Indirect cooling mold temperature controller system for extruder film production

Abstract

The utility model relates to an indirect cooling mold temperature controller system used for extruder film production, the system comprises a mold temperature controller body, a cooling water loop, a pressurization loop and a medium loop, the cooling water loop, the pressurization loop and the medium loop are arranged in the mold temperature controller body, the cooling water loop is provided with a cold water tank used for storing soft water or pure water; the water tank cooling plate filter is arranged between the cooling water inlet and the cooling water outlet and is used for keeping medium water in the cold water tank in a normal temperature state; the medium side plate type exchanger is arranged between the cooling water outlet loops and is used for heating the flowing-in medium water; and the double heating cylinders are arranged on the medium loop, and the double heating cylinders control and heat the medium water input by the pressurization loop through heating pipes arranged in the double heating cylinders, temperature relays mounted on the surfaces of the double heating cylinders and single-floater liquid level switches arranged on the upper portions of the double heating cylinders. By adopting the indirect cooling mold temperature controller system, the requirement of ultrahigh-precision temperature control can be met.

Description

Technical Field

[0001] The utility model belongs to the field of new energy manufacturing, in particular to the field of cooling mold temperature controllers, and specifically refers to an indirect cooling mold temperature controller system for extruder film production. Background Art

[0002] In the new energy manufacturing sector, lithium battery separator production requires precise temperature control of rollers of varying specifications. Faced with the enormous loads generated by separator production, the solenoid valve temperature control of conventional injection molding mold temperature controllers, due to the impact and fluctuations of water flow, cannot meet the temperature control accuracy required for lithium battery production. Furthermore, before separator production, the separator rollers must be heated to a specific forming temperature. Furthermore, the rollers contain a large amount of water. To quickly heat the water and the rollers to forming temperature, manufacturers must equip steam boilers and supporting equipment such as steam pipelines. This requires high safety standards and a large initial investment. To meet the requirements of lithium battery separator production, which require high-power rapid heating, high-load cooling, high-flow media circulation, and ultra-high-precision temperature control, a temperature controller different from conventional injection molding temperature controllers is required. Furthermore, due to the copper and zinc prohibitions in lithium battery separator production, the temperature controller must use soft or pure water, which conventional temperature controllers without water tanks cannot meet. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide an indirect cooling mold temperature controller system for extruder film production.

[0004] In order to achieve the above-mentioned purpose, the utility model is an indirect cooling mold temperature controller system for extruder film production as follows:

[0005] The main features of the indirect cooling mold temperature controller system for extruder film production are that the system includes a mold temperature controller body, and a cooling water circuit, a boost circuit and a media circuit arranged inside the mold temperature controller body, wherein:

[0006] The cooling water circuit is provided with a cold water tank for storing soft water or pure water;

[0007] A water tank cooling plate filter is provided between the cooling water inlet and the cooling water outlet, and is used to keep the medium water inside the cold water tank at room temperature;

[0008] The media side plate exchanger provided between the cooling water outlet loops is used to heat the inflowing media water;

[0009] The dual heating cylinder is arranged on the media circuit, and the dual heating cylinder controls the heating of the media water input from the boosting circuit through the internally arranged heating tube, the surface-mounted temperature relay and the upper single float level switch.

[0010] Preferably, the system supplies soft water or pure water to the cold water tank through a water supply port, a ball valve, a filter and a float valve. A liquid level gauge is installed on the side of the cold water tank and a double float liquid level switch is installed inside. The double float liquid level switch is used to control the water tank liquid level, and a drain valve is installed at the bottom of the cold water tank.

[0011] Preferably, the media water flowing out of the cold water tank is replenished to the dual heating cylinder through a first branch path of a water replenishment pump provided on a water replenishment pipeline; a second branch path of the water replenishment pump returns to the cold water tank after heat exchange cooling treatment through the water tank cooling plate filter; and a pressure gauge, a check valve, a bypass flow regulating valve and an automatic control solenoid valve are also provided on the water replenishment pipeline.

[0012] Preferably, a temperature probe is installed on the front side of the media pump inlet of the media loop to feedback the temperature inside the dual heating cylinder; the temperature probe is connected to the media pump; the media pump pumps water from the dual heating cylinder through the pipeline to the roller, and the media water flows out of the roller and into the media side plate exchanger, and returns to the dual heating cylinder through heat exchange of the media side plate exchanger.

[0013] Preferably, the inlet end of the media side plate exchanger is equipped with a filter, and the outlet end is equipped with an electric proportional control valve. The media side plate exchanger adjusts the valve opening according to the temperature feedback of the temperature probe, so as to accurately control the amount of cooling water entering the media side plate exchanger and the temperature of the media entering the roller through the filter.

[0014] Preferably, a safety valve, a pressure gauge, and a bypass valve are installed at the outlet of the media outgoing main circuit pump; and a filter and a ball valve are also installed at the inlet of the media returning to the main circuit pump.

[0015] The indirect cooling mold temperature controller system used in the extruder film production system of the utility model adopts electric heating and indirect cooling. The machine is equipped with a high-power electric heater and a large-flow stainless steel plate heat exchanger to easily handle the heavy load of the film roller and accurately control the temperature. The mold temperature controller is equipped with a water tank for adding pure water or soft water, which is suitable for the high standards required for lithium battery diaphragm production. The machine has two water pumps: one for media circulation and temperature control between the machine and the film roller, and the other for water replenishment and pressurization of the media circulation. A second stainless steel plate heat exchanger is connected in series in the machine's pressurization and water replenishment circuit to cool the heat load generated by the water replenishment and booster pump body. An electric proportional control valve is installed at the cooling water outlet of the machine's main plate heat exchanger. The signal feedback from the temperature sensor installed in the main media circulation pipeline accurately and smoothly adjusts the cooling water flow of the main exchanger, achieving ultra-high-precision temperature control of the heavy-load film roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the indirect cooling mold temperature controller system for extruder film production according to the present invention.

[0017] Reference numerals

[0018] 1 Liquid level gauge

[0019] 2 cold water tanks

[0020] 3 Double float level switch

[0021] 4 Float valve

[0022] 5 Filters

[0023] 6 ball valve

[0024] 7. Stop valve

[0025] 8. Water supply pump

[0026] 9 Water tank cooling plate filter

[0027] 10. Pressure gauge

[0028] 11 Check valve

[0029] 12 Temperature relay

[0030] 13 Heating tube

[0031] 14 Temperature probe

[0032] 15 Media Pump

[0033] 16 Single float level switch

[0034] 17 Automatic control solenoid valve

[0035] 18 media side plate exchanger

[0036] 19 Electric proportional control valve

[0037] 20 Safety valve

[0038] 21 Double heating cartridge DETAILED DESCRIPTION

[0039] In order to more clearly describe the technical content of the present invention, further description will be given below in conjunction with specific embodiments.

[0040] Before describing in detail the embodiments of the present invention, it should be noted that, hereinafter, the terms "comprises", "comprising" or any other variations are intended to cover non-exclusive inclusion, whereby a process, method, article or apparatus comprising a series of elements includes not only these elements, but also other elements not expressly listed or inherent to such process, method, article or apparatus.

[0041] See also Figure 1 As shown, the indirect cooling mold temperature controller system for extruder film production of the present invention includes a mold temperature controller body, and a cooling water circuit, a boost circuit and a media circuit arranged inside the mold temperature controller body, wherein,

[0042] The cooling water circuit is provided with a cold water tank 2 for storing soft water or pure water;

[0043] A water tank cooling plate filter 9 is provided between the cooling water inlet and the cooling water outlet to keep the medium water inside the cold water tank 2 at room temperature;

[0044] The media side plate exchanger 18 provided between the cooling water outlet circuits is used to heat the inflowing media water;

[0045] The dual heating cylinder 21 provided on the media circuit controls and heats the media water inputted from the boosting circuit through the internally provided heating tube 13, the surface-mounted temperature relay 12 and the upperly provided single float level switch 16.

[0046] As a preferred embodiment of the present utility model, the system supplies soft water or pure water to the cold water tank 2 through the water supply port through the ball valve 6, the filter 5 and the float valve 4. The water tank side of the cold water tank 2 is equipped with a liquid level gauge 1, and a double float liquid level switch 3 is installed inside. The double float liquid level switch 3 is used to control the water tank level, and a stop valve 7 is installed at the bottom of the cold water tank 2.

[0047] As a preferred embodiment of the present utility model, the media water flowing out of the cold water tank 2 is replenished to the dual heating cylinder 21 through the first branch path of the water replenishment pump 8 provided on the water replenishment pipeline; the second branch path of the water replenishment pump 8 returns to the cold water tank 2 after heat exchange cooling treatment through the water tank cooling plate filter 9; and the water replenishment pipeline is also provided with a pressure gauge 10, a check valve 11, a stop valve 7 and an automatic control solenoid valve 17.

[0048] As a preferred embodiment of the present invention, a temperature probe 14 is installed on the front side of the media pump inlet of the media loop to feedback the temperature inside the dual heating cylinder 21; the temperature probe 14 is connected to the media pump 15; the media pump 15 pumps water from the dual heating cylinder 21 through the pipeline to the roller, and the media water flows out of the roller and into the media side plate exchanger 18, and returns to the dual heating cylinder 21 through heat exchange in the media side plate exchanger 18.

[0049] As a preferred embodiment of the present invention, the inlet end of the media side plate exchanger 18 is equipped with a filter 5, and the outlet end is equipped with an electric proportional control valve 19. The media side plate exchanger 18 adjusts the valve opening according to the temperature feedback of the temperature probe 14, thereby accurately controlling the amount of cooling water entering the media side plate exchanger 18 and the temperature of the media entering the roller through the filter.

[0050] As a preferred embodiment of the present invention, a safety valve 20, a pressure gauge 10, and a stop valve 7 are installed at the outlet of the media main circuit pump; a filter 5 and a ball valve 6 are also installed at the media return port of the main circuit pump.

[0051] As a preferred embodiment of the present invention, the stop valve 7 is installed on the water tank side for drainage, installed between the media outlet and the media return for bypass flow regulation, and installed between the solenoid valve 17 and the water tank 2 for manual regulation.

[0052] In actual application, the operation mode of this technical solution using roller temperature control to indirectly cool the mold temperature controller is as follows:

[0053] Soft water or pure water is supplied to the cold water tank 2 from the water supply port through the ball valve 6, filter 5, and float valve 4. A liquid level gauge is installed on the side of the water tank, and a double float liquid level switch 3 is installed in the water tank to control the liquid level of the water tank. A drain valve is installed at the bottom of the water tank. During operation, the water supply pump 8 supplies water to the media circulation heating cylinder. At the same time, the water supply pump branches out to pass through the water tank cooling plate filter 9 for heat exchange with the external cooling water, and returns to the cold water tank 2 after heat exchange and cooling. A pressure gauge 10, a check valve 11 and a bypass flow regulating valve 7 are installed in the water supply pipeline.

[0054] Media circulation part of the mold temperature controller: the media pump 15 pumps water from the double heating cylinder 21 through the pipeline to the roller (mold). The media water flows out of the roller and flows into the media side plate exchanger 18. After heat exchange in the plate exchanger, it returns to the double heating cylinder 21. The heating cylinder is equipped with a heating pipe 13, and the surface of the heating cylinder is equipped with a temperature relay 12. The upper part of the heating cylinder is equipped with a single float liquid level switch 16. The water supply and exhaust pipeline of the machine is equipped with a manual regulating valve 7 and an automatic control solenoid valve 17. The outlet of the media main circuit pump is equipped with a safety valve 20, a pressure gauge 10, a stop valve 7, and the media return is equipped with a filter 5.

[0055] The machine cooling water pipeline is divided into two routes. One route enters the media heat exchange plate exchanger 18. A filter 5 is installed at the inlet end of the media heat exchange plate exchanger 18, and an electric proportional control valve 19 is installed at the outlet end of the media heat exchange plate exchanger 18. The valve opening is adjusted based on the temperature feedback from the temperature probe 14 installed in front of the media pump inlet, accurately controlling the amount of cooling water entering the media heat exchange plate exchanger 18, thereby precisely controlling the temperature of the media entering the roller. The other route of cooling water passes through the filter 5 and enters the water tank cooling plate exchanger to balance the heat load generated by the water supply pump. A manual valve is installed on the cooling water pipeline to control the amount of water entering the exchanger.

[0056] This indirect cooling mold temperature controller system for extruder film production has the following technical advantages:

[0057] (1) The structure with a water tank can use soft water or pure water. The water does not contain metal ions and other impurities, meeting the copper and zinc ban requirements required for the production of lithium battery separators.

[0058] (2) Plate exchanger is used for indirect cooling, and electric proportional control valve is used for temperature control, with a temperature control accuracy of up to ±0.1℃.

[0059] (3) By connecting multiple high-power heating tubes in series, taking a 100KW heating tube as an example, the capital investment of a 100KW boiler with the same power can be saved, and the safety hazards of using the boiler can be avoided.

[0060] (4) The built-in water supply booster pump will not cause instantaneous water outage, maintaining continuous and stable production of the factory.

[0061] (5) The built-in water tank cools the plate exchanger to keep the water tank at room temperature and avoid overheating and damage to the water supply pump.

[0062] (6) This machine is equipped with a large-sized plate exchanger and a large-flow media circulation pump. The media flow rate through the roller can reach up to 600L / min.

[0063] (7) Because a control solenoid valve is installed on the return side of the media water supply and exhaust pipeline, the media with a large flow rate can be heated to 120℃.

[0064] At the same time, the special structural features of the new energy battery diaphragm production mold temperature controller are as follows:

[0065] (1) Double water pump operation, the internal circulation pump adopts a low-power water pump for water replenishment and pressurization of the media external circulation, and the media pump 15 is used for the circulation temperature control of the mold temperature controller body and the external roller. A high-power multi-stage centrifugal pump is used to ensure a certain large flow rate (600L / min) required for precise temperature control of the roller.

[0066] (2) Double plate heat exchanger configuration: the small plate heat exchanger is used to balance the heat load generated by the internal circulation boost, and the large plate heat exchanger is used to cool the large amount of heat load generated by the diaphragm roller (the heat load can be as high as 60-90KW). Due to the indirect heat exchange using the plate exchanger, the circulating temperature control medium can use pure water or soft water, and is not contaminated by impurities in the external cooling water.

[0067] (3) The machine is equipped with an automatic control solenoid valve 17 and an electric proportional control valve 19 for temperature control and regulation. The automatic control solenoid valve 17 is installed on the connection side between the heating cylinder and the water tank. It is normally closed during operation. In this way, the internal circulation pump increases the pressure of the heating cylinder and the external circulation pipeline when the media circulation pressure is higher than 2.0kgf / cm 2 The maximum operating temperature of the mold temperature controller can reach 120℃. The electric proportional control valve 19 is installed on the media circulation cooling water pipeline. The maximum size is DN50 (2 inches). The cooling water flow rate can reach about 15m 3 / Hr, with a cooling capacity of up to 90KW (at cooling water temperature of 15°C). Based on the temperature signal feedback provided by the temperature probe platinum thermocouple Pt100, the switching amount of the cooling water valve is proportionally adjusted to accurately control the roller media circulation temperature to the set temperature of ±0.1°C.

[0068] (4) The machine adopts a double heating tube configuration. According to the rapid heating requirements of the roller, the heating tube power can be 30KW+30KW=60KW, 40KW+40KW=80KW, 50KW+50KW=100KW and other different specifications to meet the rapid heating requirements of replacing the boiler.

[0069] (5) The machine has a built-in large-capacity pure water tank, which is used to replenish water for the rollers in the production of lithium battery films and to control the temperature circulation of the media. Pure water or soft water can be added to the water tank, which does not contain copper, zinc and other metal ions that are harmful to lithium batteries, to ensure the high quality of lithium battery separators.

[0070] The indirect cooling mold temperature controller system used in the extruder film production system of the utility model adopts electric heating and indirect cooling. The machine is equipped with a high-power electric heater and a large-flow stainless steel plate heat exchanger to easily handle the heavy load of the film roller and accurately control the temperature. The mold temperature controller is equipped with a water tank for adding pure water or soft water, which is suitable for the high standards required for lithium battery diaphragm production. The machine has two water pumps: one for media circulation and temperature control between the machine and the film roller, and the other for water replenishment and pressurization of the media circulation. A second stainless steel plate heat exchanger is connected in series in the machine's pressurization and water replenishment circuit to cool the heat load generated by the water replenishment and booster pump body. An electric proportional control valve is installed at the cooling water outlet of the machine's main plate heat exchanger. The signal feedback from the temperature sensor installed in the main media circulation pipeline accurately and smoothly adjusts the cooling water flow of the main exchanger, achieving ultra-high-precision temperature control of the heavy-load film roller.

[0071] In this specification, the present invention has been described with reference to specific embodiments thereof. However, it will be apparent that various modifications and variations may be made without departing from the spirit and scope of the present invention. Accordingly, the specification and drawings are to be regarded as illustrative rather than restrictive.

Claims

1. An indirect cooling mold temperature controller system for extruder film production, characterized in that: The system includes a mold temperature controller body, and a cooling water circuit, a boost circuit, and a media circuit arranged inside the mold temperature controller body, wherein: The cooling water circuit is provided with a cold water tank (2) for storing soft water or pure water; A water tank cooling plate filter (9) is provided between the cooling water inlet and the cooling water outlet, and is used to keep the medium water inside the cold water tank (2) at a normal temperature; A media side plate exchanger (18) provided between the cooling water outlet loops is used to heat the inflowing media water; A double heating cylinder (21) is provided on the media circuit. The double heating cylinder (21) controls and heats the media water inputted from the boosting circuit through an internally provided heating tube (13), a surface-mounted temperature relay (12), and an upper-mounted single float level switch (16).

2. The indirect cooling mold temperature controller system for extruder film production according to claim 1, characterized in that: The system supplies soft water or pure water to the cold water tank (2) through a water supply port via a ball valve (6), a filter (5) and a float valve (4). The cold water tank (2) is provided with a level gauge (1) on the side of the water tank and a double float level switch (3) inside. The double float level switch (3) is used to control the liquid level in the water tank. A stop valve (7) is provided at the bottom of the cold water tank (2). The stop valve (7) is used for drainage.

3. The indirect cooling mold temperature controller system for extruder film production according to claim 2, characterized in that: The medium water flowing out of the cold water tank (2) is supplied to the dual heating cylinder (21) via a first branch path of a water supply pump (8) provided on the water supply pipeline; a second branch path of the water supply pump (8) is returned to the cold water tank (2) after heat exchange cooling treatment through the water tank cooling plate filter (9); and a pressure gauge (10), a check valve (11), a stop valve (7) and an automatic control solenoid valve (17) are also provided on the water supply pipeline, and the stop valve (7) is used for bypass flow regulation.

4. The indirect cooling mold temperature controller system for extruder film production according to claim 1, characterized in that: The media loop is provided with a temperature probe (14) at the front side of the media pump inlet for feeding back the temperature inside the dual heating cylinder (21); the temperature probe (14) is connected to the media pump (15); the media pump (15) pumps water from the dual heating cylinder (21) through a pipeline to the roller, and the media water flows out of the roller and into the media side plate exchanger (18), and then returns to the dual heating cylinder (21) through heat exchange in the media side plate exchanger (18).

5. The indirect cooling mold temperature controller system for extruder film production according to claim 4, characterized in that: The inlet end of the media side plate exchanger (18) is equipped with a filter (5), and the outlet end is equipped with an electric proportional control valve (19). The media side plate exchanger (18) adjusts the valve opening according to the temperature feedback of the temperature probe (14), thereby accurately controlling the amount of cooling water entering the media side plate exchanger (18) and the temperature of the media entering the roller through the filter.

6. The indirect cooling mold temperature controller system for extruder film production according to claim 4, characterized in that: A safety valve (20), a pressure gauge (10), and a stop valve (7) are installed at the outlet of the medium main circuit pump; a filter (5) and a ball valve (6) are also installed at the outlet of the medium main circuit pump.

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