Nut insert injection molding equipment and forming method

Abstract

The invention relates to the technical field of insert injection molding, in particular to nut insert injection molding equipment and a molding method.The nut insert injection molding equipment comprises an injection molding machine body, an embedding machine body, a temperature regulation and control mechanism and a driving assembly, a mandrel is assembled to an insert, then the insert provided with the mandrel is placed in the embedding machine body, the driving assembly is started, and the temperature regulation and control mechanism is started; the driving assembly drives the temperature regulation and control mechanism to be inserted into the penetrating and inserting groove, the embedding machine body places the insert into the injection molding cavity, the temperature regulation and control mechanism is started to carry out temperature regulation and control on the insert for injection molding, and then after injection molding is completed, the temperature regulation and control mechanism is separated from the penetrating and inserting groove. The method has the effect of reducing generation of cracks.

Description

Technical Field

[0001] This application relates to the technical field of insert injection molding, and in particular to a nut insert injection molding equipment and molding method. Background Technology

[0002] Insert molding is a widely used technique in injection molding, in which pre-made inserts are placed in a mold and molded together with plastic material to form an integrated product. This process is widely used in industries such as automobiles, electronics, and home appliances because it can combine the complementary properties of different materials to create products with better performance.

[0003] Currently, injection molding machines consist of two molds, at least one of which is movable, allowing the two molds to fit together to form an injection cavity. When injection molding a nut insert, a mandrel needs to be inserted into the nut first. The threaded portion of the nut that does not need to be injection molded is matched with the thread of the mandrel. An inserter is used to place the nut insert with the matching thread and mandrel into the injection cavity, followed by injection molding. After injection molding, a cooling mechanism cools the injection material, allowing it to cool and solidify. A temperature sensor in the injection cavity senses the temperature of the injection material during cooling until the cooling temperature reaches a preset value, at which point cooling stops. The two molds are then separated, exposing them to the air for easy demolding. However, a key problem exists during insert injection molding: during plastic cooling, the thermal expansion coefficients between the plastic and the insert do not match, leading to stress concentration, which may cause product cracking or the formation of cracks and gaps between the insert and the plastic. Summary of the Invention

[0004] To reduce the occurrence of cracks, this application provides a nut insert injection molding equipment and molding method.

[0005] On the one hand, the nut insert injection molding equipment provided in this application adopts the following technical solution: A nut insert injection molding machine, comprising: The injection molding machine body includes a first mold, a second mold, and a mandrel. The first mold and the second mold are pressed together to form an injection cavity. The mandrel is detachably assembled to the insert and has a through slot. The inserter body is used to place the insert into the injection cavity; Temperature control mechanism, inserted through slot, used to control the temperature of inserts entering the injection molding process; The drive component, connected to the embedded unit, is used to drive the temperature control mechanism to move.

[0006] By adopting the above technical solution, in the injection molding process of the nut insert, the first mold and the second mold of the injection molding machine body are first pressed together to form an injection cavity. The mandrel is detachably assembled to the insert. Then, the insert body puts the insert with the mandrel assembled into the injection cavity. Then, the drive component drives the temperature control mechanism to insert into the mandrel's through slot. The temperature control mechanism controls the temperature of the insert entering the injection state, which can accurately control the temperature of the insert and reduce the thermal stress caused by the mismatch of thermal expansion coefficients. When the thermal stress is reduced to a certain level, it can effectively reduce the product cracking or crack gaps between the insert and the plastic caused by stress concentration, thereby ensuring the integrity and stability of the product.

[0007] Optionally, the inserter body includes a mounting frame, a material distribution assembly, and an insert assembly. The mounting frame is connected to the injection molding machine body. The material distribution assembly is used to distribute the insert. The material distribution assembly is assembled with the insert assembly. The insert assembly is used to place the insert after being distributed by the material distribution assembly into the injection cavity. The insert assembly is slidably connected to the mounting frame.

[0008] By adopting the above technical solution, the material distribution component processes the inserts and transports them in an orderly manner to the embedding component. The embedding component slides on the mounting frame and can accurately place the material-processed inserts into the injection cavity. This collaborative design of material distribution and embedding improves the accuracy and efficiency of insert placement, enabling the inserts to reach the injection position more accurately and quickly, thereby improving the working efficiency and product quality of the entire nut insert injection molding equipment.

[0009] Optionally, the material distribution assembly includes a discharge pipe, a material distribution component, and a material distribution drive component. The discharge pipe is connected to the embedding assembly, the material distribution component is slidably connected to the discharge component, the material distribution component has a material distribution groove, the material distribution groove is used to receive the insert discharged by the discharge component and transport it to the embedding assembly, and the material distribution drive component is used to drive the material distribution component to slide.

[0010] By adopting the above technical solution, when the material distribution component is working, the discharge pipe discharges the insert, the material distribution component slides under the drive of the material distribution drive component, and the material distribution trough receives the insert discharged by the discharge component and transports it to the embedding component. This working step design makes the material distribution process more orderly, avoids the chaotic transport of inserts, and ensures the continuity of insert transport.

[0011] Optionally, the material distribution component includes a material distribution element and a positioning element. The material distribution element slides with the embedded component. The material distribution element has a positioning groove. The positioning element is inserted into the positioning groove and fits against the groove wall. When the positioning element is located at the end of the positioning groove, the material distribution groove is connected to the output end of the material distribution groove or the embedded component. The positioning element is connected to the embedded component.

[0012] By adopting the above technical solution, the material distribution component slides against the embedded component, enabling the material distribution component to move on the embedded component and providing a basis for subsequent material distribution operations. The material distribution component has a positioning groove, and the positioning component is inserted into the positioning groove and fits against the groove wall. When the positioning component is at the end of the positioning groove, the positioning groove connects to the output end of the material distribution groove or the embedded component. This process can precisely control the conveying path and timing of the insert from the material distribution groove to the output end of the embedded component, so that the insert can be accurately conveyed to the embedded component, improving the accuracy of material distribution and the precision of insert placement. At the same time, the positioning component fits against the groove wall of the positioning groove, which guides the movement of the material distribution component, reduces the possibility of material distribution component deviation, and further improves the accuracy of material distribution and the precision of insert placement.

[0013] Optionally, the material distribution drive component includes a material distribution drive component, an assembly component, and a sliding guide rail. The material distribution drive component is connected to the embedded component, the output end of the material distribution drive component is connected to the assembly component, the assembly component is slidably connected to the sliding guide rail, and the assembly component is assembled with the material distribution component.

[0014] By adopting the above technical solution, the material distribution drive component outputs power, which drives the connected assembly to slide on the sliding guide rail. The assembly is assembled with the material distribution component, thereby driving the material distribution component to perform material distribution action. This enables the material distribution drive component to drive the material distribution component to work stably and accurately, improving the stability and accuracy of the material distribution process, and thus improving the working efficiency and the accuracy of the entire nut insert injection molding equipment.

[0015] Optionally, the embedding unit body is slidably connected to a partition, one end of which is connected to an elastic element, and one end of the elastic element is connected to the embedding unit body. The partition is located at the output end of the embedding unit body and is used to partition the insert.

[0016] By adopting the above technical solution, during the injection molding process of the nut insert, when the insert reaches the output end of the inserting machine body, the partition can block it. Since one end of the partition is connected to the elastic element connected to the inserting machine body, the drive component drives the temperature control mechanism to insert into the slot. When the thrust of the insert is greater than the elastic force of the elastic element, the partition will slide, and the insert can pass through. After the insert passes through, the elastic element will reset the partition, ensuring the stability and accuracy of the insert placement process, thereby improving the quality and efficiency of nut insert injection molding.

[0017] Optionally, the partition has an outlet groove, the size of which is smaller than the cross-sectional area of ​​the insert but larger than the cross-sectional area of ​​the temperature control mechanism.

[0018] By adopting the above technical solution, during the injection molding process of the nut insert, the size of the outlet groove of the partition is smaller than the cross-sectional area of ​​the insert. The partition can effectively block the insert, preventing it from falling off at will, and making it easier to insert the temperature control mechanism into the through slot. The size of the outlet groove is larger than the cross-sectional area of ​​the temperature control mechanism, which ensures that the temperature control mechanism can pass smoothly through the outlet groove, reducing the damage of the partition to the temperature control machine and not affecting the normal operation of the temperature control mechanism, thereby improving the working efficiency and injection quality of the entire nut insert injection molding equipment.

[0019] Optionally, the material distribution component includes an extension, which is located outside the embedded component. The output end of the material distribution drive component is connected to the extension, and the extension is connected to the material distribution component.

[0020] By adopting the above technical solution, the output end of the material distribution drive component is connected to the extension located outside the embedded component, and the extension is connected to the material distribution component. When the material distribution drive component is working, its output end generates driving force, which is transmitted to the material distribution component through the extension, allowing the material distribution component to slide on the discharge component. This makes the installation position of the material distribution drive component more flexible, reducing the space limitations and interference problems that may be caused by installation inside the embedded component. Moreover, since the extension is located outside the embedded component, it is convenient to maintain and repair the material distribution drive component, and it is also convenient to adjust and replace the material distribution component. In addition, by transmitting driving force through the extension, the material distribution component can be driven to slide more stably, improving the accuracy and efficiency of material distribution, thereby ensuring that the insert can be accurately and efficiently delivered to the embedded component, providing a reliable guarantee for the subsequent injection molding process.

[0021] Optionally, the temperature control mechanism includes a insert, a temperature adjustment component, and a temperature sensor. The insert is inserted into the insert slot, the temperature adjustment component is mounted on the insert and is used to regulate the temperature of the insert, the temperature sensor is mounted on the insert and is used to sense the temperature inside the mandrel, and the drive component is used to drive the insert to move.

[0022] By adopting the above technical solution, the drive component drives the insert to be inserted into the slot, the temperature sensor can sense the temperature inside the mandrel in real time and feed back the temperature information, and the temperature regulation component can accurately regulate the temperature of the insert based on the feedback information, thereby effectively alleviating the problem of mismatch between the thermal expansion coefficients of plastic and insert, and reducing the product cracking or crack gaps between insert and plastic caused by temperature differences.

[0023] On the other hand, the nut insert injection molding method provided in this application, which uses the above-mentioned nut insert injection molding equipment, includes the following technical solution: A method for injection molding a nut insert, using a nut insert injection molding machine, includes the following steps: S1: Assemble the mandrel into the insert, and then place the insert with the mandrel into the inserter body; S2: Start the drive component, which drives the temperature control mechanism to insert into the slot; S3: The inserter body places the insert into the injection cavity; S4: Activate the temperature control mechanism to regulate the temperature of the insert; S5: Injection molding is performed; S6: Injection molding complete, temperature control mechanism disengages from the slot.

[0024] By adopting the above technical solution, in the injection molding method of the nut insert, the mandrel is first assembled onto the insert and placed in the inserting machine body to prepare for the subsequent placement of the insert into the injection cavity. The drive assembly is activated to insert the temperature control mechanism into the slot, which facilitates the temperature control of the insert during the injection process. The inserting machine body places the insert into the injection cavity, and the temperature control mechanism is activated to control the temperature of the insert, which can accurately control the temperature of the insert before injection molding. This effectively alleviates the problem of mismatch between the thermal expansion coefficients of the plastic and the insert. After injection molding is completed, the temperature control mechanism disengages from the slot, ensuring the smooth progress of the entire injection molding process. Overall, this improves the accuracy and efficiency of insert placement and reduces the problem of product cracking or gaps caused by the mismatch between the thermal expansion coefficients of the plastic and the insert during the insert injection molding process.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. In the injection molding process of the nut insert, the first mold and the second mold of the injection molding machine body are pressed together to form an injection cavity. The mandrel is detachably assembled to the insert. Then, the insert body puts the insert with the mandrel assembled into the injection cavity. Then, the drive component drives the temperature control mechanism to insert into the mandrel's through slot. The temperature control mechanism controls the temperature of the insert entering the injection state, which can accurately control the temperature of the insert and reduce the thermal stress caused by the mismatch of thermal expansion coefficients. When the thermal stress is reduced to a certain level, it can effectively reduce the product cracking or crack gaps between the insert and the plastic caused by stress concentration, thereby ensuring the integrity and stability of the product. 2. The material distribution component processes the inserts, the drive component drives the insertion plug to be inserted into the slot, the temperature sensor can sense the temperature inside the mandrel in real time and feed back the temperature information, the temperature regulation component precisely regulates the temperature of the insert based on the feedback information, thereby effectively alleviating the problem of mismatch between the thermal expansion coefficients of plastic and insert, reducing the product cracking or crack gaps between insert and plastic caused by temperature differences. 3. In this nut insert injection molding method, the mandrel is first assembled onto the insert and placed in the insert molding machine body to prepare for the subsequent placement of the insert into the injection cavity. The drive assembly is activated to insert the temperature control mechanism into the slot, facilitating temperature control of the insert during the injection molding process. The insert molding machine body places the insert into the injection cavity, and the temperature control mechanism is activated to regulate the insert temperature, enabling precise temperature control before injection molding. This effectively alleviates the problem of mismatch between the thermal expansion coefficients of the plastic and the insert. After injection molding, the temperature control mechanism disengages from the slot, ensuring the smooth progress of the entire injection molding process. Overall, this improves the accuracy and efficiency of insert placement and reduces product cracking or gap problems caused by mismatch between the thermal expansion coefficients of the plastic and the insert during the insert injection molding process. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application.

[0027] Figure 2 This is a half-sectional schematic diagram of the embedded component in an embodiment of this application.

[0028] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0029] Figure 4 This is a schematic diagram of the interior of the mounting bracket in an embodiment of this application.

[0030] Figure 5 This is an exploded view of the embedded components in an embodiment of this application.

[0031] Figure 6 yes Figure 5 Enlarged view of section B in the middle.

[0032] Explanation of reference numerals in the attached figures: 1. Embedding machine body; 11. Mounting bracket; 12. Sliding drive component; 13. Moving guide rail; 131. Moving seat; 14. Pull rod; 15. First plate; 151. Connecting rod; 152. Second plate; 153. Third plate; 154. Fourth plate; 1541. Mounting slot; 155. Embedding tube; 16. Discharge pipe; 17. Material distribution component; 171. Material distribution groove; 172. Positioning component; 173. Extension component; 174. Positioning groove; 18. Material distribution drive component; 19. Assembly component; 191. Sliding guide rail; 2. Temperature control mechanism; 21. Insert plug; 211. Temperature control chamber; 22. Temperature sensor; 23. Heating component; 24. Cold air inlet pipe; 3. Drive assembly; 4. First mold; 41. Second mold; 42. Mandrel; 5. Partition; 51. Elastic component; 52. Outlet groove; 53. Guide slope. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-6This application will be described in further detail.

[0034] On the one hand, this application discloses a nut insert injection molding equipment.

[0035] Reference Figures 1 to 3 A nut insert injection molding equipment includes an injection molding machine body, an insert body 1, a temperature control mechanism 2, and a drive assembly 3. The injection molding machine body includes a frame, a first mold 4, a second mold 41, and a mandrel 42. At least one of the first mold 4 and the second mold 41 is slidably connected to the frame. The first mold 4 is located on top of the second mold 41. In a preferred embodiment, the first mold 4 is fixed to the frame, and the second mold 41 is slidably connected to the frame. The second mold 41 can be hydraulically pressed together with or separated from the first mold 4 to form an injection cavity. The mandrel 42 is detachably assembled. In a preferred embodiment, the insert is a nut, and the mandrel 42 is threaded onto the nut. Furthermore, a through slot is provided on one end of the mandrel 42. The inserting machine body 1 is used to place the insert into the injection cavity. The temperature control mechanism 2 is inserted into the through slot and is used to control the temperature of the insert entering the injection molding state. The drive assembly 3 is connected to the inserting machine body 1 and is used to drive the temperature control mechanism 2 to move. By controlling the temperature of the insert through the temperature control mechanism 2, the problem of mismatch between the thermal expansion coefficients of the plastic and the insert is alleviated, the thermal stress concentration is reduced, and the possibility of product cracking or the formation of crack gaps is reduced.

[0036] The embedding machine body 1 is located at the top of the injection cavity, as shown in the reference. Figure 1 and Figure 4 The embedding machine body 1 includes a mounting frame 11, a material distribution component, and an embedding component. The mounting frame 11 is usually welded or assembled from metal profiles and has sufficient strength and stability. It is connected to the machine frame by bolts or welding. The material distribution component is used to process the inserts. The embedding component is used to place the inserts processed by the material distribution component into the injection cavity. The embedding component is slidably connected to the mounting frame 11. Specifically, the mounting frame 11 is fixedly connected to a sliding drive component 12. The output end of the sliding drive component 12 is connected to the embedding component. In a preferred embodiment, the sliding drive component 12 is a cylinder.

[0037] Furthermore, the mounting bracket 11 is fixedly connected to a movable guide rail 13, the movable guide rail 13 is slidably connected to a movable seat 131, the movable seat 131 is fixedly connected to a pull rod 14, and the pull rod 14 is fixedly connected to the embedded component.

[0038] Reference Figure 4 and Figure 5The embedded component includes a first plate 15, a connecting rod 151, a second plate 152, a third plate 153, a fourth plate 154, and an embedded tube 155. The first plate 15 is slidably connected to the mounting bracket 11. The second plate 152 is fixedly connected to the connecting rod 151. The end of the connecting rod 151 away from the second plate 152 is fixedly connected to the third plate 153. The third plate 153 is detachably connected to the second plate 152. The fourth plate 154 is detachably connected to the third plate 153. The second plate 152, the third plate 153, and the fourth plate 154 are sequentially attached. The pull rod 14 is fixedly connected to the top wall of the third plate 153. The embedded tube 155 is fixedly connected to the fourth plate 154 and is vertically arranged.

[0039] The material distribution assembly includes a discharge pipe 16, a material distribution component, and a material distribution drive component. The discharge pipe 16 is generally made of metal or plastic pipe and is fixedly connected to the third plate 153. The material distribution component is slidably connected to the discharge component and has a material distribution groove 171. The groove size of the material distribution groove 171 is adapted to the insert. The material distribution groove 171 is connected to the pipe of the embedded pipe 155 or the pipe of the discharge pipe 16. The material distribution groove 171 is used to receive the insert discharged by the discharge component and transport it to the embedded pipe 155. The material distribution drive component is used to drive the material distribution component to slide.

[0040] Furthermore, the material distribution component includes a material distribution element 17, a positioning element 172, and an extension element 173. The material distribution element 17 has a plate-like structure and slides against the fourth plate 154. The fourth plate 154 has a mounting groove 1541 on the side near the third plate 153, and the material distribution element 17 is located in the mounting groove 1541. A positioning groove 174 is formed through the material distribution element 17 on the side near the third plate 153. The positioning groove 174 is elongated and its length is parallel to the sliding direction of the material distribution element 17. The positioning element 172 is inserted into the positioning groove 174 and fits against the groove wall of the positioning groove 174. The positioning element 172 is generally a columnar structure. When the positioning element 172 is located at the end of the positioning groove 174... At this time, the material distribution groove 171 is connected to the pipe of the discharge pipe 16 or the pipe of the embedded pipe 155. Specifically, when the positioning member 172 is located at the end of the positioning groove 174 near the discharge pipe 16, the material distribution groove 171 is connected to the pipe of the discharge pipe 16. When the positioning member 172 is located at the end of the positioning groove 174 away from the discharge pipe 16, the material distribution groove 171 is connected to the embedded pipe 155. The accurate delivery of the insert is achieved by sliding the material distribution member 17. The extension member 173 is located outside the fourth plate 154. The output end of the material distribution drive component is fixedly connected to the extension member 173. The extension member 173 is fixedly connected to the material distribution member 17. In a preferred embodiment, the extension member 173 and the material distribution member 17 are fixedly connected by bolts.

[0041] The material dispensing drive component includes a material dispensing drive component 18, an assembly component 19, and a sliding guide rail 191. The material dispensing drive component 18 is fixedly connected to the first plate 15. The output end of the material dispensing drive component 18 is fixedly connected to the assembly component 19. The assembly component 19 is slidably connected to the sliding guide rail 191. The sliding guide rail 191 is fixedly connected to the first plate 15. The assembly component 19 is fixedly connected to the extension component 173. In a preferred embodiment, the assembly component 19 and the extension component 173 are fixedly connected by bolts. In a preferred embodiment, the material dispensing drive component 18 is a cylinder.

[0042] During the material distribution process, inserts are installed into the discharge pipe 16, and the inserts are stacked sequentially in the discharge pipe 16. The material distribution drive 18 is activated, which drives the assembly 19 to slide along the sliding guide rail 191. The movement of the assembly 19 causes the extension 173 to move, which in turn causes the material distribution component 17 to move. The positioning rod guides the movement of the material distribution component 17 until it fits against the side wall of the positioning groove 174 near the end of the discharge pipe 16. At this point, the discharge pipe 16 is connected to the material distribution groove 171, and an insert enters the material distribution groove 171. The material distribution drive 18 is activated again, and the material distribution drive 18 drives the material distribution component 17 to move away from the discharge pipe 16 through the assembly 19 until the material distribution component 17 fits against the side wall of the positioning groove 174 away from the discharge pipe 16. At this point, the material distribution groove 171 is connected to the embedding pipe 155, thereby realizing the material distribution process of the inserts.

[0043] Reference Figure 2 and Figure 3 The temperature control mechanism 2 includes a insert 21, a temperature adjustment component, and a temperature sensor 22. The insert 21 has a rod-shaped structure. The drive component 3 is used to drive the insert 21 to move. The drive component 3 is fixedly connected to the second plate 152. The output end of the drive component 3 is fixedly connected to the insert 21. The insert 21 can be inserted into the slot of the mandrel 42 by the drive component 3. The insert 21 has a temperature control cavity 211. The temperature adjustment component is assembled on the insert 21 and is used to regulate the temperature of the insert. The temperature sensor 22 is fixedly connected to the cavity wall of the temperature control cavity 211 and is used to sense the temperature inside the mandrel 42. It can sense the temperature inside the mandrel 42 in real time and feed the temperature signal back to the control system of the equipment. The control system adjusts the working state of the temperature adjustment component according to the feedback signal. In a preferred embodiment, the drive component 3 is a cylinder.

[0044] Specifically, the temperature control assembly includes a heating element 23, a cold air inlet pipe 24, and a hot air outlet pipe. The heating element 23 is installed inside the temperature control cavity 211 and is spirally coiled and fixed to the inner wall of the hot air cavity. In a preferred embodiment, the heating element 23 is a heating wire. One end of the cold air inlet pipe 24 is fixedly connected to the insert 21, and the end of the cold air inlet pipe 24 away from the cold air insert 21 is connected to the cold air output end of an external refrigeration device. The cold air inlet pipe 24 is connected to the hot air pipe and is used to transport the cold air generated by the external refrigeration device to the heating cavity to regulate the temperature in the heating cavity. Cooling treatment is performed, and the insert is cooled by heat conduction. Furthermore, the cold air inlet pipe 24 is equipped with an electrically controlled inlet valve, which is used to control the start and stop, flow and speed of the cold air delivered by the cold air inlet pipe. The hot air outlet pipe is connected to the hot air chamber and is fixedly connected to the insert 21. The hot air outlet pipe and the cold air inlet pipe 24 are radially distributed along the mandrel 42. The hot air outlet pipe is equipped with an electrically controlled outlet valve, which is used to control the flow and speed of the gas in the heating chamber, so that the gas is discharged from the deheating chamber. In a preferred embodiment, the external cooling device adopts a miniature refrigerator.

[0045] When the insert 21 is inserted into the slot, the drive assembly 3 drives the insert 21 to move, thereby inserting the insert into the injection cavity. The heating element 23 is activated to heat the cavity, filling the hot air chamber. Heat is transferred to the insert via heat conduction through the insert 21 and mandrel 42, thus heating the insert and raising its temperature. The temperature sensor 22 senses the temperature in the heating chamber. When the temperature in the heating chamber reaches a preset value, heating stops, and the injection molding process begins. After injection molding is complete, the cooling mechanism is activated to cool the injection molding material. When the temperature difference between the temperature sensed by the temperature sensor installed inside the cavity and the temperature sensed by the temperature sensor 22 is between 0°C and 10°C, the electronically controlled air inlet valve is activated, and the cold air inlet pipe 24 delivers cold air to the hot air cavity. Subsequently, the heat in the hot air cavity is cooled down. At the same time, the electronically controlled air outlet valve is activated, which allows the gas in the heating cavity to be discharged from the hot air outlet pipe. This prolongs the cooling time of the insert, reduces the temperature difference between the insert and the injection molding material, reduces thermal stress concentration, and reduces the possibility of product cracking or gap cracks caused by the mismatch of the thermal expansion coefficients of the plastic and the insert.

[0046] Furthermore, the inlet end of the hot air outlet pipe is located at the top of the hot air cavity, and the cold air inlet pipe 24 is inserted into the hot air cavity. The part of the cold air inlet pipe 24 inserted into the hot air cavity is vertically arranged, and the outlet end of the cold air inlet pipe 24 is located at the bottom of the hot air cavity. This allows the cold air delivered by the cold air inlet pipe 24 to flow from the bottom to the top of the hot air cavity, and then be discharged through the hot air outlet pipe. When the air heat rises, the kinetic energy of the air molecules increases, the distance between molecules increases, and the density decreases. The less dense hot air will be affected by the buoyancy of the surrounding denser cold air and move upward, thereby discharging the hot air in the hot air cavity through the hot air outlet pipe set at the top, thus improving the cooling efficiency.

[0047] Reference Figure 3 and Figure 6 The embedded tube 155 is slidably connected to a partition 5. One end of the partition 5 is fixedly connected to an elastic element 51. One end of the elastic element 51 is fixedly connected to the fourth plate 154. The partition 5 is located at the end of the embedded tube 155 near the fourth plate 154 and is symmetrically arranged. The partition 5 is used to block the insert. In a preferred embodiment, the elastic element 51 is a spring.

[0048] During the injection molding process of the nut insert, when the insert reaches the end of the insertion tube 155 near the fourth plate 154, the partition 5 can block it. The drive assembly 3 drives the through insert 21 to fit into the through slot. When the thrust of the insert is greater than the elastic force of the elastic member 51, the partition 5 will slide, allowing the insert to pass through. This facilitates the insertion of the through insert 21 into the through slot, ensuring the stability and accuracy of the insert placement process, thereby improving the quality and efficiency of the nut insert injection molding.

[0049] The partition 5 has an outlet groove 52, and the opening end of the outlet groove 52 has a guide slope 53, which facilitates the movement of the partition 5. The size of the outlet groove 52 is smaller than the cross-sectional area of ​​the insert and larger than the cross-sectional area of ​​the through-hole 21. The partition 5 can effectively block the insert and prevent it from falling off at will, making it easy to insert the through-hole 21 into the through-hole. The size of the outlet groove 52 is larger than the cross-sectional area of ​​the through-hole 21, which can also ensure that the through-hole 21 can pass through the outlet groove 52 smoothly, reducing the damage of the partition 5 to the through-hole 21 and not affecting the normal operation of the through-hole 21, thereby improving the working efficiency and injection quality of the entire nut insert injection molding equipment.

[0050] The implementation principle of the nut insert injection molding equipment in this embodiment is as follows: During injection molding, the mandrel 42 is first assembled onto the insert, and then the insert with the mandrel 42 is placed into the discharge pipe 16. The material distribution drive 18 drives the material distribution plate to move, so that the material distribution groove 171 is connected to the pipe of the discharge pipe 16. The insert enters the material distribution groove 171. The material distribution drive 18 is started, and the material distribution drive 18 drives the material distribution component 17 to move, so that the material distribution groove 171 is connected to the pipe of the embedding pipe 155. At this time, the insert is located at the partition 5. The drive assembly 3 is started, and the drive assembly 3 drives the through-insert 21 to be inserted into the through-slot. The drive insert 21 continues to move, and under the guidance of the guide slope 53, the partition 5 slides onto the fourth plate 154. The insert 21 drives the insert into the injection cavity, realizing the installation of the insert. The temperature regulation component is activated, and the temperature regulation component heats up and transfers heat to the insert through heat transfer. The injection operation is started, and the injection molding material enters the injection cavity and comes into contact with the insert. This reduces the temperature difference between the insert and the injection molding material, reduces thermal stress concentration, and reduces the possibility of product cracking or gap problems caused by the mismatch of the thermal expansion coefficients of the plastic and the insert. This has a significant improvement and contribution to the existing insert injection molding technology.

[0051] On the other hand, this application discloses a method for injection molding a nut insert, which uses the aforementioned nut insert injection molding equipment and includes the following steps: S1: Assemble the mandrel 42 onto the insert, and then place the insert with the mandrel 42 into the inserting machine body 1. Specifically, the material distribution component 17 is driven by the material distribution drive component 18 to transport the insert in the discharge pipe 16 to the pipe opening of the inserting pipe 155 near the fourth plate 154, and the insert is located on the side of the partition component 5 near the material distribution plate.

[0052] S2: Start the drive component 3. The drive component 3 drives the temperature control mechanism 2 to insert into the slot. Specifically, the drive component 3 causes the insertion plug 21 to be inserted into the slot.

[0053] S3: The inserter body 1 places the insert into the injection cavity. Specifically, the drive assembly 3 is continuously started, and the drive assembly 3 drives the through-plug 21 to push the partition 5, causing the partition 5 to slide, the outlet groove 52 to open, the through-plug 21 to drive the insert into the injection cavity, and the insert tube 155 guides the movement of the insert, so that the insert is placed into the injection cavity.

[0054] S4: Activate temperature control mechanism 2 to regulate the temperature of the insert. Based on the insert temperature feedback from temperature sensor 22, temperature control mechanism 2 heats or cools the insert through temperature adjustment components to maintain the insert temperature within a suitable range and reduce thermal stress concentration.

[0055] S5: Injection molding is performed. Specifically, the injection molding material comes into contact with the heated insert.

[0056] S6: Injection molding is complete, and the temperature control mechanism 2 disengages from the slot. After injection molding is complete, the drive assembly 3 drives the through-plug 21 to be pulled out of the slot, and then the first mold 4 and the second mold 41 are opened to remove the injection-molded product.

[0057] The implementation principle of the nut insert injection molding method in this embodiment is as follows: This molding method achieves efficient and precise molding of the insert through reasonable step arrangement and the coordinated work of various components of the nut insert injection molding equipment. In particular, the temperature control step can effectively solve the problem of mismatch between the thermal expansion coefficients of plastic and insert, improve the quality and stability of the product, and has obvious improvements and advantages compared with the existing molding methods.

[0058] The above are all preferred embodiments of this application. These embodiments are only explanations of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A nut insert injection molding equipment, characterized in that, include: The injection molding machine body includes a first mold (4), a second mold (41) and a mandrel (42). The first mold (4) and the second mold (41) are pressed together to form an injection cavity. The mandrel (42) is detachably assembled to the insert. The mandrel (42) has a through slot. The inserter body (1) is used to place the insert into the injection cavity; Temperature control mechanism (2) is inserted into the slot to control the temperature of the insert entering the injection molding state; The drive component (3) is connected to the embedded machine body (1) and is used to drive the temperature control mechanism (2) to move.

2. The nut insert injection molding equipment according to claim 1, characterized in that, The inserter body (1) includes a mounting frame (11), a material distribution component and an insert component. The mounting frame (11) is connected to the injection molding machine body. The material distribution component is used to process the insert. The material distribution component is assembled with the insert component. The insert component is used to put the insert processed by the material distribution component into the injection cavity. The insert component is slidably connected to the mounting frame (11).

3. The nut insert injection molding equipment according to claim 1, characterized in that, The material distribution assembly includes a discharge pipe (16), a material distribution component, and a material distribution drive component. The discharge pipe (16) is connected to the embedding assembly. The material distribution component is slidably connected to the discharge component. The material distribution component has a material distribution groove (171). The material distribution groove (171) is used to receive the inserts discharged by the discharge component and transport them to the embedding assembly. The material distribution drive component is used to drive the material distribution component to slide.

4. The nut insert injection molding equipment according to claim 1, characterized in that, The material distribution component includes a material distribution element (17) and a positioning element (172). The material distribution element (17) slides with the embedded component. The material distribution element (17) has a positioning groove (174). The positioning element (172) is inserted into the positioning groove (174). The positioning element (172) fits against the groove wall of the positioning groove (174). When the positioning element (172) is located at the end of the positioning groove (174), the material distribution groove (171) is connected to the output end of the material distribution groove (171) or the embedded component. The positioning element (172) is connected to the embedded component.

5. The nut insert injection molding equipment according to claim 1, characterized in that, The material distribution drive component includes a material distribution drive component (18), an assembly component (19), and a sliding guide rail (191). The material distribution drive component (18) is connected to the embedded component. The output end of the material distribution drive component (18) is connected to the assembly component (19). The assembly component (19) is slidably connected to the sliding guide rail (191). The assembly component (19) is assembled with the material distribution component.

6. The nut insert injection molding equipment according to claim 1, characterized in that, The embedding body (1) is slidably connected to a partition (5), one end of which is connected to an elastic element (51), and one end of the elastic element (51) is connected to the embedding body (1). The partition (5) is located at the output end of the embedding body (1) and is used to partition the insert.

7. The nut insert injection molding equipment according to claim 1, characterized in that, The partition (5) has an outlet groove (52). The size of the outlet groove (52) is smaller than the cross-sectional area of ​​the insert and larger than the cross-sectional area of ​​the temperature control mechanism (2).

8. The nut insert injection molding equipment according to claim 1, characterized in that, The material distribution component includes an extension (173), which is located outside the embedded component. The output end of the material distribution drive component is connected to the extension (173), and the extension (173) is connected to the material distribution component (17).

9. A nut insert injection molding equipment according to claim 1, characterized in that, The temperature control mechanism (2) includes a insert (21), a temperature adjustment component and a temperature sensor (22). The insert (21) is inserted into the insert slot. The temperature adjustment component is mounted on the insert (21) and is used to control the temperature of the insert. The temperature sensor (22) is mounted on the insert (21) and is used to sense the temperature inside the spindle (42). The drive component (3) is used to drive the insert (21) to move.

10. A method for injection molding a nut insert, using the nut insert injection molding equipment described in any one of claims 1-9, characterized in that, Includes the following steps: S1: Assemble the mandrel (42) into the insert, and then place the insert with the mandrel (42) into the insert body (1); S2: Start the drive component (3), and the drive component (3) drives the temperature control mechanism (2) to insert into the slot; S3: The inserter body (1) places the insert into the injection cavity; S4: Start the temperature control mechanism (2) to control the temperature of the insert; S5: Injection molding is performed; S6: Injection molding is complete, and the temperature control mechanism (2) disengages from the slot.

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