CN218111690U - Bottle blowing mechanism of injection blowing machine - Google Patents

Abstract

The utility model relates to an annotate and blow quick-witted bottle blowing mechanism relates to annotate and blow quick-witted technical field, including the organism with set up the capstan head on the organism, be connected with a plurality of plug on the capstan head, each plug all includes barred body, core bar, core rod head and spring piece that resets. The locking device comprises a transmission assembly and a locking assembly, the locking assembly is connected with the spring resetting piece, one end of the transmission assembly is connected with a piston piece, a transmission groove for transmission of the transmission assembly is formed in the turret, a first sliding groove for sliding of the piston piece is formed in the turret, a first air duct and a second air duct are formed in the turret, the first air duct is located on one side, away from the locking device, of the piston piece, the second air duct is located on one side, close to the locking device, of the piston piece, the first air duct is communicated with the first sliding groove, and the second air duct is communicated with the transmission groove. This application has the effect that reduces the bottle and drop the probability in capstan head removal process.

Description

Bottle blowing mechanism of injection blowing machine

Technical Field

The application relates to the technical field of injection blow molding machines, in particular to a bottle blowing mechanism of an injection blow molding machine.

Background

The injection blow molding machine is used as important equipment in the field of blow molding, and comprises an injection molding mechanism, a bottle blowing mechanism and a bottle releasing mechanism. The working process of the injection blowing machine comprises the steps of firstly manufacturing a bottle blank by an injection molding mechanism, then blowing the bottle blank into a bottle body by a bottle blowing mechanism, and finally removing the bottle body by a bottle removing mechanism.

In the related art, there is a bottle blowing mechanism of an injection blow molding machine, and referring to fig. 1, the bottle blowing mechanism includes a turret 1 and a plurality of mandrels 2 arranged on the turret. A core rod 3 is arranged inside the core rod 2, and one end of the core rod 2 is inserted into the turret 1 and is fixedly connected with the turret 1. One end of the core bar 3 is positioned in the turret 1, and the other end of the core bar 3 is fixedly connected with a core bar head 4. A spring return piece 5 is arranged between the core bar 3 and the turret 1. One end of the core bar 3 positioned in the turret is connected with a piston piece 6, the piston piece 6 is in sliding connection and sealing fit with the turret 1, a first vent pipeline 11 is arranged between one side of the turret 1 and one side of the piston piece 6 close to the turret 1, and a second vent pipeline 12 is arranged between one side of the turret 1 far away from the piston piece 6 and the turret 1. When the device works, high-pressure gas is introduced into the first vent pipeline 11 positioned in the turret 1 to drive the piston piece 6 to displace, so that the core rod 3 is driven to move, and the core rod head 4 is separated from the core rod 2; and high-pressure gas is introduced into the second air duct 12, enters the bottle body through the gap between the mandrel head 4 and the mandrel 2 and blows off the bottle embryo, and the bottle embryo is filled and shaped into the bottle body. After forming, the second vent pipe 12 is not vented, and the gas in the bottle is discharged from the second vent pipe 12 through the separation of the mandrel head 4 and the mandrel 2.

In view of the above-mentioned related art, the inventor found that due to the existence of the spring return element, when the second air passage is no longer vented, the resultant force of the gas in the bottle body on the piston element and the elastic force of the spring return element is greater than the pressure of the high-pressure gas communicated by the first air passage on the piston element, so that the mandrel head is attached to the mandrel again to block the gas in the bottle from flowing out, thereby causing the bottle body to fall off during the movement of the turret in the case that the gas in the bottle body is not exhausted.

SUMMERY OF THE UTILITY MODEL

In order to reduce the probability that the core rod head is attached to the rod body when the gas in the bottle is not exhausted, the application provides a bottle blowing mechanism of an injection blowing machine.

The application provides a annotate and blow quick-witted bottle blowing mechanism adopts following technical scheme:

a bottle blowing mechanism of an injection blow molding machine comprises a machine body and a turret arranged on the machine body, wherein a plurality of core rods are connected onto the turret, each core rod comprises a rod body, a core rod and a core rod head, one end of the rod body is fixedly connected with the turret, the core rod is connected with the rod body in a sliding mode, one end of the core rod is located in the rod body, and the other end of the core rod extends out of the rod body and is connected with one end of the core rod head. The core rod further comprises a spring resetting piece, one end, located in the rod body, of the core rod is connected with the spring resetting piece, one end, far away from the core rod, of the spring resetting piece is connected with a locking device, the locking device comprises a transmission assembly and a locking assembly, one end, close to the core rod, of the transmission assembly is connected with the locking assembly, one end, close to the spring resetting piece, of the locking assembly is connected with the spring resetting piece, one end, far away from the locking assembly, of the transmission assembly is connected with a piston piece, a transmission groove for transmission of the transmission assembly is formed in the turret, a first sliding groove for sliding of the piston piece is formed in the turret, a first ventilation pipeline and a second ventilation pipeline are formed in the turret, the first ventilation pipeline is located on one side, far away from the locking device, of the piston piece, the second ventilation pipeline is located on one side, close to the locking device, of the piston piece, the first ventilation pipeline is communicated with the first sliding groove, and the second ventilation pipeline is communicated with the transmission groove. The locking device is used for locking the core rod when the second air passage stops ventilating.

Through adopting above-mentioned technical scheme, to locking device's setting, thereby ventilate at first breather pipe and promote the in-process that the piston spare made core bar and core rod head to remove, locking device's drive assembly will be along the removal of core bar axis direction and change into multiple transmission to make locking device's locking assembly can adjust to a suitable locking position, carry out the self-locking. The locking device is fixed with the core rod, so that the core rod is driven to be locked and fixed, and a gap between the core rod head and the rod body is kept. The locking device reduces the degree of adverse influence of the elastic force of the spring reset piece on the gap between the mandrel head and the rod body when the second air passage is not ventilated any more, thereby prolonging the time of the gap between the mandrel head and the rod body and further reducing the probability of falling off of the bottle body in the moving process of the turret after the upper blow molding die and the lower blow molding die are demolded.

Preferably, the transmission assembly includes a connecting block, a plurality of sliding blocks, a rotating drum and a plurality of first rotating blocks, one surface of the connecting block close to the piston is connected to the piston, a side wall of the connecting block is connected to the sliding blocks, the connecting block is sleeved in the rotating drum, a plurality of second sliding grooves for the sliding blocks to slide are formed in an inner wall of the rotating drum, the side wall of the rotating drum is connected to the first rotating blocks, the first rotating blocks are located at one end of the rotating drum close to the core bar, a plurality of rotating grooves for the first rotating blocks to rotate are formed in the rotating drum, a third sliding groove for the first rotating blocks to slide is formed in the rotating drum, and the third sliding grooves are communicated with the corresponding rotating grooves.

Through adopting above-mentioned technical scheme, to the concrete setting of transmission subassembly for thereby ventilate at first breather pipe and promote the in-process that the piston spare made core bar and mandrel head to remove, the motion trail of rotary drum is changed into the mode that rotates and remove to combine together by simple rectilinear movement, thereby drives the locking subassembly to the position that is fit for the locking, has increased the efficiency of locking effectively, thereby the time that the space exists between extension mandrel head and the barred body.

Preferably, the locking assembly includes a connecting ring, a locking ring, a second rotating block, and a third vent pipe, one surface of the drum close to the spring return member is fixedly connected to one surface of the connecting ring, the connecting ring is rotatably connected to the spring return member, the locking ring is sleeved outside the connecting ring, the locking ring is rotatably connected to the connecting ring, a side wall of the locking ring is connected to the second rotating block, the second rotating block corresponds to one of the first rotating blocks, the rotating groove is used for allowing the first rotating block and the second rotating block to rotate simultaneously, the third sliding groove is used for allowing the first rotating block and the second rotating block to slide simultaneously, a locking groove for allowing the second rotating block to rotate is formed in the turret, the locking groove is communicated with the third sliding groove, a third vent pipe is formed in the turret, one end of the third vent pipe is communicated with the first sliding groove, and the other end of the third vent pipe is communicated with one end of the locking groove.

Through adopting above-mentioned technical scheme, to the setting of locking subassembly for the second turning block is when getting into the locking groove, and it is fixed to rotate the back with the second turning block through the high-pressure gas in the first breather pipe way, thereby has realized the locking to locking device, has further realized the locking to the core bar. Due to the arrangement of the locking assembly, the time of existence of a gap between the mandrel head and the mandrel body is prolonged, and the probability that the bottle body falls off in the moving process of the turret after the upper blow mold and the lower blow mold are demolded is further reduced.

Preferably, the locking ring is internally provided with a placing ring groove, the placing ring groove is internally provided with a torsion spring, the torsion spring is sleeved on the connecting ring, one end of the torsion spring is connected with the connecting ring, and the other end of the torsion spring is connected with the locking ring.

Through adopting above-mentioned technical scheme, the back is no longer ventilated at the high-pressure gas discharge in the bottle and first breather pipe, because the existence of torsion spring elasticity for the lock ring gyration, first turning block pastes with first sliding block mutually, and under the existence of spring reset piece elasticity, it slides to get into the third sliding groove, progressively restores to the initial position.

Preferably, an air outlet pipeline is arranged in the turret, one end of the air outlet pipeline is communicated with the outside air, and the other end of the air outlet pipeline is communicated with one end, far away from the third vent pipeline, of the locking groove.

Through adopting above-mentioned technical scheme for high-pressure gas lets in the locking groove back from first breather pipe, from the pipeline of giving vent to anger and discharges. The setting of breather pipe has effectively reduced the resistance of high-pressure gas in the locking groove to the drive assembly removal in-process, has increased the driven efficiency of drive assembly to the driven effect of drive assembly has been increased.

Preferably, a plurality of block placing grooves are formed in the turret, the block placing grooves are located at one end, close to the block placing grooves, of the third sliding groove, the block placing grooves are communicated with the third sliding groove, magnetic blocks are embedded in the block placing grooves, and the magnetic blocks can be magnetically attracted with the second rotating blocks.

Through adopting above-mentioned technical scheme, it is terminal that first rotation piece is in the third groove that slides, and the second rotation piece removes the in-process in locking groove, and the magnetic attraction of magnetic block to first rotation piece has effectively reduced by the hindrance influence of locking inslot high-pressure gas to the motion of second rotation piece to the driven efficiency of transmission assembly has been increased, thereby has increased the driven effect of transmission assembly.

Preferably, a first sealing ring is sleeved on the side surface of the rotary drum, and a second sealing ring is sleeved on the side surface of the locking ring.

Through adopting above-mentioned technical scheme, to the settlement of sealing washer, effectively reduced the probability that high-pressure gas got into the transmission groove in the first air channel, increased the driven efficiency of transmission assembly, thereby reduced because atmospheric pressure is not enough and lead to the locking ring to rotate the probability that the failure leads to the core bar locking.

Preferably, the connecting block is provided with a plurality of vent grooves, and each vent groove is a through groove.

Through adopting above-mentioned technical scheme, the existence of air channel makes the high-pressure gas via second vent pipe to the drive groove in can good circulation, has increased the efficiency of blowing, has also reduced the resistance of high-pressure gas to the connecting block simultaneously, has increased transmission efficiency.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by arranging the locking device, the time of the gap between the mandrel head and the mandrel body is prolonged, and the probability that the bottle body falls off in the moving process of the turret after the upper blow molding die and the lower blow molding die are demolded is further reduced;

2. through the arrangement of the torsion spring, the core rod and the core rod head can return to the initial position after the air exhaust is finished;

3. through the arrangement of the air outlet pipeline and the magnetic block, the resistance borne by the transmission assembly is reduced, and the transmission efficiency of the transmission assembly is increased, so that the transmission effect of the transmission assembly is increased;

4. through the arrangement of the first sealing ring and the second sealing ring, the sealing performance between the turret and the locking device is improved, and meanwhile, the transmission efficiency is also improved.

Drawings

Fig. 1 is a block diagram for embodying an overall structure in the related art.

Fig. 2 is a structural view for embodying a core rod structure in the related art.

Fig. 3 is a schematic structural diagram for embodying a bottle blowing mechanism of an injection blowing machine in the embodiment of the present application.

Fig. 4 is a partially enlarged view of a portion a in fig. 3.

Fig. 5 is a schematic structural diagram for embodying a turret in the embodiment of the present application.

Fig. 6 is a schematic structural diagram for embodying the core rod in the embodiment of the present application.

Fig. 7 is a partially enlarged view of a portion B in fig. 6.

Fig. 8 is a schematic structural diagram for embodying the outlet pipe in the embodiment of the present application.

Fig. 9 is a partially enlarged view of a portion C in fig. 8.

Description of reference numerals: 1. a body; 11. a driving cylinder; 2. a bottle blowing device; 21. a lower blow mold; 211. stretching the cavity; 22. an upper blow mold; 23. a turret; 231. a transmission groove; 232. a first sliding groove; 233. a rotating groove; 234. a third sliding groove; 235. a first vent conduit; 236. a second vent conduit; 237. a locking groove; 238. an air outlet pipe; 239. a block placing groove; 3. a core rod; 31. a rod body; 32. a core bar; 33. a mandrel head; 34. a spring return; 4. a locking device; 41. a transmission assembly; 411. connecting blocks; 4111. a vent channel; 412. a sliding block; 413. a rotating drum; 4131. a second sliding groove; 414. a first rotating block; 42. a locking assembly; 421. a connecting ring; 422. a lock ring; 4221. placing a ring groove; 423. a second turning block; 424. a third vent conduit; 5. a piston member; 6. A first seal ring; 7. a second seal ring; 8. a torsion spring; 9. a magnetic block.

Detailed Description

The present application is described in further detail below with reference to figures 3-9.

The embodiment of the application discloses a bottle blowing mechanism of an injection blowing machine. Referring to fig. 3 and 4, the bottle blowing mechanism of the injection blowing machine includes a machine body 1 and a bottle blowing device 2 disposed on the machine body 1, the bottle blowing device 2 includes a lower blow mold 21 disposed on the machine body 1, an upper blow mold 22 located right above the lower blow mold 21, and a turret 23 disposed on the machine body 1, a bottom wall of the lower blow mold 21 is fixedly connected with the machine body 1, and a plurality of stretching cavities 211 are formed in an upper surface of the lower blow mold 21. Organism 1 is including driving actuating cylinder 11, drives actuating cylinder 11 piston rod and is located the outer one end of cylinder and the roof fixed connection of last injection mould, drives actuating cylinder 11 cylinder body and keeps away from the one end and organism 1 fixed connection of piston rod.

Referring to fig. 5 and 6, a group of core rods 3 is connected to three side walls of the turret 23, each group of core rods 3 is four, each core rod 3 includes a rod body 31, a core rod 32, a core rod head 33 and a spring return member 34, one end of the rod body 31 is fixedly connected to a side wall of the turret 23, the core rod 32 is sleeved in the rod body 31 and slidably connected, and the core rod 32 and the rod body 31 are coaxially arranged. The end of the core rod 32 remote from the turret 23 extends outside the rod body 31 and is fixedly connected to a core rod head 33. One end of the core bar 32 located in the rod body 31 is fixedly connected with the spring return piece 34, one end of the spring return piece 34 away from the core bar 32 is connected with the locking device 4, and the locking device 4 comprises a transmission assembly 41 and a locking assembly 42.

Referring to fig. 6 and 7, a driving groove 231 for driving the driving assembly 41 is formed inside the turret 23. The transmission assembly 41 includes a connecting block 411, two sliding blocks 412, a drum 413, and two first rotating blocks 414. The connecting block 411 is a cylindrical block, and the connecting block 411 is arranged coaxially with the core rod 32. One side of connecting block 411 is opened with round vent groove 4111, and each vent groove 4111 is a through groove. The side wall of the connecting block 411 is fixedly connected with two sliding blocks 412 by welding, preferably, the two sliding blocks 412 are cylindrical blocks to reduce the friction between the rotating drum 413 and the sliding blocks 412, and the two sliding blocks 412 form a straight angle around the axis of the connecting block 411. The piston member 5 is connected to one side of the connecting block 411, which is away from the spring return member 34, a first sliding groove 232 for sliding the piston member 5 is formed in the turret 23, a first air duct 235 is formed in the turret 23, the first air duct 235 is located on one side of the piston member 5, which is away from the drum 413, the first air duct 235 is communicated with the first sliding groove 232, and high-pressure air communicated by the first air duct 235 is used for pushing the piston member 5 to move.

Referring to fig. 6 and 7, the side wall of the transmission groove 231 is engaged with the rotating drum 413, the rotating drum 413 can rotate and slide in the transmission groove 231, the connecting block 411 is sleeved in the rotating drum 413, and the connecting block 411 and the rotating drum 413 are coaxially arranged. The drum 413 is provided with two second sliding grooves 4131 for the sliding blocks 412 to slide, the second sliding grooves 4131 are spiral grooves, and the second sliding grooves 4131 correspond to the sliding blocks 412 one by one. The presence of the second sliding groove 4131 and the sliding block 412 enables the movement of the connection block 411 to be changed to rotation by the movement of the drum 413 being changed by the second sliding groove 4131.

Referring to fig. 7 and 8, the side wall of the drum 413 is connected by welding to two first rotation blocks 414, the two first rotation blocks 414 being at a straight angle around the axis of the drum 413. Two rotating grooves 233 for the first rotating blocks 414 to rotate are formed in the turret 23, the rotating grooves 233 correspond to the first rotating blocks 414 one by one, and the rotating grooves 233 are arc grooves. Two third sliding grooves 234 for sliding the first rotating blocks 414 are formed in the turret 23, and the third sliding grooves 234 communicate with the corresponding rotating grooves 233. A second air duct 236 is formed in the turret 23, the second air duct 236 is located on a side of the piston member 5 close to the locking device 4, and the second air duct 236 is communicated with the transmission groove 231. The drum 413 is externally fitted with a first sealing ring 6 to increase the sealing performance. During the movement of the connecting block 411 along its axis and in a direction away from the piston member 5, when the first rotating block 414 rotates in the rotating groove 233, the rotating cylinder 413 rotates along its axis, and the sliding block 412 slides along the first sliding groove 232, and when the sliding block 412 reaches an end of the second sliding groove 4131, the first rotating block 414 leaves the rotating groove 233 and enters the third sliding groove 234, and at this time, the connecting block 411 drives the rotating cylinder 413 to displace, and the first rotating block 414 slides in the third sliding groove 234.

Referring to fig. 7 and 8, the locking assembly 42 includes a connection ring 421, a locking ring 422, a second rotation block 423, and a third air passage 424. One surface of the connecting ring 421 far away from the spring return element 34 is fixedly connected with one end of the drum 413 close to the core bar 32 by welding, and the connecting ring 421 close to the spring return element 34 is rotatably connected with the spring return element 34 by a bearing. Preferably, the locking ring 422 is a multi-segment ring, the outer diameters of the multi-segment ring are equal, and the connecting ring 421 is sleeved in the locking ring 422. The second rotating block 423 is fixedly connected with the side wall of the locking ring 422 by welding, the second rotating block 423 corresponds to the first rotating block 414, the rotating groove 233 is used for allowing the first rotating block 414 and the second rotating block 423 to rotate simultaneously, the third sliding groove 234 is used for allowing the first rotating block 414 and the second rotating block 423 to slide simultaneously, a locking groove 237 used for allowing the second rotating block 423 to rotate is formed in the turret 23, the locking groove 237 is an arc groove, and the locking groove 237 is communicated with the third sliding groove 234. The side wall of the locking ring 422 is sleeved with a second sealing ring 7 to increase the sealing performance between the locking ring 422 and the turret 23. One end of the third air passage 424 is communicated with the first sliding groove 232, and the other end of the third air passage 424 is communicated with one end of the locking groove.

Referring to fig. 7 and 8, an air outlet pipe 238 is formed in the turret 23, one end of the air outlet pipe 238 communicates with the outside air, and the other end of the air outlet pipe 238 communicates with one end of the locking groove 237 away from the third air outlet pipe 424. The arrangement of the air duct 238 can effectively reduce the resistance of the high-pressure air in the locking groove 237 to the movement process of the transmission assembly 41, and increase the transmission efficiency of the transmission assembly 41. An annular groove 4221 is formed in the locking ring 422, a torsion spring 8 is arranged in the annular groove 4221, the torsion spring 8 is sleeved on the connecting ring 421, one end of the torsion spring 8 is fixedly connected with the connecting ring 421, and the other end of the torsion spring 8 is fixedly connected with the locking ring 422. The presence of the torsion spring 8 may cause the locking ring 422 to swivel when the first vent conduit 235 is no longer vented.

Referring to fig. 9, two block placing grooves 239 are formed in the turret 23, the block placing grooves 239 are located at one end of the third sliding groove close to the locking groove 237, the block placing grooves 239 are communicated with the third sliding groove 234, the magnetic blocks 9 are embedded in the block placing grooves 239, and when the second rotating blocks 423 enter the third sliding groove 234, the magnetic blocks 9 are attached to the second rotating blocks 423 and magnetically attracted. The magnetic block 9 reduces the obstruction effect of the high-pressure gas in the locking groove 237 on the movement of the second rotating block 423, and increases the transmission efficiency of the transmission assembly 41

The implementation principle of the bottle blowing mechanism of the injection blowing machine in the embodiment of the application is as follows: in use, when the upper and lower blow molds 22 and 21 are closed, the first ventilation pipe 235 is filled with high-pressure gas, the high-pressure gas pushes the piston member 5 against the resistance of the spring return member 34, and the piston member 5 moves in the first sliding groove 232 in the direction away from the turret 23 along the axial direction of the core rod 32. At this time, the connecting block 411 is displaced, the first rotating block 414 and the second rotating block 423 cannot be displaced due to the first rotating groove 233, the drum 413 itself can only rotate around the axis of the drum 413 due to the second sliding groove 4131, when the sliding block 412 reaches the end of the second sliding groove 4131, the first rotating block 414 and the second rotating block 423 rotate out of the first rotating groove 233 into the third sliding groove 234 communicating with the first rotating groove 233, and the connecting block 411 moves together against the inner wall of the drum 413. When the piston member 5 reaches the end of the first sliding groove 232, the first rotating block 414 is attached to the magnetic block 9 and magnetically attracted thereto, and the second rotating block 423 enters the locking groove 237. At this time, a gap is formed between the mandrel head 33 and the rod body 31, the high-pressure gas in the first sliding groove 232 enters the locking groove 237 through the third vent pipe 424, and the high-pressure gas in the locking groove 237 pushes the second rotating block 423 to rotate to the other end of the locking groove 237, so that the mandrel head 33 is locked. After locking, the second vent pipe 236 is filled with high pressure gas, and the high pressure gas enters the gap between the rod body 31 and the core rod 32 through the transmission groove 231 and then flows out from the gap between the rod body 31 and the head of the core rod 3 to blow up the bottle blank. After the bottle body is manufactured, the second air duct 236 is not ventilated, air in the bottle body enters the second air duct 236 through the gap between the rod body 31 and the core rod 32 to be exhausted, the second rotating block 423 is not rotated any more due to the pressure of high-pressure air on the second rotating block 423, the elastic force of the spring return piece 34 is born by the rotary tower 23, and the gap between the core rod head 33 and the rod body 31 is continuously existed. After the gas in the bottle is exhausted, the first vent groove 4111 is no longer vented, and due to the existence of the torsion spring 8, the locking ring 422 rotates, the elastic force of the spring resetting piece 34 drives the core rod 32 to move back, and the rod body 31 is attached to the core rod head 33 again.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides an annotate and blow quick-witted bottle blowing mechanism, includes organism (1) and sets up capstan head (23) on organism (1), be connected with a plurality of plug (3) on capstan head (23), each plug (3) all include barred body (31), core bar (32) and core rod head (33), the one end of barred body (31) with capstan head (23) fixed connection, core bar (32) with barred body (31) sliding connection, the one end of core bar (32) is located in barred body (31), the other end of core bar (32) stretches out barred body (31) and is connected with the one end of core rod head (33), its characterized in that: the mandrel (3) further comprises a spring resetting piece (34), one end, located in the mandrel body (31), of the mandrel (32) is connected with the spring resetting piece (34), one end, located away from the mandrel (32), of the spring resetting piece (34) is connected with a locking device (4), the locking device (4) comprises a transmission assembly (41) and a locking assembly (42), one end, close to the mandrel (32), of the transmission assembly (41) is connected with the locking assembly (42), one end, close to the spring resetting piece (34), of the locking assembly (42) is connected with the spring resetting piece (34), one end, far away from the locking assembly (42), of the transmission assembly (41) is connected with a piston piece (5), a transmission groove (231) for transmission of the transmission assembly (41) is formed in the turret (23), a first sliding groove (232) for sliding of the piston piece (5) is formed in the turret (23), a first ventilation pipeline (235) and a second ventilation pipeline (236) are formed in the turret (23), the first ventilation pipeline (235) is located on one side, away from the locking device (4), and is located close to the second ventilation pipe (236), the first air duct (235) is communicated with the first sliding groove (232), and the second air duct (236) is communicated with the transmission groove (231); the locking device (4) is used for locking the core rod (32) when the second air passage (236) stops ventilating.

2. The bottle blowing mechanism of the injection blow molding machine according to claim 1, characterized in that: the transmission assembly (41) comprises a connecting block (411), a plurality of sliding blocks (412), a rotating drum (413) and a plurality of first rotating blocks (414), one surface, close to the piston member (5), of the connecting block (411) is connected with the piston member (5), the side wall of the connecting block (411) is connected with the sliding blocks (412), the connecting block (411) is sleeved in the rotating drum (413), the inner wall of the rotating drum (413) is provided with a plurality of second sliding grooves (4131) for the sliding blocks (412) to slide, the side wall of the rotating drum (413) is connected with the first rotating blocks (414), the first rotating blocks (414) are located at one end, close to the core rod (32), of the rotating drum (413), a plurality of rotating grooves (233) for the first rotating blocks (414) to rotate are formed in the rotating drum (23), third sliding grooves (234) for the sliding blocks (414) to slide are formed in the rotating drum (23), and the third sliding grooves (234) are communicated with the corresponding rotating grooves (233).

3. The bottle blowing mechanism of the injection blowing machine according to claim 2, characterized in that: the locking assembly (42) comprises a connecting ring (421), a locking ring (422), a second rotating block (423) and a third air passage (424), the rotary drum (413) is close to one surface of the spring resetting piece (34) and one surface of the connecting ring (421) are fixedly connected, the connecting ring (421) is rotatably connected with the spring resetting piece (34), the locking ring (422) is sleeved outside the connecting ring (421), the locking ring (422) is rotatably connected with the connecting ring (421), the side wall of the locking ring (422) is connected with the second rotating block (423), the second rotating block (423) corresponds to the first rotating block (414), the rotating groove (233) can be used for enabling the first rotating block (414) and the second rotating block (423) to rotate simultaneously, the third sliding groove (234) can be used for enabling the first rotating block (414) and the second rotating block (423) to slide simultaneously, the inside of the turret (23) is provided with a locking groove (237) used for enabling the second rotating block (423) to rotate, the locking groove (237) is communicated with the third sliding groove (234), the turret (23) is internally provided with a third air pipeline (424), one end of the third air pipeline (424) is communicated with the first sliding groove (232), and the other end of the third air pipeline (424) is communicated with the locking groove (237) One end is communicated with each other.

4. The bottle blowing mechanism of the injection blow molding machine according to claim 3, characterized in that: set up in lock ring (422) and place annular (4221), be provided with torsion spring (8) in placing annular (4221), torsion spring (8) cover is located on go-between (421), the one end of torsion spring (8) with go-between (421) are connected, the other end of torsion spring (8) with lock ring (422) are connected.

5. The bottle blowing mechanism of the injection blow molding machine according to claim 4, characterized in that: an air outlet pipeline (238) is arranged in the turret (23), one end of the air outlet pipeline (238) is communicated with the outside air, and the other end of the air outlet pipeline (238) is communicated with one end, away from the third ventilation pipeline (424), of the locking groove (237).

6. The bottle blowing mechanism of the injection blow molding machine according to claim 3, characterized in that: a plurality of block placing grooves (239) are formed in the turret (23), the block placing grooves (239) are located at one ends, close to the block placing grooves (239), of the third sliding grooves (234), the block placing grooves (239) are communicated with the third sliding grooves (234), magnetic blocks (9) are embedded in the block placing grooves (239), and the magnetic blocks (9) can be magnetically attracted to the second rotating blocks (423).

7. The bottle blowing mechanism of the injection blowing machine according to claim 3, characterized in that: the side of the rotary drum (413) is sleeved with a first sealing ring (6), and the side of the locking ring (422) is sleeved with a second sealing ring (7).

8. The bottle blowing mechanism of the injection blow molding machine according to claim 3, characterized in that: the connecting block (411) is provided with a plurality of vent grooves (4111), and each vent groove (4111) is a through groove.

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