Pitch changing mechanism and material moving device for polypropylene infusion bottle production

Abstract

The utility model discloses a pitch changing mechanism and a material moving device for polypropylene infusion bottle production, which belong to the field of infusion bottle production equipment and comprise a support plate, a first air cylinder, a second air cylinder, a guide rod, two limiting blocks and a plurality of positioning pieces, the guide rod is mounted on the support plate, and the two limiting blocks are arranged at two ends of the guide rod. The multiple positioning pieces are closely arranged on the guide rod in the axis direction of the guide rod, the first air cylinder and the second air cylinder are oppositely arranged on the supporting plate, the first air cylinder drives part of the positioning pieces to slide in the first direction to achieve pitch change, and the second air cylinder drives part of the positioning pieces to slide in the second direction to achieve pitch change. The first direction is opposite to the second direction, and the first direction, the second direction and the axis direction of the guide rod are on the same straight line. According to the device, the bottle preform taking and placing variable pitch is stable, no quick-wear part is replaced, the operation cost is reduced, and the production quality before bottle preform blowing is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of infusion bottle production equipment, and in particular to a variable distance mechanism for producing polypropylene infusion bottles and a material transfer device including the aforementioned variable distance mechanism for producing polypropylene infusion bottles. Background Technology

[0002] For large-volume parenteral solution manufacturers, the process of filling plastic bottles with medications in the workshop typically involves shaping polypropylene granules into preforms, then blowing the preforms into bottles. After the infusion bottles are formed, they are cleaned and the medication is filled. Notably, the size of the formed infusion bottles can change after blowing to meet the infusion needs of users with different medication volumes.

[0003] Current pitch-changing mechanisms use spring force to control the pitch expansion distance. However, the spring force is greatly affected by objective factors, resulting in unstable pitch expansion distance, making it easy for preforms to be misplaced. Moreover, the springs are prone to fatigue fracture after long-term use, requiring frequent replacement of broken springs, which increases equipment maintenance costs. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, one of the objectives of this utility model is to provide a variable pitch mechanism for the production of polypropylene infusion bottles that makes the bottle preform picking and placing stable, eliminates the need for replacement of easily damaged parts, and reduces operating costs.

[0005] In order to overcome the shortcomings of the existing technology, the second objective of this utility model is to provide a material transfer device for the production of polypropylene infusion bottles that makes the bottle preform picking and placing stable, eliminates the need for replacement of easily damaged parts, and reduces operating costs.

[0006] One of the objectives of this utility model is achieved through the following technical solution:

[0007] A pitch-changing mechanism for producing polypropylene infusion bottles includes a support plate, a first cylinder, a second cylinder, a guide rod, two limiting blocks, and multiple positioning elements. The guide rod is mounted on the support plate, and the two limiting blocks are disposed at both ends of the guide rod. The multiple positioning elements are closely arranged on the guide rod along its axial direction. The first cylinder and the second cylinder are disposed opposite to each other on the support plate. The first cylinder drives a portion of the positioning elements to slide in a first direction to achieve pitch change, and the second cylinder drives a portion of the positioning elements to slide in a second direction to achieve pitch change. The first direction and the second direction are opposite in direction, and the first direction, the second direction, and the axial direction of the guide rod are on the same straight line.

[0008] Furthermore, the number of positioning components is odd, and the positioning component located in the middle is a reference component. The reference component is fixedly mounted on the guide rod. Each pair of adjacent positioning components is relatively slidably connected through a connector. The first cylinder drives the positioning component on one side of the reference component to slide in the first direction through multiple connectors to achieve variable pitch. The second cylinder drives the positioning component on the other side of the reference component to slide in the second direction through multiple connectors to achieve variable pitch.

[0009] Furthermore, the number of the positioning components is even, and each pair of adjacent positioning components is connected to each other by a connector. The first cylinder drives half of the positioning components to slide in the first direction through multiple connectors to achieve variable pitch, and the second cylinder drives the other half of the positioning components to slide in the second direction through multiple connectors to achieve variable pitch.

[0010] Furthermore, the variable pitch mechanism for producing polypropylene infusion bottles also includes a cover plate, which is mounted on the support plate, and the first cylinder and the second cylinder are located between the support plate and the cover plate.

[0011] Furthermore, the variable pitch mechanism for producing polypropylene infusion bottles also includes two sensors, both of which are mounted on the support plate. One sensor is used to sense the incoming material signal of the preform to control the movement of the first cylinder and the second cylinder, and the other sensor is used to sense the position of the multiple positioning components after the variable pitch is completed.

[0012] The second objective of this utility model is achieved by the following technical solution:

[0013] A material transfer device for producing polypropylene infusion bottles includes a preform taking mechanism and a variable distance mechanism for producing polypropylene infusion bottles as described above. The preform taking mechanism is used to transfer multiple preforms to multiple positioning members of the variable distance mechanism, and the variable distance mechanism is used to change the distance between the multiple positioning members and the preforms.

[0014] Furthermore, the preform-retrieving mechanism includes a base, a clamping mechanism, and a clamping cylinder. It is characterized by further including two guide rails, at least two sliders, and a support base. The two guide rails are arranged parallel to each other on the base and located on the side of the base. Each guide rail has at least one slider, which is slidably mounted on the guide rail. The support base is fixedly connected to the slider. The clamping mechanism includes a mounting plate and a gripper assembly. The mounting plate is slidably mounted on the support base. The gripper assembly is equidistantly spaced on the mounting plate along its length. The gripper assembly has a clamping area facing the preform to be retrieved. The clamping cylinder is drively connected to the mounting plate and drives the mounting plate to move the gripper assembly to clamp the preform to be retrieved.

[0015] Furthermore, the preform taking device for producing polypropylene infusion bottles also includes a conveyor belt, the support base includes a lower base plate and an upper base plate, the lower base plate is fixedly connected to the slider, the upper base plate is located above the lower base plate, and the conveyor belt is rotatably disposed between the lower base plate and the upper base plate.

[0016] Furthermore, the mounting plate includes a horizontal portion and two vertical portions. The horizontal portion is elongated and located on one side of the guide rail. The two vertical portions are perpendicularly arranged on the horizontal portion and located on opposite sides of the upper base plate. The clamping cylinder is positioned between the two vertical portions. Furthermore, the pressure block has an L-shaped cross-section.

[0017] Compared with the prior art, the variable pitch mechanism for producing polypropylene infusion bottles of this utility model includes a support plate, a first cylinder, a second cylinder, a guide rod, two limiting blocks, and multiple positioning components. The guide rod is mounted on the support plate, the two limiting blocks are set at both ends of the guide rod, and the multiple positioning components are closely arranged on the guide rod along the axial direction. The first cylinder and the second cylinder are arranged opposite to each other on the support plate. The first cylinder drives some positioning components to slide in a first direction to achieve variable pitch, and the second cylinder drives some positioning components to slide in a second direction to achieve variable pitch. The first direction and the second direction are opposite, and the first direction, the second direction, and the axial direction of the guide rod are on the same straight line.

[0018] In use, this application employs a sensor that detects the incoming preform signal and controls a first cylinder to drive a positioning component to slide in a first direction to achieve pitch change. A second cylinder then drives a positioning component to slide in a second direction to achieve pitch change. After multiple positioning components complete pitch change, another sensor detects their positions to provide feedback on the completion of the pitch change. This application ensures stable pitch change during preform handling, eliminates the need for replacing easily damaged parts, reduces operating costs, and guarantees production quality before preform blowing. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the material transfer device for producing polypropylene infusion bottles according to this utility model;

[0020] Figure 2 for Figure 1 A schematic diagram of the preform-taking mechanism of a material transfer device used in the production of polypropylene infusion bottles;

[0021] Figure 3 for Figure 2 Enlarged view of point A in the preform taking mechanism of the material transfer device used in the production of polypropylene infusion bottles;

[0022] Figure 4 This is a schematic diagram of the variable pitch mechanism for the production of polypropylene infusion bottles according to this utility model.

[0023] Figure 5 for Figure 4 A schematic diagram of the structure of the pitch-changing mechanism after pitch change is completed in the production of polypropylene infusion bottles.

[0024] In the diagram: 10. Embryo taking mechanism; 11. Base; 12. Guide rail; 13. Support seat; 131. Lower base plate; 132. Upper base plate; 14. Clamping mechanism; 141. Mounting plate; 1411. Horizontal part; 1412. Vertical part; 142. Gripper assembly; 1421. Gripper; 1422. Clamping area; 15. Clamping cylinder; 16. Mounting seat; 17. Conveyor belt; 18. Motor; 20. Pitch-changing mechanism; 21. Support plate; 22. First cylinder; 23. Second cylinder; 24. Guide rod; 25. Limiting block; 26. Positioning component; 27. Cover plate; 28. Sensor. Detailed Implementation

[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Figures 4-5 The variable pitch mechanism 20 for producing polypropylene infusion bottles of this utility model includes a support plate 21, a first cylinder 22, a second cylinder 23, a guide rod 24, two limit blocks 25, and multiple positioning components 26.

[0029] In this embodiment:

[0030] Guide rods 24 are mounted on support plate 21. In this embodiment, there are two guide rods 24.

[0031] Two limiting blocks 25 are set at both ends of the guide rod 24 to limit the two outermost positioning parts 26 after the pitch change is completed.

[0032] Multiple positioning elements 26 are closely arranged on the guide rod 24 along the axial direction of the guide rod 24.

[0033] The first cylinder 22 and the second cylinder 23 are arranged opposite to each other on the support plate 21. The first cylinder 22 is used to drive the partial positioning member 26 to slide in the first direction to achieve a change in pitch, and the second cylinder 23 is used to drive the partial positioning member 26 to slide in the second direction to achieve a change in pitch. The first direction and the second direction are opposite, and the first direction, the second direction and the axis of the guide rod 24 are on the same straight line.

[0034] In one embodiment, the number of positioning members 26 is odd, and the positioning member 26 located in the middle is a reference member. The reference member is fixedly mounted on the guide rod 24. Each pair of adjacent positioning members 26 are connected to each other by a connector. The first cylinder 22 drives the positioning member 26 on one side of the reference member to slide in the first direction through multiple connectors to achieve a change in pitch. The second cylinder 23 drives the positioning member 26 on the other side of the reference member to slide in the second direction through multiple connectors to achieve a change in pitch.

[0035] In another embodiment, the number of positioning members 26 is even, and each pair of adjacent positioning members 26 is connected to each other by a connector. The first cylinder 22 drives half of the positioning members 26 to slide in the first direction through multiple connectors to achieve variable pitch, and the second cylinder 23 drives the other half of the positioning members 26 to slide in the second direction through multiple connectors to achieve variable pitch.

[0036] The cover plate 27 is installed on the support plate 21, and the first cylinder 22 and the second cylinder 23 are located between the support plate 21 and the cover plate 27, which serve to protect them.

[0037] Both sensors 28 are mounted on the support plate 21. Specifically, they can be mounted on the two limit blocks 25. One sensor 28 is used to sense the incoming signal of the preform to control the movement of the first cylinder 22 and the second cylinder 23. The other sensor 28 is used to sense the position of the multiple positioning components 26 after the pitch change is completed, so as to provide feedback on the pitch change status of the multiple positioning components 26.

[0038] In use, a sensor 28 detects the incoming signal of the preform and controls a first cylinder 22 to drive some positioning components 26 to slide in a first direction to achieve pitch change. A second cylinder 23 drives some positioning components 26 to slide in a second direction to achieve pitch change. After multiple positioning components 26 complete pitch change, another sensor 28 senses the position of the multiple positioning components 26 to provide feedback on the completion of the pitch change. This application ensures stable pitch change during preform handling, eliminates the need for replacing easily damaged parts, reduces operating costs, and guarantees production quality before preform blowing.

[0039] like Figure 1-3 As shown, this application also provides a material transfer device for the production of polypropylene infusion bottles, including a preform taking mechanism 10 and the aforementioned variable distance mechanism 20 for the production of polypropylene infusion bottles.

[0040] The embryo-removing mechanism 10 includes a base 11, two guide rails 12, at least two sliders, a support 13, a clamping mechanism 14, and a clamping cylinder 15.

[0041] Two guide rails 12 are arranged parallel to each other on the base 11 and located on the side of the base 11. Each guide rail 12 has at least one slider, which is slidably mounted on the guide rail 12. In this embodiment, there are four sliders, with two sliders arranged sequentially along the length of each guide rail 12, which ensures that the clamping mechanism 14 is more stable during operation.

[0042] The support base 13 is fixedly connected to the slider. The support base 13 includes a lower base plate 131 and an upper base plate 132. The lower base plate 131 is fixedly connected to the slider, and the upper base plate 132 is located above the lower base plate 131. By setting the support base 13, this application ensures that the clamping mechanism 14 does not directly contact the slider, and the center of gravity of the clamping mechanism 14 is balanced with the center of gravity of the support base 13, thus ensuring stability during operation.

[0043] The conveyor belt 17 is rotatably positioned between the lower base plate 131 and the upper base plate 132.

[0044] The motor 18 is located on one side of the base 11 and is connected to the conveyor belt 17. The motor 18 drives the conveyor belt 17 to rotate and drives the slider and the support seat 13 to move along the length of the guide rail 12.

[0045] The clamping mechanism 14 includes a mounting plate 141 and a gripper assembly 142. The mounting plate 141 is slidably mounted on the support base 13. Specifically, the mounting plate 141 includes a horizontal portion 1411 and two vertical portions 1412. The horizontal portion 1411 is located on one side of the guide rail 12 and is elongated. The two vertical portions 1412 are vertically arranged on the horizontal portion 1411 and are located on both sides of the upper base plate 132, respectively. In this embodiment, the sliding direction of the mounting plate 141 is perpendicular to the length direction of the guide rail 12.

[0046] The gripper assembly 142 is equidistantly arranged on the mounting plate 141 along the length direction of the mounting plate 141. The gripper assembly 142 includes two grippers 1421 arranged opposite to each other, and a gripping area 1422 is formed between the two grippers 1421. The gripping area 1422 faces the preform to be picked.

[0047] The clamping cylinder 15 is connected to the mounting plate 141 and drives the mounting plate 141 to move the gripper assembly 142 to clamp the preform to be taken. In this embodiment, the clamping cylinder 15 is arranged between the two vertical parts 1412, and the overall structure is reasonably laid out.

[0048] Mounting base 16 is mounted on support base 13, and clamping cylinder 15 is mounted on mounting base 16. The length direction of clamping cylinder 15 is perpendicular to the length direction of guide rail 12.

[0049] In use, the slider first moves the support base 13 and the clamping mechanism 14 to a suitable position. Then, the clamping cylinder 15 drives the clamping mechanism 14 to clamp multiple preforms at once. These preforms are then transferred to multiple positioning elements 26 of the pitch-changing mechanism 20, which changes the distance between the positioning elements 26 and the preforms. In this application, by setting two sets of guide rails 12 with sliders and a support base 13 fixedly connected to the sliders, the clamping mechanism 14 does not directly contact the sliders. The center of gravity of the clamping mechanism 14 is balanced with the center of gravity of the support base 13, preventing instability during operation, improving production efficiency, preventing damage to the preforms, and ensuring the quality of subsequent blow molding. This application has a compact overall structure, reasonable layout, small footprint, and is easy to transport.

[0050] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pitch changing mechanism (20) for polypropylene infusion bottle production, characterized by: The device includes a support plate (21), a first cylinder (22), a second cylinder (23), a guide rod (24), two limiting blocks (25), and multiple positioning elements (26). The guide rod (24) is mounted on the support plate (21), and the two limiting blocks (25) are disposed at both ends of the guide rod (24). The multiple positioning elements (26) are closely arranged on the guide rod (24) along the axial direction of the guide rod (24). The first cylinder (22) and the second cylinder (23) are disposed opposite to each other on the support plate (21). The first cylinder (22) drives part of the positioning elements (26) to slide in a first direction to achieve a variable pitch, and the second cylinder (23) drives part of the positioning elements (26) to slide in a second direction to achieve a variable pitch. The first direction and the second direction are opposite to each other, and the first direction, the second direction, and the axial direction of the guide rod (24) are on the same straight line.

2. The variable pitch mechanism (20) for polypropylene infusion bottle production according to claim 1, characterized in that: The number of positioning elements (26) is odd. The positioning element (26) located in the middle is a reference element. The reference element is fixedly installed on the guide rod (24). Each pair of adjacent positioning elements (26) is connected to each other by a connector. The first cylinder (22) drives the positioning element (26) on one side of the reference element to slide in the first direction through multiple connectors to achieve pitch change. The second cylinder (23) drives the positioning element (26) on the other side of the reference element to slide in the second direction through multiple connectors to achieve pitch change.

3. The variable pitch mechanism (20) for polypropylene infusion bottle production according to claim 1, characterized in that: The number of the positioning elements (26) is even. Each pair of adjacent positioning elements (26) is connected to each other by a connector. The first cylinder (22) drives half of the positioning elements (26) to slide in the first direction through multiple connectors to achieve variable pitch. The second cylinder (23) drives the other half of the positioning elements (26) to slide in the second direction through multiple connectors to achieve variable pitch.

4. The variable pitch mechanism (20) for polypropylene infusion bottle production according to claim 1, characterized in that: The variable pitch mechanism (20) for producing polypropylene infusion bottles also includes a cover plate (27), which is mounted on the support plate (21). The first cylinder (22) and the second cylinder (23) are located between the support plate (21) and the cover plate (27).

5. The variable pitch mechanism (20) for polypropylene infusion bottle production as claimed in claim 1, characterized in that: The variable pitch mechanism (20) for producing polypropylene infusion bottles also includes two sensors (28). Both sensors (28) are mounted on the support plate (21). One sensor (28) is used to sense the incoming material signal of the preform to control the movement of the first cylinder (22) and the second cylinder (23). The other sensor (28) is used to sense the position of the multiple positioning elements (26) after the variable pitch is completed.

6. A material transfer device for polypropylene infusion bottle production, characterized by: The device includes a preform taking mechanism (10) and a variable distance mechanism (20) for producing polypropylene infusion bottles as described in any one of claims 1 to 5. The preform taking mechanism (10) is used to transfer multiple preforms to multiple positioning members (26) of the variable distance mechanism (20), and the variable distance mechanism (20) is used to change the distance between the multiple positioning members (26) and the preforms.

7. The material transfer device for polypropylene infusion bottle production as claimed in claim 6, wherein: The embryo-removing mechanism (10) includes a base (11), a clamping mechanism (14), and a clamping cylinder (15). It is characterized by further including two guide rails (12), at least two sliders, and a support base (13). The two guide rails (12) are arranged parallel to each other on the base (11) and located on the side of the base (11). Each guide rail (12) has at least one slider, which is slidably mounted on the guide rail (12). The support base (13) is fixedly connected to the slider. The clamping mechanism (14) includes... Mounting plate (141) and gripper assembly (142). Mounting plate (141) is slidably mounted on support base (13). Gripper assembly (142) is equidistantly arranged on mounting plate (141) along the length direction of mounting plate (141). Gripper assembly (142) has a gripping area (1422) facing the bottle preform to be picked up. Gripper cylinder (15) is connected to mounting plate (141) and drives mounting plate (141) to drive gripper assembly (142) to move to grip bottle preform to be picked up.

8. The material transfer device for polypropylene infusion bottle production as claimed in claim 7, wherein: The preform taking device for producing polypropylene infusion bottles also includes a conveyor belt (17). The support base (13) includes a lower base plate (131) and an upper base plate (132). The lower base plate (131) is fixedly connected to the slider. The upper base plate (132) is located above the lower base plate (131). The conveyor belt (17) is rotatably disposed between the lower base plate (131) and the upper base plate (132).

9. The material transfer device for polypropylene infusion bottle production as claimed in claim 8, wherein: The mounting plate (141) includes a horizontal part (1411) and two vertical parts (1412). The horizontal part (1411) is located on one side of the guide rail (12) and is elongated. The two vertical parts (1412) are vertically arranged on the horizontal part (1411) and are located on both sides of the upper base plate (132). The clamping cylinder (15) is located between the two vertical parts (1412).

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