High-applicability stretching mechanism for bottle blowing machine

Abstract

The utility model provides a high-applicability stretching mechanism for a bottle blowing machine, which comprises a mounting seat provided with a blowing hole in a penetrating manner, a hollow stretching rod connected to the inner side of the blowing hole in a sliding manner, and a plurality of supporting units uniformly distributed at the upper end of the hollow stretching rod along the circumferential direction, the supporting unit comprises a supporting rod hinged to the hollow stretching rod and an elastic pressing piece used for driving the supporting rod to rotate towards the outer side, the upper end of the elastic pressing piece is fixedly connected with the inner side of the supporting rod, and the upper end of the elastic pressing piece is fixedly connected with the inner side of the hollow stretching rod. And after the bottle blank at the upper end of the mounting seat is formed by blowing, the hollow stretching rod is driven by an external driving device to move downwards. When the outer wall of the supporting rod abuts against the edge of the hole opening of the air blowing hole, the supporting rod is squeezed by the installation base and gradually rotates towards the inner side. And when the hollow stretching rod moves downwards to the limiting position, the multiple supporting rods are all in a folded state, at the moment, the supporting rods can stretch into bottle blanks with small calibers, and the advantage of being high in applicability is achieved.

Description

Technical Field

[0001] The utility model relates to spare parts for a bottle blowing machine, in particular to a stretching mechanism for a bottle blowing machine with high applicability. Background Art

[0002] Currently, a Chinese patent with the announcement number CN215750690U discloses a stretching mechanism for a bottle blowing machine, comprising a mounting base for fixing a preform, a blowing hole in the middle of the mounting base, a stretching rod slidably connected to the blowing hole, and a drive assembly provided at the bottom of the stretching rod. The drive assembly includes a rack provided at the bottom of the stretching rod and a gear meshing with the rack, and a drive member connected to the gear for driving the gear to rotate forward or reverse. The stretching rod is provided with an air guide channel inside, and a plurality of air injection holes connected to the air guide channel are provided through the top side wall of the stretching rod, and an air inlet hole connected to the air guide channel is provided through the bottom side wall of the stretching rod. However, the head shape of the stretching rod is fixed, making it difficult to adapt to preforms of different calibers, resulting in poor applicability. Summary of the Invention

[0003] In view of this, an object of the present invention is to provide a stretching mechanism for a bottle blowing machine with high applicability, which has the advantage of high applicability.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a highly applicable stretching mechanism for a bottle blowing machine, comprising a mounting seat with a blowing hole provided therethrough, a hollow stretching rod slidably connected to the inner side of the blowing hole, the upper end of the hollow stretching rod having a plurality of support units evenly distributed along the circumference, the support unit comprising a support rod hinged to the hollow stretching rod, and an elastic pressing plate for driving the support rod to rotate outward, the upper end of the elastic pressing plate being fixedly connected to the inner side of the support rod, and the upper end of the elastic pressing plate being fixedly connected to the inner side of the hollow stretching rod.

[0005] With the above technical solution, after the preform above the mounting seat is blown, the hollow stretch rod is driven downward by an external drive device. When the outer wall of the support rod contacts the edge of the blow hole, the support rod is squeezed by the mounting seat and gradually rotates inward. When the hollow stretch rod reaches its lower limit, the support rods are retracted, allowing them to fit into smaller preforms, offering greater applicability. After the preform to be processed is placed above the mounting seat, the hollow stretch rod is driven upward by the external drive device. During this process, the support rod gradually rotates outward under the elastic force of the elastic pressure plate, effectively supporting the base of the preform to be processed. The upper end of the elastic pressure plate is fixedly connected to the inner side of the support rod, and the upper end of the elastic pressure plate is fixedly connected to the inner side of the hollow stretch rod. This arrangement of the elastic pressure plate minimizes the rotation of the support rod, ensuring that the support rods can be effectively retracted when the hollow stretch rod reaches its lower limit.

[0006] Preferably, a mounting protrusion is provided on the inner side of the support rod, and a plug-in groove 1 is provided at the lower end of the mounting protrusion. A fixing protrusion is provided on the inner side of the hollow stretching rod, and a plug-in groove 2 is provided at the upper end of the fixing protrusion. The two ends of the elastic pressing plate are respectively plugged and fixed in the plug-in groove 1 and the plug-in groove 2.

[0007] Through the above technical solution, the two ends of the elastic pressing piece are respectively inserted and fixed in the plug-in slot 1 and the plug-in slot 2, making the disassembly and assembly of the elastic pressing piece more convenient.

[0008] Preferably, a support block is provided at the upper end of the support rod, and the support block is used to contact the inner side of the bottom of the bottle blank.

[0009] With the above technical solution, a support block is added to the upper end of the support rod, which can prevent the tip of the support rod from contacting the inner wall of the bottle blank, thereby protecting the bottle blank.

[0010] Preferably, a supporting arc surface is provided on the top of the supporting block, and the center of the supporting arc surface is located inside the supporting block.

[0011] By adopting the above technical solution, a supporting arc surface is provided on the top of the supporting block, which can protect the inner wall of the bottle preform during the blowing process of the bottle preform.

[0012] Preferably, the upper end of the mounting seat is fixedly connected to a fixed sleeve, and the hollow stretching rod is slidably arranged on the inner side of the fixed sleeve.

[0013] Through the above technical solution, a fixed sleeve is installed on the upper end of the mounting seat, which can guide and limit the position of the bottle preform during the placement of the bottle preform.

[0014] Preferably, a guide hole is provided at the upper end of the fixing sleeve, the guide hole is flared, and the guide hole is coaxially connected to the inner hole of the fixing sleeve.

[0015] With the above technical solution, a guide hole with an expanded opening is provided at the upper end of the fixed sleeve, which can be used to guide the support rod to rotate inward, thereby making the operation of the support unit smoother.

[0016] Preferably, the support unit further includes a limit stopper, the limit stopper is located on the outside of the support rod, and the outer side wall of the limit stopper is flush with the outer side wall of the hollow stretching rod.

[0017] Through the above technical solution, the limit block can be used to limit the support rod, thereby preventing the support rod from squeezing the inner wall of the bottle blank to deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of an embodiment;

[0019] Figure 2 for Figure 1 Magnified view of part A.

[0020] Figure numerals: 1. blowing hole; 2. mounting seat; 3. hollow stretching rod; 4. supporting unit; 41. supporting rod; 42. elastic pressing piece; 43. limit block; 5. mounting protrusion; 6. plug-in slot 1; 7. fixing protrusion; 8. plug-in slot 2; 9. supporting block; 10. supporting arc surface; 11. fixing sleeve; 12. guide hole. Implementation Method

[0021] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0022] A highly applicable stretching mechanism for bottle blowing machines, such as Figure 1 、 Figure 2 As shown, it includes a mounting base 2 with a blowing hole 1 penetrating therethrough, and a hollow stretching rod 3 slidably connected to the inner side of the blowing hole 1.

[0023] The upper end of the mounting seat 2 is fixedly connected to a fixing sleeve 11 . A guide hole 12 is opened at the upper end of the fixing sleeve 11 . The guide hole 12 is flared and coaxially connected to the inner hole of the fixing sleeve 11 .

[0024] The hollow stretching rod 3 is slidably disposed within the fixed sleeve 11. Several support units 4 are evenly distributed circumferentially around the upper end of the hollow stretching rod 3. The support unit 4 comprises a support rod 41 hinged to the hollow stretching rod 3 and an elastic pressure piece 42 for driving the support rod 41 to rotate outward. A support block 9 is provided at the upper end of the support rod 41, which is configured to contact the inner side of the bottom of the preform. A support arc 10 is provided at the top of the support block 9, with the center of the support arc 10 located inside the support block 9. A mounting protrusion 5 is provided on the inner side of the support rod 41, with a first insertion groove 6 defined at its lower end. A fixing protrusion 7 is provided on the inner side of the hollow stretching rod 3, with a second insertion groove 8 defined at its upper end. The ends of the elastic pressure piece 42 are respectively inserted and fixed into the first insertion groove 6 and the second insertion groove 8. When the hollow lifting rod moves upward under the action of the external driving device, the elastic pressing piece 42 drives the support rod 41 to rotate outward through elastic force, so as to stably support the bottle blank.

[0025] The support unit 4 further includes a limit stopper 43, which is located outside the support rod 41, and whose outer sidewall is flush with the outer sidewall of the hollow stretch rod 3. The limit stopper 43 can be used to limit the extreme position of the support rod 41 when the support rod 41 rotates outward, thereby preventing the support rod 41 from squeezing the inner wall of the preform.

[0026] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementation methods. Any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection required by the present invention.

Claims

1. A stretching mechanism for a bottle blowing machine with high applicability, comprising a mounting seat (2) provided with a blowing hole (1) extending therethrough, and a hollow stretching rod (3) slidably connected to the inner side of the blowing hole (1), wherein: The upper end of the hollow stretching rod (3) is evenly distributed with a plurality of support units (4) along the circumference, and the support unit (4) includes a support rod (41) hinged to the hollow stretching rod (3), and an elastic pressing plate (42) for driving the support rod (41) to rotate outward, the upper end of the elastic pressing plate (42) is fixedly connected to the inner side of the support rod (41), and the upper end of the elastic pressing plate (42) is fixedly connected to the inner side of the hollow stretching rod (3).

2. A stretching mechanism for a bottle blowing machine with high applicability according to claim 1, characterized in that: The inner side of the support rod (41) is provided with a mounting protrusion (5), and the lower end of the mounting protrusion (5) is provided with a plug-in slot 1 (6). The inner side of the hollow stretching rod (3) is provided with a fixing protrusion (7), and the upper end of the fixing protrusion (7) is provided with a plug-in slot 2 (8). The two ends of the elastic pressing piece (42) are respectively plugged and fixed in the plug-in slot 1 (6) and the plug-in slot 2 (8).

3. The stretching mechanism for a bottle blowing machine with high applicability according to claim 1 is characterized in that: The upper end of the support rod (41) is provided with a support block (9), and the support block (9) is used to contact the inner side of the bottom of the bottle blank.

4. The stretching mechanism for a bottle blowing machine with high applicability according to claim 3 is characterized in that: A supporting arc surface (10) is provided on the top of the supporting block (9), and the center of the supporting arc surface (10) is located inside the supporting block (9).

5. The stretching mechanism for a bottle blowing machine with high applicability according to claim 1 is characterized in that: The upper end of the mounting seat (2) is fixedly connected to a fixed sleeve (11), and the hollow stretching rod (3) is slidably arranged on the inner side of the fixed sleeve (11).

6. The stretching mechanism for a bottle blowing machine with high applicability according to claim 5, characterized in that: A guide hole (12) is provided at the upper end of the fixed sleeve (11), the guide hole (12) is flared, and the guide hole (12) is coaxially connected to the inner hole of the fixed sleeve (11).

7. The stretching mechanism for a bottle blowing machine with high applicability according to claim 1 is characterized in that: The support unit (4) further comprises a limit block (43), wherein the limit block (43) is located outside the support rod (41), and the outer side wall of the limit block (43) is flush with the outer side wall of the hollow stretching rod (3).

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