Tandem type linear step temperature control mold temperature controller and method

Abstract

The invention relates to the technical field of mold temperature controller equipment, and discloses a tandem type linear step temperature control mold temperature controller and a method. The mold temperature controller comprises a heating pipe, a liquid output pipe and a temperature control box, the temperature control box is internally provided with a heat storage cavity and is filled with a heat phase change material, the position of a heat conduction piece is adjusted through a lifter to change the contact area of an upper heat contact rod and the heat phase change material, and real-time monitoring and auxiliary heating are combined with a temperature controller. According to the matching method, temperature control is achieved by matching the target temperature with the contact area, regulating and controlling the heating pipe through PID and dynamically compensating heat through the thermal phase change material, the temperature control precision and the response speed are improved through the double mechanisms of PID large-bureau regulation and thermal phase change micro-control compensation, fluctuation is reduced, and the matching method is suitable for the temperature control requirement of high-precision mold machining.

Description

Technical Field

[0001] The present invention relates to the technical field of mold temperature control equipment, and in particular to a mold temperature control machine and method with series-connected linearized stepped temperature control. Background Art

[0002] In the process of mold processing and manufacturing, the temperature control accuracy of the mold temperature control machine plays a crucial role in the quality and production efficiency of the mold. The traditional mold temperature control machine mainly heats the oil temperature through heating tubes and uses the water cooling method for temperature adjustment, but this method has obvious hysteresis. Specifically, when a temperature signal is generated, the system needs to adjust the temperature according to the requirements of the temperature signal. However, during this process, adverse temperature factors have already occurred, such as too high or too low temperature, which will have an improper impact on mold production, resulting in deviations in the dimensional accuracy, surface quality, etc. of the mold, and may even cause mold damage or production stagnation, seriously affecting production efficiency and product quality.

[0003] The existing methods mainly use PID comprehensive control of temperature factors. Although PID control can adjust the temperature to a certain extent, it mainly adjusts based on the error of the system, and there is still a certain hysteresis in the response to temperature fluctuations. Especially in the face of complex temperature change scenarios, it is difficult to achieve high-precision temperature control solely relying on PID control. In addition, the traditional PID control has an unsatisfactory adjustment effect when dealing with fine fluctuations and rapid changes in temperature, and is prone to problems such as temperature overshoot or too long adjustment time, and cannot meet the strict requirements of high-precision mold processing and manufacturing for temperature control.

[0004] Therefore, how to improve the temperature control accuracy of the mold temperature control machine and reduce the influence of temperature fluctuations has become a technical problem to be solved in the technical field of mold temperature control equipment. Summary of the Invention

[0005] To solve the above technical problems, the present invention is realized through the following technical solutions:

[0006] The present invention provides a mold temperature control machine with series-connected linearized stepped temperature control, including a heating tube, an output liquid tube connected to the heating tube. The output liquid tube is configured with a temperature detector, and the output liquid tube is also configured with a temperature control box located downstream of the temperature detector. The temperature control box includes a heat insulation shell and a guiding plate fixed inside the heat insulation shell. A heat conduction member is inserted into the heat insulation shell. The heat conduction member includes a first piston that is in extrusion contact with the inner wall of the heat insulation shell. The interior of the heat insulation shell includes a heat storage cavity located between the first piston and the guiding plate, and the heat storage cavity is filled with a heat phase change material.

[0007] A plurality of upper heat contact rods are provided on the upper side of the first piston. The upper heat contact rods vertically penetrate the entire heat storage cavity and movably pass upward through the guide plate. A plurality of lower heat contact rods are provided on the lower side of the first piston. The bottom ends of the plurality of lower heat contact rods are commonly connected to the second piston. A bottom cover is fixedly installed on the bottom side of the heat insulation shell. A stroke cavity is provided on the bottom cover, and the second piston is disposed in the stroke cavity.

[0008] The inside of the heat insulation shell includes a liquid flow cavity located between the first piston and the second piston. The liquid flow cavity is communicated with the output liquid pipe. An elevator for driving the heat conduction member to vertically lift is disposed above the temperature control box. A buffer pipe is disposed on the circumferential side of the heat insulation shell, and the buffer pipe is communicated with the heat storage cavity. A temperature controller is disposed on the circumferential side of the heat insulation shell. The temperature controller includes a temperature probe for detecting the temperature of the heat storage cavity.

[0009] As a preferred technical solution of the present invention: The inside of the buffer pipe is a buffer cavity, the buffer cavity is communicated with the heat storage cavity, a third piston is disposed in the buffer cavity, a cover is fixedly installed at the external port of the buffer pipe, and a tension spring is disposed between the cover and the third piston.

[0010] As a preferred technical solution of the present invention: A partition cavity is provided inside the heat insulation shell above the guide plate. The guide plate is provided with a plurality of guide holes, and the upper heat contact rods penetrate the guide holes and are inserted into the partition cavity.

[0011] As a preferred technical solution of the present invention: The central position on the upper side of the first piston is fixedly connected to a driving rod, and the driving rod is connected to the output end of the elevator.

[0012] As a preferred technical solution of the present invention: The average liquid flow cross-sectional area of the liquid flow cavity is larger than the liquid flow cross-sectional area of the output liquid pipe. A liquid inlet flange is provided on one side of the heat insulation shell, and a liquid outlet flange is provided on the other side. The liquid inlet flange and the liquid outlet flange are communicated with the liquid flow cavity. Wherein, the average liquid flow cross-sectional area of the liquid flow cavity is the ratio of the total volume of the liquid flow cavity to the length of the liquid flow cavity along the axial direction of the output liquid pipe.

[0013] As a preferred technical solution of the present invention: A first sealing groove is provided on the top surface of the heat insulation shell, and a second sealing groove is provided on the top surface of the bottom cover. Sealing rings are disposed at the positions of the first sealing groove and the second sealing groove.

[0014] As a preferred technical solution of the present invention: The first piston, the upper heat contact rods, and the lower heat contact rods are made of the same heat-conducting material and are of an integrally formed structure. The bottom cover and the second piston are made of heat-insulating materials.

[0015] As a preferred technical solution of the present invention: The temperature controller is further configured with an electronic heat exchanger for assisting in regulating the temperature of the thermal phase change material in the heat storage cavity.

[0016] The present invention provides a series-connected linearized stepped temperature control method, including the following contents:

[0017] S1. According to the target temperature, adjust the horizontal position of the first piston through the lifter, thereby adjusting the length of the upper heat contact rod in the heat storage cavity. Among them, the higher the target temperature, the lower the horizontal position of the first piston, the longer the length of the upper heat contact rod in the heat storage cavity, and the larger the direct contact area between the upper heat contact rod and the thermo-phase change material; among them, the lower the target temperature, the higher the horizontal position of the first piston, the shorter the length of the upper heat contact rod in the heat storage cavity, and the smaller the direct contact area between the upper heat contact rod and the thermo-phase change material.

[0018] S2. Start the mold temperature controller. After the liquid flow is heated by the heating pipe, it reaches the temperature detector through the output liquid pipe. When the temperature detector detects that the temperature of the liquid flow output from the output liquid pipe is stable at the set target temperature, the external output valve opens to supply heat to the mold.

[0019] S3. When the temperature of the liquid flow output from the output liquid pipe fluctuates, the temperature detector detects the temperature fluctuation signal, and the control system feedback-regulates the heating pipe through the PID strategy to control the temperature of the subsequent output liquid flow.

[0020] S4. When the liquid flow with excessive temperature passes through the liquid flow cavity of the temperature control box, the excessive heat is transferred to the heat storage cavity through the lower heat contact rod, and the thermo-phase change material in the heat storage cavity absorbs the excessive heat. At the same time, the temperature probe detects the real-time temperature of the thermo-phase change material in the heat storage cavity, that is, the real-time temperature is the excessive temperature. When the real-time temperature of the thermo-phase change material exceeds the target temperature, the lifter raises the horizontal position of the first piston upward, and the height difference △h1 of the raise is proportional to △W1, where △W1 is the difference between the excessive temperature and the target temperature, and at this time the excessive temperature is greater than the target temperature. When the temperature of the thermo-phase change material gradually decreases to the target temperature, the lifter gradually lowers the horizontal position of the first piston downward.

[0021] S5. When the liquid flow with insufficient temperature passes through the liquid flow cavity of the temperature control box, the qualified heat of the thermo-phase change material in the heat storage cavity is transferred from the upper heat contact rod to the lower heat contact rod to quickly compensate the heat for the liquid flow with unqualified temperature. The temperature probe detects the real-time temperature of the thermo-phase change material in the heat storage cavity. When the real-time temperature of the thermo-phase change material is lower than the target temperature, that is, the real-time temperature is the unqualified temperature, the lifter raises the horizontal position of the first piston upward, and the height difference △h2 of the raise is proportional to △W2, where △W2 is the difference between the target temperature and the unqualified temperature and the target temperature is greater than the unqualified temperature. When the temperature of the thermo-phase change material gradually rises to the target temperature, the lifter gradually lowers the horizontal position of the first piston downward to restore the initial heat contact area.

[0022] Compared with the existing technology, the beneficial effects of the present invention are:

[0023] 1. Based on the traditional PID strategy temperature control, a dynamic thermal compensation mechanism based on thermal phase change materials is connected in series in the downstream section of the output liquid pipe. Through the organic combination of the overall regulation of the traditional PID and the gradient and timing of the dynamic thermal phase change micro-compensation, the liquid flow temperature can be controlled more precisely, effectively reducing temperature fluctuations, improving the temperature control accuracy of the output liquid flow of the mold temperature controller, and providing a reliable temperature basis for high-precision mold processing and manufacturing.

[0024] 2. In the present invention, when the temperature of the liquid flow output from the output liquid pipe fluctuates, whether the temperature exceeds the standard or does not meet the standard, the temperature control box can quickly respond and timely adjust the degree of external heat exchange in combination with its own temperature state to avoid the interference of its own bad state on the temperature of the liquid flow output from the output liquid pipe. When the liquid flow with excessive temperature passes through the temperature control box, the excessive heat can be quickly transferred to the thermal phase change material in the heat storage cavity through the lower heat contact rod, and the thermal phase change material absorbs the excessive heat; when the liquid flow with insufficient temperature passes through the temperature control box, the qualified heat of the thermal phase change material in the heat storage cavity can be transferred from the upper heat contact rod to the lower heat contact rod and quickly compensate the heat for the liquid flow with unqualified temperature, greatly shortening the temperature adjustment time and improving the response speed of the system to temperature fluctuations. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the mold temperature controller of the present invention.

[0026] Figure 2 is Figure 1 a schematic diagram of the partial enlarged structure at A in

[0027] Figure 3 is Figure 2 a schematic diagram of the partial enlarged structure at B in

[0028] Figure 4 It is a schematic diagram of the overall combined structure of the temperature control box and related components in the present invention.

[0029] Figure 5 It is a schematic diagram of the disassembled structure of the temperature control box and related components in the present invention.

[0030] Figure 6 It is a schematic diagram of the disassembled structure of the heat insulation shell and related components in the present invention.

[0031] Figure 7 It is a schematic diagram of the structure of the heat conducting member in the present invention.

[0032] Figure 8 It is a schematic diagram of the structure of the bottom cover in the present invention.

[0033] Wherein: 1 - heating pipe; 2 - output liquid pipe; 3 - temperature detector; 4 - temperature control box, 401 - heat insulation shell, 402 - liquid flow cavity, 403 - guide plate, 4031 - guide hole, 4032 - central hole, 404 - heat storage cavity, 405 - partition cavity, 406 - buffer pipe, 4061 - buffer cavity, 407 - cover, 408 - inlet flange, 409 - outlet flange, 410 - first sealing groove; 5 - heat conduction member, 501 - first piston, 502 - upper heat contact rod, 503 - lower heat contact rod, 504 - second piston, 505 - driving rod; 6 - tension spring; 7 - temperature controller, 701 - temperature probe, 702 - electronic heat exchange fin; 8 - sealing ring; 9 - bottom cover, 901 - stroke cavity, 902 - second sealing groove; 10 - third piston; 11 - lifter. Specific implementation mode

[0034] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0035] Embodiment 1. The overall structure and core components of the mold temperature controller in the present invention are as follows:

[0036] Heating pipe 1: As Figure 1 , as the main heating element, initially heats the liquid flow to make the liquid flow temperature reach the target temperature range. After the liquid flow is heated by the heating pipe 1, it is transported to the subsequent temperature control box 4 through the output liquid pipe 2.

[0037] Temperature detector 3: As Figure 1 , Figure 2 , is installed on the output liquid pipe 2 and is used to monitor the temperature of the output liquid flow in real time. When it detects that the liquid flow temperature is stable at the set target temperature, it feeds back a signal to the control system to control the opening of the external output valve to supply heat to the mold; when it detects temperature fluctuations, it triggers the PID regulation mechanism.

[0038] The temperature control box 4 is the key component to achieve linear stepped temperature control, and its internal structure and working principle are as follows:

[0039] Heat insulation shell 401: As Figure 4 , Figure 5 , Figure 6 , Figure 8 , as the main structure of the temperature control box 4, forms multiple functional chambers inside, and is externally configured with a buffer pipe 406 and a temperature controller 7. The top surface of the heat insulation shell 401 is provided with a first sealing groove 410, and the bottom side is closed by a bottom cover 9. The top surface of the bottom cover 9 is provided with a second sealing groove 902. Sealing rings 8 are installed in both the first sealing groove 410 and the second sealing groove 902 to ensure the tightness of each chamber, prevent liquid flow leakage and heat dissipation.

[0040] Deflector plate 403: As shown in Figure 3 , Figure 6 , it is fixed inside the heat insulation shell 401, dividing the interior of the heat insulation shell 401 into an upper partition cavity 405 and a lower liquid flow cavity 402 and heat storage cavity 404. Multiple guiding holes 4031 are opened on the deflector plate 403 for guiding the vertical movement of the upper heat contact rod 502; a central hole 4032 is opened at the central position for installing the driving rod 505.

[0041] Thermal conductor 5: As shown in Figure 2 , Figure 6 , Figure 7 , including a first piston 501, an upper heat contact rod 502, a lower heat contact rod 503 and a second piston 504, where the first piston 501, the upper heat contact rod 502 and the lower heat contact rod 503 are made of the same heat-conducting material and are of an integrally formed structure to ensure rapid heat conduction.

[0042] The bottom cover 9 and the second piston 504 are made of heat-insulating materials to prevent heat transfer between the liquid flow cavity 402 and the stroke cavity 901. The first piston 501 is in extrusion contact with the inner wall of the heat insulation shell 401, dividing the interior of the heat insulation shell 401 into an upper heat storage cavity 404 and a lower liquid flow cavity 402. The upper heat contact rod 502 vertically penetrates through the entire heat storage cavity 404 and upwardly moves through the guiding hole 4031 and inserts into the partition cavity 405. The bottom end of the lower heat contact rod 503 is fixedly connected to the second piston 504, and the second piston 504 is disposed in the stroke cavity 901 of the bottom cover 9 and can move up and down in the stroke cavity 901, thereby driving the entire thermal conductor 5 to vertically lift and lower.

[0043] Heat storage cavity 404: As shown in Figure 2 , Figure 3 , Figure 4 , located between the first piston 501 and the deflector plate 403, and filled with a heat phase change material (such as phase change wax, molten salt, etc.). The phase change process (melting endothermic, solidifying exothermic) of the heat phase change material is utilized to store and release heat, thereby dynamically compensating the liquid flow temperature. The contact area between the upper heat contact rod 502 and the heat phase change material can be changed by adjusting the position of the first piston 501, thereby controlling the heat transfer efficiency.

[0044] Liquid flow cavity 402: As shown in Figure 2 , Figure 4 , Figure 6 , located between the first piston 501 and the second piston 504, and communicated with the output liquid pipes (inlet flange 408, outlet flange 409). The average liquid flow cross-sectional area of the liquid flow cavity 402 is larger than the liquid flow cross-sectional area of the output liquid pipes, which can reduce the liquid flow velocity, extend the residence time of the liquid flow in the temperature control box 4, and improve the heat exchange efficiency.

[0045] Lifter 11: As shown inFigure 2 , Figure 7 , disposed above the temperature control box 4, with the output end fixedly connected to the driving rod 505 (the driving rod 505 is fixed at the central position on the upper side of the first piston 501), and is used to drive the heat conduction member 5 to move vertically up and down, so as to adjust the length of the upper heat contact rod 502 in the heat storage cavity 404 and the contact area with the thermo-phase change material.

[0046] Buffer tube 406: As Figure 2 , Figure 4 , Figure 5 , Figure 6 , the annular side is disposed on the heat insulation shell 401, and the inside is a buffer cavity 4061 communicating with the heat storage cavity 404. A third piston 10 is disposed in the buffer cavity 4061. The external port of the buffer tube 406 is closed by a cover 407, and a tension spring 6 is installed between the cover 407 and the third piston 10.

[0047] When the thermo-phase change material expands due to heat, the pressure in the heat storage cavity 404 increases, pushing the third piston 10 to compress the tension spring 6, transferring part of the volume to the buffer cavity 4061 to relieve the internal pressure; when the thermo-phase change material cools and contracts, the tension spring 6 pushes the third piston 10 to reset, supplementing the volume to maintain pressure balance. This design can effectively prevent component damage caused by pressure fluctuations and extend the service life of the equipment.

[0048] Thermostat 7: As Figure 3 , Figure 6 , including a temperature probe 701 and an electronic heat exchanger 702. The temperature probe 701 is used to detect the real-time temperature of the thermo-phase change material in the heat storage cavity 404. The electronic heat exchanger 702 can be started when the temperature of the thermo-phase change material is lower than the target temperature to provide heat to it to assist in maintaining temperature stability; the electronic heat exchanger 702 can also be started when the temperature of the thermo-phase change material exceeds the target temperature to absorb the heat of the thermo-phase change material and discharge it outward to assist in maintaining temperature stability.

[0049] Based on the traditional PID temperature control, the present invention connects a temperature control box 4 (a dynamic heat compensation mechanism with a thermo-phase change material as the core) in series downstream of the output liquid pipe 2. When the liquid flow temperature fluctuates, the PID control is responsible for the overall regulation of the power of the heating pipe 1, while the temperature control box 4 realizes the micro-control compensation for temperature fluctuations through the endothermic or exothermic of the thermo-phase change material, forming a gradient and sequential control mode of "PID overall regulation + thermo-phase change micro-control compensation".

[0050] The present invention remedies the defect of the traditional PID control in the lagging response to temperature fluctuations. Especially when dealing with fine fluctuations and rapid changes, the thermal phase change material can absorb or release heat in real time, shorten the temperature adjustment time, and improve the response speed. It realizes the dual control of the liquid flow temperature, significantly reduces the problems of temperature overshoot or too long adjustment time, and improves the temperature control accuracy to a higher level, meeting the stringent requirements for temperature stability in high-precision mold processing.

[0051] In the present invention, as Figure 2 , 3 , 4, 7, the lifter 11 adjusts the horizontal position of the first piston 501, changes the length of the upper heat contact rod 502 in the heat storage chamber 404, so as to adjust the direct contact area between the upper heat contact rod 502 and the thermal phase change material. The higher the target temperature, the lower the horizontal position of the first piston 501, the longer the length of the upper heat contact rod 502 inserted into the heat storage chamber 404, the larger the contact area, the higher the heat transfer efficiency, and more heat can be stored; on the contrary, the lower the target temperature, the smaller the contact area, avoiding excessive heat transfer.

[0052] The present invention realizes the dynamic optimization of the heat transfer process, enables the mold temperature controller to automatically adjust the heat exchange capacity according to different target temperatures, and improves the flexibility and accuracy of temperature control. For example, under high-temperature working conditions, increasing the contact area can quickly absorb the excessive heat in the liquid flow; under low-temperature working conditions, reducing the contact area can prevent the thermal phase change material from releasing too much heat and avoid the liquid flow temperature from being too low.

[0053] Embodiment 2: The present invention designs a series-connected linearized step temperature control method for a mold temperature controller. The specific method is as follows:

[0054] Step 1: Matching the heat contact area with the target temperature: According to the target temperature, the lifter 11 adjusts the horizontal position of the first piston 501, and then adjusts the length of the upper heat contact rod 502 in the heat storage chamber 404.

[0055] The higher the target temperature: the lower the horizontal position of the first piston 501, the longer the length of the upper heat contact rod 502 in the heat storage chamber 404, the more direct contact area it has with the thermal phase change material, improving the heat transfer efficiency to store more heat.

[0056] The lower the target temperature: the higher the horizontal position of the first piston 501, the shorter the length of the upper heat contact rod 502 in the heat storage chamber 404, the less direct contact area it has with the thermal phase change material, avoiding excessive heat transfer.

[0057] Step 2: Initial heating and stable temperature output: Start the mold temperature controller. After the liquid flow is heated by the heating pipe 1, it is transported to the temperature detector 3 through the output liquid pipe 2. When the temperature detector 3 detects that the output liquid flow temperature is stable at the set target temperature, the control system opens the external output valve to supply heat to the mold.

[0058] Step 3. PID strategy for regulating the heating pipe: When the temperature detector 3 detects fluctuations in the temperature of the output liquid flow, the control system feedback-regulates the heating pipe 1 through the PID strategy to adjust the temperature of the subsequent output liquid flow and achieve overall temperature control.

[0059] Step 4. Heat absorption and dynamic regulation when the temperature exceeds the standard: When the liquid flow with a temperature exceeding the standard passes through the liquid flow cavity 402 of the temperature control box 4, the excess heat is transferred to the heat storage cavity 404 through the lower heat contact rod 503, and the heat phase change material absorbs the heat.

[0060] The temperature probe 701 continuously detects the temperature of the heat phase change material in the heat storage cavity 404. If the temperature exceeds the target temperature and the preset value, the lifter 11 raises the horizontal position of the first piston 501. The raised height difference △h1 is proportional to the difference △W1 (△W1 = W 超标 -W 目标 ) between the exceeded temperature and the target temperature.

[0061] When the temperature of the heat phase change material gradually drops to the target temperature, the lifter 11 gradually lowers the horizontal position of the first piston 501 to restore the initial heat contact area.

[0062] Step 5. Heat compensation and auxiliary heating when the temperature does not reach the standard: When the liquid flow with a temperature not reaching the standard passes through the liquid flow cavity 402 of the temperature control box 4, the qualified heat of the heat phase change material in the heat storage cavity 404 is transferred to the lower heat contact rod 503 through the upper heat contact rod 502 to compensate heat to the unqualified liquid flow.

[0063] The temperature probe 701 continuously detects the temperature of the heat phase change material in the heat storage cavity 404. If the temperature is lower than the target temperature, the lifter 11 raises the horizontal position of the first piston 501. The raised height difference △h2 is proportional to the difference △W2 (△W2 = W 目标 -W 未达标 ) between the target temperature and the unqualified temperature.

[0064] When the temperature of the heat phase change material gradually rises to the target temperature, the lifter 11 gradually lowers the horizontal position of the first piston 501 to restore the initial heat contact area.

[0065] In the present invention, the heat conduction member 5 (including the first piston 501, the upper heat contact rod 502, and the lower heat contact rod 503) adjusts the heat contact area through lifting to achieve rapid heat conduction and dynamic distribution.

[0066] The heat storage cavity 404 utilizes the phase change characteristics (melting heat absorption / solidification heat release) of the heat phase change material to buffer temperature fluctuations in real time.

[0067] The buffer tube 406 buffers the pressure change of the heat storage cavity 404 through the third piston 10 and the tension spring 6 to ensure the stable operation of the system.

[0068] The thermostat 7 combines the temperature probe 701 and the electronic heat exchange fin 702 to achieve precise monitoring and auxiliary regulation of the temperature of the thermal phase change material.

[0069] The method of the present invention significantly improves the temperature control accuracy and response speed of the mold temperature controller through the dual mechanisms of "PID overall regulation + thermal phase change micro-control compensation".

[0070] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mold temperature controller with series-connected linearized stepped temperature control, comprising a heating pipe (1) and an output liquid pipe (2) connected to the heating pipe (1). The output liquid pipe (2) is equipped with a temperature detector (3), and is characterized in that: The output liquid pipe (2) is further equipped with a temperature control box (4) located downstream of the temperature detector (3). The temperature control box (4) includes a heat insulation shell (401) and a guide plate (403) fixed inside the heat insulation shell (401). A heat conduction member (5) is inserted into the heat insulation shell (401). The heat conduction member (5) includes a first piston (501) that is in extrusion contact with the inner wall of the heat insulation shell (401). The interior of the heat insulation shell (401) includes a heat storage cavity (404) located between the first piston (501) and the guide plate (403), and the heat storage cavity (404) is filled with a heat phase change material; On the upper side of the first piston (501), there are multiple upper heat contact rods (502). The upper heat contact rods (502) vertically penetrate through the entire heat storage cavity (404) and move upward through the guide plate (403). On the lower side of the first piston (501), there are multiple lower heat contact rods (503). The bottoms of the multiple lower heat contact rods (503) are jointly connected to a second piston (504). A bottom cover (9) is fixedly installed on the bottom side of the heat insulation shell (401), and the bottom cover (9) is provided with a stroke cavity (901). The second piston (504) is arranged in the stroke cavity (901); Inside the heat insulation shell (401), there is a liquid flow cavity (402) located between the first piston (501) and the second piston (504), and the liquid flow cavity (402) is communicated with the output liquid pipe (2); Above the temperature control box (4), there is a lifter (11) for driving the heat conduction member (5) to vertically lift. A buffer pipe (406) is arranged on the circumferential side of the heat insulation shell (401), and the buffer pipe (406) is communicated with the heat storage cavity (404). A temperature controller (7) is arranged on the circumferential side of the heat insulation shell (401), and the temperature controller (7) includes a temperature probe (701) for detecting the temperature of the heat storage cavity (404).

2. The mold temperature controller with series-connected linearized stepped temperature control according to claim 1, characterized in that: The interior of the buffer pipe (406) is a buffer cavity (4061), and the buffer cavity (4061) is communicated with the heat storage cavity (404). A third piston (10) is arranged in the buffer cavity (4061). A sealing cover (407) is fixedly installed at the external port of the buffer pipe (406), and a tension spring (6) is arranged between the sealing cover (407) and the third piston (10).

3. The mold temperature controller with series-connected linearized stepped temperature control according to claim 1, characterized in that: Inside the heat insulation shell (401), there is an isolation cavity (405) located above the guide plate (403). The guide plate (403) is provided with multiple guide holes (4031), and the upper heat contact rods (502) penetrate through the guide holes (4031) and are inserted into the isolation cavity (405).

4. The mold temperature controller with series-connected linearized stepped temperature control according to claim 1, characterized in that: A drive rod (505) is fixedly connected to the center position on the upper side of the first piston (501), and the drive rod (505) is connected to the output end of the lifter (11).

5. The mold temperature controller with a series-connected linearized stepped temperature control according to claim 1, wherein: The average liquid flow cross-sectional area of the liquid flow chamber (402) is larger than the liquid flow cross-sectional area of the output liquid pipe. An inlet liquid flange (408) is provided on one side of the heat insulation shell (401), and an outlet liquid flange (409) is provided on the other side. The inlet liquid flange (408) and the outlet liquid flange (409) are communicated with the liquid flow chamber (402); Wherein, the average liquid flow cross-sectional area of the liquid flow chamber (402) is the ratio of the total volume of the liquid flow chamber (402) to the length of the liquid flow chamber (402) along the axial direction of the output liquid pipe.

6. The mold temperature controller with a series-connected linearized stepped temperature control according to claim 1, wherein: A first sealing groove (410) is formed on the top surface of the heat insulation shell (401), and a second sealing groove (902) is formed on the top surface of the bottom cover (9). Sealing rings (8) are arranged at the positions of the first sealing groove (410) and the second sealing groove (902).

7. The mold temperature controller with a series-connected linearized stepped temperature control according to claim 1, wherein: The first piston (501), the upper heat contact rod (502), and the lower heat contact rod (503) are made of the same heat-conducting material and are of an integrally formed structure. The bottom cover (9) and the second piston (504) are made of heat-insulating materials.

8. The mold temperature controller with a series-connected linearized stepped temperature control according to claim 1, wherein: The temperature controller (7) is further configured with an electronic heat exchanger (702) for assisting in regulating the temperature of the thermal phase change material in the heat storage chamber (404).

9. A series-connected linearized stepped temperature control method, characterized in that, Applied to the mold temperature controller with a series-connected linearized stepped temperature control according to any one of claims 1 to 8, it includes the following: S1. According to the target temperature, the horizontal position of the first piston (501) is adjusted through the lifter (11), and then the length of the upper heat contact rod (502) in the heat storage chamber (404) is adjusted; Wherein, the higher the target temperature, the lower the horizontal position of the first piston (501), the longer the length of the upper heat contact rod (502) in the heat storage chamber (404), and the larger the direct contact area between the upper heat contact rod (502) and the thermal phase change material; Wherein, the lower the target temperature, the higher the horizontal position of the first piston (501), the shorter the length of the upper heat contact rod (502) in the heat storage chamber (404), and the smaller the direct contact area between the upper heat contact rod (502) and the thermal phase change material; S2. Start the mold temperature controller. After the liquid is heated by the heating pipe (1), it reaches the temperature detector (3) through the output liquid pipe (2). When the temperature detector (3) detects that the liquid flow temperature output by the output liquid pipe (2) is stable at the set target temperature, the external output valve is opened to supply heat to the mold; S3. When the liquid flow temperature output by the output liquid pipe (2) fluctuates, the temperature detector (3) detects the temperature fluctuation signal, and the control system feedback-regulates the heating pipe (1) through the PID strategy to control the subsequent output liquid flow temperature; When the liquid flow with an excessive temperature passes through the liquid flow cavity (402) of the temperature control box (4), the excessive heat is transferred to the heat storage cavity (404) through the lower heat contact rod (503), and the heat phase change material in the heat storage cavity (404) absorbs the excessive heat; Meanwhile, the temperature probe (701) detects the real-time temperature of the heat phase change material in the heat storage cavity (404). When the real-time temperature of the heat phase change material exceeds the target temperature, that is, the real-time temperature is the excessive temperature, the lifter (11) raises the horizontal position of the first piston (501). The height difference △h1 of the raise is proportional to △W1, where △W1 is the difference between the excessive temperature and the target temperature. At this time, the excessive temperature is greater than the target temperature; When the temperature of the heat phase change material gradually decreases to the target temperature, the lifter (11) gradually lowers the horizontal position of the first piston (501) downward; S5. When the liquid flow with a substandard temperature passes through the liquid flow cavity (402) of the temperature control box (4), the qualified heat of the heat phase change material in the heat storage cavity (404) is transferred from the upper heat contact rod (502) to the lower heat contact rod (503) to quickly compensate the heat for the liquid flow with an unqualified temperature; The temperature probe (701) detects the real-time temperature of the heat phase change material in the heat storage cavity (404). When the real-time temperature of the heat phase change material is lower than the target temperature, that is, the real-time temperature is the unqualified temperature, the lifter (11) raises the horizontal position of the first piston (501). The height difference △h2 of the raise is proportional to △W2, where △W2 is the difference between the target temperature and the unqualified temperature and the target temperature is greater than the unqualified temperature; When the temperature of the heat phase change material gradually rises to the target temperature, the lifter (11) gradually lowers the horizontal position of the first piston (501) downward to restore the initial heat contact area.

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