Process Technology Control of Batch Product Quality (I)

The production process of books and publications is: type sheet - printing - printing - binding.

In order to ensure the improvement of product quality, in the process of product printing, we will do a good job of on-site resolution of process management, process quality control and process quality problems, so that personnel, equipment, raw and auxiliary materials, methods, and environmental factors that affect product quality are always Being in a controlled state is an important condition and guarantee for the improvement of the overall product quality level. Therefore, in the production process, it is necessary to carefully analyze the factors affecting the quality of each process. It is of great significance to actively take measures to improve the quality of books and periodicals, improve the economic benefits of enterprises, and enhance the core competitiveness of enterprises. .

First, we must pay attention to strengthening the source control of product quality

Only the strict control of the quality of raw materials can ensure the quality of books and periodicals. We know that the quality of raw materials directly affects the processing quality of books and periodicals. It can be said that raw materials are the source of quality control of books and periodicals and are very important.

Materials include printing materials and binding materials such as raw materials and accessories, mainly refers to films, plates, paper, ink, blankets, hot melt adhesives. The quality of raw and auxiliary materials will directly affect the quality of books and printed products. If the quality of raw materials is too poor, it will lead to "embroidery sacks embroidered and the background is too poor." Film quality should pay attention to uniform film, black solid meet the requirements. The plate (PS plate) substrate should have good hydrophilicity, and the photosensitive coating must have strong adsorption capacity, and be even and smooth. After exposure and development, there should be no smears and the stability of the batch is better.

For paper, pay attention to the flatness, surface strength, water absorption, ink absorption performance, whiteness, etc., use less "hot pan paper" to avoid loading edges, tight edges, and dead folds; avoid translucent shadows, print-through, hair loss Dropping powder pile rubber etc.; if the hair off powder, not only seriously affect the quality of the product, but also increase the speed of the plate, reduce the life of the plate, and increase costs.

For web, pay attention to tensile strength, uniform rewinding, consistent tension, etc., avoid uneven tension or rewinding and produce “run-out” phenomenon, resulting in inaccurate registration, or insufficient tensile strength resulting in breakage packs. Rubber, crushed rubber blankets and so on. Blanket should pay attention to elasticity and recovery, ink should pay attention to water resistance, adhesion, dryness, blackness, viscosity and so on.

Binding materials should pay special attention to the quality of hot melt adhesives, and some hot melt adhesives are too brittle and some drawing should be serious. If the quality of hot melt adhesives is not good, it may cause loose sheets and cause unqualified batch products. Therefore, when purchasing raw and auxiliary materials, we must strictly check and compare with the quality. Only by making good materials available can we ensure product quality.

In addition, the proper storage of raw materials will also affect the processing quality of books and publications. For example, paper acceptance, temperature and humidity, and the environment in which they are stored will directly affect the physical properties of paper, resulting in diminished printability. Will affect the quality of books and products. Therefore, according to the actual situation of the enterprise, it is necessary to purchase some necessary inspection instruments and carry out inspection and acceptance according to the quality standards of raw materials. It is worthwhile to carry out effective inspection, control, and safekeeping of the raw materials that have been put in storage.

Through the implementation of inspection and control measures, enterprises can make scientific and accurate detection of the quality of raw materials, fundamentally eliminate unqualified raw materials, ensure the processing quality of books and periodicals, and effectively control the source quality of production.

Second, we must pay attention to the printing technology of good products

Process Technology Control:

The modern printing process presents a very unstable situation, and there are three reasons for this:

1. The continuous updating of printing equipment has prompted the printing industry to constantly change its production process to meet the needs of technical equipment;

2. With the increasingly fierce competition in the book and book printing market, new, strange and special designing concepts of book publications are constantly appearing in the form of books. This brings new requirements to the printing process and increases the difficulty of the process. Process design work must be done by professionals, and to do fine, do a good job. Its task is to make detailed arrangements for each detail from the choice of materials, materials, to finished products, and to understand what kind of process quality problems are likely to arise. Its role is to reduce the consumption of raw materials; second is to reduce the occurrence of quality accidents and eliminate quality accidents before production.

3. Changes in the distribution and sales markets, the diversity of market demands, and the improvement of the aesthetic capabilities of readers have made publications more demanding on packaging and decoration. Publishing units are striving to improve processes, increase process design, clarify the tasks of process design, and become books and publications. An important task. (To be continued)