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CN-121989415-A - Polymer-based wear-resistant lubricating material injection shearing test piece manufacturing die

CN121989415ACN 121989415 ACN121989415 ACN 121989415ACN-121989415-A

Abstract

The invention relates to a manufacturing die for an injection-shearing test piece of a polymer-based wear-resistant lubricating material, which comprises an upper die, a middle die and a lower die. Assembling the middle die into a lower die test piece groove in a left mode according to a test piece round hole, assembling the upper die in an injection molding opening alignment mode, inserting a test piece round hole locating pin, performing injection molding in a right-to-left direction, opening the upper die after injection molding, and integrally taking out the middle die and an injection molding spline from a workpiece taking groove position by using a tool, wherein the whole is used for shear strength testing. According to the invention, the injection molding shear strength data can be simply and effectively obtained, and the die can flexibly develop a shear performance test and an optimization test according to design requirements, so that the related research and development cost is remarkably reduced.

Inventors

  • JI HAIPENG
  • ZHAI HONGBIN
  • DU YIMAN
  • JIAO JIEBIAO
  • Meng Zeyang

Assignees

  • 内蒙合成化工研究所

Dates

Publication Date
20260508
Application Date
20260227

Claims (10)

  1. 1. A mold for manufacturing an injection-molded shearing test piece of a polymer-based wear-resistant lubricating material, the device comprising: The upper die (1) comprises a test piece round hole locating pin (101), a test piece round hole locating hole (102), an upper die fixing screw hole I (103), an upper die fixing screw hole II (104), an upper die locating hole I (105), an upper die locating hole II (106) and an upper injection molding opening (107); a middle die (2) which comprises a key slot (201) and a test piece round hole (202); The lower die (3) comprises a test piece groove (301), a piece taking groove (302), a first lower die fixing screw hole (303), a second lower die fixing screw hole (304), a first lower die positioning pin hole (305), a second lower die positioning pin hole (306) and a lower injection molding opening (307); the middle die (2) is embedded into the lower die test piece groove (301), and the upper die (1) and the lower die (3) are clamped and fixed through the fixing bolts and the locating pins.
  2. 2. The polymer-based wear-resistant lubricating material injection-molded shear test piece manufacturing mold according to claim 1, wherein the depth of the round hole (202) of the test piece of the middle mold (2) is kept the same as the depth of the test piece groove (301) of the lower mold (3), and the length and the width of the middle mold (2) are kept the same as the test piece groove (301) of the mold (3), so that the middle mold (2) can be embedded into the test piece groove (301) of the lower mold (3).
  3. 3. The injection molded shear test piece fabrication mold of polymer-based wear resistant lubricant material of claim 1, wherein said mold key slot (201) shape comprises, but is not limited to, one or any combination of several of a straight key slot, a dovetail key slot, a corrugated key slot, an array or other shaped key slots.
  4. 4. The injection-molded shear test piece manufacturing mold of the polymer-based wear-resistant lubricating material according to claim 3, wherein the grooving position of the key groove of the middle mold is a through key groove area or any position of the key groove area, the grooving direction comprises but is not limited to any direction parallel to the surface of the middle mold (2), the grooving area comprises but is not limited to other dimensions of 2cm multiplied by 2cm, and the grooving depth comprises but is not limited to other values except 1-3 mm.
  5. 5. The injection-shearing test piece manufacturing die for the polymer-based wear-resistant lubricating material is characterized in that the length of the test piece round hole locating pin (101) of the upper die (1) is equal to the sum of the thickness of the upper die (1) and the depth of the test piece groove (301) of the lower die (3), and the pin head position of the test piece round hole locating pin (101) is located at the center line 5-8 mm away from the right end of the test piece groove (301).
  6. 6. The injection-shearing test piece manufacturing die for the polymer-based wear-resistant lubricating material is characterized in that a piece taking groove (302) of the lower die (3) is positioned on the left side of a test piece groove (301), the area of a grooving area is 10mm multiplied by 10mm, the grooving depth is 8-12 mm, the area of the test piece groove (301) of the lower die (3) is 8cm multiplied by 2cm, and the depth is 6-10 mm.
  7. 7. The polymer-based wear-resistant lubricating material injection molding shearing test piece manufacturing die disclosed in claim 1 is characterized in that a test piece round hole (202) of the middle die (2) is positioned at the center line of the left end 5-8 mm of a test piece groove (301) of the lower die (3), and the diameters of the test piece round hole (202) and a test piece round hole positioning pin (101) are 5-8 mm.
  8. 8. The die for manufacturing the polymer-based wear-resistant lubricating material injection-molded shearing test piece according to claim 1, wherein the upper injection-molded port (107) and the lower injection-molded port (307) are combined to form a conical surface with a depth of 3.5-5.5 mm and a flaring angle of 75-83 degrees, the conical surfaces are positioned on the right end surfaces of the upper die and the lower die, and the central line of the conical surfaces is positioned at the positions of 35-40 mm on the rear end surfaces of the upper die and the lower die.
  9. 9. The injection-shearing test piece manufacturing die for the polymer-based wear-resistant lubricating material, as set forth in claim 1, is characterized in that the center lines of the test piece groove (301) and the pick-up groove (302) of the lower die are coincident with the center lines of the upper injection molding opening (107) and the lower injection molding opening (307).
  10. 10. The injection-shearing test piece manufacturing mold for the polymer-based wear-resistant lubricating material is characterized in that the mold is used in a mode that a middle mold (2) is assembled into a test piece groove (301) of a lower mold (3) in a mode that a test piece round hole (202) is arranged on the left, an upper mold (1) is assembled in a mode that an injection hole is aligned, a test piece round hole locating pin (101) is inserted, injection molding is conducted in a direction from the right to the left, after injection molding is completed, the upper mold (1) is opened, and the middle mold (2) and an injection-molded sample are integrally taken out from a piece taking groove (302) by a tool, wherein the whole is used for shear strength testing.

Description

Polymer-based wear-resistant lubricating material injection shearing test piece manufacturing die Technical Field The invention relates to the technical field of lubrication and injection molding, in particular to a manufacturing die for an injection-molded shearing test piece of a polymer-based wear-resistant lubricating material. Background The polymer-based lubricating material is an ideal self-lubricating material capable of replacing lubricating oil, such as polyether ether ketone (PEEK), polyimide (PI), epoxy resin and the like, and is widely used in the industries of aerospace, chemical industry, medical treatment, automobiles, electronics and the like. Most of the polymer-based lubricating material matrix is resin (plastic), and the most suitable forming mode is injection molding, and the mode has the advantages of high production efficiency, good dimensional accuracy and wide material adaptability, so that the injection molding mode is mostly adopted for parts with wear-resistant lubrication requirements such as automobile and rail transit parts, general machinery and equipment parts, special working condition parts and the like. In addition to considering the lubrication performance of the material, the adhesion capability of the material at the parts where lubrication is required, namely the shear strength, is also a part which is important to consider in design, and once the lubricated material falls off from the lubricated surface, lubrication failure can be caused, so that damage such as equipment damage can be caused. Therefore, the polymer-based lubricating material is attached to the parts requiring lubrication by means of injection molding, and the acquisition of the shear strength performance data is particularly important. However, at present, whether the design requirement can be met is mainly determined by directly testing the shearing strength of the final product, and for the product with larger volume and more complex structure in the design stage, once the requirement is not met, the corresponding mold is wasted, so that a certain resource waste is caused, the development of the test for optimizing the shearing performance is not facilitated, the flexibility is poor, and a simple and effective mode needs to be developed, so that the injection shearing strength data is scientifically obtained. Disclosure of Invention Based on the technical problems, the invention provides a polymer-based wear-resistant lubricating material injection molding shear test piece manufacturing die, which solves the problems that whether the design requirement can be met or not is mainly determined by directly testing the shear strength of a final product at present, and the corresponding die is wasted to a certain extent once the requirement is not met for a product with a larger volume and a more complex structure in the design stage. The injection molding shear strength data can be simply and effectively obtained, and the die can flexibly develop shear performance tests and optimization tests according to design requirements, so that the related research and development cost is remarkably reduced. In order to solve the technical problems, one of the purposes of the present invention is to provide a manufacturing mold for an injection-molded shear test piece of a polymer-based wear-resistant lubricating material, comprising: The upper die 1 comprises a test piece round hole positioning pin 101, a test piece round hole positioning hole 102, an upper die fixing screw hole I103, an upper die fixing screw hole II 104, an upper die positioning hole I105, an upper die positioning hole II 106 and an upper injection molding opening 107; A middle die 2, wherein the middle die comprises a key groove 201 and a test piece round hole 202; the lower die 3 comprises a test piece groove 301, a piece taking groove 302, a first lower die fixing screw hole 303, a second lower die fixing screw hole 304, a first lower die positioning pin hole 305, a second lower die positioning pin hole 306 and a lower injection molding opening 307; the middle die 2 is embedded into the lower die test piece groove 301, the upper die 1 and the lower die 3 are matched, and the middle die is fixed through fixing bolts and positioning pins. Further, the depth of the round hole 202 of the test piece of the middle die 2 is kept the same as that of the test piece groove 301 of the lower die 3, and the length and the width of the middle die 2 are kept the same as those of the test piece groove 301 of the die 3, so that the middle die 2 can be embedded into the test piece groove 301 of the lower die 3. Further, the shape of the key slot 201 of the middle mold includes, but is not limited to, one or any combination of several of a straight key slot, a dovetail key slot, a corrugated key slot, an array key slot or other shape key slot, the slotting position is a through key slot area or is located at any position of a key slot area, the slotting direct