Intelligent temperature control system and method for hot-pressing compound equipment

Abstract

The invention discloses an intelligent temperature control system and method for hot-pressing compounding equipment, and belongs to the technical field of hot-pressing compounding, and the system establishes a functional relationship between the temperature of an internal adhesive layer of a part and the temperatures of the upper and lower surfaces of the part, the temperature of a mold, the environment temperature and the heating time. According to the takt time needed by production, the temperature and heating time needed by the upper mold and the lower mold are automatically calculated, the temperature of the upper surface and the lower surface of a part is monitored in real time, and when the heating time is up, the temperature of an adhesive layer just reaches a set value, so that product quality defects caused by insufficient heating are avoided, and energy loss caused by excessive heating is avoided. Therefore, on-demand heat supply is achieved, energy waste is reduced, the production period is shortened, and the production efficiency and the quality stability of the hot-pressing composite technology are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of hot pressing and compounding, and in particular relates to an intelligent temperature control system and method for hot pressing and compounding equipment. Background Art

[0002] During the hot pressing and laminating process, the temperature control system plays a vital role in production efficiency and product quality. Existing temperature control systems usually rely only on personal experience and experiments under specific conditions to set fixed upper and lower mold temperatures, but cannot accurately reflect the actual temperature of the glue layer inside the part. This method ignores changes in product batches and ambient temperature, resulting in insufficient or excessive heating of the glue layer, which affects the bonding strength and appearance quality of the product. In addition, excessive heating time increases energy consumption and prolongs the production cycle. Therefore, there is an urgent need for an intelligent temperature control system that can dynamically adjust the mold temperature and heating time according to the temperature changes of the part glue layer to achieve "heating on demand" and meet the increasingly complex composite material processing needs. Summary of the invention

[0003] The object of the present invention is to provide an intelligent temperature control system, which can dynamically adjust the upper and lower mold temperatures of a hot pressing device by calculating the functional relationship between the upper and lower surface temperatures of a part, mold temperature, ambient temperature, time and glue layer temperature, and accurately control the glue layer temperature to ensure that the best bonding effect is achieved within the set heating time, reduce the risk of overheating or insufficient heating, and reduce energy consumption.

[0004] The technical solution of the present invention is as follows: an intelligent temperature control system for hot pressing composite equipment, comprising: an upper mold and a lower mold, multiple temperature control zones are arranged on the upper mold and the lower mold, mold temperature sensors and part temperature sensors are arranged on the upper mold and the lower mold in each temperature control zone, and an ambient temperature sensor is also provided on the upper mold, and each temperature control zone has an independent temperature control device.

[0005] An intelligent temperature control method for hot pressing composite equipment comprises the following steps:

[0006] S1 builds glue layer temperature model: through experiments, collects the corresponding relationship between glue layer temperature and ambient temperature, upper and lower surface temperature of parts, upper and lower mold temperature, heating time, and establishes a functional relationship;

[0007] S2 specifies the production cycle: given the expected hot pressing and laminating production cycle, calculate the expected part heating time; and measure the real-time ambient temperature at the same time;

[0008] S3 automatically sets mold temperature: calculates the optimal upper and lower mold temperatures for each temperature control zone based on the glue layer temperature model;

[0009] S4 closed-loop control: Place the parts into the hot pressing composite equipment for heating, and all the temperature sensors of the parts start measuring in real time. When the temperature sensors of all the parts reach the theoretical value of the glue layer temperature model, the mold is opened and heating is stopped.

[0010] S5 periodic calibration: Regularly measure the actual temperature of the glue layer, and then feed it back to the temperature control system to correct the current temperature model.

[0011] Furthermore, the functional relationship is as follows:

[0012] y=-0.690566x 1 +1.150282x 2 +0.453438x 3 +0.032417x 4 +0.034276x 5 -1.293270

[0013] Among them, y is the temperature of the glue layer, x 1 is the lower surface temperature of the part, x 2 is the surface temperature of the part, x 3 is the mold temperature, x 4 is the ambient temperature, x 5 For time.

[0014] Furthermore, each temperature control zone has a glue layer temperature model.

[0015] Furthermore, after each production is completed, the corresponding relationship between the upper and lower surface temperatures of the parts, the mold temperature, the ambient temperature, and time is stored and displayed in the form of a curve graph.

[0016] Furthermore, a thermocouple thermometer is used to regularly detect the actual temperature of the glue layer, and the value is input into the device in the form of a table. The controller of the temperature control system will automatically correct the temperature model (function) according to the actual temperature of the glue layer to realize the autonomous learning function.

[0017] The beneficial effects of the present invention are:

[0018] Efficient production: The system adjusts the mold temperature and heating time in real time according to the production rhythm, shortens the production cycle and improves production efficiency;

[0019] Precise temperature control: By real-time monitoring of the part surface and mold temperature, the temperature of the adhesive layer can be precisely controlled to avoid overheating or underheating and ensure bonding quality;

[0020] Energy saving and emission reduction: reduce unnecessary heating processes, reduce energy consumption, and reduce material waste caused by inaccurate temperature control in production;

[0021] Strong adaptability: Through the temperature control zoning design, the system can adapt to the complex structure and material properties of different parts and achieve flexible temperature control. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the mold and parts structure diagram.

[0023] Figure 2 This is the temperature change diagram of the glue layer.

[0024] Figure 3 Schematic diagram of the working principle of the temperature control system.

[0025] In the figure:

[0026] 1 upper mold, 2 lower mold, 3 temperature control zone, 4 mold temperature sensor, 5 part temperature sensor, 6 ambient temperature sensor, 7 parts, 8 glue layer. DETAILED DESCRIPTION

[0027] It should be noted that in the description of the present invention, the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "clockwise", "counterclockwise", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect" and the like should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral connection; the connection can be a mechanical connection or an electrical connection; the connection can be a direct connection or an indirect connection through an intermediate medium, and can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] An intelligent temperature control system for hot pressing composite equipment comprises: an upper die 1 and a lower die 2. A plurality of temperature control zones 3 are arranged on the upper die 1 and the lower die 2. A mold temperature sensor 4 and a part temperature sensor 5 are arranged on the upper die 1 and the lower die 2 in each temperature control zone 3. An ambient temperature sensor 6 is also arranged on the upper die 1. Each temperature control zone 3 has an independent control device.

[0030] The mold temperature sensor is used to monitor the mold temperature in real time, the part temperature sensor is used to collect part surface temperature data, and the ambient temperature sensor is used to monitor the ambient temperature.

[0031] An intelligent temperature control method for hot pressing composite equipment comprises the following steps:

[0032] S1 builds glue layer temperature model: through experiments, collects the corresponding relationship between glue layer temperature and ambient temperature, upper and lower surface temperature of parts, upper and lower mold temperature, heating time, and establishes a functional relationship;

[0033] S2 specifies the production cycle: given the expected hot pressing and laminating production cycle, calculate the expected part heating time; and measure the real-time ambient temperature at the same time;

[0034] S3 automatically sets mold temperature: calculates the optimal upper and lower mold temperatures for each temperature control zone based on the glue layer temperature model;

[0035] S4 closed-loop control: Place the parts into the hot pressing composite equipment for heating, and all the temperature sensors of the parts start measuring in real time. When the temperature sensors of all the parts reach the theoretical value of the glue layer temperature model, the mold is opened and heating is stopped.

[0036] S5 periodic calibration: Regularly measure the actual temperature of the glue layer, and then feed it back to the temperature control system to correct the current temperature model.

[0037] The functional relationship is as follows:

[0038] y=-0.690566x 1 +1.150282x 2 +0.453438x 3 +0.032417x 4 +0.034276x 5 -1.293270

[0039] Among them, y is the temperature of the glue layer, x 1 is the lower surface temperature of the part, x 2 is the surface temperature of the part, x 3 is the mold temperature, x 4 is the ambient temperature, x 5 For time.

[0040] Each temperature control zone has a glue layer temperature model.

[0041] Temperature control partition: The upper and lower molds are divided into multiple independent temperature control partitions. The material, thickness, and surface curvature of the parts corresponding to each partition are basically the same, so the temperature of a single point on the surface of the part can replace the temperature of the entire part partition. Each temperature control partition of the mold has an independent temperature measurement and control device.

[0042] Temperature sensor arrangement: A mold temperature sensor is set inside each temperature control zone of the upper and lower molds to monitor the mold temperature in real time. A part temperature sensor is set on the surface of each temperature control zone of the upper and lower molds to collect part surface temperature data; an ambient temperature sensor is also set to monitor the ambient temperature.

[0043] Glue layer temperature model construction: Through repeated experiments, the corresponding relationship between glue layer temperature and ambient temperature, upper and lower surface temperature of parts, upper and lower mold temperature, heating time, and an approximate functional relationship is established. Each temperature control zone has its own glue layer temperature model.

[0044] Specify production rhythm: According to external customer needs and internal material management needs, the expected hot pressing and laminating production rhythm is given, and then the expected part heating time is calculated; at the same time, the real-time ambient temperature is measured.

[0045] Automatically set mold temperature: Since the heating time and ambient temperature are known, the optimal upper and lower mold temperatures for each temperature control zone can be calculated based on the function.

[0046] Closed-loop control: Place the parts into the hot pressing composite equipment for heating, and all the temperature sensors of the parts start measuring in real time. When the temperature sensors of all the parts reach the theoretical value calculated by the function, it means that the glue layer of the parts has reached the set temperature, and the mold is opened immediately and the heating is stopped.

[0047] Energy saving optimization: By reducing unnecessary heating time and accurately controlling the mold temperature, the system achieves maximum energy saving and shortens the production cycle

[0048] According to the product structure, the upper and lower molds are divided into zones ( Figure 1 ).

[0049] Under different ambient temperatures, set different mold temperatures, and then record the relationship between the upper surface, lower surface, and glue layer temperatures of the parts and the heating time (the glue layer temperature is measured using a thermocouple thermometer) ( Figure 2 ).

[0050] Set the required production rhythm, the system automatically deducts the time for picking up and placing parts, and the time for opening and closing the equipment, and calculates the theoretical heating time; measures the ambient temperature, and then Figure 2 In the curve shown, the upper and lower mold temperatures are automatically searched to make the glue layer temperature reach the set value (such as 50°C) within the theoretical heating time, and then the value is automatically set; during the hot pressing process, the part temperature sensor feeds back the temperature change of the part surface in real time. When the temperature reaches the preset target (when the corresponding glue layer temperature reaches the set value in the curve), the mold is opened to complete the hot pressing process.

[0051] The above process should ensure that all temperature control zones can reach the theoretical temperature of the glue layer.

[0052] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any modification, equivalent replacement and improvement made by any person skilled in the art within the technical scope disclosed by the present invention and within the spirit and principle of the present invention shall be covered within the protection scope of the present invention. At the same time, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0053] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

Claims

1. An intelligent temperature control system for hot pressing composite equipment, characterized in that: include: The upper mold and the lower mold have multiple temperature control zones. Mold temperature sensors and part temperature sensors are arranged on the upper mold and the lower mold in each temperature control zone. An ambient temperature sensor is also provided on the upper mold. Each temperature control zone has an independent temperature control device.

2. An intelligent temperature control method for hot pressing composite equipment, characterized in that: The following steps are involved: S1 builds glue layer temperature model: through experiments, collects the corresponding relationship between glue layer temperature and ambient temperature, upper and lower surface temperature of parts, mold temperature, heating time, and establishes a functional relationship; S2 specifies the production cycle: given the expected hot pressing and laminating production cycle, calculate the expected part heating time; and measure the real-time ambient temperature at the same time; S3 automatically sets the mold temperature: calculates the optimal mold temperature for each temperature control zone based on the glue layer temperature model; S4 closed-loop control: Place the parts into the hot pressing composite equipment for heating, and all the temperature sensors of the parts start measuring in real time. When the temperature sensors of all the parts reach the theoretical value of the glue layer temperature model, the mold is opened and heating is stopped. S5 periodic calibration: Regularly measure the actual temperature of the glue layer, and then feed it back to the temperature control system to correct the current temperature model.

3. The intelligent temperature control method for hot pressing composite equipment according to claim 2, characterized in that: In step S1, the functional relationship is as follows: y=-0.690566x1+1.150282x2+0.453438x3+0.032417x4+0.034276x5-1.293270 Among them, y is the glue layer temperature, x1 is the lower surface temperature of the part, x2 is the upper surface temperature of the part, x3 is the mold temperature, x4 is the ambient temperature, and x5 is time.

4. The intelligent temperature control method for hot pressing composite equipment according to claim 2, characterized in that: Each temperature control zone has a glue layer temperature model.

5. The intelligent temperature control method for hot pressing composite equipment according to claim 2, characterized in that: After each production is completed, the corresponding relationship between the upper and lower surface temperature of the part, the mold temperature, the ambient temperature, and the heating time is stored and displayed in the form of a curve graph.

6. The intelligent temperature control method for hot pressing composite equipment according to claim 2, characterized in that: Step S5 specifically uses a thermocouple thermometer to regularly detect the actual temperature of the glue layer, and then inputs the value into the device in the form of a table. The controller of the temperature control system will automatically correct the temperature model according to the actual temperature of the glue layer to realize the autonomous learning function.

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