Heating and cooling device and mold heating and cooling system

Abstract

The utility model discloses a heating and cooling device and a mold heating and cooling system, the heating and cooling device and the mold heating and cooling system are used for heating or cooling a mold through heat conduction oil, a plurality of oil channels are formed in the mold, and the heating and cooling device comprises a mold temperature controller, a heat exchanger, an oil distributor and an oil collector; the mold temperature controller is used for heating heat conduction oil, the heat exchanger is used for cooling the heat conduction oil through circulating cooling water, the oil distributor is used for dividing the heated or cooled heat conduction oil into multiple paths and injecting the multiple paths of heat conduction oil into multiple oil channels of a mold so as to heat or cool the mold, and the oil collector is used for collecting the heat conduction oil in the branches in the mold and enabling the heat conduction oil to flow back to the heat exchanger or the mold temperature controller. And the heat-conducting oil is circularly heated or cooled. The heat conduction oil, the integrated mold temperature controller and the heat exchanger are adopted, multi-path circulation is achieved through the oil distributor and the oil collector, the heating state and the cooling state can be rapidly switched, temperature control is accurate, the system structure is simplified, and safety, reliability and energy saving are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of mold temperature control, and in particular to a heating and cooling device and a mold heating and cooling system. Background Art

[0002] In industrial production, mold heating and cooling systems are crucial to product quality and production efficiency. Traditional mold temperature control technologies primarily utilize electric heating, steam heating, or direct water cooling, but these methods have significant drawbacks. For example, electric heating consumes a lot of energy and produces uneven temperature distribution, which can easily lead to localized overheating or overcooling of the mold, affecting product quality. While steam heating offers high heat transfer efficiency, it also creates high system pressure, poses safety risks, and makes precise temperature control difficult. Direct water cooling, however, can lead to internal stress concentration in the mold due to rapid cooling, shortening its service life.

[0003] This problem is particularly prominent in the pressing of non-metallic cathode plates for electrolytic manganese dioxide (EMD). Because EMD production requires extremely high mold temperature uniformity and control precision, existing heating and cooling technologies are unable to effectively address key issues such as compensating for heat loss along the length of long molds, rapidly switching between heating and cooling, and controlling the balanced flow of multiple oil channels. This results in unstable quality of the pressed cathode plates and low production efficiency. Utility Model Content

[0004] In order to solve the above problems, the purpose of the embodiments of the present application is to provide a heating and cooling device and a mold heating and cooling system.

[0005] To achieve the above-mentioned objectives, the present application provides, in a first aspect, a heating and cooling device for heating or cooling a mold using thermal oil, wherein a plurality of oil channels are provided in the mold, and the heating and cooling device comprises:

[0006] Mold temperature controller, used to heat thermal oil;

[0007] Heat exchanger, used to cool the thermal oil through circulating cooling water;

[0008] An oil separator, the inlet of which is connected to the outlet of the mold temperature controller and / or the heat exchanger. The outlet of the oil separator is provided with multiple oil outlet pipelines, which are respectively connected to the inlets of multiple oil channels of the mold, and are used to divide the heated or cooled thermal oil into multiple channels and inject them into the multiple oil channels of the mold to heat or cool the mold;

[0009] The oil collector has its outlet connected to the inlet of the mold temperature controller and / or the heat exchanger. The inlet of the oil collector is provided with multiple oil return pipelines, which are respectively connected to the outlets of multiple oil channels of the mold. The oil return pipelines are used to collect the branched heat transfer oil in the mold and flow it back to the heat exchanger or mold temperature controller to circulate and heat or cool the heat transfer oil.

[0010] In an embodiment of the present application, the heating and cooling device further comprises:

[0011] A plurality of flow detection components are respectively arranged on a plurality of oil outlet pipelines for measuring the flow of the heat transfer oil flowing into each oil channel.

[0012] In an embodiment of the present application, the heating and cooling device further comprises:

[0013] A plurality of temperature detection components are respectively arranged on a plurality of oil outlet pipelines for measuring the oil temperature of the heat transfer oil flowing into each oil channel.

[0014] In an embodiment of the present application, when the inlet of the oil separator is connected to the outlet of the mold temperature controller and the heat exchanger respectively, and / or the outlet of the oil collector is connected to the inlet of the mold temperature controller and the heat exchanger respectively, the heating and cooling device further includes:

[0015] Multiple pipeline on-off control components are respectively arranged on the outlet pipelines and / or inlet pipelines of the mold temperature controller and the heat exchanger, and are used to control the on-off of the pipelines to control the flow direction of the heat transfer oil.

[0016] A second aspect of an embodiment of the present application provides a mold heating and cooling system, the system comprising:

[0017] The mold is provided with multiple oil channels;

[0018] The above-mentioned heating and cooling device is used to heat the mold.

[0019] In an embodiment of the present application, the mold includes:

[0020] The cavity is used to fill the powder;

[0021] Cavity wrapping, set around the cavity, used to tighten the cavity periphery;

[0022] The upper die is used to press into the cavity and is heated by the heat-conducting oil heated by the heating and cooling device to press the powder in the cavity and shape the powder;

[0023] The lower mold plate is set below the cavity and is used to heat the powder at the bottom of the cavity and support the pressing force of the upper mold.

[0024] In an embodiment of the present application, the mold further includes:

[0025] The bottom plate is provided below the lower template and is used to support and install the cavity. The bottom plate is provided with a plurality of limiting holes.

[0026] Lower mold support column, used to support the lower mold plate and base plate;

[0027] The ejector rod passes through the limiting hole of the bottom plate and acts on the lower template to lift the lower template to complete demoulding.

[0028] The base is used to transmit the force of the lower die support column to the press platform;

[0029] The ejector plate is connected to the ejector rod and the ejector pin on the press platform, and is used to drive the ejector rod to move upward under the action of the ejector pin on the press platform;

[0030] The ejector guide rod is connected to the ejector plate at the bottom and passes through the limit hole on the bottom plate at the top. A buffer spring is sleeved on the ejector rod. During the ejection process, the ejector guide rod moves upward and the buffer spring is compressed. At the end of the ejection process, the buffer spring acts on the ejector plate to reset the ejector plate.

[0031] In the embodiment of the present application, the inlets of the multiple oil channels of the mold are respectively distributed at both ends of the mold.

[0032] The above technical solution provides a heating and cooling device for heating or cooling a mold using thermal oil. The mold is provided with multiple oil channels. The heating and cooling device includes: a mold temperature controller, a heat exchanger, an oil separator, and an oil collector. The mold temperature controller is used to heat the thermal oil. The heat exchanger is used to cool the thermal oil using circulating cooling water. The oil separator is used to divide the heated or cooled thermal oil into multiple channels and inject them into the multiple oil channels of the mold to heat or cool the mold. The oil collector is used to collect the divided thermal oil in the mold and return it to the heat exchanger or mold temperature controller to circulate the heating or cooling thermal oil. This application uses thermal oil, integrates the mold temperature controller and heat exchanger, and realizes multi-channel circulation through the oil separator and oil collector. It can quickly switch between heating and cooling states, accurately control temperature, simplify the system structure, and is safe, reliable, and energy-saving.

[0033] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following detailed description, they are used to explain the embodiments of the present application but do not constitute a limitation on the embodiments of the present application. In the accompanying drawings:

[0035] Figure 1 A schematic structural diagram of a heating and cooling device provided in a specific embodiment of the present application;

[0036] Figure 2 A schematic diagram of an upper die oil passage of a mold provided in a specific embodiment of the present application;

[0037] Figure 3 A schematic diagram of a lower die oil passage of a mold provided in a specific embodiment of the present application;

[0038] Figure 4 A schematic diagram of the design principle of a mold provided in an embodiment of the present application.

[0039] In the accompanying drawings: 1-heat exchanger; 2-first ball valve; 3-second ball valve; 4-oil separator; 5-vortex flowmeter; 6-mold; 7-thermocouple; 8-oil collector; 9-mold temperature controller; 10-third ball valve; 6.1-upper mold; 6.2-cavity; 6.3-cavity edging; 6.4-base plate; 6.5-lower mold plate; 6.6-base frame; 6.7-lower mold support column; 6.8-ejector rod; 6.9-base; 6.10-first top plate; 6.11-second top plate; 6.12-buffer spring; 6.13-ejector guide rod. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the specific implementation methods described herein are only used to illustrate and explain the embodiments of the present application and are not used to limit the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0041] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0043] Figure 1 This is a schematic diagram of the structure of a heating and cooling device provided in a specific embodiment of the present application. Figure 1 As shown, an embodiment of the present application provides a heating and cooling device for heating or cooling a mold using thermal oil. A plurality of oil channels are provided in the mold. The heating and cooling device may include:

[0044] Mold temperature controller 9, used for heating thermal oil;

[0045] Heat exchanger 1, used to cool the thermal oil through circulating cooling water;

[0046] An oil separator 4, the inlet of which is connected to the outlet of the mold temperature controller and / or the heat exchanger. The outlet of the oil separator is provided with multiple oil outlet pipelines, which are respectively connected to the inlets of multiple oil channels of the mold, and are used to divide the heated or cooled thermal oil into multiple channels and inject them into the multiple oil channels of the mold to heat or cool the mold;

[0047] The oil collector 8 has its outlet connected to the inlet of the mold temperature controller and / or the heat exchanger. The inlet of the oil collector is provided with a plurality of return oil pipelines, which are respectively connected to the outlets of the plurality of oil channels of the mold, and are used to collect the branched heat transfer oil in the mold and flow it back to the heat exchanger or the mold temperature controller to circulate and heat or cool the heat transfer oil.

[0048] It can be understood that in order to improve the heating efficiency of the pressed material in the mold, the embodiment of the present application uses thermal oil as a medium to heat or cool the mold. Compared with traditional electric heating, the thermal oil heating is more uniform and the control accuracy is higher. In the embodiment of the present application, the heating and cooling device includes a mold temperature controller, a heat exchanger, an oil separator and an oil collector. Among them, the mold temperature controller is used to heat the thermal oil, thereby heating the mold. The heat exchanger is used to cool the thermal oil through circulating cooling water, thereby cooling the mold. The oil separator is used to divide the heated or cooled thermal oil into multiple paths and inject it into multiple oil channels of the mold to heat or cool the mold. The oil collector is used to collect the branch thermal oil in the mold into the main oil circuit to avoid the numerous and cluttered oil circuits, and flow back to the heat exchanger or mold temperature controller to circulate the heating or cooling thermal oil.

[0049] In one example, the mold temperature controller can be connected in series with the heat exchanger to form a heating and cooling unit, and the oil collector and the oil separator are respectively connected to the inlet and outlet of the heating and cooling unit. When the mold needs to be heated, the mold temperature controller is turned on and the heat exchanger is turned off to achieve circulating heating of the thermal oil, thereby heating the mold; when the mold temperature controller needs to be cooled, the mold temperature controller is turned off and the heat exchanger is turned on, and the circulating cooling water in the heat exchanger cools the hot oil, thereby cooling the mold.

[0050] In another example, a mold temperature controller can be connected in parallel with a heat exchanger, which is then connected to an oil collector and oil distributor via a main oil line. In the parallel pipeline, the pipeline where the mold temperature controller is located is the heating pipeline, and the pipeline where the heat exchanger is located is the cooling pipeline. Both the heating and cooling pipelines can be equipped with pipeline on / off control components to switch the heating and cooling modes of the heating and cooling devices by controlling the flow of the pipelines. The pipeline on / off control components can be stop valves, gate valves, ball valves, butterfly valves, check valves, or plug valves, etc.

[0051] The above technical solution provides a heating and cooling device for heating or cooling a mold using thermal oil. The mold is provided with multiple oil channels. The heating and cooling device includes: a mold temperature controller, a heat exchanger, an oil separator, and an oil collector. The mold temperature controller is used to heat the thermal oil. The heat exchanger is used to cool the thermal oil using circulating cooling water. The oil separator is used to divide the heated or cooled thermal oil into multiple channels and inject them into the multiple oil channels of the mold to heat or cool the mold. The oil collector is used to collect the divided thermal oil in the mold and return it to the heat exchanger or mold temperature controller to circulate the heating or cooling thermal oil. This application uses thermal oil, integrates the mold temperature controller and heat exchanger, and realizes multi-channel circulation through the oil separator and oil collector. It can quickly switch between heating and cooling states, accurately control temperature, simplify the system structure, and is safe, reliable, and energy-saving.

[0052] In the embodiment of the present application, when the inlet of the oil separator is connected to the outlet of the mold temperature controller and the heat exchanger respectively, and / or the outlet of the oil collector is connected to the inlet of the mold temperature controller and the heat exchanger respectively, the heating and cooling device may further include:

[0053] Multiple pipeline on-off control components are respectively arranged on the outlet pipelines and / or inlet pipelines of the mold temperature controller and the heat exchanger, and are used to control the on-off of the pipelines to control the flow direction of the heat transfer oil.

[0054] For example, Figure 1 As shown, the pipeline on-off control component is a ball valve. The inlet of the mold temperature controller 9 is connected to the oil collector 8, and the outlet of the mold temperature controller 9 is respectively connected to the second ball valve 3 and the third ball valve 10. The third ball valve 10 is connected to the heat exchanger 1, and the heat exchanger 1 is connected to the first ball valve 2. The second ball valve 3 and the first ball valve 2 are connected to the oil separator 4. In this way, the heating and cooling modes of the heating and cooling device can be switched through multiple ball valves. In particular, the mold temperature controller operates in heating mode and stops in cooling mode.

[0055] In an embodiment of the present application, the heating and cooling device may further include:

[0056] A plurality of flow detection components are respectively arranged on a plurality of oil outlet pipelines for measuring the flow of the heat transfer oil flowing into each oil channel.

[0057] It is understood that the flow detection component can be an orifice flowmeter, vortex flowmeter, turbine flowmeter, electromagnetic flowmeter, ultrasonic flowmeter, or other flow detection component. To ensure consistent flow in each oil circuit in the mold, the embodiment of the present application is equipped with a flow detection component on each oil outlet pipeline of the oil distributor to monitor the flow in each pipeline, ensure flow consistency in each pipeline, and ensure uniform heating or cooling.

[0058] In an embodiment of the present application, the heating and cooling device may further include:

[0059] A plurality of temperature detection components are respectively arranged on a plurality of oil outlet pipelines for measuring the oil temperature of the heat transfer oil flowing into each oil channel.

[0060] It is understood that the temperature monitoring component can be a thermistor, infrared thermometer, fiber optic temperature sensor, thermocouple, or other temperature-sensing component. To ensure consistent temperatures across the mold's oil circuits, the present embodiment of the application includes a temperature sensing component on each oil outlet line of the oil distributor to monitor the temperature of the thermal oil in each line, ensuring consistent temperatures across the lines and thus uniform heating or cooling. Preferably, the temperature sensing component is located near the mold's oil channel inlet to ensure accurate detection results.

[0061] In the embodiment of the present application, the inlets of the multiple oil channels of the mold are respectively distributed at both ends of the mold.

[0062] It can be understood that the oil channel is optimized for long molds and to improve the heating efficiency of the pressed materials. In order to solve the problem that the loss of oil temperature in the length direction leads to high temperature at the oil inlet end and low temperature at the oil outlet end, the mold oil channel adopts an inlet and outlet design arranged on both sides of both ends to achieve opposite hot oil flow and compensate for each other's heat loss.

[0063] In a specific embodiment of the present application, Figure 1 As shown, when the mold 6 needs to be heated, the third ball valve 10 and the first ball valve 2 are closed, the second ball valve 3 is opened, and the mold temperature controller 9 heats the heat transfer oil medium to the required temperature. The oil pump in the mold temperature controller 9 introduces the hot oil into the oil separator 4 through the pipeline. The oil separator divides the hot oil into four paths, which are respectively connected to the oil channels of the mold to achieve mold heating. Each oil pipe is connected to a vortex flowmeter 5 and a thermocouple 7 to ensure that the flow rate and oil temperature in each oil path are consistent, thereby ensuring the uniformity of the heating temperature of the upper and lower molds of the mold; the hot oil passing through the mold will return to the oil collector 8 through the return oil path, and then flow into the mold temperature controller 9 through the main oil path for additional heating, and circulate continuously to achieve a stable mold temperature; when cooling is required, the mold temperature controller 9 is closed for heating, the second ball valve 3 is closed, the third ball valve 10 and the first ball valve 2 are opened, and the oil path is switched to the oil path with the heat exchanger 1. The heat exchanger 1 quickly cools the hot oil through circulating cooling water, and the cooled heat transfer oil is then circulated to quickly cool the mold.

[0064] This application uses thermal oil as the cooling and heating medium. Compared with hot steam as the medium, thermal oil has smaller thermal expansion, less pressure on the pipeline, less risk of pipeline rupture, and can be recycled for a long time. The heating and cooling oil circuits are simple, the conversion is simple, and no complex control system is required.

[0065] The present application also provides a mold heating and cooling system, which may include:

[0066] The mold is provided with multiple oil channels;

[0067] The heating and cooling device in the above embodiment is used to heat the mold.

[0068] The mold in the embodiment of the present application may be a pressing mold for a non-metallic cathode plate for electrolytic manganese dioxide (EMD).

[0069] In the embodiment of the present application, the inlets of the multiple oil channels of the mold are respectively distributed at both ends of the mold.

[0070] Figure 2 A schematic diagram of an upper mold oil passage of a mold provided in a specific embodiment of the present application. Figure 3 This is a schematic diagram of the lower mold oil passage of a mold provided in a specific embodiment of the present application. Figure 2 and Figure 3 As shown, the oil channel is optimized for long molds and to improve the heating efficiency of the pressed materials. In order to solve the problem that the oil temperature loss in the length direction leads to high temperature at the oil inlet end and low temperature at the oil outlet end, the mold oil channel in the embodiment of the present application adopts the design of A inlet and B inlet arranged on both sides of both ends to realize opposite hot oil flow and compensate for each other's heat loss.

[0071] In an embodiment of the present application, the mold may include:

[0072] The cavity is used to fill the powder;

[0073] Cavity wrapping, set around the cavity, used to tighten the cavity periphery;

[0074] The upper die is used to press into the cavity and is heated by the heat-conducting oil heated by the heating and cooling device to press the powder in the cavity and shape the powder;

[0075] The lower mold plate is set below the cavity and is used to heat the powder at the bottom of the cavity and support the pressing force of the upper mold.

[0076] In an embodiment of the present application, the mold may further include:

[0077] The bottom plate is provided below the lower template and is used to support and install the cavity. The bottom plate is provided with a plurality of limiting holes.

[0078] Lower mold support column, used to support the lower mold plate and base plate;

[0079] The ejector rod passes through the limiting hole of the bottom plate and acts on the lower template to lift the lower template to complete demoulding;

[0080] The base is used to transmit the force of the lower die support column to the press platform;

[0081] The ejector plate is connected to the ejector rod and the ejector pin on the press platform, and is used to drive the ejector rod to move upward under the action of the ejector pin on the press platform;

[0082] The ejector guide rod is connected to the ejector plate at the bottom and passes through the limit hole on the bottom plate at the top. A buffer spring is sleeved on the ejector rod. During the ejection process, the ejector guide rod moves upward and the buffer spring is compressed. At the end of the ejection process, the buffer spring acts on the ejector plate to reset the ejector plate.

[0083] Figure 4 This is a schematic diagram of the design principle of a mold provided in an embodiment of the present application. Figure 4 As shown, in the embodiment of the present application, the mold includes an upper mold 6.1, a cavity 6.2, a cavity edge 6.3, a bottom plate 6.4, a lower mold plate 6.5, a base frame 6.6, a lower mold support column 6.7, a push rod 6.8, a base 6.9, a first top plate 6.10, a second top plate 6.11, a buffer spring 6.12 and an ejection guide rod 6.13.

[0084] Specifically, the upper mold 6.1 is used to press into the mold cavity and can be heated by heat-conducting oil to act on the pressed powder to form it. The mold cavity 6.2 is used to fill the powder, and the mold cavity is set with a demolding slope. The mold cavity edging 6.3 tightens the periphery of the mold cavity to prevent the side from deforming or expanding the finished product due to lateral pressure during the pressing process. The bottom plate 6.4 is used to support and install the upper mold cavity. The lower mold plate 6.5 is used to heat the material at the bottom, support the pressing force of the upper mold, and eject the mold. The base frame 6.6 is used to support the bottom plate and the limit frame. The lower mold support column 6.7 is used to support the lower mold plate 6.5 and the bottom plate 6.4. The ejector rod 6.8 acts on the lower mold plate 6.5 through the circular through hole of the bottom plate 6.4, which can lift the lower mold plate 6.5 and play a demolding role. The base 6.9 is used to mainly transmit the force of the lower mold support column 6.7 to the base, and then transmit it to the press platform through the base. The first top plate 6.10 and the second top plate 6.11 are connected to the top rod 6.8 respectively. The ejector pin on the press platform acts on the top plate. When the ejector pin on the press platform lifts the top plate, the ejector pin 6.8 moves up together. The buffer spring 6.12 is sleeved on the ejection guide rod. The ejection guide rod 6.13 is connected to the top plate at the bottom and passes through the limit hole left on the bottom plate 6.4 at the top. During the ejection process, the ejection guide rod 6.13 moves up and the buffer spring 6.12 on the ejection guide rod 6.13 is compressed, so that the ejection process is balanced by the reaction force of the buffer spring 6.12, so that there will be no violent lifting phenomenon, which prevents the embryo from being pressed and cracked and the internal part of the mold from being stretched. When the ejection force is removed, the compression spring 6.12 acts on the top plate again to restore it to its original position.

[0085] In the embodiment of the present application, spring steel is used to achieve lamination, which speeds up the efficiency. The lower mold is buffered by the spring to stabilize the demoulding, and the lower mold moves smoothly, thereby avoiding mold jamming.

[0086] Preferably, the mold material in the embodiment of the present application is selected from 718H hot pressing molds for upper and lower punches, and the steel surface is hard chrome plated for a smoother surface. The middle mold is made of 45# steel, and reinforcement ribs and demoulding slopes are set near the pressing area.

[0087] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0088] The above are merely embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A heating and cooling device, characterized in that: Used to heat or cool the mold by heat-conducting oil, the mold is provided with multiple oil channels, and the heating and cooling device includes: A mold temperature controller, used for heating the thermal oil; a heat exchanger, configured to cool the thermal oil via circulating cooling water; an oil separator, wherein the inlet of the oil separator is connected to the outlet of the mold temperature controller and / or the heat exchanger, and the outlet of the oil separator is provided with multiple oil outlet pipelines, which are respectively connected to the inlets of the multiple oil channels of the mold, and are used to divide the heated or cooled thermal oil into multiple channels and inject them into the multiple oil channels of the mold to heat or cool the mold; An oil collector, wherein the outlet of the oil collector is connected to the inlet of the mold temperature controller and / or the heat exchanger, and the inlet of the oil collector is provided with multiple oil return pipelines, which are respectively connected to the outlets of the multiple oil channels of the mold, and are used to collect the branched heat transfer oil in the mold and flow it back to the heat exchanger or mold temperature controller to circulate and heat or cool the heat transfer oil.

2. The heating and cooling device according to claim 1, characterized in that: The heating and cooling device also includes: A plurality of flow detection components are respectively arranged on the plurality of oil outlet pipelines and are used to measure the flow of the heat transfer oil flowing into each of the oil channels.

3. The heating and cooling device according to claim 1, characterized in that: The heating and cooling device also includes: A plurality of temperature detection components are respectively arranged on the plurality of oil outlet pipelines and are used to measure the oil temperature of the heat transfer oil flowing into each of the oil channels.

4. The heating and cooling device according to claim 1, characterized in that In the case where the inlet of the oil separator is connected to the outlet of the mold temperature controller and the heat exchanger respectively, and / or the outlet of the oil collector is connected to the inlet of the mold temperature controller and the heat exchanger respectively, the heating and cooling device further comprises: A plurality of pipeline on-off control components are respectively arranged on the outlet pipeline and / or inlet pipeline of the mold temperature controller and the heat exchanger, and are used to control the on-off of the pipeline to control the flow direction of the heat transfer oil.

5. A mold heating and cooling system, characterized in that: The system comprises: A mold, wherein a plurality of oil channels are provided in the mold; The heating and cooling device according to any one of claims 1 to 4, is used to heat the mold.

6. The system according to claim 5, characterized in that The mold comprises: The cavity is used to fill the powder; The cavity edging is provided at the periphery of the cavity and is used to tighten the periphery of the cavity; The upper mold is used to press into the mold cavity and is heated by the heat-conducting oil heated by the heating and cooling device to press the powder in the mold cavity to shape the powder; The lower mold plate is arranged below the mold cavity and is used for heating the powder at the bottom of the mold cavity and supporting the pressing force of the upper mold.

7. The system according to claim 6, characterized in that The mold further comprises: A bottom plate is provided below the lower template and is used to support and install the cavity. A plurality of limiting holes are provided on the bottom plate. A lower mold support column, used to support the lower mold plate and the bottom plate; A push rod passes through the limiting hole of the bottom plate and acts on the lower template to lift the lower template to complete demoulding; A base, used to transmit the force of the lower die support column to the press platform; A top plate is connected to the top rod and the top pin on the press platform, and is used to drive the top rod to move upward under the action of the top pin on the press platform; An ejection guide rod is connected to the ejector plate at the bottom and passes through the limiting hole on the bottom plate at the top. A buffer spring is sleeved on the ejector rod. During the ejection process, the ejection guide rod moves upward and the buffer spring is compressed. When the ejection process is completed, the buffer spring acts on the ejector plate to reset the ejector plate.

8. The system according to claim 5, wherein: The inlets of the multiple oil passages of the mold are respectively distributed at two ends of the mold.

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