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CN-122008485-A - Easy demoulding's of variable cross-section long tube mould

CN122008485ACN 122008485 ACN122008485 ACN 122008485ACN-122008485-A

Abstract

The utility model provides a mould of easy drawing of patterns of variable cross-section long tube, includes the first mould body, the second mould body, first mold core, second mold core, first mold core is installed to the first mould body, the second mold core is installed to the second mould body, the second mould body is being close to the face of the first mould body is provided with the locating plate. The second die body is provided with a positioning groove on the surface close to the first die body, and the positioning groove can accommodate the positioning plate. The locating plate is provided with a mould core hole, and the second mould core penetrates through the mould core hole. The locating plate is fixed on the second die body through bolts. The second mold core is provided with a second positioning table, the diameter of the second positioning table is larger than that of the mold core hole, the left side of the second positioning table is positioned by the positioning plate, and the right side of the second positioning table is positioned by the second mold body.

Inventors

  • XU SHIHUI

Assignees

  • 安徽天舰文具科技有限公司

Dates

Publication Date
20260512
Application Date
20260226

Claims (10)

  1. 1. The die for the variable cross-section long tube easy demoulding is characterized by comprising a first die body, a second die body, a first die core and a second die core, wherein the first die core is arranged on the first die body, the second die core is arranged on the second die body, a locating plate is arranged on the surface, close to the first die body, of the second die body, a locating groove is arranged on the surface, close to the first die body, of the second die body, and the locating groove can accommodate the locating plate.
  2. 2. A die for easily demoulding a variable-section long tube is characterized in that a die core hole is formed in a locating plate, and a second die core penetrates through the die core hole.
  3. 3. A die for easily demoulding a variable-section long tube is characterized in that a locating plate is fixed on a second die body through bolts.
  4. 4. A die with a variable cross-section long tube and easy to demould is characterized in that a second positioning table is arranged on a second die core, the diameter of the second positioning table is larger than that of a die core hole, the left side of the second positioning table is positioned by the positioning plate, and the right side of the second positioning table is positioned by the second die body.
  5. 5. A die for easily demoulding a variable-section long tube is characterized in that the first die core and the second die core are in a tight joint state after the first die body and the second die body are tightly pressed.
  6. 6. A die with a variable cross section long tube and easy to demould is characterized in that a first positioning table is arranged on the left side of a first die core, the first die core is inserted into a first die body from the surface of the first die body far away from the joint surface of the first die body and a second die body, the left side of the first positioning table is positioned by a runner plate, and the right side of the first positioning table is positioned by the first die body.
  7. 7. A die for easily demoulding a variable-section long tube is characterized in that a spring is arranged between a first die body and a second die body, and the first die body and the second die body are guaranteed to be in a separated state when the spring is in a free state.
  8. 8. A die for easily demoulding a variable-section long tube is characterized in that a spring groove is formed in a joint surface of a first die body and a second die body.
  9. 9. A die for easily demoulding a variable cross-section long tube is characterized in that a first die core hole is formed in a first die body, a first positioning notch is formed in a first positioning table, a first die core hole notch is formed in the first die core hole, and the first positioning notch is matched with the first die core notch to enable the first die core to be kept at a unique position.
  10. 10. A die for easily demoulding a variable cross-section long tube is characterized in that a second die core hole is formed in a second die body, a second positioning notch is formed in a second positioning table, a second die core hole notch is formed in the second die core hole, and the second positioning notch is matched with the second die core notch to enable the second die core to be kept at a unique position.

Description

Easy demoulding's of variable cross-section long tube mould Technical Field The invention relates to a die easy to demould, in particular to a die easy to demould of a variable-section long tube. Background In the pen manufacturing field, pen tubes are produced by an injection molding process, which requires the use of an injection mold. The mould comprises movable mould and quiet mould, and movable mould and quiet mould are by main part and mold core two major parts constitution, and the mold core can divide into interior mould core and external mold core, and interior mould core forms the inner chamber of pen tube, and external mold core forms the outer wall of pen tube. The mold core is precisely fitted to the body, typically using a clearance fit, but with a small clearance value, or a transition fit. For a single section pen barrel, it can be easily machined. In practice, however, many pen tubes are formed by a longer section of a uniform section pen tube (with a refill or ink placed inside, held by the outside) and a section of a variable section pen tube connected to the uniform section pen tube and having a gradually decreasing section, with a larger end and a smaller end. The cross section of the pen tube with the variable cross section can be round, rectangular, elliptic, triangular and the like. Because of the limitation of the processing technology, the mold core for manufacturing the variable cross-section pen tube at present consists of two parts, one part is a longer mold core with uniform cross section, the other part is a shorter mold core with variable cross section, the two parts of mold cores are respectively arranged on the main body part of the mold after processing, the two main bodies are combined together and fixed by screws, and the two parts of mold bodies are taken as a whole during operation. That is, only when processing, the body is two parts and the mould core is two parts, but when working, they are an integral body. The mounting direction is from the joint surface when the mould core is mounted to the body part, so that the mould core is held stationary by the joint surface when the body parts are brought together. In normal injection molding, ten or even tens of pen tubes are injected at the same time. The normal demoulding process is that the movable mould drives the inner mould core to move, the inner mould core drives the pen tube to move and leave the static mould, and the pen tube breaks away from the inner mould core to enter the material channel. In the process, the movement of the pen tube is mainly driven by the friction force between the inner mold core and the inner wall of the pen tube. This has the first problem that there is also friction between the outer wall of the barrel and the outer core and the inner core is of the same material as the outer core and has substantially the same contact area, so that sometimes the inner core cannot move the barrel and the barrel stays in the mold. The result is that the next injection process continues to inject material, and the amount of material injected in each injection process is the same, since one or more of the pen tubes stay in the mold, the excess material is distributed in the other pen tubes, and the mold clamping force is increased to compress the greater amount of material, which may damage the machine and reduce the quality of the product. In order to solve the problem, one of the methods is to provide a groove on the inner mold core, so that a rib matching with the groove is formed on the pen tube, and the pen tube is moved by matching the groove and the rib. However, at least two problems are brought about, namely, the arrangement of the grooves brings about additional processing cost, and the upper ribs of the pen tube can cause stress on the pen tube, and the glossiness is uneven, so that the attractiveness of the pen tube is affected. Disclosure of Invention In order to solve the technical problem that the demolding cannot be performed smoothly in the background technology, the invention provides a mold for easily demolding a variable-section long tube. The utility model provides a mould of easy drawing of patterns of variable cross-section long tube, includes the first mould body, the second mould body, first mold core, second mold core, first mold core is installed to the first mould body, the second mold core is installed to the second mould body, the second mould body is being close to the face of the first mould body is provided with the locating plate. The second die body is provided with a positioning groove on the surface close to the first die body, and the positioning groove can accommodate the positioning plate. The locating plate is provided with a mould core hole, and the second mould core penetrates through the mould core hole. The locating plate is fixed on the second die body through bolts. The second mold core is provided with a second positioning table, the diameter of the second po