A chain gripper guide for a film production apparatus

Abstract

The utility model discloses a kind of film production equipment chain tongs guiding device, to solve the problem that the posture of the front tongs body of existing chain tongs is swung due to running gap and affects film stretching quality. The device includes: chain tongs, upper guide roller assembly and lower guide roller assembly respectively installed on chain tongs, and upper guide rail and lower guide rail respectively installed on equipment rack and located in flat stretching rail area. When chain tongs runs to flat stretching rail area, upper guide roller assembly cooperates with upper guide rail, and lower guide roller assembly cooperates with lower guide rail, the posture of chain tongs front tongs body is constrained from two dimensions, effectively limit its swing. Through the technical scheme of the utility model, the stability of chain tongs operation can be significantly improved, the uniformity of film stretching is guaranteed, and then product quality and production efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of thin film production equipment technology, and in particular to a chain bar guide device for stabilizing the running posture of chain bars. Background Technology

[0002] In the film stretching process, the film is held by multiple chain clamps on both sides, and the chain clamps on both sides run at high speed on two specific tracks. By controlling the distance between the tracks on both sides to gradually increase at the process temperature, the film is stretched laterally.

[0003] To ensure the chain clamp can smoothly traverse complex tracks containing both straight and curved sections, a reasonable operating clearance must be designed between the moving parts of the chain clamp and the track. However, it is precisely because of this clearance that the front clamp body of the chain clamp, which holds the film, will experience a certain angle of free oscillation during operation. Especially when the chain clamp is running at high speed on the straight section for lateral stretching, this oscillation of the front clamp body becomes uncontrollable due to interference from various factors such as changes in friction, equipment vibration, and film tension fluctuations. This disordered and minute posture change disrupts the stability of the stretching process, leading to uneven tensile force on the film, easily causing uneven film thickness and localized stress concentration. Under high-speed stretching conditions, this can easily trigger film breakage.

[0004] Therefore, how to provide a device that can effectively suppress the swaying of the chain clip in the straight stretching section and ensure the stability of the stretching process has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0005] The purpose of this invention is to provide a chain clamp guiding device for thin film production equipment, which aims to solve the problem in the prior art where the front clamp body wobbles due to the gap in chain clamp operation, thereby affecting the film stretching quality and production stability.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A chain clamp guiding device for thin film production equipment, comprising: Chain clamps, used to hold films and run them on equipment tracks, include a swingable front clamp body; The upper guide roller assembly and the lower guide roller assembly are respectively mounted on the chain clamp; The upper guide rail and the lower guide rail are respectively installed on the frame of the film production equipment and are located in the straight track area of ​​the film stretching section; When the chain clip runs to the straight track area, the upper guide roller assembly cooperates with the upper guide track, and the lower guide roller assembly cooperates with the lower guide track to jointly limit the swing of the front clip body.

[0007] As can be seen, this utility model, by adding upper and lower guide roller assemblies to the chain clips and adding upper and lower guide rails at corresponding positions on the linear stretching section of the frame, utilizes the cooperation of rollers and rails to precisely constrain the posture of the chain clips from both upper and lower dimensions. This effectively eliminates the free swing of the front clip body caused by the running gap in the linear stretching section, ensuring that the running trajectory and posture of each chain clip remain highly consistent and stable. This significantly improves the uniformity of film thickness, reduces the risk of film breakage caused by uneven stress, and improves product quality and production stability.

[0008] Optionally, the position of the upper guide rail is adjustable, and / or the position of the lower guide rail is adjustable, to change the fit clearance between the guide roller assembly and the guide rail.

[0009] It is evident that by making the position of the guide rail adjustable, the fit clearance between the guide roller and the guide rail can be precisely controlled according to the actual wear conditions or process requirements, thereby suppressing chain clip oscillation to the maximum extent and ensuring the smooth passage of the chain clip, thus guaranteeing the accuracy and durability of the guiding effect.

[0010] Optionally, the fit clearance between the upper guide roller assembly and the upper guide rail is 0-0.5mm; and / or, the fit clearance between the lower guide roller assembly and the lower guide rail is 0-0.5mm.

[0011] It is evident that by controlling the clearance within a very small range, the free swing stroke of the front clip body can be eliminated to the maximum extent, ensuring the accuracy of guidance, while avoiding the problems of increased running resistance and accelerated wear that may be caused by interference fit, thus achieving a balance between stable guidance and low-resistance operation.

[0012] Optionally, it also includes an upper adjustment mechanism for adjusting the position of the upper guide rail; the upper guide rail includes an upper guide rail mounting plate adjustablely connected to the equipment frame; the upper adjustment mechanism includes: an upper guide rail adjusting weld block fixed to the equipment frame, and an adjusting bolt weld block welded to the upper guide rail mounting plate; the adjusting bolt weld block is provided with an insert bolt and a pull-out bolt; the insert bolt is threadedly engaged with the adjusting bolt weld block, and its end abuts against the upper guide rail adjusting weld block; the pull-out bolt passes through a through hole on the adjusting bolt weld block and is screwed into a threaded hole on the upper guide rail adjusting weld block.

[0013] It is evident that this upper adjustment mechanism utilizes the ingenious principle of reaction force, through the synergistic action of the push-in bolt and pull-out bolt, to achieve precise two-way fine-tuning of the upper guide rail position. The structure is ingenious and reliable, and the operation is very convenient.

[0014] Optionally, it further includes a lower adjustment mechanism for adjusting the position of the lower guide rail; the lower adjustment mechanism includes: a lower guide rail adjustment welding plate fixed to the equipment frame, and an adjustment bolt that engages with a threaded hole on the lower guide rail adjustment welding plate; the end of the adjustment bolt abuts against the lower guide rail for pushing the lower guide rail closer to the equipment frame; the lower adjustment mechanism further includes an ejector bolt disposed on the lower guide rail, the ejector bolt for pushing the lower guide rail away from the equipment frame.

[0015] As can be seen, the lower adjustment mechanism also achieves precise bidirectional fine-tuning of the lower guide rail through bolts in two directions, ensuring the reliability and convenience of adjusting the lower guide gap. Optionally, the upper guide roller assembly includes an upper guide roller mounting plate, an upper guide roller shaft, and an upper guide roller. The upper guide roller mounting plate is mounted to the chain clip, and the upper guide roller is rotatably connected to the upper guide roller mounting plate via the upper guide roller shaft.

[0016] Optionally, the upper guide roller assembly includes an upper guide roller mounting plate, an upper guide roller shaft, and an upper guide roller. The upper guide roller mounting plate is mounted to the chain clip, and the upper guide roller is rotatably connected to the upper guide roller mounting plate via the upper guide roller shaft.

[0017] It is evident that this structure is a mature design, easy to install and maintain, and can ensure that the upper guide roller rotates reliably and flexibly.

[0018] Optionally, the lower guide roller assembly includes a lower guide roller mounting plate, a lower guide roller shaft, and a lower guide roller, with the lower guide roller rotatably connected to the lower guide roller mounting plate via the lower guide roller shaft.

[0019] It is evident that this structure also possesses the advantages of mature design and convenient installation and maintenance, ensuring the reliable operation of the lower guide roller.

[0020] Optionally, the upper guide rail includes an upper guide rail strip, and the upper guide rollers of the upper guide roller assembly roll along the side of the upper guide rail strip.

[0021] It is evident that by making rolling contact between the roller and the side of the track, sliding friction is transformed into rolling friction, which reduces running resistance and lowers energy consumption and wear.

[0022] Optionally, the lower guide rail includes a lower guide rail strip, and the lower guide rollers of the lower guide roller assembly roll along the side of the lower guide rail strip.

[0023] It is evident that the rolling contact method also ensures low resistance and long service life of the lower guide mechanism.

[0024] Optionally, the upper guide rail and / or the lower guide rail are provided with flared guide portions at both ends.

[0025] It is evident that by setting flared guide sections at both ends of the track, the guide rollers can smoothly and steadily enter and exit the guide section, avoiding impact and jamming, and further improving the stability of equipment operation. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0027] Figure 1 This is a schematic diagram of the overall structure of a chain clip guiding device provided in an embodiment of this utility model; Figure 2 This is a cross-sectional view and a partially enlarged schematic diagram of the chain clip portion in an embodiment of this utility model; Figure 3 This is a partially enlarged schematic diagram of the adjustment mechanism in an embodiment of this utility model; Figure 4 This is a schematic diagram of the upper guide rail assembly in an embodiment of this utility model; Figure 5 This is a schematic diagram of the lower guide rail assembly in an embodiment of this utility model; Figure 6 This is a schematic diagram of the upper guide roller assembly in an embodiment of this utility model; Figure 7 This is a structural schematic diagram of the lower guide roller assembly in an embodiment of this utility model.

[0028] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Chain clamp; 3. Upper guide rail; 301. Upper guide rail mounting plate; 302. Upper guide rail adjusting block; 303. Upper guide rail mounting plate; 304. Upper guide rail strip; 305. Upper guide rail connecting block; 306. Adjusting bolt welding block; 307. Push-in bolt; 308. Pull-out bolt; 4. Lower guide rail; 401. Lower guide rail mounting plate; 402. Lower guide rail strip; 403. Lower guide rail connecting block 404. Ejector bolt; 501. Lower guide rail adjusting welding plate; 502. Adjusting bolt; 6. Upper guide roller assembly; 601. Upper guide roller mounting plate; 602. Upper guide roller shaft; 603. Upper guide roller bushing; 604. Upper guide roller; 605. Shaft retaining ring; 7. Lower guide roller assembly; 701. Lower guide roller mounting plate; 702. Lower guide roller shaft; 703. Lower guide roller bushing; 704. Lower guide roller; 705. Round nut. Detailed Implementation

[0029] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0030] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0031] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0032] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0034] This invention provides an innovative chain clamp guiding device for thin film production equipment. Its core concept lies in adding guide rollers to the existing chain clamp body and a matching adjustable guide rail to the linear tension section of the equipment frame. When the chain clamp travels to this section, the guide rollers and guide rail cooperate to form a stable guiding system, thereby actively and precisely controlling the chain clamp's running posture and eliminating undesirable swaying of the front clamp body.

[0035] Please see Figures 1 to 4 The overall structure of this embodiment is shown. The device is applied to a film production equipment, which has a frame 1. A film production line typically includes a preheating zone, a stretching zone, a shaping zone, and a cooling zone. The straight stretching track zone described in this embodiment is the main working section of the stretching zone. In this section, the main tracks on both sides used to guide the chain clamps 2 are designed as two parallel straight lines, and the distance between the two straight lines gradually increases along the direction of film movement, thereby achieving lateral stretching of the film. Multiple chain clamps 2 are used to clamp the film and run along the main tracks (not shown) laid on the frame 1. Each chain clamp 2 is equipped with an upper guide roller assembly 6 and a lower guide roller assembly 7. Correspondingly, in a specific section of the frame 1 (i.e., the straight stretching section of the film), an upper guide track 3 and a lower guide track 4 are installed. When the chain clamp 2 enters this section, as... Figure 2 As shown in the enlarged view I, the upper guide roller 604 on the upper guide roller assembly 6 interacts with the upper guide rail strip 304 of the upper guide rail 3; simultaneously, as Figure 2As shown in the enlarged view II, the lower guide roller 704 on the lower guide roller assembly 7 interacts with the lower guide rail 402 of the lower guide rail 4. Through the constraints in both the upper and lower directions, the front clamping body of the chain clamp 2 is firmly restricted on the preset trajectory, preventing swaying and thus ensuring smooth operation.

[0036] Please see Figure 6 and Figure 7 The upper guide roller assembly 6 includes an upper guide roller mounting plate 601, which is fixed to the body of the chain clip 2 by bolts or the like. The upper guide roller 604 is rotatably mounted on the upper guide roller mounting plate 601 via an upper guide roller shaft 602, an upper guide roller bushing 603, and a shaft retaining ring 605. Similarly, the lower guide roller assembly 7 includes a lower guide roller mounting plate 701, which is fixed to the body of the chain clip 2. The lower guide roller 704 is rotatably mounted on the lower guide roller mounting plate 701 via a lower guide roller shaft 702, a lower guide roller bushing 703, and a round nut 705.

[0037] Please see Figure 3 and Figure 4The upper guide rail 3 mainly consists of an upper guide rail mounting plate 303 adjustablely connected to the frame 1 and an upper guide rail strip 304 mounted on the mounting plate 303, wherein the upper guide rail strip 304 provides a rolling track surface for the upper guide roller 604. To achieve precise adjustment of the position of the upper guide rail 3, this embodiment includes an upper adjustment mechanism. Specifically, the upper guide rail mounting plate 301 and the upper guide rail adjusting block 302 are both welded and fixed to the frame 1 as adjustment references. The adjusting bolt welding block 306 is welded to the movable upper guide rail mounting plate 303. The upper guide rail mounting plate 303 is bolted to the upper guide rail mounting plate 301 through mounting holes with elongated slots, allowing for slight translation during adjustment. The adjustment action is achieved collaboratively by the push-in bolt 307 and the pull-out bolt 308. The insert bolt 307 engages with the threaded hole on the adjusting bolt welding block 306, with its end abutting against the fixed upper guide rail adjusting welding block 302. When the insert bolt 307 is tightened, its shank, before entering the threaded hole of the adjusting bolt welding block 306, generates a thrust on the upper guide rail adjusting welding block 302. According to the principle of reaction force, the adjusting bolt welding block 306 will move the upper guide rail mounting plate 303 away from the upper guide rail adjusting welding block 302. The pull-out bolt 308 passes through the through hole on the adjusting bolt welding block 306 and is screwed into the threaded hole on the upper guide rail adjusting welding block 302. When the pull-out bolt 308 is tightened, its head will pull the adjusting bolt welding block 306, thereby moving the upper guide rail mounting plate 303 closer to the upper guide rail adjusting welding block 302. By coordinating the operation of these two bolts, bidirectional precise fine-tuning of the position of the upper guide rail mounting plate 303 can be achieved. After adjustment, the mounting bolts are tightened. Multiple guide rails can be connected by the upper guide rail connecting block 305.

[0038] Please see Figure 3 and Figure 5The lower guide rail 4 mainly consists of a lower guide rail mounting plate 401 and a lower guide rail strip 402 mounted on it. Similar to the upper guide rail, the position of the lower guide rail 4 can also be finely adjusted in both directions. Its adjustment function is mainly achieved through a lower adjustment mechanism. Specifically, the lower guide rail adjustment plate 501 is welded and fixed to the frame 1. During adjustment, first loosen the mounting bolts that fix the lower guide rail strip 402 to the lower guide rail mounting plate 401. The ejector bolt 404 provided on the lower guide rail strip 402 has its end abutting against a certain fixed surface of the frame 1. Tightening the ejector bolt 404 can push the lower guide rail 4 away from the fixed surface. At the same time, the adjustment bolt 502 passes through the threaded hole on the lower guide rail adjustment plate 501, and its end abuts against the side of the lower guide rail strip 402. Tightening the adjustment bolt 502 can push the lower guide rail 4 towards the fixed surface. By coordinating the ejection bolt 404 and adjusting bolt 502, precise bidirectional fine-tuning of the position of the lower guide rail 4 can be achieved. After adjustment, tightening the mounting bolts will secure it. Multiple guide rail sections can be connected by the lower guide rail connecting block 403 to form a complete guide section.

[0039] To ensure that the upper and lower guide rollers can smoothly enter and leave the guide section, the inlet and outlet ends of the upper guide rail 304 and the lower guide rail 402 are both machined with flared guide parts. These guide parts can smoothly guide the rollers and avoid impact.

[0040] During operation, the chain clamp 2, equipped with the upper guide roller assembly 6 and the lower guide roller assembly 7, runs on the main track. Upon entering the straight-line stretching section, the upper guide roller 604 begins to contact the side of the upper guide rail 304 and rolls along it, while the lower guide roller 704 simultaneously contacts the side of the lower guide rail 402 and rolls along it. Since the positions of the upper guide rail 304 and the lower guide rail 402 can be precisely set by the adjustment mechanism, the gap between the rollers and the sides of the rails can be precisely controlled within the range of 0-0.5mm. In this embodiment, it is preferable to control this gap within 0-0.1mm. Thus, any lateral swing tendency of the front clamp body of the chain clamp 2 is prevented by the guide rails from both the upper and lower directions, thereby achieving a high degree of stability in the chain clamp's running posture. This minute gap not only maximizes the limitation of the front clamp body's swing but also avoids the additional frictional resistance caused by the interference fit, ensuring smooth passage of the chain clamp.

[0041] In summary, this utility model successfully solves the technical problem of the chain clamp's posture swaying due to gaps in the linear stretching section by adding a cooperating roller guide mechanism to the chain clamp and the equipment frame, and designing a convenient position fine-tuning function. This effectively ensures the uniformity and stability of the film stretching process, ultimately achieving the goals of improving product quality, reducing breakage downtime, and increasing production efficiency, and has high industrial practical value.

[0042] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A chain clamp guiding device for thin film production equipment, characterized in that, include: A chain clamp for holding a film and running it on a device track, the chain clamp including a swingable front clamp body; The upper guide roller assembly and the lower guide roller assembly are respectively mounted on the chain clamp; The upper guide rail and the lower guide rail are respectively installed on the frame of the film production equipment and are located in the straight track area of ​​the film stretching section; When the chain clip runs to the straight track area, the upper guide roller assembly cooperates with the upper guide track, and the lower guide roller assembly cooperates with the lower guide track to jointly limit the swing of the front clip body.

2. The chain clamp guiding device according to claim 1, characterized in that, The position of the upper guide rail is adjustable, and / or the position of the lower guide rail is adjustable, to change the fit clearance between the upper guide roller assembly and the upper guide rail, and the fit clearance between the lower guide roller assembly and the lower guide rail.

3. The chain clamp guiding device according to claim 2, characterized in that, The clearance between the upper guide roller assembly and the upper guide rail is 0-0.5mm; and / or, the clearance between the lower guide roller assembly and the lower guide rail is 0-0.5mm.

4. The chain clamp guiding device according to claim 2, characterized in that, It also includes an upper adjustment mechanism for adjusting the position of the upper guide rail; the upper guide rail includes an upper guide rail mounting plate adjustablely connected to the frame; the upper adjustment mechanism includes: Adjustable welding block for the upper guide rail fixed to the frame; Adjusting bolt welding block welded to the upper guide rail mounting plate; The adjusting bolt welding block is equipped with an insert bolt and a pull-out bolt; The insertion bolt is threadedly engaged with the adjusting bolt welding block, and its end abuts against the upper guide rail adjusting welding block. The pull-out bolt passes through the through hole on the adjusting bolt welding block and is screwed into the threaded hole on the upper guide rail adjusting welding block.

5. The chain clamp guiding device according to claim 2, characterized in that, It also includes a lower adjustment mechanism for adjusting the position of the lower guide rail; the lower adjustment mechanism includes: The lower guide rail adjustment welding plate is fixedly attached to the frame; Ejector bolts are provided on the lower guide rail; And the adjusting bolts that pass through the adjusting welding plate of the lower guide rail; The ejector bolt is used to push the lower guide rail away from the frame, and the adjusting bolt is used to push the lower guide rail closer to the frame.

6. The chain clamp guiding device according to claim 1, characterized in that, The upper guide roller assembly includes an upper guide roller mounting plate, an upper guide roller shaft, and an upper guide roller. The upper guide roller mounting plate is mounted to the chain clip, and the upper guide roller is rotatably connected to the upper guide roller mounting plate via the upper guide roller shaft.

7. The chain clamp guiding device according to claim 1, characterized in that, The lower guide roller assembly includes a lower guide roller mounting plate, a lower guide roller shaft, and a lower guide roller. The lower guide roller is rotatably connected to the lower guide roller mounting plate via the lower guide roller shaft.

8. The chain clamp guiding device according to claim 1, characterized in that, The upper guide rail includes an upper guide rail strip, and the upper guide roller of the upper guide roller assembly rolls along the side of the upper guide rail strip.

9. The chain clamp guiding device according to claim 8, characterized in that, The lower guide rail includes a lower guide rail strip, and the lower guide roller of the lower guide roller assembly rolls along the side of the lower guide rail strip.

10. The chain clamp guiding device according to claim 9, characterized in that, The upper guide rail and / or the lower guide rail are provided with flared guide portions at both ends.

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