JPH05245892A - Vertical injection molding machine - Google Patents

Abstract

PURPOSE:To protect a mold clamping unit having its mold clamping axial line set vertically from swinging left and right by a single toggle or the driving of a crank mechanism in a vertical injection molding machine. CONSTITUTION:In a vertical injection molding machine with its mold clamping unit 3 supported by a base 2 driven by a single toggle or a crank mechanism 11, an adjusting platen 6 moved up and down by the single toggle or the crank mechanism 11 is guided by a guide 14 installed between said platen and the guide 14 to prevent the movement in the lateral direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical injection molding machine in which a mold clamping axis of a mold clamping unit is arranged vertically.

[0002]

2. Description of the Related Art In a vertical injection molding machine, a mold clamping axis of a mold clamping unit (an axis extending through a center of a mold and in which a mold clamping force acts) is arranged vertically. Usually, the mold clamping unit is provided with an upper platen, a middle platen and an adjust platen (lower platen), the middle platen is fixed horizontally to the base, and the upper platen and the adjust platen are joined by four tie rods penetrating this. It has a structure. And, between the upper platen and the middle platen is configured as a mold clamping part, the middle platen and the adjusting platen are coupled by the mold clamping mechanism, and the adjusting platen is moved up and down with respect to the middle platen, that is, the base, The mold attached to the tightening portion is clamped and the mold is opened and closed.

In such a structure, since the adjust platen is hung from the middle platen, the mold clamping mechanism is composed of a single toggle or crank mechanism in which the middle platen and the adjust platen are combined and a driving device for the same. In this case, each time the mold clamping unit is moved up and down, the component force received from the single toggle or the crank mechanism tends to swing the adjust platen left and right, which adversely affects the accuracy such as the parallelism between the platens.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a vertical injection molding machine in which the mold clamping unit does not move laterally.

[0005]

In a vertical injection molding machine, a guide is provided between an adjust platen vertically moved by a single toggle or a crank mechanism and a base, and a force for laterally moving the adjust platen is thereby provided. Is blocked.

[0006]

The guide receives the lateral force applied to the adjust platen and prevents the platen from moving laterally.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a mold clamping device 1 in a vertical injection molding machine. The vertical injection molding machine is configured by combining the mold clamping device 1 with an injection device. However, since the basic configuration of the vertical injection molding apparatus as a whole is not different from the conventional one, the illustration and detailed description thereof including the injection apparatus will be omitted.

The mold clamping device 1 comprises a base 2 and a mold clamping unit 3, and the mold clamping unit 3 has its mold clamping axis a.
Mounted vertically on the base 2. That is,
The mold clamping unit 3 has an upper platen 4, an intermediate platen 5 and an adjusting platen (lower platen) 6, and the upper platen 4 and the adjusting platen 6 are connected by four tie rods 7. Each tie rod 7 penetrates the middle platen 5 vertically and is slidable. The middle platen 5 constitutes a part of the base 2, whereby the mold clamping unit 3 is attached to the base 2. The base 2 has four columns 8 (FIG. 2), and the middle platen 5 is fixed to the upper end thereof.

A mold clamping portion 9 is provided between the upper platen 4 and the middle platen 5, and a mold 10 is attached thereto. The middle platen 5 and the adjusting platen 6 are connected by a single toggle or a crank mechanism 11, and the driving device 12 is attached to the adjusting platen 6. Reference numeral 13 is a die height adjusting mechanism. A guide 14 is provided between the adjusting platen 6 and the support 8 of the base 2.

The guide 14 is composed of a linear liner including a rail 15 and a slide table 16 sliding along the rail 15. The slide table 16 is a single toggle or crank mechanism 1 in the adjusting platen 5.
1 is fixed to both side surfaces of the side that bends in the horizontal direction with the fitting direction with the rail 15 being vertical, and the rail 15 is arranged corresponding to the slide table 16 and fixed to the side surface of the column 8. Mounted vertically on 17. The stay 17 has bolts 19 through the long holes 18 (FIG. 3).
Since it is fixed to the support column 8 by this, the close distance to the side surface of the middle platen 5 can be adjusted and attached. The slide table 16 and the rail 15 which are actually assembled as a linear liner are fixed to the side surface of the middle platen 5 and the stay 17 of the column 8 without disassembling, respectively. As described above, the middle platen 5 is attached to the base 2 by the guide 14 so as to be slidable in the vertical direction without any play in the lateral direction in which the single toggle or the crank mechanism 11 bends.

In the mold opening / closing process of the injection molding operation, the drive device 12 drives the single toggle or the crank mechanism 11 to move the adjust platen 6 up and down with respect to the middle platen 5, and at the mold clamping portion 9, the mold is closed. Opening and closing of 10. At this time, the operation of the single toggle or the crank mechanism 11 produces a component force that moves the platen 16 left and right in the lateral direction where the toggle is bent, in addition to the force that moves the adjust platen 6 up and down. Two
It is completely received by the guide 14 provided between the and. As a result, no force that causes distortion is applied between the tie bar 7 and the support portion of the middle platen 5.

The above is an embodiment. The guide 14 is not limited to a linear guide, but is attached to the side surface of the middle platen 5 and allows the middle platen 5 to move up and down with respect to the base 2 like a roller that rolls while contacting the side surface of the column 8. Any function that prevents movement is acceptable. In the embodiment, the drive device 12 may be attached to the side of the middle platen 5.

[Brief description of drawings]

FIG. 1 is a schematic front view.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a front view of details.

[Explanation of symbols]

1 Clamping Device 2 Base 3 Injection Unit 4 Upper Platen 5 Middle Platen 6 Adjust Platen 7 Tie Rod 8 Support 9 Mold Clamping Part 10 Mold 11 Single Toggle or Crank Mechanism 12 Drive Device 13 Die Height Adjusting Mechanism 14 Guide 15 Rail 16 Slide Table 17 Stay 18 Long hole 19 Bolt

Claims (1)

[Claims] 1. A mold clamping unit supported by a base,
A vertical injection molding machine driven by a single toggle or crank mechanism, in which an adjust platen vertically moved by the single toggle or crank mechanism is prevented from moving laterally by a guide provided between the adjust platen and the base. A vertical injection molding machine characterized by that.