Degradation detection method, degradation detection device, and degradation detection program

Abstract

This invention provides a deterioration detection method, a deterioration detection device, and a deterioration detection program that can easily detect the deterioration of elastic members. [Solution] The deterioration detection method according to the present disclosure is a deterioration detection method using a deterioration detection device 200 for detecting deterioration of an elastic member attached to a mold 150 of a manufacturing facility 100 that heats and pressurizes a workpiece 140 sandwiched between molds 150, wherein the deterioration detection device 200 includes a displacement detector 210 for detecting the indentation distance from the starting point of the pressurizing operation to the point where the target pressure is reached, and a control device 220, and comprises the steps of the control device 220 causing the displacement detector 210 to measure the indentation distance, and the control device 220 determining that the elastic member has deteriorated if the indentation distance is greater than a threshold.

Description

Technical Field

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[0001] The present disclosure relates to a degradation detection method, a degradation detection device, and a degradation detection program.

Background Art

[0002] In Patent Document 1, when performing press molding of a laminate by heating and pressurizing a compressed body in which a plurality of laminate material sheets are stacked, a heat press cushion material used between the compressed body and the hot plate, the compression thickness deformation amount (a) obtained by subtracting the compression thickness dimension (H2) when a predetermined press molding pressure is applied from the initial thickness dimension (H1), and the ratio (a:b) of the elastic thickness deformation amount (b) obtained by subtracting the compression thickness dimension (H2) from the pressure release thickness dimension (H3) when the press molding pressure is removed is 1:1 to 1:0.8, a heat press cushion material is described.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] When repeated heating and pressurization are performed, the recovery rate of the cushion material decreases, but it is difficult to visually determine the degree of degradation.

[0005] The present disclosure has been made to solve such problems, and an object thereof is to provide a degradation detection method, a degradation detection device, and a degradation detection program that can easily detect degradation of an elastic member.

Means for Solving the Problems

[0006] A deterioration detection method according to one aspect of the present disclosure is a deterioration detection method using a deterioration detection device for detecting deterioration of an elastic member attached to a mold of a manufacturing facility that heats and pressurizes a workpiece sandwiched between molds, wherein the deterioration detection device comprises a displacement detector for detecting the indentation distance from the starting point of the pressurizing operation to the point where a target pressure is reached, and a control device, the method comprising the steps of the control device causing the displacement detector to detect the indentation distance, and the control device determining that the elastic member has deteriorated if the indentation distance is greater than a threshold.

[0007] A deterioration detection device according to one aspect of the present disclosure is a deterioration detection device for detecting deterioration of an elastic member attached to a mold of a manufacturing facility that heats and pressurizes a workpiece sandwiched between molds, comprising: a displacement detector for detecting the indentation distance from the starting point of the pressurizing operation to the point where a target pressure is reached; and a control device, wherein the control device causes the displacement detector to measure the indentation distance, and determines that the elastic member has deteriorated if the indentation distance is greater than a threshold.

[0008] A deterioration detection program according to one aspect of the present disclosure is a deterioration detection program using a deterioration detection device for detecting deterioration of an elastic member attached to a mold of a manufacturing facility that heats and pressurizes a workpiece sandwiched between molds, wherein the deterioration detection device comprises a displacement detector for detecting the indentation distance from the starting point of the pressurizing operation to the point where the target pressure is reached, and a control device, and causes the computer to measure the indentation distance using the displacement detector and to determine that the elastic member has deteriorated if the indentation distance is greater than a threshold. [Effects of the Invention]

[0009] This disclosure provides a deterioration detection method, a deterioration detection device, and a deterioration detection program that can easily detect the deterioration of an elastic member. [Brief explanation of the drawing]

[0010] [Figure 1] This is a perspective view illustrating the manufacturing equipment according to Embodiment 1. [Figure 2] (a) is a perspective view illustrating a processing unit in the manufacturing equipment according to Embodiment 1, and (b) is a schematic diagram illustrating a processing unit in the manufacturing equipment according to Embodiment 1. [Figure 3] (a) is a perspective view illustrating a battery pack containing a workpiece processed by the manufacturing equipment according to Embodiment 1, and (b) is a cross-sectional view illustrating a battery pack containing a workpiece processed by the manufacturing equipment according to Embodiment 1, showing a cross-section of surface III of (a). [Figure 4] This is a block diagram illustrating a deterioration detection device according to Embodiment 1. [Figure 5] This is a block diagram illustrating the control device of the deterioration detection device according to Embodiment 1. [Figure 6] (a) is a flowchart illustrating a method for manufacturing a workpiece according to Embodiment 1, and (b) is a flowchart illustrating a method for detecting deterioration according to Embodiment 1. [Modes for carrying out the invention]

[0011] The specific configuration of this embodiment will be described below with reference to the drawings. The following description illustrates preferred embodiments of the disclosure, and the scope of the disclosure is not limited to the following embodiments. Furthermore, not all of the configurations described in this embodiment are necessarily essential as means to solve the problem. For clarity of explanation, the following descriptions and drawings have been omitted and simplified as appropriate. In each drawing, the same elements are denoted by the same reference numerals, and redundant explanations have been omitted as necessary.

[0012] <Embodiment 1> The manufacturing equipment and deterioration detection device in this embodiment will be described. Figure 1 is a perspective view illustrating the manufacturing equipment 100 according to Embodiment 1. Figure 2(a) is a perspective view illustrating the processing unit 120 in the manufacturing equipment 100 according to Embodiment 1, and (b) is a schematic diagram illustrating the processing unit 120 in the manufacturing equipment 100 according to Embodiment 1. In Figure 2(a), the workpiece 140 is omitted. As shown in Figures 1 and 2, the manufacturing equipment 100 includes a transport stage 110, a processing unit 120, and a control unit 130. The manufacturing equipment 100 applies predetermined processing such as heating and pressurizing to the workpiece 140.

[0013] Here, for the sake of convenience in describing the manufacturing equipment 100, we introduce the XYZ Cartesian coordinate system. For example, the direction in which the workpiece 140 is transported is defined as the X-axis direction. Two directions perpendicular to the X-axis direction and mutually orthogonal are defined as the Y-axis direction and the Z-axis direction. The +Z-axis direction is called upward, and the -Z-axis direction is called downward. Note that upward and downward are for the sake of convenience in describing the manufacturing equipment 100 and do not indicate the actual direction in which the manufacturing equipment is positioned.

[0014] The transport stage 110 transports the workpiece 140. The transport stage 110 transports the workpiece 140, for example, in the +X axis direction. The processing unit 120 is located on the +Y axis side of the transport stage 110. The processing unit 120 may also be located on the -Y axis side of the transport stage 110. The processing unit 120 includes a mold 150, an elastic member, a drive unit 160, a heating unit 170, and a detection unit 180.

[0015] The mold 150 includes an upper mold 151 and a lower mold 152. The mold 150 holds the workpiece 140 between the upper mold 151 and the lower mold 152. The mold 150 applies pressure to the workpiece 140 from above and below using the upper mold 151 and the lower mold 152. The upper mold 151 moves downward by the drive of the drive unit 160. The lower mold 152 may be configured to receive the workpiece 140. The lower mold 152 may also move upward by the drive of the drive unit 160.

[0016] Either the upper mold 151 or the lower mold 152 is attached with an elastic member. In the figure, the elastic member is attached to the lower mold 152. Note that the elastic member may be attached to the upper mold 151. The elastic member includes, for example, a rubber 153. The rubber 153 may be a fluorine rubber. The following description assumes the elastic member is the rubber 153. Note that the elastic member may include a member other than the rubber 153 as long as it is an elastic member. For example, the elastic member may include a spring member.

[0017] The rubber 153 is attached to the upper surface of the lower mold 152. The rubber 153 may contact the workpiece 140 disposed between the upper mold 151 and the lower mold 152. The rubber 153 is disposed between the workpiece 140 and the lower mold 152. When the rubber 153 is attached to the upper mold 151, the rubber 153 is attached to the lower surface of the upper mold 151 and is disposed between the workpiece 140 and the upper mold 151.

[0018] The rubber 153 may include a first rubber 154 and a second rubber 155. The rubber 153 may be a laminate of the first rubber 154 and the second rubber 155. The first rubber 154 is disposed on the lower mold 152. The second rubber 155 is disposed on the first rubber 154. Therefore, the second rubber 155 is disposed closer to the workpiece 140 side than the first rubber 154. The second rubber 155 is disposed between the first rubber 154 and the workpiece 140. When the first rubber 154 and the second rubber 155 are attached to the upper mold 151, the first rubber 154 is disposed below the upper mold 151. The second rubber 155 is disposed below the first rubber 154. Therefore, in this case as well, the second rubber 155 is disposed closer to the workpiece 140 side than the first rubber 154. The second rubber 155 is disposed between the first rubber 154 and the workpiece 140.

[0019] The first rubber 154 has a first hardness. The second rubber 155 has a second hardness. The second hardness may be greater than the first hardness. For example, the first hardness of the first rubber 154 may be Shore 60°. The second hardness of the second rubber 155 may be Shore 80°. Since the second hardness of the second rubber 155 disposed on the workpiece 140 side is greater than the first hardness of the first rubber 154, deformation of the entire rubber 153 can be suppressed. Therefore, the detection accuracy of the pushing distance can be improved. Note that the second hardness may be smaller than the first hardness. Since the second hardness of the second rubber 155 disposed on the workpiece 140 side is smaller than the first hardness of the first rubber 154, the cushioning degree with respect to the workpiece 140 can be improved and the workpiece 140 can be protected. The second hardness may be the same as the first hardness.

[0020] The drive unit 160 drives the mold 150. The drive unit 160 may include, for example, a motor such as a servo motor. The drive unit 160 may include a motor to which an encoder unit is attached. The drive unit 160 may include a motor that drives the upper mold 151. Note that the drive unit 160 may include a motor that drives the lower mold 152. The drive unit 160 applies pressure to the workpiece 140 by sandwiching the workpiece 140 from above and below with the upper mold 151 and the lower mold 152. Specifically, the drive unit 160 moves the upper mold 151 in the -Z axis direction. The lower mold 152 may be fixed in position. Note that the drive unit 160 may move the lower mold 152 in the +Z axis direction.

[0021] The heating unit 170 heats the workpiece 140. The heating unit 170 includes, for example, a heater. The heating unit 170 is attached to either the upper mold 151 or the lower mold 152. In the figure, the heating unit 170 is attached to the lower surface of the upper mold 151. Therefore, the heating unit 170 is disposed between the upper mold 151 and the workpiece 140. In this case, the rubber 153 is attached to the lower mold 152. Note that the heating unit 170 may be attached to the upper surface of the lower mold 152. In this case, the rubber 153 is attached to the upper mold 151.

[0022] The detection unit 180 may include a displacement detection unit 181, a temperature detection unit 182, and a pressure detection unit 183. The displacement detection unit 181 detects the displacement of the mold 150. Specifically, the displacement detection unit 181 detects the displacement of the upper mold 151 and the displacement of the lower mold 152. The displacement detection unit 181 measures the indentation distance from the starting point of the pressurizing operation by the mold 150 to the point where the target pressure is reached, based on the relative displacement of the upper mold 151 with respect to the lower mold 152. The starting point of the pressurizing operation includes the point where the pressure reaches a predetermined value. The indentation distance includes the deformation of the rubber 153. The displacement detection unit 181 may include, for example, an encoder attached to the drive unit 160.

[0023] The temperature detection unit 182 includes, for example, a temperature sensor attached to the processing unit 120. The pressure detection unit 183 includes, for example, a pressure sensor attached to the processing unit 120. The displacement detection unit 181, temperature detection unit 182, and pressure detection unit 183 in the detection unit 180 output the detected results to the control unit 130.

[0024] The control unit 130 is connected to the drive unit 160, heating unit 170, and detection unit 180 in the processing unit 120 in a manner that enables information transmission. The control unit 130 controls the driving of the drive unit 160. The control unit 130 controls the heating of the heating unit 170. The control unit 130 acquires detection results from the detection unit 180.

[0025] Figure 3(a) is a perspective view illustrating a battery pack 190 including a workpiece 140 processed by the manufacturing equipment 100 according to Embodiment 1, and (b) is a cross-sectional view illustrating a battery pack 190 including a workpiece 140 processed by the manufacturing equipment 100 according to Embodiment 1, showing a cross-section of surface III of (a). As shown in Figure 3, the workpiece 140 includes, for example, one cell in the battery pack 190 such as a lithium battery cell. However, the workpiece 140 is not limited to one cell in the battery pack 190 such as a lithium battery cell, as long as it is heated and pressurized by the manufacturing equipment 100.

[0026] The battery pack 190 includes, for example, a positive electrode foil 144a which becomes the positive electrode 141 and a negative electrode foil 144b which becomes the negative electrode. The battery pack 190 has a laminate in which a plurality of bipolar electrodes 145 and a plurality of separators 146 are alternately stacked between the positive electrode foil 144a and the negative electrode foil 144b. One side of the bipolar electrode 145 functions as the positive electrode 145a, and the other side functions as the negative electrode 145b. Bipolar electrodes 145 protrude from the ends of the battery pack 190. The protruding ends of the bipolar electrodes 145 are covered with seals 148a. The ends of the plurality of bipolar electrodes 145 covered with seals 148a are stacked with spacers 148b and separators 146 in between. The laminate of seal 148a, spacer 148b, and separator 146 is positioned between the upper reinforced seal 147a and the lower reinforced seal 147b. Connector 142 connected to the battery pack 190 is connected to a voltmeter that detects voltage.

[0027] The workpiece 140 is, for example, a single cell including a separator 146 and a bipolar electrode 145. The upper mold 151 contacts the upper surface of the cell's end via a heating unit 170. The lower mold 152 contacts the lower surface of the cell's end via rubber 153. The manufacturing equipment 100 then heats and pressurizes the workpiece 140 sandwiched between the upper mold 151 and the lower mold 152. This welds the seal 148a, spacer 148b, and the welded portion 149 of the separator 146. In a subsequent process, multiple cells are stacked to form a battery pack 190.

[0028] Next, a deterioration detection device for detecting the deterioration of the rubber 153 will be described. Specifically, the deterioration detection device detects the deterioration of the rubber 153 attached to the mold 150 of the manufacturing equipment 100, which heats and pressurizes the workpiece 140 sandwiched between the molds 150.

[0029] Figure 4 is a block diagram illustrating a deterioration detection device 200 according to Embodiment 1. As shown in Figure 4, the deterioration detection device 200 includes a displacement detector 210 and a control device 220. The manufacturing equipment 100 may further include the deterioration detection device 200. Note that the deterioration detection device 200 may be provided as a separate unit independent of the manufacturing equipment 100.

[0030] The displacement detector 210 detects the indentation distance from the starting point of the pressurization operation by the mold 150 to the point where the target pressure is reached. The displacement detector 210 detects the indentation distance by the mold 150 from the relative displacement of the upper mold 151 relative to the lower mold 152. The indentation distance includes the deformation amount of the rubber 153. The displacement detector 210 may also include the displacement detection unit 181 described above. The displacement detector 210 outputs the detected indentation distance to the control device 220.

[0031] The control device 220 is connected to the drive unit 160, heating unit 170, and detection unit 180 in the processing unit 120 in a manner that enables information transmission. The control device 220 controls the driving of the drive unit 160. The control device 220 controls the heating of the heating unit 170. The control device 220 acquires detection results from the detection unit 180 and the displacement detector 210. The control unit 130 may include the control device 220. The control device 220 may be provided as a separate unit independent of the control unit 130. The control device 220 causes the displacement detector 210 to measure the indentation distance. The control device 220 determines that the rubber 153 has deteriorated if the indentation distance acquired by the displacement detector 210 is greater than a threshold.

[0032] Figure 5 is a block diagram illustrating the control device 220 of the degradation detection device 200 according to Embodiment 1. As shown in Figure 5, the control device 220 may include, for example, an information processing device such as a personal computer, a microcomputer, and a server. The control unit 130 may also include an information processing device. Therefore, the control device 220 in the following description may be replaced with the control unit 130.

[0033] The control device 220 may include a processor PRC, memory MMR, storage device STR, and user interface UI. The storage device STR stores programs for the processes to be executed by each component of the control device 220. The processor PRC loads the programs from the storage device STR into memory MMR and executes them. In this way, the processor PRC realizes the functions of each component in the control device 220. The user interface UI may include input devices such as a keyboard, mouse, and imaging device, as well as output devices such as a display, printer, and speaker.

[0034] Each component of the control device 220 may be implemented with dedicated hardware. Furthermore, some or all of each component may be implemented by general-purpose or dedicated circuits and processors (PRCs), or combinations thereof. These may be implemented by a single chip or by multiple chips connected via a bus. Some or all of each component may be implemented by a combination of the aforementioned circuits and programs. Additionally, a CPU (Central Processing Unit), GPU (Graphics Processing Unit), FPGA (Field-programmable Gate Array), quantum processor (quantum computer control chip), etc., can be used as the processor (PRC).

[0035] Furthermore, if some or all of the components of the control device 220 are implemented by multiple control devices 220 and circuits, etc., the multiple control devices 220 and circuits, etc. may be centrally located or distributed. For example, the control devices 220 and circuits, etc. may be implemented in a form in which each is connected via a communication network, such as a client-server system or a cloud computing system. Also, the functions of the control device 220 may be provided in SaaS (Software as a Service) format.

[0036] The storage device STR may store multiple indentation distance thresholds corresponding to multiple target temperatures in heating and multiple target pressures in pressurization. For example, the storage device STR may store a first threshold for the indentation distance corresponding to a first target temperature and a first target pressure, and a second threshold for the indentation distance corresponding to a second target temperature and a second target pressure. When the manufacturing equipment performs heating at a first target temperature and pressurization at a first target pressure, the control device 220 determines that the rubber 153 has deteriorated if the indentation distance is greater than the first threshold corresponding to the first target temperature and first target pressure performed by the manufacturing equipment.

[0037] Furthermore, the memory device STR may store threshold values ​​corresponding to combinations of the first rubber 154 and the second rubber 155. Specifically, when the second hardness of the second rubber 155 positioned between the workpiece 140 and the first rubber 154 is greater than the first hardness, the memory device STR may store threshold values ​​for multiple indentation distances corresponding to multiple target temperatures in heating and multiple target pressures in pressurization. Alternatively, when the second hardness of the second rubber 155 positioned between the workpiece 140 and the first rubber 154 is less than the first hardness, the memory device STR may store threshold values ​​for multiple indentation distances corresponding to multiple target temperatures in heating and multiple target pressures in pressurization. This improves the detection accuracy of rubber 153 deterioration.

[0038] Next, a method for manufacturing the workpiece 140 and a method for detecting deterioration of the rubber 153 will be described. Figure 6(a) is a flowchart illustrating a method for manufacturing the workpiece 140 according to Embodiment 1, and (b) is a flowchart illustrating a method for detecting deterioration according to Embodiment 1. As shown in Figure 6(a), the method for manufacturing the workpiece 140 includes a step S11 for starting a pressurizing operation, a step S12 for reaching a target pressure, a step S13 for determining whether the rubber 153 has deteriorated, and a step S14 for notifying the deterioration determination.

[0039] In step S11, the control unit 130 instructs the processing unit 120 to start a pressurizing operation on the workpiece 140. Specifically, the control unit 130 heats and pressurizes the workpiece 140, which is sandwiched between the molds 150, by operating the heating unit 170 and the drive unit 160.

[0040] In step S12, the control unit 130 increases the pressure on the workpiece 140 held by the mold 150 to the target pressure. Specifically, the control unit 130 operates the heating unit 170 to raise the temperature of the workpiece 140 to the target temperature. The control unit 130 also operates the drive unit 160 to increase the pressure on the workpiece 140 to the target pressure.

[0041] In step S13, the control unit 130 instructs the control device 220 to determine whether the rubber 153 has deteriorated. If the rubber has deteriorated in step S13 (Yes), the process proceeds to step S14. In step S14, the control unit 130 instructs the control device 220 to notify the user of the deterioration determination.

[0042] In step S13, if the rubber 153 is not deteriorated (No), the process returns to step S11. For example, the control unit 130 instructs the processing unit 120 to remove the processed workpiece 140 from the manufacturing equipment 100. The control unit 130 instructs the processing unit 120 to set a new workpiece 140. Then, the control unit 130 instructs the processing unit 120 to start applying pressure to the workpiece 140.

[0043] As shown in Figure 6(b), the method for detecting deterioration of the rubber 153 shows the specific steps of step S13 in Figure 6(a) described above. The method for detecting deterioration of the rubber 153 includes step S21 for detecting the indentation distance, step S22 for determining whether the indentation distance is greater than a threshold, step S23 for determining that the rubber 153 has deteriorated, and step S24 for determining that the rubber 153 has not deteriorated.

[0044] In step S21, the control device 220 causes the displacement detector 210 to detect the indentation distance. As a result, the displacement detector 210 detects the indentation distance from the starting point of the pressurizing operation to the point where the target pressure is reached.

[0045] In step S22, the control device 220 determines whether the indentation distance detected by the displacement detector 210 is greater than a threshold. In step S22, if the indentation distance is greater than the threshold (Yes), the control device 220 determines that the rubber 153 has deteriorated, as shown in step S23. On the other hand, in step S22, if the indentation distance is less than or equal to the threshold (No), the control device 220 determines that the rubber 153 has not deteriorated, as shown in step S24.

[0046] In this way, the manufacturing equipment 100 processes the workpiece 140. The deterioration detection device 200 determines the deterioration of the rubber 153.

[0047] Next, the effects of this embodiment will be described. In this embodiment, the deterioration detection device 200 determines that the rubber 153 has deteriorated when the indentation distance is greater than a threshold. Therefore, the deterioration detection device 200 can easily detect the deterioration of the rubber 153.

[0048] For example, when the workpiece 140 is a Li-ion battery cell, the process of welding a separator 146 to electrode foils such as positive electrode foil 144a and negative electrode foil 144b and seals 148a such as bipolar electrodes 145 involves supporting the lower surface of the Li-ion battery cell with a lower die 152 to which rubber 153 is attached. Meanwhile, an upper die 151 to which a heating element 170, such as a soldering iron, is attached is pressed against the upper surface of the Li-ion battery cell. The processing unit 120 then performs the welding. A pressure detection unit 183 continuously detects the pressure, and the processing is completed by applying pressure at a target pressure above a certain level for a predetermined time. The upper die 151 and lower die 152 are driven by a drive unit 160 such as a servo motor. In such a manufacturing facility 100, the rubber 153 deteriorates because it is repeatedly subjected to heating and pressurization. The degree of deterioration was previously left to check by a person, such as a worker. In this embodiment, the deterioration detection device 200 automatically detects the deterioration of the rubber 153 during the manufacturing process of the workpiece 140. Therefore, it eliminates the need for human checks by workers, etc., and improves work efficiency. It also reduces the number of steps required for checking. Furthermore, it suppresses the possibility of overlooking the deterioration of the rubber 153 due to human error during checking, thereby suppressing the occurrence of defective products.

[0049] The rubber 153 includes a first rubber with a first hardness and a second rubber with a second hardness. By combining rubber 153 with multiple hardnesses in this way, the detection accuracy of the indentation distance and the protection of the workpiece 140 can be adjusted. The control device 220 determines the deterioration of the rubber 153 using thresholds corresponding to the target temperature and target pressure. Therefore, the accuracy of deterioration determination can be improved.

[0050] This disclosure is not limited to the embodiments described above, and can be modified as appropriate without departing from the spirit of the invention. A degradation detection program that causes a computer to execute each process related to the degradation detection method using the degradation detection device 200 is also within the scope of the technical concept of this embodiment. [Explanation of symbols]

[0051] 100 Manufacturing equipment 110 Transport Stage 120 Processing Unit 130 Control Unit 140 Work 141 Positive electrode 142 connectors 144a Positive electrode foil 144b Negative electrode foil 145 Bipolar electrodes 145a positive electrode 145b negative electrode 146 Separator 147a, 147b Filling seal 148a Seal 148b Spacer 149 Welded part 150 type 151 Upper mold 152 Lower mold 153 Rubber 154 First Rubber 155 Second Rubber 160 Drive unit 170 Heating section 180 Detection unit 181 Movement detection unit 182 Temperature detection unit 183 Pressure detection unit 190 Battery Pack 200 Deterioration detection device 210 Movement Detector 220 Control device MMR memory PRC Processor STR storage UI User Interface

Claims

1. A deterioration detection method using a deterioration detection device for detecting deterioration of an elastic member attached to a mold of a manufacturing facility that heats and pressurizes a workpiece sandwiched between molds, The aforementioned deterioration detection device is A displacement detector that detects the indentation distance from the starting point of the pressurizing operation to the point where the target pressure is reached, Control device and It has, The control device causes the displacement detector to detect the indentation distance, The steps include: determining that the elastic member has deteriorated if the indentation distance is greater than a threshold; Equipped with Degradation detection method.

2. The elastic member includes rubber, The aforementioned rubber is First hardness rubber, A second rubber disposed between the workpiece and the first rubber, the second rubber having a second hardness greater than the first hardness, including, The deterioration detection method according to claim 1.

3. The control device is The device includes a memory device that stores threshold values ​​for a plurality of indentation distances corresponding to a plurality of target temperatures in the heating and a plurality of target pressures in the pressurizing, In the above determination step, If the indentation distance is greater than the threshold corresponding to the target temperature and target pressure performed by the manufacturing equipment, the control device determines that the elastic member has deteriorated. The deterioration detection method according to claim 1 or 2.

4. A deterioration detection device for detecting deterioration of an elastic member attached to a mold in a manufacturing facility that heats and pressurizes a workpiece sandwiched between molds, A displacement detector that detects the indentation distance from the starting point of the pressurizing operation to the point where the target pressure is reached, Control device and Equipped with, The control device is The aforementioned indentation distance is measured by the displacement detector. If the aforementioned indentation distance is greater than the threshold, it is determined that the elastic member has deteriorated. Deterioration detection device.

5. A deterioration detection program using a deterioration detection device that detects deterioration of an elastic member attached to a mold of a manufacturing facility that heats and pressurizes a workpiece sandwiched between molds, The aforementioned deterioration detection device is A displacement detector that detects the indentation distance from the starting point of the pressurizing operation to the point where the target pressure is reached, Control device and It has, The aforementioned indentation distance is measured by the displacement detector. If the aforementioned indentation distance is greater than a threshold, it is determined that the elastic member has deteriorated. A degradation detection program that has a computer perform this task.

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