A full-link bottom mold lifting mechanism for single-opening mold of bottle blowing machine

Abstract

The present invention discloses a full-link type bottom mold lifting mechanism for a single-opening mold of a bottle blowing machine, comprising a mold frame support, a bottom mold support arranged on the mold frame support and rotatable around a first axis, a bottom mold guide rail fixed on the bottom mold support, a bottom mold slide block arranged on the bottom mold guide rail and rotatable, a bottom mold fixed on the bottom mold slide block, a bottom mold swing rod arranged on the bottom mold support and rotatable around a second axis, a space connecting rod with spherical surfaces respectively connected to the mold frame support and the other end of the bottom mold swing rod through joint bearings fixed thereon at both ends, a bottom mold crank fixed on the bottom mold swing rod at one end, and a bottom mold pull rod respectively rotatably connected to the other end of the bottom mold crank and the bottom mold slide block at both ends. The full-link type bottom mold lifting mechanism of the present invention can accurately control the movement law of the bottom mold, has a small dynamic load, can effectively reduce the vibration and impact of the mechanism, reduce the wear of parts, enhance the movement stability and reliability of the bottle blowing machine, and improve the high-speed performance of the whole machine.

Description

Technical Field

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

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

[0003] In the existing bottle blowing machines, the swinging bottom mold is driven by the cylindrical space cam to achieve lifting and lowering. Advantages: simple mechanism and few moving parts. Disadvantages: 1) The design and processing accuracy of the cam flange or groove profile of the cylindrical space cam is high, the installation and positioning of the cam is difficult, and the rotor is easy to get stuck; 2) The contact surface between the rotor and the cam profile is easy to form point contact, the compressive stress is large, the rotor is easy to be damaged or the cam profile surface is easy to wear; 3) Due to the limitation of space size, the cam pressure angle is usually large, and similarly, the rotor is easy to be damaged or the cam profile surface is easy to wear. Summary of the invention

[0004] The purpose of the present invention is to provide a full-linkage bottom mold lifting mechanism for a single-opening mold of a bottle blowing machine, which can accurately control the movement law of the bottom mold, has a small dynamic load, can effectively reduce the vibration and impact of the mechanism, reduce the wear of parts, enhance the movement stability and reliability of the bottle blowing machine, and improve the high-speed performance of the whole machine.

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

[0006] A full-link type bottom mold lifting mechanism for a single-opening mold of a bottle blowing machine, comprising a mold frame bracket, a bottom mold bracket rotatable around a first axis and arranged on the mold frame bracket, a bottom mold guide rail fixedly arranged on the bottom mold bracket, a bottom mold slider arranged on the bottom mold guide rail and capable of being lifted and lowered, a bottom mold fixedly connected to the bottom mold slider, a bottom mold swing rod rotatable around a second axis and arranged on the bottom mold bracket at one end, a space connecting rod spherically hinged to the mold frame bracket and the other end of the bottom mold swing rod through joint bearings fixedly connected thereto at two ends, a bottom mold crank fixedly connected to the bottom mold swing rod at one end, and a bottom mold pull rod rotatably connected to the other end of the bottom mold crank and the bottom mold slider at two ends;

[0007] The mechanism composed of the mold frame support, the bottom mold support, the bottom mold swing rod, and the spatial connecting rod is a spatial four-bar linkage;

[0008] The mechanism composed of the bottom mold crank, the bottom mold pull rod, the bottom mold slider and the bottom mold fixed thereon, the bottom mold bracket and the bottom mold guide rail fixed thereon is a plane crank slider mechanism;

[0009] The full-link type bottom mold lifting mechanism is formed by the series connection of the spatial four-link mechanism and the planar crank slider mechanism.

[0010] Preferably, the first axis is perpendicular to the second axis.

[0011] Preferably, the angle between the movement plane of the bottom mold swing arm relative to the bottom mold bracket and the spatial connecting rod is α, wherein -30°≤α≤30°.

[0012] Preferably, when the bottom mold is at the upper starting point, the angle between the bottom mold crank and the bottom mold pull rod is β, wherein 170°≤β<180°.

[0013] Preferably, the bottom mold support is used to rotate counterclockwise around the first axis to open the mold, and the hinge point of the spatial connecting rod on the mold frame support is located in the positive or reverse direction of the bottom mold support's mold opening rotation direction.

[0014] Preferably, the bottom mold support is used to rotate clockwise around the first axis to open the mold, and the hinge point of the spatial connecting rod on the mold frame support is located in the positive or reverse direction of the bottom mold support's mold opening rotation direction.

[0015] More preferably, the angle between the bottom mold rocker arm and the bottom mold crank is γ, wherein 0<γ<180°.

[0016] 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 full-linkage bottom mold lifting mechanism for a single-opening mold of a bottle blowing machine, which can accurately control the movement law of the bottom mold, has a small dynamic load, can effectively reduce the vibration and impact of the mechanism, reduce the wear of parts, enhance the movement stability and reliability of the bottle blowing machine, and improve the high-speed performance of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 The structure of the device embodiment 1 of the present invention is shown in FIG. Figure 1 (Mold opening state);

[0018] Attached Figure 2 The structure of the device embodiment 1 of the present invention is shown in FIG. Figure 2 (Mold closing state);

[0019] Attached Figure 3 The structure of the device embodiment 1 of the present invention is shown in FIG. Figure 3 (Mold closing state);

[0020] Attached Figure 4 The structure of the device embodiment 1 of the present invention is shown in FIG. Figure 4 (Mold closing state);

[0021] Attached Figure 5The kinematics of the planar crank slider mechanism are shown in Figure 2. Figure 1 ;

[0022] Attached Figure 6 The kinematics of the planar crank slider mechanism are shown in Figure 2. Figure 2 ;

[0023] Attached Figure 7 The kinematics of the planar crank slider mechanism are shown in Figure 2. Figure 3 ;

[0024] Attached Figure 8 The kinematics of the planar crank slider mechanism are shown in Figure 2. Figure 4 .

[0025] Among them: 1. mold frame bracket; 2. first axis; 3. bottom mold bracket; 4. bottom mold guide rail; 5. bottom mold slider; 6. bottom mold; 7. second axis; 8. bottom mold rocker; 9. joint bearing; 10. space connecting rod; 11. bottom mold crank; 12. bottom mold pull rod. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0027] See also Figure 1-4 As shown, the above-mentioned full-linkage type bottom mold lifting mechanism for a single-opening mold of a bottle blowing machine includes a mold frame bracket 1, a bottom mold bracket 3 arranged on the mold frame bracket 1 and rotatable around a first axis 2, a bottom mold guide rail 4 fixedly arranged on the bottom mold bracket 3, a bottom mold slider 5 arranged on the bottom mold guide rail 4 and slidable and liftable in a vertical direction, a bottom mold 6 fixedly connected to the bottom mold slider 5, a bottom mold swing rod 8 arranged on the bottom mold bracket 3 and rotatable around a second axis 7 at one end, a spatial connecting rod 10 with spherical hinges on the mold frame bracket 1 and the other end of the bottom mold swing rod 8 respectively through joint bearings 9 fixedly connected thereto at both ends, a bottom mold crank 11 fixedly connected to the bottom mold swing rod 8 at one end, and a bottom mold pull rod 12 rotatably connected to the other end of the bottom mold crank 11 and the bottom mold slider 5 at both ends.

[0028] The bottom mold support 3 is driven by an independent driving mechanism or a driving mechanism linked to the opening and closing movements of the single mold, so as to rotate around the first axis 2 .

[0029] The mechanism composed of the mold frame support 1, the bottom mold support 3, the bottom mold rocker arm 8, and the spatial connecting rod 10 is a spatial four-bar linkage mechanism; the mechanism composed of the bottom mold crank 11, the bottom mold pull rod 12, the bottom mold slider 5 and the bottom mold 6 fixed thereto, the bottom mold support 3 and the bottom mold guide rail 4 fixed thereto is a plane crank slider mechanism; the series connection of the above-mentioned spatial four-bar linkage mechanism and the above-mentioned plane crank slider mechanism constitutes a full-linkage bottom mold lifting mechanism.

[0030] By setting up the full-link bottom mold lifting mechanism, the bottom mold 6 can be lifted and lowered in linkage while the bottom mold 6 swings, so the movement law of the bottom mold 6 can be accurately controlled, the dynamic load is small, the vibration and impact of the mechanism can be effectively reduced, the wear of parts can be reduced, the movement stability and reliability of the bottle blowing machine can be enhanced, and the high-speed performance of the whole machine can be improved.

[0031] In this embodiment, the first axis 2 extends in the vertical direction, the second axis 7 extends in the horizontal direction, and the first axis 2 is perpendicular to the second axis 7, that is, the movement plane of the bottom mold rocker arm 8 relative to the bottom mold bracket 3 is perpendicular to the movement plane of the bottom mold bracket 3.

[0032] The included angle between the bottom mold swing arm 8 and the motion plane of the bottom mold support 3 and the spatial connecting rod 10 is α, where -30°≤α≤30°. In this embodiment, -5°≤α≤5°. The spatial connecting rod 10 mentioned here is a common connecting rod, which moves in three-dimensional space through the joint bearings 9 at both ends.

[0033] When the bottom mold 6 is at the upper starting point, the angle between the bottom mold crank 11 and the bottom mold pull rod 12 is β, wherein 170°≤β<180°. In this embodiment, 175°≤β<180°.

[0034] In the bottom mold 6 and the side mold (including the movable side mold and the fixed side mold), one 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.

[0035] When opening the mold, the bottom mold bracket 3 swings until the wedge-shaped ring groove and the wedge-shaped retaining ring are completely separated, and the full-link bottom mold lifting mechanism controls the displacement of the bottom mold 6 in the vertical direction to be smaller than the gap between the wedge-shaped retaining ring and the wedge-shaped ring groove, forming an approximate rest period for the bottom mold 6 to move in the vertical direction; after the bottom mold bracket 3 swings until the wedge-shaped ring groove and the wedge-shaped retaining ring are separated, the full-link bottom mold lifting mechanism controls the bottom mold 6 to descend in the vertical direction with a larger displacement, so that the bottle-picking movement of the bottle-picking mechanism does not interfere with the bottom mold 6.

[0036] When closing the mold, as the bottom mold bracket 3 swings, the full-link bottom mold lifting mechanism controls the bottom mold 6 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, as the bottom mold bracket 3 continues to swing, the full-link bottom mold lifting mechanism controls the bottom mold 6 to produce a vertical displacement that is smaller than the gap between the wedge-shaped retaining ring and the wedge-shaped ring groove, forming an approximate rest period for the bottom mold 6 to move in the vertical direction.

[0037] By setting the β angle, at the initial stage of mold opening, as the bottom mold support 3 swings, β gradually increases to 180°, and then gradually decreases, forming an approximate rest period for the bottom mold 6 moving in the vertical direction; in the mold closing stage, as the bottom mold support 3 swings, β gradually increases to 180°, and then gradually decreases, also forming an approximate rest period for the bottom mold 6 moving in the vertical direction.

[0038] See also Figure 4 As shown, in Example 1, when the mold is opened, the bottom mold support 3 swings counterclockwise, and the hinge point of the spatial connecting rod 10 on the mold support 1 is located in the opposite direction of the mold opening rotation direction of the bottom mold support 3, that is, the hinge point of the spatial connecting rod 10 on the mold support 1 is located on the left side of the first axis 2. The bottom mold swing rod 8 is fixedly connected to the bottom mold crank 11 at an acute angle γ. Figure 5 As shown, when the mold is opened, the bottom mold bracket 3 swings counterclockwise, the spatial connecting rod 10 pulls the bottom mold rocker 8 to rotate counterclockwise, and the bottom mold crank 11 fixedly connected to the bottom mold rocker 8 rotates counterclockwise, driving the bottom mold slider 5 to move, and the bottom mold slider 5 almost stops and then quickly drops; when the mold is closed, the bottom mold bracket 3 swings clockwise, the spatial connecting rod 10 pushes the bottom mold rocker 8 to rotate clockwise, and the bottom mold crank 11 fixedly connected to the bottom mold rocker 8 rotates clockwise, driving the bottom mold slider 5 to move, and the bottom mold slider 5 quickly rises and then almost stops.

[0039] In Example 2, when the mold is opened, the bottom mold support 3 swings counterclockwise, and the hinge point of the spatial connecting rod 10 on the mold support 1 is located in the opposite direction of the mold opening rotation direction of the bottom mold support 3, that is, the hinge point of the spatial connecting rod 10 on the mold support 1 is located on the left side of the first axis 2. The bottom mold swing rod 8 is fixedly connected to the bottom mold crank 11 at an obtuse angle γ. Figure 6 As shown, when the mold is opened, the bottom mold bracket 3 swings counterclockwise, the spatial connecting rod 10 pulls the bottom mold rocker 8 to rotate clockwise, and the bottom mold crank 11 fixedly connected to the bottom mold rocker 8 rotates clockwise, driving the bottom mold slider 5 to move, and the bottom mold slider 5 almost stops and then quickly drops; when the mold is closed, the bottom mold bracket 3 swings clockwise, the spatial connecting rod 10 pushes the bottom mold rocker 8 to rotate counterclockwise, and the bottom mold crank 11 fixedly connected to the bottom mold rocker 8 rotates counterclockwise, driving the bottom mold slider 5 to move, and the bottom mold slider 5 quickly rises and then almost stops.

[0040] In Example 3, when the mold is opened, the bottom mold support 3 swings counterclockwise, and the hinge point of the spatial connecting rod 10 on the mold support 1 is located in the positive direction of the mold opening rotation direction of the bottom mold support 3, that is, the hinge point of the spatial connecting rod 10 on the mold support 1 is located on the right side of the first axis 2. The bottom mold swing rod 8 is fixedly connected to the bottom mold crank 11 at an acute angle γ. Figure 7 As shown, when the mold is opened, the bottom mold bracket 3 swings counterclockwise, the spatial connecting rod 10 pushes the bottom mold rocker arm 8 to rotate clockwise, and the bottom mold crank 11 fixedly connected to the bottom mold rocker arm 8 rotates clockwise, driving the bottom mold slider 5 to move, and the bottom mold slider 5 almost stops and then quickly drops; when the mold is closed, the bottom mold bracket 3 swings clockwise, the spatial connecting rod 10 pulls the bottom mold rocker arm 8 to rotate counterclockwise, and the bottom mold crank 11 fixedly connected to the bottom mold rocker arm 8 rotates counterclockwise, driving the bottom mold slider 5 to move, and the bottom mold slider 5 quickly rises and then almost stops.

[0041] In Example 4, when the mold is opened, the bottom mold support 3 swings counterclockwise, and the hinge point of the spatial connecting rod 10 on the mold support 1 is located in the positive direction of the mold opening rotation direction of the bottom mold support 3, that is, the hinge point of the spatial connecting rod 10 on the mold support 1 is located on the right side of the first axis 2. The bottom mold swing rod 8 is fixedly connected to the bottom mold crank 11 at an obtuse angle γ. Figure 8 As shown, when the mold is opened, the bottom mold bracket 3 swings counterclockwise, the spatial connecting rod 10 pushes the bottom mold rocker arm 8 to rotate counterclockwise, and the bottom mold crank 11 fixedly connected to the bottom mold rocker arm 8 rotates counterclockwise, driving the bottom mold slider 5 to move, and the bottom mold slider 5 almost stops and then quickly drops; when the mold is closed, the bottom mold bracket 3 swings clockwise, the spatial connecting rod 10 pulls the bottom mold rocker arm 8 to rotate clockwise, and the bottom mold crank 11 fixedly connected to the bottom mold rocker arm 8 rotates clockwise, driving the bottom mold slider 5 to move, and the bottom mold slider 5 quickly rises and then almost stops.

[0042] In Example 5, when the mold is opened, the bottom mold support 3 swings clockwise, and the hinge point of the spatial connecting rod 10 on the mold support 1 is located in the opposite direction of the mold opening rotation direction of the bottom mold support 3, that is, the hinge point of the spatial connecting rod 10 on the mold support 1 is located on the right side of the first axis 2. The bottom mold swing rod 8 is fixedly connected to the bottom mold crank 11 at an acute angle γ. Figure 5 As shown, when the mold is opened, the bottom mold bracket 3 swings clockwise, the spatial connecting rod 10 pulls the bottom mold rocker 8 to rotate counterclockwise, and the bottom mold crank 11 fixedly connected to the bottom mold rocker 8 rotates counterclockwise, driving the bottom mold slider 5 to move, and the bottom mold slider 5 almost stops and then quickly drops; when the mold is closed, the bottom mold bracket 3 swings counterclockwise, the spatial connecting rod 10 pushes the bottom mold rocker 8 to rotate clockwise, and the bottom mold crank 11 fixedly connected to the bottom mold rocker 8 rotates clockwise, driving the bottom mold slider 5 to move, and the bottom mold slider 5 quickly rises and then almost stops.

[0043] In Example 6, when the mold is opened, the bottom mold support 3 swings clockwise, and the hinge point of the spatial connecting rod 10 on the mold support 1 is located in the opposite direction of the mold opening rotation direction of the bottom mold support 3, that is, the hinge point of the spatial connecting rod 10 on the mold support 1 is located on the right side of the first axis 2. The bottom mold swing rod 8 is fixedly connected to the bottom mold crank 11 at an obtuse angle γ. Figure 6 As shown, when the mold is opened, the bottom mold bracket 3 swings clockwise, the spatial connecting rod 10 pulls the bottom mold rocker 8 to rotate clockwise, and the bottom mold crank 11 fixedly connected to the bottom mold rocker 8 rotates clockwise, driving the bottom mold slider 5 to move, and the bottom mold slider 5 almost stops and then quickly drops; when the mold is closed, the bottom mold bracket 3 swings counterclockwise, the spatial connecting rod 10 pushes the bottom mold rocker 8 to rotate counterclockwise, and the bottom mold crank 11 fixedly connected to the bottom mold rocker 8 rotates counterclockwise, driving the bottom mold slider 5 to move, and the bottom mold slider 5 quickly rises and then almost stops.

[0044] In Example 7, when the mold is opened, the bottom mold support 3 swings clockwise, and the hinge point of the spatial connecting rod 10 on the mold support 1 is located in the positive direction of the mold opening rotation direction of the bottom mold support 3, that is, the hinge point of the spatial connecting rod 10 on the mold support 1 is located on the left side of the first axis 2. The bottom mold swing rod 8 is fixedly connected to the bottom mold crank 11 at an acute angle γ. Figure 7 As shown, when the mold is opened, the bottom mold bracket 3 swings clockwise, the spatial connecting rod 10 pushes the bottom mold rocker arm 8 to rotate clockwise, and the bottom mold crank 11 fixedly connected to the bottom mold rocker arm 8 rotates clockwise, driving the bottom mold slider 5 to move, and the bottom mold slider 5 almost stops and then quickly drops; when the mold is closed, the bottom mold bracket 3 swings counterclockwise, the spatial connecting rod 10 pulls the bottom mold rocker arm 8 to rotate counterclockwise, and the bottom mold crank 11 fixedly connected to the bottom mold rocker arm 8 rotates counterclockwise, driving the bottom mold slider 5 to move, and the bottom mold slider 5 quickly rises and then almost stops.

[0045] In Example 8, when the mold is opened, the bottom mold support 3 swings clockwise, and the hinge point of the spatial connecting rod 10 on the mold support 1 is located in the positive direction of the mold opening rotation direction of the bottom mold support 3, that is, the hinge point of the spatial connecting rod 10 on the mold support 1 is located on the left side of the first axis 2. The bottom mold swing rod 8 is fixedly connected to the bottom mold crank 11 at an obtuse angle γ, see Figure 8 As shown, when the mold is opened, the bottom mold bracket 3 swings clockwise, the spatial connecting rod 10 pushes the bottom mold rocker arm 8 to rotate counterclockwise, and the bottom mold crank 11 fixedly connected to the bottom mold rocker arm 8 rotates counterclockwise, driving the bottom mold slider 5 to move, and the bottom mold slider 5 almost stops and then quickly drops; when the mold is closed, the bottom mold bracket 3 swings counterclockwise, the spatial connecting rod 10 pulls the bottom mold rocker arm 8 to rotate clockwise, and the bottom mold crank 11 fixedly connected to the bottom mold rocker arm 8 rotates clockwise, driving the bottom mold slider 5 to move, and the bottom mold slider 5 quickly rises and then almost stops.

[0046] 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 full-link type bottom mold lifting mechanism for a single-opening mold of a bottle blowing machine, comprising a mold frame bracket, a bottom mold bracket rotatable around a first axis and arranged on the mold frame bracket, a bottom mold guide rail fixedly arranged on the bottom mold bracket, a bottom mold slider that can be lifted and lowered and arranged on the bottom mold guide rail, and a bottom mold fixedly connected to the bottom mold slider, characterized in that: The full-link type bottom mold lifting mechanism also includes a bottom mold swing rod disposed on the bottom mold bracket, one end of which can rotate around the second axis, a spatial connecting rod with two ends respectively connected to the mold frame bracket and the other end of the bottom mold swing rod through spherical surfaces corresponding to each other through joint bearings fixed thereon, a bottom mold crank fixedly connected to the bottom mold swing rod at one end, and a bottom mold pull rod rotatably connected to the other end of the bottom mold crank and the bottom mold slider at two ends; The mechanism composed of the mold frame support, the bottom mold support, the bottom mold swing rod, and the spatial connecting rod is a spatial four-bar linkage; The mechanism composed of the bottom mold crank, the bottom mold pull rod, the bottom mold slider and the bottom mold fixed thereon, the bottom mold bracket and the bottom mold guide rail fixed thereon is a plane crank slider mechanism; The full-link type bottom mold lifting mechanism is formed by the series connection of the spatial four-link mechanism and the planar crank slider mechanism.

2. The full-link bottom mold lifting mechanism for a single-opening mold of a bottle blowing machine according to claim 1, characterized in that: The first axis is perpendicular to the second axis.

3. The full-link type bottom mold lifting mechanism for a single-opening mold of a bottle blowing machine according to claim 1, characterized in that: The angle between the bottom mold swing arm and the motion plane of the bottom mold support and the spatial connecting rod is α, wherein -30°≤α≤30°.

4. The full-link type bottom mold lifting mechanism for a single-opening mold of a bottle blowing machine according to claim 1, characterized in that: When the bottom mold is at the upper starting point, the angle between the bottom mold crank and the bottom mold pull rod is β, wherein 170°≤β<180°.

5. The full-link type bottom mold lifting mechanism for a single-opening mold of a bottle blowing machine according to claim 1, characterized in that: The bottom mold support is used to rotate counterclockwise around the first axis to open the mold, and the hinge point of the spatial connecting rod on the mold frame support is located in the positive or reverse direction of the bottom mold support's mold opening rotation direction.

6. The full-link type bottom mold lifting mechanism for a single-opening mold of a bottle blowing machine according to claim 1, characterized in that: The bottom mold support is used to rotate clockwise around the first axis to open the mold, and the hinge point of the spatial connecting rod on the mold frame support is located in the positive or reverse direction of the bottom mold support's mold opening rotation direction.

7. A full-link type bottom mold lifting mechanism for a single-opening mold of a bottle blowing machine according to claim 5 or 6, characterized in that: The angle between the bottom mold rocker and the bottom mold crank is γ, wherein 0<γ<180°.

Images