Automatic replacement mold of bottle blowing machine and replacement method

Abstract

The invention discloses an automatic replacement mold of a bottle blowing machine and a replacement method, and relates to the field of bottle blowing machine manufacturing equipment.The automatic replacement mold of the bottle blowing machine comprises an extraction mechanism and a detection mechanism, the extraction mechanism is provided with a plurality of adjusting clamping jaws, and the multiple adjusting clamping jaws grab the bottle blowing machine on the extraction mechanism; the lifting mechanism is arranged on one side of the base, the adjusting clamping jaw is arranged on the lifting mechanism, the detection mechanism is arranged on one side of the lifting mechanism, the adjusting clamping jaw grabs the bottle blowing machine and places the bottle blowing machine on the detection mechanism, the detection mechanism detects parameters of the bottle blowing machine, and the bottle blowing machine can be efficiently and accurately grabbed through the lifting mechanism and the detection mechanism, and the corresponding bottle blowing machine can be replaced through the lifting mechanism and the detection mechanism.

Description

Technical Field

[0001] This application relates to the field of blow molding machine manufacturing equipment, and particularly to an automatic mold changer for a blow molding machine and a replacement method. Background Art

[0002] In the field of plastic bottle production, the rapid replacement and precise detection of blow molding machine molds are key links affecting production efficiency and product quality. Traditional blow molding machine mold replacement mainly relies on manual operation. Operators need to manually disassemble the old mold, transport the new mold, and adjust the positioning, which has problems such as time-consuming and laborious, low positioning accuracy, and easy mold damage. Especially in large-scale multi-batch production, when changing molds frequently, the efficiency bottleneck and human error of manual operation are more prominent, seriously restricting the flexible and intelligent upgrading of the production line.

[0003] In the prior art, some automated mold changing devices achieve the grasping and moving of molds through robotic arms or grasping mechanisms, but their functions are single, lacking the ability to detect the mold state in real time. For example, although some devices can complete the physical handling of molds, they cannot comprehensively evaluate parameters such as the cavity size, wear degree, or internal cracks of the mold before replacement, resulting in the need for manual re-inspection or debugging after mold replacement, and it is difficult to avoid production interruptions or increased scrap rates caused by mold abnormalities. In addition, traditional detection methods mostly rely on a single technology (such as contact measurement or optical scanning), and there are detection blind spots: optical scanning is difficult to capture internal structural defects of the mold, while contact probes are easily interfered by surface topography and have low detection efficiency.

[0004] In recent years, although there have been research attempts to combine multi-sensor technologies to improve mold detection accuracy, the following problems still exist in practical applications: (1) The detection device and the grasping mechanism are separated, and independent workstations are required to complete the detection, extending the replacement cycle; (2) The fusion algorithm for multi-source data (such as images and sound waves) is imperfect, resulting in large parameter comparison errors; (3) The automatic separation and recombination technology of modular molds is not mature, especially lacking a reliable solution for the precise alignment of complex cavity molds. These problems make the existing automated mold changing systems difficult to meet the production requirements of high precision and high rhythm.

[0005] Therefore, there is an urgent need to develop an automatic mold changer for a blow molding machine that integrates intelligent grasping, multi-dimensional detection, and data collaborative analysis to solve the core pain points such as low efficiency, incomplete detection, and lagging mold state evaluation of traditional methods, and promote the upgrading of blow molding production towards full automation and self-adaptation. Summary of the Invention

[0006] In order to solve the problems existing in the prior art, the present invention provides an automatic mold changer for a blow molding machine and a replacement method. Among them, an automatic mold changer for a blow molding machine includes:

[0007] The extraction mechanism is provided with a plurality of adjusting jaws, and the plurality of adjusting jaws grasp the blow molding machine on the extraction mechanism;

[0008] The detection mechanism is arranged on one side of the extraction mechanism. The adjusting jaws grasp the blow molding machine and place it on the detection mechanism, and the detection mechanism detects the parameters of the blow molding machine.

[0009] Optionally, in some embodiments of the present application, the extraction mechanism includes:

[0010] A rotating disk, on which a grasping component is arranged, and the adjusting jaws are arranged on the grasping component, and the adjusting jaws clamp the blow molding machine;

[0011] A rotating motor, the output end of which is connected to the rotating disk, so that the rotating motor drives the rotating disk to rotate.

[0012] Optionally, in some embodiments of the present application, the grasping component includes:

[0013] A fixed block, which is fixedly installed on the rotating disk, and a first sliding groove is formed on the fixed block, and the direction of the first sliding groove is set along the radius direction of the rotating disk;

[0014] A first sliding rod is arranged in the first sliding groove, and the first sliding rod slides in the first sliding groove, and the adjusting jaws are arranged at one end of the first sliding rod far from the rotating disk.

[0015] Optionally, in some embodiments of the present application, the detection mechanism includes:

[0016] A detection box, a detection cavity is formed in the detection box, and a rotating clamping mechanism is arranged in the detection cavity, and the rotating clamping mechanism clamps the blow molding machine and rotates the blow molding machine;

[0017] An acoustic wave scanning device is arranged in the detection cavity, and the output end of the acoustic wave scanning device is arranged in the direction towards the blow molding machine.

[0018] Optionally, in some embodiments of the present application, the blow molding machine includes a first module and a second module, and a forming cavity is formed at one side position of the first module facing the second module and at one side position of the second module facing the first module. It is characterized in that electric adsorption devices are arranged on both the adjusting jaws and the rotating clamping mechanism;

[0019] When the adjusting jaw places the blow molding machine on the rotating clamping mechanism, start the electric adsorption device. The adjusting jaw and the rotating clamping mechanism separate the blow molding machine, so that the blow molding machine is divided into the first module and the second module.

[0020] Optionally, in some embodiments of the present application, an optical scanning device is provided on the detection box. The optical scanning device is arranged corresponding to the position of the adjusting jaw. The optical scanning device includes:

[0021] Second sliding grooves. There are two second sliding grooves, and the two second sliding grooves are respectively arranged corresponding to both sides of the adjusting jaw. The two second sliding grooves are both vertically arranged;

[0022] Second sliding rods. The two ends of the second sliding rod are respectively connected to the second sliding grooves, and the second sliding rod moves up and down in the second sliding grooves;

[0023] An optical scanner is arranged on the second sliding rod. The optical scanner scans the molding cavities on the first module and the second module, and the optical scanner outputs image information according to the scanning results.

[0024] Optionally, in some embodiments of the present application, a replacement method includes:

[0025] Step 1: The extraction mechanism grabs the blow molding machine through the adjusting jaw, rotates the rotating disk, and docks the corresponding blow molding machine with the rotating clamping device;

[0026] Step 2: Start the electric adsorption device. The adjusting jaw and the rotating clamping device divide the blow molding machine into a first module and a second module. The first module is located outside the detection box, and the second module is located inside the detection cavity;

[0027] Step 3: Start the optical scanning device. The optical scanner scans the first module and the second module, and outputs image information through the scanning process;

[0028] Step 4: Transmit the image information to the control terminal. The control terminal preprocesses the image information, identifies the image information, and outputs the parameters of the first module and the parameters of the second module corresponding thereto;

[0029] Step 5: After image recognition, the adjustment gripper combines the first module with the second module. The first module and the second module are combined into a blow molding machine, and the rotating clamping mechanism is started. The rotating clamping mechanism drives the blow molding machine to rotate. When the blow molding machine rotates to a certain position, the acoustic wave scanning device performs acoustic wave scanning on the blow molding machine and outputs acoustic wave scanning information. The acoustic wave scanning information is transmitted to the control terminal, and the control terminal performs comparison processing based on the acoustic wave scanning information and the image information, and combines to generate the parameter information of the blow molding machine;

[0030] Step 6: The adjustment gripper grabs and replaces the blow molding machine according to the parameter information of the blow molding machine.

[0031] Optionally, in some embodiments of the present application, the preprocessing process includes:

[0032] Step 401: The control terminal performs binarization processing on the image information;

[0033] Step 402: Extract features from the binarized image information;

[0034] Step 403: Parameterize the image after feature extraction to generate the parameters of the first module and the second module, and the parameters include the structural dimension data of the cavity.

[0035] Optionally, in some embodiments of the present application, the frequency of the acoustic wave in the acoustic wave scanning device is 1 Hz - 20 Hz.

[0036] Optionally, in some embodiments of the present application, the replacement process is as follows:

[0037] The control terminal presets the parameter dimensions of a standard blow molding machine. When the output image information and the acoustic wave scanning information are the same as the preset parameter dimensions of the blow molding machine, the blow molding machine is retained. When the output image information and the acoustic wave scanning information are different from the preset parameter dimensions of the blow molding machine, the blow molding machine is replaced by the extraction mechanism.

[0038] Compared with the prior art, the beneficial effects in the present invention are:

[0039] 1. The automatic mold replacement of the blow molding machine in the present application realizes the full-process automation from grasping, disassembling, detecting to recombining and replacing the blow molding machine through the coordinated work of the extraction mechanism and the detection mechanism. The rotating disk and the adjustment gripper of the extraction mechanism can accurately grasp the blow molding machine and transport it accurately to the detection mechanism, avoiding the errors and delays that may be brought by manual operation, and greatly improving the efficiency of mold replacement.

[0040] 2. The inspection agency is equipped with a sonic scanning device and an optical scanning device, which can comprehensively inspect the blow molding machine from different angles. The sonic scanning device can perform an overall scan of the forming cavity inside the blow molding machine to obtain its structural characteristics and volume information; the optical scanning device performs an optical scan of the forming cavity by moving the second slide rod up and down and outputs detailed image information. These two inspection methods complement each other, improving the accuracy and reliability of the inspection. Brief Description of the Drawings

[0041] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0042] Figure 1 It is a schematic diagram of the overall structure of the automatic die changing device for the blow molding machine provided by the embodiment of the present application;

[0043] Figure 2 It is a schematic diagram of the overall structure of the extraction mechanism provided by the embodiment of the present application;

[0044] Figure 3 It is a schematic diagram of the overall structure of the rotating clamping mechanism provided by the embodiment of the present application;

[0045] Figure 4 It is a schematic diagram of the overall structure of the blow molding machine provided by the embodiment of the present application;

[0046] Figure 5 It is a schematic diagram of the overall process of the replacement method provided by the embodiment of the present application.

[0047] Explanation of the Reference Numerals in the Drawings:

[0048] 100, extraction mechanism; 110, rotating disk; 120, adjusting jaw; 130, grasping component; 131, fixed block; 132, first chute; 133, first slide rod; 140, rotating motor; 200, inspection agency; 210, inspection box; 211, inspection cavity; 220, rotating clamping mechanism; 221, fixed claw; 230, sonic scanning device; 240, optical scanning device; 241, second chute; 242, second slide rod; 243, optical scanner; 300, blow molding machine; 310, first module; 320, second module; 330, forming cavity; 400, electric adsorption device. Detailed Embodiments

[0049] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present application. It can be understood that the accompanying drawings are only for reference and illustration, and are not used to limit the present application. The connection relationships shown in the drawings are only for clear description and do not limit the connection methods.

[0050] Specifically, as Figures 1-4 shown, an automatic mold changing device for a blow molding machine 300 is provided in an embodiment of the present application. The mold body includes an extraction mechanism 100 and a detection mechanism 200. The extraction mechanism 100 can perform an extraction movement on the blow molding machine 300, facilitating the transfer of the blow molding machine 300 to the detection mechanism 200. Among them, the extraction mechanism 100 mainly includes a rotating disk 110 and a rotating motor 140. The output end of the rotating motor 140 is connected to the rotating disk 110, enabling the rotating motor 140 to drive the rotating disk 110 to rotate. A grasping assembly 130 is provided on the rotating disk 110, and an adjusting jaw 120 is installed on the grasping assembly 130. To facilitate the adjusting jaw 120 to clamp the blow molding machine 300, the grasping assembly 130 mainly includes a fixing block 131 and a first sliding rod 133. The fixing block 131 is fixedly installed on the rotating disk 110, and in the embodiment of the present application, the number of fixing blocks 131 is set to four. The four fixing blocks 131 are evenly arranged at the four peripheral edge positions of the rotating disk 110. A first sliding groove 132 is formed on the side of the fixing block 131 away from the rotating disk 110. The direction of the first sliding groove 132 is set along the radial direction of the rotating disk 110. The first sliding rod 133 is arranged in the first sliding groove 132, enabling the first sliding rod 133 to move along the radial direction of the rotating disk 110 in the first sliding groove 132. An adjusting jaw 120 is provided at the end of the first sliding rod 133 away from the rotating disk 110. The adjusting jaw 120 can clamp the blow molding machine 300 to facilitate the transportation of the blow molding machine 300.

[0051] In the above, a fixing groove is provided on the rotating disk 110 corresponding to the position of the fixing block 131. The shape of the fixing groove corresponds to the shape of the fixing block 131, enabling the fixing block 131 to be engaged in the fixing groove.

[0052] And in the embodiment of the present application, the fixing block 131 can be detachably arranged in the fixing groove, enabling the convenient replacement of the first sliding rod 133.

[0053] Preferably, in the embodiment of the present application, the adjustment between the fixed block 131 and the first slide rod 133 is electrically driven, which facilitates the movement of the first slide rod 133 within the first chute 132.

[0054] In the embodiment of the present application, the adjusting jaw 120 is arranged at one end of the first slide rod 133. The adjusting jaw 120 includes a first clamping piece and a second clamping piece. The first clamping piece and the second clamping piece enclose a semi-circular structure, and the radius of the semi-circular structure is the same as the radius of the blow molding machine 300, so that the adjusting jaw 120 can effectively clamp the blow molding machine 300. A rotating motor is arranged at the position of the adjusting jaw 120, and the rotating motor drives the first clamping piece and the second clamping piece to move.

[0055] As described above, the blow molding machine 300 mainly includes a first module 310 and a second module 320. The first module 310 and the second module 320 are combined to form a blow molding machine 300. Among them, a molding cavity 330 is arranged on the side of the first module 310 facing the second module 320. Similarly, a molding cavity 330 is arranged on the side of the second module 320 facing the first module 310. When the first module 310 and the second module 320 are combined into a blow molding machine 300, the material can be blow molded into a bottle in the combined molding cavity 330.

[0056] Among them, in the embodiment of the present application, the detection mechanism 200 mainly includes a detection box 210. A detection cavity 211 is opened in the detection box 210, and the detection cavity 211 is used to accommodate the blow molding machine 300. A rotating clamping mechanism 220 is arranged in the detection cavity 211, and the rotating clamping mechanism 220 clamps and rotates the blow molding machine 300 in the detection cavity 211, so that the blow molding machine 300 rotates in the detection cavity 211.

[0057] An acoustic wave scanning device 230 is arranged on the inner wall of the detection cavity 211. The acoustic wave scanning device 230 is vertically installed on the inner wall of the detection cavity 211, and the output end of the acoustic wave scanning device 230 is arranged in the direction facing the blow molding machine 300, so that the acoustic wave scanning device 230 scans the whole blow molding machine 300 to scan out the structural characteristics of the molding cavity 330 in the blow molding machine 300.

[0058] Specifically:

[0059] In an embodiment of the present application, when detecting the structure of the blow molding machine 300, the blow molding machine 300 needs to be disassembled into a first module 310 and a second module 320. During the disassembly process, the blow molding machine 300 is separated by adjusting the clamping jaws 120 and the rotating clamping mechanism 220. A fixed jaw 221 is provided on the rotating clamping mechanism 220. Similar to the adjusting clamping jaws 120, the fixed jaw 221 clamps the blow molding machine 300. Both the fixed jaw 221 and the adjusting clamping jaws 120 are provided with an electric adsorption device 400. The electric adsorption device 400 can adsorb the first module 310 and the second module 320, causing the first module 310 and the second module 320 to separate, presenting the molding cavity 330.

[0060] In an embodiment of the present application, an optical scanning device 240 is provided on the detection box 210. The optical scanning device 240 mainly includes a second chute 241, a second sliding rod 242, and an optical scanner 243.

[0061] Among them, there are two second chutes 241, which are respectively arranged on both sides of the adjusting clamping jaws 120. A second sliding rod 242 is arranged between the two second chutes 241. Both ends of the second sliding rod 242 are located within the second chute 241, enabling the second sliding rod 242 to move within the second chute 241. At the same time, in the present application, the second chute 241 is vertically arranged, enabling the second sliding rod 242 to move vertically. An optical scanner 243 is installed on the second sliding rod 242. The optical scanner 243 optically scans the molding cavity 330 through the up and down movement of the second sliding rod 242, and outputs image information according to the scanning results.

[0062] After the scanning is completed, through the clamping of the adjusting clamping jaws 120 and the release of the electric adsorption device 400, the first module 310 and the second module 320 are combined into a blow molding machine 300.

[0063] After being combined into a blow molding machine 300, the rotating clamping mechanism 220 is started. The rotating clamping mechanism 220 drives the blow molding machine 300 to rotate within the detection cavity 211. The rotating blow molding machine 300 will pass through the acoustic scanning device 230 for acoustic scanning. The acoustic wave will scan the size structure of the molding cavity 330 in the blow molding machine 300 and the corresponding volume, enabling the structural scanning record of each blow molding machine 300 and corresponding output of scanning information.

[0064] Based on the above structure, an embodiment of the present application provides a replacement method. The replacement method mainly includes the following steps:

[0065] Step 1: The extraction mechanism 100 grabs the blow molding machine 300 through the adjusting jaw 120, rotates the rotating disk 110, and docks the corresponding blow molding machine 300 with the rotating clamping device;

[0066] Step 2: Start the electric adsorption device 400. The adjusting jaw 120 and the rotating clamping device divide the blow molding machine 300 into a first module 310 and a second module 320. The first module 310 is located outside the detection box 210, and the second module 320 is located inside the detection cavity 211;

[0067] Step 3: Start the optical scanning device 240. The optical scanner 243 scans the first module 310 and the second module 320, and outputs image information through the scanning process;

[0068] Step 4: The image information is transmitted to the control terminal. The control terminal preprocesses the image information, identifies the image information, and outputs the parameters of the corresponding first module 310 and the parameters of the second module 320;

[0069] Step 5: After image recognition, the adjusting jaw 120 combines the first module 310 and the second module 320. The first module 310 and the second module 320 are combined into the blow molding machine 300, and the rotating clamping mechanism 220 is started. The rotating clamping mechanism 220 drives the blow molding machine 300 to rotate. When the blow molding machine 300 rotates to a certain position, the acoustic wave scanning device 230 performs acoustic wave scanning on the blow molding machine 300 and outputs acoustic wave scanning information. The acoustic wave scanning information is transmitted to the control terminal. The control terminal performs comparison processing based on the acoustic wave scanning information and the image information, and combines to generate the parameter information of the blow molding machine 300;

[0070] Step 6: The adjusting jaw 120 grabs and replaces the blow molding machine 300 according to the parameter information of the blow molding machine 300.

[0071] In the process of the above step 4, the image processing process mainly includes the following sub-steps: First, the control terminal performs binary processing on the image information. This binary image processing can perform black and white processing on the image, which is convenient for forming the corresponding image contour and facilitating the feature recognition of the image. After the binary processing, feature extraction is performed on the binary image information, and the image after feature extraction is parameterized to generate the parameters of the corresponding first module 310 and the parameters of the second module 320. Among them, the parameters of the first module 310 and the parameters of the second module 320 include the structural dimension data of the cavity. This data is compared with the data information of the blow molding machine 300 pre-stored in the control terminal to determine which type of blow molding machine 300 this blow molding machine 300 belongs to.

[0072] Meanwhile, to avoid misjudgment in the image processing, when the blow molding machine 300 rotates in the rotating clamping mechanism 220, the acoustic wave scanning device 230 will perform acoustic wave scanning on the blow molding machine 300, and the acoustic wave frequency of this scanning is 1 Hz - 20 Hz.

[0073] Subsequently, a comprehensive judgment is made based on the information of the acoustic wave scanning and the information of the image processing to replace the blow molding machine 300. The process of this replacement is as follows:

[0074] The control terminal presets the parameter dimensions of the standard blow molding machine 300. When the output image information and the acoustic wave scanning information are the same as the preset parameter dimensions of the blow molding machine 300, the blow molding machine 300 is retained. When the output image information and the acoustic wave scanning information are different from the preset parameter dimensions of the blow molding machine 300, the blow molding machine 300 is replaced by the extraction mechanism 100.

[0075] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical method of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A bottle blowing machine with automatic mold replacement, characterized in that: include: An extraction mechanism is provided with a plurality of adjustment jaws, and the plurality of adjustment jaws are used to grab the bottle blowing machine on the extraction mechanism; The detection mechanism is arranged at one side of the extraction mechanism. The adjusting clamp grabs the bottle blowing machine and places it on the detection mechanism. The detection mechanism performs parameter detection on the bottle blowing machine.

2. The automatic mold replacement of a bottle blowing machine according to claim 1, characterized in that: The extraction mechanism includes: A rotating disk, on which a grab assembly is disposed, on which the adjusting jaw is disposed, and the adjusting jaw clamps the bottle blowing machine; A rotating motor, wherein an output end of the rotating motor is connected to the rotating disk, so that the rotating motor drives the rotating disk to rotate.

3. The automatic mold replacement of a bottle blowing machine according to claim 2, characterized in that: The grabbing component includes: A fixed block, the fixed block is fixedly mounted on the rotating disk, the fixed block is provided with a first slide groove, and the direction of the first slide groove is arranged along the radius of the rotating disk; The first sliding rod is arranged in the first sliding groove. The first sliding rod slides in the first sliding groove. The adjusting clamp is arranged at one end of the first sliding rod away from the rotating disk.

4. The automatic mold replacement of a bottle blowing machine according to claim 1, characterized in that: The detection mechanism includes: A detection box, wherein a detection cavity is provided in the detection box, and a rotating clamping mechanism is provided in the detection cavity, and the rotating clamping mechanism clamps the bottle blowing machine and rotates the bottle blowing machine; The sonic scanning device is arranged in the detection cavity, and the output end of the sonic scanning device is arranged in the direction of the bottle blowing machine.

5. The automatic mold replacement of a bottle blowing machine according to claim 4, the bottle blowing machine comprises a first module and a second module, a molding cavity is formed at a side position of the first module in a direction toward the second module and a side position of the second module in a direction toward the first module, characterized in that: The adjusting jaws and the rotating clamping mechanism are both provided with electric adsorption devices; When the adjusting jaw places the bottle blowing machine on the rotating clamping mechanism, the electric adsorption device is started, and the adjusting jaw and the rotating clamping mechanism separate the bottle blowing machine, so that the bottle blowing machine is divided into the first module and the second module.

6. The automatic mold replacement of a bottle blowing machine according to claim 5, characterized in that: The detection box is provided with an optical scanning device, which is arranged corresponding to the position of the adjusting jaws, and the optical scanning device includes: A second slide groove, wherein two second slide grooves are provided, and the two second slide grooves are respectively provided corresponding to the positions on both sides of the adjusting clamping jaw, and the two second slide grooves are both provided vertically; a second sliding rod, wherein both ends of the second sliding rod are respectively connected to the second sliding groove, and the second sliding rod moves up and down in the second sliding groove; An optical scanner is arranged on the second slide rod, and the optical scanner scans the molding cavities on the first module and the second module, and the optical scanner outputs image information according to the scanning results.

7. A replacement method, performed by automatically replacing the mold of a bottle blowing machine according to any one of claims 1 to 6, characterized in that: The automatic replacement method of the bottle blowing machine comprises: Step 1: The extraction mechanism grabs the bottle blowing machine by adjusting the clamping claws, and rotates the rotating disk to dock the corresponding bottle blowing machine with the rotating clamping device; Step 2: Start the electric adsorption device, the adjusting jaws and the rotating clamping device divide the bottle blowing machine into a first module and a second module, the first module is located outside the detection box, and the second module is located in the detection chamber; Step 3: starting the optical scanning device, the optical scanner scans the first module and the second module, and outputs image information through the scanning process; Step 4: The image information is transmitted to the control terminal, and the control terminal performs preprocessing according to the image information, identifies the image information, and outputs corresponding parameters of the first module and the second module; Step 5: After image recognition, the adjusting clamp combines the first module with the second module, the first module and the second module are combined into a bottle blowing machine, and the rotating clamping mechanism is started, the rotating clamping mechanism drives the bottle blowing machine to rotate, when the bottle blowing machine rotates to a position, the acoustic wave scanning device performs an acoustic wave scanning on the bottle blowing machine and outputs acoustic wave scanning information, the acoustic wave scanning information is transmitted to the control terminal, the control terminal compares and processes the acoustic wave scanning information and the image information, and generates parameter information of the bottle blowing machine in combination; Step six: the adjusting jaws grasp and replace the bottle blowing machine according to the parameter information of the bottle blowing machine.

8. A replacement method according to claim 7, characterized in that: In the step 4, the pre-processing process includes: Step 401: the control terminal performs binarization processing on the image information; Step 402: extracting features from the binary image information; Step 403: parameterizing the feature-extracted image to generate corresponding parameters of the first module and the second module, wherein the parameters include structural dimension data of the cavity.

9. A replacement method according to claim 7, characterized in that: In the step five, the frequency of the sound waves in the sound wave scanning device is 1 Hz-20 Hz.

10. A replacement method according to claim 7, characterized in that: The replacement process is as follows: The control terminal is preset with standard parameter sizes of the blow molding machine. When the output image information and the ultrasonic scanning information are the same as the preset parameter sizes of the blow molding machine, the blow molding machine is retained. When the output image information and the ultrasonic scanning information are different from the preset parameter sizes of the blow molding machine, the blow molding machine is replaced by the extraction mechanism.

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