Manufacturing process method of plastic water level strip, plastic water level strip and injection mold

Abstract

The invention discloses a manufacturing process method of a plastic water level strip, the plastic water level strip and an injection mold. The production and manufacturing defects of the plastic water level strip are overcome, and the plastic water level strip with high quality is obtained. The method includes the following steps that a PCB of the plastic water level strip serves as a core, and the injection mold of the plastic water level strip is manufactured; the injection mold is mounted in injection molding equipment, and a molten plastic material is extruded into the injection mold through a screw or a plunger; and after the plastic material is cool-formed in the injection mold, during mold unloading, the core and a cool-formed plastic part are taken out together, and the plastic water level strip is obtained. The PCB serves as the injection-molded core of the waterproof plastic part, and the defects that as the specification of the PCB is small, the PCB is difficultly insertedinto a plastic sleeve, the physical properties of the PCB are easily damaged when suffering from high pressure, and therefore the yield of plastic water level strips is low are overcome.

Description

technical field [0001] The invention relates to the technical field of production of smart household daily necessities, in particular to a manufacturing process for a plastic water level strip, a plastic water level strip and an injection mold thereof. Background technique [0002] The applicant has developed a variety of smart drinking vessels including smart water cups, thermos cups, and kettles. The applicant with the application number 201720415322.1 has previously applied for a water level and ultraviolet disinfection device, including device fixtures, ultraviolet lamps, water level detector and a main control circuit board, the water level detector is a conductive film attached to the fixture of the device, a plurality of the ultraviolet lamps are evenly arranged on the fixture of the device along the conductive film, the The device fixing part is detachably installed in the drinking vessel; the ultraviolet lamp and the water level detector are respectively electricall...

AI Technical Summary

Problems solved by technology

[0004] One is that due to the small size of the PCB board, the hole of the corresponding plastic sleeve is also relatively small. It is very difficult to insert the PCB board into the plastic sleeve. Due to the physical characteristics of the PCB board, it is easy to be damaged when it is under a large pressure, resulting in the finished product of the plastic water level bar. low rate

[0005] The second is that the PCB board and the plastic sleeve are assembled together after molding, and the joint position is generally sealed with a sealant, which cannot obtain a good sealing effect, thus affecting the service life of the plastic water level strip

[0006] Third, because the PCB board and the plastic sleeve are assembled together after molding, in order to ensure smooth assembly, a certain gap needs to be reserved between the PCB board and the plastic sleeve, so that the combination between the PCB board and the plastic sleeve is not tight enough, so that the water level There is a large distortion in the detection, and due to the deformation of the plastic sleeve under the influence of water temperature, the water temperature detection value is further affected

[0007] Fourth, due to the small size of the socket for the plastic sleeve and the PCB board, the core used for injection molding of the plastic sleeve is also relatively small. When the injection molding of the plastic sleeve is completed, it is very difficult to pull out the core, resulting in The plastic sleeve is damaged, which affects the assembly and use

Images