Injection mold

Abstract

An injection mold comprises a movable mold set, a fixed mold set and a core pulling device, at least two mold cavities are formed between the movable mold set and the fixed mold set, and the core pulling device comprises a core pulling rod penetrating through the at least two mold cavities and a sliding block used for driving the core pulling rod to move between a mold closing position and a mold opening position. The core-pulling rod is provided with at least two forming parts, the at least two forming parts correspond to the at least two mold cavities respectively, when the core-pulling rod moves to the mold closing position, the at least two forming parts move into the corresponding mold cavities respectively to be used for forming products, and when the core-pulling rod moves to the mold opening position, the at least two forming parts move into the corresponding mold cavities to be used for forming the products. The at least two forming parts are arranged on the core pulling rod of the core pulling device, the at least two forming parts are inserted into the corresponding cavities to be used for forming the switch buttons, and therefore the core pulling device can be matched with the at least two cavities at the same time to be used for forming the products. The production efficiency is higher, and the operation is convenient.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, and particularly relates to an injection mold. Background Art

[0002] A mold is a basic process equipment in the manufacturing industry. Its function is to control and restrict the flow of materials (solid or liquid) so as to form the required shape. Manufacturing parts with molds is widely used in the manufacturing industry due to its high efficiency, good product quality, low material consumption and low production cost. The design and manufacturing technology of molds will directly determine the quality, efficiency and diversity development of new products.

[0003] Achieving "high quality, high efficiency and low consumption" in injection production is the goal pursued by each enterprise. Determining the number of cavities in an injection mold is an important link in the structural design of the injection mold. The determination of the number of cavities is restricted by many factors. Reasonably determining the number of cavities is a prerequisite for ensuring the quality of plastic parts, reducing production costs and giving full play to the production potential of equipment.

[0004] Switch buttons are widely used in the structures of various products. Usually, high precision is required for the shaft structure of the switch buttons, without burrs, and the demand is large. Therefore, high requirements are also placed on the precision, quality and production capacity of the switch button molds. However, there are certain defects in the existing mold structures and they cannot meet the high requirements such as high precision, stable production, large production capacity, efficient and convenient processing and assembly, and reasonable arrangement of the mold space at the same time. Summary of the Invention

[0005] The purpose of the utility model is to overcome at least one defect of the prior art and provide an injection mold.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] An injection mold includes a moving mold set, a fixed mold set and a core-pulling device. There are at least two cavities between the moving mold set and the fixed mold set. The core-pulling device includes a core-pulling rod passing through at least two of the cavities, and a slider for driving the core-pulling rod to move between a mold-closing position and a mold-opening position. The core-pulling rod is provided with at least two forming parts, and the at least two forming parts correspond to the at least two cavities respectively. When the core-pulling rod moves to the mold-closing position, the at least two forming parts respectively move into the corresponding cavities to form products. When the core-pulling rod moves to the mold-opening position, the at least two forming parts respectively leave the corresponding cavities and separate from the formed products.

[0008] Preferably, the core-pulling rod includes a connecting portion connected between two adjacent forming portions, and an avoidance structure is provided on the connecting portion. When at least one forming portion leaves the corresponding cavity, the connecting portion moves to the position where the original forming portion was located in the cavity, and the product is avoided through the avoidance structure on the connecting portion, enabling the product to leave the cavity along the mold-opening direction.

[0009] Preferably, the forming portion includes a first forming portion and a forming groove for forming a reverse buckle of a rotating shaft, and the first forming portion is located in the mold-opening direction of the forming groove.

[0010] Preferably, the width of the connecting portion is smaller than that of the forming portion, and avoidance surfaces serving as avoidance structures are respectively provided on two opposite sides of the connecting portion, and the avoidance surfaces are arranged parallel to the mold-opening direction.

[0011] Preferably, a first convex platform and a second convex platform are respectively provided on two opposite sides of the forming portion. The first convex platform cooperates with the cavity, the second convex platform cooperates with the movable mold insert, and a forming groove for forming a reverse buckle of a rotating shaft is provided between the first convex platform and the second convex platform.

[0012] Preferably, a limiting portion is provided at the end of the core-pulling rod away from the slider, and a limiting hole for inserting and limiting cooperation with the limiting portion is provided in the movable mold set. Avoidance surfaces serving as avoidance structures are respectively provided on two opposite sides of the limiting portion.

[0013] Preferably, a movable mold core and a fixed mold core are respectively provided in the movable mold set and the fixed mold set. A plurality of movable mold inserts are provided in the movable mold core, and corresponding core-pulling devices are respectively provided on the plurality of movable mold inserts. Each movable mold insert is provided with two movable mold cavities. The fixed mold core is respectively provided with two fixed mold cavities corresponding to each movable mold insert. The two fixed mold cavities and the two movable mold cavities on the corresponding movable mold insert form two said cavities. The core-pulling rod is provided with two forming portions, and the two forming portions respectively correspond to the two movable mold cavities of the corresponding movable mold insert.

[0014] Preferably, an embedded insert for forming a movable mold cavity is provided in the movable mold insert. The embedded insert is perpendicular to the core-pulling rod. A insert hole for passing through the core-pulling rod is provided on the embedded insert. When the core-pulling rod moves to the mold-closing position, the forming portion of the core-pulling rod passes through the insert hole, and both ends of the forming portion are oppositely arranged on both sides of the embedded insert, and the cavity is formed by both ends of the forming portion. When the core-pulling rod moves to the mold-opening position, the connecting portion of the core-pulling rod passes through the insert hole, and both ends of the connecting portion are oppositely arranged on both sides of the embedded insert, and the formed product is avoided through the avoidance structure on the connecting portion.

[0015] Preferably, ejector rods are respectively provided on two opposite sides of the embedded insert. The two ejector rods on both sides of the embedded insert are respectively inserted into the movable mold insert. The ejector rods are used for forming a movable mold cavity during mold closing and for driving the product to move along the mold-opening direction during mold opening.

[0016] Preferably, it includes two core-pulling devices arranged oppositely, and two movable mold inserts are arranged between the two core-pulling devices. The two movable mold inserts correspond to the two core-pulling devices respectively. When the core-pulling rods move towards the mold-closing position, the core-pulling rods of the two opposite core-pulling devices move closer to each other. When the core-pulling rods move towards the mold-opening position, the core-pulling rods of the two opposite core-pulling devices move away from each other.

[0017] Preferably, it includes two rows of insert row combinations arranged side by side. Each of the two rows of insert row combinations includes a plurality of movable mold inserts arranged in the width direction. The plurality of movable mold inserts of the two rows of insert row combinations correspond to each other respectively, and the two corresponding movable mold inserts are arranged oppositely in the length direction. Core-pulling row combinations are respectively arranged on the sides of the two rows of insert row combinations that are away from each other. The core-pulling row combination includes a plurality of core-pulling devices that respectively correspond to the movable mold inserts of the adjacent insert row combination, and the plurality of core-pulling devices of the core-pulling row combination are arranged in the width direction of the movable mold inserts.

[0018] Preferably, it includes two insert array combinations. Each of the two insert array combinations includes four movable mold inserts. The two insert array combinations are arranged oppositely on both sides of the main runner. The insert array combination includes two first inserts arranged in the length direction, and two embedded inserts respectively arranged on the sides of the first inserts in the width direction. Core-pulling devices are arranged on the sides of the two first inserts that are away from each other, and on the sides of the two embedded inserts that are away from each other.

[0019] Preferably, a first runner communicating with the main runner is arranged between the two first inserts. One end of the first runner away from the main runner communicates with two second runners. The two second runners are arranged oppositely on both sides of the first runner. One ends of the two second runners away from the first runner are respectively located between the two first inserts and the adjacent embedded inserts. The two second runners respectively communicate with two third runners. The two third runners are arranged oppositely on both sides of the second runner. Fourth runners communicating with the third runners are respectively arranged on the first inserts and the embedded inserts, and two fifth runners respectively communicating with the fourth runners are arranged. The fourth runner is located between the two cavities. The two fifth runners are arranged oppositely on both sides of the fourth runner and respectively communicate between the two cavities and the fourth runner.

[0020] Preferably, the fifth runner includes a first branch channel arranged parallel to the fourth runner. The middle of the first branch channel communicates with the fourth runner. The sides of the first branch channel away from the fourth runner respectively communicate with two second branch channels. The sides of the two second branch channels away from the first branch channel respectively communicate with the same cavity. The positions where the two second branch channels respectively communicate with the cavity form gates.

[0021] Preferably, the first runner, the second runner, and the third runner are composed of the movable mold core and the fixed mold core. The fourth runner and the fifth runner are composed of the movable mold insert and the fixed mold core.

[0022] Preferably, the core-pulling device includes a cam pin and a lifter base respectively connected to the fixed template, and two pressure bars respectively connected to the moving template. The two pressure bars are oppositely arranged on both sides of the slider for restricting the slider to move only in the core-pulling direction. The cam pin is arranged at an oblique angle to the core-pulling direction. The cam pin is used to drive the slider to move during mold opening, so that the core-pulling rod moves from the mold-closing position to the mold-opening position. The lifter base is used to drive the slider to move during mold closing, so that the core-pulling rod moves from the mold-opening position to the mold-closing position.

[0023] Preferably, at least two core-pulling rods are arranged on the slider, and the slider can simultaneously drive at least two core-pulling rods to move between the mold-opening position and the mold-closing position.

[0024] Preferably, at least two slider inserts are arranged on the slider, and the core-pulling rods are arranged on the at least two slider inserts.

[0025] Preferably, an anti-collision spring is arranged on the side of the slider away from the lifter base.

[0026] Preferably, the fixed mold set includes a fixed mold base plate, a fixed template and a fixed mold core, and the moving mold set includes a moving mold base plate, mold feet, a moving template and a moving mold core.

[0027] Preferably, the moving direction of the core-pulling rod is perpendicular to the demolding direction.

[0028] In the injection mold of the present utility model, by providing at least two forming parts on the core-pulling rod of the core-pulling device, and inserting the at least two forming parts into the corresponding cavities respectively for forming the switch button, the core-pulling device can cooperate with at least two cavities simultaneously for forming products, which not only has higher production efficiency but also is convenient to operate.

[0029] In addition, the injection mold of this embodiment can meet high requirements such as high precision, stable production, large production capacity, and efficient and convenient processing and assembly through reasonable layout of the mold space.

[0030] In addition, when the forming part leaves the corresponding cavity, the connecting part adjacent to the forming part can move into the cavity. The avoidance structure is used to avoid the product, so that the product can leave the cavity along the demolding direction. Even if the core-pulling rod does not completely leave the cavity, it can ensure the smooth demolding of the product. By the avoidance structure on the connecting part, the stroke of each action of the core-pulling rod can be shortened, and it is not necessary to completely pass through and leave multiple cavities every time. Description of the Drawings

[0031] Figure 1 is a schematic structural diagram of the switch button formed by the injection mold of the present utility model;

[0032] Figures 2-3These are sectional views of two mutually perpendicular cross-sections of the injection mold of the present utility model;

[0033] Figure 4 These are schematic diagrams of the cooperation of the movable mold insert, the inserted insert, and the core-pulling rod of the present utility model;

[0034] Figure 5 These are schematic diagrams of the cooperation of the inserted insert and the core-pulling rod of the present utility model;

[0035] Figure 6 These are schematic diagrams of the structure of the core-pulling rod of the present utility model;

[0036] Figures 7-8 These are schematic diagrams of the structure of the movable mold core and the movable mold insert of the present utility model;

[0037] Figure 9 These are schematic diagrams of the structure of the core-pulling device of the present utility model;

[0038] In the figure, 1 is the switch button; 11 is the side plate; 12 is the rotating shaft structure; 13 is the rotating shaft reverse buckle; 14 is the rotating shaft groove; 2 is the movable mold group; 3 is the fixed mold group; 4 is the core-pulling device; 5 is the cavity; 41 is the core-pulling rod; 42 is the slider; 43 is the forming part; 21 is the movable mold insert; 31 is the fixed mold base plate; 32 is the fixed template; 33 is the fixed mold core; 22 is the movable mold base plate; 23 is the mold foot; 24 is the movable template; 25 is the movable mold core; 210 is the movable mold cavity; 330 is the fixed mold cavity; 44 is the connecting part; 431 is the first boss; 432 is the second boss; 434 is the forming groove; 45 is the limiting part; 26 is the inserted insert; 27 is the insert hole; 28 is the ejector rod; 61 is the insert row combination; 62 is the core-pulling row combination; 7 is the insert array combination; 8 is the main runner; 71 is the first insert; 72 is the second insert; 81 is the first runner; 82 is the second runner; 83 is the third runner; 84 is the fourth runner; 85 is the fifth runner; 851 is the first branch runner; 852 is the second branch runner; 46 is the inclined guide post; 47 is the lifter base; 48 is the pressure strip; 49 is the slider insert; 400 is the anti-collision spring. Specific Embodiments

[0039] The following embodiments given in conjunction with the accompanying drawings further illustrate the specific embodiments of the injection mold of the present utility model. The injection mold of the present utility model is not limited to the description of the following embodiments.

[0040] As Figure 1 shown, the injection mold of this embodiment is used to mold the switch button 1. The switch button 1 includes two side plates 11 arranged oppositely. One ends of the two side plates 11 are both connected to the button top plate. The other ends of the two side plates 11 are respectively provided with U-shaped rotating shaft structures 12. Each of the two rotating shaft structures 12 includes two rotating shaft reverse buckles 13 arranged oppositely, and a rotating shaft groove 14 is provided between the two rotating shaft reverse buckles 13.

[0041] As Figures 2-5 shown, the injection mold of this embodiment includes a moving mold unit 2, a fixed mold unit 3, and a core-pulling device 4. At least two cavities 5 for molding the switch button 1 are provided between the moving mold unit 2 and the fixed mold unit 3. The core-pulling device 4 includes a core-pulling rod 41 passing through at least two of the cavities 5, and a slider 42 for driving the core-pulling rod 41 to move between a mold-closing position and a mold-opening position. At least two forming portions 43 are provided on the core-pulling rod 41, and the at least two forming portions 43 respectively correspond to the at least two cavities 5. When the core-pulling rod 41 moves to the mold-closing position, the at least two forming portions 43 respectively move into the corresponding cavities 5 to form the rotating shaft structure 12 of the switch button 1. When the core-pulling rod 41 moves to the mold-opening position, the at least two forming portions 43 respectively leave the corresponding cavities 5 and are separated from the molded switch button 1 in the cavities 5.

[0042] In the injection mold of this embodiment, by providing at least two forming portions 43 on the core-pulling rod 41 of the core-pulling device 4, and the at least two forming portions 43 are respectively inserted into the corresponding cavities 5 for molding the switch button 1, the core-pulling device 4 can cooperate with at least two cavities 5 at the same time for molding products, which not only has higher production efficiency but also is convenient to operate.

[0043] As Figures 2-3 shown, the fixed mold unit 3 includes a fixed mold base plate 31, a fixed template 32, and a fixed mold core 33. The moving mold unit 2 includes a moving mold base plate 22, mold feet 23, a moving template 24, and a moving mold core 25. The moving mold core 25 is provided with eight moving mold inserts 21.

[0044] As Figures 7-8As shown in the figure, in this embodiment, the moving die module 2 is provided with eight moving die inserts 21. Each moving die insert 21 is used to form two cavities 5. Corresponding to the eight moving die inserts 21, eight sets of core-pulling devices 4 are provided. Each set of core-pulling devices 4 is provided with a core-pulling rod 41. The core-pulling rods 41 of two adjacent core-pulling devices 4 share a slider 42. Each core-pulling rod 41 of each core-pulling device 4 is provided with two forming parts 43. The core-pulling rod 41 is inserted into the corresponding moving die insert 21 to form two switch buttons 1. Each of the eight moving die inserts 21 is provided with two moving die cavities 210. The fixed die core 33 is provided with two fixed die cavities 330 corresponding to each moving die insert 21. The corresponding moving die cavity 210 and fixed die cavity 330 form a cavity 5 for forming the switch button 1, so that each moving die insert 21 forms two switch buttons 1 at the same time. The number of the core-pulling devices 4 is equal to the number of the moving die inserts 21. Eight moving die inserts 21 are respectively provided with a set of core-pulling devices 4, that is, eight sets of core-pulling devices 4 are provided, with a total of eight core-pulling rods 41. The core-pulling rod 41 is provided with two forming parts 43. The core-pulling device 4 and the moving die insert 21 cooperate to form two switch buttons 1 in the corresponding moving die insert 21. When the core-pulling rod 41 moves to the mold closing position, the two forming parts 43 respectively move to the two moving die cavities 210 of the corresponding moving die insert 21, and are respectively used to form the rotating shaft structure 12 of the switch button 1. When the core-pulling rod 41 moves to the mold opening position, the two forming parts 43 respectively leave the two moving die cavities 210 of the corresponding moving die insert 21, and separate from the formed switch button 1 in the cavity 5.

[0045] In other embodiments, the number of the moving die inserts 21 and the number of the moving die cavities 210 on the moving die inserts 21 can be adjusted. For example, the eight moving die inserts 21 can be changed to four or six, or the two moving die cavities 210 on the moving die inserts 21 can be changed to three or four, and the number of the corresponding fixed die cavities 330 is adjusted. The number of the core-pulling devices 4 is the same as that of the moving die inserts 21, or the number of the core-pulling devices 4 can also be half of the number of the moving die inserts 21. For example, one moving die insert 21 is provided with one moving die cavity 210 for forming one cavity 5, and the core-pulling rod 41 of one core-pulling device 4 corresponds to the two cavities 5 formed by two moving die inserts 21; or, one moving die insert 21 is provided with two moving die cavities 210 for forming two cavities 5, and the core-pulling rod 41 of one core-pulling device 4 corresponds to the four cavities 5 formed by two moving die inserts 21. All of these belong to the protection scope of the present invention.

[0046] The injection mold of this embodiment can meet high requirements such as high precision, stable production, large production capacity, and efficient and convenient processing and assembly through reasonable layout of the mold space.

[0047] Such as Figures 4-6, the core-pulling rod 41 further includes a connecting portion 44 connected between two adjacent forming portions 43. An avoidance structure is provided on the connecting portion 44. When the core-pulling rod 41 moves to the mold-opening position, that is, when one of the forming portions 43 leaves the corresponding cavity 5, the connecting portion 44 adjacent to this forming portion 43 can move to the position where the original forming portion 43 was located in the cavity 5. The product is avoided through the avoidance structure on the connecting portion 44, so that the product can leave the cavity 5 along the mold-opening direction. Even if the core-pulling rod 41 does not completely leave the cavity 5, the smooth ejection of the product can be ensured. By means of the avoidance structure on the connecting portion 44, the stroke of each action of the core-pulling rod 41 can be shortened, and it is not necessary to completely pass through and leave multiple cavities 5 every time. In this embodiment, the moving direction of the core-pulling rod 41 is perpendicular to the mold-opening direction. Taking Figure 3 as an example, the mold-opening direction is the up-down direction, and the moving direction of the core-pulling rod 41 is the left-right direction; of course, the moving direction of the core-pulling rod 41 can also be set non-perpendicular to the mold-opening direction at a certain angle.

[0048] Specifically, the width of the connecting portion 44 is smaller than the width of the forming portion 43. Avoidance surfaces serving as avoidance structures are respectively provided on two opposite sides of the connecting portion 44. There are gaps between the avoidance surfaces on both sides of the connecting portion 44 and the rotating shaft undercuts 13 on both sides, and the avoidance surfaces are arranged parallel to the mold-opening direction of the rotating shaft undercuts 13 to ensure that the avoidance surfaces do not contact the rotating shaft undercuts 13. First convex platforms 431 and second convex platforms 432 protruding are respectively provided on two opposite sides of the forming portion 43. The first convex platform 431 cooperates with the cavity 5, and the second convex platform 432 cooperates with the moving die insert 21. A forming groove 434 for forming the rotating shaft undercut 13 is provided between the first convex platform 431 and the second convex platform 432. When the core-pulling rod 41 moves to the mold-opening position, it drives the forming portion 43 to leave the cavity 5, prevents the first convex platform 431 from blocking the ejection of the rotating shaft undercut 13, and makes the connecting portion 44 enter the cavity 5. The rotating shaft undercut 13 is avoided through the avoidance surfaces, so that the product is smoothly ejected.

[0049] In this embodiment, the core-pulling rod 41 is provided with two forming portions 43 and one connecting portion 44. When the mold is opened, the core-pulling rod 41 leaves the cavity 5 that is the farthest from the slider 42, and drives the connecting portion 44 to enter another cavity 5. It can be understood that if N forming portions 43 are provided, then N - 1 connecting portions 44 are provided. When the mold is opened, the core-pulling rod 41 leaves the cavity 5 that is the farthest from the slider 42, and drives the connecting portion 44 to enter other cavities 5.

[0050] Further, a limiting portion 45 is provided at the end of the core-pulling rod 41 away from the slider 42. The moving mold assembly 2 is provided with a limiting hole for inserting the limiting portion 45. The limiting portion 45 has the same shape as the connecting portion 44, but the limiting portion 45 is not connected between the two forming portions 43. The limiting portion 45 is inserted into the limiting hole of the moving mold assembly 2 during mold closing to limit the core-pulling rod 41, and avoids the rotating shaft undercut 13 through the avoiding surface during mold opening.

[0051] It can be understood that the limiting portion 45 can also adopt other shapes, such as the same shape as the forming portion 43, and completely leave the corresponding cavity 5 during mold opening. In addition, the limiting portion 45 can also be not provided. For example, the moving mold insert 21 and the core-pulling rod 41 are used for limiting, which all belong to the protection scope of the present utility model.

[0052] As Figure 4 shown, an embedded insert 26 for forming the moving mold cavity 210 is provided in the moving mold insert 21. The embedded insert 26 is perpendicular to the core-pulling rod 41. A insert hole 27 for passing through the core-pulling rod 41 is provided on the embedded insert 26. When the core-pulling rod 41 moves to the mold closing position, the forming portion 43 of the core-pulling rod 41 passes through the insert hole 27, and both ends of the forming portion 43 are oppositely arranged on both sides of the embedded insert 26. The cavity is formed by both ends of the forming portion 43. When the core-pulling rod 41 moves to the mold opening position, the connecting portion 44 of the core-pulling rod 41 passes through the insert hole 27, and both ends of the connecting portion 44 are oppositely arranged on both sides of the embedded insert 26. The formed product is avoided through the avoiding structure on the connecting portion 44. By providing the embedded insert 26 in the moving mold insert 21, it is not only convenient to assemble the moving mold insert 21, but also the core-pulling rod 41 can be limited by the embedded insert 26. Or, the embedded insert 26 can also be not provided. The embedded insert 26 can be integrated with the moving mold insert 21, or the embedded insert 26 can be integrated with the fixed mold core 33, which all belong to the protection scope of the present utility model.

[0053] Further, ejector rods 28 are respectively provided on two opposite sides of the embedded insert 26. The two ejector rods 28 on both sides of the embedded insert 26 are respectively inserted into the moving mold insert 21. The ejector rods 28 are used for forming the moving mold cavity 210 during mold closing, and are used for driving the rotating shaft undercut 13 to move in the mold opening direction and separate from the moving mold core 25 during mold opening.

[0054] As Figure 7As shown, the eight moving die inserts 21 of this embodiment form two rows of insert row combinations 61 arranged side by side. Each of the two rows of insert row combinations 61 includes four moving die inserts 21 arranged in the width direction. The four moving die inserts 21 of the two rows of insert row combinations 61 correspond to each other, and the two corresponding moving die inserts 21 are arranged opposite to each other in the length direction. Core pulling row combinations 62 are respectively provided on the sides of the two rows of insert row combinations 61 away from each other. The core pulling row combination 62 includes four core pulling devices 4 respectively corresponding to the moving die inserts 21 of the adjacent insert row combination 61, and the four core pulling devices 4 of the core pulling row combination 62 are arranged in the width direction of the moving die inserts 21. Two moving die inserts 21 are arranged between every two core pulling devices 4.

[0055] It can be understood that the insert row combination 61 and the core pulling row combination 62 may not be provided. It is equivalent to each of the two insert row combinations 61 being provided with one moving die insert 21, and each of the core pulling row combinations 62 being provided with one core pulling device 4, that is, two opposite core pulling devices 4 are provided, and two moving die inserts 21 are arranged between the two core pulling devices 4. When the core pulling rods 41 move towards the mold closing position, the core pulling rods 41 of the two opposite core pulling devices 4 move closer. When the core pulling rods 41 move towards the mold opening position, the core pulling rods 41 of the two opposite core pulling devices 4 move away. In addition, the number of the moving die inserts 21 and the core pulling devices 4 can also be adjusted. For example, each of the two insert row combinations 61 is provided with three moving die inserts 21, which all fall within the protection scope of the present invention.

[0056] As Figure 7 As shown, the eight moving die inserts 21 of this embodiment form two insert array combinations 7. Each of the two insert array combinations 7 includes four moving die inserts 21. The two insert array combinations 7 are arranged opposite to each other on both sides of the main runner 8. The insert array combination 7 includes two first inserts 71 arranged in the length direction, and two second inserts 72 respectively arranged on the sides of the first inserts 71 in the width direction. Core pulling devices 4 are provided on the sides of the two first inserts 71 away from each other and on the sides of the two second inserts 72 away from each other.

[0057] As Figure 8As shown, a first runner 81 communicating with the main runner 8 is provided between the two first inserts 71. One end of the first runner 81 away from the main runner 8 communicates with two second runners 82. The two second runners 82 are oppositely arranged on both sides of the first runner 81. One ends of the two second runners 82 away from the first runner 81 are respectively located between the two first inserts 71 and the adjacent second inserts 72. The two second runners 82 respectively communicate with two third runners 83. The two third runners 83 are oppositely arranged on both sides of the second runner 82. Fourth runners 84 communicating with the third runners 83 are respectively provided on the first inserts 71 and the second inserts 72, and two fifth runners 85 respectively communicating with the fourth runners 84. The fourth runner 84 is located between the two cavities 5. The two fifth runners 85 are oppositely arranged on both sides of the fourth runner 84 and respectively communicate between the two cavities 5 and the fourth runner 84.

[0058] Further, the fifth runner 85 includes a first branch runner 851 arranged in parallel with the fourth runner 84. The middle part of the first branch runner 851 communicates with the fourth runner 84. The sides of the first branch runner 851 away from the fourth runner 84 respectively communicate with two second branch runners 852. The sides of the two second branch runners 852 away from the first branch runner 851 respectively communicate with the same cavity 5. The positions where the two second branch runners 852 respectively communicate with the cavity 5 form gates.

[0059] Further, the first runner 81, the second runner 82 and the third runner 83 are composed of the moving die core 25 and the fixed die core 33. The fourth runner 84 and the fifth runner 85 are composed of the moving die insert 21 and the fixed die core 33.

[0060] As Figure 9 shown, the core-pulling device 4 of this embodiment includes a cam pin 46 and a lifter base 47 respectively connected to the fixed template 32, and two press strips 48 respectively connected to the moving template 24. The two press strips 48 are oppositely arranged on both sides of the slider 42 and are used to limit the slider 42 to move only along the core-pulling direction. The cam pin 46 is arranged at an oblique angle to the core-pulling direction. The cam pin 46 is used to drive the slider 42 to move during mold opening, so that the core-pulling rod 41 moves from the mold-closing position to the mold-opening position. The lifter base 47 is used to drive the slider 42 to move during mold closing, so that the core-pulling rod 41 moves from the mold-opening position to the mold-closing position.

[0061] Further, it includes at least two adjacent core-pulling rods 41. Two adjacent core-pulling rods 41 share one slider 42, that is, two core-pulling rods 41 are arranged on the slider 42, and the slider 42 can drive the two core-pulling rods 41 to move between the mold-opening position and the mold-closing position at the same time.

[0062] Preferably, two slider inserts 49 are provided on the slider 42, and the core-pulling rods 41 are arranged on both of the two slider inserts 49.

[0063] Preferably, on the side of the slider 42 away from the shovel base 47, i.e., the side close to the moving die core 25, an anti-collision spring 400 is provided. The anti-collision spring 400 can play a buffering role and reduce the impact of the collision between the slider 42 and the moving die core 25.

[0064] It can be understood that the slider 42 can also be provided with only one core-pulling rod 41. Each slider 42 only drives the core-pulling rod 41 installed thereon to move, or three or more core-pulling rods 41 are provided on the slider 42, and each slider 42 drives three or more core-pulling rods 41 to move simultaneously, which all fall within the protection scope of the present invention.

[0065] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which it is usually placed during use. It is only for the convenience of description and does not indicate that the device or element referred to must have a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating relative importance.

[0066] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, which should all be regarded as falling within the protection scope of the present invention.

Claims

1. An injection mold, comprising a moving mold unit (2), a fixed mold unit (3) and a core-pulling device (4), characterized in that: At least two cavities (5) are provided between the moving die module (2) and the fixed die module (3). The core-pulling device (4) includes a core-pulling rod (41) passing through at least two of the cavities (5), and a slider (42) for driving the core-pulling rod (41) to move between a mold-closing position and a mold-opening position. At least two forming portions (43) are provided on the core-pulling rod (41), and the at least two forming portions (43) respectively correspond to the at least two cavities (5). When the core-pulling rod (41) moves to the mold-closing position, the at least two forming portions (43) respectively move into the corresponding cavities (5) for product forming. When the core-pulling rod (41) moves to the mold-opening position, the at least two forming portions (43) respectively leave the corresponding cavities (5) and separate from the formed product.

2. The injection mold according to claim 1, characterized in that: The core-pulling rod (41) includes a connecting portion (44) connected between two adjacent forming portions (43). An avoidance structure is provided on the connecting portion (44). When at least one of the forming portions (43) leaves the corresponding cavity (5), the connecting portion (44) moves to the position where the original forming portion (43) was located in the cavity (5), and the product is avoided through the avoidance structure on the connecting portion (44), enabling the product to leave the cavity (5) along the mold-opening direction.

3. The injection mold according to claim 2, characterized in that: The forming portion (43) includes a first forming portion and a forming groove (434). The forming groove (434) is used for forming a shaft undercut (13), and the first forming portion is located in the mold-opening direction of the forming groove (434).

4. The injection mold according to claim 2, wherein: The width of the connecting portion (44) is smaller than the width of the forming portion (43). Avoidance surfaces serving as avoidance structures are respectively provided on two opposite sides of the connecting portion (44), and the avoidance surfaces are arranged parallel to the mold-opening direction.

5. The injection mold according to claim 2, characterized in that: On two opposite sides of the forming portion (43), a protruding first boss (431) and a second boss (432) are respectively provided. The first boss (431) cooperates with the cavity (5), and the second boss (432) cooperates with the moving die insert (21). A forming groove (434) for forming a shaft undercut (13) is provided between the first boss (431) and the second boss (432).

6. The injection mold according to claim 2, characterized in that: A limiting portion (45) is provided at the end of the core-pulling rod (41) far from the slider (42). The moving die module (2) is provided with a limiting hole for inserting the limiting portion (45) for limiting cooperation. Avoidance surfaces serving as avoidance structures are respectively provided on two opposite sides of the limiting portion (45).

7. The injection mold according to claim 1, characterized in that: The moving mold unit (2) and the fixed mold unit (3) are respectively provided with a moving mold core (25) and a fixed mold core (33). A plurality of moving mold inserts (21) are provided in the moving mold core (25). Corresponding core-pulling devices (4) are respectively provided on the plurality of moving mold inserts (21). Each moving mold insert (21) is provided with two moving mold cavities (210). The fixed mold core (33) is respectively provided with two fixed mold cavities (330) corresponding to each moving mold insert (21). The two fixed mold cavities (330) and the two moving mold cavities (210) on the corresponding moving mold insert (21) form two of the cavities (5). The core-pulling rod (41) is provided with two forming parts (43), and the two forming parts (43) respectively correspond to the two moving mold cavities (210) of the corresponding moving mold insert (21).

8. The injection mold according to claim 7, characterized in that: An embedding insert (26) for forming the moving mold cavity (210) is provided in the moving mold insert (21). The embedding insert (26) is perpendicular to the core-pulling rod (41). An insert hole (27) for passing through the core-pulling rod (41) is provided on the embedding insert (26). When the core-pulling rod (41) moves to the mold-closing position, the forming part (43) of the core-pulling rod (41) passes through the insert hole (27), and both ends of the forming part (43) are oppositely arranged on both sides of the embedding insert (26). The cavity is formed by both ends of the forming part (43). When the core-pulling rod (41) moves to the mold-opening position, the connecting part (44) of the core-pulling rod (41) passes through the insert hole (27), and both ends of the connecting part (44) are oppositely arranged on both sides of the embedding insert (26). The formed product is avoided by the avoidance structure on the connecting part (44).

9. The injection mold according to claim 8, wherein: Ejector rods (28) are respectively provided on two opposite sides of the embedding insert (26). The two ejector rods (28) on both sides of the embedding insert (26) are respectively inserted into the moving mold insert (21). The ejector rods (28) are used for forming the moving mold cavity (210) during mold closing and for driving the product to move along the mold-opening direction during mold opening.

10. The injection mold according to claim 7, characterized in that: It includes two core-pulling devices (4) arranged oppositely. Two moving mold inserts (21) are arranged between the two core-pulling devices (4). The two moving mold inserts (21) respectively correspond to the two core-pulling devices (4). When the core-pulling rod (41) moves towards the mold-closing position, the core-pulling rods (41) of the two opposite core-pulling devices (4) move closer. When the core-pulling rod (41) moves towards the mold-opening position, the core-pulling rods (41) of the two opposite core-pulling devices (4) move away from each other.

11. The injection mold according to claim 7, characterized in that: It includes two rows of insert row combinations (61) arranged side by side. Each of the two rows of insert row combinations (61) includes a plurality of moving die inserts (21) arranged in the width direction. The plurality of moving die inserts (21) of the two rows of insert row combinations (61) correspond to each other respectively, and the two corresponding moving die inserts (21) are arranged opposite to each other in the length direction. Core-pulling row combinations (62) are respectively provided on the sides of the two rows of insert row combinations (61) away from each other. The core-pulling row combination (62) includes a plurality of core-pulling devices (4) respectively corresponding to the moving die inserts (21) of the adjacent insert row combination (61), and the plurality of core-pulling devices (4) of the core-pulling row combination (62) are arranged in the width direction of the moving die insert (21).

12. The injection mold according to claim 7, wherein: It includes two insert array combinations (7). Each of the two insert array combinations (7) includes four moving die inserts (21). The two insert array combinations (7) are arranged opposite to each other on both sides of the main runner (8). The insert array combination (7) includes two first inserts (71) arranged in the length direction, and two embedded inserts (26) respectively arranged on the sides of the first inserts (71) in the width direction. Core-pulling devices (4) are provided on the sides of the two first inserts (71) away from each other and on the sides of the two embedded inserts (26) away from each other.

13. The injection mold according to claim 12, characterized in that: A first runner (81) communicating with the main runner (8) is provided between the two first inserts (71). One end of the first runner (81) away from the main runner (8) communicates with two second runners (82). The two second runners (82) are arranged opposite to each other on both sides of the first runner (81). One ends of the two second runners (82) away from the first runner (81) are respectively located between the two first inserts (71) and the adjacent embedded inserts (26). The two second runners (82) respectively communicate with two third runners (83). The two third runners (83) are arranged opposite to each other on both sides of the second runner (82). Fourth runners (84) communicating with the third runners (83) are respectively provided on the first inserts (71) and the embedded inserts (26), and two fifth runners (85) respectively communicating with the fourth runners (84) are provided. The fourth runner (84) is located between the two cavities (5). The two fifth runners (85) are arranged opposite to each other on both sides of the fourth runner (84) and respectively communicate between the two cavities (5) and the fourth runner (84).

14. The injection mold according to claim 13, characterized in that: The fifth runner (85) includes a first branch runner (851) arranged parallel to the fourth runner (84). The middle of the first branch runner (851) communicates with the fourth runner (84). The sides of the first branch runner (851) away from the fourth runner (84) respectively communicate with two second branch runners (852). The sides of the two second branch runners (852) away from the first branch runner (851) respectively communicate with the same cavity (5). The positions where the two second branch runners (852) communicate with the cavity (5) form gates.

15. The injection mold according to claim 13, wherein: The first runner (81), the second runner (82), and the third runner (83) are composed of the moving mold core (25) and the fixed mold core (33), and the fourth runner (84) and the fifth runner (85) are composed of the moving mold insert (21) and the fixed mold core (33).

16. The injection mold according to claim 1, characterized in that: The core-pulling device (4) includes a cam pin (46) and a lifter base (47) respectively connected to the fixed template (32), and two pressure bars (48) respectively connected to the moving template (24). The two pressure bars (48) are oppositely arranged on both sides of the slider (42) and are used to limit the slider (42) to move only along the core-pulling direction. The cam pin (46) is arranged at an oblique angle to the core-pulling direction. The cam pin (46) is used to drive the slider (42) to move during mold opening, so that the core-pulling rod (41) moves from the mold-closing position to the mold-opening position. The lifter base (47) is used to drive the slider (42) to move during mold closing, so that the core-pulling rod (41) moves from the mold-opening position to the mold-closing position.

17. The injection mold according to claim 16, wherein: At least two core-pulling rods (41) are arranged on the slider (42), and the slider (42) can simultaneously drive at least two core-pulling rods (41) to move between the mold-opening position and the mold-closing position.

18. The injection mold according to claim 16, characterized in that: At least two slider inserts (49) are arranged on the slider (42), and the core-pulling rods (41) are arranged on all of the at least two slider inserts (49).

19. The injection mold according to claim 16, characterized in that: An anti-collision spring (400) is arranged on one side of the slider (42) away from the lifter base (47).

20. The injection mold according to claim 1, wherein: The fixed mold set (3) includes a fixed mold base plate (31), a fixed template (32), and a fixed mold core (33), and the moving mold set (2) includes a moving mold base plate (22), mold feet (23), a moving template (24), and a moving mold core (25).

21. The injection mold according to claim 1, wherein: The moving direction of the core-pulling rod (41) is perpendicular to the demolding direction.

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