Injection mold

Abstract

The injection mold comprises a lower mold body, a supporting structure and a clamping structure, the lower mold body comprises a cavity, a first mounting hole communicating with the cavity in the height direction and a second mounting hole communicating with the first mounting hole in the horizontal direction, and the supporting structure is slidably arranged in the first mounting hole; the top end of the supporting structure extends into the cavity to be connected with the insert, the clamping structure is arranged in the second mounting hole in a sliding mode, and one end of the clamping structure extends out of the second mounting hole and extends into the clamping groove to be connected with the supporting structure in a limiting mode. According to the injection mold, the insert is supported below the insert, so that the appearance of a product subjected to injection molding on the outer side of the upper surface of the insert is complete, and the attractiveness of the product is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of injection molding, and more particularly to an injection mold. BACKGROUND

[0002] In the field of injection molding, in order to prevent the displacement of inserts caused by the injection liquid during the injection process, a support structure is usually added to the upper mold and the lower mold respectively to support and limit the upper and lower positions of the inserts, so that the inserts are fixed in the cavity of the mold. However, the structure of the support and limitation of the upper and lower positions of the inserts is complex, and after the injection is completed, holes are generated on the appearance surface of the injection product, which seriously affects the appearance of the product. SUMMARY

[0003] Therefore, the injection mold provided by the embodiments of the present application has a simple structure and a complete appearance of the product after injection.

[0004] The injection mold provided by the embodiments of the present application comprises: a lower mold having a cavity, a first mounting hole and at least one second mounting hole, the first mounting hole and the second mounting hole being located below the cavity, the first mounting hole being communicated with the cavity along the height direction, and the second mounting hole being communicated with the first mounting hole along the horizontal direction; a support structure slidingly arranged in the first mounting hole, the top end of the support structure extending into the cavity and being connected with an insert, and the side surface of the support structure being provided with a clamping groove; at least one clamping structure slidingly arranged in the corresponding second mounting hole, one end of the clamping structure extending out of the second mounting hole and extending into the clamping groove and being limitingly connected with the support structure.

[0005] Optionally, the support structure comprises a connecting portion and a supporting portion connected in the height direction, the cross-sectional area of the connecting portion being less than or equal to the cross-sectional area of the supporting portion, the supporting portion being located in the first mounting hole, the connecting portion being located in the cavity and being connected with the insert, and the side surface of the supporting portion being provided with the clamping groove.

[0006] Optionally, the connecting portion is a screw rod with external threads.

[0007] Optionally, the first mounting hole is a cylindrical hole, the supporting portion is a cylindrical rod, and the clamping groove is arranged along the entire circumferential side surface of the cylindrical rod.

[0008] Optionally, the clamping groove is in the form of a circular arc on the axis cross-section of the cylindrical rod.

[0009] Optionally, the support structure further comprises a guide portion connected to the bottom end of the supporting portion.

[0010] Optionally, the clamping structure comprises a fixing member, a clamping member and an elastic element, the fixing member is fixed at one end of the second mounting hole away from the first mounting hole, the elastic element is connected between the clamping member and the fixing member, and the elastic element pushes the clamping member to extend out of the second mounting hole through pre-press elastic force.

[0011] Optionally, the clamping member comprises a moving part and a clamping part, the clamping part is arranged at one end of the moving part close to the first mounting hole, and the shape of the clamping part is matched with the shape of the clamping groove.

[0012] Optionally, the clamping part is in the shape of a spherical cap, and the clamping groove is in the shape of a circular arc, and the diameter of the spherical cap is smaller than the diameter of the circular arc.

[0013] Optionally, the injection mold further comprises an ejection structure, and the ejection structure is movably arranged in the first mounting hole and below the supporting structure.

[0014] The injection mold comprises a lower mold, a supporting structure and a clamping structure, the lower mold comprises a cavity, a first mounting hole in communication with the cavity in the height direction, and a second mounting hole in communication with the first mounting hole in the horizontal direction, the supporting structure is slidably arranged in the first mounting hole, and the top end of the supporting structure extends into the cavity and is connected with an insert, the clamping structure is slidably arranged in the second mounting hole, one end of the clamping structure extends out of the second mounting hole and extends into the clamping groove and is limitingly connected with the supporting structure. The injection mold supports the insert from below, so that the appearance of the product injected outside the upper surface of the insert is complete, and the appearance of the product is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] The above and other objects, features and advantages of the present application will become more apparent from the following description of embodiments of the present application, taken in conjunction with the accompanying drawings, in which: Figure 1 is a structural schematic diagram of the injection mold of the embodiment of the present application; Figure 2 is a sectional view of the injection mold of the embodiment of the present application; Figure 3 is an exploded schematic diagram of the injection mold of the embodiment of the present application; Figure 4 is a structural schematic diagram of the supporting structure of the embodiment of the present application; Figure 5 is a structural schematic diagram of the clamping member of the embodiment of the present application; Figure 6 is a sectional view of the lower mold of the embodiment of the present application; Figure 7 is a structural schematic diagram of the connection between the supporting structure and the insert of the embodiment of the present application.

[0016] BRIEF DESCRIPTION OF DRAWINGS 1 - lower mold; 11 - cavity; 12 - first mounting hole; 13 - second mounting hole; 2 - support structure; 21 - connecting part; 22 - supporting part; 221 - clamping groove; 23 - guide part; 3 - clamping structure; 31 - fixing part; 32 - clamping part; 321 - moving part; 322 - clamping part; 33 - elastic element; 4 - ejection structure; Z - height direction; X - horizontal direction; A - insert. DETAILED DESCRIPTION

[0017] The present application is described in the following based on examples, but the present application is not limited to these examples only. In the following detailed description of the present application, some specific details are described in detail. The present application can also be fully understood without the description of these details by those skilled in the art. In order to avoid obscuring the essence of the present application, well-known methods, processes, procedures, elements and circuits are not described in detail.

[0018] In addition, those of ordinary skill in the art will understand that the drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale.

[0019] Unless the context clearly requires otherwise, throughout the description, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in the sense of "including, but not limited to".

[0020] In the description of the present application, it should be understood that the terms "first", "second", etc. are only for the purpose of description and cannot be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise stated, the meaning of "multiple" is two or more.

[0021] As shown in Figures 1-3 , the injection mold comprises a lower mold 1, a support structure 2 and a clamping structure 3. As shown in Figure 6 , the lower mold 1 is provided with a cavity 11, a first mounting hole 12 and a second mounting hole 13. Among them, the cavity 11 is arranged on the top surface of the lower mold 1, the first mounting hole 12 and the second mounting hole 13 are both located below the cavity 11, the first mounting hole 12 is arranged in communication with the cavity 11 along the height direction Z, and the second mounting hole 13 extends along the horizontal direction X and is in lateral communication with the first mounting hole 12.

[0022] In this embodiment, the cavity 11 is used to install the insert A, and at least part of the cavity of the product to be injection molded is formed between the cavity 11 and the outer side surface of the insert A, so that the injection molding can be performed on the outer side surface of the insert A, thereby forming the injection molded product wrapping the insert A.

[0023] As shown in Figure 2As shown, the support structure 2 is slidably installed in the first mounting hole 12, and the clamping structure 3 is slidably installed in the second mounting hole 13. The top end of the support structure 2 can extend from the first mounting hole 12 into the cavity 11, thereby connecting with the insert A within the cavity 11. One end of the clamping structure 3 can extend from the second mounting hole 13 into the first mounting hole 12, and is connected to the support structure 2 for a limiting connection. Thus, with the cooperation of the support structure 2 and the clamping structure 3, the insert A is fixed within the cavity 11.

[0024] As described above, the support structure 2 is connected to the inner side of the insert A to support and fix the insert A, thereby fixing the position of the insert A during injection molding. At the same time, for products that are injection molded on the outer side of the insert, the appearance is neat and without holes, improving the aesthetics of the injection molded product.

[0025] like Figure 4 As shown, the support structure 2 includes a connecting part 21 and a support part 22 connected vertically along the height direction Z. The support part 22 is slidably installed within the first mounting hole 12, and the connecting part 21 extends into the cavity 11 to connect with the insert A. The clamping structure 3 is used to limit the connection with the support part 22, thereby fixing the support structure 2 and its top insert A, preventing the insert A from being washed away during the glue injection process.

[0026] In one embodiment, the connecting part 21 is a threaded rod with external threads. Correspondingly, the insert A is provided with a threaded hole of a suitable size. The support structure 2 and the insert A can be detachably connected together by a threaded connection. The threaded connection method is simple and easy to implement.

[0027] In other embodiments, the connecting part 21 and the insert A can also be connected by an interference fit between a hole and a post. That is, one of the connecting part 21 and the insert A is provided with a connecting hole, and the other is provided with a connecting post that interferes with the connecting hole. In addition, the connecting part 21 and the insert A can also be connected by any other detachable method, which will not be described in detail here.

[0028] In a preferred embodiment, the cross-sectional area of ​​the connecting portion 21 is less than or equal to the cross-sectional area of ​​the supporting portion 22. That is, the projection of the connecting portion 21 onto the horizontal plane lies within the projection of the supporting portion 22 onto the horizontal plane. Thus, as needed, after part of the connecting portion 21 moves into the first mounting hole 12, the clamping structure 3 and the supporting portion 22 are connected in a limiting manner to fix the insert A.

[0029] like Figure 4 As shown, a slot 221 is provided on the side of the support structure 2, specifically on the side of the support part 22. One end of the clamping structure 3 extends into the slot 221, preventing the support structure 2 from moving up and down, thereby achieving a limiting connection with the support structure 2.

[0030] It should be noted that the structure of the clamping groove 221 is matched with the end structure of the clamping structure 3 extending into the clamping groove 221, and the number and position of the clamping groove 221 correspond to the number and position of the clamping structure 3, that is, the number and position of the clamping structure 3 correspond to the number and position of the second mounting hole 13, so that all the clamping structures 3 can be clamped and limited by the support structure 2 at the same time to provide balanced and sufficient clamping force to prevent the support structure 2 from moving in the first mounting hole 12.

[0031] Among them, in order to improve the stability of the support part 22 moving in the first mounting hole 12, the support part 22 and the first mounting hole 12 are provided in a matched structure, such as circular, square, triangular, etc.

[0032] Preferably, the clamping groove 221 is in the form of a circular arc in the axial cross section of the support part 22, or a groove with a beveled lower side away from the connecting part 21. When the support structure 2 moves upward, the clamping groove 221 can apply a lateral thrust to the end of the clamping structure 3, so that the clamping structure 3 retracts into the second mounting hole 13, thereby allowing the support structure 2 to move upward or out smoothly.

[0033] In a preferred embodiment, the first mounting hole 12 is provided as a cylindrical hole, the support part 22 is provided as a cylindrical rod with a size matched, and the clamping groove 221 is provided as an annular groove along the entire circumference of the outer circumferential surface of the cylindrical rod. It should be noted that when the clamping groove 221 is provided as the above-mentioned annular groove, the clamping structure 3 is two or more, and all the second mounting holes 13 are arranged around the first mounting hole 12, so that all the clamping structures 3 are arranged around the support structure 2. The ends of all the clamping structures 3 can simultaneously extend into the same clamping groove 221, thereby providing balanced and sufficient clamping force.

[0034] Among them, when the support part 22 is provided as a cylindrical rod and the clamping groove 221 is provided as an annular groove, the support part 22 extends into the first mounting hole 12 and connects with the clamping structure 3, without considering the rotation angle of the support part 22 and the clamping groove 221, only considering the position of the insert A in the cavity 11.

[0035] As shown in Figure 4 The support structure 2 further includes a guide part 23 connected to the bottom end of the support part 22. The guide part 23 is used to push the clamping structure 3 to move inwardly into the second mounting hole 13 when the support structure 2 is installed in the first mounting hole 12 from top to bottom, so that after the support structure 2 extends to the corresponding position, the clamping structure 3 is reset to extend into the clamping groove 221 to achieve limiting connection. Among them, the guide part 23 can be provided in the form of a spherical cap or circumferentially provided with a chamfer or a roundness, etc.

[0036] Preferably, the connecting portion 21, the supporting portion 22 and the guiding portion 23 are integrally formed.

[0037] In the embodiment, the lower mold 1 is provided with at least one second mounting hole 13, and the number of the clamping structures 3 is the same as that of the second mounting holes 13. One clamping structure 3 is installed in each second mounting hole 13. When the lower mold 1 includes two or more second mounting holes 13, all the second mounting holes 13 are arranged around the first mounting hole 12 and are communicated, so that all the clamping structures 3 can be connected to the supporting structure 2 from different positions, improving the balance and stability of the limiting connection.

[0038] As shown in Figure 2 and Figure 3 , the clamping structure 3 includes a fixing member 31, a clamping member 32 and an elastic element 33. The fixing member 31 is fixed at one end of the second mounting hole 13 away from the first mounting hole 12, and the elastic element 33 is connected between the clamping member 32 and the fixing member 31. The elastic element 33 pushes the clamping member 32 to extend out of the second mounting hole 13 by pre-pressing elastic force. When the supporting structure 2 moves downward in the first mounting hole 12, the bottom end of the supporting structure 2 (i.e. the guiding portion 23) pushes the clamping member 32 to move into the second mounting hole 13 (at this time, the clamping member 32 compresses the elastic element 33), and opens the channel so that the supporting structure 2 can continue to move downward; when the supporting structure 2 gradually moves to the position where the clamping groove 221 is opposite to the second mounting hole 13, the elastic element 33 pushes the clamping member 32 to reset and extend out of the second mounting hole 13 to extend into the clamping groove 221, thereby achieving the limiting connection with the supporting structure 2.

[0039] In other embodiments, the second mounting hole 13 is provided as a blind hole, and the elastic element 33 is connected at both ends to the side wall of the second mounting hole 13 and the clamping member 32.

[0040] As shown in Figure 5 , the clamping member 32 includes a moving portion 321 and a clamping portion 322, and the clamping portion 322 is arranged at one end of the moving portion 321 close to the first mounting hole 12. The moving portion 321 is preferably arranged to be adapted to the shape of the second mounting hole 13, improving the stability of the movement of the clamping member 32. The shape and size of the clamping portion 322 are adapted to those of the clamping groove 221, so that the clamping portion 322 can extend into the clamping groove 221 to achieve the limiting connection.

[0041] The clamping portion 322 can be arranged in a spherical cap shape or circumferentially arranged in a chamfered or rounded shape, etc. The above-mentioned shapes of the clamping portion 322 can achieve the limiting connection with the clamping groove 221. At the same time, the shape of the clamping portion 322 can cooperate with the guiding portion 23 to achieve the movement of the clamping portion 322, etc.

[0042] In a preferred embodiment, the clamping portion 322 is provided in a spherical cap shape, and the clamping groove 221 is provided in an axis cross-section in a circular arc shape, and the diameter of the spherical cap shape is smaller than the diameter of the circular arc shape. The above structure is convenient to realize, and the clamping is more stable.

[0043] As shown in Figure 2 and Figure 3 , the injection mold further comprises an ejection structure 4 movably arranged in the first mounting hole 12 and below the support structure 2. When the ejection structure 4 is pushed to move upward in the first mounting hole 12, it can push the support structure 2 to move upward, so as to push the insert A at the top of the support structure 2 and the injection molded part outside the insert A (i.e. the injection molded product) out of the cavity 11, facilitating the taking out of the injection molded product. During the upward movement of the support structure 2, the clamping groove 221 can exert a lateral pushing force on the clamping structure 3, so that the clamping structure 3 is withdrawn from the clamping groove 221, and the support structure 2 can smoothly move upward, thereby pushing the injection molded product out of the cavity 11. Alternatively, the ejection structure 4 is provided in a rod shape matched with the first mounting hole 12, for improving the stability of movement.

[0044] Further, the injection mold further comprises a pushing assembly arranged below the lower mold 1 and connected with the ejection structure 4, and a reset element which can be arranged between the lower mold 1 and the pushing assembly. The pushing assembly can move upward under the action of the injection molding machine, thereby pushing the ejection structure 4 to move upward. The reset element can play a buffering role, ensuring the stable upward movement of the pushing assembly. When the driving of the injection molding machine is removed, the reset element can reset the pushing assembly and the ejection structure 4 to move downward.

[0045] The injection mold further comprises an upper mold arranged above the lower mold 1, which is used to form an injection cavity together with the lower mold 1. The insert A is fixed in the injection cavity by the support structure 2, and the product is formed by injection in the injection cavity.

[0046] In use of the injection mold of the present embodiment, the support structure 2 is first connected with the insert A as a whole (as shown in Figure 7 , and then the support structure 2 is installed in the first mounting hole 12 from top to bottom, and is clamped by the clamping structure 3, so as to fix the insert A in the cavity 11. After the injection filling is completed, the ejection structure 4 is controlled to eject the support structure 2 and the injection molded product out of the cavity 11, and then the injection molded product is detached from the support structure 2, and the support structure 2 can be recycled for next use.

[0047] The injection mold of the embodiment comprises a lower mold, a supporting structure and a clamping structure, the lower mold comprises a cavity, a first mounting hole communicated with the cavity in the height direction and a second mounting hole communicated with the first mounting hole in the horizontal direction, the supporting structure is slidingly arranged in the first mounting hole, and the top end of the supporting structure extends into the cavity and is connected with the insert, the clamping structure is slidingly arranged in the second mounting hole, one end of the clamping structure extends out of the second mounting hole and extends into the clamping groove and is limitingly connected with the supporting structure. The injection mold supports the insert from below, so that the appearance of the product injected outside the surface of the insert is complete, and the appearance of the product is improved.

[0048] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An injection mold, characterized in that, The injection mold includes: The lower mold (1) has a cavity (11), a first mounting hole (12) and at least one second mounting hole (13). The first mounting hole (12) and the second mounting hole (13) are both located below the cavity (11). The first mounting hole (12) communicates with the cavity (11) along the height direction (Z), and the second mounting hole (13) communicates with the first mounting hole (12) along the horizontal direction (X). The support structure (2) is slidably disposed in the first mounting hole (12). The top end of the support structure (2) extends into the cavity (11) and connects with the insert (A). The side of the support structure (2) is provided with a slot (221). At least one clamping structure (3) is slidably disposed in the corresponding second mounting hole (13), one end of the clamping structure (3) extends out from the second mounting hole (13) and extends into the slot (221) to be limited and connected to the support structure (2).

2. The injection mold according to claim 1, characterized in that, The support structure (2) includes a connecting part (21) and a support part (22) connected vertically along the height direction (Z). The cross-sectional area of ​​the connecting part (21) is less than or equal to the cross-sectional area of ​​the support part (22). The support part (22) is located in the first mounting hole (12). The connecting part (21) is located in the cavity (11) and connected to the insert (A). The side of the support part (22) is provided with the slot (221).

3. The injection mold according to claim 2, characterized in that, The connecting part (21) is a screw with external threads.

4. The injection mold according to claim 2, characterized in that, The first mounting hole (12) is a cylindrical hole, the support part (22) is a cylindrical rod, and the slot (221) is provided along the entire circumference of the outer peripheral side of the cylindrical rod.

5. The injection mold according to claim 4, characterized in that, The slot (221) is arc-shaped on the axial section of the cylindrical rod.

6. The injection mold according to claim 2, characterized in that, The support structure (2) also includes a guide (23) connected to the bottom end of the support (22).

7. The injection mold according to claim 1, characterized in that, The clamping structure (3) includes a fixing member (31), a clamping member (32) and an elastic element (33). The fixing member (31) is fixed at one end of the second mounting hole (13) away from the first mounting hole (12). The elastic element (33) is connected between the clamping member (32) and the fixing member (31). The elastic element (33) pushes the clamping member (32) out of the second mounting hole (13) by a pre-compression force.

8. The injection mold according to claim 7, characterized in that, The clamping member (32) includes a moving part (321) and a snap-fit ​​part (322). The snap-fit ​​part (322) is disposed at one end of the moving part (321) near the first mounting hole (12). The shape of the snap-fit ​​part (322) is adapted to the shape of the slot (221).

9. The injection mold according to claim 8, characterized in that, The snap-fit ​​part (322) is spherical, and the slot (221) is arc-shaped. The diameter of the spherical part is smaller than the diameter of the arc.

10. The injection mold according to claim 1, characterized in that, The injection mold also includes an ejector structure (4), which is movably disposed within the first mounting hole (12) and located below the support structure (2).

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