JP2006297864A - Vertical injection molding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the replacing workability of a mold in the vertical injection molding machine of a type for moving a movable die plate having a movable mold attached on its undersurface side up and down with respect to a fixed die plate having a fixed mold attached on its upper surface side. <P>SOLUTION: In the vertical injection molding machine for moving a movable die plate having a movable mold attached on its undersurface side up and down with respect to a fixed die plate having a fixed mold attached on its upper surface side, the fixed die plate is allowed to bear the function as a machine frame and the upper surface of the fixed die plate also used as a part of the machine frame is made flush. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vertical (vertical) injection molding machine in which a movable die plate having a movable die attached to a lower surface thereof moves up and down with respect to a fixed die plate having a fixed die attached to an upper surface thereof. .

  In a vertical injection molding machine of a type in which a movable die plate with a movable side mold attached to its lower surface side moves up and down with respect to a fixed die plate with a fixed side die attached to its upper surface side, the fixed die plate is The fixed die plate is mounted on a fixed die plate holding frame, which is a member constituting a part of the machine frame, and is fixed by a bolt or the like. Generally, the upper surface is configured to take a higher position than the upper surface of the fixed die plate holding frame.

  As described above, conventionally, the upper surface of the fixed die plate placed substantially at the center of the fixed die plate holding frame is located higher than the upper surface of the four surrounding fixed die plate holding frames. There was a problem that work at the time of carrying out and carrying in was difficult, and the workability of mold exchange was poor.

  The present invention has been made in view of the above points. The object of the present invention is to provide a movable die having a movable die attached to the lower surface thereof with respect to a fixed die plate having a fixed die attached to the upper surface thereof. In a vertical injection molding machine of a type in which a die plate moves up and down, it is to improve workability of mold replacement.

In order to achieve the above-described object, the present invention achieves vertical injection in which a movable die plate having a movable die attached to its lower surface moves up and down with respect to a fixed die plate having a fixed die attached to its upper surface. In the molding machine,
A structure in which the fixed die plate has a function as a machine frame, and the upper surface of the fixed die plate that also serves as a part of the machine frame is flush.
Or
The fixed die plate is fixed to a fixed die plate holding frame which is a member constituting a part of the machine frame, and the upper surface of the fixed die plate and the upper surface of the fixed die plate holding frame are flush with each other.
Take.

  According to the present invention, the upper surface of the fixed die plate that also serves as a part of the machine frame is configured to be flush with each other, or the upper surface of the fixed die plate and the upper surface of the fixed die plate holding frame are configured to be flush with each other. When exchanging the mold, slide the mold on the upper surface of the fixed die plate that also serves as a part of the machine frame with the fixed mold and the movable mold overlapped, or the upper surface of the fixed die plate and It is possible to slide on the upper surface of the fixed die plate holding frame. Therefore, the workability of carrying out and carrying out the mold is improved, and the mold can be easily replaced. In addition, when performing insert molding using a hoop material, the hoop material made of a long thin metal plate is kept horizontal with the upper surface of the fixed mold, and the hoop material is stepped accurately. The guide mechanism can be easily arranged on the above-mentioned flush surface, and is suitable for insert molding using a hoop material.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 4 relate to a vertical injection molding machine according to a first embodiment of the present invention, and FIG. 1 illustrates a partial cover showing a mold opening / closing system mechanism of the vertical injection molding machine according to the first embodiment. FIG. 2 is a perspective view showing a main part of the vertical injection molding machine according to the first embodiment viewed from an angle different from that of FIG. 1.

  1 and 2, reference numeral 1 denotes a machine frame as a structure for holding the entire machine. The machine frame 1 is erected on the base frame 2 located at the bottom and the front side (front side) of the base frame 2. -Two fixed front columns 3, a rear support frame 4 erected and fixed on the rear side (back side) of the base frame 2, and a fixed die fixed to the front columns 3 and the rear support frame 4. The plate 5 includes two corner support frames 6 that are erected and fixed at the front corner of the fixed die plate 5.

  In the first embodiment, the fixed die plate 5 also serves as a part of the machine frame 1, and the entire upper surface of the fixed die plate 5 is formed flush with no stepped portion. A fixed mold (not shown) is attached to the upper surface of the fixed die plate 5.

  A tail stock 7 is provided so as to be movable up and down. A servo motor 8 for opening and closing the mold is mounted on the tail stock 7. Reference numeral 9 denotes four tie bars having one end fixed to the tail stock 7 and the other end fixed to a movable die plate 10 that can move up and down. The tie bar 9 allows the tail stock 7 and the movable die plate 10 to be integrated. The tie bar 9 is inserted so as to be slidable in the vertical direction with respect to the fixed die plate 5. A movable mold (not shown) is attached to the lower surface of the movable die plate 10. 11 is a known toggle link mechanism provided between the lower surface side of the fixed die plate 5 and the upper surface side of the tail stock 7, and a crosshead (not shown) that is an input end of the force of the toggle link mechanism 11 is The mold opening / closing servomotor 8 is driven in a vertical direction by a ball screw mechanism (not shown) that converts the rotation of the servomotor 8 into a linear motion, so that it is driven to be folded or extended.

  When the toggle link mechanism 11 is driven to extend, the tail stock 7 is driven downward with respect to the fixed die plate 5, and the tie bar 9 and the movable die plate 10 are lowered integrally with the fixed die plate 5. The tightening is done. When the toggle link mechanism 11 is driven to be folded, the tail stock 7 is driven to rise with respect to the fixed die plate 5, and the tie bar 9 and the movable die plate 10 are raised together with the tail stock 7 to perform mold opening. It has come to be. Although not shown, an injection system mechanism is mounted on the upper surface side of the movable die plate 10, and the injection system mechanism moves up and down integrally with the movable die plate 10.

  As shown in FIG. 2, the space below the fixed die plate 5 is covered by the rear support frame 4 and a cover 12 that covers the front and left and right side surfaces. As shown in FIGS. 1 and 2, a sliding door type safety door that is slidable is located in front of a mold opening / closing space (a space above the fixed die plate 5) in which the movable die plate 10 moves up and down. 13 are provided on the right side and the left side of the mold opening / closing space (the space above the fixed die plate 5). During the molding operation in the automatic operation mode or the semi-automatic operation mode, basically, when any one of these safety doors is opened, the mold opening / closing operation is prohibited. However, when the hoop material is stepped by one molding cycle in the mold open state, the hoop material is continuously and automatically supplied between the molds, and insert molding using the hoop material is performed, the right side surface and the left side surface are The operator can set machine control conditions so that the mold can be opened and closed even when the safety doors 14 and 15 are opened.

  The slidable safety door 13 on the front side of the machine, on which the machine operator stands, has a rail member 16 integrally fixed to the lower end thereof. The rail member 16 is a front side surface (front side surface) of the fixed die plate 5. Is engaged with a linear motion guide 17 fixedly arranged on the left side of the slider so as to be slidable. The linear motion guide 17 is a member that incorporates a ball that rolls and circulates on the rail member 16. By using the linear motion guide 17 that incorporates such a circulating ball, the safety door 13 can be smoothly slid. It can guarantee movement and long life and durable sliding motion. A sliding bush 18 is fixed on the upper side of the safety door 13, and the sliding bush 18 slides along a guide bar 19 spanned between the upper ends of the two corner support frames 6. It is configured as such. Although not shown in the drawing, the safety door 13 is provided with a stopper that defines the maximum opening position. By adopting such a sliding movement mechanism for the safety door 13, when the safety door 13 is opened, there is no rail member serving as a protrusion on the front side of the fixed die plate 5, so that the It is possible to improve workability when performing mold exchange and workability when the operator manually places the insert on the fixed mold every molding cycle from the front side of the machine.

  Further, the safety doors 14 and 15 on the right side surface and the left side surface of the machine have a structure in which side portions thereof are rotatably held by hinges, and when the safety door 14 is opened, the fixed die plate 5 There is no protrusion on the right side, and there is no protrusion on the left side of the fixed die plate 5 when the safety door 15 is opened. Workability at the time of mold exchange can be improved.

  FIG. 3 is an explanatory view of the fixed die plate 5 as viewed from above. As shown in FIG. 3, four tie bars 10 are inserted through the fixed die plate 5, and a fixed side mold 21 indicated by a two-dot chain line in FIG. 3 is in an area surrounded by the four tie bars 10. However, it can be attached with tightening bolts. As shown in FIG. 3, a concave portion 20 is formed on the front side surface (front side surface) of the fixed die plate 5, and this concave portion 20 is a trunk portion of the operator when the safety door 13 is fully opened. Is provided in order to allow a small amount to enter, so that the operator can manually place the insert on the fixed mold every molding cycle from the front side of the machine. It is designed to improve the performance.

  In the first embodiment and the second embodiment described later, the mold replacement can be performed from any direction among the front side, the right side, and the left side of the machine. When exchanging molds, the machine is closed and one or more of the safety doors 13, 14, 15 are opened. Then, with the mold closed, the movable mold is first removed from the movable die plate 10, and then the movable die plate 10 is raised so that the movable mold is left on the fixed mold, The fixed mold is removed from the fixed die plate 5. Next, in a state where the movable mold is superimposed on the fixed mold, the mold is slid in a predetermined direction on the fixed die plate 5, and the mold is moved from the front side, right side, or left side of the machine. Unload the mold out of the machine. When attaching the mold to the machine, reverse the above procedure. FIG. 4 is an explanatory view of the fixed die plate 5 as viewed from the right side, and shows the state in which the movable side mold 22 is superimposed on the fixed side mold 21 when the mold is replaced. Yes.

  Further, in the first embodiment and the second embodiment to be described later, the hoop material is step-feeded every molding cycle in the mold open state, and the hoop material is continuously and automatically supplied between the molds. When performing the insert molding, the operator sets the machine control conditions so that the mold can be opened and closed even when the right and left safety doors 14 and 15 are opened. Then, with the safety doors 14 and 15 on the right side and left side of the machine opened, a hoop material drawing / feeding mechanism made of a long thin metal plate and hoop molding on the right and left sides of the machine A long article receiving mechanism in which the subsequent resin and the hoop material are integrated is provided. In addition, a guide mechanism is provided on the fixed die plate 5 for keeping the hoop material in the machine level with the upper surface of the fixed mold and feeding the hoop material accurately in steps.

  As described above, in the first embodiment, since the upper surface of the fixed die plate 5 which also serves as a part of the machine frame is flush with the fixed die and the movable die, In an overlapped state, the mold can be slid on the upper surface of the fixed die plate 5, so that the workability of mold replacement is improved. Further, it is also suitable for insert molding using a hoop material.

  Next, a second embodiment of the present invention will be described. FIG. 5 is an explanatory view of the main part of the vertical injection molding machine according to the second embodiment as viewed from above, and FIG. 6 illustrates the main part of the vertical injection molding machine according to the second embodiment from the right side. FIG.

  The second embodiment is different from the first embodiment in that, in the first embodiment, a fixed die plate 5 having a structure also serving as a part of the machine frame 1 is replaced with a fixed die plate holding frame and a fixed die plate. The fixed die plate is fixed on the fixed die plate holding frame, and the upper surface of the fixed die plate holding frame and the upper surface of the fixed die plate are flush with each other. Other configurations are the same as those in the first embodiment.

  5 and 6, reference numeral 31 denotes a fixed die plate holding frame fixed to the front column 3 (not shown in FIGS. 5 and 6) and the rear support frame 4, and 32 denotes a fixed die plate. This is a fixed die plate fixed on the holding frame 31 with fastening bolts, and the upper surface of the fixed die plate holding frame 31 and the upper surface of the fixed die plate 32 are configured to be flush with each other.

  Also in the second embodiment having such a configuration, the same effects as in the first embodiment can be obtained.

It is a principal part perspective view in the state where a part of cover was removed showing the mold opening-and-closing system mechanism of the vertical injection molding machine concerning a 1st embodiment of the present invention. It is the principal part perspective view seen from the angle different from FIG. 1 which shows the type | mold opening-closing system mechanism of the vertical injection molding machine which concerns on 1st Embodiment of this invention. It is explanatory drawing which looked at the fixed die plate which also serves as a part of machine frame from the upper surface in the vertical injection molding machine according to the first embodiment of the present invention. It is explanatory drawing which looked at the fixed die plate which also serves as a part of machine frame from the right side surface in the vertical injection molding machine according to the first embodiment of the present invention. It is explanatory drawing which looked at the fixed die plate holding frame and the fixed die plate from the upper surface in the vertical injection molding machine according to the second embodiment of the present invention. It is explanatory drawing which looked at the fixed die-plate holding frame from the right side surface in the vertical injection molding machine which concerns on 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Machine frame 2 Base frame 3 Front side support | pillar 4 Back side support frame 5 Fixed die plate 6 Corner support frame 7 Tail stock 8 Servo motor for mold opening / closing 9 Tie bar 10 Movable die plate 11 Toggle link mechanism 12 Cover 13 Sliding sliding door Type safety doors 14, 15 Drawer rotation type safety doors 16 Rail members 17 Linear motion guides 18 Sliding bushes 19 Guide bars 20 Recesses 21 Fixed side molds 22 Movable side molds 31 Fixed die plate holding frames 32 Fixed die plates

Claims (2)

In the vertical injection molding machine in which the movable die plate with the movable side mold attached to the lower surface side thereof moves up and down with respect to the fixed die plate with the fixed side die attached to the upper surface side,
A vertical injection molding machine characterized in that the fixed die plate has a function as a machine frame, and the upper surface of the fixed die plate that also serves as a part of the machine frame is flush with each other. In the vertical injection molding machine in which the movable die plate with the movable die attached to the lower surface side moves up and down with respect to the fixed die plate with the fixed die attached to the upper surface side,
The fixed die plate is fixed to a fixed die plate holding frame which is a member constituting a part of the machine frame, and the upper surface of the fixed die plate and the upper surface of the fixed die plate holding frame are flush with each other. A vertical injection molding machine.

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