Self-adaptive heating method for vulcanizing machine mold

Abstract

The invention provides a self-adaptive heating method for a vulcanizing machine mold, which comprises the following steps of: comparing data acquired after mold opening with a threshold value preset in a system to judge whether an electric heating device performs compensation heating or basic heating on the mold so as to ensure that the temperature in the mold is always kept at a tire mounting temperature in the mold opening and standby processes of the mold; when the tire is replaced or production conditions are recovered, the tire is directly vulcanized without additional heating. By means of compensation heating in the circulating vulcanization process and high-temperature preheating of the cold mold, variable-temperature heating of the mold in the whole tire vulcanization production process is achieved, and the tire vulcanization efficiency is effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of tire vulcanization equipment, and more particularly to an adaptive heating method for a mold of a tire vulcanizer. Background Art

[0002] During the vulcanization process of passenger car or truck tires, it is necessary to heat a mold that can be opened and closed so that the temperature inside the mold reaches a certain tire loading temperature before a green tire (a tire that has not been vulcanized) can be loaded for tire vulcanization. If the vulcanizer opens and stands by (the opening of the mold in the present invention refers to the opening of the mold) within a short period of time, the temperature inside the mold will gradually decrease due to heat dissipation when the mold is opened. The current common practice is to wait until the production conditions are restored, then heat the mold until the temperature inside the mold reaches the tire loading temperature, and then load the green tire and perform vulcanization. This process takes a certain amount of time. If the downtime is longer or the number of shutdowns is more, the time for reheating is also more, which means that there is a waste of time during the production vulcanization process, resulting in low tire vulcanization efficiency. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides an adaptive heating method for a vulcanizer mold. The vulcanizer includes a mold and an electric heating device for heating the mold. The adaptive heating method includes the following steps: S1: Preheat a mold that has been shut down for a long time or a newly replaced mold through the electric heating device to raise the temperature of the mold to a basic heating temperature C; S2: Place a green tire in a closed mold cavity for vulcanization; S3: When the mold is opened and the tire is unloaded after the vulcanization of the green tire is completed, the control system performs data acquisition; S4: The control system compares the collected data with a preset threshold value and determines whether to perform compensation heating; when it is determined that compensation heating is required, the control system controls the electric heating device to increase the mold temperature by a first temperature compensation value C1 on the basis of the basic heating temperature C; when it is determined that compensation heating is not required, the control system controls the electric heating device to maintain the basic heating temperature C to heat the mold; S5: Stop data acquisition and place a new green tire in a closed mold cavity for vulcanization, and repeat the steps of S3 and S4 to keep the mold at the basic heating temperature C required for vulcanization.

[0004] Preferably, in S3, the data acquisition is time acquisition, and in S4, the threshold is a time threshold. The control system starts timing when the current green tire is demolded after vulcanization is completed, and compares the time used until the next green tire is placed in the closed mold cavity with the time threshold preset by the control system. When the acquired time is greater than the time threshold, compensation heating is performed, and the control system controls the electric heating device to increase the mold temperature by a first temperature compensation value C1 on the basis of the basic heating temperature C; when the acquired time is less than the time threshold, basic heating is performed, and the control system controls the electric heating device to heat the mold at the basic heating temperature C.

[0005] Preferably, in S3, the data acquisition is mold temperature acquisition, and in S4, the threshold is a temperature threshold. The control system compares the mold temperature after the current green tire is demolded and vulcanized with the temperature threshold preset by the control system. When the mold temperature is less than the temperature threshold, compensation heating is performed, and the control system controls the electric heating device to increase the mold temperature by a first temperature compensation value C1 on the basis of the basic heating temperature C; when the mold temperature is greater than the temperature threshold, basic heating is performed, and the control system controls the electric heating device to heat the mold at the basic heating temperature C.

[0006] Preferably, the electric heating device includes a first heating unit disposed at the top of the mold, a second heating unit disposed at the bottom of the mold, and a plurality of third heating units. The plurality of third heating units are disposed around the circumference of the mold. The control system of the vulcanizer controls any one or more of the first heating unit, the second heating unit, and the third heating units to perform basic heating or compensation heating.

[0007] Preferably, a plurality of upper heating regions are provided on the first heating unit, and the control system controls any plurality of upper heating regions to perform basic heating or compensation heating.

[0008] Preferably, a plurality of lower heating regions are provided on the second heating unit, and the control system controls any plurality of lower heating regions to perform basic heating or compensation heating.

[0009] Preferably, when the acquired time is from 0 to 5 minutes, the first temperature compensation value C1 is 0; when the acquired time is from 5 to 10 minutes, the first temperature compensation value C1 is 2 to 3 degrees Celsius; when the acquired time is from 10 to 15 minutes, the first temperature compensation value C1 is 3 to 5 degrees Celsius; when the acquired time is from 15 to 20 minutes, the first temperature compensation value C1 is 5 to 8 degrees Celsius; when the acquired time is greater than 20 minutes, the first temperature compensation value C2 is 8 to 10 degrees Celsius.

[0010] Preferably, when the range of the mold temperature lower than the temperature threshold is between 0 and 0.5 degrees Celsius, the first temperature compensation value C1 is 0; when the range of the mold temperature lower than the temperature threshold is between 0.5 and 1 degree Celsius, the first temperature compensation value C1 is between 1 and 2 degrees Celsius; when the range of the mold temperature lower than the temperature threshold is between 1 and 2 degrees Celsius, the first temperature compensation value C1 is between 2 and 3 degrees Celsius.

[0011] Preferably, the preheating of the mold in S1 is high-temperature preheating, where the high-temperature preheating is that the control system controls the electric heating device to increase the second temperature compensation value C2 on the basis of the basic heating temperature C to heat the mold.

[0012] Preferably, the range of the second temperature compensation value C2 is from 0 to 30 degrees Celsius.

[0013] It can be seen from the above disclosed technical content that the present invention mainly provides an adaptive heating method for a vulcanizer mold. By comparing the data collected after mold opening with the thresholds preset in the system, it is determined whether the electric heating device performs compensation heating or basic heating on the mold, so as to ensure that the temperature in the mold always remains at the tire mounting temperature during the mold opening and standby processes. When the tire is replaced or the production conditions are restored, direct vulcanization of the tire can be carried out without additional heating. Through the compensation heating during the cyclic vulcanization process and the high-temperature preheating of the cold mold, variable-temperature heating of the mold during the entire tire vulcanization production process is achieved, effectively improving the vulcanization efficiency of the tire. Description of the Drawings

[0014] Figure 1 Schematic diagram of the vulcanizer main body with a mold having mold opening and closing and an electric heating device according to the present invention.

[0015] Figure 2 Schematic diagram of the connection between the mold and the first temperature measuring element in the vulcanizer main body according to the present invention.

[0016] Figure 3 Flowchart of the first embodiment of the mold adaptive heating method according to the present invention.

[0017] Figure 4 Flowchart of the second embodiment of the mold adaptive heating method according to the present invention.

[0018] Figure 5 Schematic diagram of the first heating unit according to the present invention. Embodiments

[0019] Hereinafter, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings.

[0020] The mold opening and standby during the tire vulcanization process described in the present invention refer to the mold opening and waiting for a new green tire to be loaded into the mold during the process of unloading a tire after vulcanization and replacing it with a new green tire. The time that may be consumed mainly includes: the operator cannot timely replace the green tire after tire vulcanization; the production is waiting for materials when the upstream process cannot timely provide the green tire; or equipment maintenance, etc.

[0021] The applicant studied the temperature measurement of the mold during mold opening and standby through the first temperature measuring element 101 and found that during the mold opening and standby process, the mold is heated at the basic heating temperature C by the electric heating device. As time increases, the speed at which the mold loses temperature during the heat dissipation process is greater than the speed at which the mold gains temperature during the heating process. Specifically, as Figure 2 shown, taking the basic heating temperature C as 175 °C as an example, the first temperature measuring element 101 is electrically connected to multiple places on the inner surface of the mold through a plurality of wires L. Preferably, the first temperature measuring element is a paperless thermometer. The obtained data is shown in Table 1 below. The temperature at multiple positions inside the mold in Table 1 refers to the temperature measured at 8 different positions inside the mold; the temperature during preheating refers to the temperature at each position inside the mold when the tire loading condition is reached after preheating; the temperature 5 minutes after mold opening refers to the temperature at each position inside the mold 5 minutes after mold opening and standby after preheating; the temperature 10 minutes after mold opening refers to the temperature at each position inside the mold 10 minutes after mold opening and standby after preheating; the temperature 15 minutes after mold opening refers to the temperature at each position inside the mold 15 minutes after mold opening and standby after preheating; the temperature 20 minutes after mold opening refers to the temperature at each position inside the mold 20 minutes after mold opening and standby after preheating. During this process, the electric heating device always maintains heating the mold at the basic heating temperature of 175 °C. It can be seen from the data in Table 1 that during the mold opening and standby process, even if the mold is heated at the basic heating temperature C, the temperature inside the mold will still decrease, and as the time of mold opening and standby extends, the temperature inside the mold decreases more.

[0022]

[0023] Based on this, the present invention discloses a method for adaptively heating the mold of a vehicle tire vulcanizer, as Figures 1 to 5As shown in the figure, the vulcanizer includes a mold 10, the mold 10 includes an upper mold 11 and a lower mold 12. After the upper mold 11 and the lower mold 12 are closed, a vulcanization chamber QS for accommodating a vulcanization bladder JN is formed. An electric heating device for heating the mold 10 is provided outside the mold 10. The adaptive heating method of the mold includes the following steps: When the vulcanizer stops production for a long time and then resumes production or after replacing the mold, the cold mold needs to be preheated first; When the mold is preheated to the tire mounting temperature, a green tire is mounted and vulcanized; When a tire vulcanization is completed and the mold is opened to prepare for the cyclic vulcanization process of the next tire, data collection is started during mold opening and waiting; The control system in the vulcanizer compares the collected (time or temperature) data with the threshold value preset in the system and judges whether to perform compensated heating. When the system judges that compensated heating is required, the system starts the compensated heating program, and the mold is heated by controlling the electric heating device to compensate the temperature within a certain range in real time, that is, the mold is heated by increasing the first temperature compensation value C1 on the basis of the basic heating temperature C to achieve temperature compensation inside the mold. When the heating is completed and the production conditions are restored (the production conditions restored in the present invention refer to the elimination of factors causing mold opening and standby in a short time), data collection is stopped, and the mold is closed (the mold closing in the present invention refers to the upper mold and the lower mold closing to form a closed chamber), and the vulcanization of the tire continues; When the system judges that compensated heating is not required, basic heating is performed, and the control system controls the electric heating device to heat the mold at the basic heating temperature C. When the heating is completed and the production conditions are restored, data collection is stopped, and the mold is closed to continue the vulcanization of the tire. And in each mold opening and standby process, the above data collection is repeated, and a new green tire is placed in the closed mold cavity for vulcanization, and the control system continues to judge whether to perform compensated heating, so that the mold always maintains the basic heating temperature C required for tire vulcanization.

[0024] The steps of starting data collection when the mold is opened and comparing with the threshold value preset in the control system in the present invention are carried out during the uninterrupted cyclic vulcanization process of countless tires, and in the process of mold opening and standby to replace the next tire after each tire vulcanization is completed, the above data collection and comparison with the threshold value of the system to judge whether to perform compensated heating are repeated. Through the data collection during mold opening, comparison with the threshold value to judge whether to perform compensated heating, during the mold opening and standby process of the vulcanizer, the temperature inside the mold can still be maintained at the tire mounting temperature. When the mold is closed and the vulcanization of the tire continues, the vulcanization of the tire can be directly carried out without additional preheating and temperature increase of the mold, that is, adaptive temperature control is realized inside the mold, thereby effectively improving the vulcanization efficiency. Preferably, the tire mounting temperature range in the present invention is between 140 degrees Celsius and 150 degrees Celsius, and the tire vulcanization effect is better.

[0025] As shown in the appendix Figure 3The first embodiment of the adaptive heating method of the mold according to the present invention is shown. Among them, the data collection is to collect the time of mold opening and standby, that is, time collection is performed, and the threshold value is the time threshold. After the vulcanizer opens the mold, the control system compares the collected time of mold opening and standby with the time threshold preset in the system. When the time of mold opening and standby is greater than the time threshold, it is determined that compensation heating is required. The control system controls the electric heating device to increase the first temperature compensation value C1 on the basis of the basic heating temperature C to heat the mold, so as to realize the temperature compensation in the mold. After the heating is completed and the production conditions are restored, the mold is closed and the tire vulcanization continues. When the time of mold opening and standby is less than the time threshold, basic heating is performed without compensation heating, and the electric heating device heats the mold at the basic heating temperature C. After the heating is completed and the production conditions are restored, the mold is closed and the tire vulcanization continues.

[0026] Through repeated experiments, the applicant has obtained the following relationship between the time of mold opening and standby and the first temperature compensation value C1. Preferably, when the time of mold opening and standby is within 5 minutes, no temperature compensation is required, and only the mold needs to be heated by the electric heating device at the basic heating temperature. When the time of mold opening and standby is more than 5 minutes, temperature compensation is required, and production can continue without additional heating when the production conditions are restored.

[0027] Furthermore, when the time of mold opening and standby is between 5 and 10 minutes, the first temperature compensation value C1 is 2 to 3 degrees Celsius; when the time of mold opening and standby is between 10 and 15 minutes, the first temperature compensation value C1 is 3 to 5 degrees Celsius; when the time of mold opening and standby is between 15 and 20 minutes, the first temperature compensation value C1 is 5 to 8 degrees Celsius; when the time of mold opening and standby is more than 20 minutes, the first temperature compensation value C1 is 8 to 10 degrees Celsius. Through the setting of the above first temperature compensation value C1, the vulcanization effect is the best and the tire vulcanization efficiency is the best when the tire vulcanization continues after the production conditions are restored.

[0028] Taking the basic vulcanization temperature of PCR tires (passenger car radial tires) as 175 °C as an example, when the mold opening and standby time is within 5 minutes, no compensation heating is required, and the mold is only heated to 175 °C by the electric heating device; when the mold opening and standby time continues to increase to 5 to 10 minutes, the electric heating device is adjusted to heat the mold to 177 to 178 °C; when the mold opening and standby time continues to increase to 10 to 15 minutes, the electric heating device is adjusted to heat the mold to 178 to 180 °C; when the mold opening and standby time continues to increase to 15 to 20 minutes, the electric heating device is adjusted to heat the mold to 180 °C to 183 °C; when the mold opening and standby time continues to increase to more than 20 minutes, the electric heating device is adjusted to heat the mold to 183 to 185 °C. By adjusting different first temperature compensation values C1 according to different mold opening and standby times, real-time variable temperature heating of the mold is achieved, thereby improving the vulcanization efficiency.

[0029] For the acquisition of the mold opening and standby time described in the present invention, an induction element (not shown) can be set at the mold closing position of the upper mold 11 and the lower mold 12. When the mold is opened, the induction element is triggered to start timing; the timing can be stopped by triggering the induction element or program control when the production conditions are restored for mold closing or when the tire gripper transfers in. Preferably, the induction element is an induction switch.

[0030] As shown in the appendix Figure 4 The second embodiment of the mold adaptive heating method described in the present invention is shown. Among them, the data acquisition is to acquire the temperature of the mold after mold opening, that is, to acquire the temperature of the mold after mold opening in real time. The threshold is the temperature threshold. The control system compares the acquired temperature of the mold after mold opening with the temperature threshold preset in the system. When the mold temperature is lower than the temperature threshold, compensation heating is carried out. The control system controls the electric heating device to increase the first temperature compensation value C1 on the basis of the basic heating temperature C to heat the mold, so as to achieve temperature compensation in the mold. After the heating is completed and the production conditions are restored, mold closing continues for tire vulcanization; when the mold temperature is higher than the temperature threshold, the system determines that basic heating is required and no compensation heating is required. The control system controls the electric heating device to heat the mold at the basic heating temperature C. After the heating is completed and the production conditions are restored, mold closing is controlled to continue for tire vulcanization.

[0031] The applicant has learned through repeated verification that the following relationship exists between the temperature of the mold after mold opening, the temperature threshold, and the first temperature compensation value C1. When the range of the temperature reduction of the mold after mold opening compared to the temperature threshold is within 0.5 degrees Celsius, no temperature compensation is required, and the system controls the electric heating device to heat at the basic heating temperature. When the range of the temperature reduction of the mold after mold opening relative to the temperature threshold exceeds 0.5 degrees Celsius, temperature compensation is required, and the control system controls the electric heating device to increase the first temperature compensation value C1 on the basis of the basic heating temperature C to heat the mold.

[0032] Further, when the range of the temperature reduction of the mold after mold opening relative to the temperature threshold is 0.5 to 1 degree Celsius, the first temperature compensation value C1 is 1 to 2 degrees Celsius. When the range of the temperature reduction of the mold after mold opening relative to the temperature threshold is 1 to 2 degrees Celsius, the first temperature compensation value C1 is 2 to 3 degrees Celsius. By compensating and heating with the first temperature compensation value C1 set above, the vulcanization efficiency of tire vulcanization is optimal when resuming production conditions. Different first temperature compensation values C1 are adjusted according to different mold opening temperatures after mold opening to achieve variable-temperature heating of the mold, thereby improving the vulcanization efficiency.

[0033] The mold temperature described in the present invention can be obtained by collecting on the inner surface of the mold near the vulcanization bladder side by setting a second temperature measuring element (not shown). For the collection of the mold temperature, an induction switch can be set at the mold closing position of the upper mold 11 and the lower mold 12. When the mold is opened, the induction switch is triggered to measure the temperature. The temperature measurement can be stopped by triggering the induction switch or program control when resuming production conditions and closing the mold or when the tire gripping manipulator transfers in. Preferably, the second temperature measuring element is a thermocouple.

[0034] As Figure 1 shown, it is a schematic diagram of the main body of a vulcanizer with a mold opening and closing mold 10 and an electric heating device according to the present invention. The electric heating device is used to heat the mold opening and closing mold 10 of the tire vulcanizer, including a first heating unit 21 arranged at the top position of the mold 10, a second heating unit 22 arranged at the bottom of the mold 10, and a plurality of third heating units 23. The plurality of third heating units 23 are arranged around the circumference of the mold 10. The vulcanizer can separately control any one or more of the first heating unit 21, the second heating unit 22, and the third heating unit 23 for basic heating or compensation heating to achieve temperature compensation of the mold.

[0035] On the first heating unit 21 of the present invention, a number of upper heating areas are arranged in sub-regions. During actual use, one or more upper heating areas on the first heating unit 21 can be selected for basic heating or compensation heating according to needs. On the second heating unit 22 of the present invention, a number of lower heating areas are arranged in sub-regions. During actual use, the vulcanizer can control one or more lower heating areas on the second heating unit 22 for basic heating or compensation heating according to needs. As Figure 5 shown, only the schematic diagram of the first heating unit with two heating areas is taken as an example for illustration below. The first upper heating area 211 and the second upper heating area 212 are arranged in sub-regions on the first heating unit 21 from the center of the first heating unit outwards. One or more areas in the first upper heating area 211 or the second upper heating area 212 can be selected for basic heating or compensation heating according to needs, so as to more accurately meet the heating requirements of different specifications of tires or different positions of the tires.

[0036] Specifically, electric heating elements 31 are respectively arranged in a number of upper heating areas of the first heating unit 21, a number of lower heating areas of the second heating unit 22, and the third heating unit 23. The heating units and different areas on the heating units are heated through the electric heating elements 31, and then the mold is heated through heat conduction. Preferably, the electric heating element 31 can be an electric heating wire, a resistance wire or an electromagnetic wire.

[0037] When the vulcanizer preheats the cold mold during long-term shutdown and then restarting production or after changing the mold, the mold can be preheated according to the basic heating temperature (i.e., the normal vulcanization temperature). Preferably, the mold can also be preheated by high-temperature preheating, that is, a second temperature compensation value C2 is added to the basic heating temperature C to quickly preheat the mold. Preferably, the range of the second temperature compensation value C2 is 0 to 30 degrees Celsius. Taking the normal vulcanization temperature of PCR tires as 175 degrees Celsius as an example, when preheating, the mold can be preheated at a temperature of 175 to 205 degrees Celsius. Through high-temperature preheating, the mold preheating time can be effectively shortened, the mold preheating efficiency can be improved, and then the tire vulcanization efficiency can be improved.

[0038] Optionally, when the time between mold opening and standby exceeds 20 minutes, the mold can be preheated again by high temperature according to needs to better vulcanize the tire and ensure the tire vulcanization quality.

[0039] As can be seen from the above disclosed technical content, for the die self-adaptive heating method of the vulcanizer according to the present invention, the (time or temperature) data collected after mold opening is compared with the threshold value preset in the system, so as to judge whether the electric heating device performs compensatory heating or basic heating on the mold, ensuring that the temperature inside the mold always remains at the tire mounting temperature during mold opening and standby, so that direct vulcanization of the tire can be carried out after changing the tire or restoring the production conditions, without the need for additional heating. Through compensatory heating during the cyclic vulcanization process and high-temperature preheating of the cold mold, variable-temperature heating of the mold during the entire tire vulcanization production process is achieved, effectively improving the vulcanization efficiency of the tire.

[0040] The above content is only part of the implementation manners of the present application, aiming to elaborate the technical concept and characteristics of the present application. Any equivalent changes or alternative technical solutions that are easily conceivable by those skilled in the art under the inspiration of the technical content of the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An adaptive heating method for a vulcanizing machine mold, the vulcanizing machine comprising a mold and an electric heating device for heating the mold, the adaptive heating method comprising the following steps: S1: Preheat the mold that has been shut down for a long time or the newly replaced mold through the electric heating device to raise the temperature of the mold to the basic heating temperature C; S2: placing the green tire in a closed mold cavity for vulcanization; S3: After the green tire is vulcanized and the mold is opened to unload the tire, the control system collects data; S4: The control system compares the collected data with a preset threshold value and determines whether to perform compensatory heating; when it is determined that compensatory heating is required, the control system controls the electric heating device to increase the first temperature compensation value C1 on the basic heating temperature C to heat the mold; when it is determined that compensatory heating is not required, the control system controls the electric heating device to maintain the basic heating temperature C to heat the mold; S5: Stop data collection and place a new green tire in a closed mold cavity for vulcanization, and repeat steps S3 and S4 to keep the mold at the basic heating temperature C required for vulcanization.

2. The adaptive heating method according to claim 1, characterized in that: The data collection in S3 is time collection, and the threshold in S4 is a time threshold. The control system starts timing when the mold is opened after the curing of the current raw tire is completed, and compares the time used to place the next raw tire in the closed mold cavity with the time threshold preset by the control system. When the collected time is greater than the time threshold, compensatory heating is performed, and the control system controls the electric heating device to increase the first temperature compensation value C1 on the basic heating temperature C to heat the mold; when the collected time is less than the time threshold, basic heating is performed, and the control system controls the electric heating device to heat the mold at the basic heating temperature C.

3. The adaptive heating method according to claim 1, characterized in that: The data collected in S3 is mold temperature collection, and the threshold in S4 is a temperature threshold. The control system compares the mold temperature after the mold is opened after the vulcanization of the current raw tire is completed with the temperature threshold preset by the control system. When the mold temperature is lower than the temperature threshold, compensatory heating is performed, and the control system controls the electric heating device to increase the first temperature compensation value C1 on the basic heating temperature C to heat the mold according to the mold temperature; when the mold temperature is higher than the temperature threshold, basic heating is performed, and the control system controls the electric heating device to heat the mold at the basic heating temperature C.

4. The adaptive heating method according to claim 2 or 3, characterized in that: The electric heating device includes a first heating unit arranged at the top position of the mold, a second heating unit arranged at the bottom of the mold, and a plurality of third heating units, wherein the plurality of third heating units are arranged circumferentially on the peripheral side of the mold, and the control system of the vulcanizer controls any one or more of the first heating unit, the second heating unit and the third heating unit to perform basic heating or compensatory heating.

5. The adaptive heating method according to claim 4, characterized in that: The first heating unit is provided with a plurality of upper heating areas, and the control system controls any plurality of upper heating areas to perform basic heating or compensatory heating.

6. The adaptive heating method according to claim 5, characterized in that: The second heating unit is provided with a plurality of lower heating areas, and the control system controls any plurality of lower heating areas to perform basic heating or compensatory heating.

7. The adaptive heating method according to claim 2, characterized in that: When the collection time is 0 to 5 minutes, the first temperature compensation value C1 is 0; when the collection time is 5 to 10 minutes, the first temperature compensation value C1 is 2 to 3 degrees Celsius; when the collection time is 10 to 15 minutes, the first temperature compensation value C1 is 3 to 5 degrees Celsius; when the collection time is 15 to 20 minutes, the first temperature compensation value C1 is 5 to 8 degrees Celsius; when the collection time is greater than 20 minutes, the first temperature compensation value C2 is 8 to 10 degrees Celsius.

8. The adaptive heating method according to claim 3, characterized in that: When the mold temperature is less than the temperature threshold in the range of 0 to 0.5 degrees Celsius, the first temperature compensation value C1 is 0; when the mold temperature is less than the temperature threshold in the range of 0.5 to 1 degree Celsius, the first temperature compensation value C1 is 1 to 2 degrees Celsius; When the mold temperature is less than the temperature threshold in the range of 1 to 2 degrees Celsius, the first temperature compensation value C1 is 2 to 3 degrees Celsius.

9. The adaptive heating method according to claim 2 or 3, characterized in that: The preheating of the mold in S1 is high-temperature preheating, wherein the high-temperature preheating is that the control system controls the electric heating device to increase the second temperature compensation value C2 on the basic heating temperature C to heat the mold.

10. The adaptive heating method according to claim 9, characterized in that: The second temperature compensation value C2 ranges from 0 to 30 degrees Celsius.

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