SU1090571A1 - Mould for making bulky polymeric articles - Google Patents

Abstract

1. LITHIUM FORM FOR MAKING A LARGE DIMENSIONAL POLYMERNB1 PRODUCT, containing a fixed half-form, including a runner plate, rigidly connected to a punch, in which a runner channel is pushed, pushing the plate with ejectors and signs, the transfer template of the application template and the application template. a base with a die holder fixed on it, characterized in that, in order to expand the technological capabilities of the mold by producing box products with undercuts in the projections, along one From the side surfaces. The shape is provided with sliders made in the form of U-shaped plates, mounted in a fixed half-form that can be moved along one of the side surfaces of the punch, with one shoulder of the sliders rigidly connected with the sign, and the other is made with an opening for an inclined column.

Description

2. Casting mold according to claim 1, characterized in that the pushing is made in the form of a frame concentrically placed on the punch, and the mechanism for moving the pushing plate is made in the form of a pair of sliding strips with sockets intertwined with each other fixed to the matrix holder. clips fixed in the pushing plate and bevels on external surfaces interacting with eccentrically mounted on the axes fixed on the sprue plate with rollers.

one

The invention relates to the processing of polymeric materials and can be used for the manufacture of large-size box-shaped products with undercuts in the protrusions of, for example, parts of suitcases with openings in eyelets.

A casting mold for the manufacture of polymer products is known, comprising a fixed mold and a movable mold, including an ejector system and a punch with a sign located in it.

The movement of the mark is provided by an abutment interacting with the gating plate and the spring 1.

The form allows the manufacture of products with an undercut of limited depth and normal to the surface of the product.

The closest to the technical essence and the achieved effect of the invention is a casting mold for the manufacture of large polymer products, containing a stationary half-form including a runner plate rigidly connected to the plug, in which the runner channel, the pushing plate with ejector pushers and signs, displacement of the pushing plate, a movable half-form including a base with a holder of the die 2 fixed on it.

However, the known form does not allow the manufacture of articles with undercuts in the protrusions along one of the side surfaces of the box-shaped products.

The aim of the invention is to extend the technological capabilities of the mold by producing box products with undercuts in the protrusions along one of the side surfaces of the products.

The goal is achieved by the fact that the casting mold for the manufacture of large polymer products, contains a fixed mold, including a runner plate, rigidly connected to a punch, in which a runner channel, a pushing plate with pushers and signs, a moving plate moving mechanism, movable half form

including a base with a die clip fixed on it, provided with sliders made in the form of U-shaped plates mounted in a fixed half-shape with the ability to move along one of the side surfaces of the punch, while one shoulder of the sliders is rigidly connected with the sign, and the other is made with hole under the sloping column.

In addition, the pushing plate is made in the form of a frame concentrically placed on the punch, and the mechanism for moving the pushing plate is made in the form of paired, fixed on the matrix cage, spring-loaded one to another sliding plate with sockets interacting with the studs mounted in the pushing plate, and bevels on external surfaces interacting with eccentrically mounted on the axes mounted on the gating plate, rollers.

 FIG. 1 shows a sectional shape; in fig. 2 is a view A of FIG. 1 (view of the mechanism for moving the pushing plate); in fig. 3 is a section BB in FIG. 2; in fig. 4 shows a section B-B in FIG. one; in fig. 5 - section

5 YY in FIG. one; in fig. 6 is a section DD-D in FIG. five; in fig. 7 - sectional shape when removing the product.

The casting mold contains a fixed mold, including a sprue plate.

1, rigidly connected to the punch 2, in which the gating channel 3 is made, the pusher plate 4 with the pushers 5 and the marks 6. The pusher plate 4 is designed as a frame concentrically placed on the punch 2. The mechanism for moving the pushing plate 4 is made in the form of paired fixed on the holder 7 of the matrix 8, spring-loaded, one relative to another, sliding olanok 9 with sockets 10, interacting with pins 11 fixed in the pushing plate 4, and bevels 12 on the external surfaces interacting with eccentrically mounted on the axes 13, closed rollers 14. The movable half-form includes a base 15 with a holder 7 of matrix 8 fixed on it. The form is equipped with sliders 16, which are made as U-shaped plates, mounted on the fixed form and moveable along one of the side surfaces of the punch 2. One shoulder of the sliders 16 is rigidly connected with the sign 6, and the other is made with a hole 17 for the inclined column 18. The sliders 16 are placed between the bars 19 and 20. The slots 10 in the sliding bars 19 are made to a length equal to the idle speed of the pushing plate . Columns 21 are provided for centering the movable and fixed half-molds. The pushing plate 4 is spring-loaded relative to the gate plate 1 and provided with counter-pushers 22. The casting mold works as follows. After the injection of the polymer material and the technological exposure, the shape is opened, while the inclined columns 18 marks 6 are removed from the product that remains on the punch 2. At the same time, the pins 11 move in the slots 10 of the sliding bars 9 held in the closed position by the rollers 14. At the end displacement by the amount of idling, the pushing plate 4 is carried away by the sliding strips 9 and the product by the pushing members 5 is removed from the punch 2. Next, the sliding strips 9 stop interacting with the rollers 14 and unfold with puffs 11. Smooth interaction with the rollers 14 is effected due to their eccentric mounting on the axes 13. After the inclined columns 18 come out of the holes 17 of the sliders 16, the latter are fixed. The sliding strips 9, freeing themselves from the rollers 14, are kept from being deflected by the fingers. The closure of the form is performed in the reverse order; due to internal bevels, the studs 11 are inserted into the slots 10 of the sliding bars 9, which are closed by springs and fixed by the rollers 14, while fixation is carried out smoothly due to the eccentricity of the rollers and bevels 11 on the outer surfaces of the sliding bars 9. The pushing plate 4 is in its initial position it is returned by counter shooters 22. The invention allows, when forming box-shaped articles, to make a hole in the projections in the immediate vicinity of the side surface and along it, since its shoulder is used to move the slide, not with zannoe A direct but with a sign. In addition, the execution of the pushing plate in the form of a frame and its placement on the punch reduces the size of the form, and the implementation of the mechanism for moving the pushing plate provides a smoother opening of the form without impact loads, which generally increases the reliability of its operation. The use of the invention will allow to extend the technological capabilities of the molds for the manufacture of large-sized products.

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Claims (2)

1. INJECTION FORM FOR MAKING LARGE-SIZED POLYMER PRODUCTS, comprising a fixed half-mold including a sprue plate rigidly connected to a punch, in which a sprue channel is made, pushing a plate with ejectors and signs, a mechanism for moving the pushing plate, moving itself into it, including a base with a matrix holder fixed to it, characterized in that, in order to expand the technological capabilities of the mold by manufacturing box products with undercuts in the protrusions, along one of the ovyh surfaces form is provided made in the form of U-shaped plates sliders mounted in the stationary mold half movable along one of the side surfaces of the punch, with one arm slide rigidly associated with a sign, and the other hole is adapted to the inclined column. 8 2 <7 IN FIG. ! 2. Injection mold in π. 1, characterized in that the pushing plate is made in the form of a frame concentrically placed on the punch, and the mechanism for moving the pushing plate is made in the form of paired matrix clips spring-loaded to one another sliding plates with sockets interacting with pins fixed in the pushing plate , and bevels on the outer surfaces interacting with the rollers eccentrically mounted on the axes mounted on the sprue plate.