SU716841A1 - Mould for polymeric articles - Google Patents

Description

one

This invention relates to the field of plastics processing into products.

The known form for the manufacture of polymer products, containing a matrix, forming marks with threaded shanks connected through gears with a drive rail and ejector 1.

The closest technical solution is a casting mold for polymeric products containing a fixed gating plate, movable plates including a matrix plate, rigidly connected to the base, and an ejector plate between them, and an intermediate plate, and basic symbols 2.

Known shapes contain markers for shaping the internal cavity of the product and ejectors made in separate pieces.

This complicates the design of the form.

The purpose of the invention is to simplify the design of the mold by combining the forming marks with ejector pins when molding the openings of an elongated cross section in the articles.

The goal is achieved by the fact that the form is equipped with an L-shaped lever with a roller hinged on a plate with ejectors, a wedge mounted on an intermediate plate that interacts with the G-arm roller, and an ejector rotation mechanism made in the form of additional wedges mounted on the intermediate plate, and the ejector plates of the six-pin ejector, fixed on the extractors, and the gear racks interacting with the gear wheels and additional wedges.

FIG. 1 shows a casting mold (longitudinal section), FIG. 2 - drive of the mechanism of rotation of the ejector, section BB of FIG. one; in fig. 3 position of the ejector after turning relative to the product.

0

The casting mold contains a fixed gating plate 1, a plate 2 of dies associated with the base 3, an intermediate plate 4, a plate 5 with ejectors 6 ...

On the slab 5 and on the bar x 7, the l-shaped lever 8 is hinged together with the roller 9 on its end, mutually 0

: acting with wedge 10 set in intermediate HJfiHTe 4.

The mechanism of rotation of the ejector is made in the form of gears 11, secured on the ejector 6, gear racks 12 and additional wedges 13 and 14 installed in the intermediate plate 4,

In the intermediate plate is placed the stop 15, limiting the movement of

plate 5, which fixation in

the molding of the product is carried out by a plate 16 and a roller 9,

Casting form works as follows.

After injection into the closed form of the material and the corresponding shutter speeds, the POU is exposed and its movable part departs from the fixed plate 1.

When disclosing the form of the gap 4, interacting with the emphasis on pouring the yo-yo machine, it passes the ddanija plate 5 to the wedge 10 through the roller 9: to the lever 8, turning it around the axis fixed to the bar x 7.

The plate 5 is moved to the stop 15, and the ejectors b come out of products.

Then the wedge 13 of the gear rack 12 moves and rotates the ejector through the gears 11 through an angle of 45 135 ° 4. In this case, the ejectors spread across the groove of the product.

Then the plate 5 with turn B1: the gears B moves in the direction to the product together with the plate 4 and the ejectors, acting on the ends of the products, remove them from the fory.

When the rail-12 is closed, the wedge 14 moves to its initial position, and the wedge 10 acts on the roller with surface a and returns the plate 5 and ejectors to the initial position. Then the cycle repeats.

Ejection of products with rotated ejector is used in casting.

products in which traces of ejector are allowed, or in the manufacture of small products, the end surface of which does not allow the use of signs forming the inner cavity and ejector simultaneously.

Claims (2)

1. A mold for polymer articles, containing a fixed gating plate, movable plates including a matrix plate, rigidly connected to the base, and a plate with ejectors placed between them and an intermediate plate and forming marks, which, in order to simplify the design due to the combination of forming marks with ejectors when forming holes in the products of oblong section, they are equipped with an L-shaped lever with a roller hinged on the plate with ejectors, a wedge mounted on internal plate veaimodeyst- vuyuschim with roller L-shaped lever and the mechanism of rotation of the ejector. 2. The casting mold according to claim 1, characterized in that the mechanism for rotating the ejectors is made in the form of additional wedges mounted on the intermediate plate and placed in the plate of ejector gears mounted on the ejector and gear racks that interact with gears and additional wedge me. Sources of information taken into account in the examination 1. USSR author's certificate number 426849, cl. B 29 C 1/14, 1972. 2. Authors certificate of the USSR 258564, cl. In 29 C 7/00, 1966 - (prototype). 2 15 Fshz