Injection mold

Abstract

The utility model belongs to the technical field of injection molding, and relates to an injection mold which comprises a first mold assembly, a pressure bearing part and an ejector pin assembly, and the first mold assembly is provided with a mold cavity; the pressure bearing piece is mounted on the first die assembly; the ejector pin assembly is installed on the first die assembly in a sliding mode and penetrates through the pressure bearing piece. The ejector pin assembly is provided with a bearing part, and the bearing part is located on the side, facing the mold cavity, of the pressure bearing piece and is stopped by the pressure bearing piece so as to be supported by the pressure bearing piece during injection molding in the mold cavity. The bearing part in the injection mold is supported by the pressure-bearing piece at the middle part of the ejector pin assembly, and compared with one end, deviating from the injection molding piece, of the ejector pin assembly, the length of the part, mainly bearing the injection pressure, of the ejector pin assembly can be shortened, so that the distance between the action point of the injection pressure and the supporting point of the ejector rod assembly is shortened; the power arm of the ejector rod assembly is shortened, the bending moment of the ejector rod assembly is reduced, and the possibility that the ejector pin is bent, deformed or shortened due to the overlong ejector pin power arm is reduced.

Description

Technical Field

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

[0002] For injection molded parts made of flexible plastic, they usually have a certain adhesion to the mold cavity, and generally need to be demolded manually or by the injection mold. However, when the injection molding machine is injecting glue, the ejector pin in the traditional injection mold will be deformed by the injection pressure of the injection molding machine, such as shortening and bending, which will cause problems such as excess glue and dents in the injection molded products, reducing the product yield. Utility Model Content

[0003] In view of this, it is necessary to provide an injection mold to solve the technical problem that the ejector pin in the existing injection mold is easy to deform, resulting in a low product yield.

[0004] The present application provides an injection mold, which includes a first mold assembly, a pressure-bearing part and an ejector assembly, wherein the first mold assembly is provided with a mold cavity; the pressure-bearing part is installed on the first mold assembly and is located outside the mold cavity; the ejector assembly is slidably installed on the first mold assembly and penetrates the pressure-bearing part, and the ejector assembly is configured to be driven by an external driving member to extend into the mold cavity, or to retract from the mold cavity, and the ejector assembly is provided with a bearing portion, which is located on a side of the pressure-bearing part facing the mold cavity and is stopped by the pressure-bearing part so as to be supported by the pressure-bearing part during injection molding in the mold cavity.

[0005] In the above-mentioned injection mold, the bearing part is supported by the pressure-bearing part in the middle part of the ejector pin assembly. Compared with the case where the ejector pin assembly is supported at one end away from the injection molded part, the length of the part of the ejector pin assembly that mainly bears the injection pressure can be shortened, thereby shortening the distance between the injection pressure action point and the support point of the ejector pin assembly, that is, shortening the power arm of the ejector pin assembly, reducing the bending moment of the ejector pin assembly, and reducing the possibility of bending, deformation or shortening of the ejector pin due to the excessive length of the ejector pin power arm.

[0006] In at least one embodiment, the ejector pin assembly includes an ejector pin and an ejector pin, the bearing portion is arranged on the ejector pin, one end of the ejector pin facing away from the mold cavity passes through the pressure-bearing member and is connected to the ejector pin; the ejector pin is configured to move by the driving force of an external driving member, and at least one of the ejector pin and the ejector pin is slidably arranged on the first mold assembly.

[0007] In the above embodiment, the ejector pin assembly adopts a two-section structure of an ejector pin and an ejector rod, which can shorten the length of the portion of the ejector pin used to eject the injection molded part, thereby improving the strength of the ejector pin and reducing the risk of bending and deformation of the ejector pin when subjected to injection pressure due to the excessive length of the portion of the ejector pin used to eject the injection molded part.

[0008] In at least one embodiment, the ejector pin is detachably connected to the ejector rod.

[0009] In the above embodiment, the operator can easily detach the ejector pin from the ejector rod, and clean, repair or replace the ejector pin or the ejector rod without replacing the entire ejector pin assembly.

[0010] In at least one embodiment, one of the ejector pin and the ejector rod is provided with a connecting groove, and the other is provided with a connecting portion, and the connecting portion is detachably engaged with the connecting groove.

[0011] In the above embodiment, the operator only needs to insert the connecting part into the connecting groove to realize the connection between the ejector pin and the ejector rod. When the ejector pin assembly needs to be maintained, replaced or adjusted, the operator only needs to remove the connecting part from the connecting groove to perform corresponding operations on the ejector pin and the ejector rod. The operation is simple and convenient, and the assembly efficiency of the injection mold is improved.

[0012] In at least one embodiment, the connecting groove passes through the opposite end of the ejector rod or the ejector pin, and radially passes through the peripheral side of the ejector rod or the ejector pin; the connecting groove includes a first groove and a second groove sequentially connected along a first direction, and a stopper is formed at the junction of the first groove and the second groove; the connecting portion includes a first section and a second section sequentially arranged along the first direction, and the first direction is the direction in which the ejector pin assembly moves and ejects the injection molded part; the first section enters the first groove from the peripheral side of the ejector rod, and the second section enters the second groove, and the second section is stopped by the stopper to prevent the ejector pin and the ejector rod from falling off.

[0013] In the above embodiment, by providing the first section and the first groove cooperating with the first section, and the second section and the second groove cooperating with the second section, not only can the stability and reliability of the connection between the ejector pin and the ejector rod be ensured, so that the ejector pin and the ejector rod maintain a good connection state during the injection molding process, but also the ejector pin and the ejector rod can be easily disassembled and installed, thereby meeting the maintenance and adjustment requirements of the injection mold.

[0014] In at least one embodiment, the first mold assembly is provided with a slide groove, the connecting groove is located in the slide groove within the sliding stroke of the ejector assembly to eject the injection molded part, and the groove wall of the slide groove abuts against the outer peripheral wall of the connecting groove around the axis parallel to the first direction.

[0015] In the above embodiment, the connection groove on the ejector pin is always in the slide groove when the ejector pin assembly slides along the slide groove, which can prevent the connection part from loosening or falling off relative to the connection groove during the sliding process, thereby ensuring the smooth sliding of the ejector pin assembly and the stability of the connection during the injection molding process. In addition, the groove wall of the slide groove can provide support for the ejector pin assembly to prevent the ejector pin assembly from unnecessary displacement or swinging during the sliding process, thereby improving the sliding stability of the ejector pin assembly.

[0016] In at least one embodiment, the bearing portion is symmetrically arranged on the outer periphery of the ejector pin.

[0017] In the above embodiment, the symmetrically arranged bearing parts can not only make the ejector pin bear the force more evenly, thus preventing the ejector pin from tilting and deforming due to uneven force, but also enable the pressure-bearing member to evenly share the injection pressure borne by the ejector pin.

[0018] In at least one embodiment, the first mold assembly includes a template and a mold core with a mold cavity, the template is provided with a first mounting groove, and the mold core is arranged in the first mounting groove; at the bottom of the first mounting groove, the template is provided with a second mounting groove, and the pressure-bearing member is installed in the second mounting groove and abuts against the side of the mold core facing the template.

[0019] In the above embodiment, by providing a first installation groove and a second installation groove, and installing the mold core in the first installation groove and the pressure-bearing member in the second installation groove, the overall structure of the injection mold can be made more compact and the space occupied by the injection mold can be reduced.

[0020] In at least one embodiment, the first mold assembly also includes a guide member, which includes a support member and a sliding plate. The support member is connected to the side of the template facing away from the mold core, the support member is provided with a guide groove, the sliding plate is slidably arranged in the guide groove, and is connected to the end of the ejector pin assembly facing away from the mold cavity; a through hole is provided on the side of the guide member facing away from the template, the through hole is connected to the guide groove, and the through hole is configured to allow an external driving member to pass through.

[0021] In the above embodiment, the external driving member can pass through the through hole to connect with the sliding plate, and drive the sliding plate to slide along the guide groove to achieve sliding control of the ejector assembly. During the sliding process of the ejector assembly, the guide groove can guide the sliding plate to prevent the ejector assembly from deflecting.

[0022] In at least one embodiment, the injection mold further includes a second mold component that cooperates with the first mold component to close the mold cavity.

[0023] In the above embodiment, the injection mold closes the mold cavity by the cooperation of the second mold component and the first mold component, thereby ensuring that the injection material can form an injection molded part in the mold cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an injection mold provided in an embodiment of the present application when the ejector pin assembly is in a non-ejected state;

[0025] Figure 2 yes Figure 1 The schematic diagram of the injection mold shown is when the ejector pin assembly is in the ejection state;

[0026] Figure 3 yes Figure 1 The schematic cross-sectional view of the injection mold along line III-III is shown;

[0027] Figure 4 yes Figure 1 A partially exploded schematic diagram of the structure of the injection mold shown;

[0028] Figure 5 yes Figure 1 Schematic diagram of the exploded structure of the injection mold shown;

[0029] Figure 6 yes Figure 3 A schematic diagram of the structure of the ejector assembly and the pressure-bearing part in the injection mold shown;

[0030] Figure 7 yes Figure 4 A schematic diagram of the structure of the ejector pin assembly in the injection mold shown;

[0031] Figure 8 yes Figure 7 The exploded structural diagram of the ejector pin assembly shown;

[0032] Fig. 9 yes Figure 8 A schematic diagram of the structure of the ejector pin in the ejector pin assembly shown;

[0033] Fig.10 It is a structural schematic diagram of an injection mold provided in one embodiment of the present application.

[0034] Main component symbols

[0035] Injection mold 100

[0036] First mold assembly 10

[0037] Template 11

[0038] First installation groove 111

[0039] Second mounting groove 112

[0040] Mould 12

[0041] Cavity 121

[0042] Guide 13

[0043] Support member 131

[0044] Through hole 1311

[0045] Sliding plate 132

[0046] Guide groove 133

[0047] Chute 14

[0048] Pressure bearing parts 20

[0049] Ejector assembly 30

[0050] Ejector 31

[0051] Connection slot 311

[0052] First slot 3111

[0053] Second slot 3112

[0054] Stopper 3113

[0055] Carrying portion 312

[0056] Ejector 32

[0057] Connection part 321

[0058] The first paragraph 3211

[0059] Second paragraph 3212

[0060] Second mold assembly 40

[0061] External drive 200

[0062] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0063] The following specific embodiments illustrate the implementation of the present application, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Although the description of the present application will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this application are limited to the implementation. On the contrary, the purpose of introducing the application in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present application. In order to provide a deep understanding of the present application, the following description will include many specific details. The present application can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0064] Hereinafter, if used, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more. Positional terms such as "upper", "lower", "left", and "right" are defined relative to the orientation of the components schematically placed in the accompanying drawings. It should be understood that these directional terms are relative concepts. They are used for description and clarification relative to the components, and may change accordingly according to changes in the orientation of the components placed in the accompanying drawings.

[0065] In this application, if used, unless otherwise expressly specified and limited, the term "connection" should be understood in a broad sense, for example, "connection" can be fixed connection, detachable connection, or integrated; can be directly connected or indirectly connected through an intermediate medium. The term "and / or" used herein includes any and all combinations of one or more of the relevant listed items.

[0066] When the following embodiments are described in detail in conjunction with schematic diagrams, for ease of explanation, the diagrams showing the local structures of the devices will not be partially enlarged according to the general scale, and the schematic diagrams are only examples and should not limit the scope of protection of this application.

[0067] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0068] The present application embodiment provides an injection mold 100, such as Figure 1 , Figure 2 and Figure 3 As shown, the injection mold 100 includes a first mold assembly 10, a pressure bearing member 20 and an ejector assembly 30. The first mold assembly 10 is provided with a mold cavity 121, the number of the mold cavity 121 can be one or more, and the mold cavity 121 has a specific shape, which can be rectangular, circular, elliptical, etc. It should be noted that the mold cavity 121 is used to accommodate the plastic material of the injection molded part, that is, the injection molded part is injection molded in the mold cavity 121.

[0069] In addition, the pressure-bearing member 20 is mounted on the first mold assembly 10 and is located outside the mold cavity 121. The ejector assembly 30 is slidably mounted on the first mold assembly 10 and penetrates the pressure-bearing member 20. The ejector assembly 30 is configured to be driven by the external driving member 200 to extend into the mold cavity 121 or retract from the mold cavity 121.

[0070] It can be understood that after the injection molded part is injection molded in the mold cavity 121, the ejector pin assembly 30 is driven by the external driving member 200 to extend into the mold cavity 121 and exert a force on the injection molded part to push the injection molded part out of the mold cavity 121, thereby completing the demolding of the injection molded part; when the injection molded part is demolded, the ejector pin assembly 30 is driven by the external driving member 200 to retract from the mold cavity 121 to its initial position.

[0071] It should be noted that the ejector assembly 30 is located at the initial position before the plastic material is injected into the mold cavity 121. For example, when the ejector assembly 30 is located at the initial position, the end surface of the ejector assembly 30 that is used to extend into or expose the mold cavity 121 is flush with the cavity wall surface of the mold cavity 121 to ensure the integrity of the overall shape of the injection molded part.

[0072] In addition, if Figure 3 As shown, the ejector assembly 30 is provided with a bearing portion 312, which is located on the side of the pressure-bearing member 20 facing the mold cavity 121 and is stopped by the pressure-bearing member 20. Specifically, the bearing portion 312 can be a protruding component such as a boss or a claw. During the injection molding process, the ejector assembly 30 is subjected to the injection pressure and tends to move away from the mold cavity 121. At this time, the pressure-bearing member 20 outside the mold cavity 121 will abut against the bearing portion 312 in the ejector assembly 30 to hinder the movement of the ejector assembly 30 and disperse the injection pressure to the surrounding structure (specifically, the first mold assembly 10).

[0073] In short, the ejector assembly 30 can be supported by the pressure-bearing member 20, and the injection pressure is shared by the pressure-bearing member 20. Thus, the stability and reliability of the ejector assembly 30 are improved, and the possibility of bending or shortening of the ejector assembly 30 is reduced.

[0074] It should be noted that, since the support portion 312 is provided on the side of the ejector assembly 30 facing the mold cavity 121 of the pressure-bearing member 20, and the support portion 312 is located on the side of the ejector assembly 30 close to the mold cavity 121, the support portion 312 is supported by the pressure-bearing member 20 in the middle part of the ejector assembly 30, that is, the ejector assembly 30 is supported in its middle part.

[0075] Compared with the prior art in which the support is provided at one end of the ejector assembly 30 away from the injection molded part, the bearing portion 312 is located on the side of the ejector assembly 30 close to the mold cavity 121, which shortens the length of the portion of the ejector assembly 30 that mainly bears the injection pressure, thereby shortening the distance between the injection pressure application point and the support point of the ejector assembly 30, that is, shortening the power arm of the ejector assembly 30, reducing the bending moment of the ejector assembly 30, and thereby reducing the possibility of deformation of the ejector assembly 30.

[0076] Further, as a specific implementation in some embodiments of the present application, Figure 3 and Figure 6 As shown, the ejector assembly 30 includes an ejector 31 and an ejector rod 32. The bearing portion 312 is disposed on the ejector 31. In order to control the position and movement of the ejector 31 in the mold cavity 121, one end of the ejector 31 away from the mold cavity 121 passes through the pressure-bearing member 20 and is connected to the ejector rod 32. The ejector rod 32 is configured to move under the driving force of the external driving member 200, and the external driving member 200 can be a hydraulic device or a mechanical driving system, as long as it can drive the ejector rod 32 to move.

[0077] In addition, at least one of the ejector pin 31 and the ejector rod 32 is slidably disposed on the first mold assembly 10 . When the external driving member 200 applies a driving force, the ejector rod 32 moves and drives the ejector pin 31 to move, so as to change the position of the ejector pin 31 in the mold cavity 121 .

[0078] In one embodiment, the ejector pin 31 and the ejector rod 32 are both slidably disposed on the first mold assembly 10. After the injection molded part is injection molded in the mold cavity 121, the external driving member 200 first applies a driving force to the ejector rod 32. The ejector rod 32 is forced to move along the first mold assembly 10 toward the mold cavity 121, thereby driving the ejector pin 31 to move along the first mold assembly 10 toward the mold cavity 121, so that the ejector pin 31 applies a force to the injection molded part to push the injection molded part out of the mold cavity 121, thereby completing the demolding of the injection molded part.

[0079] Of course, in other embodiments, the ejector pin 31 is slidably disposed on the first mold assembly 10 alone, or the ejector rod 32 is slidably disposed on the first mold assembly 10 alone. The present application does not limit this, and those skilled in the art can choose according to actual conditions.

[0080] It should be noted that, compared with the integrated ejector in the existing injection mold, the injection mold 100 adopts a two-section ejector assembly 30 including the ejector 31 and the ejector rod 32, which can reduce the length of the key part of the ejector 31 (specifically the part used to eject the injection molded part), thereby reducing the risk of bending and deformation of the ejector 31 when subjected to injection pressure due to the excessive length of the key part of the ejector 31.

[0081] Further, as a specific implementation in some embodiments of the present application, Figure 3 , Figure 5 and Figure 7As shown, the ejector pin 31 and the ejector rod 32 are detachably connected. On the one hand, the operator can easily detach the ejector pin 31 and the ejector rod 32, and clean, repair or replace the ejector pin 31 or the ejector rod 32 without replacing the entire ejector pin assembly 30. On the other hand, the flexibility of the injection mold 100 can be enhanced, and the operator can adjust the length or shape of the ejector pin 31 according to the specific injection molding requirements to obtain a better ejection effect. For example, for an injection molded part with a larger depth, a longer ejector pin 31 can be replaced, and for an injection molded part with a smaller depth, a shorter ejector pin 31 can be replaced.

[0082] In one embodiment, one of the ejector pin 31 and the ejector rod 32 is provided with a connecting groove 311 , and the other is provided with a connecting portion 321 , and the connecting portion 321 is detachably connected to the connecting groove 311 to achieve a detachable connection between the ejector pin 31 and the ejector rod 32 .

[0083] It can be understood that when the ejector assembly 30 needs to be assembled, the operator only needs to insert the connecting portion 321 into the connecting groove 311 to achieve the connection between the ejector 31 and the ejector rod 32; when the ejector assembly 30 needs to be maintained, replaced or adjusted, the operator only needs to remove the connecting portion 321 from the connecting groove 311 to perform corresponding operations on the ejector 31 and the ejector rod 32.

[0084] In one embodiment, if Figure 8 and Fig. 9 As shown, the ejector pin 31 is provided with a connecting groove 311 , which passes through one end of the ejector pin 31 facing the ejector rod 32 and radially passes through the circumference of the ejector pin 31 . The ejector rod 32 is provided with a connecting portion 321 at one end facing the ejector pin 31 .

[0085] Specifically, the first direction is defined as the direction in which the ejector assembly 30 moves and ejects the injection molded part. The connecting groove 311 includes a first groove 3111 and a second groove 3112, which are sequentially arranged along the first direction at one end of the ejector 31 facing the ejector rod 32, and a stopper 3113 for limiting the moving range of the connecting portion 321 is formed at the junction between the first groove 3111 and the second groove 3112.

[0086] The connecting portion 321 includes a first section 3211 and a second section 3212, which are sequentially arranged along the first direction at one end of the ejector pin 32 facing the ejector pin 31. When the connecting portion 321 is inserted into the connecting groove 311, the first section 3211 enters the first groove 3111 from the peripheral side of the ejector pin 31, and the second section 3212 enters the second groove 3112. The second section 3212 will be blocked by the stopper 3113 to prevent the ejector pin 31 and the ejector pin 32 from falling off.

[0087] It should be noted that, by adopting the connection mode of the connection groove 311 and the connection part 321 , the ejector pin 31 and the ejector rod 32 can maintain a good connection state during the injection molding process, so as to ensure the stability and reliability of the connection between the ejector pin 31 and the ejector rod 32 .

[0088] In another embodiment, a connecting groove 311 is provided at one end of the ejector rod 32 facing the ejector pin 31, and a connecting portion 321 matching the connecting groove 311 is provided at one end of the ejector pin 31 facing the ejector rod 32. Of course, in other embodiments, the ejector pin 31 and the ejector rod 32 may also adopt other detachable connection structures such as snap connection, which is not limited in the present application, and those skilled in the art may select according to actual conditions.

[0089] Further, as a specific implementation in some embodiments of the present application, Figure 3 As shown, the first mold assembly 10 is provided with a slide groove 14, which extends along the first direction and is used to guide the sliding of the ejector assembly 30 when ejecting the injection molded part. The connecting groove 311 is located in the slide groove 14 within the sliding stroke of the ejector assembly 30 to eject the injection molded part, and the groove wall of the slide groove 14 abuts against the outer peripheral wall of the ejector 31 corresponding to the connecting groove 311 around the axis parallel to the first direction.

[0090] It can be understood that when the ejector assembly 30 slides along the slide groove 14, the connecting groove 311 on the ejector 31 is always in the slide groove 14, and the ejector 31 is always against the groove wall of the slide groove 14 during the sliding process. In this way, the groove wall of the slide groove 14 can provide support for the ejector assembly 30, preventing the ejector assembly 30 from unnecessary displacement or swinging during the sliding process, thereby improving the sliding stability of the ejector assembly 30; secondly, it can prevent the connection portion 321 from loosening or falling off relative to the connecting groove 311 during the sliding process, ensuring the smooth sliding of the ejector assembly 30 during the injection molding process and the stability of the connection.

[0091] Further, as a specific implementation in some embodiments of the present application, Figure 3 and Fig. 9 As shown, the bearing part 312 is symmetrically arranged on the outer periphery of the ejector pin 31. It should be noted that the symmetrically arranged bearing part 312 can not only make the ejector pin 31 bear the force more evenly, avoiding the ejector pin 31 from tilting and deforming due to uneven force, but also make the pressure bearing part 20 evenly share the injection pressure borne by the ejector pin 31.

[0092] Further, as a specific implementation in some embodiments of the present application, Figure 3 , Figure 4 and Figure 5As shown, in order to make the overall structure of the injection mold 100 more compact and reduce its occupied space, the first mold assembly 10 includes a template 11 and a mold core 12 provided with the above-mentioned mold cavity 121, and the template 11 is provided with a first mounting groove 111 adapted to the mold core 12, and the mold core 12 is arranged in the first mounting groove 111.

[0093] At the bottom of the first mounting groove 111, the template 11 is provided with a second mounting groove 112 adapted to the pressure-bearing member 20, and the pressure-bearing member 20 is installed in the second mounting groove 112. The pressure-bearing member 20 abuts against the side of the mold core 12 facing the template 11, so that the pressure-bearing member 20 can maintain close contact with the mold core 12 and provide the required support and stability.

[0094] Further, as a specific implementation in some embodiments of the present application, Figure 3 , Figure 4 and Figure 5 As shown, in order to guide and control the ejector assembly 30 and improve the performance of the injection mold 100 , the first mold assembly 10 further includes a guide member 13 , and the guide member 13 includes a support member 131 and a sliding plate 132 .

[0095] The support member 131 is connected to the side of the template 11 away from the mold core 12, and the support member 131 is provided with a guide groove 133. The sliding plate 132 is arranged in the guide groove 133 and connected to the end of the ejector assembly 30 away from the mold cavity 121. In addition, the side of the guide member 13 away from the template 11 is also provided with a through hole 1311, and the through hole 1311 is connected to the guide groove 133. The through hole 1311 is designed to allow the external driving member 200 to pass through, that is, the external driving member 200 can act on the sliding plate 132 through the through hole 1311.

[0096] It can be understood that after the injection molded part is injection molded in the mold cavity 121, the external driving member 200 applies a driving force to the sliding plate 132, and the sliding plate 132 is forced to move along the guide groove 133 toward the mold cavity 121, thereby driving the ejector rod 32 to move, and the ejector rod 32 in turn drives the ejector pin 31 to move, so that the force applied by the ejector pin 31 to the injection molded part pushes the injection molded part out of the mold cavity 121, thereby completing the demolding of the injection molded part.

[0097] In one embodiment, if Fig.10 As shown, the injection mold 100 further includes a second mold assembly 40 , which cooperates with the first mold assembly 10 and closes the mold cavity 121 to ensure that the injection material can form an injection molded part in the mold cavity 121 .

[0098] Specifically, when injection molding is required, the technician first installs the second mold assembly 40 on the first mold assembly 10 and closes the mold cavity 121. Then, the molding material is injected into the mold cavity 121 through an external injection molding machine. The molding material solidifies in the mold cavity 121 to form an injection molded part, thus completing the injection molding.

[0099] It should be noted that after the injection molding is completed, the technician needs to separate the second mold assembly 40 from the first mold assembly 10 and then demold the injection molded part through the ejector assembly 30 .

[0100] The above description is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the disclosure scope of the present application.

Claims

1. An injection mold, characterized in that: The injection mold comprises: a first mold assembly, the first mold assembly being provided with a mold cavity; A pressure-bearing member, which is mounted on the first mold assembly and is located outside the mold cavity; An ejector pin assembly is slidably mounted on the first mold assembly and penetrates the pressure-bearing member; the ejector pin assembly is configured to be driven by an external driving member to extend into the mold cavity, or to retract from the mold cavity; the ejector pin assembly is provided with a bearing portion, which is located on a side of the pressure-bearing member facing the mold cavity and is stopped by the pressure-bearing member so as to be supported by the pressure-bearing member during injection molding in the mold cavity.

2. The injection mold according to claim 1, characterized in that: The ejector assembly comprises an ejector rod and an ejector pin, the bearing portion is arranged on the ejector pin, and one end of the ejector pin away from the mold cavity passes through the pressure-bearing member and is connected to the ejector rod; The ejector pin is configured to be moved by a driving force of an external driving member, and at least one of the ejector pin and the ejector pin is slidably disposed on the first mold assembly.

3. The injection mold according to claim 2, characterized in that: The ejector pin is detachably connected to the ejector rod.

4. The injection mold according to claim 3, characterized in that: One of the ejector pin and the ejector rod is provided with a connecting groove, and the other is provided with a connecting portion, and the connecting portion is detachably matched with the connecting groove.

5. The injection mold according to claim 4, characterized in that: The connecting groove passes through the opposite end of the ejector rod or the ejector pin, and passes through the peripheral side of the ejector rod or the ejector pin in the radial direction; The connecting groove comprises a first groove and a second groove which are sequentially connected along a first direction, and a stopper is formed at the junction of the first groove and the second groove; The connecting portion comprises a first section and a second section arranged in sequence along a first direction, wherein the first direction is a direction in which the ejector assembly moves and ejects the injection molded part; The first section enters the first groove from the peripheral side of the ejector pin, the second section enters the second groove, and the second section is stopped by the stopper to prevent the ejector pin and the ejector pin from falling off.

6. The injection mold according to claim 5, characterized in that: The first mold assembly is provided with a slide groove, the connecting groove is located in the slide groove within the sliding stroke of the ejector assembly to eject the injection molded part, and the groove wall of the slide groove abuts against the outer peripheral wall of the connecting groove around the axis parallel to the first direction.

7. The injection mold according to claim 2, characterized in that: The bearing portion is symmetrically arranged on the outer periphery of the ejector pin.

8. The injection mold according to claim 1, characterized in that: The first mold assembly includes a template and a mold core provided with the mold cavity, the template is provided with a first mounting groove, and the mold core is arranged in the first mounting groove; The template is provided with a second installation groove at the bottom of the first installation groove, and the pressure-bearing member is installed in the second installation groove and abuts against a side of the mold core facing the template.

9. The injection mold according to claim 8, characterized in that: The first mold assembly further includes a guide member, the guide member includes a support member and a sliding plate, the support member is connected to a side of the mold plate away from the mold core, the support member is provided with a guide groove, the sliding plate is slidably disposed in the guide groove and connected to an end of the ejector pin assembly away from the mold cavity; A through hole is provided on a side of the guide member facing away from the template, the through hole is connected to the guide groove, and the through hole is configured to allow an external driving member to pass through.

10. The injection mold according to claim 1, characterized in that: The injection mold further comprises a second mold component, which cooperates with the first mold component and closes the mold cavity.

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