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 extending in a first direction, a stretching mechanism, and a sealing mechanism; the stretching mechanism comprises a first slider slidably arranged on the first guide rail, a roller arranged on the first slider, a stretching rod connected to the first slider, and a driving unit arranged on the bracket; the sealing mechanism comprises a sealing cylinder arranged on the bracket, a sealing shaft, a second slider slidably arranged on the first guide rail and used to connect the sealing shaft, a second guide rail extending in a second direction, a third slider slidably arranged on the second guide rail, and a first connecting rod rotatably connected to the third slider and the second slider at both ends; the third slider is provided with a cam curve for cooperating with the rolling of the roller, and when the first slider slides relative to the third slider, the roller always abuts against the cam curve. The present invention discloses a stretching and sealing linkage device for a bottle blowing machine, which has high motion accuracy and good motion 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 roller 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 roller 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 purpose of the present invention is to provide a stretch sealing linkage device for a bottle blowing machine, which has fewer equipment parts, 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 roller disposed on the first slider and rotatable around its own axis, 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 guide rail arranged on the bracket and extending along a second direction, a third slider slidably arranged on the second guide rail, and a first connecting rod with two ends rotatably connected to the third slider and the second slider respectively;

[0009] The first slider and the second slider are respectively located at two ends of the third slider along the first direction;

[0010] The third sliding block is provided with a cam curve for cooperating with the rolling of the roller, and the cam curve includes a curved segment extending obliquely from top to bottom and a straight line segment parallel to the first direction, which are sequentially connected along the first direction;

[0011] When the roller rotates in the curved section, the second slider is driven to slide along the first direction through the third slider and the first connecting rod;

[0012] When the first sliding block slides relative to the third sliding block, the roller is always against the cam curve.

[0013] Preferably, the linkage device has an initial position, a sealing position and a stretching position;

[0014] When the driving unit drives the first slider to slide in the first direction, the roller rotates in the curved section and drives the third slider to slide in the second direction, and the second slider is driven by the first connecting rod 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;

[0015] When the driving unit continues to drive the first slider to slide in the first direction, the roller rotates in the straight segment, 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.

[0016] Preferably, the first direction extends vertically from top to bottom, and the second direction extends horizontally; the rotation centerline of the roller extends horizontally and is parallel to the rotation centerlines of both ends of the first connecting rod, and is perpendicular to the second direction.

[0017] More preferably, the second direction extends left and right along the horizontal direction;

[0018] The curved section extends obliquely from the upper right to the lower left, and the upper end of the first connecting rod is connected to the left side of the bottom of the third sliding block and extends obliquely from the upper left to the lower right;

[0019] Or the curved segment extends obliquely from the upper left to the lower right, and the upper end of the first connecting rod is connected to the right side of the bottom of the third sliding block and extends obliquely from the upper right to the lower left.

[0020] More preferably, the rotation center line of the roller extends back and forth in the horizontal direction, and the stretching rod, the first connecting rod, and the third sliding block are arranged in sequence along the direction of the rotation center line of the roller.

[0021] More preferably, the second direction extends forward and backward along the horizontal direction, and the rotation centerline of the roller extends left and right along the horizontal direction;

[0022] The curved section extends obliquely from the front upper to the rear lower direction, and the upper end of the first connecting rod is connected to the rear side of the bottom of the third sliding block and extends obliquely from the rear upper to the front lower direction;

[0023] Or the curved section extends obliquely from the upper rear to the lower front, and the upper end of the first connecting rod is connected to the front side of the bottom of the third sliding block and extends obliquely from the upper front to the lower rear.

[0024] Preferably, the bracket includes a main body, a first guide block and a second guide block arranged on the main body and spaced apart along a first direction, there are two second guide rails, which are respectively arranged in the first guide block and the second guide block, and the third slider can be slidable along the second direction and is arranged between the first guide block and the second guide block.

[0025] More preferably, the first guide block, the first slider, the second guide block and the second slider are arranged in sequence along the first direction, the first slider is provided with a slot hole for being penetrated by the third slider along the first direction, and the roller is arranged in the slot hole.

[0026] Preferably, the stretching rod passes through the second sliding block, the sealing shaft and the sealing cylinder in sequence along the first direction.

[0027] Preferably, the cam curve is a curved groove or a curved flange.

[0028] Preferably, the driving unit is a servo motor or a driving cylinder.

[0029] Due to the application of the above technical scheme, the present invention has the following advantages compared with the prior art: the present invention is a stretching and sealing linkage device for a bottle blowing machine, which has fewer equipment parts and lower debugging difficulty; the sliding of the first slider is linked to the sliding of the third slider and the second slider to respectively achieve stretching and sealing; by setting the shape of the cam curve, it is determined whether the sliding of the first slider is linked to the sliding of the third slider 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 roller is always against the cam curve, and the movement accuracy is high and the movement stability is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Attached Figure 1 is an axonometric diagram of a stretch-seal linkage device according to a specific embodiment of the present invention;

[0031] Attached Figure 2 For attachment Figure 1 Face Figure 1 ;

[0032] Attached Figure 3 For attachment Figure 1 Left side view of the vehicle (the linkage is in the initial position);

[0033] Attached Figure 4 For attachment Figure 1 Face Figure 2 (The linkage device is in the sealing position);

[0034] Attached Figure 5 For attachment Figure 1 Face Figure 3 (linkage in extended position);

[0035] Attached Figure 6 is an enlarged schematic diagram of the first sliding block (top view);

[0036] Attached Figure 7 It is an enlarged schematic diagram of the third slider (front view).

[0037] Among them: 1. bracket; 101. first guide block; 102. second guide block; 2. first guide rail; 3. first slider; 31. slot; 4. roller; 5. stretching rod; 6. driving unit; 7. sealing cylinder; 8. sealing shaft; 9. second slider; 91. second connecting rod; 10. second guide rail; 11. third slider; 12. first connecting rod; 13. cam curve; 131. curve segment; 132. straight line segment. DETAILED DESCRIPTION

[0038] The technical solution of the present invention is further described below in conjunction with specific embodiments and drawings.

[0039] See also Figure 1-7 As 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.

[0040] See also Figure 1-2 As shown, the bracket 1 includes a body, a first guide block 101 and a second guide block 102 arranged on the body and spaced apart along a first direction. The body is provided with a first guide rail 2 extending along the first direction, and the lower surface of the first guide block 101 and the upper surface of the second guide block 102 are respectively provided with a second guide rail 10 extending along the second direction.

[0041] In this embodiment, the first direction is Figure 2 The vertical direction from top to bottom in the second direction is Figure 2The first guide rail 2 is a guide convex rail, and the two second guide rails 10 are guide grooves. The first guide block 101 is located above the second guide block 102, the upper end of the first guide rail 2 is located below the first guide block 101, and the lower end of the first guide rail 2 is located below the second guide block 102, that is, the first guide rail 2 passes through the second guide block 102 downward.

[0042] The stretching mechanism comprises a first slider 3 which is arranged on the first guide rail 2 and can slide along a first direction, a roller 4 which is arranged on the first slider 3 and can rotate around its own axis, a stretching rod 5 which is connected to the first slider 3, and a driving unit 6 which is arranged on the bracket 1 and is used to drive the first slider 3 to slide.

[0043] See also Figure 1-2 As shown in Figures 6, the first slider 3 is located between the first guide block 101 and the second guide block 102; the first slider 3 is provided with a slot 31 penetrating along the first direction, and the roller 4 is arranged in the slot 31; the upper end of the stretching rod 5 is connected to the first slider 3; the driving unit 6 is arranged at the top of the bracket 1 and is located above the first guide block 101, and the driving unit 6 is a servo motor or a driving cylinder.

[0044] The sealing mechanism comprises a sealing cylinder 7 disposed on the bracket 1, a sealing shaft 8 movable along a first direction and passing through the sealing cylinder 7, and a second slider 9 slidable along the first direction and disposed on the first guide rail 2 and used to connect the sealing shaft 8.

[0045] See also Figure 1-2 As shown, the second slider 9 is located below the second guide block 102, and the sealing cylinder 7 is located below the second slider 9; the upper end of the sealing shaft 8 passes through the sealing cylinder 7 upward, and the sealing shaft 8 is connected to the second slider 9 through its upper end, and the lower end of the sealing shaft 8 passes through the sealing cylinder 7 downward, and the sealing shaft 8 seals the preform through its lower end, and the second slider 9 slides up and down, driving the sealing shaft 8 to slide up and down synchronously. The stretching rod 5 passes through the second slider 9, the sealing shaft 8 and the sealing cylinder 7 in sequence along the first direction, and is used to stretch the preform.

[0046] The sealing mechanism further comprises a third slider 11 slidable along the second direction and arranged on the second guide rail 10 , and a first connecting rod 12 with two ends rotatably connected to the third slider 11 and the second slider 9 respectively.

[0047] See also Figure 1-2 As shown, the third slider 11 is inserted into the slot hole 31 of the first slider 3 along the first direction, and the third slider 11 is limited and protected in the left and right directions through the slot hole 31; the upper end of the third slider 11 is inserted into the guide groove on the lower surface of the first guide block 101, and the lower end of the third slider 11 is inserted into the guide groove on the upper surface of the second guide block 102.

[0048] The first guide block 101 , the first slider 3 , the second guide block 102 , and the second slider 9 are arranged in sequence from top to bottom; the upper end of the first connecting rod 12 is rotatably connected to the third slider 11 , and the lower end of the first connecting rod 12 is rotatably connected to the second slider 9 .

[0049] The rotation centerline of the roller 4 extends in the horizontal direction and is parallel to the rotation centerlines of the two ends of the first connecting rod 12, and is perpendicular to the second direction, that is, Figure 2 The front-to-back direction in . Figure 1 As shown, the stretching rod 5 , the first connecting rod 12 , and the third sliding block 11 are arranged in sequence along the rotation center line direction of the roller 4 .

[0050] See also Figure 1-2 As shown in FIGS. 7 and 8 , the third slider 11 is provided with a cam curve 13 for cooperating with the rolling of the roller 4. The cam curve 13 includes a curved segment 131 extending obliquely from top to bottom and connected in sequence along a first direction, and a straight line segment 132 parallel to the first direction.

[0051] In this embodiment, see Figure 7 As shown, the curved section 131 extends obliquely from the upper right to the lower left, the upper end of the first connecting rod 12 is connected to the left side of the bottom of the third sliding block 11, and extends obliquely from the upper left to the lower right; the third sliding block 11 is L-shaped as a whole. Figure 2 As shown, a second connecting rod 91 is fixedly provided on the second sliding block 9 , and the second connecting rod 91 extends obliquely from the lower left to the upper right, and the lower right end of the first connecting rod 12 is rotatably connected to the upper right end of the second connecting rod 91 .

[0052] In Embodiment 2, the curved segment 131 extends obliquely from the upper left to the lower right, and the upper end of the first connecting rod 12 is connected to the right side of the bottom of the third sliding block 11 and extends obliquely from the upper right to the lower left.

[0053] In Example 3, the second direction extends forward and backward in the horizontal direction, and the rotation centerline of the roller 4 extends left and right in the horizontal direction; the curved segment 131 extends obliquely from the front upper direction to the rear lower direction, and the upper end of the first connecting rod 12 is connected to the rear side of the bottom of the third slider 11, and extends obliquely from the rear upper direction to the front lower direction.

[0054] In Example 4, the second direction extends forward and backward along the horizontal direction, and the rotation centerline of the roller 4 extends left and right along the horizontal direction; the curved segment 131 extends obliquely from the upper rear to the lower front direction, and the upper end of the first connecting rod 12 is connected to the front side of the bottom of the third slider 11, and extends obliquely from the upper front to the lower rear direction.

[0055] The cam curve 13 is a curved groove or a curved flange. In this embodiment, the cam curve 13 is a curved groove, and there is only one roller 4, which is arranged in the curved groove. In another embodiment, the cam curve 13 is a curved flange, and there are two rollers 4, which are respectively arranged on both sides of the curved flange.

[0056] The sliding of the first slider 3 links the sliding of the third slider 11 and the second slider 9 to achieve stretching and sealing respectively; by setting the shape of the cam curve 13, it can be realized whether the sliding of the first slider 3 is linked to the sliding of the third slider 11 to avoid interference between the stretching movement and the sealing movement; when the first slider 3 slides relative to the third slider 11, no matter whether the third slider 11 is in a moving state or a stationary state, the roller 4 is always against the cam curve 13, with high movement accuracy and good movement stability.

[0057] In this embodiment, the stretch sealing linkage device for a bottle blowing machine has an initial position ( Figure 3 )、Sealing position( Figure 4 ) and stretched position ( Figure 5 );

[0058] Figure 3 In the figure, the first slider 3 is at the upper starting point, and the second slider 9 is also at the upper starting point;

[0059] Figure 4 In the embodiment, the second slider 9 is at the lower end point;

[0060] Figure 5 In the embodiment, the second slider 9 is at the lower end point, and the first slider 3 is also at the lower end point.

[0061] When blowing the bottle, the driving unit 6 drives the first slider 3 to move downward, and the roller 4 rotates and moves downward in the curved section 131 to drive the third slider 11 to move rightward ( Figure 2 The third slider 11 drives the second slider 9 to move downward through the first connecting rod 12, and the second slider 9 drives the sealing shaft 8 to move downward to seal the preform. When the second slider 9 moves downward to the lower end (that is, when the roller 4 is about to move downward away from the curved section 131), the linkage device switches from the initial position to the sealing position;

[0062] The driving unit 6 continues to drive the first slider 3 to move downward. At this time, the roller 4 rotates and moves downward in the straight section 132. The third slider 11 remains stationary, and the first connecting rod 12 and the second slider 9 also remain stationary. The first slider 3 drives the stretching rod 5 to continue to move downward to stretch the preform. When the first slider 3 moves downward to the lower end point, the linkage device switches from the sealing position to the stretching position.

[0063] After bottle blowing is completed, the driving unit 6 drives the first slider 3 to rise. Since the roller 4 moves upward in the straight section 132, only the first slider 3 and the stretching rod 5 move upward, and the second slider 9 and the third slider 11 remain stationary. When the roller 4 moves upward to the top of the straight section 132, the linkage device switches from the stretching position to the sealing position; the driving unit 6 continues to drive the first slider 3 to rise. Since the roller 4 rotates and moves upward in the curved section 131, the third slider 11 is driven to the left ( Figure 2 The third slider 11 drives the second slider 9 to move upward through the first connecting rod 12. When the second slider 9 moves upward to the upper starting point (that is, when the roller 4 moves upward to the top of the curved segment 131), the first slider 3 also moves upward to the upper starting point, and the linkage device switches from the sealing position to the initial position.

[0064] 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 roller disposed on the first slider and rotatable around its own axis, 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 guide rail arranged on the bracket and extending along a second direction, a third slider slidably arranged on the second guide rail, and a first connecting rod with two ends rotatably connected to the third slider and the second slider respectively; The third sliding block is provided with a cam curve for cooperating with the rolling of the roller, and the cam curve includes a curved segment extending obliquely from top to bottom and a straight line segment parallel to the first direction, which are sequentially connected along the first direction; When the roller rotates in the curved section, the second slider is driven to slide along the first direction through the third slider and the first connecting rod; When the first slider slides relative to the third slider, the roller always abuts against the 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 roller rotates in the curved section and drives the third slider to slide in the second direction, and the second slider is driven by the first connecting rod 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 roller rotates in the straight segment, 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 along the vertical direction, and the second direction extends along the horizontal direction; the rotation centerline of the roller extends along the horizontal direction and is parallel to the rotation centerlines of both ends of the first connecting rod, and is perpendicular to the second direction.

2. A stretch sealing linkage device for a bottle blowing machine according to claim 1, characterized in that: The second direction extends left and right along the horizontal direction; The curved section extends obliquely from the upper right to the lower left, and the upper end of the first connecting rod is connected to the left side of the bottom of the third sliding block and extends obliquely from the upper left to the lower right; Or the curved segment extends obliquely from the upper left to the lower right, and the upper end of the first connecting rod is connected to the right side of the bottom of the third sliding block and extends obliquely from the upper right to the lower left.

3. A stretch sealing linkage device for a bottle blowing machine according to claim 2, characterized in that: The rotation center line of the roller extends forward and backward in the horizontal direction, and the stretching rod, the first connecting rod, and the third sliding block are arranged in sequence along the rotation center line direction of the roller.

4. A stretch sealing linkage device for a bottle blowing machine according to claim 1, characterized in that: The second direction extends forward and backward along the horizontal direction, and the rotation centerline of the roller extends left and right along the horizontal direction; The curved section extends obliquely from the front upper to the rear lower direction, and the upper end of the first connecting rod is connected to the rear side of the bottom of the third sliding block and extends obliquely from the rear upper to the front lower direction; Or the curved section extends obliquely from the upper rear to the lower front, and the upper end of the first connecting rod is connected to the front side of the bottom of the third sliding block and extends obliquely from the upper front to the lower rear.

5. The stretch sealing linkage device for a bottle blowing machine according to claim 1, characterized in that: The bracket includes a main body, a first guide block and a second guide block arranged on the main body and spaced apart along a first direction, two second guide rails are provided, respectively provided in the first guide block and the second guide block, and the third slider is slidable along the second direction and provided between the first guide block and the second guide block.

6. A stretch sealing linkage device for a bottle blowing machine according to claim 5, characterized in that: The first guide block, the first slider, the second guide block and the second slider are arranged in sequence along a first direction. The first slider is provided with a slot hole for being penetrated by the third slider along the first direction, and the roller is arranged in the slot hole.

7. A stretch sealing linkage device for a bottle blowing machine according to claim 1, characterized in that: The stretching rod passes through the second sliding block, the sealing shaft and the sealing cylinder in sequence along a first direction.

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

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