A manufacturing process of full-angle led plastic bulb lampshade

Abstract

The invention discloses a manufacturing process of a full-angle LED plastic bulb lampshade, including S1. placing a positioning rod in a tubular embryo body, placing the tubular embryo body in a bulb blow mold, and the positioning rod includes a movable section and a fixed section , the fixed section is provided with a through hole for air intake; S2. Bake and soften the tubular embryo body to make it reach the Vicat softening point, and the tubular embryo body is baked to reach an expandable state; S3. From one end of the through hole of the fixed section Blow in compressed air, lift the movable section to open the other end of the through hole, inflate and soften the tubular embryo body, and at the same time, the spherical surface of the movable section is jacked up to make tangential contact with the inner wall of the tubular embryo, and then blow molded into a bulb lampshade. The invention makes the lampshade of the bulb uniform in thickness and does not produce spots, and can blow mold the lampshade of the large diameter and small opening type with a large inflation ratio, so that the LED lamp can emit light all around, and the light pattern and light effect meet the best requirements.

Description

technical field [0001] The invention relates to a manufacturing process of an LED plastic bulb lampshade, in particular to a manufacturing process of an all-angle LED plastic bulb lampshade. Background technique [0002] In the prior art, the production process of the LED plastic bulb lampshade with a large illumination angle is generally as follows: first, the embryo body is injection-molded, then the embryo body is baked and softened, the softened embryo body is placed in the mold, and compressed air is blown into it to blow it. Inflated and pasted on the wall of the mold cavity, it is formed by cooling and hardening. The limitation is that the LED plastic bulb lampshade made by the above process is uneven in thickness, and even the lamp beads can be seen, which makes the LED lamp emit unevenly; The other end of the bulb lampshade away from the installation end is skewed, which leads to the offset of the glue inlet point, which greatly affects the aesthetics of the LED lam...

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Problems solved by technology

[0004] However, the disadvantage of setting the stretching rod in the blow molding mold is that: since the stretching rod is directly in contact with the embryo body, the heat at the end of the tubular embryo body in contact with it is conducted away, and the local cold stretching is carried out. , and the part that does not conduct heat is excessively blown, resulting in uneven wall thickness of the LED plastic lampshade, so that the LED plastic bulb lampshade after blow molding forms a large spot at the contact point, and the spot makes the LED light shine. At the same time, due to the above defects, generally only large-diameter bulbs can be blown, that is, the lampshade with a small inflation ratio, so that the molded LED plastic bulb lampshade has a larger diameter, which in turn affects LED lighting. Lighting angle

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