Plastic roll fixing frame for plastic packaging bag production
By designing a stepped bushing and a limiting mechanism, the problem of relative sliding when faced with fluctuations in the inner diameter of traditional plastic roll fixing frames is solved, realizing the self-centering and stable limiting of the roll, and improving production accuracy and operating efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-06
- Publication Date
- 2026-04-07
AI Technical Summary
When faced with the demands of flexible production, traditional plastic roll fixing frames suffer from fluctuations in the inner diameter of the fixed support shaft and the roll, leading to a decrease in the coefficient of friction. This results in relative sliding and movement during the unloading process, and the compensation mechanism fails, especially at high speeds, affecting production accuracy.
The device employs stepped bushings and a limiting mechanism. Through the design of rings and frustoconical sleeves with different outer diameters, it achieves self-centering of the material roll. The limiting mechanism allows for axial and radial movement to adapt to material rolls of different specifications. Combined with the support structure, the limiting performance is improved.
It achieves stable fixing of material rolls of different specifications, avoids relative rotation, improves production accuracy and efficiency, and simplifies loading and unloading operations.
Smart Images
Figure CN224091254U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of plastic packaging bag production, specifically to a plastic packaging bag production plastic roll fixing frame. BACKGROUND
[0002] The raw material (such as polyethylene or polypropylene) of plastic packaging bag is melted and extruded into a film shape by an extruder. After the film-shaped plastic is cooled and hardened, it needs to be processed subsequently, such as printing, compounding, etc. In this process, the plastic roll fixing frame is a key component. For example, in the printing process, it can accurately fix the plastic film roll, ensuring that the position of the film does not deviate during the printing process. In addition, during the subsequent fine processing of the packaging bag, such as cutting into various shapes, the fixing frame can keep the film roll on the correct conveying track, enabling the cutting process to be accurately performed according to the design, avoiding problems such as size deviation or uneven edges.
[0003] The core structure of traditional plastic roll fixing frames usually adopts a fixed support shaft design, which supports the inner circle of the roll for rotation and material discharge through a rigid shaft. However, with the increasing demand for flexible production in manufacturing, this structure gradually exposes the following technical defects: the fixed support shaft and the inner diameter of the roll need to be strictly matched within a certain tolerance, but in actual production, the inner diameter of the roll fluctuates by ±3-5mm. When the gap exceeds 0.8mm, the friction coefficient of the contact surface between the material roll and the support shaft decreases sharply, causing relative sliding during the material discharge process. To avoid relative sliding, a spring needle type radial compensation is often used, but the compensation force decays nonlinearly with displacement. Under high-speed material discharge conditions, the centrifugal force causes the compensation mechanism to fail, which easily leads to axial movement of the roll. SUMMARY
[0004] Therefore, it is necessary to provide a plastic packaging bag production plastic roll fixing frame to solve the problem of relative sliding between the fixed support shaft and the roll of the existing plastic roll fixing frame.
[0005] To achieve the above-mentioned purposes, the utility model adopts the following technical solutions:
[0006] A plastic packaging bag production plastic roll fixing frame, comprising a support, a stepped shaft sleeve, and a limiting mechanism.
[0007] The support comprises a bottom support part, a side support part connected perpendicularly to the bottom support part, and a support shaft connected to the top bearing of the side support part. A hole is formed in the side support part.
[0008] The stepped shaft sleeve comprises a plurality of ring sleeves with different outer diameters and a conical sleeve connecting adjacent ring sleeves. The plurality of ring sleeves are linearly arranged at equal distances according to the length of the outer diameter from small to large. Adjacent ring sleeves are connected as a whole through the conical sleeve and are fixedly installed on the outer peripheral surface of the support shaft. The end with the larger diameter is close to the side support part.
[0009] The limiting mechanism is movably installed on the side supporting part, and the movable end crosses the opening one of the side supporting part to limit the plastic reel with a diameter larger than the stepped shaft sleeve.
[0010] Further, the outer circumferential surface of the one end of the supporting shaft away from the side supporting part is sleeved with a limiting shaft sleeve with the same structure as the stepped shaft sleeve, and the limiting shaft sleeve is oppositely arranged with the stepped shaft sleeve.
[0011] Further, the one end of the limiting shaft sleeve away from the side supporting part is fixedly connected with an extension rod.
[0012] Further, the outer circumferential surface of the one end of the supporting shaft away from the side supporting part is sleeved with a positioning shaft sleeve in the shape of a truncated cone, and the smaller-diameter end of the positioning shaft sleeve faces the stepped shaft sleeve.
[0013] Further, the one end of the positioning shaft sleeve away from the side supporting part is fixedly connected with a supporting rod.
[0014] Further, the limiting mechanism comprises an arc-shaped block, a limiting protrusion and an adjusting part; the arc-shaped block crosses the opening one of the side supporting part, the top of the one end of the arc-shaped block close to the stepped shaft sleeve is fixedly connected with the limiting protrusion matched with the end hole of the plastic reel, and the other end is slidingly connected with the adjusting part; the adjusting part is installed on the side supporting part to adjust the radial distance between the arc-shaped block and the stepped shaft sleeve.
[0015] Further, the adjusting part comprises a fixed block, an adjusting bolt and a sliding block; the sliding block is slidingly arranged on the arc-shaped block, and the sliding direction of the sliding block is parallel to the axial direction of the supporting shaft; the fixed block is installed on the side supporting part and located at the periphery of the opening one with a fixed distance; and the adjusting bolt is threadedly connected with the fixed block, and the end of the adjusting bolt is movably connected with the sliding block.
[0016] Further, the adjusting part comprises a telescopic air cylinder and a sliding block; the fixed end of the telescopic air cylinder is installed on the side supporting part and located at the periphery of the opening one of the side supporting part, the movable end faces the opening one of the side supporting part and is connected with the sliding block, and the sliding block is slidingly arranged on the arc-shaped block, and the sliding direction of the sliding block is parallel to the axial direction of the supporting shaft.
[0017] Further, the top of the bottom supporting part is installed with a supporting structure, and the supporting structure is in contact with the one end of the supporting shaft away from the side supporting part.
[0018] Further, the supporting structure comprises a jacking air cylinder and a supporting plate; the fixed end of the jacking air cylinder is connected with the bottom supporting part, the movable end faces upward and is connected with the supporting plate, and the inner side curvature of the supporting plate is matched with the outer circumferential surface of the supporting shaft.
[0019] Compared with the prior art, the beneficial effects of the utility model include:
[0020] 1. The utility model discloses a different outer diameter shaft sleeve of ladder shaft sleeve can ensure that different specifications material roll realizes axial self-centering, has greater strain while overcoming the problem of relative rotation of support shaft and material pipe diameter, and when the material roll specification is greater than the maximum outer diameter of ladder shaft sleeve, can adopt the limiting stop mechanism to limit, increase the limiting range of different specifications material roll, avoid the relative rotation between material roll and support shaft.
[0021] 2. The utility model discloses the limiting stop mechanism can move on the axial direction and radial direction of support shaft, two -dimensional movement adapts to different specifications material roll, improves the limiting performance, in addition, set up the support structure that can move longitudinally supports support shaft while facilitating the operation of feeding and discharging, saves feeding and discharging operation time. DRAWINGS
[0022] The disclosure of the utility model will be explained with reference to the drawings. It should be appreciated that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the utility model. In the drawings, the same reference signs are used to refer to the same parts. Among them:
[0023] Figure 1 It is a perspective view of a plastic roll fixing frame for plastic packaging bag production introduced in the utility model embodiment 1;
[0024] Figure 2 It is the connection schematic drawing of side support part and limiting stop mechanism based on Figure 1
[0025] Figure 3 It is the structure schematic drawing of limiting stop mechanism based on Figure 1
[0026] Figure 4 It is a perspective view of a plastic roll fixing frame for plastic packaging bag production introduced in the utility model embodiment 2
[0027] Figure 5 It is the structure schematic drawing of limiting stop mechanism introduced in the utility model embodiment 3.
[0028] Marking in the drawing: 1, support; 11, bottom support part; 12, side support part; 13, support shaft; 2, ladder shaft sleeve; 21, ring sleeve; 22, conical sleeve; 3, limiting stop mechanism; 31, arc block; 32, limiting stop protruding block; 33, adjusting part; 331, fixed block; 332, adjusting bolt; 333, sliding block; 334, telescopic pneumatic cylinder; 4, limiting stop shaft sleeve; 5, extension rod; 6, positioning shaft sleeve; 7, support rod; 8, support structure; 81, jacking pneumatic cylinder; 82, supporting plate. DETAILED DESCRIPTION
[0029] It is easy to understand that according to the technical scheme of the utility model, a plurality of structure modes and implementation modes which can be replaced with each other can be proposed by the general skilled in the art without changing the essential spirit of the utility model. Therefore, the following specific embodiments and drawings are only exemplary description of the technical scheme of the utility model, and should not be regarded as the whole of the utility model or regarded as the limitation or restriction of the technical scheme of the utility model.
[0030] Embodiment 1
[0031] Please refer to Figure 1 The embodiment introduces a plastic packaging bag production plastic roll fixing frame, which mainly comprises a support 1, a stepped shaft sleeve 2, a limiting mechanism 3 and a supporting structure 8.
[0032] The support 1 comprises a bottom support part 11, a side support part 12 connected perpendicularly with the bottom support part 11 and a supporting shaft 13 connected with a bearing at the top of the side support part 12. The side support part 12 is located at the top side edge of the bottom support part 11, and the supporting structure 8 is located at the other side edge of the bottom support part 11. A hole is horizontally formed at the top position of the side support part 12, a bearing is embedded in the hole, the inner wall of the bearing is connected with one end of the supporting shaft 13, the rotation of the supporting shaft 13 is satisfied, and the other end of the supporting shaft 13 is in contact with the supporting structure 8. An opening one for the limiting mechanism 3 to pass through is also formed in the side support part 12, the opening one is adapted to the limiting mechanism 3 and located at the periphery of the supporting shaft 13.
[0033] The supporting structure 8 can be composed of a jacking cylinder 81 and a supporting plate 82. The fixed end of the jacking cylinder 81 is connected with the bottom support part 11, the movable end is upward and connected with the supporting plate 82, and the inner side curvature of the supporting plate 82 is matched with the outer peripheral surface of the supporting shaft 13. The jacking cylinder 81 of the supporting structure 8 can also be replaced by a hydraulic telescopic rod or an electric telescopic rod, which is selected according to actual needs.
[0034] The stepped shaft sleeve 2 has at least three ring sleeves 21 with different diameters, which are arranged in order according to the diameter size, and are connected as a whole through the conical sleeve 22 between the adjacent shaft sleeves. The end of the stepped shaft sleeve 2 with large diameter leans to the side support part 12, and the stepped shaft sleeve 2 is fixedly connected with the supporting shaft 13 through bonding or other ways. When used, for example, the stepped shaft sleeve 2 with three levels of outer diameter Φ200 / 250 / 300mm can be adopted, the inclination angle of each conical surface is 60°, and the high friction coefficient rubber lining (μ≥0.8) is matched, so that the adaptive diameter range is expanded to 200-350mm.
[0035] In order to match the stepped shaft sleeve 2, and also for the further positioning of the roll, a limiting shaft sleeve 4 is sleeved on the outer peripheral surface of the supporting shaft 13 at the end away from the side branch 12, the limiting shaft sleeve 4 is arranged opposite to the stepped shaft sleeve 2, and the structure of the limiting shaft sleeve 4 is the same as that of the stepped shaft sleeve 2. In order to facilitate the removal of the limiting shaft sleeve 4 when the roll is replaced, the end with large diameter of the limiting shaft sleeve 4 is fixedly connected with the extension rod 5, the limiting shaft sleeve 4 is forced by the extension rod 5, so that the limiting shaft sleeve 4 is conveniently removed, and the limiting shaft sleeve 4 is reinstalled after the plastic roll shaft is replaced. The limiting shaft sleeve 4 and the stepped shaft sleeve 2 limit the two ends of the plastic roll shaft respectively, so that the relative rotation between the plastic roll shaft and the supporting shaft 13 is avoided, and when the inner diameter of the plastic roll shaft is greater than the maximum diameter of the stepped shaft sleeve 2, the limiting mechanism 3 is used for limiting.
[0036] As shown in Figure 2 and Figure 3 , the limiting mechanism 3 comprises an arc block 31, a limiting protrusion 32 and an adjusting part 33. The end surface size of the arc block 31 is smaller than the size of the opening one of the side branch 12, so that the arc block 31 can pass through the opening one of the side branch 12, and the two ends of the arc block 31 are located on the two sides of the side branch 12 respectively, one end of which is close to the stepped shaft sleeve 2, and the limiting protrusion 32 is installed on the top of the end, and the end of the plastic roll shaft can be provided with a hole matched with the limiting protrusion 32.
[0037] The adjusting part 33 is used to adjust the radial distance between the arc block 31 and the stepped shaft sleeve 2, and since the adjusting part 33 and the arc block 31 are slidably arranged, the axial distance between the arc block 31 and the stepped shaft sleeve 2 is adjusted. The adjusting part 33 mainly comprises a fixed block 331, an adjusting bolt 332 and a sliding block 333, the middle section of the arc block 31 is provided with an opening two, the sliding block 333 is located in the opening two and is slidably connected with the arc block 31 through concave-convex matching, the middle part of the sliding block 333 is provided with a recess, the recess is embedded with a bearing, the inner side of the bearing is connected with the end of the adjusting bolt 332, the adjusting bolt 332 is screwed on the fixed block 331, and the fixed block 331 is installed on the side branch 12 and located on the periphery of the opening one. When the adjusting bolt 332 is rotated, the radial distance between the arc block 31 and the stepped shaft sleeve 2 can be adjusted by the sliding block 333, and the relative sliding between the sliding block 333 and the arc block 31 can satisfy the axial distance between the arc block 31 and the stepped shaft sleeve 2.
[0038] In actual use, the arc block 31 is first pushed away from the stepped shaft sleeve 2, the plastic roll shaft is limited by the stepped shaft sleeve 2 and the limiting shaft sleeve 4, and when the inner diameter of the plastic roll shaft is greater than the maximum diameter of the stepped shaft sleeve 2, the limiting mechanism 3 is used for limiting. The adjusting bolt 332 is rotated, the limiting protrusion 32 of the arc block 31 is flush with the stepped shaft sleeve 2, when the plastic roll shaft is sleeved on the supporting shaft 13, the arc block 31 is axially moved to move the limiting protrusion 32 to the hole of the plastic roll shaft, and then the adjusting bolt 332 is reversely rotated to make the limiting protrusion 32 located in the hole to realize the positioning of the plastic roll shaft.
[0039] The embodiment can ensure axial self-centering of different specifications of the roll by the different outer diameter sleeves of the stepped sleeve 2, has greater flexibility while overcoming the problem of relative rotation between the supporting shaft 13 and the roll pipe, and can use the limiting mechanism 3 to limit the roll when the specification of the roll is greater than the maximum outer diameter of the stepped sleeve 2, thereby increasing the limiting range of different specifications of the roll and avoiding relative rotation between the roll and the supporting shaft 13.
[0040] Embodiment 2
[0041] Please refer to Figure 4 The embodiment introduces a plastic roll fixing frame for plastic packaging bag production, which has basically the same structure as the plastic roll fixing frame for plastic packaging bag production introduced in embodiment 1. The difference lies in that the outer peripheral surface of one end of the supporting shaft 13 away from the side branch 12 is sleeved with a positioning sleeve 6 in the shape of a conical platform, the small-diameter end of the positioning sleeve 6 faces the stepped sleeve 2, and it should be noted that the diameter of the smallest end of the positioning sleeve 6 is the same as the diameter of the smallest end of the stepped sleeve 2. The positioning sleeve 6 and the stepped sleeve 2 cooperate with each other to realize positioning of the roll. In order to facilitate removal of the positioning sleeve 6, a support rod 7 is connected to the large-diameter end of the positioning sleeve 6, and the support rod 7 is located at the end of the positioning sleeve 6 away from the stepped sleeve 2, without affecting the limiting of the roll by the positioning sleeve 6.
[0042] The embodiment has the same beneficial effects as embodiment 1.
[0043] Embodiment 2
[0044] Please refer to Figure 5 The embodiment introduces a plastic roll fixing frame for plastic packaging bag production, which has basically the same structure as the plastic roll fixing frame for plastic packaging bag production introduced in embodiment 1. The difference lies in that the adjusting member 33 of the embodiment adopts a telescopic air cylinder 334 and a sliding block 333; the fixed end of the telescopic air cylinder 334 is installed on the side branch 12 and located at the periphery of the opening one of the side branch 12, the movable end faces the opening one of the side branch 12 and is connected with the sliding block 333, the middle segment of the arc-shaped block 31 is provided with an opening two, the sliding block 333 is located in the opening two and realizes sliding connection with the arc-shaped block 31 through concave-convex cooperation, and the sliding direction of the sliding block 333 is parallel to the axial direction of the supporting shaft 13.
[0045] The embodiment has the same beneficial effects as embodiment 1.
[0046] The technical scope of the utility model is not limited to the content in the above description, and those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical thought of the utility model, and these deformations and modifications should all belong to the protection scope of the utility model.
Claims
1. A plastic roll fixing frame for producing plastic packaging bags, characterized in that, It includes: The support (1) includes a bottom support (11), a side support (12) perpendicularly connected to the bottom support (11), and a support shaft (13) connected to the top bearing of the side support (12); the side support (12) has an opening, which is located on the periphery of the support shaft (13); The stepped bushing (2) includes multiple rings (21) with different outer diameters and a frustum sleeve (22) connecting adjacent rings (21). The multiple rings (21) are arranged linearly at equal intervals according to the outer diameter length from small to large. Adjacent rings (21) are connected as one unit by the frustum sleeve (22) and fixedly installed on the outer circumference of the support shaft (13). The end with the larger diameter is close to the side support (12). The limiting mechanism (3) is movably mounted on the side support (12), and the movable end passes through the opening of the side support (12) to limit a plastic reel with a diameter larger than that of the stepped bushing (2).
2. The plastic roll fixing frame for producing plastic packaging bags according to claim 1, characterized in that, The outer circumferential surface of the support shaft (13) away from the side support (12) is fitted with a limiting bushing (4) with the same structure as the stepped bushing (2), and the limiting bushing (4) is arranged opposite to the stepped bushing (2).
3. The plastic roll fixing frame for producing plastic packaging bags according to claim 2, characterized in that, An extension rod (5) is fixed to one end of the limiting bushing (4) away from the side support (12).
4. The plastic roll fixing frame for producing plastic packaging bags according to claim 1, characterized in that, A truncated cone-shaped positioning bushing (6) is fitted on the outer circumference of one end of the support shaft (13) away from the side support (12), with the smaller diameter end of the positioning bushing (6) facing the stepped bushing (2).
5. The plastic roll fixing frame for producing plastic packaging bags according to claim 4, characterized in that, A support rod (7) is fixed to one end of the positioning bushing (6) away from the side support (12).
6. The plastic roll fixing frame for producing plastic packaging bags according to claim 1, characterized in that, The limiting mechanism (3) includes an arc-shaped block (31), a limiting protrusion (32), and an adjusting member (33). The arc-shaped block (31) passes through the opening of the side support (12). The top of one end of the arc-shaped block (31) which is close to the stepped bushing (2) is fixedly connected to the limiting protrusion (32) that matches the end hole of the plastic roll. The other end is slidably connected to the adjusting member (33). The adjusting member (33) is installed on the side support (12) to adjust the radial distance between the arc-shaped block (31) and the stepped bushing (2).
7. The plastic roll fixing frame for producing plastic packaging bags according to claim 6, characterized in that, The adjusting component (33) includes a fixed block (331), an adjusting bolt (332), and a slider (333); the slider (333) is slidably disposed on the arc-shaped block (31), and the sliding direction of the slider (333) is parallel to the axial direction of the support shaft (13); the fixed block (331) is installed on the side support (12), located on the periphery of the first opening and maintaining a fixed distance; the adjusting bolt (332) is threadedly connected to the fixed block (331), and the end of the adjusting bolt (332) is movably connected to the slider (333).
8. The plastic roll fixing frame for producing plastic packaging bags according to claim 6, characterized in that, The adjusting component (33) includes a telescopic cylinder (334) and a slider (333); the fixed end of the telescopic cylinder (334) is installed on the side support (12) and is located outside the opening of the side support (12), and the movable end faces the opening of the side support (12) and is connected to the slider (333). The slider (333) is slidably arranged on the arc block (31), and the sliding direction of the slider (333) is parallel to the axial direction of the support shaft (13).
9. The plastic roll fixing frame for producing plastic packaging bags according to claim 1, characterized in that, A support structure (8) is installed on the top of the bottom support (11), and the support structure (8) is in contact with the end of the support shaft (13) away from the side support (12).
10. The plastic roll fixing frame for producing plastic packaging bags according to claim 9, characterized in that, The support structure (8) includes a lifting cylinder (81) and a support plate (82); the fixed end of the lifting cylinder (81) is connected to the bottom support (11), and the movable end faces upward and is connected to the support plate (82). The inner curvature of the support plate (82) matches the outer circumference of the support shaft (13).