SU1227484A2 - Casting mould for polymeric articles - Google Patents

Description

The invention relates to the processing of polymeric materials, can be used for the manufacture of products with curved undercuts and is an improvement of the known device described in the author. No. 1007993.

The purpose of the invention is to expand the technological capabilities of the mold by producing articles with curved undercuts.

Figure 1 shows closed: Shiite form, longitudinal section; figure 2 - section aa in figure 1 (the fixed part of the closed injection mold on the plane of the connector); in FIG. 3, section A-A in FIG. 1 (fixed part of an open injection mold along the plane of the connector)} in FIG. 4 — section B — B in FIG. 2.

The injection mold contains movable 1 and fixed 2 half-molds with semi-matrix 3 and 4, traverse 5, pivotally connected by a pair of levers 6 with brackets 7 movable 1 and fixed 2 half-forms, pusher 8 with detachment sleeve 9, connected to semi-matrix 3 and 4 tons 10, an anchor 11, an extra signs 12 for the curvilinear undercuts and side surfaces of the product, fixed in traverse 5, connected with the interceptor 8 with L-shaped levers 13 and the arms 14 with the traverse 5.

27484. 2

In the fixed half-form 2, a sprue bushing 15 is installed, and in the mobile half-form 1, an extractor 16. The extrusion of additional signs 12 from the injection mold prevents the stops 17, installed on the semi-matrix 3 and 4.

The rigs 14 are pivotally connected to the crosspiece 5 and with additional signs 12, and the L-shaped levers 13 are pivotally connected to the pusher 8 at the point J corresponding to the center of the curvilinear undercuts of the product 18. The casting mold works in the following way.

After injection of the polymeric material and technological exposure, the mold is opened, while the movable 1 half-form is moved to a distance a and the yoke 5 with the help of levers 6 is raised to the & At the same time, the hole forming mark 11 is removed from the product 18 due to the fact that the tons 25 and 10 do not allow the pusher 8 to move vertically relative to the semi-matrix 3 and 4, and the additional signs 12 under the action of the tons 14 turn on the L-shaped The lever 30 bar 13 with respect to the center of curvature of the curved undercuts and completely exits article 18. The product, free from marks, falls into the hopper of the injection molding machine. Ras, f, the cover of the mold is limited to the heads of t g 10. After the shape is closed, the cycle repeats.

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Compiled by S. Strizhen Editor L. Avramenko Tehred I. Veres Proofreader I. Erdeyi

2251/18

Circulation 640 Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab, 4/5

Production and printing company, Uzhgorod, st. Project, 4

tpuff

Claims (1)

INJECTION FORM FOR POLYMERIC PRODUCTS by ed. No. 1007993, characterized in that, in order to expand the technological capabilities of the mold due to the manufacture of products with curvilinear undercuts, the form is equipped with additional L-shaped levers and rods with a traverse with traverses for the design of curved undercuts and side surfaces of the product, and the rods are pivotally connected with a traverse and additional signs, and the L-shaped levers are pivotally connected to the pusher. > TO)