A single-opening mold and bottom mold lifting linkage mechanism for bottle blowing machine

Abstract

The invention discloses a single-opening mold and bottom mold lifting linkage mechanism for a bottle blowing machine, comprising a mold frame bracket, a fixed side mold, an opening and closing mold rotating shaft arranged on the mold frame bracket and capable of rotating around a first axis, a second axis, and a third axis, a bottom mold bracket, and a driving rotating shaft, a movable side mold arranged on the opening and closing mold rotating shaft, a bottom mold guide rail arranged on the bottom mold bracket, a bottom mold slider arranged on the bottom mold guide rail, a first linkage component arranged between the driving rotating shaft and the movable side mold, a second linkage component arranged between the driving rotating shaft or the movable side mold and the bottom mold bracket, and a first rotor arranged on one of the bottom mold slider and the fixed side mold, and a space cam arranged on the other; the space cam has a cam curve located in a circular arc surface, and the two ends of the cam curve have different heights, and the first rotor can be arranged on the space cam and can roll along the groove or flange of the cam curve. The invention discloses a single-opening mold and bottom mold lifting linkage mechanism for a bottle blowing machine, which has a simple structure and parts that are not easy to wear.

Description

Technical Field

[0001] The invention relates to the technical field of bottle blowing, in particular to a single-opening mold and bottom mold lifting linkage mechanism for a bottle blowing machine. Background Art

[0002] The bottle blowing machine is a key equipment for producing plastic bottles for various liquid packaging. The bottle blowing machine has strict requirements for each process and high requirements for mutual coordination, especially for the synchronous control of the opening and closing movement of the side mold of the single-opening mold and the swinging and lifting movement of the bottom mold.

[0003] In the existing bottle blowing machine, a composite mechanism is formed by a cylindrical cam and a spatial linkage mechanism. The spatial linkage mechanism is used to realize the swing of the bottom mold, and the swinging bottom mold is synchronously lifted and lowered under the drive of the cylindrical cam. Mechanism advantages: simple mechanism and few moving parts. Disadvantages: 1) The bottom mold bracket must realize rotation and lifting motion at the same time, that is, spiral motion, and the connection is easy to wear; 2) Limited by the pitch angle of the joint bearing on the spatial linkage, the bottom mold allows a small lifting stroke, and the types of bottles that can be blown are limited; 3) The length of the spatial linkage is difficult to adjust, and the joint bearing is easy to wear. Summary of the invention

[0004] The invention aims to provide a single-opening mold and bottom mold lifting linkage mechanism for a bottle blowing machine, which has a simple structure, parts that are not easily worn, and a bottom mold slider that allows a large lifting stroke.

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

[0006] A single open mold and bottom mold lifting linkage mechanism for a bottle blowing machine, comprising a mold frame bracket, a fixed edge mold arranged on the mold frame bracket, an opening and closing mold rotating shaft arranged on the mold frame bracket and capable of rotating around a first axis, a second axis, and a third axis, a bottom mold bracket, and a driving rotating shaft;

[0007] The linkage mechanism also includes a movable side mold arranged on the opening and closing mold rotating shaft, a bottom mold guide rail arranged on the bottom mold bracket, and a bottom mold slider slidably arranged on the bottom mold guide rail;

[0008] The linkage mechanism further includes a first linkage component provided between the driving shaft and the movable side mold, and a second linkage component provided between the driving shaft or the movable side mold and the bottom mold support;

[0009] The first linkage assembly is used to link the movable side mold to rotate when the driving shaft rotates, and the second linkage assembly is used to link the bottom mold support to rotate when the driving shaft or the movable side mold rotates;

[0010] The linkage mechanism also includes a first rotor disposed in both the bottom mold slider and the fixed edge mold and rotatable around its own axial centerline, and a spatial cam disposed on the other one; the spatial cam has a cam curve located in a circular arc surface, and the two ends of the cam curve have different heights, and the first rotor can be disposed on the spatial cam and roll along the groove or flange of the cam curve.

[0011] Preferably, the first axis, the second axis, the third axis, and the bottom mold guide rail are parallel to each other.

[0012] Preferably, the first rotor is arranged on the bottom mold slider, and the rotation radius of the first rotor around the second axis is the same as the arc radius of the cam curve.

[0013] Preferably, the first linkage assembly includes a side mold swing arm arranged on the driving shaft, and a side mold connecting rod with two ends respectively rotatably connected to the side mold swing arm and the movable side mold.

[0014] More preferably, the first axis centerline, the second axis centerline, the third axis centerline, the bottom mold guide rail, and the rotation centerlines at both ends of the side mold connecting rod are parallel to each other.

[0015] Preferably, the second linkage assembly includes a bottom mold swing arm provided on the driving shaft or the movable side mold, and a bottom mold connecting rod whose two ends are rotatably connected to the bottom mold swing arm and the bottom mold bracket respectively.

[0016] More preferably, the first axis centerline, the second axis centerline, the third axis centerline, the bottom mold guide rail, and the rotation centerlines at both ends of the bottom mold connecting rod are parallel to each other.

[0017] Preferably, the linkage mechanism further comprises a driving swing arm arranged on the driving shaft, and a second rotor arranged on the driving swing arm and rotatable around its own axial line direction and used to be driven by the mold opening and closing cam.

[0018] More preferably, the first axis centerline, the second axis centerline, the third axis centerline, the bottom mold guide rail, and the rotation centerline of the second rotor are parallel to each other.

[0019] Preferably, the bottom mold slide is provided with a bottom mold, the side mold includes the movable side mold and the fixed side mold, and one of the bottom mold and the side mold is provided with a wedge-shaped ring groove, and the other is provided with a wedge-shaped clamping ring for clamping into the wedge-shaped ring groove;

[0020] When opening the mold, the bottom mold bracket swings until the wedge-shaped ring groove is completely separated from the wedge-shaped snap ring, and the linkage mechanism controls the bottom mold to be stationary in the vertical direction or to generate a displacement smaller than the gap between the wedge-shaped snap ring and the wedge-shaped ring groove, thereby forming a rest period of the bottom mold movement in the vertical direction; after the bottom mold bracket swings until the wedge-shaped ring groove is separated from the wedge-shaped snap ring, the linkage mechanism controls the bottom mold to move downward in the vertical direction with a larger displacement, thereby making the bottle-taking movement of the bottle-taking mechanism have no interference with the bottom mold;

[0021] When the mold is closed, as the bottom mold bracket swings, the linkage mechanism controls the bottom mold to rise a large displacement in the vertical direction until the wedge-shaped retaining ring can enter the wedge-shaped ring groove; after the wedge-shaped retaining ring enters the wedge-shaped ring groove and before it is fully engaged, the linkage mechanism controls the bottom mold to be stationary in the vertical direction or to generate a displacement smaller than the gap between the wedge-shaped retaining ring and the wedge-shaped ring groove, thereby forming a rest period for the bottom mold movement in the vertical 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 is a single-opening mold and bottom mold lifting linkage mechanism for a bottle blowing machine, in which the movable side mold is lifted and lowered by linking the bottom mold slider with the first rotor and the space cam, with a simple structure, fewer moving components, and more convenient adjustment and installation; the bottom mold bracket performs a rotational motion, and the bottom mold slider performs a lifting motion on the bottom mold bracket, which can avoid the problem of easy wear of the connection caused by the spiral motion of the bottom mold bracket; by setting the inclination degree of the cam curve, the lifting stroke of the bottom mold slider can be controlled, and more bottle shapes can be blown. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Attached Figure 1 The structure of the linkage mechanism according to a specific embodiment of the present invention is shown in FIG. Figure 1 (Mold closing state);

[0024] Attached Figure 2 The structure of the linkage mechanism according to a specific embodiment of the present invention is shown in FIG. Figure 2 (Mold closing state);

[0025] Attached Figure 3 The structure of the linkage mechanism according to a specific embodiment of the present invention is shown in FIG. Figure 3 (Mold opening state);

[0026] Attached Figure 4 The structure of the linkage mechanism according to a specific embodiment of the present invention is shown in FIG. Figure 4 (Mold opening state).

[0027] Among them: 1. mold frame bracket; 2. fixed side mold; 3. opening and closing mold shaft; 4. bottom mold bracket; 5. driving shaft; 6. moving side mold; 7. bottom mold guide rail; 8. bottom mold slider; 9. first rotor; 10. space cam; 101. cam curve; 11. side mold swing arm; 12. side mold connecting rod; 13. bottom mold swing arm; 14. bottom mold connecting rod; 15. driving swing arm; 16. second rotor. 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 1-4 As shown, this embodiment provides a single-opening mold and bottom mold lifting linkage mechanism for a bottle blowing machine, comprising a mold frame bracket 1, a fixed edge mold 2 connected to the mold frame bracket 1, an opening and closing mold rotating shaft 3 rotatable around a first axis and arranged on the mold frame bracket 1, a bottom mold bracket 4 rotatable around a second axis and arranged on the mold frame bracket 1, and a driving rotating shaft 5 rotatable around a third axis and arranged on the mold frame bracket 1. In this embodiment, the first axis, the second axis, and the third axis all extend in the vertical direction.

[0030] The above-mentioned single mold opening and bottom mold lifting linkage mechanism of the bottle blowing machine also includes a movable side mold 6 connected to the mold opening and closing rotating shaft 3, a bottom mold guide rail 7 provided on the bottom mold bracket 4, and a bottom mold slider 8 provided on the bottom mold guide rail 7 and slidable along the length extension direction of the bottom mold guide rail 7. When the mold opening and closing rotating shaft 3 rotates, the movable side mold 6 is driven to rotate synchronously, and the movable side mold 6 rotates relative to the fixed side mold 2 to realize mold opening or mold closing. In this embodiment, the bottom mold guide rail 7 extends in the vertical direction.

[0031] See also Figure 1 As shown, the above-mentioned single mold opening and bottom mold lifting linkage mechanism of the bottle blowing machine also includes a driving swing arm 15 connected to the driving shaft 5, and a second rotor 16 arranged on the driving swing arm 15 and rotatable around its own axis. The second rotor 16 is driven by the mold opening and closing cam (not shown in the figure) to drive the driving swing arm 15 to rotate around the third axis, so that the driving shaft 5 can rotate around the third axis synchronously to provide power for opening and closing the mold and lifting and lowering the bottom mold. In this embodiment, the rotation centerline of the second rotor 16 extends in the vertical direction.

[0032] The above-mentioned single mold opening and bottom mold lifting linkage mechanism of the bottle blowing machine also includes a first linkage component arranged between the driving shaft 5 and the movable side mold 6, and a second linkage component arranged between the driving shaft 5 or the movable side mold 6 and the bottom mold bracket 4. The first linkage component is used to link the movable side mold 6 to rotate to open or close the mold when the driving shaft 5 rotates; the second linkage component is used to link the bottom mold bracket 4 to rotate to cooperate with the mold opening or closing when the driving shaft 5 or the movable side mold 6 rotates.

[0033] See also Figure 1 As shown, in this embodiment, the first linkage assembly includes a side mold swing arm 11 connected to the driving shaft 5, and a side mold connecting rod 12 whose two ends are respectively rotatably connected to the side mold swing arm 11 and the movable side mold 6. When the driving shaft 5 rotates, the movable side mold 6 rotates around the first axis through the side mold swing arm 11 and the side mold connecting rod 12. The side mold connecting rod 12 extends in the horizontal direction, and the rotation center lines at both ends of the side mold connecting rod 12 extend in the vertical direction.

[0034] See also Figure 1 As shown, in this embodiment, the second linkage assembly includes a bottom mold swing arm 13 connected to the driving shaft 5, and a bottom mold connecting rod 14 whose two ends are respectively rotatably connected to the bottom mold swing arm 13 and the bottom mold bracket 4. When the driving shaft 5 rotates, the bottom mold bracket 4 rotates around the second axis through the bottom mold swing arm 13 and the bottom mold connecting rod 14. The bottom mold connecting rod 14 extends in the horizontal direction, and the rotation center lines at both ends of the bottom mold connecting rod 14 extend in the vertical direction.

[0035] The above-mentioned single-opening mold and bottom mold lifting linkage mechanism of the bottle blowing machine also includes a first rotor 9 on one of the bottom mold slider 8 and the fixed edge mold 2 and rotatable around its own axial center line, and a spatial cam 10 on the other one.

[0036] See also Figure 1 As shown, in this embodiment, the first rotor 9 is rotatable around its own axis and is arranged on the bottom mold slider 8, and the space cam 10 is arranged on the fixed edge mold 2. Since the fixed edge mold 2 is arranged on the mold frame bracket 1, the space cam 10 can also be arranged on the mold frame bracket 1.

[0037] The above-mentioned space cam 10 has a cam curve 101 located in the circular arc surface. The circular arc surface where the cam curve 101 is located has a rotation center line that is the second axis line. The two ends of the cam curve 101 have different heights. The first rotor 9 can be arranged on the space cam 10 to roll along the groove or flange of the cam curve 101. When the angle of rotation of the first rotor 9 around the second axis line remains unchanged, by setting the inclination of the cam curve 101, the lifting stroke of the bottom mold slider 8 can be controlled according to the bottle shape. The axis line of the first rotor 9 extends in the horizontal direction, and the rotation radius of the first rotor 9 as a whole around the second axis line is the same as the radius of the circular arc surface where the cam curve 101 is located.

[0038] The bottom mold swing arm 13 and the driving swing arm 15 connected to the driving shaft 5 or the movable side mold 6 connected thereto, the bottom mold bracket 4, the bottom mold connecting rod 14, and the mold frame bracket 1 constitute a first planar four-bar linkage.

[0039] The mechanism formed by the bottom mold support 4 and the bottom mold guide rail 7 connected thereto, the bottom mold slide block 8, the mold frame support 1 and the fixed edge mold 2 connected thereto and the space cam 10 is a space cam slide block mechanism;

[0040] The link mechanism composed of the movable side mold 6, the side mold connecting rod 12, the side mold swing arm 11 and the driving swing arm 15 connected to the driving shaft 5, the mold frame bracket 1 and the fixed side mold 2 connected to the side mold 11 is a second planar four-bar linkage.

[0041] The first planar four-bar linkage and the spatial cam slider mechanism are connected in series to form a series bottom mold swing lifting mechanism, which is then combined with the second planar four-bar linkage to obtain the above-mentioned single-opening mold and bottom mold lifting linkage mechanism for the bottle blowing machine.

[0042] The bottom mold slider 8 is provided with a bottom mold, and one of the bottom mold and the side mold (including the movable side mold 6 and the fixed side mold 2) is provided with a wedge-shaped ring groove, and the other is provided with a wedge-shaped clamping ring for clamping into the wedge-shaped ring groove.

[0043] When the mold is opened, the movable side mold 6 is driven to open gradually by driving the swing arm 15, and at the same time, the bottom mold bracket 4 is driven to swing toward the movable side mold 6, until the wedge-shaped ring groove and the wedge-shaped clamping ring are completely separated, and the tandem bottom mold swing lifting mechanism controls the bottom mold to be stationary in the vertical direction or the displacement generated is smaller than the gap between the wedge-shaped clamping ring and the wedge-shaped ring groove, forming a rest period of the bottom mold movement in the vertical direction; after the bottom mold bracket 4 swings to the wedge-shaped ring groove and the wedge-shaped clamping ring are separated, the tandem bottom mold swing lifting mechanism controls the bottom mold to move downward in the vertical direction with a large displacement, so that the bottle-taking movement of the bottle-taking mechanism has no interference with the bottom mold, and after the mold opening is completed, as shown in FIG. Figure 3-4 As shown;

[0044] When closing the mold, the swing arm 15 is driven to drive the movable side mold 6 to close gradually, and at the same time, the bottom mold bracket 4 is driven to swing toward the fixed side mold 2. As the bottom mold bracket 4 swings, the tandem bottom mold swing lifting mechanism controls the bottom mold to move up a large displacement in the vertical direction until the wedge-shaped clamping ring can enter the wedge-shaped ring groove; after the wedge-shaped clamping ring enters the wedge-shaped ring groove until it is completely aligned, the tandem bottom mold swing lifting mechanism controls the bottom mold to be stationary in the vertical direction or the displacement generated is smaller than the gap between the wedge-shaped clamping ring and the wedge-shaped ring groove, forming a rest period of the bottom mold movement in the vertical direction. After the mold closing is completed, Figure 1-2 shown.

[0045] 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 single-opening mold and bottom mold lifting linkage mechanism for a bottle blowing machine, characterized in that: It comprises a mold frame support, a fixed edge mold arranged on the mold frame support, an opening and closing mold rotating shaft arranged on the mold frame support and capable of rotating around a first axis, a second axis, and a third axis respectively, a bottom mold support, and a driving rotating shaft; The linkage mechanism also includes a movable side mold arranged on the opening and closing mold rotating shaft, a bottom mold guide rail arranged on the bottom mold bracket, and a bottom mold slider slidably arranged on the bottom mold guide rail; The linkage mechanism further includes a first linkage component provided between the driving shaft and the movable side mold, and a second linkage component provided between the driving shaft or the movable side mold and the bottom mold support; The first linkage assembly is used to link the movable side mold to rotate when the driving shaft rotates, and the second linkage assembly is used to link the bottom mold support to rotate when the driving shaft or the movable side mold rotates; The linkage mechanism further includes a first rotor disposed in the bottom mold slider and the fixed edge mold and rotatable around its own axis, and a space cam disposed in the other; the space cam has a cam curve located in an arc surface, and the two ends of the cam curve have different heights, and the first rotor is disposed on the space cam and can roll along the groove or flange of the cam curve; The second linkage assembly includes a bottom mold swing arm provided on the driving shaft or the movable side mold, and a bottom mold connecting rod with two ends rotatably connected to the bottom mold swing arm and the bottom mold bracket respectively; The linkage mechanism further comprises a driving swing arm disposed on the driving shaft, and a second rotor disposed on the driving swing arm and rotatable around its own axis and used to be driven by the mold opening and closing cam; The bottom mold slider is provided with a bottom mold, and the side mold includes the movable side mold and the fixed side mold. One of the bottom mold and the side mold is provided with a wedge-shaped ring groove, and the other is provided with a wedge-shaped clamping ring for clamping into the wedge-shaped ring groove. When opening the mold, the bottom mold support swings until the wedge-shaped ring groove is completely separated from the wedge-shaped snap ring, and the linkage mechanism controls the bottom mold to be stationary in the vertical direction or to generate a displacement smaller than the gap between the wedge-shaped snap ring and the wedge-shaped ring groove, thereby forming a rest period of the bottom mold movement in the vertical direction; after the bottom mold support swings until the wedge-shaped ring groove is separated from the wedge-shaped snap ring, the linkage mechanism controls the bottom mold to move downward in the vertical direction for a certain displacement, thereby making the bottle-taking movement of the bottle-taking mechanism have no interference with the bottom mold; When the mold is closed, as the bottom mold bracket swings, the linkage mechanism controls the bottom mold to rise a certain displacement in the vertical direction until the wedge-shaped retaining ring can enter the wedge-shaped ring groove; after the wedge-shaped retaining ring enters the wedge-shaped ring groove and before it is fully engaged, the linkage mechanism controls the bottom mold to be stationary in the vertical direction or to generate a displacement smaller than the gap between the wedge-shaped retaining ring and the wedge-shaped ring groove, thereby forming a rest period of the bottom mold movement in the vertical direction.

2. A single-opening mold and bottom mold lifting linkage mechanism for a bottle blowing machine according to claim 1, characterized in that: The first axis, the second axis, the third axis, and the bottom mold guide rail are parallel to each other.

3. The single-opening mold and bottom mold lifting linkage mechanism of a bottle blowing machine according to claim 1, characterized in that: The first rotor is arranged on the bottom mold sliding block, and the rotation radius of the first rotor around the second axis is the same as the arc radius of the cam curve.

4. The single-opening mold and bottom mold lifting linkage mechanism of a bottle blowing machine according to claim 1, characterized in that: The first linkage assembly comprises a side mold swing arm disposed on the driving shaft, and a side mold connecting rod whose two ends are rotatably connected to the side mold swing arm and the movable side mold.

5. The single-opening mold and bottom mold lifting linkage mechanism of a bottle blowing machine according to claim 4, characterized in that: The first axis centerline, the second axis centerline, the third axis centerline, the bottom mold guide rail, and the rotation centerlines at both ends of the side mold connecting rod are parallel to each other.

6. The single-opening mold and bottom mold lifting linkage mechanism of a bottle blowing machine according to claim 1, characterized in that: The first axis centerline, the second axis centerline, the third axis centerline, the bottom mold guide rail, and the rotation centerlines at both ends of the bottom mold connecting rod are parallel to each other.

7. The single-opening mold and bottom mold lifting linkage mechanism of a bottle blowing machine according to claim 1, characterized in that: The first axis, the second axis, the third axis, the bottom mold guide rail, and the rotation centerline of the second rotor are parallel to each other.

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