SU804471A1

SU804471A1 - Device for moulding polymeric articles

Info

Publication number: SU804471A1
Application number: SU792707801A
Authority: SU
Inventors: Юрий Константинович Леонов; Валерий Александрович Иванов
Original assignee: Предприятие П/Я А-7374
Priority date: 1979-01-04
Filing date: 1979-01-04
Publication date: 1981-02-15

Description

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Изобретение относитс к переработке полимерных материалов и может найти применение, в частности, при проектировании и изготовлении литьевых форм. The invention relates to the processing of polymeric materials and may find application, in particular, in the design and manufacture of molds.

Известна литьева форма дл изготовлени деталей с арматурой, содержаща подвижную и неподвижную плиты, разъемные боковые полуматрицы, систему выталкивателей с хвостовиком, взаимодействующим с неподвижным упором , и втулку, установленную жестко на подвижной плите формы соосно с хвостовиком Щ.The known casting mold for the manufacture of parts with fittings, containing movable and fixed plates, detachable lateral semi-matrixes, a system of ejectors with a shank that interacts with a fixed stop, and a sleeve rigidly mounted on a movable plate of the shape coaxially with the shank Sch.

Однако данна форма сложна по конструкции . Хвостовик формы снабжен кулачками-захватами, которые удерживАютс в раскрытом положении с помощью пружины. Наличие пружины снижает , надежность работы механизма, так как пружина, подверженна механической усталости , может не раскрыть кулачки, что приведет к их lioj ломке.However, this form is complex in design. The shank of the mold is provided with jaws, which are held in the open position by means of a spring. The presence of the spring reduces the reliability of the mechanism, since the spring, prone to mechanical fatigue, may not open the cams, which will lead to their lioj breaking.

Наиболее близким к предлагаемому вл етс устройство дл лить изделий из полимерных материалов, содер жащее неподвижный упор литьевой машины и литьевую форму, включающую плиту выталкивателей, подвижную плиту и механизм возврата выталкивателей в исходное положение, выполненный в виде втулки с кольцевой канавкой , шток с радиальными проточками с расположенными в них шариками 2. Однако в этой форме втулка и шток подпружинены. Наличие пружин снижает надежность работы формы и усложн ет ее .конструкцию.The closest to the present invention is a device for casting products from polymeric materials, containing a fixed support for the injection molding machine and a mold that includes an ejector plate, a movable plate and an ejector return mechanism in the form of a sleeve with an annular groove, a rod with radial grooves with balls 2 located in them. However, in this form the sleeve and the rod are spring-loaded. The presence of springs reduces the reliability of the form and complicates its design.

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Цель изобретени - повышение надежности и упрощение конструкции.The purpose of the invention is to increase reliability and simplify the design.

Поставленна цель достигаетс тем,The goal is achieved by

то в устройстве дл лить изделий из полимерных материалов, содержащем неподвижный упор литьевой машины и итьевую форму, включающую плиту выталкивателей , подвижную плиту и механизм возврата выталкивателей в исходное положение, выполненный в виде втулки с кольцевой канавкой, шток с радиальными проточками с расположенными в них шариками, втулка механизма возврата выталкивателей в исходное положение закреплена в подвижной плите, его шток жестко закреплен на плите выталкивателей, а на упоре машины выполнена кольцева проточкаthen in a device for casting products from polymeric materials, containing a fixed support for the injection molding machine and an injection mold, including an ejector plate, a movable plate and an ejector return mechanism in the initial position, made in the form of a sleeve with an annular groove, a rod with radial grooves with balls arranged in them , the bushing of the ejector return mechanism is fixed in the movable plate, its rod is rigidly fixed on the ejector plate, and the ring groove is made on the machine stop

Claims

for calling balls. The drawing schematically shows the mechanism for returning the ejector to the initial position. The device contains a movable plate 1, a plate 2 ejectors with a rod 3, interacting with a fixed stop 4. Radial holes are made at the free end of the rod; balls 5 are installed in it; b is attached to the MOBILE plate 1 with an annular groove 7, an annular groove 8 is made. The mold is operated as follows. after injection of plastic into the working cavity, the movable plate 1 and the plate 2 of the ejectors move away from the fixed part of the mold. When the moving part moves, the rod 3 is pushed onto the fixed support 4 of the injection molding machine. The pusher plate 2 stops / and the movable plate 1 continues to move. The bridges under the action of the sleeve b are moved into the groove 8 of the fixed stop 4. Having ejected the product, at the beginning of the movement the fixed stop .4 through the balls 5 is in the chaining-with the stem 3 of the plate 2 Picks up to the full} return to the initial position At the moment of approaching MOVING the plates i to the plate 2 of the pusher ejector 5 are moved to the ring. Canadia 7 of the sleeve 6. At this time, the rod 3 is released from the fixed stop and the plate 2 continues movement with a movable plate 1, due to the fact that weak links are excluded in the form - spring, gripping jaws and axle, the ejection force is transmitted directly from the fixed stop to the rod, and the balls are set freely and receive movement directly under the action of the fixed stop or sleeve, reliability of work of a form increases. The invention of the Device for casting polymeric materials, comprising a stationary support of an injection molding machine and an injection formula comprising a pusher plate, a movable plate and an ejector return mechanism, made in the form of a sleeve with an annular groove, a rod with Radial channels, with balls arranged in them, characterized in that, in order to increase reliability and. simplifying the design, the bushing of the ejector return mechanism is fixed in the movable plate, its stem is rigidly fixed on the ejector plate, and an annular groove for the starting balls is made on the machine stop. Sources of information taken into account in the examination 1. The author's certificate of the USSR 557923, cl. At 29 C 5/00, 1975. 2, USSR Copyright Certificate No. 372073, cl. In 29 C 1/00, 1970 (prototype).

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