Aluminium powder wax pill for automobile engine thermoregulator

Abstract

The invention relates to an aluminum powder wax-wrapped pill for a thermoregulator of an automobile engine, which is characterized in that the wax-wrapped pill is a mixture of aluminum powder and paraffin wax, and takes the shape of a cylinder provided with a dead hole; and the weight ratio of the paraffin wax to the aluminum powder is 1 to 0.4-1. The aluminum powder wax-wrapped pill not only can sensitively sense the temperature variation of the engine but also is difficult to separate after being subjected to thermal expansion and cold shrinkage for tens of thousands times due to the characteristic of light specific gravity of the wax-wrapped pill, so that the service life of the thermoregulator is prolonged. Simultaneously, because the aluminum powder used is flaky aluminum powder and the solubility and the fluidity of the aluminum powder are superior to those of other metalloid such as copper powder, the aluminum powder is easy to form when being mixed with the paraffin wax, and the weight precision is easy to control; and the aluminum powder wax-wrapped pill has the advantages of low cost, high profit and long service life.

Description

technical field [0001] The invention relates to an expansion material in a thermostat in an automobile engine water cooling system, in particular to an aluminum powder wax pellet for an automobile engine thermostat. Background technique [0002] Currently, the thermal expansion material of the sensor element, which is the core part of the car thermostat, is composed of paraffin wax and copper powder. Known common thermostat is composed of sensor element, valve, return spring, valve seat, and bracket. Ordinary sensor elements are composed of thermal expansion materials, rubber hoses, sealing sheets, bodies, body covers, bodies, push rods and other components (see Figure 1 and Figure 2). When the temperature of the engine rises, the copper powder in the sensor conducts heat to the paraffin and begins to expand thermally. After the expansion material squeezes the rubber hose, the push rod rises. The push rod rises to drive the valve to open, the flow of cooling water also inc...

AI Technical Summary

Problems solved by technology

The process has the problems of low efficiency and high cost

Although the injection molded copper powder wax pellets are injection molded according to the shape of the wax pellets, the accuracy of the forming weight cannot be guaranteed due to the large specificity and poor fluidity of the copper powder. Therefore, there are still two processes of weighing and punching in the thermostat assembly process.

Therefore, the copper powder wax ball is not ideal in terms of the service life of the thermostat and the manufacturing cost.

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