SU1500491A1 - Casting mould for polymeric articles - Google Patents

Abstract

The invention relates to the processing of plastics into products. The purpose of the invention is to simplify the construction of the mold. This goal is achieved by the fact that in an injection mold containing a stationary part and a movable part connected to the base, the ejector and the mechanism and mechanism for dropping products sticking to the ejector with a stem that brakes interacting with the hole in the base, the end of the rod is pointed along the axis 2-4 lobes bent away from the axis, and made with the possibility of the petals entering when they approach the hole of the base 12 and exit from it with increased force (friction). 2 Il.

Description

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The invention relates to the processing of plastics into products.

The purpose of the invention is to simplify the construction of the mold.

Fig. 1 shows a casting mold, to reveal a longitudinal section; 2, a form in the completion stage of the disclosure, a longitudinal section.

The casting mold contains a fixed part in the composition of the base plate 1 and the plate 2 of the sign holder and a movable part in the composition of the punch 3 rigidly connected to the base 4, plates 5 and 6, fastened together, and the plate 6 is attached to the shank 7. In the hole of the plate 5 is placed with the possibility of axial movement of the right beaded end of the ejector 8, spring-loaded spring 9 from the plate 6 towards the plate 2. To the exact end of the ejector ejector axially attached rod 10, the free end of which is pointed under angle 60, incised along the axis on the 4 petals 11 and located in the hole 12 of the base 4 in the initial state of the form In the free position, i.e. outside the hole 12, the petals 11 due to the spring properties of the metal and the corresponding design (bend) are moved apart from the axis.

Since the diameter d of the hole 12 is smaller than the diameter D of the divergence of the petals 11, they enter the hole, shifting, and out of it with force; d 6 mm, D 6.5 mm.

The form works as follows: In the original (undisclosed) state

Research Institute of the form of the ejector 8, is

in the state of abutment into plate 2, melted in plate 5, spring 9 is most compressed, stem petals 11 are located in hole 12. After the polymeric material is poured into the mold cavity and cooled, the movable part of the mold moves away from the stationary one. First, the product is released from the plate 2 o Then the shank 7 stops against the stop of the injection molding machine and stops the plates 5 and 6. The punch 3 and the base 4 continue to move, while the punch is released from the product, the base 4 comes off the stem petals 10, spring 9, distrib. Camping, pushing the ejector. When abruptly stopping against the edge of the hole in which the right end of the ejector is placed, the latter is freed from the product: it flies out of the ejector - inertia.

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Claims (1)

Invention Formula A mold for polymeric products, comprising a fixed part and a movable part rigidly connected with the base, ejectors and a mechanism for dropping the products stuck on the ejectors with a stem that interacts with the hole of the base, in order to simplify the design , the end of the stem is pointed, notched along the axis of not less than two petals bent away from the axis, and made with the possibility of the petals entering the hole in the base and exiting from it with a reduced force.