Mould locking mechanism of injection-blow hollow forming machine

Abstract

The utility model discloses a mold locking mechanism of an injection blow hollow forming machine, which comprises a mold locking frame body, fixed guide pillars are arranged on two sides of the mold locking frame body, a movable mold seat is arranged in the middle of the fixed guide pillars, a movable mold is arranged below the movable mold seat, a fixed mold seat is arranged at the lower ends of the fixed guide pillars, and a movable mold is arranged below the movable mold seat. A fixed mold is arranged above the fixed mold base, a lower limiting plate is arranged above the movable mold base, fixing columns are arranged on the two sides of the upper portion of the lower limiting plate, buffering rubber pads are arranged at the top ends of the fixing columns, a lower fixing lug is arranged in the middle of the top face of the movable mold base, and a lower supporting rod is arranged in the lower fixing lug. And the upper end of the lower supporting rod is connected with the upper supporting rod. According to the utility model, the upper limiting plate and the lower limiting plate are respectively arranged at the upper position and the lower position in the mold locking frame body, so that the up-and-down movement direction of the mold locking mechanism can be limited and positioned, the structures are matched more harmoniously, and the mold locking position is tighter.

Description

Technical Field

[0001] This utility model relates to the field of injection blow molding machines, specifically a mold locking mechanism for injection blow molding machines. Background Technology

[0002] Injection blow molding machines process tubular thermoplastic preforms, which are still in a softened state after being extruded from an extruder, into a molding die. Compressed air is then introduced, and the pressure of the air causes the preform to deform along the die cavity, thereby blowing it into a hollow product with a short neck. Injection blow molding is the third most commonly used plastic processing method and also one of the fastest-growing plastic molding methods. Compared with injection molding, it has a lower equipment cost, stronger adaptability, better moldability, and can mold products with complex undulating curves.

[0003] The existing mold-locking mechanism of injection blow molding machine still has certain drawbacks in use. The traditional mold-locking mechanism is relatively complex. Under long-term operation, the mechanism will generate a certain vibration, which will cause the connection position inside the mold-locking mechanism to loosen. This not only affects the firmness of the locking, but also affects the stability of the operation of the mold-locking mechanism. Summary of the Invention

[0004] The purpose of this utility model is to provide a mold-locking mechanism for an injection blow molding machine, so as to solve the problems mentioned in the background art, that the traditional mold-locking mechanism has a relatively complex mold-locking method, and that the mechanism will generate a certain vibration under long-term operation, which will cause the connection position inside the mold-locking mechanism to loosen, affecting not only the locking firmness, but also the stability of the mold-locking mechanism operation.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a mold-locking mechanism for an injection blow molding machine, comprising a mold-locking frame, fixed guide pillars on both sides of the mold-locking frame, a movable mold base in the middle of the fixed guide pillars, a movable mold below the movable mold base, a fixed mold base at the lower end of the fixed guide pillars, a fixed mold above the fixed mold base, a lower limit plate above the movable mold base, fixed pillars on both sides above the lower limit plate, a buffer pad at the top of the fixed pillars, a lower fixing ear in the middle of the top surface of the movable mold base, a lower support rod inside the lower fixing ear, the upper end of the lower support rod connected to an upper support rod, the upper end of the upper support rod connected to the upper fixing ear, the upper fixing ear located on the bottom surface of the mold-locking frame, a balancing push block in the middle of the lower part of the interior of the mold-locking frame, locking connecting rods on both sides of the balancing push block, an upper limit plate above the balancing push block, and a cylinder in the middle of the top of the mold-locking frame.

[0006] In a further embodiment, the upper support rod and the lower support rod are rotatably connected to the locking link via pins, and the upper support rod and the lower support rod are of the same length.

[0007] In a further embodiment, the upper end of the locking link is rotatably connected to the balance push block via a pin.

[0008] In a further embodiment, the two sides of the top surface of the upper limit plate are connected to the mold clamping frame body by positioning rods, the bottom end of the positioning rods is fixedly connected to the upper limit plate by threads, and the positioning rods are slidably connected to the mold clamping frame body.

[0009] In a further embodiment, the lower limit plate is connected to the fixed guide post via a hanger, and both ends of the hanger are connected to the fixed guide post via mounting sleeves, and the mounting sleeves are fixedly connected to the fixed guide post via fixing screws.

[0010] In a further embodiment, the buffer pad is connected to the fixing post by a spring, and there are a total of four fixing posts.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] In this utility model, an upper limit plate and a lower limit plate are respectively provided at the upper and lower positions inside the mold locking frame. This structure can limit and position the vertical movement of the mold locking mechanism, making the cooperation between structures more coordinated and the position of the mold locking more secure. Buffer pads are provided on both sides above the lower limit plate. The buffer pads can buffer the locking linkage, preventing damage to the locking linkage due to excessive force, reducing vibration, thereby extending the service life of the mechanism and improving the stability of the mold locking. The structural principle is simple and easier to operate. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the mold-locking mechanism of an injection blow molding machine according to the present invention;

[0014] Figure 2 This is a schematic diagram of the structure of the hanger of this utility model;

[0015] Figure 3 This is a schematic diagram of the locking structure of the moving mold of this utility model;

[0016] Figure 4 This is a side view of the mold-locking mechanism of an injection blow molding machine according to the present invention;

[0017] Figure 5 This is a top view of the lower limit plate of this utility model.

[0018] In the diagram: 1. Mold locking frame; 2. Fixed guide post; 3. Upper support rod; 4. Lower support rod; 5. Locking linkage; 6. Upper limit plate; 7. Balance push block; 8. Positioning rod; 9. Cylinder; 10. Upper fixing ear; 11. Lower fixing ear; 12. Hanger; 13. Mounting sleeve; 14. Moving mold base; 15. Moving mold; 16. Fixed mold base; 17. Fixed mold; 18. Fixing screw; 19. Buffer pad; 20. Spring; 21. Fixed post; 22. Lower limit plate. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Please see Figure 1-5 This utility model provides an embodiment of a mold-locking mechanism for an injection blow molding machine, comprising a mold-locking frame 1, fixed guide pillars 2 on both sides of the mold-locking frame 1, a movable mold base 14 in the middle of the fixed guide pillars 2, a movable mold 15 below the movable mold base 14, a fixed mold base 16 at the lower end of the fixed guide pillars 2, a fixed mold 17 above the fixed mold base 16, a lower limit plate 22 above the movable mold base 14, fixed pillars 21 on both sides above the lower limit plate 22, a buffer pad 19 at the top of the fixed pillars 21, a lower fixing ear 11 in the middle of the top surface of the movable mold base 14, a lower support rod 4 inside the lower fixing ear 11, the upper end of the lower support rod 4 connected to the upper support rod 3, the upper end of the upper support rod 3 connected to the upper fixing ear 10, and the upper fixing ear 10 located on the bottom surface of the mold-locking frame 1, in the middle of the lower part of the interior of the mold-locking frame 1. A balance push block 7 is provided at the position, and locking connecting rods 5 are provided on both sides of the balance push block 7. An upper limit plate 6 is provided above the balance push block 7, and a cylinder 9 is provided at the middle position of the top of the mold clamping frame 1. The fixed guide post 2 is used to guide and position the moving mold base 14 to move up and down. The fixed mold base 16 is used to install and fix the fixed mold 17. The lower limit plate 22 is used to limit and position the moving mold base 14 to move up. The fixed post 21 is used to install and fix the buffer pad 19. The buffer pad 19 is used to buffer the locking connecting rod 5. The cooperation between the lower support rod 4, the upper support rod 3 and the locking connecting rod 5 is used to lock the closing position of the moving mold 15. The balance push block 7 is used to adjust the balanced movement of the locking connecting rod 5. The upper limit plate 6 is used to limit and position the retracted position of the locking connecting rod 5.

[0021] The upper support rod 3 and the lower support rod 4 are rotatably connected to the locking link 5 via pins. The upper support rod 3 and the lower support rod 4 are of the same length. The rotatable connection allows the upper support rod 3 and the lower support rod 4 to move in coordination with the locking link 5. The upper end of the locking link 5 is rotatably connected to the balance push block 7 via a pin. The rotatable connection allows the upper end of the locking link 5 to operate in coordination with the balance push block 7. The two sides of the top surface of the upper limit plate 6 are connected to the mold clamping frame 1 via positioning rods 8. The bottom end of the positioning rod 8 is fixedly connected to the upper limit plate 6 via a thread, and the positioning rod 8 is slidably connected to the mold clamping frame 1. The positioning rod 8 is used to guide and position the upper limit plate 6 to move up and down.

[0022] The lower limit plate 22 is connected to the fixed guide post 2 via a hanger 12. Both ends of the hanger 12 are connected to the fixed guide post 2 via mounting sleeves 13, and the mounting sleeves 13 are fixedly connected to the fixed guide post 2 via fixing screws 18. The hanger 12 is used to suspend and install the lower limit plate 22.

[0023] The buffer pad 19 is connected to the fixing post 21 by a spring 20, and there are a total of four fixing posts 21. The spring 20 can make the buffer pad 19 have a certain degree of elasticity, so that it has a good buffering effect.

[0024] Working principle: During use, the blank is placed between the fixed mold 17 and the moving mold 15. The cylinder 9 drives the upper limit plate 6 to move downward, pushing the balance push block 7 downward. The locking rod 5 pushes the upper support rod 3 and the lower support rod 4 to both sides, so that the upper support rod 3 and the lower support rod 4 are connected in a straight line, thereby adjusting the moving mold base 14 downward, so that the fixed mold 17 and the moving mold 15 are closed. At the same time, the buffer rubber pad 19 buffers the force of the movement of the locking rod 5, so that the locking rod 5 is smoothly adjusted to the mold locking position. Then, compressed air is introduced into the blank to make it air-pressurized.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A mold-locking mechanism for an injection blow molding machine, comprising a mold-locking frame (1), characterized in that: The mold-locking frame (1) has fixed guide pillars (2) on both sides. A movable mold base (14) is provided in the middle of the fixed guide pillar (2). A movable mold (15) is provided below the movable mold base (14). A fixed mold base (16) is provided at the lower end of the fixed guide pillar (2). A fixed mold (17) is provided above the fixed mold base (16). A lower limit plate (22) is provided above the movable mold base (14). Fixed pillars (21) are provided on both sides above the lower limit plate (22). A buffer pad (19) is provided at the top of the fixed pillar (21). The middle part of the top surface of the movable mold base (14) is... A lower fixing ear (11) is provided, and a lower support rod (4) is provided inside the lower fixing ear (11). The upper end of the lower support rod (4) is connected to the upper support rod (3), and the upper end of the upper support rod (3) is connected to the upper fixing ear (10). The upper fixing ear (10) is located on the bottom surface of the mold locking frame (1). A balance pushing block (7) is provided at the middle position of the lower part of the mold locking frame (1). Locking connecting rods (5) are provided on both sides of the balance pushing block (7). An upper limit plate (6) is provided above the balance pushing block (7). A cylinder (9) is provided at the middle position of the top of the mold locking frame (1).

2. The mold-locking mechanism of the injection blow molding machine according to claim 1, characterized in that: The upper support rod (3) and the lower support rod (4) are rotatably connected to the locking link (5) by a pin, and the upper support rod (3) and the lower support rod (4) have the same length.

3. The mold-locking mechanism of the injection blow molding machine according to claim 1, characterized in that: The upper end of the locking link (5) is rotatably connected to the balance push block (7) via a pin.

4. The mold-locking mechanism of an injection blow molding machine according to claim 1, characterized in that: The upper limit plate (6) is connected to the mold clamping frame (1) on both sides of its top surface by positioning rods (8). The bottom end of the positioning rods (8) is fixedly connected to the upper limit plate (6) by threads, and the positioning rods (8) are slidably connected to the mold clamping frame (1).

5. The mold-locking mechanism of an injection blow molding machine according to claim 1, characterized in that: The lower limit plate (22) is connected to the fixed guide post (2) through a hanger (12). The two ends of the hanger (12) are connected to the fixed guide post (2) through an installation sleeve (13), and the installation sleeve (13) is fixedly connected to the fixed guide post (2) through a fixing screw (18).

6. The mold-locking mechanism of an injection blow molding machine according to claim 1, characterized in that: The buffer pad (19) is connected to the fixing post (21) by a spring (20), and there are a total of four fixing posts (21).

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