A linkage mold locking mechanism for a single-opening blow molding machine

Abstract

The present invention discloses a linkage mold locking mechanism for a single-opening mold blow molding machine, comprising a mold frame support, a fixed mold frame, a movable mold frame, a first driving assembly for driving the movable mold frame to rotate, a first guide column that can be slidably arranged in the fixed mold frame along the extension direction of its own length, a second driving assembly for driving the first guide column to slide, a first hook hanging member arranged on the first guide column, and a second hook hanging member that can be rotated around the second axis center line on the movable mold frame; when the fixed mold frame and the movable mold frame are in the mold closing position, the second driving assembly is used to drive the first guide column to slide, so that the first hook hanging member and the second hook hanging member are aligned with each other or staggered with each other; the first driving assembly is used to drive the second hook hanging member to rotate away from the first hook hanging member relative to the movable mold frame when the mold is opened, and is also used to drive the second hook hanging member to rotate close to the first hook hanging member relative to the movable mold frame when the mold is closed. The linkage mold locking mechanism for a single-opening mold blow molding machine of the present invention has a small mold frame rotation angle and good dynamic characteristics.

Description

Technical Field

[0001] The present invention relates to the technical field of bottle blowing, and particularly relates to a linkage mold locking mechanism for a single-opening mold bottle blowing machine. Background Art

[0002] The existing mold locking mechanisms of bottle blowing machines generally have the following three structures:

[0003] The first one is that the front ends of the left and right molds overlap staggeredly. A pin on one mold is inserted into a hole on the other mold to lock the two molds; or a rotating shaft on one mold rotates and snaps into a groove on the other mold to lock the two molds. Disadvantages: 1. The overlapping part at the front ends of the left and right molds is relatively large, and the mold must be opened at a large angle to take out the bottle; 2. The rotation angle of the mold is large, and the dynamic characteristics are poor; 3. The mold closing acceleration is large, the noise is large, and the impact is large, which affects the speed increase and efficiency improvement of the bottle blowing machine.

[0004] The second one is that a buckle plate on one mold rotates and latches into the buckle plate on the other mold to lock the two molds. Disadvantages: 1. A gap needs to be left at the latching part of the buckle plates, and a relatively strong spring return torque is required to wedge the buckle plates tightly, with relatively high design requirements; 2. The buckle plates rotate and latch, and the surface requirements at the latching part are relatively high. When the mold is filled with high-pressure gas for bottle blowing, there is a risk of the mold expanding and bursting the buckle plates.

[0005] The third one is to achieve mold locking through the dead point position of the four-bar linkage mechanism for mold opening and closing. Disadvantages: 1. All the huge forces on the mold during high-pressure gas bottle blowing are borne by the four-bar linkage mechanism for mold opening and closing, with relatively high requirements for the strength of parts and the load-bearing capacity of the mechanism; 2. When the mold is locked, the linkage mechanism needs to pass through the dead point position, and the mold gap is relatively large. Summary of the Invention

[0006] The purpose of the present invention is to provide a linkage mold locking mechanism for a single-opening mold bottle blowing machine. When the mold is opened, the first driving component drives the second hook member to rotate away from the first hook member relative to the moving mold frame. For bottles with the same diameter, they can be taken out with a smaller mold opening angle; the rotation angle of the mold frame is smaller, and the dynamic characteristics are better.

[0007] To achieve the above purpose, the technical solution adopted by the present invention is:

[0008] A linkage mold locking mechanism for a single-opening blow molding machine, comprising a mold frame support, a fixed mold frame fixedly connected to the mold frame support, a movable mold frame rotatably arranged on the mold frame support around a first axis, and a first driving component arranged on the mold frame support and used for driving the movable mold frame to rotate and open / close relative to the fixed mold frame. The linkage mold locking mechanism further includes a first guiding column slidably penetrating through the fixed mold frame along its own length extension direction, a second driving component used for driving the first guiding column to slide, a first hook hanging member arranged on the first guiding column, and a second hook hanging member rotatably arranged on the movable mold frame around a second axis;

[0009] When the fixed mold frame and the movable mold frame are in the mold closing position, the second driving component is used for driving the first guiding column to slide, so that the first hook hanging member and the second hook hanging member are aligned and locked with each other, or the first hook hanging member and the second hook hanging member are staggered and unlocked from each other;

[0010] The first driving component is used for driving the second hook hanging member to rotate away from the first hook hanging member relative to the movable mold frame when opening the mold, and is also used for driving the second hook hanging member to rotate close to the first hook hanging member relative to the movable mold frame when closing the mold.

[0011] Preferably, the first axis and the second axis are parallel to each other and both extend in the vertical direction.

[0012] Preferably, the first driving component includes a first swing arm with one end rotatably arranged on the mold frame support around a third axis, and a first connecting rod with two ends respectively rotatably connected to the other end of the first swing arm and the movable mold frame;

[0013] The first driving component further includes a second connecting rod with one end fixedly connected to the first connecting rod, a third connecting rod with one end fixedly connected to the second hook hanging member, and a fourth connecting rod with two ends respectively rotatably connected to the other end of the second connecting rod and the other end of the third connecting rod.

[0014] More preferably, the rotation axis lines at both ends of the first swing arm, the rotation axis lines at both ends of the first connecting rod, the rotation axis line at one end of the second connecting rod, the rotation axis line at one end of the third connecting rod, and the rotation axis lines at both ends of the fourth connecting rod are parallel to each other.

[0015] More preferably, the linkage mold locking mechanism further includes a first rotating shaft rotatably arranged on the mold frame support around the third axis and used for connecting the first swing arm, a second swing arm arranged on the first rotating shaft, and a first rotor rotatably arranged on the second swing arm and driven to roll by a first cam, and the fourth axis is parallel to the third axis.

[0016] Preferably, both ends of the first guide post can pass through the fixed mold base respectively. The second driving assembly includes a mounting block for connecting one end of the first guide post, an elastic member that elastically expands and contracts along its own length direction and is abutted between the mounting block and the fixed mold base, and a second rotor that is rotatably arranged on the mounting block and is driven to roll by the second cam. The other end of the first guide post is provided with a first limiting member for restricting its relative sliding stroke with respect to the fixed mold base.

[0017] More preferably, the first guide post, the first axis line, and the second axis line are parallel to each other, all extend along the vertical direction, and are perpendicular to the fifth axis line.

[0018] More preferably, the elastic member is a compression spring sleeved on the first guide post.

[0019] More preferably, the second driving assembly further includes a second guide post with one end connected to the mounting block. The second guide post is movably arranged in the fixed mold base along its own length direction, and the second guide post is parallel to the first guide post.

[0020] Preferably, the first hook member and the second hook member are used to cooperate with each other through a plane, a curved surface or a wedge surface.

[0021] Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art: The linkage mold locking mechanism of the single-opening mold blowing machine of the present invention drives the second hook member to rotate away from the first hook member relative to the moving mold base during mold opening through the first driving assembly. There is basically no obstruction at the front end of the mold during mold opening. For bottles with the same diameter, a smaller mold opening angle can be used to take out the bottles, and at the same time, a driving device for separately driving the second hook member to rotate is saved; since there is basically no obstruction at the front end of the mold, the bottle taking path is easier to plan, the cam of the bottle taking manipulator is easier to design, and the dynamic characteristics of the manipulator are better; since the rotation angle of the moving mold base is smaller, the dynamic characteristics are better; the first hook member is driven to slide synchronously by the first guide post slidably arranged in the fixed mold base to realize the mutual locking or unlocking with the second hook member, and the mold closing and fitting action of the first hook member and the second hook member and the mold locking action of the first hook member and the second hook member are separated, which can not only reduce the mold locking difficulty of the second hook member and ensure firm mold locking, but also reduce the stroke design difficulty of the second hook member; the linkage mold locking mechanism reduces vibration and noise and runs stably and reliably, which is beneficial to improving the speed and efficiency of the blowing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Attached Figure 1 is a schematic structural diagram of the linkage mold locking mechanism according to a specific embodiment of the present invention Figure 1 (mold closing and mold locking);

[0023] Attached Figure 2Structural schematic of the linkage mold clamping mechanism according to a specific embodiment of the present invention Figure 2 (Mold clamping and locking);

[0024] Appendix Figure 3 Structural schematic of the linkage mold clamping mechanism according to a specific embodiment of the present invention Figure 3 (Mold clamping and unlocking);

[0025] Appendix Figure 4 Structural schematic of the linkage mold clamping mechanism according to a specific embodiment of the present invention Figure 4 (Mold opening);

[0026] Appendix Figure 5 Top view schematic of the linkage mold clamping mechanism according to a specific embodiment of the present invention Figure 1 (Mold clamping and hiding the mold base bracket);

[0027] Appendix Figure 6 Top view schematic of the linkage mold clamping mechanism according to a specific embodiment of the present invention Figure 2 (Mold opening and hiding the mold base bracket);

[0028] Appendix Figure 7 Partial front view schematic of the linkage mold clamping mechanism according to a specific embodiment of the present invention Figure 1 (Mold clamping and locking);

[0029] Appendix Figure 8 Partial front view schematic of the linkage mold clamping mechanism according to a specific embodiment of the present invention Figure 2 (Mold clamping and unlocking).

[0030] Wherein: 1. Mold base bracket; 2. Fixed mold base; 3. First axis line; 4. Moving mold base; 5. First guide post; 51. First limiting member; 6. First hook member; 7. Second axis line; 8. Second hook member; 9. Third axis line; 10. First swing arm; 11. First connecting rod; 12. Second connecting rod; 13. Third connecting rod; 14. Fourth connecting rod; 15. First rotating shaft; 16. Second swing arm; 17. First rotor; 18. Mounting block; 19. Elastic member; 20. Second rotor; 21. Second guide post. Specific embodiments

[0031] The technical solutions of the present invention will be further described below in conjunction with specific embodiments and the accompanying drawings.

[0032] See Figures 1-8 As shown, this embodiment provides a linkage mold clamping mechanism for a single mold opening blow molding machine, including a mold base bracket 1, a fixed mold base 2 fixedly connected to the mold base bracket 1, a moving mold base 4 rotatably arranged on the mold base bracket 1 around a first axis line 3, and a first driving assembly arranged on the mold base bracket 1 and used to drive the moving mold base 4 to rotate and open / close relative to the fixed mold base 2. In this embodiment, the first axis line 3 extends in the vertical direction.

[0033] See Figure 4 and 6 As shown, the moving mold base 4 is opened relative to the fixed mold base 2, which is the mold opening state; see Figures 1-3 As shown in FIGS. 5, 7-8, the moving mold base 4 is closed relative to the fixed mold base 2, which is the mold closing state.

[0034] See Figure 1 As shown, the above-mentioned first driving assembly includes a first rotating shaft 15 rotatably provided on the mold base bracket 1 around a third axis line 9, a first swing arm 10 fixedly connected to the upper end of the first rotating shaft 15 at one end, a second swing arm 16 fixedly connected to the lower end of the first rotating shaft 15 at one end, a first connecting rod 11 rotatably connected to the other end of the first swing arm 10 and the moving mold base 4 at both ends, and a first rotor 17 rotatably provided on the second swing arm 16 around a fourth axis line and driven to roll by a first cam (not shown in the figure). In this embodiment, the third axis line 9 and the fourth axis line extend along the vertical direction respectively, the first swing arm 10, the second swing arm 16 and the first connecting rod 11 extend along the horizontal direction respectively, and the rotation axis lines at both ends of the first connecting rod 11 extend along the vertical direction.

[0035] With this setting, when the first cam drives the first rotor 17 to roll on the cam curve, the first rotating shaft 15 is driven to rotate around the third axis line 9 through the second swing arm 16, so as to drive the first swing arm 10 to rotate around the third axis line 9 synchronously. Figure 5 In, when the first swing arm 10 swings clockwise, the moving mold base 4 is driven to rotate and open relative to the fixed mold base 2 through the first connecting rod 11; Figure 6 In, when the first swing arm 10 swings counterclockwise, the moving mold base 4 is driven to rotate and close relative to the fixed mold base 2 through the first connecting rod 11.

[0036] The above-mentioned linkage mold locking mechanism for a single mold opening blow molding machine further includes a first guide post 5 slidably inserted into the fixed mold base 2 along its own length extension direction, a second driving assembly for driving the first guide post 5 to slide, a first hook member 6 provided on the first guide post 5, and a second hook member 8 rotatably provided on the moving mold base 4 around a second axis line 7. In this embodiment, the first guide post 5 and the second axis line 7 extend along the vertical direction respectively.

[0037] See Figure 7 As shown, when the fixed mold base 2 and the moving mold base 4 are in the mold closing position, the first hook member 6 and the second hook member 8 are aligned with each other and hook and lock the mold; see Figure 8 As shown, when the fixed mold base 2 and the moving mold base 4 are in the mold closing position, the first hook member 6 and the second hook member 8 are staggered from each other to unlock between the fixed mold base 2 and the moving mold base 4; see Figure 4 As shown, when the fixed mold base 2 and the moving mold base 4 are in the mold opening position, the first hook member 6 and the second hook member 8 are staggered from each other and move relatively away along the mold opening direction.

[0038] When the fixed mold base 2 and the moving mold base 4 are in the mold closing position, the first guide post 5 is driven to slide in the vertical direction by the second driving component, so that the first hook member 6 and the second hook member 8 are aligned with each other and hooked to lock the mold, or the first hook member 6 and the second hook member 8 are staggered from each other and unlocked. The second driving component can realize the switching between the mold locking and unlocking of the fixed mold base 2 and the moving mold base 4.

[0039] The above-mentioned first driving component is used to drive the second hook member 8 to rotate away from the first hook member 6 relative to the moving mold base 4 during mold opening, and is also used to drive the second hook member 8 to rotate close to the first hook member 6 relative to the moving mold base 4 during mold closing. Through this setting, for bottles with the same diameter, they can be taken out with a smaller mold opening angle; the rotation angle of the mold base is smaller, and the dynamic characteristics are better. See Figure 6 As shown, after mold opening, the second hook member 8 can rotate relative to the moving mold base 4 to the outside of the middle parting plane of the mold. The middle parting plane of the mold forms the OA plane on the left side and the OB plane on the right side during the mold opening process, that is, the second hook member 8 can rotate to the right side of the OB plane.

[0040] See Figures 5-6 As shown, the first driving component further includes a second connecting rod 12 fixedly connected to one end of the first connecting rod 11, a third connecting rod 13 fixedly connected to one end of the second hook member 8, and a fourth connecting rod 14 rotatably connected to the other ends of the second connecting rod 12 and the third connecting rod 13 respectively. In this embodiment, the second connecting rod 12, the third connecting rod 13, and the fourth connecting rod 14 all extend in the horizontal direction, and the rotation axis lines at both ends of the fourth connecting rod 14 extend in the vertical direction.

[0041] See Figures 1-2 As shown, both ends of the first guide post 5 can respectively pass through the fixed mold base 2. The second driving component includes a mounting block 18 for connecting the lower end of the first guide post 5, an elastic member 19 elastically telescoping along its own length direction and abutted between the upper surface of the mounting block 18 and the lower surface of the fixed mold base 2, and a second rotor 20 rotatably arranged at the lower end of the mounting block 18 and driven to roll by a second cam (not shown in the figure). A first limiting member 51 for restricting the downward sliding stroke of the first guide post 5 relative to the fixed mold base 2 is provided at the upper end of the first guide post 5. The greater the distance that the first limiting member 51 protrudes from the fixed mold base 2, the greater the downward sliding stroke of the first guide post 5 relative to the fixed mold base 2. In this embodiment, the fifth axis line extends in the horizontal direction and is perpendicular to the first guide post 5. The elastic member 19 is a compression spring sleeved on the first guide post 5, and the elastic telescoping direction of the compression spring is the vertical direction.

[0042] With this setting, before mold opening, the second cam drives the second rotor 20 to roll on the cam curve, causing the first guide post 5 to move upward. The first hook member 6 and the second hook member 8 can be disengaged from each other, realizing the relative unlocking of the fixed mold base 2 and the moving mold base 4. At this time, the compression spring is compressed;

[0043] During mold opening, before the first hook member 6 and the second hook member 8 are completely separated, the second rotor 20 and the second cam need to maintain a pressing state;

[0044] During mold closing, continue to maintain the pressing state between the second rotor 20 and the second cam, or drive the second rotor 20 to roll on the cam curve through the second cam before the first hook member 6 and the second hook member 8 are engaged with each other, causing the first guide post 5 to move upward, so as to ensure that the first hook member 6 and the second hook member 8 are staggered from each other and can be engaged with each other without interference;

[0045] After mold closing, the second cam drives the second rotor 20 to roll on the cam curve. Under the combined action of the elastic restoring force of the second cam, the compression spring and the gravity of the first guide post 5 itself, the first guide post 5 moves downward to reset, making the first hook member 6 and the second hook member 8 aligned with each other, realizing the relative mold locking between the fixed mold base 2 and the moving mold base 4. When the mold locking is completed, the first limiting member 51 abuts against the upper surface of the fixed mold base 2 downward.

[0046] In this embodiment, the above-mentioned second driving assembly further includes a second guide post 21 whose lower end is connected to the upper surface of the mounting block 18. The second guide post 21 extends in the vertical direction. The second guide post 21 is movably disposed in the fixed mold base 2 along the extending direction of its own length. By providing the second guide post 21, it is possible to prevent the first guide post 5 from rotating around its own axis when sliding up and down.

[0047] The first hook member 6 and the second hook member 8 are used to cooperate with each other through a plane, a curved surface or a wedge surface. In this embodiment, the two cooperate with each other through a vertical plane. The wedge surface mentioned here means that the engaging surfaces of the first hook member 6 and the second hook member 8 are not perpendicular to the horizontal plane, but form an angle, and can wedge the fixed mold base 2 and the moving mold base 4 tightly with each other during the engaging process to reduce the mold closing gap.

[0048] The working process of this embodiment is specifically described below:

[0049] During mold opening, first, the second cam drives the second rotor 20 to roll, so as to drive the first guide post 5 to move upward synchronously, causing the first hook member 6 and the second hook member 8 to disengage and unlock from each other; then the first cam drives the first rotor 17 to roll, and the first swing arm 10 drives the moving mold base 4 to open relative to the fixed mold base 2 through the first connecting rod 11. At the same time, the first swing arm 10 drives the second hook member 8 to rotate away from the fixed mold base 2 relative to the moving mold base 4 through the first connecting rod 11, the second connecting rod 12, the fourth connecting rod 14, and the third connecting rod 13 connected in sequence, so as to finally realize mold opening;

[0050] During mold closing, the first cam drives the first rotor 17 to roll, and the first swing arm 10 drives the moving mold base 4 to close relative to the fixed mold base 2 through the first connecting rod 11. At the same time, the first swing arm 10 drives the second hook member 8 to rotate close to the first hook member 6 relative to the moving mold base 4 through the first connecting rod 11, the second connecting rod 12, the fourth connecting rod 14, and the third connecting rod 13 connected in sequence until the mold closing is in place; then under the combined action of the elastic restoring force of the second cam, the compression spring, and the self-gravity of the first guide post 5, the first guide post 5 moves downward to reset, causing the first hook member 6 and the second hook member 8 to align and lock with each other.

[0051] The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it. It 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 covered within the protection scope of the present invention.

Claims

1. A linkage mold locking mechanism for a single-opening blow molding machine, comprising a mold frame support, a fixed mold frame fixedly connected to the mold frame support, a movable mold frame rotatably arranged on the mold frame support around a first axis, and a first driving component arranged on the mold frame support and used for driving the movable mold frame to rotate and open and close relative to the fixed mold frame. Characterized in that: The linkage mold locking mechanism further comprises a first guide post slidably penetrating through the fixed mold frame along its own length extension direction, a second driving component for driving the first guide post to slide, a first hook member arranged on the first guide post, and a second hook member rotatably arranged on the movable mold frame around a second axis direction. When the fixed mold frame and the movable mold frame are in the mold closing position, the second driving component is used for driving the first guide post to slide, so that the first hook member and the second hook member are aligned and locked with each other, or the first hook member and the second hook member are staggered and unlocked with each other. The first driving component is used for driving the second hook member to rotate away from the first hook member relative to the movable mold frame when opening the mold, and is also used for driving the second hook member to rotate close to the first hook member relative to the movable mold frame when closing the mold. After opening the mold, the second hook member can rotate relative to the movable mold frame to the outside of the middle parting surface of the mold. The first driving component includes a first swing arm rotatably arranged at one end on the mold frame support around a third axis, and a first connecting rod rotatably connected to the other end of the first swing arm and the movable mold frame at both ends. The first driving component further includes a second connecting rod fixedly connected to one end of the first connecting rod, a third connecting rod fixedly connected to one end of the second hook member, and a fourth connecting rod rotatably connected to the other ends of the second connecting rod and the third connecting rod at both ends.

2. The linkage mold locking mechanism for a single-opening blow molding machine according to claim 1, Characterized in that: The first axis and the second axis are parallel to each other and both extend in the vertical direction.

3. The linkage mold locking mechanism for a single-opening blow molding machine according to claim 1, Characterized in that: The rotation axis lines at both ends of the first swing arm, the rotation axis lines at both ends of the first connecting rod, the rotation axis line at one end of the second connecting rod, the rotation axis line at one end of the third connecting rod, and the rotation axis lines at both ends of the fourth connecting rod are parallel to each other.

4. The linkage mold locking mechanism for a single-opening blow molding machine according to claim 1, Characterized in that: The linkage mold locking mechanism further comprises a first rotating shaft rotatably arranged on the mold frame support around the third axis and used for connecting the first swing arm, a second swing arm arranged on the first rotating shaft, and a first rotor rotatably arranged on the second swing arm and used for being driven to roll by a first cam, and the fourth axis is parallel to the third axis.

5. The linkage mold locking mechanism for a single-opening blow molding machine according to claim 1, Characterized in that: Both ends of the first guiding column can respectively pass through the fixed mold frame. The second driving assembly includes a mounting block for connecting one end of the first guiding column, an elastic member that can elastically expand and contract along its own length direction and is abutted between the mounting block and the fixed mold frame, and a second rotor that is rotatably arranged on the mounting block and is driven to roll by the second cam. The other end of the first guiding column is provided with a first limiting member for limiting its relative sliding stroke with respect to the fixed mold frame.

6. The linkage mold locking mechanism for a single-opening blow molding machine according to claim 5, characterized in that: The first guiding column, the first axis line, and the second axis line are parallel to each other, all extend along the vertical direction, and are perpendicular to the fifth axis line.

7. The linkage mold locking mechanism for a single-opening blow molding machine according to claim 5, characterized in that: The elastic member is a compression spring sleeved on the first guiding column.

8. The linkage mold locking mechanism for a single-opening blow molding machine according to claim 5, characterized in that: The second driving assembly further includes a second guiding column with one end connected to the mounting block. The second guiding column is movably arranged in the fixed mold frame along its own length extension direction, and the second guiding column is parallel to the first guiding column.

9. The linkage mold locking mechanism for a single-opening blow molding machine according to claim 1, characterized in that: The first hook and the second hook are used to cooperate with each other through a plane, a curved surface or a wedge surface.

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