RU1819221C - Polymeric article mould - Google Patents

Abstract

Purpose: plastic processing by injection molding with improved product quality. SUMMARY OF THE INVENTION: the central forming insert is provided with recesses for engaging the upper part of the central insert, the tunnel gate is made in the side wall of the forming insert. The outlet of the tunnel channel is located at the level of the bottom of the forming cavity of the matrix, 1 zpp-l, 1 silt.

Description

The invention relates to the field of plastic processing by injection molding and can be used in the manufacture of tools for molding products such as casings, housings and pads in hardware.

The aim of the invention is to improve product quality. .

The drawing shows an injection mold, section. .-

The injection mold for the manufacture of products from polymeric materials contains a matrix T matrix with molding inserts 2 and a sprue sleeve 3 installed in it. A recess 4 is made in the molding insert of the matrix to enter the upper part 5 of the central insert 6. A tunnel gate is made on the side walls 7 of the molding insert 2. 8, the outlet opening 9 of which is located at the level of the bottom 10 of the forming cavity 11 of the matrix. In the punch holder 12, punches 13 and a central insert 6 are installed in which the feed channel 14 of the gate system is made

15. In the plane of the mold connector 16, ventilation ducts 17 are made of an ejector system with ejectors 18 of the sprue system 15 and ejectors 19 of the article 20 are suspended in a punch holder 12.

The operation of the mold is as follows.

After the mold is closed, the plastic is injected into the forming cavity 11. In this case, the melt through the opening of the sprue sleeve 3 enters the distributing channels 14 made in the central insert 6. Next, the melt through the tunnel gate 8, made in the side walls 7 of the forming insert 2, comes through the hole 9 into the bottom 10 of the forming cavity 11 of the matrix and filling it displaces the air towards the plane of the mold connector 16 and ventilation ducts 17. After technological exposure, the mold opens. In this case, the punch holder 1Y with punches 13 and the central insert 6 together with the ejection system with

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Kivatep my Sh.; 19 moves away from the matrix plate 1 ;; At the moment of opening

separating the tunnel sprue 8 from the publishing house GM20, and the sprue system 15, remaining on the Center Yutavk 6. departs with it from the matrix plate 1. Upon further opening of the injection mold, the eject system “with 18,19 pushes against a stationary feed mill 41 takes off the product 20 and casting sprue; sStg € mm.SW After atbro workM iMHIW riOeTpjjiBel C v:,; :: V- -v. -.v. y;. ;;;

; In the “4th method 41% ®leH11 - Forming insert of the matrix for accessing the upper part of the central insert and the tunnel sprue, the 6 lateral central forming BC: ria8KH yielded in 20 most remote from the plane of the connector and the ventilation ducts of the mold, thereby

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Claims (2)

1. Injection mold for the manufacture of products from polymeric materials, comprising a matrix plate with forming inserts, a punched runner) system with a tunnel runner, which protrudes from the center of the connector to the central insert. on the upper part of which there is a sprue runner of the sprue system, with the exception that in order to improve the quality of products, the central forming insert of the matrix is made with recesses for the entry of the upper part of the central insert, and the tunnel sprue embossed in the side wall of the central mouthpiece of the mouthpiece; 2. The form according to n.i, about t l and h; and with the fact that the exit hole of the twin-shaft dgog kbnaya is located at the bottom level forming the matrix cavity. & t ; : ft "7; if.