Post Finishing Technology (629-646)

629. What are the format specifications of the international standard type A paper?

A: The international standard size A format paper has two sizes: 889mm X 1240mm and 900mm X 1280mm.

630. What are the cutting specifications for commonly used A-type paper?

Answer: As shown in Table 1, the specifications are all length x width.

631. B-type paper commonly used in the number of cutting specifications which?

A: As shown in Table 2, specifications are all length x width.

632. What is the sizing at the time of cutting?

Answer: The sizing at the time of cutting is based on the number of materials to be opened. The more the number of openings, the more sizing. Under normal circumstances, the minimum number of cuts, including light edges, is 4mm. With the increase in the number of cuts and the increase in the number of cuts, cuts naturally increase.

633. How to unload a knife when using a cutter?

A: When unloading the knife, the first step is to lower the blade to the lowest position to make it come into contact with the blade, stop the machine at the same time and stop all activities of the brake; in the second step, loosen the bolts that are exposed on the outside of the blade and insert the blade. After gently touching the blade, unscrew the bolt and raise the knife holder (cartridge or blade) back to its original position: Step 3: Use both hands to pinch the back or both ends of the blade underneath and remove it. After inserting the knife box, the unloading operation is completed when the tool is changed.

634. Which form of sharpener?

A: There are two types of sharpening machines, flat and arc.

635. Which type of sharpening is better and why?

Answer: The sharpening form of the plane grinder is better because the angle α of the blade that it grinds is a straight line and the bearing capacity is large, which can prolong the service life of the blade and increase the cutting times of the blade.

636. What are the disadvantages of the arc sharpening form?

A: The blades worn by the arc-type grinder have a certain degree of curvature, which affects the blade. The accuracy of the angle causes a drop in the shear resistance, resulting in premature wear of the blade, a shortened service life, and a reduced number of cuts.

637. How to replace a new blade?

A: When replacing a new blade or re-sharpened blade, first check the blade. Check whether the cutting angle of the work piece is consistent with that of the cut work piece. Then use a cloth to clean the blade from top to bottom. Do not rub it against or along the edge of the blade to avoid causing a bumping accident. Attention should be paid when replacing: 1 Do not touch the blade with any hard object to ensure the sharpness of the blade; 2 The height of the tool change should be appropriate so that the paper can be cut without touching the blade to the paper; 3 Tool change Afterwards, a detailed examination must be carried out. If irregularities are found and adjustments are made in time, the inspections are correct and they must be cut several times before cutting.

638. How much is the contact depth between the cutter blade and the blade plate?

A: There are two situations when the cutter blade and the cutter blade are in contact when cutting: For the new blade, the contact depth of the cutter should be 0.2-0.5mm; for the cutter that has worn out the gap for a period of time Plate, can expand the range of contact depth of the knife to 1-1.5mm, not to insert the paper. Cut smooth prevail.

639. What is the role of the blade?

A: The cutting blade is also called knife blade. It is installed on the cutter plate under the cutter and cuts under the cutter.
The blade of the pad rests on the blade and acts as a cushion for cutting the paper without wearing the blade.

640. What kind of material is made of the blade?

A: The material used to make the blade is initially made of wood, such as beech wood; resin materials such as nylon are now used. Plastic plates, etc.; also made of gluewood. However, regardless of the kind, the hardness and elasticity should meet the requirements of the cutting blade.

641. What are the precautions for using the blade plate?

Answer: 1 The blade plate placed in the groove should be flush with the surface of the cutter, and it should not protrude or indent. When it protrudes, the blade can't push in. Affects the cutting quality; When the recessed paper roll is easily blocked by the groove surface or under the paper roll that finishes the cutting, convex indentation appears; 2 The blade plate should fill the groove and there is no gap with the groove to ensure the cushion knife The board does not move arbitrarily; 3 the blade board used should be flat, flat and free of warpage.

642. What are the ways of folding?

A: Although there are many kinds of folding methods, they are all based on the layout of the page layout, that is, how the typesetting should be folded, and the typesetting is based on the book binding format. The machine is designed for folding, such as plain and saddle stitching, with loose pages and no loose inserts.

643. How to use folded board when folding manually?

笞: The material of the folded board (referred to as the folded board) is made of bamboo and plastic, and is rarely made of metal plate. Its length should be determined by the size of the folded sheet. Generally, the length of commonly used 3-4 folds is about 250mm, and the length of a folded book is 150mm. A folded board with a width of about 30mm can be used. Both ends of the flap are rounded (to prevent loose-leafing) and the panel surface is smooth and smooth.

644. Vertical cross method manual folding two fold page how to place?

A: The vertical cross method is used to manually fold two folds into 4 pages of 8th edition. Pendulum: ~A`rt7 sets the maximum or minimum page number below the left hand top page, as shown in Figure 1.

645. Vertical cross method manual folding three fold page how to place?

A: When the vertical cross method is used to manually fold the three-folded page, it is 8 pages and 16 pages. The maximum or minimum page number of the swash plate position is placed below the left hand (rest) page, as shown in Figure 2.

646. Vertical cross method manual folding four fold page how to place?

A: The vertical cross method is manually folded. When folding, there are 16 pages and 32 pages. The maximal or smallest page number is placed under the second page of the left hand (rest), as shown in Figure 3.