SU1171337A1 - Casting mould for manufacturing articles from polymeric materials - Google Patents

Description

The invention relates to equipment for processing plastics and can be used in mechanical engineering, in the chemical industry for the manufacture of long products, such as refrigerator panels.

The purpose of the invention is the expansion of the technological capabilities of the mold by ensuring the formation of long products.

FIG. I shows the movable part of the mold on the plane of the connector; in fig. 2 — node 1 in FIG. one; in fig. 3 - section A — A in FIG. one; in fig. 4 - section B— “B in FIG. 1 (the form in the closed state); in fig. 5 — section B — B in FIG. 1 (form disclosed).

Injection mold contains a punch 1 and a fixed matrix 2 (Fig. 3) forming the forming cavity, located in the holder 3 a movable insert 4 is wedge-shaped, on the side surface of which there are grooves forming the distributor gate 5 of the gating system, the first inlet gates 6 and the second inlet gates 7 for tunnel sprues, through which the second pair of forming cavities is poured, sprue bushing 8, centrally located sprue insert

9, placed in the cage 3, in which grooves are made in the plane of the connector of the form, forming a feed gate

10, communicated with the distribution channel 5, and the hook 11 gating system.

The movable liner 4 is rigidly connected with the drive movement of the inclined column 12 (Fig. 4), which has an axis 13, ensuring the fit of the liner 4 in the holder 3 and placed in the groove 14, parallel to the plane of the connector, in the gate ejection plate 15, with which the ejector 16 sprues. Pushers 17 for removing products that have a flat end 18 are rigidly connected to the product ejection plate 19, which interacts with the gate ejection plate 15 and through the plate 20 with the support of the injection molding machine (not shown).

To hold the gating system in the cage 3, two hooks 21 are made, the central ejector 22 (FIG. 3) is rigidly connected to the product pushing plate 19. Plate 15 ejection gates installed

at a distance from the plate 19 pushing products exceeding the height of the molding cavity.

Injection form works as follows.

When closed, the polymer material through the sprue bushing 8 through the distributing and supplying gating channels 5 and 10 and through the inlet gating channels 6 and 7 enters the forming cavity, where the molding of products 23 takes place. When opened, the movable part of the injection mold departs with the molded product 23 from Matrix 2 and bumps the support of the injection molding machine. While the plates 19 and 20 pushing out move the pushers 17, the sprues break off and the product 23 is removed. With further movement, the push plate 19 pushes onto the gate pushing plate 15, drives the ejector 16 and moves through the inclined column 12 - the movable liner 4. The last moves away from the gating system, which is held while the hooks 11 and 21, then with the full release of the ejector 16 and 22 remove the gating system from the nests of the hooks 11 and 21.

Duty cycle ends. The form closes and is ready for the next work cycle.

The proposed mold allows you to work in automatic mode, since the pushers 17 push the part 23 under the open plane, the hooks 11 and 21 stabilize the gating system, during the movement of the movable liner 4. Due to the presence of two ejection systems, working in series with an interval exceeding the height of the part, there is a reliable separation of the sprues and the loss of parts and gating systems from the mold.

The proposed injection mold provides for filling more long products having a length to width ratio of more than ten by filling the material under the part with the help of tunnel sprues while simultaneously filling more than two products, mainly four. When lengthening the rolling liner 4, the number of manufactured products can be increased.

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FIG. 3

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FIG. four

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Fig 5

Claims (1)

CASTING FORM FOR THE PRODUCTION OF PRODUCTS FROM POLYMERIC MATERIALS, containing a punch and a fixed matrix, forming a forming cavity, a gating system in the form of distributing and inlet channels, an ejection sprue plate, an ejection plate for products, a movable liner equipped with a displacement drive, made in the shape of sprues, an ejection plate of products, a movable liner, equipped with a displacement drive, made in the form of sprues, an ejection plate of products, a movable liner equipped with a displacement drive, made in the form of an sprue, an ejection plate of products, a movable liner equipped with a displacement drive, made in the form of sprues, an ejection plate of products, a movable liner, equipped with a displacement drive, made in the form of sprues, an ejection plate, products, a movable liner, equipped with a displacement drive, made in the form of sprues, an ejection plate, products, a movable liner, equipped with a displacement drive made in the form of an axis, a disposable housing. slot of the gate ejection plate parallel to the plane of the injection mold connector, characterized in that in order to expand the technological capabilities of the injection mold by providing molded I long products, it is equipped with hooks gating system and a centrally located gating insert with a supply channel located in the plane of the form connector, moreover, the movable liner is wedge-shaped and has grooves on the side surface for the formation of expansion and inlet channels for tunnel sprues connected to the supply channel, and the gate ejection plate is installed at a distance from the plate ejection of products exceeding the height of the forming cavity. 1171337 one