SU793776A1 - Mould for making polymeric articles - Google Patents

Description

one

The invention relates to a device for the manufacture of articles from polymeric materials by injection molding and is applicable in the polymer processing industry.

A known casting mold for the manufacture of products from polymeric materials, comprising a stationary zero-form and a movable one, including plates of dies and ejectors, throwers for pushing products, a mechanism for moving throwers 1.

The closest technical solution to the described invention is a casting mold for the manufacture of polymer products, containing a fixed zero shape and a movable, including plates of dies and ejectors, throwers for pushing products stuck on the ejector, each of which is made in the form of a tensioned flexible element fixed with ends on the mechanisms of movement of the flexible element located on opposite sides of the moving mold 2.

In a known form, the movement mechanism of the flexible element is designed as a link with a finger groove, and the finger is fixed on the pusher plate, therefore the angle of inclination of the slide is limited by

pusher plate movement. Therefore, the known form cannot be used at any location of the forming nests.

The purpose of the invention is to expand the technological capabilities by increasing the magnitude of the movement of the ejector.

The goal is achieved by the fact that

injection molds for the manufacture of polymer products containing a stationary, lufoform and mobile, including plates of dies and ejectors, throwers for pushing products sticking to the ejector, each of which is made in the form of a tensioned flexible element fixed by the ends on the mechanisms for moving the flexible element, located on opposite sides of the movable half-form according to the invention, the mechanism for moving the dumper is made in the form of a spring-loaded slider, and on the movable half-form is fixed n wedge for engagement with a spring-loaded slider.

FIG. Figure 1 shows the casting mold in a closed state with a mechanism for removing items from ejectors; in fig. 2 - the same, top view; in fig. 3 - the form at the time of the connector after a full ejection

products from decorating nests; in fig. 4 - view of the moving half-form.

The casting mold contains a movable 1 and a fixed 2 half-molds with decorating nests 3. Under the decorating nests 3 there are ejectors 4 installed in the plates 5 of the ejectors. Sliders 6 are fixed on the movable mold 1, spring-loaded 7, and a wedge 8 is fixed on the fixed mold 2. On the slider 6 there is a snubber, made in the form of a tensioned flexible element 9, located along the plane of the connector half-molds 1, 2 in the groove 10, made in a fixed half-form 2. The removable element is designed as a cable or a rubber harness that connects slider 6 in pairs, movably mounted on opposite ends of the movable half-form 1.

The operation of the mold is carried out as follows. The product is decorated and hardens in the design slots 3. After this, the movable half-form 1 moves away from the fixed 2, and the ejector 4 pushes the products 11 out of the design sockets 3. In this case, the wedge 8, which pushes spring-loaded spring 7 sliders 6 into the inoperative position, out of touch with them. Under the action of the spring 7, the sliders 6, together with the ejector 9 attached to them, move to the axis of the mold and the Defeaters 9 eject the products left on the ejector 4. The resetter 9 couples in pairs slides 6, movably mounted on opposite ends of the movable half-form 1.

This design of the mechanism for moving the dumper ensures the discharge of products from the pushers over the entire area of the connector of the mold, which makes it possible to increase the productivity of the injection mold and makes it possible to extend the product range.

Claims (2)

Invention Formula Casting mold for the manufacture of polymer products, containing a fixed half-form and a movable, including dies and ejector plates, ejector devices for pushing products sticking to the ejectors, each of which is made in the form of a tensioned flexible element fixed to the ends of the mechanisms movement of the flexible element located on opposite sides of the movable half-form, characterized in that, in order to expand technological capabilities by increasing the amount of movement of the ejector, the movement mechanism of the ejector is in the form of a spring-loaded slider, and a wedge is fixed on the fixed half-form for interaction with the spring-loaded slider. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 587006, cl. B 29C 5/00, 1976. 2. USSR author's certificate in application number 2610878 / 23-05, cl. In 29C 5/00, 1978 (prototype).