Welding-line-free spraying-free product injection mold and machining method

Abstract

The invention provides a welding-line-free spraying-free product injection mold and a machining method. The welding-line-free spraying-free product injection mold comprises a mold body and an in-moldheat cutting assembly; the mold body comprises a runner plate, a female mold plate, a female mold core, a male mold core, a male mold plate and a male mold bottom plate, a product cavity is formed between the female mold core and the male mold core, and is used for injection molding of the product, the female mold core is provided with a glue inlet communicating with the runner plate, the glue inlet is located over the product hole position, the in-mold heat cutting assembly comprises a cutter and a micro high-pressure oil cylinder, the cutter is located under the product hole position, and the micro high-pressure oil cylinder is used for driving the cutter to extrude a cutting hole to the product hole position. According to the welding-line-free spraying-free product injection mold, the in-mold heat cutting assembly is arranged, the problem about applying of a spraying-free material to a welding line of an injection product with a hole is solved thoroughly from the mold aspect, and the appearance effect of the spraying-free material injection product with the hole can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of injection molding, in particular to an injection mold for spray-free products without welding lines and a processing method. Background technique [0002] Spray-free plastic is a material that can be directly processed and shaped without spraying or electroplating to give the product a metallic appearance. Spray-free materials are convenient, environmentally friendly, and recyclable, and have a cost advantage over spraying or electroplating processes, so they are increasingly favored by major home appliance and automobile manufacturers. [0003] When spray-free plastics are used to form injection molded parts with holes, there will be very serious weld line problems. The strength of the weld line area is low, which can easily lead to cracking of injection molded parts, and there is color difference with the injection molded part body, which seriously affects injection molding. Appearance of parts. At pr...

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Problems solved by technology

[0004] In order to solve the problem of weld lines produced during the injection molding of existing spray-free plastics mentioned in the above-mentioned prior art, the present invention provides a spray-free product injection mold without weld lines and a processing method to eliminate the spray-free plastic with holes. Weld lines produced during injection molding of plastic parts

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