Injection mold
By introducing movable positioning inserts and limiting components into the injection mold, the problem of difficult positioning of small parts is solved, the injection efficiency and precision are improved, and the product is ensured to be stably positioned in the mold and intact during the demolding process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FU TAI HUA IND SHENZHEN
- Filing Date
- 2025-04-22
- Publication Date
- 2026-06-16
Smart Images
Figure CN224360570U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of injection molding technology, and in particular to an injection mold. Background Technology
[0002] In the production of precision equipment, injection molding is often used to form products from small parts, allowing the finished product to partially enclose the smaller components. During injection molding, a robotic arm places the small parts into positioning holes within the injection mold for accurate positioning. However, due to the complex internal structure of the injection mold, it is difficult to quickly place the small parts into the preset positions, leading to prolonged overall operation time and reduced injection molding efficiency. Furthermore, small parts are prone to wobbling and shifting during injection, further reducing injection precision. Utility Model Content
[0003] In view of the above situation, it is necessary to provide an injection mold to improve injection efficiency and precision.
[0004] This application provides an injection mold, including a fitted upper mold assembly and a lower mold assembly, wherein the lower mold assembly includes:
[0005] The lower mold component is arranged correspondingly to the upper mold assembly along the mold opening direction;
[0006] A molded part is fixedly disposed on the lower mold component, and the molded part has a molding groove on the side facing the upper mold assembly; and
[0007] Multiple positioning inserts are alternately arranged in sequence on the lower mold component. Each positioning insert is movable along the mold opening direction and includes an insert component and a limiting component. The insert component is movably inserted into the lower mold component along the mold opening direction. The side of the insert component facing the upper mold assembly is provided with a positioning groove. The positioning groove is connected to the molding groove to form the molding cavity of the injection molded product. The positioning groove is used to position small parts. The limiting component is inserted into the positioning groove along a vertical direction perpendicular to the mold opening direction. The limiting component is connected to the insert component and is used to abut the small part against the groove wall of the positioning groove along the vertical direction of the mold opening direction.
[0008] When using the above-mentioned injection mold, firstly, the small part is placed in the positioning groove so that the positioning groove positions the small part. The limiting member holds the small part against the groove wall to limit the position and orientation of the small part and prevent the small part from rotating or shifting. Then, the positioning insert with the small part is inserted into the lower mold. Next, the upper mold assembly and the lower mold assembly are closed, and the molten plastic flows into the molding cavity formed by the molding groove and the positioning groove, so that the product formed after the plastic solidifies wraps part of the small part. Finally, the upper mold assembly and the lower mold assembly are opened, the positioning insert and the product with the small part are taken out, and the positioning insert with the small part is replaced in the lower mold. Thus, by setting multiple positioning inserts, and setting each positioning insert to be movably set on the lower mold part, the positioning inserts can be removed from the lower mold part, which facilitates the positioning of small parts and avoids positioning small parts in complex injection molds, thereby improving injection efficiency. The positioning groove positions the small parts to limit their position, and the limiting member holds the small parts against the groove wall to limit the orientation of the small parts, preventing the small parts from shaking or shifting during injection, thereby improving injection accuracy.
[0009] In some embodiments, the insert includes:
[0010] The insert body is movably inserted into the lower mold part along the mold opening direction and is provided with the positioning groove;
[0011] The stripper body is movably inserted through the insert body along the mold opening direction and is movably connected to the insert body. The stripper body extends into the positioning groove to participate in the formation of the molding cavity and supports the small part located in the positioning groove. The stripper body is used to push the small part when the mold is opened and to strip the small part from the positioning groove.
[0012] In some embodiments, the positioning groove includes a connected receiving hole and a positioning hole, the receiving hole being adjacent to the upper mold assembly relative to the positioning hole, the cross-sectional area of the receiving hole being larger than the cross-sectional area of the positioning hole in the direction perpendicular to the mold opening direction, the positioning hole being configured to abut against the sidewall of the part to position the part, the receiving hole communicating with the molding groove, and the receiving hole being configured to participate in forming the molding cavity to injection mold the product.
[0013] In some embodiments, the positioning groove has a support portion at the bottom of the groove adjacent to one end of the forming groove, the support portion being adapted to the small part and configured to support the small part.
[0014] In some embodiments, the lower mold member is provided with a tapered groove. In the direction perpendicular to the mold opening direction, the cross-sectional area of the tapered groove decreases along the direction from the upper mold assembly to the lower mold assembly. The insert body is adapted to the tapered groove and is movably inserted into the tapered groove along the mold opening direction.
[0015] In some embodiments, the insert further includes:
[0016] A connector is provided on the side of the insert body away from the lower mold and is detachably connected to the insert body. The connector is configured to move the insert body out of the lower mold body.
[0017] In some embodiments, the connector has a connecting portion disposed on the side of the connector facing the upper mold assembly, and the connecting portion is provided with two clamping grooves disposed on the two side walls of the connecting portion in the direction perpendicular to the mold opening direction.
[0018] In some embodiments, the stripping body includes:
[0019] The movable part is movably inserted into the insert body along the mold opening direction and is provided with a through hole;
[0020] A stripping section, protruding from the movable part on the side facing the molded part, extends into the positioning groove. The stripping section is configured to participate in forming the molding cavity and support the small part located in the positioning groove; and
[0021] The limiting part is movably inserted into the insert body and the through hole in sequence along the direction perpendicular to the mold opening direction, and the limiting part is rotatably connected to the insert body.
[0022] In some embodiments, the molded part includes:
[0023] A molded body is disposed on the side of the lower mold component facing the upper mold assembly and abuts against the insert component. The molded body has the molding groove and the connecting groove, and the connecting groove is disposed on the groove wall of the molding groove.
[0024] An ejector body is movably inserted into the lower mold part along the mold opening direction. One end of the ejector body facing the connecting groove is provided with an ejector part. The ejector part is inserted into the connecting groove and extends to the forming groove. The ejector part is configured to push the product out of the forming groove when the mold is opened.
[0025] In some embodiments, the lower mold assembly further includes:
[0026] An ejector pin is movably disposed in the lower mold and the molded part along the mold opening direction. The ejector pin is disposed adjacent to the insert and is configured to push one end of the product adjacent to the small part when the mold is opened. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the structure of the injection mold provided in the embodiments of this application.
[0028] Figure 2 for Figure 1 The diagram shows a three-dimensional structural schematic of the lower mold assembly in the injection mold.
[0029] Figure 3 for Figure 2 The diagram shows a cross-sectional view of the lower mold assembly along the III-III direction.
[0030] Figure 4 for Figure 2 The diagram shows the structural breakdown of the positioning insert.
[0031] Explanation of main component symbols: Injection mold 100, upper mold assembly 101, lower mold assembly 102, lower mold part 10, tapered groove 11, molding part 20, molding groove 21, molding body 22, connecting groove 221, ejector body 23, ejector part 231, positioning insert 30, insert part 31, positioning groove 311, receiving hole 3111, positioning hole 3112, support part 3113, insert body 312, stripper body 313, movable part 3131, through hole 3131a, stripper part 3132, limiting part 3133, connecting body 314, connecting part 3141, clamping groove 3142, limiting part 32, ejector pin part 40. Detailed Implementation
[0032] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0033] In the description of this application, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, it should be noted that "a plurality of" means two or more, unless otherwise explicitly specified.
[0034] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that allows communication between the two components; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0035] The following will describe some embodiments of this application in detail with reference to the accompanying drawings.
[0036] Please see Figure 1 This application provides an injection mold 100, which includes a properly fitted upper mold assembly 101 and a lower mold assembly 102. The injection mold 100 is used to injection mold a product so that the product encloses a small part. For example, the small part can be a metal component, screw, conductive rod, etc.
[0037] Please see Figure 1 and Figure 2 The lower mold assembly 102 includes a lower mold part 10, a molding part 20, and a plurality of positioning inserts 30. The lower mold part 10 and the upper mold assembly 101 are arranged correspondingly along the mold opening direction. The molding part 20 is fixedly arranged on the lower mold part 10, and a molding groove 21 is provided on the side of the molding part 20 facing the upper mold assembly 101. Multiple positioning inserts 30 are alternately arranged in sequence on the lower mold part 10. Each positioning insert 30 can move along the mold opening direction and includes an insert part 31 and a limiting member 32. The insert part 31 is movably inserted into the lower mold part 10 along the mold opening direction. The side of the insert part 31 facing the upper mold assembly 101 is provided with a positioning groove 311. The positioning groove 311 is connected to the molding groove 21 to form the molding cavity of the injection molded product. The positioning groove 311 is used to position small parts. The limiting member 32 is inserted into the positioning groove 311 in a vertical direction perpendicular to the mold opening direction. The limiting member 32 is connected to the insert part 31. The limiting member 32 is used to hold the small part against the groove wall of the positioning groove 311 in a vertical direction perpendicular to the mold opening direction.
[0038] When using the injection mold 100 described above, firstly, the small part is placed in the positioning groove 311 so that the positioning groove 311 positions the small part. The limiting member 32 holds the small part against the groove wall of the positioning groove 311 to limit the position and orientation of the small part and prevent the small part from rotating or shifting. Then, the positioning insert 30 with the small part positioned is inserted into the lower mold part 10. Next, the upper mold assembly 101 and the lower mold assembly 102 close the mold, and the molten plastic flows into the molding cavity formed by the molding groove 21 and the positioning groove 311, so that the product formed after the plastic solidifies wraps part of the small part. Finally, the upper mold assembly 101 and the lower mold assembly 102 open the mold, remove the positioning insert 30 and the product with the small part wrapped in it, and replace the positioning insert 30 with the small part in the lower mold part 10. Thus, by setting multiple positioning inserts 30, and setting each positioning insert 30 to be movably set on the lower mold 10, the positioning inserts 30 can be removed from the lower mold 10, which facilitates the positioning of small parts by the positioning inserts 30, avoids positioning small parts in the complex injection mold 100, and improves injection efficiency; the positioning groove 311 positions the small parts to limit the position of the small parts, and the limiting member 32 holds the small parts against the groove wall of the positioning groove 311 to limit the orientation of the small parts, preventing the small parts from shaking or shifting during injection, and improving injection accuracy.
[0039] Please see Figure 3 and Figure 4 In some embodiments, the insert 31 includes an insert body 312 and a stripper body 313. The insert body 312 is movably inserted into the lower mold part 10 along the mold opening direction and is provided with a positioning groove 311. The stripper body 313 is movably inserted through the insert body 312 along the mold opening direction and is movably connected to the insert body 312. The stripper body 313 extends into the positioning groove 311 to participate in the formation of the molding cavity and supports the small part located in the positioning groove 311. The stripper body 313 is used to push the small part during mold opening and to strip the small part from the positioning groove 311.
[0040] Thus, through the above-mentioned configuration, the stripper 313 can participate in forming the molding cavity of the injection molded product during mold closing, thereby stabilizing the molded product and improving the injection molding stability. During mold opening, it pushes the small parts and products to quickly detach from the positioning groove 311, preventing the small parts and products from adhering to the groove wall of the positioning groove 311, thereby ensuring the quality of the small parts and products.
[0041] Please see Figure 2 and Figure 3In some embodiments, the positioning groove 311 includes a receiving hole 3111 and a positioning hole 3112 that are connected. The receiving hole 3111 is adjacent to the upper mold assembly 101 relative to the positioning hole 3112. In the direction perpendicular to the mold opening direction, the cross-sectional area of the receiving hole 3111 is larger than the cross-sectional area of the positioning hole 3112. The positioning hole 3112 is configured to abut against the sidewall of the small part to position the small part. The receiving hole 3111 is connected to the molding groove 21 and is configured to participate in forming the molding cavity to injection mold the product.
[0042] Thus, through the above-mentioned arrangement, the positioning hole 3112 can be abutted against the side wall of the small part to position the small part and ensure that the small part is stably placed in the insert body 312. At the same time, the small part inserted into the positioning hole 3112 blocks the passage between the positioning hole 3112 and the receiving hole 3111, preventing molten plastic from flowing into other areas of the injection mold 100 through the positioning hole 3112, thereby improving injection molding stability. The receiving hole 3111 can provide sufficient storage space for the small part, so that the molten plastic flowing into the receiving hole 3111 can stably wrap the small part, which is beneficial for the solidified product to stably wrap part of the small part, further improving injection molding stability.
[0043] When the small part is inserted into the positioning hole 3112, the small part abuts against the bottom of the receiving hole 3111, so that the insert body 312 stably supports the small part, preventing the small part from sinking or shaking during the injection molding process, thereby improving the injection molding quality of the product.
[0044] Please see Figure 3 In some embodiments, the positioning groove 311 has a support portion 3113 at the bottom of the groove near one end of the forming groove 21. The support portion 3113 is adapted to the small part and is configured to support the small part.
[0045] Thus, through the above configuration, the support part 3113 can work with the positioning groove 311 to stably support the small part, so that the insert body 312 provides multiple support positions for the small part, ensuring that the small part is subjected to uniform force during the injection molding process, so that the insert body 312 always maintains the preset position and orientation during the injection molding process, thereby improving the quality of the injection molded product.
[0046] Please see Figure 3 In some embodiments, the lower mold 10 is provided with a tapered groove 11. In the direction perpendicular to the mold opening direction, the cross-sectional area of the tapered groove 11 decreases along the direction from the upper mold assembly 101 to the lower mold assembly 102. The insert body 312 is adapted to the tapered groove 11 and is movably inserted into the tapered groove 11 along the mold opening direction.
[0047] Thus, through the above-mentioned configuration, the tapered groove 11 can guide the insert 312 to be quickly and stably inserted into the lower mold 10, reducing the installation difficulty of the insert 31 and the lower mold 10 and improving the installation efficiency of the insert 31. At the same time, by setting the tapered groove 11 to decrease in cross-sectional area, the insertion depth of the insert 312 into the lower mold 10 can be limited, avoiding over-insertion of the insert 312 and effectively preventing the insert 312 from shifting during injection molding, thereby improving the injection molding stability of the injection mold 100.
[0048] Please see Figure 2 and Figure 4 In some embodiments, the insert 31 further includes a connector 314, which is disposed on the side of the insert 312 away from the lower mold 10 and is detachably connected to the insert 312. The connector 314 is configured to move the insert 312 out of the lower mold 10.
[0049] Thus, through the above-mentioned setup, an external robot or operator can directly act on the insert 31 through the connector 314, which facilitates the quick removal of the insert 312 from the lower mold 10 and the easy assembly of the insert 312 onto the lower mold 10, thereby improving the assembly and disassembly efficiency of the insert 31 and thus improving the injection molding efficiency.
[0050] Please see Figure 2 In some embodiments, the connector 314 has a connecting portion 3141, which is disposed on the side of the connector 314 facing the upper mold assembly 101. The connecting portion 3141 is provided with two clamping grooves 3142, which are disposed on the two side walls of the connecting portion 3141 in the vertical direction of the mold opening direction.
[0051] Thus, through the above-mentioned arrangement, the external robot arm can easily clamp the connecting part 3141 through the clamping groove 3142, so as to ensure that the external robot arm can stably clamp and drive the connecting part 3141 to move, thereby stably disassembling and assembling the insert 31 and improving the disassembly and assembly efficiency of the insert 31.
[0052] Please see Figure 3 and Figure 4 In some embodiments, the stripper 313 includes a movable part 3131, a stripper part 3132, and a limiting part 3133. The movable part 3131 is movably inserted through the insert body 312 in the mold opening direction and has a through hole 3131a. The stripper part 3132 protrudes from the movable part 3131 on the side facing the molded part 20, extends into the positioning groove 311, and is configured to participate in forming the molding cavity and support the small part located in the positioning groove 311. The limiting part 3133 is movably inserted through the insert body 312 and the through hole 3131a in a direction perpendicular to the mold opening direction, and is rotatably connected to the insert body 312.
[0053] Thus, through the above arrangement, a movable connection can be formed between the insert body 312 and the stripper body 313. When the mold is opened, the movable part 3131 moves closer to the upper mold assembly 101 under the push of the external lifting member, so that the movable part 3131 drives the stripper body 3132 to push the small part and the product away from the lower mold assembly 102. At the same time, the limiting part 3133 abuts against the hole wall of the through hole 3131a away from the upper mold assembly 101. Then, the external lifting member pushes the movable part 3131 to continue moving closer to the upper mold assembly 101, so that the movable part 3131 drives the insert body 312 to detach from the lower mold assembly 10. This realizes the sequential demolding of the product containing the small part and the insert body 312, avoiding the simultaneous demolding of the product containing the small part and the insert body 312, which would cause damage to the small part and the product, thereby improving the quality of the small part and the product.
[0054] Please see Figure 2 and Figure 3 In some embodiments, the molded part 20 includes a molded body 22 and a pusher body 23. The molded body 22 is disposed on the side of the lower mold part 10 facing the upper mold assembly 101 and abuts against the insert 31. The molded body 22 has a molding groove 21 and a connecting groove 221, with the connecting groove 221 disposed on the groove wall of the molding groove 21. The pusher body 23 is movably inserted through the lower mold part 10 in the mold opening direction. The end of the pusher body 23 facing the connecting groove 221 has a pusher portion 231, which is inserted into the connecting groove 221 and extends into the molding groove 21. The pusher portion 231 is configured to push the product out of the molding groove 21 when the mold is opened.
[0055] Thus, through the above settings, the ejector body 23 can push the product out of the molding groove 21 when the mold is opened, avoiding the product from sticking to the groove wall of the molding groove 21. This allows the product to be demolded synchronously in the molding groove 21 and the positioning groove 311, preventing the product from being damaged due to uneven force during demolding and improving the quality of the product.
[0056] Please see Figure 3 In some embodiments, the lower mold assembly 102 further includes an ejector pin 40, which is movably disposed in the lower mold assembly 10 and the molding part 20 along the mold opening direction. The ejector pin 40 is disposed adjacent to the insert 31 and is configured to push one end of the product adjacent to the small part when the mold is opened.
[0057] Thus, through the above settings, the ejector pin 40 can push the end of the product adjacent to the small part, ensuring that the product is subjected to uniform force during demolding, avoiding deformation or damage to the product due to uneven force during demolding, thereby improving demolding stability.
[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.
Claims
1. An injection mold, comprising a properly fitted upper mold assembly and a lower mold assembly, characterized in that, The lower mold assembly includes: The lower mold component is arranged correspondingly to the upper mold assembly along the mold opening direction; A molded part is fixedly disposed on the lower mold component, and the molded part has a molding groove on the side facing the upper mold assembly; and Multiple positioning inserts are alternately arranged in sequence on the lower mold component. Each positioning insert is movable along the mold opening direction and includes an insert component and a limiting component. The insert component is movably inserted into the lower mold component along the mold opening direction. The side of the insert component facing the upper mold assembly is provided with a positioning groove. The positioning groove is connected to the molding groove to form the molding cavity of the injection molded product. The positioning groove is used to position small parts. The limiting component is inserted into the positioning groove along a vertical direction perpendicular to the mold opening direction. The limiting component is connected to the insert component and is used to abut the small part against the groove wall of the positioning groove along the vertical direction of the mold opening direction.
2. The injection mold as described in claim 1, characterized in that, The insert includes: The insert body is movably inserted into the lower mold part along the mold opening direction and is provided with the positioning groove; The stripper body is movably inserted through the insert body along the mold opening direction and is movably connected to the insert body. The stripper body extends into the positioning groove to participate in the formation of the molding cavity and supports the small part located in the positioning groove. The stripper body is used to push the small part when the mold is opened and to strip the small part from the positioning groove.
3. The injection mold as described in claim 2, characterized in that, The positioning groove includes a connected receiving hole and a positioning hole. The receiving hole is adjacent to the upper mold assembly relative to the positioning hole. In the direction perpendicular to the mold opening direction, the cross-sectional area of the receiving hole is larger than the cross-sectional area of the positioning hole. The positioning hole is configured to abut against the side wall of the small part to position the small part. The receiving hole communicates with the molding groove and is configured to participate in forming the molding cavity to injection mold the product.
4. The injection mold as described in claim 2, characterized in that, The positioning groove has a support portion at the bottom of the groove near one end of the forming groove. The support portion is adapted to the small part and is configured to support the small part.
5. The injection mold as described in claim 2, characterized in that, The lower mold component is provided with a tapered groove. In the direction perpendicular to the mold opening direction, the cross-sectional area of the tapered groove decreases along the direction from the upper mold assembly to the lower mold assembly. The insert body is adapted to the tapered groove and is movably inserted into the tapered groove along the mold opening direction.
6. The injection mold as described in claim 2, characterized in that, The insert also includes: A connector is provided on the side of the insert body away from the lower mold and is detachably connected to the insert body. The connector is configured to move the insert body out of the lower mold body.
7. The injection mold as described in claim 6, characterized in that, The connector has a connecting part, which is located on the side of the connector facing the upper mold assembly. The connecting part has two clamping grooves, which are located on the two side walls of the connecting part in the direction perpendicular to the mold opening direction.
8. The injection mold as described in claim 2, characterized in that, The desizing body includes: The movable part is movably inserted into the insert body along the mold opening direction and is provided with a through hole; A stripping section, protruding from the movable part on the side facing the molded part, extends into the positioning groove. The stripping section is configured to participate in forming the molding cavity and support the small part located in the positioning groove; and The limiting part is movably inserted into the insert body and the through hole in sequence along the direction perpendicular to the mold opening direction, and the limiting part is rotatably connected to the insert body.
9. The injection mold as described in claim 1, characterized in that, The molded part includes: A molded body is disposed on the side of the lower mold component facing the upper mold assembly and abuts against the insert component. The molded body has the molding groove and the connecting groove, and the connecting groove is disposed on the groove wall of the molding groove. An ejector body is movably inserted into the lower mold part along the mold opening direction. One end of the ejector body facing the connecting groove is provided with an ejector part. The ejector part is inserted into the connecting groove and extends to the forming groove. The ejector part is configured to push the product out of the forming groove when the mold is opened.
10. The injection mold as described in claim 1, characterized in that, The lower mold assembly also includes: An ejector pin is movably disposed in the lower mold and the molded part along the mold opening direction. The ejector pin is disposed adjacent to the insert and is configured to push one end of the product adjacent to the small part when the mold is opened.