Mold locking mechanism of bottle blowing machine

Abstract

The invention discloses a mold locking mechanism of a bottle blowing machine, which belongs to the field of plastic bottle production equipment, and comprises a mold frame support, a positioning rod is arranged on the mold frame support, a left mold frame and a right mold frame are movably arranged on the positioning rod, a swing arm shaft is arranged on the mold frame support, a mold locking swing arm is movably arranged on the swing arm shaft, and a mold locking mechanism is arranged on the mold locking swing arm. The mold locking swing arm is connected with the left mold frame and the right mold frame through a middle connecting rod mechanism; a left mold locking long shaft and a left mold locking short shaft are arranged at the front end of the left mold frame, and the left mold locking long shaft is arranged at the front end of the left mold frame in a penetrating manner; a plurality of groups of fixing hooks are mounted at the front end of the left mold locking long shaft; a right mold locking long shaft and a right mold locking short shaft are arranged on the right mold frame, the right mold locking long shaft penetrates through the front end of the right mold frame, and a plurality of sets of movable hooks are installed at the front end of the right mold locking long shaft. The requirement for form and location tolerance is lowered, and production and manufacturing are easier; the structure is simpler, installation and maintenance are convenient, and interchangeability is good; long-time stable operation is facilitated; and the working effect and efficiency are improved, noise is reduced during mold locking, and the surrounding working environment is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of plastic bottle production equipment, in particular to a mold locking mechanism for a bottle blowing machine. Background Art

[0002] When plastic bottles are processed in batches, the plastic preforms are usually heated to a certain temperature and then transferred to the mold for pressurized blowing. With the increase in the production speed of the bottle blowing machine, the mold frame with the mold installed as the core component of the blowing process needs to have high stability. The opening and closing actions are the key actions that the mold frame mechanism needs to perform. The conventional mold frame locking mechanism usually realizes the unlocking and locking between the left and right mold frames by the lifting rod on the right mold frame driving the connecting rod and then driving the locking pin to move up and down, and the locking pin cooperates with the pin hole of the left mold frame.

[0003] The existing clamping mechanism has the following defects: multi-point connection is adopted from control to clamping pin, and the transmission accuracy is unreliable; multiple clamping pins and multiple clamping sleeves need to cooperate at the same time, which places high requirements on the processing and installation accuracy of shape and position; when moving at high speed, tiny frame vibration brings difficulties to clamping, and generates a lot of noise during clamping, affecting production. Summary of the invention

[0004] With regard to the above problems existing in the prior art, the object of the present invention is to provide a clamping mechanism for a bottle blowing machine to solve the above problems raised in the background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A mold locking mechanism for a bottle blowing machine comprises a mold frame support, wherein a positioning rod is provided on the mold frame support, a left mold frame and a right mold frame are movably provided on the positioning rod, a swing arm shaft is provided on the mold frame support, a mold locking swing arm is movably provided on the swing arm shaft, and the mold locking swing arm is connected with the left mold frame and the right mold frame through an intermediate connecting rod mechanism; a left mold locking long axis and a left mold locking short axis are provided at the front end of the left mold frame, and the left mold locking long axis passes through and is arranged at the front end of the left mold frame; a plurality of fixed hooks are installed at the front end of the left mold locking long axis; a right mold locking long axis and a right mold locking short axis are provided on the right mold frame, and the right mold locking long axis passes through and is arranged at the front end of the right mold frame, and a plurality of movable hooks are installed at the front end of the right mold locking long axis.

[0007] As a further solution of the present invention: the fixed hooks and the movable hooks are arranged in one-to-one correspondence.

[0008] As a further solution of the present invention: the bottom of the left mold locking major axis and the bottom of the left mold locking minor axis are connected to the left spring seat, and a bottom compression spring is installed between the left mold locking major axis and the left spring seat.

[0009] As a further solution of the present invention: the top of the left mold locking short axis is movably connected to the middle position of the left mold locking long axis.

[0010] As a further solution of the present invention: the top end of the left clamping long axis is connected to the limiting pressure cover.

[0011] As a further solution of the present invention: the bottom of the right mold locking major axis and the bottom of the right mold locking minor axis are connected to the right spring seat.

[0012] As a further solution of the present invention: the top of the right clamping short axis is connected to the middle position of the right clamping long axis.

[0013] As a further solution of the present invention: the top end of the right mold locking long axis is connected to another group of limiting pressure covers, and a top compression spring is provided between the right mold locking long axis and the limiting pressure cover.

[0014] As a further solution of the present invention: a roller is installed at the front end of the right spring seat.

[0015] As a further solution of the present invention: a shaft locking device is also installed on the right mold frame to control the position of the long axis of the right mold locking.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The mounting holes of the left and right mold frames of the present invention are more independent, which reduces the requirements for shape and position tolerances and is easier to produce; the structure is simpler, easy to install and maintain, and has good interchangeability; it can automatically compensate for the gap caused by installation errors or long-term wear, which is beneficial to long-term stable operation; it will not be difficult to lock the mold and cause mold locking noise due to the slight vibration of the high-speed running frame, which improves the effect and efficiency during work, reduces noise during mold locking, and is beneficial to ensuring the surrounding working environment. The present invention adopts the left mold frame and the right mold frame to ensure the reliability of transmission accuracy. At the same time, the working method of the left mold frame and the right mold frame has lower requirements for the processing and installation accuracy of the shape and position, which is convenient for the mold locking of the bottle blowing machine and increases safety. When moving at high speed, the vibration of the frame will not cause difficulties in mold locking, which improves the effect and efficiency during work, reduces noise during mold locking, and is beneficial to ensuring the surrounding working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a schematic structural diagram of a clamping mechanism for a bottle blowing machine disclosed in an embodiment.

[0019] Figure 2 The present invention is a schematic diagram of the open state of a left mold frame and a right mold frame in a mold clamping mechanism of a bottle blowing machine disclosed in an embodiment.

[0020] Figure 3 The present invention is a schematic diagram of the closed state of a left mold frame and a right mold frame in a mold clamping mechanism of a bottle blowing machine disclosed in an embodiment.

[0021] Figure 4The present invention is a side view of a right mold frame in a mold clamping mechanism of a bottle blowing machine disclosed in an embodiment.

[0022] The reference numerals in the figure are: 1. mold frame support; 2. positioning rod; 3. left mold frame; 4. right mold frame; 5. swing arm shaft; 6. locking mold swing arm; 7. intermediate connecting rod mechanism; 10. left locking mold long axis; 11. left locking mold short axis; 12. left spring seat; 13. bottom compression spring; 14. fixing hook; 15. right locking mold long axis; 16. right locking mold short axis; 17. right spring seat; 18. roller; 19. movable hook; 20. top compression spring; 21. limiting pressure cover; 22. locking shaft device. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", and "connected" should be understood in a broad sense; for example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, or an electrical connection, a direct connection, or an indirect connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The present invention designs a more reliable mold locking device in view of the problems of the existing mold frames. The installation holes of the left and right mold frames are more independent, which reduces the requirements for form and position tolerances and is easier to produce; the structure is simpler, installation and maintenance are convenient, and interchangeability is good; the gap caused by installation error or long-term wear can be automatically compensated, which is beneficial to long-term stable operation; and the mold locking difficulty and mold locking noise caused by the slight vibration of the high-speed running frame will not occur.

[0026] See also Figure 1-4A mold clamping mechanism for a bottle blowing machine includes a mold frame support 1, a positioning rod 2 is provided on the mold frame support 1, a left mold frame 3 and a right mold frame 4 are movably provided on the positioning rod 2, a swing arm shaft 5 is provided on the mold frame support 1, a locking swing arm 6 is movably provided on the swing arm shaft 5, and the locking swing arm 6 is connected to the left mold frame 3 and the right mold frame 4 through an intermediate connecting rod mechanism 7; when the left and right mold frames are not locked, the swing arm 6 can be rotated to drive the swing arm shaft 5 to rotate, and the linkage connecting rod mechanism 7 can drive the left and right mold frames to rotate respectively, so as to realize the opening and closing of the left and right mold frames. When working, after the mold frame is opened and the preform is placed, it needs to be closed and locked again to complete the blowing and pressurizing process. At this time, the swing arm 6 is rotated to make the front ends of the left and right mold frames approach each other until they are closed. The left mold frame 3 will hit the front end of the locking shaft device 22, causing it to lose its ability to lock the shaft. The top spring 20 releases its elastic potential energy, driving the right locking mold long axis 15 to rise, causing the fixed hook 14 and the movable hook 19 to contact each other. Under the action of the bottom spring 13, the contact surfaces of the two hooks can always be in contact with force, which can also compensate for the situation where the mechanism has a certain amount of wear after being used for a period of time.

[0027] A left mold locking major axis 10 and a left mold locking minor axis 11 are provided at the front end of the left mold frame 3, and the left mold locking major axis 10 passes through the front end of the left mold frame 3; the bottom of the left mold locking major axis 10 and the bottom of the left mold locking minor axis 11 are connected to the left spring seat 12, and the top of the left mold locking minor axis 11 is movably connected to the middle position of the left mold locking major axis 10, which limits the freedom of the left mold locking major axis 10 and the left mold locking minor axis 11 to rotate around their own axes, but retains the freedom of the left mold locking major axis 10 in the vertical direction in the matching hole at the front end of the left mold frame 3. A bottom compression spring 13 is installed between the left mold locking major axis 10 and the left spring seat 12, and the top end of the left mold locking major axis 10 is connected to the limiting pressure cover 21. Under the action of the bottom compression spring 13 and the limitation of the limiting pressure cover 21 at the top end of the left mold locking major axis 10, the left mold locking major axis 10 is fixed relative to the left mold frame 3, and a plurality of sets of fixing hooks 14 are installed at the front end of the left mold locking major axis 10.

[0028] Similar to the left mold frame 3, the right mold frame 4 is provided with a right mold locking long axis 15 and a right mold locking short axis 16. The right mold locking long axis 15 is set through the front end of the right mold frame 4. The bottom of the right mold locking long axis 15 and the bottom of the right mold locking short axis 16 are connected to the right spring seat 17. The top of the right mold locking short axis 16 is connected to the middle position of the right mold locking long axis 15. The right mold locking long axis 10 can also only move up and down linearly in the front end matching hole of the right mold frame 4. The top of the right mold locking long axis 15 is connected to another group of limit pressure covers 21. A top compression spring 20 is provided between the right mold locking long axis 15 and the limit pressure cover 21; a roller 18 is installed at the front end of the right spring seat 17. Under the restriction of the limit pressure cover 21 at the top of the right mold locking long axis 15, the right mold locking long axis 15 is fixed relative to the right mold frame 4. The top compression spring 20 and the right spring seat 17 also play an upper and lower limit role for the right mold locking long axis 15. A plurality of movable hooks 19 are installed at the front end of the right clamping shaft 15 .

[0029] The left mold frame 3 and the right mold frame 4 are arranged in mirror symmetry. When working, the left mold frame 3 and the right mold frame 4 cooperate with each other to conveniently clamp the bottle, which is conducive to locking the bottle, facilitating subsequent processing of the bottle, increasing safety, and facilitating the use of the device.

[0030] The left mold frame 3 and the right mold frame 4 are generally arranged in a circle. The semicircular left mold frame 3 and the right mold frame 4 are convenient for clamping bottles of different sizes, facilitating subsequent work, increasing safety, and facilitating the use of the device.

[0031] The right mold frame 4 is also equipped with a locking shaft device 22 to control the position of the right mold locking shaft 10. When the roller 18 is pressed down to compress the compression spring 20 and the right mold locking shaft 15 drops to the limit position, the locking shaft device 22 will lock the position of the right mold locking shaft 15 so that the spring 20 cannot restore its original length. However, when the front ends of the left mold frame 3 and the right mold frame 4 are about to contact and close, the left mold frame 3 will hit the front end of the locking shaft device 22, making it lose its locking ability. In this way, the spring 20 can exert its elastic characteristics and drive the right mold locking shaft 15 to rise to the upper limit position.

[0032] During operation, the bottom compression spring 13 is extended to drive the left mold frame 3 to move upward, and the top compression spring 20 is extended to drive the right mold frame 4 to move downward, so that the left mold frame 3 and the right mold frame 4 are staggered up and down, which is convenient for opening the fixed hook 14 and the movable hook 19, and the left mold frame 3 and the right mold frame 4 are opened at the back, which is convenient for inserting the bottle into the left mold frame 3 and the right mold frame 4, and then the left mold frame 3 and the right mold frame 4 are controlled to shrink through the locking swing arm 6 through the middle connecting rod mechanism 7. At the same time, the bottom compression spring 13 shrinks to drive the left mold frame 3 to move downward, and the top compression spring 20 shrinks to drive the right mold frame 4 to move upward, the fixed hook 14 and the movable hook 19 cooperate to lock, and the bottom clamps the bottle tightly to lock the mold, which is beneficial to the operation of the device, increases safety, and facilitates the use of the device.

[0033] The fixed hooks 14 and the movable hooks 19 are arranged in a one-to-one correspondence to ensure the stability of the connection, increase safety, and facilitate the use of the device. The opening of the fixed hook 14 is arranged downward, and the opening of the movable hook 19 is arranged upward. During operation, the bottom compression spring 13 drives multiple groups of fixed hooks 14 to move upward, and the top compression spring 20 drives the movable hook 19 to move downward, which is convenient for separating the fixed hooks 14 and the movable hooks 19, and is conducive to loosening the left mold frame 3 and the right mold frame 4, facilitating the work, increasing safety, and facilitating the use of the device.

[0034] The initial working state is as follows Figure 2As shown, the right mold locking long axis 15 reaches the upper limit position, and the fixed hook 14 and the movable hook 19 fit each other. Since the left mold frame 3 and the right mold frame 4 can only rotate around the same positioning rod 2, only horizontal force can be provided to open the left and right mold frames. However, no matter how much force is provided, the horizontal direction of the force line is always within the friction angle of the designed hook. Due to the friction self-locking phenomenon, the fixed hook 14 and the movable hook 19 cannot be disengaged without being damaged, maintaining the locking state of the left and right mold frames.

[0035] When the mold frame needs to be opened, the roller 18 is simply pressed down. At this time, the top compression spring 20 is compressed, so that the right mold locking shaft 15 drives the movable hook 19 to descend and stagger with the engaged fixed hook 14. The right mold locking shaft 15 descends to the limit position, and the locking shaft device 22 locks the position of the right mold locking shaft 15 to achieve Figure 3 At this time, the left and right mold frames can be freely opened under the drive of the swing arm 6.

[0036] After the mold frame is opened and the preform is placed, it needs to be closed and locked again to complete the blowing and pressurizing process. At this time, the swing arm 6 is rotated to make the front ends of the left and right mold frames close to each other until they are closed. The left mold frame 3 will hit the front end of the locking shaft device 22, making it lose its ability to lock the shaft. The spring 20 releases its elastic potential energy, driving the right mold locking long axis 15 to rise, so that the fixed hook 14 and the movable hook 19 contact each other. Under the action of the spring 13, the contact surfaces of the two hooks can always be in contact with force, which can also compensate for the situation where the mechanism has a certain amount of wear after being used for a period of time.

[0037] In this embodiment, two groups of hooks are used in the form of contacting each other with contact surfaces, but they can also be in the form of planes, curved surfaces or other forms that can produce friction self-locking. During operation, the bottom compression spring 13 drives the multiple groups of fixed hooks 14 to move upward, and the top compression spring 20 drives the movable hook 19 to move downward, so that the fixed hook 14 and the movable hook 19 can be separated, which is conducive to loosening the left mold frame 3 and the right mold frame 4, facilitating the work, increasing safety, and facilitating the use of the device.

[0038] In this embodiment, a combination of a short and a long axis is used to move linearly up and down in the mold frame, but a linear motion structure can also be used, which is beneficial for long-term stable operation; it will not cause difficulty in clamping the mold and mold clamping noise due to slight vibration of the high-speed running frame.

[0039] In this embodiment, a single elastic member such as a spring is used to provide the contact surface pressure, but it is also possible to provide an elastic member or other forms of force independently for each hook.

[0040] The present invention designs a more reliable mold locking device in view of the problems of the existing mold frames. The installation holes of the left and right mold frames are more independent, which reduces the requirements for form and position tolerances and is easier to produce; the structure is simpler, installation and maintenance are convenient, and interchangeability is good; the gap caused by installation error or long-term wear can be automatically compensated, which is beneficial to long-term stable operation; and the mold locking difficulty and mold locking noise caused by the slight vibration of the high-speed running frame will not occur.

[0041] The present invention adopts the left mold frame and the right mold frame to ensure the reliability of transmission accuracy. At the same time, the working mode of the left mold frame and the right mold frame has low requirements on the processing and installation accuracy of the shape and position, which is convenient for the clamping of the bottle blowing machine and increases safety. When moving at high speed, the vibration of the frame will not cause difficulties in clamping the mold, thereby improving the effect and efficiency of the work, reducing noise when clamping the mold, and ensuring the surrounding working environment.

[0042] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive from any point of view. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention, and any reference numerals in the claims should not be considered as limiting the claims involved.

[0043] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A clamping mechanism for a bottle blowing machine, characterized in that: The mold frame comprises a mold frame support (1), wherein a positioning rod (2) is provided on the mold frame support (1), a left mold frame (3) and a right mold frame (4) are movably provided on the positioning rod (2), a swing arm shaft (5) is provided on the mold frame support (1), a locking mold swing arm (6) is movably provided on the swing arm shaft (5), and the locking mold swing arm (6) is connected to the left mold frame (3) and the right mold frame (4) through an intermediate connecting rod mechanism (7); a left locking mold long axis (10) and a left locking mold short axis (11) are provided at the front end of the left mold frame (3), and the left locking mold long axis (10) is arranged through the front end of the left mold frame (3); a plurality of fixed hooks (14) are installed at the front end of the left locking mold long axis (10); a right locking mold long axis (15) and a right locking mold short axis (16) are provided on the right mold frame (4), and the right locking mold long axis (15) is arranged through the front end of the right mold frame (4), and a plurality of movable hooks (19) are installed at the front end of the right locking mold long axis (15).

2. A mold clamping mechanism for a bottle blowing machine according to claim 1, characterized in that: The fixed hooks (14) and the movable hooks (19) are arranged in a one-to-one correspondence.

3. A mold clamping mechanism for a bottle blowing machine according to claim 2, characterized in that: The bottom of the left mold locking major axis (10) and the bottom of the left mold locking minor axis (11) are connected to the left spring seat (12), and a bottom compression spring (13) is installed between the left mold locking major axis (10) and the left spring seat (12).

4. A mold clamping mechanism for a bottle blowing machine according to claim 3, characterized in that: The top of the left mold locking short axis (11) is movably connected to the middle position of the left mold locking long axis (10).

5. A mold clamping mechanism for a bottle blowing machine according to claim 4, characterized in that: The top end of the left clamping long axis (10) is connected to a limiting pressure cover (21).

6. A mold clamping mechanism for a bottle blowing machine according to claim 5, characterized in that: The bottom of the right mold locking major axis (15) and the bottom of the right mold locking minor axis (16) are connected to the right spring seat (17).

7. A mold clamping mechanism for a bottle blowing machine according to claim 6, characterized in that: The top of the right mold locking short axis (16) is connected to the middle position of the right mold locking long axis (15).

8. The clamping mechanism of a bottle blowing machine according to claim 7, characterized in that: The top end of the right mold locking long axis (15) is connected to another set of limiting pressure covers (21), and a top compression spring (20) is provided between the right mold locking long axis (15) and the limiting pressure covers (21).

9. A mold clamping mechanism for a bottle blowing machine according to claim 8, characterized in that: A roller (18) is installed at the front end of the right spring seat (17).

10. A mold clamping mechanism for a bottle blowing machine according to claim 9, characterized in that: The right mold frame (4) is also provided with a shaft locking device (22) for controlling the position of the right mold locking long axis (10).

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