JPS6345933B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a mold slide device incorporating a hydraulic cylinder mechanism. In particular, it relates to a mold slide device in an injection molding machine.

(Prior Art) A mold used in an injection molding machine is conventionally comprised of a fixed mold and a movable mold.

Particularly in injection molding of threaded products, until now a screw extraction mechanism has been built into the mold, which has forced the mold to be complicated and expensive. Furthermore, since rotational movement is required, the screw precision inevitably deteriorates due to the backlash of the bearing.

(Problems to be solved by the invention) (1) Two sets of movable molds are prepared for a fixed mold, and one mold is being used to take out the molded product from the remaining one set of movable molds. (2) simplify the mold as much as possible to reduce costs;
The purpose is to improve accuracy and shorten the molding cycle.

(Solution by the Invention) A slide having a U-shaped cross section is slidably attached to a slide base fixed to a movable platen so as to surround three sides of the slide base, and a hydraulic cylinder is incorporated inside the slide base. A cylinder rod is fixed to the slide via a bracket, two sets of movable side molds are attached to the opposite side of the slide base of the slide, and the fixed platen side is placed so as to face the movable mold that has been moved from between the platens. Product take-out machines or insert machines are arranged symmetrically, so that while molding work is in progress in one mold, the molded product in the other movable mold can be taken out or inserted.

(Example) FIGS. 1 to 3 show an injection molding machine in which the present invention is implemented, where A is a stationary mold and B is a movable mold. C is a mold slide device according to the present invention;
It can be slid by a distance S in the figure in a direction perpendicular to the tightening direction of the movable mold. Reference numeral D denotes a pair of left and right product take-out machines, in which products are taken out from the movable mold carried by a mold slide device.

Now, 1 is a slide base attached to the movable platen 16, and 2 is a slide having a U-shaped cross section, which is slidably attached so as to surround three sides of the slide base 1. 3 is a cylinder tube, which is integrated into the slide base 1. A piston 4 is slidably fitted into the cylinder tube 3. 5 is a cylinder flange, and 6 is a piston rod that is integrally attached to the piston 4 and extends to both sides. Liners 7 and 13 are respectively attached to both sides of the slide 2 facing each other. 8 is a liner adjustment bolt, and 9 is a liner adjustment rod end set screw. Numeral 10 is a slide base fixing bolt for fixing the slide base 1 to the movable platen 16. Reference numeral 11 is attached to the slide 2 with a bracket and extends toward the slide base 1 side. 12 is a nut that connects the piston rod 6
and the bracket 11. 14
15 (Fig. 7) is a holding plate mounting bolt.

Therefore, the piston 4 is connected to the cylinder tube 3
and cylinder flange 5 slide within the combined cylinder. Fixed cushions are provided at both ends of the piston 4 to absorb shocks at each end of the stroke.

Further, the piston rods 6 of the piston 4 have the same cross-sectional area so that the left and right piston rods have the same sliding time. Furthermore, the nut 1
2, the position of the slide 2 can be adjusted within the range of the threaded portion provided on the piston 4. Since the sliding distance of the slide 2 is long, the slide 2
Preventing the liner from tilting in the sliding direction and liner 1
In order to be able to adjust the gap size when the liner 3 is worn out, the liner 7 has a structure in which the gap size can be adjusted using a liner adjustment bolt 8 and a liner adjustment set screw 9. Further, the structure is such that the mold opening force (mold holding force) at the time of taking out the molded product is received by the presser plate 14.

(Function) The present invention has the above structure, and when hydraulic pressure is sent from one side of the cylinder flange 5, the piston rod 6 moves to the stroke end of the piston 4. Since a cushion mechanism is built in the stroke end of the piston 4, the piston rod 6 is decelerated when it enters the cushion portion, and when it hits the cylinder flange 5 at the stroke end of the piston 4, it stops at that position. In order to always stop at the same position, the piston rod 6 is kept under pressure.
The slide 2 slides by the cylinder stroke via the piston rod 6 and the bracket 11, and the mold B on the movable side always stops at the same position. When one cycle of molding is completed, the mold is opened and hydraulic pressure is sent from the cylinder flange 5 on the opposite side to perform the same operation.
With this operation, one movable mold B can perform molding, and the other movable mold B can take out the molded product or perform an insert operation.

(Effect) A slide with a U-shaped cross section is slidably attached to surround the three sides of the slide base fixed to the movable platen, and the piston rod of the hydraulic cylinder built into the slide base is slid through the bracket. and two sets of movable side molds were attached to the opposite surface of the slide base of the slide. Further, on the fixed platen side, a product take-out machine or an insert machine was arranged symmetrically so as to face the movable mold that had been moved from between the platens.

Because of this configuration, (1) Prepare two sets of movable molds for the fixed mold A, and take out the molded product of the remaining one set of movable molds while molding is being performed with one of them. Now I can do it.

(2) By mounting a slide with a U-shaped cross section so as to surround three sides of the slide base, the movable mold can be guided accurately, making it possible to mold precision molded products.

(3) Since the molded product can be removed from the mold on the outside, the mold can be simplified, making it possible to reduce costs and shorten the molding cycle.

[Brief explanation of drawings]

FIG. 1 shows an injection molding machine in which the present invention is implemented. Second
The figure is a view taken along the - arrow in FIG. FIG. 3 is a view taken along the arrow in FIG. FIG. 4 shows a mold slide device of the present invention. FIG. 5 is a view taken along the arrow in FIG. FIG. 6 is a view taken along the arrow in FIG. FIG. 7 is a view taken along the - arrow in FIG. FIG. 8 is a view in the direction of the arrows in FIG. 4. FIG. 9 is a detailed view of the section shown by the arrow in FIG. FIG. 10 is a detailed view of FIG. 6 in the direction of the arrows. In the figure: 1...Slide base, 2...Slide, 3...Cylinder tube, 4...Piston, 5...Cylinder flange, 6...Piston rod, 7, 13...Liner, 8...Liner adjustment Bolt, 9...Liner adjustment rod end set screw, 10...Slide base fixing bolt, 11
... Bracket, 12 ... Nut, 14 ... Holding plate, 15 ... Holding plate mounting bolt, 16 ... Platen.

Claims (1)

[Claims] 1. A slide 2 having a U-shaped cross section is slidably mounted on a slide base 1 fixed to a movable platen 16 so as to surround three sides of the slide base 1, and a hydraulic cylinder is installed inside the slide base 1. A piston rod 6 is fixed to the slide 2 via a bracket 11, two sets of movable side molds are attached to the opposite side of the slide base 1 of the slide 2, and a movable mold moved from between the platens is attached to the fixed platen side. A mold slide device in an injection molding machine that incorporates a hydraulic cylinder mechanism in which a product take-out machine D or an insert machine is arranged symmetrically so as to face the machine.