Die

Abstract

The embodiment of the utility model discloses a mold. The mold comprises a mold core assembly, an insert pin and an elastic reset piece. The mold core assembly comprises a front mold core and a rear mold core, the front mold core and the rear mold core are used for limiting and forming a workpiece cavity, and a communicating hole communicating with the workpiece cavity is formed in the front mold core or the rear mold core; the insert pin is movably arranged in the communicating hole in the mold opening and closing direction of the mold, and the end, close to the workpiece cavity, of the insert pin extends out of the communicating hole. When the mold is in a mold closing state, the elastic reset piece is in an elastic deformation state, and the end, extending out of the communicating hole, of the insert pin abuts against the cavity wall of the workpiece cavity under the action of the elastic reset piece. According to the die, the reliability of the die can be improved, and meanwhile the probability that burrs are generated at the bumping and perforating positions of a product can be reduced.

Description

Technical Field

[0001] The present application relates to the field of mold technology, and in particular to a mold. Background Art

[0002] During the production process, the mold can be injected to form a product with a punch hole through the insert pin. In the related art, if the mold is too tight, it is easy to cause damage to the mold core or the insert pin, and the reliability of the mold is relatively low; while if the mold is too loose, it may cause the insert pin and the mold core to not have sufficient contact, which will cause the product to have a flash at the punch hole. Utility Model Content

[0003] In view of this, the embodiments of the present application hope to provide a mold that can improve the reliability of the mold while reducing the probability of flashing at the puncture hole of the product.

[0004] To achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0005] The present application embodiment provides a mold, including:

[0006] A mold core assembly, comprising a front mold core and a rear mold core, wherein the front mold core and the rear mold core are used to define a workpiece cavity, and a connecting hole communicating with the workpiece cavity is provided on the front mold core or the rear mold core;

[0007] An insert pin is movably disposed in the communication hole along the opening and closing direction of the mold, and one end of the insert pin close to the workpiece cavity extends out of the communication hole;

[0008] The elastic reset member is in an elastically deformed state when the mold is in a closed state, and one end of the insert pin extending out of the connecting hole abuts against the cavity wall of the workpiece cavity under the action of the elastic reset member.

[0009] In one embodiment, the connecting hole passes through the side of the front mold core or the rear mold core away from the workpiece cavity along the mold opening and closing direction, and the mold also includes a limiting member arranged at the end of the inserting pin away from the workpiece cavity, at least a portion of the limiting member is arranged in the connecting hole, and the elastic reset member is arranged between the inserting pin and the limiting member.

[0010] In one embodiment, a first step surface is provided on the peripheral wall of the connecting hole, and the insert needle includes a needle head and a limiting portion, the limiting portion is provided at an end of the needle head away from the workpiece cavity, and the first step surface is used to limit the movement of the limiting portion toward a side close to the workpiece cavity.

[0011] In one embodiment, along the direction away from the workpiece cavity, the connecting hole includes a first connecting section and a second connecting section arranged in sequence, the radial dimension of the second connecting section is larger than the radial dimension of the first connecting section, the end wall of the second connecting section close to one end of the first connecting section constitutes the first step surface, at least a part of the needle head is arranged in the first connecting section, and the limiting portion is arranged in the second connecting section.

[0012] In one embodiment, the needle insert further includes a guide post, which is disposed on a side of the limiting portion away from the needle head, and the elastic reset member is sleeved on the guide post.

[0013] In one embodiment, the radial dimension of the guide column is smaller than the radial dimension of the limiting portion, and one end of the elastic reset member abuts against an end of the limiting portion away from the needle.

[0014] In one embodiment, when the mold is in a closed state and the limiting member is limiting the position of the insert needle, the spacing between the needle head and the workpiece cavity along the opening and closing direction is a first spacing, and the spacing between the limiting portion and the first step surface along the opening and closing direction is a second spacing, and the first spacing is not greater than the second spacing.

[0015] In one implementation, the first spacing has a value range of 0.01 mm to 0.05 mm.

[0016] In one implementation, the second spacing has a value range of 0.05 mm to 0.1 mm.

[0017] In one embodiment, the end of the connecting hole away from the workpiece cavity is a third connecting section, the limiting member is arranged in the third connecting section, and the radial dimension of the limiting member is larger than the radial dimension of the remaining part of the connecting hole except the third connecting section.

[0018] In the mold of the embodiment of the present application, the insert pin is movably arranged in the connecting hole along the opening and closing direction of the mold. When the mold is in the closed state, the elastic reset member is in an elastic deformation state, and the end of the insert pin extending out of the connecting hole abuts against the cavity wall of the workpiece cavity under the action of the elastic reset member. In the process of switching the mold from the open state to the closed state, the insert pin flexibly abuts against the cavity wall of the workpiece cavity through the elastic reset member, which is conducive to reducing the probability of damage to the insert pin or the cavity wall of the workpiece cavity; at the same time, the insert pin can abut against the cavity wall of the workpiece cavity relatively stably under the action of the elastic reset member, and the fitting effect between the insert pin and the cavity wall of the workpiece cavity is better, which is conducive to reducing the probability of a gap between the end of the insert pin and the cavity wall of the workpiece cavity, that is, it is conducive to reducing the probability of the injection plastic entering the gap between the end of the insert pin and the cavity wall of the workpiece cavity, thereby reducing the probability of flashing at the hole of the product. Therefore, it is conducive to improving the reliability of the mold and reducing the probability of flashing at the hole of the product.

[0019] In addition, during multiple production processes, even if there is a certain precision deviation when the mold is switched to the mold closing state each time, the precision deviation can be compensated by the elastic reset part, so that the mold can be produced continuously and stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic cross-sectional structure diagram of a mold according to an embodiment of the present application, wherein only a partial structure of the mold is shown;

[0021] Figure 2 for Figure 1 The enlarged schematic diagram at A in the middle;

[0022] Figure 3 for Figure 1 The enlarged schematic diagram at B in the middle, wherein the dotted line at C is the position of the insert pin close to one end of the workpiece cavity when the limit member limits the insert pin.

[0023] Description of Reference Numerals

[0024] 10. Mold core assembly; 10a. Workpiece cavity; 11. Front mold core; 11a. Connecting hole; 11b. First step surface; 11c. Second step surface; 11aa. First connecting section; 11ab. Second connecting section; 11ac. Third connecting section; 12. Back mold core; 20. Insert needle; 21. Needle head; 22. Limiting part; 23. Guide column; 30. Elastic reset member; 40. Limiting member. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and are therefore only used as examples, and the protection scope of the present application cannot be limited by this. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0026] In the description of the embodiments of the present application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0027] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0029] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0030] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0031] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] See also Figures 1 to 3 The present application discloses a mold, which includes a core component 10, an insert pin 20 and an elastic reset member 30.

[0033] The mold core assembly 10 includes a front mold core 11 and a rear mold core 12, and the front mold core 11 and the rear mold core 12 are used to define a workpiece cavity 10a. Specifically, when the mold is in a closed state, the workpiece cavity 10a is defined between the front mold core 11 and the rear mold core 12, and the injection plastic can be filled into the workpiece cavity 10a and molded in the workpiece cavity 10a to obtain a product; when the mold is in an open state, the front mold core 11 and the rear mold core 12 are separated, so that it is easy to take out the product.

[0034] It should be noted that the type of injection molding material is not limited, and can be, for example, a metal injection molding material such as steel, or a plastic injection molding material.

[0035] The cavity wall of the workpiece cavity 10a is a molding surface, and the molding surface is used for the surface of the molded product.

[0036] The front mold core 11 or the rear mold core 12 is provided with a connecting hole 11a connected to the workpiece cavity 10a. Figure 2 As shown, the embodiment of the present application is illustrated by arranging a connecting hole 11a on the front mold core 11.

[0037] The inserting pin 20 is movably disposed in the communicating hole 11 a along the opening and closing direction of the mold, and one end of the inserting pin 20 close to the workpiece cavity 10 a extends out of the communicating hole 11 a.

[0038] The mold opening and closing direction is the direction in which one of the front mold core 11 and the rear mold core 12 moves relative to the other when the mold switches between the mold closing state and the mold opening state. Figure 1 The direction shown by L1.

[0039] In the mold opening state and when the insert pin 20 is not affected by external force, the end of the insert pin 20 close to the workpiece cavity 10a extends out of the connecting hole 11a. Of course, after the external force acts on the insert pin 20, the insert pin 20 can move along the mold opening and closing direction relative to the connecting hole 11a, and the length of the end of the insert pin 20 close to the workpiece cavity 10a extending out of the connecting hole 11a can be reduced.

[0040] When the mold is in the closed state, the elastic reset member 30 is in an elastically deformed state, and one end of the insert pin 20 extending out of the communicating hole 11 a abuts against the cavity wall of the workpiece cavity 10 a under the action of the elastic reset member 30 .

[0041] The type of the elastic reset member 30 is not limited, and can be, for example, a compression spring, a tension spring, a spring sheet, etc.

[0042] During the injection molding production process, since one end of the insert pin 20 extending out of the connecting hole 11a abuts against the cavity wall of the workpiece cavity 10a, the injection plastic is filled into the workpiece cavity 10a and flows to the position of the insert pin 20, then it bypasses the insert pin 20. After the product is molded, the insert pin 20 is pulled out, and the space occupied by the insert pin 20 becomes the penetration hole of the product.

[0043] It can be understood that, in the open mold state, the length dimension of the end of the insert pin 20 close to the workpiece cavity 10a extending out of the connecting hole 11a is a first dimension; in the closed mold state, along the opening and closing directions, the spacing dimension between the end of the connecting hole 11a close to the workpiece cavity 10a and the cavity wall of the workpiece cavity 10a is a second dimension, and the first dimension is greater than the second dimension.

[0044] During the process of switching the mold from the open state to the closed state, the rear mold core 12 first contacts the pin 20 (the mold has not yet switched to the closed state), and the mold continues to switch to the closed state. The rear mold core 12 squeezes the pin 20, and the end of the pin 20 close to the rear mold core 12 moves toward the connecting hole 11a under the action of the rear mold core 12. The length of the end of the pin 20 close to the workpiece cavity 10a extending out of the connecting hole 11a gradually decreases, and the elastic return member 30 simultaneously produces elastic deformation. The elastic force generated by the elastic return member 30 after the elastic deformation acts on the pin 20, so that the pin 20 can be relatively stably abutted against the rear mold core 12.

[0045] During the process of switching the mold from the closed state to the open state, the rear mold core 12 and the front mold core 11 are gradually separated, the restriction of the rear mold core 12 on the insert pin 20 is gradually lifted, and the elastic reset part 30 restores its elastic deformation, thereby driving the end of the insert pin 20 close to the rear mold core 12 to move away from the connecting hole 11a, and the length of the end of the insert pin 20 close to the workpiece cavity 10a extending out of the connecting hole 11a gradually increases.

[0046] Therefore, when the mold is repeatedly switched between the open mold state and the closed mold state, the insert pin 20 can stably abut against the rear mold core 12, so that continuous and stable production can be achieved.

[0047] It can be understood that in the process of switching the mold from the open state to the closed state, the elastic reset member 30 changes the rigid abutment between the insert pin 20 and the rear mold core 12 into a flexible abutment, thereby reducing the probability of damage to the insert pin 20 or the rear mold core 12; at the same time, the insert pin 20 can be relatively stably abutted against the rear mold core 12 under the action of the elastic reset member 30, and the fit between the insert pin 20 and the rear mold core 12 is better, which reduces the probability of a gap between the end of the insert pin 20 and the rear mold core 12, that is, reduces the probability of the injection plastic entering the gap between the end of the insert pin 20 and the rear mold core 12, thereby reducing the probability of flashing at the puncture hole of the product.

[0048] In the related art, the insert pin is fixedly connected to the front mold core, the mold is too tight, and the insert pin is rigidly abutted against the rear mold core, which can easily cause damage to the rear mold core or the insert pin, and the reliability of the mold is relatively low; while too loose mold matching may cause a gap between the end of the insert pin and the rear mold core, which in turn causes burrs at the puncture holes of the product. Even if the mold is just right for the first time, the mold is prone to problems of too tight or too loose mold matching during repeated production, because the mold matching accuracy cannot be kept completely consistent.

[0049] It should be noted that "mold matching" is the operation of switching the mold from an open mold state to a closed mold state.

[0050] In the mold of the embodiment of the present application, the insert pin 20 is movably arranged in the connecting hole 11a along the opening and closing direction of the mold. When the mold is in the closed state, the elastic return member 30 is in an elastic deformation state, and the end of the insert pin 20 extending out of the connecting hole 11a abuts against the cavity wall of the workpiece cavity 10a under the action of the elastic return member 30. During the process of switching the mold from the open mold state to the closed mold state, the insert pin 20 flexibly abuts against the cavity wall of the workpiece cavity 10a through the elastic reset member 30, which is conducive to reducing the probability of damage to the insert pin 20 or the cavity wall of the workpiece cavity 10a; at the same time, the insert pin 20 can be relatively stably abutted against the cavity wall of the workpiece cavity 10a under the action of the elastic reset member 30, and the fit effect between the insert pin 20 and the cavity wall of the workpiece cavity 10a is better, which is conducive to reducing the probability of a gap between the end of the insert pin 20 and the cavity wall of the workpiece cavity 10a, that is, it is conducive to reducing the probability of the injection plastic entering the gap between the end of the insert pin 20 and the cavity wall of the workpiece cavity 10a, thereby reducing the probability of flashing at the puncture hole of the product. Therefore, it is conducive to improving the reliability of the mold and reducing the probability of flashing at the puncture hole of the product.

[0051] In addition, during multiple production processes, even if there is a certain precision deviation when the mold is switched to the mold closing state each time, the precision deviation can be compensated by the elastic reset member 30, so that the mold can be produced continuously and stably.

[0052] See also Figure 1 and Figure 2 In one embodiment, the connecting hole 11a passes through the side of the front mold core 11 or the rear mold core 12 away from the workpiece cavity 10a along the mold opening and closing direction.

[0053] It can be understood that, in the embodiment where the connecting hole 11a is opened in the front mold core 11, the connecting hole 11a passes through the side of the front mold core 11 away from the workpiece cavity 10a along the mold opening and closing direction; in the embodiment where the connecting hole 11a is opened in the rear mold core 12, the connecting hole 11a passes through the side of the rear mold core 12 away from the workpiece cavity 10a along the mold opening and closing direction.

[0054] For example, see Figure 1 and Figure 2 The connecting hole 11a passes through the opposite sides of the front mold core 11 along the opening and closing direction. During the installation of the insert pin 20, the insert pin 20 can be inserted from the side of the front mold core 11 away from the workpiece cavity 10a, thereby facilitating the installation of the insert pin 20.

[0055] The mold further includes a limiting member 40 disposed at one end of the insert pin 20 away from the workpiece cavity 10 a . At least a portion of the limiting member 40 is disposed in the connecting hole 11 a . The elastic reset member 30 is disposed between the insert pin 20 and the limiting member 40 .

[0056] By setting a limit member 40 at the end of the insert pin 20 away from the workpiece cavity 10a, on the one hand, the limit member 40 provides a force point for the elastic return member 30, and when the insert pin 20 moves along the mold opening and closing direction toward the side away from the rear mold core 12, the limit member 40 supports one end of the elastic return member 30, and the elastic return member 30 can produce elastic deformation; on the other hand, the limit member 40 can limit the movement of the insert pin 20 along the mold opening and closing direction toward the side away from the rear mold core 12, that is, it can control the movement distance of the insert pin 20 along this direction.

[0057] See also Figure 1 and Figure 2 In one embodiment, a first step surface 11b is provided on the peripheral wall of the connecting hole 11a, and the insert needle 20 includes a needle head 21 and a limiting portion 22. The limiting portion 22 is provided at an end of the needle head 21 away from the workpiece cavity 10a, and the first step surface 11b is used to limit the movement of the limiting portion 22 toward the side close to the workpiece cavity 10a.

[0058] The needle 21 and the limiting portion 22 may be a split structure. The needle 21 and the limiting portion 22 of the split structure may be connected by a detachable connection method such as fastening with a fastener, plugging, or may be connected by a non-detachable connection method such as welding. Of course, the needle 21 and the limiting portion 22 may also be an integrally formed structure.

[0059] In this embodiment, one end of the needle 21 away from the limiting portion 22 extends out of the communicating hole 11 a , and in the mold closing state, the needle 21 abuts against the cavity wall of the workpiece cavity 10 a .

[0060] During the process of switching the mold from the closed state to the open state, the restriction of the rear mold core 12 on the insert pin 20 gradually disappears. At this time, the insert pin 20 moves toward the side close to the workpiece cavity 10a under the action of its own gravity or other forces (for example, the elastic force provided by the elastic return member 30 to restore the elastic deformation), and by setting the first step surface 11b, the movement of the insert pin 20 along this direction can be limited, thereby reducing the probability of the insert pin 20 escaping from the end of the connecting hole 11a close to the workpiece cavity 10a.

[0061] The first step surface 11b cooperates with the limit piece 40 to form limits on the movement of the insert pin 20 on both sides of the connecting hole 11a along the mold opening and closing direction. This is beneficial for the stable installation of the insert pin 20 in the connecting hole 11a and the stable relative movement, so that the mold can be produced continuously and stably.

[0062] The method of forming the first step surface 11b in the communicating hole 11a is not limited. Figure 1 and Figure 2 Along the direction away from the workpiece cavity 10a, the connecting hole 11a includes a first connecting section 11aa and a second connecting section 11ab arranged in sequence, the radial dimension of the second connecting section 11ab is greater than the radial dimension of the first connecting section 11aa, and the end wall of the second connecting section 11ab close to one end of the first connecting section 11aa constitutes a first step surface 11b, at least part of the needle 21 is arranged in the first connecting section 11aa, and the limiting portion 22 is arranged in the second connecting section 11ab.

[0063] Here, the first step surface 11 b is substantially annular, that is, an annular surface.

[0064] The radial dimension of the limiting portion 22 is greater than the radial dimension of the needle 21. In the mold opening state, the limiting portion 22 can abut against the first step surface 11b through the elastic reset member 30, thereby reducing the probability of the needle 20 shaking in the connecting hole 11a and improving the reliability of the mold.

[0065] In this embodiment, the communicating hole 11 a can form the first step surface 11 b after one diameter change, so that the structure of the communicating hole 11 a is simpler.

[0066] See also Figure 1 and Figure 2 In one embodiment, the needle insert 20 further includes a guide post 23 , which is disposed on a side of the limiting portion 22 away from the needle head 21 , and the elastic reset member 30 is sleeved on the guide post 23 .

[0067] The specific shape of the guide pillar 23 is not limited, for example, it can be a prism, a cylinder, etc.

[0068] The guide post 23 and the limiter 22 may be a split structure. The guide post 23 and the limiter 22 of the split structure may be connected by a detachable connection method such as fastening with fasteners or plugging, or may be connected by a non-detachable connection method such as welding. Of course, the guide post 23 and the limiter 22 may also be an integrally formed structure.

[0069] The guide column 23 provides guidance for the elastic deformation of the elastic reset member 30, which is beneficial to reducing the probability of radial swing and other problems when the elastic reset member 30 is subjected to force. The elastic reset member 30 produces elastic deformation roughly along its axial direction, and the elastic force after the elastic deformation is basically parallel to the opening and closing direction of the mold.

[0070] See also Figure 1 and Figure 2 In one embodiment, the radial dimension of the guide column 23 is smaller than the radial dimension of the limiting portion 22 , and one end of the elastic reset member 30 abuts against an end of the limiting portion 22 away from the needle 21 .

[0071] In this embodiment, the end wall of the limiting portion 22 close to the guide column 23 will not be completely occupied by the guide column 23. After the elastic return member 30 is sleeved on the guide column 23, the portion of the end wall of the limiting portion 22 not occupied by the guide column 23 can provide a force point for the elastic return member 30, thereby facilitating the installation of the elastic return member 30.

[0072] When the limiting portion 22 moves toward the limiting member 40 , the end of the elastic reset member 30 close to the limiting member 40 is limited by the limiting member 40 , while the end close to the limiting portion 22 is squeezed by the limiting portion 22 , thereby generating elastic deformation.

[0073] See also Figures 1 to 3 In one embodiment, when the mold is in a closed state and the limiting member 40 limits the insert needle 20, the distance between the needle head 21 and the workpiece cavity 10a along the opening and closing direction is a first distance, and the distance between the limiting portion 22 and the first step surface 11b along the opening and closing direction is a second distance.

[0074] It should be noted that in the actual production process, when the mold is in the closed state, the limit member 40 is not necessarily in the limited state for the insert pin 20. In the process of switching the mold from the open state to the closed state, after the rear mold core 12 contacts the insert pin 20, the rear mold core 12 squeezes the insert pin 20 and pushes the insert pin 20 to move. That is, when the mold is in the closed state, the insert pin 20 is in contact with the cavity wall of the workpiece cavity 10a, and there is no gap between the two.

[0075] That is to say, "the state in which the mold is in the mold-closing state and the limiting member 40 limits the position of the insert pin 20" is an imaginary state, in which there may be a gap between the end of the insert pin 20 close to the workpiece cavity 10a and the cavity wall of the workpiece cavity 10a. For example, in this imaginary state, the position of the end of the insert pin 20 close to the workpiece cavity 10a is as follows: Figure 3 As shown by the dotted line at C in the middle, the first spacing is Figure 3 As shown in D1.

[0076] The second spacing is Figure 2 As shown in D2.

[0077] The first spacing is the maximum displacement that the insert pin 20 may need to produce in the mold opening and closing direction in order to meet the cavity wall of the workpiece cavity 10a, and the second spacing is the maximum displacement that the insert pin 20 can produce in the mold opening and closing direction.

[0078] The first spacing is not greater than the second spacing. Therefore, the first step surface 11b and the stopper 40 limit the position of the insert pin 20, which can meet the fit between the insert pin 20 and the cavity wall of the workpiece cavity 10a, which is beneficial to reduce the probability of flashing at the penetration hole of the product.

[0079] See also Figure 1 and Figure 3 In one embodiment, the first spacing has a value range of 0.01 mm to 0.05 mm, for example, 0.01 mm, 0.02 mm, 0.03 mm, 0.04 mm or 0.05 mm.

[0080] In this embodiment, when the mold is in the mold closing state, the limiting member 40 and the end of the inserting pin 20 away from the workpiece cavity 10a do not form an abutting relationship, and the distance between the limiting member 40 and the end of the inserting pin 20 away from the workpiece cavity 10a is equal to the first distance.

[0081] See also Figure 1 and Figure 2 In one embodiment, the second spacing has a value range of 0.05 mm to 0.1 mm, for example, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, etc.

[0082] In one embodiment, the end of the connecting hole 11a away from the workpiece cavity 10a is a third connecting section 11ac, and the limiting member 40 is disposed in the third connecting section 11ac. The radial dimension of the limiting member 40 is larger than the radial dimension of the remaining part of the connecting hole 11a except the third connecting section 11ac.

[0083] That is, the radial dimension of the third communicating section 11ac is greater than the radial dimension of the remaining portion of the communicating hole 11a, and the end wall of the third communicating section 11ac at one end close to the workpiece cavity 10a is formed as a second step surface 11c.

[0084] During the process of installing the limit member 40 in the connecting hole 11a, after the limit member 40 is pushed into the connecting hole 11a and abuts against the second step surface 11c, the limit member 40 can no longer move into the connecting hole 11a, thereby facilitating the assembler to confirm that the limit member 40 has been installed to the designed position.

[0085] In addition, the second step surface 11c also limits the position of the limiter 40 in the connecting hole 11a, and the limiter 40 will not enter the workpiece cavity 10a through the connecting hole 11a under the action of its own gravity or other forces, thereby helping to improve the reliability of mold production.

[0086] In a specific embodiment, the connecting hole 11a includes a first connecting section 11aa, a second connecting section 11ab and a third connecting section 11ac which are arranged in sequence along a direction away from the workpiece cavity 10a, and an end wall of the third connecting section 11ac close to one end of the second connecting section 11ab is formed as a second step surface 11c.

[0087] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A mold, characterized in that: include: A mold core assembly, comprising a front mold core and a rear mold core, wherein the front mold core and the rear mold core are used to define a workpiece cavity, and a connecting hole communicating with the workpiece cavity is provided on the front mold core or the rear mold core; An insert pin is movably disposed in the communication hole along the opening and closing direction of the mold, and one end of the insert pin close to the workpiece cavity extends out of the communication hole; The elastic reset member is in an elastically deformed state when the mold is in a closed state, and one end of the insert pin extending out of the connecting hole abuts against the cavity wall of the workpiece cavity under the action of the elastic reset member.

2. The mold according to claim 1, characterized in that: The connecting hole passes through the side of the front mold core or the rear mold core away from the workpiece cavity along the opening and closing direction of the mold. The mold also includes a limiting member arranged at the end of the inserting pin away from the workpiece cavity. At least a part of the limiting member is arranged in the connecting hole, and the elastic reset member is arranged between the inserting pin and the limiting member.

3. The mold according to claim 2, characterized in that: A first step surface is provided on the peripheral wall of the connecting hole, and the insert needle includes a needle head and a limiting portion. The limiting portion is provided at an end of the needle head away from the workpiece cavity, and the first step surface is used to limit the movement of the limiting portion toward the side close to the workpiece cavity.

4. The mold according to claim 3, characterized in that: Along the direction away from the workpiece cavity, the connecting hole includes a first connecting section and a second connecting section arranged in sequence, the radial dimension of the second connecting section is larger than the radial dimension of the first connecting section, the end wall of the second connecting section close to one end of the first connecting section constitutes the first step surface, at least part of the needle head is arranged in the first connecting section, and the limiting portion is arranged in the second connecting section.

5. The mold according to claim 3, characterized in that: The needle insert also includes a guide post, which is arranged on a side of the limiting portion away from the needle head, and the elastic reset member is sleeved on the guide post.

6. The mold according to claim 5, characterized in that: The radial dimension of the guide column is smaller than the radial dimension of the limiting portion, and one end of the elastic reset member abuts against an end of the limiting portion away from the needle.

7. The mold according to claim 3, characterized in that: When the mold is in a closed state and the limiting member is limiting the position of the insert needle, the spacing between the needle head and the workpiece cavity along the mold opening and closing direction is a first spacing, and the spacing between the limiting portion and the first step surface along the mold opening and closing direction is a second spacing, and the first spacing is not greater than the second spacing.

8. The mold according to claim 7, characterized in that: The first spacing has a value range of 0.01 mm to 0.05 mm.

9. The mold according to claim 7, characterized in that: The second spacing has a value range of 0.05 mm to 0.1 mm.

10. The mold according to claim 2, characterized in that: One end of the communicating hole away from the workpiece cavity is a third communicating section, the limiting member is arranged in the third communicating section, and the radial dimension of the limiting member is larger than the radial dimension of the remaining part of the communicating hole except the third communicating section.

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