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 · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2012-01-18
Estimated Expiration
Not applicable · 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...

Examples

Embodiment Construction

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] The invention discloses a method for forming a seamless lampshade. The steps of the method are: setting a cavity in the mold in the shape of the opposite injection part, using the edge of the opening of the opposite injection part as the parting surface, and A feed inlet is set at a certain position, and the melted material is injected into the cavity of the mold from the feed inlet. During the injection process, the cavity is locally heated. The heating position is at the point where the forward resistance of the material is the largest. When the forward resistance is the same, then At the point where the front material travels the longest from the feed port to the parting surface, the front material in all positions is gathered at the parting surface, and finally forms a seamless injection part. The molding process of injecti...