An automatic pressure control mechanism and control method during the lamination process

Abstract

The present invention discloses an automatic pressure control mechanism and control method in a lamination process, which controls an upper pressure plate to descend to the surface of a pressure area detection component, contacts the pressure-bearing surface of a workpiece, and detects the real-time pressure-bearing area S1 of the workpiece. When the feedback value of the pressure sensor is N1, the surface pressure P1 of the workpiece at this time is calculated. When the value of the detected pressure P1 reaches the warning value P, the pressure is stopped. After the pressure is stopped, a heating or cooling program is started, and the volume of the material in the heating chamber expands or decreases with the change in temperature, causing a change in the pressure value. The pressure control system controls the output of the regulating force of the pressure actuator to automatically reduce or increase the pressure to ensure that the pressure borne by the workpiece remains stable during the lamination process. The process method can automatically detect the pressure-bearing area during the heating and / or cooling process, and monitor and accurately adjust the pressure and pressure in real time.

Description

Technical Field

[0001] The present invention belongs to the field of lamination technology, and specifically relates to a process method that uses a mechanical sensor component, a servo motor and a pressure feedback system to automatically detect the pressurized area during heating and / or cooling, and to monitor and accurately adjust the pressure and pressure in real time. Background Art

[0002] In the field of lamination, two or more layers of the same or different components are typically combined into a multi-layered structure through heat and pressure, with or without the use of adhesives. During the heating process, sometimes before and / or after the temperature is lowered, constant pressure must be applied to the components being laminated. Most commonly, laminated products include plastics and rubber, which are not particularly sensitive to pressure, such as artificial leather or composite films, such as printed circuit boards. However, technological advancements are also enabling the fabrication of more complex and sophisticated products, such as three-dimensional stacked plastic-encapsulated memory chips or parallel solder-sealed circuits with cavities. The need for multi-layer stacking has led to the need for lamination. For these products containing pressure-sensitive, fragile components, if the pressure per unit area, not just the total pressure, exceeds the mechanical or structural strength limit of the material, the product will be damaged. For example, the pressure-bearing area of the top layer of some special structural products is not as easy to measure as the plate parts processed by traditional lamination process. Instead, the pressure-bearing area is closely related to its design. The surface of the product is not a regular plane, and there are even pits on the surface. When such products are laminated, the surface area that bears pressure is not the entire top surface area. The area may even change during the pressurization process due to the structure or material. Therefore, it is necessary to detect the pressure-bearing area and pressure in real time. Otherwise, the local pressure applied that exceeds the upper limit of tolerance will lead to destructive effects such as deformation of the space in the product cavity, cracking of the silicon wafer, and peeling of the bonding point, which may cause the product to be scrapped and fail.

[0003] Currently, mainstream laminating machines generally do not have the function of real-time pressure monitoring.

[0004] On the other hand, because the lamination process requires heating and pressurizing the workpiece, the pressure plate is in close contact with the workpiece under pressure during this process. During the temperature increase and decrease in the internal chamber, the pressure plate, pressure push rod, and components within the heating chamber will experience changes in volume due to thermal expansion and contraction. When the pressure plate and workpiece are in close contact and their positions remain unchanged, the pressure between them will continue to rise as the volume expands due to heating, which may cause serious damage to pressure-sensitive components. As the temperature drops, the pressure between these parts will decrease due to the decrease in volume when they are already in close contact and their positions remain unchanged. In general, conventional lamination methods without real-time pressure monitoring and regulation systems will not be able to maintain a stable pressure output for pressure-sensitive products during thermal processes with significant temperature changes. Conventional lamination equipment is suitable for processing materials that are not sensitive to pressure, and cannot effectively and real-timely control pressure changes with high precision to effectively protect relatively pressure-sensitive workpieces. Summary of the Invention

[0005] In response to the problems existing in the prior art, the present invention proposes an automatic pressure control mechanism and control method during the lamination process. The method integrates a mechanical sensor component, a servo motor and a pressure feedback system, and can automatically detect the pressurized area during the heating and / or cooling process, and monitor and accurately adjust the pressure and pressure in real time; it can effectively and real-timely control pressure changes with high precision, thereby effectively protecting pressure-sensitive workpieces.

[0006] The present invention is achieved through the following technical solutions:

[0007] A method for automatically controlling pressure during a lamination process, comprising:

[0008] S1, after starting the lamination process, the upper pressure plate is controlled to descend until the surface of the pressure area detection component contacts the pressure-bearing surface of the workpiece and measures the real-time pressure-bearing area S1 of the workpiece. When the feedback value of the pressure sensor is N1, the surface pressure P1 of the workpiece at this time is calculated. When the value of the detected pressure P1 reaches the set warning value P, the pressure is stopped;

[0009] S2, after the pressure is stopped, the heating chamber is heated. As the temperature rises, the volume of the material in the heating chamber expands, causing the pressure value to increase. The pressure control system controls the pressure actuator to slowly move the pressure push rod in the opposite direction of the original pressure, causing the pressure value to decrease until the pressure applied to the workpiece returns to within the set warning value P range, and the pressure actuator stops moving;

[0010] S3, the heating chamber is cooled. As the temperature drops, the volume of the material in the heating chamber shrinks, causing the pressure value to drop. The pressure control system controls the pressure actuator to slowly move the pressure push rod in the positive direction of the original pressure, so that the pressure value is increased until the pressure applied to the workpiece is restored to within the set warning value P. The process is repeated until the lamination action needs to be terminated.

[0011] Preferably, the warning value P is 70% to 80% of the upper limit of the pressure that the workpiece can withstand based on the design characteristics or material characteristics of the workpiece itself. The calculated pressure value P that the workpiece is suitable to withstand is the warning value P.

[0012] Preferably, S2 is specifically as follows: after the lamination workflow is started, the upper pressure plate is controlled by the computer to first descend at a uniform speed to a position close to the surface of the workpiece, and then descends at a slow speed until the surface of the pressure area detection component 6 contacts the pressure-bearing surface of the workpiece, and the real-time pressurized area S1 of the workpiece is detected. When the pressure sensor feedback value is N1, the computer automatically divides it by the pressurized area S1 of the workpiece detected by the pressure area detection component at this time to obtain the surface pressure value P1 of the workpiece at this time. When the value of P1 detected reaches the warning value P, the computer controls the pressure rod to stop continuing to pressurize, so that the pressure plate remains in this position.

[0013] Preferably, when the upper pressure plate first descends at a uniform speed to a position close to the surface of the workpiece, the pressure push rod moves at a speed of 0.5 mm / s to 2 mm / s.

[0014] Preferably, when the pressure push rod contacts the pressure-bearing surface of the workpiece, the moving speed of the pressure push rod is 0.05 mm / s to 0.1 mm / s.

[0015] Preferably, the heating chamber is heated up, and the volume expansion of the material in the heating chamber causes the pressure to increase, and the pressure sensor feeds back the pressure value at this time to the pressure control system; the pressure control system automatically calculates the pressure value and action direction that should be reduced based on the pressure parameter value set in advance and the pressure exceeding the set warning value upper limit, and transmits the parameter signal to the pressure actuator; the pressure actuator slowly moves the pressure push rod in the opposite direction of the original pressure to reduce the pressure value until the pressure applied to the workpiece returns to within the set warning value P range.

[0016] Preferably, in S3, the heating chamber is subjected to a cooling process. As the temperature drops, the volume of the material in the heating chamber shrinks, causing the pressure to drop. The pressure sensor feeds back the pressure value to the pressure control system. If the pressure value is lower than the lower limit of the set warning value P pressure range, the pressure control system automatically calculates the pressure value and action direction that should be increased based on the pressure parameter value set in advance, and immediately transmits the parameter signal to the pressure actuator. The pressure actuator slowly moves the pressure push rod in the original positive direction of pressure to increase the pressure value until the pressure applied to the workpiece returns to within the set warning value P range and is maintained until the lamination work needs to be completed.

[0017] A pressure automatic control mechanism in a laminating process comprises an upper pressure plate, a lower pressure plate, a pressure area detection assembly, a computer, a pressure control system and a pressure actuator, wherein the pressure area detection assembly is mounted on the surface of the upper pressure plate, and the pressure actuator is provided with a pressure sensor; the pressure actuator is connected to the upper pressure plate and the lower pressure plate respectively through a pressure push rod; when laminating is in operation, a workpiece is placed on the surface of the lower pressure plate, and the pressure control system is communicated with the pressure area detection assembly and the pressure sensor respectively; and the computer is communicated with the pressure control system.

[0018] Preferably, the pressure area detection assembly includes a base plate and mechanical sensors, and the mechanical sensors are installed on the base plate in an array arrangement.

[0019] Preferably, the upper pressure plate and the lower pressure plate are arranged in parallel.

[0020] Compared with the prior art, the present invention has the following beneficial technical effects:

[0021] The present invention provides a method for automatically controlling pressure during a lamination process. The method can automatically detect the pressure-bearing area according to the lamination process requirements and the external characteristics of the workpiece, and after inputting the pressure setting data, can automatically control and adjust the pressure generated on the workpiece surface in real time during the entire heating and pressurizing process, thereby controlling the pressure to prevent the local pressure of the product from exceeding the upper limit that the workpiece material or structure can withstand, thereby achieving the lamination effect as much as possible, while preventing the workpiece structure, especially certain relatively fragile structures or materials, from being damaged due to excessive pressure. For example, if the lamination includes a plastic-encapsulated device containing an internal silicon chip, or if there is a cavity structure in the component to be laminated, the pressure tolerance limit of these materials or structures is relatively low. If the pressure limit is exceeded, the workpiece will be damaged or deformed. Therefore, it is necessary to adjust and control the pressure throughout the lamination process to ensure that the pressure remains below the upper limit. The present invention utilizes an automatic pressure control method during the lamination process to protect precision components that are sensitive to pressure. This method allows for the completion of the heating and pressurizing process without causing damage to pressure-sensitive components that exceeds their tolerance limits. A stable pressure within the control system's output precision can be applied throughout the pressurization process, ensuring that local pressure does not exceed the workpiece's tolerance. This method ensures product quality stability when laminating components with delicate or fragile structures that require interlayer bonding. It has high application value and promising prospects for the lamination and assembly of high-tech and precision laminated components.

[0022] Furthermore, this method can enable the lamination process to be used not only for the stacking processing of homogeneous materials such as printed circuit boards, but also for the stacking assembly of more complex special structural parts to achieve its specific process goals.

[0023] Furthermore, the method uses a pressure actuator to slowly execute a pushing action, automatically reducing or increasing the pressure according to the force output that should be adjusted, ensuring that the pressure on the product is always stable within an appropriate range during the required temperature increase and decrease processing, thereby offsetting the stress changes caused by thermal expansion and contraction of components and pressure-applying equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the automatic pressure control structure and connection during the lamination process;

[0025] Figure 2 A planar sensor array diagram is formed for heat-resistant mechanical sensors mounted on a pressure plate;

[0026] Figure 3 This is a schematic diagram of the use of a planar sensor array;

[0027] Figure 4 This is a schematic diagram of the thrust device moving in the opposite direction when the pressure is too large;

[0028] Figure 5 This is a schematic diagram of the forward movement of the thrust device when the pressure is too low;

[0029] Figure 6 Schematic diagram of special workpiece;

[0030] In the figure: pressure actuator 1, pressure push rod 2, upper pressure plate 3, lower pressure plate 4, pressure sensor 5, pressure area detection component 6, base plate 61, mechanical sensor 62, pressure control system 7, computer 8, workpiece 9. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below with reference to specific embodiments, which are intended to explain the present invention rather than to limit it.

[0032] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0033] The present invention adopts the following method to adjust the pressure and pressure during the lamination process:

[0034] A method for automatically controlling pressure during a lamination process, comprising:

[0035] S1, after starting the lamination workflow, control the upper pressure plate to descend until the surface of the pressure area detection component contacts the pressure-bearing surface of the workpiece and measures the real-time pressure-bearing area S1 of the workpiece. When the feedback value of the pressure sensor is N1, the surface pressure P1 of the workpiece at this time is calculated. When the value of the detected pressure P1 reaches the set warning value P, stop applying pressure; the warning value P is 70% to 80% of the upper limit of the pressure that the workpiece can withstand through analysis of its own design characteristics or material characteristics. The calculated pressure value P that the workpiece is suitable to withstand is the warning value P.

[0036] S2, after the pressure is stopped, the heating chamber is heated up. As the temperature rises, the volume of the material in the heating chamber expands, causing the pressure value to increase. The pressure control system controls the pressure actuator to slowly move the pressure push rod in the opposite direction of the original pressure, so that the pressure value decreases until the pressure applied to the workpiece recovers to within the set warning value P range, and the pressure actuator stops moving; S2 is specifically: after starting the lamination workflow, the computer controls the upper pressure plate to first descend at a uniform speed to a position close to the surface of the workpiece, and then descends at a slow speed until the surface of the pressure area detection component 6 contacts the pressure-bearing surface of the workpiece, and detects the area S1 of the workpiece that is subjected to pressure in real time. When the pressure sensor feedback value is N1, the computer automatically divides it by the pressure area S1 of the workpiece detected by the pressure area detection component at this time to obtain the surface pressure value P1 of the workpiece at this time. When the value of P1 detected reaches the warning value P, the computer controls the pressure rod to stop continuing to pressurize, so that the pressure plate remains in this position.

[0037] S3, the heating chamber is cooled. As the temperature drops, the volume of the material in the heating chamber shrinks, causing the pressure value to drop. The pressure control system controls the pressure actuator to slowly move the pressure push rod in the positive direction of the original pressure, so that the pressure value is increased until the pressure applied to the workpiece is restored to within the set warning value P. The process is repeated until the lamination action needs to be terminated.

[0038] Preferably, Figure 4 As shown, the heating chamber is heated up, and the volume expansion of the material in the heating chamber causes the pressure to increase. The pressure sensor feeds back the pressure value at this time to the pressure control system; the pressure control system automatically calculates the pressure value and action direction that should be reduced based on the pre-set pressure parameter value and the pressure exceeding the set warning value upper limit, and transmits the parameter signal to the pressure actuator; the pressure actuator slowly moves the pressure push rod in the opposite direction of the original pressure to reduce the pressure value until the pressure applied to the workpiece returns to within the set warning value P range.

[0039] In S3, the heating chamber is cooled down. As the temperature drops, Figure 5 As shown, the volume of the material in the heating chamber shrinks, causing the pressure to drop. The pressure sensor feeds back the pressure value to the pressure control system. If the pressure value is lower than the lower limit of the set warning value P pressure range, the pressure control system automatically calculates the pressure value and action direction that should be increased based on the pressure parameter value set in advance, and immediately transmits the parameter signal to the pressure actuator. The pressure actuator slowly moves the pressure push rod in the original positive direction of pressure to increase the pressure value until the pressure applied to the workpiece returns to within the set warning value P range and is maintained until the lamination work needs to be completed.

[0040] It can automatically detect the pressure-bearing area according to the lamination process requirements and external characteristics of the workpiece, and after inputting the pressure setting data, it can automatically control and adjust the pressure generated on the workpiece surface in real time during the entire heating and pressurization process, thereby controlling the pressure to prevent the local pressure of the product from exceeding the upper limit that the workpiece material or structure can withstand, thereby achieving the lamination effect as much as possible, while preventing the workpiece structure, especially certain relatively fragile structures or materials, from being damaged due to excessive pressure. For example, if the lamination includes a plastic-encapsulated device containing an internal silicon wafer, or there is a cavity structure in the component to be laminated, the pressure tolerance limit of these materials or structures is relatively low. If the pressure limit is exceeded, the workpiece will be damaged or deformed. Therefore, it is necessary to adjust and control the pressure throughout the lamination process to ensure that the pressure remains below this upper limit.

[0041] Preferably, when the upper pressure plate first descends at a uniform speed to a position close to the surface of the workpiece, the pressure push rod moves at a speed of 0.5 mm / s to 2 mm / s.

[0042] Preferably, when the pressure push rod contacts the pressure-bearing surface of the workpiece, the moving speed of the pressure push rod is 0.05 mm / s to 0.1 mm / s.

[0043] An automatic pressure control mechanism during lamination, such as Figure 1 As shown, it includes an upper pressure plate, a lower pressure plate, a pressure area detection component, a computer, a pressure control system and a pressure actuator, the pressure area detection component is installed on the plate surface of the upper pressure plate, and the pressure actuator is provided with a pressure sensor; the pressure actuator is connected to the upper pressure plate and the lower pressure plate respectively through a pressure push rod; when lamination is working, the workpiece is placed on the plate surface of the lower pressure plate, and the pressure control system is communicated with the pressure area detection component and the pressure sensor respectively; the computer is communicated with the pressure control system.

[0044] Preferably, the pressure area detection assembly comprises a base plate and mechanical sensors, and the mechanical sensors are mounted on the base plate in an array arrangement. The upper pressure plate and the lower pressure plate are arranged in parallel.

[0045] This method installs a high-precision pressure sensor 5 on the pressurizing actuator to monitor and receive pressure feedback data in real time.

[0046] This method uses planar sensors made of heat-resistant materials that can measure contact pressure area, and these sensors are closely arranged into an array and then mounted on the upper pressure plate, such as Figure 2 As shown, as the pressurized surface that directly contacts the workpiece, real-time pressure-bearing area information is generated by detecting signals during pressurization and automatically input into the computer 8.

[0047] This method automatically generates the pressure control information to be achieved by inputting a specified pressure value and controlling it through the computer 8 , combining the generated pressure-bearing area information and the pressure data information.

[0048] In this method, the pressure control system 7 receives and processes the force feedback data signal received by the pressure sensor 5 .

[0049] During the implementation of this method, the corresponding pressure warning value needs to be set in advance according to the pressure value range required to be maintained according to the specific product technical characteristics. The pressure control system 7 automatically calculates the pressure value that should be adjusted according to this value and immediately transmits the parameter signal to the pressure actuator 1.

[0050] The present invention utilizes an automatic pressure control method during the lamination process to protect precision components that are sensitive to pressure. This method allows for the completion of the heating and pressurizing process without causing damage to pressure-sensitive components that exceeds their tolerance limits. A stable pressure within the control system's output precision can be applied throughout the pressurization process, ensuring that local pressure does not exceed the workpiece's tolerance. This method ensures product quality stability when laminating components with delicate or fragile structures that require interlayer bonding. It has high application value and promising prospects for the lamination and assembly of high-tech and precision laminated components.

[0051] Specific implementation methods include the following:

[0052] 1. A planar sensor array is formed by heat-resistant mechanical sensors 62 and mounted on a base plate 61 as a pressure area detection component 6;

[0053] 2. Install the pressure area detection assembly 6 on the upper pressure plate;

[0054] 3. Pressurize the surface of the workpiece with a certain force, such as 70% to 80% of the upper limit of the pressure that the workpiece to be laminated can withstand based on its design characteristics or material characteristics, such as Figure 6 As shown, the workpiece is a special workpiece; Figure 3 As shown, the mechanical sensor 62 array is sensed to obtain surface pressure area data S;

[0055] 4. Input the pressure value P that the workpiece to be laminated is suitable for as a warning value on the control computer 8. If necessary, the time for maintaining the pressure can also be set;

[0056] 5. After the lamination process is started, the computer 8 controls the pressure plate to first descend at a uniform speed to a position close to the surface of the pressure-bearing component. For example, if the height between the top surface of the pressure-bearing component and the lower pressure plate is 10 mm, the upper pressure plate 3 will first descend to a position of 12 mm, and then descend at a slower speed, such as 0.1 mm / s, to prevent rapid changes in stress.

[0057] 6. Until the surface of the pressure area detection component 6 contacts the pressure-bearing surface of the workpiece, when the pressure sensor 5 feedback value N1, the computer 8 automatically divides it by the pressurized area S1 detected by the pressure area detection component 6 at this time to obtain the workpiece surface pressure value P1 at this time. When the detected value P1 reaches the warning value P, the computer 8 controls the pressure rod to stop further pressurization, so that the pressure plate remains in this position to prevent the pressure exceeding the component's tolerance;

[0058] 7. After stopping the pressure, the computer 8 automatically starts the heating program; Figure 4 As shown, during the heating process, especially when the pressure plate is in close contact with the laminated components, the temperature rise causes the volume expansion of all materials in the heating chamber and causes the pressure to rise. The high-precision pressure sensor 5 feeds back the pressure value to the control system. The pressure exceeding the upper limit of the set warning value will cause the pressure control system 7 to react; the pressure control system 7 automatically calculates the pressure value and action direction that should be reduced based on the pre-set pressure parameter value, and immediately transmits the parameter signal to the pressure actuator 1; the pre-set pressure parameter refers to the pressure determined according to the product characteristics and processing requirements for a specific product. For example, if a certain material or a certain workpiece is under pressure, the designer confirms that the upper limit of the pressure it can withstand is 1kg / cm based on the characteristics of the workpiece. 2 The contact area between the workpiece and the upper pressure plate is 10 cm 2 , the pressurized pressure output should not exceed 10kg. It can be set to 7kg and adjusted through testing. Once the final suitable pressure for stable operation is determined, for example, 8kg±0.5kg, this value is the "pre-set pressure parameter." The pressure actuator 1 slowly moves the pressure push rod 2 in the opposite direction of the original pressure, reducing the pressure and causing the pressure P1 to drop until the pressure P1 applied to the workpiece returns to near the midpoint of the set range; the midpoint of the set range refers to the midpoint corresponding to the above pressure range. Because this design method uses real-time pressure feedback adjustment, the pressure / pressure should be set with an allowable positive and negative error.

[0059] 8. Such as Figure 5As shown, during cooling, as the temperature drops, the volume of all materials in the heating chamber shrinks and causes the pressure to drop. The high-precision pressure sensor 5 feeds back the pressure value to the control system. If necessary, a value below the lower limit of the set warning value pressure range will cause the pressure control system 7 to react; the pressure control system 7 automatically calculates the pressure value and action direction that should be increased based on the pressure parameter value set in advance, and immediately transmits the parameter signal to the pressure actuator 1, so that the pressure is increased and the pressure is increased; the pressure actuator 1 slowly moves the pressure push rod 2 in the original positive direction of the pressure, so that the pressure returns to near the median position within the set range, and repeats the process until the lamination action needs to end.

[0060] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in this industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with this profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A method for automatically controlling pressure during lamination, characterized in that: include, S1, after starting the lamination process, the upper pressure plate (3) is controlled to descend until the surface of the pressure area detection component (6) contacts the pressure-bearing surface of the workpiece, and the area of the workpiece subjected to pressure in real time is detected to be S1. When the feedback value of the pressure sensor (5) is N1, the pressure P1 on the surface of the workpiece at this time is calculated. When the value of the pressure P1 reaches the set warning value P, the pressure is stopped; S2, after stopping the pressure application, the heating chamber is heated. As the temperature rises, the volume of the material in the heating chamber expands, causing the pressure value to increase. The pressure control system (7) controls the pressure actuator (1) to slowly move the pressure push rod (2) in the opposite direction of the original pressure application, so that the pressure value decreases until the pressure applied to the workpiece is restored to within the set warning value P range; S3, the heating chamber is cooled. As the temperature drops, the volume of the material in the heating chamber shrinks, causing the pressure value to drop. The pressure control system (7) controls the pressure actuator (1) to slowly move the pressure push rod (2) in the positive direction of the original pressure, thereby increasing the pressure value until the pressure applied to the workpiece is restored to within the set warning value P. The process is repeated until the lamination action needs to be terminated.

2. The method for automatic pressure control during lamination according to claim 1, characterized in that: The warning value P is 70% to 80% of the upper limit of the pressure that the workpiece can withstand based on the design characteristics or material characteristics of the workpiece itself. The calculated pressure value P that the workpiece is suitable to withstand is the warning value P.

3. The method for automatic pressure control during lamination according to claim 1, characterized in that: S2 is specifically as follows: after the lamination process is started, the upper pressure plate (3) is controlled by the computer (8) to first descend at a uniform speed to a position close to the surface of the workpiece, and then descend at a slow speed until the surface of the pressure area detection component 6 contacts the pressure-bearing surface of the workpiece, and the area S1 of the workpiece subjected to pressure in real time is detected. When the feedback value of the pressure sensor (5) is N1, the computer (8) automatically divides it by the area S1 of the workpiece subjected to pressure detected by the pressure area detection component (6) at this time, and obtains the surface pressure value P1 of the workpiece at this time. When the value of P1 detected reaches the warning value P, the computer (8) controls the pressure rod to stop continuing to pressurize, so that the pressure plate remains in this position.

4. The method for automatic pressure control during lamination according to claim 3, characterized in that: When the upper pressure plate (3) first descends at a uniform speed to a position close to the surface of the workpiece, the pressure push rod (2) moves at a speed of 0.5 mm / s to 2 mm / s.

5. The method for automatic pressure control during lamination according to claim 3, characterized in that: When the pressure push rod (2) contacts the pressure-bearing surface of the workpiece, the moving speed is 0.05 mm / s to 0.1 mm / s.

6. The method for automatic pressure control during lamination according to claim 1, characterized in that: The heating chamber is heated, and the volume expansion of the material in the heating chamber causes the pressure to increase. The pressure sensor (5) feeds back the pressure value at this time to the pressure control system (7); the pressure control system (7) automatically calculates the pressure value to be reduced and the direction of action based on the pressure parameter value set in advance and the pressure exceeding the upper limit of the set warning value, and transmits the parameter signal to the pressure actuator (1); the pressure actuator (1) slowly moves the pressure push rod (2) in the opposite direction of the original pressure, so that the pressure value decreases, until the pressure applied to the workpiece is restored to within the set warning value P range.

7. The method for automatically controlling pressure during lamination according to claim 1, characterized in that: In S3, the heating chamber is cooled. As the temperature drops, the volume of the material in the heating chamber shrinks, causing the pressure to drop. The pressure sensor (5) feeds back the pressure value to the pressure control system (7). If the pressure value is lower than the lower limit of the set warning value P pressure range, the pressure control system (7) automatically calculates the pressure value and the direction of action that should be increased based on the pressure parameter value set in advance, and immediately transmits the parameter signal to the pressure actuator (1). The pressure actuator (1) slowly moves the pressure push rod (2) in the original positive direction of the pressure, so that the pressure value is increased until the pressure applied to the workpiece is restored to within the set warning value P range, and repeats the process until the lamination action needs to be terminated.

8. A pressure automatic control mechanism in a lamination process, based on the pressure automatic control method in a lamination process according to any one of claims 1 to 7, characterized in that: The invention comprises an upper pressure plate (3), a lower pressure plate (4), a pressure area detection component (6), a computer (8), a pressure control system (7) and a pressure actuator (1), wherein the pressure area detection component (6) is installed on the plate surface of the upper pressure plate (3), and the pressure actuator (1) is provided with a pressure sensor (5); the pressure actuator (1) is connected to the upper pressure plate (3) and the lower pressure plate (4) respectively through a pressure push rod (2); when laminating, the workpiece is placed on the plate surface of the lower pressure plate (4), and the pressure control system (7) is respectively connected to the pressure area detection component (6) and the pressure sensor (5); and the computer (8) is connected to the pressure control system (7).

9. The automatic pressure control mechanism in the lamination process according to claim 8, characterized in that: The pressure area detection assembly (6) comprises a base plate (61) and mechanical sensors (62), and the mechanical sensors (62) are mounted on the base plate (61) in an array arrangement.

10. The automatic pressure control mechanism in the lamination process according to claim 8, characterized in that: The upper pressing plate (3) and the lower pressing plate (4) are arranged in parallel.

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