Method for detecting the outer diameter of a deformable plastic product

Abstract

The present application relates to the outer diameter detection method of the easily deformed plastic product, and the detection comprises the following steps: S1, the pre-adjustment process of measurement; S2, the measurement process. The present application not only greatly improves the coincidence rate of the center of the detection and the center of the plastic product, but also the force applied to the circumferential sleeve of the plastic product is centripetal force, that is, the probability of causing the plastic product to produce deformation is significantly reduced, thereby greatly improving the detection accuracy and being convenient to operate. At the same time, under the premise that the probability of causing the plastic product to produce deformation is small, not only can the detection of the outer diameter larger than the design outer diameter of the easily deformed plastic product be carried out, but also the quick verification of the fixed outer diameter product can be quickly carried out to increase the accuracy of the measured product size parameter.

Description

Technical Field

[0001] The invention belongs to the field of measurement technology, and in particular relates to a method for detecting the outer diameter of a deformable plastic product. Background Art

[0002] Currently, plastic products are generally injection molded, and the outer diameter of the molded products needs to be measured to prevent substandard products from entering the market. For example, to obtain dimensional information about the rim of a conventional plastic cup, a conventional caliper is used to measure the outer diameter. Specifically, the two main calipers are placed against opposite sides of the rim, and the distance between the two main calipers is used to determine the rim size. Although this method is feasible, it suffers from significant measurement errors, primarily because the object being tested is easily deformed. Consequently, it fails to achieve the following two goals:

[0003] 1) The resistance force formed by the engagement contact position is difficult to control, which can easily cause contact deformation and detection errors;

[0004] 2) Once the size to be detected is large, it is difficult for ordinary calipers to clamp it, and the center of the detection formed will not coincide with the center of the detection object. Therefore, the distance information obtained will not coincide with the actual diameter, resulting in detection errors.

[0005] In addition, as for the inspection tools used, general calipers have the function of actual measurement or dimensional verification. However, when combined with easily deformable plastic products, it is also very difficult to operate. Not only is the efficiency low, but there are also large errors. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a new method for detecting the outer diameter of easily deformable plastic products.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A method for detecting the outer diameter of a deformable plastic product, wherein the outer diameter measuring device used comprises a base, a measuring standard, and a measuring tool, wherein the base is formed with a sample slot, an assembly slot, and an exit slot, the outer diameter of the measuring standard is less than or equal to the designed outer diameter of the product to be measured, the measuring tool comprises a flexible lasso forming an annular detection area in the sample slot and having two ends extending into the assembly slot after passing through the exit slot, a reel and a winding module vertically pivotally mounted in the assembly slot and capable of reeling the flexible lasso from the ends, and a measuring instrument that movably contacts the reel or the winding module to obtain the amount of expansion and contraction formed by tightening the flexible lasso portion in the annular detection area and wrapping around the periphery of the product to be measured, and the detection comprises the following steps:

[0009] S1. Debugging process before measurement

[0010] First, a measurement standard is prepared with an outer diameter equal to the designed outer diameter of the product to be measured. The measurement standard is then placed in a sample slot and positioned within the annular detection area formed by the flexible lasso. The reel or winding module is then rotated to tighten the annular detection area inward, so that the flexible lasso is partially tightened around the periphery of the product to be measured, and a corresponding expansion and contraction is generated on the measuring instrument. This expansion and contraction is then reset to zero so that the reading is displayed as zero.

[0011] S2. Measurement process

[0012] The reel or winding module rotates in the reverse direction to loosen the flexible lasso and separate it from the outer periphery of the measurement standard. At this time, the measurement standard is removed, and the product to be measured is placed in the corresponding annular detection area. In the inwardly tightened annular detection area of ​​the flexible lasso, the flexible lasso is gradually wrapped around the outer periphery of the product to be measured, and the detection center line formed by the flexible lasso coincides with the center line of the part to be detected of the product to be measured. At the same time, the measuring instrument displays the corresponding expansion and contraction amount, where the expansion and contraction amount is ∆L. If ∆L=0, the outer diameter of the measurement standard, the designed outer diameter of the product to be measured, and the measured outer diameter of the product to be measured are equal. If ∆L>0, the measured outer diameter of the product to be measured = the outer diameter of the measurement standard + ∆L.

[0013] Preferably, the tension generated by the reel and winding module is directed in opposite directions along the tangent line of the annular detection zone, thereby driving the annular detection zone to tighten inward or expand outward. The angle formed by the two tensions is 150-180°. Preferably, the tightening and loosening effects achieved by an angle of 170-180° are more effective. Moreover, when the angle is 180°, the relative pulling force prevents the annular detection zone from twisting vertically. This facilitates the alignment of the detection centerline formed by the flexible lasso during the inward tightening of the annular detection zone with the centerline of the portion of the product to be measured, further improving the accuracy of the detection results.

[0014] According to a specific embodiment and preferred aspect of the present invention, the flexible lasso is a flexible metal strip, and includes a partially crossed and pierced portion to form a loop portion and a winding portion, wherein the two winding ends of the winding portion are respectively wrapped around the circumference of the reel and the winding module and installed on the reel and the winding module.

[0015] In some specific embodiments, the flexible metal strip is formed with a through-hole extending along its own length direction on one of the cross parts, and the other cross part forms an insertion portion matching the through-hole, and the insertion portion passes through the through-hole. The top and bottom surfaces of the loop portion and the winding portion are respectively flush, and the bottom surface is horizontally attached to the bottom surfaces of the sample slot, the assembly slot and the outlet slot.

[0016] According to another specific embodiment and preferred aspect of the present invention, the assembly groove includes a first groove body and a second groove body that are relatively separated, wherein the reel is installed in the first groove body through a rotating connecting piece, and the winding part is inserted from the end and wound around the outer periphery of the reel; the winding module is installed in the second groove body, and the winding part is inserted from the other end and wound around the outer periphery of the winding module.

[0017] Preferably, the measuring tool also includes a first debugging component, wherein the first debugging component includes an adjusting slider that can be movably extended into the first groove body from one side of the base, and a knob connected to the adjusting slider and extending from the corresponding side of the base, wherein the screwing in or loosening of the knob drives the adjusting slider to move inward or outward synchronously, and makes the reel and the winding part relatively tightened or loosened.

[0018] The winding module is projected into a fan shape from top to bottom. The second slot body includes a fan-shaped slot that matches the winding module, and a bottom slot that is connected to the fan-shaped slot and is used to install a tension spring. The winding module is rotated from the center of the fan and installed in the fan-shaped slot. The two ends of the tension spring are respectively connected between the base and the winding module.

[0019] According to another specific implementation and preferred aspect of the present invention, in S1 and S2, the reel position remains fixed after adjustment, and the rotation of the winding module drives the annular detection area to tighten inward or open outward. Under this layout, it is more conducive to the installation of the detector, and the required telescopic amount can also be obtained. In some specific embodiments, the measuring instrument includes a pull-rod type electronic ruler installed on a fixed seat, a stop bar connected to the winding module for synchronous movement, and a tension spring that pulls the winding module inward to tighten the ring part, wherein the pull rod of the pull-rod type electronic ruler contacts the stop bar, and the stop bar moves synchronously with the winding module, and the pull rod and the stop bar movably contact each other to change the telescopic amount.

[0020] Furthermore, the width of the exit slot is greater than or equal to the thickness of the flexible lasso, and the sample slot and assembly slot are located on opposite sides of the exit slot, with the exit slot being tangential to the sample slot and the reel, respectively. This layout design allows for stable inward and outward movement of the loop portion.

[0021] Due to the implementation of the above technical solution, the present invention has the following advantages compared with the prior art:

[0022] In the existing measurement of the outer diameter of plastic products, it is impossible to avoid the deformation of the product caused by the friction formed by the snap contact, and it is impossible to improve the coincidence rate between the center of the detection and the center of the detection object, resulting in high error rate of the detection result and inconvenient operation. The defects cannot be overcome. The present invention operates the end of the winding part to implement the inward retraction of the ring part. First, the position calibration of the set expansion and contraction amount is performed by measuring the standard part. Then, the measuring standard part is removed and the circumference of the plastic product is tightened by the ring part. Then, the difference between the expansion and contraction amount measured by the measuring instrument and the set contraction amount is added to the outer diameter of the measuring standard part. The data obtained is In order to measure the outer diameter of the plastic product, the present invention not only greatly improves the coincidence rate between the detection center and the center of the plastic product, but also the force applied to the circumferential sleeve of the plastic product is centripetal force, that is, the probability of causing deformation of the plastic product is significantly reduced, thereby greatly improving the detection accuracy and facilitating operation. At the same time, under the premise that the probability of causing deformation of the plastic product is small, the present invention can not only detect the outer diameter of the plastic product that is larger than the designed outer diameter of the deformable plastic product, but also quickly verify the product with a fixed outer diameter, so as to increase the accuracy of the measured product size parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the structure of the outer diameter measuring device of a plastic product of the present invention (loose state);

[0024] Figure 2 for Figure 1 Schematic diagram of the structural decomposition;

[0025] Figure 3 for Figure 1 Schematic top view of

[0026] Figure 4 for Figure 3 AA-direction cross-sectional view;

[0027] Figure 5 This is a schematic diagram of the reel structure of the device for measuring the outer diameter of a plastic product of the present invention;

[0028] Figure 6 for Figure 5 BB-direction cross-sectional view;

[0029] Figure 7 Schematic diagram of the lasso structure of the device for measuring the outer diameter of a plastic product of the present invention;

[0030] Figure 8 Schematic diagram of the structure of the outer diameter measuring device of a plastic product of the present invention (tightened state);

[0031] Figure 9 Schematic diagram of the structure of the outer diameter measuring device of a plastic product of the present invention (when measuring diameter);

[0032] Wherein: 1, base; 10, sample slot; 111, first slot body; 112, second slot body; c1, fan-shaped slot; c2, bottom slot; 12, outlet slot;

[0033] 2. Measuring standard parts;

[0034] 3. Measuring tool; 30. Lasso; 300. Loop; 301. Winding unit; q1. Perforation; q2. Insertion unit; 31. Reel; 310. Finger slot; 32. Winding module; 33. First adjustment component; 330. Adjustment slider; 331. Knob; 34. Second adjustment component; 340. Pull-rod electronic ruler; g. Pull rod; 341. Stop bar; 342. Tension spring;

[0035] B. Plastic cup. DETAILED DESCRIPTION

[0036] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0039] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two elements, or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0040] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher horizontal height than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower horizontal height than the second feature. It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can be an intermediate element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there can be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0041] like Figures 1 to 9 As shown, the outer diameter detection method of the deformable plastic product of this embodiment uses an outer diameter measuring device for plastic products, which is particularly suitable for detecting the outer diameter of plastic cups or plastic cup lids. This embodiment takes plastic cup B as an example, and the outer diameter measuring device includes a base 1, a measuring standard part 2, and a measuring tool 3.

[0042] Specifically, the base 1 has a sample slot 10 and an assembly slot, wherein the sample slot 10 is used to place the plastic product to be measured (such as: plastic cup B); the assembly slot is used to install the measuring tool 3.

[0043] The outer contour of the measurement standard 2 along the vertical axis is similar to the outer contour of the plastic product to be measured along the vertical axis, and the outer diameter formed by this outer contour is less than or equal to the design outer diameter of the plastic product to be measured. In some embodiments, the design outer diameter of the plastic product to be measured is R2, and the outer diameter of the measurement standard is R1, where R1 is 0.9 to 1.0 times R2. In this example, the design outer diameter of the plastic product to be measured is very close to the outer diameter of the measurement standard.

[0044] Recombination Figure 2 and Figure 5 As shown, the measuring tool 3 includes a lasso 30 that is partially crossed and intersected to form a loop portion 300 and a winding portion 301, a reel 31 and a winding module 32, which are respectively connected to the assembly slot by vertical pivots, a first adjustment member 33 and a second adjustment member 34, wherein the lasso 30 is a whole flexible metal strip, and a section of the cross portion is penetrated from the middle to form a through hole q1, and another section of the cross portion is notched from the upper and lower sides to form an insertion portion q2, which extends out of the through hole, and the extension and retraction of the insertion portion q2 synchronously tighten or loosen the loop inward. The part 300, the ring part 300 and the winding part 301 are aligned in the upper and lower directions, and the two winding ends of the winding part 301 are respectively wound around the reel 31 and the winding module 32 and installed on the reel 31 and the winding module 32. When the reel 31 and / or the winding module 32 rotates, the ring part 300 is retracted inward or opened outward accordingly. The first adjusting part 33 limits the length of the rope 30 wound around the reel 31 through loose and tight interference. The second adjusting part 34 is a measuring instrument for obtaining the expansion and contraction amount formed by tightening the ring part 300 around the periphery of the plastic product to be measured by interfering with the winding module 32.

[0045] In some specific embodiments, the assembly groove includes a first groove body 111 and a second groove body 112 that are relatively separated, wherein a fixed seat is provided in the first groove body 111, and the reel 31 is rotatably installed on the circumference of the fixed seat and is located in the first groove body 111, and the reel 31 has a plurality of finger slot holes 310 evenly distributed around the circumference, and the winding portion 301 is inserted from the end and wound around the outer periphery of the reel 31; the winding module 32 is installed in the second groove body 112, and the winding portion 301 is inserted from the other end and wound around the outer periphery of the winding module 32, wherein the winding module 32 is projected into a fan shape from top to bottom, and the winding module 32 is rotatably installed from the center of the fan shape in the second groove body 112. The first adjustment member 33 includes an adjustment slider 330 that can be movably extended from one side of the base into the first slot 111, and a knob 331 connected to the adjustment slider 330 and extending from the corresponding side of the base 1. The knob 331 is screwed in or out to drive the adjustment slider 330 to move inward or outward synchronously, thereby tightening or loosening the reel 31 and the winding portion 301 relative to each other. The measuring instrument includes a pull-rod electronic ruler 340 mounted on a fixed base, a stop bar 341 that is connected to the winding module 32 for synchronous movement, and a tension spring 342 that pulls the winding module 32 inward to tighten the collar portion 300. The pull rod g of the pull-rod electronic ruler 340 contacts the stop bar 341, and the stop bar 341 moves synchronously with the winding module 32. The pull rod g and the stop bar 341 flexibly contact each other to change the amount of expansion and contraction.

[0046] Furthermore, to facilitate assembly, the second trough 112 includes a fan-shaped slot c1 that mates with the winding module 32, and a bottom slot c2 that communicates with the fan-shaped slot c1 and is used to mount a tension spring 342. The winding module 32 is installed within the fan-shaped slot by rotating about the center of the fan-shaped circle. The ends of the tension spring 342 are respectively connected between the base 1 and the winding module 32. A stop bar 341 is mounted above the pivot connected to the winding module 32 and is fixed relative to the winding module 32. The pull rod g intersects with the stop bar 341 and contacts the stop bar 341 as it expands and contracts along its length.

[0047] Furthermore, the tension generated by the reel 31 and winding module 32 is directed in opposite directions along the tangent line of the annular detection zone, driving the annular detection zone to tighten inward or expand outward. The angle formed by the two tensions is 150-180°. Specifically, the tightening and loosening effects achieved at 170-180° are more effective. Moreover, when at 180°, the relative pulling at this angle prevents the annular detection zone from twisting vertically. This facilitates the alignment of the detection centerline formed by the flexible lasso during the inward tightening of the annular detection zone with the centerline of the portion to be tested of the product to be measured, further improving the accuracy of the test results. At the same time, once the reel 31 is stationary, the rotation of the winding module 32 drives the annular detection zone to tighten inward or expand outward.

[0048] The width of the slot 12 is equal to the thickness of the flexible metal strip, and the sample slot 10 and the assembly slot are located on opposite sides of the slot 12, wherein the slot 12 is tangent to the sample slot 10 and the reel 31. This layout design can stably implement the inward and outward expansion of the collar portion.

[0049] In summary, the implementation process of this embodiment is as follows (with Figure 9 Take a medium cup as an example):

[0050] First, when it is necessary to measure the diameter of a cup (assuming the cup is designed to have a diameter of φ80), a measurement standard 2 with a diameter of φ80 must be made first. Then, the measurement standard 2 is placed in the sample slot 10 on the left side of the base 1 and placed in the collar portion 300 formed by the flexible metal strip 30. Secondly, the knob 331 is rotated counterclockwise so that the adjustment slider 330 no longer presses the reel 31. At this time, the reel 31 is rotated clockwise, driving the collar portion 300 of the flexible metal strip 30 to retract inward. Tighten, the flexible metal strip 30 will drive the fan-shaped winding module 32 to rotate clockwise while tightening, until the stop bar 341 on the winding module 32 is aligned with the reference line on the base 1, and then stop rotating. At this time, the collar portion 300 of the flexible metal strip 30 is mounted on the periphery of the measuring standard 2 from the center, and the pull rod g on the pull rod type electronic ruler 340 has a downward force in the default state so that it can always be close to the stop bar 341. Then, rotate the knob 331 clockwise again, and the knob 331 is screwed inward. The adjusting slider 330 is pressed against the reel 31 and one end of the winding part 301. At the same time, the pull rod type electronic ruler 340 is opened at the extension amount corresponding to the pull rod g, so that the reading is displayed as 0.00. Finally, the winding module 32 is rotated to retract the other end of the winding part 301 into the first slot 111 to release the measurement standard 2. Then the measurement standard 2 is taken out. At this time, the winding module 32 is reset under the rightward pulling force of the tension spring 342. Then, the cup to be measured is turned upside down. At the same time, rotate the winding module 32 clockwise to make the loop portion 300 of the flexible metal strip 30 relatively loose and lengthen its circumference. Place the cup with the rim facing downward into the loop portion 300 of the flexible metal strip 30. Release your hand. The winding module 32 tightens the loop portion 300 of the flexible metal strip 30 under the action of the tension spring 342 and puts it around the rim of the cup. At the same time, read the data on the pull-rod electronic ruler 340 and add the data to the diameter of the measurement standard 2 to obtain the actual caliber of the cup.

[0051] At the same time, it should be noted that since there is an action in which a reading is displayed as 0.00, the data finally read on the pull-rod type electronic ruler 340 is the difference between the actual extension and contraction amount measured by the measuring instrument and the set contraction amount (that is, ∆L).

[0052] In summary, the present invention operates the end of the winding part to implement the retraction of the ring part. First, the position calibration of the set expansion and contraction amount is performed through the measuring standard part. Then, the measuring standard part is removed and the circumference of the plastic product is tightened by the ring part. Then, the difference between the expansion and contraction amount measured by the measuring instrument and the set contraction amount is added to the outer diameter of the measuring standard part. The data obtained is the actual measured outer diameter of the plastic product. Therefore, on the one hand, the present invention not only greatly improves the coincidence rate between the detection center and the center of the plastic product, but also the force applied to the circumferential sleeve of the plastic product is centripetal force, that is, the probability of causing deformation of the plastic product is significantly reduced, thereby greatly improving the detection accuracy. Accuracy and easy operation; on the other hand, the lasso is a flexible metal strip, which not only facilitates the tightening and loosening of the loop part, but also avoids twisting in the upper and lower directions during the tightening or loosening process, that is, the upper and lower parts are kept parallel for tightening or loosening. In other words, the center line of the loop part is kept completely aligned with the center line of the plastic product to be measured, thereby improving the detection accuracy; in addition, under the premise of a low probability of causing deformation of the plastic product, not only can the outer diameter of the plastic product that is easy to deform be detected to be larger than the designed outer diameter, but also the fixed outer diameter product can be quickly verified to increase the accuracy of the measured product size parameters.

[0053] The above detailed description of the present invention is intended to enable persons familiar with the art to understand the contents of the present invention and implement them. It does not limit the scope of protection of the present invention. Any equivalent changes or modifications made based on the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for detecting the outer diameter of a deformable plastic product, characterized in that: The outer diameter measuring device used includes a base, a measuring standard, and a measuring tool. The base is formed with a sample slot, an assembly slot, and a pass-through slot. The outer diameter of the measuring standard is less than or equal to the designed outer diameter of the product to be measured. The measuring tool includes a flexible lasso forming an annular detection area in the sample slot and extending into the assembly slot at both ends after passing through the pass-through slot, a reel and a winding module vertically pivoted in the assembly slot and capable of reeling the flexible lasso from the ends, and a measuring instrument that movably contacts the reel or the winding module to obtain the expansion and contraction amount formed by tightening the flexible lasso portion in the annular detection area and wrapping around the periphery of the product to be measured. The measuring instrument includes the following steps: S1. Debugging process before measurement First, a measurement standard with an outer diameter equal to the designed outer diameter of the product to be measured is prepared. The measurement standard is then placed in a sample slot and positioned within the annular test area formed by the flexible lasso. The reel or winding module is then rotated to tighten the annular test area inward, causing the flexible lasso to partially tighten around the periphery of the measurement standard, and a corresponding expansion and contraction is generated on the measuring instrument. This expansion and contraction is then reset to zero so that the reading is displayed as zero. S2. Measurement process The reel or winding module rotates in the opposite direction to loosen the flexible lasso and separate it from the outer periphery of the measurement standard. At this time, the measurement standard is removed, and the product to be measured is placed in the corresponding annular detection area. In the inward tightening annular detection area of ​​the flexible lasso, the flexible lasso is gradually wrapped around the outer periphery of the product to be measured, and the detection center line formed by the flexible lasso coincides with the center line of the part to be detected of the product to be measured. At the same time, the measuring instrument displays the corresponding expansion and contraction amount, where the expansion and contraction amount is ∆L. If ∆L=0, the outer diameter of the measurement standard, the design outer diameter of the product to be measured, and the measured outer diameter of the product to be measured are equal. If ∆L>0, the measured outer diameter of the product to be measured = the outer diameter of the measurement standard + ∆L.

2. The outer diameter detection method of a deformable plastic product according to claim 1, characterized in that: The tensions generated by the reel and the winding module are respectively along the tangent direction of the annular detection area and in opposite directions to drive the annular detection area to tighten inward or open outward, wherein the angle formed by the two tensions is 150-180°.

3. The outer diameter detection method of a deformable plastic product according to claim 1, characterized in that: The flexible lasso is a flexible metal strip and includes a partially crossed and interpenetrating portion to form a loop portion and a winding portion, wherein the two winding ends of the winding portion are respectively wound around the reel and the winding module and installed on the reel and the winding module.

4. The method for detecting the outer diameter of a deformable plastic product according to claim 3, wherein: The flexible metal strip is formed with a through-hole extending along its own length direction on one of the cross parts, and an insertion portion matching the through-hole is formed on the other cross part, and the insertion portion passes through the through-hole. The top and bottom surfaces of the loop portion and the winding portion are respectively flush, and the bottom surface is horizontally attached to the bottom surfaces of the sample slot, the assembly slot and the outlet slot.

5. The method for detecting the outer diameter of a deformable plastic product according to claim 1, wherein: The assembly groove includes a first groove body and a second groove body that are relatively separated, wherein the reel is installed on the first groove body through a rotating connecting piece, and the winding part is inserted from the end and wound around the outer periphery of the reel; the winding module is installed on the second groove body, and the winding part is inserted from the other end and wound around the outer periphery of the winding module.

6. The method for detecting the outer diameter of a deformable plastic product according to claim 5, wherein: The measuring tool also includes a first debugging component, wherein the first debugging component includes an adjusting slider that can be movably extended into the first groove body from one side of the base, and a knob connected to the adjusting slider and extending from the corresponding side of the base, wherein screwing in or loosening the knob drives the adjusting slider to move inward or outward synchronously, and relatively tightens or loosens the reel and the winding part.

7. The method for detecting the outer diameter of a deformable plastic product according to claim 5, wherein: The measuring instrument includes a pull-rod electronic ruler installed on a fixed base, a stop bar connected to the winding module for synchronous movement, and a tension spring that pulls the winding module inward to tighten the ring part. The pull rod of the pull-rod electronic ruler contacts the stop bar, and the stop bar moves synchronously with the winding module. The pull rod and the stop bar movably contact each other to change the extension and contraction amount.

8. The method for detecting the outer diameter of a deformable plastic product according to claim 7, wherein: The winding module is projected into a fan shape from top to bottom. The second slot body includes a fan-shaped slot that matches the winding module, and a bottom slot that is connected to the fan-shaped slot and is used to install a tension spring. The winding module is rotated from the center of the fan and installed in the fan-shaped slot, and the two ends of the tension spring are respectively connected between the base and the winding module.

9. The method for detecting the outer diameter of a deformable plastic product according to claim 1, wherein: In S1 and S2, the reel remains stationary after the position is adjusted, and the annular detection area is driven to tighten inward or expand outward by the rotation of the winding module.

10. The method for detecting the outer diameter of a deformable plastic product according to claim 1, wherein: The width of the through-out slot is greater than or equal to the thickness of the flexible lasso, and the sample slot and the assembly slot are located on opposite sides of the through-out slot, wherein the through-out slot is tangent to the sample slot and the reel respectively.

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