Cooling circulation structure of plastic watchband injection mold

Abstract

The utility model belongs to injection mold technical field, concretely is a kind of cooling circulation structure of plastic watchband injection mold, including upper die holder and lower die holder, the upper die holder is set in the top side of lower die holder, the bottom side of upper die holder is fixedly installed with upper mould, the top side of lower die holder is fixedly installed with lower mould, the side of upper mould and lower mould mutually close is all set with injection moulding groove, the utility model is connected with each other by setting communication subassembly, utilizes the cooperation of conical block and conical mouth, the elastic reset action of spring and the auxiliary sealing of sealing washer, the reliable intercommunication of flow channel when clamping and the quick sealing when opening mould are realized, the sealing property of traditional connecting structure is improved, circulation cooling component passes through the flow direction switching of two groups of three-way valves, cooperates a group of circulating pump to complete the circulating delivery of cooling liquid and the complete suction of residual cooling liquid in mould.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to a cooling circulation structure for a plastic watch strap injection mold. Background Technology

[0002] In the injection molding production of plastic watch straps, the mold's cooling system is crucial to product molding quality and production efficiency. Plastic watch straps typically have a complex structure with long, thin, and multi-segmented sections. After injection molding, they need to be cooled quickly and evenly by a cooling system to avoid defects such as shrinkage marks and deformation, and to shorten the molding cycle.

[0003] In existing technologies, the cooling channels of the upper and lower molds usually need to be connected during mold closing to achieve coolant circulation. After the circulation cooling is completed, the coolant in the mold channel is difficult to be quickly and completely drawn back to the water tank. When the mold is opened, the residual coolant is prone to leakage from the channel interface. Moreover, the connection between the upper and lower mold channels often adopts a simple butt joint structure with poor sealing performance, and external impurities are prone to enter the channel and cause blockage. Therefore, we propose a cooling circulation structure for plastic watch strap injection molds. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a cooling circulation structure for a plastic watch strap injection mold. By setting up a connecting component, utilizing the cooperation between the conical block and the conical opening, the elastic restoring effect of the spring, and the auxiliary sealing of the sealing gasket, reliable connection of the flow channel is achieved during mold closing and rapid sealing during mold opening. The circulating cooling component, through the switching of the flow direction of two sets of three-way valves, combined with a circulating pump, can complete the circulation and delivery of coolant and the complete removal of residual coolant from the mold, thus solving the problems mentioned earlier.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cooling circulation structure for a plastic watch strap injection mold, comprising an upper mold base and a lower mold base. The upper mold base is disposed on the top side of the lower mold base, and an upper mold is fixedly installed on the bottom side of the upper mold base. A lower mold is fixedly installed on the top side of the lower mold base. Injection molding grooves are provided on the sides of the upper and lower molds that are close to each other. An injection port is provided on the top side of the injection molding groove. Cooling channels two and one are respectively provided inside the upper and lower molds. The lower mold has a right-side cooling channel... The upper and lower molds are provided with liquid outlet channels on the sides, and two sets of threaded grooves are provided on the sides of the upper and lower molds that are close to each other. The two sets of threaded grooves on the top side are connected to the input end and output end of the second cooling channel, respectively. The two sets of threaded grooves on the bottom side are connected to the output end of the first cooling channel and the input end of the liquid outlet channel, respectively. The output end of the first cooling channel is directly opposite the input end of the second cooling channel, and the input end of the liquid outlet channel is directly opposite the output end of the second cooling channel. Connecting components are provided on the four sets of threaded grooves. A circulating cooling component is provided on the right side of the lower mold.

[0006] Preferably, the connecting component includes a connecting pipe threaded into a threaded groove. One end of the connecting pipe extending out of the threaded groove has a tapered opening, and the other end of the connecting pipe has a connecting port. A cross-shaped fixing plate is fixedly connected to the inner wall of the connecting pipe. A sliding rod is slidably mounted on the cross-shaped fixing plate. A tapered block is fixedly connected to one end of the sliding rod near the tapered opening. The outer surface of the tapered block abuts against the inner surface of the tapered opening. A spring is sleeved on the sliding rod. The two sides of the spring abut against the tapered block and the cross-shaped fixing plate, respectively. A top rod is fixedly connected to the end of the tapered block away from the sliding rod.

[0007] Preferably, the circulating cooling assembly includes a coolant tank located on the right side of the lower mold. Semiconductor cooling plates are installed on both the front and rear sides of the coolant tank. A circulating pump is installed between the lower mold and the coolant tank. A liquid outlet valve is fixedly connected to the bottom left side of the coolant tank. The output end of the liquid outlet valve is fixedly connected to a T-connector (first type) via a pipe. The output end of the T-connector (first type) is fixedly connected to the input end of the circulating pump via a pipe. The output end of the circulating pump is fixedly connected to a T-connector (second type) via a pipe. One set of output ends of the T-connector (second type) is fixedly connected to a connecting pipe (third type). The output end of the connecting pipe (third type) is fixedly connected to the input end of a cooling channel (first type). A return flow mechanism is provided at the output end of the liquid outlet channel.

[0008] Preferably, the reflux mechanism includes a three-way solenoid valve one, the output end of the liquid outlet channel is fixedly connected to a connecting pipe two, the three-way solenoid valve one is fixedly connected to the output end of the connecting pipe two, one set of output ends of the three-way solenoid valve one is fixedly connected to another set of input ends of the three-way pipe one, the other set of output ends of the three-way solenoid valve one is fixedly connected to a connecting pipe four, the other set of output ends of the three-way solenoid valve two is fixedly connected to a three-way pipe two, the output end of the connecting pipe four is fixedly connected to the input end of the three-way pipe two, the output end of the three-way pipe two is fixedly connected to a connecting pipe one, and a filter mechanism is provided between the output end of the connecting pipe one and the coolant tank.

[0009] Preferably, the filtration mechanism includes a collection cylinder, which is fixedly installed on the left side of the coolant tank. A sealing cap is threaded onto the top side of the collection cylinder. A filter cylinder is installed inside the collection cylinder. The output end of the connecting pipe is fixedly connected to the top side of the sealing cap. A return pipe is fixedly connected to the bottom side of the collection cylinder. The output end of the return pipe is fixedly connected to the top left side of the coolant tank.

[0010] Preferably, positioning rods are fixedly connected to the bottom four corners of the upper mold, and positioning grooves are opened at the top four corners of the lower mold, with the bottom end of the positioning rod slidably inserted into the positioning groove.

[0011] Preferably, a sealing gasket is engaged at one end of the connecting pipe extending out of the threaded groove.

[0012] Preferably, a temperature sensor is installed at the bottom right side of the coolant tank.

[0013] Preferably, a water level observation window is provided on the right side of the coolant tank.

[0014] Preferably, a controller is also installed on the right side of the coolant tank.

[0015] This invention provides a cooling circulation structure for a plastic watch strap injection mold. Compared with the prior art, it has the following advantages: 1. The cooling circulation structure of this plastic watch strap injection mold, by setting a connecting component, utilizes the cooperation between the conical block and the conical opening, the elastic reset action of the spring, and the auxiliary sealing of the sealing gasket, to achieve reliable connection of the flow channel when the mold is closed and rapid sealing when the mold is opened. When the mold is closed, the ejector rod pushes the conical block to compress the spring, so that the flow channel is unobstructed. After the mold is opened, the spring resets and pushes the conical block to fit tightly against the conical opening, forming a multiple seal with the sealing gasket, which improves the sealing performance of the traditional connection structure.

[0016] 2. The cooling circulation structure of the plastic watch strap injection mold, the circulation cooling component can complete the circulation and delivery of coolant and the complete extraction of residual coolant in the mold by switching the flow direction of two sets of three-way valves and cooperating with a circulation pump. During circulation, the coolant circulates through the flow channel to achieve efficient cooling. During recovery, the residual coolant in the flow channel is quickly pumped back to the water tank by switching the flow direction of two sets of three-way valves. Attached Figure Description

[0017] Figure 1 This is a front view structural diagram of the main body of this utility model; Figure 2 This is a top view of the main structure of the present invention; Figure 3 This is a schematic diagram of the filter mechanism structure of this utility model; Figure 4 This is a schematic diagram of the injection molding groove structure of this utility model; Figure 5 This is a schematic diagram of the cooling channel one and cooling channel two of this utility model; Figure 6 This is a schematic diagram of the connecting component structure of this utility model; Figure 7 This utility model Figure 3 Enlarged schematic diagram of the structure at point A in the middle; Figure 8 This utility model Figure 6 Enlarged schematic diagram of the structure at point B.

[0018] In the diagram: 1. Upper mold base; 2. Upper mold; 3. Lower mold; 4. Lower mold base; 5. Positioning rod; 6. Positioning groove; 7. Injection molding tank; 8. Coolant tank; 9. Controller; 10. Semiconductor cooling plate; 11. Temperature sensor; 12. Water level observation window; 13. Circulating pump; 14. Three-way solenoid valve one; 15. Three-way solenoid valve two; 16. Three-way pipe one; 17. Three-way pipe two; 18. Discharge valve; 19. Return pipe; 20. Connecting pipe 1. Connecting pipe 2; 22. Connecting pipe 3; 23. Connecting pipe 4; 24. Conical block; 25. Sliding rod; 26. Spring; 27. Connecting pipe; 28. Top rod; 29. ​​Sealing gasket; 30. Cooling channel 1; 31. Cooling channel 2; 32. Liquid outlet channel; 33. Collection cylinder; 34. Sealing cap; 35. Filter cylinder; 36. Threaded groove; 37. Injection port; 38. Connecting port; 39. Conical port; 40. Cross fixing plate. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-8 This utility model provides a technical solution: a cooling circulation structure for a plastic watch strap injection mold, including an upper mold base 1 and a lower mold base 4. The upper mold base 1 is disposed on the top side of the lower mold base 4, and an upper mold 2 is fixedly installed on the bottom side of the upper mold base 1. A lower mold 3 is fixedly installed on the top side of the lower mold base 4. An injection molding groove 7 is provided on the side of the upper mold 2 and the lower mold 3 that are close to each other. An injection port 37 is provided on the injection molding groove 7 located on the top side. Cooling channels 2 and 30 are respectively provided inside the upper mold 2 and the lower mold 3. A liquid outlet channel is also provided on the right side of the interior of the lower mold 3. 32, and two sets of threaded grooves 36 are provided on the side of the upper mold 2 and the lower mold 3 that are close to each other. The two sets of threaded grooves 36 on the top side are connected to the input end and the output end of the second cooling channel 31, respectively. The two sets of threaded grooves 36 on the bottom side are connected to the output end of the first cooling channel 30 and the input end of the liquid outlet channel 32, respectively. The output end of the first cooling channel 30 is directly opposite the input end of the second cooling channel 31, and the input end of the liquid outlet channel 32 is directly opposite the output end of the second cooling channel 31. Connecting components are provided on the four sets of threaded grooves 36, and a circulating cooling component is provided on the right side of the lower mold 3.

[0021] When the mold is closed, the upper mold 2 and the lower mold 3 are tightly fitted together. The input and output ends of the cooling channel 2 31 of the upper mold 2 are connected to the output end of the cooling channel 1 30 and the input end of the liquid outlet channel 32 of the lower mold 3 through corresponding connecting components. At this time, the circulating cooling component operates, and the coolant can enter the cooling channel 2 31 through the cooling channel 1 30 and the connecting component in sequence, completing the cooling of the injection molding tank 7 in the upper mold 2 and the lower mold 3. Then, it flows into the liquid outlet channel 32 through the connecting component and finally circulates through the circulating cooling component. When the mold is opened, the upper mold 2 and the lower mold 3 separate, and the connecting component disconnects the connection between the cooling channel 1 30 and the cooling channel 2 31, and between the cooling channel 2 31 and the liquid outlet channel 32 to avoid coolant leakage. During the injection process, the raw material is injected through the injection port 37 on the top side injection molding tank 7 and formed in the injection molding tank 7. At the same time, it is quickly cooled and shaped by the coolant in the cooling channel 1 30 and the cooling channel 2 31.

[0022] The connecting component includes a connecting pipe 27, which is threaded into a threaded groove 36. One end of the connecting pipe 27 extending out of the threaded groove 36 has a tapered opening 39, and the other end of the connecting pipe 27 has a connecting port 38. A cross-shaped fixing plate 40 is fixedly connected to the inner wall of the connecting pipe 27. A sliding rod 25 is slidably mounted on the cross-shaped fixing plate 40. A tapered block 24 is fixedly connected to one end of the sliding rod 25 near the tapered opening 39. The outer surface of the tapered block 24 abuts against the inner surface of the tapered opening 39. A spring 26 is sleeved on the sliding rod 25. The two sides of the spring 26 abut against the tapered block 24 and the cross-shaped fixing plate 40, respectively. A top rod 28 is fixedly connected to one end of the tapered block 24 away from the sliding rod 25.

[0023] When the connecting component is working, the connecting pipe 27 is threaded into the threaded groove 36, and one end of its connecting port 38 is connected to the corresponding cooling channel 1 30, cooling channel 2 31, or liquid outlet channel 32. In its natural state, the spring 26 is in a relaxed state, pushing the outer surface of the conical block 24 to tightly abut against the inner surface of the conical opening 39, thus sealing the conical opening 39. When the mold is closed, the upper mold 2 and the lower mold 3 approach each other, and the two sets of corresponding ejector pins 28 contact each other and generate thrust, pushing the conical block 24 into the connecting pipe 27. At this time, the spring 26 is compressed, the conical block 24 separates from the conical opening 39, and the conical opening 39 opens. When the mold is opened, the two connecting pipes 27 are connected through the conical opening 39. The coolant can enter the connecting pipe 27 through the connecting port 38 and flow to the other connecting pipe 27 through the opened conical opening 39, thus completing the connection between cooling channel 1 30 and cooling channel 2 31, and between cooling channel 2 31 and liquid outlet channel 32. When the mold is opened, the upper mold 2 and the lower mold 3 separate, the thrust between the ejector pins 28 disappears, the spring 26 returns to its relaxed state, and pushes the conical block 24 to abut against the inner surface of the conical opening 39 again, resealing the conical opening 39 and cutting off the connection between cooling channel 1 30 and cooling channel 2 31, and between cooling channel 2 31 and liquid outlet channel 32.

[0024] The circulating cooling assembly includes a coolant tank 8, which is located on the right side of the lower mold 3. Semiconductor cooling pads 10 are installed on both the front and rear sides of the coolant tank 8. A circulating pump 13 is installed between the lower mold 3 and the coolant tank 8. An outlet valve 18 is fixedly connected to the bottom left side of the coolant tank 8. The output end of the outlet valve 18 is fixedly connected to a three-way pipe 16 through a pipe. The output end of the three-way pipe 16 is fixedly connected to the input end of the circulating pump 13 through a pipe. The output end of the circulating pump 13 is fixedly connected to a three-way solenoid valve 15 through a pipe. One set of output ends of the three-way solenoid valve 15 is fixedly connected to a connecting pipe 22. The output end of the connecting pipe 22 is fixedly connected to the input end of the cooling channel 30. A return mechanism is provided at the output end of the outlet channel 32.

[0025] The reflux mechanism includes a three-way solenoid valve 14. The output end of the liquid outlet channel 32 is fixedly connected to a connecting pipe 21. The three-way solenoid valve 14 is fixedly connected to the output end of the connecting pipe 21. One set of output ends of the three-way solenoid valve 14 is fixedly connected to the other set of input ends of the three-way pipe 16. The other set of output ends of the three-way solenoid valve 14 is fixedly connected to a connecting pipe 23. The other set of output ends of the three-way solenoid valve 15 is fixedly connected to a three-way pipe 17. The output end of the connecting pipe 23 is fixedly connected to the input end of the three-way pipe 17. The output end of the three-way pipe 17 is fixedly connected to a connecting pipe 20. A filter mechanism is provided between the output end of the connecting pipe 20 and the coolant tank 8.

[0026] The filtration mechanism includes a collection cylinder 33, which is fixedly installed on the left side of the coolant tank 8. A sealing cap 34 is threaded onto the top side of the collection cylinder 33. A filter cylinder 35 is installed inside the collection cylinder 33. The output end of the connecting pipe 20 is fixedly connected to the top side of the sealing cap 34. A return pipe 19 is fixedly connected to the bottom side of the collection cylinder 33. The output end of the return pipe 19 is fixedly connected to the top left side of the coolant tank 8.

[0027] When the circulating cooling assembly is working, during forward circulation, the coolant in the coolant tank 8 flows out through the outlet valve 18, enters the three-way pipe 16 through the pipe, and then flows into the circulation pump 13. The circulation pump 13 pumps out the coolant and delivers it through the pipe to the three-way solenoid valve 15. At this time, the three-way solenoid valve 15 switches to the state of connecting the connecting pipe 22. The coolant enters the cooling channel 30 through the connecting pipe 22. After completing the cooling of the lower mold 3, it enters the cooling channel 31 and then flows into the outlet channel 32. The coolant in the outlet channel 32 enters the three-way solenoid valve 14 through the connecting pipe 21. At this time, the three-way solenoid valve 14 switches to the state of connecting the connecting pipe 23. The coolant flows into the three-way pipe 17 through the connecting pipe 23 and then enters the collection cylinder 33 through the connecting pipe 20. After being filtered by the filter cylinder 35 in the collection cylinder 33, the coolant flows back to the coolant tank 8 through the return pipe 19, completing the forward circulation and filtration. When the coolant is drawn out, the outlet valve 18 is closed, and the flow direction of the three-way solenoid valve 14 and the three-way solenoid valve 2 is switched. The three-way solenoid valve 14 is switched to the state of connecting the three-way pipe 16, and the three-way solenoid valve 2 is switched to the state of connecting the three-way pipe 2 17. When the circulation pump 13 is operating, the residual coolant in the cooling channel 1 30, the cooling channel 2 31 and the outlet channel 32 enters the three-way solenoid valve 14 through the connecting pipe 2 21 in sequence, then flows into the three-way pipe 16 and enters the circulation pump 13. The circulation pump 13 pumps the drawn-in coolant out to the three-way solenoid valve 2 15, and enters the collection cylinder 33 through the three-way pipe 2 17 and the connecting pipe 1 20. After filtration, it flows back to the coolant tank 8 through the return pipe 19, thereby drawing out all the coolant.

[0028] Positioning rods 5 are fixedly connected to the four bottom corners of the upper mold 2, and positioning grooves 6 are opened at the four top corners of the lower mold 3. The bottom ends of the positioning rods 5 are slidably inserted into the positioning grooves 6. The positioning rods 5 at the four bottom corners of the upper mold 2 cooperate with the positioning grooves 6 at the four top corners of the lower mold 3. During the mold closing process, the bottom ends of the positioning rods 5 slide along the positioning grooves 6. The relative positions of the upper mold 2 and the lower mold 3 are limited by precise size matching, ensuring that the upper mold 2 and the lower mold 3 can be accurately aligned when the mold is closed, so that the output end of the cooling channel 1 30 is precisely connected to the input end of the cooling channel 2 31, and the input end of the liquid outlet channel 32 is precisely connected to the output end of the cooling channel 2 31.

[0029] A sealing gasket 29 is attached to one end of the connecting pipe 27 that extends out of the threaded groove 36. When the upper and lower sets of connecting pipes 27 are connected through the conical opening 39, the sealing gasket 29 fills the gap between the connecting pipe 27 and the outlet of the threaded groove 36, enhances the sealing of the connecting part of the conical opening 39, prevents the coolant from leaking from the gap between the connecting pipe 27 and the mold contact surface during the flow process, and further ensures the sealing of the cooling cycle.

[0030] A temperature sensor 11 is installed at the bottom right side of the coolant tank 8 to monitor the temperature change of the coolant in real time and transmit the temperature signal to the controller 9.

[0031] A water level observation window 12 is provided on the right side of the coolant tank 8. The water level observation window 12 is made of transparent material and is connected to the inner cavity of the tank. The operator can directly observe the coolant level in the coolant tank 8 through the observation window.

[0032] A controller 9 is also installed on the right side of the coolant tank 8. The controller 9 receives the temperature signal transmitted by the temperature sensor 11 and controls the working state of the semiconductor cooling plate 10 in combination with the preset temperature threshold to regulate the coolant temperature. At the same time, the controller 9 can control the on / off state of the three-way solenoid valve 14 and the three-way solenoid valve 2 15 to realize the switching between the forward circulation and suction modes of the coolant. It can also coordinate the operation of components such as the circulation pump 13 and the outlet valve 18 to ensure that the entire cooling circulation system operates stably according to the preset program.

[0033] Working principle: In the cooling circulation structure of this plastic watch strap injection mold, when the mold is closed, the upper mold 2 and the lower mold 3 fit tightly together. The input and output ends of the cooling channel 2 31 of the upper mold 2 are respectively connected to the output end of the cooling channel 1 30 and the input end of the liquid outlet channel 32 of the lower mold 3 through corresponding connecting pipes 27. The connecting pipes 27 are threaded into the threaded grooves 36, and one end of the connecting port 38 is connected to the corresponding cooling channel 1 30, cooling channel 2 31 or liquid outlet channel 32. In the natural state, the spring 26 is in the relaxed state, pushing the outer surface of the conical block 24 to tightly abut against the inner surface of the conical opening 39. To achieve the sealing of the conical opening 39, when the mold is closed, the upper mold 2 and the lower mold 3 approach each other, and the two sets of corresponding ejector rods 28 contact each other and generate thrust, pushing the conical block 24 into the connecting pipe 27. At this time, the spring 26 is compressed, the conical block 24 separates from the conical opening 39, and the conical opening 39 opens, so that the two connecting pipes 27 are connected through the conical opening 39. The coolant can enter the connecting pipe 27 through the connecting port 38 and flow to the other connecting pipe 27 through the opened conical opening 39, completing the connection between the first cooling channel 30 and the second cooling channel 31, and between the second cooling channel 31 and the liquid outlet channel 32. When the mold closes, the raw material is injected through the injection port 37 on the top side injection molding groove 7 and molded within the injection molding groove 7. Simultaneously, the coolant in the coolant tank 8 flows out through the outlet valve 18, enters the three-way pipe 16 through a pipeline, and then flows into the circulation pump 13. The circulation pump 13 pumps out the coolant, which is then transported through a pipeline to the three-way solenoid valve 15. At this time, the three-way solenoid valve 15 switches to the state of connecting to the connecting pipe 22. The coolant then enters the cooling channel 30 through the connecting pipe 22, completing the molding of the lower mold 3. After cooling, the coolant enters the second cooling channel 31 and then flows into the outlet channel 32. The coolant in the outlet channel 32 enters the three-way solenoid valve 14 through the second connecting pipe 21. At this time, the three-way solenoid valve 14 switches to the state of connecting the fourth connecting pipe 23. The coolant flows into the second three connecting pipe 17 through the fourth connecting pipe 23 and then enters the collection cylinder 33 through the first connecting pipe 20. After being filtered by the filter cylinder 35 in the collection cylinder 33, the coolant flows back to the coolant tank 8 through the return pipe 19, completing the circulation cooling and filtration. Before opening the mold, first close the outlet valve 18, then switch the flow direction of the three-way solenoid valve 14 and the three-way solenoid valve 25. The three-way solenoid valve 14 is switched to the state of connecting to the three-way pipe 16, and the three-way solenoid valve 215 is switched to the state of connecting to the three-way pipe 217. When the circulation pump 13 is operating, the residual coolant in the cooling channel 10, the cooling channel 21 and the outlet channel 32 enters the three-way solenoid valve 14 through the connecting pipe 21, then flows into the three-way pipe 16 and enters the circulation pump 13. The circulation pump 13 pumps the sucked coolant out to the three-way solenoid valve 215, and enters the collection cylinder 33 through the three-way pipe 217 and the connecting pipe 120. After filtration, it flows back to the coolant tank 8 through the return pipe 19, thereby sucking back all the coolant in the mold.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cooling circulation structure for a plastic watch strap injection mold, comprising an upper mold base (1) and a lower mold base (4), characterized in that: The upper mold base (1) is located on the top side of the lower mold base (4). The upper mold (2) is fixedly installed on the bottom side of the upper mold base (1), and the lower mold (3) is fixedly installed on the top side of the lower mold base (4). The upper mold (2) and the lower mold (3) are provided with injection molding grooves (7) on the sides of the upper mold (2) and the lower mold (3) that are close to each other. The injection molding grooves (7) located on the top side are provided with injection ports (37). The upper mold (2) and the lower mold (3) are respectively provided with cooling channel two (31) and cooling channel one (30). The lower mold (3) is also provided with a liquid outlet channel (32) on the right side of the interior. The upper mold (2) and the lower mold (3) are respectively provided with injection ports (31) and injection ports (37) on the top side of the lower mold (4). Two sets of threaded grooves (36) are provided on the side closest to each other. The two sets of threaded grooves (36) on the top side are connected to the input end and the output end of the second cooling channel (31) respectively. The two sets of threaded grooves (36) on the bottom side are connected to the output end of the first cooling channel (30) and the input end of the liquid outlet channel (32) respectively. The output end of the first cooling channel (30) is directly opposite the input end of the second cooling channel (31), and the input end of the liquid outlet channel (32) is directly opposite the output end of the second cooling channel (31). A connecting component is provided on the four sets of threaded grooves (36). A circulating cooling component is provided on the right side of the lower mold (3).

2. The cooling circulation structure of a plastic watch strap injection mold according to claim 1, characterized in that: The connecting component includes a connecting pipe (27), which is threaded into a threaded groove (36). One end of the connecting pipe (27) extending out of the threaded groove (36) has a tapered opening (39), and the other end of the connecting pipe (27) has a connecting port (38). A cross-shaped fixing plate (40) is fixedly connected to the inner wall of the connecting pipe (27). A sliding rod (25) is slidably passed through the cross-shaped fixing plate (40). A tapered block (24) is fixedly connected to one end of the sliding rod (25) near the tapered opening (39). The outer surface of the tapered block (24) abuts against the inner surface of the tapered opening (39). A spring (26) is sleeved on the sliding rod (25). The two sides of the spring (26) abut against the tapered block (24) and the cross-shaped fixing plate (40) respectively. A top rod (28) is fixedly connected to one end of the tapered block (24) away from the sliding rod (25).

3. The cooling circulation structure of a plastic watch strap injection mold according to claim 1, characterized in that: The circulating cooling assembly includes a coolant tank (8), which is located on the right side of the lower mold (3). Semiconductor cooling plates (10) are installed on both the front and rear sides of the coolant tank (8). A circulating pump (13) is provided between the lower mold (3) and the coolant tank (8). An outlet valve (18) is fixedly connected to the bottom left side of the coolant tank (8). The output end of the outlet valve (18) is fixedly connected to a three-way pipe (16) through a pipe. The output end of the three-way pipe (16) is fixedly connected to the input end of the circulating pump (13) through a pipe. The output end of the circulating pump (13) is fixedly connected to a three-way solenoid valve (15) through a pipe. One set of output ends of the three-way solenoid valve (15) is fixedly connected to a connecting pipe (22). The output end of the connecting pipe (22) is fixedly connected to the input end of the cooling channel (30). A return mechanism is provided at the output end of the outlet channel (32).

4. The cooling circulation structure of a plastic watch strap injection mold according to claim 3, characterized in that: The reflux mechanism includes a three-way solenoid valve (14), the output end of the liquid outlet channel (32) is fixedly connected to a connecting pipe (21), the three-way solenoid valve (14) is fixedly connected to the output end of the connecting pipe (21), one set of output ends of the three-way solenoid valve (14) is fixedly connected to the other set of input ends of the three-way pipe (16), the other set of output ends of the three-way solenoid valve (14) is fixedly connected to a connecting pipe (23), the other set of output ends of the three-way solenoid valve (15) is fixedly connected to a three-way pipe (17), the output end of the connecting pipe (23) is fixedly connected to the input end of the three-way pipe (17), the output end of the three-way pipe (17) is fixedly connected to a connecting pipe (20), and a filter mechanism is provided between the output end of the connecting pipe (20) and the coolant tank (8).

5. The cooling circulation structure of a plastic watch strap injection mold according to claim 4, characterized in that: The filtration mechanism includes a collection cylinder (33), which is fixedly installed on the left side of the coolant tank (8). A sealing cap (34) is threaded onto the top side of the collection cylinder (33). A filter cylinder (35) is provided inside the collection cylinder (33). The output end of the connecting pipe (20) is fixedly connected to the top side of the sealing cap (34). A return pipe (19) is fixedly connected to the bottom side of the collection cylinder (33). The output end of the return pipe (19) is fixedly connected to the top left side of the coolant tank (8).

6. The cooling circulation structure of a plastic watch strap injection mold according to claim 1, characterized in that: The upper mold (2) is fixedly connected to the four bottom corners with positioning rods (5), and the lower mold (3) is provided with positioning grooves (6) at the four top corners. The bottom end of the positioning rod (5) is slidably inserted into the positioning groove (6).

7. The cooling circulation structure of a plastic watch strap injection mold according to claim 2, characterized in that: The end of the connecting pipe (27) extending out of the threaded groove (36) is fitted with a sealing gasket (29).

8. The cooling circulation structure of a plastic watch strap injection mold according to claim 3, characterized in that: A temperature sensor (11) is installed on the bottom right side of the coolant tank (8).

9. The cooling circulation structure of a plastic watch strap injection mold according to claim 3, characterized in that: A water level observation window (12) is provided on the right side of the coolant tank (8).

10. The cooling circulation structure of a plastic watch strap injection mold according to claim 3, characterized in that: A controller (9) is also installed on the right side of the coolant tank (8).

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