A sensing structure for a hydraulic press used in the injection molding of fluororubber watch straps.

Abstract

This utility model belongs to the field of fluororubber watch strap injection molding technology, specifically a sensing structure for a hydraulic press in fluororubber watch strap injection molding. It includes a worktable, with a hydraulic cylinder mounted above the worktable. Guide columns are fixedly installed at the four corners between the worktable and the hydraulic cylinder. A lifting plate is fixedly installed at the bottom output end of the hydraulic cylinder. This utility model, by incorporating a high-precision position sensor and a slow-rising speed sensor in the sensing component, can accurately collect the position information of the lifting plate and the mold in real time. The power output of the hydraulic cylinder is adjusted through a control switch panel and electrical control cabinet. Compared to existing single sensors, this structure can more sensitively capture changes in the mold position during the molding process, ensuring mold closing accuracy during primary and secondary molding, and effectively avoiding product defects caused by mold thinning and slow secondary pressurization during secondary molding.

Description

Technical Field

[0001] This utility model relates to the field of fluororubber watch strap injection molding technology, specifically to a sensing structure for a hydraulic press in fluororubber watch strap injection molding. Background Technology

[0002] Fluororubber watch straps are made of high-performance fluororubber. Because their main and side chains contain fluorine atoms, they possess excellent high-temperature resistance, chemical corrosion resistance, and abrasion resistance, making them widely used in sports, diving, high-temperature environments, and chemical industries. Their high density and delicate texture, combined with skin-friendly comfort and durability, make them a high-end choice for smartwatches. The production process requires injection molding hydraulic presses, using a hot-pressing process to combine the fluororubber material with the mold, ensuring the precise molding of complex structures.

[0003] In the injection molding process of fluororubber watch straps, the hydraulic press is only equipped with a single slow-speed lifting sensor. When the mold with the middle plate needs to be molded twice, the mold becomes thinner because the middle plate is not used in the second molding. Due to the insufficient sensing accuracy of the single sensor, it is difficult to accurately monitor the position information of the mold, which in turn affects the precise adjustment of the hydraulic cylinder's power output. This results in slow mold entry and pressurization during the second molding, making the product prone to chipping and affecting product quality. To address this, we propose a sensing structure for the hydraulic press used in the injection molding of fluororubber watch straps. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a sensing structure for a hydraulic press used in the injection molding of fluororubber watch straps. By incorporating a high-precision position sensor and a slow-rise sensor into the sensing component, the position information of the lifting plate and the mold can be accurately collected in real time. Furthermore, the power output of the hydraulic cylinder can be adjusted in conjunction with the control switch panel and the electrical control cabinet, thus solving the problems mentioned earlier.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sensing structure for a hydraulic press used in the injection molding of fluororubber watch straps, comprising a worktable, a hydraulic cylinder mounted above the worktable, guide columns fixedly installed at the four corners between the worktable and the hydraulic cylinder, a lifting plate fixedly installed at the bottom output end of the hydraulic cylinder, the lifting plate slidably mounted on four sets of guide columns at its four corners, and a sensing component for adjusting the power output of the hydraulic cylinder mounted on the worktable. An upper mold base is fixedly installed at the bottom center of the lifting plate. A moving mold is fixedly installed at the bottom side of the upper mold base. A base plate is fixedly installed at the top center of the worktable. A lower mold base is provided on the top side of the base plate. A quick-release assembly is provided between the base plate and the lower mold base. A fixed mold is fixedly installed on the top side of the lower mold base. A middle plate is provided on the top side of the fixed mold. A quick-release assembly is provided between the fixed mold and the middle plate. An injection molding assembly is installed between the moving mold and the lower mold base. An ejector assembly is installed between the lower mold base and the fixed mold.

[0006] Preferably, the sensing component includes a control switch panel, which is installed on the right side of the workbench. A high-precision position sensor and a slow-rise sensor are installed on the top right side of the workbench, and the high-precision position sensor and the slow-rise sensor are located directly below the right side of the lifting plate. An electrical control cabinet is also installed on the right side of the workbench.

[0007] Preferably, the quick-assembly assembly includes a cylinder, which is fixedly installed on the inner top side of the workbench. A connecting plate is fixedly connected to the output end of the cylinder. A second lifting plate is fixedly connected to the top side of the connecting plate. Several insert rods are fixedly connected to the top side of the second lifting plate. The insert rods slide through the top of the workbench. T-shaped plates are fixedly connected to the left and right sides of the bottom of the lower mold base. T-shaped grooves are opened through the left and right sides of the base plate. The T-shaped plates are slidably connected to the T-shaped grooves. Several slots are opened on the bottom side of the T-shaped plates. The insert rods are slidably inserted into the slots.

[0008] Preferably, the quick-release assembly includes a plurality of threaded posts, all of which are fixedly connected to the top side of the fixed mold. A plurality of fixing holes are provided through the middle plate, and the threaded posts are inserted into the fixing holes. A threaded sleeve is threadedly sleeved at the top of the threaded post, and the bottom side of the threaded sleeve abuts against the top side of the middle plate. A plurality of circular grooves are provided on the bottom side of the moving mold, and the threaded sleeve and threaded posts are disposed inside the circular grooves.

[0009] Preferably, the injection molding assembly includes a gate, which is located in the middle of the bottom side of the moving mold. The bottom side of the moving mold has a plurality of first grooves, and the top side of the fixed mold has a plurality of second grooves. The top sides of the second grooves all penetrate the middle plate. The first grooves are located directly above the second grooves. An injection runner is penetrated through the middle of the middle plate. The second grooves are all connected to the injection runner, and the gate is connected to the injection runner.

[0010] Preferably, the ejector assembly includes an ejector plate. A mounting groove is formed through the top side of the lower mold base. The ejector plate is disposed inside the mounting groove. A plurality of ejector rods are fixedly connected to the top side of the ejector plate. A sliding groove is formed through the bottom side of each of the plurality of grooves. The ejector rods are slidably connected to the sliding grooves. Limiting rods are fixedly connected to the four corners of the bottom side of the ejector plate. Limiting tubes are slidably fitted onto each of the four sets of limiting rods. The four sets of limiting tubes are fixedly connected to the bottom side of the mounting groove. Springs are fitted onto each of the four sets of limiting tubes. The top side of each spring abuts against the bottom side of the ejector plate. A linkage mechanism is also provided between the moving mold and the ejector plate.

[0011] Preferably, the linkage mechanism includes several linkage rods, all of which are fixedly connected to the top side of the lifting plate. Several sliding grooves are provided through the fixed mold, and the linkage rods slide through the sliding grooves. Several circular holes are provided through the middle plate, and the circular holes are fitted onto the linkage rods. The diameter of the circular holes is larger than the diameter of the sliding grooves. Several spring grooves are provided on the top side of the moving mold. A sliding groove is provided through the bottom side of the spring grooves. A downward pressing rod slides through the sliding groove. A sliding plate is fixedly connected to the top of the downward pressing rod. The bottom side of the sliding plate abuts against the inner bottom side of the spring groove. A spring is provided inside the spring groove. The upper and lower sides of the spring abut against the bottom side of the upper mold base and the top side of the sliding plate, respectively. The downward pressing rod is located directly above the linkage rod. The diameter of the downward pressing rod is larger than the diameter of the linkage rod. The bottom end of the downward pressing rod abuts against the top side of the fixed mold, and the top end of the linkage rod abuts against the bottom end of the downward pressing rod.

[0012] Preferably, positioning rods are fixedly connected to the four corners of the bottom side of the moving mold, and positioning grooves are opened through the four corners between the fixed mold and the middle plate, with the positioning rods slidably inserted into the positioning grooves.

[0013] Preferably, several anti-slip strips are fixedly connected to both the left and right sides of the lower mold base.

[0014] Preferably, a protective baffle is fixedly installed on the top edge of the workbench, and safety light curtains are installed on the left and right sides of the front part of the protective baffle.

[0015] This invention provides a sensing structure for a hydraulic press used in the injection molding of fluororubber watch straps. Compared with existing technologies, it has the following advantages:

[0016] 1. This invention relates to a sensing structure for a hydraulic press used in the injection molding of fluororubber watch straps. By incorporating a high-precision position sensor and a slow-speed lifting sensor in the sensing components, it can accurately collect real-time position information of the lifting plate and the mold. The power output of the hydraulic cylinder can be adjusted in conjunction with the control switch panel and the electrical control cabinet. Compared to existing single sensors, this structure can more sensitively capture changes in the mold position during the molding process, ensuring the mold closing accuracy during primary and secondary molding. It effectively avoids the problem of product defects caused by mold thinning and slow secondary mold pressurization during secondary molding.

[0017] 2. The induction structure of the hydraulic press for injection molding of fluororubber watch straps is described. The lower mold base of the quick-release component slides and connects with the T-shaped groove of the base plate through a T-shaped plate. It is quickly fixed by inserting the cylinder-driven rod into the slot. The middle plate of the quick-release component is locked by a threaded sleeve after passing through the fixing hole of the threaded post. It can be separated by simply loosening the threaded sleeve during disassembly. This greatly simplifies the mold change process of one-time molding and reduces downtime.

[0018] 3. The hydraulic press induction structure for injection molding of fluororubber watch straps has a material ejector assembly that is mechanically linked to the moving mold through a linkage mechanism. When the moving mold descends, the pressure rod pushes the linkage rod to drive the lifting plate to compress the second spring. After molding is completed, the second spring resets and drives the lifting plate to rise. The material ejector rod ejects the product along the second slide groove, thus avoiding problems such as product deformation and scratches caused by manual material handling during one-time molding. Attached Figure Description

[0019] Figure 1 This is a front view structural diagram of the main body of this utility model;

[0020] Figure 2 This is a schematic diagram of the main body of this utility model from another angle.

[0021] Figure 3 This is a partial structural diagram of the quick-assembly component of this utility model;

[0022] Figure 4 This is a partial structural diagram of the quick-assembly component and linkage mechanism of this utility model;

[0023] Figure 5 This is a schematic diagram of the disassembled structure of the base plate, lower mold base, and fixed mold of this utility model;

[0024] Figure 6 This is a partial structural diagram of the quick-release assembly and the top-loading assembly of this utility model;

[0025] Figure 7 This is a schematic diagram of the internal structure of the mounting slot of this utility model.

[0026] In the diagram: 1. Workbench; 2. Control switch panel; 3. Electrical control cabinet; 4. Hydraulic cylinder; 5. Guide column; 6. Lifting plate one; 7. Protective baffle; 8. Safety light curtain; 9. Upper mold base; 10. Moving mold; 11. Base plate; 12. Lower mold base; 13. Fixed mold; 14. Positioning rod; 15. Groove one; 16. Lower pressure rod; 17. Circular groove; 18. Inlet; 19. Cylinder; 20. Lifting plate two; 21. Connecting plate; 22. Spring groove; 23. Slide groove one; 24. Spring one; 25. Sliding plate one; 6. Spring II; 27. T-shaped plate; 28. T-shaped groove; 29. ​​Insert rod; 30. Anti-slip strip; 31. Positioning groove; 32. Shaped groove II; 33. Slide groove II; 34. Slide groove III; 35. Slot; 36. Fixing hole; 37. Threaded sleeve; 38. Round hole; 39. Threaded column; 40. Injection runner; 41. Lifting plate; 42. Linkage rod; 43. Ejector rod; 44. Mounting groove; 45. Limiting rod; 46. Middle plate; 47. Limiting tube; 48. High-precision position sensor; 49. Slow-rising sensor. Detailed Implementation

[0027] 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.

[0028] Please see Figure 1-7 This utility model provides a technical solution: a sensing structure for a hydraulic press in the injection molding production of fluororubber watch straps, including a worktable 1, a hydraulic cylinder 4 disposed above the worktable 1, guide posts 5 fixedly installed at the four corners between the worktable 1 and the hydraulic cylinder 4, a lifting plate 6 fixedly installed at the bottom output end of the hydraulic cylinder 4, the four corners of the lifting plate 6 being slidably sleeved on four sets of guide posts 5, a sensing component for adjusting the power output of the hydraulic cylinder 4 installed on the worktable 1, and a sensor fixedly installed at the bottom center of the lifting plate 6. The upper mold base 9 has a movable mold 10 fixedly installed on its bottom side. The bottom plate 11 is fixedly installed on the top center of the worktable 1. The bottom mold base 12 is provided on the top side of the bottom plate 11. A quick-release assembly is provided between the bottom plate 11 and the bottom mold base 12. The fixed mold 13 is fixedly installed on the top side of the bottom mold base 12. The middle plate 46 is provided on the top side of the fixed mold 13. A quick-release assembly is provided between the fixed mold 13 and the middle plate 46. An injection molding assembly is installed between the movable mold 10 and the bottom mold base 12. An ejector assembly is installed between the bottom mold base 12 and the fixed mold 13.

[0029] When the hydraulic press for injection molding of the fluororubber watch strap is in operation, the hydraulic cylinder 4 drives the lifting plate 6 to slide up and down along the four sets of guide columns 5. The upper mold base 9 and the moving mold 10 on the bottom side of the lifting plate 6 move synchronously. The sensing component on the worktable 1 adjusts the power output of the hydraulic cylinder 4 to adapt to different molding requirements. The lower mold base 12 on the top side of the base plate 11 is quickly connected and fixed to the base plate 11 through a quick-release component. The middle plate 46 on the top side of the fixed mold 13 is easily disassembled and assembled with the fixed mold 13 through a quick-release component. The injection component between the moving mold 10 and the lower mold base 12 is responsible for injecting the raw material into the mold cavity to complete the injection molding process. The ejector component between the lower mold base 12 and the fixed mold 13 ejects the molded product after the injection molding is completed.

[0030] The sensing components include a control switch panel 2, which is installed on the right side of the workbench 1. A high-precision position sensor 48 and a slow-rise sensor 49 are installed on the top right side of the workbench 1, and the high-precision position sensor 48 and the slow-rise sensor 49 are located directly below the lifting plate 6 on the right side. An electrical control cabinet 3 is also installed on the right side of the workbench 1.

[0031] When the sensing components are working, the control switch panel 2 is installed on the right side of the workbench 1. The equipment can be quickly switched between one-time molding and two-time molding by operating the control switch panel 2. The high-precision position sensor 48 and the slow-speed lifting sensor 49 on the top right side of the workbench 1 are located directly below the lifting plate 6 on the right side. They can monitor the position information of the lifting plate 6 in real time. The electrical control cabinet 3 on the right side of the workbench 1 receives the signals transmitted by the sensors and adjusts the power output of the hydraulic cylinder 4 according to the signals to achieve precise control of the pressure for one-time molding or two-time molding.

[0032] The quick-assembly assembly includes a cylinder 19, which is fixedly installed on the top side inside the workbench 1. A connecting plate 21 is fixedly connected to the output end of the cylinder 19. A lifting plate 20 is fixedly connected to the top side of the connecting plate 21. Several insert rods 29 are fixedly connected to the top side of the lifting plate 20. The insert rods 29 slide through the top of the workbench 1. T-shaped plates 27 are fixedly connected to the left and right sides of the bottom of the lower mold base 12. T-shaped grooves 28 are opened through the left and right sides of the base plate 11. The T-shaped plates 27 are slidably connected to the T-shaped grooves 28. Several slots 35 are opened on the bottom side of the T-shaped plates 27. The insert rods 29 are slidably inserted into the slots 35.

[0033] When the quick-assembly assembly is in operation, the cylinder 19 is fixed inside the top side of the workbench 1. Its output end drives the lifting plate 20 to move up and down through the connecting plate 21. Several insert rods 29 on the top side of the lifting plate 20 slide along the top of the workbench 1. The T-shaped plates 27 on the left and right sides of the bottom of the lower mold base 12 can slide along the T-shaped grooves 28 on the left and right sides of the base plate 11 to achieve the initial positioning of the lower mold base 12 and the base plate 11. When the T-shaped plate 27 slides to the designated position, the insert rods 29 slide upward and insert into the slots 35 on the bottom side of the T-shaped plate 27 to complete the fixing of the lower mold base 12 and the base plate 11.

[0034] The quick-release assembly includes several threaded posts 39, which are fixedly connected to the top side of the fixed mold 13. Several fixing holes 36 are provided through the middle plate 46, and the threaded posts 39 are inserted through the fixing holes 36. The top of the threaded post 39 is threadedly fitted with a threaded sleeve 37, and the bottom side of the threaded sleeve 37 abuts against the top side of the middle plate 46. Several circular grooves 17 are provided on the bottom side of the moving mold 10, and the threaded sleeve 37 and the threaded post 39 are disposed inside the circular grooves 17.

[0035] When the quick-release assembly is in operation, several threaded pins 39 on the top side of the fixed mold 13 pass through the fixing holes 36 of the middle plate 46. By rotating the threaded sleeve 37 at the top of the threaded pin 39, the bottom side of the threaded sleeve 37 abuts against the top side of the middle plate 46, thereby fixing the middle plate 46 on the fixed mold 13. The circular groove 17 on the bottom side of the moving mold 10 provides a space for the threaded sleeve 37 and the threaded pins 39, avoiding interference between the moving mold 10 and the threaded sleeve 37 and the threaded pins 39. When disassembling, the middle plate 46 can be removed from the fixed mold 13 by rotating the threaded sleeve 37 in the opposite direction.

[0036] The injection assembly includes a sprue 18, which is located in the middle of the bottom side of the moving mold 10. The bottom side of the moving mold 10 has several first grooves 15, and the top side of the fixed mold 13 has several second grooves 32. The top sides of the second grooves 32 all penetrate the middle plate 46. The first grooves 15 are located directly above the second grooves 32. The middle plate 46 has an injection runner 40 penetrating through the middle. The second grooves 32 are all connected to the injection runner 40, and the sprue 18 is connected to the injection runner 40.

[0037] When the injection molding assembly is working, the injection material enters through the injection port 18 in the middle of the bottom side of the moving mold 10, and after being diverted by the injection runner 40 in the middle of the middle plate 46, it is transported to several grooves 32 on the top side of the fixed mold 13. The groove 15 on the bottom side of the moving mold 10 is located directly above the groove 32. When the mold is closed, the groove 15 and the groove 32 form a closed cavity, and the material is formed in the cavity, completing the injection molding process of the fluororubber watch strap.

[0038] The ejector assembly includes an ejector plate 41. A mounting groove 44 is provided through the top side of the lower mold base 12. The ejector plate 41 is located inside the mounting groove 44. Several ejector rods 43 are fixedly connected to the top side of the ejector plate 41. Several grooves 32 are provided through the bottom side of the grooves 32. The ejector rods 43 are slidably connected to the grooves 33. Limiting rods 45 are fixedly connected to the four corners of the bottom side of the ejector plate 41. Limiting tubes 47 are slidably sleeved on the four sets of limiting rods 45. The four sets of limiting tubes 47 are fixedly connected to the bottom side of the mounting groove 44. Springs 26 are sleeved on the four sets of limiting tubes 47. The top side of the springs 26 abuts against the bottom side of the ejector plate 41. A linkage mechanism is also provided between the moving mold 10 and the ejector plate 41.

[0039] The linkage mechanism includes several linkage rods 42, all of which are fixedly connected to the top side of the lifting plate 41. Several sliding grooves 34 are provided through the fixed mold 13, and the linkage rods 42 slide through these grooves 34. Several circular holes 38 are provided through the middle plate 46, and these holes 38 are fitted onto the linkage rods 42, with the diameter of the holes 38 being larger than the diameter of the sliding grooves 34. Several spring grooves 22 are provided on the top side of the moving mold 10, and a sliding groove 23 is provided through the bottom side of each spring groove 22, with a downward pressure rod sliding through the sliding groove 23. 16. A sliding plate 25 is fixedly connected to the top of the lower pressure rod 16. The bottom side of the sliding plate 25 abuts against the bottom side of the inside of the spring groove 22. A spring 24 is provided inside the spring groove 22. The upper and lower sides of the spring 24 abut against the bottom side of the upper mold base 9 and the top side of the sliding plate 25, respectively. The lower pressure rod 16 is located directly above the linkage rod 42. The diameter of the lower pressure rod 16 is larger than the diameter of the linkage rod 42. The bottom end of the lower pressure rod 16 abuts against the top side of the fixed mold 13. The top end of the linkage rod 42 abuts against the bottom end of the lower pressure rod 16.

[0040] When the ejector assembly is working, the ejector plate 41 is set in the mounting groove 44 on the top side of the lower mold base 12. Several ejector rods 43 on its top side slide along the sliding groove 33 on the bottom side of the mold groove 32. The limiting rods 45 at the four corners of the bottom side of the ejector plate 41 are sleeved in the limiting tubes 47 on the bottom side of the mounting groove 44. The springs 26 on the limiting tubes 47 lift the ejector plate 41. The linkage rod 42 on the top side of the ejector plate 41 slides along the sliding groove 34 of the fixed mold 13. The round hole 38 of the middle plate 46 is sleeved outside the linkage rod 42. Spring 24 in spring groove 22 on top side of moving mold 10 abuts against sliding plate 25. The pressure rod 16 on the bottom side of sliding plate 25 slides along slide groove 23, and its bottom end abuts against the top side of fixed mold 13. The top end of linkage rod 42 abuts against the bottom end of pressure rod 16. When moving mold 10 descends, pressure rod 16 pushes linkage rod 42, causing lifting plate 41 to compress spring 26. When moving mold 10 rises, spring 26 resets and pushes lifting plate 41. Ejector rod 43 ejects the formed product along slide groove 33.

[0041] Positioning rods 14 are fixedly connected to the four corners of the bottom side of the moving mold 10. Positioning slots 31 are opened through the four corners between the fixed mold 13 and the middle plate 46. The positioning rods 14 are slidably inserted into the positioning slots 31. During the process of the moving mold 10 descending with the lifting plate 16, the positioning rods 14 at the four corners of the bottom side of the moving mold 10 will be slidably inserted into the positioning slots 31 opened through the four corners of the fixed mold 13 and the middle plate 46. Through the cooperation of the positioning rods 14 and the positioning slots 31, the moving mold 10, the fixed mold 13, and the middle plate 46 are accurately aligned when the mold is closed, so as to avoid the injection accuracy being affected by the positional deviation.

[0042] Several anti-slip strips 30 are fixedly connected to both the left and right sides of the lower mold base 12. The anti-slip strips 30 fixedly connected to the left and right sides of the lower mold base 12 can increase the friction between the operator's hand and the lower mold base 12 when the operator moves or adjusts the lower mold base 12, prevent slippage during the installation, disassembly or movement of the lower mold base 12, and improve the stability and safety of the operation.

[0043] A protective baffle 7 is fixedly installed on the top edge of the workbench 1. Safety light curtains 8 are installed on the left and right sides of the front part of the protective baffle 7. The protective baffle 7 on the top edge of the workbench 1 forms a physical barrier and plays a role in isolating and protecting the working area of ​​the workbench 1. The safety light curtains 8 installed on the left and right sides of the front part of the protective baffle 7 can monitor the area it covers in real time. When an object or limb is detected to enter the area, the relevant safety mechanism of the equipment can be triggered to stop the operation of the hydraulic press in time and avoid safety accidents.

[0044] Working principle: This hydraulic press for injection molding fluororubber watch straps, during the installation of the lower mold for one-time molding, because cylinder 19 is fixed inside the top side of the worktable 1, its output end drives the lifting plate 20 to move up and down through the connecting plate 21. Several insert rods 29 on the top side of the lifting plate 20 slide along the top of the worktable 1. The T-shaped plates 27 on the left and right sides of the bottom of the lower mold base 12 can slide along the T-shaped grooves 28 on the left and right sides of the base plate 11, realizing the initial positioning of the lower mold base 12 and the base plate 11. When the T-shaped plates 27 slide to the designated position, the insert rods 29 move towards the bottom. The upper mold 12 slides up and inserts into the slot 35 on the bottom side of the T-shaped plate 27 to complete the fixation of the lower mold base 12 and the base plate 11. Since several threaded pins 39 on the top side of the fixed mold 13 pass through the fixing holes 36 of the middle plate 46, by rotating the threaded sleeve 37 at the top of the threaded pin 39, the bottom side of the threaded sleeve 37 abuts against the top side of the middle plate 46, thereby fixing the middle plate 46 on the fixed mold 13. The circular groove 17 on the bottom side of the moving mold 10 provides a space for the threaded sleeve 37 and the threaded pin 39 to avoid interference between the moving mold 10 and the threaded sleeve 37 and the threaded pin 39.

[0045] During one-time molding, the equipment is quickly switched to one-time molding mode via the control switch panel 2. The hydraulic cylinder 4 operates, and its bottom output end drives the lifting plate 16 to slide up and down along the four sets of guide columns 5. The upper mold base 9 and the moving mold 10 on the bottom side of the lifting plate 16 move synchronously, closing with the fixed mold 13 at the bottom. The injection material enters through the injection port 18 in the middle of the bottom side of the moving mold 10, and after being diverted by the injection flow channel 40 in the middle of the middle plate 46, it is transported to several grooves 32 on the top side of the fixed mold 13. The groove 15 on the bottom side of the moving mold 10 is located directly above the groove 32. When the mold is closed, the groove 15 and the groove 32 form a closed cavity, and the material is formed in the cavity, completing the one-time molding injection process of the fluororubber watch strap. Since the lifting plate 41 is set in the mounting groove 44 on the top side of the lower mold base 12, several ejector rods 43 on its top side slide along the groove 32. 2. The sliding groove 233 on the bottom side slides, and the limiting rods 45 at the four corners of the bottom side of the lifting plate 41 are sleeved in the limiting tubes 47 on the bottom side of the mounting groove 44. The spring 26 on the limiting tube 47 lifts the lifting plate 41. The linkage rod 42 on the top side of the lifting plate 41 slides along the sliding groove 34 of the fixed mold 13. The round hole 38 of the middle plate 46 is sleeved outside the linkage rod 42. The spring 24 in the spring groove 22 on the top side of the moving mold 10 abuts against the sliding plate 25. The pressure rod 16 on the bottom side of the sliding plate 25 slides along the sliding groove 23, and its bottom end abuts against the top side of the fixed mold 13. The top end of the linkage rod 42 abuts against the bottom end of the pressure rod 16. When the moving mold 10 descends, the pressure rod 16 pushes the linkage rod 42, which drives the lifting plate 41 to compress the spring 26. When the moving mold 10 rises, the spring 26 resets and pushes the lifting plate 41. The ejector rod 43 ejects the one-time molded product along the sliding groove 23.

[0046] During secondary molding, since the middle plate 46 is not used, the overall secondary molding mold will become thinner. At this time, the equipment can be quickly switched to secondary molding mode by operating the control switch panel 2. Since the high-precision position sensor 48 and the slow-speed lifting sensor 49 on the top right side of the worktable 1 are located directly below the lifting plate 6 on the right side, they can monitor the position information of the lifting plate 6 in real time. The electrical control cabinet 3 on the right side of the worktable 1 receives the signals transmitted by the sensors and adjusts the power output of the hydraulic cylinder 4 according to the signals, thereby realizing precise control of the pressure for primary molding or secondary molding to adapt to different molding requirements.

[0047] 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.

[0048] 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 sensing structure for a hydraulic press used in the injection molding of fluororubber watch straps, comprising a worktable (1), characterized in that: A hydraulic cylinder (4) is provided above the workbench (1). Guide columns (5) are fixedly installed at the four corners between the workbench (1) and the hydraulic cylinder (4). A lifting plate (6) is fixedly installed at the bottom output end of the hydraulic cylinder (4). The four corners of the lifting plate (6) are respectively slidably sleeved on the four sets of guide columns (5). A sensing component for adjusting the power output of the hydraulic cylinder (4) is installed on the workbench (1). An upper mold base (9) is fixedly installed in the middle of the bottom side of the lifting plate (6). A moving mold (10) is fixedly installed on the bottom side of the upper mold base (9). A base plate (11) is fixedly installed on the top side of the workbench (1). A lower mold base (12) is provided on the top side of the base plate (11). A quick-release assembly is provided between the base plate (11) and the lower mold base (12). A fixed mold (13) is fixedly installed on the top side of the lower mold base (12). A middle plate (46) is provided on the top side of the fixed mold (13). A quick-release assembly is provided between the fixed mold (13) and the middle plate (46). An injection molding assembly is installed between the moving mold (10) and the lower mold base (12). An ejector assembly is installed between the lower mold base (12) and the fixed mold (13).

2. The induction structure of the fluororubber watchband injection molding production oil press according to claim 1, characterized in that: The sensing component includes a control switch panel (2), which is installed on the right side of the workbench (1). A high-precision position sensor (48) and a slow-rise sensor (49) are installed on the top right side of the workbench (1), and the high-precision position sensor (48) and the slow-rise sensor (49) are located directly below the right side of the lifting plate (6). An electrical control cabinet (3) is also installed on the right side of the workbench (1).

3. The induction structure of the fluororubber watchband injection molding production oil press according to claim 1, characterized in that: The quick-assembly assembly includes a cylinder (19), which is fixedly installed on the top side inside the workbench (1). The output end of the cylinder (19) is fixedly connected to a connecting plate (21). The top side of the connecting plate (21) is fixedly connected to a lifting plate (20). The top side of the lifting plate (20) is fixedly connected to several insert rods (29). Several insert rods (29) slide through the top of the workbench (1). The bottom left and right sides of the lower mold base (12) are fixedly connected to T-shaped plates (27). The left and right sides of the base plate (11) are provided with T-shaped grooves (28). The T-shaped plates (27) slide through the T-shaped grooves (28). Several slots (35) are provided on the bottom side of the T-shaped plates (27). The insert rods (29) slide into the slots (35).

4. The induction structure of the fluororubber watchband injection molding production oil press according to claim 1, characterized in that: The quick-release assembly includes several threaded posts (39), all of which are fixedly connected to the top side of the fixed mold (13). Several fixing holes (36) are provided through the middle plate (46), and the threaded posts (39) are inserted through the fixing holes (36). The top of the threaded post (39) is threaded with a threaded sleeve (37), and the bottom side of the threaded sleeve (37) abuts against the top side of the middle plate (46). Several circular grooves (17) are provided on the bottom side of the moving mold (10), and the threaded sleeve (37) and the threaded post (39) are disposed inside the circular grooves (17).

5. The induction structure of the fluororubber watchband injection molding production oil press according to claim 1, characterized in that: The injection assembly includes a sprue (18), which is located in the middle of the bottom side of the moving mold (10). The bottom side of the moving mold (10) is provided with several first grooves (15), and the top side of the fixed mold (13) is provided with several second grooves (32). The top sides of the second grooves (32) all penetrate the middle plate (46). The first groove (15) is located directly above the second groove (32). The middle plate (46) is provided with an injection runner (40). The second grooves (32) are all connected to the injection runner (40). The sprue (18) is connected to the injection runner (40).

6. The induction structure of the fluororubber watchband injection molding production oil press according to claim 5, characterized in that: The ejector assembly includes an ejector plate (41). A mounting groove (44) is provided through the top side of the lower mold base (12). The ejector plate (41) is disposed inside the mounting groove (44). Several ejector rods (43) are fixedly connected to the top side of the ejector plate (41). Sliding grooves (33) are provided through the bottom sides of several grooves (32). The ejector rods (43) are slidably connected to the sliding grooves (33). The bottom of the ejector plate (41)... Limiting rods (45) are fixedly connected at the four corners of the side. Limiting tubes (47) are slidably sleeved on the four sets of limiting rods (45). The four sets of limiting tubes (47) are fixedly connected to the bottom inside the mounting groove (44). Springs (26) are sleeved on the four sets of limiting tubes (47). The top side of the springs (26) abuts against the bottom side of the lifting plate (41). A linkage mechanism is also provided between the moving mold (10) and the lifting plate (41).

7. The sensing structure of a hydraulic press for injection molding fluororubber watch straps according to claim 6, characterized in that: The linkage mechanism includes several linkage rods (42), all of which are fixedly connected to the top side of the lifting plate (41). Several sliding grooves (34) are provided through the fixed mold (13), and the linkage rods (42) slide through the sliding grooves (34). Several round holes (38) are provided through the middle plate (46), and the round holes (38) are fitted onto the linkage rods (42). The diameter of the round holes (38) is larger than the diameter of the sliding grooves (34). Several spring grooves (22) are provided on the top side of the moving mold (10). A sliding groove (23) is provided through the bottom side of the spring grooves (22), and a downward pressing mechanism slides through the sliding groove (23). The top of the rod (16) is fixedly connected to a sliding plate (25). The bottom side of the sliding plate (25) abuts against the bottom side of the inner spring groove (22). The spring groove (22) is provided with a spring (24). The upper and lower sides of the spring (24) abut against the bottom side of the upper mold base (9) and the top side of the sliding plate (25) respectively. The rod (16) is located directly above the linkage rod (42). The diameter of the rod (16) is larger than the diameter of the linkage rod (42). The bottom end of the rod (16) abuts against the top side of the fixed mold (13). The top end of the linkage rod (42) abuts against the bottom end of the rod (16).

8. The induction structure of the fluororubber watchband injection molding production oil press according to claim 1, characterized in that: Positioning rods (14) are fixedly connected to the four corners of the bottom side of the moving mold (10). Positioning grooves (31) are opened through the four corners between the fixed mold (13) and the middle plate (46). The positioning rods (14) are slidably inserted into the positioning grooves (31).

9. The induction structure of an oil press for fluoroelastomer watchband injection molding production according to claim 1, characterized in that: Several anti-slip strips (30) are fixedly connected to the left and right sides of the lower mold base (12).

10. The induction structure of an oil press for fluoroelastomer watchband injection molding production according to claim 1, characterized in that: A protective baffle (7) is fixedly installed on the top edge of the workbench (1), and a safety light curtain (8) is installed on the left and right sides of the front part of the protective baffle (7).

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