Manufacturing process and device for LED plastic pulled-tail bubble shells

Abstract

The invention discloses a manufacturing process for LED plastic pulled-tail bubble shells. The manufacturing process includes the following steps that firstly, plastic is subjected to injection molding to form tube blanks which are cooled and shaped, and a central symmetry area is formed on each tube blank; secondly, a tip portion consistent with a blow-molded finished product in shape is formed on the part above the central symmetry area of each tube blank; thirdly, the tube blanks are baked and softened, the tip portions above the central symmetry areas are not baked, while the portions below the central symmetry areas are baked; fourthly, when the blanks are transferred and mold closing is conducted, the central symmetry areas are kept in mold cavity avoidance from a bottom mold body and a cover mold body of a blowing mold, and avoidance cavities are formed in the portions, above and below the central symmetry areas of the tube blanks, of the blowing mold; and fifthly, the baked and softened portions below the central symmetry areas are subjected to blow-molding, and the LED plastic pulled-tail bubble shells are formed. The invention further discloses a manufacturing device for the LED plastic pulled-tail bubble shells. By means of the manufacturing process and device for the LED plastic pulled-tail bubble shells, the illumination angle of the blow-molded LED plastic pulled-tail bubble shells is large, and the LED plastic pulled-tail bubble shells are free of deformation and attractive in appearance.

Description

technical field [0001] The invention relates to a manufacturing process and equipment for an LED lampshade, in particular to a manufacturing process and equipment for an LED plastic tail bulb. Background technique [0002] In the prior art, the LED pull-tail blister is usually in the shape of an "S", which imitates the shape of a flame. The upper end to the lower end are respectively composed of a pointed part, a conical part and a round part. on the cup. The shape of the LED pull-tail bulb resembles the flame of a candle, which is highly decorative and is favored by everyone. [0003] However, the flame-shaped rear lampshade is difficult to realize in the plastic blow molding process, and the "similar" products made by injection molding, because of the limitation that the injection parts need to be demolded, make the shape of the rear lampshade very rigid and impossible to realize' Flame-shaped' beauty. Therefore, people use the technology of glass blowing to realize the...

AI Technical Summary

Problems solved by technology

However, the disadvantages of the prior art glass tail bulbs are that the glass tail bulbs are fragile and extremely inconvenient to transport, and consumers often receive the goods as a broken waste product

[0004] Therefore, the industry tried to use plastic injection molding to form LED tail blisters. However, due to the limitations of mold release and core pulling, plastic injection molded LED tail blisters must have larger openings, while the conical and round parts are smaller, making The LED illumination angle is small, the illumination angle is usually 145° to 180°, and the lighting effect is poor

At the same time, because of the need for demoulding, it also largely limits the realization of its appearance and shape.

greatly affected its beauty

[0005] The industry is also trying to use the blow molding method to form plastic LED tail blisters. The production process is as follows: first, the plastic injection molding tube embryo is moved to the blow molding mold when the tube embryo is not cooled, that is, the tube embryo is still in a softened state. In the process of stretching and blow molding the plastic LED tail blister, the defect is that the plastic injection molded tube embryo of the tail lampshade is an asymmetric body, also known as an abnormal body, which is easy to encounter during the movement of the tube embryo. Three limitations: First, because the wall thickness of the special-shaped tube embryo cannot be uniform

[0006] The industry is also trying to use two-step blow molding plastic LED tail blisters. The production process is: first inject the plastic into the tube blank and cool it to shape, then bake the tube blank as a whole to soften it, and then transfer the tube blank to the blow mold In the process of drawing and blow molding the plastic LED tail blister, the defect is that when the tube embryo is baked and softened, the tip of the tube embryo is softened and deformed, and at the same time, it is easy to touch the mold shape during the movement of the tube embryo The wall of the cavity makes the tube embryo cool down rapidly so that it cannot be blown up or is seriously out of shape after blowing up

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