Film slitting device capable of replacing blades on line

Abstract

The utility model relates to a thin film slitting device capable of replacing blades on line. The thin film slitting device comprises a supporting guide rod arranged in the width direction of a thin film and two slitting mechanisms which are symmetrically installed on the supporting guide rod and can slide left and right along the supporting guide rod. Each slitting mechanism comprises a fixed plate and a common blade which is detachably mounted on the fixed plate and is used for slitting a film, a groove for placing a spare blade is formed in the fixed plate above the common blade, and a magnet block for adsorbing the spare blade is fixed at the bottom of the groove; an air delivery pipe is fixed on the fixing plate and is bent at the top end of the fixing plate to form a film blowing part with an arc-shaped structure, and an air outlet is formed in the top end of the film blowing part. According to the utility model, the common blade can be quickly replaced on line, time and labor are saved, the common blade can be replaced without stopping, the production efficiency is improved, and the problem of film adhesion caused by blade replacement after stopping is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic films, in particular to a film slitting device capable of changing blades online. Background Art

[0002] When processing plastic film, plastic raw material particles are added to the extruder and melted, and then extruded from the annular gap of the front port die into a cylindrical (tube) shape. Compressed air is introduced from the center hole of the mandrel of the die head to blow the cylinder into a bubble tube shape (generally blown up 2-3 times). At this time, there is elongation in both the vertical and horizontal directions to obtain a bubble tube with a certain blowing multiple. It is cooled by an outer air ring (sometimes with internal cooling), and then enters the guide splint and traction roller to flatten the bubble tube to prevent the air in the bubble tube from leaking out to maintain the required constant blowing pressure. The flattened bubble tube becomes a flat-folded double-layer film, which is cut into two equal pieces of film by a cutter at the flat fold, and finally enters the winding device for winding.

[0003] The blades used for slitting thin films need to be replaced regularly to ensure the uniformity of the film slitting. The existing slitting device must be shut down to replace the blades, which affects the production efficiency on the one hand, and the film is prone to adhesion when the blades are stopped to change, which affects the product quality on the other hand. Therefore, there is an urgent need for a film slitting device that can replace the blades online. Utility Model Content

[0004] The utility model aims at the deficiencies of the prior art and provides a film slitting device capable of changing blades online.

[0005] The utility model is realized through the following technical scheme, and provides a film slitting device capable of changing blades online, comprising a supporting guide rod arranged along the width direction of the film and two slitting mechanisms symmetrically mounted on the supporting guide rod and capable of sliding left and right along the supporting guide rod; each slitting mechanism comprises a fixed plate and a common blade detachably mounted on the fixed plate and used for slitting the film, a groove for placing a spare blade is arranged on the fixed plate above the common blade, and a magnet block for adsorbing the spare blade is fixed at the bottom of the groove; an air delivery pipe is fixed on the fixed plate, the air delivery pipe is bent at the top end of the fixed plate to form a film blowing part with an arc structure, and an air outlet is arranged at the top end of the film blowing part.

[0006] Preferably, the fixed plate is an L-shaped structure formed by fixing a horizontal plate and a vertical plate, and the horizontal plate is connected to the moving block.

[0007] Preferably, a mounting hole is provided on the transverse plate, and the fixing bolt is connected to the moving block after passing through the mounting hole.

[0008] Preferably, the common blade is installed on the inner side of the connection between the horizontal plate and the vertical plate, and the common blade is exposed on the inner side of the horizontal plate and the vertical plate to form a cutting portion with a triangular structure.

[0009] Preferably, a mounting groove is provided at the connection between the horizontal plate and the vertical plate, and the blade is located in the mounting groove and is fixed by a pressing block.

[0010] Preferably, a fixing hole is provided on the pressing block, and the fastening bolt passes through the fixing hole and is connected to the fixing plate.

[0011] Preferably, the supporting guide rods are two arranged in parallel, both ends of each supporting guide rod are fixed to the frame, two moving blocks are slidably mounted on the supporting guide rods, and the two slitting mechanisms are respectively mounted on one moving block.

[0012] Preferably, there are two magnet blocks in the groove to enhance the adsorption strength of the spare blade.

[0013] Preferably, the gas pipe is a copper pipe, the air inlet of the gas pipe is connected to an air pump through a gas hose, and the air pump supplies air to the gas pipe.

[0014] The beneficial effects of the utility model are:

[0015] 1. The utility model has a simple structure and can quickly complete the replacement of commonly used blades online, saving time and effort. Common blades can be replaced without stopping the machine, which improves production efficiency, avoids the problem of film adhesion due to stopping to replace blades, and ensures product quality.

[0016] 2. When replacing the common blade, put the spare blade in the groove, and use the spare blade to cut the film instead of the common blade. Therefore, when replacing the common blade, it will not affect the normal cutting work of the film, and the common blade can be replaced without stopping the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the slitting mechanism of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the briquette of the utility model;

[0020] As shown in the figure:

[0021] 1. Support guide rod, 2. Frame, 3. Moving block, 4. Common blade, 5. Groove, 6. Magnet block, 7. Air pipe, 8. Air outlet, 9. Horizontal plate, 10. Vertical plate, 11. Mounting hole, 12. Press block, 13. Fixing hole. DETAILED DESCRIPTION

[0022] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0023] like Figure 1-3As shown, the utility model comprises a support guide rod 1 arranged along the width direction of the film and two slitting mechanisms symmetrically mounted on the support guide rod 1 and capable of sliding left and right along the support guide rod 1. The support guide rods 1 are two parallel arranged, each of which is fixed to a frame 2 at both ends, and two moving blocks 3 are slidably mounted on the support guide rod 1, and the two slitting mechanisms are respectively mounted on one moving block 3.

[0024] Each slitting mechanism includes a fixed plate and a common blade 4 detachably mounted on the fixed plate and used for slitting the film. A groove 5 for placing a spare blade is provided on the fixed plate above the common blade 4, and a magnet block 6 for adsorbing the spare blade is fixed at the bottom of the groove 5.

[0025] An air pipe 7 is fixed on the fixed plate. The air pipe 7 is bent at the top of the fixed plate to form an arc-shaped film blowing part. An air outlet 8 is arranged at the top of the film blowing part. Compressed air is introduced through the air pipe 7 and ejected through the air outlet 8. The gas ejected from the air outlet 8 forms a local gap in the film, thereby opening the bonded double-layer film to prevent the film from sticking together and ensure the normal slitting of the film. The film blowing part has an arc-shaped structure, which is convenient for the film to unfold and makes the edge of the film neat.

[0026] The fixed plate is an L-shaped structure formed by fixing a horizontal plate 9 and a vertical plate 10. The horizontal plate 9 is connected to the moving block 3. A mounting hole 11 is provided on the horizontal plate 9. The fixing bolts penetrate the mounting hole 11 and are connected to the moving block 3. The common blade 4 is installed on the inner side of the connection between the horizontal plate 9 and the vertical plate 10. The common blade 4 is exposed on the inner side of the horizontal plate 9 and the vertical plate 10 to form a triangular structure of the cutting part. A mounting groove is provided at the connection between the horizontal plate 9 and the vertical plate 10. The blade is located in the mounting groove and is fixed by a pressing block 12. A fixing hole 13 is provided on the pressing block 12. The fastening bolts penetrate the fixing hole 13 and are connected to the fixed plate.

[0027] In this embodiment, the gas pipe 7 is a copper pipe, and the air inlet of the gas pipe 7 is connected to the air pump through a gas hose, and the air pump supplies air to the gas pipe 7.

[0028] In this embodiment, there are two magnet blocks 6 in the groove 5 to enhance the adsorption strength of the spare blade.

[0029] When the film is cut, the vertical plate 10 of the fixed plate is located at the folded edge inside the double-layer film, and the film winding device winds up and drives the film to move. When the double-layer film passes through the common blade 4, it is cut into two pieces of film by the common blade 4. When the common blade 4 needs to be replaced, first manually cut a gap in the film near the groove 5, put the spare blade into the groove 5 from the gap, and quickly position and fix the spare blade through the magnet block 6. At this time, the double-layer film passing through this place is cut into two pieces of film by the spare blade, and the staff removes the pressing block 12 and the common blade 4, replaces the new common blade 4 and fixes it through the pressing block 12. When the common blade 4 is replaced, the film is cut by the spare blade, so the common blade 4 can be replaced without stopping the machine, which effectively solves the problem of film waste caused by film adhesion when replacing the blade in the existing slitting device. After the common blade 4 is replaced, the spare blade is removed, and the film continues to be cut by the common blade 4.

[0030] The utility model has a simple structure and can quickly complete the replacement of the commonly used blades 4 online, saving time and labor. The blades can be replaced without stopping the machine, thereby improving production efficiency, avoiding the problem of film adhesion due to stopping the machine to replace the blades, and ensuring product quality.

[0031] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A film slitting device capable of changing blades online, comprising a supporting guide rod arranged along the width direction of the film and two slitting mechanisms symmetrically mounted on the supporting guide rod and capable of sliding left and right along the supporting guide rod; characterized in that: Each slitting mechanism includes a fixed plate and a common blade detachably mounted on the fixed plate and used for slitting the film; a groove for placing a spare blade is arranged on the fixed plate above the common blade, and a magnet block for adsorbing the spare blade is fixed at the bottom of the groove; an air pipe is fixed on the fixed plate, the air pipe is bent at the top of the fixed plate to form an arc-shaped film blowing part, and an air outlet is arranged at the top of the film blowing part.

2. A film slitting device capable of online blade change according to claim 1, characterized in that: The fixed plate is an L-shaped structure formed by fixing a horizontal plate and a vertical plate, and the horizontal plate is connected to the moving block.

3. A film slitting device capable of online blade change according to claim 2, characterized in that: The horizontal plate is provided with a mounting hole, and the fixing bolts penetrate through the mounting hole and are connected with the moving block.

4. The film slitting device capable of online blade change according to claim 2, characterized in that: The common blade is installed on the inner side of the connection between the horizontal plate and the vertical plate, and the common blade is exposed on the inner side of the horizontal plate and the vertical plate to form a cutting part with a triangular structure.

5. The film slitting device capable of online blade change according to claim 4, characterized in that: A mounting groove is arranged at the connection between the horizontal plate and the vertical plate, and the blade is located in the mounting groove and is fixed by a pressing block.

6. A film slitting device capable of online blade change according to claim 5, characterized in that: A fixing hole is arranged on the pressing block, and a fastening bolt passes through the fixing hole and is connected with the fixing plate.

7. The film slitting device capable of online blade change according to claim 1, characterized in that: The supporting guide rods are two parallelly arranged, both ends of each supporting guide rod are fixed to the frame, two moving blocks are slidably installed on the supporting guide rods, and the two slitting mechanisms are respectively installed on a moving block.

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