JPH0620633B2 - Molding machine clamping device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a mold clamping device used in a molding machine such as an injection molding machine, a die cast machine, or a press molding machine.

[Prior Art] A mold clamping device, in which a fixed platen and a movable platen are installed on the machine base in a pair, and the movable platen is movable forward and backward with respect to the fixed platen by a pair of guide rails arranged in parallel on the machine base, is a special feature. Kaisho 64-87219
It is known from the Japanese Patent Publication.

In such a mold clamping device, a mold clamping device that inserts a movable plate into a plurality of tie bars provided over a pair of fixed plates on the machine base and moves the movable plate forward and backward with respect to the fixed plate using the tie bars as guides Differently, it is necessary to secure the parallelism of the die mounting surfaces of the fixed platen and the movable platen by some means.

The adjustment of the parallelism is an extremely small amount, and in order to make the adjustment possible, in the above-mentioned conventional apparatus, a long support is attached to the left and right of the leg of the moving die plate, and the lower side of the support is attached. A guide mounting plate and a guide block are provided on the moving die plate, and the movable die plate is placed on the guide rail. Pin-coupled.

[Problems to be Solved by the Invention] In this conventional structure, the guide mounting plate and the support are relative to each other by a stopper bolt that is screwed into the guide mounting plate from the inner surface of the tip of the support and the screw tip abuts against the guide mounting plate. Since the parallelism of the movable die plate with respect to the fixed die plate is adjusted by shifting the guide die plate, the connection between the guide mounting plate and the support is limited to the above-mentioned four positions on the front, rear, left and right, and the relative displacement of the connection part is allowed. Since they are coupled only to the extent that they are tightened, if the mold is repeatedly clamped, the stopper bolt will loosen and the guide mounting plate will be displaced, and parallelism will likely be lost.

The present invention has been conceived in order to solve the above-mentioned conventional technical problems, and its object is to make the upper plate of the movable plate and the lower part of the guide rail side, even if some adjustment of parallelism is required. Provides a mold clamping device for a molding machine with a new structure in which the slider composed of the plate is firmly connected and the parallelism of the movable plate is not lost due to loosening even when the mold is repeatedly moved to open and close. To do.

[Means for Solving the Problems] The feature of the present invention according to the above-mentioned object is that a fixed platen and a movable platen are installed on the machine base in a pair, and the movable platen is provided in parallel on the machine body upper surface by a pair of guide rails. In a mold clamping device of a molding machine that is movable back and forth with respect to a fixed plate, a slider is provided between the movable plate and each guide rail, and an upper plate fixed to the movable plate and a lower plate on the guide rail side. In addition, the two plates are slidably stacked on top of each other, and a plurality of detachable bolts are sewn at the required places to firmly connect them, and one of the sliders is used as the center of rotation of both upper plates. It consists of piercing a pin.

[Operation] In the above-mentioned configuration, when the upper plate and the lower plate of the slider are uncoupled from each other by the bolts, the two plates become slidable with respect to each other. Therefore, when both lower plates are fixed and the upper plate of the slider having no pin is pressed in the front or rear direction, both upper plates rotate around the pin together with the movable plate. As a result, the direction of the movable plate relative to the fixed plate also changes, so that the parallelism of the movable plate can be adjusted only by sliding the upper plate.

Further, after the adjustment, the upper plate and the lower plate are sewn again with the bolts and firmly connected, so that the displacement does not occur due to the repeated movements.

[Embodiment] 1 is a fixed plate which is installed on the upper surface of a machine base 2 and has mold clamping cylinders 3 at four corners.

Reference numeral 4 denotes a movable plate opposite to the fixed plate 1, which is the mold clamping cylinder 3
Tie bars 5 connected by meshing with mold clamping pistons (not shown) inside the are provided at four corners.

Such a movable platen 4 is provided on a pair of guide rails 6 and 6 arranged on the upper surface of the machine base at right angles to the fixed platen 1 so as to be movable back and forth via a slider 7. It is composed of a rectangular upper plate 7a and a lower plate 7b which are slidably stacked and have the same size.

Holes for bolts 8 are formed at the same positions on the front and rear plate surfaces on both sides of both plates. The bolt holes on the lower plate side are
Even if the bolt holes on the upper plate side are displaced to some extent, it is preferable to form a loose hole having a required diameter so that the two plates can be joined by the bolts 8.

The upper plate 7a of each slider 7 is centered on the die mounting surface of the movable platen 4 and is bolted to both sides of the lower surface of the movable platen 4, and the lower plate 7b is a guide integrally provided on the lower surface thereof. The member 9 is fitted on the upper portion of the guide rail and is movably provided on the guide rail 6.

The upper plate 7a and the lower plate 7b are firmly joined together by the bolts 8 so that the movable platen 4 is laid across the guide rails 6 and 6, and at the center of one side of the slider 7, both upper plates 7a are formed. , 7a are provided so as to extend through the pin 10 which serves as the center of rotation.

The parallelism of the movable platen 4 is adjusted by the slider 7 using a jig as shown in FIGS. 3 and 4.

This jig includes an L-shaped receiving metal fitting 11 which is bolted to the upper surface of the machine base over the guide rail 6, and a pair of upper and lower adjusting bolts 12 and support bolts 13 which are horizontally screwed into the receiving metal fitting 11. After the support brackets 11 are arranged in front of and behind the sliders 7 and 7 and fixed on the machine base, both support bolts 13 on the lower side are extended and fixed by sandwiching the lower plate 7b from both ends.

After this preparation, loosen the bolts 8 that connect the two plates, retract the tips of the bolts 8 to the lower plate side, and
After making a and 7a free with respect to the lower plates 7b and 7b, the slider-side upper plate on which the pin 10 is provided is left as it is, and the adjusting bolt 12 is provided only to the front end of the opposite upper plate 7a.
And push the tip against the end face. When the bolt 12 is further rotated in this state, the upper plate 7a slides on the upper surface of the lower plate 7b by the pressing force of the bolt, and also rotates with the pin 10 as a fulcrum.

Along with this, the movable platen 4 fixed on both upper plates 7a and 7b is moved horizontally horizontally in a fan shape, which changes the angle of the mold mounting surface of the movable platen 4 with respect to the mold mounting surface of the fixed mold 1. , The parallelism is adjusted correctly.

After the adjustment, the upper and lower plates are again joined in that state by the bolts 8, and then the jig is removed so that the movable platen 4 can move the guide rails 6 and 6 by the slider 7.

The upper plate 7a can be slid by the adjusting bolt 12 from either the front side or the rear side, and the jig provided on the slider 7 on the side where the pin 10 is provided may have the adjusting bolt omitted.

[Effects of the Invention] As described above, the present invention provides the sliders 7 and 7 provided between the movable platen 4 that is installed opposite to the fixed platen 1 on the machine base and the pair of guide rails 6 and 6 on the upper surface of the machine base. Is composed of an upper plate 7a fixed to a movable plate and a lower plate 7b on the guide rail side, both plates are slidably stacked on each other, and a plurality of detachable bolts 8 and 8 are used to fix a required position. Sew on the slider 7,
Since the pin 10, which serves as the center of rotation of both upper plates, is provided through one of the plates 7, the connection between both plates is firmer than that of the conventional device in which the pins are connected so as to allow relative displacement, and the repetition is repeated. Since the looseness is unlikely to occur due to the forward and backward movement of the movable platen, the parallelism of the movable platen with respect to the fixed platen is always kept correct, and the parallelism is not lost due to vibration or impact during the mold clamping operation.

Also, since the parallelism can be adjusted by sliding the upper plate of the slider without the pin either in the front or back direction, it is easier than adjusting it by operating at multiple points. Also, since it is performed centering on the pin, it becomes smooth, and it has the feature that extremely slight adjustment of parallelism can be performed without difficulty.

[Brief description of drawings]

The drawings schematically show one embodiment of a mold clamping device of a molding machine according to the present invention. Fig. 1 is a side view in which an opening / closing cylinder is omitted, Fig. 2 is a vertical sectional view of a slider portion, and Fig. 3 is a parallel view. FIG. 4 is a partially longitudinal side view when adjusting the degree, and FIG. 4 is a plan view of the same. 1 ... Fixed board, 2 ... Machine stand 4 ... Movable board, 5 ... Tie bar 6 ... Guide rail, 7 ... Slider 7a ... Top plate, 7b ... Bottom plate 8 ... Bolt, 9 ... Guide member 10 …… Pin, 11 …… Receiving metal fitting 12 …… Adjusting bolt, 13 …… Supporting bolt

Claims (1)

[Claims] 1. A mold clamping system for a molding machine, wherein a fixed platen and a movable platen are installed on the machine base in a pair, and the movable platen is provided on the upper surface of the machine base side by side with a pair of guard rails so as to move back and forth relative to the fixed platen. In the device, a slider is provided between the movable plate and each guide rail, and the slider is composed of an upper plate fixed to the movable plate and a lower plate on the guide rail side, and both plates are slidable with respect to each other. Molding characterized by stacking and sewn the required parts firmly with a plurality of detachable bolts and firmly connecting them, and penetrating one of the sliders with a pin that serves as the center of rotation of both upper plates Machine clamping device.