Bottle blank defect detection equipment

Abstract

The invention provides bottle blank defect detection equipment which comprises a rotary table mechanism and a detection mechanism, a plurality of combined grooves are evenly formed in the outer circumference of a rotary table, and bottle blanks can be hung in the combined grooves through pressure-bearing rings so as to rotate along with the rotary table; the detection mechanism comprises a friction plate, a horizontal camera, a swing mechanism and a vertical camera, the friction plate is provided with an inner arc surface which is concentric with the turntable, and the length of the inner arc surface is not smaller than the perimeter of the bottle body, so that when a bottle blank rotating along with the turntable is in contact with the inner arc surface, the bottle blank is in contact with the vertical camera; the bottle neck enables the bottle blank to rotate for at least one circle under the action of friction force; the swinging mechanism is used for driving the horizontal camera to swing back and forth in the horizontal plane and driving the horizontal camera to move along with the bottle blank in contact with the friction plate so as to detect the defects of the circumference of the bottle body rotating on the axis. According to the scheme, the circumferential side wall of the bottle blank can be detected only through one horizontal camera, and the situation of missing detection is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of plastic bottle processing, and in particular to a bottle blank defect detection device. Background Art

[0002] With the rapid development of social economy, PET bottles have been widely used in beverage, medicine, food and other industries. As the demand for PET bottles continues to increase, PET bottles are now mostly manufactured by automated assembly lines to meet social needs. At present, most existing manufacturers still use manual sampling or manual visual inspection to conduct comprehensive inspections on whether the preforms have defects (cracks, scratches, etc.) to control their quality. However, the low frequency of sampling makes it difficult to improve the efficiency of quality control and solve the false detection caused by human fatigue, making it difficult to maintain a stable and accurate detection effect.

[0003] The patent with publication number CN113070230B discloses a rotary preform inspection machine, including a frame, on which an inspection platform is installed, on which a loading turntable, a transfer turntable and a unloading turntable are arranged in sequence, a unloading port is opened on the inspection platform between the transfer turntable and the unloading turntable, a rejection device is arranged on one side of the unloading port, and the rejection device is arranged perpendicular to the length direction of the unloading port, a plurality of inspection cameras are connected to the inspection platform through a mounting frame, the inspection cameras include a vertical camera and a horizontal camera, the vertical camera is arranged close to the loading turntable, and the horizontal camera is arranged close to the transfer turntable; wherein, the number of horizontal cameras arranged is five, four horizontal cameras are evenly distributed around the transfer turntable, the arrangement directions of the four horizontal cameras are all different and the lenses of the four horizontal cameras are all arranged toward the side walls of the preform, and the remaining horizontal camera is arranged below the loading turntable and the lens is arranged toward the bottom of the preform.

[0004] In the above scheme, in order to realize all-round detection of the circumference of the bottle blank, it is necessary to set up multiple horizontal cameras, and the setting directions of the multiple horizontal cameras need to be kept different. However, it is still difficult to detect the opposite sides of two adjacent bottle blanks among the multiple bottle blanks distributed circumferentially on the transfer turntable, so there is still a possibility of missed detection. Summary of the invention

[0005] Based on the above problems existing in the prior art, the present invention aims to solve the technical problem that in order to realize all-round detection of the circumference of the bottle blank in the prior art, multiple horizontal cameras need to be arranged in the rotary bottle blank inspection machine, but there is still missed detection.

[0006] The present invention provides a bottle blank defect detection device, wherein the bottle blank comprises a bottle blank body and a pressure ring, wherein the pressure ring separates the bottle blank body into a bottle mouth and a bottle body, and the device comprises:

[0007] The turntable mechanism comprises a turntable, wherein a plurality of combined grooves are evenly formed on the outer circumference of the turntable, and the preform can be suspended in the combined grooves through the pressure ring to rotate with the turntable;

[0008] The detection mechanism includes a friction plate, a horizontal camera and a swing mechanism, wherein the friction plate has an inner arc surface arranged concentrically with the turntable, and the length of the inner arc surface is not less than the circumference of the bottle body, so that when the bottle blank rotating with the turntable contacts the inner arc surface, the bottle mouth is subjected to the friction force to make the bottle blank rotate at least one circle; the swing mechanism is used to drive the horizontal camera to swing back and forth in the horizontal plane, and drive the horizontal camera to move with the bottle blank contacting the friction plate, so as to detect defects on the circumference of the rotating bottle body.

[0009] According to an embodiment of the present invention, the preform defect detection device further comprises a machine platform and a support platform fixedly arranged on the top of the machine platform, the turntable is suspended and rotatably arranged above the machine platform, and the support platform is located between the machine platform and the turntable;

[0010] The swing mechanism is arranged on the support platform to drive the horizontal camera to swing back and forth on the upper surface of the support platform; the vertical camera is fixedly arranged on the top of the platform and is arranged toward the turntable.

[0011] According to an embodiment of the present invention, the swing mechanism is a crank slider mechanism, comprising:

[0012] A rotating driving member is fixedly arranged on the upper surface of the supporting platform;

[0013] A crank, one end of which is fixedly connected to the output end of the rotating drive member;

[0014] A connecting rod, one end of which is hinged to an end of the crank away from the rotating drive member;

[0015] The slide is hinged to the end of the connecting rod away from the crank, the upper surface of the support platform is provided with a slide groove, the slide is slidably matched with the slide groove, and the horizontal camera is fixedly arranged on the slide.

[0016] According to an embodiment of the present invention, the slide groove is an arc-shaped slide groove and is arranged concentrically with the inner arc surface of the friction plate, so that the reciprocating swing trajectory of the horizontal camera is an arc, and the arc length is not less than the circumference of the bottle body.

[0017] According to one embodiment of the present invention, the bottle blank defect detection equipment also includes a mounting plate and a plurality of support rods, the friction plate is fixedly arranged on the mounting plate, the bottom end of the support rod is fixedly connected to the machine platform, and the top end is fixedly connected to the mounting plate.

[0018] According to one embodiment of the present invention, a plurality of waist-shaped holes are provided on the mounting plate, and a thread is provided on the top end of the support rod. The top end of the support rod passes through the corresponding waist-shaped holes and is fastened with a nut to make the distance between the friction plate and the outer circumference of the turntable adjustable.

[0019] According to one embodiment of the present invention, the turntable includes a bottom plate and a top plate which are spaced apart and fixedly connected, a plurality of first grooves whose shapes match the outer shape of the bottle body are evenly formed on the outer circumference of the bottom plate, a plurality of second grooves whose shapes match the outer shape of the bottle mouth are evenly formed on the outer circumference of the top plate, and the first grooves and the second grooves correspond to each other one by one and are concentrically arranged to form the combined groove; the space between the bottom plate and the top plate is used to accommodate the pressure ring.

[0020] According to an embodiment of the present invention, the friction plate includes an arc-shaped plate and an elastic pad, the arc-shaped plate is fixedly arranged on the outer side of the top plate, and the elastic pad is fixedly arranged on a side surface of the arc-shaped plate facing the top plate.

[0021] According to an embodiment of the present invention, the detection mechanism further comprises a vertical camera, which is arranged toward the bottom of the bottle blank to detect defects of the bottom of the bottle.

[0022] According to an embodiment of the present invention, the bottle blank defect detection equipment further includes a loading mechanism, a bottle rejecting mechanism and a unloading mechanism, and the circumference of the turntable is sequentially provided with a loading position, a detection position, a bottle rejecting position and a unloading position along its rotation direction, and the loading mechanism, the detection mechanism, the bottle rejecting mechanism and the unloading mechanism are sequentially arranged at the loading position, the detection position, the bottle rejecting position and the unloading position, wherein the loading mechanism is used to convey the bottle blank to be detected to the combined groove, the bottle rejecting mechanism is used to reject the unqualified bottle blank after being detected by the detection mechanism from the corresponding combined groove, and the unloading mechanism is used to unload the qualified bottle blank after being detected by the detection mechanism from the corresponding combined groove.

[0023] The beneficial effects of the present invention are:

[0024] The present invention provides a bottle preform defect detection device. When the turntable drives the bottle preform to rotate, the bottle mouth of the bottle preform can contact the friction plate to rotate at least one circle. The swing mechanism can drive the horizontal camera to follow the bottle preform to move, so as to take pictures and detect the circumferential side wall of the rotating bottle preform. Only one horizontal camera is needed to complete the detection of the circumferential side wall of the bottle preform without missing any inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 It is a schematic diagram of the structure of the bottle blank;

[0027] Figure 2 It is a structural schematic diagram of a bottle blank defect detection device provided by an embodiment of the present invention;

[0028] Figure 3 is a top view of a preform defect detection device provided by an embodiment of the present invention;

[0029] Figure 4 yes Figure 2 A magnified schematic diagram of the middle part A;

[0030] Figure numerals: 100-bottle blank; 101-bottle blank body; 102-pressure ring; 103-bottle mouth; 104-bottle body; 1-turntable mechanism; 11-turntable; 111-bottom plate; 1110-first groove; 112-top plate; 1120-second groove; 2-detection mechanism; 21-friction plate; 211-arc plate; 212-elastic pad; 22-horizontal camera; 23-swinging mechanism; 231-rotating drive member; 232-crank; 233-connecting rod; 234-slide seat; 24-vertical camera; 3-machine platform; 4-support platform; 40-slide groove; 5-mounting plate; 50-waist hole; 6-support rod. DETAILED DESCRIPTION

[0031] The following descriptions of the embodiments refer to the attached drawings to illustrate specific embodiments in which the present invention can be implemented.

[0032] The present invention provides a bottle blank defect detection device, such as Figure 1 The figure is a schematic diagram of the structure of a bottle blank 100, wherein the bottle blank 100 includes a bottle blank body 101 and a pressure ring 102, wherein the pressure ring 102 separates the bottle blank body 101 into a bottle mouth 103 and a bottle body 104. The structure of the bottle blank defect detection device is as follows Figure 2 and Figure 3As shown, it includes a turntable mechanism 1 and a detection mechanism 2, wherein the turntable mechanism 1 includes a turntable 11, and the outer circumference of the turntable 11 is evenly provided with a plurality of combined grooves, and the bottle blank 100 can be suspended in the combined grooves through the pressure ring 102 to rotate with the turntable 11; the detection mechanism 2 includes a friction plate 21, a horizontal camera 22, a swing mechanism 23 and a vertical camera 24, and the friction plate 21 has an inner arc surface arranged concentrically with the turntable 11, and the length of the inner arc surface is not less than the circumference of the bottle body 104. The rotating plate 21 is provided with a first end 224 and a second end 226, wherein the first end 226 is provided with a second end 228. The first end 226 is provided with a second end 229 and a second end 221. The first end 228 is provided with a second end 229 and a second end 221. The first end 226 is provided with a second end 229 and a second end 221. The first end 226 is provided with a second end 228 and a second end 221. The first end 226 is provided with a second end 229 and a second end 221. The first end 226 is provided with a second end 229 and a second end 221. The first end 226 is provided with a second end 229 and a second end 221.

[0033] In this solution, when the turntable 11 drives the bottle blank 100 suspended thereon to rotate, the vertical camera 24 can detect defects on the bottle bottom; when the bottle blank 100 rotates to contact the friction plate 21, the bottle mouth 103 rotates at least one circle under the action of friction, and the swing mechanism 23 can drive the horizontal camera 22 to move with the bottle blank 100 in the horizontal plane to detect defects on the circumference of the rotating bottle body 104, so as to avoid missed detection, and only one horizontal camera is needed, which simplifies the overall structure of the equipment and saves costs.

[0034] Please continue to refer to Figure 2 Specifically, the turntable 11 includes a bottom plate 111 and a top plate 112 which are spaced apart and fixedly connected, the bottom plate 111 and the top plate 112 are arranged from bottom to top, a plurality of first grooves 1110 whose shapes match the outer shape of the bottle body 104 are evenly opened on the outer circumference of the bottom plate 111, a plurality of second grooves 1120 whose shapes match the outer shape of the bottle mouth 103 are evenly opened on the outer circumference of the top plate 112, and the first grooves 1110 and the second grooves 1120 correspond to each other one by one and are concentrically arranged to form the combined groove; the interval between the bottom plate 111 and the top plate 112 is used to accommodate the pressure ring 102.

[0035] Further, the friction plate 21 includes an arc plate 211 and an elastic pad 212, wherein the arc plate 211 is fixedly arranged on the outer side of the top plate 112 (the height of the arc plate 211 is higher than the height of the bottom plate 111), and the elastic pad 212 is fixedly arranged on a side surface of the arc plate 211 facing the top plate 112. Preferably, the elastic pad 212 can be a rubber pad.

[0036] It can be understood that due to the characteristic that the elastic pad 212 can be deformed when subjected to force, when the turntable 11 drives the bottle blank 100 to rotate until it contacts the elastic pad 212 (at this time, the bottle mouth 103 of the bottle blank 100 is located between the elastic pad 212 and the top plate 112), the bottle mouth 103 can press the elastic pad 212 to deform it, so that the uneven surface of the bottle mouth 103 (the circumference of the bottle mouth 103 is provided with threads that cooperate with the bottle cap) is in full contact with the elastic pad 212, thereby increasing the friction force on the bottle mouth 103, so that the bottle mouth 103 can rotate more reliably to avoid slipping.

[0037] Furthermore, the heights of the arc plate 211, the elastic pad 212 and the top plate 112 are not less than the height of the bottle mouth 103, which can increase the contact area between the bottle mouth 103 and the elastic pad 212, thereby increasing the friction force.

[0038] In this embodiment, the preform defect detection device further includes a machine platform 3 and a support platform 4 fixedly arranged on the top of the machine platform 3, the turntable 11 is suspended and rotatably arranged above the machine platform 3, and the support platform 4 is located between the machine platform 3 and the turntable 11;

[0039] The swing mechanism 23 is disposed on the support platform 4 to drive the horizontal camera 22 to swing back and forth on the upper surface of the support platform 4 ; the vertical camera 24 is fixedly disposed on the top of the machine platform 3 and is disposed toward the turntable 11 .

[0040] Furthermore, the swing mechanism 23 is a crank slider mechanism, such as Figure 4 Shown bit Figure 2 In the enlarged schematic diagram of part A in the middle, the swing mechanism 23 includes a rotating drive member 231, a crank 232, a connecting rod 233 and a slide 234, wherein the rotating drive member 231 is fixedly arranged on the upper surface of the support platform 4. Specifically, the rotating drive member 231 can be a motor; one end of the crank 232 is fixedly connected to the output end of the rotating drive member 231; one end of the connecting rod 233 is hinged to the end of the crank 232 away from the rotating drive member 231; the slide 234 is hinged to the end of the connecting rod 233 away from the crank 232, a slide groove 40 is opened on the upper surface of the support platform 4, the slide 234 is slidably matched with the slide groove 40, and the horizontal camera 22 is fixedly arranged on the slide 234.

[0041] Preferably, the slide groove 40 is an arc-shaped slide groove and is arranged concentrically with the inner arc surface of the friction plate 21 , so that the trajectory of the reciprocating swing of the horizontal camera 22 is an arc, and the arc length is not less than the circumference of the bottle body 104 .

[0042] It can be understood that by setting the reciprocating swing trajectory of the horizontal camera 22 to an arc, the distance between the horizontal camera 22 and the bottle blank 100 in the detection process can be kept consistent, so that the detection accuracy of the horizontal camera 22 at all points on the circumference of the same bottle blank 100 is consistent.

[0043] It should be noted that setting the swing mechanism 23 as a crank slider mechanism is only a preferred embodiment of the present scheme, and does not limit the swing principle of the swing mechanism 23. In other embodiments, the swing mechanism 23 can also be implemented by other principles, such as a pendulum mechanism.

[0044] Please continue to refer to Figure 2 and Figure 3 In this embodiment, in order to realize the installation and fixation of the friction plate 21, the bottle blank defect detection equipment also includes a mounting plate 5 and a plurality of support rods 6. The friction plate 21 is fixedly arranged on the mounting plate 5. The bottom end of the support rod 6 is fixedly connected to the machine table 3, and the top end is fixedly connected to the mounting plate 5.

[0045] Furthermore, a plurality of waist-shaped holes 50 are provided on the mounting plate 5, and a thread is provided on the top end of the support rod 6. The top end of the support rod 6 passes through the corresponding waist-shaped hole 50 and is fastened with a nut so that the distance between the friction plate 21 and the outer circumference of the turntable 11 can be adjusted.

[0046] It can be understood that by setting the distance between the friction plate 21 and the outer circumference of the turntable 11 to be adjustable, it can match the bottle blanks 100 with different outer diameters, thereby being compatible with defect detection of bottle blanks 100 with different outer diameter specifications.

[0047] According to an embodiment of the present invention, the bottle blank defect detection device further includes a loading mechanism, a bottle rejection mechanism and a unloading mechanism. The circumference of the turntable 11 is sequentially provided with a loading position, a detection position, a bottle rejection position and a unloading position along its rotation direction. The loading mechanism, the detection mechanism 2, the bottle rejection mechanism and the unloading mechanism are sequentially arranged at the loading position, the detection position, the bottle rejection position and the unloading position. The loading mechanism is used to transport the bottle blank 100 to be detected to the combined groove. Specifically, the loading mechanism can be a loading robot; The bottle rejection mechanism is used to reject unqualified bottle blanks 100 after being detected by the detection mechanism 2 from the corresponding combined grooves. Specifically, the bottle rejection mechanism can be a pushing cylinder arranged at the detection position, and the piston rod of the pushing cylinder can move along the radial direction of the turntable 11 to push the bottle blanks 100 moved to the bottle rejection position out of the corresponding combined grooves; the unloading mechanism is used to unload qualified bottle blanks 100 after being detected by the detection mechanism 2 from the corresponding combined grooves. Specifically, the unloading mechanism can be an unloading robot.

[0048] In order to facilitate the understanding of this scheme, the following Figure 1-Figure 4 The working principle of the present invention is described in detail:

[0049] During operation, the feeding mechanism feeds the preform 100 to be inspected into the combined groove corresponding to the feeding position, and the turntable 11 rotates to transfer the preform 100 to the inspection position. When the preform 100 is transferred to the inspection position, the mouth 103 of the preform 100 is clamped between the elastic pad 212 and the top plate 112. At this time, the mouth 103 presses the elastic pad 212 to deform it, and a large friction force is generated between the two. As the turntable 11 continues to rotate, the preform 100 rotates due to the friction force.

[0050] When the preform 100 starts to rotate (the bottle mouth 103 starts to contact the elastic pad 212), the swing mechanism 23 starts to drive the horizontal camera 22 to follow the preform 100 until the preform 100 is out of contact with the friction plate 21; during which the preform 100 rotates at least one circle, the horizontal camera 22 continuously takes pictures of the rotating preform 100, so as to visually detect the defects on the circumferential side wall of the preform 100; the vertical camera 24 is located on the machine table 3 below the preform moving path, and can take pictures to detect the defects at the bottom of the preform 100. After the preform 100 is out of contact with the friction plate 21, the swing mechanism 23 drives the horizontal camera 22 to move in the opposite direction to the initial position (the time required for the preform 100 to move from the loading position to the detection position is greater than the time required for the horizontal camera 22 to move from the final position to the initial position) to detect the next preform 100.

[0051] The horizontal camera 22 and the vertical camera 24 send the detection results to the bottle rejection mechanism. When the preforms 100 are transferred to the bottle rejection position, the bottle rejection mechanism rejects the defective preforms 100 based on the detection results. The qualified preforms 100 continue to flow to the unloading position and are unloaded by the unloading mechanism to the next process.

[0052] In summary, in a bottle blank defect detection device provided by the present invention, when the turntable 11 drives the bottle blank 100 to rotate, the bottle mouth 103 of the bottle blank 100 can contact the friction plate 21 to rotate at least one circle, and the swing mechanism 23 can drive the horizontal camera 22 to move with the bottle blank 100 to take pictures and detect the circumferential side wall of the rotating bottle blank 100. Only one horizontal camera 22 is needed to complete the detection of the circumferential side wall of the bottle blank 100, and there will be no missed detection.

[0053] It should be noted that although the present invention is disclosed as above by specific embodiments, the above embodiments are not intended to limit the present invention. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A bottle blank defect detection device, the bottle blank (100) comprising a bottle blank body (101) and a pressure ring (102), the pressure ring (102) separating the bottle blank body (101) into a bottle mouth (103) and a bottle body (104), characterized in that: include: A turntable mechanism (1) comprises a turntable (11), wherein a plurality of combined grooves are evenly arranged on the outer circumference of the turntable (11), and the preform (100) can be suspended in the combined grooves through the pressure ring (102) to rotate along with the turntable (11); The detection mechanism (2) comprises a friction plate (21), a horizontal camera (22) and a swing mechanism (23), wherein the friction plate (21) has an inner arc surface arranged concentrically with the turntable (11), and the length of the inner arc surface is not less than the circumference of the bottle body (104), so that when the bottle blank (100) rotating with the turntable (11) contacts the inner arc surface, the bottle mouth (103) is subjected to the friction force to cause the bottle blank (100) to rotate at least one circle; the swing mechanism (23) is used to drive the horizontal camera (22) to swing back and forth in a horizontal plane, and drive the horizontal camera (22) to move following the bottle blank (100) in contact with the friction plate (21), so as to detect defects on the circumference of the rotating bottle body (104).

2. A preform defect detection device according to claim 1, characterized in that: It also comprises a machine platform (3) and a support platform (4) fixedly arranged on the top of the machine platform (3); the turntable (11) is suspended and rotatably arranged above the machine platform (3); and the support platform (4) is located between the machine platform (3) and the turntable (11); The swing mechanism (23) is arranged on the support platform (4) to drive the horizontal camera (22) to swing back and forth on the upper surface of the support platform (4); the vertical camera (24) is fixedly arranged on the top of the machine platform (3) and is arranged toward the turntable (11).

3. A preform defect detection device according to claim 2, characterized in that: The swing mechanism (23) is a crank slider mechanism, comprising: A rotating driving member (231) is fixedly arranged on the upper surface of the supporting platform (4); A crank (232), one end of which is fixedly connected to the output end of the rotating driving member (231); A connecting rod (233), one end of which is hinged to an end of the crank (232) away from the rotating driving member (231); The slide seat (234) is hinged to one end of the connecting rod (233) away from the crank (232), and a slide groove (40) is provided on the upper surface of the support platform (4). The slide seat (234) is slidably matched with the slide groove (40), and the horizontal camera (22) is fixedly arranged on the slide seat (234).

4. The bottle blank defect detection device according to claim 3, characterized in that: The slide groove (40) is an arc-shaped slide groove and is arranged concentrically with the inner arc surface of the friction plate (21), so that the trajectory of the reciprocating swing of the horizontal camera (22) is an arc, and the arc length is not less than the circumference of the bottle body (104).

5. The bottle blank defect detection device according to claim 1, characterized in that: It also comprises a mounting plate (5) and a plurality of support rods (6), wherein the friction plate (21) is fixedly arranged on the mounting plate (5), the bottom end of the support rod (6) is fixedly connected to the machine platform (3), and the top end is fixedly connected to the mounting plate (5).

6. The preform defect detection device according to claim 5, characterized in that: The mounting plate (5) is provided with a plurality of waist-shaped holes (50), the top end of the support rod (6) is provided with a thread, and the top end of the support rod (6) is fastened with a nut after passing through the corresponding waist-shaped hole (50), so that the distance between the friction plate (21) and the outer circumference of the rotating disk (11) can be adjusted.

7. The bottle blank defect detection device according to claim 1, characterized in that: The turntable (11) comprises a bottom plate (111) and a top plate (112) which are arranged at intervals and fixedly connected. The bottom plate (111) is evenly provided with a plurality of first grooves (1110) whose shapes match the outer shape of the bottle body (104). The top plate (112) is evenly provided with a plurality of second grooves (1120) whose shapes match the outer shape of the bottle mouth (103). The first grooves (1110) and the second grooves (1120) correspond to each other one by one and are arranged concentrically. The interval between the bottom plate (111) and the top plate (112) is used to accommodate the pressure ring (102).

8. The bottle blank defect detection device according to claim 7, characterized in that: The friction plate (21) comprises an arc-shaped plate (211) and an elastic pad (212); the arc-shaped plate (211) is fixedly arranged on the outer side of the top plate (112); and the elastic pad (212) is fixedly arranged on a side surface of the arc-shaped plate (211) facing the top plate (112).

9. The bottle blank defect detection device according to claim 1, characterized in that: The detection mechanism (2) also includes a vertical camera (24), which is arranged toward the bottom of the bottle blank (100) and is used to detect defects on the bottom of the bottle.

10. The bottle blank defect detection device according to claim 1, characterized in that: The rotary disk (11) further comprises a loading mechanism, a bottle rejecting mechanism and a unloading mechanism. The circumference of the rotary disk (11) is provided with a loading position, a detection position, a bottle rejecting position and a unloading position in sequence along its rotation direction. The loading mechanism, the detection mechanism (2), the bottle rejecting mechanism and the unloading mechanism are arranged in sequence at the loading position, the detection position, the bottle rejecting position and the unloading position. The loading mechanism is used to transport the preforms (100) to be detected to the combined grooves. The bottle rejecting mechanism is used to reject unqualified preforms (100) detected by the detection mechanism (2) from the corresponding combined grooves. The unloading mechanism is used to remove qualified preforms (100) detected by the detection mechanism (2) from the corresponding combined grooves.

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