WO2021219081A1

WO2021219081A1 - Stretching and sealing linkage device of bottle blowing machine

Info

Publication number: WO2021219081A1
Application number: PCT/CN2021/090990
Authority: WO
Inventors: 叶鹏; 高伟强
Original assignee: 江苏新美星包装机械股份有限公司
Priority date: 2020-04-30
Filing date: 2021-04-29
Publication date: 2021-11-04
Also published as: CN111531851A

Abstract

Disclosed is a stretch and sealing linkage device of a bottle blowing machine, comprising an installation support, a stretching support arranged on the installation support, a linear guide rail arranged on the stretching support, a stretching mechanism, and a sealing mechanism. The stretching mechanism comprises a first installation seat movably arranged on the linear guide rail, a stretching rod arranged on the first installation seat, and a driving assembly arranged on the stretching support and used to drive the first installation seat. The sealing mechanism comprises a sealing cylinder arranged on the installation support, a vertical movement rod arranged in the sealing cylinder and capable of vertical movement, a sealing member arranged at a bottom end of the vertical movement rod, a first connecting rod having a lower end hinged to a top end of the vertical movement rod via a first shaft, and a second connecting rod having one end hinged to the stretching support via a second shaft, the other end of the second connecting rod and an upper end of the first connecting rod being hinged to each other via a third shaft. A roller is provided on the third shaft, and a cam surface is provided on the first installation seat and used to abut and drive the roller to synchronously rise therewith. The device of the present invention has high movement accuracy and good movement stability.

Description

Stretching and sealing linkage device of bottle blowing machine

Technical field

The invention relates to the technical field of bottle blowing, in particular to a stretch sealing linkage device of a bottle blowing machine.

Background technique

With the development of the bottle blowing machine in the direction of high speed and low noise, the requirements for the movement accuracy of the various mechanisms of the bottle blowing machine are getting higher and higher. During the execution of a bottle blowing action, it is necessary to continuously complete the lifting action of the sealing cylinder and the stretching rod. In the existing equipment, the lifting action of the sealing cylinder is powered by a cylinder or cam, and the lifting action of the stretching rod is provided by a cylinder or a servo motor. Power, the two lifting actions are driven by two different power mechanisms, the mechanical structure is more complex, the installation accuracy is poor, and there is a certain impact on the high-speed and stable operation of the equipment.

At present, there are devices that can realize the linkage between the sealing and stretching of the preform. In this device, the linkage is realized by the mutual collision of the sliders in the sliding direction. In this structure, the instantaneous impact force of the slider is relatively large, resulting in relatively low motion accuracy, poor motion stability, and shorter equipment service life.

Summary of the invention

The purpose of the present invention is to provide a stretch-sealing linkage device for a bottle blowing machine, which has high movement precision and good stability.

In order to achieve the above objective, the technical solution adopted by the present invention is:

A stretch-sealing linkage device for a bottle blowing machine, comprising a mounting bracket, a stretching bracket arranged on the mounting bracket, a linear guide rail arranged on the stretching bracket, a stretching mechanism, and a sealing mechanism;

The stretching mechanism includes a first mounting seat movably arranged on the linear guide, a stretching rod fixed on the first mounting seat, and a driving rod arranged on the stretching bracket. The driving assembly for the movement of the first mounting seat;

The sealing mechanism includes a sealing cylinder connected to the mounting bracket, a lifting rod penetrating the sealing cylinder that can be raised and lowered along its length extension direction, a sealing member provided at the bottom end of the lifting rod, and a lower end passing through the first A first connecting rod hinged on the top of the lifting rod with one axis, a second connecting rod hinged on the stretching bracket at one end through a second shaft, and the other end of the second connecting rod is connected to the first connecting rod The upper ends are hinged to each other through a third shaft; the stretching rod is inserted through the sealing member;

The third shaft is provided with a roller, and the first mounting seat is provided with a cam surface for resisting and driving the roller to rise synchronously when ascending.

Preferably, the cam surface is gradually inclined to approach the roller from top to bottom.

More preferably, when the first mounting seat rises, the cam surface gradually approaches and carries the rollers and rises synchronously; when the first mounting seat falls, the rollers fall synchronously until they are separated from the Cam surface.

More preferably, the cam surface includes a cam side surface that is gradually inclined from top to bottom and is close to the side of the roller, and a cam bottom surface for supporting the bottom of the roller;

When the first mounting seat rises, the roller rolls along the side of the cam until it hits the bottom surface of the cam, and then rises together;

When the first mounting seat is lowered, the roller rolls from the bottom surface of the cam along the side surface of the cam until it separates from the side surface of the cam.

Preferably, the first axis, the second axis and the third axis are parallel to each other and perpendicular to the linear guide rail.

Preferably, the first mounting seat is located below the second shaft and between the linear guide rail and the first connecting rod.

Preferably, the sealing mechanism further includes a second mounting seat movably provided on the linear guide rail, the lifting rod is fixedly connected to the second mounting seat through the first shaft, and the second mounting seat The mounting seat is arranged below the first mounting seat.

More preferably, the stretching rod passes downwardly through the second mounting seat, the lifting rod and the sealing member in sequence.

More preferably, both ends of the first shaft respectively pass through the second mounting seat, and both ends of the first shaft are respectively connected with a symmetrically distributed link mechanism, and the link mechanism includes the first shaft connected in sequence. A connecting rod, the third shaft, the second connecting rod and the second shaft.

Preferably, the driving component is a servo motor.

Preferably, the mounting bracket is arranged on the frame of the bottle blowing machine so as to be rotatable in the circumferential direction.

More preferably, the drive assembly is a drive cylinder, the first mounting seat is provided with a rotor, and the bottle blowing machine frame is provided with a limit cam that abuts on the rotor.

Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art: a stretch-sealing linkage device of a bottle blowing machine of the present invention drives the first mounting seat to rise and fall through a drive assembly;

When the seal is lowered, the roller and the lifting rod are lowered synchronously with the first mounting seat until the sealing, and then the first mounting seat continues to descend and drives the stretching rod to continue to stretch the preform downwards. The first mounting seat lifts the lifting rod down To the buffering effect;

When the opening is raised, the cam surface on the first mounting seat abuts the roller on the third shaft to drive the lifting rod to rise synchronously;

The linkage device can realize the linkage between the sealing and stretching of the preform, the contact between the cam surface and the roller is soft and controllable, the impact force is small, the movement accuracy is high, and the movement stability is good.

Description of the drawings

Figure 1 is a schematic diagram of the first embodiment of the device of the present invention (sealing state);

Figure 2 is a schematic diagram of the second embodiment of the device of the present invention (unsealed state);

Figure 3 is the right side view of Figure 2;

Figure 4 is an enlarged schematic diagram of A in Figure 2;

Figure 5 is a schematic structural diagram of the second embodiment of the device of the present invention (unsealed state);

Fig. 6 is a right side view of Fig. 5.

Among them: 1. Mounting bracket; 2. Stretching bracket; 3. Linear guide; 4. First mounting seat; 5. Stretching rod; 6. Sealing cylinder; 7. Lifting rod; 8. Sealing parts; 9. First Shaft; 10, first connecting rod; 11, second shaft; 12, second connecting rod; 13, third shaft; 14, roller; 15, cam surface; 151, cam side surface; 152, cam bottom surface; 16, The second mounting seat; 17, the servo motor; 18, the drive cylinder; 19, the fourth shaft; 20, the rotor; 21, the limit cam; 22, the locking sleeve.

Detailed ways

The technical scheme of the present invention will be further explained below in conjunction with the accompanying drawings.

As shown in Figure 1-6, the above-mentioned stretch-sealing linkage device of the bottle blowing machine includes a mounting bracket 1 which is arranged on the frame (not shown in the figure) of the bottle blowing machine and can be rotated in the circumferential direction. The stretching bracket 2 on the bracket 1, the linear guide 3 arranged on the stretching bracket 2, the stretching mechanism, and the sealing mechanism. In this embodiment, both the stretching support 2 and the linear guide 3 extend in the vertical direction, and the linear guide 3 is located on the side of the stretching support 2 close to the sealing mechanism. The rotation center line of the mounting bracket 1 extends in the vertical direction.

The above-mentioned stretching mechanism is used to stretch the preform, and includes a first mounting seat 4 provided on the linear guide 3 that can move up and down along the length extension direction of the linear guide 3, and a stretcher fixed on the first mounting seat 4 The extension rod 5 is a driving assembly connected to the extension support 2 for driving the first mounting seat 4 to move up and down. In this embodiment, the stretching rod 5 extends in the vertical direction, and is used to penetrate downward into the preform and stretch the preform downward. As shown in FIG. 1, the first mounting base 4 includes a locking sleeve 22 on the right side, and the stretching rod 5 is fixedly inserted through the locking sleeve 22.

The above-mentioned sealing mechanism is used to seal the preform before the bottle is blown, and includes a sealing cylinder 6 connected to the mounting bracket 1, a lifting rod 7 inserted in the sealing cylinder 6 that can be raised and lowered along its length extension direction, and a lifting rod 7 arranged in the lifting The sealing member 8 at the bottom end of the rod 7 is used to seal the mouth of the preform. The sealing member 8 is located below the sealing cylinder 6. The sealing cylinder 6 guides the lifting rod 7 up and down. The sealing cylinder 6 is also provided with a driving rod for driving the lifting rod. 7 Descending gas spring. In this embodiment, the sealing cylinder 6, the lifting rod 7 and the sealing member 8 are arranged coaxially, and their axis lines all extend in the vertical direction. The sealing cylinder 6 is located above the mounting bracket 1, the sealing member 8 is located below the mounting bracket 1, and the upper and lower ends of the lifting rod 7 pass through the upper and lower ends of the sealing cylinder 6 respectively.

As shown in Fig. 1, the above-mentioned sealing mechanism further includes a first connecting rod 10 whose lower end is hinged to the top of the lifting rod 7 through a first shaft 9, and a second connecting rod 12 whose one end is hinged to the stretching support 2 through a second shaft 11. The other end of the second link 12 and the upper end of the first link 10 are hinged to each other via a third shaft 13. In this embodiment, the first shaft 9 is connected to the top end of the lifting rod 7, the second shaft 11 is connected to the stretching bracket 2, the left end of the second link 12 is hinged on the second shaft 11, and the right end is connected to the first link 10 The upper ends are hinged to each other through the third shaft 13, and the lower end of the first connecting rod 10 is hinged to the first shaft 9. The first shaft 9, the second shaft 11 and the third shaft 13 are parallel to each other, and their axis lines all extend in the horizontal direction (ie, the direction perpendicular to the paper surface in FIG. 1) and are perpendicular to the linear guide 3. The first mounting seat 4 is located below the second shaft 11 and between the linear guide 3 and the first connecting rod 10.

The above-mentioned sealing mechanism also includes a second mounting seat 16 arranged on the linear guide 3 which can move up and down along the length of the linear guide 3, the lifting rod 7 is fixedly connected to the second mounting seat 16 through the first shaft 9, and the second The mounting seat 16 is provided below the first mounting seat 4. Specifically, the upper end of the lifting rod 7 passes through the second mounting seat 16, and the first shaft 9 passes through the second mounting seat 16 and the lifting rod 7. By providing the second mounting seat 16, the lifting movement of the lifting rod 7 is stabilized and guided. In this embodiment, the above-mentioned stretching rod 5 passes through the second mounting seat 16, the lifting rod 7 and the sealing member 8 sequentially downwards to enter the preform. The lifting rod 7 is a tubular member, and its inner diameter is larger than the outer diameter of the stretching rod 5.

Referring to Figure 3, in this embodiment, the left and right ends of the first shaft 9 pass through the second mounting seat 16, the left and right ends of the first shaft 9 are respectively connected with symmetrically distributed link mechanisms, and the linear guide 3 is located at Between two sets of linkage mechanisms. Each link mechanism includes a first link 10, a third shaft 13, a second link 12, and a second shaft 11 connected in sequence. The two sets of linkage mechanisms are symmetrical and move synchronously. Through this setting, the stability of the linkage action is ensured.

The third shaft 13 is provided with a roller 14, and the first mounting seat 4 is provided with a cam surface 15 which is used to resist and drive the roller 14 to rise synchronously when it is raised. In this embodiment, the roller 14 is sleeved on the third shaft 13 to be coaxially rotatable, and the cam surface 15 is provided on the right side of the first mounting seat 4 (that is, the right side in FIG. 2 ). The cam surface 15 is a cam curved surface, and the cam curved surface includes a cam side surface 151 that is gradually inclined from top to bottom to be close to the side of the roller 14 and a cam bottom surface 152 for supporting the bottom of the roller 14. By setting the shape of the cam curved surface, when the first mounting seat 4 rises, the cam curved surface gradually approaches and bears the roller 14, and the roller 14 rolls along the cam side surface 151 until it touches the cam bottom surface 152. The contact between the two is soft and controllable, and the impact force is small, so that the precision of the linked motion is higher and the stability is better.

In this embodiment, two sets of linkage mechanisms are included. Correspondingly, there are two sets of third shafts 13 and rollers 14, and the two third shafts 13 are located on both sides of the locking sleeve 22, respectively.

When the first mounting seat 4 rises, it gradually approaches through the cam surface 15 and drives the roller 14 to rise synchronously; when the first mounting seat 4 descends, the roller 14 is under the action of gravity (roller 14, first connecting rod 10, The two connecting rods 12, the second mounting seat 16, the lifting rod 7, and the sealing member 8 can be regarded as a whole, under the effect of the overall gravity) and/or the action of the gas spring is lowered synchronously until it is separated from the cam surface 15 after sealing.

Specifically, when the first mounting seat 4 rises, the roller 14 rolls along the cam side surface 151 until it abuts the cam bottom surface 152, and then rises together; after the first mounting seat 4 is lowered to the seal, the roller 14 moves from the cam bottom surface 152 along the cam The side surface 151 rolls until it disengages from the side surface 151 of the cam.

Referring to FIGS. 1-4, in the first embodiment, the above-mentioned driving component is a servo motor 17.

Referring to Figs. 5-6, in the second embodiment, the above-mentioned driving component is a driving cylinder 18, and the driving cylinder 18 may be a pneumatic cylinder or a hydraulic cylinder. The first mounting seat 4 is provided with a fourth shaft 19, and the rotor 20 is sleeved on the fourth shaft 19 to rotate around the axis of the fourth shaft 19, and the bottle blowing machine frame is provided with the rotor 20. On the limit cam 21. In this embodiment, the fourth shaft 19 extends in the horizontal direction and is perpendicular to the third shaft 13, and the fourth shaft 19 is protrudingly arranged outside the locking sleeve 22 (see FIG. 5), and the limit cam 21 abuts Located below the rotor 20, the limiting cam 21 has an upper surface extending downwardly. Since the stroke of the driving cylinder 18 is uncontrollable, by setting the rotor 20 and the limit cam 21, the limit cam 21 is located on a cylindrical surface centered on the axis of rotation of the mounting bracket 1, and can control the downward movement of the first mounting seat 4 The itinerary. That is, during the descending process of the first mounting base 4, since the mounting bracket 1 keeps rotating, the rotor 20 always abuts on the limit cam 21. In order to avoid interference, the rolling path of the roller 14 on the cam surface 15 and the fourth shaft 19 are offset from each other.

The following specifically describes the working process of this embodiment:

When the preform needs to be sealed, the driving assembly drives the first mounting seat 4 to move downwards, and the entirety of the roller 14 and the lifting rod 7 is moved downwards synchronously under the action of gravity and/or the action of the gas spring, until the sealing piece 8 After the mouth is sealed against the preform, the first mounting seat 4 continues to move downward and disengages from the roller 14, until the stretching rod 5 drops to the set height, and the stretching action of the preform is completed;

Blow the preform with pressurized gas. When the blowing is completed, the driving assembly drives the first mounting seat 4 to move upwards. The cam surface 15 moves up to the collision roller 14 and then drives the roller 14 to move upwards synchronously to realize the sealing member 8 and When the mouth of the bottle body is disengaged, the driving assembly continues to drive the first mounting seat 4 to move upward until the stretching rod 5 is completely withdrawn from the bottle body.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement them, and they cannot limit the scope of protection of the present invention. All equivalent changes or modifications made by the essence should be covered by the protection scope of the present invention.

Claims

A stretch-sealing linkage device for a bottle blowing machine, comprising a mounting bracket, characterized in that: the device further includes a stretching bracket arranged on the mounting bracket, a linear guide rail arranged on the stretching bracket, and Institutions, sealing institutions;

The stretching mechanism includes a first mounting seat movably arranged on the linear guide, a stretching rod fixed on the first mounting seat, and a driving rod arranged on the stretching bracket. The driving assembly for the movement of the first mounting seat;

The sealing mechanism includes a sealing cylinder connected to the mounting bracket, a lifting rod penetrating the sealing cylinder that can be raised and lowered along its length extension direction, a sealing member provided at the bottom end of the lifting rod, and a lower end passing through the first A first connecting rod hinged on the top of the lifting rod with one axis, a second connecting rod hinged on the stretching bracket at one end through a second shaft, and the other end of the second connecting rod is connected to the first connecting rod The upper ends are hinged to each other through a third shaft; the stretching rod is inserted through the sealing member;

The third shaft is provided with a roller, and the first mounting seat is provided with a cam surface for colliding and driving the roller to rise synchronously when rising;

The cam surface is gradually inclined to approach the roller from top to bottom;

When the first mounting seat rises, the cam surface gradually approaches and carries the roller to rise synchronously; when the first mounting seat falls, the roller synchronously descends until it leaves the cam surface after sealing;

The cam surface includes a cam side surface that is gradually inclined from top to bottom and is close to the side of the roller, and a cam bottom surface for supporting the bottom of the roller;

When the first mounting seat rises, the roller rolls along the side of the cam until it hits the bottom surface of the cam, and then rises together;

When the first mounting seat is lowered, the roller rolls from the bottom surface of the cam along the side surface of the cam until it separates from the side surface of the cam;

The first axis, the second axis, and the third axis are parallel to each other and perpendicular to the linear guide rail;

The first mounting seat is located below the second shaft and between the linear guide rail and the first connecting rod;

The sealing mechanism further includes a second mounting seat movably arranged on the linear guide rail, the lifting rod is fixedly connected to the second mounting seat through the first shaft, and the second mounting seat is provided with Below the first mounting seat;

The stretching rod passes downwards through the second mounting seat, the lifting rod and the sealing member in sequence;

The two ends of the first shaft respectively pass through the second mounting seat, and the two ends of the first shaft are respectively connected with a symmetrically distributed link mechanism, and the link mechanism includes the first link, The third shaft, the second connecting rod and the second shaft;

The mounting bracket is rotatably arranged on the frame of the bottle blowing machine in the circumferential direction;

The driving component is a servo motor;

Or the drive assembly is a drive cylinder, the first mounting seat is provided with a rotor, and the bottle blowing machine frame is provided with a limit cam that abuts on the rotor.
A stretch-sealing linkage device for a bottle blowing machine, comprising a mounting bracket, characterized in that: the device further includes a stretching bracket arranged on the mounting bracket, a linear guide rail arranged on the stretching bracket, and Institutions, sealing institutions;

The stretching mechanism includes a first mounting seat movably arranged on the linear guide, a stretching rod fixed on the first mounting seat, and a driving rod arranged on the stretching bracket. The driving assembly for the movement of the first mounting seat;

The sealing mechanism includes a sealing cylinder connected to the mounting bracket, a lifting rod penetrating the sealing cylinder that can be raised and lowered along its length extension direction, a sealing member provided at the bottom end of the lifting rod, and a lower end passing through the first A first connecting rod hinged on the top of the lifting rod with one axis, a second connecting rod hinged on the stretching bracket at one end through a second shaft, and the other end of the second connecting rod is connected to the first connecting rod The upper ends are hinged to each other through a third shaft; the stretching rod is inserted through the sealing member;

The third shaft is provided with a roller, and the first mounting seat is provided with a cam surface for resisting and driving the roller to rise synchronously when ascending.
The stretch-sealing linkage device of a bottle blowing machine according to claim 2, characterized in that: the cam surface is gradually inclined to approach the roller from top to bottom.
The stretch-sealing linkage device of a bottle blowing machine according to claim 3, characterized in that: when the first mounting seat rises, the cam surface gradually approaches and carries the rollers to rise synchronously; When a mounting seat is lowered, the rollers are lowered synchronously until they are separated from the cam surface after sealing.
The stretch-sealing linkage device of a bottle blowing machine according to claim 4, characterized in that: the cam surface includes a cam side surface that is gradually inclined from top to bottom and is close to the side of the roller, and is used to carry the The bottom surface of the cam at the bottom of the roller;

When the first mounting seat rises, the roller rolls along the side of the cam until it hits the bottom surface of the cam, and then rises together;

When the first mounting seat is lowered, the roller rolls from the bottom surface of the cam along the side surface of the cam until it separates from the side surface of the cam.
The stretch-sealing linkage device of a bottle blowing machine according to claim 2, wherein the first shaft, the second shaft and the third shaft are parallel to each other and perpendicular to the linear guide rail.
The stretch-sealing linkage device of a bottle blowing machine according to claim 2, wherein the first mounting seat is located below the second shaft, and is located between the linear guide rail and the first connecting rod between.
The stretch-sealing linkage device of a bottle blowing machine according to claim 2, characterized in that: the sealing mechanism further comprises a second mounting seat movably arranged on the linear guide rail, and the lifting rod passes through the The first shaft is fixedly connected to the second mounting seat, and the second mounting seat is arranged below the first mounting seat.
The stretch-sealing linkage device of a bottle blowing machine according to claim 8, wherein the stretch rod passes downward through the second mounting seat, the lifting rod and the sealing member in sequence.
The stretch-sealing linkage device of a bottle blowing machine according to claim 8, wherein the two ends of the first shaft respectively pass through the second mounting seat, and the two ends of the first shaft are respectively connected with symmetrical A distributed link mechanism, the link mechanism includes the first link, the third shaft, the second link, and the second shaft that are connected in sequence.
The stretch-sealing linkage device of a bottle blowing machine according to claim 2, wherein the driving component is a servo motor.
The stretch-sealing linkage device of a bottle blowing machine according to claim 2, wherein the mounting bracket is arranged on the frame of the bottle blowing machine so as to be rotatable along the circumferential direction.
The stretch-sealing linkage device of a bottle blowing machine according to claim 12, wherein the driving assembly is a driving cylinder, the first mounting seat is provided with a rotor, and the bottle blowing machine frame is provided with a rotor. There is a limit cam set against the rotor.