Deterioration detection method, deterioration detection device, and deterioration detection program

Abstract

Provided are a degradation detection method, a degradation detection device, and a degradation detection program with which it is possible to easily detect degradation of an elastic member. A deterioration detection method according to the present invention 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 held by the mold, the deterioration detection device comprising: a movement amount detector that detects a movement amount of the elastic member; a press-in distance detection unit that detects a press-in distance from a starting point of a pressurization operation to a point at which a target pressure is reached; and a control device. The deterioration detection method comprises: a step in which the control device causes the movement amount detector to measure the press-in distance; and a step in which the control device determines that the elastic member has deteriorated when the press-in distance is greater than the threshold value.

Description

Technical Field

[0001] This invention relates to a degradation detection method, a degradation detection device, and a degradation detection procedure. Background Technology

[0002] Patent Document 1 describes a hot-pressing buffer material used between the compressed body and the hot plate during the extrusion molding of a compressed body made of multiple laminated raw materials by heating and pressurizing. The ratio (a∶b) of the compression thickness deformation (a) obtained by subtracting the compression thickness (H2) under the specified extrusion molding pressure from the initial thickness (H1) to the rebound thickness deformation (b) obtained by subtracting the compression thickness (H2) from the depressurization thickness (H3) after the extrusion molding pressure is removed is 1∶1 to 1∶0.8.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2009-137208 Patent Document 2: Japanese Patent Application Publication No. 07-004468 Summary of the Invention

[0004] If repeated heating and pressurization are applied, the recovery rate of the cushioning material will decrease, but it is difficult to judge the degree of deterioration by visual inspection.

[0005] This invention was made to solve this problem, and its purpose is to provide a degradation detection method, degradation detection device and degradation detection procedure that can easily detect the degradation of elastic components.

[0006] One aspect of the present invention relates to a degradation detection method using a degradation detection device for detecting degradation of an elastic component mounted on a mold of a manufacturing equipment, the manufacturing equipment heating and pressurizing a workpiece held by the mold. The degradation detection device includes: a movement detector that detects the indentation distance from the start of the pressurization action to the point where a target pressure is reached; and a control device. The degradation detection method comprises: the control device causing the movement detector to detect the indentation distance; and the control device determining that the elastic component has degraded if the indentation distance is greater than a threshold value.

[0007] One aspect of the present invention relates to a degradation detection device for detecting degradation of an elastic component mounted on a mold of a manufacturing equipment, the manufacturing equipment heating and pressurizing a workpiece held by the mold. The degradation detection device comprises: a displacement detector that detects the indentation distance from the start of the pressurization action to the point where a target pressure is reached; and a control device that causes the displacement detector to measure the indentation distance, and determines that the elastic component has degraded if the indentation distance is greater than a threshold.

[0008] One aspect of the present invention relates to a degradation detection procedure that uses a degradation detection device for detecting degradation of an elastic component mounted on a mold of a manufacturing equipment, the manufacturing equipment heating and pressurizing a workpiece held by the mold. The degradation detection device includes: a movement detector that detects the indentation distance from the start of the pressurization action to the point where a target pressure is reached; and a control device that causes a computer to perform the following processing: causing the movement detector to measure the indentation distance; and determining that the elastic component has degraded if the indentation distance is greater than a threshold.

[0009] Invention Effects This invention provides a degradation detection method, a degradation detection device, and a degradation detection procedure that can easily detect the degradation of elastic components. Attached Figure Description

[0010] Figure 1 This is a perspective view illustrating the manufacturing equipment involved in Embodiment 1.

[0011] Figure 2 (a) is a perspective view illustrating the processing unit in the manufacturing equipment according to Embodiment 1. Figure 2 (b) is a schematic diagram illustrating the processing unit in the manufacturing equipment according to Embodiment 1.

[0012] Figure 3 (a) is a perspective view illustrating a battery pack including a workpiece processed by the manufacturing equipment according to Embodiment 1. Figure 3 (b) is a cross-sectional view illustrating a battery pack including a workpiece processed by the manufacturing equipment according to Embodiment 1, showing a section cut along plane III of (a).

[0013] Figure 4 This is a block diagram illustrating the degradation detection device according to Embodiment 1.

[0014] Figure 5 This is a block diagram illustrating the control device of the degradation detection apparatus according to Embodiment 1.

[0015] Figure 6(a) is a flowchart illustrating a method for manufacturing a workpiece according to Embodiment 1. Figure 6 (b) is a flowchart illustrating the degradation detection method according to Embodiment 1. Detailed Implementation

[0016] The specific structure of this embodiment will now be described with reference to the accompanying drawings. The following description illustrates preferred embodiments of the invention, but the scope of the invention is not limited to these embodiments. Furthermore, not all structures described in this embodiment are necessarily necessary to solve the problem. For clarity, appropriate omissions and simplifications have been made in the following descriptions and drawings. In the drawings, the same symbols are used to denote the same elements, and repeated descriptions have been omitted as necessary.

[0017] <Implementation Method 1> The manufacturing equipment and deterioration detection device in this embodiment will be described. Figure 1 This 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 apparatus 100 according to Embodiment 1. Figure 2 (b) is a schematic diagram illustrating the processing unit 120 in the manufacturing apparatus 100 according to Embodiment 1. Figure 2 In (a), workpiece 140 is omitted. For example... Figure 1 and Figure 2 As shown, the manufacturing equipment 100 includes a conveyor 110, a processing unit 120, and a control unit 130. The manufacturing equipment 100 performs prescribed treatments such as heating and pressurizing on the workpiece 140.

[0018] For ease of explanation of the manufacturing equipment 100, an XYZ orthogonal coordinate system is used here. For example, the conveying direction of the workpiece 140 is defined as the X-axis. The two directions orthogonal to and mutually orthogonal to the X-axis are defined as the Y-axis and Z-axis. The +Z-axis is referred to as "up" and the -Z-axis as "down." Note that "up" and "down" are used for ease of explanation of the manufacturing equipment 100 and do not represent the actual orientation of the manufacturing equipment.

[0019] The conveyor table 110 conveys the workpiece 140. For example, the conveyor table 110 conveys the workpiece 140 along the +X axis direction. The processing unit 120 is disposed on the +Y axis side of the conveyor table 110. The processing unit 120 may also be disposed on the -Y axis side of the conveyor table 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.

[0020] The mold 150 includes an upper mold 151 and a lower mold 152. The mold 150 clamps the workpiece 140 between the upper mold 151 and the lower mold 152. The mold 150 uses the upper mold 151 and the lower mold 152 to apply pressure to the workpiece 140 from above and below. The upper mold 151 moves downward by being driven by the drive unit 160. The lower mold 152 may also be configured to receive the workpiece 140. Alternatively, the lower mold 152 may also move upward by being driven by the drive unit 160.

[0021] An elastic member is mounted on either the upper mold 151 or the lower mold 152. In the figure, the elastic member is mounted on the lower mold 152. Alternatively, the elastic member may also be mounted on the upper mold 151. The elastic member may include, for example, rubber 153. Rubber 153 may be fluororubber. In the following description, the elastic member is referred to as rubber 153. Furthermore, the elastic member may include any component other than rubber 153, as long as it is an elastic component. For example, the elastic member may include a spring component.

[0022] Rubber 153 is mounted on the upper surface of the lower mold 152. Rubber 153 can contact the workpiece 140 disposed between the upper mold 151 and the lower mold 152. Rubber 153 is disposed between the workpiece 140 and the lower mold 152. Alternatively, when rubber 153 is mounted on the upper mold 151, rubber 153 is mounted on the lower surface of the upper mold 151 and disposed between the workpiece 140 and the upper mold 151.

[0023] Rubber 153 may include a first rubber 154 and a second rubber 155. Rubber 153 may also 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 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 mounted on 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, even in this case, the second rubber 155 is disposed closer to the workpiece 140 than the first rubber 154. The second rubber 155 is disposed between the first rubber 154 and the workpiece 140.

[0024] The first rubber 154 has a first hardness. The second rubber 155 has a second hardness. The second hardness can be greater than the first hardness. For example, the first hardness of the first rubber 154 can be Shore 60°. The second hardness of the second rubber 155 can 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, the overall deformation of the rubber 153 can be suppressed. Therefore, the detection accuracy of the indentation distance can be improved. Alternatively, the second hardness can be less than the first hardness. Since the second hardness of the second rubber 155 disposed on the workpiece 140 side is less than the first hardness of the first rubber 154, the buffering effect on the workpiece 140 can be improved, thus protecting the workpiece 140. The second hardness can be the same as the first hardness.

[0025] The drive unit 160 drives the mold 150. The drive unit 160 may include, for example, a servo motor or other electric motor. The drive unit 160 may include an electric motor equipped with an encoder unit. The drive unit 160 may include an electric motor that drives the upper mold 151. Additionally, the drive unit 160 may include an electric motor that drives the lower mold 152. The drive unit 160 clamps the workpiece 140 from above and below via the upper mold 151 and lower mold 152, thereby applying pressure to the workpiece 140. Specifically, the drive unit 160 moves the upper mold 151 along the -Z-axis direction. The lower mold 152 can be fixed in position. Alternatively, the drive unit 160 can also move the lower mold 152 along the +Z-axis direction.

[0026] Heating unit 170 heats workpiece 140. Heating unit 170 includes, for example, a heater. Heating unit 170 is mounted on either upper mold 151 or lower mold 152. In the figure, heating unit 170 is mounted on the lower surface of upper mold 151. Therefore, heating unit 170 is positioned between upper mold 151 and workpiece 140. In this case, rubber 153 is mounted on lower mold 152. Alternatively, heating unit 170 may also be mounted on the upper surface of lower mold 152. In this case, rubber 153 is mounted on upper mold 151.

[0027] The detection unit 180 may include a movement detection unit 181, a temperature detection unit 182, and a pressure detection unit 183. The movement detection unit 181 detects the movement of the mold 150. Specifically, the movement detection unit 181 detects the movement of the upper mold 151 and the lower mold 152. Based on the relative movement of the upper mold 151 relative to the lower mold 152, the movement detection unit 181 measures the pressing distance from the starting point of the pressurizing action based on the mold 150 to the location where the target pressure is reached. The starting point of the pressurizing action includes the location where the pressure reaches a predetermined value. The pressing distance includes the amount of deformation of the rubber 153. The movement detection unit 181 may, for example, include an encoder mounted on the drive unit 160.

[0028] Temperature detection unit 182 includes, for example, a temperature sensor installed in processing unit 120. Pressure detection unit 183 includes, for example, a pressure sensor installed in processing unit 120. Movement detection unit 181, temperature detection unit 182, and pressure detection unit 183 in detection unit 180 output the detected results to control unit 130.

[0029] The control unit 130 is connected to the drive unit 160, heating unit 170, and detection unit 180 in the processing unit 120 to transmit information. The control unit 130 controls the drive unit 160. The control unit 130 controls the heating unit 170. The control unit 130 obtains detection results from the detection unit 180.

[0030] 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. Figure 3 (b) is a cross-sectional view illustrating a battery pack 190 comprising a workpiece 140 processed by the manufacturing equipment 100 according to Embodiment 1, showing a section cut along plane III of (a). Figure 3 As shown, workpiece 140 may include, for example, one battery cell from battery pack 190 such as a lithium-ion battery cell. Furthermore, workpiece 140 is not limited to one battery cell from battery pack 190, as long as it is heated and pressurized by manufacturing equipment 100.

[0031] The battery pack 190 includes, for example, a positive electrode foil 144a serving as the positive electrode 141 and a negative electrode foil 144b serving as the negative electrode. The battery pack 190 has a laminated body with alternating layers of multiple bipolar electrodes 145 and multiple separators 146 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. At the end of the battery pack 190, the bipolar electrode 145 protrudes. The end of the protruding bipolar electrode 145 is covered by a sealant 148a. The ends of the multiple bipolar electrodes 145 covered by the sealant 148a are laminated with spacers 148b and separators 146 respectively. The laminated body of the sealant 148a, spacers 148b, and separators 146 is disposed between an upper weld overlay sealant 147a and a lower weld overlay sealant 147b. Connector 142, which is connected to battery pack 190, is connected to a voltmeter for detecting voltage.

[0032] Workpiece 140 is, for example, a battery cell including separator 146 and bipolar electrodes 145. Upper mold 151 contacts the upper surface of the end of the battery cell via heating element 170. Lower mold 152 contacts the lower surface of the end of the battery cell via rubber 153. Manufacturing equipment 100 then heats and pressurizes workpiece 140 sandwiched between upper mold 151 and lower mold 152. As a result, the seal 148a, spacer 148b, and the welded portion 149 of separator 146 are welded together. In subsequent processes, multiple battery cells are stacked to form battery pack 190.

[0033] Next, the deterioration detection device for detecting the deterioration of rubber 153 will be described. Specifically, the deterioration detection device is used to detect the deterioration of rubber 153 mounted on mold 150 of manufacturing equipment 100, which heats and pressurizes the workpiece 140 held by mold 150.

[0034] Figure 4 This is a block diagram illustrating the degradation detection device 200 according to Embodiment 1. Figure 4 As shown, the deterioration detection device 200 includes a movement detector 210 and a control device 220. The manufacturing equipment 100 may also include the deterioration detection device 200. In addition, the deterioration detection device 200 may be configured as a separate unit independent of the manufacturing equipment 100.

[0035] The movement amount detector 210 is used to detect the pressing distance from the starting point of the pressing action of the mold 150 to the point where the target pressure is reached. The movement amount detector 210 detects the pressing distance of the mold 150 based on the relative movement of the upper mold 151 relative to the lower mold 152. The pressing distance includes the amount of deformation of the rubber 153. The movement amount detector 210 may include the aforementioned movement amount detection unit 181. The movement amount detector 210 outputs the detected pressing distance to the control device 220.

[0036] The control device 220 is connected to the drive unit 160, heating unit 170, and detection unit 180 in the processing unit 120 to transmit information. The control device 220 controls the drive unit 160. The control device 220 controls the heating unit 170. The control device 220 acquires detection results from the detection unit 180 and the movement amount detector 210. The control unit 130 may include the control device 220. The control device 220 may be configured as a separate unit independent of the control unit 130. The control device 220 causes the movement amount detector 210 to measure the indentation distance. If the indentation distance obtained by the movement amount detector 210 is greater than a threshold, the control device 220 determines that the rubber 153 has deteriorated.

[0037] Figure 5 This is a block diagram illustrating the control device 220 of the degradation detection device 200 according to Embodiment 1. Figure 5 As shown, the control device 220 may include, for example, an information processing device such as a personal computer, a microcomputer, or a server. Additionally, the control unit 130 may also include an information processing device. Therefore, the control device 220 described below can be replaced with the control unit 130.

[0038] The control device 220 may include a processor PRC, a memory MMR, a storage device STR, and a user interface UI. The storage device STR stores the processing performed by each component of the control device 220 as a program. The processor PRC reads the program from the storage device STR into the memory MMR and executes the program. Thus, the processor PRC implements the functions of each component in the control device 220. The user interface UI may include input devices such as a keyboard, mouse, and camera, as well as output devices such as a display, printer, and speaker.

[0039] Each component of the control device 220 can be implemented by dedicated hardware. Furthermore, some or all of each component can be implemented by general-purpose or special-purpose circuitry and a processor PRC, or a combination thereof. These can be constructed from a single chip or from multiple chips connected via a bus. Some or all of each component can be implemented by a combination of the aforementioned circuitry and a program. Moreover, the processor PRC can be a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), a FPGA (Field-Programmable Gate Array), a quantum processor (quantum computer control chip), etc.

[0040] Furthermore, when some or all of the components of the control device 220 are implemented by multiple control devices 220 and circuits, these multiple control devices 220 and circuits can be centrally or distributed. For example, the control devices 220 and circuits can be implemented as client-server systems, cloud computing systems, etc., connected separately via communication networks. Moreover, the functionality of the control device 220 can be provided in a SaaS (Software as a Service) format.

[0041] The storage device STR can store threshold values ​​for multiple indentation distances corresponding to multiple target temperatures during heating and multiple target pressures during pressurization. For example, the storage device STR can store a first threshold value for the indentation distance corresponding to a first target temperature and a first target pressure, and a second threshold value for the indentation distance corresponding to a second target temperature and a second target pressure. When the manufacturing equipment heats at the first target temperature and pressurizes at the first target pressure, if the indentation distance is greater than the first threshold value corresponding to the first target temperature and the first target pressure performed by the manufacturing equipment, the control device 220 determines that the rubber 153 has deteriorated.

[0042] Furthermore, the storage device STR can store threshold values ​​corresponding to the combination of the first rubber 154 and the second rubber 155. Specifically, when the second hardness of the second rubber 155 disposed between the workpiece 140 and the first rubber 154 is greater than its first hardness, the storage device STR can store threshold values ​​for multiple indentation distances corresponding to multiple target temperatures during heating and multiple target pressures during pressurization. Furthermore, when the second hardness of the second rubber 155 disposed between the workpiece 140 and the first rubber 154 is less than its first hardness, the storage device STR can store threshold values ​​for multiple indentation distances corresponding to multiple target temperatures during heating and multiple target pressures during pressurization. This improves the detection accuracy of rubber 153 deterioration.

[0043] Next, the manufacturing method of workpiece 140 and the deterioration detection method of rubber 153 will be explained. Figure 6 (a) is a flowchart illustrating a method for manufacturing the workpiece 140 according to Embodiment 1. Figure 6 (b) is a flowchart illustrating the degradation detection method according to Embodiment 1. For example... Figure 6 As shown in (a), the manufacturing method of workpiece 140 includes: step S11 of starting the pressurization operation, step S12 of reaching the target pressure, step S13 of determining whether the rubber 153 has deteriorated, and step S14 of notifying the deterioration determination.

[0044] In step S11, the control unit 130 causes the processing unit 120 to begin pressurizing the workpiece 140. Specifically, the control unit 130 heats and pressurizes the workpiece 140 held by the mold 150 by activating the heating unit 170 and the driving unit 160.

[0045] In step S12, the control unit 130 causes the pressure on the workpiece 140 held by the mold 150 to reach the target pressure. Specifically, the control unit 130 activates the heating unit 170 to bring the temperature of the workpiece 140 to the target temperature. Furthermore, the control unit 130 activates the drive unit 160 to bring the pressure on the workpiece 140 to the target pressure.

[0046] In step S13, the control unit 130 causes the control device 220 to determine whether the rubber 153 has deteriorated. In step S13, if the rubber has deteriorated (in the case of "yes"), the process proceeds to step S14. In step S14, the control unit 130 causes the control device 220 to notify the user of the deterioration determination.

[0047] In step S13, if the rubber 153 has not deteriorated (in the case of "No"), the process returns to step S11. For example, the control unit 130 causes the processing unit 120 to remove the processed workpiece 140 from the manufacturing equipment 100. The control unit 130 causes the processing unit 120 to set a new workpiece 140. Then, the control unit 130 causes the processing unit 120 to start the pressurization operation on the workpiece 140.

[0048] like Figure 6 As shown in (b), the method for detecting the deterioration of rubber 153 illustrates the aforementioned... Figure 6 The specific steps of step S13 in (a) are as follows. The deterioration detection method for rubber 153 includes step S21 of detecting the indentation distance, step S22 of determining whether the indentation distance is greater than the threshold, step S23 of determining that rubber 153 is deteriorated, and step S24 of determining that rubber 153 is not deteriorated.

[0049] In step S21, the control device 220 causes the motion detector 210 to detect the indentation distance. Thus, the motion detector 210 is used to detect the indentation distance from the start of the pressurization action to the point where the target pressure is reached.

[0050] In step S22, the control device 220 determines whether the pressing distance detected by the movement amount detector 210 is greater than a threshold. If the pressing distance is greater than the threshold (in the "yes" case), as shown in step S23, the control device 220 determines that the rubber 153 has deteriorated. Conversely, if the pressing distance is less than the threshold (in the "no" case), as shown in step S24, the control device 220 determines that the rubber 153 has not deteriorated.

[0051] Thus, the manufacturing equipment 100 processes the workpiece 140. The deterioration detection device 200 determines the deterioration of the rubber 153.

[0052] Next, the effects of this embodiment will be explained. In the deterioration detection device 200 of this embodiment, when the indentation distance is greater than a threshold, the control device 220 determines that the rubber 153 has deteriorated. Therefore, the deterioration detection device 200 can easily detect the deterioration of the rubber 153.

[0053] For example, when workpiece 140 is a Li battery cell, in the process of welding electrode foils such as positive electrode foil 144a and negative electrode foil 144b, and sealing element 148a such as bipolar electrode 145 to separator 146, for example, the lower surface of the Li battery cell is supported by a lower mold 152 with rubber 153 installed. On the other hand, an upper mold 151 with a heating part 170 such as a hot soldering iron is pressed onto the upper surface of the Li battery cell. Thus, the processing unit 120 performs welding. The pressure detection unit 183 detects the pressure at any time and completes the processing by applying pressure at a target pressure of more than a specified amount for a specified time. The upper mold 151 and lower mold 152 are driven by a drive unit 160 such as a servo motor. In such a manufacturing equipment 100, the rubber 153 is repeatedly heated and pressurized, and therefore gradually deteriorates. The degree of deterioration is inspected by personnel, for example. In this embodiment, the deterioration of the rubber 153 is automatically detected in the manufacturing process of workpiece 140 by the deterioration detection device 200. Therefore, inspection by staff is unnecessary, thus improving operational efficiency. Furthermore, the number of inspection procedures can be reduced. Consequently, it can suppress the deterioration of rubber 153 that may be missed due to human error during inspection, thereby reducing the production of defective products.

[0054] Rubber 153 includes a first rubber with a first hardness and a second rubber with a second hardness. Thus, by combining rubbers 153 of various hardnesses, the detection accuracy of the indentation distance and the protection of the workpiece 140 can be adjusted. The control device 220 uses a threshold corresponding to the target temperature and target pressure to determine the deterioration of the rubber 153. Therefore, the accuracy of deterioration determination can be improved.

[0055] Furthermore, the present invention is not limited to the above-described embodiments, and appropriate modifications can be made without departing from the spirit of the invention. The execution of degradation detection programs for each process involved in the degradation detection method using the degradation detection device 200 by a computer also falls within the scope of the technical concept of this embodiment.

[0056] Symbol Explanation 100 - Manufacturing equipment, 110 - Conveyor table, 120 - Processing unit, 130 - Control unit, 140 - Workpiece, 141 - Positive electrode, 142 - Connector, 144a - Positive electrode foil, 144b - Negative electrode foil, 145 - Bipolar electrode, 145a - Positive electrode, 145b - Negative electrode, 146 - Separator, 147a, 147b - Welded seals, 148a - Seals, 148b - Spacers, 149 - Welded part, 150 - Mold, 151 - Upper Mold, 152-lower mold, 153-rubber, 154-first rubber, 155-second rubber, 160-drive unit, 170-heating unit, 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 device, UI-user interface.

Claims

1. A deterioration detection method which is a deterioration detection method using a deterioration detection device for detecting deterioration of an elastic member attached to a mold of a manufacturing apparatus that performs heating and pressurization of a work held by the mold, characterized by comprising: the deterioration detection device having: a movement amount detector that detects a press-in distance from a start point of a pressurization operation to a point at which a target pressure is reached; and a control device, the deterioration detection method comprising: a step in which the control device causes the movement amount detector to detect the press-in distance; and a step in which, in a case where the press-in distance is greater than a threshold value, the control device determines that the elastic member has deteriorated.

2. The deterioration detection method according to claim 1, characterized in that: the elastic member includes rubber, the rubber includes: a first rubber of a first hardness; and a second rubber disposed between the work and the first rubber and having a second hardness that is greater than the first hardness.

3. The deterioration detection method according to claim 1 or 2, characterized in that: the control device includes: a storage device for storing threshold values of the press-in distance corresponding to a plurality of target temperatures in the heating and a plurality of the target pressures in the pressurization, in the determining step, in a case where the press-in distance is greater than the threshold value corresponding to the target temperature and the target pressure by the manufacturing apparatus, the control device determines that the elastic member has deteriorated.

4. A deterioration detection device for detecting deterioration of an elastic member attached to a mold of a manufacturing apparatus that performs heating and pressurization of a work held by the mold, the deterioration detection device comprising: a movement amount detector that detects a press-in distance from a start point of a pressurization operation to a point at which a target pressure is reached; and a control device, the control device performing processing of: causing the movement amount detector to measure the press-in distance; and in a case where the press-in distance is greater than a threshold value, determining that the elastic member has deteriorated.

5. A deterioration detection program which is a deterioration detection program using a deterioration detection device for detecting deterioration of an elastic member attached to a mold of a manufacturing apparatus that performs heating and pressurization of a work held by the mold, the deterioration detection device comprising: a movement amount detector that detects a press-in distance from a start point of a pressurization operation to a point at which a target pressure is reached; and a control device, the deterioration detection program causing a computer to perform processing of: causing the movement amount detector to measure the press-in distance; and in a case where the press-in distance is greater than a threshold value, determining that the elastic member has deteriorated. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 4. A deterioration detecting device characterized by comprising: ​ ​ ​ ​ ​ ​ 5. A deterioration detection program characterized by comprising: ​ ​ ​ ​ ​ ​ ​

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