Integral high-gloss non-marking injection mold core and its heat treatment process

Abstract

The invention belongs to the field of injection molding dies, and in particular relates to an integrated high-finish traceless injection molding die core. The integrated high-finish traceless injection molding die core is characterized in that: the upper surface of the die core is provided with a square sunken groove, two pentagonal following water passages are arranged in the die core and positioned at the bottom of the sunken structure, and protruding structural blocks on two sides of the die core and a die core body form a T-shaped structure. A thermal treatment process of the die core comprises the following steps of: pre-heating treatment, pre-sintering and homogenizing treatment, stress removal, oxide reduction, sintering treatment, tempering treatment and cooling treatment. Compared with the prior art, formation of the integrated traceless injection molding die core can be realized, the sealing problem is avoided, medium leakage caused by improper sealing is avoided, and the following water passages of the integrated die core are closer to the surface of a die cavity so that hot and cold media can exchange heat with the surface of the die cavity more fully and quickly.

Description

technical field [0001] The invention belongs to the field of injection moulds, in particular to an integral high-gloss traceless injection mould core and a heat treatment process thereof. Background technique [0002] In order to realize non-marking injection molding, the common method abroad is to divide the non-marking injection mold core into two parts, the surface shell and the back plate, and process the conformal groove with the shape of the cavity surface between the two parts, and the surface is divided into two parts. The two parts of the shell and the back plate are combined to form a conformal medium channel, but the mold core divided into two parts is complicated to manufacture, and there is a sealing problem: in addition, due to the cutting force of the props during machining, the conformal groove cannot be in contact with the cavity surface. If the distance is too close, otherwise the surface of the cavity will be deformed under the action of the cutting force,...

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Problems solved by technology

[0002] In order to realize traceless injection molding, the commonly used method abroad is to divide the core of the traceless injection mold into two parts, the surface shell and the back plate, and process a conformal groove consistent with the surface shape of the cavity between the two parts. The two parts of the shell and the back plate cooperate to form a conformal medium channel, but the manufacturing of the mold core divided into two parts is complicated, and there are sealing problems: In addition, due to the cutting force of the tool during machining, the conformal groove cannot be in contact with the surface of the cavity. The distance is too close, otherwise the surface of the cavity will be deformed under the action of cutting force, which will seriously affect the molding quality of plastic parts

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