Slitting circular cutter shaft assembly and slitting equipment for food packaging film

Abstract

The utility model relates to a slitting circular cutter shaft assembly. The device comprises a plurality of brackets and a shaft assembly, wherein shaft sleeves and bearings are arranged on the brackets; the shaft assembly comprises an end positioning shaft, a positioning shaft and a circular knife fixing shaft, the circular knife fixing shaft comprises a main shaft and an inserting shaft, and the main shaft is further sleeved with a circular knife and two blade positioning rings; the positioning shaft comprises a fixed section and a coupling section, the coupling section is sleeved with a sliding sleeve and a positioning sleeve, an inserting groove is further formed in the outer end of the coupling section, and the inserting shaft can be matched with the inserting groove in an inserting mode; the end positioning shaft comprises a fixed section, a coupling section and a transmission section. Any section of the circular knife fixing shaft can be taken down at any time, so that the corresponding circular knife is independently replaced, the effect of simply and efficiently replacing the circular knife is achieved, and the time required for replacing the circular knife is shortened.

Description

Technical Field

[0001] The utility model relates to a slitting device, in particular to a slitting circular knife shaft component and a slitting device for food packaging films. Background Art

[0002] During the production process, food packaging film undergoes a slitting process, which is used to cut the film into fixed widths for delivery. This slitting process requires slitting equipment. Existing slitting equipment generally uses circular knives and a lower blade shaft to achieve this. The circular knives are fixed to an upper blade shaft and are spaced evenly apart. The combination of the circular knives and the lower blade shaft cuts the film, and the lower and upper blade shafts rotate in opposite directions, driven by a transmission system.

[0003] During the slitting process, different circular knives operate under different conditions and experience varying degrees of wear. However, because current circular knives are all fixed to the same upper blade shaft, replacing the middle blade requires removing all the other blades on the same side. This makes blade replacement time-consuming and impacts production efficiency. Summary of the Invention

[0004] The utility model provides a slitting circular knife shaft assembly and a slitting device for food packaging film, which solves the problem in the prior art that the blade replacement process is very complicated and time-consuming.

[0005] The above-mentioned technical problems of the present invention are mainly solved by the following technical solutions: a slitting circular knife shaft assembly, comprising a plurality of brackets and a shaft assembly, wherein the bracket is provided with a shaft sleeve and a bearing fixed in the shaft sleeve; the shaft assembly comprises two end positioning shafts located at both ends, a plurality of positioning shafts and a plurality of circular knife fixing shafts, the end positioning shafts and the positioning shafts are fixedly plugged into the bearings in the shaft sleeve and are coaxially arranged with each other, the circular knife fixing shaft comprises a main shaft and a plug-in shaft coaxially arranged at both ends of the main shaft, a first thread is provided on the circumferential side wall of the main shaft, a circular knife and two blade positioning rings clamped and fixed on both sides of the circular knife are also sleeved on the main shaft, and the blade positioning ring is screwed on the first thread; the positioning shaft comprises a fixed section fixed to the bearing and a coaxial section located therebetween The coupling sections on both sides are provided with a second thread and a plurality of sliding grooves distributed in a circumferential array on the circumferential outer wall of the coupling sections, the coupling sections are provided with a sliding sleeve and a positioning sleeve, the sliding sleeve is provided with a plurality of guide blocks adapted to the sliding groove, the positioning sleeve is screwed onto the second thread, the outer end of the coupling section is also provided with a plug-in groove, and the plug-in shaft can be plugged into and matched with the plug-in groove, when the sliding sleeve is constrained by the positioning sleeve to move toward the side of the circular knife fixed shaft, the guide block will abut against the circumferential outer wall of the plug-in shaft, and the positioning sleeve can push the sliding sleeve to abut against the main shaft; the end positioning shaft includes a fixed section, a coupling section and a transmission section, and the transmission section is relatively located at the outer end of the shaft assembly, and the fixed section and coupling section on the end positioning shaft have the same structure as the fixed section and coupling section on the positioning shaft.

[0006] The locating sleeve on the coupling section can be adjusted by rotating forward and backward, thereby controlling the position of the sliding sleeve. When the sliding sleeve is completely clear of the insertion slot, the insertion slot is fully exposed, and the insertion shaft on the circular blade fixed shaft can be freely inserted into or removed from the insertion slot. When the two insertion shafts on the circular blade fixed shaft are engaged with the insertion slots on both sides, the locating sleeves on both sides are adjusted to push the two sliding sleeves toward the circular blade fixed shaft until the two sliding sleeves abut against the ends of the main shaft. At this point, the main shaft and the coupling section are completely coaxial and connected to each other. This method can achieve a coaxial fixed connection between the two end locating shafts, multiple locating shafts, and multiple circular blade fixed shafts. Then, by applying a rotation effect to the transmission section, all circular blades can rotate coaxially and synchronously. With this solution, any section of the circular blade fixed shaft can be removed at any time to replace the corresponding circular blade separately. The circular blade can be removed by loosening one of the blade locating rings. At the same time, the length of the plug-in slot on the utility model is slightly longer than the length of the plug-in shaft, so the position of the circular knife can be fine-tuned by rotating the positioning sleeves on both sides of the circular knife fixed shaft, thereby achieving fine-tuning of the circular knife position.

[0007] Furthermore, a limiting section with an increased outer diameter is provided in the middle of the fixing section, and two bearings are fixed in the sleeve and clamped on both sides of the limiting section. The utility model clamps the limiting spindle by two bearings, thereby ensuring the axial fixation of the shaft assembly relative to the bracket.

[0008] Furthermore, the bracket includes a prismatic shaft. The bracket is provided with a fixing sleeve that is fixedly engaged with the prismatic shaft. The fixing sleeve is screwed onto a tension bolt that abuts the prismatic shaft. The prismatic shaft not only secures the bracket but also allows for adjustable spacing between the brackets to accommodate slitting spacing adjustments for different product lines.

[0009] A food packaging film slitting device includes a frame, a transmission assembly, a lower blade shaft, and a blade shaft assembly. The blade shaft assembly is characterized in that the blade shaft assembly is the aforementioned circular slitting blade shaft assembly, and the circular blade on the circular slitting blade shaft assembly abuts against the lower blade shaft. Because the aforementioned circular slitting blade shaft assembly has the aforementioned technical effects, a slitting device equipped with the circular slitting blade shaft assembly also has the same technical effects.

[0010] Therefore, compared with the prior art, the present invention has the following characteristics: 1. The present invention can remove any section of the circular knife fixing shaft at any time, so as to replace the corresponding circular knife separately, thus having the effect of simply and efficiently replacing the circular knife, which is beneficial to reducing the time required for replacing the circular knife; 2. The position of the positioning sleeves on both sides of the circular knife fixing shaft can be fine-tuned by rotating, thereby achieving fine-tuning of the circular knife position. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Attachment Figure 1 This is a schematic diagram of a structure of the present invention, in which the sliding sleeve partially covers the plug-in shaft but does not abut against the main shaft;

[0012] Attachment Figure 2 It is attached Figure 1 A magnified view of part A;

[0013] Attachment Figure 3 This is a schematic diagram of the structure of the utility model when the sliding sleeve abuts against the main shaft;

[0014] Attachment Figure 4 It is attached Figure 1 BB cross-sectional view. DETAILED DESCRIPTION

[0015] The technical solution of the present invention will be further specifically described below with reference to embodiments and in conjunction with the accompanying drawings.

[0016] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0017] Example 1: See Figure 1 、 Figure 2 and Figure 3 A slitting circular knife shaft assembly includes four brackets 100 and a shaft assembly 200. The bracket is provided with a sleeve 110 and a bearing 120 fixed in the sleeve; the shaft assembly includes two end positioning shafts 300 at both ends, two positioning shafts 400 and three circular knife fixed shafts 500. The end positioning shafts and the positioning shafts are fixedly plugged into the bearings in the sleeve and are coaxially arranged with each other. The circular knife fixed shaft includes a main shaft 510 and a plug-in shaft 520 coaxially arranged at both ends of the main shaft. The circumferential side wall of the main shaft A first thread is provided on the main shaft, and a circular knife 530 and two blade positioning rings 540 clamped and fixed on both sides of the circular knife are also provided on the main shaft. The blade positioning rings are screwed on the first thread; the positioning shaft includes a fixed section 410 fixed to the bearing and a coupling section 420 coaxially located on both sides thereof. A second thread and a plurality of circumferential arrayed sliding grooves 430 are provided on the circumferential outer wall of the coupling section. A sliding sleeve 440 and a positioning sleeve 450 are provided on the coupling section. The sliding sleeve is provided with a plurality of guide blocks 441 adapted to the sliding grooves (see Figure 4 ), the positioning sleeve is screwed onto the second thread, and the outer end of the coupling section is also provided with a plug-in groove 460, and the plug-in shaft can be plugged into the plug-in groove. When the sliding sleeve is constrained by the positioning sleeve to move toward the side of the circular knife fixed shaft, the guide block will abut against the circumferential outer wall of the plug-in shaft, and the positioning sleeve can push the sliding sleeve to abut against the main shaft; the end positioning shaft includes a fixed section, a coupling section and a transmission section 310, and the transmission section is relatively located at the outer end of the shaft assembly. The transmission section is used to form a transmission connection with the transmission system, and the fixed section and coupling section on the end positioning shaft have the same structure as the fixed section and coupling section on the positioning shaft.

[0018] The locating sleeve on the coupling section can be adjusted by rotating forward and backward, thereby controlling the position of the sliding sleeve. When the sliding sleeve is completely clear of the slot, the slot is fully exposed, and the splice shaft on the circular blade fixed shaft can be freely inserted into or removed from the slot. When the two splice shafts on the circular blade fixed shaft mate with the slots on both sides, the locating sleeves on both sides are adjusted to push the two sleeves toward the circular blade fixed shaft and clamp them until the two sleeves abut against the two ends of the main shaft. At this point, the main shaft and the coupling section are completely coaxial and connected to each other through a transmission. This method can achieve a coaxial fixed connection between the two end locating shafts, multiple locating shafts, and multiple circular blade fixed shafts. Then, by applying a rotational effect to the transmission section, all circular blades can rotate coaxially and synchronously. With this solution, any section of the circular blade fixed shaft can be removed at any time to replace the corresponding circular blade separately. The circular blade can be removed by loosening one of the blade locating rings. At the same time, the length of the plug-in slot in this embodiment is slightly longer than the length of the plug-in shaft, so the position of the circular knife can be fine-tuned by rotating the positioning sleeves on both sides of the circular knife fixed shaft, thereby achieving fine-tuning of the circular knife position.

[0019] See Figure 2 The middle of the fixed section is provided with a limit section 411 with an increased outer diameter. Two bearings are fixed in the sleeve and clamped on both sides of the limit section. In this embodiment, two bearings are used to clamp the limit spindle, thereby ensuring the axial fixation of the shaft assembly relative to the bracket.

[0020] See Figure 2 The two ends of the sleeve are respectively fixed with thrust rings 130 that abut against the bearings. The thrust rings are used to limit the position of the fixed bearings. The thrust rings and the inner cavity of the sleeve are screwed together, which is convenient for later maintenance and can be disassembled.

[0021] See Figure 1 The bracket also includes a prismatic shaft 600. A fixing sleeve 140 is provided on the bracket, which is fixedly connected to the prismatic shaft. A tightening bolt 150 is screwed onto the fixing sleeve and abuts against the prismatic shaft. The prismatic shaft not only secures the bracket, but also allows for adjustable spacing between the brackets to accommodate slitting spacing adjustments for different product lines.

[0022] A food packaging film slitting device includes a frame, a transmission assembly, a lower blade shaft, and a blade shaft assembly. The blade shaft assembly is characterized in that the blade shaft assembly is the aforementioned circular slitting blade shaft assembly, and the circular blade on the circular slitting blade shaft assembly abuts against the lower blade shaft. Because the aforementioned circular slitting blade shaft assembly has the aforementioned technical effects, a slitting device equipped with the circular slitting blade shaft assembly also has the same technical effects.

[0023] It is obvious to those skilled in the art that the present invention can be modified in many ways, and such modifications are not considered to depart from the scope of the present invention. All such modifications obvious to those skilled in the art are intended to be included within the scope of the present claims.

Claims

1. A slitting circular knife shaft assembly, characterized by: The invention comprises a plurality of brackets and shaft assemblies, wherein the bracket is provided with a shaft sleeve and a bearing fixed in the shaft sleeve; the shaft assembly comprises two end positioning shafts located at both ends, a plurality of positioning shafts and a plurality of circular knife fixing shafts, the end positioning shafts and the positioning shafts are fixedly plugged into the bearings in the shaft sleeve and are coaxially arranged with each other, the circular knife fixing shaft comprises a main shaft and a plug-in shaft coaxially arranged at both ends of the main shaft, a first thread is provided on the circumferential side wall of the main shaft, a circular knife and two blade positioning rings clamped and fixed on both sides of the circular knife are also sleeved on the main shaft, and the blade positioning ring is screwed on the first thread; the positioning shaft comprises a fixed section fixed to the bearing and a coaxial section located on both sides thereof The coupling section has a second thread and a plurality of sliding grooves distributed in a circumferential array on the circumferential outer wall of the coupling section, the coupling section is provided with a sliding sleeve and a positioning sleeve, the sliding sleeve is provided with a plurality of guide blocks adapted to the sliding groove, the positioning sleeve is screwed onto the second thread, the outer end of the coupling section is also provided with a plug-in groove, the plug-in shaft can be plugged into and matched with the plug-in groove, when the sliding sleeve is constrained by the positioning sleeve to move toward the side of the circular knife fixed shaft, the guide block will abut against the circumferential outer wall of the plug-in shaft, and the positioning sleeve can push the sliding sleeve to abut against the main shaft; the end positioning shaft includes a fixed section, a coupling section and a transmission section, and the transmission section is located at the outer end of the shaft assembly.

2. The slitting circular blade shaft assembly according to claim 1, characterized in that: A limiting section with an increased outer diameter is provided in the middle of the fixing section, and two bearings are fixed in the shaft sleeve and clamped on both sides of the limiting section.

3. The slitting circular blade shaft assembly according to claim 2, characterized in that: Thrust rings abutting against the bearing are fixed to both ends of the shaft sleeve.

4. The slitting circular blade shaft assembly according to claim 1, characterized in that: It also includes a prismatic shaft. The bracket is provided with a fixing sleeve fixedly sleeved with the prismatic shaft. The fixing sleeve is screwed with a tightening bolt abutting against the prismatic shaft.

5. A food packaging film slitting device, comprising a frame, a transmission assembly, a lower cutter shaft and a cutter shaft assembly, characterized in that: The knife shaft assembly is the slitting circular knife shaft assembly according to any one of claims 1 to 4, and the circular knife on the slitting circular knife shaft assembly abuts against the lower knife shaft.

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