Injection mold with secondary ejection and anti-collision ejector pin

Abstract

The application relates to a secondary ejection and anti-collision ejector pin injection mold, belonging to the technical field of injection molds, which comprises a base, an ejector pin plate, a linkage and a supporting piece. The inside of the base is provided with a lifting area, the bottom end is provided with an ejection hole, and the top end is provided with a needle penetrating hole. The groove bottom of a mold groove is provided with a needle passing hole. The ejector pin plate is arranged in the lifting area, and the top end of the ejector pin plate is fixed with an ejector pin which extends into the needle penetrating hole and the needle passing hole and is used for ejecting an injection molding product. The lower end of the linkage is fixed on the ejector pin plate. Since the upper end of the linkage is detachably connected to the lower mold plate, the upper mold plate can be moved upwards while the ejector pin plate is pushed upwards by the ejector rod, so that the mold core is conveniently separated from the injection molding product. Then, the lower end of the supporting piece is fixed on the base. Since the upper end of the supporting piece is detachably connected to the lower mold plate, the connection between the upper mold plate and the linkage can be disconnected after the mold core is separated from the injection molding product, and the lower mold plate is connected and positioned by the supporting piece, so that the ejector pin which continues to rise can eject the injection molding product.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of injection mold, in particular to an injection mold with secondary ejection and anti-collision ejector pin. BACKGROUND

[0002] The injection mold is a tool for producing plastic products and a tool for giving plastic products complete structure and accurate size. Injection molding is a processing method used when mass producing some complex-shaped parts. Specifically, it refers to the process of injecting molten plastic into a mold cavity at high pressure by an injection molding machine, and then obtaining a shaped product after cooling and solidification.

[0003] At present, the traditional injection mold mainly consists of an upper mold plate, a lower mold plate, a mold core and an ejector pin. The bottom surface of the upper mold plate is provided with an upper mold groove. The lower mold plate is located below the upper mold plate, and the top surface of the lower mold plate is provided with a lower mold groove. The groove bottom of the lower mold groove is provided with a top hole. The mold core is placed in the lower groove. The ejector pin slides in the top hole and can push the mold core upward. In actual application, the upper mold plate is pressed against the lower mold plate, and the ejector pin is placed in the top hole to form an injection cavity between the ejector pin, the mold core, the upper mold groove and the lower mold groove. After the finished product is formed in the injection cavity, the ejector pin can be pushed upward to eject the mold core and the injection product. Although the above structure can realize the rapid ejection of the injection product, the injection product is not separated from the mold core and needs to be manually separated, which not only increases the labor intensity of the employees and reduces the injection efficiency, but also easily causes the injection product to be torn during demolding, affecting the demolding efficiency and effect of the injection product and causing the defective rate of the injection product to increase.

[0004] Therefore, how to design an injection mold with simple structure, convenient operation, no easy tearing and easy removal of injection products is a problem that needs to be solved by those skilled in the art. SUMMARY

[0005] The present application provides an injection mold with secondary ejection and anti-collision ejector pin, which solves the technical problems of the existing injection mold, such as difficult demolding, difficult removal and easy demolding tear.

[0006] The technical solution of the present application to solve the above technical problems is as follows: an injection mold with secondary ejection and anti-collision ejector pin, comprising a lower mold plate and an upper mold plate, the top surface of the lower mold plate is provided with a mold groove; the upper mold plate is placed on the lower mold plate and is provided with a pouring hole communicating with the mold groove; further comprising:

[0007] a base, the lower mold plate is placed on the base; the base is fixed with a mold core at the top end and is provided with a lifting area penetrating through both sides in the inside, the bottom end is provided with an ejection hole communicating with the lifting area, and the top end is provided with a needle hole communicating with the lifting area; the groove bottom of the mold groove is provided with a core hole and a needle hole communicating with the needle hole; the mold core extends into the mold groove through the core hole and defines an injection cavity between the mold core, the mold groove and the upper mold plate;

[0008] A ejector pin plate is arranged in the lifting area, and a ejector pin is fixed on the top end of the ejector pin plate and extends into the needle passing hole and the needle passing hole and is used for ejecting the injection molding product; a ejector rod is arranged in the ejecting hole and can push the ejector pin plate to move upward;

[0009] A linkage is arranged on the side wall of the ejector pin plate, and a support is arranged on the side wall of the base, and the upper end of the linkage and the upper end of the support are connected with the lower die plate to separate the mold core from the injection molding product and to position and support the lower die plate after the lower die plate is separated from the linkage.

[0010] The beneficial effects of the present application are: the structure of the traditional injection mold is improved, the lower end of the linkage is fixed on the ejector pin plate, the upper end of the linkage is detachably connected with the lower die plate, the upper die plate is moved upward while the ejector pin plate is pushed upward by the ejector rod, the mold core is easily removed from the injection cavity and separated from the injection product formed in the injection cavity; then the lower end of the support is fixed on the base, the upper end of the support is detachably connected with the lower die plate, the connection between the upper die plate and the linkage is released and the lower die plate is supported to no longer move upward or downward after the mold core is separated from the injection product, the ejector pin continues to move upward and passes through the needle passing hole to extend into the injection cavity to eject the injection product in the injection cavity, so that the mold core is separated from the injection product before the ejector pin ejects the injection product, the demolding efficiency and separation effect of the injection product are improved, and the yield of the injection product is improved.

[0011] On the basis of the above technical solutions, the present application can be further improved as follows.

[0012] Further, the base comprises a lower plate and an upper plate, the top end of the lower plate is provided with a lifting groove penetrating through both sides thereof; the upper plate is arranged on the lower plate; the bottom end of the mold core is fixed on the top end of the upper plate; the lifting area is the lifting groove; the ejecting hole is arranged on the lower plate; the needle passing hole is arranged on the upper plate; and the lower die plate is arranged on the upper plate.

[0013] Further, the mold core comprises a first movable mold core block, a second movable mold core block and a fixed mold core block, the first movable mold core block is arranged in the mold groove and is provided with a containing groove at the bottom end thereof and an outlet hole in the side wall thereof, the second movable mold core block is arranged in the groove bottom of the mold groove and is arranged in the containing groove, the second movable mold core block is fixed with a protrusion on the side surface corresponding to the outlet hole and the side surface away from the outlet hole is provided with a first inclined surface arranged from top to bottom and inclined to the outlet hole, and the fixed mold core block is fixed at the top end of the base and extends into the containing groove through the core hole, the side surface of the fixed mold core block close to the first movable mold core block is provided with a second inclined surface arranged from bottom to top and inclined away from the outlet hole, and the second inclined surface is in sliding contact with the first inclined surface to drive the first movable mold core block and the second movable mold core block to move downward with the lower mold plate to make the protrusion extend out of the outlet hole and be arranged above the through needle hole.

[0014] The further beneficial effect of the above is that the first movable mold core block and the second movable mold core block are driven by the lower mold plate, the first inclined surface of the second movable mold core block is in sliding contact with the second inclined surface of the fixed mold core block, the protrusion of the fixed mold core block can retract into the opening when the first movable mold core block and the second movable mold core block move upward, and the protrusion of the opening is arranged above the through needle hole and the ejector plate and the ejector pin move synchronously with the lower mold plate, so that the collision between the ejector pin and the protrusion can be avoided.

[0015] 1. Further, the linkage comprises two linkage strips and two clamping blocks, the two linkage strips are arranged along the vertical direction of the base and the lower ends thereof are fixed on the two sides of the ejector plate respectively, and the upper ends of the two linkage strips are provided with clamping grooves; the two sides of the lower mold plate are provided with first grooves, and the two first grooves are arranged opposite to the two linkage strips respectively; the two clamping blocks are elastically connected to the groove bottoms of the two first grooves through springs respectively and can extend into the corresponding clamping grooves to realize the detachable connection between the linkage strips and the upper mold plate.

[0016] The further beneficial effect of the above is that the two clamping blocks are elastically connected to the groove bottoms of the two first grooves on the two sides of the upper mold plate through springs, and the detachable connection between the linkage strips and the upper mold plate can be realized when the clamping blocks extend into or exit the corresponding clamping grooves.

[0017] Further, the two sides of the upper mold plate are provided with mounting grooves, the two mounting grooves are arranged opposite to the two linkage strips respectively, and the two clamping blocks are elastically connected to the groove bottoms of the two mounting grooves through springs and can extend into the corresponding mounting grooves to be lapped on the top ends of the corresponding linkage strips.

[0018] Further, the support comprises two support strips and two support blocks, the two support strips are arranged along the vertical direction of the base and the lower ends of the two support strips are fixed on the two sides of the base respectively; the two sides of the lower mold plate are provided with second grooves, the two second grooves are arranged opposite to the two support strips respectively; the two support blocks are elastically connected in the groove bottoms of the two second grooves through springs respectively and can be extended to overlap the top ends of the corresponding support strips to realize the detachable connection between the support strips and the upper mold plate.

[0019] The further beneficial effect of the above is that the support blocks are overlapped on the top ends of the corresponding support strips after the clamping blocks are withdrawn from the clamping grooves, which is convenient for preventing the upper mold plate from falling and for continuing to move the ejector pin to eject the injection molding product in the injection molding cavity.

[0020] Further, the support comprises two support strips and two support blocks, the two support strips are arranged along the vertical direction of the base and the lower ends of the two support strips are fixed on the two sides of the base respectively; the two sides of the lower mold plate are provided with second grooves, the two second grooves are arranged opposite to the two support strips respectively; the two support blocks are elastically connected in the groove bottoms of the two second grooves through springs respectively and can be extended to overlap the top ends of the corresponding support strips to realize the detachable connection between the support strips and the upper mold plate.

[0021] The further beneficial effect of the above is that the two reset strips are in contact with the two support blocks, and the two limiting blocks can be overlapped on the top ends of the two linkage strips, so that the support blocks can be withdrawn into the second grooves before the upper mold plate and the lower mold plate are closed.

[0022] Further, the support comprises two support strips and two support blocks, the two support strips are arranged along the vertical direction of the base and the lower ends of the two support strips are fixed on the two sides of the base respectively; the two sides of the lower mold plate are provided with second grooves, the two second grooves are arranged opposite to the two support strips respectively; the two support blocks are elastically connected in the groove bottoms of the two second grooves through springs respectively and can be extended to overlap the top ends of the corresponding support strips to realize the detachable connection between the support strips and the upper mold plate.

[0023] Further, the support comprises two support strips and two support blocks, the two support strips are arranged along the vertical direction of the base and the lower ends of the two support strips are fixed on the two sides of the base respectively; the two sides of the lower mold plate are provided with second grooves, the two second grooves are arranged opposite to the two support strips respectively; the two support blocks are elastically connected in the groove bottoms of the two second grooves through springs respectively and can be extended to overlap the top ends of the corresponding support strips to realize the detachable connection between the support strips and the upper mold plate.

[0024] Further, the axis of the fixing column and the axis of the fixing hole are arranged at a preset angle with the vertical line of the base. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 This is a three-dimensional structural diagram of an injection mold with secondary ejection and anti-collision ejector pins according to the present invention.

[0026] Figure 2 This is a side view of the injection mold for secondary ejection and anti-collision ejector pins according to the present invention.

[0027] Figure 3 This is a top view of the injection mold for a secondary ejection and anti-collision ejector pin according to the present invention.

[0028] Figure 4 for Figure 3 A schematic cross-sectional view of the mold-fitting structure at point AA;

[0029] Figure 5 for Figure 3 A schematic cross-sectional view of the mold opening at point AA;

[0030] Figure 6 for Figure 3 A schematic diagram of the cross-sectional structure of the single ejection at point AA;

[0031] Figure 7 for Figure 3 Schematic diagram of the cross-sectional structure of the secondary ejection at point AA;

[0032] Figure 8 for Figure 3 A cross-sectional structural diagram of the mold closing action at point AA;

[0033] Figure 9 for Figure 3 A schematic diagram of the cross-sectional structure of the second action of the mold-making process at point AA;

[0034] Figure 10 for Figure 3 A schematic diagram of the cross-sectional structure of the third action of the AA-section mold-making process;

[0035] Figure 11 for Figure 3 A cross-sectional structural diagram of the completed molding action at point AA.

[0036] The attached diagram lists the components represented by each number as follows:

[0037] 1, lower die plate, 11, mold groove, 12, core hole, 13, through needle hole, 14, first groove, 15, second groove, 2, upper die plate, 21, pouring hole, 22, mounting groove, 3, base, 31, ejection hole, 32, needle hole, 33, lower plate, 331, lifting groove, 34, upper plate, 4, ejector pin plate, 5, linkage, 51, linkage strip, 511, clamping groove, 52, clamping block, 6, support, 61, support strip, 62, support block, 7, mold core, 71, first movable mold core block, 711, containing groove, 72, second movable mold core block, 73, fixed mold core block, 74, protruding block, 8, ejector pin, 9, ejector rod, 10, injection molded product, 16, limiting block, 17, reset strip, 18, core pulling, 19, fixed column. DETAILED DESCRIPTION

[0038] The principles and features of the present application are described below in conjunction with the accompanying drawings, which are only used to explain the present application and are not intended to limit the scope of the present application.

[0039] As shown in Figure 1 and Figure 4 , an injection mold with secondary ejection and anti-collision ejector pin includes a lower die plate 1 and an upper die plate 2, the top surface of the lower die plate 1 is provided with a mold groove 11; the upper die plate 2 is placed on the lower die plate 1 and is provided with a pouring hole 21 communicating with the mold groove 11; further comprising: a base 3, an ejector pin plate 4, a linkage 5 and a support 6,

[0040] The lower die plate 1 is placed on the base 3; the base 3 is fixed with a mold core 7 at the top end and is provided with a lifting area penetrating through both sides in the inside, a ejection hole 31 communicating with the lifting area at the bottom end, and a needle hole 32 communicating with the lifting area at the top end; the groove bottom of the mold groove 11 is provided with a core hole 12 and a through needle hole 13 arranged opposite to the needle hole 32; the mold core 7 extends into the mold groove 11 through the core hole 12 and defines an injection cavity between the mold core 7, the mold groove 11 and the upper die plate 2; the ejector pin plate 4 is placed in the lifting area, and the top end of the ejector pin plate 4 is fixed with an ejector pin 8 extending into the needle hole 32 and the through needle hole 13 and used for ejecting the injection molded product; the ejection hole 31 is slidably provided with an ejector rod 9 capable of pushing the ejector pin plate 4 to move upward; the linkage 5 and the support 6, the lower end of the linkage 5 is fixed on the side wall of the ejector pin plate 4, the lower end of the support 6 is fixed on the side wall of the base 3, the upper end of the linkage 5 and the upper end of the support 6 are switchably connected with the lower die plate 1, so that the mold core 7 is separated from the injection molded product 10, and after the lower die plate 1 is disconnected from the linkage 5, the lower die plate 1 is connected and positioned.

[0041] As shown in Figure 1 and Figure 2As shown, in some specific embodiments, the base 3 may include a lower plate 33 and an upper plate 34. The top of the lower plate 33 is provided with a lifting groove 331 that runs through both sides of it; the upper plate 34 is placed on the lower plate 33; the bottom end of the mold core 7 is fixed to the top of the upper plate 34; the lifting area is the lifting groove 331; the ejection hole 31 is provided on the lower plate 33; the needle hole 32 is provided on the upper plate 34; and the lower template 1 is placed on the upper plate 34.

[0042] like Figure 7 and Figure 8 As shown, in some specific embodiments, the mold core 7 may include a first movable mold core block 71, a second movable mold core block 72, and a fixed mold core block 73. The first movable mold core block 71 is placed in the groove 11 and its bottom end is provided with a receiving groove 711 opposite to the core hole 12. Its side wall is provided with an outlet hole communicating with the receiving groove 711. The second movable mold core block 72 is placed at the bottom of the groove 11 and located in the receiving groove 711. The side of the second movable mold core block 72 corresponding to the outlet hole is fixed with a protrusion 74, and its side away from the outlet hole is arranged sequentially from top to bottom. The first inclined surface is arranged at an angle towards the outlet hole; the bottom end of the fixed mold core block 73 is fixed to the top end of the base 3 and extends through the core hole 12 into the receiving groove 711. The side of the fixed mold core block 73 near the first movable mold core block 71 is a second inclined surface arranged from bottom to top towards the direction away from the outlet hole. The second inclined surface slides in contact with the first inclined surface so that as the lower template 1 moves downward, the first movable mold core block 71 and the second movable mold core block 72 move downward in linkage, so that the protrusion 74 extends out of the outlet hole and is placed above the through needle hole 13.

[0043] like Figure 7 As shown, in some specific embodiments, the linkage 5 includes two linkage plates 51 and two locking blocks 52. The two linkage plates 51 are arranged along the vertical direction of the base 3 and their lower ends are respectively fixed to the two sides of the ejector plate 4. The upper ends of the two linkage plates 51 are provided with locking grooves 511. The lower template 1 is provided with first grooves 14 on both sides. The two first grooves 14 are respectively arranged opposite to the two linkage plates 51. The two locking blocks 52 are elastically connected to the bottom of the two first grooves 14 by springs and can extend out of the corresponding first grooves 14 and into the corresponding locking grooves 511 to realize the detachable connection between the linkage plates 51 and the upper template 2.

[0044] like Figure 5 As shown, in some specific embodiments, it may also include two limiting blocks 16. The upper template 2 has mounting grooves 22 on both sides. The two mounting grooves 22 are respectively arranged opposite to the two linkage plates 51. The two limiting blocks 16 are elastically connected to the bottom of the two mounting grooves 22 by springs and can extend out of the corresponding mounting grooves 22 to overlap the top of the corresponding linkage plates 51.

[0045] like Figure 6As shown in the drawings, in some specific embodiments, the support 6 can include two support strips 61 and two support blocks 62, the two support strips 61 are arranged along the vertical direction of the base 3 and the lower ends thereof are fixed on the two sides of the base 3 respectively; the two sides of the lower mold plate 1 are provided with two second grooves 15, the two second grooves 15 are arranged opposite to the two support strips 61 respectively; the two support blocks 62 are elastically connected in the groove bottoms of the two second grooves 15 through springs and can extend out of the corresponding second grooves 15 to lap the top ends of the corresponding support strips 61 to realize the detachable connection between the support strips 61 and the upper mold plate 2.

[0046] As shown in the drawings, Figure 1 and Figure 4 As shown in the drawings, in some specific embodiments, two reset strips 17 can also be included, the two reset strips 17 are arranged along the vertical direction of the base 3 and the upper ends thereof are fixed on the two sides of the upper mold plate 2 respectively, the two reset strips 17 are arranged opposite to the two support strips 61 respectively and the side faces thereof close to the upper mold plate 2 are provided with accommodating grooves; the two support strips 61 can extend into the two accommodating grooves respectively; the reset strips 17 on the two sides of the corresponding accommodating grooves can contact the corresponding support blocks 62 to push the support blocks 62 into the second grooves 15.

[0047] As shown in the drawings, Figure 5 and Figure 6 As shown in the drawings, in some specific embodiments, a core pulling 18 is also included, the top surface of the lower mold plate 1 is provided with a sliding groove which penetrates the type groove 11 and penetrates the side surface of the lower mold plate 1; the core pulling 18 slides in the sliding groove from the direction close to the type groove 11 to the direction away from the type groove 11; the injection cavity is the gap between the upper mold plate 2, the type groove 11, the mold core 7 and the core pulling 18.

[0048] As shown in the drawings, Figure 4 and Figure 5 As shown in the drawings, in some specific embodiments, a fixed column 19 is also included, the core pulling 18 is provided with a fixed hole which penetrates the two ends thereof; the top end of the upper mold plate 2 is provided with a fixed groove which can communicate with the core pulling 18 opposite; the top end of the fixed column 19 is fixed on the bottom end of the upper mold plate 2 and the same can pass through the fixed hole and be fixed in the fixed groove.

[0049] Specifically, the axis of the fixed column 19 and the axis of the fixed hole are arranged at a preset angle with the vertical line of the base 3.

[0050] The above is only the preferred embodiment of the present application and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A secondary ejection and anti-collision ejector pin injection mold, comprising a lower mold plate (1) and an upper mold plate (2), a mold cavity (11) is arranged on the top surface of the lower mold plate (1); the upper mold plate (2) is arranged on the lower mold plate (1) and is provided with a pouring hole (21) in communication with the mold cavity (11); characterized in that, Also include: Base (3), the lower die plate (1) is placed on the base (3); The top end of the base (3) is fixed with a mold core (7), and the inside is provided with a lifting area penetrating on both sides, the bottom end is provided with an ejection hole (31) communicating with the lifting area, and the top end is provided with a needle hole (32) communicating with the lifting area; The groove bottom of the mold groove (11) is provided with a core hole (12) and a needle hole (13) arranged opposite to the needle hole (32); The mold core (7) extends into the mold groove (11) through the core hole (12) and defines an injection cavity between the mold core (7), the mold groove (11) and the upper die plate (2); The ejector rod (9) in the ejector hole (31) slides to push the ejector plate (4) to move upward; Linkage (5) and support (6), the lower end of the linkage (5) is fixed on the side wall of the ejector plate (4), the lower end of the support (6) is fixed on the side wall of the base (3), and the upper end of the linkage (5) and the upper end of the support (6) can be converted to connect with the lower die plate (1), so that the mold core (7) is separated from the injection product (10), and after the lower die plate (1) is disconnected with the linkage (5), the lower die plate (1) is positioned and supported; The mold core (7) includes a first movable mold core block (71), a second movable mold core block (72) and a fixed mold core block (73), the first movable mold core block (71) is placed in the mold groove (11) and the bottom end is provided with a containing groove (711) opposite to the core hole (12), and the side wall is provided with an outlet hole communicating with the containing groove (711); The second movable mold core block (72) is placed in the groove bottom of the mold groove (11) and located in the containing groove (711), the second movable mold core block (72) is fixed with a protrusion (74) corresponding to the side of the outlet hole, and the side away from the outlet hole is arranged in a first inclined surface inclined to the direction close to the outlet hole from top to bottom; The bottom end of the fixed mold core block (73) is fixed on the top end of the base (3) and extends into the containing groove (711) through the core hole (12), the side close to the first movable mold core block (71) of the fixed mold core block (73) is arranged in a second inclined surface inclined to the direction away from the outlet hole from bottom to top, and the second inclined surface and the first inclined surface slide to contact to link the first movable mold core block (71) and the second movable mold core block (72) to move downward with the lower die plate (1) to move downward to make the protrusion (74) extend out of the outlet hole and be placed above the needle hole (13); The support (6) comprises two support strips (61) and two support blocks (62), the two support strips (61) are arranged along the vertical direction of the base (3) and the lower ends thereof are fixed on the two sides of the base (3) respectively; the lower die plate (1) is provided with two second grooves (15) on the two sides thereof, the two second grooves (15) are arranged opposite to the two support strips (61) respectively; the two support blocks (62) are elastically connected to the groove bottoms of the two second grooves (15) by springs respectively and can extend out of the corresponding second grooves (15) to lap the top ends of the corresponding support strips (61) to realize the detachable connection of the support strips (61) and the upper die plate (2).

2. The injection mold of claim 1, wherein, The base (3) comprises a lower plate (33) and an upper plate (34), the top end of the lower plate (33) is provided with a lifting groove (331) penetrating through the two sides thereof; the upper plate (34) is arranged on the lower plate (33); the bottom end of the mold core (7) is fixed to the top end of the upper plate (34); the lifting area is the lifting groove (331); the ejection hole (31) is arranged on the lower plate (33); the needle hole (32) is arranged on the upper plate (34); the lower die plate (1) is arranged on the upper plate (34).

3. The injection mold of claim 1, wherein, The linkage (5) comprises two linkage strips (51) and two clamping blocks (52), the two linkage strips (51) are arranged along the vertical direction of the base (3) and the lower ends thereof are fixed on the two sides of the ejector plate (4) respectively, and the upper ends of the two linkage strips (51) are provided with clamping grooves (511); the lower die plate (1) is provided with two first grooves (14) on the two sides thereof, the two first grooves (14) are arranged opposite to the two linkage strips (51) respectively; the two clamping blocks (52) are elastically connected to the groove bottoms of the two first grooves (14) by springs respectively and can extend out of the corresponding first grooves (14) to extend into the corresponding clamping grooves (511) to realize the detachable connection of the linkage strips (51) and the upper die plate (2).

4. The injection mold of claim 3, wherein, Two limiting blocks (16) are further included, the upper die plate (2) is provided with mounting grooves (22) on the two sides thereof, the two mounting grooves (22) are arranged opposite to the two linkage strips (51) respectively; the two limiting blocks (16) are elastically connected to the groove bottoms of the two mounting grooves (22) by springs respectively and can extend out of the corresponding mounting grooves (22) to lap the top ends of the corresponding linkage strips (51).

5. The injection mold of claim 1, wherein, Two reset strips (17) are further included, both of which are arranged along the vertical direction of the base (3) and have upper ends fixed on both sides of the upper mold plate (2) respectively, and both of which are arranged opposite to the two support strips (61) and have a receiving groove on the side close to the upper mold plate (2).

6. The injection mold of claim 1, wherein, A core pulling (18) is further included, and the top surface of the lower mold plate (1) is provided with a sliding groove penetrating the mold groove (11), and the sliding groove penetrates the side surface of the lower mold plate (1); the core pulling (18) slides in the sliding groove from the direction close to the mold groove (11) to the direction away from the mold groove (11); and the injection cavity is the gap between the upper mold plate (2), the mold groove (11), the mold core (7) and the core pulling (18).

7. The injection mold of claim 6, wherein, A fixing column (19) is further included, and the core pulling (18) is provided with a fixing hole penetrating both ends thereof; the top end of the upper mold plate (2) is provided with a fixing groove in communication with the core pulling (18) opposite; and the top end of the fixing column (19) is fixed at the bottom end of the upper mold plate (2) and can pass through the fixing hole and be fixed in the fixing groove.

8. The injection mold of claim 7, wherein, The axis of the fixing column (19) and the axis of the fixing hole are both arranged at a preset included angle with the vertical line of the base (3).

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