Injection mold facilitating demolding of workpiece

Abstract

The invention relates to the technical field of production of injection products, in particular to an injection mold facilitating demolding of a workpiece. The injection mold comprises a bottom plate, a left mold body, a right mold body, an injection molding machine and an air cylinder, the air cylinder is installed on the left side of the bottom plate, the right side of the air cylinder is connected with the left mold body, the right side of the bottom plate is connected with the right mold body, the injection molding machine is connected to the right end of the right mold body, and the left mold body and the right mold body are tightly attached. Clamping assemblies are arranged on the front side and the rear side of the left mold body and used for clamping products subjected to injection molding, adjusting assemblies are arranged on the clamping assemblies, and the adjusting assemblies are used for adjusting the width of the products clamped by the clamping assemblies according to production requirements. The rotatable rotating frame is matched with the clamping plate to clamp an injection molding workpiece, so that in the demolding process, the clamping plate is matched with the threaded rod rotating on the left mold, a worker does not need to clamp the injection molding workpiece, the labor cost is reduced, the production efficiency is improved, and the purpose of automatic demolding is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding product production, in particular to an injection molding die which is convenient for workpiece demoulding. Background Art

[0002] Injection molds, as the core tools in the injection molding process, are an indispensable and important part of industrial production. It heats the solid plastic raw materials to a molten state, and then uses the high pressure of the injection molding machine to inject the molten plastic into the molding cavity of the mold. After cooling and solidification, plastic products with specific shapes and sizes are formed. The injection mold not only determines the final shape of the product, but also directly affects the production efficiency, quality and production cost of the product. The design accuracy and manufacturing quality of the mold are crucial to ensure the consistency and reliability of the product.

[0003] In the design and application of injection molds, especially when producing plastic products with complex structures and high precision requirements, such as plastic nuts, the design of the mold needs to be carefully considered. Plastic nuts require a precise thread structure on their surface, which places extremely high demands on the manufacturing accuracy and demoulding method of the mold. After the injection molding of traditional injection molds is completed, although the screw on the mold can be rotated to assist in demoulding, the screw itself cannot move forward and backward. This results in the staff having to manually clamp the injection nut during the demoulding process to prevent the nut from falling off as the screw rotates, thereby increasing the difficulty of operation and production costs.

[0004] This defect not only increases the complexity of the operation in the production process, but may also cause damage to the surface threads of the nut, affecting product quality. In addition, the manual clamping of the nut for demoulding is not only inefficient, but also increases labor costs and safety risks, which is not conducive to achieving automated production and improving production efficiency. Summary of the invention

[0005] In order to overcome the disadvantage of difficult demoulding in the above production process, the present invention provides an injection mold that is convenient for automatic demoulding of a workpiece.

[0006] An injection mold for facilitating demoulding of a workpiece comprises a base plate, a left mold, a right mold, an injection molding machine and a cylinder. The cylinder is installed on the left side of the base plate, the left mold is connected to the right side of the cylinder, the right mold is connected to the right side of the base plate, and the right end of the right mold is connected to the injection molding machine. When the left mold and the right mold are tightly fitted, liquid plastic is injected through the injection molding machine to produce injection molded workpieces. The invention also comprises a clamping component and an adjusting component. The clamping components are arranged on the front and rear sides of the left mold for clamping the injection molded product. The adjusting component is arranged on the clamping component, and the adjusting component is used to adjust the width of the product clamped by the clamping component according to production requirements.

[0007] Further explanation: the clamping assembly includes a top frame, a mounting plate, a rotating frame, a torsion spring I and a clamping plate. The bottom of the top frame is connected to the bottom plate, the front and rear sides of the left mold are connected to the mounting plates, the mounting plate is rotatably connected to the rotating frame, and the upper and lower ends of the rotating frame are sleeved with torsion spring I, one end of the torsion spring I is connected to the mounting plate, and the other end is connected to the rotating frame. There are multiple pairs of clamping plates that cooperate with each other and are slidably connected to the rotating frame for clamping the injection molded workpiece.

[0008] Further explanation, the adjustment assembly includes a positioning plate, a rotating rod, a multi-section bidirectional screw, an elastic member and a positioning rod. The upper and lower ends of the rotating frame are connected with positioning plates. The middle of the positioning plate is rotatably connected with a rotating rod. A multi-section bidirectional screw is connected between the two rotating rods. The multi-section bidirectional screw is threadedly connected to the splint, and each section of the multi-section bidirectional screw is symmetrically connected with two mutually matching splints. A positioning rod is slidably connected in the rotating rod, and the positioning rod is limitedly matched with the positioning plate. An elastic member is arranged in the rotating rod, and one end of the elastic member is connected to the positioning rod, and the other end is connected to the rotating rod.

[0009] Further description, it also includes a spraying assembly, which includes a water pump, a support frame, a round nail, a rotating plate, a conduit and a spray pipe. The water pump is installed on the base plate, the base plate is connected to the support frame, the support frame is connected to the round nail, one end of the rotating plate is rotatably connected to the round nail, and the other end is connected to the spray pipe. The top of the spray pipe is connected to the water pump through the conduit, and the other end of the water pump is connected to the liquid storage barrel.

[0010] Further description, it also includes a bending top plate, a guide rod, a push plate, a concave ring, a pull rope and a torsion spring II. The top of the left mold is connected to the bending top plate, the top side of the support frame is connected to the guide rod, the push plate is slidably connected to the guide rod, the push plate and the bending top plate are squeezed together, one end of the rotating plate connected to the round nail is connected to the concave ring, one end of the pull rope is connected to the concave ring, the other end is connected to the push plate, and it bypasses the concave ring in the middle, a torsion spring II is sleeved on the round nail, one end of the torsion spring II is fixed on the round nail, and the other end is connected to the rotating plate.

[0011] Further description, it also includes a bending frame and a cushion block. The bending frame is connected to the mounting plate, and one end of the bending frame extending out is connected to a plurality of cushion blocks.

[0012] Further description, it also includes a material guide frame, a material outlet is opened in the middle of the bottom plate, and the lower end of the bottom plate is connected to the material guide frame.

[0013] It is further explained that a rotating assembly is provided in the left mold for rotating the threaded rod on the left mold, and the cushion block is soft in texture and will not damage the injection molded workpiece.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. Through the rotatable rotating frame, the injection molded workpiece is clamped in cooperation with the clamping plate. During the demoulding process, the clamping plate cooperates with the rotating threaded rod on the left mold, and there is no need for staff to clamp the injection molded workpiece, which reduces labor costs, improves production efficiency, and achieves the purpose of automatic demoulding.

[0016] 2. The spacing between the splints can be adjusted by adjusting the components to adapt to different production needs and optimize the applicability of production. The spray pipe can be automatically rotated by cooperating with the bending top plate and the push plate. The staff only needs to turn on and off the water pump, which reduces the staff's work content and makes the production process more automated. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 The figure is a schematic diagram of the installation structure of the left mold, the right mold, the injection molding machine and the cylinder of the present invention.

[0019] Figure 3 It is a schematic diagram of the connection structure of the clamping assembly of the present invention.

[0020] Figure 4 It is a schematic diagram of the connection structure of the adjustment component of the present invention.

[0021] Figure 5 It is an exploded view of the adjustment assembly of the present invention.

[0022] Figure 6 It is a schematic diagram of the connection structure of the spray assembly of the present invention.

[0023] Figure 7 It is a schematic diagram of the connection structure of the bent top plate, the push plate and the torsion spring II of the present invention.

[0024] Figure 8 It is a schematic diagram of the connection relationship of the material guide frame of the present invention.

[0025] Fig. 9 It is a schematic diagram of the connection relationship between the bending frame and the cushion block of the present invention.

[0026] Markings in the accompanying drawings: 1: base plate, 2: left mold, 3: right mold, 4: injection molding machine, 5: cylinder, 6: clamping assembly, 61: top frame, 62: mounting plate, 63: rotating frame, 64: torsion spring I, 65: clamping plate, 7: adjustment assembly, 71: positioning plate, 72: rotating rod, 73: multi-section bidirectional screw rod, 74: elastic member, 75: positioning rod, 8: spraying assembly, 81: water pump, 82: support frame, 821: round nail, 83: rotating plate, 84: conduit, 85: spraying pipe, 9: bending top plate, 91: guide rod, 92: push plate, 93: concave ring, 94: pull rope, 95: torsion spring II, 10: bending frame, 11: cushion block, 12: material guide frame. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0028] Embodiment: An injection mold for facilitating demoulding of a workpiece, such as Figure 1 and Figure 2 As shown, it includes a base plate 1, a left mold 2, a right mold 3, an injection molding machine 4 and a cylinder 5. The cylinder 5 is installed on the left side of the base plate 1, the left mold 2 is connected to the right side of the cylinder 5, the right mold 3 is connected to the right side of the base plate 1, and the right end of the right mold 3 is connected to the injection molding machine 4. When the left mold 2 and the right mold 3 are tightly fitted, liquid plastic is injected through the injection molding machine 4 to produce injection molded workpieces. A rotating component is arranged in the left mold 2 for rotating the threaded rod on the left mold 2, and the injection molded workpiece is squeezed by the rotating threaded rod to push out the injection molded nut or nut. The left mold 2 and the right mold 3 are provided with grooves for connecting multiple threaded rods to facilitate injection molding. It also includes a clamping component 6 and an adjusting component 7. The clamping components 6 are arranged on the front and rear sides of the left mold 2 for clamping the injection molded product. The adjusting component 7 is arranged on the clamping component 6. The adjusting component 7 is used to adjust the width of the product clamped by the clamping component 6 according to production requirements.

[0029] like Figure 3 and Figure 4 As shown, the clamping assembly 6 includes a top frame 61, a mounting plate 62, a rotating frame 63, a torsion spring I64 and a clamping plate 65. The bottom of the top frame 61 is connected to the bottom plate 1. The mounting plate 62 is bolted to the front and rear sides of the left mold 2 for easy disassembly. The mounting plate 62 is rotatably connected to the rotating frame 63. The rotating frame 63 is sleeved with a torsion spring I64 at both ends. One end of the torsion spring I64 is connected to the mounting plate 62, and the other end is connected to the rotating frame 63. The rotating frame 63 is slidably connected to multiple pairs of clamping plates 65 that cooperate with each other for clamping the injection molded workpiece.

[0030] like Figure 4 and Figure 5 As shown, the adjustment assembly 7 includes a positioning plate 71, a rotating rod 72, a multi-section bidirectional screw rod 73, an elastic member 74 and a positioning rod 75. The upper and lower ends of the rotating frame 63 are connected to the positioning plates 71, and the rotating rod 72 is rotatably connected in the middle of the positioning plate 71. A multi-section bidirectional screw rod 73 is connected between the two rotating rods 72. The multi-section bidirectional screw rod 73 is threadedly connected to the clamping plate 65, and each section of the multi-section bidirectional screw rod 73 is symmetrically connected to two mutually matching clamping plates 65. A positioning rod 75 is slidably connected in the rotating rod 72, and the positioning rod 75 is limitedly matched with the positioning plate 71. A positioning hole is opened on the positioning plate 71, and the positioning rod 75 is inserted into the positioning hole. An elastic member 74 is arranged in the rotating rod 72, and one end of the elastic member 74 is connected to the positioning rod 75, and the other end is connected to the rotating rod 72.

[0031] The staff starts the injection molding machine 4 to preheat the injection molding material. When the plastic is completely melted, the cylinder 5 is turned on, and the left mold 2 moves toward the right mold 3. When the left mold 2 and the right mold 3 are completely fitted, the melted plastic is injected through the injection molding machine 4. After injecting a certain amount of plastic, it is left to stand for a period of time to wait for the plastic to cool and set. Then, the left mold 2 is pulled by the cylinder 5 to separate the left mold 2 from the right mold 3. Since a rotating component is provided in the left mold 2 for rotating the threaded rod on the left mold 2, the contact area between the left mold 2 and the injection molded workpiece is much larger than that of the right mold 3, and the injection molded workpiece will follow the left mold 2 to a certain extent and move with the right mold 3. The right mold 3 is disengaged. During the process of the left mold 2 moving to the left, the clamping components 6 on both sides of the left mold 2 rotate during the movement, and finally the clamping plates 65 clamp the injection molded workpiece. After the rotating component is turned on, the injection molded workpiece slowly moves to the right under the extrusion of the threaded rod to complete the demoulding process. In addition, for different workpiece sizes, the distance between the two clamping plates 65 that cooperate with each other can be adjusted by adjusting the component 7 to meet the production requirements of different workpiece sizes. After the staff removes the injection molded workpiece between the clamping plates 65, the cylinder 5 is used to push the left mold 2 to the right again for the next production. After the production is completed, the injection molding machine 4 and the cylinder 5 are turned off;

[0032] As for the demoulding process, it is necessary to supplement that: during the movement of the left mold 2 to the left, the rotating frames 63 on both sides contact the top frame 61, and after being squeezed by the top frame 61, the rotating frame 63 rotates toward the middle and twists the torsion spring I 64 at the same time. After the rotating frame 63 drives the adjusting assembly 7 and the clamping plate 65 to rotate, each two clamping plates 65 clamp an injection molded workpiece. After the threaded rod on the left mold 2 rotates, the injection molded workpiece is restricted by the clamping plate 65 and cannot rotate. Therefore, after the thread of the threaded rod is squeezed, it gradually breaks away from the threaded rod, slides backward along the clamping plate 65, and finally breaks away from the left mold 2 to complete the demoulding. When the cylinder 5 pushes the left mold 2 to move to the right, the rotating frame 63 gradually breaks away from the top frame 61. When the rotating frame 63 breaks away from the top frame 61, the torsion spring I 64 resets and rotates, driving the rotating frame 63 to rotate to both sides and leave the right end surface of the left mold 2, thereby not affecting the fitting of the left mold 2 and the right mold 3.

[0033] The locking cam 75 is engaged with the locking cam 76 and the locking cam 77 is engaged with the locking cam 78. When the locking cam 76 is engaged, the locking cam 78 is engaged with the locking cam 78. When the locking cam 76 is engaged, the locking cam 78 is engaged with the locking cam 78.

[0034] like Figure 6 As shown, it also includes a spraying assembly 8, which includes a water pump 81, a support frame 82, a round nail 821, a rotating plate 83, a conduit 84 and a spraying pipe 85. The water pump 81 is installed on the base plate 1, and the base plate 1 is connected to the support frame 82, and the support frame 82 is connected to the round nail 821. One end of the rotating plate 83 is rotatably connected to the round nail 821, and the other end is connected to the spraying pipe 85. The nozzle of the spraying pipe 85 faces the right end surface of the left mold 2 and the left end surface of the right mold 3. The top of the spraying pipe 85 is connected to the water pump 81 through the conduit 84, and the other end of the water pump 81 is connected to a liquid storage barrel.

[0035] When demolding is completed, rotate the rotating plate 83 so that the nozzle of the spray pipe 85 faces the right end surface of the left mold 2 and the left end surface of the right mold 3, and then turn on the water pump 81. The water pump 81 draws demolding liquid from the liquid storage barrel. The demolding liquid can effectively prevent the mold and the finished product from sticking, ensure the smooth surface of the finished product, and promote the rapid and lossless separation of the workpiece and the mold. The demolding liquid enters the spray pipe 85 through the conduit 84 and is sprayed on the left mold 2 and the right mold 3. Then turn off the water pump 81, rotate the rotating rod 72 135 degrees, leave between the left mold 2 and the right mold 3, and then push the left mold 2 through the cylinder 5.

[0036] like Figure 6 and Figure 7 As shown, it also includes a bending top plate 9, a guide rod 91, a push plate 92, a concave ring 93, a pull rope 94 and a torsion spring II 95. The top of the left mold 2 is connected to the bending top plate 9, the top side of the support frame 82 is connected to the guide rod 91, the push plate 92 is slidably connected to the guide rod 91, the push plate 92 is squeezed and matched with the bending top plate 9, the rotating plate 83 is connected to the concave ring 93, the concave ring 93 is sleeved on the round nail 821, one end of the pull rope 94 is connected to the concave ring 93, and the other end is connected to the push plate 92, and it bypasses the concave ring 93 in the middle, and a torsion spring II 95 is sleeved on the round nail 821, one end of the torsion spring II 95 is fixed on the round nail 821, and the other end is connected to the rotating plate 83.

[0037] Before injection molding, the demoulding process of the previous round of workpieces has been completed, and the demoulding liquid is sprayed using the spray tube 85. Then the left mold 2 moves to the right, and the bent top plate 9 follows the left mold 2 to move to the right. Under the extrusion of the bent top plate 9, the push plate 92 slides along the guide rod 91, and through the transmission action of the pull rope 94, the rotating plate 83 rotates, and the torsion spring II 95 is twisted. After the push plate 92 is separated from the inclined surface of the bent top plate 9, the rotating plate 83 has rotated 135 degrees and leaves between the left mold 2 and the right mold 3. After the injection molded workpiece is cooled, the left mold The left mold 2 moves to the left. At this time, the bent top plate 9 follows the left mold 2 to move to the left and gradually separates from the push plate 92. When the push plate 92 and the inclined surface of the bent top plate 9 contact and separate, under the action of the torsion spring II 95, the torsion spring II 95 drives the rotating plate 83 to rotate, and at the same time drives the concave ring 93 to rotate. The concave ring 93 pulls the push plate 92 through the pull rope 94, and the push plate 92 slides along the guide rod 91 toward the support frame 82. The rotating plate 83 drives the spray tube 85 to rotate and reset, and re-locates between the left mold 2 and the right mold 3, which is convenient for subsequent spraying work.

[0038] like Figure 8 and Fig. 9 As shown, it also includes a bending frame 10 and a cushion block 11. The bending frame 10 is connected to the mounting plate 62. One end of the bending frame 10 that extends out is connected to a plurality of cushion blocks 11. The cushion blocks 11 are soft and will not damage the injection molded workpiece.

[0039] like Fig. 9 As shown, it also includes a material guide frame 12, a material outlet is opened in the middle of the bottom plate 1, and the lower end of the bottom plate 1 is connected to the material guide frame 12.

[0040] The injection-molded workpieces are connected into a whole through the plastic rod in the middle, so that when the clamping assembly 6 is unfolded to both sides, most of the injection-molded workpieces clamped in the middle of the clamping plate 65 will be detached from the clamping plate 65, or the forces on the left and right sides are equal and all of them will be detached at the same time. If there are injection-molded workpieces that have not been detached, they will rotate to both sides together with the rotating frame 63. The injection-molded workpieces between the clamping plates 65 will contact the pads 11 on the bending frame 10 and be squeezed by the pads 11, thereby detaching from the clamping plates 65, falling down, passing through the bottom plate 1, and sliding out along the material guide frame 12.

[0041] It should be understood that the above description is only for exemplary purposes and is not meant to limit the present invention. Those skilled in the art will appreciate that variations of the present invention will be included within the scope of the claims herein.

Claims

1. An injection mold for facilitating demoulding of a workpiece, comprising a base plate (1), a left mold (2), a right mold (3), an injection molding machine (4) and a cylinder (5), wherein the cylinder (5) is installed on the left side of the base plate (1), the left mold (2) is connected to the right side of the cylinder (5), the right mold (3) is connected to the right side of the base plate (1), and the right end of the right mold (3) is connected to the injection molding machine (4), when the left mold (2) and the right mold (3) are tightly fitted, liquid plastic is injected through the injection molding machine (4), and is used to produce an injection molded workpiece, wherein the invention is characterized in that: The invention also comprises a clamping assembly (6) and an adjusting assembly (7). The left mold (2) is provided with a clamping assembly (6) on both the front and rear sides thereof for clamping the product after injection molding. The clamping assembly (6) is provided with an adjusting assembly (7). The adjusting assembly (7) is used to adjust the width of the product clamped by the clamping assembly (6) according to production requirements.

2. The injection mold for facilitating demoulding of a workpiece according to claim 1, characterized in that: The clamping assembly (6) comprises a top frame (61), a mounting plate (62), a rotating frame (63), a torsion spring I (64) and a clamping plate (65). The bottom of the top frame (61) is connected to the bottom plate (1). The left mold (2) is connected to the mounting plate (62) at the front and rear sides. The mounting plate (62) is rotatably connected to the rotating frame (63). The rotating frame (63) is sleeved with a torsion spring I (64) at the upper and lower ends. One end of the torsion spring I (64) is connected to the mounting plate (62), and the other end is connected to the rotating frame (63). The rotating frame (63) is slidably connected to multiple pairs of clamping plates (65) that cooperate with each other for clamping the injection molded workpiece.

3. The injection mold for facilitating demoulding of a workpiece according to claim 2, characterized in that: The adjusting assembly (7) comprises a positioning plate (71), a rotating rod (72), a multi-section bidirectional screw rod (73), an elastic member (74) and a positioning rod (75); the upper and lower ends of the rotating frame (63) are connected with the positioning plates (71); the middle of the positioning plate (71) is rotatably connected with the rotating rod (72); the multi-section bidirectional screw rod (73) is connected between the two rotating rods (72); the multi-section bidirectional screw rod (73) is threadedly connected to the clamping plate (65), and each section of the multi-section bidirectional screw rod (73) is symmetrically connected with two mutually matching clamping plates (65); the rotating rod (72) is slidably connected with the positioning rod (75); the positioning rod (75) and the positioning plate (71) are limitedly matched; an elastic member (74) is arranged in the rotating rod (72); one end of the elastic member (74) is connected to the positioning rod (75), and the other end is connected to the rotating rod (72).

4. The injection mold for facilitating demoulding of a workpiece according to claim 1, characterized in that: The invention also comprises a spraying assembly (8), which comprises a water pump (81), a support frame (82), a round nail (821), a rotating plate (83), a conduit (84) and a spraying pipe (85). The water pump (81) is installed on the bottom plate (1), the support frame (82) is connected to the bottom plate (1), the round nail (821) is connected to the support frame (82), one end of the rotating plate (83) is rotatably connected to the round nail (821), and the other end is connected to the spraying pipe (85), the top of the spraying pipe (85) is connected to the water pump (81) through the conduit (84), and the other end of the water pump (81) is connected to a liquid storage bucket.

5. The injection mold for facilitating demoulding of a workpiece according to claim 4, characterized in that: The invention also comprises a bending top plate (9), a guide rod (91), a push plate (92), a concave ring (93), a pull rope (94) and a torsion spring II (95). The top of the left mold (2) is connected with the bending top plate (9), the top side of the support frame (82) is connected with the guide rod (91), the guide rod (91) is slidably connected with the push plate (92), the push plate (92) and the bending top plate (9) are pressed and matched, one end of the rotating plate (83) connected with the round nail (821) is connected with the concave ring (93), one end of the pull rope (94) is connected to the concave ring (93), and the other end is connected to the push plate (92), and the concave ring (93) is bypassed in the middle, and a torsion spring II (95) is sleeved on the round nail (821), one end of the torsion spring II (95) is fixed on the round nail (821), and the other end is connected to the rotating plate (83).

6. The injection mold for facilitating demoulding of a workpiece according to claim 2, characterized in that: It also comprises a bending frame (10) and a cushion block (11); the bending frame (10) is connected to the mounting plate (62); and a plurality of cushion blocks (11) are connected to one protruding end of the bending frame (10).

7. The injection mold for facilitating demoulding of a workpiece according to claim 1, characterized in that: It also comprises a material guide frame (12); a material discharge port is provided in the middle of the bottom plate (1); and the lower end of the bottom plate (1) is connected to the material guide frame (12).

8. The injection mold for facilitating demoulding of a workpiece according to claim 7, characterized in that: A rotating assembly is arranged inside the left mold (2) for rotating the threaded rod on the left mold (2); the cushion block (11) is soft and will not damage the injection molded workpiece.

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