An underwear heat press

Abstract

The utility model discloses an underwear hot press, include: the placement board is used for holding underwear blank, cylinder is set in the placement board top, the pressing plate is connected with cylinder piston rod, and the up and down movement is driven under cylinder, the connecting plate is rigidly fixed with the pressing plate, and the sliding frame is connected with the connecting plate, and the linear reciprocating motion is made with the connecting plate, the sliding block is installed on the sliding frame, has side slope and top plane, the compression spring is set between the sliding block and sliding frame, the rim of drive wheel is equipped with the wedge, the wedge can contact with the side slope or top plane of sliding block, the gear is coaxially fixed with drive wheel, the rack is connected with the placement board and is engaged with gear. This underwear hot press has the characteristics of simple structure, automatic coordination of hot pressing and discharge, high reliability and low maintenance cost.

Description

Technical Field

[0001] This utility model relates to an underwear heat press machine. Background Technology

[0002] Thermoforming technology for underwear is an important process in modern underwear production. It involves applying pressure and heat to underwear fabric to create specific shapes and structures that meet ergonomic and aesthetic requirements. With the development of the underwear manufacturing industry, thermoforming equipment is constantly being improved to increase production efficiency, product quality, and reduce production costs.

[0003] Currently, underwear heat presses on the market are mainly divided into the following categories: manual heat presses, pneumatic heat presses, and hydraulic heat presses. Regardless of the type of heat press, its main working process includes three steps: feeding, heat pressing, and discharging. Among these, the design of the discharging stage directly affects production efficiency, product quality, and equipment reliability.

[0004] The discharge methods of traditional underwear hot press machines mainly include the following:

[0005] The first method is manual material removal. After hot pressing, the operator manually pulls the placement plate or molded product out of the hot pressing zone. This method is simple and direct, but it suffers from low efficiency, high labor costs, and is prone to product deformation and inconsistency. Especially in high-temperature environments, operators are prone to fatigue due to prolonged repetitive work, affecting production quality and efficiency.

[0006] The second method is independent pusher cylinder discharge. An additional cylinder or motor is installed on the hot press specifically to push the placement plate for discharge. While this method achieves automated discharge, it has disadvantages such as complex structure, increased cost, and heavy maintenance workload. More importantly, the independent pusher cylinder needs to be coordinated with the hot press cylinder in a specific time sequence. Improper timing control may lead to premature discharge before the hot pressing is complete, causing product quality problems and equipment damage.

[0007] The third type is conveyor belt discharge. This combines a hot press with a conveyor belt to achieve continuous discharge. This method is suitable for mass production, but the system is highly complex, requiring strict control systems and mechanical precision, resulting in high initial investment and maintenance costs. Furthermore, conveyor belt systems are prone to aging in high-temperature environments, necessitating frequent component replacements.

[0008] All of the above discharge methods have some common problems in practical applications:

[0009] Timing interference problem: The independent discharge mechanism needs to be precisely coordinated with the hot pressing mechanism. If the coordination is not proper, it may cause the discharge to start before the hot pressing is completed, or the discharge to be delayed after the hot pressing is completed, which will affect product quality and production efficiency.

[0010] Structural complexity issues: The additional discharge mechanism increases the complexity of the equipment, which not only increases the cost of the equipment, but also increases the potential for failure and the difficulty of maintenance.

[0011] Control system dependency issues: Most automatic material handling systems rely on electrical controls and sensors. Under harsh conditions such as high temperature and dust, these components are prone to failure, reducing the reliability of the equipment.

[0012] Workpiece stability is crucial to product quality during hot pressing. An independent unloading mechanism may cause minor disturbances to the workpiece during hot pressing, affecting the pressing effect.

[0013] Low energy efficiency: The independent discharge mechanism requires additional energy input, which increases energy consumption and operating costs.

[0014] Therefore, the underwear hot press industry urgently needs a new type of discharge mechanism that can solve the above problems. Utility Model Content

[0015] The purpose of this invention is to provide a hot press machine for underwear. This hot press machine for underwear features a simple structure, automatic coordination of hot pressing and material discharge, high reliability, and low maintenance cost.

[0016] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0017] A hot press for underwear includes: a placement plate for holding underwear blanks; a cylinder disposed above the placement plate; a pressure plate connected to the piston rod of the cylinder and moving up and down under the drive of the cylinder; a connecting plate rigidly fixed to the pressure plate; a sliding frame connected to the connecting plate and reciprocating linearly with the connecting plate; a slider mounted on the sliding frame and having a side inclined surface and a top plane; a compression spring disposed between the slider and the sliding frame; a drive wheel with a wedge on its rim, the wedge contacting the side inclined surface or the top plane of the slider; a gear coaxially fixed to the drive wheel; and a rack meshing with the gear and connected to the placement plate.

[0018] The present invention is further configured such that when the pressure plate moves downward, the side slope of the slider contacts and passes over the wedge, and the drive wheel does not rotate.

[0019] The present invention is further configured such that when the pressure plate moves upward, the top plane of the slider abuts against the wedge, causing the drive wheel to rotate, and the gear rotates accordingly, driving the rack to push the placement plate outward.

[0020] The present invention is further configured such that the angle between the inclined surface of the slider and the horizontal plane is 30°-60°.

[0021] The present invention is further configured such that the elastic coefficient of the compression spring is 2-5 N / mm.

[0022] The present invention is further configured such that the module of the gear and the rack is 1.5-3mm.

[0023] In summary, this utility model has the following beneficial effects:

[0024] Automatic coordination of hot pressing and unloading: A slider-wedge unidirectional drive mechanism enables a silent drive chain during the hot pressing down phase and automatic unloading during the return phase. This setup ensures absolute stability of the workpiece position during hot pressing and automatically triggers unloading upon completion, eliminating the need for an additional timing control system. Compared to traditional independent unloading mechanisms, this setup eliminates the risk of timing interference, improves the edge clarity and indentation consistency of the hot-pressed product, and reduces fabric damage caused by high-temperature delays.

[0025] Simplified Structure and Reduced Cost: This invention uses a single cylinder to simultaneously perform both hot pressing and discharging functions, eliminating the need for separate discharging cylinders / motors, controllers, and sensors found in traditional solutions. This single-source, dual-function design significantly simplifies the equipment structure, reduces the number of parts, and lowers manufacturing costs.

[0026] Improved reliability and simplified maintenance: This invention achieves time-adaptive operation of the hot pressing and discharge processes through mechanical structure, without relying on electrical control systems and sensors.

[0027] Improved production efficiency: The automatic return discharge setting eliminates the time required for manual or separate control of the discharge mechanism in traditional solutions, and controls the delay for each hot pressing cycle.

[0028] Flexible parameter adjustment: By adjusting the gear module, number of teeth, and gear diameter, the discharge stroke and speed can be set to adapt to different sizes of underwear products and worktables. The settings of the slider side slope angle (30°-60°) and compression spring elastic coefficient (2-5N / mm) enable the equipment to operate stably under different working conditions, improving the adaptability and versatility of the equipment. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the embodiment;

[0030] Figure 2 This is a schematic diagram of the rear view structure of an embodiment;

[0031] Figure 3 This is a schematic diagram showing the connection between the slider and the drive wheel.

[0032] Reference numerals: 1. Placement plate; 2. Cylinder; 3. Pressure plate; 4. Connecting plate; 5. Sliding frame; 6. Slider; 61. Side slope; 62. Top plane; 7. Compression spring; 8. Drive wheel; 81. Wedge; 9. Gear; 10. Rack. Detailed Implementation

[0033] The present invention will now be further described with reference to the accompanying drawings.

[0034] like Figure 1 , Figure 2 , Figure 3 As shown, this utility model discloses an underwear hot press machine, which mainly includes three parts: a hot pressing system, a motion conversion system, and a discharge drive system. The hot pressing system consists of a cylinder 2, a pressure plate 3, and a connecting plate 4; the motion conversion system consists of a sliding frame 5, a slider 6, a compression spring 7, and a drive wheel 8 with a wedge block 81; the discharge drive system consists of a gear 9, a rack 10, and a placement plate 1.

[0035] The placement plate 1 is a flat structure, its size matching that of the underwear blank, used to support the underwear blank. The placement plate 1 is located at the bottom of the working area of ​​the hot press and can slide horizontally. One end is connected to the rack 10, and the other free end can extend outward from the hot pressing area during discharge. To monitor the position of the placement plate 1, a microswitch can be installed at its end to confirm whether the placement plate has reached the predetermined position.

[0036] Cylinder 2 is fixed to the upper part of the frame, and its piston rod extends vertically downward and is connected to pressure plate 3. Cylinder 2 provides power for the reciprocating motion of pressure plate 3 and can be a common pneumatic or hydraulic cylinder.

[0037] The pressure plate 3 is a flat plate structure, positioned directly above the placement plate 1, and can move vertically up and down under the drive of the cylinder 2. The lower surface of the pressure plate 3 is a hot pressing working surface, which can be heated by a built-in heating element or an external heat source to achieve hot pressing forming of the underwear blank.

[0038] The connecting plate 4 is rigidly fixed to the pressure plate 3, usually by welding or bolting. The connecting plate 4 extends to the side of the pressure plate 3, and its function is to transmit the vertical movement of the pressure plate 3 to the sliding frame 5, ensuring that the two move synchronously.

[0039] The sliding frame 5 is connected to the connecting plate 4 and moves in a linear reciprocating motion together with the connecting plate 4. The sliding frame 5 slides along the linear guide rail 11 to ensure the stability of its motion trajectory. The linear guide rail 11 can be a common slide rail, guide column, or roller guide rail structure, which can provide precise guidance and support.

[0040] The slider 6, mounted on the sliding frame 5, is the core structure of this invention. The slider 6 has two contact surfaces: a side inclined surface 61 and a top plane 62. The angle between the side inclined surface 61 and the horizontal plane is 30°-60°, ensuring that the slider can smoothly pass over the wedge during the downward pressing phase. The top plane 62 is a horizontal surface, used for abutting against the wedge 81 during the return phase.

[0041] A compression spring 7 is positioned between the slider 6 and the sliding frame 5, enabling the slider 6 to maintain a certain preload under the spring force while allowing relative displacement when subjected to external force. The spring constant of the compression spring 7 is 2-5 N / mm. This range ensures that the slider can smoothly pass over the wedge in a compressed state during downward pressing, and also ensures sufficient abutment force between the slider and the wedge during the return stroke.

[0042] The drive wheel 8 has a disc-shaped structure with protruding wedges 81 on its rim, which abut against the top plane 62 when the pressure plate 3 moves upward. The drive wheel 8 is mounted on the frame by a bracket and can rotate freely around its axis.

[0043] Gear 9 is coaxially fixed with drive wheel 8, usually connected by a key to ensure synchronous rotation. Gear 9 meshes with rack 10, converting the rotational motion of drive wheel 8 into the linear motion of rack 10. The module of gear 9 and rack 10 is 1.5-3mm, a range that ensures both transmission strength and smooth movement and positioning accuracy.

[0044] The rack 10 is arranged horizontally, with one end connected to the placement plate 1 and the other end meshing with the gear 9.

[0045] The working principle of this utility model is as follows:

[0046] Material feeding stage: The operator places the underwear blank on the placement plate 1, which is located in the hot pressing working area.

[0047] Downward / Hot-pressing Stage: Cylinder 2 drives the pressure plate 3 downward, and the connecting plate 4 moves downward synchronously, driving the sliding frame 5 and the slider 6 downward together. During the downward movement, the side slope 61 of the slider 6 contacts the wedge 81 on the drive wheel 8. Due to the inclined setting of the side slope 61, the lateral force generated by the contact causes the slider 6 to move laterally under the action of the compression spring 7, thus passing over the wedge 81. At this time, the drive wheel 8 does not rotate, the gear 9 and rack 10 also remain stationary, while the compression spring 7 is compressed, stabilizing the placement plate 1 in the hot-pressing position, ensuring that the underwear blank does not shift during the hot-pressing process, and ensuring the quality of the hot-pressing.

[0048] Pressure holding / heat holding stage: The pressure plate 3 is held in the downward pressing position for a certain period of time to hot press and form the underwear blank. During this stage, the entire drive chain remains stationary.

[0049] Return / Discharge Stage: After hot pressing, cylinder 2 drives pressure plate 3 upward, and connecting plate 4 moves upward simultaneously, driving sliding frame 5 and slider 6 upward together. During the upward movement, the top plane 62 of slider 6 contacts and abuts against wedge 81, pushing wedge 81 forward, thereby driving drive wheel 8 to rotate. Since gear 9 is coaxially fixed with drive wheel 8, gear 9 also rotates, and through meshing with rack 10, converts the rotational motion into horizontal linear motion, pushing rack 10 and the connected placement plate 1 outward. At this time, the lingerie molded product is pushed out of the hot pressing area, making it easy for operators to remove or proceed to the next process.

[0050] Throughout the process, the timing of the hot pressing and unloading actions is determined by the geometric relationship of the mechanical structure, without relying on electrical control or sensors. This achieves a mechanical logic where the drive chain remains silent during the pressing phase and the material is automatically unloaded during the return phase. This setup ensures the stability of the workpiece position during hot pressing and automatically unloads the material after hot pressing, improving production efficiency and product quality.

[0051] This invention achieves rigid coupling between the hot pressing return stroke and the material discharge action through structural design, while the unidirectional drive mechanism of the slider-wedge ensures the correct timing separation of the two functions. Compared with traditional underwear hot press machines, this invention eliminates the independent discharge mechanism and complex control system, resulting in a simpler structure, higher reliability, easier maintenance, and lower cost, making it particularly suitable for industrial applications of underwear hot pressing.

[0052] To verify the above technical solution, the present invention designed the following experiment to evaluate the technical effect of the underwear heat press.

[0053] 1. The experiment employed a comparative testing method, comparing the proposed underwear hot press with three discharge methods (manual discharge, independent pusher cylinder discharge, and conveyor belt discharge). The test sample was standard underwear cup blanks. Each device was tested for 100 hot pressing cycles, and key indicators were recorded. The testing environment was standard workshop conditions (temperature 25±2℃, relative humidity 60±5%), and operation was performed by experienced technicians. Measuring tools included high-precision displacement sensors, laser thickness gauges, high-speed cameras, temperature sensors, and energy consumption monitors to ensure accurate and reliable data.

[0054] 2. Technical Effect Comparison Table

[0055]

[0056] 3. Verification Conclusion

[0057] Through comparative testing, the underwear hot press of this utility model is significantly superior to the traditional discharge solution in terms of technical indicators.

[0058] Workpiece stability tests show that the drive chain is completely silent during the pressing and hot pressing stage, and the workpiece micro-displacement is controlled within 0.05mm, far lower than the 0.3-0.5mm of the independent cylinder solution. The consistency of the forming edge reaches 96%, which is 18% higher than the traditional method. High-speed camera recordings show that the slider side slope perfectly passes over the wedge during the pressing stage without generating any drive wheel rotation.

[0059] Production cycle testing confirmed that this solution achieves an actual capacity of 185 pieces / hour, a 22% increase compared to the independent cylinder solution, saving 2-3 seconds of control delay and discharge start-up time per hot pressing cycle. This improvement stems from the mechanical coupling between the hot pressing return stroke and the discharge action, eliminating the need to wait for additional control signals.

[0060] In reliability testing, after 1000 hours of continuous operation, the mean time between failures (MTBF) of this invention reached 950 hours, a 46% improvement over traditional solutions. In a simulated high-temperature dust environment (45℃, dust concentration 5g / m³), [further testing was conducted]. 3 After running continuously for 72 hours, the failure rate was only 1.2%, which is 79% lower than the 5.8% of the traditional solution.

[0061] Cost analysis shows that by eliminating the independent discharge mechanism, control system, and sensors, the equipment manufacturing cost is reduced by 25%, and the number of parts is reduced by 60%. The average annual maintenance time is reduced from 48 hours to 16 hours, and maintenance costs are reduced by 72%.

[0062] In summary, the slider-wedge unidirectional drive and hot-press return discharge coupling setting of this utility model successfully realizes the mechanical intelligent separation of the hot pressing and discharge processes. It achieves efficient automatic discharge while ensuring high-quality hot pressing, significantly improving equipment performance and economy, and has broad application prospects.

Claims

1. A heat press for underwear, characterized in that, include: Placement board (1) is used to hold underwear blanks; Cylinder (2) is disposed above the placement plate (1); The pressure plate (3) is connected to the piston rod of the cylinder (2) and moves up and down under the drive of the cylinder (2); The connecting plate (4) is rigidly fixed to the pressure plate (3); The sliding frame (5) is connected to the connecting plate (4) and moves linearly back and forth with the connecting plate (4); The slider (6), mounted on the sliding frame (5), has a side slope (61) and a top plane (62); A compression spring (7) is disposed between the slider (6) and the sliding frame (5); The drive wheel (8) has a wedge (81) on its rim, and the wedge (81) can contact the side slope (61) or top plane (62) of the slider (6); Gear (9) is coaxially fixed with the drive wheel (8); The rack (10) meshes with the gear (9) and is connected to the placement plate (1).

2. The underwear heat press according to claim 1, characterized in that, When the pressure plate (3) moves downward, the side slope (61) of the slider (6) contacts the wedge (81) and passes over the wedge (81), and the drive wheel (8) does not rotate.

3. The underwear heat press according to claim 1, characterized in that, When the pressure plate (3) moves upward, the top plane (62) of the slider (6) abuts against the wedge (81), causing the drive wheel (8) to rotate, and the gear (9) rotates accordingly, driving the rack (10) to push the placement plate (1) to move outward.

4. The underwear heat press according to claim 1, characterized in that, The angle between the inclined surface (61) of the slider (6) and the horizontal plane is 30°-60°.

5. The underwear heat press according to claim 1, characterized in that, The elastic coefficient of the compression spring (7) is 2-5 N / mm.

6. The underwear heat press according to claim 1, characterized in that, The module of the gear (9) and the rack (10) is 1.5-3mm.

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