Insert assembly replacement structure of mold and mold

Abstract

The invention discloses an insert assembly replacement structure of a mold and the mold. The insert assembly replacement structure of the mold comprises an ejection mechanism and a driving mechanism. The ejection mechanism has a first state and a second state, the driving mechanism drives the ejection mechanism to switch between the first state and the second state, and in the first state, the ejection mechanism drives the insert assembly to move in the first direction, so that at least the upper part of the insert assembly protrudes out of the surface of the mold, and the insert assembly can be separated relative to the ejection mechanism; and in the second state, the ejection mechanism is connected with the insert assembly and drives the insert assembly to move in the second direction opposite to the first direction, so that the insert assembly is embedded into the mold. According to the injection mold, the ejection mechanism is driven by the driving mechanism, so that at least the upper part of the insert assembly protrudes out of the surface of the mold or the insert assembly is embedded into the mold, and the convenience and efficiency of disassembly and replacement of the insert assembly are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molds, and in particular relates to a mold insert component replacement structure and a mold. Background Art

[0002] A mold is a tool used to shape an object. It is a mold component used to be embedded in the core of an injection mold. It mainly realizes the processing of the object's appearance by changing the physical state of the molded material. The compression molding or injection molding of engineering plastics, rubber, ceramics and other products is used to make the blank into a plastic product with a specific shape and size under the action of external force.

[0003] When making molds for multiple similar products, the product forming requirements are often met by exchanging some mold parts. When designing the mold, different mold forming parts need to be made according to different parts of the product, and different inserts are replaced before mold injection. During the installation and replacement of existing inserts, connectors are usually used to fix the inserts. However, it is difficult to quickly replace the inserts after they are damaged, and if there are multiple inserts, the damaged inserts need to be disassembled one by one, which reduces the convenience of disassembly and replacement of the inserts, resulting in low efficiency in disassembly and replacement of the inserts.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art. The first purpose is to provide a mold insert replacement structure. The structure is equipped with an ejection mechanism and a driving mechanism. When driven by the driving mechanism, the ejection mechanism makes at least the upper part of the insert assembly protrude from the surface of the mold or the insert assembly is embedded in the mold, thereby improving the convenience and efficiency of disassembly, assembly and replacement of the insert assembly.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0007] A mold insert component replacement structure includes an ejection mechanism and a drive mechanism.

[0008] The ejection mechanism has a first state and a second state, and the driving mechanism drives the ejection mechanism to switch between the first state and the second state;

[0009] In the first state, the ejection mechanism drives the insert assembly to move along the first direction, so that at least the upper portion of the insert assembly protrudes from the surface of the mold, and the insert assembly is separable from the ejection mechanism;

[0010] In the second state, the ejection mechanism is connected to the insert assembly, driving the insert assembly to move along a second direction opposite to the first direction, so that the insert assembly is embedded in the mold.

[0011] Preferably, in the first state, the ejection mechanism drives the insert assembly to move along the first direction while releasing the connection to the insert assembly;

[0012] In the second state, the ejection mechanism first preliminarily locks the insert assembly, and drives the insert assembly to move in a second direction opposite to the first direction to synchronously lock the insert assembly;

[0013] Preferably, in the first state, the ejection mechanism drives the insert assembly to move upward, so that the insert assembly is completely protruded from the upper surface of the mold;

[0014] Preferably, in the second state, the ejection mechanism drives the insert assembly to move downward, and the insert assembly is completely embedded in the mold.

[0015] Preferably, the ejection mechanism comprises:

[0016] The rotatably connected arm has a first end that is released or locked with the insert assembly, wherein the first end is released from the insert assembly during upward movement and locked during downward movement.

[0017] Preferably, during the upward movement, the connecting arm rotates relative to the insert assembly along a first preset direction, and the first end of the connecting arm releases the insert assembly;

[0018] During the downward movement, the connecting arm rotates relative to the insert assembly along a second preset direction opposite to the first preset direction, and the first end of the connecting arm locks the insert assembly.

[0019] Preferably, the mold insert assembly replacement structure includes:

[0020] The guide member is installed on the driving mechanism and abuts against the connecting arm. When the connecting arm and the insert assembly move downward, the guide member is used to convert a part of the force of the driving mechanism driving the ejection mechanism downward into a force driving the connecting arm to rotate and lock the insert assembly;

[0021] Preferably, the rotatable connecting arm has a second end away from the first end, and the rotating portion of the connecting arm is located between the first end and the second end;

[0022] The guide member is located between the rotating portion and the second end;

[0023] Preferably, the guide member is located close to the rotating portion.

[0024] Preferably, two connecting arms are provided, which are arranged on opposite sides of the guide member;

[0025] An elastic component is installed on the connecting arm, the elastic component is located between the first end and the rotating part, and the elastic component is used to provide a force for loosening the connecting arm and the insert component;

[0026] Preferably, the elastic component is supported between the two connecting arms.

[0027] Preferably, the elastic component comprises a support member and an elastic member;

[0028] Two support members are provided, protruding on the surfaces opposite to the two connecting arms, the elastic member is installed on the protruding ends of the support members, and there is a spacing between the protruding ends of the two support members for the elastic member to deform under force.

[0029] Preferably, the ejection mechanism comprises:

[0030] The ejector is disposed above the driving mechanism and is rotatably connected to the connecting arm. Under the drive of the driving mechanism, the connecting arm is driven to move upward or downward.

[0031] Preferably, notches are provided on opposite sides of the ejector, and the notches are formed by extending inward from the edge of the ejector;

[0032] The rotating part of the connecting arm is rotatably mounted on the wall surface forming the notch;

[0033] The side of the guide piece abutting against the connecting arm protrudes from the notch.

[0034] Preferably, the driving mechanism comprises,

[0035] The shell is hollow inside;

[0036] A pump body, the wall of which is in sealing contact with the inner wall of the housing and is capable of reciprocating movement within the housing;

[0037] A connecting rod, one end of which is connected to the pump body, and the other end of which protrudes from the housing and is connected to the ejector;

[0038] Preferably, the guide member is sleeved on the outer periphery of the shell and is located between the ejector member and the shell.

[0039] The second object of the present invention is to provide a mold, comprising a mounting groove for mounting an insert assembly, and an insert assembly replacement structure of the mold is arranged below the mounting groove.

[0040] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0041] In the present invention, the ejection mechanism is driven by the driving mechanism so that at least the upper part of the insert assembly protrudes from the surface of the mold or the insert assembly is embedded in the mold, thereby improving the convenience and efficiency of disassembly, assembly and replacement of the insert assembly.

[0042] In the present invention, in a first state, the ejection mechanism drives the insert assembly to move upward and keeps synchronization with the ejection mechanism releasing the connection with the insert assembly, so as to avoid that when the insert assembly is not released from the ejection mechanism during the upward movement, the insert assembly is deformed when the insert assembly is subjected to the force provided by the staff to remove the insert assembly when the staff replaces the insert assembly, thereby causing damage to the insert assembly; in a second state, the ejection mechanism first preliminarily locks the insert assembly and preliminarily fixes the insert assembly, and drives the insert assembly to move downward and synchronously locks the insert assembly, thereby increasing the tightness of the connection between the insert assembly and the ejection mechanism, ensuring that the insert assembly is more firmly connected to the ejection mechanism, and preventing the insert assembly from being displaced or falling off during operation.

[0043] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0045] Figure 1 It is a schematic diagram of the structure in which the mold of the present invention is installed on a base;

[0046] Figure 2 is a schematic structural diagram of the present invention with the base removed;

[0047] Figure 3 It is a schematic diagram of the insert replacement structure and the assembly of the insert and the mold of the present invention;

[0048] Figure 4 It is a schematic diagram of another angle of the insert replacement structure and the assembly of the insert and the mold of the present invention;

[0049] Figure 5 It is a top view of the insert replacement structure and the assembly of the insert and the mold of the present invention;

[0050] Figure 6 yes Figure 5 A cross-sectional view of the middle AA section with the ejection mechanism in the second state;

[0051] Figure 7 yes Figure 6 Enlarged view of area B;

[0052] Figure 8 is a cross-sectional view of the ejection mechanism in a first state;

[0053] Fig. 9 yes Figure 8 Magnified view of area C.

[0054] In the figure: 1. ejection mechanism; 11. connecting arm; 111. first end; 112. rotating part; 113. second end; 12. elastic component; 121. supporting member; 122. elastic member; 13. ejection member; 2. driving mechanism; 21. housing; 22. pump body; 23. connecting rod; 3. insert assembly; 31. insert; 32. connecting member; 4. guide member; 5. mounting frame; 6. mold; 7. base.

[0055] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0057] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0058] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] like Figures 1 to 9 As shown, the present invention provides a mold insert assembly replacement structure, including an ejection mechanism 1 and a driving mechanism 2.

[0060] Specifically, the ejection mechanism 1 has a first state and a second state, and the driving mechanism 2 drives the ejection mechanism 1 to switch between the first state and the second state. In the first state, the ejection mechanism 1 drives the insert assembly 3 to move along a first direction, so that at least the upper part of the insert assembly 3 protrudes from the surface of the mold, and the insert assembly 3 is separable from the ejection mechanism 1. In the second state, the ejection mechanism 1 is connected to the insert assembly 3, and drives the insert assembly 3 to move along a second direction opposite to the first direction, so that the insert assembly 3 is embedded in the mold.

[0061] The present invention uses the driving mechanism 2 to drive the ejection mechanism 1 to switch between the first state and the second state, so that at least the upper part of the insert assembly 3 protrudes from the upper surface of the mold 6 or the insert assembly 3 is embedded in the mold 6, thereby improving the convenience and efficiency of disassembly, assembly and replacement of the insert assembly 3.

[0062] Preferably, in the first state, the ejection mechanism 1 drives the insert assembly 3 to move along the first direction while releasing the connection to the insert assembly 3. Preferably, in the first state, the ejection mechanism 1 drives the insert assembly 3 to move upward, so that the insert assembly 3 is completely protruded from the upper surface of the mold, thereby improving the efficiency of the staff in replacing the insert assembly 3, and avoiding that the insert assembly 3 is not released from the ejection mechanism 1 during the upward movement, resulting in the insert assembly 3 being deformed when the staff replaces the insert assembly 3, especially the insert assembly 3 with high dimensional accuracy requirements, causing damage to the insert assembly 3.

[0063] In the second state, the ejection mechanism 1 first preliminarily locks the insert assembly 3, preliminarily fixes the insert assembly 3, drives the insert assembly 3 to move in a second direction opposite to the first direction, and synchronously locks the insert assembly 3, thereby increasing the tightness of the connection between the insert assembly 3 and the ejection mechanism 1, ensuring that the insert assembly 3 is more firmly connected to the ejection mechanism 1, and preventing the insert assembly 3 from being displaced or falling off during the working process. Preferably, in the second state, the ejection mechanism 1 drives the insert assembly 3 to move downward, and the insert assembly 3 is completely embedded in the mold.

[0064] Preferably, the ejection mechanism 1 includes a rotatable connecting arm 11. Specifically, the rotatable connecting arm 11 has a first end 111 that is loosened or locked with the insert assembly 3, and the first end 111 is loosened from the insert assembly 3 during the upward movement and locked during the downward movement, which improves the automation level of the ejection mechanism 1 and helps to achieve efficient and accurate automated production.

[0065] More preferably, if Figures 6 to 9As shown, during the upward movement of the connecting arm 11 and the insert assembly 3, the connecting arm 11 rotates relative to the insert assembly 3 along the first preset direction, and the first end 111 of the connecting arm 11 gradually changes its connection state with the insert assembly 3, that is, the first end 111 of the connecting arm 11 gradually moves away from the insert assembly 3, that is, the first end 111 of the connecting arm 11 rotates around the rotating portion 112 in a direction away from the insert assembly 3 until the first end 111 of the connecting arm 11 completely releases the insert assembly 3;

[0066] During the downward movement, the connecting arm 11 rotates relative to the insert assembly 3 in a second preset direction opposite to the first preset direction, and the first end 111 of the connecting arm 11 gradually approaches the insert assembly 3, that is, the first end 111 of the connecting arm 11 rotates around the rotating portion 112 in a direction close to the insert assembly 3. As the force exerted by the first end 111 of the connecting arm 11 on the insert assembly 3 is continuously increased, the insert assembly 3 is finally locked. Further, the insert assembly replacement structure of the mold includes a guide member 4 and an elastic member 12. The guide member 4 is mounted on the driving mechanism 2 and abuts against the connecting arm 11. During the downward movement of the connecting arm 11 and the insert assembly 3, the guide member 4 is used to convert a part of the force exerted by the driving mechanism 2 on the ejection mechanism 1 to the force for driving the connecting arm 11 to rotate and lock with the insert assembly 3.

[0067] There are two connecting arms 11, which are arranged on opposite sides of the guide member 4. The elastic component 12 is installed on the connecting arm 11, and the elastic component 12 is used to provide a force for loosening the connecting arm 11 and the insert component 3. It can be understood that the connecting arm 11 is a claw.

[0068] Furthermore, the rotatable connecting arm 11 has a second end 113 away from the first end 111, and the rotating portion 112 of the connecting arm 11 is located between the first end 111 and the second end 113. Preferably, the rotating portion 112 is located in the middle of the connecting arm 11.

[0069] The guide member 4 is located between the rotating portion 112 and the second end 113. Preferably, the guide member 4 is located near the rotating portion 112. The elastic component 12 is located between the first end 111 and the rotating portion 112. Preferably, the elastic component 12 is supported between the two connecting arms 11.

[0070] Specifically, the elastic component 12 includes a support member 121 and an elastic member 122. Two support members 121 are provided, protruding on the surfaces opposite to the two connecting arms 11. The elastic member 122 is installed at the protruding end of the support member 121. There is a spacing between the protruding ends of the two support members 121 for the elastic member 122 to deform under force. It can be understood that the two support members 121 can be staggered, that is, the installation positions of the two support members 121 are not on the same horizontal line.

[0071] As an alternative to the staggered arrangement of the two support members 121, and considering that the elastic member 122 is compressed to generate a stable elastic force, the two support members 121 are arranged relative to each other. It should be noted that the support member 121 includes but is not limited to screws, and the elastic member 122 includes but is not limited to a drum spring.

[0072] Preferably, the ejection mechanism 1 includes an ejection member 13 , which is disposed above the driving mechanism 2 and rotatably connected to the connecting arm 11 , and driven by the driving mechanism 2 to drive the connecting arm 11 to move upward or downward.

[0073] Specifically, the ejector 13 is a plate-like structure of a certain thickness, and notches are arranged on opposite sides of the ejector 13, and the notches are formed by extending inward from the edge of the ejector 13, that is, the notches arranged on opposite sides of the ejector 13 are similar to the empty part in the character "concave", and a first through hole penetrating the thickness of the ejector 13 is arranged at the center. The rotating part 112 of the connecting arm 11 is rotatably mounted on the wall surface forming the notch, and the side of the guide member 4 abutting against the connecting arm 11 protrudes from the notch.

[0074] Furthermore, the wall surfaces constituting the notch of the ejector 13 include a first wall surface, a second wall surface and a third wall surface, the first wall surface and the third wall surface are arranged opposite to each other, the rotating portion 112 of the connecting arm 11 includes a second through hole and a rotating shaft installed in the second through hole, the rotating shaft is rotatably installed on the first wall surface and the third wall surface, and the side of the guide member 4 abutting against the connecting arm 11 protrudes from the second wall surface of the notch.

[0075] Furthermore, the structure of the guide member 4 is similar to that of the ejector 13, and is also a plate-like structure of a certain thickness. Guide grooves are provided on opposite sides of the guide member 4, and the guide grooves extend inward from the edge of the ejector 13. The extension length of the guide grooves is less than the extension length of the notch, ensuring that the connecting arm 11 can abut against the guide groove of the guide member 4. The width of the guide groove is slightly larger than the thickness of the connecting arm 11. When the connecting arm 11 moves upward or downward, it can effectively constrain the position of the connecting arm 11 in the width direction of the guide groove, preventing the connecting arm 11 from being displaced in the width direction of the guide groove.

[0076] Further, the driving mechanism 2 includes a housing 21, a pump body 22 and a connecting rod 23. The interior of the housing 21 is hollow, the wall surface of the pump body 22 is in sealing contact with the inner wall of the housing 21, and can reciprocate in the housing 21. One end of the connecting rod 23 is connected to the pump body 22, and the other end protrudes from the housing 21 and is connected to the first through hole, so as to realize the assembly of the ejector 13 and the driving mechanism 2. It can be understood that a first thread is provided on the inner wall of the through hole, and a second thread is provided on the outer wall of the connecting rod 23 to be screwed with the first thread. The housing 21 includes a cylinder and a cylinder cover sealed on the top of the cylinder. The pump body 22 is a piston provided in the cylinder. A first air inlet and a second air inlet are provided on the peripheral wall of the cylinder. The first air inlet is located above the second air inlet, and the piston is located between the first air inlet and the second air inlet. The first air inlet and the second air inlet are respectively connected to the air intake source outside the cylinder, and the ejector 13 is provided with power by air intake into the cylinder.

[0077] The guide member 4 is sleeved on the outer periphery of the housing 21 and is located between the ejector 13 and the housing 21. It should be noted that a mounting hole with an internal thread is provided at the center of the guide member 4, and an external thread matching the internal thread of the mounting hole is provided on the outer peripheral wall of the cylinder near the top, and the guide member 4 and the cylinder are assembled by screwing the internal and external threads. It should be noted that the mold insert assembly replacement mechanism also includes a mounting frame 5, the housing 21 is fixedly mounted on the mounting frame 5, and the mounting frame 5 is fixedly connected to the bottom of the mold 6.

[0078] It should be noted that the insert assembly 3 includes an insert 31 and a connector 32, and the insert 31 and the connector 32 are detachably connected by bolts that penetrate through the connector 32 and connect the insert 31. That is to say, when the insert 31 needs to be installed, the integrated structure formed by connecting the insert 31 and the connector 32 is installed in the installation groove of the mold 6, and the connector 32 is locked with the first end 111 of the connecting arm 11. It can be understood that when the ejection mechanism 1 ejects the integrated structure formed by connecting the insert 31 and the connector 32, the connector 32 needs to be manually removed from the insert 31, so as to replace another insert 31. Preferably, the connector 32 is a "T"-shaped block, that is, a connector 32 with a "T"-shaped structure.

[0079] The working process of the present invention is described in detail below: when the insert assembly 3 needs to be replaced and removed, the air intake source is controlled to pass compressed air into the shell body 21 through the first air inlet. When the amount of compressed air is sufficient to drive the pump body 22 to move along the bottom of the shell body 21 toward the top of the shell body 21, the pump body 22 drives the connecting rod 23, and the connecting rod 23 drives the ejector 13 to move upward, and the ejector 13 further drives the connecting arm 11 to move upward, and the connecting arm 11 drives the insert assembly 3 to move upward. At this time, the guide member 4 does not provide a force, and the elastic component 12 provides a force to loosen the connecting arm 11 and the insert assembly 3. The first end 111 of the connecting arm 11 rotates relative to the insert assembly 3 around the rotating part 112 of the connecting arm 11 in a direction away from the insert assembly 3. During the rotation, the first end 111 of the connecting arm 11 loosens the insert assembly 3; when the replaced insert assembly 3 needs to be placed in the mounting groove of the mold 6, the air intake source is controlled to pass compressed air into the shell body 21. Compressed air is introduced into the shell 21 through the second air inlet. When the amount of compressed air is sufficient to drive the pump body 22 to move along the top of the shell 21 toward the bottom of the shell 21, the pump body 22 drives the connecting rod 23, and the connecting rod 23 drives the ejection piece 13 to move downward, and further makes the ejection piece 13 drive the connecting arm 11 to move downward. In the process of the connecting arm 11 driving the insert assembly 3 to move downward, the two connecting arms 11 contact with the guide member 4, and the guide member 4 converts a part of the force of the driving mechanism 2 driving the ejection mechanism 1 to move downward into a force to drive the connecting arm 11 to rotate and lock with the insert assembly 3, so that the first end of the connecting arm 11 rotates relative to the insert assembly 3 around the rotating part 112 of the connecting arm 11 in the direction close to the insert assembly 3. When the force provided by the guide member 4 is sufficient to overcome the force provided by the elastic component 12 to loosen the connecting arm 11 and the insert assembly 3, the first end of the connecting arm 11 is locked with the insert assembly 3.

[0080] like Figure 1 As shown, the present invention further provides a mold 6, which is assembled on a base 7. A mounting groove is arranged on the mold 6, and the mounting groove is used to install the insert assembly 3. A replacement structure of the insert assembly is arranged below the mounting groove.

[0081] The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content suggested above without departing from the scope of the technical solution of the present invention. The implementation scheme in the above embodiment can also be further combined or replaced. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the solution of the present invention.

Claims

1. A mold insert component replacement structure, characterized in that: It comprises an ejection mechanism (1) and a driving mechanism (2), The ejection mechanism (1) has a first state and a second state, and the driving mechanism (2) drives the ejection mechanism (1) to switch between the first state and the second state; In the first state, the ejection mechanism (1) drives the insert assembly (3) to move along the first direction, so that at least the upper part of the insert assembly (3) protrudes from the surface of the mold, and the insert assembly (3) is detachable relative to the ejection mechanism (1); In the second state, the ejection mechanism (1) is connected to the insert assembly (3), driving the insert assembly (3) to move along a second direction opposite to the first direction, so that the insert assembly (3) is embedded in the mold.

2. The mold insert assembly replacement structure according to claim 1, characterized in that: In a first state, the ejection mechanism (1) drives the insert assembly (3) to move along a first direction while releasing the connection with the insert assembly (3); In the second state, the ejection mechanism (1) first preliminarily locks the insert assembly (3), and drives the insert assembly (3) to move along a second direction opposite to the first direction to synchronously lock the insert assembly (3); Preferably, in the first state, the ejection mechanism (1) drives the insert assembly (3) to move upward, so that the insert assembly (3) completely protrudes from the upper surface of the mold; Preferably, in the second state, the ejection mechanism (1) drives the insert assembly (3) to move downward, and the insert assembly (3) is completely embedded in the mold.

3. The mold insert assembly replacement structure according to claim 1 or 2, characterized in that: The ejection mechanism (1) comprises: The rotatably connected arm (11) has a first end (111) which is loosened or locked with the insert assembly (3); the first end (111) is loosened with the insert assembly (3) during the upward movement and locked during the downward movement.

4. The mold insert assembly replacement structure according to claim 3, characterized in that: During the upward movement, the connecting arm (11) rotates relative to the insert assembly (3) along a first preset direction, and the first end (111) of the connecting arm (11) releases the insert assembly (3); During the downward movement, the connecting arm (11) rotates relative to the insert assembly (3) along a second preset direction opposite to the first preset direction, and the first end (111) of the connecting arm (11) locks the insert assembly (3).

5. The mold insert assembly replacement structure according to claim 3 or 4, characterized in that: include, The guide member (4) is mounted on the driving mechanism (2) and abuts against the connecting arm (11). When the connecting arm (11) and the insert assembly (3) are moving downward, the guide member (4) is used to convert a part of the force of the driving mechanism (2) driving the ejection mechanism (1) downward into a force for driving the connecting arm (11) to rotate and lock the insert assembly (3). Preferably, the rotatable connecting arm (11) has a second end (113) away from the first end (111), and the rotating portion (112) of the connecting arm (11) is located between the first end (111) and the second end (113); The guide member (4) is located between the rotating portion (112) and the second end (113); Preferably, the guide member (4) is located close to the rotating portion (112).

6. The mold insert assembly replacement structure according to claim 5, characterized in that: Two connecting arms (11) are provided, and are arranged on two opposite sides of the guide member (4); An elastic component (12) is installed on the connecting arm (11), the elastic component (12) is located between the first end (111) and the rotating part (112), and the elastic component (12) is used to provide a force for loosening the connecting arm (11) and the insert component (3); Preferably, the elastic component (12) is supported between the two connecting arms (11).

7. The mold insert assembly replacement structure according to claim 6, characterized in that: The elastic component (12) comprises a supporting member (121) and an elastic member (122); Two support members (121) are provided, protruding on the surfaces opposite to the two connecting arms (11); the elastic member (122) is mounted on the protruding ends of the support members (121); and a spacing is provided between the protruding ends of the two support members (121) for the elastic member (122) to deform under force.

8. The mold insert assembly replacement structure according to any one of claims 5 to 7, characterized in that: The ejection mechanism (1) comprises: The ejector (13) is disposed above the driving mechanism (2) and is rotatably connected to the connecting arm (11). When driven by the driving mechanism (2), the ejector drives the connecting arm (11) to move upward or downward. Preferably, notches are provided on opposite sides of the ejector (22), and the notches are formed by extending inward from the edge of the ejector (22); The rotating part (112) of the connecting arm (11) is rotatably mounted on the wall surface forming the notch; The side of the guide member (4) abutting against the connecting arm (11) protrudes from the notch.

9. The mold insert assembly replacement structure according to any one of claims 1 to 8, characterized in that: The driving mechanism (2) comprises: A housing (21) having a hollow interior; A pump body (22) whose wall surface is in sealing contact with the inner wall of the housing (21) and is capable of reciprocating movement in the housing (21); A connecting rod (23), one end of which is connected to the pump body (22), and the other end of which protrudes from the housing (21) and is connected to the ejector (22); Preferably, the guide member (4) is sleeved on the outer periphery of the shell (21) and is located between the ejector member (13) and the shell (21).

10. A mould, comprising a mounting groove for mounting an insert assembly (3), characterized in that: An insert assembly replacement structure for the mold as described in any one of claims 1-9 is arranged below the mounting groove.

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