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CN-224224427-U - Sprue bush

CN224224427UCN 224224427 UCN224224427 UCN 224224427UCN-224224427-U

Abstract

The utility model discloses a sprue bush, wherein two ends of a cooling runner are respectively provided with only one inlet section and only one outlet section, so that the flow of cooling fluid is monitored in real time only through a single inlet section and a single outlet section, more accurate control can be realized on the accuracy of cooling temperature equalization, and the cooling runner is used for cooling the main runner, so that the cooling efficiency is improved, the cooling time is shortened, the integral forming period is shortened, the forming yield of an optical element is improved, the size of the sprue bush is fine and tiny, and the structural strength and the processing feasibility of the sprue bush are ensured.

Inventors

  • ZHENG ZHENWEN
  • DENG YIMAN
  • Zeng Pingbao

Assignees

  • 茂晶光电(厦门)有限公司

Dates

Publication Date
20260512
Application Date
20250604

Claims (13)

  1. 1. The sprue bush is characterized by comprising a main runner extending along a long axis direction and a cooling runner wound on the main runner; The cooling flow channel comprises only one inlet section for introducing a cooling fluid, only one outlet section for extracting the cooling fluid, and a flow channel unit connected between the inlet section and the outlet section; The flow channel unit comprises an inner flow channel for guiding the cooling fluid from the inlet section, an outer flow channel for guiding the cooling fluid to the outlet section, and a connecting part connected between the inner flow channel and the outer flow channel, wherein the inner flow channel is positioned between the outer flow channel and the main flow channel; The inner runner forms a cylindrical structure and surrounds the inner runner along the long axis direction of the main runner, and comprises a first inner wall close to the main runner, a first outer wall far away from the main runner and a first top surface connected between the first inner wall and the first outer wall; The outer flow channel forms a cylindrical structure and surrounds along the long axis direction of the inner flow channel, and comprises a second inner wall close to the inner flow channel, a second outer wall far away from the inner flow channel and a second top surface connected between the second inner wall and the second outer wall.
  2. 2. The sprue bush according to claim 1, wherein 0.2≤ DImin/DOmax≤1.0 is satisfied, DImin is a minimum distance of the first inner wall corresponding to a maximum caliber of the main runner, and DOmax is a maximum distance of the second outer wall in a transverse cross-sectional direction.
  3. 3. The sprue bush of claim 1, wherein a minimum transverse cross section is formed between the first outer wall and the second inner wall, and a distance between the first outer wall and the second inner wall in a direction of the minimum transverse cross section is 1.2-3.0 mm.
  4. 4. The sprue bush of claim 1, wherein the ratio of BRmax to BRmax is 2.0≤ DOmax/13.0, DOmax being the maximum distance of the second outer wall in the transverse cross-section direction, BRmax being the maximum diameter of the main runner.
  5. 5. The sprue bush is characterized by comprising a main runner extending along a long axis direction and a cooling runner wound on the main runner; The cooling flow channel comprises only one inlet section for introducing a cooling fluid, only one outlet section for extracting the cooling fluid, and a flow channel unit connected between the inlet section and the outlet section; The flow channel unit comprises an inner flow channel for guiding the cooling fluid from the inlet section, an outer flow channel for guiding the cooling fluid to the outlet section, and a connecting part connected between the inner flow channel and the outer flow channel; The inner runner forms a cylindrical structure and surrounds the inner runner along the long axis direction of the main runner, and comprises a first inner wall close to the main runner, a first outer wall far away from the main runner and a first top surface connected between the first inner wall and the first outer wall; And satisfies 0.4-DImin/BRmax-6.0, wherein DImin is the minimum distance of the first inner wall corresponding to the position closest to the maximum caliber of the main flow channel, and BRmax is the maximum caliber of the main flow channel.
  6. 6. The sprue bush according to claim 5, wherein 0.2≤ DImin/DOmaxB≤0.4 is more satisfied, and wherein DOmaxB is the maximum distance of the outer runner in the transverse cross-sectional direction.
  7. 7. The sprue bush according to claim 1 or 5, wherein a minimum transverse cross section is provided between the main runner and the first inner wall, and a distance between the main runner and the first inner wall in a direction of the minimum transverse cross section is 1.2-3.0 mm.
  8. 8. The sprue bush according to claim 1 or 5, wherein a minimum transverse cross section is provided between the first outer wall and the outer flow path, and a distance between the first outer wall and the outer flow path in a direction of the minimum transverse cross section is 1.2-3.0 mm.
  9. 9. The sprue bush of claim 1 or 5, wherein one end of the main flow channel in the long axis direction is provided with a sprue gate, and the inlet section, the outlet section and the sprue gate are all positioned on the same side of the sprue bush.
  10. 10. The sprue bush according to claim 1 or 5, wherein 1.0≤wi/Wo≤1.5 is more satisfied, where Wi is a minimum width of a lateral cross section through which the cooling fluid can flow in the inner runner, and Wo is a minimum width of a lateral cross section through which the cooling fluid can flow in the outer runner.
  11. 11. The sprue bush of claim 1 or 5, wherein one end of the main runner in the long axis direction is provided with a sprue gate, and the sprue bush further satisfies 0.2 LR/LI less than or equal to 10.0, wherein LR is a maximum length of the main runner in the long axis direction starting from the sprue gate, and LI is a maximum length of the first inner wall in the long axis direction.
  12. 12. The sprue bush according to claim 1 or 5, wherein the number of the connecting portions is at least 2.
  13. 13. The sprue bush according to claim 1 or 5, wherein the connecting portion includes an inlet provided on the first outer wall for communicating with the inner flow path, an outlet for communicating with the outer flow path, and a coupling section connected between the inlet and the outlet.

Description

Sprue bush Technical Field The utility model relates to the technical field of injection molds, in particular to a sprue bush which can be particularly applied to an optical element forming mold. Background In the injection molding field, since the sprue bush is smaller in size and the cooling runner is not arranged for the main runner, the cooling time of the mold cannot be shortened, the overall molding period is longer, and the distribution difference of the material temperature in the main runner is also larger, so that the molding yield is affected. In addition, the sprue bush is provided with the cooling water channel capable of cooling the main runner, and the matching property of the main runner and the cooling runner is considered, so that the sprue bush can be maintained not to be oversized, and the sprue bush has enough structural strength and manufacturability. Therefore, how to cool the main runner and achieve uniform temperature in the long axis direction and the transverse cross section direction of the main runner to improve the molding yield and maintain the size of the sprue bush fine and tiny, the structural strength and the processing feasibility are the problems to be solved. Disclosure of utility model Therefore, the present utility model is to solve the above problems, and provide a sprue bush capable of realizing uniform temperature by cooling a main runner, maintaining the dimensions of the sprue bush fine and minute, and ensuring its structural strength and processing feasibility. In order to achieve the above purpose, the technical scheme provided by the utility model is as follows: The utility model provides a sprue bush, which comprises a main runner extending along a long axis direction and a cooling runner wound on the main runner, wherein the cooling runner comprises only one inlet section for introducing cooling fluid, only one outlet section for extracting the cooling fluid and a runner unit connected between the inlet section and the outlet section, the runner unit comprises an inner runner for introducing the cooling fluid from the inlet section, an outer runner for guiding the cooling fluid to the outlet section and a connecting part connected between the inner runner and the outer runner, the inner runner is positioned between the outer runner and the main runner, the inner runner forms a cylindrical structure and surrounds along the long axis direction of the main runner, and comprises a first inner wall close to the main runner, a first outer wall far away from the main runner and a first top surface connected between the first inner wall and the first outer wall, and the outer runner forms a cylindrical structure and surrounds along the long axis direction of the inner runner and comprises a second inner wall close to the inner runner, a second outer wall far away from the inner runner and a second top surface connected between the second inner wall and the second outer wall. The utility model also provides a sprue bush, which comprises a main runner extending along the long axis direction and a cooling runner wound on the main runner, wherein the cooling runner comprises only one inlet section for introducing cooling fluid, only one outlet section for leading out the cooling fluid and a runner unit connected between the inlet section and the outlet section, the runner unit comprises an inner runner for leading in the cooling fluid from the inlet section, an outer runner for leading out the cooling fluid to the outlet section and a connecting part connected between the inner runner and the outer runner, the inner runner forms a cylindrical structure and surrounds the main runner along the long axis direction, and comprises a first inner wall close to the main runner, a first outer wall far away from the main runner and a first top surface connected between the first inner wall and the first outer wall, and the requirement of 0.4-DImin/BRmax-6.0 is met. In an embodiment of the utility model, a minimum transverse cross section is between the first outer wall and the second inner wall, and a distance between the first outer wall and the second inner wall in a direction of the minimum transverse cross section is 1.2-3.0 mm. In an embodiment of the utility model, a distance between the main flow channel and the first inner wall in a minimum transverse cross-section direction is 1.2-3.0 mm. In an embodiment of the utility model, a minimum transverse cross section is between the first outer wall and the outer flow channel, and a distance between the first outer wall and the outer flow channel in a direction of the minimum transverse cross section is 1.2-3.0 mm. In an embodiment of the utility model, one end of the main runner along the long axis direction is provided with a material injection port, and the inlet section, the outlet section and the material injection port are all located on the same side of the sprue bush. In an embodiment of the utility model, the number of