed according to the second modification. 13 is an enlarged view of a part of FIG. 12. FIG. Differences between this modified example and the first modified example will be mainly described below.

The injection molding machine 10 has a table pin 560 . The table pin 560 of this modified example has the functions of both the first table pin 540 and the second table pin 550 of the first modified example. The table pin 560 is arranged inside the table 520 such that its position relative to the movable portion 860 can be changed. The table pin 560 changes its position relative to the movable part 860 in a direction orthogonal to the mold opening/closing direction.

The injection molding machine 10 has a displacement mechanism 570 that changes the position of the table pin 560 with respect to the movable portion 860 . A plurality of displacement mechanisms 570 are provided corresponding to a plurality of table pins 560 . The position of the table pin 560 with respect to the movable portion 860 can be changed for each table pin 560 .

The displacement mechanism 570 moves the position of the table pin 560 with respect to the movable portion 860 between a position where the first movable portion 840 is advanced and retreated while the second movable portion 850 is stopped, and a position where the second movable portion 850 is advanced and retreated. change. The displacement mechanism 570 has a holder 580 and a holder moving mechanism 590, for example.

The holder 580 holds the table pin 560 so as to move back and forth in the mold opening/closing direction. A holder through hole 581 is formed in the holder 580 so as to pass through the holder 580 in the mold opening/closing direction. A table pin 560 is arranged in the holder through-hole 581 so as to be movable back and forth.

As shown in FIG. 13, the table pin 560 coaxially has a large-diameter shaft portion 561 and a small-diameter shaft portion 562 having a smaller diameter than the large-diameter shaft portion 561 . The small-diameter shaft portion 562 is arranged behind the large-diameter shaft portion 561 (on the negative side in the X-axis direction). A first bushing 563 having an outer diameter larger than that of the large-diameter shaft portion 561 is fixed to the small-diameter shaft portion 562 . The outer peripheral surface of the first bushing 563 is in sliding contact with the hole wall surface of the holder through-hole 581 (more specifically, the large-diameter hole portion 582 described later).

The holder through-hole 581 coaxially has a large-diameter hole portion 582 and a small-diameter hole portion 583 having a hole diameter smaller than that of the large-diameter hole portion 582 . The small-diameter hole portion 583 is arranged behind the large-diameter hole portion 582 (on the negative side in the X-axis direction). A second bush 586 is fixed to the hole wall surface of the large-diameter hole portion 582 with a bush fixture 585 or the like. The inner peripheral surface of the second bushing 586 makes sliding contact with the outer peripheral surface of the table pin 560 (more specifically, the large diameter shaft portion 561). The second bushing 586 has a role of a stopper. The second bushing 586 abuts on the front end face of the first bushing 563 to prevent the table pin 560 from slipping forward from the holder 580 , and thus the table pin 560 from slipping forward from the table 520 .

A small-diameter shaft portion 562 is arranged in the small-diameter hole portion 583 so as to be able to move back and forth. The hole diameter of the small-diameter hole portion 583 is smaller than the hole diameter of the large-diameter hole portion 582 . A step surface 584 is formed between the hole wall surface of the small-diameter hole portion 583 and the hole wall surface of the large-diameter hole portion 582 . This step surface 584 has a role of a stopper. The stepped surface 584 abuts on the rear end surface of the first bushing 563 to prevent the table pin 560 from coming out of the holder 580 to the rear, and furthermore, to stop the table pin 560 from coming out of the table 520 to the rear.

A holder moving mechanism 590 moves the holder 580 with respect to the table 520 . The moving direction is, for example, a direction orthogonal to the mold opening/closing direction. The holder moving mechanism 590 is composed of a fluid pressure cylinder such as a hydraulic cylinder or a pneumatic cylinder. A rotary motor and a motion conversion mechanism that converts the rotary motion of the rotary motor into linear motion of the holder 580 may be used instead of the fluid pressure cylinder.

Although the displacement mechanism 570 of this embodiment has the holder 580 and the holder moving mechanism 590, the configuration of the displacement mechanism 570 is not particularly limited. For example, instead of the holder moving mechanism 590, the displacement mechanism 570 may have a holder turning mechanism, which will be described later.

The holder turning mechanism turns the holder 580 with respect to the table 520 . The rotation centerline of holder 580 is offset from rotation centerline 520X of table 520 and parallel to rotation centerline 520X of table 520 .

The holder rotating mechanism, for example, turns one holder 580 around one turning centerline. Note that the holder rotation mechanism may rotate the plurality of holders 580 around one rotation center line.

Since the configuration of the movable mold 820 and the configuration of the ejector device 200 are the same as those of Modification 1, description thereof will be omitted.

The first ejector rod 210 advances after the table 520 rotates and enters the inside of the table 520 . The first ejector rod 210 advances the first movable portion 840 via the table pin 560 to eject the first runner molded product 23 from the mold body portion 830 . The idling distance of the first ejector rod 210 can be shortened by the length of the table pin 560 . Therefore, the molding cycle can be shortened. After ejecting the first runner molded product 23 from the mold main body 830 , the first ejector rod 210 retreats to the rear of the table 520 .

The second ejector rod 220 advances after the table 520 rotates and enters the inside of the table 520 . The second ejector rod 220 ejects the second cavity space molded product 26 from the mold body 830 by advancing the second movable part 850 via the table pin 560 . The idling distance of the second ejector rod 220 can be shortened by the length of the table pin 560 . Therefore, the molding cycle can be shortened. After the second ejector rod 220 ejects the second cavity space molded product 26 from the mold main body 830 , the second ejector rod 220 retreats to the rear of the table 520 .

As described above, in this modification, as in the above-described embodiment, the ejector device 200 advances and retracts the movable portion 860 arranged inside the mold body portion 830 for ejecting the molded product by the table pin 560. . Therefore, the idle running distance of the ejector rod can be shortened by the length of the table pin 560, and the molding cycle can be shortened. In addition, the projecting position of the movable portion 860 in the first molding portion 801 and the projecting position of the movable portion 860 in the second molding portion 805 are different. The projecting position of the movable part 860 is the position at which the molded product is projected from the mold main body part 830 of the movable part 860 . The protruding position of the movable portion 860 can be changed between the first molding portion 801 and the second molding portion 805 . Therefore, different objects can be protruded from the mold main body 830 by the first molding portion 801 and the second molding portion 805 .

Also in this modified example, the movable portion 860 has a first movable portion 840 and a second movable portion 850 as in the above embodiment. The ejector device 200 pushes the first movable portion 840 at the first forming portion 801 and pushes the second movable portion 850 at the second forming portion 805 . The protruding position of the first movable part 840 and the protruding position of the second movable part 850 are different. The protruding position of the movable portion 860 can be changed between the first molding portion 801 and the second molding portion 805 . Therefore, different objects can be protruded from the mold main body 830 by the first molding portion 801 and the second molding portion 805 .

The table pin 560 is arranged inside the table 520 such that its position relative to the movable portion 860 can be changed. The table pin 560 is arranged inside the table 520 so as to be movable between a first position that pushes the first movable portion 840 and a second position that pushes the second movable portion 850 . By advancing the first movable portion 840 , the table pin 560 protrudes the first runner molded product 23 from the mold body portion 830 in the first molding portion 801 . Further, the table pin 560 projects the second cavity space molded product 26 from the mold main body 830 in the second molding portion 805 by advancing the second movable portion 850 .

The table pin 560 advances the first movable portion 840 while the second movable portion 850 is stopped. Also, the table pin 560 advances the second movable portion 850 . The protruding position of the movable portion 860 can be changed between the first molding portion 801 and the second molding portion 805 . Therefore, different objects can be protruded from the mold main body 830 by the first molding portion 801 and the second molding portion 805 .

For example, the molded product protruding from the first molding portion 801 is the first runner molded product 23 and not the first cavity space molded product 22 . On the other hand, the molded product projected from the second molding portion 805 is the second cavity molded product 26 including the first cavity molded product 22 as a part.

It should be noted that the molded product protruding from the first molding portion 801 is not limited to the first runner molded product 23 . For example, the molded product projected from the first molding unit 801 may be a finished product completed by the first molding unit 801, for example, a finished product completed by primary molding. The finished product may be used in combination with the second cavity spatial molded product 26 or may be a product that has nothing to do with the second cavity spatial molded product 26 .

Therefore, the first communication space 803 of the first molded portion 801 is not limited to runners. The first communication space 803 may include a cavity space. In the cavity space, a finished product completed in the first molding section 801, for example, a finished product completed by primary molding is molded. A cavity space for the finished product and a first cavity space 802 are each formed at the branched end of the runner.

The table pin 560 of this modified example has the functions of both the first table pin 540 and the second table pin 550 of the first modified example, but may also have the function of the third table pin. . In this case, the displacement mechanism 570 changes the relative position of the table pin with respect to the table 520 in the mold opening/closing direction among the following three positions. One position is a position where the first movable portion 840 is advanced and retracted while the second movable portion 850 and the third movable portion are stopped. Another position is a position where the second movable portion 850 is advanced and retracted while the third movable portion is stopped. The remaining one position is a position for advancing and retracting the third movable portion.

In this modified example, the table pin 560 is displaced to change the relative position between the table pin 560 and the movable portion 860, but the movable portion 860 may be displaced, or both the table pin 560 and the movable portion 860 may be may be displaced. In other words, the movable portion 860 may be arranged inside the mold main body portion 830 such that its position relative to the table pin 560 can be changed. For example, the movable part 860 may have an ejector plate that is displaceable between a position that pushes the first ejector pin 844 and a position that pushes the second ejector pin 854 .

(Other modifications, etc.)
Although the embodiments and the like of the injection molding machine have been described above, the present invention is not limited to the above embodiments and the like. Various changes, modifications, substitutions, additions, deletions, and combinations are possible within the scope of the claims. These also naturally belong to the technical scope of the present invention.

For example, the mold clamping devices 100 of the above-described embodiment, the first modified example, and the second modified example are horizontal types in which the mold opening/closing direction is horizontal, but the present invention is not limited to this. The mold clamping device 100 may be of a vertical type in which the mold opening/closing direction is vertical. When the mold clamping device 100 is of a vertical type, the lower mold is attached to the table 520, and the table 520 is rotatably attached to the lower platen. A rotation center line 520X of the table 520 is parallel to the vertical direction. An upper platen is arranged above the lower platen, and an upper die is attached to the upper platen. The upper platen is the movable platen and the upper mold is the movable mold. Also, the lower platen is a stationary platen, and the lower die is a stationary die.

Moreover, although the table 520 in the above embodiment is rotatably attached to the movable platen 120, the present invention is not limited to this. Table 520 may be slidably attached to movable platen 120 . The slide direction is a direction perpendicular to the mold opening/closing direction. When the mold clamping device 100 is of a vertical type, the table 520 is slidably attached to the lower platen.

When the mold clamping device 100 is of horizontal type and the table 520 is slidably attached to the movable platen 120 , the first table pin 540 and the second table pin 550 slide together with the table 520 . Moreover, when the mold clamping device 100 is of a horizontal type and the table 520 is slidably attached to the movable platen 120 , the table pin 560 slides together with the table 520 .

Similarly, when the mold clamping device 100 is vertical and the table 520 is slidably attached to the lower platen, the first table pin 540 and the second table pin 550 slide together with the table 520 . Moreover, when the mold clamping device 100 is of a vertical type and the table 520 is slidably attached to the lower platen, the table pins 560 slide together with the table 520 .

10 Injection molding machine 21 First molded product 22 First cavity space molded product 23 First communicating space molded product 25 Second molded product 26 Second cavity space molded product 27 Second communicating space molded product 100 Mold clamping device 120 Movable platen ( platen)
520 table 520X rotation center line 540 first table pin 550 second table pin 560 table pin 800 mold device 801 first molding section 802 first cavity space 803 first communication space 805 second molding section 806 second cavity space 807 Two communication spaces 820 Movable mold (mold)
830 mold main body 840 first movable part 850 second movable part 860 movable part

Claims (5)

a table on which the mold main body is attached;
a platen to which the table is rotatably and/or slidably mounted;
a table pin disposed inside the table and rotating with the table;
an ejector device that advances a movable part that is disposed inside the mold main body and ejects a molded product forward by the table pin in a direction in which the molded product is ejected,
The mold main body forms a first molding part that molds a first molded product, and a second molding part that molds a second molded product that includes the first molded product as a part,
The movable section has a first movable section and a second movable section,
The table pin has a first table pin that advances the first movable portion while the second movable portion is stopped, and a second table pin that advances the second movable portion,
The ejector device advances the first movable portion by the first table pin without advancing the second table pin in the first molding portion, and advances the first movable portion by the second table pin in the second molding portion. 2 An injection molding machine that advances moving parts . 2. The injection molding machine according to claim 1, wherein said second table pin advances said first movable portion together with said second movable portion. 2. The injection molding machine according to claim 1, wherein said second table pin advances said second movable portion while said first movable portion is stopped. a table on which the mold main body is attached;
a platen to which the table is rotatably and/or slidably mounted;
a table pin disposed inside the table;
an ejector device that advances and retracts a movable part that is arranged inside the mold main body and ejects the molded product by the table pin,
The mold main body forms a first molding part that molds a first molded product, and a second molding part that molds a second molded product that includes the first molded product as a part,
The position where the movable part protrudes in the first molding part and the position where the movable part protrudes in the second molding part are different,
The movable section has a first movable section and a second movable section,
The ejector device pushes the first movable part at the first molding part, pushes the second movable part at the second molding part,
The injection molding machine , wherein the table pin is arranged inside the table such that its position relative to the movable part can be changed . a table on which the mold main body is attached;
a platen to which the table is rotatably and/or slidably mounted;
a table pin disposed inside the table;
an ejector device that advances and retracts a movable part that is arranged inside the mold main body and ejects the molded product by the table pin,
The mold main body forms a first molding part that molds a first molded product, and a second molding part that molds a second molded product that includes the first molded product as a part,
The position where the movable part protrudes in the first molding part and the position where the movable part protrudes in the second molding part are different,
The movable section has a first movable section and a second movable section,
The ejector device pushes the first movable part at the first molding part, pushes the second movable part at the second molding part,
The injection molding machine according to claim 1, wherein the movable section is arranged inside the mold main body so as to be able to change its position with respect to the table pin .

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