Automatic heating pressing plate of continuous hot press

Abstract

The utility model provides an automatic heating pressing plate of a continuous hot press, and belongs to the technical field of continuous hot press equipment. The hot press comprises two hot press plates which are oppositely arranged, a heating plate is embedded in each hot press plate, each heating plate is composed of a plurality of heating units which are uniformly distributed, and each heating unit is provided with a heating rod, a thermocouple and a heat conduction block so as to guarantee that heat is efficiently and uniformly transmitted to a product to be processed. A liquid medium cavity is formed in the hot pressing plate and filled with a liquid medium, and the temperature of the hot pressing plate is kept stable. And a combined structure of oil absorption holes and oil absorption felts is also arranged to clean oil stains on the steel belt. According to the utility model, the problems of sealing material aging, thermal expansion deformation, local overheating and uneven heat dissipation of the pressing plate of the continuous hot press at high temperature are effectively solved, the maintenance cost is reduced, the stability of hot pressing work is ensured, and the production efficiency and the product quality are obviously improved.

Description

Technical Field

[0001] This utility model relates to the technical field of continuous hot press equipment, specifically to an automatically heated pressing plate for a continuous hot press. Background Technology

[0002] Continuous hot presses are widely used in composite material molding equipment, achieving rapid molding or bonding of materials by continuously applying high temperature and high pressure. The pressure plate, as the core component of a continuous hot press, directly provides uniform high temperature and pressure, and its performance directly affects production efficiency and product quality.

[0003] In existing technologies, pressure plates are typically made of metallic materials (such as alloy steel or aluminum alloy) and integrate internal heating elements (such as heating tubes or heating wires), with temperature regulated by an external control system. However, because pressure plates need to operate in a high-temperature environment (e.g., 200-400℃) for extended periods during continuous operation, this high temperature poses a significant challenge to the structural stability and sealing performance of the pressure plates.

[0004] 1) Aging of sealing materials: The sealing structure between the pressure plate and the equipment frame (such as rubber sealing rings, high-temperature rubber strips, etc.) is exposed to high temperature for a long time, which can easily cause hardening, cracking or deformation, leading to sealing failure and causing air leakage and pressure leakage. In severe cases, it is necessary to stop the machine to replace the sealing parts, which increases maintenance costs.

[0005] 2) Thermal expansion and deformation: The pressure plate deforms due to thermal expansion at high temperature, which changes the fit clearance with adjacent components (such as hydraulic cylinders and guide rails), further aggravating seal wear and shortening the seal life.

[0006] 3) Local overheating and uneven heat dissipation: Traditional pressure plate heating elements have a simple layout or insufficient temperature control precision, which can easily lead to uneven temperature distribution on the pressure plate surface. Local overheating accelerates the deterioration of sealing materials, while low temperature areas may affect processing quality.

[0007] Therefore, there is an urgent need for a new type of platen structure for a continuous hot press to solve the above problems. Utility Model Content

[0008] In view of the problems existing in the prior art, this utility model provides an automatically heated platen for a continuous hot press, which can effectively protect the sealing structure and extend the sealing life under high temperature working conditions, while ensuring the uniformity of heating and the accuracy of temperature control of the hot platen, so as to meet the needs of efficient and stable continuous production.

[0009] To achieve the above objectives, this utility model provides an automatically heated pressure plate for a continuous hot press, comprising two hot pressure plates arranged opposite each other, with conductive steel belts provided on the inner sides of the two hot pressure plates, and the product to be processed placed between the two conductive steel belts;

[0010] The hot press plate is embedded with a heating plate, which includes several heating units; the inner surface of the hot press plate is provided with two sealing structures around its circumference.

[0011] The heating unit is equipped with a heating rod and a thermocouple. A heat-conducting block slot is provided on one side of the heating unit, and a heat-conducting block is embedded in the heat-conducting block slot.

[0012] Preferably, a plurality of the heating units are arranged along the length of the hot press plate, and the heating units are fixedly mounted on the hot press plate by bolts.

[0013] Preferably, the heating unit has multiple heating holes along the length of the hot press plate, the heating rod is embedded in the heating holes, and the heating rod is connected to an external power source through a heating rod power cord.

[0014] Preferably, the heat-conducting block is movably embedded in the heat-conducting block slot, and the bottom of the side of the heat-conducting block is elastically connected to the heating unit through multiple high-temperature resistant springs.

[0015] Preferably, depending on the nature of the product to be processed and the processing technology, the thermocouple can be set to different heating temperatures for the heating unit.

[0016] Preferably, a plurality of oil suction holes are arranged between the two sealing structures, and the oil suction holes are connected to an external vacuum pump.

[0017] Preferably, the hot press plate has a closed liquid medium cavity inside, and the liquid medium cavity is filled with liquid medium.

[0018] Preferably, the bottom of the two sealing structures is provided with a liquid medium channel, which is connected to the liquid medium cavity.

[0019] Preferably, the hot press plate has a groove on the inlet side, a plurality of oil suction holes are arranged on the surface of the groove, oil suction felt is provided in the groove, and an oil suction through hole is provided at the bottom of the groove along the length direction. The oil suction through hole is connected to an external vacuum pump through a connecting pipe.

[0020] Preferably, the hot press plate has a groove on the outlet side, a plurality of oil suction holes are arranged on the surface of the groove, an oil scraper is provided in the groove, and an oil suction through hole is provided at the bottom of the groove along the length direction. The oil suction through hole is connected to an external vacuum pump through a connecting pipe.

[0021] The beneficial technical effects achieved by this utility model are:

[0022] 1) The heating plate is wrapped by two circumferentially sealed structures on the inner surface of the hot press plate, which prevents heat loss and pressure leakage and reduces the intrusion of external impurities. At the same time, the liquid medium channels at the bottom of the two sealing structures are filled with circulating liquid medium, forming a heat insulation barrier to protect the sealing structure from exposure to high temperatures, prevent aging and deformation due to high temperatures, and extend the service life of the sealing structure.

[0023] 2) The hot press plate is equipped with a liquid medium cavity. The cavity is filled with a heat-insulating liquid medium and circulates to maintain the temperature of the hot press plate at about 120 degrees Celsius, reduce heat loss, and ensure that the temperature of the rest of the hot press plate, except for the heating plate and the heat-conducting block, is at a low level. This reduces the deformation caused by thermal expansion of the press plate, ensures the fit clearance with adjacent components, and ensures the sealing and stability of the press plate structure.

[0024] 3) The heating plate of this application consists of multiple heating units, each of which is equipped with a heating rod, a thermocouple, and a heat-conducting block. The heating rod generates heat using the heating effect of electric current and conducts the heat evenly to the conductive steel strip through the heat-conducting block, ensuring uniform heating of the product to be processed. The high-temperature resistant spring connected to the heat-conducting block can extend and retract to ensure that the heat-conducting block and the conductive steel strip are always in close contact, ensuring efficient heat transfer and ensuring processing quality. The thermocouple can set the heating temperature for different heating units according to the properties of the product to be processed and the specific processing technology, and can automatically control the temperature to meet higher processing requirements.

[0025] 4) In addition, the oil-absorbing combination structure of the oil-absorbing felt and oil scraper on the inlet and outlet sides of the hot press plate can clean the oil stains on the steel belt in time, prevent the oil stains from affecting the hot pressing effect, and further ensure the stability of the hot pressing operation and the product quality. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the pressure plate of an embodiment of an automatically heated pressure plate of a continuous hot press according to the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the automatically heated platen of a continuous hot press according to the present invention;

[0028] Figure 3 This invention relates to an embodiment of an automatically heated pressure plate of a continuous hot press. Figure 2 Cross-sectional view along the E direction;

[0029] Figure 4 This is a schematic diagram of the heating unit structure of an embodiment of an automatically heated pressure plate of a continuous hot press according to the present invention;

[0030] Figure 5 This invention relates to an embodiment of an automatically heated pressure plate of a continuous hot press. Figure 3 A magnified view of a portion of region II;

[0031] Figure 6 This invention relates to an embodiment of an automatically heated pressure plate of a continuous hot press. Figure 5 Schematic diagram of the structure of the medium-sized groove;

[0032] In the attached diagram: 1. Hot press plate; 2. Conductive steel belt; 3. Heating plate; 4. Heating unit; 5. Heating rod; 6. Heating hole; 7. Thermocouple; 8. Heat-conducting block; 9. Heat-conducting block slot; 10. High-temperature resistant spring; 11. Heating rod power harness; 12. Double sealing structure; 13. Oil suction hole; 14. Liquid medium cavity; 15. Liquid medium channel; 16. Strip groove; 17. Oil suction hole; 18. Oil suction through hole; 19. Oil-absorbing felt. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0037] To better understand the purpose, structure, and function of this utility model, the following detailed description of the automatically heated pressure plate of a continuous hot press according to the present utility model is provided in conjunction with the accompanying drawings.

[0038] This embodiment provides an automatically heated pressure plate for a continuous hot press, including two hot press plates 1 arranged opposite each other. The inner sides of the two hot press plates 1 are respectively provided with conductive steel belts 2. The product to be processed is placed between the two conductive steel belts 2, and the conductive steel belts 2 transport the product to be processed between the two hot press plates 1 for pressurization and heating.

[0039] A heating plate 3 is embedded in the middle of the hot press plate 1. The heating plate 3 includes several heating units 4. Two sealing structures 12 are arranged around the inner surface of the hot press plate 1 in the circumferential direction.

[0040] The heating unit 4 is equipped with a heating rod 5 and a thermocouple 7. A heat-conducting block groove 9 is located on the side of the heating unit 4 near the conductive steel strip 2, and a heat-conducting block 8 is embedded within the heat-conducting block groove 9. In one possible implementation, the heating rod 5 and the thermocouple 7 are positioned at the bottom of the heat-conducting block groove 9. The heating temperature can be controlled by the thermocouple 7, and the heat-conducting block 8 is used to uniformly conduct heat.

[0041] Furthermore, several heating units 4 are evenly arranged along the length of the hot press plate 1 to ensure that heat is evenly distributed to the surface of the conductive steel belt. Each heating unit 4 is fixedly mounted on the hot press plate with bolts. Multiple heating holes 6 are opened in the heating unit 4 along the length of the hot press plate, and a heating rod 5 is embedded in each heating hole 6. The heating rod 5 is connected to a heating rod power cord, and multiple heating rod power cords are converged into a heating rod power cord bundle 11 to connect to an external power source to obtain the electrical energy required for the operation of the hot press plate.

[0042] Furthermore, the heat-conducting block 8 is movably embedded in the heat-conducting block slot 9, and the bottom of the side of the heat-conducting block 8 is elastically connected to the heating unit 4 through multiple high-temperature resistant springs 10. The spring force ensures that the heat-conducting block and the conductive steel belt are always in close contact, efficiently transferring heat.

[0043] Furthermore, depending on the nature of the product to be processed and the processing technology, the thermocouple 7 can set different heating temperatures for the heating unit 4. For example, if the heating plate 1 includes 10 heating units 4, theoretically ten different temperatures can be set, which can better match the processing technology of the product to be processed.

[0044] Furthermore, the two sealing structures 12 can specifically use sealing strips or sealing rings. The two sealing structures 12 enclose the heating plate, effectively preventing heat loss, pressure leakage, and intrusion of external impurities during operation, ensuring a sealing effect. Multiple oil suction holes 13 are arranged between the two sealing structures 12, and these holes are connected to an external vacuum pump. During hot pressing, if hydraulic oil leaks and soaks through the first sealing structure, the oil suction holes 13 can promptly absorb and collect it, preventing hydraulic oil from interfering with the hot pressing operation, reducing the risk of oil spillage onto the steel belt or other components, and ensuring the sealing and stability of the pressing plate.

[0045] Furthermore, the hot press plate 1 has a closed liquid medium cavity 14 inside, specifically located at the bottom of the heating unit 4. The liquid medium cavity 14 is filled with a liquid medium that has heat insulation properties, specifically heat-insulating oil. The bottom of the two sealing structures 12 has a liquid medium channel 15, which communicates with the liquid medium cavity 14. In practice, the liquid medium cavity 14 can be pumped into the cavity by connecting an external gear pump, and the pressure inside the cavity can be adjusted by connecting a high-pressure valve. This ensures that the liquid medium temperature is maintained at around 120 degrees Celsius, which reduces heat loss and ensures that the temperature inside the hot press plate, except for the heating plate and heat-conducting block which are at higher temperatures, remains relatively low, thus ensuring the structural sealing and stability of the hot press plate under long-term high-temperature conditions. In addition, the liquid medium channel 14 at the bottom of the two sealing structures 12 forms a stable heat insulation barrier, effectively protecting the sealing ring from exposure to high temperatures and preventing aging and deformation due to prolonged exposure to high temperatures, thereby extending the service life of the sealing structure.

[0046] When using hot press plates, the product to be processed is placed between two conductive steel belts 2. The conductive steel belts transfer the product to be processed between the two hot press plates 1. The upper and lower hot press plates 1 apply high pressure to the conductive steel belts 2 with the help of the internal liquid medium. The upper and lower heating plates 1 heat the conductive steel belts 2 through heat conduction. The pressure and heat are then evenly transferred to the product to be processed through the conductive steel belts 2, thereby achieving precise and effective pressure heating treatment of the product to be processed.

[0047] During automatic heating of the hot press plate, thermocouple 7 sets the heating temperature for different heating units according to the properties of the product to be processed and the specific processing technology. In the automatic heating process, the heating rod 5 of heating unit 4 generates heat using the current heating effect and evenly conducts the heat to the conductive steel belt through the heat-conducting block 8, ensuring uniform heating of the product to be processed. Simultaneously, the high-temperature resistant spring 10 connected to the heat-conducting block 8 can extend and retract to ensure that the heat-conducting block 8 and the conductive steel belt 2 are always in close contact, guaranteeing efficient heat transfer. Thermocouple 7 can monitor the temperature of heating unit 4 in real time. When the temperature is lower or higher than the preset temperature, thermocouple 7 converts the temperature signal into an electrical signal and feeds it back to the control system. The control system will correspondingly increase or decrease the current of the heating rod 5 to adjust the generated heat, achieving automatic heating control and ensuring accurate temperature control.

[0048] Furthermore, a strip-shaped groove 16 is provided on the inlet side of the hot press plate 1, and a plurality of oil suction holes 17 are evenly arranged on the surface of the groove. An oil-absorbing felt 19 is placed inside the strip-shaped groove 16, and an oil-absorbing through hole 18 extending along the length direction is provided at the bottom of the strip-shaped groove 16. This oil-absorbing through hole 18 is connected to an external vacuum pump via a connecting pipe. During operation, the oil-absorbing felt 19 contacts the surface of the steel belt to wipe away the oil. The oil absorbed by the oil-absorbing felt 19 flows sequentially through the plurality of oil suction holes 17 and the oil-absorbing through hole 18 on the strip-shaped groove 16, and is finally sucked away by the vacuum pump. This prevents oil contamination of the product to be processed and the conductive steel belt.

[0049] Furthermore, a strip-shaped groove is provided on the outlet side of the hot press plate. Several oil suction holes are evenly arranged on the surface of the groove. The oil scraper is placed inside the groove, and a through-hole for oil suction runs along the length of the groove at its bottom. This through-hole is connected to an external vacuum pump via a connecting pipe. The oil scraper is specifically made of a highly elastic and high-temperature resistant rubber, ensuring contact with the steel belt. The oil scraped off by the scraper enters the groove, and is then sucked away by the vacuum pump.

[0050] Furthermore, the outer edge of the inlet side of the hot press plate is provided with an anti-scratch rubber strip to ensure that the steel strip does not scratch the steel strip body.

[0051] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An automatically heated pressure plate for a continuous hot press, characterized in that, It includes two hot press plates arranged opposite each other, and the inner sides of the two hot press plates are respectively provided with conductive steel strips, and the product to be processed is placed between the two conductive steel strips; The hot press plate is embedded with a heating plate, which includes several heating units; the inner surface of the hot press plate is provided with two sealing structures around its circumference. The heating unit is equipped with a heating rod and a thermocouple. A heat-conducting block slot is provided on one side of the heating unit, and a heat-conducting block is embedded in the heat-conducting block slot.

2. The automatically heated pressure plate of a continuous hot press according to claim 1, characterized in that, Several heating units are arranged along the length of the hot press plate, and the heating units are fixedly mounted on the hot press plate by bolts.

3. The automatically heated pressure plate of a continuous hot press according to claim 1, characterized in that, The heating unit has multiple heating holes along the length of the hot press plate, and the heating rod is embedded in the heating holes. The heating rod is connected to an external power source through a heating rod power cord.

4. The automatically heated pressure plate of a continuous hot press according to claim 1, characterized in that, The heat-conducting block is movably embedded in the heat-conducting block slot, and the bottom of the side of the heat-conducting block is elastically connected to the heating unit through multiple high-temperature resistant springs.

5. The automatically heated pressure plate of a continuous hot press according to claim 1, characterized in that, Depending on the nature of the product to be processed and the processing technology, the thermocouple can be set to different heating temperatures for the heating unit.

6. The automatically heated pressure plate of a continuous hot press according to claim 1, characterized in that, Multiple oil suction holes are arranged between the two sealing structures, and the oil suction holes are connected to an external vacuum pump.

7. The automatically heated pressure plate of a continuous hot press according to claim 1, characterized in that, The hot press plate has a closed liquid medium cavity inside, and the liquid medium cavity is filled with liquid medium.

8. The automatically heated pressure plate of a continuous hot press according to claim 7, characterized in that, The bottom of the two sealing structures is provided with a liquid medium channel, which is connected to the liquid medium cavity.

9. The automatically heated pressure plate of a continuous hot press according to claim 1, characterized in that, The hot press plate has a groove on the inlet side, and a number of oil suction holes are arranged on the surface of the groove. Oil suction felt is provided in the groove, and an oil suction through hole is provided at the bottom of the groove along the length direction. The oil suction through hole is connected to an external vacuum pump through a connecting pipe.

10. The automatically heated pressure plate of a continuous hot press according to claim 1, characterized in that, The hot press plate has a groove on the outlet side, and a number of oil suction holes are arranged on the surface of the groove. An oil scraper is provided in the groove, and an oil suction through hole is provided at the bottom of the groove along the length direction. The oil suction through hole is connected to an external vacuum pump through a connecting pipe.

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