CN113021846A

CN113021846A - Straw blow molding mold convenient for demolding and control method

Info

Publication number: CN113021846A
Application number: CN202110307676.5A
Authority: CN
Inventors: 张江华
Original assignee: Yuhuan Chugang Mould Technology Co ltd
Current assignee: Yuhuan Chugang Mould Technology Co ltd
Priority date: 2021-03-23
Filing date: 2021-03-23
Publication date: 2021-06-25

Abstract

The invention discloses a suction tube blow molding mold convenient for demolding, which has the technical scheme that the suction tube blow molding mold comprises a blow molding machine body and a demolding mechanism, wherein the demolding mechanism further comprises a clamping mechanism, and the waste materials after being punched are clamped and taken down from the mold for demolding; the moving mechanism enables the clamping mechanism to move in a reciprocating manner to separate the waste from the blanking position of the suction pipe; the moving mechanism and the clamping mechanism are arranged on the blow molding machine body through the first mounting seat; the adjusting mechanism is arranged between the first mounting seat and the moving mechanism and used for adjusting the height of the moving mechanism, the moving mechanism comprises a second mounting seat, a rodless cylinder arranged on the second mounting seat, a sliding rail arranged on the second mounting seat and parallel to the axis of the rodless cylinder, and a first sliding block matched with the sliding rail, and the straw blow molding die convenient to adjust, separate a semi-finished straw product from waste materials and achieve vibration reduction and buffering and convenient to demold is provided.

Description

Straw blow molding mold convenient for demolding and control method

Technical Field

The invention belongs to the technical field of thermoplastic molding, and particularly relates to a straw blow molding mold convenient for demolding and a control method.

Background

The Pasteur pipette is used for sucking, transferring or carrying a small amount of liquid in cell tests, clinical tests, clone tests and the like. The tube body of the pasteur pipette is provided with a hollow bag which can facilitate the mixing of the solvent, the medicament, the cell body and the like. The tube body is semitransparent and bright white, and the tube wall has ideal liquid fluidity and strong controllability; can be used in liquid nitrogen environment; the tube body is fine and soft and can be bent, and the micro or special container can be conveniently accessed; the small suction head can ensure the repeatability of the dropping amount; the tube end can be heat sealed, which is convenient for carrying liquid. The pasteur pipette is manufactured by adopting blow molding extrusion molding, namely, a tube blank is extruded by an extruder, the tube blank is clamped to a blow molding die by a mechanical arm, an upper die and a lower die are matched to clamp the tube blank and blow air in the tube blank so that the tube blank is tightly attached to a die cavity of the die to be cooled and molded into a pasteur pipette semi-finished product.

The prior Chinese patent with publication number CN202727327U discloses a blowing mold of a pasteur pipette, wherein an air inlet cavity and a pipette cavity are arranged on the mold, a blank cutting opening and a residual material groove are arranged around the cavity, a small suction head part of the pipette cavity is communicated with the air inlet cavity, a blade is inserted at the joint of the small suction head part of the pipette cavity and the air inlet cavity, and the blade is driven by a driving mechanism arranged on the mold to enter and exit the joint of the small suction head part of the pipette cavity and the air inlet cavity. According to the technical scheme, the connecting part of the suction pipe and the air port part is directly cut off by the mold during blow molding and demolding, and the suction pipe is torn off from a semi-finished product of the Pasteur suction pipe only by manpower.

Above-mentioned blow mold cuts off straw and gas port portion through the blade, but during straw and gas port portion can fall same blanking frame during the drawing of patterns, increased the manual sorting process in later stage, increased the processing cost.

Disclosure of Invention

The invention aims to solve the technical problems and provide a straw blow mold which is convenient to adjust, separates a straw semi-finished product from waste materials and has vibration damping and buffering functions.

The purpose of the invention is realized as follows: a straw blow molding mold convenient for demolding comprises a blow molding machine body and a demolding mechanism, wherein the demolding mechanism further comprises a clamping mechanism, and the clamping mechanism is used for clamping punched waste materials to take down the die from the mold for demolding; the moving mechanism enables the clamping mechanism to move in a reciprocating manner to separate the waste from the blanking position of the suction pipe; the moving mechanism and the clamping mechanism are arranged on the blow molding machine body through the first mounting seat; the adjusting mechanism is arranged between the first mounting seat and the moving mechanism and used for adjusting the height of the moving mechanism, and the moving mechanism comprises a second mounting seat, a rodless cylinder arranged on the second mounting seat, a sliding rail arranged on the second mounting seat and parallel to the axis of the rodless cylinder, and a first sliding block matched with the sliding rail.

The invention is further configured to: the clamping mechanism comprises a third mounting seat, a connecting seat, a cylinder clamping jaw and a clamping piece fixedly connected with two sides of the cylinder clamping jaw in an arranging mode, the clamping piece is cuboid, one end of the connecting seat is fixedly connected onto the third mounting seat, the other end of the connecting seat is fixedly connected with the cylinder clamping jaw, and the third mounting seat is fixedly connected with the first sliding block.

The invention is further configured to: adjustment mechanism is including linking firmly the uide bushing on first mount pad, linking firmly the guide bar on the second mount pad, linking firmly the threaded rod on the second mount pad, arranging the adjusting nut on the threaded rod in, be equipped with the regulation hole on the first mount pad, the threaded rod runs through the regulation hole, the threaded rod is equipped with first lock nut and second lock nut, one side of regulation hole is arranged in to adjusting nut, the opposite side of regulation hole is arranged in to first lock nut, second lock nut arranges in adjusting nut one side and contradicts with the second mount pad.

The invention is further configured to: the rodless cylinder comprises a cylinder barrel, end covers arranged at two ends of the cylinder barrel, a magnetic coupling piston arranged on the inner wall of the cylinder barrel, and a magnetic coupling slide block arranged on the outer wall of the cylinder barrel and corresponding to the magnetic coupling piston, the magnetic coupling slide block is fixedly connected with a third mounting seat, the rodless cylinder is connected with a three-position five-way valve through a hose, and the three-position five-way valve is connected with a controller.

The invention is further configured to: the end cover is equipped with the dashpot, installs buffer in the dashpot, buffer includes the buffering push pedal, with the buffer tube that the buffering push pedal linked firmly, with the buffer pole, buffer piston, the buffer spring that the buffering push pedal linked firmly, buffer piston contradicts with the internal face of dashpot, the dashpot intussuseption is filled with buffer solution, buffer piston is contradicted to buffer spring's one end, and the other end contradicts the buffering push pedal, buffer piston is equipped with the direction projection of pegging graft in buffer spring.

The invention is further configured to: the buffer piston is provided with a buffer hole which is the same as the axis of the buffer rod, the buffer rod penetrates through the buffer hole, a sealing ring is embedded in the inner wall surface of the buffer hole, one end of the buffer rod is fixedly connected with the buffer push plate, the other end of the buffer rod is provided with a first magnet, the buffer groove is provided with a second magnet corresponding to the first magnet, and the magnetic pole of the first magnet is the same as that of the adjacent side of the second magnet.

The invention is further configured to: the bottom of dashpot is equipped with circulation mouth, connects through the pipe fitting between the circulation mouth, circulation mouth is equipped with first baffle and second baffle, circulation mouth is equipped with the installation department, and first baffle, second baffle pass through hinged joint with the installation department, first baffle is equipped with first splenium, the second baffle is equipped with the second splenium, and first splenium all corresponds with the buffer beam with the second splenium.

The invention is further configured to: the buffer cylinder is provided with a limiting part, the end cover is provided with a limiting plate arranged at the opening end of the buffer groove, one side of the limiting plate is abutted against and fixedly connected with the end cover, the other side of the limiting plate is provided with a damping pad which is elastic, and the surface of the damping pad is provided with a plurality of protrusions which are arc-shaped and are uniformly arranged.

The invention also provides a control method of the demoulding mechanism, which comprises the following steps: s1: the height of the demoulding mechanism is adjusted according to the size of the mould, and the threaded rod is moved along the axis direction by rotating the adjusting nut and is adjusted to a proper position;

s2; the pressure at two sides of the magnetic coupling piston in the cylinder barrel is respectively P1 and P2, the side P1 close to the die is P2;

s3; after the trimming process of the semi-finished product of the suction pipe is finished, the controller is used for controlling the three-position five-way valve to increase the pressure of P2, so that the magnetic coupling piston moves towards the direction of the die, the clamping mechanism is arranged above the die, and the clamping jaws of the air cylinder are controlled to clamp the waste material;

s4: the controller is used again to control the three-position five-way valve to increase the pressure of P1, so that the magnetic coupling piston moves towards the direction away from the die, after the magnetic coupling slide block stops moving, the cylinder clamping jaw is controlled to be opened, and the waste material falls into the waste material frame freely;

s5; and (5) continuously taking the waste material off the die by circulating the steps to complete the demoulding of the waste material.

The invention has the beneficial effects that:

1. through the threaded rod, adjusting nut adjusts the height that moving mechanism and clamp got the mechanism, through the uide bushing, the guide bar improves the threaded rod, stability when adjusting nut adjusts, through first lock nut, second lock nut makes the threaded rod, it is difficult not hard up to lock behind adjusting nut adjusting, improve adjustment mechanism's structure steadiness, get mechanism reciprocating motion through rodless cylinder drive clamp, through the slide rail, first slider improves the stability when getting the mechanism removal of clamp, improve the precision that the mechanism clamp got the waste material of clamp, get the piece through cylinder clamping jaw and clamp and once press from both sides the waste material and get, improve the efficiency of waste material drawing of patterns, and the machining efficiency is improved.

2. Through the dashpot, buffer device improves the buffering damping performance when magnetism coupling piston removes the cylinder tip, conflict magnetism coupling piston through the buffering push pedal, buffer spring, buffer piston, buffer solution carries out the damping buffering to the buffering push pedal respectively, through direction projection, the buffer beam, buffer cylinder improves buffer device's structure steadiness, improve the leakproofness between direction projection and the buffer beam through the sealing washer, prevent that buffer solution from revealing, through first magnet, second magnet further improves buffer device's shock-absorbing capacity.

3. Buffering push pedal is buffering through buffer spring damping earlier when receiving the impact, buffer solution in the dashpot is at buffer piston, first baffle, absorb kinetic energy and pressure rising under the effect of second baffle, further realize the buffering, the tip of buffer beam is contradicted to first splenium and second splenium when the buffering push pedal reachs the biggest stroke, open first baffle and second baffle, make the buffer solution release kinetic energy in the dashpot, make during the buffer solution flows into the dashpot in rodless cylinder other end cover, make the buffer in this dashpot reset simultaneously, improve the performance that buffer device made an uproar and fallen the damping through the damping pad, the life of rodless cylinder is improved.

Drawings

FIG. 1 is a schematic structural view of an embodiment of a blow molding machine body according to the present invention;

FIG. 2 is a schematic structural diagram of an embodiment of the moving mechanism and the adjusting mechanism of the present invention;

FIG. 3 is a schematic structural view of an embodiment of the clamping mechanism of the present invention;

FIG. 4 is a schematic structural view of an embodiment of the rodless cylinder of the present invention;

FIG. 5 is a schematic structural diagram of the embodiment of FIG. 4 at A;

reference number in the figure, 1, blow moulding machine body; 2. a gripping mechanism; 21. a third mounting seat; 22. a connecting seat; 23. a cylinder clamping jaw; 24. clamping and taking the workpiece; 3. a moving mechanism; 31. a second mounting seat; 32. a rodless cylinder; 321. a cylinder barrel; 322. an end cap; 3221. a buffer tank; 3222. a flow port; 3223. an installation part; 323. a magnetically coupled piston; 324. a magnetically coupled slider; 33. a slide rail; 34. a first slider; 35. a three-position five-way valve; 36. a controller; 4. an adjustment mechanism; 41. a guide sleeve; 42. a guide bar; 43. a threaded rod; 44. adjusting the nut; 45. a first lock nut; 46. a second lock nut; 5. a first mounting seat; 51. an adjustment hole; 6. a buffer device; 61. buffering the push plate; 62. a buffer cylinder; 621. a limiting part; 63. a buffer rod; 631. a first magnet; 64. a cushion piston; 641. a guide convex column; 642. a buffer hole; 643. a seal ring; 65. a buffer spring; 66. a second magnet; 67. a first baffle plate; 671. a first pressing portion; 68. a second baffle; 681. a second pressing section; 69. a limiting plate; 7. a vibration damping pad; 71. and (4) protruding.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following description clearly and completely describes the technical solution in the embodiment of the present invention with reference to fig. 1 to 5:

the utility model provides a straw blowing mould convenient to drawing of patterns, includes blowing machine body 1 and demoulding mechanism, installs the mould of production straw on the blowing machine body 1, and the mould has two stations, is the blowing extrusion and cuts edge respectively, and the straw automatically drops from the mould after cutting edge, and the overlap takes off the blanking department that moves to the overlap from the mould through demoulding mechanism, realizes the blanking respectively of straw and overlap, subtracts follow-up manual separation process, improves machining efficiency.

The waste material after punching is clamped and taken down from a mould to be demoulded through the clamping mechanism 2, the clamping mechanism 2 is made to reciprocate through the moving mechanism 3, the waste material is separated from the blanking position of a suction pipe, the moving mechanism 3 and the clamping mechanism 2 are installed on the blow molding machine body 1 through the first installation seat 5, the height of the moving mechanism 3 is adjusted through the adjusting mechanism 4, the clamping mechanism 2 is made to have proper height, the stable clamping of the waste material is ensured, the moving mechanism 3 comprises a second installation seat 31, a rodless cylinder 32 arranged on the second installation seat 31, a sliding rail 33 arranged on the second installation seat 31 and parallel to the axis of the rodless cylinder 32, and a first sliding block 34 matched with the sliding rail 33, the rodless cylinder 32 and the sliding rail 33 are both connected on the second installation seat 31 through screws, the first sliding block 34 is matched with the sliding rail 33 to ensure that the clamping mechanism 2 reciprocates, and the bearing capacity of the moving mechanism 3 is increased, the moving stability of the clamping mechanism 2 is ensured, the rodless cylinder 32 drives the clamping mechanism 2 to reciprocate, the moving stroke is further improved, and the space occupied by the demolding mechanism is reduced.

The clamping mechanism 2 comprises a third mounting seat 21, a connecting seat 22, a cylinder clamping jaw 23 and a clamping piece 24 fixedly connected with two sides of the cylinder clamping jaw 23, the cylinder clamping jaw 23 adopts a wide cylinder clamping jaw 23, the clamping piece 24 is connected with the cylinder clamping jaw 23 through a screw, the waste material is clamped by the clamping piece 24, the position of the clamping piece 24 when in clamping is controlled to be arranged at the position of the mold when the mold is closed during installation, the waste material is clamped before the die is opened, the waste material is directly demoulded after the die is opened, the clamping piece 24 is in a cuboid shape, the clamping piece 24 is guaranteed to be clamped once, all the waste material on the die is clamped, one end of the connecting seat 22 is fixedly connected to the third mounting seat 21, the other end of the connecting seat is fixedly connected with the air cylinder clamping jaw 23, the air cylinder clamping jaw 23 is mounted on the upper side of the die, the waste material is convenient to clamp, the third mounting seat 21 is connected with the first sliding block 34 through screws, and the stability of the third mounting seat 21 during moving is improved.

The adjusting mechanism 4 comprises a guide sleeve 41 fixedly connected to the first mounting seat 5, a guide rod 42 fixedly connected to the second mounting seat 31, a threaded rod 43 fixedly connected to the second mounting seat 31, an adjusting nut 44 arranged on the threaded rod 43, the guide sleeve 41 is matched with the guide rod 42, the second mounting seat 31 is limited to move only along the axial direction of the guide rod 42 by two pairs of guide sleeves 41 and the guide rod 42, the adjusting nut 44 is screwed to change the position of the adjusting nut 44 arranged on the threaded rod 43 so as to adjust the height of the moving mechanism 3, the height of the cylinder clamping jaw 23 is further adjusted, an adjusting hole 51 is arranged on the first mounting seat 5, the threaded rod 43 is ensured to pass through the adjusting hole 51, so that the adjusting nut 44 is abutted against the first mounting seat 5, the threaded rod 43 is provided with a first locking nut 45 and a second locking nut 46, the adjusting nut 44 is arranged on one side of the adjusting hole 51, the first locking nut 45 is arranged on the other side of the adjusting hole 51, the second locking nut 46 is arranged on one side of the adjusting nut 44 and is abutted against the second mounting seat 31, the threaded rod 43 is prevented from moving along the axis of the threaded rod by screwing the first locking nut 45 and the adjusting nut 44, the stability of the adjusting mechanism 4 after adjustment is improved, the connecting stability of the threaded rod 43 and the second mounting seat 31 is improved through the second locking nut 46, and the structural stability of the demoulding mechanism is further improved.

The rodless cylinder 32 comprises a cylinder 321, end covers 322 arranged at two ends of the cylinder 321, a magnetic coupling piston 323 arranged on the inner wall of the cylinder 321, a magnetic coupling slider 324 arranged on the outer wall of the cylinder 321 and corresponding to the magnetic coupling piston 323, wherein the magnetic coupling piston 323 corresponds to the magnetic coupling slider 324 to ensure that the magnetic coupling slider 324 moves along with the magnetic coupling piston 323, the magnetic coupling piston 323 is arranged in the cylinder 321 to move, the magnetic coupling piston 323 is tightly abutted against the inner wall of the cylinder 321 to isolate air at two sides of the magnetic coupling piston 323, the cylinder 321 is tightly connected with the end covers 322 to ensure the sealing performance of the cylinder 321 and ensure the stable use of the rodless cylinder 32, the magnetic coupling slider 324 is connected with the third mounting seat 21 through screws, the third mounting seat 21 is driven to move through the movement of the magnetic coupling slider 324 to realize the reciprocating movement of the clamping mechanism 2, the rodless cylinder 32 is connected with a three-position five-way valve 35 through a hose, the controller 36 is provided with time parameters to control the three-position five-way valve 35, so that the action of the rodless cylinder 32 is controlled, and the end cover 322 is connected with the second mounting seat 31 through screws, so that the structure is stable, and the use is stable.

The end cover 322 is provided with a buffer groove 3221, a buffer device 6 is installed in the buffer groove 3221, the buffer device 6 is movably connected in the buffer groove 3221, the buffer device 6 increases the damping and buffering performance of the magnetic coupling piston 323 moving to the end cover 322, reduces the vibration of the rodless cylinder 32, and improves the stability of the moving mechanism 3, the buffer device 6 comprises a buffer push plate 61, a buffer cylinder 62 fixedly connected with the buffer push plate 61, a buffer rod 63 fixedly connected with the buffer push plate 61, a buffer piston 64 and a buffer spring 65, when the magnetic coupling piston 323 moves to the end part, the magnetic coupling piston 323 firstly abuts against the buffer push plate 61, the buffer push plate 61 and the buffer cylinder 62 are integrally connected, the structural stability is ensured, the buffer piston 64 abuts against the inner wall surface of the buffer groove 3221, the kinetic energy is absorbed through the buffer spring 65, the vibration is reduced, one end of the buffer spring 65 abuts against the buffer piston 64, the other end of the buffer, make buffer piston 64 compression buffer slot 3221 further realize shock-absorbing capacity, the intussuseption of buffer slot 3221 is filled with buffer solution, buffer solution further improves buffer piston 64's shock-absorbing capacity, buffer piston 64 is provided with the direction projection 641 of pegging graft in buffer spring 65, improve the stability of buffer rod 63 through direction projection 641, and increase and use the steadiness to buffer spring 65, buffer slot 3221's degree of depth is greater than the length of buffer cylinder 62, guarantee buffer slot 3221's shock-absorbing capacity, reduce buffer piston 64 striking buffer slot 3221 bottom.

Buffer piston 64 is provided with the buffer hole 642 the same with buffer rod 63 axis, guarantee through buffer hole 642 that buffer rod 63 runs through, sealing washer 643 has been inlayed to the internal wall face of buffer hole 642, increase the leakproofness of buffer block through sealing washer 643, prevent that buffer solution from leaking, buffer rod 63's one end passes through threaded connection with buffering push pedal 61, buffer rod 63's the other end is provided with first magnet 631, buffer slot 3221 is provided with the second magnet 66 that corresponds with first magnet 631, the first magnet 631 is the same with the close side magnetic pole of second magnet 66, produce the repulsion through second magnet 66 to the first magnetic pole that comes that removes, further reduce buffer rod 63's kinetic energy, improve shock-absorbing capacity.

The bottom of the buffer groove 3221 is provided with a flow port 3222, the flow ports 3222 are connected through a pipe, so that a buffer solution in the buffer groove 3221 on one side of the rodless cylinder 32 flows into the buffer groove 3221 on the other side, the kinetic energy of the buffer piston 64 is slowly consumed through the flow of the buffer solution, the buffer performance is further improved, the buffer device 6 on the side receiving the buffer solution returns through the flow of the buffer solution, the buffer performance of the buffer device 6 is further improved, the flow port 3222 is provided with a first baffle 67 and a second baffle 68, the flow port 3222 is provided with a mounting portion 3223, the first baffle 67 and the second baffle 68 are connected with the mounting portion 3223 through a hinge, the buffer solution is prevented from flowing out of the buffer groove 3221 through the first baffle 67 and the second baffle 68, the first baffle 67 is provided with a first pressing portion 671, the second baffle 68 is provided with a second pressing portion 681, and the first pressing portion 671 and the second pressing portion 681 both correspond to the buffer rod 63, the buffer rod 63 is continuously pushed into and abutted against the first pressing part 671 and the second pressing part 681, the buffer rod 63 moves to the maximum stroke, the first baffle 67 and the second baffle 68 are opened by pressing the first pressing part 671 and the second pressing part 681, the high-pressure buffer solution in the buffer groove 3221 flows into the buffer groove 3221 at the other end, and therefore energy is slowly released, and further buffer performance of the buffer device 6 is achieved.

Buffer cylinder 62 is provided with spacing portion 621, end cover 322 is provided with the limiting plate 69 of arranging the buffer slot 3221 open end in, buffer cylinder 62 is further restricted through spacing portion 621 and the adaptation of limiting plate 69, prevent buffer cylinder 62 from popping out the separation in buffer slot 3221, further improve buffer 6's structural stability, one side and end cover 322 of limiting plate 69 are contradicted and are passed through the screw connection, the opposite side of limiting plate 69 is provided with damping pad 7 that is elastic form, damping pad 7 reduces the noise that produces when buffering push pedal 61 is to the striking of end cover 322, damping pad 7's surface is provided with a plurality of archs and arranges even arch 71 that are, buffering push pedal 61 supports the back with damping pad 7, warp the kinetic energy that absorbs buffering push pedal 61 through arch 71, further improve buffer 6's buffering, the damping, the performance of making an uproar falls.

A control method of a demoulding mechanism comprises the following steps: s1: the height of the demoulding mechanism is adjusted according to the size of the mould, and the threaded rod 43 is moved along the axial direction by rotating the adjusting nut 44 and is adjusted to a proper position;

s2; the pressures of the two sides of the magnetic coupling piston 323 in the cylinder 321 are respectively P1 and P2, the side P1 close to the die is P2;

s3; after the trimming process of the semi-finished product of the straw is finished, the controller 36 is used for controlling the three-position five-way valve 35 to increase the pressure of P2, so that the magnetic coupling piston 323 moves towards the direction of the mould, the clamping mechanism 2 is arranged above the mould, and the cylinder clamping jaw 23 is controlled to clamp the waste;

s4: the controller 36 is used again to control the three-position five-way valve 35 to increase the pressure of P1, so that the magnetic coupling piston 323 moves away from the die, the cylinder clamping jaw 23 is controlled to be opened after the magnetic coupling slide block 324 stops moving, and the waste material falls into the waste material frame freely;

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and those skilled in the art should be able to make general changes and substitutions within the technical scope of the present invention.

Claims

1. A straw blow molding mold convenient for demolding comprises a blow molding machine body (1) and a demolding mechanism, and is characterized in that the demolding mechanism further comprises a clamping mechanism (2) for clamping the punched waste material from the mold and demolding; a moving mechanism (3) which enables the clamping mechanism (2) to move in a reciprocating manner to separate the waste from the blanking position of the suction pipe; the first mounting seat (5) is used for mounting the moving mechanism (3) and the clamping mechanism (2) on the blow molding machine body (1) through the first mounting seat (5); the adjusting mechanism (4) is arranged between the first mounting seat (5) and the moving mechanism (3) and used for adjusting the height of the moving mechanism (3), and the moving mechanism (3) comprises a second mounting seat (31), a rodless cylinder (32) arranged on the second mounting seat (31), a sliding rail (33) arranged on the second mounting seat (31) and parallel to the axis of the rodless cylinder (32), and a first sliding block (34) matched with the sliding rail (33).

2. The straw blow mold convenient for demolding as claimed in claim 1, wherein the clamping mechanism (2) comprises a third mounting seat (21), a connecting seat (22), a cylinder clamping jaw (23) and a clamping piece (24) fixedly arranged on two sides of the cylinder clamping jaw (23), the clamping piece (24) is in a rectangular shape, one end of the connecting seat (22) is fixedly connected to the third mounting seat (21), the other end of the connecting seat is fixedly connected to the cylinder clamping jaw (23), and the third mounting seat (21) is fixedly connected to the first sliding block (34).

3. The straw blow mold facilitating demolding according to claim 2, wherein the adjusting mechanism (4) comprises a guide sleeve (41) fixedly connected to the first mounting seat (5), a guide rod (42) fixedly connected to the second mounting seat (31), a threaded rod (43) fixedly connected to the second mounting seat (31), and an adjusting nut (44) disposed on the threaded rod (43), the first mounting seat (5) is provided with an adjusting hole (51), the threaded rod (43) penetrates through the adjusting hole (51), the threaded rod (43) is provided with a first lock nut (45) and a second lock nut (46), the adjusting nut (44) is arranged on one side of the adjusting hole (51), the first locking nut (45) is arranged on the other side of the adjusting hole (51), the second locking nut (46) is arranged on one side of the adjusting nut (44) and is abutted against the second mounting seat (31).

4. The straw blow molding die convenient for demolding as claimed in claim 3, wherein the rodless cylinder (32) comprises a cylinder barrel (321), end covers (322) arranged at two ends of the cylinder barrel (321), a magnetic coupling piston (323) arranged on the inner wall of the cylinder barrel (321), and a magnetic coupling slider (324) arranged on the outer wall of the cylinder barrel (321) and corresponding to the magnetic coupling piston (323), the magnetic coupling slider (324) is fixedly connected with the third mounting seat (21), the rodless cylinder (32) is connected with a three-position five-way valve (35) through a hose, and the three-position five-way valve (35) is connected with a controller (36).

5. The straw blow mold convenient for demolding as claimed in claim 4, wherein the end cap (322) is provided with a buffer groove (3221), a buffer device (6) is installed in the buffer groove (3221), the buffer device (6) comprises a buffer push plate (61), a buffer cylinder (62) fixedly connected with the buffer push plate (61), a buffer rod (63) fixedly connected with the buffer push plate (61), a buffer piston (64) and a buffer spring (65), the buffer piston (64) abuts against the inner wall surface of the buffer groove (3221), the buffer groove (3221) is filled with a buffer solution, one end of the buffer spring (65) abuts against the buffer piston (64), the other end of the buffer piston abuts against the buffer push plate (61), and the buffer piston (64) is provided with a guide convex column (641) inserted into the buffer spring (65).

6. The straw blow mold convenient for demolding as claimed in claim 5, wherein the buffering piston (64) is provided with a buffering hole (642) having the same axis as the buffering rod (63), the buffering rod (63) penetrates through the buffering hole (642), a sealing ring (643) is embedded in the inner wall surface of the buffering hole (642), one end of the buffering rod (63) is fixedly connected with the buffering push plate (61), the other end of the buffering rod (63) is provided with a first magnet (631), the buffering groove (3221) is provided with a second magnet (66) corresponding to the first magnet (631), and the magnetic poles of the first magnet (631) and the second magnet (66) on the side close to each other are the same.

7. The straw blow mold convenient for demolding according to claim 6, wherein a circulation port (3222) is formed in the bottom of the buffer groove (3221), the circulation ports (3222) are connected through a pipe, the circulation port (3222) is provided with a first baffle (67) and a second baffle (68), the circulation port (3222) is provided with a mounting portion (3223), the first baffle (67), the second baffle (68) and the mounting portion (3223) are connected through a hinge, the first baffle (67) is provided with a first pressing portion (671), the second baffle (68) is provided with a second pressing portion (681), and the first pressing portion (671) and the second pressing portion (681) both correspond to the buffer rod (63).

8. The straw blow mold convenient to demold of claim 7, wherein the buffer cylinder (62) is provided with a limiting portion (621), the end cap (322) is provided with a limiting plate (69) arranged at the open end of the buffer groove (3221), one side of the limiting plate (69) is abutted against the end cap (322) and is fixedly connected with the end cap, the other side of the limiting plate (69) is provided with a damping pad (7) in an elastic shape, and the surface of the damping pad (7) is provided with a plurality of protrusions (71) which are arc-shaped and are uniformly arranged.

9. A control method applied to the mold-releasing mechanism according to claim 8, characterized by comprising the steps of: s1: the height of the demoulding mechanism is adjusted according to the size of the mould, and a threaded rod (43) is moved along the axial direction by rotating an adjusting nut (44) and is adjusted to a proper position;

s2; the pressure on two sides of a magnetic coupling piston (323) in a cylinder barrel (321) is respectively P1 and P2, the side P1 close to the die is P2;

s3; after the trimming process of the semi-finished product of the straw is finished, a controller (36) is used for controlling a three-position five-way valve (35) to increase the pressure of P2, so that a magnetic coupling piston (323) moves towards the direction of a mould, a clamping mechanism (2) is arranged above the mould, and a cylinder clamping jaw (23) is controlled to clamp the waste;

s4: the controller (36) is used again to control the three-position five-way valve (35) to increase the pressure of P1, so that the magnetic coupling piston (323) moves away from the die, after the magnetic coupling slide block (324) stops moving, the cylinder clamping jaw (23) is controlled to be opened, and the waste falls into the waste frame freely;