Stretch Film Machine Principle

Two pairs of guide rails and their driving components, four sets of fixtures and their driving components. Them. Each pair of guide rail in the two guideways parallel to each other, a pair of guide rails and another pair of lead rails are vertically staggered, each two mutually perpendicular staggered rail staggered are respectively provided with a two-way slider; each guide rails are provided with a plurality of slide, each slide block are respectively fixed a fixture; fixture drive assembly is composed of a connecting rod hinged in turn. Fixture where rail two two-way slider are provided with perpendicular to the guide rail and an elongated slot, fixture drive components two end in grooves corresponding to the strip, clamp driving component inside the hinge pin is fixed on the corresponding slider or fixture. The structure of the stretching mechanism is practical, reliable and accurate.

2. stretch working table.

Using the double step motor, through the sprocket drive, driven by the 2 groups of lead screw, respectively, to achieve the Y, X direction of the stretching action. By casting or rolling thick film (about 120 to 100 mm x 120 ~ 100mm Square) thick film edges by the film clamp, thick film after heating. Driven by 2 sets of retractable stretching mechanism. Film clip is made of gas brake clip. Install 9 or 7 folders on each side, a total of 36 or 28. Each clip is held in the 5mm. Movement along the X, Y direction, so as to realize the two-way stretch of thick film. 120X120mm or 100x100 mm piece by the four sides of the clamp, clip mouth outer membrane sheet heating area is 110X110mm or 90X90 mm and effective tensile rate according to the effective clip shall prevail, a stretch zone or 6X6=360mm 8X8=640mm is 0.64 square meters or 0.36 square meters.

3. pull film working platform.

When thick slices on the workbench flat after clamping, start conveying motor button, automatically open the oven door, tensile and moved into district heating. Oven door automatically shut down, the device enters the state of heating. After the completion of the drawing process, start button, drawing the mobile station exit zone heating, back loading unloading area film, film clamping and discharging pressure clamp loose, remove the membrane specimens. This model does not include the setting device.

4.heating device

The heating device is composed of three groups of electric heaters. The first group is the normal electric heater, the second group is the controllable electric heater, the third group is the standby electric heater, the PID control, the precision is 1.

5. hot air system

By air blower, heat exchanger, pipeline, two static pressure box, etc.. By hot air under static pressure box out wind hole to play to in the center position of a thick plate below, about 10 meters per second of air so that film thickness uniform heating. The heating time and the hot air temperature can be set according to the material, thickness, etc.. The preheating zone and the drawing area are the same area. The heat transfer is the process of the air convection in the air to the diaphragm. Taking BOPP sheet as an example, it is necessary to heat up to fifteen minutes to reach the - 156 - 168 - - to - - to - - to - temperature, which has a certain effect on the environment temperature. After the sample enters the preheating zone, the thickness of the BOPP 1mm sheet is about three minutes from the room temperature to 168.

6. pneumatic system

Provide air pressure for the film clip and clamp force on the thick film chip. The required air pressure of the clamping plate is 2.5 Mpa.

7. electrical and control system

Friendly control panel and man-machine interface can be operated easily, using logic control, stepping motor with accurate pulse control axis, 360 degree position in each rotation. And achieve the following settings:

A) setting up a two way stretch or one way stretch;

B) setting tensile ratio;

C) setting tensile rate;

D) setting the heating temperature and heating time;

E) work in automatic or manual mode.