SU981001A1

SU981001A1 - Casting mould for thermoplastic articles

Info

Publication number: SU981001A1
Application number: SU813312427A
Authority: SU
Inventors: Алексей Васильевич Богородский; Всеволод Александрович Ссорин; Евгений Борисович Штерн
Original assignee: Ярославский Электромашиностроительный Завод
Priority date: 1981-07-06
Filing date: 1981-07-06
Publication date: 1982-12-15

Description

{S) ЛИТЬЕВАЯ ФотА дл ИЗДЕЛИЙ{S) CAST FOTA FOR PRODUCTS

из ТЕРМОПЛАСТОВfrom THERMOPLAST

1one

Изобретение относитс к переработке термопластов и может быть использовано дл изготовлени из них изделий с боковыми поднутрени ми.The invention relates to the processing of thermoplastics and can be used for the manufacture of products with lateral undercuts.

Известна литьева форма дл полимерных изделий с поднутрени ми, содержаща подвижную и неподвижную полуформы и шарнирно закрепленный в подвижной полуформе рычаг, св занный с оформл ющим поднутрение знаком П.,toA casting mold for polymeric articles with undercuts is known, comprising movable and stationary half-molds and a lever hinged in the movable half-form, connected with the undercut sign P., to

Наиболее близка к изобретению литьева форма дл изделий из термопластов , содержаща неподвижную литниковую плиту с запорными элементами, систему подвижных плит, на одной из is которых шарнирно закреплен с возможностью взаимодействи с запорными элементами подпружиненный рычаг с боковым оформл ющим знакомf 2.Closest to the invention is a mold for products made from thermoplastics, containing a fixed gating plate with locking elements, a system of moving plates, one of which is pivotally fixed with the ability to interact with the locking elements with a spring-loaded lever with a lateral sign f 2.

Однако в известных формах невозмож- о но изготовление изделий с боковыми стенками незамкнутыми по периметру, поскольку дл формовани участков издели без боковых стенок необходимоHowever, in known forms, it is impossible to manufacture products with side walls that are not closed around the perimeter, since for forming areas of the product without side walls

сопр жение пуансона с матрицей с минимальным зазором, предотвращающим облой, при этом неизбежен износ пуансона и вследствие этого увеличение зазора.mating the punch with the die with a minimum gap, preventing burrs, while the punch is inevitable and, consequently, an increase in the gap.

Цель изобретени - расширение технологических возкюжностей литьевой формы,The purpose of the invention is to expand the technological capabilities of the injection mold,

Поставленна цель достигаетс тем, что в литьевой форме дл изделий из термопластов, содержэдей неподвижную литниковую плиту с запорными элементами , пуансон, выталкиватели и систему подвижных плит, на одной из которых шарнирно закреплен с возможностью взаимодействи с запорными элементами подпружиненный рычаг с боковым оформл ющим знаком, пуансон св зан с неподвижной литниковой плитой посредством направл ющих колонок, а рычаг, выполнен с оформл ющим участком и , впускным литниковым каналом.The goal is achieved by the fact that, in a mold for thermoplastic products, contain a fixed gating plate with locking elements, a punch, ejectors and a system of moving plates, one of which is pivotally fixed with the ability to interact with the locking elements with a spring-loaded lever with a lateral sign, the punch is connected to the fixed gating plate via guide columns, and the lever is provided with the decorating section and the inlet gating channel.

Claims

FIG. 1 shows the shape, section; in fig. 2 - the same, at the time of removal I8398100 Delhi; ma 1) ig. 3 is a section A-A in FIG. 1. The casting mold contains a fixed gating plate 1 with locking elements in the form of wedges 2 with wear-resistant 5 lining plates 3, a punch k associated with the gating plate 1 by means of column guides {5) and a system of movable plates comprising a plate-matrix 7, rigidly connected with the base plate 8, on which it is pivotally connected with wedges 2 fixed on the axes 9 installed with a radial clearance, under-spring-loaded levers 10, made with lateral signs 11 and ycha Stop 1 12 and inlet gating channels 13, ejection plates Not piped by 1 pushers 15 and by a needles merchant 16, base 17 with decorating signs 18. Podtniki 19 levers 10, spring-loaded with power elements, Tami 20, are coupled with pressure screws 21, with respect to the gating plate 25, the punch k is spring-loaded with the power elements 22. The forming cavity for the product 23 is formed by a plate-matrix 7, the design sections 12 of the levers 10 and the punch. ,, 30 The mold is as follows. After injection of the thermoplastic melt and technological exposure, the mold is opened to form a split between the punch and the casting plate 1, the inlet gates being separated from the spreading levers 10, and the separating gates are removed by the ejector pushes. Next, the levers 10 4c under the action The force elements 20 14 are retracted from the punch 4, which stops by the limiters 6, and a connector is formed between the punch k and the matrix plate 7, and the product 23 is removed from the shape by tubular ejection of the pins 15 by the interaction xv stovika 16 injection molding machine, with emphasis. Following this, the mold closes, and the cycle repeats. Using the invention allows to expand the technological capabilities of the equipment. Claims of the Injection Mold for thermoplastic products containing a fixed runner plate with locking elements, a punch, ejectors and a system of movable plates, one of which pivotally mounted with the ability to interact with the locking elements of a spring-loaded lever with a lateral clearance sign, which is different in that, in order to expand technological POSSIBILITY shape, the punch is coupled to the fixed plate through the sprue guide columns, and the lever configured Layout yutsim portion and the inlet runner. Sources of information taken into account in the examination of N.N. Construction of molds for plastics, M.-L., Mashinostroenie, 1966, p. 96, fig. 556.

2. USSR author's certificate N °, class B 29 C 5/00, 1977 (prototype).

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