Double-color injection mold for plastic product

Abstract

The invention relates to the technical field of injection molds, in particular to a double-color injection mold for plastic products, the double-color injection mold comprises a right mold and a left mold, the right mold comprises a right seat plate, a right cover plate is fixedly connected to the side wall of one side of the right seat plate, a receding groove is formed in the side wall of one side of the right cover plate, and two half molds are arranged in the receding groove. According to the injection mold, the two half molds are matched with the push connecting assembly and the like for use, and the inner walls of the two half molds can be provided with grooves or connecting convex blocks, so that the outer wall of a product subjected to one-time injection molding can be provided with the grooves and the convex blocks, and the inner wall of a product subjected to second-time injection molding can form convex blocks matched with the grooves or grooves matched with the convex blocks during second-time injection molding; by means of the structure, even if connection between materials of primary injection molding and secondary injection molding of a product is not stable, a stable wedge can be formed between the groove and the protruding block, the materials of the primary injection molding and the materials of the secondary injection molding can be stably connected, limitation to the materials during double-shot molding is avoided, and the practicability of double-shot molding is improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, in particular to a double-color injection mold for plastic products. Background Art

[0002] Two-color injection mold is a special mold technology used to manufacture plastic products composed of two different colors or different materials. It is formed into a composite structure part by injecting different materials (or the same material in different colors) twice on the same injection molding machine. This technology is widely used in consumer electronics, automobiles, medical devices, daily necessities and other fields to improve product functionality and aesthetics.

[0003] One side of the two-color injection mold is installed on a rotatable template. After the first injection, the template drives the mold to rotate 180° for the second injection. In this way, after the first injection, when the template is separated, in order to make the first injection product demould smoothly, the outer wall of the first injection product cannot have protrusions or grooves. In this way, the material of the first injection and the material of the second injection are subject to certain restrictions. Only when the two materials have a certain adhesion can they be used for two-color injection. Otherwise, the materials of the two injections may fall off and separate, which greatly limits the practicality of two-color injection. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a two-color injection mold for plastic products.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a two-color injection mold for plastic products, comprising a right mold and a left mold; The right mold includes a right seat plate, and one side wall of the right seat plate is fixedly connected to the right cover plate, one side wall of the right cover plate is provided with a clearance groove, and two half molds are arranged in the clearance groove, one side wall of the half mold is fixedly connected to a connecting rod, and one end of the connecting rod passes through the right cover plate and extends to one side of the right cover plate, a pushing connection component is arranged on one side of the connecting rod on one side of the right cover plate, one side wall of the half mold is fixedly connected to a spring sheet, and one end of the spring sheet is fixedly connected to a fixing plate, the fixing plate is fixedly connected to the inner wall of the clearance groove, and one side wall of the right cover plate is provided with a mold cavity.

[0006] Preferably, the pushing connection assembly includes a push rod fixing rod passing through the right seat plate, and one end of the push rod fixing rod is fixedly connected to a wedge block, one end of the push rod fixing rod is fixedly connected to a connecting block, and one side wall of the connecting block is rotatably connected to a rotating rod, and the rotating rod is arranged on one side of the wedge block.

[0007] Preferably, the left mold includes a left seat plate, and a left cover plate is fixedly connected to one side side wall of the left seat plate. Four fixing holes are opened on one side side wall of the left cover plate, and a pin mold is fixedly connected to the inner wall of the fixing hole. A blanking ejector rod is slidably connected to the inner wall of the pin mold, and a compression spring is sleeved on the outer wall of the blanking ejector rod. One end of the compression spring is fixedly connected to the blanking ejector rod, and the other end of the compression spring is fixedly connected to the pin mold. A fixing seat is rotatably connected to one side side wall of the left seat plate, and a guide block is fixedly connected to one side side wall of the fixing seat. One end of the blanking ejector rod penetrates through the left seat plate and extends to one side of the fixing seat, and a driving mechanism is arranged on one side of the fixing seat.

[0008] Preferably, the driving mechanism includes a motor fixedly connected to the fixing seat, and a gear is fixedly connected to the driving end of the motor. A ring gear groove is opened on one side side wall of the left seat plate, and the ring gear groove meshes with the gear.

[0009] Preferably, a connecting plate is fixedly connected to one side side wall of the right cover plate, and a groove is opened on one side side wall of the connecting plate. A trimming knife is detachably connected to the inner wall of the groove.

[0010] Preferably, a connecting shaft is fixedly connected to one side side wall of the fixing seat, and a bearing is fixedly sleeved on the outer wall of the connecting shaft. The outer wall of the bearing is fixedly connected to the left seat plate.

[0011] Preferably, a clamping groove is opened at one end of the blanking ejector rod, and a ball is arranged in the clamping groove.

[0012] Preferably, a fixing through hole is opened on one side side wall of the fixing seat.

[0013] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, by setting two half molds and a pushing connection component in cooperation, grooves or connecting protrusions can be opened on the inner walls of the two half molds. In this way, grooves and protrusions will be formed on the outer wall of the product injection-molded once. When the second injection molding is carried out, protrusions matching the grooves or grooves matching the protrusions will be formed on the inner wall of the product injection-molded the second time. Even if the connection between the materials of the first injection molding and the second injection molding of the product is unstable, a stable wedge can be formed between the grooves and the protrusions, and the materials of the first injection molding and the second injection molding can also be stably connected, avoiding the limitation of materials in two-color injection molding and improving the practicability of two-color injection molding.

[0014] In the present invention, by arranging a trimming knife and the like for combined use, when the mold is closed, the trimming knife approaches the product completed by the first injection molding, so that the trimming knife can trim the product just completed by injection molding. In this way, even if there is flash between the two half-molds, the trimming knife can trim the edges neatly, avoiding the influence of the overflowing edges on the second injection molding. Moreover, such trimming is carried out simultaneously with the injection molding of the next product, without delaying the injection molding time due to trimming. Therefore, when the device trims, the injection molding efficiency will not be delayed.

[0015] In the present invention, after the second injection molding is completed, the mold is split again. Subsequently, the motor drives the product completed by the second injection molding to rotate. When rotating, one end of the blanking ejector rod contacts the guide block, causing the guide block to push the blanking ejector rod to move. The moving blanking ejector rod pushes the product after the second injection molding, completing the blanking of the product, which is convenient and fast. Brief Description of the Drawings

[0016] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is Figure 1 the enlarged structural schematic diagram at A in Figure 3 is the left mold structural schematic diagram of the present invention; Figure 4 is the right mold structural schematic diagram of the present invention; Figure 5 is Figure 4 the enlarged structural schematic diagram at B in Figure 6 is Figure 4 the enlarged structural schematic diagram at C in Figure 7 is the left mold sectional structural schematic diagram of the present invention; Figure 8 is Figure 7 the enlarged structural schematic diagram at D in

[0017] In the figure: 1, right seat plate; 2, right cover plate; 3, relief groove; 4, half mold; 5, connecting rod; 6, spring piece; 7, fixing plate; 8, mold cavity; 9, ejector rod fixing rod; 10, wedge block; 11, connecting block; 12, rotating rod; 13, left seat plate; 14, left cover plate; 15, fixing hole; 16, die locking; 17, blanking ejector rod; 18, compression spring; 19, fixing seat; 20, guide block; 21, motor; 22, gear; 23, ring tooth groove; 24, connecting plate; 25, groove; 26, trimming knife; 27, connecting shaft; 28, bearing; 29, ball; 30, fixing through hole; 101, right mold; 102, left mold. Detailed Embodiments

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] See also Figures 1-8 , a two-color injection mold for plastic products, including a right mold 101 and a left mold 102; The right mold 101 includes a right seat plate 1, and one side wall of the right seat plate 1 is fixedly connected to the right cover plate 2, one side wall of the right cover plate 2 is provided with a makeshift groove 3, and two half molds 4 are arranged in the makeshift groove 3, one side wall of the half mold 4 is fixedly connected with a connecting rod 5, and one end of the connecting rod 5 passes through the right cover plate 2 and extends to one side of the right cover plate 2, a pushing connection assembly is arranged on one side of the connecting rod 5 on one side of the right cover plate 2, one side wall of the half mold 4 is fixedly connected with a spring sheet 6, and one end of the spring sheet 6 is fixedly connected with a fixing plate 7, the fixing plate 7 is fixedly connected to the inner wall of the makeshift groove 3, and a mold cavity 8 is opened on one side wall of the right cover plate 2.

[0020] It can be seen from the above structure that: by setting two half molds 4 for use in conjunction with a push-connecting component, the inner walls of the two half molds 4 can be provided with grooves or connecting protrusions, so that the outer wall of the product molded once will have grooves and protrusions, and when performing a second injection molding, the inner wall of the product molded by the second injection will form a protrusion matching the groove or a groove matching the protrusion, so that even if the connection between the materials of the first injection molding and the second injection molding of the product is unstable, a stable wedge can be formed between the groove and the protrusion, and the materials of the first injection molding and the second injection molding can also be stably connected, avoiding restrictions on materials during two-color injection molding and improving the practicality of two-color injection molding.

[0021] Furthermore, the pushing connection assembly includes a push rod fixing rod 9 that passes through the right seat plate 1, and one end of the push rod fixing rod 9 is fixedly connected to a wedge block 10, one end of the push rod fixing rod 9 is fixedly connected to a connecting block 11, and one side wall of the connecting block 11 is rotatably connected to a rotating rod 12, and the rotating rod 12 is arranged on one side of the wedge block 10; by arranging the wedge block 10 and the rotating rod 12 to be used in conjunction with each other, when the push rod pushes the right mold 101 to move and close the mold, the push rod will first push the push rod fixing rod 9 to move, and the moving push rod fixing rod 9 pushes the wedge block 10 to move. After the wedge block 10 moves to a certain position, the wedge block 10 contacts the rotating rod 12, so that the wedge block 10 pushes the rotating rod 12 to move, and the moving rotating rod 12 drives the connecting rod 5 and the two half molds 4 to move, so that the two half molds 4 can be combined into a complete cavity.

[0022] Further, the left mold 102 includes a left seat plate 13, and a left cover plate 14 is fixedly connected to one side side wall of the left seat plate 13. Four fixing holes 15 are provided on one side side wall of the left cover plate 14, and a pin mold 16 is fixedly connected to the inner wall of the fixing hole 15. A blanking ejector rod 17 is slidably connected to the inner wall of the pin mold 16, and a compression spring 18 is sleeved on the outer wall of the blanking ejector rod 17. One end of the compression spring 18 is fixedly connected to the blanking ejector rod 17, and the other end of the compression spring 18 is fixedly connected to the pin mold 16. A fixing seat 19 is rotatably connected to one side side wall of the left seat plate 13, and a guide block 20 is fixedly connected to one side side wall of the fixing seat 19. One end of the blanking ejector rod 17 penetrates through the left seat plate 13 and extends to one side of the fixing seat 19, and a driving mechanism is arranged on one side of the fixing seat 19; by setting the pin mold 16, the compression spring 18 and the guide block 20 to cooperate with each other, after the right mold 101 is reset, the driving mechanism drives the left seat plate 13, the left cover plate 14, the pin mold 16 and the blanking ejector rod 17 to rotate by 90 degrees. When the pin mold 16 rotates 90 degrees, one of the pin molds 16 rotates to one side of the two half molds 4, and the product that has just been injection-molded once rotates to one side of the connecting plate 24, and then the molds are closed again for the next injection molding.

[0023] Further, the driving mechanism includes a motor 21 fixedly connected to the fixing seat 19, and a gear 22 is fixedly connected to the driving end of the motor 21. A ring gear groove 23 is provided on one side side wall of the left seat plate 13, and the ring gear groove 23 meshes with the gear 22; by setting the gear 22 and the ring gear groove 23 to cooperate with each other, when the motor 21 is started, the motor 21 drives the gear 22 to rotate, and the rotating gear 22 passes through the ring gear groove 23.

[0024] Further, a connecting plate 24 is fixedly connected to one side side wall of the right cover plate 2, and a groove 25 is provided on one side side wall of the connecting plate 24. A trimming knife 26 is detachably connected to the inner wall of the groove 25; by setting the trimming knife 26 to cooperate with each other, when the molds are closed, the trimming knife 26 approaches the product that has just been injection-molded once, so that the trimming knife 26 can trim the product that has just been injection-molded. In this way, even if there is flash between the two half molds 4, the trimming knife 26 can also trim the edge neatly, avoiding the overflowing edge from affecting the second injection molding.

[0025] Further, a connecting shaft 27 is fixedly connected to one side side wall of the fixing seat 19, and a bearing 28 is fixedly sleeved on the outer wall of the connecting shaft 27. The outer wall of the bearing 28 is fixedly connected to the left seat plate 13; by setting the connecting shaft 27 and the bearing 28 to cooperate with each other, the connection stability between the fixing seat 19 and the left seat plate 13 can be increased.

[0026] Further, a card slot is provided at one end of the blanking ejector rod 17, and a ball 29 is arranged in the card slot; by setting the ball 29, the friction between one end of the blanking ejector rod 17 and the guide block 20 can be reduced.

[0027] Furthermore, a fixing through hole 30 is formed in one side wall of the fixing base 19; by providing the fixing through hole 30, a left mold 102 can be fixed to one side of an injection molding machine using a bolt and the fixing through hole 30.

[0028] Before use, fix the left mold 102 to one side of the injection molding machine using a bolt and the fixing through hole 30, and connect the push rod of the injection molding machine that pushes the right mold 101 to move for mold clamping with the push rod fixing rod 9. When in use, when the push rod pushes the right mold 101 to move for mold clamping, the push rod will first push the push rod fixing rod 9 to move. The moving push rod fixing rod 9 pushes the wedge block 10 to move. After the wedge block 10 moves to a certain position, the wedge block 10 contacts the rotating rod 12, causing the wedge block 10 to push the rotating rod 12 to move. The moving rotating rod 12 drives the connecting rod 5 and the two half molds 4 to move, enabling the two half molds 4 to form a complete cavity. Subsequently, the push rod pushes the right mold 101 towards the left mold 102 to complete mold clamping. After mold clamping, injection and cooling can be carried out into the two half molds 4 to process a product injection molded at one time. Subsequently, the push rod pulls the push rod fixing rod 9 and the right mold 101 to reset. When the push rod fixing rod 9 resets, the reset push rod fixing rod 9 first drives the wedge block 10 to reset. When the wedge block 10 resets, the spring piece 6 pushes the two half molds 4 apart. After the two half molds 4 are separated, the push rod fixing rod 9 continues to pull the right mold 101 to reset. After the right mold 101 resets, the product injection molded at one time is sleeved on the outer wall of one of the pin molds 16. In this way, grooves or connecting bumps can be formed on the inner walls of the two half molds 4. In this case, grooves and bumps will be formed on the outer wall of the product injection molded at one time. When performing the second injection molding, bumps matching the grooves or grooves matching the bumps will be formed on the inner wall of the product of the second injection molding, enabling a stable wedge to be formed between the grooves and bumps even if the connection between the materials of the first injection molding and the second injection molding of the product is unstable, and also enabling the materials of the first injection molding and the second injection molding to be stably connected, avoiding restrictions on materials during two-color injection molding and improving the practicability of two-color injection molding. After the right mold 101 resets, the motor 21 is started, causing the motor 21 to drive the gear 22 to rotate. The rotating gear 22 drives the left seat plate 13, the left cover plate 14, the pin mold 16, and the blanking ejector rod 17 to rotate by 90 degrees through the ring tooth groove 23. When the pin mold 16 rotates by 90 degrees, one of the pin molds 16 rotates to one side of the two half molds 4, and the product that has just been injection molded at one time and is sleeved on it rotates to one side of the connecting plate 24. Then, mold clamping is carried out again for the next injection molding. When mold clamping is carried out this time, the trimming knife 26 approaches the product that has just been injection molded, enabling the trimming knife 26 to trim the product that has just been injection molded. In this way, even if there is flash between the two half molds 4, the trimming knife 26 can trim the edge neatly, preventing the overflowed edge from affecting the second injection molding. Moreover, the trimming is carried out simultaneously with the next product injection molding, without delaying the injection molding time due to trimming. Thus, when the device is trimming, the injection molding efficiency will not be affected. After trimming is completed, the right mold 101 and the left mold 102 are separated. After separation, the motor 21 is started, causing the motor 21 to drive the gear 22 to rotate. The rotating gear 22 drives the left seat plate 13, the left cover plate 14, the pin mold 16 and the blanking ejector rod 17 to rotate another ninety degrees through the ring gear groove 23. At this time, the just-trimmed product rotates to one side of the mold cavity 8. When the right mold 101 and the left mold 102 are closed, the trimmed product will be inserted into the groove mold cavity 8 for the second injection molding. After the second injection molding is completed, the molds are separated again. Subsequently, the motor 21 drives the product after the second injection molding to rotate. When rotating, one end of the blanking ejector rod 17 contacts the guide block 20, causing the guide block 20 to push the blanking ejector rod 17 to move. The moving blanking ejector rod 17 pushes the product after the second injection molding to complete the blanking of the product.

[0029] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A two-color injection mold for a plastic product, comprising a right mold (101) and a left mold (102), characterized in that ； The right mold (101) comprises a right base plate (1), and a side wall of the right base plate (1) is fixedly connected to a right cover plate (2), a side wall of the right cover plate (2) is provided with a clearance groove (3), and two half molds (4) are arranged in the clearance groove (3), a side wall of each half mold (4) is fixedly connected to a connecting rod (5), and one end of the connecting rod (5) passes through the right cover plate (2) and extends to one side of the right cover plate (2), and a push connection component is arranged on one side of the connecting rod (5) located on one side of the right cover plate (2), a side wall of the half mold (4) is fixedly connected to a spring sheet (6), and one end of the spring sheet (6) is fixedly connected to a fixing plate (7), and the fixing plate (7) is fixedly connected to the inner wall of the clearance groove (3), and a mold cavity (8) is provided on one side wall of the right cover plate (2).

2. A two-color injection mold for plastic products according to claim 1, characterized in that: The push connection assembly comprises a push rod fixing rod (9) penetrating the right seat plate (1), one end of the push rod fixing rod (9) is fixedly connected to a wedge block (10), one end of the push rod fixing rod (9) is fixedly connected to a connecting block (11), and a side wall of one side of the connecting block (11) is rotatably connected to a rotating rod (12), and the rotating rod (12) is arranged on one side of the wedge block (10).

3. A two-color injection mold for plastic products according to claim 1, characterized in that: The left mold (102) comprises a left base plate (13), and a left cover plate (14) is fixedly connected to a side wall of one side of the left base plate (13); four fixing holes (15) are opened on a side wall of one side of the left cover plate (14); a pin mold (16) is fixedly connected to the inner wall of the fixing hole (15); a material discharge ejector rod (17) is slidably connected to the inner wall of the pin mold (16); a compression spring (18) is sleeved on the outer wall of the material discharge ejector rod (17); one end of the compression spring (18) is fixedly connected to the material discharge ejector rod (17); and the other end of the compression spring (18) is fixedly connected to the pin mold (16); a fixed seat (19) is rotatably connected to a side wall of one side of the left base plate (13); and a guide block (20) is fixedly connected to a side wall of the fixed seat (19); one end of the material discharge ejector rod (17) passes through the left base plate (13) and extends to one side of the fixed seat (19); and a driving mechanism is provided on one side of the fixed seat (19).

4. A two-color injection mold for plastic products according to claim 3, characterized in that: The driving mechanism comprises a motor (21) fixedly connected to a fixed seat (19), and a gear (22) is fixedly connected to a driving end of the motor (21), and a ring tooth groove (23) is formed on a side wall of one side of the left seat plate (13), and the ring tooth groove (23) meshes with the gear (22).

5. A two-color injection mold for plastic products according to claim 1, characterized in that: A connecting plate (24) is fixedly connected to one side wall of the right cover plate (2), and a groove (25) is formed on one side wall of the connecting plate (24), and a trimming knife (26) is detachably connected to the inner wall of the groove (25).

6. A two-color injection mold for plastic products according to claim 3, characterized in that: A connecting shaft (27) is fixedly connected to a side wall of the fixed seat (19), and a bearing (28) is fixedly sleeved on an outer wall of the connecting shaft (27), and an outer wall of the bearing (28) is fixedly connected to the left seat plate (13).

7. A two-color injection mold for plastic products according to claim 3, characterized in that: A slot is formed at one end of the ejector rod (17), and a ball (29) is arranged in the slot.

8. A two-color injection mold for plastic products according to claim 3, characterized in that: A fixing through hole (30) is formed on one side wall of the fixing seat (19).

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