A PEEK engineering plastic gear injection molding mold and method thereof

Abstract

The present invention relates to the field of injection molding technology, specifically to a PEEK engineering plastic gear injection molding mold and method thereof. A PEEK engineering plastic gear injection molding mold and method thereof, comprising a bottom plate, a fixed ring fixedly connected to the top of the bottom plate, an annular limiting groove provided in the fixed ring, a plurality of limiting blocks slidably connected to the inner circumferential wall of the annular limiting groove, a sleeve fixedly connected to one side of the plurality of limiting blocks, a cavity provided in the sleeve, a connecting rod slidably connected in the cavity, a bracket fixedly connected to the top of the fixed ring, the beneficial effect of the present invention is: the PEEK engineering plastic gear injection molding mold and method thereof, after the slider is reversed to limit the shaping alloy strip, the inner diameter of the shaping alloy strip can be controlled by changing the height of the lifting block, so that it is adapted to the gear size required to be formed, and then the gear size range that can be formed by the mold is wider, thereby making the molding effect of the mold more practical.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, in particular to a PEEK engineering plastic gear injection molding mold and a method thereof. Background Art

[0002] PEEK engineering plastic gear is a high-performance gear product made of polyetheretherketone (PEEK), an engineering plastic material. PEEK material itself has a variety of excellent properties, which make PEEK engineering plastic gears widely used in many fields. PEEK has the following characteristics:

[0003] High and low temperature resistance: PEEK gears can still maintain good performance and work normally at high temperatures (260°C), and the continuous use temperature can even reach 300°C. At the same time, they still have excellent toughness and no brittle cracking at low temperatures (-50°C); Chemical corrosion resistance: PEEK gears have good physical and chemical properties and can resist the erosion of various chemical substances; Self-lubrication: PEEK material has self-lubrication, which makes PEEK gears have low noise, high wear resistance, and no lubrication. Mechanical properties: PEEK is a plastic that has both toughness and rigidity and achieves a balance. In particular, its excellent fatigue resistance to alternating stress is outstanding among all plastics and can be comparable to alloy materials;

[0004] When using a mold to form a gear, the size of the gear needs to be finalized to a corresponding state according to the user's needs so that it can be provided to the user for use;

[0005] However, when the existing PEEK engineering plastic gear injection molding mold is used for auxiliary molding during the gear molding process, the size of the gear molded by a single mold is fixed, which makes the effect of the mold too single, resulting in limited use of the mold. Summary of the invention

[0006] The present invention aims at the technical problems existing in the prior art and provides a PEEK engineering plastic gear injection molding mold and a method thereof to solve the problem that the existing PEEK engineering plastic gear injection molding mold and a method thereof mentioned above are difficult to adjust the mold according to the gear size required by the user.

[0007] The technical solution of the present invention to solve the above technical problems is as follows: a PEEK engineering plastic gear injection molding mold, including a base plate, a fixing ring is fixedly connected to the top of the base plate, an annular limit groove is opened in the fixing ring, a plurality of limit blocks are slidably connected to the inner circumferential wall of the annular limit groove, one side of the plurality of limit blocks is fixedly connected to a sleeve, a cavity is opened in the sleeve, and a connecting rod is slidably connected in the cavity.

[0008] A PEEK engineering plastic gear injection molding method comprises the following steps:

[0009] Step S1, connection: after fixing a plurality of connecting rods to the outer peripheral wall of the shaped alloy strip, the connecting rods are connected to the sleeve, and the connecting rods can slide under the action of the sleeve so that the two form a retractable state, so that the distance between the shaped alloy strip and the fixing ring is in a variable state;

[0010] Step S2, limiting: the shaped alloy strip is indirectly limited by the cooperation of the annular limiting groove and the limiting block, so that the shaped alloy strip is always at a corresponding height based on the fixing ring;

[0011] Step S3, adjustment: based on the fact that the height of the shaping alloy strip remains unchanged, the height of the lifting block is changed, and then the cross angles of the linkage rod, the lifting block and the connecting shaft are controlled to change, so that the spacing of the multiple sliders can be adjusted and matched with the size of the gear to be injected by the user, so that after the multiple sliders limit the shaping alloy strip, the inner diameter of the shaping alloy strip is matched with the diameter of the gear to be injected;

[0012] Step S4, seam filling: Finally, after the adjustment is completed, the length of the shaped alloy strip is greater than the circumference after shaping due to the change in the inner diameter of the shaped alloy strip. Then, the excess shaped alloy strip can be fitted at its ends and pulled outward, and then the shaped alloy strip is completely fitted with its ends by a roller with tension, so that the gap at the contact position between the two is reduced, thereby assisting the shaped alloy strip in shaping the gear.

[0013] The beneficial effects of the present invention are:

[0014] The present invention makes improvements on the existing basis. After the height of the limit block is limited by the annular limit groove, the shaped alloy belt can always be in a fixed state based on the height of the fixing ring, and then the shaped alloy belt can be limited. Then, based on this, the auxiliary upgrade block makes corresponding adjustments to the shaped alloy belt after moving up and down, and the curvature change during the adjustment of the shaped alloy belt can make the connecting rod, sleeve and limit block freely change direction under the action of the annular limit groove, and because one end of the annular limit groove is provided with an opening, the shaped alloy belt can be detached from the opening after the length of the shaped alloy belt exceeds the circumference of the gear to be shaped, so as to ensure the normal adjustment effect of the shaped alloy belt.

[0015] Based on the above technical solution, the present invention can also be improved as follows.

[0016] Furthermore, the top of the fixing ring is fixedly connected with a bracket, the end of the bracket is fixedly connected with a top plate, the bottom of the top plate is fixedly connected with a hydraulic rod, the end of the hydraulic rod is fixedly connected with a lifting block, the end of the connecting rod is fixedly connected with a shaping alloy belt, a limiting slide groove is provided in the shaping alloy belt, a plurality of sliders are symmetrically arranged on the inner peripheral wall of the limiting slide groove, the plurality of sliders are slidingly connected to the shaping alloy belt through the limiting slide groove, the tops of the plurality of sliders are fixedly connected with connecting shafts, the tops of the plurality of connecting shafts are hingedly connected with linkage rods, and the ends of the plurality of linkage rods are hingedly connected to the lifting block.

[0017] The beneficial effect of adopting the above further scheme is that the lifting block is set on the top of the top plate through the hydraulic rod, and after the length of the hydraulic rod changes, the height of the lifting block can be changed, and then a limiting slide groove is opened in the shaping alloy belt to enable the slider to slide in the limiting slide groove, and because the diameter of the slider is larger than the opening inner diameter of the limiting slide groove, the slider cannot be separated from the limiting slide groove, thereby making the height of the slider unchanged based on the shaping alloy belt, and then after the linkage rod is hingedly connected to the connecting shaft and the lifting block respectively, the linkage rod and the intersection angle of the two can be driven to change synchronously according to the height change of the lifting block, so that The spacing between multiple sliders is changed to match the size of the gear to be formed, and based on the change in the spacing between the multiple sliders, the circumference of the molded alloy strip wrapped around the outer peripheral wall of the gear to be formed changes accordingly. Then, the slider is allowed to slide in the limiting slide groove as the circumference of the molded alloy strip changes, so that it does not affect the change in the circumference of the molded alloy strip. Therefore, after the slider is reversed to limit the molded alloy strip, the inner diameter of the molded alloy strip can be controlled by controlling the height of the lifting block to make it match the size of the gear to be formed, thereby enabling the mold to form a wider range of gear sizes, thereby making the molding effect of the mold more practical.

[0018] Furthermore, a fixed block is fixedly connected to the top of one end of the shaped alloy strip, an inner cavity is opened in the fixed block, a T-shaped rod is slidably connected to the inner circumferential wall of the inner cavity, a pull rod is fixedly connected to the end of the T-shaped rod, a tension spring is sleevedly connected to the outer circumferential wall of the T-shaped rod, both ends of the tension spring are respectively fixedly connected to the fixed block, i.e., the pull rod, and the bottom of the pull rod is rotatably connected to two rollers.

[0019] The beneficial effect of adopting the above-mentioned further scheme is that the fixed block is fixed to one end of the shaped alloy strip, and an inner cavity is opened in the fixed block so that the T-bar can slide in the inner cavity, and then the end of the T-bar is fixed to the pull rod, and the pull rod and the fixed block are connected by a tension spring, so that the fixed block has a pulling force on the pull rod, thereby reducing the distance between the pull rod and the fixed block, and a rotatable roller is provided at the bottom of the pull rod, and the excess shaped alloy strip passes between the pull rod and the fixed block, and is fitted with the shaped alloy strip by the roller, so that under the extrusion effect of the roller on the shaped alloy strip, the excess part of the shaped alloy strip can be tightly fitted with its end, thereby reducing the gap between the two, and at the same time, the rotatable effect of the roller does not affect the inner diameter adjustment of the shaped alloy strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a front cross-sectional structural schematic diagram of the present invention;

[0022] Figure 3 yes Figure 2 The enlarged structural diagram at A in the middle;

[0023] Figure 4 It is a schematic diagram of a top cross-sectional structure of the present invention;

[0024] Figure 5 It is a schematic diagram of the side cross-sectional structure of the shaped alloy strip in the present invention;

[0025] Figure 6 yes Figure 4 Enlarged structural diagram at B in the middle.

[0026] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0027] 1. Bottom plate; 2. Fixed ring; 201. Annular limit groove; 202. Limit block; 203. Sleeve; 204. Cavity; 205. Connecting rod; 3. Bracket; 4. Top plate; 401. Hydraulic rod; 402. Lifting block; 5. Shaped alloy belt; 501. Limit slide groove; 502. Sliding block; 503. Connecting shaft; 504. Linking rod; 6. Fixed block; 601. Inner cavity; 602. T-bar; 603. Tension spring; 604. Pull rod; 605. Roller. DETAILED DESCRIPTION

[0028] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0029] PEEK engineering plastic gear is a high-performance gear product made of polyetheretherketone (PEEK), an engineering plastic material. The PEEK material itself has a variety of excellent properties, which make PEEK engineering plastic gears widely used in many fields. The inventors have proposed a PEEK engineering plastic gear injection molding mold and a method to solve the above problems.

[0030] The present invention provides the following preferred embodiments

[0031] like Figure 1-6 As shown, a PEEK engineering plastic gear injection molding mold includes a base plate 1, a fixing ring 2 is fixedly connected to the top of the base plate 1, an annular limiting groove 201 is opened in the fixing ring 2, a plurality of limiting blocks 202 are slidably connected to the inner circumferential wall of the annular limiting groove 201, a sleeve 203 is fixedly connected to one side of the plurality of limiting blocks 202, a cavity 204 is opened in the sleeve 203, a connecting rod 205 is slidably connected in the cavity 204, the fixing ring 2 is arranged on the top of the base plate 1, and an annular limiting groove 201 is opened inside it based on the shape of the fixing ring 2, and then the limiting block 202 can slide on the inner circumferential wall of the annular limiting groove 201, so that the sleeve 203 changes its direction after being fixed to the limiting block 202, and then the connecting rod 205 can slide based on the sleeve 203 through the cavity 204 opened in the sleeve 203, and the end of the connecting rod 205 It is fixed to the shaping alloy strip 5, and then the shaping alloy strip 5 can be indirectly connected to the fixing ring 2, and the distance between the two can be freely changed. In the process of change, the height of the limit block 202 is limited by the annular limit groove 201, so that the shaping alloy strip 5 is always in a fixed state based on the height of the fixing ring 2, and then the shaping alloy strip 5 can be limited. Then, based on this, the auxiliary upgrade block 402 makes corresponding adjustments to the shaping alloy strip 5 after moving up and down, and the curvature change during the adjustment of the shaping alloy strip 5 can make the connecting rod, sleeve 203 and limit block 202 freely change direction under the action of the annular limit groove 201, and because one end of the annular limit groove 201 is provided with an opening, the shaping alloy strip 5 can be detached from the opening after the length of the shaping alloy strip 5 exceeds the circumference of the gear to be shaped, so as to ensure the normal adjustment effect of the shaping alloy strip 5.

[0032] In this embodiment, Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, in order to further enable the mold to have a controllable molding size effect when the gear is injection molded, the top of the fixed ring 2 is fixedly connected to a bracket 3, the end of the bracket 3 is fixedly connected to a top plate 4, the bottom of the top plate 4 is fixedly connected to a hydraulic rod 401, the end of the hydraulic rod 401 is fixedly connected to a lifting block 402, the end of the connecting rod 205 is fixedly connected to a shaping alloy belt 5, a limiting slide groove 501 is provided in the shaping alloy belt 5, and a plurality of sliders 502 are symmetrically arranged on the inner peripheral wall of the limiting slide groove 501, and the plurality of sliders 502 are connected to the shaping alloy belt 5 through the limiting slide groove 501. Sliding connection, the tops of multiple sliders 502 are fixedly connected with connecting shafts 503, the tops of multiple connecting shafts 503 are hingedly connected with linkage rods 504, the ends of multiple linkage rods 504 are hingedly connected with lifting blocks 402, the lifting blocks 402 are arranged on the top of the top plate 4 through hydraulic rods 401, and after the length of the hydraulic rods 401 changes, the height of the lifting blocks 402 can be changed, and then a limiting slide groove 501 is opened in the shaping alloy belt 5, so that the slider 502 can slide in the limiting slide groove 501, and due to the large diameter of the slider 502 The inner diameter of the opening of the limiting slide groove 501 is adjusted to prevent the slider 502 from escaping from the limiting slide groove 501, thereby keeping the slider 502 in a constant height based on the shaped alloy strip 5. Then, the linkage rod 504 is hingedly connected to the connecting shaft 503 and the lifting block 402 respectively, and the linkage rod 504 and the crossing angle of the two can be changed synchronously according to the height change of the lifting block 402, thereby changing the spacing between the multiple sliders 502 and matching them with the gear size to be formed. Based on the spacing change of the multiple sliders 502, it is used for The circumference of the shaped alloy strip 5 wrapped around the outer peripheral wall of the gear to be formed changes accordingly, and then the slider 502 slides in the limiting slide groove 501 as the circumference of the shaped alloy strip 5 changes, so that it does not affect the change in the circumference of the shaped alloy strip 5. Therefore, after the slider 502 is reversed to limit the shaped alloy strip 5, the inner diameter of the shaped alloy strip 5 can be controlled by controlling the height of the lifting block 402 to make it compatible with the size of the gear to be formed, thereby enabling the mold to form a wider range of gear sizes, thereby making the molding effect of the mold more practical.

[0033] In this embodiment, Figure 4 , Figure 5 and Figure 6As shown, in order to further improve the seam repairing effect of the shaped structure after the size of the gear shaped by the mold changes, a fixed block 6 is fixedly connected to the top of one end of the shaped alloy strip 5, and an inner cavity 601 is opened in the fixed block 6. The inner peripheral wall of the inner cavity 601 is slidably connected to a T-shaped rod 602, and the end of the T-shaped rod 602 is fixedly connected to a pull rod 604. The outer peripheral wall of the T-shaped rod 602 is sleeved with a tension spring 603. The two ends of the tension spring 603 are respectively fixedly connected to the fixed block 6, that is, the pull rod 604. The bottom of the pull rod 604 is rotatably connected to two rollers 605. The fixed block 6 is fixed to one end of the shaped alloy strip 5, and the inner cavity 601 is opened in the fixed block 6, so that the T-shaped rod 602 can slide in the inner cavity 601. Thereafter, the end of the T-bar 602 is fixed to the pull rod 604, and the pull rod 604 is connected to the fixed block 6 by a tension spring 603, so that the fixed block 6 has a pulling force on the pull rod 604, thereby reducing the distance between the pull rod 604 and the fixed block 6, and a rotatable roller 605 is set at the bottom of the pull rod 604, and the protruding shaped alloy strip 5 passes between the pull rod 604 and the fixed block 6, and is fitted with the shaped alloy strip 5 by the roller 605, so that under the extrusion effect of the roller 605 on the shaped alloy strip 5, the protruding part of the shaped alloy strip 5 can be tightly fitted with its end, thereby reducing the gap between the two, and at the same time, the rotatable effect of the roller 605 does not affect the inner diameter adjustment of the shaped alloy strip 5.

[0034] A PEEK engineering plastic gear injection molding method, comprising the following steps:

[0035] Step S1, connection: After fixing a plurality of connecting rods 205 to the outer peripheral wall of the shaping alloy strip 5, the connecting rods 205 are connected to the sleeve 203, and the connecting rods 205 can slide under the action of the sleeve 203 so that the two form a retractable state, so that the distance between the shaping alloy strip 5 and the fixing ring 2 is in a variable state;

[0036] Step S2, limiting: the annular limiting groove 201 and the limiting block 202 are used to indirectly limit the shaped alloy strip 5, so that the shaped alloy strip 5 is always at a corresponding height based on the fixing ring 2;

[0037] Step S3, adjustment: based on the fact that the height of the shaped alloy strip 5 remains unchanged, the height of the lifting block 402 is changed, and then the cross angles of the linkage rod 504, the lifting block 402 and the connecting shaft 503 are controlled to change, so that the spacing of the plurality of sliders 502 can be adjusted and adapted to the size of the gear to be injected by the user, so that after the plurality of sliders 502 limit the shaped alloy strip 5, the inner diameter of the shaped alloy strip 5 is adapted to the diameter of the gear to be injected;

[0038] Step S4, seam filling: Finally, after the adjustment is completed, the length of the shaped alloy strip 5 is greater than the circumference after shaping due to the change in the inner diameter of the shaped alloy strip 5. Then, the excess shaped alloy strip 5 can be fitted at its end and pulled outward, and then the shaped alloy strip 5 is completely fitted with its end by the roller 605 with tension, so that the gap at the contact position between the two is reduced, thereby assisting the shaped alloy strip 5 in shaping the gear.

[0039] The specific working process of the present invention is as follows:

[0040] (1) Connection

[0041] After a plurality of connecting rods 205 are fixed to the outer peripheral wall of the shaping alloy belt 5, the connecting rods 205 are connected to the sleeve 203, and the connecting rods 205 can slide under the action of the sleeve 203, and the two form a retractable state, so that the distance between the shaping alloy belt 5 and the fixing ring 2 is in a variable state;

[0042] (2) Limit

[0043] At the same time, the cooperation between the annular limiting groove 201 and the limiting block 202 indirectly limits the shaped alloy strip 5, so that the shaped alloy strip 5 is always at a corresponding height based on the fixing ring 2;

[0044] (3) Adjustment

[0045] Then, based on the fact that the height of the shaped alloy strip 5 remains unchanged, the height of the lifting block 402 is changed, and then the crossing angles of the linkage rod 504, the lifting block 402 and the connecting shaft 503 are controlled to change, so that the spacing between the multiple sliders 502 can be adjusted and matched with the size of the gear to be injected by the user, that is, after the multiple sliders 502 limit the shaped alloy strip 5, the inner diameter of the shaped alloy strip 5 is matched with the diameter of the gear to be injected;

[0046] (4) Seam repair

[0047] Finally, after the adjustment is completed, due to the change in the inner diameter of the shaped alloy strip 5, the length of the shaped alloy strip 5 is greater than the circumference after shaping. Then, the excess shaped alloy strip 5 can be fitted at its ends and pulled outward, and then the shaped alloy strip 5 and its ends are completely fitted by the roller 605 with tension, so that the gap between the two contact positions is reduced, thereby assisting the shaped alloy strip 5 in shaping the gear.

[0048] In summary: The beneficial effects of the present invention are specifically embodied in that the mold is improved on the existing basis, and the PEEK engineering plastic gear injection molding mold and method thereof have better effects. The fixing ring 2 is arranged on the top of the bottom plate 1, and an annular limiting groove 201 is opened inside the fixing ring 2 based on the shape of the fixing ring 2, and then the limiting block 202 is allowed to slide on the inner circumferential wall of the annular limiting groove 201, so that the sleeve 203 is fixed to the limiting block 202, and the direction of the sleeve 203 is changed. Then, the connecting rod 205 is allowed to slide based on the sleeve 203 through the cavity 204 opened in the sleeve 203, and the end of the connecting rod 205 is fixed to the shaping alloy belt 5, so that the shaping alloy belt 5 can be indirectly connected to the fixing ring 2, and the two can be connected. The distance can be freely changed, and in the process of change, the height of the limit block 202 is limited by the annular limit groove 201, so that the shaped alloy belt 5 is always in a fixed state based on the height of the fixing ring 2, and then the shaped alloy belt 5 can be limited. Then, based on this, the auxiliary upgrade block 402 makes corresponding adjustments to the shaped alloy belt 5 after moving up and down, and the curvature change during the adjustment of the shaped alloy belt 5 can make the connecting rod, sleeve 203 and limit block 202 freely change direction under the action of the annular limit groove 201, and because one end of the annular limit groove 201 is provided with an opening, the shaped alloy belt 5 can be detached from the opening after the length of the shaped alloy belt 5 exceeds the circumference of the gear to be shaped, so as to ensure the normal adjustment effect of the shaped alloy belt 5.

[0049] When the mold is in use, the lifting block 402 is set on the top of the top plate 4 through the hydraulic rod 401, and after the length of the hydraulic rod 401 changes, the height of the lifting block 402 can be changed, and then a limiting slide groove 501 is opened in the shaping alloy belt 5 to allow the slider 502 to slide in the limiting slide groove 501, and because the diameter of the slider 502 is larger than the inner diameter of the opening of the limiting slide groove 501, the slider 502 cannot be separated from the limiting slide groove 501, thereby making the height of the slider 502 unchanged based on the shaping alloy belt 5, and then the linkage rod 504 is respectively hingedly connected to the connecting shaft 503 and the lifting block 402, so that the crossing angle between the linkage rod 504 and the two can be driven according to the height change of the lifting block 402. The sliders 502 are changed synchronously, so that the spacing between the multiple sliders 502 is changed and matched with the gear size to be formed. Based on the change in the spacing between the multiple sliders 502, the circumference of the shaped alloy strip 5 wrapped around the outer peripheral wall of the gear to be formed is changed accordingly. Then, the sliders 502 are allowed to slide in the limiting slide groove 501 as the circumference of the shaped alloy strip 5 changes, so that it does not affect the change in the circumference of the shaped alloy strip 5. Therefore, after the sliders 502 are reversed to limit the shaped alloy strip 5, the inner diameter of the shaped alloy strip 5 can be controlled by controlling the height of the lifting block 402 to change, so that it is matched with the gear size to be formed, and then the range of gear sizes that can be formed by the mold is wider, thereby making the molding effect of the mold more practical.

[0050] When the mold is in use, the fixed block 6 is fixed to one end of the shaping alloy strip 5, and the inner cavity 601 is opened in the fixed block 6 so that the T-bar 602 can slide in the inner cavity 601, and then the end of the T-bar 602 is fixed to the pull rod 604, and the pull rod 604 is connected to the fixed block 6 by a tension spring 603, so that the fixed block 6 has a pulling force on the pull rod 604, thereby reducing the distance between the pull rod 604 and the fixed block 6, and a rotatable roller 605 is set at the bottom of the pull rod 604, and the protruding shaping alloy strip 5 passes between the pull rod 604 and the fixed block 6, and is fitted with the shaping alloy strip 5 by the roller 605, so that the protruding part of the shaping alloy strip 5 can be tightly fitted with its end under the extrusion effect of the roller 605 on the shaping alloy strip 5, thereby reducing the gap between the two, and the rotatable effect of the roller 605 does not affect the inner diameter adjustment of the shaping alloy strip 5.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A PEEK engineering plastic gear injection molding mold, characterized by: The invention comprises a bottom plate (1), wherein a fixing ring (2) is fixedly connected to the top of the bottom plate (1), an annular limiting groove (201) is provided in the fixing ring (2), a plurality of limiting blocks (202) are slidably connected to the inner peripheral wall of the annular limiting groove (201), a sleeve (203) is fixedly connected to one side of the plurality of limiting blocks (202), a cavity (204) is provided in the sleeve (203), a connecting rod (205) is slidably connected to the cavity (204), a shaping alloy belt (5) is fixedly connected to the end of the connecting rod (205), a limiting sliding groove (501) is provided in the shaping alloy belt (5), and a plurality of sliding blocks (502) are symmetrically arranged on the inner peripheral wall of the limiting sliding groove (501). ), a plurality of the sliders (502) are slidably connected to the shaped alloy strip (5) through the limiting sliding groove (501); a fixed block (6) is fixedly connected to the top of one end of the shaped alloy strip (5), an inner cavity (601) is provided in the fixed block (6), a T-shaped rod (602) is slidably connected to the inner peripheral wall of the inner cavity (601), a pull rod (604) is fixedly connected to the end of the T-shaped rod (602), a tension spring (603) is sleevedly connected to the outer peripheral wall of the T-shaped rod (602), and both ends of the tension spring (603) are respectively fixedly connected to the fixed block (6), i.e., the pull rod (604); the bottom of the pull rod (604) is rotatably connected to two rollers (605).

2. A PEEK engineering plastic gear injection molding mold according to claim 1, characterized in that: A bracket (3) is fixedly connected to the top of the fixing ring (2).

3. A PEEK engineering plastic gear injection molding mold according to claim 2, characterized in that: The end of the bracket (3) is fixedly connected to a top plate (4).

4. A PEEK engineering plastic gear injection molding mold according to claim 3, characterized in that: The bottom of the top plate (4) is fixedly connected to a hydraulic rod (401), and the end of the hydraulic rod (401) is fixedly connected to a lifting block (402).

5. A PEEK engineering plastic gear injection molding mold according to claim 4, characterized in that: The tops of the plurality of sliding blocks (502) are all fixedly connected to a connecting shaft (503).

6. A PEEK engineering plastic gear injection molding mold according to claim 5, characterized in that: The tops of the plurality of connecting shafts (503) are hingedly connected to linkage rods (504), and the ends of the plurality of linkage rods (504) are hingedly connected to the lifting block (402).

7. A method for using the PEEK engineering plastic gear injection molding mold according to claim 1, characterized in that: The following steps are involved: Step S1, connection: after fixing a plurality of connecting rods (205) to the outer peripheral wall of the shaped alloy strip (5), the connecting rods (205) are connected to the sleeve (203), and the connecting rods (205) are allowed to slide under the action of the sleeve (203) so that the two form a retractable state, thereby making the distance between the shaped alloy strip (5) and the fixing ring (2) in a variable state; Step S2, limiting: the annular limiting groove (201) and the limiting block (202) cooperate to indirectly limit the shaped alloy strip (5), so that the shaped alloy strip (5) is always at a corresponding height based on the fixing ring (2); Step S3, adjustment: based on the fact that the height of the shaped alloy strip (5) remains unchanged, the height of the lifting block (402) is changed, and then the crossing angles of the linkage rod (504) with the lifting block (402) and the connecting shaft (503) are controlled to change, so that the spacing between the plurality of sliders (502) can be adjusted and matched with the size of the gear to be injected by the user, so that after the plurality of sliders (502) limit the shaped alloy strip (5), the inner diameter of the shaped alloy strip (5) is matched with the diameter of the gear to be injected; Step S4, seam filling: Finally, after the adjustment is completed, the length of the shaped alloy strip (5) is greater than the circumference after shaping due to the change in the inner diameter of the shaped alloy strip (5). Then, the excess shaped alloy strip (5) can be fitted at its end and pulled outward. Then, the shaped alloy strip (5) is completely fitted to its end by a roller (605) with tension, so that the gap at the contact position between the two is reduced, thereby assisting the shaped alloy strip (5) in shaping the gear.

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