Mould pressing foaming system heated through gas

Abstract

The utility model relates to the technical field of plate processing, and discloses a mold pressing foaming system heated through gas. The system comprises a PLC control system, a preheating module, an oiling device and a hot pressing device, wherein the PLC control system is electrically connected with the preheating module, the oiling device and the hot pressing device respectively; the preheating module comprises a storage tank, a liquid pump, a vaporizer, a first heat exchanger, a steel cylinder set and a second heat exchanger which are sequentially connected, the preheating module further comprises a temperature controller, the temperature controller is connected with the first heat exchanger, the steel cylinder set and the second heat exchanger, and the second heat exchanger is connected with the hot pressing device. Liquid carbon dioxide in a storage tank is pressurized to set gas pressure through a liquid pump, the liquid carbon dioxide is gasified into carbon dioxide gas through a gasifier, the carbon dioxide gas sequentially enters a first heat exchanger, a steel cylinder set and a second heat exchanger for heat exchange, and then the carbon dioxide gas after heat exchange is fed into a hot pressing device to preheat a plate. And the work of the preheating module can be controlled through the PLC control system, so that the working steps are simplified, and the mold pressing efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of sheet material processing, and in particular to a gas-heated compression foaming system. Background Art

[0002] At present, the board production generally adopts the compression foaming machine, which heats the slab after laying and forming through the compression foaming machine, and presses it to make PP foamed board with certain mechanical strength and water resistance. Whether it is the wet production of hard board or semi-hard board, or the dry production of hard board or medium density board, the compression foaming machine can be used for hot pressing.

[0003] Traditional compression molding and foaming machines require the sheets to be preheated before compression molding, and then the preheated sheets are manually fed into the foaming machine for hot compression. The working steps are relatively complicated, resulting in low compression molding efficiency. Utility Model Content

[0004] The technical problem to be solved by the present application is to realize the integrated control of the molding and foaming system, so that the plate can be preheated in the molding and foaming machine without manual loading of the preheated plate, thereby simplifying the working steps and improving the molding efficiency.

[0005] In order to solve the above problems, the present application provides a molding foaming system heated by gas, including a PLC control system, a preheating module, an oiling device and a hot pressing device, the PLC control system is electrically connected to the preheating module, the oiling device and the hot pressing device respectively; the preheating module includes a storage tank, a liquid pump, a vaporizer, a first heat exchanger, a cylinder group and a second heat exchanger connected in sequence, the preheating module also includes a temperature controller, the temperature controller is respectively connected to the first heat exchanger, the cylinder group and the second heat exchanger, and the second heat exchanger is connected to the hot pressing device.

[0006] Preferably, the steel cylinder group includes a plurality of connected steel cylinders, and the steel cylinders are respectively connected to the first heat exchanger and the second heat exchanger.

[0007] Preferably, the outside of the steel cylinder is wrapped with two connected heating cloths, and the heating cloths are connected to the temperature controller.

[0008] Preferably, the hot pressing device includes a device body, a driving mechanism, a heating mechanism and several layers of hot pressing plates, the device body is provided with an upper top seat and a lower base, the hot pressing plates are placed horizontally and stacked in the device body, and two adjacent layers of the hot pressing plates are arranged at intervals; the oiling device is connected to the driving mechanism, and the output end of the driving mechanism is connected to the lower base; the heating mechanism is arranged on the outside of the device body, and the heating mechanisms are respectively connected to the corresponding hot pressing plates.

[0009] Preferably, the oiling device comprises an oil tank and an oil pump, and the oil pump is connected to the oil tank and the driving mechanism respectively.

[0010] Preferably, the driving mechanism comprises an oil cylinder and a hydraulic cylinder, the oil cylinder is connected to the oil pump and provides power for the hydraulic cylinder, and the output end of the hydraulic cylinder is connected to the lower base.

[0011] Preferably, the heating mechanism comprises an oil bag and a plurality of heat-conducting oil pipes, and each of the heat-conducting oil pipes is respectively connected to the corresponding oil bag and the hot pressing plate.

[0012] Preferably, the heating mechanism further comprises regulating valves, and the regulating valves are respectively arranged on the heat transfer oil pipes.

[0013] Preferably, the heating mechanism is provided with two groups, the two groups of the heating mechanism are respectively located on both sides of the device body, and the heating mechanism is respectively connected to the two ends of the corresponding hot pressing plate.

[0014] Preferably, the device body is provided with an air inlet, and the air inlet is connected to the second heat exchanger.

[0015] Compared with the prior art, the present invention has at least one of the following beneficial technical effects:

[0016] Here, liquid carbon dioxide gas is stored in the storage tank, and the liquid carbon dioxide is pressurized to the set gas pressure through the liquid pump. The upper and lower pressures of the gas are set through the PLC control system. When the pressure at the outlet of the liquid pump is lower than the set lower pressure, the liquid pump automatically starts to pressurize the liquid carbon dioxide gas to the set gas pressure. The liquid carbon dioxide gas is then gasified by the gasifier to obtain carbon dioxide gas, and enters the first heat exchanger for heating. After heat exchange in the first heat exchanger, the carbon dioxide gas enters the cylinder group for further heating. The heating temperature and heating time of the cylinder group are set through the PLC control system. The carbon dioxide gas then enters the second heat exchanger for further heat exchange, thereby reaching the temperature required for the foaming of the plate, and then the heat-exchanged carbon dioxide gas is sent to the hot pressing device to preheat the plate.

[0017] To this end, integrated control of the compression molding and foaming system is implemented. The heated carbon dioxide gas is controlled to preheat the plate, so that the plate can be preheated in the compression molding and foaming machine. There is no need to manually load the preheated plate, thereby simplifying the working steps and improving the compression molding efficiency and operation safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the preheatable compression molding foaming system in this application;

[0020] Figure 2 It is a schematic diagram of the structure of the oiling device and the hot pressing device in this application;

[0021] Figure 3 It is a schematic diagram of the structure of the steel cylinder and the heating cloth in this application.

[0022] Explanation of the reference numerals: 1. Oiling device; 11. Oil tank; 111. Oil filling port; 12. Oil pump; 2. Hot pressing device; 21. Device body; 211. Upper top seat; 212. Lower base; 22. Driving mechanism; 221. Hydraulic cylinder; 222. Oil cylinder; 23. Heating mechanism; 231. Oil bag; 232. Heat transfer oil pipe; 2321. Regulating valve; 24. Hot pressing plate; 25. Exhaust valve; 26. Air inlet; 3. Ground; 4. Cylinder; 5. Heating cloth. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0025] It should also be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in this application specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plural forms unless the context clearly indicates otherwise.

[0026] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0027] Please refer to Figures 1 to 3 The embodiment of the present application provides a compression molding foaming system heated by gas, which is used for hot pressing of plates. Specifically, the compression molding foaming system includes a PLC control system, a preheating module, an oiling device 1 and a hot pressing device 2. The PLC control system is electrically connected to the preheating module, the oiling device 1 and the hot pressing device 2 respectively. The operation of the preheating module, the oiling device 1 and the hot pressing device 2 can be controlled by the PLC control system, thereby improving work efficiency and reducing labor costs.

[0028] In a specific embodiment, the preheating module includes a storage tank, a liquid pump, a vaporizer, a first heat exchanger, a steel cylinder group, and a second heat exchanger connected in sequence. The preheating module also includes a temperature controller, which is respectively connected to the first heat exchanger, the steel cylinder group, and the second heat exchanger to control the temperature, and the second heat exchanger is connected to the hot pressing device 2 to send gas into the hot pressing device 2 to preheat the plate.

[0029] Here, liquid carbon dioxide gas is stored in the storage tank, and the gas pressure is 2.1MPa. The liquid carbon dioxide is pressurized to a set gas pressure by a liquid pump. In this embodiment, the maximum pressure of the liquid pump is 20MPa. The upper and lower pressures of the gas are set by a PLC control system. In this embodiment, the lower pressure is set to 16MPa and the upper pressure is set to 18MPa. When the pressure at the outlet of the liquid pump is lower than the set lower pressure of 16MPa, the liquid pump automatically starts to pressurize the liquid carbon dioxide gas to 18MPa. The liquid carbon dioxide gas is then gasified in a gasifier to obtain carbon dioxide gas, and enters the first heat exchanger for heat exchange. After heat exchange in the first heat exchanger, the carbon dioxide gas enters the cylinder group for further heating. The heating temperature and heating time of the cylinder group are set by the PLC control system. Then the carbon dioxide gas enters the second heat exchanger through the 316 stainless steel pipe for further heat exchange. In this embodiment, the temperature of the second heat exchanger is set to 150°C, which can ensure that the temperature of the carbon dioxide gas entering the hot pressing device 2 reaches above 145°C, thereby reaching the temperature required for the foaming of the plate, and then the carbon dioxide gas after heat exchange is sent to the hot pressing device 2 to preheat the plate.

[0030] In this regard, integrated control of the molding foaming system is achieved. By controlling the heating of the carbon dioxide gas to subsequently preheat the plate, the plate can be preheated directly in the hot pressing device 2, without the need for manual loading of the preheated plate, reducing the possibility of workers being scalded during the loading process, thereby simplifying the working steps and improving the molding efficiency and operation safety.

[0031] In a specific embodiment, the cylinder group includes a plurality of connected cylinders 4, and the cylinders 4 are respectively connected to the first heat exchanger and the second heat exchanger. In this embodiment, the number of cylinders 4 is set to 40, and in other embodiments, the number of cylinders 4 can also be set to 30, 50 or 60, etc. By setting a plurality of cylinders 4 to heat the carbon dioxide gas, the heating efficiency can be improved.

[0032] Please refer to Figure 3 In a specific embodiment, the cylinder 4 is wrapped with two connected heating cloths 5, and the heating cloths 5 are connected to a temperature controller. Here, the heating temperature and heating time of the heating cloths 5 can be adjusted by the temperature controller. In this embodiment, the heating temperature of the heating cloths 5 is set to 60°C, and the time for the cylinder 4 to heat the carbon dioxide gas is set to 2 hours each time to ensure that the carbon dioxide gas can reach 60°C after heating, and then enter the second heat exchanger for further heat exchange.

[0033] Please refer to Figure 2 In a specific embodiment, the hot pressing device 2 includes a device body 21, a driving mechanism 22, a heating mechanism 23 and a plurality of hot pressing plates 24. The device body 21 is provided with an upper top seat 211 and a lower base 212, and a plurality of hot pressing plates 24 are placed and stacked on the device body 21 in a horizontal direction, and two adjacent layers of hot pressing plates 24 are arranged at equal distances, and a plurality of hot pressing plates 24 are respectively located between the upper top seat 211 and the lower base 212, and the hot pressing plates 24 can slide in the vertical direction of the device body 21. The oiling device 1 is connected to the driving mechanism 22, and the output end of the driving mechanism 22 is connected to the lower base 212; the heating mechanism 23 is arranged outside the device body 21, and the heating mechanism 23 is respectively connected to the corresponding plurality of hot pressing plates 24.

[0034] The hydraulic oil is injected into the driving mechanism 22 through the oiling device 1 to supply oil for the operation of the hot pressing device 2. After the plate is loaded, the plate is preheated by the high-temperature carbon dioxide gas entering the device body 21. The preheating temperature and preheating time can be set by the PLC control system. In this embodiment, the preheating temperature is set to 120-160°C, and the preheating time is set to 40-180 minutes.

[0035] After the sheet is preheated, the driving mechanism 22 is started through the PLC control system, so that the driving mechanism 22 drives the lower base 212 to push the hot pressing plate 24 upward layer by layer and close the mold with the upper top seat 211 to press the sheet to a preset pressure. Here, each layer of hot pressing plate 24 is connected through the heating mechanism 23, and heat transfer oil is provided to each layer of hot pressing plate 24, so that multiple layers of sheets can be molded at the same time, thereby improving the molding efficiency. After the hot pressing device 2 hot presses the sheet for a preset time, the driving mechanism 22 is started through the PLC control system to open the mold, and the hot pressed sheet is taken out and placed in the shaping machine for shaping for a certain period of time.

[0036] In a specific embodiment, the oiling device 1 includes an oil tank 11 and an oil pump 12, and the oil pump 12 is connected to the oil tank 11 and the driving mechanism 22. Among them, an oil filling port 111 is opened on the top of the oil tank 11. The staff first injects hydraulic oil into the oil tank 11 through the oil filling port 111 for storage. When the hot pressing device 2 needs to be used, the hydraulic parameters are set through the PLC control system, and the oil pump 12 is controlled to pump a certain amount of hydraulic oil into the driving mechanism 22 to supply oil for the operation of the hot pressing device 2.

[0037] In a specific embodiment, the driving mechanism 22 includes an oil cylinder 222 and a hydraulic cylinder 221. The oil cylinder 222 is connected to the oil pump 12 and provides power for the hydraulic cylinder 221; the output end of the hydraulic cylinder 221 is connected to the lower base 212 to drive the lower base 212 to push the hot press plate 24 upward to slide and close the mold layer by layer, so that the hot press plate 24 presses the plate to a preset pressure. Here, guide rods are provided on both sides of the device body 21 in the vertical direction, and the two sides of the hot press plate 24 are respectively sleeved on the guide rods, so as to keep the hot press plate 24 stable and balanced in the vertical direction to avoid position displacement.

[0038] In a specific embodiment, the heating mechanism 23 includes an oil bag 231 and a plurality of heat-conducting oil pipes 232, each heat-conducting oil pipe 232 is respectively connected to the corresponding oil bag 231 and the hot pressing plate 24. In this embodiment, the hot pressing plate 24 is provided with nine layers, and correspondingly, nine heat-conducting oil pipes 232 are provided, and heat-conducting oil is provided to each layer of the hot pressing plate 24 through the oil bag 231 and the heat-conducting oil pipes 232.

[0039] Furthermore, the heating mechanism 23 also includes a regulating valve 2321, which is respectively arranged on each heat transfer oil pipe 232. The staff can observe the temperature of each layer of hot pressing plate 24 through the PLC control system, and redistribute the oil amount through the regulating valve 2321 according to the different temperatures of each layer of hot pressing plate 24, so as to evenly heat each layer of hot pressing plate 24 and improve the hot pressing effect and efficiency of the plate.

[0040] In a specific embodiment, two groups of heating mechanisms 23 are provided. The two groups of heating mechanisms 23 are respectively located on both sides of the device body 21 and are respectively connected to the two ends of several layers of hot pressing plates 24, so that the oil distribution in each layer of hot pressing plates 24 is more uniform, thereby accelerating the oil supply speed.

[0041] In a specific embodiment, the hot pressing device 2 further includes an exhaust valve 25. The exhaust valve 25 is disposed on the device body 21, connecting the inside of the device body 21 with the external environment. After the hot pressing device 2 hot presses the plate for a preset time, the exhaust valve 25 is first opened through the PLC control system, and after the gas in the device body 21 is completely exhausted, the driving mechanism 22 is started to open the mold to prevent injuries to the staff.

[0042] In a specific embodiment, an air inlet 26 is provided at the bottom of the device body 2, and the air inlet 26 is used to connect the inside of the device body 2 with the second heat exchanger, so that the second heat exchanger can send carbon dioxide gas into the device body 2, and set the appropriate gas pressure, hot pressing temperature and hot pressing time of the hot pressing device 2 through the PLC control system. In this embodiment, the hot pressing temperature is set to 140-170°C, preferably 155°C, and the hot pressing time is set to 40-180 minutes.

[0043] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A gas heated compression foaming system, characterized in that: It includes a PLC control system, a preheating module, an oiling device and a hot pressing device, wherein the PLC control system is electrically connected to the preheating module, the oiling device and the hot pressing device respectively; The preheating module includes a storage tank, a liquid pump, a vaporizer, a first heat exchanger, a cylinder group and a second heat exchanger which are connected in sequence. The preheating module also includes a temperature controller which is respectively connected to the first heat exchanger, the cylinder group and the second heat exchanger. The second heat exchanger is connected to the hot pressing device.

2. A gas heated compression foaming system according to claim 1, characterized in that: The steel cylinder group includes a plurality of connected steel cylinders, and the steel cylinders are respectively connected to the first heat exchanger and the second heat exchanger.

3. A gas heated compression foaming system according to claim 2, characterized in that: The outside of the steel cylinder is wrapped with two connected heating cloths, and the heating cloths are connected to the temperature controller.

4. A gas heated compression foaming system according to claim 1, characterized in that: The hot pressing device includes a device body, a driving mechanism, a heating mechanism and several layers of hot pressing plates. The device body is provided with an upper top seat and a lower base. The hot pressing plates are placed horizontally and stacked in the device body, and two adjacent layers of the hot pressing plates are arranged at intervals; the oiling device is connected to the driving mechanism, and the output end of the driving mechanism is connected to the lower base; the heating mechanism is arranged on the outside of the device body, and the heating mechanisms are respectively connected to the corresponding hot pressing plates.

5. A gas heated compression foaming system according to claim 4, characterized in that: The oiling device comprises an oil tank and an oil pump, and the oil pump is connected to the oil tank and the driving mechanism respectively.

6. A gas heated compression foaming system according to claim 5, characterized in that: The driving mechanism comprises an oil cylinder and a hydraulic cylinder. The oil cylinder is connected to the oil pump and provides power for the hydraulic cylinder. The output end of the hydraulic cylinder is connected to the lower base.

7. A gas heated compression foaming system according to claim 4, characterized in that: The heating mechanism comprises an oil bag and a plurality of heat-conducting oil pipes, and each of the heat-conducting oil pipes is respectively connected to the corresponding oil bag and the hot pressing plate.

8. A gas heated compression foaming system according to claim 7, characterized in that: The heating mechanism also includes regulating valves, and the regulating valves are respectively arranged on the heat-conducting oil pipes.

9. A gas heated compression foaming system according to claim 4, characterized in that: The heating mechanism is provided with two groups, and the two groups of the heating mechanism are respectively located at two sides of the device body, and the heating mechanism is respectively connected with two ends of the corresponding hot pressing plate.

10. A gas heated compression foaming system according to claim 4, characterized in that: The device body is provided with an air inlet, and the air inlet is connected to the second heat exchanger.

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