SU956280A1 - Casting mould for producing reinforced articles from polymeric materials - Google Patents

Description

The invention relates to devices for the manufacture of products from polymeric materials, in particular to injection molds for the production of reinforced cases of optical instruments. ^s

Known injection molding form, comprising a housing with a runner system and with a cylindrical inner cavity, a lid provided with a guide edge ₁₀ tsentriru- [1]. Before casting into the mold is introduced with the lens elements dividing centering edges crimped cover all the internal elements, and then introduced into the for- ₁₅ mu liquid polymer material forming a monolithic body after solidification.

Its disadvantage is the need for a set of high-precision jo centering rings for each product.

Known (Which is closest to the invention, an injection mold containing upper yuk and lower plates and side walls made with coaxially arranged radial holes, fixing elements with surfaces centering the reinforcement, located in the radial holes of the plates and side walls [2].

In this form, fixing of reinforcement having undercuts, for example, in., Is not ensured; as a concave surface.

The aim of the invention is the provision of fixation of the reinforcement in the form of negative lenses in the manufacture of multi-lens.

This is achieved by the fact that in the form containing the upper and lower plates and side walls made with coaxially arranged radial holes, · fixing elements with centering- reinforcing surfaces placed in the radial holes of the plates and side walls, each fixing element in contact with vog95628Ό '4 with the inner surface of the lens, made in the form of three conjugated inserts ^ the middle of which has the shape of a wedge.

Wedge inserts allow the parts of the locking 5 elements to be pushed apart and shifted in the axial direction and provide the output of the locking elements from the inner cavity of the mold.

In FIG. 1 shows the proposed 10 form, a longitudinal section; in FIG. 2 a section A-A of FIG. 1; in FIG. 3 - view of the finished product.

It comprises an upper mold 1 and lower plate 2, side walls 3 and 4, in which openings 5 and 6. The holes 5 and 6 are arranged movable locking members 7 and the component fixing elements in contact with the concave surface of the negative lens _m and constructed as three paired liners 8, 9 and 10, and the liner 9 has the shape of a wedge. In the plates 1 and 2, the reinforcing edges 25 11 and 12 and the tapered sprue holes 13 are made. The mold also contains a cover 14.

The device operates as follows.

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First, the first lens 15 is loaded into the internal cavity of the mold, then inserts 8, 9 and 10 are inserted into the holes 5. Next, the lens 16 is inserted, fixing it with the liner 10 and the fixing element 7 "The process ^{35 is} repeated until all lenses are centered. After that, the mold is closed with a lid 14, which presses the last lens 17 with its fixing | edge to the fixing element 7 · Next, liquid polymer material is fed into the mold cavity through the sprue holes 13, which forms a strong outer body (see Fig. 3) of the lens after solidification.

Using the form made according to the invention will make it possible to produce multi-lenses with a V set of lenses, including negative lenses.

Claims (2)

the worn surface of the lens is made in the form of three adjoining liners, the middle of which has the shape of a wedge. The wedge liners allow you to move the parts of the sealing elements in the axial direction and move the fixing elements out of the internal cavity of the mold. FIG. 1 shows the proposed form, a longitudinal section; in fig. 2, section A-A of FIG. one; in fig. 3 view of the finished product. The mold contains the top 1 and bottom 2 plates, side stacks 3 and 4, in which holes 5 and 6 are made. In holes 5 and 6 there are movable locking elements 7 and composite locking elements in contact with the concave surface of the negative lens and made in the form of three adjoining liners 8, 9 and 10, and the liner 9 has the shape of a wedge. In plates 1 and 2 are made fixing the reinforcement edges 11 and 12 and the tapered gating holes 13. The form also contains the cover I. The device works as follows. Initially, the first lens 15 is loaded into the internal cavity, then inserts 8, 9, and 10 are inserted into the holes 5. Then the lens 16 is inserted into the holes, fixing it with the liner 10 and the locking element 7. The process is repeated until all the lenses are centered. After this, the mold is closed with a lid 1t, which presses the last lens 17 with its fixing edge, to the fixing element 7 further and the mold cavity through gating holes 13 serves a liquid polymer material, which after solidification forms a strong outer casing (see Fig. 3) of the lens. Using a mold made according to the invention will make it possible to manufacture multi-lens lenses with a set of lenses including negative lenses. The invention The casting mold for the manufacture of reinforced products from polymeric materials, comprising upper and lower plates and side walls made with coaxially arranged radial holes, locking elements with reinforcement-centered surfaces, placed in the radial holes of the plates and side walls, characterized by By the fact that, in order to ensure the fixation of the reinforcement in the form of negative lenses in the manufacture of a multi-lens objective, each fixing element that contacts the concave lens surface, made in the form of three adjoining liners, the middle of which has the shape of a wedge. Sources of information taken into consideration. Upon examination 1.Authorial certificate of the USSR, cl. G 02 B 7/02, 1978. 2. USSR author's certificate number 93367, cl. In 29 N 5/00, 197 (prototype).