SU1260231A1 - Mould for manufacturing polymeric articles - Google Patents

Description

The invention relates to the processing of polymeric materials and can be used for the manufacture of products with the separation of sprues.

The aim of the invention is to increase the reliability of sprue removal.

FIG. 1 shows the shape, section; in fig. 2 shows section A-A in FIG. one; in fig. 3 - the form at the time of separation of the gate from the product.

The form contains a fixed half-form 1, a plate 2 of the dies connected to the base plate 3 and made with runner channels 4. In the push plates 5, the product ejector 6 is mounted with limited movement relative to them and the shank 7 can contact the base 8. For this The ejection plates 5 are provided with a cavity for the collar located in the middle part of the shank 7. In the slab 2 of the dies, a rotary insert 9 is installed with an inlet sprue channel with a sharp KpoMj core. An inlet sprue channel with a sharp edge 10 is made in the liner 11. In addition, a central ejector of the sprue and a pusher 12 are fixed in the ejection plates to interact with the driver 13 fixed in the rotary insert in the radial direction.

Such a constructive solution will ensure a follower: $$ s $ s: -s $$$ mm $

ejection of the sprue, and then the product, separation of the sprue from the product by a swivel

The form works as follows. After polymer injection and processing time, the mold is opened.

The shank hits the stop of the casting machine, stopping the ejection plate 5, while the ejector of the central sprue starts to be removed from the matrix plate, and the rotary insert rotates through the leash 13, cutting off the sharp edge of the sprue. The product at this time remains in the form, since the ejector 6 does not select a free stroke.

By the time the sprue separates, the pushers 6, due to the collar on the shank, stop and remove the product from the mold. The gate under the influence of the central ejector is bent, pulled out from the rotary insert 9 and removed from the mold. The rotation of the rotatable insert 9 is limited by a driver interacting with a bevel on the die plate.

When closing the shape of the plate, the pusher, due to the interaction of the pusher 12 with the fixed half-form 1, returns to its original position. Swivel insert in a similar way (due to the interaction of the fixed half-form with a leash) takes the original position.

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Claims (1)

INJECTION FORM FOR MANUFACTURE OF POLYMERIC PRODUCTS, containing a fixed half-mold, matrix plate, base plate, base plate, ejector plates with ejectors_ and a rotary insert with an inlet sprue channel, characterized in that, in order to increase the reliability of the removal of the gate, the mold is equipped with a push plate installed in the ejector plates and the insert is made in the form of a cylindrical element with a radially located leash for interaction with the pusher, while the ejectors are installed in the plates pushed with the possibility of limited movement relative to them and with the possibility of contact of its shank with the base, and the inlet sprue channel is made with a sharp edge.