A slitting blade assembly for a label slitting machine

Abstract

This utility model relates to the technical field of slitting machine equipment, and provides a slitting blade assembly for a label slitting machine, which solves the problem of the set screw scratching the lower blade shaft during frequent adjustment of the limiting sleeve. The slitting blade assembly of this label slitting machine includes a lower slitting blade assembly, in which the lower slitting blade and the limiting sleeve are fitted and fixed outside the lower blade shaft. The limiting sleeve comprises a metal inner sleeve, a plastic outer sleeve, and a locking ring. The metal inner sleeve is fitted and fixed outside the lower blade shaft, while the plastic outer sleeve and the locking ring are fitted outside the metal inner sleeve and threadedly connected to it. The locking ring presses against the plastic outer sleeve.

Description

Technical Field

[0001] This utility model relates to the field of slitting machine equipment technology, specifically to a slitting blade assembly for a label slitting machine. Background Technology

[0002] When label substrates, such as PET film, are slit using a label slitting machine, the process differs from slitting non-woven fabrics. Due to the smooth surface of the film material, the edges of the slit film are prone to unevenness. To address this, we install a nylon limiting sleeve next to the lower slitting blade to limit the upper slitting blade and improve its stability during the slitting process. However, the nylon limiting sleeve is prone to wear and requires periodic adjustment. The nylon limiting sleeve is fixed to the lower blade shaft by a set of surrounding top screws, and frequent adjustments can easily scratch the lower blade shaft.

[0003] Therefore, we propose a slitting blade assembly for a label slitting machine. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a slitting blade assembly for a label slitting machine, thereby solving the aforementioned problems in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A slitting blade assembly for a label slitting machine includes a slitting lower blade assembly. The slitting lower blade and a limiting sleeve of the slitting lower blade assembly are sleeved and fixed outside the lower blade shaft. The limiting sleeve includes a metal inner sleeve, a plastic outer sleeve, and a locking ring. The metal inner sleeve is sleeved and fixed outside the lower blade shaft. The plastic outer sleeve and the locking ring are sleeved outside the metal inner sleeve and threadedly connected to the metal inner sleeve. The locking ring presses against the plastic outer sleeve.

[0007] Furthermore, the inner wall of the metal sleeve is formed with an elastic metal sheet, and a set screw is threaded onto the metal sleeve. The set screw presses the elastic metal sheet inward, causing the elastic metal sheet to bend inward and cooperate with the inner wall of the metal sleeve to hold the lower cutter shaft tightly.

[0008] Furthermore, the end of the metal inner sleeve opposite to the cutting blade has a radially outwardly protruding limiting flange.

[0009] Furthermore, the plastic cover is a nylon cover.

[0010] Furthermore, the slitting blade assembly includes a slitting upper blade assembly, which includes an upper reference sleeve, an adjusting sleeve, a slitting upper blade, a limiting ring, a tension spring, and a retaining ring. The upper reference sleeve is fitted and fixed outside the upper blade shaft. The adjusting sleeve is fitted outside the upper reference sleeve and threadedly connected to it. The slitting upper blade, the limiting ring, and the retaining ring are fitted outside the adjusting sleeve and abut against the limiting step. The left end face of the slitting upper blade abuts against the limiting step of the adjusting sleeve, and the right end face of the limiting ring abuts against the retaining ring. The limiting ring has a chamfer on the side facing the slitting upper blade, and a tension spring is fitted in the groove formed by the chamfer and the slitting upper blade.

[0011] This utility model provides a slitting blade assembly for a label slitting machine, which has the following advantages: the slitting blade assembly adopts a combination structure of a metal inner sleeve, a plastic outer sleeve, and a locking ring. The metal inner sleeve acts as an isolation part and a connecting part between the plastic outer sleeve and the lower blade shaft. The plastic outer sleeve and the metal inner sleeve are threadedly connected. Rotating the plastic outer sleeve can realize its lateral movement adjustment along the lower blade shaft axis. There is no need to tighten the set screw during lateral movement adjustment, avoiding the problem of scratching the lower blade shaft. At the same time, the locking ring tightens the plastic outer sleeve, which can reduce the thread clearance of the plastic outer sleeve and improve the adjustment accuracy. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0014] Figure 3 for Figure 2 A magnified view of part A in the middle;

[0015] Figure 4 This is an exploded structural diagram of the slitting blade assembly of this utility model;

[0016] Figure 5 for Figure 4 A magnified view of section B in the middle.

[0017] In the picture:

[0018] 11. Lower cutter shaft;

[0019] 12. Cut into sections;

[0020] 13. Plastic cover;

[0021] 131. Waist-shaped hole;

[0022] 14. Locking ring;

[0023] 15. Metal inner sleeve;

[0024] 151. Threaded hole;

[0025] 152. Elastic metal sheet;

[0026] 16. Set screw;

[0027] 21. Install the tool shaft;

[0028] 22. Cut the blade into sections;

[0029] 23. Tension spring;

[0030] 24. Limiting ring;

[0031] 25. Reference sleeve;

[0032] 26. Adjusting sleeve;

[0033] 261. Snap ring mounting slot. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] See attached document Figure 1-5 A slitting blade assembly for a label slitting machine, comprising an upper slitting blade assembly 22 and a lower slitting blade assembly 12;

[0036] The slitting upper blade 22 assembly includes an upper reference sleeve 25, an adjusting sleeve 26, a slitting upper blade 22, a limiting ring 24, a tension spring 23, and a retaining ring. The upper reference sleeve 25 is fitted and fixed to the upper blade shaft 21. The adjusting sleeve 26 is fitted to the upper reference sleeve 25 and threadedly connected to it. The slitting upper blade 22, the limiting ring 24, and the retaining ring are fitted to the adjusting sleeve 26 and abut against the limiting step. The left end face of the slitting upper blade 22 abuts against the limiting step of the adjusting sleeve 26, and the right end face of the limiting ring 24 abuts against the retaining ring (only the retaining ring mounting groove 261 for mounting the retaining ring is shown in the figure). The limiting ring 24 has a chamfer on the side facing the slitting blade 22. A tension spring 23 is fitted in the groove formed by the chamfer and the slitting blade 22 (after bending the tension spring 23, the hooks at both ends hook each other to form a ring structure). The tension spring 23 is tightened in the groove, and the slitting blade 22 is pressed against the limiting step of the adjusting sleeve 26. The slitting blade 22 assembly adopts a snap-spring installation structure. By loosening the snap-spring, the limiting ring 24 and the tension spring 23 can be removed, which can achieve quick replacement. However, the stability is slightly inferior to the cover plate installation structure, which will cause the edge lines of the slitting film to be uneven as mentioned in the background art.

[0037] The slitting lower blade 12 assembly includes a slitting lower blade 12 and a limiting sleeve, which are fitted and fixed outside the lower blade shaft 11. The limiting sleeve is located on the side of the upper slitting blade 22 away from the slitting lower blade 12, limiting the cutting edge of the upper slitting blade 22 and improving its stability. The slitting lower blade 12 adopts a mounting structure with a set screw 16 for tightening. The limiting sleeve includes a metal inner sleeve 15, a plastic outer sleeve 13, and a locking ring 14. The metal inner sleeve 15 is fitted and fixed outside the lower blade shaft 11. The plastic outer sleeve 13 is a nylon outer sleeve. The plastic outer sleeve 13 and the locking ring 14 are fitted outside the metal inner sleeve 15 and threadedly connected to the metal inner sleeve 15 (i.e., the inner sidewall of the plastic outer sleeve 13 and the locking ring 14 is machined with internal threads, and the outer sidewall of the metal inner sleeve 15 is machined with external threads). The locking ring 14 tightens the plastic outer sleeve 13.

[0038] In this embodiment, an elastic metal sheet 152 is formed on the inner wall of the metal inner sleeve 15, and a set screw 16 is connected in the threaded hole 151 of the metal inner sleeve 15. The set screw 16 presses the elastic metal sheet 152 inward, so that the elastic metal sheet 152 bends inward and cooperates with the inner wall of the metal inner sleeve 15 to hold the lower cutter shaft 11. This structure can further prevent the set screw 16 from contacting the lower cutter shaft 11.

[0039] In this embodiment, the metal inner sleeve 15 has a radially protruding limiting flange at one end away from the cutting blade 12 to prevent the locking sleeve from coming out. The plastic outer sleeve 13 has an oblong hole 131 extending along the parallel axis, so that the threaded hole 151 can fall into the oblong hole 131 with less than one turn of the plastic sleeve, making it easy for the set screw 16 to be unscrewed.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0041] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A slitting knife assembly of a label slitting machine, comprising a lower slitting knife assembly, a lower slitting knife and a limiting sleeve of the lower slitting knife assembly being sleeved and fixed outside a lower knife shaft, characterized in that: The limiting sleeve includes a metal inner sleeve, a plastic outer sleeve, and a locking ring. The metal inner sleeve is fitted and fixed outside the lower cutter shaft. The plastic outer sleeve and the locking ring are fitted outside the metal inner sleeve and threadedly connected to the metal inner sleeve. The locking ring presses against the plastic outer sleeve.

2. The slitting blade assembly of a label slitter as claimed in claim 1, wherein: The inner wall of the metal sleeve is formed with an elastic metal sheet, and a set screw is threaded onto the metal sleeve. The set screw presses the elastic metal sheet inward, causing the elastic metal sheet to bend inward and cooperate with the inner wall of the metal sleeve to hold the lower cutter shaft tightly.

3. A slitting blade assembly for a label slitter as defined in claim 2, wherein: The metal inner sleeve has a radially outwardly convex limiting flange at one end opposite to the cutting blade.

4. The slitting knife assembly of claim 1 wherein: The plastic cover is made of nylon.

5. The slitting knife assembly of claim 1 wherein: The slitting blade assembly includes a slitting upper blade assembly, which includes an upper reference sleeve, an adjusting sleeve, a slitting upper blade, a limiting ring, a tension spring, and a retaining ring. The upper reference sleeve is fitted and fixed outside the upper blade shaft. The adjusting sleeve is fitted outside the upper reference sleeve and threadedly connected to it. The slitting upper blade, the limiting ring, and the retaining ring are fitted outside the adjusting sleeve and abut against the limiting step. The left end face of the slitting upper blade abuts against the limiting step of the adjusting sleeve, and the right end face of the limiting ring abuts against the retaining ring. The limiting ring has a chamfer on the side facing the slitting upper blade, and a tension spring is fitted in the groove formed by the chamfer and the slitting upper blade.

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