CN-121989323-A - Edge cutting knife and film blowing machine for electric heating plastic film cylinder material

Abstract

The invention discloses an edge opening knife for an electric heating plastic film cylinder and a film blowing machine, wherein the edge opening knife comprises a knife holder and a hot knife assembly arranged on the knife holder, the knife holder is provided with an avoidance groove, a cold knife assembly facing the avoidance groove is detachably arranged at the bottom of the knife holder, the cutting edge of the cold knife assembly stretches into the avoidance groove, the hot knife assembly comprises a heating assembly detachably arranged on one side of the knife holder and a hot knife detachably arranged on the heating assembly, the other side of the knife holder is provided with a knife holder guide edge, a matching groove is formed above the avoidance groove on the knife holder guide edge, and the cutting edge of the hot knife stretches into the matching groove. According to the technical scheme, the split edge stretching deformation of the film barrel material when the film is stripped can be avoided, the opening tension is increased to generate wavy laces, the product quality is improved, the knife holder guide edge of the knife holder can always hook the folded edge of the film barrel material through the position adjusting assembly, the opening is ensured to be on the folded edge, and the film opening is free of barbs.

Inventors

• SHANG FEI
• Weng Weize
• FANG WENQIAO
• ZHAO FENG
• LI LIN

Assignees

• 骏业塑胶（深圳）有限公司

Dates

Publication Date

20260508

Application Date

20241030

Claims (10)

1. 1. The electric heating plastic film tube material edge cutting knife is characterized by comprising a knife holder and a hot knife assembly arranged on the knife holder; The cutter holder is L-shaped, the cutter holder is provided with an avoidance groove, the bottom of the cutter holder is detachably provided with a cold blade assembly facing the avoidance groove, and the cutting edge of the cold blade assembly extends into the avoidance groove; The hot knife assembly comprises a heating assembly detachably arranged on one side of the knife holder and a hot knife blade detachably arranged on the heating assembly, a knife holder guiding edge is arranged on the other side of the knife holder, a matching groove is formed in the knife holder guiding edge above the avoidance groove, and the knife edge of the hot knife blade stretches into the matching groove.
2. 2. The edge cutting knife for the electric heating plastic film cylinder according to claim 1, wherein the heating component comprises a fixing seat, a first knife clamping block arranged on the fixing seat and a second knife clamping block connected with the first knife clamping block, the hot knife is arranged between the first knife clamping block and the second knife clamping block, heating pipes for heating the hot knife are arranged on the first knife clamping block and the second knife clamping block, a temperature sensor is arranged on the first knife clamping block or the second knife clamping block, and heat insulation sleeves are respectively arranged at the bottoms of the first knife clamping block and the second knife clamping block.
3. 3. The edge slitting knife of claim 2, wherein the cold blade assembly comprises a cold blade and a clamping blade, the cold blade is fixed on the knife holder through the clamping blade, and the dodging groove is formed in the tops of the knife holder and the clamping blade.
4. 4. An electrically heated plastic film cartridge edge slitting knife as defined in claim 3 wherein said knife holder is provided with a mounting slot for mating with said clamping blade, said cold blade being disposed obliquely within said mounting slot by said clamping blade.
5. 5. An electrically heated plastic film cartridge edge slitting knife as claimed in any one of claims 3 or 4 wherein the blade holder is metal.
6. 6. A film blowing machine comprising an electrically heated plastic film cartridge edge slitting knife as claimed in any one of claims 1 to 5.
7. 7. The film blowing machine of claim 6, further comprising a position adjustment assembly, wherein the electrically heated plastic film cartridge edge slitting knife is coupled to the position adjustment assembly.
8. 8. The film blowing machine of claim 7, wherein the position adjusting assembly comprises a guide rod, a sliding block, two rocker arms and a swinging block, two ends of the guide rod are connected through a connecting plate, the sliding block is arranged on the guide rod in a sliding mode, a first rocker arm and a second rocker arm of the rocker arms are respectively arranged on the sliding block through a first rotating shaft and a second rotating shaft, one side of the swinging block is connected with the first rocker arm and the second rocker arm, the other side of the swinging block is connected with the cutter holder through a third rotating shaft and a fourth rotating shaft, and the first rocker arm and the second rocker arm can swing around the third rotating shaft and the fourth rotating shaft respectively.
9. 9. The film blowing machine of claim 8, wherein the position adjustment assembly further comprises a weight disposed on the slider, the weight being connected to an upper end of the first or second rocker arm.
10. 10. The film blowing machine of claim 9, wherein the sliding block is adjustably disposed on the guide bar by a first handle screw, the balancing weight is rotatably disposed on the sliding block by a connecting rod, and one end of the connecting rod is connected with an upper end of the first rocker arm or the second rocker arm.

Description

Edge cutting knife and film blowing machine for electric heating plastic film cylinder material Technical Field The invention relates to the technical field of plastic film processing, in particular to an electric heating plastic film tube material edge cutting knife and a film blowing machine for opening processing of a film tube material in the plastic film bag making process. Background The working structure of the traditional plastic film tube material edge cutter is shown in fig. 1 and 2, and comprises a cutter holder 1, a cutter holder guide edge 2, a cold cutter blade 3 and a clamping cutter blade 4, wherein the cold cutter blade 3 is arranged on the cutter holder 1 through the clamping cutter blade 4 by adopting a screw 5. When the flange 7 of the plastic film tube 6 moves in the direction of the arrow shown in the drawing, the flange 7 of the film tube 6 is split by the cold blade 3 when it moves along the holder guide edge 2 to the cold blade 3. When the edge is opened, the film is stressed greatly, after long-time working, the cold blade 3 is easy to wear and is not sharp, when the film is opened, the edge is stretched and deformed, the opening tension is increased, wavy laces are generated, and the product quality is obviously affected. Disclosure of Invention The invention mainly aims to provide an edge cutting knife and a film blowing machine for an electric heating plastic film tube material, which aim to prevent the cutting edge from stretching and deforming when the film tube material peels off a film, and the opening tension is increased to generate wavy laces, so that the product quality is improved. In order to achieve the aim, the invention provides an electric heating plastic film tube material edge cutter which comprises a cutter seat and a hot cutter assembly arranged on the cutter seat; The cutter holder is L-shaped, the cutter holder is provided with an avoidance groove, the bottom of the cutter holder is detachably provided with a cold blade assembly facing the avoidance groove, and the cutting edge of the cold blade assembly extends into the avoidance groove; The hot knife assembly comprises a heating assembly detachably arranged on one side of the knife holder and a hot knife blade detachably arranged on the heating assembly, a knife holder guiding edge is arranged on the other side of the knife holder, a matching groove is formed in the knife holder guiding edge above the avoidance groove, and the knife edge of the hot knife blade stretches into the matching groove. According to a further technical scheme, the heating assembly comprises a fixing seat, a first cutter clamping block and a second cutter clamping block, wherein the first cutter clamping block is arranged on the fixing seat, the second cutter clamping block is connected with the first cutter clamping block, the hot blade is arranged between the first cutter clamping block and the second cutter clamping block, heating pipes for heating the hot blade are arranged on the first cutter clamping block and the second cutter clamping block, temperature sensors are arranged on the first cutter clamping block or the second cutter clamping block, and heat insulation sleeves are respectively arranged at the bottoms of the first cutter clamping block and the second cutter clamping block. According to a further technical scheme, the cold blade assembly comprises a cold blade and a clamping blade, the cold blade is fixed on the tool apron through the clamping blade, and the avoiding grooves are formed in the tops of the tool apron and the clamping blade. According to the technical scheme, the tool apron is provided with a mounting groove matched with the clamping blade, and the cold blade is obliquely arranged in the mounting groove through the clamping blade. According to the technical scheme, the tool apron is made of metal. In order to achieve the above purpose, the invention also provides a film blowing machine, which comprises the electric heating plastic film barrel material edge cutter. According to the technical scheme, the film blowing machine further comprises a position adjusting assembly, and the electric heating plastic film cylinder material edge cutting knife is connected with the position adjusting assembly. According to a further technical scheme, the position adjusting assembly comprises two guide rods, a sliding block, two rocker arms and a swinging block, wherein two ends of the guide rods are connected through a connecting plate, the sliding block is arranged on the guide rods in a sliding mode, a first rocker arm and a second rocker arm of the two rocker arms are arranged on the sliding block through a first rotating shaft and a second rotating shaft respectively, one side of the swinging block is connected with the first rocker arm and the second rocker arm, the other side of the swinging block is connected with the tool apron through a third rotating shaft and a fourth rotating shaft, and the first rocker a