The treatment measures of stretch film machine
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the treatment measures of  stretch film machine 

1, the effect of stretch forming  is poor

The reason:

(1)the heating temperature don't match, excessive, membrane stick on the heat sealing board, increase the fog degree of membrane, stretch forming local slants thin.Excessive heating temperature is low, the membrane heating temperature is low, cannot achieve membrane stretching temperature, stretching after broken.

(2) the tensile depth is deep.

(3)the heating plate and not enough heat 

The solution:

(1)in the correct use of the effective tensile range of membrane, the depth of the tensile membrane using thicker film stretch, shallow stretch film using thin film stretch, not only ensure the quality of the product, and reduce the production cost. 

(2) reduce or increase the heating plate temperature, adjust to the appropriate temperature range.

(3) maintenance, make its normal heating, assure the sufficient supply of the heat.

2, poor heat sealing

Phenomenon: the up and down the membrane after heat sealing plate or after sterilization, appear fluctuation are separated, stratification.

The reason:

(1) up and down one or two of membrane membrane inside and outside the thermal cover error.

(2) heat sealing temperature is low, can not reach the inner temperature of the heat sealing needs.

The solution:

(1) heat sealing temperature rising, the need of inner heat sealing materials of temperature, but not too high, otherwise it will appear on the phenomenon of heat sealing plate and membrane deformation problem.

(2) will be up and down one or two of membrane membrane hot cover to adjust, to ensure that the film thermal cover should be relatively up and down.

3, smoothness,

Curly, buckling phenomenon: products

The reason:

(1) the upper and lower membrane design is not reasonable.

(2) the membrane tension does not match up and down.

(3) sterilization method is bad.

(4) forming die shape, depth, don't match.

(5) the margin is not heat sealing.

The solution:

(1) the design of the upper and lower membrane into symmetrical structure, to reduce the stress between the different structure.

(2) the fluctuation of the membrane tension control match well, under the condition of guarantee the membrane formation, small tension control of as far as possible, to avoid uneven tension, and create a single film tension is big, after sterilization, membrane curl in the direction of tension of membrane.

(3) in the process of sterilization, the products are put to tidy, cannot appear between extrusion products, otherwise it will appear the phenomenon such as discount, crimp, buckling.

(4) stretch forming mould with similar to the shape of the products as far as possible, the depth of the slightly deeper than the thickness of the product, to reduce the membrane after tensile stress caused by the curl, buckling and so on.

(5) for heat sealing on the margins also, to increase the strength of upper and lower membrane, resist the role of membrane stress

4, have spirit in product packaging

Phenomenon: the heat sealing plate after the film in the air.

The reason:

(1) on membrane width size greater than the width of the heat sealing plate, the heat sealing plate vacuum vent plug, extract the air between the membrane.

(2) the vacuum machine malfunction, vacuum effect is poor.

(3) a foreign body heat sealing plate inside the vacuum air hole caused by congestion.

(4) poor heat sealing effect, some air leakage.

(5) cooperate when heat sealing film, up and down on the film deviation in the film, there are part of the heat sealing bad phenomenon.

(6) film under tensile break down of the holes, leak problem.

(7) on membrane pores, the leak problem.

(8) heat sealing temperature is too high, will be on membrane hot broken holes, leak problem.

There is crack (9) heat sealing gasket.

The solution:

(1) adjust the width of the film on to the appropriate width, and the heat sealing plate matching.

(2) vacuum machine maintenance.

Heat sealing plate (3) maintenance, remove the foreign body, security hole.

(4) to improve the heat sealing temperature, and compressed air pressure, guarantee the heat sealing intact.

(5) will be adjusted on the membrane, and the membrane with good, cannot appear film deviation from top to bottom, to ensure good film heat sealing up and down.

(6) to improve the effect of film under tensile, after stretch film under guarantee not appear small holes through them.

(7) to replace the membrane, membrane with good, promise not to leak.

(8) in the case of heat sealing good, try to reduce the heat sealing temperature, prevent hot broken on film.

(9) to adjust the heat sealing gaskets, make it a complete sealing surface.