Brake handle injection molding device

Abstract

The invention discloses a brake handle injection molding device, and relates to the technical field of injection molding, the brake handle injection molding device comprises a workbench, the workbench is provided with an injection device, a mold closing mechanism and a mold, the mold comprises a fixed mold and two symmetrical movable molds, and the mold closing mechanism is used for driving the movable molds to be close to or away from the fixed mold in the first direction; the fixed mold and the two movable molds are assembled to form a handle-shaped cavity, parting positions of the fixed mold and the two movable molds are respectively a first parting position and a second parting position, the first parting position and the second parting position are respectively the middle parts of two ends of a rotating handle of the handle-shaped cavity, and mold cores are arranged on the two movable molds and are used for forming a shaft hole at the rotating handle; according to the brake handle injection molding device, the parting positions are arranged in the middles of the two ends of the rotating handle through the forming mold, so that the hollow part is directly formed in the cavity, an existing secondary machining process is avoided, time consumed in the working procedure is reduced, one-time forming of the brake handle is achieved, and the production efficiency is remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, and in particular to an injection molding device for a brake handle. Background Art

[0002] Brake handles are generally made by injection molding, where molten plastic is injected into a mold for molding. Due to the need for a certain draft angle, some handles cannot be molded in one go and often require further processing, such as Figure 10 The brake handle shown in the figure requires a hollow portion 102 at the handle 101. Conventional methods generally use the handle's symmetrical surface as the parting surface 104 for integral injection molding, and then further process the handle to make it hollow. This is mainly due to the difficulty in demolding the hollow portion of the handle and the lack of a good draft angle. This step-by-step processing method is inefficient, and the material cut from the required hollow portion during the processing is difficult to directly utilize, resulting in high production costs. Summary of the Invention

[0003] The object of the present invention is to provide a brake handle injection molding device to solve the above-mentioned deficiencies in the prior art.

[0004] In order to achieve the above-mentioned objectives, the present invention provides the following technical solutions: A brake handle injection molding device, comprising a workbench, on which an injection device, a clamping mechanism and a mold are arranged, the mold comprising a fixed mold and two symmetrical movable molds, the clamping mechanism is used to drive the movable mold to approach or move away from the fixed mold along a first direction, and a handle-shaped cavity is formed after the fixed mold and the two movable molds are clamped, and the parting positions of the fixed mold and the two movable molds are respectively a first parting position and a second parting position, wherein the first parting position and the second parting position are respectively the middle parts of the two ends of the turning handle of the handle-shaped cavity, and both movable molds are provided with a core for forming the axial hole at the turning handle.

[0005] Furthermore, the core is connected to a core-pulling mechanism, and the core-pulling mechanism is used to drive the core to move along its own axial direction.

[0006] Furthermore, an external auxiliary mechanism is also provided on the movable mold, and the external auxiliary mechanism includes an external stopper, one end of the external stopper is fixedly connected to an external auxiliary rod, the core surface is slidably connected to the outer stopper and the inner wall of the outer auxiliary rod, the other end of the outer auxiliary rod is connected to the external driving member, the outer auxiliary rod is slidably connected to the inner wall of the movable mold, and a first accommodating cavity adapted to the outer stopper is opened in the cavity in the movable mold.

[0007] Furthermore, the external driving member is used to drive the external auxiliary rod to move along the first direction to drive the external stopper to move. When the mold is opened, the external stopper abuts against the surface of the molded product.

[0008] Furthermore, the fixed mold is provided with an internal auxiliary mechanism at a position opposite to the core, and the internal auxiliary mechanism includes two internal push blocks, which are symmetrically arranged on both sides of the fixed mold, and the internal push blocks are slidingly connected to the inner wall of the fixed mold. A circular hole for the end of the core to enter is provided on one side of the internal push block, and a second accommodating cavity adapted to the internal push block is provided on the fixed mold.

[0009] Furthermore, the inner auxiliary mechanism further comprises an elastic member, the elastic force of the elastic member acts on the inner push block to cause it to have a tendency to move toward the fixed mold.

[0010] Furthermore, the elastic member includes two "U"-shaped spring pieces, and two slots are provided on the ends of the two inner push blocks close to each other, and the two slots on the same side abut against the two ends of the same spring piece.

[0011] Furthermore, the inner walls of the circular holes of the two inner push blocks are provided with guide bars, which are parallel to the axial direction of the circular holes. The guide bars of the two inner push blocks are staggered, and the ends of the two cores are respectively provided with sliding grooves adapted to the guide bars.

[0012] Furthermore, a pushing mechanism is provided at the bottom of the fixed mold, and the pushing mechanism includes at least two push rods, which are arranged in a vertical direction and are slidably connected to the inner wall of the fixed mold.

[0013] Furthermore, the first parting position and the second parting position each have three parting surfaces, namely parting surface a, parting surface b and parting surface c.

[0014] Compared with the prior art, the brake handle injection molding device provided by the present invention has the following beneficial effects:

[0015] The brake handle injection molding device uses a mold to set the parting position in the middle of the two ends of the handle (the first parting position and the second parting position), so that the hollow part is directly molded in the mold cavity, avoiding the existing secondary processing process, reducing process time, and realizing one-step molding of the brake handle, which significantly improves production efficiency.

[0016] In addition, the one-step injection molding method does not require cutting of hollow parts, which avoids secondary material loss, improves raw material utilization, and reduces post-processing equipment investment and labor costs.

[0017] Through the axial coordination between the core and the core-pulling mechanism, the external auxiliary mechanism (the external stopper abuts the product surface) and the internal auxiliary mechanism (the elastic member pushes the internal push block to separate the adhesion surface), the demoulding resistance is effectively reduced, the deformation risk at the handle is reduced, and the product qualification rate is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of a partial structure of an injection molding device for a brake handle according to an embodiment of the present invention;

[0020] Figure 2 The embodiment of the present invention provides Figure 1 Structural diagram of the two movable molds in the mold opening state;

[0021] Figure 3 The embodiment of the present invention provides Figure 2 A schematic diagram of a partial structure of a front view;

[0022] Figure 4 A schematic diagram of the structure of an external auxiliary mechanism provided in an embodiment of the present invention;

[0023] Figure 5 A schematic diagram of the working state of the external auxiliary mechanism provided by an embodiment of the present invention;

[0024] Figure 6 A schematic diagram of a local structure when an internal auxiliary mechanism is provided in an embodiment of the present invention;

[0025] Figure 7 A schematic diagram of the working state of the internal auxiliary mechanism provided by an embodiment of the present invention;

[0026] Figure 8 A schematic diagram of a partial longitudinal cross-section of the fixed mold provided by an embodiment of the present invention;

[0027] Figure 9 A schematic diagram of the structure of the handle during demoulding provided by an embodiment of the present invention;

[0028] Figure 10 A schematic diagram of a handle provided by an embodiment of the present invention undergoing secondary processing.

[0029] Description of reference numerals:

[0030] 1. Workbench; 2. Injection device; 3. Clamping mechanism; 4. Mold; 41. Fixed mold; 42. Moving mold; 43. First direction; 44. Cavity; 45. Core; 46. Parting surface a; 47. Parting surface b; 48. Parting surface c; 5. Core-pulling mechanism; 51. Positioning hole; 6. External auxiliary mechanism; 61. External stopper; 62. External auxiliary rod; 63. External driving member; 64. First accommodating cavity; 7. Internal auxiliary mechanism; 71. Internal push block; 72. Circular hole; 73. Second accommodating cavity; 74. Elastic member; 75. Slot; 76. Guide strip; 77. Slide; 78. Spacing a; 8. Ejector rod;

[0031] 100. Handle; 101. Turning handle; 102. Hollow part; 103. Axis hole; 104. Third parting position. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solution of the present invention, the products to be processed and the existing technology are described in detail. Figure 10 The figure shows the brake handle 100 structure to be molded. The handle 101 has a hollow portion 102, and the handle 101 has an axial hole 103 for connecting to the main part of the brake structure. The existing injection molding method generally ignores the molding of the hollow portion 102, but instead molds the following: Figure 10 The intermediate product shown in the figure is then further cut to form the required hollow portion 102. This is mainly due to the space requirements for the cavity 44 and the difficulty of demolding. Generally, the parting position of the mold 4 is located on the symmetry plane of the product or parallel to the symmetry plane. If it is not necessary to form the complete handle 100 in one injection molding (i.e., the hollow portion 102 is subjected to secondary processing), then it is only necessary to set the third parting position 104 on the symmetry plane of the handle 100 (see FIG. Figure 10 ), and the purpose of the present application is to provide a one-step molding method for the handle 100. If the parting position is still at the third parting position 104, the product cannot be removed from the movable mold 42 or the fixed mold 41 (blocked by the middle part). Even if the parting position is changed, the connection between the hollow part 102 and the mold 4 (the position for forming the hollow part 102) does not have a good draft angle, and is affected by the adhesion force, making it difficult to initially separate it.

[0033] The following will be combined with the Figures 1-9The present invention is further introduced in detail. The brake handle injection molding device includes a workbench 1, on which an injection device 2, a clamping mechanism 3 and a mold 4 are provided. The feature is that the mold 4 includes a fixed mold 41 and two symmetrical movable molds 42, and the clamping mechanism 3 is used to drive the movable mold 42 to approach or move away from the fixed mold 41 along a first direction 43. After the fixed mold 41 and the two movable molds 42 are clamped, a handle 100-shaped cavity 44 is formed. The parting positions of the fixed mold 41 and the two movable molds 42 are respectively a first parting position and a second parting position, wherein the first parting position and the second parting position are respectively the middle parts of the two ends of the rotating handle 101 of the handle 100-shaped cavity 44, and both movable molds 42 are provided with a core 45 for forming the axial hole 103 at the rotating handle 101.

[0034] See Figure 1 and Figure 2 The fixed mold 41 is fixedly mounted on the workbench 1 in an inverted "T" shape, and the two movable molds 42 are located on both sides of the fixed mold 41. The two movable molds 42 move toward the fixed mold 41 to complete the mold closing and form the required cavity 44. When the two movable molds 42 move away from the fixed mold 41, the mold opening is completed. The moving direction of the movable mold 42 is the first direction 43. Both the movable mold 42 and the fixed mold 41 have at least a portion of the rotating handle 101. After the mold is opened, the molded product remains on the fixed mold 41. The product is taken out from the fixed mold 41 in an upward direction to form the required product at one time.

[0035] It should be noted that when the mold is opened, the two movable molds 42 can move away from the fixed mold 41 at the same time or leave the fixed mold 41 one after another. The method of leaving one after another can reduce the pulling force on the product when the mold is opened, and avoid deformation or damage of the product (especially the part of the rotating handle 101). For products with sufficient cooling degree or structural strength, the two movable molds 42 can also move at the same time. When the product is taken out of the fixed mold 41, the position where it encounters greater resistance is also at the rotating handle 101. The reason is that the adhesion force between the surface of the hollow part 102 and the surface of the fixed mold 41 is relatively large, and the initial separation is more difficult.

[0036] like Figure 3 As shown, the first parting position and the second parting position both have three parting surfaces, namely parting surface a46, parting surface b47 and parting surface c48, and the hollow part 102 is located below the parting surface b47. This is based on the setting method of the two parting positions, so that the parted product remains on the fixed mold 41 and can move upward to separate from the fixed mold 41.

[0037] In one embodiment of the present invention, the core 45 is connected to the core-pulling mechanism 5, which is used to drive the core 45 to move along its own axial direction. A positioning hole 51 is provided on the fixed mold 41 for the end of the core 45 to enter. It should be understood that since two movable molds 42 are provided, the core 45 is installed on both movable molds 42, and the positions corresponding to the ends of the two cores 45 are provided with positioning holes 51 on the fixed mold 41. In the mold closing state, the core 45 enters the positioning hole 51 and injection molding can be carried out. After injection molding, the core 45 is pulled out by the core-pulling mechanism 5, thereby forming the required axial holes 103 at both ends of the turning handle 101.

[0038] In one embodiment of the present invention, the core pulling mechanism 5 is a cylinder or a hydraulic cylinder or an electric telescopic rod, the cylinder body of the cylinder or the cylinder body of the hydraulic cylinder or the cylinder body of the electric telescopic rod is arranged along the first direction 43, and is installed on the workbench 1, the piston rod of the cylinder or the piston rod of the hydraulic cylinder or the telescopic rod of the electric telescopic rod is connected to one end of the core 45, and the core 45 is driven to move by the cylinder or the hydraulic cylinder or the electric telescopic rod, thereby realizing the forming of the shaft hole 103.

[0039] In one embodiment of the present invention, in order to facilitate the replacement of the core 45, the core 45 can be detachably installed at the end of the rod body, the surface of the rod body (not shown in the figure) is slidably connected to the inner wall of the movable mold 42, and the other end of the rod body is connected to the core-pulling mechanism 5. The sliding connection between the rod body and the movable mold 42 is sealed and slides to ensure that there is no leakage during the injection molding process. The length of the rod body matches the core 45, which is convenient for installation and disassembly. The sliding connection is made of wear-resistant material to reduce wear.

[0040] In one embodiment of the present invention, the mold clamping mechanism 3 is a general structure in the prior art for moving the movable mold 42 to complete mold clamping and mold opening. Its specific structure will not be described in detail here. The difference from the prior art is that the present invention is provided with two movable molds 42, and there are also two mold clamping mechanisms 3, which correspond to the movement of the two movable molds 42 respectively. It should be understood that the movement of the two movable molds 42 can be synchronous or asynchronous. During the injection molding process, the synchronous movement or asynchronous movement of the movable mold 42 can be adjusted according to the requirements of mold clamping and mold opening and the removal of the injection molded parts.

[0041] In one embodiment of the present invention, the structure of the injection device 2 can also adopt the existing technology, which is used to inject molten plastic into the formed cavity 44. The injection device 2 is connected to the cavity 44 through an injection port (not shown in the figure), and the injection port of the injection device 2 is set on the fixed mold 41.

[0042] In specific implementation: in the mold closing state (the core 45 moves to the corresponding position), the molten plastic is injected into the cavity 44 through the injection device 2. After cooling and molding, the core 45 is first driven by the core pulling mechanism 5 to axially withdraw from the positioning hole 51, and then the movable mold 42 moves synchronously or successively to realize the mold opening. After the mold opening, the injection molded part (brake handle 100) remains on the fixed mold 41. Figure 2 As shown, the injection molded part can be removed at last. It should be noted that, during the mold opening process, the movement of the two movable molds 42 is preferably a sequential movement. The reason is that the hollow part 102 formed at the turning handle 101 is stuck on the fixed mold 41, and the movement of the movable mold 42 cannot drive the injection molded part to move. However, when the adhesion between the movable mold 42 and the outer surface of the turning handle 101 is greater than the adhesion between the movable mold 42 and the inner surface of the turning handle 101, the movement of the movable mold 42 is likely to pull the turning handle 101, thereby causing possible deformation. The simultaneous movement of the two movable molds 42 is likely to further lead to an increase in the degree of deformation of the connection of the turning handle 101. Therefore, the sequential movement method can avoid the simultaneous deformation of both ends of the turning handle 101, thereby reducing the risk of large deformation of the turning handle 101.

[0043] In one embodiment of the present invention, an external auxiliary mechanism 6 is further provided on the movable mold 42, and the external auxiliary mechanism 6 includes an external stopper 61, one end of the external stopper 61 is fixedly connected to the external auxiliary rod 62, the surface of the core 45 (or the rod body) is slidably connected to the outer stopper 61 and the inner wall of the outer auxiliary rod 62, the other end of the outer auxiliary rod 62 is connected to the external driving member 63, and the outer auxiliary rod 62 is slidably connected to the inner wall of the movable mold 42, and a first accommodating cavity 64 adapted to the external stopper 61 is opened in the cavity 44 in the movable mold 42. When the external stopper 61 enters the first accommodating cavity 64, its end plane is flush with the surface of the cavity 44, so as not to interfere with the product molding. It should be understood that the external stopper 61 is located within the range of the surface where the cavity 44 is located;

[0044] In one embodiment of the present invention, the outer driving member 63 is used to drive the outer auxiliary rod 62 to move along the first direction 43 to drive the outer stopper 61 to move. When the mold is opened, the outer stopper 61 abuts against the surface of the molded product;

[0045] like Figure 5 As shown, the function of the outer stop block 61 is to prevent the injection molded part from being pulled and deformed due to excessive adhesion during the mold opening process. Specifically, the outer stop block 61 remains in the current position when the mold is opened, and the external driving member 63 can also provide the outer stop block 61 with a force that presses against the surface of the molded product (the outer side of the turning handle 101), thereby avoiding the turning handle 101 from being subjected to a large outward pulling force when the movable mold 42 moves or the core 45 is pulled out. Through the action of the two outer stop blocks 61, the injection molded part remains stable during the mold opening process, reducing the risk of deformation.

[0046] The setting of the outer stop block 61 also provides another way to open the mold, that is, the movable mold 42 moves but the core 45 and the outer stop block 61 remain stationary. When the movable mold 42 moves, the contact part of the injection molded part and the upper part of the cavity 44 of the movable mold 42 are separated. At this time, the two movable molds 42 can move synchronously, and then the outer stop block 61 remains stationary, and the core 45 is pulled out. During the process of pulling out the core 45, the outer stop block 61 always presses against the injection molded part to avoid excessive pulling force at the core 45 causing deformation of the turning handle 101. After the two cores 45 are pulled out, the two outer stop blocks 61 are driven to move in opposite directions away from the injection molded part, thereby realizing the separation of the injection molded part from the two movable molds 42, and no additional pulling will be caused to the injection molded part during the separation process, thereby ensuring its integrity and precision, and improving production efficiency and product quality.

[0047] In one embodiment of the present invention, the fixed mold 41 is provided with an internal auxiliary mechanism 7 at a position opposite to the core 45. The internal auxiliary mechanism 7 includes two internal push blocks 71. The two internal push blocks 71 are symmetrically arranged on both sides of the fixed mold 41, and the internal push blocks 71 are slidably connected to the inner wall of the fixed mold 41. A circular hole 72 (equivalent to the positioning hole 51) for the end of the core 45 to enter is opened on one side of the internal push block 71. A second accommodating cavity 73 adapted to the internal push block 71 is opened on the fixed mold 41. When the internal push block 71 enters the second accommodating cavity 73, its end plane is flush with the surface of the fixed mold 41, thereby not interfering with the molding of the product.

[0048] In one embodiment of the present invention, the internal auxiliary mechanism 7 further includes an elastic member 74. The elastic force of the elastic member 74 acts on the inner push block 71 to make it have a tendency to move toward the fixed mold 41. As shown in the figure, in this embodiment, two "U"-shaped spring pieces are used to act on the two inner push blocks 71 at the same time. Specifically, two inner push blocks 71 are provided with two card slots 75 at one end close to each other. The two card slots 75 on the same side abut against the two ends of the same spring piece, and the two card slots 75 on the other side are connected by another spring piece. The middle part of the spring piece is fixedly installed in the fixed mold 41. The two spring pieces work together to make the two inner push blocks 71 always have a tendency to move toward the fixed mold 41.

[0049] Furthermore, the inner walls of the circular holes 72 of the two inner push blocks 71 are provided with guide bars 76, which are parallel to the axial direction of the circular holes 72. The guide bars 76 of the two inner push blocks 71 are staggered, and the ends of the two cores 45 are respectively provided with chute 77 adapted to the guide bars 76, and the length of the chute 77 is greater than the length of the guide bars 76. Figure 7 As shown, after the core 45 enters the corresponding circular hole 72, the chute 77 on the core 45 docks with the guide bar 76 and slides along the guide bar 76. When the end of the core 45 moves to a range that does not exceed the circular hole 72, the chute 77 of the core 45 completely enters the circular hole 72. That is, when the chute 77 of the core 45 is completely entered into the circular hole 72, there is still a certain distance a78 between the guide bar 76 and the chute 77 ( Figure 7 When the cam 76 is in the closed position, the cam 76 is in the closed position, and the cam 76 is in the closed position, so that the cam 76 is in the closed position, and the cam 76 is in the closed position, so that the cam 76 is in the closed position, and the cam 76 is in the closed position, so that the cam 76 is in the closed position, and the cam 76 is in the closed position, so that the cam 76 is in the closed position, and the cam 76 is in the closed position, so that the cam 76 is in the closed position, and the cam 76 is in the closed position.

[0050] The internal auxiliary mechanism 7 can cooperate with the mold opening process when in use to separate the inner side of the handle 100 and the turning handle 101 of the formed handle 100 from the surface of the fixed mold 41, thereby destroying the initial adhesion between the inner side of the turning handle 101 and the surface of the fixed mold 41, making it easier to remove the handle 100 from the fixed mold 41.

[0051] In one embodiment of the present invention, a pushing mechanism is provided at the bottom of the fixed mold 41. The pushing mechanism includes at least two ejector rods 8. The ejector rods 8 are arranged in a vertical direction and are slidably connected to the inner wall of the fixed mold 41. The ejector rods 8 are moved upward to eject the injection molded part from the fixed mold 41. Specifically, one of the ejector rods 8 is located at the bent portion of the handle 100 ( Figure 9 As shown in b), the pushing mechanism also includes a cylinder or a hydraulic cylinder connected to the push rod 8, and its specific method is the existing technology and will not be described in detail here.

[0052] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the present invention.

Claims

1. A brake handle injection molding device, comprising a workbench (1), on which an injection device (2), a mold clamping mechanism (3) and a mold (4) are arranged, characterized in that: The mold (4) comprises a fixed mold (41) and two symmetrical movable molds (42); the mold clamping mechanism (3) is used to drive the movable mold (42) to approach or move away from the fixed mold (41) along a first direction (43); the fixed mold (41) and the two movable molds (42) are clamped to form a handle (100)-shaped cavity (44); the parting positions of the fixed mold (41) and the two movable molds (42) are respectively a first parting position and a second parting position; wherein the first parting position and the second parting position are respectively the middle parts of the two ends of the rotating handle (101) of the handle (100)-shaped cavity (44); and both movable molds (42) are provided with a core (45) for forming the shaft hole (103) at the rotating handle (101).

2. The brake handle injection molding device according to claim 1, characterized in that: The core (45) is connected to a core-pulling mechanism (5), and the core-pulling mechanism (5) is used to drive the core (45) to move along its own axial direction.

3. The brake handle injection molding device according to claim 1, characterized in that: The movable mold (42) is further provided with an external auxiliary mechanism (6), the external auxiliary mechanism (6) comprising an external stopper (61), one end of the external stopper (61) being fixedly connected to an external auxiliary rod (62), the surface of the core (45) being slidably connected to the outer stopper (61) and the inner wall of the outer auxiliary rod (62), the other end of the outer auxiliary rod (62) being connected to an external driving member (63), the outer auxiliary rod (62) being slidably connected to the inner wall of the movable mold (42), and a first accommodating cavity (64) adapted to the outer stopper (61) being provided in the mold cavity (44) in the movable mold (42).

4. The brake handle injection molding device according to claim 3, characterized in that: The external driving member (63) is used to drive the external auxiliary rod (62) to move along the first direction (43) to drive the external stopper (61) to move. When the mold is opened, the external stopper (61) abuts against the surface of the molded product.

5. The brake handle injection molding device according to claim 1, characterized in that: The fixed mold (41) is provided with an internal auxiliary mechanism (7) at a position opposite to the core (45). The internal auxiliary mechanism (7) includes two internal push blocks (71). The two internal push blocks (71) are symmetrically arranged on both sides of the fixed mold (41), and the internal push blocks (71) are slidably connected to the inner wall of the fixed mold (41). A circular hole (72) for the end of the core (45) to enter is opened on one side of the internal push block (71), and a second accommodating cavity (73) adapted to the internal push block (71) is opened on the fixed mold (41).

6. The brake handle injection molding device according to claim 5, characterized in that: The inner auxiliary mechanism (7) further comprises an elastic member (74), the elastic force of which acts on the inner push block (71) to cause it to have a tendency to move toward the fixed mold (41).

7. The brake handle injection molding device according to claim 6, characterized in that: The elastic member (74) includes two U-shaped spring pieces. Two end portions of the two inner push blocks (71) close to each other are provided with two slots (75). The two slots (75) on the same side abut against the two ends of the same spring piece.

8. The brake handle injection molding device according to claim 7, characterized in that: The inner walls of the circular holes (72) of the two inner push blocks (71) are both provided with guide bars (76), which are axially parallel to the circular holes (72). The guide bars (76) of the two inner push blocks (71) are staggered, and the ends of the two cores (45) are respectively provided with sliding grooves (77) adapted to the guide bars (76).

9. The brake handle injection molding device according to claim 1, characterized in that: A pushing mechanism is provided at the bottom of the fixed mold (41), and the pushing mechanism comprises at least two push rods (8). The push rods (8) are arranged in a vertical direction and are slidably connected to the inner wall of the fixed mold (41).

10. The brake handle injection molding device according to claim 1, characterized in that: The first parting position and the second parting position both have three parting surfaces, namely parting surface a (46), parting surface b (47) and parting surface c (48).

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