Internal structure of material injection nozzle of mould in APG process

A technology of injection nozzle and inner structure, which is applied in the field of gate area, can solve the problems of easy generation of sink marks, scrapped insulation products, and difficult to carry out, and achieves the effect of delaying the curing of parts, improving the qualification rate and reducing product deformation.

Inactive Publication Date: 2009-11-11
SHANGHAI ROX ELECTRIC
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  • Abstract
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Problems solved by technology

[0003] Insulation parts of medium and high voltage electrical equipment are generally made of thermosetting epoxy resin materials. This material is prone to sink marks during the reaction stage in the mold, and product defects such as internal and external pores cause direct scrapping of insulation products. The main reason is epoxy resin. Before the material enters the mold cavity, the thinner gate absorbs too much heat, causing the gate to solidify in advance and making subsequent feeding difficult

Method used

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  • Internal structure of material injection nozzle of mould in APG process

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Embodiment Construction

[0009] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0010] Depend on figure 1 It can be seen that the present invention includes: a body 1; a gate 2 on the body 1; a nozzle 3; a layer of polytetrafluoroethylene material is coated on the inner wall of the nozzle 3.

[0011] In the invention, a polytetrafluoroethylene bush is added in the flow channel of the mold to block the direct contact between the epoxy resin and the mold before entering the mold cavity, so as to avoid premature solidification at the gate.

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Abstract

The invention relates to an internal structure of a material injection nozzle of a mould in an APG process. The internal structure comprises a body (1) which comprises a pouring gate (2), and a material injection nozzle (3), wherein the inner wall of the material injection nozzle (3) is coated by a layer of polyfluortetraethylene material. The internal structure ensures the relatively low temperature of the material injection nozzle all the time, can maximally delay the solidification at the material injection nozzle so as to be beneficial to subsequent feeding of a formed product, maximally reduces formation defects such as product deformation, watermarks, air holes, and the like, and can well improve the qualification rate of components.

Description

technical field [0001] The invention relates to the gate part of the mold in the APG process. Background technique [0002] The APG process refers to a process in which the Automatic Pressure Generator (Automatic Pressure Generator) is injection-molded through a thermosetting mold using epoxy resin materials. [0003] Insulation parts of medium and high voltage electrical equipment are generally made of thermosetting epoxy resin materials. This material is prone to sink marks during the reaction stage in the mold, and product defects such as internal and external pores cause direct scrapping of insulation products. The main reason is epoxy resin. Before the material enters the mold cavity, the thinner gate absorbs too much heat, causing the gate part to solidify in advance and making subsequent feeding difficult. Contents of the invention [0004] The technical problem to be solved in the present invention is to provide an inner structure of the injection nozzle of the mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/27B29K63/00
Inventor 吴广军
Owner SHANGHAI ROX ELECTRIC
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