A mold with a valve core skeleton covered with insulating silica gel and its application method

Abstract

The invention discloses a die for valve core framework coated insulating silicone and a using method thereof, belonging to the technical field of dies. The die for valve core framework coated insulating silicone, from top to bottom, sequentially comprises an injection-compression head, an upper die, a middle die and a lower die, wherein the injection-compression head is fixed on an upper hot plate of a forming machine, and the lower die is fixed on a lower hot plate of the forming machine; the die for valve core framework coated insulating silicone also comprises a sliding die core, the sliding die core is assembled on the lower die and located in a die cavity of the middle die, a valve core framework is located between the sliding die core and the inner wall of the die cavity of the middle die, and a position on the upper surface of the lower die and corresponding to the valve core framework is provided with granular bulges so as to ensure that the lower bottom surface of the valve core framework is not in contact with the upper surface of the lower die; the upper die compresses the sliding die core through a press block protruding downwards on the upper die, so that the sliding die core expands and locks the valve core framework. The die and the method disclosed by the invention can ensure that the thickness of a silicone coated layer on the surface of the valve core framework coated insulating silicone is flat and uniform, and a silicone coated surface has no waste rubber edge.

Description

technical field [0001] The invention belongs to the field of injection molding molds, and more specifically relates to a mold for wrapping an insulating silicon rubber layer on an iron core of a solenoid valve and a use method thereof. Background technique [0002] Injection molding is a rubber molding method when the rubber product contains a metal or plastic skeleton. In conventional compression molding molds, due to the change of the molecular chain of the rubber material during the vulcanization process, the material will flow and expand to generate external force, which will cause the skeleton to move due to uneven force, affecting product quality, resulting in low product qualification rate and low production capacity. [0003] The solenoid valve core is the key component of the electromagnetic induction of the solenoid valve. When the wire wound on the iron core is energized, an electromagnetic force is generated on the iron core. The solenoid valve uses this electrom...

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Problems solved by technology

[0006] Aiming at the problems in the prior art that the thickness of the insulating silicone rubber layer wrapped on the iron core of the solenoid valve is uneven, and rubber waste edges are easily produced on the rubber covering surface, the present invention provides a mold with a valve core frame covered with insulating silicone rubber and its use method , the mold and method can ensure that the thickness of the covering layer on the surface of the valve core skeleton covered with insulating silica gel is even and uniform, and there is no rubber waste edge on the covering surface

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