A mold for avoiding parting lines

Abstract

The application discloses a mold for avoiding part parting line, and relates to the technical field of mold forming, which comprises a mold shell mechanism, an upper cavity shell and a lower cavity shell, the mold shell mechanism comprises a top plate, an upper mold shell and a lower mold shell, and the bottom surface of the upper mold shell and the top surface of the lower mold shell are both provided with a cavity. The bottom opening of the upper cavity shell and the top opening of the lower cavity shell are turned outward to form bending parts, the first sealing strip and the second sealing strip are arranged on the inner sides of the upper bending part and the lower bending part respectively, the upper bending part and the lower bending part are connected by the parting diaphragm with toughness, when the upper mold and the lower mold are abutted with position stagger, the curvature of the parting diaphragm connection part changes, the parting diaphragm is tightly attached to the sealing strip by the magnetic repulsion force of the electromagnet and the magnet, and the upper cavity shell, the lower cavity shell, the two sealing strips and the parting diaphragm form a continuous curved surface, so that the sharpness of the parting line is reduced, and the problem that the parting line cuts hands due to the dislocation of the parting surface of the two molds is solved.

Description

Technical Field

[0001] This invention relates to the field of mold forming technology, specifically to a mold that avoids parting lines on parts. Background Technology

[0002] Molds are various shapes and tools used in industrial production to obtain desired products through methods such as injection molding, blow molding, extrusion, die casting, forging, smelting, and stamping. Molds are process equipment used in industrial product manufacturing, primarily applicable to manufacturing and processing industries. The seams of a mold cannot be perfectly smooth; there will be small gaps. When the part is produced, these gaps will have small edge protrusions, known as parting lines. Simply put, plastic parts need to be molded in several parts, which are then assembled to form a closed space; the lines between these parts are the parting lines.

[0003] For example, the patent publication number CN105945655A, "A Polishing Process for the Parting Line of the Front and Rear Molds of a Mobile Phone Battery Cover," includes the following steps: 1. Prepare a polishing machine; 2. Prepare a turntable; 3. Place two mobile phone battery covers to be polished on one of the processing positions; 4. Under the control of the controller, the motor drives two sponge grinding wheels to perform contour polishing on the mobile phone battery covers to be polished on the two processing positions, while two drip pipes continuously drip water to lubricate and cool the two sponge grinding wheels; 5. After the contour polishing is completed, rotate the turntable and remove the polished product.

[0004] However, in the existing technology, the upper and lower molds are joined together to form the cavity of the part to be prepared, and then the material is put into the cavity to form the part. Since there will inevitably be a certain error when the parting surfaces of the upper and lower molds are joined, a parting line will be generated at the junction of the two parting surfaces. When both parting surfaces are planes, the sharpness of the parting line is the greatest, and the part to be prepared is too easy to cut your hand because the parting line is too sharp. Summary of the Invention

[0005] The purpose of this invention is to provide a mold that avoids parting lines, thereby solving the problem mentioned in the background art that when both parting surfaces are planar, the resulting parting lines are the sharpest, and the manufactured parts are too easy to cut hands due to the excessively sharp parting lines.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a mold for avoiding part parting lines, comprising a mold shell mechanism, an upper cavity shell, and a lower cavity shell. The mold shell mechanism includes a top plate, an upper mold shell, and a lower mold shell. Cavities are formed on the bottom surface of the upper mold shell and the top surface of the lower mold shell. The upper cavity shell is disposed in the inner cavity of the bottom surface of the upper mold shell, and the lower cavity shell is disposed in the inner cavity of the top surface of the lower mold shell. An injection molding machine injects material into the cavities of the upper and lower cavity shells through an injection pipe, and uses pressure from above to connect the upper and lower cavity shells together. An injection pipe is fixedly connected to the center of the top plate, and the bottom end of the injection pipe communicates with the upper cavity shell. The bottom end of the upper cavity shell is bent outward to form an upper bent portion. The upper flat support is formed by horizontally unfolding the upper part, and the top of the lower cavity shell is bent outward to form a lower bent part. The top of the lower bent part is horizontally unfolded to form a lower flat support. A first seal is fixedly connected to the inner wall of the upper bent part, and a second seal is fixedly connected to the inner wall of the lower bent part. A parting diaphragm is connected between the first seal and the second seal. Both ends of the parting diaphragm are designed with outwardly protruding structural strips. The parting diaphragm is connected to one of the strips by a slot on the first seal and to the other strip by a slot on the second seal. Sufficient gaps are reserved between the first seal and the upper bent part, and sufficient gaps are also reserved between the second seal and the lower bent part. The parting diaphragm is inserted into the first seal or the second seal.

[0007] Both ends of the parting diaphragm are provided with locking strips. The first and second seals have corresponding slots inside. The surface of the first seal is in the same plane as the inner wall of the upper cavity shell, and the surface of the second seal is in the same plane as the inner wall of the lower cavity shell. Electromagnets are provided on the outer walls of the upper and lower bends. Magnets are fixedly connected inside the locking strips. When the locking strips pass through completely until they reach the slots, the electromagnets on the outer side of the upper bends apply a repulsive force to the parting diaphragm, so that the inner wall of the parting diaphragm fits tightly against the first seal, and the locking strips are fastened to the slots.

[0008] Preferably, an upper sealing plate and a lower sealing plate are provided below the lower mold shell, and a cover is fixedly connected between the upper sealing plate and the lower sealing plate.

[0009] Preferably, the top surface of the lower sealing plate is provided with a sealing mechanism, the sealing mechanism including a gas storage tank, and the bottom end of the gas storage tank is rotatably connected to a second bevel gear.

[0010] Preferably, the second bevel gear meshes with the first bevel gear on its outer side, a rocker arm is fixedly connected to one side of the first bevel gear, a rubber sleeve is fitted on the outer side wall of the rocker arm, and an inflation assembly is provided between the gas storage tank and the second bevel gear.

[0011] Preferably, the inflation assembly includes an air cylinder, which is connected to an air storage tank. A piston is slidably connected to the inner wall of the air cylinder, and a straight rod is fixedly connected to one side of the piston.

[0012] Preferably, one end of the straight rod is rotatably connected to a rotating rod, and one end of the rotating rod is rotatably connected to a positioning shaft, the positioning shaft being fixedly connected to the second bevel gear.

[0013] Preferably, the outer wall of the gas storage tank is connected to a gas guiding hose, the surface of the lower flat support is provided with an air passage, one end of the air passage is connected to the lower bend, the top end of the gas guiding hose is connected to the air passage, and the side walls of the upper bend and the lower bend are provided with side through holes.

[0014] Preferably, a top support mechanism is provided between the lower mold shell and the upper sealing plate. The top support mechanism includes a positioning cylinder and a sliding column. The top end of the positioning cylinder passes through the upper mold shell and the lower mold shell and is fixedly connected to the bottom surface of the top plate.

[0015] Preferably, the inner wall of the positioning cylinder is slidably connected to the outer wall of the sliding column, and a spring is provided on the outer side of the positioning cylinder. The spring force is used to make the upper mold shell and the lower mold shell tightly connected to each other. At the same time, the positioning cylinder is used to initially position the upper mold shell and the lower mold shell, so that the two cavities of the upper cavity shell and the lower cavity shell can correspond to each other.

[0016] Preferably, the top end of the spring is fixedly connected to the lower mold shell, the bottom end of the spring is fixedly connected to the upper sealing plate, and sealing rings are fixedly connected to the outer sides of both the upper and lower flat supports.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. In this invention, the bottom opening of the upper cavity shell and the top opening of the lower cavity shell are flipped outward to form a bent portion. A first sealing strip and a second sealing strip are respectively set on the inner side of the upper and lower bent portions. The upper and lower bent portions are connected to each other using a tough parting diaphragm. When the upper mold and the lower mold are aligned, the curvature of the parting diaphragm connection point changes accordingly. The parting diaphragm is tightly attached to the sealing strip by the magnetic repulsion of an electromagnet and a magnet, so that the upper cavity shell, the lower cavity shell, the two sealing strips and the parting diaphragm form a continuous arc surface, thereby reducing the sharpness of the parting line and making the parting line of the molded part smoother. This solves the problem of the parting line cutting the hand due to the misalignment of the parting surfaces of the two molds.

[0019] 2. In this invention, rotating the hand crank drives the first bevel gear to rotate, which in turn drives the second bevel gear to rotate, thereby adjusting the position of the three positioning shafts. The positioning shafts drive the rotating rod to move. Since the other end of the rotating rod is connected to the straight rod, when the second bevel gear rotates, it drives the three straight rods to translate along the axis of the air cylinder. This causes the straight rod to drive the piston to contract towards the center and increases the air pressure in the air tank. As the air pressure inside the air tank rises, the air tank discharges gas into the air passage through the air guide hose. The gas is discharged from the air passage into the periphery of the parting diaphragm. The increased air pressure on the periphery of the parting diaphragm causes the parting diaphragm to snap inward, reducing the lines caused by gap differences and further ensuring that the parting line of the part is in a smooth state.

[0020] 3. In this invention, when a high-pressure environment is provided to the outside of the parting diaphragm by rotating the handle, the pressure on the outside of the parting diaphragm is increased by continuous rotation, thereby squeezing the parting diaphragm inward, thereby extending the bending range of the parting diaphragm, increasing the curvature of the parting diaphragm, making the parting line of the produced part smoother, and also keeping the outside of the part smooth.

[0021] 4. In this invention, a high-pressure environment is provided to the outside of the parting diaphragm by rotating the crank handle. After the gas is introduced into the periphery of the parting diaphragm, the gas concentration is effectively increased, which improves the heat exchange efficiency between the parting diaphragm and the external environment. This reduces the cooling and forming time of the internal parts and speeds up the forming effect of the parts. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a mold for avoiding part parting lines according to the present invention;

[0023] Figure 2 This is a schematic diagram of the internal structure of a mold for avoiding part parting lines according to the present invention;

[0024] Figure 3 This is a schematic cross-sectional view of a mold for avoiding part parting lines according to the present invention.

[0025] Figure 4 This is a partial structural disassembly diagram illustrating the invention of a mold that avoids part parting lines.

[0026] Figure 5 This is a schematic diagram of a sealing mechanism in a mold that avoids part parting lines according to the present invention.

[0027] Figure 6 This is a partial structural disassembly diagram of the upper and lower cavity shells in a mold for avoiding part parting lines according to the present invention.

[0028] Figure 7 This is a cross-sectional view of the parting diaphragm in a mold for avoiding part parting lines according to the present invention.

[0029] Figure 8 This is a partial cross-sectional schematic diagram of the upper and lower cavity shells in a mold for avoiding part parting lines according to the present invention.

[0030] Figure 9 For the present invention Figure 8 Enlarged view of the local structure at point A;

[0031] Figure 10 This is a diagram illustrating the forming effect of a part in a mold where the upper and lower cavities are misaligned, thus avoiding the part parting line, according to the present invention.

[0032] In the diagram: 1. Mold shell mechanism; 11. Top plate; 12. Upper mold shell; 13. Lower mold shell; 14. Upper sealing plate; 15. Cover shell; 16. Lower sealing plate; 2. Top support mechanism; 21. Positioning cylinder; 22. Spring; 23. Sliding column; 3. Parting diaphragm; 30. Locking strip; 4. Injection pipe; 5. Sealing mechanism; 51. Rocker arm; 52. First bevel gear; 53. Second bevel gear; 54. Inflation assembly; 541. Piston; 542. Straight rod; 543. Air cylinder; 544. Rotating rod; 545. Positioning shaft; 55. Air tank; 56. Air guide hose; 6. Upper cavity shell; 61. Upper flat support; 62. Upper bending part; 63. First seal; 7. Lower cavity shell; 71. Lower flat support; 72. Lower bending part; 73. Second seal; 74. Air passage; 8. Side through hole. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1

[0035] according to Figure 1-10As shown: A mold for avoiding part parting lines includes a mold shell mechanism 1, an upper cavity shell 6, and a lower cavity shell 7. The mold shell mechanism 1 includes a top plate 11, an upper mold shell 12, and a lower mold shell 13. Cavities are formed on the bottom surface of the upper mold shell 12 and the top surface of the lower mold shell 13. The upper cavity shell 6 is disposed in the inner cavity of the bottom surface of the upper mold shell 12, and the lower cavity shell 7 is disposed in the inner cavity of the top surface of the lower mold shell 13. An injection pipe 4 is fixedly connected to the center of the top plate 11, and the bottom end of the injection pipe 4 communicates with the upper cavity shell 6. The bottom end of the cavity shell 6 is bent outward to form an upper bent portion 62, and the bottom end of the upper bent portion 62 is extended horizontally to form an upper flat support portion 61. The top end of the lower cavity shell 7 is bent outward to form a lower bent portion 72, and the top end of the lower bent portion 72 is extended horizontally to form a lower flat support portion 71. A first seal 63 is fixedly connected to the inner wall of the upper bent portion 62, and a second seal 73 is fixedly connected to the inner wall of the lower bent portion 72. A parting diaphragm 3 is connected between the first seal 63 and the second seal 73.

[0036] Both ends of the parting diaphragm 3 are provided with locking strips 30. The first seal 63 and the second seal 73 are provided with locking grooves corresponding to the locking strips 30. The surface of the first seal 63 is in the same plane as the inner wall of the upper cavity shell 6, and the surface of the second seal 73 is in the same plane as the inner wall of the lower cavity shell 7. Electromagnets are provided on the outer walls of the upper bend 62 and the lower bend 72. A magnet is fixedly connected inside the locking strip 30.

[0037] In this embodiment, during use, the injection molding equipment injects material into the chambers of the upper cavity shell 6 and the lower cavity shell 7 through the injection tube 4. The upper cavity shell 6 and the lower cavity shell 7 are connected to each other from above using pressure. When the upper cavity shell 6 and the lower cavity shell 7 are connected, the parting surfaces of the two inner walls inevitably have a certain deviation. Using a flat parting surface will inevitably produce a parting line due to misalignment. The bottom opening of the upper cavity shell 6 and the top opening of the lower cavity shell 7 are both designed to be bent outwards, so that the parting line of the part is treated as two inclined surfaces, increasing the intersection of the upper mold and the lower mold, reducing the sharpness of the parting line, and avoiding the parting line generated by the intersection of straight surfaces being too sharp and easy to cut hands;

[0038] In addition, a parting diaphragm 3 is installed at the intersection of the upper cavity shell 6 and the lower cavity shell 7. The parting diaphragm 3 is made of a material with certain structural strength and toughness. At the junction of the parting diaphragm 3 and the upper bending part 62, it is connected by a first seal 63. The surface of the first seal 63 is arc-shaped, and the first seal 63, together with the surfaces of the upper cavity shell 6 and the parting diaphragm 3, forms a continuous arc surface. Similarly, the second seal 73 connects the surfaces of the lower cavity shell 7 and the parting diaphragm 3 into an arc surface, causing the surface of the parting diaphragm 3 to deform outward. The lateral arching utilizes the shaping effect of the parting diaphragm 3 on the outer side to smooth the junction of the upper flat support 61 and the lower flat support 71 into a rounded corner, further reducing the sharpness of the parting line. At the same time, as the degree of misalignment between the upper cavity shell 6 and the lower cavity shell 7 varies, the parting diaphragm 3 is subjected to different forces from the upper bending part 62 and the lower bending part 72. Therefore, the arching direction and amplitude of the parting diaphragm 3 also change accordingly, so that the misalignment of the upper cavity shell 6 and the lower cavity shell 7 to a certain extent can be mitigated by the parting diaphragm 3 to reduce the sharpness of the parting line.

[0039] To reduce the gap when the parting diaphragm 3 is connected to the first seal 63 and the second seal 73, outwardly protruding structural retaining strips 30 are designed at both ends of the parting diaphragm 3. The first seal 63 connects to one of the retaining strips 30 via a slot, and the second seal 73 connects to the other retaining strip 30 via a slot. Sufficient gaps are reserved between the first seal 63 and the upper bend 62, and also between the second seal 73 and the lower bend 72. The parting diaphragm 3 is then inserted... When the first seal 63 or the second seal 73 is inserted, the space between the upper bend 62 and the first seal 63 is sufficient for the clip 30 to pass through. When the clip 30 has completely passed through and reached the slot, the electromagnet on the outside of the upper bend 62 applies a repulsive force to the parting diaphragm 3, so that the inner wall of the parting diaphragm 3 is tightly fitted with the first seal 63, and the clip 30 is tightly fastened to the slot, preventing material from flowing into the gap between the parting diaphragm 3 and the first seal 63, and improving the flatness around the parting line.

[0040] Example 2

[0041] according to Figure 3 , Figure 4 and Figure 5As shown, an upper sealing plate 14 and a lower sealing plate 16 are provided below the lower mold shell 13, and a cover 15 is fixedly connected between the upper sealing plate 14 and the lower sealing plate 16. A sealing mechanism 5 is provided on the top surface of the lower sealing plate 16. The sealing mechanism 5 includes an air storage tank 55, and a second bevel gear 53 is rotatably connected to the bottom end of the air storage tank 55. A first bevel gear 52 meshes with the outer side of the second bevel gear 53. A rocker arm 51 is fixedly connected to one side of the first bevel gear 52. A rubber sleeve is provided on the outer wall of the rocker arm 51. An inflation assembly 54 is provided between the air storage tank 55 and the second bevel gear 53. The inflation assembly 54 includes an air cylinder 543, which communicates with the air storage tank 55. A piston 541 is slidably connected to the inner wall of the air cylinder 543, and a straight rod 542 is fixedly connected to one side of the piston 541. One end of the straight rod 542 is rotatably connected to a rotating rod 544, and one end of the rotating rod 544 is rotatably connected to a positioning shaft 545. The positioning shaft 545 is fixedly connected to the second bevel gear 53. The outer wall of the gas storage tank 55 is connected to a gas guide hose 56. An air passage 74 is opened on the surface of the lower flat support 71. One end of the air passage 74 is connected to the lower bend 72. The top end of the gas guide hose 56 is connected to the air passage 74. Side through holes 8 are opened on the side walls of both the upper bend 62 and the lower bend 72.

[0042] In this embodiment, in order to further reduce the gap between the parting diaphragm 3 and the first seal 63 and the second seal 73 during the connection process, after the upper mold shell 12 and the lower mold shell 13 are connected, the upper flat support 61 and the lower flat support 71 are completely attached to form a sealed space. The rocker arm 51 is rotated on the outside of the cover 15, so that the rocker arm 51 drives the first bevel gear 52 to rotate, and the first bevel gear 52 drives the second bevel gear 53 to rotate. During the rotation of the second bevel gear 53, the positions of the three positioning shafts 545 on the second bevel gear 53 also change accordingly. At the same time, the positioning shafts 545 will also drive the rotating rod 544 to move. Since the other end of the rotating rod 544 is connected to the straight rod 542, when the second bevel gear 53 rotates, it drives the three straight rods 542 to translate on the axis of the air cylinder 543, causing the straight rods 542 to drive the piston 541 to contract towards the center and increase the air pressure in the air tank 55.

[0043] As the internal air pressure of the gas tank 55 increases, the gas tank 55 discharges gas into the air passage 74 through the air guide hose 56. The gas is discharged from the air passage 74 into the periphery of the parting diaphragm 3. The increased air pressure on the periphery of the parting diaphragm 3 causes the parting diaphragm 3 to snap inward, making the parting diaphragm 3 more closely adhered to the first seal 63 and the second seal 73. During the process of the parting diaphragm 3 adhering inward, the gas in the first seal 63 and the second seal 73 will also be discharged from the side through hole 8, so that a negative pressure state is formed on the inside of the parting diaphragm 3, making the parting diaphragm 3 adhere more tightly to the first seal 63 and the second seal 73. In addition, when the air pressure on the periphery of the parting diaphragm 3 increases, it further compresses the parting diaphragm 3, causing the parting diaphragm 3 to be squeezed inward, thereby extending the bending range of the parting diaphragm 3 and increasing the curvature of the parting diaphragm 3, making the parting line of the produced parts smoother.

[0044] Finally, introducing gas into the periphery of the parting diaphragm 3 effectively increases the gas concentration, thereby improving the heat exchange efficiency between the parting diaphragm 3 and the external environment, thus reducing the cooling and forming time of the internal parts and accelerating the forming effect of the parts.

[0045] Example 3

[0046] according to Figure 1 , Figure 2 and Figure 3 As shown, a top support mechanism 2 is provided between the lower mold shell 13 and the upper sealing plate 14. The top support mechanism 2 includes a positioning cylinder 21 and a sliding column 23. The top end of the positioning cylinder 21 passes through the upper mold shell 12 and the lower mold shell 13 and is fixedly connected to the bottom surface of the top plate 11. The inner side wall of the positioning cylinder 21 is slidably connected to the outer side wall of the sliding column 23. A spring 22 is provided on the outer side of the positioning cylinder 21. The top end of the spring 22 is fixedly connected to the lower mold shell 13, and the bottom end of the spring 22 is fixedly connected to the upper sealing plate 14. Sealing rings are fixedly connected to the outer sides of both the upper flat support part 61 and the lower flat support part 71.

[0047] In this embodiment, a top support mechanism 2 is provided between the lower mold shell 13 and the upper sealing plate 14. When the injection molding equipment is connected to the injection tube 4, pressure is applied, and the lower mold shell 13 moves closer to the upper sealing plate 14. The elastic force of the spring 22 makes the upper mold shell 12 and the lower mold shell 13 tightly connected to each other. At the same time, the positioning cylinder 21 is used to initially position the upper mold shell 12 and the lower mold shell 13, so that the two cavities of the upper cavity shell 6 and the lower cavity shell 7 can correspond to each other. When it is necessary to demold the internal parts, the upper mold shell 12 can be quickly separated from the lower mold shell 13. At this time, the spring 22 is in a free unfolded state so that a docking injection molding production can be carried out during the subsequent part molding.

[0048] The usage method and working principle of this device are as follows: First, connect the injection head of the injection molding equipment with the top opening of the injection tube 4. Insert the retaining strip 30 at the lower end of the parting film 3 into the gap of the second seal 73. Insert the retaining strip 30 at the upper end of the parting film 3 into the gap of the first seal 63. Use the electromagnet on the outside of the upper bend 62 to apply a repulsive force to the parting film 3, so that the inner wall of the parting film 3 is tightly attached to the first seal 63, and the retaining strip 30 is tightly fastened to the retaining groove.

[0049] Then, the mold shell mechanism 1 is pressed downward by hydraulic cylinders and other driving components, and the upper cavity shell 6 and the lower cavity shell 7 are connected to each other by pressure until the upper flat support 61 and the lower flat support 71 are completely attached to form a sealed space.

[0050] Subsequently, the rocker arm 51 is rotated on the outside of the cover 15, causing the rocker arm 51 to drive the first bevel gear 52 to rotate, and the first bevel gear 52 to drive the second bevel gear 53 to rotate. During the rotation of the second bevel gear 53, the positions of the three positioning shafts 545 on the second bevel gear 53 also change accordingly. At the same time, the positioning shafts 545 will also drive the rotating rod 544 to move. Since the other end of the rotating rod 544 is connected to the straight rod 542, the rotation of the second bevel gear 53 drives the three straight rods 542 to translate on the axis of the air cylinder 543, causing the straight rods 542 to drive the piston 541 to contract towards the center, thereby increasing the air pressure in the air tank 55.

[0051] As the internal air pressure of the gas storage tank 55 increases, the gas storage tank 55 discharges gas into the air passage 74 through the air guide hose 56. The gas is discharged from the air passage 74 into the periphery of the parting diaphragm 3. The increased air pressure on the periphery of the parting diaphragm 3 causes the parting diaphragm 3 to snap inward, making the parting diaphragm 3 further adhere to the first seal 63 and the second seal 73.

[0052] Finally, the first seal 63, together with the surfaces of the upper cavity shell 6 and the parting diaphragm 3, forms a continuous arc surface. Similarly, the second seal 73 connects the surfaces of the lower cavity shell 7 and the parting diaphragm 3 into an arc surface. The surface of the parting diaphragm 3 deforms and arches outward. The shaping effect of the parting diaphragm 3 on the outside smooths the junction of the upper flat support 61 and the lower flat support 71 into a smooth rounded corner. Material is injected into the injection tube 4 using injection molding equipment until the part is fully formed. The sharpness of the parting line is reduced by the action of the parting diaphragm 3. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mold for avoiding part parting lines, comprising a mold shell mechanism (1), an upper cavity shell (6), and a lower cavity shell (7), wherein the mold shell mechanism (1) comprises a top plate (11), an upper mold shell (12), and a lower mold shell (13), wherein cavities are formed on the bottom surface of the upper mold shell (12) and the top surface of the lower mold shell (13), the upper cavity shell (6) is disposed in the inner cavity of the bottom surface of the upper mold shell (12), and the lower cavity shell (7) is disposed in the inner cavity of the top surface of the lower mold shell (13), wherein an injection tube (4) is fixedly connected at the center of the top plate (11), and the bottom end of the injection tube (4) communicates with the upper cavity shell (6), characterized in that: The bottom end of the upper cavity shell (6) is bent outward to form an upper bent portion (62), and the bottom end of the upper bent portion (62) is unfolded horizontally to form an upper flat support portion (61). The top end of the lower cavity shell (7) is bent outward to form a lower bent portion (72), and the top end of the lower bent portion (72) is unfolded horizontally to form a lower flat support portion (71). A first seal (63) is fixedly connected to the inner wall of the upper bent portion (62), and a second seal (73) is fixedly connected to the inner wall of the lower bent portion (72). A parting diaphragm (3) is connected between the first seal (63) and the second seal (73). Both ends of the split diaphragm (3) are provided with a locking strip (30). The first seal (63) and the second seal (73) are provided with a locking groove corresponding to the locking strip (30). The surface of the first seal (63) is in the same plane as the inner wall of the upper cavity shell (6). The surface of the second seal (73) is in the same plane as the inner wall of the lower cavity shell (7). The outer walls of the upper bend (62) and the lower bend (72) are provided with an electromagnet. The inside of the locking strip (30) is fixedly connected with a magnet. When the card strip (30) passes through completely until it reaches the card slot, the electromagnet on the outside of the upper bend (62) applies a repulsive force to the parting diaphragm (3), so that the inner wall of the parting diaphragm (3) fits tightly with the first seal (63), and the card strip (30) is fastened to the card slot.

2. The mold for avoiding part parting lines according to claim 1, characterized in that: The lower mold shell (13) is provided with an upper sealing plate (14) and a lower sealing plate (16), and a cover (15) is fixedly connected between the upper sealing plate (14) and the lower sealing plate (16).

3. A mold for avoiding part parting lines according to claim 2, characterized in that: The top surface of the lower sealing plate (16) is provided with a sealing mechanism (5), the sealing mechanism (5) includes a gas storage tank (55), and the bottom end of the gas storage tank (55) is rotatably connected to a second bevel gear (53).

4. A mold for avoiding part parting lines according to claim 3, characterized in that: The second bevel gear (53) is meshed with the first bevel gear (52) on its outer side. A rocker arm (51) is fixedly connected to one side of the first bevel gear (52). A rubber sleeve is provided on the outer side wall of the rocker arm (51). An inflation assembly (54) is provided between the gas tank (55) and the second bevel gear (53).

5. A mold for avoiding part parting lines according to claim 4, characterized in that: The inflation assembly (54) includes an air cylinder (543) which is connected to an air tank (55). A piston (541) is slidably connected to the inner wall of the air cylinder (543), and a straight rod (542) is fixedly connected to one side of the piston (541).

6. A mold for avoiding part parting lines according to claim 5, characterized in that: One end of the straight rod (542) is rotatably connected to a rotating rod (544), and one end of the rotating rod (544) is rotatably connected to a positioning shaft (545). The positioning shaft (545) is fixedly connected to the second bevel gear (53).

7. A mold for avoiding part parting lines according to claim 6, characterized in that: The outer wall of the gas storage tank (55) is connected to a gas guide hose (56). The surface of the lower flat support (71) is provided with an air passage (74). One end of the air passage (74) is connected to the lower bend (72). The top end of the gas guide hose (56) is connected to the air passage (74). The side walls of the upper bend (62) and the lower bend (72) are provided with side through holes (8).

8. A mold for avoiding part parting lines according to claim 1, characterized in that: A top support mechanism (2) is provided between the lower mold shell (13) and the upper sealing plate (14). The top support mechanism (2) includes a positioning cylinder (21) and a sliding column (23). The top end of the positioning cylinder (21) passes through the upper mold shell (12) and the lower mold shell (13) and is fixedly connected to the bottom surface of the top plate (11).

9. A mold for avoiding part parting lines according to claim 8, characterized in that: The inner wall of the positioning cylinder (21) is slidably connected to the outer wall of the sliding column (23), and a spring (22) is provided on the outer side of the positioning cylinder (21).

10. A mold for avoiding part parting lines according to claim 9, characterized in that: The top end of the spring (22) is fixedly connected to the lower mold shell (13), the bottom end of the spring (22) is fixedly connected to the upper sealing plate (14), and the outer sides of the upper flat support (61) and the lower flat support (71) are both fixedly connected with sealing rings.

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