Bopp film double-stretching production line die preheating system

Abstract

The utility model relates to a kind of BOPP film double-stretching production line die preheating system, including support, the bottom four corners of the support are evenly installed with universal wheel, the side wall of the support is fixedly installed with handle, the top center of the support is provided with first through slot, the two sides of the first through slot are provided with mounting groove, further comprising: upper heat preservation box, movably installed in the top of the support, digital thermometer is installed in the upper heat preservation box, the outer wall of the upper heat preservation box is symmetrically installed with multiple handles. The utility model is through the setting of upper heat preservation box, lower heat preservation box, electric heating rod and digital thermometer, when using, the die placed on support frame can be preheated by multiple electric heating rods, so that it can be directly used after installation without waiting for its temperature rise, can effectively shorten overall downtime, improve production efficiency, while preheating, the temperature in the upper heat preservation box and lower heat preservation box can be directly observed by digital thermometer.

Description

Technical Field

[0001] This utility model relates to the field of die head preheating technology, and in particular to a die head preheating system for a BOPP film bi-stretching production line. Background Technology

[0002] BOPP stands for biaxially oriented polypropylene, which is a type of plastic film produced by stretching polypropylene molecules in both the longitudinal and transverse directions. BOPP film is widely used in packaging, labeling, and other applications due to its excellent transparency, high tensile strength, moisture resistance, and dimensional stability.

[0003] Due to process requirements, the existing BOPP biaxial stretching production line requires regular replacement and cleaning of the extrusion die. In the current process, replacing the die takes 3 hours, disassembling, cleaning and assembling the die takes 4 hours, heating the die takes 4 hours, and adjusting the die gap and feeding takes 2 hours, totaling about 15 hours before the machine can be ready for operation. In order to shorten the downtime, the production line is equipped with a spare die. However, even if the spare die is used to replace the die directly, it still requires more than 4 hours of heating process after installation, resulting in an overall downtime of about 9 hours.

[0004] To address the problem that the spare die head still needs to wait for heating after installation, which leads to a long overall downtime and affects production efficiency, this utility model proposes a new solution. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a preheating system for the die head of a BOPP film bi-stretching production line, which solves the problem that the spare die head still needs to wait for heating after installation, which leads to a long overall downtime and affects production efficiency.

[0006] The purpose of this utility model is achieved as follows: A preheating system for a BOPP film bi-stretching production line die head includes a bracket, with casters installed at all four corners of the bracket's bottom, handles fixedly installed on the side walls of the bracket, a first through groove at the center of the top of the bracket, and mounting grooves on both sides of the first through groove, and further includes: An upper insulated box is movably mounted on the top of the bracket. A digital display thermometer is installed through the upper insulated box, and multiple handles are symmetrically installed on the outer wall of the upper insulated box. The lower insulation box is fixedly installed on the bottom of the inner wall of the bracket, and multiple evenly distributed electric heating rods are installed inside both the upper insulation box and the lower insulation box. A bidirectional adjustment mechanism is installed inside one of the mounting slots. Support frames are installed on both moving ends of the bidirectional adjustment mechanism. A guide mechanism that cooperates with the support frame is provided inside the other mounting slot. A clamping mechanism for clamping the die head is movably installed on the support frame.

[0007] Furthermore, the bidirectional adjustment mechanism includes a first frame fixedly installed inside the mounting slot, a bidirectional lead screw rotatably installed on the inner side of the first frame, two sliders symmetrically installed on the bidirectional lead screw and respectively fixedly connected to the bottom ends of the two support frames, and a handwheel passing through the bracket is fixedly connected to one end of the bidirectional lead screw.

[0008] Furthermore, the guiding mechanism includes a second frame fixedly installed inside the mounting groove, a guide rod fixedly installed inside the second frame, and two support blocks slidably installed on the outer side of the guide rod, with the two support blocks respectively connected to the bottom ends of the two support frames.

[0009] Furthermore, the clamping mechanism includes two symmetrically arranged connecting rods, and two second through slots that cooperate with the connecting rods are symmetrically opened on the support frame. A crossbar that is rotatably connected to the support frame is fixedly connected to the outer wall of the connecting rod. A protrusion is provided at the top of one end of the connecting rod, and an mounting plate is installed at an angle at the end of the connecting rod away from the protrusion. A soft pad is fixedly connected to the inner side of the mounting plate.

[0010] Furthermore, hooks are fixedly connected to the bottom of both mounting plates, and springs are installed between the two hooks.

[0011] Furthermore, one end of the mounting plate is fixedly connected to an adjusting rod that is slidably connected to the connecting rod, and a bolt threadedly connected to the top of the second through groove is installed through the groove. The top of the adjusting rod is provided with multiple adjusting holes that cooperate with the bolt.

[0012] Furthermore, the digital display thermometer includes a display screen mounted on the outer wall of the upper insulation box, and a temperature sensor that cooperates with the digital display thermometer is installed inside the upper insulation box.

[0013] Compared with the prior art, the beneficial effects of this utility model are: (1) This utility model provides a preheating system for the die head of a BOPP film bi-stretching production line. With the setting of an upper heat preservation box, a lower heat preservation box, electric heating rods and digital display thermometers, the die head placed on the support frame can be preheated by multiple electric heating rods during use, so that it can be used directly after installation without waiting for it to heat up, which can effectively shorten the overall downtime and further improve production efficiency. While preheating, the temperature inside the upper and lower heat preservation boxes can be viewed intuitively by the digital display thermometer. After heating is completed, the upper and lower heat preservation boxes can also keep the die head warm, reduce its cooling speed, and effectively reduce the energy consumption of heating. (2) By setting up a bracket, casters and handle, this utility model can facilitate the movement of the mold during use, thereby making it easy to move the preheated mold head to the working area and to facilitate the hoisting and installation of the mold head; (3) With the setting of bidirectional adjustment mechanism and clamping mechanism, the bidirectional adjustment mechanism can adjust the position of the two support frames during use, so as to facilitate the adjustment of the support position of the two support frames according to the size of the mold head, ensuring the stable placement of the mold head. After the mold head is placed on the support frame, it can also be clamped and fixed by the clamping mechanism to ensure the stability of the mold head during preheating or movement, and prevent it from slipping or being damaged by bumps. Attached Figure Description

[0014] Figure 1 This is one of the overall structural schematic diagrams of this utility model.

[0015] Figure 2 This is the second schematic diagram of the overall structure of this utility model.

[0016] Figure 3 This is a schematic diagram of the support structure of this utility model.

[0017] Figure 4 This is a schematic diagram of the guide rod structure of this utility model.

[0018] Figure 5 This is a schematic diagram of the support frame structure of this utility model.

[0019] Figure 6 This is a schematic diagram of the internal structure of the upper insulation box of this utility model.

[0020] in: 1. Bracket; 2. Upper insulation box; 3. Lower insulation box; 4. Casters; 5. Handle; 6. Digital thermometer; 7. Lifting handle; 8. Handwheel; 9. Mounting slot; 10. Support frame; 11. Electric heating rod; 12. First through slot; 13. Guide rod; 14. Two-way lead screw; 15. Clamping mechanism; 16. Second through slot; 17. Connecting rod; 18. Protrusion; 19. Adjusting rod; 20. Mounting plate; 21. Hook; 22. Spring; 23. Crossbar; 24. Pad; 25. Bolt; 26. Adjustment hole; 27. Display screen; 28. Temperature sensor; 29. ​​Support block; 30. Slider; 31. First frame; 32. Second frame. Detailed Implementation

[0021] To better understand the technical solution of this utility model, a detailed description will be provided below in conjunction with relevant illustrations. It should be understood that the specific embodiments described below are not intended to limit the specific implementation of the technical solution of this utility model, but are merely possible implementations of the technical solution of this utility model. It should be noted that the descriptions of the positional relationships of the components herein, such as component A being located above component B, are based on the relative positions of the components in the illustrations and are not intended to limit the actual positional relationships of the components. Example

[0022] See Figure 1-6 , Figure 1 A schematic diagram of a die head preheating system for a BOPP film bi-stretching production line according to Embodiment 1 is shown. As shown, the die head preheating system for a BOPP film bi-stretching production line according to Embodiment 1 includes a bracket 1, with casters 4 installed at each of the four corners of the bottom of the bracket 1. Handles 5 are fixedly installed on the side walls of the bracket 1. A first through groove 12 is formed at the center of the top of the bracket 1, and mounting grooves 9 are provided on both sides of the first through groove 12. The system also includes: The upper insulation box 2 is movably installed on the top of the bracket 1. A digital display thermometer 6 is installed through the upper insulation box 2. Multiple handles 7 are symmetrically installed on the outer wall of the upper insulation box 2. The lower insulation box 3 is fixedly installed on the bottom of the inner wall of the bracket 1. Both the upper insulation box 2 and the lower insulation box 3 are equipped with multiple evenly distributed electric heating rods 11. With the arrangement of the upper insulation box 2, the lower insulation box 3, the electric heating rods 11, and the digital display thermometer 6, the multiple electric heating rods 11 can preheat the mold head placed on the support frame 10 during use, so that it can be used directly after installation without waiting for it to heat up, which can effectively shorten the overall downtime and further improve production efficiency. During preheating, the temperature inside the upper insulation box 2 and the lower insulation box 3 can be viewed intuitively through the digital display thermometer 6. After heating is completed, the upper insulation box 2 and the lower insulation box 3 can also keep the mold head warm, reduce its cooling rate, and effectively reduce the energy consumption of heating. With the arrangement of the bracket 1, casters 4, and handles 5, the mold can be moved easily during use, so that the preheated mold head can be moved to the working area for easy hoisting and installation. A bidirectional adjustment mechanism is installed inside one of the mounting slots 9. Support frames 10 are installed on both moving ends of the bidirectional adjustment mechanism. A guide mechanism that cooperates with the support frame 10 is provided inside the other mounting slot 9. A clamping mechanism 15 for clamping the mold head is movably installed on the support frame 10. With the bidirectional adjustment mechanism and the clamping mechanism 15, the position of the two support frames 10 can be adjusted during use, so as to facilitate the adjustment of the support position of the two support frames 10 according to the size of the mold head, ensuring the stable placement of the mold head. After the mold head is placed on the support frame 10, it can also be clamped and fixed by the clamping mechanism 15 to ensure the stability of the mold head during preheating or movement, and prevent it from slipping or being damaged by impact.

[0023] like Figure 3 and Figure 4 As shown, the bidirectional adjustment mechanism includes a first frame 31 fixedly installed inside the mounting slot 9. A bidirectional lead screw 14 is rotatably mounted on the inner side of the first frame 31. Two sliders 30 are symmetrically mounted on the bidirectional lead screw 14 and are respectively fixedly connected to the bottom ends of two support frames 10. A handwheel 8 is fixedly connected to one end of the bidirectional lead screw 14 through the bracket 1. It should be noted that during use, rotating the bidirectional lead screw 14 by the handwheel 8 can drive the two sliders 30 to move in opposite directions, thereby adjusting the distance between the two support frames 10, which facilitates adjusting the support position of the support frame 10 according to the size of the mold head.

[0024] like Figure 3 and Figure 4 As shown, the guiding mechanism includes a second frame 32 fixedly installed inside the mounting groove 9. A guide rod 13 is fixedly installed inside the second frame 32. Two support blocks 29 are slidably installed on the outer side of the guide rod 13, and the two support blocks 29 are respectively connected to the bottom ends of the two support frames 10. It should be noted that when the support frame 10 moves, the support blocks 29 connected to its bottom can slide on the guide rod 13, thereby guiding the support frame 10 and ensuring the stability of the support frame 10 when it moves.

[0025] like Figure 3 , Figure 4 and Figure 5As shown, the clamping mechanism 15 includes two symmetrically arranged connecting rods 17. The support frame 10 has two symmetrically arranged second through slots 16 that cooperate with the connecting rods 17. A crossbar 23, rotatably connected to the support frame 10, is fixedly connected to the outer wall of the connecting rod 17. A protrusion 18 is provided at the top of one end of the connecting rod 17. An mounting plate 20 is obliquely installed at the end of the connecting rod 17 away from the protrusion 18. Soft pads 24 are fixedly connected to the inner side of the mounting plate 20. It should be noted that when the mold head is placed on the support frame 10, the bottom of the mold head presses against the protrusion 18 protruding from the second through slot 16. At this time, the connecting rod 17 rotates around the crossbar 23. As the connecting rod 17 rotates, the two pads 24 located on both sides of the mold head rotate synchronously, thereby clamping the mold head against the two side walls and fixing the mold head to the top of the support frame 10. In use, the mold head's own weight is sufficient for fixation, eliminating the need for manual fixing, making it simpler and more convenient to use.

[0026] like Figure 5 As shown, hooks 21 are fixedly connected to the bottom of both mounting plates 20, and a spring 22 is installed between the two hooks 21. It should be noted that the hooks 21 facilitate the installation of the spring 22. When the two pads 24 rotate toward the mold head, the mounting plates 20 will pull the spring 22 apart through the hooks 21. When the mold head is lifted from the top of the support frame 10, the spring 22 will pull the two mounting plates 20 simultaneously with its own elasticity, causing the pads 24 to rotate away from the mold head, so that they are disengaged from the mold head and do not affect the lifting of the mold head.

[0027] like Figure 5 As shown, in a preferred embodiment, one end of the mounting plate 20 is fixedly connected to an adjusting rod 19 that is slidably connected to the connecting rod 17. A bolt 25 threadedly connected to the top of the second through groove 16 is installed through it. The top of the adjusting rod 19 has multiple adjusting holes 26 that cooperate with the bolts 25. It should be noted that during use, the distance between the two pads 24 can be adjusted by moving the two adjusting rods 19, thus facilitating the clamping of mold heads of different sizes. After adjustment, the bolts 25 can be screwed into the corresponding adjusting holes 26 to fix the connecting rod 17 and the adjusting rod 19.

[0028] like Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, the digital thermometer 6 includes a display screen 27 mounted on the outer wall of the upper insulation box 2, and a temperature sensor 28 that cooperates with the digital thermometer 6 is installed inside the upper insulation box 2. It should be noted that the display screen 27 and the temperature sensor 28 can be connected via wires or wirelessly. In use, the temperature sensor 28 can monitor the temperature inside the insulation box, and the display screen 27 can display the real-time temperature.

[0029] Working principle: This utility model provides a preheating system for the die head of a BOPP film biaxial stretching production line. During use, rotating the bidirectional lead screw 14 via the handwheel 8 drives two sliders 30 to move in opposite directions. The distance between the two support frames 10 is adjusted according to the size of the die head. After adjustment, the die head is placed on the support frame 10. When the die head is placed on the support frame 10, the bottom of the die head presses against the protrusion 18 protruding from the second through groove 16. At this time, the connecting rod 17 rotates around the crossbar 23. As the connecting rod 17 rotates, the two pads 24 located on both sides of the die head rotate synchronously, clamping the two side walls of the die head and fixing it to the top of the support frame 10. When the two pads 24 rotate towards the die head, the mounting plate 20 moves through the hook 21... Pull the spring 22 open, then cover the upper insulation box 2 on the outside of the mold head and start the electric heating rod 11 to preheat the mold head. During preheating, the real-time temperature can be viewed through the display screen 27 and the temperature sensor 28. When the required temperature is reached, heating can be paused and the mold head can be kept warm by the upper insulation box 2 and the lower insulation box 3. When the mold head needs to be installed, push the bracket 1 with the handle 5 and the universal wheel 4 to move the mold head to the working area. Then open the upper insulation box 2 with the handle 7. At this time, the mold head can be lifted and installed. When the mold head is lifted from the top of the support frame 10, the spring 22 will pull the two mounting plates 20 at the same time through its own elasticity, so that the two pads 24 rotate away from the mold head and detach from the mold head to avoid affecting the lifting of the mold head.

[0030] The above are merely specific application examples of this utility model and do not constitute any limitation on the scope of protection of this utility model. All technical solutions formed by equivalent transformations or equivalent substitutions fall within the scope of protection of this utility model.

Claims

1. A preheating system for the die head of a BOPP film bi-stretching production line, characterized in that: The bracket (1) is characterized in that casters (4) are installed at the four corners of the bottom of the bracket (1), handles (5) are fixedly installed on the side walls of the bracket (1), a first through groove (12) is provided at the center of the top of the bracket (1), and mounting grooves (9) are provided on both sides of the first through groove (12). The bracket also includes: The upper insulation box (2) is movably installed on the top of the bracket (1). A digital display thermometer (6) is installed through the upper insulation box (2). Multiple handles (7) are symmetrically installed on the outer wall of the upper insulation box (2). The lower insulation box (3) is fixedly installed on the bottom of the inner wall of the bracket (1). Both the upper insulation box (2) and the lower insulation box (3) are equipped with multiple evenly distributed electric heating rods (11). A bidirectional adjustment mechanism is installed inside one of the mounting slots (9). Both moving ends of the bidirectional adjustment mechanism are equipped with support frames (10). The other mounting slot (9) is equipped with a guide mechanism that cooperates with the support frame (10). A clamping mechanism (15) for clamping the mold head is movably installed on the support frame (10).

2. The BOPP film bi-stretching production line die head preheating system according to claim 1, characterized in that: The bidirectional adjustment mechanism includes a first frame (31) fixedly installed inside the mounting slot (9). A bidirectional lead screw (14) is rotatably installed on the inner side of the first frame (31). Two sliders (30) are symmetrically installed on the bidirectional lead screw (14) and are respectively fixedly connected to the bottom ends of the two support frames (10). A handwheel (8) that passes through the bracket (1) is fixedly connected to one end of the bidirectional lead screw (14).

3. The BOPP film bi-stretching production line die head preheating system according to claim 1, characterized in that: The guiding mechanism includes a second frame (32) fixedly installed inside the mounting groove (9). A guide rod (13) is fixedly installed inside the second frame (32). Two support blocks (29) are slidably installed on the outside of the guide rod (13). The two support blocks (29) are respectively connected to the bottom ends of the two support frames (10).

4. The BOPP film bi-stretching production line die head preheating system according to claim 1, characterized in that: The clamping mechanism (15) includes two symmetrically arranged connecting rods (17). The support frame (10) has two symmetrically arranged second through slots (16) that cooperate with the connecting rods (17). The outer wall of the connecting rod (17) is fixedly connected to a crossbar (23) that is rotatably connected to the support frame (10). A protrusion (18) is provided at the top of one end of the connecting rod (17). An installation plate (20) is installed at an angle at the end of the connecting rod (17) away from the protrusion (18). A soft pad (24) is fixedly connected to the inner side of the installation plate (20).

5. The BOPP film bi-stretching production line die head preheating system according to claim 4, characterized in that: Both mounting plates (20) are fixedly connected to hooks (21) at their bottoms, and a spring (22) is installed between the two hooks (21).

6. The BOPP film bi-stretching production line die head preheating system according to claim 4, characterized in that: One end of the mounting plate (20) is fixedly connected to an adjusting rod (19) that is slidably connected to the connecting rod (17). The top of the second through groove (16) is threadedly connected to a bolt (25). The top of the adjusting rod (19) is provided with a plurality of adjusting holes (26) that cooperate with the bolt (25).

7. The BOPP film bi-stretching production line die head preheating system according to claim 1, characterized in that: The digital thermometer (6) includes a display screen (27) installed on the outer wall of the upper insulation box (2), and a temperature sensor (28) that cooperates with the digital thermometer (6) is installed inside the upper insulation box (2).

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