Heating equipment for steam heating mould

Abstract

The invention relates to heating equipment for a steam heating mould. The heating equipment comprises a mould core with a pouring gate, a high-temperature steam branch, and a high-temperature dried air branch; the mould core is provided with an injection valve for leading high-temperature steam or high-temperature dried air into a mould cavity, and an overflow valve for leading high-temperature steam or high-temperature dried air out of the mould cavity; the mould core comprises a front mould and a rear mould; the injection valve is arranged in an air inlet which is formed on the front mould opposite to the pouring gate of the rear mould and comprises a slidable valve core arranged in a chute; and two ends of the valve core are matched at the end of the air inlet and the end of the pouring gate respectively. The surface layer of the mould cavity is heated by high-temperature steam led by the high-temperature steam branch, and steam and moisture in the mould cavity are removed by using the high-temperature dried air, so that the whole mould core is not needed to be heated, and the heating time of the mould and energy consumption are reduced; meanwhile, the mould has a simple structure, and the manufacturing cost of the mould is low. The invention also discloses an injection moulding process for producing by using the equipment.

Description

[0001] This application is a divisional application of "the application date is August 26, 2008, the application number is CN200810141706.4, and the invention name is a heating device for steam heating mold and an injection molding process using the device". 【Technical field】 [0002] The invention relates to mold manufacturing technology, and more specifically relates to a heating device which uses high-temperature steam to heat the surface layer of a mold cavity. 【Background technique】 [0003] In the prior art, traditional injection mold heating devices usually use electric heating elements to heat water or heat-conducting oil and other liquids with good thermal conductivity, and then pass the heated water or heat-conducting oil into the mold heating flow channel to make the mold in the injection stage Able to maintain a preset temperature, such as patents CN293328, CN2621910Y and CN200957650. [0004] Studies have shown that in the injection molding stage, if the mold te...

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a steam-heated mold heating equipment for the defects of high energy consumption, long production cycle or high equipment cost and high mold cost existing in various mold heating devices in the prior art. The equipment can use high-temperature steam to directly heat the surface of the mold cavity

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