Heating device for gel casting

Abstract

The utility model discloses a heating device for gel casting, which relates to the field of gel casting technology and comprises a first shell, a second shell, a rectangular positioning platform, a storage device, a first control unit, a second control unit, a first water pump and a second water pump. The mold is placed in the heating device through a rectangular positioning platform, a first cavity is defined by the first shell and the mold, a second cavity is defined by the first shell and the second shell, and a heating medium is contained in the cavities; the heating medium is circularly controlled and heated through the control unit and the heating device, and the purpose of temperature control is achieved. According to the utility model, the slurry curing time can be shortened, and the process time consumption is reduced; the positioning system for the heating mold is provided, the mold is fixed, and the problems that in the heating process, due to mold automation, heating is uneven, and a heating medium easily enters a slurry cavity are solved; the heating device can be connected with a plurality of dies in the die, so that the effect of simultaneously heating the plurality of dies is achieved, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of hot forming, and more specifically, relates to a heating device for injection casting forming. Background Art

[0002] The injection casting forming process is mainly used to combine ceramic technology with organic polymer chemistry, and ingeniously introduce the method of polymerizing high molecular monomers into the ceramic forming process. By preparing a ceramic slurry with low viscosity and high solid content, a ceramic blank with high strength, high density and good uniformity can be formed with net dimensions. The process includes mold combination → adding slurry → waiting for the slurry to undergo in-situ curing reaction → demolding → the mold enters the drying furnace for drying and debinding → machining → sintering. During the heating process of the traditional injection casting forming process, the in-situ curing time period is too long, often requiring 6 - 8 hours. Such a long time period is difficult to achieve industrial-scale production. During the process of sending the green body to the drying furnace, the green body is likely to be damaged due to excessive water content and insufficient strength. When injecting and casting some powders, the strength of the green body formed by the in-situ curing reaction is not enough to demold, resulting in difficult demolding or inability to prepare, which greatly restricts the diversified development of the injection casting forming industry. The heating device is generally designed such that the internal and external media of the mold are immersed in the same heating medium, but due to different heating areas, it is easy to cause uneven heating inside and outside. The temperature difference between the inner mold and the outer mold is too large, which easily leads to differences in the in-situ curing reaction time of the slurry and uneven dehydration and debinding, resulting in defects such as cracks.

[0003] The utility model with the publication number CN218195893U discloses a heating device for injection casting forming, including a first housing, a first pump body and a control unit; the first housing is sleeved outside the mold, and a first cavity for containing a first heating medium is formed between the first housing and the mold; the mold itself forms a second cavity for containing the first heating medium, and the opening of the second cavity is higher than the liquid level of the first heating medium in the first cavity; the first pump body can pump the first heating medium in the first cavity into the second cavity through a first pipeline; the control unit is connected to the first pump body; this device is only used to prepare solid devices, and there is no positioning system when preparing devices, which is easy to shake during the preparation process, thus affecting the quality of the green body, and it is only used for single mold heating and cannot achieve multi-mold heating. Summary of the Utility Model

[0004] In order to solve the problems of uneven heating, easy shaking due to lack of positioning during mold heating, and inability to perform multi-mold heating, etc., the utility model provides a heating device for injection casting forming.

[0005] The solution of the present utility model is: a heating device for injection molding, which is used to heat an injection molding die, and includes a first housing, a second housing, a rectangular positioning platform, a reservoir, a first control unit, a second control unit, a first water pump, and a second water pump; the rectangular positioning platform is provided with a circular opening, and the circular opening is adapted to the side protrusion of the die; the circular opening is divided into upper and lower parts, the upper part is a circular cavity, and the lower part is a cylinder that penetrates the rectangular positioning platform and has a radius larger than the die and smaller than the circular cavity; the die is fixed within this circular opening; the first housing and the outer wall of the die enclose a first cavity, and the first housing and the second housing enclose a second cavity; the rectangular positioning platform is hermetically connected to the first housing and the second housing; the first cavity is connected to the reservoir through a first pipeline, and the first water pump is installed within the first pipeline; the reservoir is connected to the die within the die through a second pipeline, and the second water pump is installed within the second pipeline; the first control unit is connected to the first water pump; the second control unit is connected to the second water pump.

[0006] Further, a heater is installed on the surface of the first housing.

[0007] Further, the second pipeline includes a rigid pipe portion and a flexible pipe portion, one end of the flexible pipe portion is connected to the reservoir, and the other end is a split opening.

[0008] Further, the first cavity is filled with a first heating medium; the second cavity is filled with a second heating medium.

[0009] Further, a temperature detector is installed on the die, the temperature detector is connected to a temperature difference detector, the temperature difference detector is connected to a temperature transmitter, and the temperature transmitter is connected to the second control unit.

[0010] Further, a flow meter is provided within the second pipeline, the flow meter is connected to a flow transmitter, and the flow transmitter is connected to the second control unit.

[0011] Further, a water level pressure gauge is provided on the reservoir, the water level pressure gauge is connected to a frequency converter, and the frequency converter is connected to the first control unit.

[0012] Further, the rectangular positioning platform is provided with a handle and an opening for placing the die.

[0013] Further, the first control unit and the second control unit are PID processors.

[0014] Preferably, the heater is a PTC heater.

[0015] Based on the above heating device for injection molding, it includes the following steps:

[0016] S1. Before use, unlock the latch. After removing the rectangular positioning table, add the first heating medium to the first cavity, heat the second heating medium in the second cavity, and then lock the rectangular positioning platform and the second housing with the latch.

[0017] S2. Start the heater for heating.

[0018] S3. First, perform preheating treatment on the cavity. During this period, the heater heats the first heating medium in the first cavity, and the second heating medium in the second cavity is heated by the heat transferred from the first housing wall to the first cavity, so as to achieve the effect of heat preservation.

[0019] S4. After preheating is completed, start heating and perform gradient heating of the temperature in sequence. The time for each gradient is set according to the actual situation. In actual application, when heating the slurry, it can optimize the melting, flow, and solidification processes of the slurry, thereby improving the quality of the final product.

[0020] S5. During the heating process, when there is a temperature difference between the inner and outer molds, the temperature difference detector will emit a signal. After being converted by the temperature transmitter, the second control unit controls the second water pump to press the first heating medium in the storage tank into the second pipeline for circulation. When the flowmeter measures that the circulation flow is sufficient, the flow transmitter emits a signal to the second control unit, and the second control unit controls the second water pump to stop working, realizing the adjustment of the temperature.

[0021] S6. After heating is completed, turn off the heater. Operate the first control unit and the second control unit to transmit instructions to the first water pump and the second water pump respectively, and the two cooperate to circulate the flow in the cavity to reduce the temperature in the cavity. Then, through the cavity temperature monitored in real time by the temperature measuring device, when the temperature drops to room temperature, turn off the temperature measuring device, temperature difference detector, temperature transmitter, flowmeter, flow transmitter, frequency converter, first water pump, second water pump, first control unit, and second control unit.

[0022] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0023] The present utility model proposes a positioning system for a mold used for heating. The mold is fixed, preventing problems such as uneven heating caused by the automatic movement of the mold during heating, poor green body strength, and easy entry of the heating medium into the slurry cavity. In the present utility model, the second pipeline is connected to the storage tank by a hose, and the hose is designed with an open split flow, which can be connected to the inner molds of multiple molds, achieving the effect of simultaneously heating multiple molds and improving production efficiency. Description of the Drawings

[0024] Figure 1 It is a front view of a heating device for injection molding

[0025] Figure 2It is a front view sectional structure schematic diagram of a heating device mold for injection molding

[0026] 1. First cavity, 2. Second cavity, 3. First channel opening, 4. First pipeline, 5. Reservoir, 6. Water level pressure gauge, 7. Second pipeline, 8. Flowmeter, 9. Rectangular positioning platform handle, 10. Heater, 11. Temperature difference detector, 12. Temperature transmitter, 13. First water pump, 14. Frequency converter, 15. Second water pump, 16. Rectangular positioning platform circulation channel opening, 17. Rectangular positioning platform, 18. First housing, 19. Second housing, 20. Second pipeline channel opening, 21. Lock, 22. Cavity, 23. Flow transmitter, 24. First control unit, 25. Second control unit, 26. Temperature measurer, 27. Mold schematic Specific implementation mode

[0027] To clearly illustrate the technical features of this solution, the following will elaborate on the present utility model in detail through specific embodiments and in conjunction with its attached drawings. In the following description, numerous specific details are set forth to facilitate a full understanding of this application. However, this application can also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited by the specific embodiments disclosed below. Additionally, in the description of this application, it should be understood that terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality" means two or more, unless otherwise specifically defined. In this application, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances. In this application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. In the description of this specification, descriptions referring to terms such as "an embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0028] Embodiment 1

[0029] Please refer to Figure 1, an embodiment provided by the present utility model: a device for injection molding heating, including a first housing 18, a second housing 19, a rectangular positioning platform 17, a reservoir 5, a first control unit 24, a second control unit 25, a first water pump 13, and a second water pump 15. The first housing 18 and the mold form a first cavity 1 for storing a first heating medium, and the first housing 18 and the second housing 19 form a second cavity 2 for storing a second heating medium; the heaters 10 are distributed on the inner surface of the first housing 18; the temperature sensors 26 are located on the outer surface of the outer mold and the inner wall of the inner mold; the flow meter 8 is located in the second pipe 7; the second pipe 7 connects the memory 5 with the inner mold of the mold; the memory 5 contains a water level pressure gauge 6; the second water pump 15 acts on the second pipe 7; the first water pump 13 acts on the first pipe 4; the first pipe 4 connects the first cavity 1 and the memory 5.

[0030] Specifically, the mold includes an inner mold and an outer mold, and the inner mold is disposed inside the outer mold; there are two temperature sensors 26 distributed on the inner walls of the upper and lower directions of the inner mold, and four are respectively distributed at the front, rear, left, and right positions of the outer mold; the first cavity 1 is formed by the mold and the first housing; the second cavity 2 is formed by the first housing 18 and the second housing 19. Before use, first unlock the lock 21, remove the rectangular positioning table 17, then add the first heating medium to the first cavity 1, add the second heating medium to the second cavity 2, and then lock the rectangular positioning platform 17 and the second housing 19 with the lock 21. As another alternative, the first heating medium and the second heating medium can also be added by opening an opening on the rectangular positioning table and using devices such as a conduit and a pump body. Start the heater 10, temperature sensor 26, temperature difference detector 11, temperature transmitter 12, flowmeter 8, flow transmitter 23, frequency converter 14, first water pump 13, second water pump 15, first control unit 24, and second control unit 25, and first perform a preheating treatment at 40 degrees Celsius. During the preheating process, the heater 10 heats the first heating medium in the first cavity 1, and the second heating medium in the second cavity 2 is heated by the heat transferred from the wall of the first housing 18 to the first cavity 1, so as to achieve the effect of heat preservation; after preheating, the slurry is injected unilaterally through the upper opening of the inner cavity of the mold, and gradient heating of the temperature is carried out in sequence, 20 minutes for each gradient, to optimize the in-situ curing reaction and dehydration and degreasing process of the slurry, thereby improving the quality of the final product; during the heating process, the temperature sensor 26 monitors the heating temperature of each part of the mold in real time and transmits the signal to the second control unit 25 through the temperature difference detector 11 and the temperature transmitter 12, and controls the operation of the second water pump 15 to make the temperature difference between the inner and outer molds lower than 0.1 degrees Celsius; circular holes are opened at the centers of the bottoms of the first housing 18 and the second housing 19, and they are connected to the storage tank 5 through the first pipeline 4. A water level pressure gauge 6 is provided in the storage tank 5. The frequency converter 14 is connected to the first control unit 24, and the first control unit 24 is connected to the first water pump 13; when the water surface in the container is lower than the water level pressure gauge 6, the frequency converter 14 receives the signal from the water level pressure gauge 6, converts and transmits the signal to the first control unit 24, and the first control unit 24 will control the first water pump 13 to press the first heating medium into the water storage tank until the water surface covers the water level pressure gauge 6. When the water level covers the water level pressure gauge 6, the first water pump 13 stops working.The temperature difference detector 11 is connected to the internal and external temperature measuring device 26 of the mold and is also connected to the temperature transmitter 12. The temperature transmitter 12 is connected to the second control unit 25, and the second control unit 25 is connected to the second water pump 15. When there is a temperature difference between the inner and outer molds, the temperature difference detector 11 measures the temperature difference and calculates the required flow rate to emit a signal. After being converted by the temperature transmitter 12, the signal is transmitted to the second control unit 25. The second control unit 25 controls the second water pump 15 to press the first heating medium in the reservoir 5 into the second pipeline 7 for circulation. A flow meter 8 is provided in the second pipeline 7. The flow meter 8 is connected to the flow transmitter 23, and the flow transmitter 23 is connected to the second control unit 25. When the flow meter 8 measures that the circulating flow rate reaches the required flow rate value calculated by the temperature difference detector 11, the flow transmitter 23 emits a signal to the second control unit 25, and the second control unit 25 controls the second water pump 15 to stop working. The above various components are combined together to form an efficient, precise, and automated closed-loop control system to achieve precise temperature control. There are four heaters 10, which are evenly distributed at the centers of the front, rear, left, and right faces of the first cavity 1. Multiple heaters 10 work simultaneously, which can accelerate the overall heating speed, improve production efficiency, reduce the temperature gradient, and prevent local overheating. The second control unit 25 obtains information from the temperature transmitter 12 and the flow transmitter 23, and then controls the water pumping volume of the second water pump 15 and the heating power of the heaters 10. The temperature difference between the hollow interior and the exterior of the mold is adjusted to be less than 0.1 degree Celsius, so that the mold is heated evenly and the solidification speed of the slurry is the same in all directions.

[0031] Embodiment 2

[0032] Please refer to Figure 1 , an embodiment provided by the present utility model: A device for heating in injection molding includes a first housing 18, a second housing 19, a rectangular positioning platform 17, a reservoir 5, a first control unit 24, a second control unit 25, a first water pump 13, and a second water pump 15.

[0033] The first housing 18 and the mold form a first cavity 1 for storing the first heating medium, and the first housing 18 and the second housing 19 form a second cavity 2 for storing the second heating medium. The heaters 10 are distributed on the inner surface of the first housing. The temperature measuring device is located on the outer surface of the outer mold and inside the inner mold. The flow meter 8 is located in the second pipeline 7. The second pipeline 7 connects the memory 5 with the inner mold of the mold. The memory 5 contains a water level pressure gauge 6. The second water pump 15 acts on the second pipeline 7. The first water pump 13 acts on the first pipeline 4. The first pipeline 4 connects the first cavity 1 and the reservoir 5.

[0034] Specifically, the first housing 18 and the mold form a first cavity 1 for storing a first heating medium, and the first housing 18 and the second housing 19 form a second cavity 2 for storing a second heating medium. The first heating medium is water, and the second heating medium is oil to achieve different heating requirements and temperature control. The mold includes an inner mold and an outer mold, and the inner mold is disposed inside the outer mold. Temperature sensors 26 are distributed at the center of the upper and lower molds and at the four positions of the front, rear, left, and right of the outer mold to monitor and adjust the humidity inside the mold. Before use, the first heating medium water is added to the first cavity 1 through the rectangular positioning table, and the second heating medium oil is heated in the second cavity 2. Start the heater 10, temperature sensor 26, temperature difference detector 11, temperature transmitter 12, flowmeter 8, flow transmitter 23, frequency converter 14, first water pump 13, second water pump 15, first control unit 24, and second control unit 25;

[0035] Further, the heater 10 includes a heating device and a heat exchanger, and the temperature measurer 26 includes a temperature measuring device and a humidity controller. During the preheating process, the heating device heats the water in the first cavity 1, and the oil in the second cavity 2 exchanges heat with the first cavity 1 through the heat exchanger, achieving more efficient heating and temperature control. After preheating, the slurry is injected unidirectionally through the upper opening of the inner cavity of the mold, and gradient heating of the temperature is carried out in sequence, with each gradient lasting for 20 minutes. At the same time, the humidity controller adjusts the humidity inside the mold to optimize the melting, flow, and curing processes of the slurry, improving the quality of the final product. During the heating process, the temperature measuring device monitors the heating temperature of each part of the mold in real time, and the humidity controller monitors the humidity inside the mold. Circular holes are opened at the centers of the bottoms of the first housing 18 and the second housing 19, and the circular holes are externally connected to pipes and connected to the reservoir 5. A water level pressure gauge 6 is provided in the reservoir 5. The frequency converter 14 is connected to the first control unit 24, and the first control unit 24 is connected to the first water pump 13 to realize an automatic water replenishment system. The temperature difference detector 11 is connected to the temperature measurers 26 inside and outside the mold and is connected to the temperature transmitter 12. The temperature transmitter 12 is connected to the second control unit 25, and the second control unit 25 is connected to the second water pump 15. When there is a temperature difference between the inner and outer molds, the temperature difference detector 11 emits a signal. After being converted by the temperature transmitter 12, the second control unit 25 controls the second water pump 15 to pump the water in the reservoir 5 into the second pipe 7 for circulation. The circulation flow rate is monitored through the flow meter 8 and the flow transmitter 23 to achieve precise temperature control. The heaters 10 are evenly distributed at the centers of the front, back, left, and right four faces of the first housing 18 to improve the heating efficiency and temperature uniformity. The second water pump 15 pumps the water in the first cavity 1 into the first cavity 1 surrounded by the upper mold to control and regulate the circulating liquid, maintaining the thermal balance and temperature uniformity of the system, and improving the heating efficiency and reliability of the system. The second control unit 25 obtains information from the temperature transmitter 12 and the flow transmitter 23, controls the water pumping volume of the second water pump 15 and the heating power of the heater 10, and adjusts the temperature difference between the hollow inside and the outside of the mold to be less than 0.1 degree Celsius, making the mold heated evenly and the curing speed of the slurry consistent in all directions.

[0036] Embodiment 3

[0037] Please refer to Figure 1, an embodiment provided by the present utility model: a device for injection molding heating, comprising a first housing 18, a second housing 19, a rectangular positioning platform 17, a reservoir 5, a first control unit 24, a second control unit 25, a first water pump 13, and a second water pump 15. The first housing 18 and the mold form a first cavity 1 for storing a first heating medium, and the first housing 18 and the second housing 19 form a second cavity 2 for storing a second heating medium; the heaters 10 are distributed on the inner surface of the first housing 18; the temperature measuring device is located on the outer surface of the outer mold and the inner wall of the inner mold; the flow meter 8 is located in the second pipe 7; the second pipe 7 connects the memory 5 with the inner mold of the mold; the memory 5 contains a water level pressure gauge 6; the second water pump 15 acts on the second pipe 7; the first water pump 13 acts on the first pipe 4; the first pipe 4 connects the first cavity 1 and the memory 5.

[0038] Further, the second pipe includes a rigid pipe portion and a flexible pipe portion. One end of the flexible pipe portion is connected to the reservoir, and the other end is provided with a split opening. A valve is provided at the opening end, and the ends of the valve are respectively connected to the inner molds of two molds. Both molds are provided with a temperature control system. When there is a temperature difference between the inner and outer molds of one of the molds, the corresponding mold valve is opened, and the controller adjusts this mold.

[0039] Specifically, the molds all include an inner mold and an outer mold, and the inner mold is arranged inside the outer mold; there are two temperature sensors 26 distributed on the inner walls in the upper and lower directions of the inner mold, and four are respectively distributed at the four positions of the front, rear, left, and right of the outer mold; the first cavity 1 is formed by the mold and the first shell; the second cavity 2 is formed by the first shell 18 and the second shell 19. Before use, first unlock the lock 21, remove the rectangular positioning table 17, then add the first heating medium to the first cavity 1, add the second heating medium to the second cavity 2, and then lock the rectangular positioning platform 17 and the second shell 19 with the lock 21. As another alternative solution, the first heating medium and the second heating medium can also be added by opening an opening on the rectangular positioning table and using devices such as conduits and pumps. Start the heater 10, temperature sensor 26, temperature difference detector 11, temperature transmitter 12, flowmeter 8, flow transmitter 23, frequency converter 14, first water pump 13, second water pump 15, first control unit 24, and second control unit 25, and first perform a preheating treatment at 40 degrees Celsius. During the preheating process, the heater 10 heats the first heating medium in the first cavity 1, and the second heating medium in the second cavity 2 is heated by the heat transferred from the wall of the first shell 18 to the first cavity 1, so as to achieve the effect of heat preservation; after the preheating is completed, the slurry is injected unilaterally through the upper opening of the inner cavity of the mold, and gradient heating of the temperature is carried out in sequence, 20 minutes for each gradient, to optimize the in-situ curing reaction and dehydration and degreasing process of the slurry, thereby improving the quality of the final product; during the heating process, the temperature sensor 26 monitors the heating temperature of each part of the mold in real time and transmits the signal to the second control unit 25 through the temperature difference detector 11 and the temperature transmitter 12, and controls the operation of the second water pump 15 to make the temperature difference between the inner and outer molds lower than 0.1 degree Celsius; circular holes are opened at the centers of the bottoms of the first shell 18 and the second shell 19, and the circular holes are externally connected to pipes and connected to the reservoir 5. A water level pressure gauge 6 is arranged in the reservoir 5. The frequency converter 14 is connected to the first control unit 24, and the first control unit 24 is connected to the first water pump 13; when the water surface in the container is lower than the water level pressure gauge 6, the frequency converter 14 receives the signal from the water level pressure gauge 6, converts it and transmits the signal to the first control unit 24, and the first control unit 24 will control the first water pump 13 to press the first heating medium into the water storage device until the water surface covers the water level pressure gauge 6. When the water level covers the water level pressure gauge 6, the first water pump 13 stops working.The temperature difference detector 11 is connected to the internal and external temperature measuring device 26 of the mold and is also connected to the temperature transmitter 12. The temperature transmitter 12 is connected to the second control unit 25, and the second control unit 25 is connected to the second water pump 15. When there is a temperature difference between the inner and outer molds, the temperature difference detector 11 emits a signal. After being converted by the temperature transmitter 12, the second control unit 25 controls the second water pump 15 to press the first heating medium in the reservoir 5 into the second pipeline 7 for circulation. A flow meter 8 is provided in the second pipeline 7. The flow meter 8 is connected to the flow transmitter 23, and the flow transmitter 23 is connected to the second control unit 25. The flow transmitter 23 emits a signal to the second control unit 25, and the second control unit 25 controls the second water pump 15 to stop working. The above various components are combined together to form an efficient, accurate, and automated closed-loop control system to achieve precise temperature control. There are four heaters 10, and they are evenly distributed at the centers of the front, rear, left, and right faces of the first cavity 1. Multiple heaters 10 work simultaneously, which can accelerate the overall heating speed, improve production efficiency, reduce the temperature gradient, and prevent local overheating. The second water pump 15 pumps the water in the first cavity 1 into the first cavity surrounded by the upper mold, so as to control and regulate the circulating liquid, maintain the thermal balance and temperature uniformity of the system, and improve the heating efficiency and reliability of the system. The second control unit 25 obtains information from the temperature transmitter 12 and the flow transmitter 23, and then controls the water pumping volume of the second water pump 15 and the heating power of the heaters 10. The temperature difference between the hollow interior and the exterior of the mold is adjusted to be less than 0.1 degree Celsius, so that the mold is heated evenly and the solidification speed of the slurry is the same in all directions.

Claims

1. A heating device for injection molding, characterized in that: Used for heating the injection molding mold, comprising a first shell, a second shell, a rectangular positioning platform, a storage device, a first control unit, a second control unit, a first water pump, and a second water pump; The rectangular positioning platform is provided with a circular opening, which is matched with the protrusion on the side of the mold; the circular opening is divided into an upper and lower part, the upper part is a circular cavity, and the lower part is a cylinder that passes through the rectangular positioning platform and has a radius larger than the mold and smaller than the circular cavity; the mold is fixed in the circular opening; The first shell and the outer wall of the mold form a first cavity, and the first shell and the second shell form a second cavity; The rectangular positioning platform is sealed and connected to the first shell and the second shell; The first cavity is connected to the reservoir through a first pipeline, and the first water pump is installed in the first pipeline; The reservoir is connected to the inner mold of the mold through a second pipeline, and the second water pump is installed in the second pipeline; The first control unit is connected to the first water pump; the second control unit is connected to the second water pump.

2. A heating device for gel injection molding according to claim 1, characterized in that: A heater is installed on the surface of the first shell.

3. A heating device for gel injection molding according to claim 1, characterized in that: The second pipeline includes a hard pipe part and a hose part. One end of the hose part is connected to the reservoir, and the other end of the hose part is a diversion opening.

4. A heating device for gel injection molding according to claim 1, characterized in that: The first cavity is filled with a first heating medium; the second cavity is filled with a second heating medium.

5. A heating device for gel injection molding according to claim 1, characterized in that: The mold is equipped with a temperature measuring device, the temperature measuring device is connected to the temperature difference measuring device, the temperature difference measuring device is connected to the temperature transmitter, and the temperature transmitter is connected to the second control unit.

6. A heating device for gel injection molding according to claim 1, characterized in that: A flow meter is arranged in the second pipeline, the flow meter is connected to a flow transmitter, and the flow transmitter is connected to a second control unit.

7. A heating device for gel injection molding according to claim 1, characterized in that: The storage is provided with a water level pressure meter, the water level pressure meter is connected to a frequency converter, and the frequency converter is connected to a first control unit.

8. A heating device for gel injection molding according to claim 1, characterized in that: The rectangular positioning platform is provided with a handle.

9. A heating device for gel injection molding according to claim 1, characterized in that: The first control unit and the second control unit are PID processors.

10. A heating device for gel injection molding according to claim 2, characterized in that: The heater is a PTC heater.

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