SU937181A2 - Casting mould for producing hollow polymeric articles - Google Patents

Description

(5) CASTING FORM FOR CUSTOMIZED HOLLOW

, one

The invention relates to the processing of plastics and can be used for the manufacture of articles with a curved hole.

. According to the main auth. No. 73058 s is known for casting a mold containing a movable and stationary half-form, a traverse with signs fixed in it that define the product cavity, the main lever system, the arms of which are hinged with one end on the half-molds, and the other end is hinged with each other and with the striking plate, t gu, hinged on the cross beam, and located symmetrically to the main lever system relative to the longitudinal axis of the form additional lever system, the levers of which at one end are hinged interconnected ° and with a pull, and with the other end connected to the hinges of fastening the main linkage system with the half-molds L1. POLYMERIC PRODUCTS

However, in a known injection mold, it is not possible to manufacture articles with a curvilinear hole.

The purpose of the invention is to provide for the removal of articles from curvilinear forming marks.

The goal is achieved by the fact that the casting mold is provided with a puller mounted on the pushing bar, with stoppers of the additional lever system fixed on the half-forms in which the grooves are made and in them spring-loaded common joints of the main and additional lever systems are mounted for movement.

FIG. 1 shows a mold; in fig. 2 shows a section A-A in FIG. in fig. 3 - section bb in FIG. in fig. - view B in FIG. 1.

Claims (1)

The mold for the manufacture of hollow polymer products contains a movable 1 and a fixed 2 half-molds, which define the outer surface 39 of the product with semi-matrices. The inner surface is formed by the designating mark 3 reinforced on the cross bar k, which is connected by a 5 and an axis 6 with an additional lever system 7The main lever system B is connected by an axis 9 with a pushing bar 10 on which the puller 1 of the product is installed, having a passage hole forming sign. The main and additional linkage mechanisms via axes 12 interact with the groove 13 tons 5 and 5, their common hinges 1 are installed in the slots 15 with the ability to move along the longitudinal axis of the form by 0.5 N and are spring-loaded by elements 1b. The grooves 15 are made in half-molds on which the stoppers are fastened 17. The casting mold works as follows. After injection of the polymer melt and the corresponding technological exposure under pressure, the injection mold is opened. The half-molds 1 and 2 are consumed, freeing the outer surface of the product, and the stopper 17, interacting with the additional lever system 7, keeps both lever systems 7 and 8 from operating. In doing so, the hinges 1, compressing the springs 16, move along the grooves 15 along the longitudinal axis of the mold. After the half-molds 1 and 2 are opened by the value H, which ensures complete release of the outer surface of the product, the additional lever system 7 disengages from the stopper 17 and is driven by the movable half-form 1 through the axis 6, the pull 5 and the yoke +. moves the forming marks 3 down, while the lever system 8 through the axis 9 raises the push bar 10 up. The axes 12 move in the groove 13 and stabilize the operation of the lever systems 7 and 8. The expansion of the injection mold continues to those. until the puller 11 moves the product to a position where it falls under its own weight into the hopper. After the product is pushed, molds 1 and 2 close. At the same time, at the beginning of the spring 1b, the hinges are set to the extreme position, after which the half-form 1, by means of the lever systems 7 and 8, moves the forming sign 3 and pushes the strip 10 in the opposite direction until it is set to its original position. Then the cycle repeats. The application of the proposed form will make it possible to manufacture products with curved holes with high productivity. Invention Molding form for and; grease hollow polymer products according to author. No. 73058 4, characterized in that, in order to ensure the removal of products from curvilinear forming marks, it is provided with a puller mounted on the collating plate, with an additional lever system stoppers fixed on the floor, in which the grooves are made, and installed in them with the ability to move the spring-loaded common joints of the primary and secondary lever systems. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 73058, cl. In 29 C 5/00, 1978 (prototype). . at and FIG. 2 BuSB Fig A