An adjustable sizing sleeve

Abstract

This utility model discloses an adjustable sizing sleeve, belonging to the field of plastic pipe sizing technology. It includes: a sizing sleeve body with an axially extending groove on its surface; two retaining rings, each connected to the outer wall of the sizing sleeve body, located on opposite sides of the groove; and an adjusting member connected to the two retaining rings. By adjusting the tightness of the adjusting member, the two retaining rings are moved closer or further apart, causing the sizing sleeve body to open outward or close inward along the groove, thereby adjusting the inner diameter of the sizing sleeve body. Through the linkage structure of the retaining rings and the adjusting member, combined with the groove design on the sizing sleeve body, the sizing sleeve possesses excellent elastic deformation capability, enabling minute inner diameter adjustment of the sizing sleeve body, significantly improving sizing accuracy, and is particularly suitable for the production of small-diameter plastic pipes with strict dimensional control requirements.

Description

Technical Field

[0001] This utility model belongs to the field of plastic pipe sizing technology, specifically relating to an adjustable sizing sleeve. Background Technology

[0002] In the extrusion molding process of plastic pipes, the sizing sleeve is a key shaping component. Its function is to cool and calibrate the dimensions of the freshly extruded soft pipe, ensuring that the outer diameter and surface quality of the pipe meet the requirements.

[0003] To address the differences in raw material properties or to correct the impact of wear on the inner diameter of the sizing sleeve on the outer diameter of the pipe, it is often necessary to fine-tune the inner diameter of the sizing sleeve to ensure stable finished product quality.

[0004] Existing sizing sleeve structures with adjustment functions cannot meet the high-precision fine-tuning requirements of small-diameter pipes, and their overall structural design is complex and inconvenient to operate. Utility Model Content

[0005] This invention addresses the aforementioned problems in the existing technology by proposing an adjustable sizing sleeve capable of fine-tuning the inner diameter.

[0006] This utility model can be achieved through the following technical solutions:

[0007] An adjustable sizing sleeve includes:

[0008] The sizing sleeve body has an axially extending slot on its surface;

[0009] Two retaining rings are provided and are respectively connected to the outer wall of the sizing sleeve body, with the two retaining rings located on both sides of the slot;

[0010] An adjusting element, connected to the two retaining rings, is used to adjust the tightness of the adjusting element, causing the two retaining rings to move closer or further apart, thereby causing the sizing sleeve body to open outward or close inward along the slot, thus adjusting the inner diameter of the sizing sleeve body.

[0011] As a further improvement of this utility model, the two retaining rings are symmetrically arranged on both sides of the slot.

[0012] As a further improvement of this utility model, the retaining ring is fixed to the sizing sleeve body by welding or screwing.

[0013] As a further improvement of this utility model, the mating surfaces of the two retaining rings are located on the central axis of symmetry of the slot.

[0014] As a further improvement of this utility model, one end of the sizing sleeve body is a connecting end and is connected to a mounting flange, and the other end is a pipe output end.

[0015] As a further improvement of this utility model, the retaining ring is positioned on the sizing sleeve body closer to the pipe output end than the connecting end.

[0016] As a further improvement of this utility model, the position of the retaining ring on the sizing sleeve body is such that there is a distance between it and the output end of the pipe.

[0017] As a further improvement of this utility model, one end of the groove extends to the pipe output end of the sizing sleeve body, and a distance is left between the other end of the groove and the connecting end of the sizing sleeve body.

[0018] As a further improvement of this utility model, the slot extends in a wavy shape on the surface of the sizing sleeve body.

[0019] As a further improvement of this utility model, the surface of the sizing sleeve body is also provided with several vacuum grooves.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. By setting a linkage structure between the retaining ring and the adjusting component, combined with the slotted design on the sizing sleeve body, the sizing sleeve has good elastic deformation ability, which can realize micro-inner diameter adjustment of the sizing sleeve body, significantly improving the shaping accuracy. It is especially suitable for the production of small-diameter plastic pipes with strict size control requirements.

[0022] 2. The retaining rings are symmetrically arranged on both sides of the slot, and the mating surface is located on the central axis of symmetry of the slot. The connection direction of the adjusting parts is perpendicular to the mating surface, ensuring that the adjusting force acts symmetrically and evenly on the sizing sleeve body, avoiding eccentric deformation and local stress concentration, improving the stability of adjustment and repeatability of positioning accuracy, and ensuring product quality consistency.

[0023] 3. The installation position of the retaining ring on the sizing sleeve body is closer to the pipe output end than the connecting end of the sizing sleeve body, and a certain distance is maintained between them. This position range not only improves the convenience and efficiency of adjustment operation, but also effectively controls the response amplitude of the elastic deformation of the sizing sleeve, making the fine adjustment process more sensitive, stable and controllable, thereby improving the sizing accuracy and adjustment performance. Attached Figure Description

[0024] Figure 1 This is a structural schematic diagram of the adjustable sizing sleeve of this utility model;

[0025] Figure 2 This is a cross-sectional view of the retaining ring and sizing sleeve body of this utility model.

[0026] In the diagram, 100 is the sizing sleeve body; 110 is the slot; 120 is the retaining ring; 121 is the adjusting component; 130 is the vacuum tank; and 140 is the mounting flange. Detailed Implementation

[0027] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. The technical methods of the present invention will be further described, but the present invention is not limited to these embodiments.

[0028] like Figures 1-2 As shown, this utility model provides an adjustable sizing sleeve, comprising:

[0029] The sizing sleeve body 100 has an axially extending slot 110 on its surface, which gives the sizing sleeve body 100 a certain elastic deformation capacity, thereby realizing dynamic adjustment of the inner diameter.

[0030] Two retaining rings 120 are provided and are respectively connected to the outer wall of the sizing sleeve body 100. The two retaining rings 120 are located on both sides of the slot 110.

[0031] Adjusting element 121 is connected to two retaining rings 120 to form a stable and reliable adjusting mechanism. By adjusting the tightness of adjusting element 121, the two retaining rings 120 are driven to move closer or further apart, thereby causing the sizing sleeve body 100 to open outward or close inward along the slot 110 to adjust the inner diameter of the sizing sleeve body 100.

[0032] It should be noted that most existing sizing sleeves are fixed structures, or although they have certain adjustment functions, they generally have problems such as numerous parts, complex operation, and poor adjustment accuracy. Especially in the extrusion molding process of small-diameter plastic pipes, due to the small size and thin wall of the pipes, the matching accuracy of the inner diameter of the sizing sleeve is extremely high. Traditional structures are difficult to achieve high-precision fine adjustment, which affects product quality and production efficiency.

[0033] In contrast, the solution provided in this embodiment uses two retaining rings 120 in conjunction with an adjusting member 121 to adjust the inner diameter of the sizing sleeve body 100. The adjusting member 121 can be set as an adjusting bolt, which has threaded transmission characteristics. During rotation, it can drive the two retaining rings 120 to generate a small and continuous relative displacement, thereby making the elastic deformation of the sizing sleeve body 100 small and continuous. This provides higher adjustment accuracy and is particularly suitable for the production needs of small-diameter plastic pipes with high shaping accuracy requirements.

[0034] Overall, the adjustable sizing sleeve provided in this embodiment not only realizes the fine adjustment function of the inner diameter of the sizing sleeve, but also significantly improves the adjustment accuracy and ease of operation. It effectively solves the technical problems of existing sizing sleeves, such as complex structure, inconvenient adjustment, and low adjustment accuracy, and has good application prospects and promotion value.

[0035] Preferably, the two retaining rings 120 are symmetrically arranged on both sides of the slot 110, so that when the adjusting member 121 applies force, it can drive the two retaining rings 120 to move inward or outward at the same amplitude, thereby uniformly acting on the slot 110 area of ​​the sizing sleeve body 100, causing the area to produce symmetrical and controllable elastic deformation.

[0036] The two symmetrically arranged retaining rings 120 can avoid eccentric deformation or local stress concentration caused by asymmetrical force, ensuring that the inner hole of the sizing sleeve always maintains good roundness.

[0037] Preferably, the retaining ring 120 is welded or screwed to the sizing sleeve body 100, thereby ensuring that the inner diameter of the sizing sleeve body 100 can be adjusted simply by controlling the movement of the retaining ring 120, making the entire adjustment process simpler and more convenient.

[0038] The welding method enables a high-strength integrated connection between the retaining ring 120 and the sizing sleeve body 100, avoiding loosening caused by vibration or uneven force during adjustment, thereby ensuring adjustment accuracy and structural stability.

[0039] As a detachable connection method, the screw connection facilitates quick disassembly and assembly when the retaining ring 120 wears or the sizing sleeve body 100 needs to be replaced, reducing maintenance costs and improving the maintainability and efficiency of the equipment.

[0040] Preferably, the mating surfaces of the two retaining rings 120 are located on the central axis of symmetry of the slot 110, which can ensure that the force applied by the adjusting member 121 is evenly distributed along the center of the slot 110, avoiding uneven deformation of the sizing sleeve body 100 due to eccentric force, thereby improving the accuracy and consistency of the inner diameter adjustment.

[0041] Furthermore, when the mating surface of the retaining ring 120 is aligned with the center of the slot 110, the stress generated during the adjustment process can be more evenly distributed on the sizing sleeve body 100, effectively avoiding material fatigue or deformation failure caused by local stress concentration and extending the service life of the equipment.

[0042] Overall, by setting the mating surfaces of the two retaining rings 120 on the central axis of symmetry of the slot 110, not only is the symmetrical transmission of force and the uniform and controllable adjustment process achieved, but the overall stability and adjustment accuracy of the sizing sleeve structure are also improved. This is particularly suitable for the extrusion molding process of small-diameter plastic pipes with high requirements for shaping accuracy.

[0043] In addition, the adjusting member 121 connects the two retaining rings 120 in a direction perpendicular to the mating surface of the retaining rings 120. This vertical connection method ensures that the adjusting force acts on the two retaining rings 120 along the axis of symmetry, avoiding the offset of the retaining rings 120 or the local deformation of the sizing sleeve body 100 due to oblique force, thereby ensuring the uniformity and symmetry of the inner diameter change of the sizing sleeve body 100 and improving the shaping accuracy.

[0044] Preferably, one end of the sizing sleeve body 100 is a connecting end connected to a mounting flange 140, and the other end is a pipe output end. The mounting position of the retaining ring 120 on the sizing sleeve body 100 has specific considerations, as detailed below:

[0045] (1) The position of the retaining ring 120 is closer to the pipe output end than the connection end;

[0046] (2) A certain distance is maintained between the retaining ring 120 and the pipe output end.

[0047] The circlip 120 is positioned within the aforementioned specific area primarily based on a comprehensive consideration of the elastic deformation characteristics, adjustment sensitivity, and ease of operation of the sizing sleeve.

[0048] First, if the retaining ring 120 is too close to the connection end, the point of action will be far from the pipe output end, which will result in a large force required during the adjustment process and make the adjustment bolt operation difficult.

[0049] By appropriately shifting it towards the insertion end, the lever arm between the force point and the deformation area can be shortened, improving adjustment efficiency and making fine-tuning easier and more precise.

[0050] Secondly, if the retaining ring 120 is installed too close to the pipe output end, or even directly at the insertion end, it will reduce the rigidity of the sizing sleeve body 100, which will be detrimental to achieving high-precision fine-tuning control. Therefore, maintaining a certain safe distance between the retaining ring 120 and the output end helps to buffer the adjustment response and improve the controllability of the adjustment process.

[0051] Preferably, one end of the groove 110 extends to the pipe output end of the sizing sleeve body 100, the other end of the groove 110 is spaced apart from the connection end of the sizing sleeve body 100, and the groove 110 extends in a wavy shape on the surface of the sizing sleeve body 100.

[0052] Preferably, the surface of the sizing sleeve body 100 is also provided with several vacuum grooves 130, which are used to connect with an external vacuum system during the sizing process. Through the negative pressure, the freshly extruded plastic tube is tightly attached to the inner wall of the sizing sleeve body 100, thereby achieving more efficient and stable cooling and shaping.

[0053] The technical means disclosed in this utility model are not limited to those described above, but also include technical solutions composed of any combination of the above technical features. The above are specific embodiments of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

[0054] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0055] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0056] The technical solutions of the various embodiments of this utility model can be combined with each other, but only if they can be implemented by those skilled in the art. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope claimed by this utility model.

[0057] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An adjustable sizing sleeve, comprising: include: The sizing sleeve body has an axially extending slot on its surface; Two retaining rings are provided and are respectively connected to the outer wall of the sizing sleeve body, with the two retaining rings located on both sides of the slot; An adjusting element, connected to the two retaining rings, is used to adjust the tightness of the adjusting element, causing the two retaining rings to move closer or further apart, thereby causing the sizing sleeve body to open outward or close inward along the slot, thus adjusting the inner diameter of the sizing sleeve body.

2. An adjustable sizing sleeve according to claim 1, wherein, The two retaining rings are symmetrically arranged on both sides of the slot.

3. The adjustable sizing sleeve of claim 1 wherein, The retaining ring is fixed to the sizing sleeve body by welding or screwing.

4. The adjustable sizing sleeve of claim 1 wherein, The mating surfaces of the two retaining rings are located on the central axis of symmetry of the slot.

5. An adjustable sizing sleeve according to claim 1, characterized in that, One end of the sizing sleeve body is a connecting end connected to a mounting flange, and the other end is a pipe output end.

6. An adjustable sizing sleeve according to claim 5, wherein, The retaining ring is positioned on the sizing sleeve body closer to the pipe output end than the connecting end.

7. An adjustable sizing sleeve according to claim 5, wherein, The retaining ring is positioned on the sizing sleeve body with a distance between it and the output end of the pipe.

8. The adjustable sizing sleeve of claim 5 wherein, One end of the groove extends to the pipe output end of the sizing sleeve body, and the other end of the groove is separated from the connection end of the sizing sleeve body.

9. The adjustable sizing sleeve of claim 1 wherein, The slot extends in a wavy shape on the surface of the sizing sleeve body.

10. The adjustable sizing sleeve of claim 1 wherein, The surface of the sizing sleeve body is also provided with several vacuum grooves.

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