CN111251579A

CN111251579A - Rear end processing device for hollow blow molding machine

Info

Publication number: CN111251579A
Application number: CN202010136241.4A
Authority: CN
Inventors: 冯建水
Original assignee: Hangzhou Puxin Plastic Packing Co ltd
Current assignee: Hangzhou Puxin Plastic Packing Co ltd
Priority date: 2020-03-02
Filing date: 2020-03-02
Publication date: 2020-06-09
Anticipated expiration: 2040-03-02
Also published as: CN111251579B

Abstract

The invention relates to a rear end processing device for a hollow blow molding machine, relating to the field of blow molding equipment. This scheme is including being used for carrying out undercutting mechanism, the transport mechanism of undercutting operation to the semi-manufactured goods plastic bottle that deposits in the region, be used for shifting the transport mechanism on the plastic bottle shifts transport mechanism in depositing the region, connect in the terminal bottle mouth mechanism that cuts of transport mechanism. The scheme can automatically remove the bottom of the plastic bottle produced by the blow molding machine and cut the bottle mouth, so that the labor intensity of workers is reduced, and the efficiency is improved.

Description

Rear end processing device for hollow blow molding machine

Technical Field

The invention relates to the field of blow molding equipment, in particular to a rear-end processing device for a hollow blow molding machine.

Background

Blow molding (blowmolding), also known as blow molding, is a rapidly developing plastic processing method. The method comprises the steps of extruding or injection molding thermoplastic resin through a die head to obtain a tubular plastic parison (see figure 1), performing split mold movement to two sides of the parison while the parison is hot, clamping the parison in the parison, closing the mold, then driving the parison to move to the lower part of a nozzle by the split mold, introducing compressed air into the parison through the nozzle to blow the plastic parison to cling to the inner wall of the mold, and cooling and demolding to obtain a hollow plastic semi-finished product.

Generally, in order to improve the processing efficiency, a clamping device is arranged on the split mold, as shown in fig. 1, the clamping device moves and clamps the split mold, when the split mold moves to the position below the mold head and is close to the clamping parison, two clamping plates of the clamping device synchronously move to the position below the nozzle and are close to the clamping parison; when the split mold transfers the parison under the nozzle, the two clamping plates simultaneously clamp the semifinished product into the storage area.

Due to the process limitation, the semi-finished plastic bottles produced by the existing automatic blow molding machine still have redundant bottom sheets and uneven bottle openings (see fig. 1), so that the semi-finished products in the storage area need to be taken out subsequently, and bottom removing operation and bottle opening cutting operation are performed.

Disclosure of Invention

The invention aims to provide a rear-end processing device for a blow molding machine, which can automatically perform bottom removing operation and bottle mouth cutting operation on plastic bottles produced by the blow molding machine so as to reduce the labor intensity of workers and improve the efficiency.

The above object of the present invention is achieved by the following technical solutions:

a rear-end processing device for a hollow blow molding machine comprises a bottom cutting mechanism, a conveying mechanism, a transfer mechanism and a bottle mouth cutting mechanism, wherein the bottom cutting mechanism is used for performing bottom cutting operation on semi-finished plastic bottles in a storage area; the bottom cutting mechanism comprises a bottom cutting rack, a bottom cutting knife arranged at the bottom of the storage area and a bottom cutting driving piece used for driving the bottom cutting knife to move transversely; the bottle mouth cutting mechanism comprises a conveying strip, a notch knife and a conveying belt, wherein the conveying strip is connected end to end, the movement track of the conveying strip is parallel to the horizontal plane, the notch knife is positioned on one side of the conveying strip, the conveying belt is formed between the conveying strip and the notch knife, and the conveying belt is positioned below the conveying channel.

By adopting the technical scheme, after the hollow blow molding machine processes out semi-finished plastic bottles and drives the semi-finished plastic bottles to the storage area, the bottom cutting mechanism can complete the bottom cutting operation of the plastic bottles, the plastic bottles which are subjected to the bottom cutting operation are transferred to the conveying belt of the conveying mechanism by the transfer mechanism and conveyed to the conveying belt, the conveying belt drives the plastic bottles to pass through the conveying channel, the bottle openings of the plastic bottles are tightly abutted between the conveying strip and the notch cutter, the plastic bottles move along the length direction of the conveying channel under the driving of the conveying strip, meanwhile, the plastic bottles rotate in the circumferential direction, and in the rotating process, the notch cutter cuts the bottle openings so as to cut off redundant and uneven upper bottle openings. Finally, the automatic bottom cutting operation and the automatic bottle mouth cutting operation of the semi-finished plastic bottles are completed, the labor intensity of workers is reduced, and the efficiency is improved.

More preferably, the method comprises the following steps: the conveying mechanism comprises a conveying belt and guard rods arranged on two sides of the conveying belt, a conveying channel is formed by the guard rods and the conveying belt together, the conveying channel comprises a conveying section and a screening section, the guard rods at the screening section are higher than the guard rods at the conveying section, and a discharge opening is formed in a gap between the guard rods at the screening section and the conveying belt; the conveyor mechanism further includes a force assist member for urging plastic bottles within the sifting section out of the discharge opening.

Through adopting above-mentioned technical scheme, because cut bottleneck mechanism can't realize cutting the bottleneck operation to the plastic bottle that overturns, and in this scheme, when the plastic bottle overturns on transfer passage and is driven to discharge opening department by the conveyer belt, the conveyer belt of discharge opening department can upwards jack up slightly to the helping hand spare to release the discharge opening with the plastic bottle that overturns, the plastic bottle that overturns can be sorted out in the aforesaid setting, thereby guarantee to advance to cut the plastic bottle in the bottleneck mechanism and can be vertical state, reduce final defective percentage.

More preferably, the method comprises the following steps: a receiving mechanism is arranged on one side of the conveying mechanism, the receiving mechanism comprises a receiving frame and a receiving track connected to the receiving frame, one end of the receiving track is received at the discharge opening, the receiving track comprises a receiving section and a first overturning section, and the first overturning section is located at one end, far away from the discharge opening, of the receiving section; a first receiving sheet is fixed on one side of the first turning section, which is close to the first receiving sheet, is rotatably connected to the receiving frame, the rotating axis of the first turning section is parallel to the length direction of the receiving track, and a first turning piece for driving the first turning section to turn is arranged on the receiving frame; the bearing frame is further provided with a conveying mesh belt, one side of the conveying channel is provided with a converging port, one end of the conveying mesh belt is communicated to the converging port, the first bearing sheet is arranged close to the conveying mesh belt, and the first overturning section is provided with a first pushing piece.

By adopting the technical scheme, after the plastic bottle rolls to the upper surface of the first overturning section, the first overturning part can drive the first overturning section to overturn for ninety degrees so as to enable the plastic bottle to overturn to be in an upright state, then the upright plastic bottle is slowly pushed onto the conveying mesh belt by the first pushing part, and the plastic bottle is driven by the conveying mesh belt to pass through the converging port and enter the conveying channel; therefore, the arrangement can automatically align the sorted overturned plastic bottles again and reset the overturned plastic bottles back to the conveying channel, thereby saving the manual resetting work.

More preferably, the method comprises the following steps: the receiving track further comprises a second overturning section, the second overturning section is arranged between the first overturning section and the receiving section, a second receiving sheet is fixed on one side, far away from the first receiving sheet, of the second overturning section, one side, close to the second receiving sheet, of the second overturning section is rotatably connected to the receiving frame, the rotating axis of the second overturning section is parallel to the length direction of the receiving track, a second overturning piece for driving the second overturning section to overturn is arranged on the receiving frame, the second receiving sheet is arranged close to the conveying net belt, and a second pushing piece is arranged on the second overturning section; the upper surface of the first overturning section is fixed with a blocking block, and the blocking block is positioned at the position, close to the second bearing sheet, of the first overturning section.

By adopting the technical scheme, because the orientations of the bottle mouths of the plastic bottles rolling out of the discharge port are different, the plastic bottles cannot be turned and straightened by only relying on the first turning section, so that in the scheme, the plastic bottles with the bottle mouths facing the second receiving sheet do not be influenced by the stop block when rolling into the receiving track, and move to the first turning section all the time, namely, the bottle mouths of the plastic bottles are finally positioned above the stop block, and the plastic bottles can be turned and straightened by the first turning section; when the bottleneck is rolling to accepting in the track towards the plastic bottle of first piece of accepting, the dog influence of being hindered, can be stopped by the stopper at the bottom of the bottle of plastic bottle, and the plastic bottle can only move to second upset section department, and this plastic bottle can be realized the upset by second upset section, ajusts.

More preferably, the method comprises the following steps: the inlet is located at the rear end of the discharge opening.

Through adopting above-mentioned technical scheme, the plastic bottle of empting can return in the transfer passage after receiving mechanism's upset is ajusted, and this plastic bottle still can select through the sieve of discharge opening again moreover to prevent that the plastic bottle from taking place to empty and missing the condition emergence of discharge opening screening in the way of returning, thereby reduce the quantity of the substandard product of the unfinished product of cutting the bottleneck operation.

More preferably, the method comprises the following steps: the transition piece is arranged at the gap between the conveying belt and the conveying belt, and the upper surface of the transition piece is flush with the upper surface of the conveying belt and the upper surface of the conveying belt.

Through adopting above-mentioned technical scheme, the transition piece can reduce the plastic bottle and take place the probability of empting when passing through conveyer belt and conveyer belt clearance to improve the stability of plastic bottle motion.

More preferably, the method comprises the following steps: when the plastic bottles are positioned in the conveying channel, the plastic bottles are not in contact with the upper surface of the conveying belt.

Through adopting above-mentioned technical scheme, the conveyer belt also can not hinder the circumferential direction of plastic bottle yet, and above-mentioned setting can improve the cutting stability of plastic bottle bottleneck promptly.

More preferably, the method comprises the following steps: and the tail end of the conveying channel is provided with an arc-shaped guide strip for guiding the cut bottle mouth in the direction away from the conveying belt.

By adopting the technical scheme, the bottle mouth is guided away from the finished plastic bottle after being cut off, so that the bottle mouth waste and the finished plastic bottle are prevented from being mixed together.

In conclusion, the beneficial technical effects of the invention are as follows:

1. the scheme can automatically perform bottom removing operation and bottle mouth cutting operation on the plastic bottles produced by the blow molding machine so as to reduce the labor intensity of workers and improve the efficiency;

2. in the scheme, the overturned plastic bottles can be automatically sorted out, so that the plastic bottles entering the bottle mouth cutting mechanism can be ensured to be in an upright state, and the final defective rate is reduced;

3. in the scheme, the sorted overturned plastic bottles can be automatically aligned again and reset back to the conveying channel, so that the manual reset work is saved.

Drawings

FIG. 1 is a schematic view of a prior art blow molding machine;

FIG. 2 is a schematic structural diagram of one embodiment of the present invention;

FIG. 3 is a schematic view of the undercutting mechanism of FIG. 2;

FIG. 4 is a schematic view of the transfer mechanism of FIG. 2;

FIG. 5 is a schematic view of the bottle mouth cutting mechanism of FIG. 2;

FIG. 6 is a schematic view of the transport mechanism and uptake mechanism of FIG. 2;

fig. 7 is a schematic view of a portion of the receiving mechanism of fig. 6.

In the figure, 1, a split mold; 11. a clamping device; 12. a die head; 121. a plastic parison; 13. a nozzle; 14. a plastic bottle; 2. a bottom cutting mechanism; 21. a bottom cutting frame; 22. a bottom cutter; 23. a bottom cutting driving member; 24. a storage rack; 3. a transfer mechanism; 31. a transfer rack; 32. a horizontal telescoping member; 33. transferring the clamping pieces; 4. a transport mechanism; 41. a conveyor belt; 42. a guard bar; 43. a transfer channel; 44. a transfer section; 45. screening and segmenting; 46. a discharge opening; 5. a bottle mouth cutting mechanism; 51. a conveying strip; 52. a notch plate; 521. a notching knife; 53. a conveyor belt; 54. a transition piece; 55. an arc-shaped guide strip; 6. a carrying mechanism; 61. a receiving frame; 62. carrying a track; 63. a receiving section; 64. a first turning section; 641. a first receiving piece; 642. a first pusher member; 65. a second turning section; 651. a second receiving piece; 652. a second pusher member; 66. a conveyor belt; 67. a blocking block; 68. and (6) converging to an inlet.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, the rear end processing device for the blow molding machine disclosed by the invention comprises a bottom cutting mechanism 2 for performing bottom cutting operation on semi-finished plastic bottles 14 in a storage area, a conveying mechanism 4, a transferring mechanism 3 for transferring the plastic bottles 14 in the storage area to the conveying mechanism 4, and a bottle opening cutting mechanism 5 connected to the tail end of the conveying mechanism 4.

Referring to fig. 2 and 3, the bottom cutting mechanism 2 is installed in the hollow blow molding machine and located at the bottom of the storage area, the bottom cutting mechanism 2 includes a bottom cutting frame 21, a bottom cutting knife 22 installed at the bottom of the storage area, and a bottom cutting driving member 23 for driving the bottom cutting knife 22 to move laterally, the bottom cutting driving member 23 is an air cylinder and is fixed on the bottom cutting frame 21, and the bottom cutting knife 22 is connected to a piston rod of the air cylinder; the bottom sheet at the bottom of the semi-finished plastic bottle 14 clamped by the clamping device 11 can be transversely cut off by the bottom cutting knife 22 under the driving of the bottom cutting driving piece 23, a storage rack 24 is further arranged in the storage area, the storage rack 24 is connected with the clamping device 11, the plastic bottle 14 brought by the clamping device 11 can be firstly placed on the storage rack 24, and then the bottom sheet is cut off by the bottom cutting knife 22.

Referring to fig. 4, the transferring mechanism 3 includes a transferring frame 31, a horizontal telescopic member 32 mounted on the transferring frame 31, and a transferring jaw 33 connected to the horizontal telescopic member 32, the horizontal telescopic member 32 is an electric cylinder, the transferring jaw 33 is provided with two pieces and mounted on a piston rod of the horizontal telescopic member 32, one transferring jaw 33 is fixed with an air cylinder, the other transferring jaw 33 is fixed on the piston rod of the air cylinder, and the air cylinder extends and retracts along a direction horizontal and perpendicular to the extending and retracting direction of the horizontal telescopic member 32; after the semi-finished plastic bottle 14 is completely bottomed, the horizontal telescopic member 32 drives the transfer jaws 33 to move transversely to the two sides of the plastic bottle 14, then the air cylinder drives one of the transfer jaws 33 to approach the other transfer jaw 33 so as to clamp the plastic bottle 14, and then the horizontal telescopic member 32 is reset so as to bring the plastic bottle 14 onto the conveying mechanism 4.

Referring to fig. 6, the conveying mechanism 4 includes a conveyor belt 41, and guard bars 42 provided on both sides of the conveyor belt 41, the guard bars 42 forming a conveying path 43 together with the conveyor belt 41.

Referring to fig. 5, the bottle mouth cutting mechanism 5 comprises a conveying strip 51, a mouth cutting plate 52, a mouth cutting knife 521 and a conveying belt 53, wherein the conveying strip 51 is connected end to end, the movement track of the conveying strip 51 is parallel to the horizontal plane, the mouth cutting plate 52 is positioned on one side of the conveying strip 51, the mouth cutting knife 521 is arranged on the mouth cutting plate 52, a conveying channel is formed between the conveying strip 51 and the mouth cutting plate 52, the conveying belt 53 is positioned below the conveying channel, and the mouth cutting knife 521 faces the conveying channel; the conveying channel 43 is connected between the transfer mechanism 3 and the bottle mouth cutting mechanism 5, a transition piece 54 (see fig. 6) is arranged at a gap between the conveying belt 41 and the conveying belt 53, the upper surface of the transition piece 54 is flush with the upper surface of the conveying belt 53 and is also flush with the upper surface of the conveying belt 41, and the transition piece 54 can reduce the probability of toppling over of the plastic bottles 14 when the plastic bottles 14 pass through the gap between the conveying belt 41 and the conveying belt 53, so that the movement stability of the plastic bottles 14 is improved.

Referring to fig. 2, after the blow molding machine processes the semi-finished plastic bottles 14 and drives the semi-finished plastic bottles 14 to the storage area, the bottom cutting mechanism 2 can complete the bottom cutting operation of the plastic bottles 14, and the transfer mechanism 3 transfers the plastic bottles 14 with the bottom cutting operation to the conveyor belt 41 of the transfer mechanism 4;

referring to fig. 5, the plastic bottle 14 is conveyed onto the conveying belt 53, the conveying belt 53 drives the plastic bottle 14 to pass through the conveying channel, the bottle mouth of the plastic bottle 14 is clamped between the conveying strip 51 and the notch plate 52, and moves along the length direction of the conveying channel under the driving of the conveying strip 51, and simultaneously rotates in the circumferential direction, and during the rotation, the notch knife 521 cuts the bottle mouth to cut off the redundant and uneven upper bottle mouth on the upper half; it should be noted that, when the plastic bottle 14 is located in the conveying channel, the mouth of the plastic bottle 14 is completely clamped between the conveying strip 51 and the cutting knife 521, the bottom of the plastic bottle 14 is not in contact with the upper surface of the conveying belt 53, and the conveying belt 53 does not interfere with the circumferential rotation of the plastic bottle 14, that is, the above arrangement can improve the cutting stability of the mouth of the plastic bottle 14. Moreover, the end of the conveying channel is provided with an arc-shaped guide strip 55, and the arc-shaped guide strip 55 is used for guiding the cut bottle mouth to the direction away from the conveying belt 53, so that the cut bottle mouth is guided away from the finished plastic bottle 14, and the bottle mouth waste is prevented from mixing with the finished plastic bottle 14.

Referring to fig. 6 and 7, the conveying channel 43 comprises a conveying section 44 and a sieving section 45, the conveying section 44 is close to the transfer mechanism 3, and the sieving section 45 is close to the bottle mouth cutting mechanism 5; the guard bar 42 at the screening section 45 is higher than the guard bar 42 at the conveying section 44, and the gap between the guard bar 42 at the screening section 45 and the conveyor belt 41 is a discharge opening 46; the conveying means 4 also comprise an aid (not shown in the figures) for pushing the plastic bottles 14 inside the sifting section 45 out of the discharge opening 46; the power assist member is block-shaped and lifts the conveyor belt 41 slightly upward. Because the bottle mouth cutting mechanism 5 cannot cut the bottle mouth of the overturned plastic bottle 14, in the scheme, when the plastic bottle 14 overturns on the conveying channel 43 and is driven to the discharge port 46 by the conveying belt 41, the boosting member can slightly jack up the conveying belt 41 at the discharge port 46 to push the overturned plastic bottle 14 out of the discharge port 46, and the overturned plastic bottle 14 can be sorted out by the arrangement, so that the plastic bottle 14 entering the bottle mouth cutting mechanism 5 can be in an upright state, and the final defective rate is reduced.

A receiving mechanism 6 is arranged on one side of the conveying mechanism 4, the receiving mechanism 6 comprises a receiving frame 61 and a receiving rail 62 connected to the receiving frame 61, one end of the receiving rail 62 is received at the discharge opening 46, the receiving rail 62 comprises a receiving section 63, a first turning section 64 and a second turning section 65, the first turning section 64 is positioned at one end of the receiving section 63 far away from the discharge opening 46, and the second turning section 65 is arranged between the first turning section 64 and the receiving section 63;

a first receiving sheet 641 is fixed on one side of the first turning section 64, the first receiving sheet 641 is perpendicular to the upper surface of the first turning section 64, one side of the first turning section 64 close to the first receiving sheet 641 is rotatably connected to the receiving frame 61, the rotation axis of the first turning section is parallel to the length direction of the receiving track 62, a first turning member for driving the first turning section 64 to turn is installed on the receiving frame 61, and the first turning member is a servo motor; the receiving frame 61 is further provided with a conveying mesh belt 66, one side of the conveying channel 43 is provided with a converging port 68, one end of the conveying mesh belt 66 is communicated to the converging port 68, and the first receiving sheet 641 is arranged close to the conveying mesh belt 66; the first turning section 64 is provided with a first pushing member 642, and the first pushing member 642 comprises an air cylinder and can push the plastic bottles 14 rolling to the upper surface of the first turning section 64 outwards;

after the plastic bottles 14 roll to the upper surface of the first turning section 64, the first turning member can drive the first turning section 64 to turn ninety degrees, so that the plastic bottles 14 are turned to be upright, and then the first pushing member 642 slowly pushes the upright plastic bottles 14 onto the conveyer mesh belt 66, and the conveyer mesh belt 66 drives the plastic bottles 14 to pass through the merging opening 68 and into the conveying channel 43.

A second receiving sheet 651 is fixed on one side of the second turning section 65 away from the first receiving sheet 641, one side of the second turning section 65 close to the second receiving sheet 651 is rotatably connected to the receiving frame 61, the rotation axis of the second turning section is parallel to the length direction of the receiving track 62, a second turning member for driving the second turning section 65 to turn is mounted on the receiving frame 61, the second turning member is a servo motor, the second receiving sheet 651 is arranged close to the conveying mesh belt 66, a second pushing member 652 is arranged on the second turning section 65, and the second pushing member 652 comprises an air cylinder and can push the plastic bottles 14 rolling to the upper surface of the second turning section 65 outwards; a stop block 67 is fixed on the upper surface of the first turning section 64, and the stop block 67 is positioned at the position, close to the second receiving piece 651, of the first turning section 64.

Because the bottle openings of the plastic bottles 14 rolled out of the discharge opening 46 are different in orientation, the plastic bottles 14 cannot be turned and straightened by the first turning section 64 alone, and therefore, in the scheme, when the plastic bottles 14 with the bottle openings facing the second receiving piece 651 roll into the receiving track 62, the plastic bottles move to the first turning section 64 without being influenced by the stop block 67, that is, the bottle openings of the plastic bottles 14 are finally located above the stop block 67, and the plastic bottles 14 can be turned and straightened by the first turning section 64; when the bottle 14 with its mouth facing the first receiving tab 641 rolls into the receiving track 62, the stopper 67 prevents the bottom of the bottle 14 from being blocked, the bottle 14 can only move to the second turning section 65, and the bottle 14 can be turned and aligned by the second turning section 65.

The merging port 68 is located at the front end of the discharge port 46, and through this arrangement, the dumped plastic bottles 14 can return to the conveying passage 43 after being turned and aligned by the receiving mechanism 6, and the plastic bottles 14 can also be sorted by the discharge port 46, so as to prevent the plastic bottles 14 from being dumped during the returning process and being mistakenly screened by the discharge port 46, thereby reducing the number of defective products which do not finish the bottle opening cutting operation.

The implementation principle of the embodiment is as follows: after the blow molding machine processes the semi-finished plastic bottles 14 and drives the semi-finished plastic bottles 14 to the storage area, the bottom cutting mechanism 2 can complete the bottom cutting operation of the plastic bottles 14, the plastic bottles 14 after the bottom cutting operation are transferred to the conveying belt 41 of the conveying mechanism 4 by the transfer mechanism 3 and conveyed onto the conveying belt 53, the conveying belt 53 drives the plastic bottles 14 to pass through the conveying channel, the bottle openings of the plastic bottles 14 are tightly abutted between the conveying strip 51 and the notch knife 521, and move along the length direction of the conveying channel under the driving of the conveying strip 51, and simultaneously rotate in the circumferential direction, and in the rotating process, the notch knife 521 cuts the bottle openings so as to cut off redundant and uneven upper bottle openings. Finally, the automatic bottom cutting operation and the automatic bottle mouth cutting operation of the semi-finished plastic bottles 14 are completed, the labor intensity of workers is reduced, and the efficiency is improved.

The conveyer belt 41 and the conveyer mesh belt 66 in the scheme adopt a structure of a mesh belt type conveyer belt 41 which can turn.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. A back end processing apparatus for a blow molding machine, characterized by: comprises a bottom cutting mechanism (2) for performing bottom cutting operation on semi-finished plastic bottles (14) in a storage area, a conveying mechanism (4), a transferring mechanism (3) for transferring the plastic bottles (14) in the storage area to the conveying mechanism (4), and a bottle mouth cutting mechanism (5) connected to the tail end of the conveying mechanism (4); the bottom cutting mechanism (2) comprises a bottom cutting rack (21), a bottom cutting knife (22) arranged at the bottom of the storage area, and a bottom cutting driving part (23) for driving the bottom cutting knife (22) to move transversely; the bottle mouth cutting mechanism (5) comprises a conveying strip (51) which is connected end to end and has a motion track parallel to the horizontal plane, a cutting knife (521) and a conveying belt (53) which are positioned on one side of the conveying strip (51), wherein a conveying channel is formed between the conveying strip (51) and the cutting knife (521), and the conveying belt (53) is positioned below the conveying channel.

2. A rear end processing device for an air blow molding machine according to claim 1, characterized in that: the conveying mechanism (4) comprises a conveying belt (41) and guard rods (42) arranged on two sides of the conveying belt (41), a conveying channel (43) is formed by the guard rods (42) and the conveying belt (41), the conveying channel (43) comprises a conveying section (44) and a screening section (45), the guard rods (42) at the screening section (45) are higher than the guard rods (42) at the conveying section (44), and a gap between the guard rods (42) at the screening section (45) and the conveying belt (41) is a discharge opening (46); the conveyor mechanism (4) further comprises a force assist for urging plastic bottles (14) in the sifting section (45) out of the discharge opening (46).

3. A rear end processing device for an air blow molding machine according to claim 2, characterized in that: one side of the conveying mechanism (4) is provided with a bearing mechanism (6), the bearing mechanism (6) comprises a bearing frame (61) and a bearing track (62) connected to the bearing frame (61), one end of the bearing track (62) is connected to the discharge opening (46), the bearing track (62) comprises a bearing section (63) and a first overturning section (64), and the first overturning section (64) is located at one end, far away from the discharge opening (46), of the bearing section (63); a first receiving sheet (641) is fixed on one side of the first overturning section (64), one side of the first overturning section (64) close to the first receiving sheet (641) is rotatably connected to the receiving frame (61), the rotating axis of the first overturning section is parallel to the length direction of the receiving track (62), and a first overturning piece for driving the first overturning section (64) to overturn is installed on the receiving frame (61); the bearing frame (61) is further provided with a conveying mesh belt (66), one side of the conveying channel (43) is provided with a converging port (68), one end of the conveying mesh belt (66) is communicated to the converging port (68), a first bearing sheet (641) is arranged close to the conveying mesh belt (66), and a first pushing piece (642) is arranged on the first overturning section (64).

4. A rear end processing device for an air blow molding machine according to claim 3, characterized in that: the bearing rail (62) further comprises a second overturning section (65), the second overturning section (65) is arranged between the first overturning section (64) and the bearing section (63), a second bearing sheet (651) is fixed on one side, far away from the first bearing sheet (641), of the second overturning section (65), one side, close to the second bearing sheet (651), of the second overturning section (65) is rotatably connected to the bearing frame (61), the rotating axis of the second overturning section is parallel to the length direction of the bearing rail (62), a second overturning piece for driving the second overturning section (65) to overturn is installed on the bearing frame (61), the second bearing sheet (651) is arranged close to the conveying mesh belt (66), and a second pushing piece (652) is arranged on the second overturning section (65); a blocking block (67) is fixed on the upper surface of the first overturning section (64), and the blocking block (67) is positioned at the position, close to the second bearing sheet (651), of the first overturning section (64).

5. A rear end processing device for an air blow molding machine according to claim 4, characterized in that: the intake opening (68) is located at the front end of the discharge opening (46).

6. A rear end processing device for an air blow molding machine according to claim 2, characterized in that: a transition piece (54) is arranged at a gap between the conveyor belt (41) and the conveyor belt (53), and the upper surface of the transition piece (54) is flush with the upper surface of the conveyor belt (53) and the upper surface of the conveyor belt (41).

7. A rear end processing device for an air blow molding machine according to claim 1, characterized in that: when the plastic bottles (14) are positioned in the conveying channel, the plastic bottles (14) are not contacted with the upper surface of the conveying belt (53).

8. A rear end processing device for an air blow molding machine according to claim 7, characterized in that: the tail end of the conveying channel is provided with an arc-shaped guide strip (55) used for guiding the cut bottle mouth in the direction away from the conveying belt (53).