Forming method of trackless lampshade and forming mould

A molding method and molding die technology, applied in the field of lighting equipment, can solve the problems of unavoidable welding points, material strength reduction at welding lines, large flow resistance, etc. uniform effect
CN102320103AInactive Publication Date: 2012-01-18XIAMEN HONTAY INDAL
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
XIAMEN HONTAY INDAL
Publication Date
2012-01-18
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a forming method of a trackless lampshade. The method comprises the following steps of: arranging a cavity corresponding to the shape of a cast in a mould; taking the opened edge of the corresponding cast as a parting surface to arrange a charge hole at a certain position of the parting surface; injecting a molten casting material in the cavity of the mould through the charge hole; locally heating the cavity in the injection process, wherein the heating position is a position with highest advance resistance of a forward material; and, when advance resistances are same, the heating position is the longest stroke from the charge hole to the parting surface of the forward material, therefore, the forward materials in all positions are collected on the parting surface; and finally, obtaining the trackless cast. By using the method disclosed by the invention, all the forward materials of the casting material can be finally collected on the parting surface of the mould, therefore, any casting point, fusion welding line or fusion welding point cannot be formed on the cast; and the trackless lampshade can be completely formed. The invention further discloses a forming mould of the trackless lampshade.
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Description

technical field

[0001] The invention relates to the technical field of lighting equipment, in particular to a forming method and a forming mold of a traceless lampshade. Background technique

[0002] At present, there are three kinds of production technologies applied to the lampshades used in LED lighting lamps, one is "one-step molding" (injection mold blow molding); blow molding); the third is injection molding.

[0003] At present, the lampshades produced by the above-mentioned technologies generally have two major defects. First, the injection molded lampshade has a single shape, which cannot meet diverse needs. Second, lampshades similar to spherical shapes and mushroom bulbs must be formed by blow molding. However, the blow-molded lampshades currently used in the market are all injection molded in the middle, that is to say, their "feed point" is located at the vertex of the product's symmetry axis, and the "feed point" generated during molding has become the first...

Claims

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