SU952627A1 - Mould for making polymeric articles - Google Patents

Description

(54) CASTING FORM FOR MANUFACTURING POLYMERIC PRODUCTS

This invention relates to reprocessing plastics into articles, in particular to injection molds for the manufacture of articles from polymeric materials.

A known casting mold for the manufacture of polymer products, comprising a fixed gating plate, inclined columns fixed therein, movable plates including a punch plate, a base, a pusher plate and semi-matrices that interact with inclined columns and are made with inclined surfaces from the base side for accelerated return of the pushers. 111.

The disadvantage of the mold is the low productivity due to the fact that the connector of semi-matrices made using inclined columns is possible only in single-piece molds. .

The closest to the image of the technical essence is a mold for the manufacture of polymer products, containing a fixed gating plate, a movable plate with detachable semi-matrix, placed in the inclined grooves of the movable plate and mounted at an angle to

the plane of the connector of the semi-matrix ejector, one end of which is: rigidly connected with the semi-matrix, and the other end in contact with the plate of the ejector 21-.

The mold is multi-seat, but its productivity is also low. This is due to the fact that when installing the ejectors at equal angles of inclination to the plane of the semi-matrix connector, the latter must be arranged in pairs, with a gap between the pairs, and therefore the design slots can be made only on one side surface of each semi-matrix. Increased productivity is possible due to the introduction of additional semi-matrix pairs, which leads to an increase in the size and weight of the injection mold.

The purpose of the invention is to increase productivity by increasing the nesting rate without changing the size of the form.

Claims (2)

This goal is achieved by the fact that in the Molding form for the manufacture of polymer products containing a fixed litmic plate, a movable plate with detachable semi-matrices, placed in inclined grooves of the movable plate and installed at an angle to the plane of the semi-matrix pushers, one ends of which are rigidly connected to the semi-matrix, and the other ends are in contact with the pusher plate, the angle of inclination of each subsequent pusher to the plane of the connector along humatrits is greater than the angle of inclination of the previous pusher. FIG. 1 shows the casting form in the closed position, a longitudinal section; in fig. 2 the same, in the open position, at the moment of resetting the product in FIG. 3 - section AA on fi 1.. The casting mold contains a fixed gating plate 1, a movable plate 2 with decorating cavities 3, a movable plate 4 with separable and semi-matrix 5 and inclined grooves b, placed in the grooves 6 ejectors 7, one ends of which are rigidly connected with semi-matrix 5, and others the ends are in contact with the plate 8 and are located in its longitudinal groove 9. The plate 8 is connected by means of 10 with a plate 11 in which the pushers 12, the counter pusher 13 and the ejector 14 of the sprue are installed, and the base 15 has the shank 16 with the spring 17. Signs 18 placed in a movable plate 4 floor matrix 5, the side surfaces of which are made Layout guides nest 19.Ugol inclination of each subsequent ejector 7 to the parting plane jaws 5 greater inclination previous present ejector 7. The mold works as follows. After the completion of the casting process, the mom opens. The movable part of the mold departs from the fixed casting plate 1. In the process of opening, the shank 16 of the plate 11 of the pushers 12 hits the fixed support of the machine and stops. Together with the plate 11 of the pusher, the ejector 14 of the sprue stops, opening and dropping the gating system. Upon further movement of the movable plate 2, it pushes against the pushers 12 and stops, freeing a part of the product. In a further process of opening the molds, the plate 8 of the ejectors 7 slides over the plate 11 of the pushers 12 and stops. In this case, the semi-matrix 5 moves through the ejector 7, sliding along the longitudinal groove 9 of the plate 8 of the ejector 7 and interacting with the inclined slots b of the plate 4 of the semi-matrix 5. In this case the semi-matrix 5 moves relative to each other, the product is removed from the sign 18, and released . After removing the product, the mold closes. The movable part of the mold begins to return movement. At the same time, the counter-pusher 13, after pushing onto the fixed gating plate 1, stops the plate 8 of the ejectors 7 through the traction 10, which, interacting with the ejectors 7, returns to the starting position of the half-matrix 5. Subsequently 5 comes in contact with the movable plate 2. From this moment the form is ready for work. In order to increase the reliability of the mold operation, a spring 17 is installed, which ensures the contact of the semi-matrix 5 with the movable plate 2 at the last moment of the form closing. The proposed casting mold, due to the installation of each subsequent ejector, at an angle to the plane of the connector with a larger angle of inclination of the previous ejector, allows the semi-matrices to be installed in series and make decorating slots on both side surfaces of each semi-matrix and thereby increase the productivity of the injection mold without changing the shape of the mold. . Formula of the Injection Molding mold for the manufacture of polymeric products comprising a fixed casting plate, a movable plate with split semi-matrices placed in inclined grooves of the movable plate and set at an angle to the plane of the connector of semi-matrix ejector, one ends of which are rigidly connected to the semi-matrix and the other ends in contact with the pusher plate, characterized in that, in order to increase productivity by increasing the nesting rate without changing the dimensions of the form, the angle of inclination of each. Alkivatel to the plane of semi-matrix is greater than the angle of inclination of the previous ejector. Sources of information taken into account during the examination 1. USSR author's certificate No. 691309, cl. B 29 C 5/00, 1978. 2.Ivanov V.K. Designing automatic injection molds for thermoplastic parts. L., Leningrad House of Scientific and Technical Propaganda, 1970, p. 24, FIG. 15 (prototype). u ////////// l .1