CN2158340Y

CN2158340Y - Machine for making plastic bag

Info

Publication number: CN2158340Y
Application number: CN 93218779
Authority: CN
Inventors: 杨彦君; 马晓建
Original assignee: WEIHE PLASTIC COLOUR PRINTING HOUSE
Current assignee: WEIHE PLASTIC COLOUR PRINTING HOUSE
Priority date: 1993-07-17
Filing date: 1993-07-17
Publication date: 1994-03-09
Anticipated expiration: 2003-07-17

Abstract

The utility model relates to a machine for making plastic bags, particularly the improvement of the feed and the folding part of the machine for making bags. The utility model especially uses a triangular feed plate, and the expanding plastic is compounded with the plane material, and then the composition is folio and is led into the feed sticks to be squeezed and be folded. So that the waste caused by displacement after folding is reduced. The utility model is suitable for variety of bilateral slit and mid slit machine for making plastic bag.

Description

Machine for making plastic bag

The utility model relates to a kind of plastic bag making machine, especially to the modifying device of the guide folded part of plastic bag making machine.

Existing plastic bag making machine contains blowing, guide, folding and moulding, several parts of traction.When wherein folding, with plastic cover lead into vertical direction directly folding through the extruding of horizontal two folding material rods up and down, the problem that exists is a no guide body between vertical guide rod and the level folding material rod, make the tensile force inequality of folding material, misplace easily when folding, the reliability of doubling is low fully, causes the percent defective height.

The application's purpose is in order to overcome the prior art shortcoming, to provide a kind of accurately folding, can effectively reducing the waste product that causes because of folding dislocation.

Technical scheme is as follows: at the guide of plastic bag making machine, its guide rod horizontal cross of folded part is provided with, two folding material that can rotate in opposite directions are positioned at guide rod below to rod, level vertically is provided with, the folding flitch that an isoceles triangle shape is arranged between guide rod and folding material rod, the base of this folding flitch upwards parallels with the guide rod, folding material rod centre joint place is pointed on the top downwards, the folding flitch expects to have between the rod angle to make folding flitch base center line equate to the distance of rolling over material rod center line with the two edges of compound material through the distance of drift angle to folding material rod with folding, make by folding material everywhere tensile force equalization in the break-in process, with guarantee the folding material accurately and smooth.During use, under the effect of tractive force, the compound material of plastics will expect to launch to roll over flitch through triangular shape through horizontal cross guide rod, with compound charge level doubling, import and will enter moulding section after extruding folds in the folding material rod.

Technique scheme has overcome existing plastic bag making machine, because of the uneven folding easily defective of dislocation of tensile force, has improved yield rate greatly in the folding program.

Below in conjunction with the embodiment accompanying drawing this application is described in further detail.

Fig. 1 is blowing, guide, the folded part structural representation of the application's plastic bag making machine.

Fig. 2 is blowing, guide, folding principle schematic.

As shown in Figure 1, horizontal up and down respectively movable supporting has blowing rod 6 on a side of frame shape frame 7, guide bars 5, on two columns 8 above the frame, movable supporting has guide rod 1, the upper horizontal longitudinally-moving of the following methods, rack 7 of guide rod is supported with the folding material to rod 4, between guide rod 5 and folding material are to rod 4, be provided with the folding flitch 2 of an isoceles triangle shape, the base of folding flitch is upwards parallel with guide rod 5, the centre joint place of folding material to rod 4 pointed on the top downwards, this folding flitch 2 is fixed on the cross bar of framework pillar 8 by strut 3, and by the telescopic adjustment folding flitch 2 of strut 3 and the angle between the folding material rod, make by the folding material to be in all the time under the even tensile force situation, smooth to guarantee the folding material.

Roll in the material principle at Fig. 2 and plastic composite 9 to be launched by blowing rod 6, guide bars 5 and guide rod 1, and through triangular shape folding flitch, to expect will expect that to rod 4 extruding is folding by the folding material again after the doubling, thereby accurately finish folding material program, arrow is depicted as compound material pulling motion direction among the figure.

Each blowing rod 6 described in Fig. 1, Fig. 2, guide bars 5, guide rod 1 and folding material all can rotate relative to frame rod 4.

When folding flitch 2 is an equilateral triangle, if the leg-of-mutton length of side is L, folding flitch 2 and folding material to the angle between the rod 4 are, according to folding flitch center line through drift angle to the folding material to the distance of the rod centre joint should equal compound material edge from a base angle of rolling over flitch to rolling over the principle of expecting to the distance of the rod centre joint, calculate through theory, folding flitch and folding material are 54.7 ° of 54-55 ° of theoretical angles to the optimum angle between the rod.

Claims

1, a kind of plastic bag making machine contains blowing, guide, folded part, it is characterized in that the structure of described folded part establishes the folding flitch of an isoceles triangle shape below a horizontal cross guide rod, the base of folding flitch is upwards parallel with horizontal guide rod, and the centre joint place of the vertical folding material that is provided with of a level to rod pointed on the top of stock guide downwards.

2, plastic bag making machine as claimed in claim 1 is characterized in that the folding flitch of described isoceles triangle shape is fixed on the frame by strut, rolls over the angle between flitch and the folding material pair roller simultaneously, by the telescopic adjustment of strut.