An injection mold for a needle cage

By designing injection molds, the injection molding runner is formed by using the bonding and compacting of the moving mold and the fixed mold, the existing needle roller cage processing problems are solved, and the rapid and low-cost forming is achieved, which saves manpower and material resources.

CN112693079BActive Publication Date: 2025-06-17SHENZHEN SOUTH POLE OPTOELECTRONICS TECH
View PDF 2 Cites 0 Cited by

Patent Information

Application Number
CN202011595572.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2020-12-28
Publication Date
2025-06-17
Estimated Expiration
2040-12-28

AI Technical Summary

Technical Problem

Existing needle roller cages are usually processed through machining equipment, resulting in a long time, high cost and a waste of manpower and material resources.

Method used

An injection mold is designed, including a moving template and a fixed template. The injection molding runner is formed by bonding and pressing the moving mold kernel and a fixed mold kernel, and the needle roller slot and frame of the needle roller cage are formed using the forming groove and the core.

Benefits of technology

The rapid molding of the needle roller cage is achieved, which shortens production time, reduces costs, saves manpower and material resources, and improves production efficiency.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN112693079B_ABST
    Figure CN112693079B_ABST
Patent Text Reader

Abstract

The present invention discloses an injection mold for a needle cage, comprising: a moving template, on which a moving mold core is arranged, a molding groove is formed on the moving mold core, and a first water inlet groove communicating with the molding groove; a fixed template, the fixed template is provided with a fixed mold core matching with the moving mold core, a second water inlet groove matching with the first water inlet groove is formed on the fixed mold core, and the second water inlet groove communicates with a glue injection port; wherein, a plurality of core pins are arranged in the molding groove, the core pins are used for molding the needle grooves of the needle cage, and the gaps between adjacent core pins and the gaps between the core pins and the inner wall of the molding groove are all used for molding the body of the needle cage. The problem that in the prior art, the needle cage is usually processed by machining equipment, and the machining process is time-consuming, costly, and wastes manpower and material resources is solved.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The present invention relates to the field of injection molding, and particularly to an injection mold for a needle cage. Background Art

[0002] A needle cage is a workpiece holder for storing needles. The needle cage generally includes: a frame body, a needle groove formed on the frame body, the needle groove being used for accommodating needles, and a clamping position provided on the frame body to limit the needles so that the needles are firmly fixed in the needle groove.

[0003] The existing needle cages are usually processed by machining equipment, and the machining process is time-consuming, costly, and wastes human and material resources.

[0004] Therefore, the existing technology still needs to be improved and developed. Summary of the Invention

[0005] In view of the above deficiencies of the existing technology, the purpose of the present invention is to provide an injection mold for a needle cage, which solves the problems that the existing needle cages are usually processed by machining equipment, and the machining process is time-consuming, costly, and wastes human and material resources.

[0006] The technical solution of the present invention is as follows:

[0007] An injection mold for a needle cage, comprising:

[0008] A moving template, on which a moving mold core is provided, and a forming groove and a first water inlet groove communicating with the forming groove are formed on the moving mold core;

[0009] A fixed template, on which a fixed mold core matching with the moving mold core is provided, and a second water inlet groove matching with the first water inlet groove is formed on the fixed mold core, and the second water inlet groove communicates with a glue injection port;

[0010] Wherein, a plurality of core pins are arranged in the forming groove, the core pins are used for forming the needle grooves of the needle cage, and the gaps between adjacent core pins and the gaps between the core pins and the inner wall of the forming groove are used for forming the frame body of the needle cage.

[0011] Further, a core pin connecting block is connected to the plurality of core pins, and the core pin connecting block is clamped and fixed to the moving mold core;

[0012] The core pins protrude from the surface of the core pin connecting block facing the fixed template, and the core pin connecting block seals the opening on the side of the forming groove facing away from the fixed template.

[0013] Furthermore, the core is square, and curved surfaces are provided at both ends of one side surface of the square core, and the curved surface is used as a clamping position for clamping the needle roller of the molded needle roller retainer.

[0014] Further, the injection mold also includes a push mold assembly;

[0015] The ejection mold assembly comprises:

[0016] An ejector panel, the ejector panel is located at a side of the movable mold core away from the fixed mold plate, and the ejector panel is movably arranged close to or away from the fixed mold plate;

[0017] An ejector base plate, the ejector base plate being fixed on the ejector panel;

[0018] The ejector pin is fixedly arranged on the ejector bottom plate and penetrates the movable mold core.

[0019] Further, the ejector pins include: round ejector pins and square ejector pins;

[0020] The circular ejector pin is inserted into the first sprue groove, and the square ejector pin is inserted into the core connecting block.

[0021] Furthermore, a submersible glue inlet is provided on the movable mold core, and the first sprue groove is connected with the molding groove through the submersible glue inlet.

[0022] Furthermore, four molding grooves are provided, and the four molding grooves are used to mold needle roller cages of different specifications.

[0023] Further, the first nozzle groove includes a first nozzle transverse groove, a second nozzle transverse groove and a third nozzle transverse groove arranged in sequence side by side, and a first nozzle longitudinal groove connecting the first nozzle transverse groove, the second nozzle transverse groove and the third nozzle transverse groove;

[0024] The first sprue transverse groove and the third sprue transverse groove are respectively connected to the two molding grooves through the submersible glue inlet;

[0025] The two ends of the second water inlet transverse groove are respectively connected to the other two forming grooves through the submersible glue inlet.

[0026] Further, the circular ejector pin penetrates the first sprue transverse groove and / or the third sprue transverse groove to set the position of the submersible glue inlet; and / or

[0027] The circular ejector pin passes through the intersection of the first sprue transverse groove and the first sprue longitudinal groove, and / or the intersection of the third sprue transverse groove and the first sprue longitudinal groove.

[0028] Further, an elastic member is provided between the moving template and the ejector plate, and the elastic member pushes the ejector plate away from the moving template.

[0029] Advantages of this solution: An injection mold for a needle cage proposed by the present invention, wherein the moving mold core and the fixed mold core are respectively connected to the moving template and the fixed template to form an injection mold. During the injection process, the moving mold core and the fixed mold core are fitted and pressed tightly. The first water inlet groove and the second water inlet groove form a complete injection runner. The injection material enters the injection runner from the injection port and then flows into the forming groove for forming. In this way, through a plurality of core pins fixedly arranged in the forming groove, the core pins are used to form the needle grooves of the needle cage, and the gaps between adjacent core pins and the gaps between the core pins and the inner wall of the forming groove are all used to form the frame body of the needle cage, so that the needle cage can be injection molded. The needle cage injection molded in this way has a fast forming speed, short time consumption, low cost, saves manpower and material resources, and saves production costs. Description of the Drawings

[0030] Figure 1 is a structural schematic diagram of a needle cage;

[0031] Figure 2 is a cross-sectional view of an embodiment of an injection mold for a needle cage of the present invention;

[0032] Figure 3 is Figure 2 an enlarged view of part A of;

[0033] Figure 4 is an exploded view of an embodiment of an injection mold for a needle cage of the present invention;

[0034] Figure 5 is an exploded view of the moving mold core and the core pins of an embodiment of an injection mold for a needle cage of the present invention;

[0035] Figure 6 is Figure 5 an enlarged view of part B of;

[0036] Figure 7 is a structural schematic diagram of the moving mold core of an embodiment of an injection mold for a needle cage of the present invention;

[0037] Figure 8 is a structural schematic diagram of the ejector assembly of an embodiment of an injection mold for a needle cage of the present invention;

[0038] Figure 9 is a structural schematic diagram of the core pins of an embodiment of an injection mold for a needle cage of the present invention;

[0039] Figure 10 is Figure 9 an enlarged view of part C of;

[0040] Figure 11 This is the front view of an injection mold embodiment of a needle cage of the present invention.

[0041] Reference numerals in the figure: 100, needle cage; 110, cage body; 120, needle groove position; 130, clamping position; 200, moving mold; 210, moving template; 211, mold core installation groove; 220, moving mold core; 230, forming groove; 231, limiting groove; 240, first gate groove; 241, first horizontal gate groove; 242, second horizontal gate groove; 243, third horizontal gate groove; 244, first vertical gate groove; 250, submarine gate; 260, connecting block; 270, upper template; 300, fixed mold; 310, fixed template; 320, fixed mold core; 330, second gate groove; 340, injection port; 350, lower template; 400, core; 410, core connecting block; 411, hanging platform; 420, curved surface; 421, protruding arc; 422, concave arc; 500, mold pushing assembly; 510, ejector plate; 520, ejector base plate; 530, ejector pin; 531, round ejector pin; 532, square ejector pin; 540, elastic member. Detailed implementation manners

[0042] The present invention provides an injection mold for a needle cage. To make the purpose, technical solution and effects of the present invention clearer and more definite, the following further elaborates on the present invention with reference to the accompanying drawings and by way of examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] As Figure 1 、 Figure 2 shown, the present invention provides an injection mold for a needle cage 100, which is used to mold the needle cage 100. As Figure 2 shown, the injection mold includes: a moving mold 200 and a fixed mold 300. The moving mold 200 moves away from the fixed mold 300 during mold opening. The fixed mold 300 is provided with an injection port 340 for injecting glue by an injection molding machine. In a specific structure, the moving mold 200 includes a moving template 210, and a moving mold core 220 is arranged on the moving template 210. As Figure 3 、 Figure 5As shown, a molding groove 230 and a first water inlet groove 240 communicating with the molding groove 230 are formed on the moving mold core 220. For the convenience of structural description, the direction where the moving mold 200 is located is defined as the upper direction, and the direction where the fixed mold 300 is located is defined as the lower direction; the molding groove 230 is strip-shaped, the long side direction of the molding groove 230 is defined as the length direction (X direction), the short side direction of the molding groove 230 is defined as the width direction (Y direction), and the depth direction of the molding groove 230 is along the up and down direction. For simplicity of description, the surfaces in the left and right directions are defined as the side surfaces or side walls. The first water inlet groove 240 is formed on the lower surface of the moving mold core 220. As Figure 2 , Figure 4 shown, the fixed mold 300 includes a fixed template 310, a fixed mold core 320 matching with the moving mold core 220 is arranged on the fixed template 310, a second water inlet groove 330 matching with the first water inlet groove 240 is formed on the fixed mold core 320, and the second water inlet groove 330 communicates with a glue injection port 340. In a specific structure, the second water inlet groove 330 is located on the upper surface of the fixed mold core 320. During the injection molding process, the moving mold core 220 and the fixed mold core 320 are pressed against each other. The first water inlet groove 240 and the second water inlet groove 330 form a complete injection molding runner, and the injection molding material enters the injection molding runner from the glue injection port 340 and then flows into the molding groove 230 for molding.

[0044] As Figure 3 , Figure 5 shown, a plurality of core molds 400 are arranged in the molding groove 230. The core molds 400 are used to mold the needle grooves 120 of the needle cage 100. When the injection molding material is molded around the outer wall of the core mold 400, the injection molded part falls off the mold, and an inner cavity is left at the position where the core mold 400 is located. This inner cavity serves as the needle groove 120 of the needle cage. The gaps between adjacent core molds 400 and the gaps between the core molds 400 and the inner wall of the molding groove 230 are all used to mold the frame 110 of the needle cage 100. When the injection molding material fills the gaps between the core molds 400 and the gaps between the core molds 400 and the inner wall of the molding groove 230 and then solidifies, the injection molded part falls off the mold, and the injection molding material at the positions of the gaps solidifies into a solid, thus forming the frame 110 of the needle cage.

[0045] In the above solution, the moving template 210 and the fixed template 310 are respectively connected to the moving mold core 220 and the fixed mold core 320 to form an injection mold. During the injection process, the moving mold core 220 and the fixed mold core 320 are fitted and pressed tightly. The first water inlet groove 240 and the second water inlet groove 330 form a complete injection runner. The injection plastic enters the injection runner from the injection port 340 and then flows into the molding groove 230 for molding. In this way, through a plurality of mold cores 400 fixedly arranged in the molding groove 230, the mold cores 400 are used to form the needle slots 120 of the needle cage 100, and the gaps between adjacent mold cores 400 and the gaps between the mold cores 400 and the inner wall of the molding groove 230 are all used to form the cage body 110 of the needle cage, so that the needle cage can be injection molded. The needle cage injection molded in this way has a fast molding speed, short time consumption, low cost, saves manpower and material resources, and saves production costs.

[0046] As Figure 5 shown, in the specific structure of this embodiment, a mold core connecting block 410 is connected to a plurality of the mold cores 400, and the mold core connecting block 410 is clamped and fixed to the moving mold core 220. In the specific structure, the mold core connecting block 410 and the mold core 400 are integrally formed. The mold core connecting block 410 is strip-shaped and extends along the length direction. A plurality of the mold cores 400 are arranged on one mold core connecting block 410, and the plurality of mold cores 400 are arranged at intervals along the length direction. The mold core connecting block 410 is clamped in the molding groove 230 along the up and down direction, and a plurality of the mold core connecting blocks 410 are arranged in the molding groove 230 along the width direction. The mold core 400 protrudes from the surface of the mold core connecting block 410 facing the fixed template 310, that is, the mold core 400 is arranged on the upper surface of the mold core connecting block 410. The mold core connecting block 410 seals the opening on the side of the molding groove 230 facing away from the fixed template 310, so that the upper surface of the needle cage 100 is formed by the lower surface of the mold core connecting block 410. As Figure 9 shown, in order to realize the fixation of the mold core connecting block 410 on the moving mold core 220, a hanging platform 411 protrudes from the side wall of the mold core connecting block 410. As Figure 7 shown, a limiting groove 231 is opened on the upper surface of the moving mold core 220 and at the edge of the molding groove 230. The hanging platform 411 abuts against the limiting groove 231, so that the position of the mold core connecting block 410 in the molding groove 230 is limited and will not move downward. As Figure 1 shown, in addition, a mold core installation groove 211 is opened on the moving template 210, and the moving mold core 220 is installed in the mold core installation groove 211. In this way, the upper surface of the mold core connecting block 410 abuts against the upper surface of the mold core installation groove 211, so that the mold core connecting block 410 is fixed in the moving mold core 220.

[0047] As Figure 9, Figure 10 As shown, the core 400 is square, and curved surfaces 420 are provided at both ends of one side of the square core 400. The curved surface 420 is used to form the clamping position 130 for clamping the needle roller in the needle roller retainer 100. The curved surface 420 is recessed in the side of the core 400, so that when the injection molding material is formed at the position of the curved surface 420, a structure protruding from the inner wall of the needle roller slot 120 will be formed, and the structure is the clamping position 130 for limiting the needle roller. The contour of the curved surface 420 on the vertical section perpendicular to the length direction is a waveform, and the waveform includes a convex arc 421 located in the middle, and a concave arc 422 connected to the upper and lower ends of the convex arc 421. The outer contour of the protruding arc 421 is used to form a groove of the engaging position 130 of the needle roller cage, while the outer contour of the concave arc 422 is used to form a engaging platform of the engaging position 130 of the needle roller cage.

[0048] like Figure 4 , Figure 8 As shown, the injection mold further includes a push mold assembly 500. When the movable mold 200 and the fixed mold 300 are ejected from the mold, the push mold assembly 500 is used to push out the needle roller retainer 100 pulled out together with the movable mold 200. The push mold assembly 500 includes: an ejector panel 510, an ejector bottom plate 520, and an ejector 530. The ejector panel 510 is located on the side of the movable mold core 220 away from the fixed mold plate 310, and the ejector panel 510 is movably arranged close to or away from the fixed mold plate 310. The ejector bottom plate 520 is fixed on the ejector panel 510, and the ejector 530 is fixedly arranged on the ejector bottom plate 520 and penetrates the movable mold core 220. During demolding, the ejector plate 510 and the ejector bottom plate 520 are pushed by the ejector rod of the injection molding machine, so that the ejector plate 510 and the ejector bottom plate 520 move toward the movable mold plate 210, so that the ejector 530 also moves toward the fixed mold plate 310, and the ejector 530 pushes against the needle roller cage, so that the needle roller cage is separated from the core 400, thereby realizing the demolding process.

[0049] like Figure 3 , Figure 5 As shown, the ejector pin 530 in this embodiment includes: a round ejector pin 531 and a square ejector pin 532. The round ejector pin 531 is inserted into the first sprue groove 240, and the square ejector pin 532 is inserted into the core connection block 410. The square ejector pin 532 is cylindrical at one end facing the ejector base plate 520, and is square at one end inserted into the core connection block 410. After the square ejector pin 532 is inserted into the core connection block 410, its lower surface abuts against the formed roller retainer. When the ejector assembly 500 ejects the workpiece, the square ejector pin 532 is used to eject the roller retainer.

[0050] Both the upper and lower ends of the circular ejector pin 531 are circular. The circular ejector pin 531 is used to be inserted into the first gate slot 240. When the mold pushing assembly 500 ejects the workpiece, the circular ejector pin 531 is used to eject the gate material formed in the injection runner.

[0051] As Figure 6 shown, a submarine gate 250 is provided on the moving mold core 220. The first gate slot 240 is communicated with the molding slot 230 through the submarine gate 250. The submarine gate 250 is opened on the side of the first gate slot 240. When the injection molding material is molded in the mold, the gate materials at the submarine gate 250 are respectively connected to the gate material in the first gate slot 240 and the needle cage 100 in the molding slot. When demolding, the ejector pin 530 ejects the injection molded part, and the submarine gate 250 breaks the gate material. The gate material connecting the needle cage 100 side is thinner, so that the needle cage falls off from the gate material, and the needle cage can be obtained without an additional gate cutting process.

[0052] As Figure 5 shown, four molding slots 230 are provided in this embodiment. The four molding slots 230 are used to mold different specifications of needle cages. In this way, four needle cages can be produced in one molding, improving the production efficiency.

[0053] In the specific structure of this embodiment, the first gate slot 240 includes a first gate cross slot 241, a second gate cross slot 242, a third gate cross slot 243, and a first gate longitudinal slot 244. The first gate cross slot 241, the second gate cross slot 242, and the third gate cross slot 243 are arranged side by side in the width direction. The first gate cross slot 241, the second gate cross slot 242, and the third gate cross slot 243 all extend in the length direction. The first gate longitudinal slot 244 is arranged in the length direction and communicates with the first gate cross slot 241, the second gate cross slot 242, and the third gate cross slot 243. The first gate cross slot 241 and the third gate cross slot are respectively communicated with two molding slots 230 through the submarine gate 250. The two molding slots 230 are located on the left and right sides. The two ends of the second gate cross slot 242 are respectively communicated with the other two molding slots 230 through the submarine gate 250. The other two molding slots 230 are located in the middle. The gate is arranged at the center position of the fixed mold 300. Therefore, the intersection of the second gate cross slot 242 and the first gate longitudinal slot in this solution is located at the center of the moving mold 200, so that it matches the gate, thereby realizing uniform filling of each molding slot 230.

[0054] As Figure 3 、 Figure 5As shown, the circular ejector pin 531 penetrates through the position on the first runner cross groove 241 and / or the third runner cross groove 243 for arranging the submarine gate 250, and / or the circular ejector pin 531 penetrates through the intersection of the first runner cross groove 241 and the first runner longitudinal groove 244, and / or the intersection of the third runner cross groove 243 and the first runner longitudinal groove 244. In this embodiment, multiple submarine gates 250 are located at both ends of the first runner cross groove 241, the second runner cross groove 242, and the third runner cross groove 243 along the length direction, and are also located at the connection of the third runner cross groove 243 and the first runner longitudinal groove 244. Since the submarine gates 250 are opened at both ends of the first runner cross groove 241, the runner material in the submarine gates 250 can be directly stressed and is more easily broken. Moreover, the injection molded part is pushed at both ends, so that the injection molded part is stressed evenly and the formed needle cage is not easily damaged.

[0055] As Figure 2 , Figure 11 shown, other structures in this embodiment further include: connection blocks 260 arranged on both sides of the upper surface of the moving template 210, and an upper template 270 arranged on the upper surfaces of the connection blocks 260 on both sides. The ejector pin plate 510 and the ejector pin base plate 520 are located between the connection plates on both sides. A through hole with a diameter of 35 MM is opened on the upper template 270. The ejector rod of the injection molding machine passes through the through hole and abuts against the mold pushing assembly 500, thereby driving the mold pushing assembly 500 to move.

[0056] A lower template 350 is fixedly arranged on the fixed template 310. The lower template 350 is located on the lower surface of the fixed template 310. A glue injection port 340 is arranged on the lower template 350, and the glue injection port 340 communicates with the second runner groove 330.

[0057] As Figure 2 , Figure 11 shown, in addition, in order to make the moving template 210 and the fixed template 310 fit with high precision, guide columns and sliding sleeves are respectively arranged on the moving template 210 and the fixed template 310. The cooperation of the guide columns and the guide sleeves enables the moving template 210 and the fixed template 310 not to be displaced during mold opening and sliding. An elastic member 540 is arranged between the moving template 210 and the ejector pin base plate 520, and the elastic member 540 is a spring. The elastic member 540 pushes the ejector pin base plate 520 away from the moving template 210.

[0058] In summary, an injection mold for a needle cage of the present invention is proposed. Among them, the moving template 210 and the fixed template 310 are respectively connected to the moving mold core 220 and the fixed mold core 320 to form an injection mold. During the injection process, the moving mold core 220 and the fixed mold core 320 are fitted and pressed tightly. The first water inlet groove 240 and the second water inlet groove 330 form a complete injection runner. The injection plastic enters the injection runner from the injection port 340 and then flows into the molding groove 230 for molding. In this way, through a plurality of core molds 400 fixedly arranged in the molding groove 230, the core molds 400 are used to form the needle grooves 120 of the needle cage 100, and the gaps between adjacent core molds 400 and the gaps between the core molds 400 and the inner wall of the molding groove 230 are all used to form the frame body 110 of the needle cage 100, so that the needle cage 100 can be injection molded. The needle cage injection molded in this way has a fast molding speed, short time consumption, low cost, saves manpower and material resources, and saves production costs.

[0059] It should be understood that the application of the present invention is not limited to the above examples. For those of ordinary skill in the art, improvements or changes can be made according to the above description, and all such improvements and changes should fall within the protection scope of the appended claims of the present invention.

Claims

1. An injection mold for a needle cage, characterized in that, Comprising: A moving template, on which a moving mold core is provided. A molding groove is formed on the moving mold core, and a first water inlet groove communicating with the molding groove; A fixed template, on which a fixed mold core matching the moving mold core is provided. A second water inlet groove matching the first water inlet groove is formed on the fixed mold core, and the second water inlet groove communicates with a glue injection port; Wherein, a plurality of core pins are arranged in the molding groove. The core pins are used for molding the needle grooves of the needle cage. The gaps between adjacent core pins and the gaps between the core pins and the inner wall of the molding groove are all used for molding the body of the needle cage; A core pin connecting block is connected to the plurality of core pins, and the core pin connecting block is clamped and fixed to the moving mold core; the core pins protrude from the surface of the core pin connecting block facing the fixed template, and the core pin connecting block seals the opening on the side of the molding groove facing away from the fixed template; a hanging platform protrudes from the side wall of the core pin connecting block, and a limiting groove is formed on the upper surface of the moving mold core and at the edge of the molding groove. The hanging platform abuts against the limiting groove, so that the position of the core pin connecting block in the molding groove is limited and will not move downward; The injection mold further includes a mold pushing assembly, and the mold pushing assembly includes: a thimble panel, a thimble bottom plate and thimbles. The thimble panel is located on the side of the moving mold core facing away from the fixed template, and the thimble panel is movably arranged close to or away from the fixed template. The thimble bottom plate is fixed on the thimble panel, and the thimbles are fixedly arranged on the thimble bottom plate and penetrate through the moving mold core; During demolding, the thimble panel and the thimble bottom plate are pushed by the ejector rod of the injection molding machine, so that the thimble panel and the thimble bottom plate move towards the moving template, and thus the thimbles also move towards the fixed template. The thimbles push against the needle cage, so that the needle cage is separated from the core pins; The core pins are square, and curved surfaces are arranged at both ends of one side surface of the square core pins. The curved surfaces are used for molding the clamping positions for the needle cage to hold the needles; The contour of the curved surface in the vertical section perpendicular to the length direction is wavy, and the wave shape includes a protruding arc in the middle and concave arcs smoothly connected to the upper and lower ends of the protruding arc.

2. The injection mold for a needle cage according to claim 1, characterized in that, The thimbles include: round thimbles and square thimbles; The round thimbles are arranged in the first water inlet groove, and the square thimbles are arranged in the core pin connecting block.

3. The injection mold for a needle cage according to claim 2, characterized in that, A submarine gate is formed on the moving mold core, and the first water inlet groove is communicated with the molding groove through the submarine gate.

4. The injection mold for a needle cage according to claim 3, characterized in that, Four molding grooves are provided, and the four molding grooves are used for molding needle cages of different specifications.

5. The injection mold for a needle cage according to claim 4, characterized in that, The first water inlet groove includes a first water inlet transverse groove, a second water inlet transverse groove and a third water inlet transverse groove arranged side by side in sequence, and a first water inlet longitudinal groove communicating the first water inlet transverse groove, the second water inlet transverse groove and the third water inlet transverse groove; The first water inlet transverse groove and the third water inlet transverse groove are respectively communicated with two molding grooves through the submarine gate; Both ends of the second water inlet transverse groove are respectively communicated with the other two molding grooves through the submarine gate.

6. The injection mold for a needle cage according to claim 5, characterized in that, The circular ejector pin penetrates through the position for arranging the submarine gate on the first runner cross groove and / or the third runner cross groove; and / or The circular ejector pin penetrates through the intersection of the first runner cross groove and the first runner longitudinal groove, and / or the intersection of the third runner cross groove and the first runner longitudinal groove.

7. The injection mold for a needle cage according to claim 6, characterized in that, An elastic member is arranged between the moving template and the ejector plate, and the elastic member pushes the ejector plate away from the moving template.

Citation Information

Patent Citations

  • Injection mold of double-row roller pin retainer

    CN211730041U

  • Injection mold of needle roller retainer

    CN216230469U