CN203236757U

CN203236757U - Secondary slitting device for waste edge of plastic bag

Info

Publication number: CN203236757U
Application number: CN2013201755067U
Authority: CN
Inventors: 刘元江
Original assignee: SHANGHAI ZHOUTAI LIGHT INDUSTRIES MACHINE MANUFACTURING Co Ltd
Current assignee: SHANGHAI ZHOUTAI LIGHT INDUSTRIES MACHINE MANUFACTURING Co Ltd
Priority date: 2013-04-10
Filing date: 2013-04-10
Publication date: 2013-10-16
Anticipated expiration: 2023-04-10

Abstract

The utility model discloses a secondary slitting device for a waste edge of a plastic bag. The secondary slitting device comprises an upper cutter, a lower cutter, cutter holders, a cutter driving mechanism and a cutter holder moving mechanism; the upper cutter holder is arranged at the side face of an upper cross beam of a rack; the lower cutter holder is arranged at the side face of a lower cross beam of the rack; the upper cutter arranged at the upper cutter holder and the lower cutter arranged at the lower cutter holder are oppositely arranged and are movably fastened and connected by bolts; the upper and lower cross beams of the rack are respectively coaxially connected with two groups of piston type cylinder columns and cylinder barrels; the upper cross beam of the rack can vertically move on the combined cylinder body; the cutter driving mechanism comprises a cutter motor and a transmission assembly; and the cutter moving mechanism can be a moving motor, a servomotor or a step motor. Compared with the prior art, the secondary slitting device for the waste of the plastic bag has the advantages of being high in secondary positioning precision by adopting the upper and lower cutters to cut off slitting points in a moving cutter position mode, and has a high slitting speed achieving 100 times per minute; the integral repairing length of a manufactured bag depends on the front-and-back reciprocation displacement of the cutter whole bodies, and the mechanical inertia is small; the traction tension is stable without large change in one step of bag manufacturing; the cutters are easy to align; and the percent of pass of finished products is up to 98%.

Description

A kind of secondary cutting device of plastics bag slitter edge

Technical field

The utility model relates to plastics bag field, particularly a kind of secondary cutting device of plastics bag slitter edge.

Technical background

In plastics bag field, in order to make the uniform of product size, to carry out slitter edge excision operation for the surplus size between finishing room 0.5-3mm.The method of traditional slitter edge excision is to adopt film feeding control method, be that film delivery groups roller is under sensor and Electric Machine Control, to be cut film and be delivered to the edge of a knife, cutter is cut about by fixing cutter spacing minute point of contact being carried out, then film delivery groups roller continues input surplus size and is carrying out secondarily cutting, thereby finishes a minute cutting process.Because plastic sheeting is flexible material, itself exists the welding deformation that stress and deformation and high temperature bring, and exists following shortcoming to be:

1) production efficiency is low, can not run up per minute only 50 times/minutes;

2) the very short distance of film second traction causes the tension force sudden change large;

3) easily cause boiling hot cutter not overlap, scrappage is high;

4) machinery inertial is large.

The utility model content

For the drawback that above-mentioned conventional art exists, the utility model is intended to propose a kind of secondary cutting device of plastics bag slitter edge.

The technical scheme that its technical problem that solves the utility model adopts is: a kind of secondary cutting device of plastics bag slitter edge, comprise upper and lower cutting knife, cutoff knife rack, knife drive mechanism, knife rest travel mechanism, described upper cutter sets up and places frame entablature side, lower cutter sets up and places frame sill side, upper and lower cutting knife is arranged at up and down on the cutoff knife rack in opposite directions, be fastenedly connected by the bolt activity, frame entablature and frame sill respectively concentric are connected two groups of piston-type cylinder posts and cylinder barrel, but the upper and lower displacement on the cylinder body after the combination of frame entablature;

Described knife drive mechanism comprises cutter motor, transmission component, and wherein cutter motor is servomotor, and transmission component is by two gangbar, two groups of eccentric wheels, Timing Belt and synchronous pulleys, driving shaft; One of two gangbar is connected with the top of two cylinder posts respectively, and the other end is connected with two groups of eccentric wheels, and two of driving shafts are connected with two groups of eccentric connecting hole axle center, are fastenedly connected by puller bolt, and a synchronous belt wheel radially is set at the middle part of driving shaft;

Described knife rest travel mechanism is motor drive mode, connects a Power Drive Unit at the end of displacement driving shaft, and this device comprises displacement motor, reduction box, bevel gear, universal driving shaft, driving gear and driven gear.

The mobile motor of described knife rest travel mechanism is servomotor or stepper motor.

Driving shaft in the described knife rest travel mechanism in universal driving shaft and the knife drive mechanism each other antarafacial be arranged in parallel.

Adopted mobile cutter spacing that the method that cutter is up and down cut is carried out at minute point of contact compared with conventional art the utility model, but the secondary positioning accuracy high, cut the speed high-speed cruising, per minute can 100 times/minutes; The monolithic finish length of bag relies on cutting knife integral body front and back shift reciprocately, and machinery inertial is little; Drawing tension of bag is steady, without sudden change; Cutting knife is easily aimed at, and product qualified rate is up to more than 98%.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is the utility model knife rest travel mechanism structural representation;

Among its figure: the 1-upper cutter; The 2-lower cutter; The 3-gangbar; 4-angular wheel 1; 5-angular wheel 2; The 6-displacement motor; The 7-eccentric wheel; The 8-Timing Belt; The 9-synchronous pulley; The 10-cutter motor; The 11-gangbar; The 12-signal panels; The 13-inductive switch; The 14-reduction box; The 15-driving gear; The 16-driven gear; The 17-driving shaft; The 18-screw rod; 19-screw rod slide block; 20-lower slide slide block; The 21-lower slide; The 22-ball-joint; 23-cylinder post; 24-frame entablature; The 25-cylinder barrel; 26-frame sill; The 27-guide rail; 28-film delivery groups roller; 29-upper tool post slide block, the 30-plastic sheeting.

The specific embodiment

The below is elaborated to the utility model with reference to the utility model preferred embodiment and Figure of description.

When being welded into polybag with plastic sheeting 30, what generally adopt is two side sealings before and after same boiling hot cutter is finished, can set cutting according to designing requirement and revise length, usually this correction length is 1mm, displacement motor 6 drives screw rod 18 and rotates, 19 translational motions of screw rod slide block, after driving frame sill 26 and frame entablature 24 integral translation 1mm, cutter motor 10 drives upper cutter 1 motion, carrying out polybag slitter edge secondary cuts, then upper cutter 1 turns back to highest order and returns to opening, finishes do action one time, realizes that polybag only needs once to carry.

Cutter motor 10 drives synchronous pulley 9, via Timing Belt 8, connect driving shaft 17, eccentric wheel 7, driving shaft 17 is under the driving of cutter motor 10 power, drive simultaneously 7 rotations of two side eccentric wheels, eccentric wheel 7 transmission gangbar 11 stop at highest order after the cut-out each time, are to be realized by inductive switch triggering signal dish.After carrying out the first cutting, upper cutter 1 stop motion, this moment, film delivery groups roller 28 was according to setting, carry out the feed length correction, generally between 0.5-3mm, then cutter motor 10 carries out for the second time cut-out of secondary circular motion realization, and the slitter edge that scales off collects in the scrap collecting tank.

The above only is a preferred embodiment of the present utility model; can not limit protection domain of the present utility model with it; the utility model also can have other structural change; so long as the equalization of doing according to protection domain of the present utility model changes and modify, all should belong in the scope that the utility model contains.

Claims

1. the secondary cutting device of a plastics bag slitter edge comprises upper and lower cutting knife, cutoff knife rack, and knife drive mechanism, knife rest travel mechanism is characterized in that:

Described upper cutter sets up and places frame entablature side, lower cutter sets up and places frame sill side, upper and lower cutting knife is arranged at up and down on the cutoff knife rack in opposite directions, be fastenedly connected by the bolt activity, frame entablature and frame sill respectively concentric are connected two groups of piston-type cylinder posts and cylinder barrel, but the upper and lower displacement on the cylinder body after the combination of frame entablature;

2. the secondary cutting device of plastics bag slitter edge according to claim 1 is characterized in that the mobile motor of described knife rest travel mechanism is servomotor or stepper motor.

3. the secondary cutting device of plastics bag slitter edge according to claim 1, it is characterized in that in the described knife rest travel mechanism driving shaft in the universal driving shaft and knife drive mechanism each other antarafacial be arranged in parallel.