Post Finishing Technology 1000 Questions (751-761)

751. What is a machine cross lock?
A: Machine cross locks, also known as jump locks or cable locks. Cross-locked books, the yarn position of each post is indirectly the same, single 1, 3, 5 and double number 2, 4, 6 signatures are alternating lock line form, as shown in Figure 2. Because the needle moves around the lock line, it is also called jump lock.

752. What does the machine cross lock work?
A: The machine cross lock consists of 1 active threading needle (live stitch needle), 2 hook needles (one threading needle on the left, 1 on the right) and 3 needles (3 needles) to form a group for sewing. of. The movable threading needle is moved reciprocally right and left under the drive of the draw plate (needle plate), and passes the yarn to the left and right hook thread needles to indirectly lock the book.

753. The automatic sewing machine consists of several units?
Answer: The automatic sewing machine is mainly composed of two units, the page-breaking machine and the sewing machine. The page-breaking machine is divided into two groups: multi-component posts and single-component posts.

754. What is the work process of the automatic sewing machine?
Answer: The pager deposits the post → Suckers → Posts → Blocks the post → Distributes the signature → Takes the post → Sends the post to the locks the line machine → Sends the post to pass the post → Positions the letter to match the post → Inserts the bottom needle to tie hole → Lead and thread → threading needle lead → hook claw (spool valve) with line transmission line → hook line hook cable line → coil tie → (switch) split unloading books, that is, complete the automatic sewing machine work process.

755. What are the operating requirements of the automatic sewing machine?
Answer: The store post is the operation that neatly puts the well-booked book in the post. The operation requirements: (1) Check the previous procedure for any unqualified products such as multiple posts, less posts, wrong posts, etc., and store them in the bucket after inspection without errors; (2) The height of the stock posts should be appropriate. Can not be too high, nor can not be connected to cause downtime.
The operating requirements of the automatic thread-stripping machine for squeezing and squeezing placards are the same as the operating requirements for the quilt-pulling stencils and stencils in the 731 and 732 questions, and are not described here.

756. What are the operating requirements for the automatic sewing machine?
Answer: The block posted by the post is blocked by the post rule so that it can be divided correctly. The operation requirements: (1) The height of the baffle should be properly adjusted to enable the accurate separation of the posts; (2) The height of the baffles should be parallel and consistent, and must not be skewed; (3) The fixing screws must be tightened and cannot be removed or removed.

757. What are the operating requirements for the automatic thread sewing machines?
A: Distributing posts means separating the remaining signatures from the inside creases so that the signatures can be placed on the tripod. The operation requirements: (1) The position of the two sub-suction nozzles should be relatively accurate; (2) The air volume of the two suction nozzles should be the same with the suction and degassing time; (3) When the suction nozzles of the sub-tie nozzles stop inhaling, they should be It is precisely the position of the booklet stably placed on the tripod.

758. What are the operating requirements of the automatic sewing machine?
Answer: The placard indicates that the signature is separated from the saddle and placed on the triangular transmission board so as to be transmitted from the stopper chain to the sewing machine section. Its operation requirements: (1) The position of the posts should be accurate, the position of the posts should be exactly the position where the crease rides on the tripod; (2) The time for the posts should be accurate, and the signature should fall exactly on the two stoppers. The chain is in the middle slightly forward position.

759. What are the operating requirements for the automatic thread sewing machine to send posts?
A: The post is sent by the sending wheel. Its operation requirements: (1) The time and position of the delivery must be accurate, and the reciprocating swing of the sending and stapling boards should be coordinated. When the backboard (depending on the table) is reset and the feeding chain board rack is in the same straight line position, It's just the time to post the post; (2) The speed of the post should be based on the thickness of the signature, the size of the page should be adjusted, not too fast, so that the signature is popped up or the entire post appears; it is also not too slow, resulting in a signature Can't send or send in place, signatures are missing, placards, tearing placards, etc.; (3) The distance between the upper and lower squeezing wheels is appropriate, the upper squeezing wheel is too high (distance is too large) to get up and send The friction of the poster wheel can not be sent out; the signature is too low to be squeezed by the wheel to cause the trace to break.

760. What are the positioning requirements for the signature?
Answer: There are two pull rules and two back gauges on the book, which are located above the board. Its positioning requirements: (1) The positioning of rules should be determined according to the length of the book format, and its position should be matched with the positions of the above-mentioned pinholes; (2) The position of the pull gauge should be able to pull the book in place; ) The rear buffer gauge and the front gauge must be on the same line; (4) After the front and rear gauges are adjusted correctly, it is necessary to stop and observe whether it is correct and correct before starting the lock line.

761. What are the operating requirements for automatic needle threading?
Answer: (1) The position of the bottom needle and the position of the threading needle (needle) and the hooking needle must be accurate. When the sewing needle and the crochet needle are dropped, they must be accurately pierced in the eyelet of the bottom needle; (2) The position of the bottom pin moves upwards so as to tie the folds of the book. It must not be in contact with the above pins. (3) A row of bottom pins must be in a straight line, and the hole in the bar must not be skewed. It should be accurate. Tied on the creases.


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