A stretch sealing linkage device for bottle blowing machine

Abstract

The present invention discloses a stretching and sealing linkage device for a bottle blowing machine, comprising a bracket, a first guide rail arranged on the bracket and extending in a first direction, a stretching mechanism and a sealing mechanism, wherein the stretching mechanism comprises a first slider arranged on the first guide rail and a first rotor arranged on the first slider; the sealing mechanism comprises a sealing cylinder arranged on the bracket, a sealing shaft inserted in the sealing cylinder, a second slider arranged on the first guide rail and used to connect the sealing shaft, a second rotor arranged on the second slider, a second guide rail arranged on the bracket and extending in a second direction, and a third slider arranged on the second guide rail; the third slider is provided with a first cam curve and a second cam curve respectively used to cooperate with the rotation of the first rotor and the second rotor; when the first slider slides relative to the third slider, the first rotor always abuts against the first cam curve. The present invention discloses a stretching and sealing linkage device for a bottle blowing machine, which has few moving components, low debugging difficulty, high movement accuracy and good movement stability.

Description

Technical Field

[0001] The invention relates to the technical field of bottle blowing, and in particular to a stretching and sealing linkage device for a bottle blowing machine. Background Art

[0002] As the bottle blowing machine develops towards high speed and low noise, the requirements for the motion accuracy of each mechanism of the bottle blowing machine are getting higher and higher. During the execution of a bottle blowing action, the lifting and lowering actions of the sealing cylinder and the stretching rod need to be completed continuously. The lifting and lowering action of the sealing cylinder of the existing equipment is powered by a cylinder or a cam, and the lifting and lowering action of the stretching rod is powered by a cylinder or a servo motor. The two actions have two different powers, the structure is complex, and the installation accuracy is poor, which has a certain impact on the high-speed and stable operation of the equipment.

[0003] Currently, there is a device that can realize the linkage between preform sealing and stretching. In this device, after sealing, the rotor and the slider will separate from each other, and the slider will continue to move downward to cooperate with the stretching. This will cause the slider to move upward and hit the rotor after the stretch blow molding is completed, resulting in low movement accuracy and poor movement stability; and the equipment has many parts and is difficult to debug. Summary of the invention

[0004] The object of the present invention is to provide a stretch sealing linkage device for a bottle blowing machine, which has fewer moving components, lower processing difficulty and cost, lower debugging difficulty, higher movement accuracy and better movement stability.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A stretching and sealing linkage device for a bottle blowing machine comprises a bracket, a first guide rail arranged on the bracket, a stretching mechanism and a sealing mechanism, wherein the first guide rail extends along a first direction.

[0007] The stretching mechanism comprises a first slider slidably disposed on the first guide rail, a first rotor rotatable around its own axis and disposed on the first slider, a stretching rod connected to the first slider, and a driving unit disposed on the bracket and used for driving the first slider to slide;

[0008] The sealing mechanism comprises a sealing cylinder arranged on the bracket, a sealing shaft movable along a first direction and passing through the sealing cylinder, a second slider slidably arranged on the first guide rail and used to connect the sealing shaft, a second rotor rotatable around its own axis and arranged on the second slider, a second guide rail arranged on the bracket and extending along a second direction, and a third slider slidably arranged on the second guide rail;

[0009] The third sliding block is provided with a first cam curve and a second cam curve for respectively cooperating with the first rotor and the second rotor to roll; the first cam curve comprises a first inclined segment and a straight segment sequentially connected along a first direction; the second cam curve comprises a second inclined segment; the straight segment is parallel to the first direction, the direction of the line between the two end points of the first inclined segment is at an angle to the first direction and the second direction respectively, and the inclination trend of the second inclined segment is the same as that of the first inclined segment;

[0010] When the first sliding block slides relative to the third sliding block, the first rotor is always disposed on the first cam curve.

[0011] Preferably, the linkage device has an initial position, a sealing position and a stretching position;

[0012] When the driving unit drives the first slider to slide in the first direction, the first rotor rolls on the first inclined section and drives the third slider to slide in the second direction. The third slider drives the second slider through the second rotor to drive the sealing shaft to move in the first direction, so that the linkage device switches from the initial position to the sealing position.

[0013] When the driving unit continues to drive the first slider to slide in the first direction, the first rotor disengages from the first inclined section and rolls in the straight section, the second slider and the third slider remain stationary, and the first slider drives the stretching rod to continue to move in the first direction, so that the linkage device switches from the sealing position to the stretching position.

[0014] Preferably, the first direction extends from top to bottom along the vertical direction, and the second direction extends along the horizontal direction; the rotation center lines of the first rotor and the second rotor are parallel to each other and extend along the horizontal direction and are perpendicular to the second direction.

[0015] Preferably, the first inclined section is a straight line or a planar curve.

[0016] Preferably, the second inclined section is a straight line or a planar curve.

[0017] Preferably, the angle of a line connecting two end points of the second inclined section is the same as or different from the angle of a line connecting two end points of the first inclined section.

[0018] Preferably, the first cam curve is a curved groove or a curved flange.

[0019] Preferably, the second cam curve is a curved groove or a curved flange.

[0020] Preferably, the driving unit, the first slider, the second slider, and the sealing cylinder are arranged in sequence along a first direction.

[0021] More preferably, the stretching rod passes through the second sliding block and the sealing shaft in sequence along the first direction.

[0022] Due to the application of the above technical scheme, the present invention has the following advantages compared with the prior art: the present invention provides a stretching and sealing linkage device for a bottle blowing machine, in which the sliding of the first slider links the sliding of the third slider and the second slider to achieve stretching and sealing, and the linkage action is respectively completed by two sets of rotors and cam curves, and both sets of cam curves are plane cams, with fewer moving components, lower processing difficulty and processing cost, and lower debugging difficulty; by setting the shape of the cam curve to realize whether the sliding of the first slider is linked to the sliding of the third slider, it is possible to avoid mutual interference between the stretching movement and the sealing movement; when the first slider slides relative to the third slider, no matter whether the third slider is in a moving state or a stationary state, the first rotor is always against the first cam curve, with higher movement accuracy and better movement stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Attached Figure 1 The structure of the linkage device according to a specific embodiment of the present invention is shown in FIG. Figure 1 (The linkage is in the initial position);

[0024] Attached Figure 2 The structure of the linkage device according to a specific embodiment of the present invention is shown in FIG. Figure 2 (The linkage device is in the sealing position);

[0025] Attached Figure 3 The structure of the linkage device according to a specific embodiment of the present invention is shown in FIG. Figure 3 (linkage in extended position);

[0026] Attached Figure 4 It is a schematic structural diagram of the third slider.

[0027] Wherein: 1. bracket; 2. first slider; 3. first rotor; 4. stretching rod; 5. driving unit; 6. sealing cylinder; 7. sealing shaft; 8. second slider; 9. second rotor; 10. second guide rail; 11. third slider; 111. first cam curve; 1111. first inclined section; 1112. straight section; 112. second cam curve; 12. first guide block; 13. second guide block; 14. screw rod; 15. first guide rail. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described below in conjunction with specific embodiments and drawings.

[0029] See also Figure 1-4As shown, this embodiment provides a stretching and sealing linkage device for a bottle blowing machine, comprising a bracket 1, a stretching mechanism and a sealing mechanism arranged on the bracket 1. The stretching mechanism is used to stretch the preform when blowing the bottle, and the sealing mechanism is used to seal the preform when blowing the bottle.

[0030] See also Figure 1 As shown, the bracket 1 is provided with a first guide block 12 and a second guide block 13 arranged at intervals along the first direction, and the sides of the first guide block 12 and the second guide block 13 are respectively provided with a second guide rail 10 extending along the second direction; the bracket 1 is also provided with a first guide rail 15 extending along the first direction.

[0031] In this embodiment, the first direction is Figure 1 The vertical direction from top to bottom in the second direction is Figure 1 The first guide rail 15 is a guide convex rail, and the two second guide rails 10 are guide grooves. The first guide block 12 is located above the second guide block 13.

[0032] The stretching mechanism includes a first slider 2 which is arranged on a first guide rail 15 and can slide along a first direction, a first rotor 3 which is arranged on the side of the first slider 2 and can rotate around its own axis, a stretching rod 4 connected to the first slider 2, and a driving unit 5 which is arranged on the bracket 1 and is used to drive the first slider 2 to slide.

[0033] See also Figure 1 As shown, the first slider 2 is located between the first guide block 12 and the second guide block 13, the rotation axis of the first rotor 3 extends in the horizontal direction and is perpendicular to the second guide rail 10; the upper end of the stretching rod 4 is connected to the first slider 2; the driving unit 5 is arranged on the top of the bracket 1 and is located above the first guide block 12, and the driving unit 5 is a servo motor or a driving cylinder. In this embodiment, the driving unit 5 is a servo motor, and the lead screw 14 coaxially connected to the output end thereof passes downward through the first guide block 12 and the first slider 2, and is threadedly connected to the nut connector (not shown in the figure) on the first slider 2, and the lead screw 14 extends in the first direction, and the first slider 2 is driven to move in the first direction through the rotation of the lead screw 14.

[0034] The above-mentioned sealing mechanism includes a sealing cylinder 6 arranged on the bracket 1, a sealing shaft 7 that can move along the first direction and pass through the sealing cylinder 6, a second slider 8 that can slide along the first direction and is arranged on the first guide rail 15 and is used to connect the sealing shaft 7, and a second rotor 9 that can rotate around its own axial centerline and is arranged on the side of the second slider 8.

[0035] See also Figure 1As shown, the driving unit 5, the first guide block 12, the first slider 2, the second slider 8, and the second guide block 13 are arranged in sequence along the first direction; the upper end of the sealing shaft 7 passes through the sealing cylinder 6 upward, the sealing shaft 7 is connected to the second slider 8 through its upper end, the lower end of the sealing shaft 7 passes through the sealing cylinder 6 downward, the sealing shaft 7 seals the preform through its lower end, and the second slider 8 slides up and down, driving the sealing shaft 7 to slide up and down synchronously; the rotation axis of the second rotor 9 is parallel to the rotation axis of the first rotor 3. The stretching rod 4 passes through the second slider 8 and the sealing shaft 7 in sequence along the first direction, and is used to stretch the preform.

[0036] The sealing mechanism further includes a third slider 11 slidable along the second direction and disposed on the second guide rail 10. The third slider 11 is provided with a first cam curve 111 for cooperating with the rolling of the first rotor 3, and a second cam curve 112 for cooperating with the rolling of the second rotor 9. In this embodiment, the third slider 11, the first rotor 3, and the second rotor 9 are all disposed on the same side of the bracket 1.

[0037] See also Figure 4 As shown, the first cam curve 111 includes a first inclined segment 1111 and a straight segment 1112 connected in sequence along the first direction; the second cam curve 112 includes a second inclined segment, the straight segment 1112 is parallel to the first direction, the direction of the line between the two end points of the first inclined segment 1111 is respectively at an angle to the first direction and the second direction, and the inclination trend of the second inclined segment is the same as that of the first inclined segment 1111. The same inclination trend here means that when the first inclined segment 1111 is inclined from the upper left to the lower right direction, the second inclined segment is also inclined from the upper left to the lower right direction.

[0038] The angle of the line between the two ends of the second inclined section is the same as or different from the angle of the line between the two ends of the first inclined section 1111. By setting the angles of the two lines respectively, the descending speed of the second slider 8 can be controlled by the descending speed of the first slider 2.

[0039] The first inclined section 1111 is a straight line or a plane curve, and the second inclined section is a straight line or a plane curve. That is, the first cam curve 111 combined with the third slider 11 is a plane cam, and the second cam curve 112 combined with the third slider 11 is also a plane cam. Through this setting, the processing difficulty, processing cost and debugging difficulty are further reduced.

[0040] The first cam curve 111 is a curved groove or a curved flange, and the second cam curve 112 is a curved groove or a curved flange. In this embodiment, the first cam curve 111 and the second cam curve 112 are both curved grooves, and the first rotor 3 and the second rotor 9 each have only one, which are arranged in the curved grooves one by one. In another embodiment, the first cam curve 111 and the second cam curve 112 are both curved flanges, and the first rotor 3 and the second rotor 9 each have two, which are respectively arranged on both sides of the corresponding curved flanges.

[0041] The sliding of the first slider 2 links the sliding of the third slider 11 and the second slider 8 to achieve stretching and sealing. The linkage action is completed by two sets of rotors and cam curves respectively. Both sets of cam curves are plane cams, with fewer moving components, lower processing difficulty and cost, and lower debugging difficulty. By setting the shape of the cam curve, it can be realized whether the sliding of the third slider 11 is linked when the first slider 2 slides, so as to avoid interference between the stretching movement and the sealing movement. When the first slider 2 slides relative to the third slider 11, no matter whether the third slider 11 is in a moving state or a stationary state, the first rotor 3 is always against the first cam curve 111, and the second rotor 9 is always against the second cam curve 112, so that the movement accuracy is high and the movement stability is good.

[0042] In this embodiment, the stretch sealing linkage device of the bottle blowing machine has an initial position ( Figure 1 )、Sealing position( Figure 2 ) and stretched position ( Figure 3 );

[0043] Figure 1 In the figure, the first slider 2 and the second slider 8 are located at their respective upper starting points;

[0044] Figure 2 In the embodiment, the second slider 8 is located at the lower end point;

[0045] Figure 3 In the figure, the first slider 2 and the second slider 8 are respectively located at their respective lower end points.

[0046] When blowing bottles, the driving unit 5 drives the first slider 2 to slide downward in the first direction, and the first rotor 3 rolls and moves downward in the first inclined section 1111 to drive the third slider 11 to move forward in the second direction (i.e. Figure 1 The third slider 11 drives the second slider 8 to slide downward through the second rotor 9, and the second slider 8 drives the sealing shaft 7 to move downward along the first direction to seal the preform. When the second slider 8 moves downward to the lower end (that is, when the first rotor 3 is about to move downward away from the first inclined section 1111), the linkage device switches from the initial position to the sealing position;

[0047] The driving unit 5 continues to drive the first slider 2 to slide downward along the first direction. At this time, the first rotor 3 breaks away from the first inclined section 1111, rolls in the straight section 1112 and slides downward. The third slider 11 remains stationary, and the second slider 8 also remains stationary. The first slider 2 drives the stretching rod 4 to continue to move downward along the first direction, and the bottle blank is stretched through the bottom of the stretching rod 4. When the first slider 2 moves downward to the lower end point, the linkage device switches from the sealing position to the stretching position.

[0048] After bottle blowing is completed, the driving unit 5 drives the first slider 2 to rise. Since the first rotor 3 moves upward in the straight section 1112, only the first slider 2 and the stretching rod 4 move upward, and the second slider 8 and the third slider 11 remain stationary. When the first rotor 3 moves upward to the top of the straight section 1112, the linkage device switches from the stretching position to the sealing position; the driving unit 5 continues to drive the first slider 2 to rise. Since the first rotor 3 rolls and moves upward in the first inclined section 1111, the third slider 11 is driven to move backward along the second direction (i.e. Figure 1 The third slider 11 drives the second slider 8 to move upward through the second rotor 9. When the second slider 8 moves upward to the upper starting point (that is, the first rotor 3 moves upward to the top of the first inclined section 1111), the first slider 2 also moves upward to the upper starting point, and the linkage device switches from the sealing position to the initial position.

[0049] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A stretching and sealing linkage device for a bottle blowing machine, comprising a bracket, a first guide rail arranged on the bracket, a stretching mechanism and a sealing mechanism, wherein the first guide rail extends along a first direction, and is characterized in that: The stretching mechanism comprises a first slider slidably disposed on the first guide rail, a first rotor rotatable around its own axis and disposed on the first slider, a stretching rod connected to the first slider, and a driving unit disposed on the bracket and used for driving the first slider to slide; The sealing mechanism comprises a sealing cylinder arranged on the bracket, a sealing shaft movable along a first direction and passing through the sealing cylinder, a second slider slidably arranged on the first guide rail and used to connect the sealing shaft, a second rotor rotatable around its own axis and arranged on the second slider, a second guide rail arranged on the bracket and extending along a second direction, and a third slider slidably arranged on the second guide rail; The third sliding block is provided with a first cam curve and a second cam curve for respectively cooperating with the first rotor and the second rotor to roll; the first cam curve comprises a first inclined segment and a straight segment sequentially connected along a first direction; the second cam curve comprises a second inclined segment; the straight segment is parallel to the first direction, the direction of the line between the two end points of the first inclined segment is at an angle to the first direction and the second direction respectively, and the inclination trend of the second inclined segment is the same as that of the first inclined segment; When the first slider slides relative to the third slider, the first rotor always abuts against the first cam curve; The linkage device has an initial position, a sealing position and a stretching position; When the driving unit drives the first slider to slide in the first direction, the first rotor rolls on the first inclined section and drives the third slider to slide in the second direction. The third slider drives the second slider through the second rotor to drive the sealing shaft to move in the first direction, so that the linkage device switches from the initial position to the sealing position. When the driving unit continues to drive the first slider to slide in the first direction, the first rotor disengages from the first inclined section and rolls in the straight section, the second slider and the third slider remain stationary, and the first slider drives the stretching rod to continue to move in the first direction, so that the linkage device switches from the sealing position to the stretching position; The first direction extends from top to bottom in a vertical direction, and the second direction extends in a horizontal direction; the rotation center lines of the first rotor and the second rotor are parallel to each other and extend in a horizontal direction and are perpendicular to the second direction; The angle of a line connecting two end points of the second inclined segment is different from the angle of a line connecting two end points of the first inclined segment.

2. A stretch sealing linkage device for a bottle blowing machine according to claim 1, characterized in that: The first inclined section is a straight line or a plane curve.

3. A stretch sealing linkage device for a bottle blowing machine according to claim 1, characterized in that: The second inclined section is a straight line or a plane curve.

4. A stretch sealing linkage device for a bottle blowing machine according to claim 1, characterized in that: The first cam curve is a curved groove or a curved flange.

5. The stretch sealing linkage device for a bottle blowing machine according to claim 1, characterized in that: The second cam curve is a curved groove or a curved flange.

6. The stretch sealing linkage device for a bottle blowing machine according to claim 1, characterized in that: The driving unit, the first slider, the second slider, and the sealing cylinder are arranged in sequence along a first direction.

7. A stretch-sealing linkage device for a bottle blowing machine according to claim 6, characterized in that: The stretching rod passes through the second sliding block and the sealing shaft in sequence along a first direction.

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