Spark plug cap production technology

Abstract

The invention discloses a spark plug cap production technology. The production technology comprises the following steps: (1) fixedly connecting a resistor cap (6) and a self-tapping screw (3) together through a connection sheet (7) at a room temperature so as to form a screw assembly; (2) installing the screw assembly to a mould core, then placing the mould core into a mould, and producing a body (1) through an injection moulding technology; (3) loading a spring (5) and a resistor (4) into the main pipe (1a) of the body (1) in sequence at a room temperature, and finally screwing a conductive cap (2) into the main pipe (1a) of the body (1). The technology is simple, the steps are simplified, and the production efficiency is high. The assembly can be achieved at a room temperature, thus the workers will not be burned, and the bad conductivity of products is effectively prevented. Furthermore, the contact area between the spring and the resistor cap is large, thus the contact performance is better, and the conducting performance is further improved.

Description

technical field [0001] The invention relates to an engine component, in particular to a production process of a spark plug cap. Background technique [0002] The spark plug cap is an important part of the engine. It is used to connect the high-voltage line and the spark plug. Its quality directly affects the starting performance of the engine. The existing spark plug cap is composed of a body, a conductive cap, a resistor, a spring, a resistor cap, connecting pieces, screws and other components. During production, the body is processed first, and then the rest of the parts are assembled in the body. The existing shortcomings are: [0003] 1) The screw has a round head structure, which must be assembled at a high temperature in a hot state (about 150°C), and the screw can not rotate in the body after cooling; not only that, the assembly of other parts is also carried out in a hot state, so that on the one hand, the assembly The process is relatively complicated, and the asse...

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Problems solved by technology

[0003] 1) The screw has a round head structure, which must be assembled at a high temperature in a hot state (about 150°C), and the screw can not rotate in the body after cooling; not only that, the assembly of other parts is also carried out in a hot state, so that on the one hand, the assembly The process is more complicated, the assembly operation is inconvenient, and the operator is easy to burn his hand; on the other hand, the residue in the body is not easy to clean up, which may easily cause poor conduction of the product

[0004] 2) The reliability of the screw fixing is poor, the contact surface between the spring and the resistor cap is small, the reliability of the spring positioning is poor, and it is prone to skew, which leads to poor conductivity between the spring and the resistor

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