Improved structure of plunger type ejection mechanism

Abstract

The invention provides an improved structure of a plunger type ejection mechanism. The improved structure comprises a body part, a sliding part and a blocking part, wherein the body part is provided with a body, a first sliding hole linearly extends inwards from one end of the body; a discharge channel extends inwards from the other end of the body; a first opening is formed in the position, located at the extension tail end, of the hole wall of the first sliding hole and communicates with the discharge channel and the first sliding hole; a feed channel is arranged on the body, and a second opening spaced from the first opening is formed in the position, located at the extension tail end, of the hole wall of the first sliding hole; the sliding part is provided with a plunger, the plunger is coaxially arranged in the first sliding hole in a sliding mode, one end of the plunger faces the hole wall, located at the extension tail end, of the first sliding hole, and the peripheral cylindrical surface of the plunger is attached to the hole wall of the first sliding hole, the plunger can do linear reciprocating displacement relative to the body part along the cylindrical axis of the plunger and can move between a metering position and a zero return position; the blocking part is provided with a second sliding hole which is formed in the plunger in a penetration mode; and a blocking element is slidably arranged in the second sliding hole and does reciprocating displacement between a blocking and closing position and an opening position.

Description

technical field [0001] The invention relates to injection molding technology, in particular to an improved structure of a plunger type injection mechanism. Background technique [0002] As disclosed in the previous technology of injection molding provided by Chinese Patent No. I637987, the solid polymer raw material mixture is melted by heat energy into a flowable state, and after metering, the metered raw material is injected into the mold by a plunger for further processing. Molding is a common technology in the technical field of injection molding, but due to the above-mentioned technical content of injection with a plunger, it is necessary to provide a gap between the plunger injection mechanism and the mold through an elbow adjacent to the mold. The connecting channel of the connected elbow accumulates unused raw materials in the channel inside the connected elbow, and the accumulated raw materials are easy to change due to temperature, which increases the workload of t...

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Problems solved by technology

[0002] As disclosed in the previous technology of injection molding provided by Chinese Patent No. I637987, the solid polymer raw material mixture is melted by heat energy into a flowable state, and after metering, the metered raw material is injected into the mold by a plunger for further processing. Molding is a common technology in the technical field of injection molding, but due to the above-mentioned technical content of injection with a plunger, it is necessary to provide a gap between the plunger injection mechanism and the mold through an elbow adjacent to the mold. The connecting channel of the connected elbow accumulates unused raw materials in the channel inside the connected elbow, and the accumulated raw materials are easy to change due to temperature, which increases the workload of the staff to remove the changed raw materials. Relatively also affects the quality and efficiency of processing

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