JP2001198924A - Method and apparatus for demolding molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for demolding a molding which can remove the molding from a molding mold in a right posture and an apparatus for the method. SOLUTION: A removing device 100 has a removing plate 200 for grasping the molding A. The plate 200 has a guide plate 210, which is two plate-shaped members arranged in parallel to each other, and a support plate 220, and the guide plate 210 is supported elastically by the support plate 220 through a coil spring 221. A chuck claw 231 for holding the runner part R of the solidified molding A is fitted to the support plate 220, and the chuck claw 231 is inserted into an insertion hole 214 formed in the guide plate 210. After the guide plate 210 of the plate 200 is made to face a movable mold plate 6, by ejecting the molding A from the plate 6, the runner part R of the molding A is contacted with the guide plate 210, and in this state, the chuck claw 231 is driven to grasp the runner part R. After that, the plate 200 is moved to an apparatus in the next process, and the molding A is conveyed to an apparatus in the next process.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding apparatus for injecting and solidifying a molding material into a molding die and molding a plurality of moldings of a predetermined shape. The present invention relates to an unloading device used for unloading from a mold.

[0002]

2. Description of the Related Art In general, a molding apparatus is configured to plasticize and fluidize a molding material such as a resin, inject it into a molding die, and solidify the molding material, thereby molding a molding object having a predetermined shape. Inside a molding die (mold), a cavity (cavity) serving as a space in which a molding object is molded, a sprue (sprue) serving as an injection path into which a molding material is injected, and a molding material injected into the sprue are provided. A runner serving as a flow path leading to the cavity is formed.
The compact solidified in the mold has a portion having a shape corresponding to the cavity, runner and sprue of the mold.
After the molded body is removed from the molding die, the molded body is conveyed to an apparatus in the next step, where a portion corresponding to the cavity is cut off from the other portion, thereby obtaining a molded object having a predetermined shape.

[0003] The mold is configured to be separated into two parts, for example, and the molded body can be taken out by separating the mold. When the mold is separated, a portion corresponding to the sprue of the molded body protrudes largely from the separated mold. Therefore,
2. Description of the Related Art Conventionally, when removing a molded body from a mold, a portion corresponding to a sprue of the molding material is gripped by a robot or the like.

[0004]

However, since the portion corresponding to the sprue of the molded body is liable to be deformed such as bending, the portion corresponding to the sprue of the molded body must be gripped. There is a problem that the molded body is not transported in a correct posture and cannot be accurately positioned with respect to the device in the next process.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a method and an apparatus for removing a molded product, which enable the molded product to be removed from a molding die in a correct posture. is there.

[0006]

According to the present invention, there is provided a method for removing a molded article, comprising: a first flow path portion into which a molten molding material is injected; a hollow portion having a shape corresponding to the shape of an object to be molded;
The second guides the molten molding material injected into the flow channel portion into the hollow portion.
Using a molding die having a flow path portion, a molding apparatus for molding an object to be molded, a method for removing a molded body applied to the molding apparatus,
A gripping step of gripping an arm-shaped portion formed corresponding to the second flow path portion, of the molded body including the molding target, which is obtained by injecting and solidifying a molten molding material into a molding die,
Removing the molded body from the mold while holding the arm-shaped portion.

Further, according to the present invention, there is provided a molded body removing apparatus, wherein a first flow path portion into which a molten molding material is injected, a hollow portion having a shape corresponding to the shape of an object to be molded, and a first flow path portion. A molding apparatus for molding a molded body including an object to be molded by using a molding die having a second flow path portion for guiding a molten molding material injected into a cavity to a cavity portion, ,
A molded body obtained by injecting and solidifying a molten molding material into a molding die is provided with a gripping mechanism for gripping an arm-shaped portion formed corresponding to the second flow path portion. It is configured to take out the molded body from the mold while holding the arm-shaped portion.

In the method for removing a molded article according to the present invention or the apparatus for removing a molded article according to the present invention, an arm-shaped portion of the molded article that is unlikely to be bent or deformed is gripped, so that the object to be molded is held in a correct posture. Conveyed.

In the method for removing a molded article according to the present invention, a projecting step of projecting the molded article from the molding die and a positioning step of positioning the arm-shaped portion of the molded article projected from the molding die by contacting the arm with a predetermined guide member. Preferably, in the gripping step, the arm-shaped portion of the molded body is gripped while the arm-shaped portion is in contact with the guide member. In the positioning step, it is preferable that the arm portion of the molded body is elastically pressed against the guide member. Further, in the gripping step, it is preferable that the arm-shaped portion is sandwiched and gripped by at least two gripping members. Further, in a case where the mold has a plurality of hollow portions and a plurality of second flow passage portions, it is preferable that at least two of the plurality of arm portions are gripped in the gripping step.

In the molded product removing device according to the present invention, it is preferable that the gripping mechanism further includes a guide member that abuts on the arm-shaped portion of the molded product. In this case, it is preferable that the gripping mechanism is configured to grip the arm-shaped portion of the molded body while the guide member is in contact with the arm-shaped portion of the molded body. Further, it is preferable that the holding mechanism further includes a support member configured to support the guide member and to urge the guide member in the direction of the molding die. Furthermore,
It is preferable that the gripping mechanism includes at least two gripping members that sandwich and hold the arm-shaped portion of the molded body. Preferably, the gripping mechanism is configured to grip a plurality of arm-shaped portions of the molded body.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS <Structure of Injection Molding Apparatus> FIG.
BRIEF DESCRIPTION OF THE DRAWINGS It is a figure showing the basic structure of the injection molding apparatus to which the molding removal method and molding removal apparatus which concern on embodiment of this invention are applied. The injection molding apparatus 1 includes an injection unit 3 that plasticizes and fluidizes a molding material such as a thermoplastic resin, a mold clamping unit 2 that holds a mold 10 into which the molding material is injected, and a base B that supports these. It is configured. The injection unit 3 has a cylinder 31 which is a cylindrical container made of metal. The cylinder 31 is arranged so that the axial direction is horizontal, and a heater (not shown) is provided around the cylinder 31. The cylinder 3 has a cylinder 3 on its upper surface.
1 is a hopper 32 which is an opening for charging a molding material.
Is provided.

A screw 33 extending parallel to the axial direction of the cylinder 31 is provided inside the cylinder 31 so as to agitate the molding material supplied from the hopper 32 in the cylinder 31. The screw 33 also has a function of feeding the molding material to the mold 10 by moving forward in the axial direction. A nozzle 35 having an inner diameter smaller than the inner diameter of the cylinder 31 is formed at an end of the cylinder 31 on the side of the mold clamping unit 2, and a screw motor for rotating and driving the screw 33 is formed at the opposite end. 34 are attached. That is, the injection unit 3 plasticizes and fluidizes the molding material inside the cylinder 31 by heating a heater (not shown) and rotating the screw 33, and injects the molding material into the mold 10 through the nozzle 35 by advancement of the screw 33. It is supposed to.

The mold 10 is composed of a fixed plate 5 and a movable plate 6 which are two plate members made of metal.
The fixed mold plate 5 and the movable mold plate 6 are configured to face each other on a plane orthogonal to the axial direction of the cylinder 31 of the injection unit 3 described above. On the surfaces of the fixed mold plate 5 and the movable mold plate 6 facing each other, grooves or recesses of a predetermined shape are formed, respectively. When the fixed mold plate 5 and the movable mold plate 6 are combined as shown in FIG. A space 10a into which the molding material is injected is formed in the united surface portion. Here, the mold 10 (the fixed mold plate 5 and the movable mold plate 6) corresponds to a specific example of “mold” in the present invention.

The mold clamping unit 2 includes a fixed surface plate 4 for holding a fixed plate 5 and a movable surface plate 7 for holding a movable plate 6. The fixed surface plate 4 is fixed to the base B, and the movable surface plate 7 has a horizontally extending slide guide 7a,
7b, it is movably supported in a direction approaching and leaving the fixed surface plate 7. The mold clamping device 2 includes a mold clamping cylinder 9 formed of, for example, a hydraulic cylinder for moving the movable platen 7, and the movable platen 7 is fixed to a tip of a plunger portion 91 of the mold clamping cylinder 9. It has become. When the mold clamping cylinder 9 is driven, the movable platen 7 moves horizontally as shown in FIG.
And the movable mold plate 6 are combined and separated. In the following description, the operation of combining the fixed mold plate 5 and the movable mold plate 6 is referred to as “mold closing”, and the operation of separating and separating the fixed mold plate 5 and the movable mold plate 6 is referred to as “mold opening”. A mold clamping position sensor 120 such as a proximity sensor is provided on the base B. When the movable platen 7 is in the open position shown in FIG. Has become.

FIG. 3 is a diagram showing a schematic configuration of the fixed surface plate 4, the fixed mold plate 5, the movable mold plate 6, and the movable surface plate 7. As shown in FIG. Here, the fixed surface plate 4, the fixed mold plate 5, the movable mold plate 6, and the movable surface plate 7 are shown separated from each other. 3, the slide guides 7a and 7b shown in FIG. 1 are omitted. A fixed mold plate 5 is fixed to one surface (the left surface in the figure) of the fixed surface plate 4 by a fixing tool (not shown). On the other surface of the fixed base 4, a mounting ring 40 to which a mounting portion of the injection unit 3 (FIG. 1) is mounted is formed. The fixed base 4 has a nozzle insertion hole 41 through which the nozzle 35 of the injection unit 3 is inserted.

A cross-shaped groove 50 is formed on the surface of the fixed mold plate 5 opposite to the fixed platen 4 side. The four ends of the groove 50 are each branched in a T-shape, and a concave portion 51 having a predetermined shape is formed at each end (eight places) of the branched groove. Each recess 51 is formed slightly apart from the groove 50, and the recess 51 and the groove 50 are
It is communicated by a groove 52 (hereinafter, referred to as a narrow groove) having a width smaller than 0. On the surface of the movable mold plate 6 facing the fixed mold plate 5, a groove 60, a concave portion 61 and a narrow groove 62 having the same shape as the groove 50, the concave portion 51 and the narrow groove 52 are formed.

When the fixed mold plate 5 and the movable mold plate 6 are united, the concave portion 51 and the concave portion 61 form a cavity (ie, a cavity).
A narrow groove 52 and a narrow groove 62 form a gate (that is, a flow path serving as a gate facing the cavity), and a groove 50 and a groove 60 form a runner (that is, a molding material). (A flow path for guiding to the gate). The combined portion of the gate, cavity and runner corresponds to the space 10a in FIG. Since the mold 10 (the fixed mold plate 5 and the movable mold plate 6) has eight cavities, eight molding objects can be obtained by one injection molding process. Where the cavity is
The runner corresponds to one specific example of the “hollow part” in the present invention, and the runner corresponds to one specific example of the “second flow path part” in the present invention.

The fixed mold plate 5 is formed with a through hole 53 penetrating from the surface on the fixed platen 4 side to the surface on the movable mold plate 6 side. The through hole 53 is provided with a taper such that the inner diameter decreases toward the fixed surface plate 4 and increases toward the movable mold plate 6. A sprue bush 55 with which the nozzle 35 of the injection unit 3 is engaged is provided on the surface of the fixed mold plate 5 on the fixed surface plate 4 side.
Is formed, and the nozzle 35 is connected to the sprue bush 55.
, The molding material injected from the nozzle 35 is injected into the through hole 53. This through-hole 53 forms a sprue (that is, an injection port of the molding material). Here, the sprue corresponds to a specific example of the “first flow path unit” in the present invention.

Four L-shaped blocks 71 are fixed to a surface (hereinafter referred to as an attachment surface) 70 of the movable surface plate 7 on which the movable mold plate 6 is attached. These blocks 71 are arranged so as to form four quadrangular corners on the mounting surface 70.
Four guide pins 72 having a columnar shape are formed so as to protrude from an end surface parallel to the above. The movable platen 6 includes a movable platen 7
Four through-holes 65 into which the respective guide pins 72 are fitted are formed at positions corresponding to the four guide pins 72, and the movable mold plate 6 is movable by fitting the guide pins 72 and the through-holes 65. It is adapted to be fixed to the surface plate 7.
In the fixed die plate 5, the guide pins 7 of the movable platen 7
2, four receiving holes 56 into which the four guide pins 72 (through the through holes 65 of the movable die plate 6) are inserted are formed. The inner diameter of the receiving hole 56 is formed to be larger than the outer diameter of the guide pin 72, and the guide pin 72 is inserted into the receiving hole 56 at the time of mold clamping.
The movable table 7 is guided.

An ejector mechanism 8 is provided on the mounting surface 70 side of the movable platen 7 so as to be surrounded by four blocks 71. The ejector mechanism 8 is for projecting the solidified molded body that is in close contact with the movable mold plate 6 and separating it from the movable mold plate 6. The ejector mechanism 8 has an ejector plate 80 that is provided so as to be surrounded by the four blocks 71 and that is made of a metal plate member.

Four return pins 81 as cylindrical members are provided at four corners of the surface of the ejector plate 80 on the movable mold plate 6 side.
And coil springs 82 are provided around the return pins 81, respectively. In the movable plate 6, four through holes 66 having an inner diameter slightly larger than the outer diameter of the coil spring 82 are formed at positions corresponding to the return pins 81. The ejector plate 80 is guided by the through hole 66 and the return pin 81 in a direction to approach and move away from the movable mold plate 6. The end 67 of the through hole 66 on the fixed mold plate 5 side (only one is shown in FIG. 3).
Is smaller than the outer circumference of the coil spring 82, and the end 67 serves as a stopper that comes into contact with the edge of the coil spring 82. That is, the ejector plate 80 is
2 urges the movable mold plate 6 in a direction away from the movable mold plate 6.

On the surface of the ejector plate 80 on the side of the movable mold plate 6, eight core pins 85 are respectively provided at positions corresponding to the eight concave portions 62 of the movable mold plate 6. In addition, one center pin 87 is protrudingly provided at the center of the surface of the ejector plate 80 on the movable mold plate 6 side.

FIG. 4 is a sectional view showing a sectional structure of the fixed surface plate 4, the fixed mold plate 5, the movable mold plate 6, and the movable surface plate 7. As shown in FIG.
In FIG. 4, the upper and lower sides of the center line D represent different cross sections. The ejector plate 80 is formed by laminating two plate members 80a and 80b, and the core pin 85 is fixed to the plate member 80b by a fixing rod 86 provided through the ejector plate 80. I have. The core pin 85 is configured such that a portion on the ejector plate 80 side has a larger outer diameter than a portion on the fixed mold plate 5 side. The ejector plate 80 side of the core pin 85 is a large diameter portion 85a, and the fixed mold plate 5 side is a small diameter portion 85b.

In the movable plate 6, a core pin hole 68 through which the core pin 85 is inserted is formed at a position corresponding to the core pin 85 of the ejector plate 80. The ejector plate 80 side of the core pin hole 68 has an inner diameter of the core pin 85.
Large diameter portion 68a slightly larger than the outer diameter of the large diameter portion 85a
The fixed die plate 5 has a small-diameter portion 68b whose inner diameter is slightly larger than the outer diameter of the small-diameter portion 85b of the core pin 85. The axial length of the small diameter portion 68b of the core pin hole 68 is shorter than the small diameter portion 85b of the core pin 85. That is, the core pin 85 is supported in the core pin hole 68 so as to be movable by a predetermined amount in the axial direction, and when the core pin 85 moves to the fixed mold plate 5 side, as shown in FIG.
Are projected from the movable mold plate 6. On the other hand, when the core pin 85 moves toward the movable platen 7, the tip of the core pin 85 slightly retreats into the core pin hole 68,
Thereby, the concave portion 61 serving as the above-described cavity (FIG. 3)
Is formed.

The fixed mold plate 5 has a core pin hole 58 having the same shape as the core pin hole 68 of the movable mold plate 6. The core pin hole 58 has a large-diameter portion 5 on the fixed surface plate 4 side.
8b, and the movable mold plate 6 side is formed to be the small-diameter portion 58b. A core pin 59 is fixed in the core pin hole 58 of the fixed die plate 5. The tip of the core pin 59 is slightly retracted into the core pin hole 58, whereby the concave portion 52 (FIG. 3) serving as the above-described cavity is formed. The core pins 5 of the fixed die plate 5
9 is a core pin 85 attached to the ejector plate 80.
Unlike, it is not movable. However, the adjuster rod 5 fixing the core pin 59 to the fixed mold plate 5
By adjusting 9a, the core pin 59 can be protruded or retracted.

As shown in FIG. 3, the center pin 87 provided at the center of the ejector plate 80 has a cylindrical shape, and its tip is formed to have a Z shape in side view. . A center pin 87 is provided at the center of the movable mold plate 6.
A center hole 63 having an inner diameter slightly larger than the outer diameter of the movable mold plate 6 is formed at the center of a groove 60 formed on the surface of the movable mold plate 6. The center pin 87 moves in the center hole 63 with the movement of the ejector plate 80, and when the ejector plate 80 moves toward the fixed mold plate 5, the tip of the center pin 87 projects from the movable mold plate 6. I have. Note that the Z-shaped portion at the tip of the center pin 87 is a solidified molded product A when the mold is opened.
(FIG. 5) is to engage with a part of the fixed mold plate 5 to reliably remove the molded body A from the fixed mold plate 5.

An ejector rod 88 for driving the ejector plate 80 is provided on the movable platen 7 side of the ejector plate 80.
Is attached. This ejector rod 88
The ejector motor 302 penetrates the movable platen 7
(FIG. 12), the ejector plate 80 moves in a straight line, and moves the ejector plate 80 in a direction to approach and separate from the movable mold plate 6.

In order to regulate the range of movement of the ejector plate 80, a first stopper 69a is attached to the surface of the movable plate 6 on the side of the ejector plate 80, and a second stopper plate 69b is attached to the movable platen 7. ing. As shown in FIG. 4, when the ejector plate 80 is in contact with the first stopper 69a, the tip of the core pin 85 projects from the movable plate 6 by a predetermined amount. This is defined as a projecting position. When the ejector plate 80 is moved to the projecting position, the core pin 85 and the center pin 87 project from the movable mold plate 6 and project the molded body A from the movable mold plate 6 as schematically shown in FIG. . On the other hand, the ejector 80 is
When in contact with 9b, the core pin 85 and the center pin 87 are retracted inside the movable mold plate 6. The position of the ejector plate 80 at this time is defined as a retracted position.

For detecting the position of the ejector plate 80, a return sensor 110 is provided. The return sensor 110 is
As shown in FIG. 3, a shutter plate 111 attached to the side end surface of the ejector plate 80 and a photo sensor 112 composed of a light emitting element and a light receiving element attached to the surface of the movable platen 7 on the side of the ejector plate 80. It is configured. When the ejector plate 80 is at the retracted position, the return sensor 110 causes the shutter plate 111 to enter between the light emitting element and the light receiving element of the photo sensor 112, and thereby the photo sensor 112 outputs an off signal. Has become.

Here, as shown in FIG.
In addition to the molding object C having a shape corresponding to the cavity of the mold 10 (the concave portion 51 of the fixed mold plate 5 and the concave portion 61 of the movable mold plate 6), the sprue of the mold 10 (the through-hole 5 of the fixed mold plate 5).
The sprue portion S having a shape corresponding to 3), the runner of the mold 10 (the cross groove 50 of the fixed mold plate 5 and the cross groove 6 of the movable mold plate 6).
0) and a gate G having a shape corresponding to the gate (the narrow groove 52 of the fixed mold plate 5 and the narrow groove 62 of the movable mold plate 6).

FIGS. 6 to 9 are perspective views showing the structure of the take-out device 100 according to the present embodiment. Removal device 10
Reference numeral 0 denotes a structure configured to hold and remove the molded body that is in close contact with the movable mold plate 6. As shown in FIG. 6, the unloading device 100 has a column 101 that stands on the upper surface of the fixed base 4 and extends in the vertical direction. A first arm 102 extending horizontally and in a direction X orthogonal to the moving direction Y of the movable platen 7 is provided at an upper end portion of the support 101. On the upper surface of the first arm 102, the first arm 10
2 is provided with a first slider 103 movable in the longitudinal direction. The first slider 103 is driven along the longitudinal direction X of the first arm 102 by a drive mechanism (not shown) provided inside the first arm 102 (for example, a ball screw mechanism).

The first slider 103 is provided with a second arm 104 extending parallel to the moving direction Y of the movable platen 7. A second arm 1 is provided on a side surface of the second arm 104.
A second slider 105 that is movable in the longitudinal direction Y of 04 is provided. The second slider 105 is connected to the second arm 10.
The second arm 104 is driven in the longitudinal direction Y by a driving mechanism (not shown) (for example, a ball screw mechanism) provided inside the fourth arm 4. Second slider 105
, A telescopic arm 106 extending in the vertical direction is attached. The telescopic arm 106 includes a fixed portion 106a fixed to the second slider 105, and an elevating portion 106b slidable up and down with respect to the fixed portion 106a. At the lower end of the elevating part 106 b of the telescopic arm 106, a take-out plate 200 for holding and taking out the molded body A (FIG. 5) closely contacting the movable mold plate 6 is provided.

The telescopic arm 106 is configured such that a lifting mechanism 106b moves up and down by a drive mechanism (rack and pinion mechanism or the like) (not shown) provided in the fixed part 106a. The take-out plate 200 is shown in FIG. The position facing the movable mold plate 6 as shown in FIG.
To be moved to a position retracted upward. The take-out plate 200 is provided with the elevating unit 10 of the telescopic arm 106.
A state in which the movable mold plate 6 is parallel to a separation surface (a surface on which the cross groove 60 shown in FIG. 3 is formed) by a rotating mechanism (not shown) provided in the movable mold 6b (FIG. 6), Board 6
(See FIG. 8).

The first arm 102, the first slider 103,
The second arm 104 and the second slider 105 move the telescopic arm 106 from a position substantially above the movable mold plate 6 as shown in FIGS. 6 to 8 (to the injection molding apparatus 1 as shown in FIG. 9). The molded body A is moved to a position above the device N of the next process (adjacently provided), and is transferred to the device N of the next process. Here, the take-out device 100 including the take-out plate 200 corresponds to a specific example of the “molded product take-out device” in the present invention.

FIG. 10 is a perspective view showing the shape of the take-out plate 200 of the take-out device according to the present embodiment as viewed from below. FIGS. 15 and 16 show the extraction plate 200 in FIG.
FIG. 5 is a side view showing a cross section of a part viewed from the direction of the arrow XV at 0, for explaining the operation of the take-out device described later, but will also be referred to in the description of the structure of the take-out plate 200. Here, the take-out plate 200 corresponds to a specific example of the “gripping mechanism” in the present invention.

The take-out plate 200 is a combination of a guide plate 210 and a support plate 220, which are two plate-like members parallel to each other. One surface of the guide plate 210 (support plate 2
On the surface opposite to the 20th side), a cross groove 211 composed of four linear grooves extending radially from the center of the surface, and a circumference extending circumferentially around the cross groove 211 A groove 212 is formed. A center hole 213 having a circular cross-section is formed through the guide plate 210 at the center of the cross groove 211. At predetermined positions along the four linear grooves of the cross portion 211, insertion holes 214 that are through holes having a rectangular cross section that is long in a direction perpendicular to the linear grooves are formed. As shown in FIG. 11, the cross groove 211 and the circumferential groove 212
And the center hole 213 is formed in the molded body A in close contact with the movable mold plate 6.
Is pressed against the guide plate 210, the runner portion R of the molded body A comes into contact with the cross groove portion 211, the sprue portion S is inserted into the center hole 213, and the molding object C and the gate portion G are formed.
Are located in the circumferential groove 212. At four corners of the guide plate 210, holes 217 through which the four guide pins 72 (FIG. 3) of the movable platen 7 are inserted are formed.
The guide plate 210 corresponds to a specific example of a “guide member” in the present invention, and the support plate 220 corresponds to a specific example of a “support member” in the present invention.

As shown in FIG. 10, the support plate 220
The telescopic arm 106 (FIG. 6) is fixed to the lower end of the elevating part 106b. The support plate 220 has four pins 221.
Are mounted via bearings 222 so that they can move toward and away from the guide plate 210. In FIG. 10, only three pins 221 and three bearings 222 are shown. As shown in FIG. 15, one end of the pin 221 is fixed to the guide plate 210 by a fixing screw (not shown), and the other end of the pin 221 is inserted into the inside of the bearing 222. A stopper 223 for preventing the pin 221 from falling out of the bearing 222 is attached to the edge of the pin 221 on the side opposite to the guide plate 210.

A coil spring 224 is provided around the pin 221.
Are provided to urge the guide plate 210 in a direction away from the support plate 220. That is,
The guide plate 210 includes a pin 221 and a bearing 222.
Accordingly, the support plate 220 is movably supported by the support plate 220 and is urged in a direction away from the support plate 220.

As shown in FIG. 10, in the support plate 220, two of the four insertion holes 214 of the guide plate 210 are provided.
At two corresponding positions, mounting holes 225, which are two through holes having substantially the same size as the insertion holes 214, are formed.
A chuck mechanism 230 having two chuck claws 231 is attached to the attachment hole 225 via an attachment plate 232. As shown in FIG. 11, two chuck mechanisms 230 are inserted into insertion holes 214 of guide plate 210.
The two chuck claws 231 are inserted. Chuck mechanism 23
0 indicates two chuck claws 23 by a built-in motor or the like.
1 are driven in directions approaching and moving away from each other. V-shaped cutouts 231a that contact the runner portion R of the molded body A from both sides are formed on surfaces of the two chuck claws 231 facing each other. The two chuck claws 231 can clamp the runner R of the molded body A by using these notches 231a. The four rectangular through holes 2 of the guide plate 210
Four chuck mechanisms 230 corresponding to all fourteen
May be provided to grip the four runner portions R. Here, the chuck pawl 231 corresponds to a specific example of “a gripping member” in the present invention.

A positioning pin 226 which engages with a positioning hole 69 (FIG. 15) formed at a predetermined position of the movable die plate 6 is provided at an end of the support plate 220 opposite to the side of the lifting arm 106b.
Is erected. At four corners of the support plate 220, holes 227 through which the four guide pins 72 (FIGS. 3 and 4) of the movable platen 7 are inserted are formed. By engaging the positioning pins 226 of the support plate 220 with the positioning holes 69 (FIG. 15) of the movable mold plate 6, the take-out plate 200 is positioned with respect to the movable mold plate 6.

FIG. 12 is a block diagram showing a control system of the injection molding apparatus 1 according to the present embodiment. Control unit 300
Is constituted by, for example, a CPU (Central Processing Unit), and is a memory 30 as a storage device.
1 is provided. The control unit 300 includes the mold clamping cylinder 9,
Ejector motor 302, cooling system 303 for cooling the mold
And the take-out device 100 is controlled.
Further, the control unit 300 is configured to perform drive control of the heater of the injection unit 3, the screw motor 34, and the like, but a detailed description of these drive controls will be omitted.

The controller 300 includes a signal from the return sensor 110 (FIG. 3) relating to the position of the ejector plate 80, and a mold clamping position sensor 120 relating to the position of the movable platen 7.
(FIG. 2). The control unit 300
Performs drive control of the ejector motor 102 based on a signal related to torque and the like from the ejector motor 302 and a signal from the return sensor 110, and controls drive of the mold clamping cylinder 9 based on a signal from the mold clamping position sensor 120. It is supposed to do.

<Injection Molding Step> FIG. 13 is a process diagram showing the whole injection molding step including the step of removing the molded body according to the present embodiment. First, in the mold clamping unit 2 of the injection molding apparatus 1, the mold clamping cylinder 9 is driven to move the movable platen 7 toward the fixed platen 4, and the fixed mold plate 5 and the movable mold plate 6 are combined. That is, the mold is closed (S2). Next, in the injection section 3, while the molding material is supplied from the hopper 32, the cylinder 31 is heated by the heater, and the screw 33 is rotated to plasticize and fluidize the molding material. Then, the molding material is injected into the mold 10 through the nozzle 35 (S
4). A detailed description of this step is omitted. After the molding is completed, the cooling system 303 is operated in the mold clamping unit 2 to cool the fixed mold plate 5 and the movable mold plate 6 (S6). After the cooling of the fixed mold plate 5 and the movable mold plate 6 is completed, the mold clamping cylinder 9 is driven to move the movable mold plate 6 until the mold clamping position sensor 120 is turned on as shown in FIG. The mold is opened) (S8). Subsequently, a step of taking out a molded body to be described later is executed (S10).
Thereafter, the process proceeds to step S12 shown in FIG. 13, and it is determined whether or not to continue molding (S12). If molding is not to be continued (N in S12), the process ends.
If molding is to be continued (Y in S12), the process returns to step S2.

FIG. 14 is a process diagram showing a process of removing a molded body according to the present embodiment. With the mold opening completed,
The molded body A is in close contact with the movable mold plate 6. Control unit 300
First, the take-out device 100 is driven to press the take-out plate 200 against the movable mold plate 6 (S102). FIG. 15 illustrates a state in which the extraction plate 200 is pressed against the movable mold plate 6. The engagement between the positioning pins 226 of the take-out plate 200 and the positioning holes 69 formed in the movable mold plate 6 allows the movable mold plate 6
Of the take-out plate 200 with respect to. Coil spring 2 provided between guide plate 210 and support plate 220
24 has the maximum stroke, and the stopper 223 of the pin 221 is in contact with the support plate 220.

Subsequently, the control unit 300 drives the ejector motor 302 to cause the ejector
Is projected (S104). As a result, the runner portion R of the protruded molded body A is
11 contacts the bottom surface. The guide plate 210 moves in a direction approaching the support plate 220 against the elastic force of the coil spring 224. As shown in FIG. 16, the coil spring 224 provided between the guide plate 210 and the support plate 220 is in the most compressed state, and the stopper 223 of the pin 221 is separated from the support plate 220. FIG. 17 is a sectional view taken along the arrow XVII-XVII in FIG. At this time,
As shown in FIG. 17, the runner portion R of the molded body A moves from the broken line position P1 to the solid line position P2, and the chuck mechanism 2
30 between the two chuck claws 231. Next, the control section 300 drives the chuck mechanism 230 to move the chuck claws 231 in a direction approaching each other, thereby sandwiching the runner portion R of the compact A with the notch 231a of the chuck claws 231 (S106). Next, the controller 300 drives the ejector motor 302 in the reverse direction to move the ejector plate 80 backward (S108). In this way, as shown in FIG. 18, the runner portion R of the molded body A is held by the chuck claws 231 of the take-out plate 200.

After that, the control unit 300
0 is driven to carry the compact A (S110). Specifically, as shown in FIG. 6, the second slider 105 is moved along the second arm 104 to separate the take-out plate 200 from the movable plate 6. Next, as shown in FIG. 7, the take-out plate 200 is raised by raising the elevating part 106b of the telescopic arm 106, and thereafter, as shown in FIG. 8, the take-out plate 200 is rotated to the horizontal position. Next, the first slider 103 is moved along the first arm 102 by a predetermined amount, and the second slider 105 is moved to the second arm 10.
4 by a predetermined amount, the take-out plate 200
Is transported onto the device N in the next step. Thereafter, the elevating part 106b of the telescopic arm 106 is lowered, and the compact A (FIG. 11) held by the take-out plate 200 is mounted on the device N in the next step. In the device N in the next step, the molding object C (FIG. 11) is cut from the molded body A (FIG. 11). As shown in FIG. 18, the take-out plate 200 is not configured to easily deform like the sprue portion S, but is configured to grip and transport the runner portion R that hardly deforms. Body A
Can be transported while being held in a correct posture. Therefore, the molding object C of the molding A can be accurately positioned and mounted on the apparatus N in the next step.

As described above, according to the present embodiment, the take-out plate 200 grips the runner portion R, which is unlikely to be deformed. This has the effect of being able to be mounted.

According to the present embodiment, the core pin 8
5, the runner portion R of the molded body A protruded by the abutment 5 is brought into contact with the bottom surface of the cross groove 211 of the guide plate 210 and positioned.
In this state, the chuck pawl 231 grips the runner R, so that the chuck pawl 231 can pinch the runner R accurately.

In addition, since the runner portion R of the compact A is sandwiched and gripped by a plurality of (two in this case) chuck claws 231, the compact A can be securely held. Moreover, the compact A
Since the plurality of runner portions R are gripped, the molded body A can be held in a more correct posture.

Although the present invention has been described with reference to the embodiment, the present invention is not limited to this embodiment, and various modifications are possible. For example, FIG.
The present invention is not limited to the injection molding apparatus having the structure shown in FIG. 5, and can be applied to an injection molding apparatus having another structure. Further, the present invention can be applied to a transfer molding device, a transfer injection molding device, and the like. Further, the number of runner portions R of the molded body A is not limited to four,
Any number is acceptable. The number of places to be gripped by the chuck mechanism 230 may be three or more.

[0051]

As described above, the method for removing a molded product according to any one of claims 1 to 5 or the apparatus for removing a molded product according to any one of claims 6 to 10 is provided. According to this configuration, since the arm-shaped portion of the molded body that does not easily deform is gripped, the molded body can be held and transported in a correct posture. Therefore, when the molded body is transported to the device of the next process, it is possible to accurately position the molding target of the molded body with respect to the device of the next process.

In particular, according to the method for removing a molded product according to the second aspect or the molded product removing apparatus according to the seventh aspect, the arm-shaped portion of the molded product is brought into contact with the guide member while the arm-shaped portion is in contact with the guide member. Since the gripping is performed, there is an effect that the arm-shaped portion can be accurately gripped.

According to the method for removing a molded product according to the fourth aspect or the apparatus for removing a molded product according to the tenth aspect, the plurality of arm-shaped portions of the molded product are gripped, so that the molded product can be more easily removed. There is an effect that it is possible to hold the vehicle in a more correct posture.

[Brief description of the drawings]

FIG. 1 is a partially broken front view illustrating a schematic configuration of an injection molding apparatus according to an embodiment of the present invention.

FIG. 2 is a partially broken front view showing a state in which a mold is opened in the injection molding apparatus shown in FIG.

FIG. 3 is a perspective view illustrating a structure of a mold clamping portion of the injection molding apparatus illustrated in FIG.

FIG. 4 is a cross-sectional view illustrating a structure of a mold clamping unit in FIG.

FIG. 5 is a perspective view showing a state in which a core pin protrudes a molded body in the injection molding apparatus shown in FIG.

FIG. 6 is a perspective view illustrating a structure of a molded product removing device according to the present embodiment.

FIG. 7 is a perspective view showing a state in which the take-out device shown in FIG. 6 raises a take-out plate.

8 is a perspective view showing a state in which the take-out device shown in FIG. 6 pivotally moves a take-out plate.

9 is a perspective view showing a state in which the take-out device shown in FIG. 6 has transferred a take-out plate to a device in a next step.

FIG. 10 is an exploded perspective view showing a structure of a holding body of the take-out device shown in FIG.

11 is a perspective view illustrating a shape of a gripper of the take-out device illustrated in FIG.

FIG. 12 is a block diagram showing a control system of the injection molding apparatus shown in FIG.

FIG. 13 is a process chart showing an injection molding step including a step of removing a molded body according to the present embodiment.

FIG. 14 is a process diagram illustrating a process of removing a molded body according to the present embodiment.

15 is a cross-sectional view illustrating a state immediately before the take-out plate illustrated in FIG. 10 grips a formed body.

FIG. 16 is a cross-sectional view illustrating a state in which the extraction plate illustrated in FIG. 10 grips a formed body.

17 is a cross-sectional view illustrating a positional relationship between a chuck claw of the unloading device illustrated in FIG. 10 and a runner portion of a molded body.

FIG. 18 is a perspective view illustrating a state in which the removal device illustrated in FIG. 10 grips a molded body.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Injection molding apparatus, 2 ... Mold clamping part, 3 ... Injection part, 4 ... Fixed platen, 5 ... Fixed mold plate, 6 ... Movable mold plate, 7 ... Movable platen,
Reference Signs List 8: ejector mechanism, 80: ejector plate, 85: core pin, 9: mold clamping cylinder, 10: mold, 100: ejection device, 200: ejection plate, 210: guide plate, 211: cross groove, 212: circumferential groove , 220: support plate, 230: chuck mechanism, 231: chuck claw.

Claims (10)

[Claims] 1. A first channel portion into which a molten molding material is injected, a hollow portion having a shape corresponding to the shape of an object to be molded, and a molten molding material injected into the first channel portion. Using a mold having a second flow path leading to the cavity,
A molding device removing method applied to a molding apparatus for molding the molding object, wherein the molding object is obtained by injecting the molten molding material into the molding die and solidifying the molded object. home,
A gripping step of gripping an arm-shaped portion formed corresponding to the second flow path portion; and a take-out step of taking out the molded body from the mold while holding the arm-shaped portion. Molded article removal method. 2. A projecting step of projecting the molded body from the molding die; and a positioning step of positioning the arm-shaped part of the molded body projected from the molding die by contacting the arm with a predetermined guide member. 2. The method according to claim 1, wherein in the gripping step, the arm-shaped part of the molded body is gripped while the arm-shaped part is in contact with the guide member. . 3. The method according to claim 2, wherein, in the positioning step, an arm-shaped portion of the molded body is elastically pressed against the guide member. 4. The removal of a molded product according to claim 1, wherein in the gripping step, the arm-shaped portion is gripped by being sandwiched by at least two gripping members. Method. 5. In the case where the molding die includes a plurality of the hollow portions and the plurality of the second flow passage portions, at the gripping step, grips at least two of the plurality of arm-shaped portions. The method for removing a molded product according to any one of claims 1 to 4, wherein the method is performed. 6. A first channel portion into which a molten molding material is injected, a hollow portion having a shape corresponding to the shape of an object to be molded, and a molten molding material injected into the first channel portion. A molding apparatus for molding a molded body including the object to be molded using a molding die having a second flow path portion leading to the cavity, wherein the molding die is melted in the molding die. A molded body obtained by injecting and solidifying a molding material is provided with a gripping mechanism for gripping an arm-shaped portion formed corresponding to the second channel portion, and the arm-shaped portion is gripped by the gripping mechanism. A molded product removal device, wherein the molded product is taken out of the molding die while holding a part. 7. The gripping mechanism further includes a guide member abutting on the arm-shaped part of the molded body, wherein the gripping mechanism is in a state where the guide member is abutted on the arm-shaped part of the molded body. 7. The apparatus according to claim 6, wherein the apparatus is configured to grip the arm-shaped portion of the molded body. 8. The holding mechanism according to claim 7, wherein the gripping mechanism further includes a support member configured to support the guide member and to urge the guide member toward the molding die. Molded body removal device. 9. The gripping mechanism according to claim 6, wherein the gripping mechanism includes at least two gripping members that sandwich and hold the arm-shaped portion of the molded body. 2. The molded product removal device according to 1. 10. The molded product removal device according to claim 6, wherein the gripping mechanism is configured to grip a plurality of arm-shaped portions of the molded product. .