Injection mold

Abstract

This application provides an injection mold to improve product quality, comprising: an upper mold assembly having an upper mold core, the upper mold core having a first molding groove and a second molding groove, the second molding groove being arranged around the first molding groove; and a lower mold assembly including a lower mold core, a lower mold insert, and a molding part, the lower mold core and the upper mold core being appropriately matched, the lower mold core having a molding end protruding from the lower mold core, the lower mold insert being inserted through the molding end and connected to the lower mold core, the molding part being embedded in the side of the lower mold core facing the upper mold core and having a through hole and a third molding groove, the through hole penetrating the molding part along the mold opening direction, the molding end being inserted through the through hole, the third molding groove being arranged on the side of the molding part facing the upper mold core and corresponding to the second molding groove along the mold opening direction, the second molding groove being arranged around the through hole and communicating with the through hole, the molding part abutting against the upper mold core when the mold is closed, so that the first molding groove, the second molding groove, the third molding groove, the molding end, and the lower mold insert are closed to form the molding cavity of the injection molded product.

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] For plastic products with special structures, such as those consisting of a main body and a connector, where the main body has a receiving groove and the connector is positioned around the receiving groove and connected to one end of the main body adjacent to the opening of the groove, a thermoforming mold is typically used to heat-press the small parts onto the product surface. For example, aluminum foil is heat-pressed onto the connector to seal the receiving groove. However, during the heat-pressing process, the product may collapse due to the high temperature, which not only affects the product's appearance but may also lead to a decrease in the product's sealing performance, thereby reducing product quality. Utility Model Content

[0003] In view of the above situation, it is necessary to provide an injection mold to improve product quality.

[0004] This application provides an injection mold, including:

[0005] The upper mold assembly has an upper mold core, the upper mold core is provided with a first forming groove and a second forming groove, the first forming groove is opened on one side of the upper mold core, and the second forming groove is arranged around the first forming groove and communicates with the first forming groove.

[0006] The lower mold assembly includes a lower mold core, a lower mold insert, and a molding component. The lower mold core is appropriately fitted to the upper mold core. The lower mold core has a molding end on the side facing the first molding groove. The molding end is inserted into the first molding groove when the mold is closed. The lower mold insert passes through the molding end and is connected to the lower mold core. The molding component is embedded in the side of the lower mold core facing the upper mold core and has a through hole and a third molding groove. The through hole passes through the molding component along the mold opening direction, and the molding end passes through the through hole. The third molding groove is located on the side of the molding component facing the upper mold core. One side of the upper mold core is correspondingly arranged with the second molding groove along the mold opening direction. The second molding groove is arranged around the through hole and communicates with the through hole. When the mold is closed, the molded part abuts against the upper mold core so that the first molding groove, the second molding groove, the third molding groove, the molding end and the lower mold insert surround and form the molding cavity of the injection molded product. The first molding groove is used to form the main body of the product, the second molding groove is used to form the connecting body of the product, and the third molding groove is used to form the protrusion of the product. The protrusion is inclined upward relative to the horizontal direction.

[0007] When the above-mentioned injection mold is used, when the injection mold is closed, the lower mold core and the upper mold core move towards each other, the molding end is inserted into the first molding groove, and the molded part abuts against the upper mold core, so that the first molding groove, the second molding groove, the third molding groove, the molding end and the lower mold core form the molding cavity of the injection molded product. The liquid plastic forms the main body of the product in the first molding groove, the connecting body of the product in the second molding groove, and the protrusion of the product in the third molding groove. The protrusion after molding is inclined upward relative to the horizontal direction, so that the protrusion can offset the collapse during the subsequent hot pressing and bonding process of the product, so that the upper surface of the product after hot pressing and bonding is parallel to the horizontal direction, thereby improving the product quality.

[0008] In some embodiments, the upper mold component further includes:

[0009] The injection molded part is located on the side of the upper mold core away from the lower mold core and has an injection runner. The injection runner is connected to the molding cavity and is used to guide liquid plastic into the molding cavity.

[0010] In some embodiments, the upper mold core is provided with a heat-insulating flow channel, which is arranged around the periphery of the injection molded part. The two ends of the heat-insulating flow channel are respectively connected to an external liquid supply component. The heat-insulating flow channel is used to guide liquid at a preset temperature to flow around the injection molded part.

[0011] In some embodiments, the injection molded part is provided with an annular groove, which is disposed on the outer periphery of the injection molded part and surrounds the injection molded part in the circumferential direction, and the annular groove is connected to the heat insulation flow channel.

[0012] In some embodiments, the upper mold component further includes:

[0013] Two seals are respectively disposed on both sides of the annular groove along the mold opening direction. Each seal is sleeved on the injection molded part and embedded in the lower mold core.

[0014] In some embodiments, the cross-sectional area of ​​the injection runner in the direction perpendicular to the mold opening direction decreases in the direction from the upper mold core to the lower mold core.

[0015] In some embodiments, the molded part has an abutment plane on the side facing the upper mold core, the abutment plane is disposed around the second molding groove, and the abutment plane is configured to abut against the upper mold core when the mold is closed.

[0016] In some embodiments, the molding end is provided with a plurality of recessed grooves, all of which are located on the outer side of the molding end and are spaced apart circumferentially along the molding end. The plurality of recessed grooves are configured to receive liquid plastic during mold closing to form a preset structure of the product.

[0017] In some embodiments, both the upper mold core and the lower mold core are provided with cooling channels, which are arranged around the molding cavity. The two ends of the cooling channels are respectively connected to an external liquid supply component, and the cooling channels are used to guide the cooling liquid to flow around the molding cavity.

[0018] In some embodiments, the lower mold assembly further includes:

[0019] Multiple ejector pins are spaced apart along the vertical direction of the mold opening direction and are all movable through the lower mold insert along the mold opening direction. The multiple ejector pins participate in forming the molding cavity when the mold is closed, and extend out of the lower mold insert to push the product away from the lower mold core when the mold is opened. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the injection mold provided in the embodiments of this application.

[0021] Figure 2 To adapt to Figure 1 The diagram shows a three-dimensional structural representation of the product made from the injection mold.

[0022] Figure 3 for Figure 1 The diagram shown is an exploded view of the injection mold structure.

[0023] Figure 4 for Figure 1 The diagram shows a cross-sectional view of the injection mold along the IV-IV direction.

[0024] Figure 5 for Figure 4 The diagram shown is an enlarged view of the injection mold at position V.

[0025] Explanation of main component symbols: Injection mold 100, molding cavity 101, upper mold assembly 10, upper mold core 11, first molding groove 111, second molding groove 112, heat preservation runner 113, cooling runner 114, injection molded part 12, injection runner 121, annular groove 122, sealing element 13, lower mold assembly 20, lower mold core 21, molding end 211, recessed groove 212, lower mold insert 22, molded part 23, through hole 231, third molding groove 232, abutting plane 233, ejector pin 24, product 200, main body 201, receiving groove 2011, connecting body 202, protrusion 203, reinforcing rib 204. Detailed Implementation

[0026] The embodiments of this application are described in detail below, examples of which 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.

[0027] 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.

[0028] 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.

[0029] The following will describe some embodiments of this application in detail with reference to the accompanying drawings.

[0030] Please see Figure 1 and Figure 2 This application provides an injection mold 100, which includes an upper mold assembly 10 and a lower mold assembly 20. The injection mold 100 is used to injection mold a product 200. The product 200 includes a main body 201, a connecting body 202, and a protrusion 203. The main body 201 has a receiving groove 2011. The connecting body 202 is disposed around the receiving groove 2011 and connected to one end of the main body 201 adjacent to the opening of the receiving groove 2011. The protrusion 203 protrudes from the upper surface of the connecting body 202. For example, the product 200 can be a blood glucose meter packaging box.

[0031] Please see Figure 3 , Figure 4 and Figure 5The upper mold assembly 10 has an upper mold core 11, which is provided with a first forming groove 111 and a second forming groove 112. The first forming groove 111 is located on one side of the upper mold core 11, and the second forming groove 112 is arranged around the first forming groove 111 and communicates with it. The lower mold assembly 20 includes a lower mold core 21, a lower mold insert 22, and a molding part 23. The lower mold core 21 is fitted to the upper mold core 11. The side of the lower mold core 21 facing the first forming groove 111 has a forming end 211, which is inserted into the first forming groove 111 when the mold is closed. The lower mold insert 22 passes through the forming end 211 and is connected to the lower mold core 21. The molding part 23 is embedded in the side of the lower mold core 21 facing the upper mold core 11 and is provided with a through hole 231 and a third forming groove 232. The through hole 231 extends along the mold opening direction. The molding part 23 has a molding end 211 that passes through the through hole 231. A third molding groove 232 is located on the side of the molding part 23 facing the upper mold core 11 and is correspondingly arranged with the second molding groove 112 along the mold opening direction. The second molding groove 112 is arranged around the through hole 231 and communicates with the through hole 231. When the mold is closed, the molding part 23 abuts against the upper mold core 11, so that the first molding groove 111, the second molding groove 112, the third molding groove 232, the molding end 211, and the lower mold insert 22 surround and form the molding cavity 101 of the injection molded product 200. The first molding groove 111 is used to form the main body 201 of the product 200, the second molding groove 112 is used to form the connecting body 202 of the product 200, and the third molding groove 232 is used to form the protrusion 203 of the product 200. The protrusion 203 is inclined upward relative to the horizontal direction.

[0032] When the injection mold 100 is used, when the injection mold 100 is closed, the lower mold core 21 and the upper mold core 11 move towards each other, the molding end 211 is inserted into the first molding groove 111, and the molded part 23 abuts against the upper mold core 11, so that the first molding groove 111, the second molding groove 112, the third molding groove 232, the molding end 211 and the lower mold insert 22 form the molding cavity 101 of the injection molded product 200. The liquid plastic forms the main body 201 of the product 200 in the first molding groove 111, the connecting body 202 of the product 200 in the second molding groove 112, and the protrusion 203 of the product 200 in the third molding groove 232. The protrusion 203 after molding is inclined upward relative to the horizontal direction so that the protrusion 203 can offset the collapse during the subsequent hot pressing and bonding process of the product 200, so that the upper surface of the product 200 after hot pressing and bonding is parallel to the horizontal direction, thereby improving the quality of the product 200.

[0033] Please see Figure 4 In some embodiments, the upper mold assembly 10 further includes an injection molding part 12, which is located on the side of the upper mold core 11 away from the lower mold core 21 and has an injection flow channel 121. The injection flow channel 121 is connected to the molding cavity 101 and is used to guide liquid plastic into the molding cavity 101.

[0034] Thus, by setting the injection molded part 12 as described above, the injection flow channel 121 can guide the liquid plastic to flow steadily into the molding cavity 101, reduce the resistance and heat loss of the liquid plastic during the flow process, ensure that the liquid plastic is stably molded in the molding cavity 101, avoid defects such as bubbles and shrinkage during the injection process, and thus improve the molding quality of the product 200.

[0035] Please continue reading. Figure 4 In some embodiments, the upper mold core 11 is provided with a heat-insulating flow channel 113, which is arranged around the periphery of the injection molded part 12. The two ends of the heat-insulating flow channel 113 are respectively connected to an external liquid supply component. The heat-insulating flow channel 113 is used to guide liquid at a preset temperature to flow around the injection molded part 12.

[0036] Thus, by setting the above-mentioned heat-insulating flow channel 113, the preset temperature liquid flowing around the injection molded part 12 can maintain the temperature of the liquid plastic in the injection flow channel 121, reduce the heat loss of the liquid plastic during the flow process, prevent the liquid plastic from solidifying prematurely due to excessive temperature drop, and thus ensure that the liquid plastic maintains ideal fluidity when flowing into the molding cavity 101, further improving the molding quality and product 200 quality.

[0037] Please see Figure 4 In some embodiments, the injection molded part 12 is provided with an annular groove 122, which is located on the outer periphery of the injection molded part 12 and surrounds the injection molded part 12 in the circumferential direction. The annular groove 122 is connected to the heat preservation flow channel 113.

[0038] Thus, by setting the aforementioned annular groove 122, a more reasonable flow path can be provided for the heat-insulating liquid, thereby enhancing the heat-insulating effect.

[0039] In some embodiments, the upper mold assembly 10 further includes two seals 13, which are respectively disposed on both sides of the annular groove 122 along the mold opening direction. Each seal 13 is sleeved on the injection molded part 12 and embedded in the lower mold core 21. Exemplarily, the seal 13 can be a sealing ring.

[0040] Thus, by placing the two seals 13 on both sides of the annular groove 122, the two seals 13 can effectively seal the annular groove 122, prevent the insulation liquid from leaking, avoid the liquid from leaking and causing corrosion and damage to the injection mold 100, thereby improving the sealing performance and service life of the injection mold 100.

[0041] In some embodiments, the cross-sectional area of ​​the injection runner 121 in the direction perpendicular to the mold opening direction decreases in the direction from the upper mold core 11 to the lower mold core 21.

[0042] Thus, by setting the specific structure of the injection runner 121, the flow speed of liquid plastic in the injection runner 121 can be accelerated, the flow time of liquid plastic in the injection runner 121 can be reduced, excessive heat loss of liquid plastic can be avoided, thereby reducing the overall molding time of the injection mold 100 and improving molding efficiency.

[0043] Please see Figure 4 In some embodiments, the molded part 23 has an abutment plane 233 on the side facing the upper mold core 11. The abutment plane 233 is arranged around the second molding groove 112 and is configured to abut against the upper mold core 11 when the mold is closed.

[0044] Thus, by setting the aforementioned abutment plane 233, the molded part 23 can abut against the upper mold core 11 through the abutment plane 233 when the mold is closed, ensuring that the upper mold core 11 and the lower mold core 21 stably seal the molding cavity 101 when the mold is closed, thereby improving the injection molding stability. In addition, it also increases the contact area between the upper mold core 11 and the lower mold core 21, reducing the occurrence of flash and burrs on the product 200 due to loose mold closing of the injection mold 100, thereby improving the molding quality and the quality of the product 200.

[0045] Please see Figure 2 and Figure 3 In some embodiments, the molding end 211 is provided with a plurality of recessed grooves 212, which are all located on the outer side of the molding end 211 and are spaced apart along the circumference of the molding end 211. The plurality of recessed grooves 212 are configured to receive liquid plastic when the mold is closed to form the preset structure of the product 200.

[0046] Thus, by setting the above-mentioned multiple recessed grooves 212, the multiple recessed grooves 212 can receive liquid plastic when the mold is closed, forming the preset structure of the product 200, that is, forming multiple reinforcing ribs 204 on the groove wall of the receiving groove 2011 to improve the structural strength of the product 200.

[0047] Please see Figure 4 In some embodiments, both the upper mold core 11 and the lower mold core 21 are provided with cooling channels 114. The cooling channels 114 are arranged around the molding cavity 101. The two ends of the cooling channels 114 are respectively connected to the external liquid supply component. The cooling channels 114 are used to guide the cooling liquid to flow around the molding cavity 101.

[0048] Thus, by setting up the cooling channel 114, the cooling liquid flowing around the molding cavity 101 can quickly reduce the temperature of the molding cavity 101, shorten the cooling time of the liquid plastic, ensure that the liquid plastic solidifies quickly, and improve molding efficiency.

[0049] Please see Figure 3 and Figure 4In some embodiments, the lower mold assembly 20 further includes a plurality of ejector pins 24, which are spaced apart in the vertical direction of the mold opening direction and are all movably inserted through the lower mold insert 22 in the mold opening direction. The plurality of ejector pins 24 participate in forming the molding cavity 101 when the mold is closed, and extend out of the lower mold insert 22 when the mold is opened to push the product 200 away from the lower mold core 21.

[0050] In this way, by setting multiple ejector pins 24, the ejector pins 24 can participate in forming the molding cavity 101 when the mold is closed, ensuring the molding quality of the product 200. When the mold is opened, the lower mold insert 22 extends out and pushes against different areas of the product 200 to stably push the product 200 away from the lower mold core 21.

[0051] 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 characterized in that, include: The upper mold assembly has an upper mold core, the upper mold core is provided with a first forming groove and a second forming groove, the first forming groove is opened on one side of the upper mold core, and the second forming groove is arranged around the first forming groove and communicates with the first forming groove. The lower mold assembly includes a lower mold core, a lower mold insert, and a molding component. The lower mold core is appropriately fitted to the upper mold core. The lower mold core has a molding end on the side facing the first molding groove. The molding end is inserted into the first molding groove when the mold is closed. The lower mold insert passes through the molding end and is connected to the lower mold core. The molding component is embedded in the side of the lower mold core facing the upper mold core and has a through hole and a third molding groove. The through hole passes through the molding component along the mold opening direction, and the molding end passes through the through hole. The third molding groove is located on the side of the molding component facing the upper mold core. One side of the upper mold core is correspondingly arranged with the second molding groove along the mold opening direction. The second molding groove is arranged around the through hole and communicates with the through hole. When the mold is closed, the molded part abuts against the upper mold core so that the first molding groove, the second molding groove, the third molding groove, the molding end and the lower mold insert surround and form the molding cavity of the injection molded product. The first molding groove is used to form the main body of the product, the second molding groove is used to form the connecting body of the product, and the third molding groove is used to form the protrusion of the product. The protrusion is inclined upward relative to the horizontal direction.

2. The injection mold of claim 1, wherein, The upper mold assembly also includes: The injection molded part is located on the side of the upper mold core away from the lower mold core and has an injection runner. The injection runner is connected to the molding cavity and is used to guide liquid plastic into the molding cavity.

3. The injection mold of claim 2, wherein, The upper mold core is provided with a heat-insulating flow channel, which is arranged around the periphery of the injection molded part. The two ends of the heat-insulating flow channel are respectively connected to an external liquid supply component. The heat-insulating flow channel is used to guide liquid at a preset temperature to flow around the injection molded part.

4. The injection mold of claim 3, wherein The injection molded part is provided with an annular groove, which is located on the outer periphery of the injection molded part and surrounds the circumference of the injection molded part. The annular groove is connected to the heat insulation flow channel.

5. The injection mold as described in claim 4, characterized in that, The upper mold assembly also includes: Two seals are respectively disposed on both sides of the annular groove along the mold opening direction. Each seal is sleeved on the injection molded part and embedded in the lower mold core.

6. The injection mold as described in claim 2, characterized in that, The cross-sectional area of ​​the injection runner in the direction perpendicular to the mold opening direction decreases from the upper mold core to the lower mold core.

7. The injection mold as described in claim 1, characterized in that, The molded part has an abutment plane on the side facing the upper mold core. The abutment plane is arranged around the second molding groove and is configured to abut against the upper mold core when the mold is closed.

8. The injection mold as described in claim 1, characterized in that, The molding end is provided with a plurality of recessed grooves, all of which are located on the outer side of the molding end and are spaced apart along the circumference of the molding end. The plurality of recessed grooves are configured to receive liquid plastic when the mold is closed, so as to form the preset structure of the product.

9. The injection mold as described in claim 1, characterized in that, Both the upper mold core and the lower mold core are provided with cooling channels. The cooling channels are arranged around the molding cavity, and the two ends of the cooling channels are respectively connected to the external liquid supply component. The cooling channels are used to guide the cooling liquid to flow around the molding cavity.

10. The injection mold as described in claim 1, characterized in that, The lower mold assembly also includes: Multiple ejector pins are spaced apart along the vertical direction of the mold opening direction and are all movable through the lower mold insert along the mold opening direction. The multiple ejector pins participate in forming the molding cavity when the mold is closed, and extend out of the lower mold insert to push the product away from the lower mold core when the mold is opened.

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