A process for producing wear-resistant bottle preforms

Abstract

The application discloses an anti-wear bottle blank production process which uses a production device, the production device comprises a conveying belt, a plurality of bottle blank bodies are equidistantly distributed on the top of the conveying belt, a supporting frame is installed on the right side of each bottle blank body, a positioning mechanism is installed below the left end of the supporting frame, and a polishing mechanism is installed above the left end of the supporting frame; the V-shaped polishing plate is tightly attached to the top end of the spiral disc of the bottle blank body, then the polishing plate can rotate along the spiral disc of the bottle blank body through repeated rotation of the bottle blank body, and since the polishing plate fully wraps the spiral disc, the spiral disc of the bottle blank body can be fully polished, the situation that scratches are generated between two bottle blanks during transportation is avoided, the bottle blank body is fixed for the first time through the positioning mechanism, the limiting column can fix the bottle blank body for the second time through the limiting assembly, and the phenomenon that the bottle blank body deviates is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bottle blank production, in particular to an anti-wear bottle blank production process. BACKGROUND

[0002] The packaging containers including plastic bottles, oil barrels, cosmetic boxes, shampoo plastic bottles, spray bottles, etc. are necessary products for people's daily life needs.

[0003] The bottle blank will be stacked in the storage frame after production, and in this process, the screw port of the bottle blank will rub against the body of the adjacent bottle blank, which will cause scratches on the outer surface of the bottle blank, thereby increasing the defects of the bottle blank. Therefore, in order to increase the wear resistance of the bottle blank and avoid scratches, an anti-wear device is needed to polish the screw port of the bottle blank first to make the surface smooth.

[0004] There are at least the following problems in the prior art: when polishing the bottle blank, the sandpaper needs to be placed on the thread disc of the screw port of the bottle blank first, and then the bottle blank is rotated, which can polish the thread disc of the screw port. Since the production equipment can only polish the outer wall of the thread disc, it cannot process the upper and lower surfaces of the thread disc, so when it contacts the adjacent bottle blank, it will also produce scratches. SUMMARY

[0005] To achieve the above purpose, the present application provides the following technical scheme: an anti-wear bottle blank production process uses a production device, which includes a conveying belt, a plurality of bottle blank bodies are equidistantly distributed on the top of the conveying belt, a plurality of supporting frames are installed on the right side of the conveying belt, a positioning mechanism is installed below the left end of the supporting frame, and a polishing mechanism is installed above the left end of the supporting frame.

[0006] The polishing mechanism includes a supporting plate, a third rack, a pressing plate, a third toothed disc, a limiting column, a polishing frame, a first toothed disc, and a limiting assembly. The supporting plate is slidably connected above and below the left end of the supporting frame, the pressing plate is installed at the bottom of the supporting plate and directly above the bottle blank body, the limiting column is slidably connected inside the pressing plate, the polishing frame is installed on the right side of the limiting column, the third toothed disc is installed on the top of the limiting column, the third rack is in meshing transmission behind the third toothed disc, the rear surface of the third rack is slidably installed with a rear baffle, the rear baffle is fixedly connected with the supporting plate, the first toothed disc is rotatably connected below the outer side wall of the limiting column, and the limiting assembly is installed inside the limiting column.

[0007] The above production device is used to polish the bottle blank, which includes the following steps:

[0008] The first step: after the plurality of bottle blank bodies are equidistantly placed on the top of the conveying belt, the bottle blank bodies are moved to correspond to the position of the supporting frame, the limit column is inserted into the bottle body through the bottle mouth by driving the limit column and the supporting plate, and the limit column is stopped from moving downward when the first gear plate contacts the bottle mouth;

[0009] The second step: while the positioning mechanism positions the bottle blank body, the position of the bottle blank body is adjusted.

[0010] The third step: after the above operation is completed, the limit column continues to move downward, the limit assembly can fix the bottle blank body through the lower pressing plate, and at the same time, the grinding frame can tightly abut against the spiral disc at the top of the bottle blank body, the bottle blank body can be synchronously rotated through the third gear rack, and then the grinding frame grinds the spiral disc at the top of the bottle blank body in all directions, the third gear rack can be reset when the grinding frame is located at the bottom of the spiral disc, and the grinding frame moves upward in the process, so that the reciprocating operation is realized.

[0011] Preferably, the limit assembly comprises a lower connecting plate, a driving rod, an anti-skid plate, an auxiliary rod, a fourth spring frame and a circular ring frame, a receiving groove is formed in the inside of the limit column, the lower connecting plate is slidably connected in the inside of the receiving groove, a horizontal plate is installed on the outer side wall of the lower connecting plate, the horizontal plate extends to the outside of the limit column after penetrating through the receiving groove, a circular ring frame is slidably installed on the lower side of the outer side wall of the limit column, two groups of auxiliary rods are symmetrically installed on the outer side wall of the limit column and below the circular ring frame, the number of the auxiliary rods in each group is two, the anti-skid plate is rotatably installed at the end of each group of auxiliary rods away from the limit column, the driving rod is installed on the top of the anti-skid plate, the driving rod is rotatably connected with the circular ring frame, and the fourth spring frame is installed on the bottom of the circular ring frame and between the auxiliary rods and outside the outer side wall of the limit column.

[0012] Preferably, the grinding frame comprises a first telescopic plate, an inclined plate, an inclined frame, a grinding plate, a vertical plate and a fifth spring frame, the left end of the supporting frame is provided with the first telescopic plate, the first telescopic plate comprises an outer square sleeve and an inner square rod, the outer square sleeve and the inner square rod are slidably connected, the inclined frame is installed on the front surface of the inner square rod, the inclined plate is slidably connected in the inside of the inclined frame, the top of the inclined plate is fixedly connected with the supporting plate, the vertical plate is installed on the left end of the inner square rod, a long slot is formed in the left end of the vertical plate, the grinding plate is slidably connected in the inside of the long slot, and the fifth spring frame is installed between the bottom of the long slot and the bottom of the grinding plate.

[0013] Preferably, the positioning mechanism comprises a correction assembly, a push-down rod, a buffer assembly, a second rack, a meander plate, a second toothed disc, a round plate, a connecting plate, a positioning frame, the left end of the supporting frame is provided with the meander plate, two connecting plates are symmetrically arranged in the meander groove of the meander plate, the top of the connecting plate is provided with the positioning frame, the bottom of the meander plate is rotatably connected with the round plate, the bottom of the round plate is symmetrically provided with two external connecting rods, the external connecting rods are rotatably connected with the connecting plate and the bottom of the round plate respectively, the bottom of the round plate is provided with the second toothed disc, the bottom of the rear end surface of the meander plate is provided with the square plate, the front end surface of the square plate is slidably connected with the second rack, the second rack is in meshing transmission with the second toothed disc, the left side of the second rack is provided with the push-down rod through the buffer assembly, and the upper side of the push-down rod is provided with the correction assembly.

[0014] Preferably, the correction assembly comprises a push-up rod, a first rack and a first spring frame, the first rack is slidably arranged in the slide plate on one side of the supporting plate, the first rack is in meshing transmission with the first toothed disc, the bottom of the first toothed disc is provided with a second telescopic plate, the rear surface of the first rack is provided with the first spring frame, the right end of the first spring frame is connected with the slide plate, and the bottom of the first rack is provided with the push-up rod.

[0015] Preferably, the buffer assembly comprises a second spring frame and a buffer rod, the buffer rod is arranged behind the second rack, the push-down rod and the second rack are slidably arranged on the outer side wall of the buffer rod, the right end of the buffer rod is fixedly connected with the square plate at the bottom of the meander plate, and the second spring frame is sleeved on the outer side wall of the buffer rod and arranged between the right end of the push-down rod and the left end of the second rack.

[0016] Preferably, the positioning frame comprises a horizontal plate and a screw rod, the top of the connecting plate is provided with the screw rod, the inside of the screw rod is threadedly connected with a plurality of horizontal plates, and one end of the horizontal plate is provided with a spherical ball.

[0017] Compared with the prior art, the present application has the following beneficial effects:

[0018] 1. The correction assembly can make the top of the spiral disc of the bottle blank body correspond to the position of the polishing plate, so that the polishing plate in V-shaped structure is tightly attached to the top end of the spiral disc of the bottle blank body, and then the polishing plate can rotate along the spiral disc of the bottle blank body through repeated rotation of the bottle blank body. Since the polishing plate fully wraps the spiral disc, the spiral disc of the bottle blank body can be fully polished, thereby avoiding scratches between two bottle blanks during transportation.

[0019] 2. The positioning mechanism can fix the preform body for the first time, ensuring that the preform body does not shift left or right when the position of the preform body is calibrated. The limiting component can fix the preform body for the second time by the limiting post, ensuring that the preform body does not shift when it rotates. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the conveyor belt, support frame, preform body, positioning mechanism and grinding mechanism in this invention;

[0022] Figure 3 For the present invention Figure 2 Enlarged structural diagram of region A in the middle;

[0023] Figure 4 This is a schematic diagram of the connection structure between the preform body and the first toothed disc in this invention;

[0024] Figure 5 For the present invention Figure 4 A magnified structural diagram of region B in the middle;

[0025] Figure 6 This is a cross-sectional structural diagram of the present invention (viewed from front to back).

[0026] Figure 7 For the present invention Figure 6 A magnified structural diagram of region C in the middle;

[0027] Figure 8 This is a cross-sectional structural diagram of the vertical plate and the grinding plate in this invention (viewed from front to back).

[0028] Figure 9 This is a schematic diagram of the connection structure of the pressure plate, the third toothed disc, the limiting post, and the limiting assembly in this invention;

[0029] Figure 10 This is a cross-sectional view of the limiting post in this invention (viewed from front to back).

[0030] Figure 11 This is a cross-sectional view of the limiting post in this invention (viewed from bottom to top).

[0031] Figure 12 This is a schematic diagram of the positioning mechanism in this invention;

[0032] Figure 13 This is a schematic diagram of the structure of the preform body in this invention.

[0033] In the figure: 1, conveying belt; 2, support frame; 3, bottle blank body; 4, positioning mechanism; 5, polishing mechanism; 41, correction assembly; 411, push-up rod; 412, first rack; 413, first spring frame; 42, push-down rod; 43, buffer assembly; 431, second spring frame; 432, buffer rod; 44, second rack; 45, return plate; 46, second toothed disc; 47, round plate; 471, outer connecting rod; 48, connecting plate; 49, positioning frame; 491, horizontal plate; 492, screw rod; 51, supporting plate; 52, third rack; 53, pressing plate; 54, third toothed disc; 55, limiting column; 56, polishing frame; 561, first telescopic plate; 562, inclined plate; 563, inclined frame; 564, polishing plate; 565, vertical plate; 566, fifth spring frame; 57, first toothed disc; 571, second telescopic plate; 58, limiting assembly; 581, lower connecting plate; 582, driving rod; 583, anti-skid plate; 584, auxiliary rod; 585, fourth spring frame; 586, round ring frame. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0035] As shown in Figure 1 , Figure 2 and Figure 13 , an anti-wear bottle blank production process uses a production device, which includes a conveying belt 1, a plurality of bottle blank bodies 3 are equidistantly distributed on the top of the conveying belt 1, a plurality of support frames 2 are installed on the right side of the conveying belt 1, a positioning mechanism 4 is installed below the left end of the support frame 2, and a polishing mechanism 5 is installed above the left end of the support frame 2.

[0036] As shown in Figure 3 , the polishing mechanism 5 includes a supporting plate 51, a third rack 52, a pressing plate 53, a third toothed disc 54, a limiting column 55, a polishing frame 56, a first toothed disc 57, and a limiting assembly 58. The supporting plate 51 is slidably connected above and below the left end of the support frame 2. The pressing plate 53 is installed at the bottom of the supporting plate 51 and directly above the bottle blank body 3. The limiting column 55 is slidably connected inside the pressing plate 53. The polishing frame 56 is installed on the right side of the limiting column 55. The third toothed disc 54 is installed on the top of the limiting column 55. The third toothed disc 54 is meshed and driven by the third rack 52 at the back. The rear baffle is slidably installed on the back surface of the third rack 52. The rear baffle is fixedly connected with the supporting plate 51. The first toothed disc 57 is rotatably connected to the outer side wall of the limiting column 55. The limiting assembly 58 is installed inside the limiting column 55.

[0037] Specifically, a plurality of bottle blank bodies 3 are placed equidistantly on the top of the conveying belt 1, and then the conveying belt 1 is intermittently rotated. When the bottle blank bodies 3 move to the position of the supporting frame 2, the supporting plate 51 can be moved downward by an external electric telescopic device. In this process, the pressing plate 53 drives the limiting column 55 to be inserted into the bottle body through the bottle mouth. When the first tooth disc 57 on the outer wall of the limiting column 55 contacts the bottle mouth, the downward movement of the pressing plate 53 is stopped. Then, the positioning mechanism 4 can position and adjust the position of the bottle blank body 3. After the positioning mechanism 4 is completed, the pressing plate 53 is continuously moved downward. Since the limiting column 55 is fixed at the bottle blank body 3 by the support of the first tooth disc 57, when the pressing plate 53 continues to move downward, it will slide downward along the outer wall of the limiting column 55. When the pressing plate 53 contacts the limiting assembly 58, the limiting assembly 58 can fix the bottle blank body 3, and at the same time, the polishing frame 56 can tightly contact the spiral disc at the top of the bottle blank body 3. The third tooth disc 54 connected with the third rack 52 is driven to rotate by an external electric push rod, and then the third tooth disc 54 drives the bottle blank body 3 connected with the limiting column 55 to rotate synchronously. In this way, the polishing frame 56 can polish the spiral disc at the top of the bottle blank body 3 in all directions. When the polishing frame 56 is at the bottom of the spiral disc, the third rack 52 can be reset, and then the bottle blank body 3 rotates in the opposite direction. In this process, the polishing frame 56 moves upward. Through the reciprocating operation, the spiral mouth of the bottle blank body 3 is fully polished, and the phenomenon of scratches between two bottle blank bodies 3 during transportation is avoided.

[0038] As Figure 3 , Figure 6 , Figure 7 and Figure 8As shown, the polishing frame 56 comprises a first telescopic plate 561, an inclined plate 562, an inclined frame 563, a polishing plate 564, a vertical plate 565 and a fifth spring frame 566, the left end of the supporting frame 2 is provided with the first telescopic plate 561, the first telescopic plate 561 comprises an outer square sleeve and an inner square rod, the outer square sleeve and the inner square rod are in sliding connection, the front surface of the inner square rod is provided with the inclined frame 563, the inside of the inclined frame 563 is in up-down sliding connection with the inclined plate 562, the top of the inclined plate 562 is fixedly connected with the supporting plate 51, the left end of the inner square rod is provided with the third spring frame 566, the left end of the vertical plate 565 is provided with a long slot, the inside of the long slot is in up-down sliding connection with the polishing plate 564, the fifth spring frame 566 is arranged between the bottom of the long slot and the bottom of the polishing plate 564, specifically, in the process that the supporting plate 51 moves downwards, the inclined plate 562 moves downwards synchronously, when the inclined surface section of the inclined plate 562 contacts with the inclined frame 563, the inner square rod in the first telescopic plate 561 drives the polishing plate 564 connected with the vertical plate to contact with the spiral disc of the bottle blank body 3, since the polishing plate 564 is V-shaped structure, the polishing plate 564 can fully wrap the spiral disc, in the process that the spiral disc rotates forward and reversely, the polishing plate 564 moves up and down, in this way, the spiral disc can be fully polished, when the polishing plate 564 moves away from the spiral disc, the compressed fifth spring frame 566 drives the polishing plate 564 to reset upwards.

[0039] As Figure 9 , Figure 10 and Figure 11As shown, the limiting assembly 58 comprises a lower connecting plate 581, a driving rod 582, an anti-skid plate 583, an auxiliary rod 584, a fourth spring frame 585 and a circular ring frame 586, the inside of the limiting column 55 is provided with a receiving groove, the inside of the receiving groove is slidably connected with the lower connecting plate 581, the outer side wall of the lower connecting plate 581 is provided with a horizontal plate above, the horizontal plate extends to the outside of the limiting column 55 after penetrating the receiving groove, the outer side wall of the limiting column 55 is slidably provided with the circular ring frame 586 below, the circular ring frame 586 is fixedly connected with the lower connecting plate 581, two groups of auxiliary rods 584 are symmetrically installed on the outer side wall of the limiting column 55 below the circular ring frame 586, the number of each group of auxiliary rods 584 is two, the anti-skid plate 583 is rotatably installed at one end of each group of auxiliary rods 584 away from the limiting column 55, the driving rod 582 is installed on the top of the anti-skid plate 583, the driving rod 582 is rotatably connected with the circular ring frame 586, the fourth spring frame 585 is installed on the outer side wall of the limiting column 55 and located between the auxiliary rods 584, the specific work is that when the pressing plate 53 moves downward and contacts the horizontal plate connected with the lower connecting plate 581, the pressing plate 53 drives the lower connecting plate 581 to move downward synchronously, in this process, the lower connecting plate 581 drives the circular ring frame 586 to slide downward, then the driving rod 582 connected with the circular ring frame 586 drives the anti-skid plate 583 to tightly contact the inner side wall of the bottle blank body 3 under the cooperation of the auxiliary rods 584, in this way, the bottle blank body 3 can be fixed for the second time, when it is needed to make the limiting column 55 separate from the bottle blank body 3, the pressing plate 53 can be moved upward, in this process, the compressed fourth spring frame 585 drives the circular ring frame 586 to move upward, then the anti-skid plate 583 separates from the inner side wall of the bottle blank body 3, then the pressing plate 53 can drive the limiting column 55 to separate from the bottle mouth.

[0040] As Figure 12As shown, the positioning mechanism 4 comprises a correction assembly 41, a push-down rod 42, a buffer assembly 43, a second rack 44, a meander plate 45, a second toothed disc 46, a round plate 47, a connecting plate 48, and a positioning frame 49. The meander plate 45 is installed below the left end of the support frame 2, two connecting plates 48 are symmetrically installed in the meander groove of the meander plate 45, the positioning frame 49 is installed on the top of the connecting plate 48, the round plate 47 is rotatably connected to the bottom of the meander plate 45, two outer connecting rods 471 are symmetrically installed on the bottom of the round plate 47, the outer connecting rods 471 are rotatably connected to the bottom of the connecting plate 48, the second toothed disc 46 is installed on the bottom of the round plate, a square plate is installed on the bottom of the rear end face of the meander plate 45, the second rack 44 is slidably connected to the front end face of the square plate, the second rack 44 is in meshing transmission with the second toothed disc 46, the push-down rod 42 is installed on the left side of the second rack 44 through the buffer assembly 43, and the correction assembly 41 is installed above the push-down rod 42. In specific work, the push-down rod 42 is pushed to the right by the external sliding module, in this process, the second rack 44 drives the second toothed disc 46 to rotate through the cooperation of the buffer assembly 43, then the round plate 47 connected with the second toothed disc 46 relatively moves through the outer connecting rod 471, then the outer connecting rod 471 drives the positioning frame 49 to clamp the bottle blank body 3, in this way, the bottle blank body 3 is fixed, and in the process that the push-down rod 42 continuously moves to the right, the push-down rod 42 drives the correction assembly 41 to correct the position of the bottle blank body 3, so that the top end of the spiral disc corresponds to the polishing frame 56.

[0041] As shown in Figure 3 , Figure 4 and Figure 5 , the correction assembly 41 comprises an upper push rod 411, a first rack 412, and a first spring frame 413. The first rack 412 is slidably installed in the slide plate on one side of the supporting plate 51, the first rack 412 is in meshing transmission with the first toothed disc 57, the second telescopic plate 571 is installed on the bottom of the first toothed disc 57, the first spring frame 413 is installed on the rear surface of the first rack 412, the right end of the first spring frame 413 is connected with the slide plate, the upper push rod 411 is installed on the bottom of the first rack 412. In specific work, when the push-down rod 42 moves to the right and contacts the upper push rod 411, the upper push rod 411 drives the first toothed disc 57 connected with the first rack 412 to rotate one circle, in this process, the second telescopic plate 571 on the bottom of the first toothed disc 57 contacts the spiral disc, when the second telescopic plate 571 rotates to the top end of the spiral disc, the bottle blank body 3 is synchronously rotated, when one circle rotation is completed, the top of the spiral disc of the bottle blank body 3 corresponds to the polishing frame 56, in this way, the spiral disc can be polished comprehensively.

[0042] As shown in Figure 12As shown, the buffer assembly 43 comprises a second spring frame 431 and a buffer rod 432, the buffer rod 432 is installed at the rear of the second rack 44, the push-down rod 42 and the second rack 44 slide left and right along the outer side wall of the buffer rod 432, the right end of the buffer rod 432 is fixedly connected with the square plate at the bottom of the meander plate 45, and the second spring frame 431 sleeved on the outer side wall of the buffer rod 432 is installed between the right end of the push-down rod 42 and the left end of the second rack 44. In particular, during the right movement of the push-down rod 42, the second spring frame 431 which is not compressed will push the second rack 44 to move right synchronously due to the large elastic coefficient of the second spring frame 431 and the difficulty of deformation. When the two positioning frames 49 clamp the bottle blank body 3, the second toothed disc 46 will stop rotating, and then the second rack 44 will stop moving right. Since the push-down rod 42 continues to move right, the push-down rod 42 will compress the second spring frame 431 in the process. When the push-down rod 42 contacts the push-up rod 411, the push-up rod 411 drives the first toothed disc 57 to rotate. In this way, the positioning and position correction can be performed while avoiding the jamming phenomenon.

[0043] As shown in the figure, Figure 12 The positioning frame 49 comprises a horizontal plate 491 and a screw rod 492, and the screw rod 492 is installed at the top of the connecting plate 48. The screw rod 492 is internally threaded and connected with a plurality of horizontal plates 491. One end of the horizontal plate 491 is provided with a spherical ball. In particular, the screw rod 492 can be rotated in reverse or forward direction. In this way, the screw rod 492 can maintain the same arc as the outer side wall of the bottle blank body 3. When the positioning frame 49 contacts the bottle blank body 3, it can be fully clamped.

[0044] When the above production device is used to polish the bottle blank, the following steps are included:

[0045] First step: a plurality of bottle blank bodies 3 are placed equidistantly on the top of the conveying belt 1, then the bottle blank bodies 3 are moved to correspond to the position of the supporting frame 2, the supporting frame 2 is driven by the supporting plate 51, the limiting column 55 is inserted into the bottle body through the bottle mouth, and when the first toothed disc 57 contacts the bottle mouth, the pressing plate 53 stops moving downward;

[0046] Second step: the positioning mechanism 4 positions the bottle blank body 3 and adjusts the position of the bottle blank body 3 at the same time;

[0047] Third step: after the above operation is completed, the pressing plate 53 continues to move downward, the limiting assembly 58 can fix the bottle blank body 3 through the pressing plate 53, and at the same time, the polishing frame 56 can tightly contact the spiral disc at the top of the bottle blank body 3, the bottle blank body 3 can be rotated synchronously through the third rack 52, and then the polishing frame 56 polishes the spiral disc at the top of the bottle blank body 3 in all directions. When the polishing frame 56 is located at the bottom of the spiral disc, the third rack 52 can be reset, and in this process, the polishing frame 56 will move upward, and the reciprocating operation is thus realized.

[0048] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since numerous changes, modifications, substitutions and variations can be made thereto without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. A process for the production of wear-resistant preforms, using a production device comprising a conveyor belt (1), characterized in that: The right side of the conveying belt (1) is equipped with a plurality of support frames (2), the left end of the support frame (2) is equipped with a positioning mechanism (4) below, and the left end of the support frame (2) is equipped with a polishing mechanism (5) above. The polishing mechanism (5) comprises a supporting plate (51), a third rack (52), a pressing plate (53), a third tooth disc (54), a limiting column (55), a polishing frame (56), a first tooth disc (57) and a limiting assembly (58), the left end of the support frame (2) is slidably connected with the supporting plate (51) above, the bottom of the supporting plate (51) and above the bottle blank body (3) is equipped with the pressing plate (53), the inside of the pressing plate (53) is slidably connected with the limiting column (55), the right side of the limiting column (55) is equipped with the polishing frame (56), the top of the limiting column (55) is equipped with the third tooth disc (54), the rear side of the third tooth disc (54) is engaged with the third rack (52) in transmission, the rear surface of the third rack (52) is slidably equipped with a rear baffle, the rear baffle is fixedly connected with the supporting plate (51), the lower side of the outer wall of the limiting column (55) is rotatably connected with the first tooth disc (57), and the inside of the limiting column (55) is equipped with the limiting assembly (58). When the above production device is used for polishing the bottle blank, the following steps are included: First step: a plurality of bottle blank bodies (3) are placed equidistantly on the top of the conveying belt (1), the bottle blank body (3) is moved to correspond to the position of the support frame (2), the supporting plate (51) is driven to insert the limiting column (55) into the bottle body through the bottle mouth, and when the first tooth disc (57) contacts the bottle mouth, the downward movement of the limiting column (55) is stopped; Second step: the positioning mechanism (4) positions the bottle blank body (3) and adjusts the position of the bottle blank body (3) again; Third step: after the above operation is completed, the limiting column (55) is continuously moved downward, the limiting assembly (58) is fixed to the bottle blank body (3) through the lower pressing plate (53), and at the same time, the polishing frame (56) is tightly attached to the spiral disc at the top of the bottle blank body (3), the bottle blank body (3) is synchronously rotated through the third rack (52), then the polishing frame (56) polishes the spiral disc at the top of the bottle blank body (3) in all directions, when the polishing frame (56) is located at the bottom of the spiral disc, the third rack (52) is reset, and in the process, the polishing frame (56) moves upward, thereby reciprocating.

2. A process for producing wear-resistant bottle preforms according to claim 1, characterized in that: The limiting assembly (58) includes a lower connecting plate (581), a driving rod (582), an anti-skid plate (583), an auxiliary rod (584), a fourth spring frame (585) and a circular ring frame (586), an accommodation groove is arranged in the limiting column (55), the lower connecting plate (581) is slidably connected in the accommodation groove, a horizontal plate is arranged on the outer side wall of the lower connecting plate (581), the horizontal plate extends to the outside of the limiting column (55) through the accommodation groove, the circular ring frame (586) is slidably arranged on the lower side of the outer side wall of the limiting column (55), two groups of auxiliary rods (584) are symmetrically arranged on the outer side wall of the limiting column (55) and below the circular ring frame (586), the number of the auxiliary rods (584) in each group is two, the anti-skid plate (583) is rotatably arranged at the end of each group of auxiliary rods (584) away from the limiting column (55), the driving rod (582) is arranged on the top of the anti-skid plate (583), the driving rod (582) is rotatably connected with the circular ring frame (586), and the fourth spring frame (585) is arranged on the bottom of the circular ring frame (586) and between the auxiliary rods (584) and surrounds the outer side wall of the limiting column (55).

3. A process for producing wear-resistant bottle preforms according to claim 1, characterized in that: The polishing frame (56) includes a first telescopic plate (561), an inclined plate (562), an inclined frame (563), a polishing plate (564), a vertical plate (565) and a fifth spring frame (566), the first telescopic plate (561) is arranged on the left end of the supporting frame (2), the first telescopic plate (561) includes an outer square sleeve and an inner square rod, the outer square sleeve is slidably connected with the inner square rod, the inclined frame (563) is arranged on the front surface of the inner square rod, the inclined plate (562) is slidably connected in the inclined frame (563), the top of the inclined plate (562) is fixedly connected with the supporting plate (51), the vertical plate (565) is arranged on the left end of the inner square rod, a long slot is arranged on the left end of the vertical plate (565), the polishing plate (564) is slidably connected in the long slot, and the fifth spring frame (566) is arranged between the bottom of the long slot and the bottom of the polishing plate (564).

4. A process for producing wear-resistant bottle preforms according to claim 1, characterized in that: The positioning mechanism (4) comprises a correction assembly (41), a push-down rod (42), a buffer assembly (43), a second rack (44), a meander plate (45), a second toothed disc (46), a round plate (47), a connecting plate (48) and a positioning frame (49), the meander plate (45) is installed below the left end of the support frame (2), two connecting plates (48) are symmetrically installed in the meander groove of the meander plate (45), the positioning frame (49) is installed on the top of the two connecting plates (48) in opposite positions, the round plate (47) is rotatably connected to the bottom of the meander plate (45), two external connecting rods (471) are symmetrically installed on the bottom of the round plate (47), the external connecting rods (471) are rotatably connected to the connecting plates (48) and the round plate (47) respectively, the second toothed disc (46) is installed on the bottom of the round plate (47), a square plate is installed on the bottom of the rear end face of the meander plate (45), the second rack (44) is slidably connected to the front end face of the square plate, the second rack (44) is in meshing transmission with the second toothed disc (46), the push-down rod (42) is installed on the left side of the second rack (44) through the buffer assembly (43), and the correction assembly (41) is installed above the push-down rod (42).

5. A process for producing wear-resistant bottle preforms according to claim 4, characterized in that: The correction assembly (41) comprises an upper push rod (411), a first rack (412) and a first spring frame (413), the first rack (412) is slidably installed in the slide plate on one side of the supporting plate (51), the first rack (412) is in meshing transmission with the first toothed disc (57), the second telescopic plate (571) is installed at the bottom of the first toothed disc (57), the first spring frame (413) is installed on the rear surface of the first rack (412), the right end of the first spring frame (413) is connected with the slide plate, and the upper push rod (411) is installed at the bottom of the first rack (412).

6. A process for producing wear-resistant bottle preforms according to claim 4, characterized in that: The buffer assembly (43) comprises a second spring frame (431) and a buffer rod (432), the buffer rod (432) is installed behind the second rack (44), and the push-down rod (42) and the second rack (44) slide left and right along the outer side wall of the buffer rod (432); the right end of the buffer rod (432) is fixedly connected with the square plate at the bottom of the meander plate (45), and the second spring frame (431) sleeved on the outer side wall of the buffer rod (432) is installed between the right end of the push-down rod (42) and the left end of the second rack (44).

7. A process for producing wear-resistant bottle preforms according to claim 4, characterized in that: The positioning frame (49) comprises a horizontal plate (491) and a screw rod (492), the screw rod (492) is installed on the top of the connecting plate (48), a plurality of horizontal plates (491) are threadedly connected in the screw rod (492), and a spherical ball is installed at one end of the horizontal plate (491).

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