A mold temperature controller and method with series-connected linearized stepped temperature control

Abstract

The present invention relates to the technical field of mold temperature controller equipment, and discloses a mold temperature controller and method for serial linear step temperature control. In the present invention, the mold temperature controller includes a heating tube, an output liquid tube and a temperature control box. The temperature control box is provided with a heat storage cavity and filled with a thermal phase change material. The position of the heat conductor is adjusted by a lifter to change the contact area between the upper heat contact rod and the thermal phase change material, combined with real-time monitoring and auxiliary heating by a temperature controller. The supporting method of the present invention realizes temperature control by matching the contact area with the target temperature, PID controlling the heating tube, and dynamically compensating the heat of the thermal phase change material. Through the dual mechanism of "PID overall control + thermal phase change micro-control compensation", the temperature control accuracy and response speed are improved, and fluctuations are reduced. It is suitable for the temperature control requirements of high-precision mold processing.

Description

Technical Field

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

[0002] During the mold manufacturing process, the temperature control accuracy of the mold temperature controller plays a vital role in the quality and production efficiency of the mold. Traditional mold temperature controllers mainly heat the oil temperature through heating tubes and use water cooling to adjust the temperature, but this method has obvious lag. Specifically, when the temperature signal is generated, the system needs to adjust the temperature according to the requirements of the temperature signal. However, in this process, adverse temperature factors have already occurred, such as excessively high or low temperatures. This will have an undue impact on mold production, resulting in deviations in the mold's dimensional accuracy and surface quality. It may even cause damage to the mold or production stagnation, seriously affecting production efficiency and product quality.

[0003] Existing methods primarily rely on PID control to comprehensively control temperature factors. While PID control can regulate temperature to a certain extent, it primarily relies on system errors, and there is still a certain lag in its response to temperature fluctuations. This is especially true when faced with complex temperature fluctuations, making it difficult to achieve high-precision temperature control solely through PID control. Furthermore, traditional PID control is less than ideal when dealing with subtle temperature fluctuations and rapid changes, and is prone to temperature overshoot or prolonged regulation times, making it unable to meet the stringent temperature control requirements of high-precision mold manufacturing.

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

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

[0006] The present invention provides a mold temperature controller with serial linearized step temperature control, comprising a heating tube, an output liquid pipe connected to the heating tube, a temperature detector configured in the output liquid pipe, and a temperature control box located downstream of the temperature detector. The temperature control box comprises an insulating shell and a guide plate fixed within the insulating shell. A heat conductor is inserted within the insulating shell, the heat conductor comprising a first piston in compression contact with the inner wall of the insulating shell. The insulating shell comprises a heat storage chamber located between the first piston and the guide plate, and the heat storage chamber is filled with a thermal phase change material.

[0007] A plurality of upper thermal contact rods are provided on the upper side of the first piston. These rods extend vertically through the entire heat storage chamber and move upward through the guide plate. A plurality of lower thermal contact rods are provided on the lower side of the first piston. The bottom ends of the lower thermal contact rods are connected to the second piston. A bottom cover is fixedly mounted on the bottom side of the insulation shell. The bottom cover defines a travel chamber, and the second piston is disposed within the travel chamber.

[0008] The insulating shell includes a liquid flow chamber located between the first and second pistons, which is connected to the output liquid pipe. A lifter is located above the temperature control box to vertically raise and lower the heat conductor. A buffer tube is located on the annular side of the insulating shell and is connected to the heat storage chamber. A thermostat is located on the annular side of the insulating shell and includes a temperature probe for detecting the temperature of the heat storage chamber.

[0009] As a preferred technical solution of the present invention: the inside of the cache tube is a cache cavity, the cache cavity is connected to the heat storage cavity, a third piston is arranged in the cache cavity, a cover is fixedly installed on the external port of the cache tube, and a tension spring is arranged between the cover and the third piston.

[0010] As a preferred technical solution of the present invention: an isolation cavity is provided inside the thermal insulation shell above the guide plate, the guide plate is provided with a plurality of guide holes, and the upper thermal contact rod passes through the guide holes and is inserted into the isolation cavity.

[0011] As a preferred technical solution of the present invention: the center 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 lifter.

[0012] As a preferred technical solution of the present invention, the average liquid flow cross-sectional area of the liquid flow chamber 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 insulating shell, and a liquid outlet flange is provided on the other side. The liquid inlet and outlet flanges are in communication with the liquid flow chamber. The average liquid flow cross-sectional area of the liquid flow chamber is the ratio of the total volume of the liquid flow chamber to the axial length of the liquid flow chamber along 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 insulation shell, a second sealing groove is provided on the top surface of the bottom cover, and sealing rings are provided 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 thermal contact rod and the lower thermal contact rod are made of the same heat-conducting material and are integrally formed, and the bottom cover and the second piston are made of heat-insulating material.

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

[0016] The present invention provides a series linear step temperature control method, comprising the following contents:

[0017] S1. Based on the target temperature, adjust the horizontal position of the first piston via the lifter, thereby adjusting the length of the upper thermal contact rod in the heat storage chamber. Specifically, the higher the target temperature, the lower the horizontal position of the first piston, the longer the upper thermal contact rod in the heat storage chamber, and the greater the direct contact area between the upper thermal contact rod and the thermal phase change material. Specifically, the lower the target temperature, the higher the horizontal position of the first piston, the shorter the upper thermal contact rod in the heat storage chamber, and the smaller the direct contact area between the upper thermal contact rod and the thermal phase change material.

[0018] S2. Start the mold temperature controller. After the liquid is heated by the heating tube, it reaches the temperature detector through the output liquid pipe. When the temperature detector detects that the temperature of the liquid 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 by the output liquid pipe fluctuates, the temperature detector detects the temperature fluctuation signal, and the control system uses the PID strategy feedback to regulate the heating pipe to control the subsequent output liquid flow temperature.

[0020] S4. When a liquid with an excessive temperature passes through the liquid flow chamber of the temperature control box, the excess heat is transferred to the heat storage chamber via the lower thermal contact rod, where the thermal phase change material absorbs the excess heat. Simultaneously, a temperature probe detects the real-time temperature of the thermal phase change material in the heat storage chamber, indicating that the real-time temperature is the excessive temperature. When the real-time temperature of the thermal phase change material exceeds the target temperature, the lifter raises the horizontal position of the first piston upward. The height difference △h1 is proportional to △W1, which is the difference between the excessive temperature and the target temperature. At this point, the excessive temperature is greater than the target temperature. As the temperature of the thermal phase change material gradually decreases to the target temperature, the lifter gradually lowers the horizontal position of the first piston downward.

[0021] S5. When a liquid flow that does not meet the temperature standard passes through the liquid flow chamber of the temperature control box, the heat of the thermal phase change material in the heat storage chamber that meets the standard is transferred to the lower thermal contact rod via the upper thermal contact rod, quickly compensating the heat for the liquid flow that does not meet the temperature standard. The temperature probe detects the real-time temperature of the thermal phase change material in the heat storage chamber. When the real-time temperature of the thermal phase change material is lower than the target temperature, that is, the real-time temperature is the substandard temperature, the lifter raises the horizontal position of the first piston upward. The height difference △h2 is proportional to △W2. △W2 is the difference between the target temperature and the substandard temperature, and the target temperature is greater than the substandard temperature. As the temperature of the thermal 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 thermal 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, the present invention connects a dynamic thermal compensation mechanism based on thermal phase change material 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 supplementary micro-control of the thermal phase change, the liquid flow temperature can be controlled more accurately, the temperature fluctuation is effectively reduced, and the temperature control accuracy of the mold temperature controller's output liquid flow is improved, providing a reliable temperature foundation 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 or falls below the standard, the temperature control box can react quickly and, based on its own temperature status, promptly adjust the degree of external heat exchange to prevent its own adverse conditions from interfering with the temperature of the liquid flow output from the output liquid pipe. When the liquid flow with an excessive temperature passes through the temperature control box, the excess heat can be quickly transferred to the thermal phase change material in the heat storage chamber via the lower thermal contact rod, and the thermal phase change material absorbs the excess heat. When the liquid flow with a temperature that falls below the standard passes through the temperature control box, the heat that meets the standard in the thermal phase change material in the heat storage chamber can be transferred to the lower thermal contact rod via the upper thermal contact rod, quickly compensating the heat for the liquid flow with a temperature that falls below the standard. This significantly shortens the temperature adjustment time and improves the system's response speed 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 for Figure 1 Schematic diagram of the structure with a partial enlargement at point A in the middle.

[0027] Figure 3 for Figure 2 Schematic diagram of the structure with a partial enlargement at point B.

[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 This is a schematic diagram of the disassembled structure of the temperature control box and related components in the present invention.

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

[0031] Figure 7 Schematic diagram of the structure of the heat conductor in the present invention.

[0032] Figure 8 Schematic diagram of the structure of the bottom cover of the present invention.

[0033] Among them: 1-heating tube; 2-output liquid pipe; 3-temperature detector; 4-temperature control box, 401-insulating shell, 402-liquid flow chamber, 403-guide plate, 4031-guide hole, 4032-center hole, 404-heat storage chamber, 405-air separation chamber, 406-cache tube, 4061-cache chamber, 407-sealing cover, 408-liquid inlet flange, 409-liquid outlet flange, 410-first sealing groove; 5-heat conductor, 501-first piston, 502-upper thermal contact rod, 503-lower thermal contact rod, 504-second piston, 505-driving rod; 6-tension spring; 7-temperature controller, 701-temperature probe, 702-electronic heat exchange plate; 8-sealing ring; 9-bottom cover, 901-stroke chamber, 902-second sealing groove; 10-third piston; 11-lifter. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, 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 intended to limit the present invention.

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

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

[0037] Temperature detector 3: Figure 1 、 Figure 2 , installed on output liquid pipe 2, monitors the temperature of the output liquid in real time. When the liquid temperature stabilizes at the set target, a signal is fed back to the control system, causing the external output valve to open and supply heat to the mold. If temperature fluctuations are detected, the PID control mechanism is triggered.

[0038] The temperature control box 4 is a key component for achieving linear step temperature control. Its internal structure and working principle are as follows:

[0039] Insulation shell 401: Figure 4 、 Figure 5 、 Figure 6 、 Figure 8 The main structure of the temperature control box 4 is formed with multiple functional chambers inside, and a buffer tube 406 and a temperature controller 7 are arranged outside. A first sealing groove 410 is defined on the top surface of the insulating shell 401, and the bottom side is sealed by a bottom cover 9. A second sealing groove 902 is defined on the top surface of the bottom cover 9. Sealing rings 8 are installed in both the first sealing groove 410 and the second sealing groove 902 to ensure the sealing of each chamber and prevent liquid leakage and heat loss.

[0040] Guide plate 403: Figure 3 、 Figure 6 , fixed within the insulating shell 401, dividing the interior of the insulating shell 401 into an upper air chamber 405 and a lower liquid flow chamber 402 and heat storage chamber 404. The guide plate 403 is provided with a plurality of guide holes 4031 for guiding the vertical movement of the upper thermal contact rod 502; a center hole 4032 is provided at the center for mounting the drive rod 505.

[0041] Heat conducting element 5: Figure 2 、 Figure 6 、 Figure 7 , including a first piston 501, an upper thermal contact rod 502, a lower thermal contact rod 503 and a second piston 504, wherein the first piston 501, the upper thermal contact rod 502 and the lower thermal contact rod 503 are made of the same heat-conducting material and an integrally formed structure to ensure rapid heat conduction.

[0042] The bottom cover 9 and the second piston 504 are made of insulating material to prevent heat transfer between the liquid flow chamber 402 and the stroke chamber 901. The first piston 501 is in compression contact with the inner wall of the insulating shell 401, dividing the interior of the insulating shell 401 into an upper heat storage chamber 404 and a lower liquid flow chamber 402. The upper thermal contact rod 502 vertically penetrates the entire heat storage chamber 404 and moves upward through the guide hole 4031 to be inserted into the isolation chamber 405. The bottom end of the lower thermal contact rod 503 is fixedly connected to the second piston 504. The second piston 504 is disposed in the stroke chamber 901 of the bottom cover 9 and can move up and down within the stroke chamber 901, thereby driving the thermal conductor 5 to rise and fall vertically as a whole.

[0043] Heat storage chamber 404: Figure 2 、 Figure 3 、 Figure 4 Located between the first piston 501 and the guide plate 403, the upper thermal contact rod 502 is filled with a thermal phase change material (such as phase change wax or molten salt). This material utilizes its phase change process (melting absorbs heat, solidification releases heat) to store and release heat, thereby dynamically compensating for the fluid temperature. The contact area between the upper thermal contact rod 502 and the thermal phase change material can be varied by adjusting the position of the first piston 501, thereby controlling the heat transfer efficiency.

[0044] Liquid flow chamber 402: Figure 2 、 Figure 4 、 Figure 6 , located between the first piston 501 and the second piston 504, and connected to the output liquid pipe (liquid inlet flange 408 and liquid outlet flange 409). 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, which can reduce the liquid flow velocity, extend the liquid flow's residence time within the temperature-controlled box 4, and improve heat exchange efficiency.

[0045] Lifter 11: Figure 2 、 Figure 7 , is arranged above the temperature control box 4, and the output end is fixedly connected to the driving rod 505 (the driving rod 505 is fixed at the upper center position of the first piston 501), which is used to drive the heat guide 5 to move vertically up and down, thereby adjusting the length of the upper heat contact rod 502 in the heat storage chamber 404 and the contact area with the thermal phase change material.

[0046] Cache tube 406: Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 The ring side is arranged on the insulating shell 401, and the interior is a cache chamber 4061 connected to the heat storage chamber 404. The third piston 10 is arranged in the cache chamber 4061, and the external port of the cache tube 406 is closed by a cover 407. A tension spring 6 is installed between the cover 407 and the third piston 10.

[0047] When the thermal phase-change material expands due to heat, the pressure within heat storage chamber 404 increases, pushing third piston 10 to compress tension spring 6, transferring some of the volume to buffer chamber 4061 and relieving internal pressure. When the thermal phase-change material cools and contracts, tension spring 6 pushes third piston 10 back to its original position, replenishing the volume and maintaining pressure equilibrium. This design effectively prevents component damage caused by pressure fluctuations and extends the service life of the device.

[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 thermal phase change material in the heat storage chamber 404. The electronic heat exchanger 702 can be activated when the temperature of the thermal phase change material is lower than the target temperature, providing heat to the thermal phase change material to help maintain a stable temperature. The electronic heat exchanger 702 can also be activated when the temperature of the thermal phase change material exceeds the target temperature, absorbing heat from the thermal phase change material and discharging it to help maintain a stable temperature.

[0049] This invention builds on traditional PID temperature control by integrating a temperature control box 4 (a dynamic thermal compensation mechanism based on a thermal phase change material) in series downstream of the liquid output pipe 2. When the liquid temperature fluctuates, the PID controller provides overall control of the power to the heating pipe 1, while the temperature control box 4 compensates for temperature fluctuations through the heat absorption or release of the thermal phase change material. This creates a gradient, sequential control mode combining "overall PID control with micro-compensation through thermal phase change."

[0050] This invention overcomes the lag in traditional PID control's response to temperature fluctuations, particularly when dealing with subtle fluctuations and rapid changes. The thermal phase change material absorbs and releases heat in real time, shortening temperature adjustment time and improving response speed. This dual control of fluid flow temperature significantly reduces temperature overshoot and excessive adjustment time, elevating temperature control accuracy to a higher level and meeting the stringent temperature stability requirements of high-precision mold manufacturing.

[0051] In the present invention, Figure 2 、 3 , 4, 7. The lifter 11 adjusts the horizontal position of the first piston 501, changing the length of the upper thermal contact rod 502 within the heat storage chamber 404, thereby adjusting the direct contact area between the upper thermal 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 upper thermal contact rod 502 is inserted into the heat storage chamber 404, and the larger the contact area, the higher the heat transfer efficiency, and the more heat can be stored. Conversely, the lower the target temperature, the smaller the contact area, preventing excessive heat transfer.

[0052] This invention dynamically optimizes the heat transfer process, enabling the mold temperature controller to automatically adjust its heat exchange capacity based on different target temperatures, improving the flexibility and accuracy of temperature control. For example, at high temperatures, increasing the contact area can quickly absorb excess heat from the fluid flow; at low temperatures, reducing the contact area can prevent excessive heat release from the thermal phase change material, thus preventing the fluid flow from cooling too low.

[0053] Example 2: The present invention designs a mold temperature controller series linear step temperature control method, the specific method is as follows:

[0054] Step 1: Matching the target temperature to the thermal contact area: Based on the target temperature, the horizontal position of the first piston 501 is adjusted by the lifter 11, thereby adjusting the length of the upper thermal 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 upper heat contact rod 502 in the heat storage chamber 404, and the greater the direct contact area between the upper heat contact rod 502 and the thermal phase change material, thereby improving the heat transfer efficiency and storing more heat.

[0056] The lower the target temperature, the higher the horizontal position of the first piston 501 is, the shorter the upper heat contact rod 502 in the heat storage chamber 404 is, and the smaller the direct contact area between the upper heat contact rod 502 and the thermal phase change material is, thus avoiding excessive heat transfer.

[0057] Step 2: Initial heating and stable temperature output: Start the mold temperature controller. After the liquid is heated by the heating tube 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 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 to control the heating tube: When the temperature detector 3 detects that the output liquid flow temperature fluctuates, the control system controls the heating tube 1 through PID strategy feedback, adjusts the temperature of the subsequent output liquid flow, and realizes overall temperature control.

[0059] Step 4: Heat absorption and dynamic adjustment when the temperature exceeds the standard: When the liquid flow with excessive temperature 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 thermal phase change material absorbs the heat.

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

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

[0062] Step 5: Thermal compensation and auxiliary heating when the temperature does not meet the standard: When the liquid flow with a temperature that does not meet the standard passes through the liquid flow chamber 402 of the temperature control box 4, the heat of the thermal phase change material in the heat storage chamber 404 that meets the standard is transferred to the lower thermal contact rod 503 through the upper thermal contact rod 502 to compensate the heat for the liquid flow that does not meet the standard.

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

[0064] When the temperature of the thermal 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 thermal contact area.

[0065] In the present invention, the heat conducting 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 by lifting and lowering, thereby achieving rapid heat conduction and dynamic distribution.

[0066] The heat storage chamber 404 utilizes the phase change characteristics of the thermal phase change material (melting absorbs heat / solidifying releases heat) to buffer temperature fluctuations in real time.

[0067] The cache tube 406 buffers the pressure changes in the heat storage chamber 404 through the third piston 10 and the tension spring 6 to ensure stable operation of the system.

[0068] The temperature controller 7 combines the temperature probe 701 and the electronic heat exchange plate 702 to achieve accurate monitoring and auxiliary control 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 mechanism of "PID overall regulation + thermal phase change micro-control compensation".

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mold temperature controller with serial linear step temperature control, comprising a heating tube (1), an output liquid tube (2) connected to the heating tube (1), the output liquid tube (2) being provided with a temperature detector (3), characterized in that: The output liquid pipe (2) is further provided with a temperature control box (4) located downstream of the temperature detector (3), the temperature control box (4) comprising an insulating shell (401), a guide plate (403) fixed inside the insulating shell (401), a heat conductor (5) inserted into the insulating shell (401), the heat conductor (5) comprising a first piston (501) in compression contact with the inner wall of the insulating shell (401), the insulating shell (401) comprising a heat storage chamber (404) located between the first piston (501) and the guide plate (403), the heat storage chamber (404) being filled with a thermal phase change material; A plurality of upper thermal contact rods (502) are provided on the upper side of the first piston (501), the upper thermal contact rods (502) vertically penetrate the entire heat storage chamber (404) and move upward through the guide plate (403), a plurality of lower thermal contact rods (503) are provided on the lower side of the first piston (501), the bottom ends of the plurality of lower thermal contact rods (503) are commonly connected to the second piston (504), a bottom cover (9) is fixedly mounted on the bottom side of the thermal insulation shell (401), the bottom cover (9) is provided with a stroke chamber (901), and the second piston (504) is arranged in the stroke chamber (901); The heat-insulating shell (401) includes a liquid flow chamber (402) located between the first piston (501) and the second piston (504), and the liquid flow chamber (402) is connected to the output liquid pipe (2); A lifter (11) for driving the heat conductor (5) to vertically lift is arranged above the temperature control box (4); a buffer tube (406) is arranged on the ring side of the heat insulating shell (401); the buffer tube (406) is connected to the heat storage chamber (404); a temperature controller (7) is arranged on the ring side of the heat insulating shell (401); the temperature controller (7) includes a temperature probe (701) for detecting the temperature of the heat storage chamber (404).

2. The serial linearized step temperature control mold temperature controller according to claim 1, characterized in that: The cache tube (406) has a cache cavity (4061) inside, which is communicated with the heat storage cavity (404). A third piston (10) is arranged in the cache cavity (4061). A cover (407) is fixedly installed on the external port of the cache tube (406), and a tension spring (6) is arranged between the cover (407) and the third piston (10).

3. The serial linearized step temperature control mold temperature controller according to claim 1, characterized in that: The insulating shell (401) is provided with an isolation cavity (405) located above the guide plate (403). The guide plate (403) is provided with a plurality of guide holes (4031). The upper thermal contact rod (502) passes through the guide holes (4031) and is inserted into the isolation cavity (405).

4. The serial linearized step temperature control mold temperature controller according to claim 1, characterized in that: The center position on the upper side of the first piston (501) is fixedly connected to a driving rod (505), and the driving rod (505) is connected to the output end of the lifter (11).

5. The serial linearized step temperature control mold temperature controller according to claim 1, characterized in that: The average liquid flow cross-sectional area of the liquid flow cavity (402) is larger than the liquid flow cross-sectional area of the liquid output pipe; a liquid inlet flange (408) is provided on one side of the thermal insulation shell (401), and a liquid outlet flange (409) is provided on the other side; the liquid inlet flange (408) and the liquid outlet flange (409) are in communication with the liquid flow cavity (402); The average liquid flow cross-sectional area of the liquid flow cavity (402) is the ratio of the total volume of the liquid flow cavity (402) to the axial length of the liquid flow cavity (402) along the output liquid pipe.

6. The serial linearized step temperature control mold temperature controller according to claim 1, characterized in that: A first sealing groove (410) is formed on the top surface of the heat-insulating shell (401), and a second sealing groove (902) is formed on the top surface of the bottom cover (9). Sealing rings (8) are provided at the positions of the first sealing groove (410) and the second sealing groove (902).

7. The serial linearized step temperature control mold temperature controller according to claim 1, characterized in that: The first piston (501), the upper thermal contact rod (502), and the lower thermal contact rod (503) are made of the same heat-conducting material and are an integrally formed structure, and the bottom cover (9) and the second piston (504) are made of a heat-insulating material.

8. The serial linearized step temperature control mold temperature controller according to claim 1, characterized in that: The temperature controller (7) is further configured with an electronic heat exchange plate (702) for assisting in regulating the temperature of the thermal phase change material in the heat storage cavity (404).

9. A serial linear step temperature control method, characterized in that: A mold temperature controller with serial linearized step temperature control applied to any one of claims 1 to 8, comprising the following contents: S1. According to the target temperature, the horizontal position of the first piston (501) is adjusted by the lifter (11), thereby adjusting the length of the upper heat contact rod (502) in the heat storage chamber (404); The higher the target temperature, the lower the horizontal position of the first piston (501), the longer the length of the upper thermal contact rod (502) in the heat storage chamber (404), and the greater the direct contact area between the upper thermal contact rod (502) and the thermal phase change material; The lower the target temperature, the higher the horizontal position of the first piston (501), the shorter the length of the upper thermal contact rod (502) in the heat storage chamber (404), and the smaller the direct contact area between the upper thermal 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 temperature of the liquid output from the output liquid pipe (2) is stable at the set target temperature, the external output valve opens to supply heat to the mold. S3. When the temperature of the liquid output from the output liquid pipe (2) fluctuates, the temperature detector (3) detects the temperature fluctuation signal, and the control system controls the heating pipe (1) through PID strategy feedback to control the subsequent output liquid temperature; S4. When the liquid flow with excessive temperature passes through the liquid flow chamber (402) of the temperature control box (4), the excessive heat is transferred to the heat storage chamber (404) through the lower heat contact rod (503), and the thermal phase change material in the heat storage chamber (404) absorbs the excessive heat; At the same time, the temperature probe (701) detects the real-time temperature of the thermal phase change material in the heat storage chamber (404). When the real-time temperature of the thermal phase change material exceeds the target temperature, that is, the real-time temperature is an over-standard temperature, the lifter (11) raises the horizontal position of the first piston (501) upward, and the height difference △h1 is proportional to △W1. △W1 is the difference between the over-standard temperature and the target temperature. At this time, the over-standard temperature is greater than the target temperature. When the temperature of the thermal phase change material gradually decreases to the target temperature, the lifter (11) gradually lowers the horizontal position of the first piston (501); S5. When the liquid flow with a temperature that does not meet the standard passes through the liquid flow chamber (402) of the temperature control box (4), the heat of the thermal phase change material in the heat storage chamber (404) that meets the standard is transferred to the lower thermal contact rod (503) through the upper thermal contact rod (502), and the heat is quickly compensated for the liquid flow with a temperature that does not meet the standard; The temperature probe (701) detects the real-time temperature of the thermal phase change material in the heat storage chamber (404). When the real-time temperature of the thermal phase change material is lower than the target temperature, that is, the real-time temperature is a non-standard temperature, the lifter (11) raises the horizontal position of the first piston (501) upward, and the height difference △h2 is proportional to △W2, △W2 is the difference between the target temperature and the non-standard temperature, and the target temperature is greater than the non-standard temperature; When the temperature of the thermal 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 thermal contact area.

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