4.1. Feeding mechanism
This machine is equipped with a push finger chain on the feeding mechanism. The tension of the push finger chain is adjusted by the two hand wheels at the left end of the feeding mechanism, which adjust the tension of the push finger chain. When the material to be wrapped is determined, the width of the guide slot of the feeding mechanism is first adjusted so that the material to be wrapped can move smoothly in the guide slot.
4.2. Paper feeding mechanism
1) Envelope bypass path
Once the roll of packaging film has been mounted on a roller with automatic alignment clamping, the film must follow a certain path. The film winding path varies slightly depending on whether the coder is installed or not.
Regardless of the above mentioned winding path, when the film enters the bag maker, open the centre seal opening and closing handle so that the paper passes through the pulling wheel, the centre seal heating plate, the pressing wheel, then close the opening and closing handle and tap to run so that the film passes through the end seal knife, to complete the film loading.
2) Envelope tension and alignment adjustment
When the film is passing through the bag maker, if the film tension is uneven – tight on both sides and loose in the middle or loose on both sides and tight in the middle, it will cause the paper to go out of order, and the position of the pendulum roller (see Figure 2) or the angle of the pendulum rod shall be adjusted to change the relative position between the pendulum roller and the bag maker to achieve the requirement of uniform film tension.
If the middle seal of the packaged product is not aligned, adjust the “film alignment handwheel”, the amount of adjustment should not be too large each time (because the effect is not immediately reflected), until the two sides of the middle seal are aligned.
4.3. Bag maker
The bag maker is a fixed bag maker that cannot be adjusted for width and needs to be made according to the size of the product. The width of the bag maker should be the width of the product to be bagged, plus a slight gap of approximately 5 mm.
The height of the bag maker should be the height of the bagged material, plus a slight gap of approximately 10mm.
4.4. Centre seal mechanism
The middle sealing mechanism mainly consists of paper pulling wheel, heating block, pressing wheel, opening and closing handle, pressing wheel speed adjusting hand wheel, etc. When the wrapping film passes through the paper pulling wheel, heating block, pressing wheel, if there is paper accumulation or paper pulling phenomenon between the paper pulling wheel and pressing wheel, it should be adjusted by the pressing wheel speed adjusting hand wheel.
The effect of the middle seal should be a firm seal and a clear pattern, otherwise it should be adjusted, with the following adjustment requirements:
1) Using two sheets of white paper sandwiched between a copy paper, turn the two meshed middle seal wheels for a week, open them to see their traces to be clear and even, otherwise the two wheels must be adjusted to the meshed position, then the indentation observation, repeatedly adjust until the traces are clear and even.
2) If the seal quality is still not satisfactory with the correct engagement and temperature, adjust the positioning screw to limit the sealing wheel engagement pressure until the seal is aesthetically pleasing.
The machine has been adjusted before leaving the factory and the centre seal components have been qualified, so normally no adjustment is required.
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