Manufacturing method of temperature sensor

Abstract

The present invention provides a method for making the temperature sensor, the electric wire is connected to the thermal resistance, the thermal resistance and the connecting part between the thermalresistance and the electric wire are inserted into the casing tube of the resin adhesive that has been injected, and are solidified by heating, the method comprises the following characters: the resinadhesive to be injected into the casing tube is done with vacuum defoamation, then the defoamed resin adhesive is injected into the casing tube with definite quantity, afterwards, the connecting partbetween the thermal resistance and the electric wire is inserted into the casing tube which is injected with resin adhesive with definite quantity, and the temperature sensor is heat-solidified withthe heating-solidifying device in the process of conveying in a same direction. The purpose of mass-producing temperature sensors with high efficiency can be realized while the quality is not reduced.

Description

technical field [0001] The present invention relates to a manufacturing method of a temperature sensor, more specifically, a manufacturing method of inserting a thermistor and a wire connection part into a casing filled with resin glue to form a temperature sensor. Background technique [0002] Usually, in various electrical and electronic products, the temperature sensor used for sensing temperature is composed of a thermistor and two wires connected to both sides of the thermistor. [0003] In order to prevent the thermistor and the connection between the thermistor and the wire from being intruded by moisture and foreign substances, the resin glue is potted. In order to make it easier to fill the resin glue, a cylindrical sleeve with an opening at one end After injecting resin glue inside, insert the thermistor and the connecting part of the thermistor and the wire into the casing, heat and harden the resin, and make a temperature sensor. [0004] The manufacturing metho...

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Problems solved by technology

[0006] However, although the existing manufacturing method of this temperature sensor has the effect of improving the quality to a certain extent, there are still many restrictive factors for mass-produced temperature sensors.

[0007] That is, as mentioned above, in order to inject an appropriate amount of resin glue in the casing, it is necessary to inject a small amount of resin glue into the casing, and then repeatedly replenish or reduce the resin to reach an appropriate level. This resin injection operation method has the advantages of operation More complex, and the problem of slow operation time

[0008] Especially in the existing temperature sensor manufacturing method, under the condition that the thermistor and the connecting part of the thermistor and the electric wire are inserted into the resin glue in the bushing, put them into a drying box and heat them, so that the resin in the bushing Glue hardening; in this heat hardening process, due to the limited capacity of the drying box, a certain number of products are put into the drying box and heated and hardened, then they are taken out of the oven, and then put into a batch of products for further processing. Heat hardening, this repeated operation process of putting the product into the oven to heat harden and then taking it out is inevitable; so the problem is that in order to be suitable for mass production, a production process that can be continuously heat hardened is required

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