A packaging tape manufacturing extrusion mechanism

Abstract

The utility model provides a kind of packing tape manufacturing extrusion mechanism, including rack, the rack is fixedly installed with extrusion cylinder, screw rod is movably installed in the extrusion cylinder, feed hopper and thermostatic heating device are fixedly installed outside the extrusion cylinder, the one end of the extrusion cylinder is fixedly installed with extrusion head, extrusion head is fixedly installed with preheating device, extrusion head is equipped with first probe hole, first probe hole is fixedly installed with first thermocouple, extrusion cylinder is equipped with second probe hole, second probe hole is fixedly installed with second thermocouple, rack is fixedly installed with waste box, extrusion cylinder is fixedly installed with pressure regulating mechanism, and pressure regulating mechanism includes pressure detection unit and control valve, control valve is fixedly connected with copper pipe, copper pipe one end is connected with waste box, rack is fixedly installed with driving motor and speed reducer, and driving motor is driven connection screw rod by speed reducer.

Description

Technical Field

[0001] This utility model belongs to the field of packing strap production technology, specifically relating to a packing strap manufacturing extrusion mechanism. Background Technology

[0002] PP strapping (polypropylene strapping) and PET strapping (plastic steel strapping) are two mainstream environmentally friendly plastic strapping products on the market. These two types of strapping use polypropylene and PET polyester as raw materials respectively, and have different load-bearing capacities to meet the packing needs of objects of varying weights. In terms of product characteristics, both types of strapping exhibit excellent performance characteristics: they not only possess good plasticity and bending resistance, but also have strong tensile strength. At the same time, their lightweight and bright colors, coupled with a convenient user experience, make them ideal choices for the packaging industry. In terms of manufacturing process, these strappings are made by extruding thermoplastic plastics and then performing a longitudinal stretching process. This special manufacturing process gives the strapping good elasticity, making it easy and efficient to handle during strapping operations. Due to these significant advantages, PP and PET strapping have become the dominant products in the current strapping market.

[0003] The extrusion head of existing extrusion equipment lacks a preheating device, so the temperature of the extrusion head only reaches the working temperature after a certain length of PP packing tape has been extruded, resulting in material waste.

[0004] Chinese utility model patent CN220883309U discloses a strapping tape manufacturing extrusion mechanism, relating to the field of strapping tape manufacturing technology. This strapping tape manufacturing extrusion mechanism includes an L-shaped base, a disassembly component, and auxiliary components. An outer cylinder is fixedly mounted on the top of the L-shaped base, and an extrusion head is disposed on one side of the outer cylinder. A feed hopper is fixedly mounted on the top of the outer cylinder. The disassembly component is disposed on the outer cylinder and includes a fixing frame, a locking block, a pull rod, and a locking groove. The locking block is disposed inside the fixing frame, and a pull rod is fixedly mounted on one side of the locking block. A locking groove is opened on one side of the extrusion head, and the pull rod is engaged and installed inside the locking groove. The auxiliary components are disposed on the feed hopper. The disassembly component allows for easier cleaning of the internal structure of the extrusion head, which is crucial to prevent clogging and impurity accumulation. Disassembling and replacing the extrusion head allows for quick and convenient adjustment of the product's shape, size, color, and other specifications. However, due to the lack of a preheating device, the extrusion head only reaches its operating temperature after a certain length of PP strapping tape has been extruded, leading to material waste. Utility Model Content

[0005] The purpose of this invention is to provide a strapping extrusion mechanism to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a strapping manufacturing extrusion mechanism, comprising a frame, an extrusion cylinder fixedly mounted on the frame, a screw movably mounted inside the extrusion cylinder, a feed hopper and a constant temperature heating device fixedly mounted on the outside of the extrusion cylinder, an extrusion head fixedly mounted at one end of the extrusion cylinder, a preheating device fixedly mounted on the extrusion head, a first probe hole with a first thermocouple fixedly mounted therein, a second probe hole with a second thermocouple fixedly mounted therein, a waste bin fixedly mounted on the frame, a pressure regulating mechanism fixedly mounted on the extrusion cylinder, the pressure regulating mechanism comprising a pressure detection unit and a control valve, a copper pipe fixedly connected to the control valve, one end of the copper pipe being connected to the waste bin, and a drive motor and a reducer fixedly mounted on the frame, the drive motor driving the screw via the reducer.

[0007] Preferably, the feed hopper is fixed with a discharge pipe and a material quantity observation window, and the discharge pipe is fixedly equipped with a manual valve.

[0008] Preferably, the connection between the extrusion cylinder and the extrusion head is provided with an assembly groove, and a perforated plate is fixedly installed in the assembly groove.

[0009] Preferably, the frame is fixedly equipped with a controller, the controller is fixedly equipped with a control panel, and the control panel is fixedly equipped with buttons and a display screen.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] The present invention has an extrusion head fixedly installed at one end of the extrusion cylinder, and a preheating device fixedly installed on the extrusion head. The extrusion head is provided with a first probe hole, and a first thermocouple is fixedly installed in the first probe hole. During production and processing, the preheating device heats the extrusion head, and the first thermocouple detects whether the temperature of the extrusion head has reached a stable working state, ensuring that the temperature of the PP material is stable when it is extruded to the extrusion head, preventing the PP packing tape from not forming due to the low temperature of the extrusion head, and reducing material waste. Attached Figure Description

[0012] Figure 1 This is the first perspective structural view of this utility model.

[0013] Figure 2 This is the second perspective structural view of this utility model.

[0014] Figure 3 This is a structural view of the extrusion cylinder of this utility model.

[0015] Figure 4 This is a utility model Figure 3 Mark A is an enlarged structural view.

[0016] Figure 5 This is a utility model Figure 3 Mark B is an enlarged view of the structure.

[0017] The diagram shows: 1. Frame; 2. Extrusion cylinder; 3. Screw; 4. Feed hopper; 5. Constant temperature heating device; 6. Extrusion head; 7. Preheating device; 8. First probe hole; 9. First thermocouple; 10. Second probe hole; 11. Second thermocouple; 12. Waste bin; 13. Pressure regulating mechanism; 14. Pressure detection unit; 15. Control valve; 16. Copper pipe; 17. Drive motor; 18. Reducer; 19. Discharge pipe; 20. Material quantity observation window; 21. Manual valve; 22. Assembly slot; 23. Perforated plate; 24. Controller; 25. Control panel; 26. Button; 27. Display screen. Detailed Implementation

[0018] 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.

[0019] Example 1:

[0020] This utility model provides a strapping manufacturing extrusion mechanism, including a frame 1, an extrusion cylinder 2 fixedly mounted on the frame 1, a screw 3 movably mounted inside the extrusion cylinder 2, a feed hopper 4 and a constant temperature heating device 5 fixedly mounted on the outside of the extrusion cylinder 2, an extrusion head 6 fixedly mounted at one end of the extrusion cylinder 2, a preheating device 7 fixedly mounted on the extrusion head 6, a first probe hole 8 with a first thermocouple 9 fixedly mounted on the first probe hole 8, a second probe hole 10 with a second thermocouple 11 fixedly mounted on the extrusion cylinder 2, a waste bin 12 fixedly mounted on the frame 1, a pressure regulating mechanism 13 fixedly mounted on the extrusion cylinder 2, the pressure regulating mechanism 13 including a pressure detection unit 14 and a control valve 15, a copper pipe 16 fixedly connected to the control valve 15, one end of the copper pipe 16 connected to the waste bin 12, a drive motor 17 and a reducer 18 fixedly mounted on the frame 1, the drive motor 17 driving the connected screw 3 through the reducer 18. The feed hopper 4 is fixedly equipped with a discharge pipe 19 and a material quantity observation window 20. A manual valve 21 is fixedly installed on the discharge pipe 19. An assembly groove 22 is provided at the connection between the extrusion cylinder 2 and the extrusion head 6. A perforated plate 23 is fixedly installed on the assembly groove 22. A controller 24 is fixedly installed on the frame 1. A control panel 25 is fixedly installed on the controller 24. A button 26 and a display screen 27 are fixedly installed on the control panel 25.

[0021] Through the above technical solution, one end of the extrusion cylinder 2 of this utility model is fixedly installed with an extrusion head 6, and a preheating device 7 is fixedly installed on the extrusion head 6. The extrusion head 6 is provided with a first probe hole 8, and a first thermocouple 9 is fixedly installed in the first probe hole 8. During production and processing, the preheating device 7 heats the extrusion head 6, and the first thermocouple 9 detects whether the temperature of the extrusion head 6 has reached a stable working temperature, ensuring that the temperature of the PP material is stable when it is extruded to the extrusion head 6, preventing the PP packing tape from not forming due to the low temperature of the extrusion head 6, and reducing material waste.

[0022] Example 2:

[0023] In this embodiment, a horizontally arranged extrusion cylinder 2 is fixedly mounted on the frame 1. A helical screw 3 is installed inside the extrusion cylinder 2, and the screw 3 rotates within the extrusion cylinder 2 via a bearing assembly. A feed hopper 4 is fixedly connected to the upper outer side of the extrusion cylinder 2 for feeding plastic raw material granules into the extrusion cylinder 2. A constant temperature heating device 5 is also installed on the outer wall of the extrusion cylinder 2, and this constant temperature heating device 5 uses the principle of electric heating.

[0024] An extrusion head 6 is fixedly connected to the front end of the extrusion cylinder 2. The extrusion head 6 is made of a high-temperature resistant alloy material. A preheating device 7, which is an electric heating strip, is installed on the outer surface of the extrusion head 6 and is evenly wound around the outer wall of the extrusion head 6. A first probe hole 8 is provided on the side wall of the extrusion head 6, and a first thermocouple 9 is installed in the hole for real-time monitoring of the working temperature of the extrusion head 6. A second probe hole 10 is provided in the middle of the extrusion cylinder 2, and a second thermocouple 11 is also installed therein for detecting the internal temperature of the extrusion cylinder 2.

[0025] A waste bin 12 is fixedly installed at the bottom of the frame 1 to collect waste materials from the production process. A pressure regulating mechanism 13 installed on the extrusion cylinder 2 includes a pressure sensor and an electromagnetic control valve 15. The pressure sensor is installed at the end of the extrusion cylinder 2 to monitor internal pressure changes in real time. The electromagnetic control valve 15 is connected to the waste bin 12 via a copper pipe 16. When excessive pressure is detected, the control valve 15 automatically opens to release pressure, ensuring stable extrusion pressure.

[0026] The drive system consists of a drive motor 17 and a reducer 18. The drive motor 17 is connected to the reducer 18 via a coupling, and the output shaft of the reducer 18 directly drives the screw 3 to rotate. The reducer 18 adopts a gear reduction structure, which can adjust the speed of the screw 3 according to different raw materials. The entire system is automated through a PLC control system, and the signals from all sensors are centrally transmitted to the control panel 25, allowing operators to monitor and adjust process parameters in real time.

[0027] During operation, plastic granules enter the extrusion cylinder 2 from the feed hopper 4. The rotating screw 3 propels the material forward and melts it. The constant temperature heating device 5 maintains a stable temperature in the extrusion cylinder 2, and the molten material is extruded through the extrusion head 6 to form the final shape. The preheating device 7 ensures that the temperature of the extrusion head 6 quickly reaches the working temperature, and the first thermocouple 9 provides real-time temperature feedback. The pressure regulating mechanism 13 automatically adjusts the internal pressure to ensure uniform extrusion speed. The drive motor 17 provides stable power through the reducer 18 to ensure a constant screw speed.

[0028] This mechanism achieves high-quality continuous production of strapping through precise temperature control and pressure regulation. The preheating device 7 quickly brings the extruder head 6 to operating temperature, avoiding the problem of preheating extruded waste material required in traditional equipment. The dual thermocouple design enables independent monitoring of the temperatures of the extrusion cylinder 2 and the extruder head 6, ensuring precise temperature control at each stage. The pressure regulation mechanism 13 effectively solves the problem of strapping deformation caused by extrusion pressure fluctuations, improving product dimensional stability.

[0029] Example 3:

[0030] In this embodiment, the feed hopper 4 is made of metal and has an open top for easy material addition. A transparent material level observation window 20 is embedded in one side wall of the feed hopper 4. The observation window 20 is rectangular and its edges are fixedly connected to the wall of the feed hopper 4 via sealing strips. The inner and outer surfaces of the observation window 20 are polished to ensure clear observation. The bottom of the feed hopper 4 is inclined, and a discharge pipe 19 is connected to its lowest point. This discharge pipe 19 is made of the same metal as the feed hopper 4 and is fixedly connected to the feed hopper 4 by welding. The diameter of the discharge pipe 19 is slightly smaller than the bottom opening of the feed hopper 4, and a manual valve 21 is installed at its end. This manual valve 21 has a rotary structure; the discharge pipe 19 is opened or closed by rotating the valve stem clockwise or counterclockwise.

[0031] Under normal operating conditions, manual valve 21 remains closed, and material enters the extrusion cylinder 2 through the feed hopper 4. Operators can monitor the remaining material level in the feed hopper 4 in real time through the material level observation window 20. When the material level falls below the lower edge of the observation window, operators can replenish the material promptly to ensure continuous production. The design of the material level observation window 20 avoids the inconvenience of frequently opening the feed hopper 4 cover to check the material level, while also reducing the risk of external impurities entering the feeding system.

[0032] When maintenance or material changes are required, the operator can rotate and open the manual valve 21 to allow residual material in the feed hopper 4 to be discharged through the discharge pipe 19. The inclined angle design of the discharge pipe 19 ensures complete material discharge, avoiding cross-contamination caused by material residue. A temporary collection container can be connected to the end of the discharge pipe 19 for easy material recovery or disposal. The closed state of the manual valve 21 provides a good seal, preventing material leakage during production.

[0033] In this embodiment, a transition structure is provided at the connection between the feed hopper 4 and the extrusion cylinder 2 to ensure that the material can smoothly enter the extrusion cylinder 2 from the feed hopper 4. The position of the discharge pipe 19 is optimized so as not to affect the normal feeding function and to quickly discharge the material when needed. The installation position of the material quantity observation window 20 is ergonomically designed so that the operator can clearly observe the material quantity from different angles. The entire feeding system has a simple and reliable structure, is easy to maintain, and effectively improves production efficiency and reduces material waste.

[0034] Example 4:

[0035] The extrusion cylinder 2 and the extrusion head 6 of this application are provided with an assembly groove 22, which is an annular groove structure. A perforated plate 23 is fixedly installed in the assembly groove 22. The perforated plate 23 is made of stainless steel and has a circular flat plate structure. Its outer edge is provided with mounting holes corresponding to the threaded holes of the assembly groove 22, and a rigid connection with the extrusion cylinder 2 is achieved by high-strength bolts.

[0036] The working surface of the perforated plate 23 forms a smooth transition with the inner wall of the extrusion cylinder 2, and its surface is distributed with filter holes arranged in a honeycomb pattern. The diameter of the holes is designed to be 1.2-1.5 times the maximum particle diameter of the molten material, which can effectively intercept incompletely melted raw material particles without causing excessive resistance to the flow of the melt. The thickness of the perforated plate 23 is optimized according to the material properties, ensuring structural strength while having an appropriate porosity, so that the melt can pass through uniformly.

[0037] During operation, the molten material delivered from the screw 3 of the extrusion cylinder 2 first contacts the inflow surface of the perforated plate 23. The fully molten material passes smoothly through the filter holes under the thrust of the screw 3, while incompletely molten solid particles are trapped on the surface of the perforated plate 23. As the extrusion process continues, the trapped solid particles gradually melt under high temperature and pressure, eventually reaching a molten state that allows them to pass through the pores. The temperature of the perforated plate 23 is kept essentially the same as that of the extrusion cylinder 2 through heat conduction, preventing localized cooling of the material due to temperature differences.

[0038] Example 5:

[0039] In this embodiment, a controller 24 is fixedly mounted on the frame 1. A control panel 25 is fixedly mounted on the controller 24 of the constant temperature heating device 5. The control panel 25 includes buttons 26 and a display screen 27. The controller 24 is connected via electrical wiring to the drive motor 17, reducer 18, constant temperature heating device 5, preheating device 7, first thermocouple 9, second thermocouple 11, and pressure regulating mechanism 13, enabling centralized control of the extrusion process. The control panel 25 is waterproof and dustproof. Its buttons 26 include a start button 26, a stop button 26, a temperature adjustment button 26, and a pressure adjustment button 26. The display screen 27 uses liquid crystal display technology to display the real-time temperature of the extruder head 6, the temperature of the extrusion cylinder 2, and the pressure value inside the extrusion cylinder 2.

[0040] In practice, operators set the required operating parameters using buttons 26 on the control panel 25. When the start button 26 is pressed, the controller 24 first activates the constant temperature heating device 5 to preheat the extrusion cylinder 2, and simultaneously activates the preheating device 7 on the extruder head 6. The first thermocouple 9 and the second thermocouple 11 monitor the temperatures of the extruder head 6 and the extrusion cylinder 2 in real time and feed the temperature signals back to the controller 24. When the temperature reaches the preset value, the controller 24 starts the drive motor 17, which drives the screw 3 to rotate through the reducer 18, thus initiating the extrusion operation. The display screen 27 simultaneously displays the current temperature and pressure values, facilitating operator monitoring of the production process.

[0041] The pressure detection unit 14 in the pressure regulating mechanism 13 continuously monitors the pressure changes inside the extrusion cylinder 2. When the pressure exceeds the set threshold, the controller 24 automatically opens the control valve 15, discharging excess material into the waste bin 12 through the copper pipe 16, thereby maintaining a stable extrusion pressure. This pressure regulating mechanism effectively avoids uneven thickness or deformation of the strapping caused by pressure fluctuations. Operators can fine-tune the pressure setting value using the pressure regulating button 26 to adapt to the production needs of strapping materials of different types.

[0042] During the extrusion process, if abnormal temperature or pressure occurs, the controller 24 will issue an alarm via the display screen 27 and automatically take corresponding adjustment measures according to the preset program. For example, when the temperature of the extruder head 6 is too low, the controller 24 will increase the power of the preheating device 7; when the temperature of the extrusion cylinder 2 is too high, it will reduce the output of the constant temperature heating device 5. This closed-loop control system ensures the stability and reliability of the production process.

[0043] The control panel 25 also features a parameter storage function, allowing the optimal process parameters for different strapping materials to be stored in the controller 24. When switching production of strapping materials, operators can quickly adjust the equipment simply by retrieving the corresponding parameter settings, significantly improving production efficiency. The display screen 27 also has a historical data query function, allowing for the tracing of past production records and providing data support for quality analysis and process improvement.

[0044] This embodiment achieves precise control of the packing tape extrusion process through an integrated control system. The controller 24, together with various actuators and detection elements, forms a complete closed-loop control system, ensuring that key parameters such as extrusion temperature and pressure are always maintained within their optimal operating range. The human-machine interface of the control panel 25 is designed to be simple and clear, facilitating real-time monitoring of equipment operation and enabling quick parameter adjustments, effectively improving production efficiency and product quality stability.

[0045] 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0046] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A strapping manufacturing extrusion mechanism, comprising a frame, an extrusion cylinder fixedly mounted on the frame, a screw movably mounted inside the extrusion cylinder, a feed hopper and a constant temperature heating device fixedly mounted on the outside of the extrusion cylinder, and an extrusion head fixedly mounted at one end of the extrusion cylinder, characterized in that, The extrusion head is fixedly equipped with a preheating device. The extrusion head has a first probe hole, and a first thermocouple is fixedly installed in the first probe hole. The extrusion cylinder has a second probe hole, and a second thermocouple is fixedly installed in the second probe hole. A waste bin is fixedly installed on the frame. A pressure regulating mechanism is fixedly installed on the extrusion cylinder. The pressure regulating mechanism includes a pressure detection unit and a control valve. A copper pipe is fixedly connected to the control valve. One end of the copper pipe is connected to the waste bin. A drive motor and a reducer are fixedly installed on the frame. The drive motor drives the screw through the reducer.

2. The packing strap manufacturing extrusion mechanism according to claim 1, characterized in that, The feed hopper is fixed with a discharge pipe and a material quantity observation window, and the discharge pipe is fixedly equipped with a manual valve.

3. The packing strap manufacturing extrusion mechanism according to claim 1, characterized in that, An assembly groove is provided at the connection between the extrusion cylinder and the extrusion head, and a perforated plate is fixedly installed in the assembly groove.

4. The packing strap manufacturing extrusion mechanism according to claim 1, characterized in that, The frame is fixedly equipped with a controller, the controller is fixedly equipped with a control panel, and the control panel is fixedly equipped with buttons and a display screen.

Images