A transposition and closing device for a vertical two-color printing press

Abstract

This invention discloses a position-changing and closing device for a vertical two-color injection molding machine, comprising an upper closing mechanism and a lower closing mechanism, both disposed between a turntable and a pressure frame. The upper closing mechanism includes a central rod with a rotating sleeve fitted on it, and an upper closing plate fixedly mounted on the side of the rotating sleeve. The lower closing mechanism includes a mounting sleeve fitted onto the bottom end of the rotating sleeve, and a lower closing plate disposed on the side of the mounting sleeve. The rotating sleeve descends, causing the mounting sleeve to rotate. When the injection molding machine is raised, the closing mechanism disposed between the injection molding machine frame and the turntable will rotate, respectively blocking the injection ports of the injection molding machine and the mold to prevent dust and impurities from entering, until the mold position exchange is completed. When the injection molding machine descends, the upper and lower closing plates rotate and move away by moving the rotating sleeve, without hindering the normal operation of the injection molding machine.

Description

Technical Field

[0001] This invention relates to the field of two-color injection molding, and particularly to a switching and closing device for a vertical two-color injection molding machine. Background Technology

[0002] During the injection molding process of a dual-station vertical two-color injection molding machine, the turntable with two molds needs to be rotated to exchange the molds for different color injection processes. When exchanging the molds, the injection port of the injection molding machine needs to be pulled out of the mold. At this time, both the injection port of the injection molding machine and the mold are open to the outside, which makes it easy for impurities from the surrounding area to enter and mix with the molten plastic, resulting in defects in the final product. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a transposition and closing device for a vertical two-color machine, which solves the current pain points in this field.

[0004] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0005] A switching and closing device for a vertical two-color press includes an upper closing mechanism and a lower closing mechanism, both of which are disposed between a turntable and a pressure frame. The upper closing mechanism includes a central rod, the lower end of which is rotatably mounted on the center of the turntable, and a top block fixedly mounted on the upper end of the central rod. The top block is vertically slidably mounted on the pressure frame. A rotating sleeve is fitted on the central rod, the top end of which is rotatably mounted on the center of the pressure frame and can abut against the top block, with ratchet teeth at the contact points. A torsion spring connected to the pressure frame is provided on the rotating sleeve, and an upper closing plate is fixedly mounted on the side of the rotating sleeve.

[0006] The lower closing mechanism includes a mounting sleeve, which is fitted onto the bottom end of the rotating sleeve. A lower closing plate is provided on the side of the mounting sleeve, and the lowering of the rotating sleeve allows the mounting sleeve to rotate.

[0007] To further explain, two fixed rods are fixedly installed on the turntable, and limit posts are fixedly installed on the fixed rods. A limit groove is provided on the side of the mounting sleeve, and the limit post slides in the limit groove. The sliding of the limit post in the limit groove can cause the mounting sleeve to rotate. A bottom ring is rotatably installed at the bottom of the mounting sleeve. The bottom ring is vertically slidably installed on the turntable, and a pull-back spring connected to the turntable is provided at the bottom of the bottom ring.

[0008] To further explain, a limiting block is fixedly installed at the bottom of the rotating sleeve. The limiting block is disposed in the mounting sleeve. The rotating sleeve can lift the mounting sleeve through the limiting block, and the limiting block can slide out from under the mounting sleeve.

[0009] To further explain, a borrowing slider is vertically slidably mounted on the side of the mounting sleeve, and the lower closing plate is fixedly mounted on the borrowing slider.

[0010] In summary, the advantages of this invention compared to the prior art are as follows: when the injection molding machine is lifted, the closing mechanism located between the injection molding machine frame and the turntable will rotate to cover the injection ports of the injection molding machine and the mold respectively, preventing dust and impurities from entering them, until the exchange of mold positions is completed. When the injection molding machine is lowered, the upper and lower closing plates will rotate and move away by driving the movement of the rotating sleeve, without hindering the normal operation of the injection molding machine. Attached Figure Description

[0011] The above and other objects, features, and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. Several embodiments of the invention are illustrated in the drawings by way of example and not limitation, wherein:

[0012] Figure 1 This is a schematic diagram of a transposition and closing device for a vertical two-color printing press.

[0013] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0014] Explanation of reference numerals in the attached drawings: 10. Base platform; 11. Turntable; 12. Injection mold; 13. Column; 14. Press frame; 15. Injection molding machine; 20. Center rod; 21. Top block; 22. Rotating sleeve; 23. Upper closing plate; 24. Limiting block; 30. Mounting sleeve; 31. Fixing rod; 32. Limiting post; 33. Limiting groove; 34. Bottom ring; 35. Pull-back spring; 36. Borrowing slider; 37. Lower closing plate. Implementation

[0015] The invention will be further described in detail below with reference to the accompanying drawings.

[0016] A switching and closing device for a vertical two-color injection molding machine includes an upper closing mechanism and a lower closing mechanism. Both mechanisms are positioned between a turntable 11 and a pressure frame 14. The turntable 11 is rotatably mounted on a base 10. Two injection molds 12 are mounted on the turntable 11. A column 13 is fixedly mounted on the base 10, and the pressure frame 14 is vertically and slidably mounted on the column 13. An injection molding machine 15 is mounted on the pressure frame 14 and can descend to connect with the injection molds 12 for injection molding. The upper closing mechanism includes a central rod 20, the lower end of which is rotatably mounted at the center of the turntable 11. A top block 21 is fixedly installed on the upper end of the central rod 20. The top block 21 is vertically slidably installed on the pressure frame 14. A rotating sleeve 22 is fitted on the central rod 20. The top end of the rotating sleeve 22 is rotatably installed at the center of the pressure frame 14. A torsion spring connected to the pressure frame 14 is provided on the rotating sleeve 22, and it can abut against the top block 21 with ratchet teeth at the contact points. When the pressure frame 14 is raised, the rotating sleeve 22 abuts against the top block 21, which can cause the rotating sleeve 22 to rotate. An upper closing plate 23 is fixedly installed on the rotating sleeve 22. The rotation of the rotating sleeve 22 can drive the upper closing plate 23 to rotate and block the injection port of the injection molding machine 15.

[0017] The lower closing mechanism includes a mounting sleeve 30, which is fitted onto the bottom end of the rotating sleeve 22. A limiting block 24 is fixedly installed at the bottom of the rotating sleeve 22, and the limiting block 24 is disposed within the mounting sleeve 30. The rotating sleeve 22 can lift the mounting sleeve 30 through the limiting block 24, and the limiting block 24 can slide out from below the mounting sleeve 30. Two fixing rods 31 are fixedly installed on the turntable 11, and the fixing rods 31 are disposed on both sides of the mounting sleeve 30. Limiting posts 32 are fixedly installed on the fixing rods 31. The mounting sleeve 30 has a limiting groove 33 on its side, and the limiting post 32 slides in the limiting groove 33. When the mounting sleeve 30 descends, it rotates 90 degrees under the action of the limiting post 32 and the limiting groove 33. A bottom ring 34 is rotatably mounted on the bottom of the mounting sleeve 30. The bottom ring 34 is vertically slidably mounted between the fixing rods 31. A return spring 35 connected to the turntable 11 is provided at the bottom of the bottom ring 34. A borrowing slider 36 is vertically slidably mounted on the side of the mounting sleeve 30. A lower closing plate 37 is fixedly mounted on the borrowing slider 36.

[0018] When the pressure frame 14 is raised, the mounting sleeve 30 is lifted by the rotating sleeve 22. The mounting sleeve 30 rises and rotates, so that the lower closing plate 37 covers the injection port of the injection mold 12. At this time, the return spring 35 is stretched. Then the turntable 11 rotates to exchange the positions of the injection mold 12. At the same time, since the mounting sleeve 30 is restricted by the limiting block 24 and cannot slide down, the fixing rod 31 can drive the mounting sleeve 30 to rotate together until the turntable 11 rotates 180 degrees.

[0019] Then, the pressure frame 14 presses down, the rotating sleeve 22 separates from the top block 21, and the rotating sleeve 22 rotates under the action of the torsion spring, causing the upper closing plate 23 to leave the injection port of the injection molding machine 15. At the same time, the limiting block 24 descends, allowing the mounting sleeve 30 to descend under the action of the pull-back spring 35. Thus, through the cooperation of the limiting post 32 and the limiting groove 33, the mounting sleeve 30 rotates, causing the lower closing plate 37 to separate from the injection mold 12, thereby allowing the injection molding machine 15 to be inserted into the injection mold 12.

[0020] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the scope of protection of the present invention, which is determined by the appended claims.

Claims

1. A transposition and closing device for a vertical two-color printing press, characterized in that: The device includes an upper closing mechanism and a lower closing mechanism, both of which are located between a turntable (11) and a pressure frame (14). The upper closing mechanism includes a central rod (20), the lower end of which is rotatably mounted on the center of the turntable (11), and a top block (21) is fixedly mounted on the upper end of the central rod (20). The top block (21) is vertically slidably mounted on the pressure frame (14). A rotating sleeve (22) is fitted on the central rod (20), and the top end of the rotating sleeve (22) is rotatably mounted on the center of the pressure frame (14) and can abut against the top block (21), with ratchet teeth at the contact points. A torsion spring connected to the pressure frame (14) is provided on the rotating sleeve (22), and an upper closing plate (23) is fixedly mounted on the side of the rotating sleeve (22). The lower closing mechanism includes a mounting sleeve (30), which is fitted onto the bottom end of the rotating sleeve (22). A lower closing plate (37) is provided on the side of the mounting sleeve (30). The lowering of the rotating sleeve (22) can cause the mounting sleeve (30) to rotate. Two fixed rods (31) are fixedly installed on the turntable (11). Limiting stakes (32) are fixedly installed on the fixed rods (31). A limiting groove (33) is provided on the side of the mounting sleeve (30). The limiting stake (32) slides in the limiting groove (33). The sliding of the limiting stake (32) in the limiting groove (33) can make the mounting sleeve (30) rotate. A bottom ring (34) is rotatably installed at the bottom of the mounting sleeve (30). The bottom ring (34) is vertically slidably installed on the turntable (11). A pull-back spring (35) connected to the turntable (11) is provided at the bottom of the bottom ring (34). A limiting block (24) is fixedly installed at the bottom of the rotating sleeve (22). The limiting block (24) is disposed in the mounting sleeve (30). The rotating sleeve (22) can lift the mounting sleeve (30) through the limiting block (24).

2. The transposition and closing device for a vertical two-color printing press according to claim 1, characterized in that: The mounting sleeve (30) has a vertically sliding borrowing slider (36) mounted on its side, and the lower closing plate (37) is fixedly mounted on the borrowing slider (36).

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