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Material management systems are an integral part of SMT production and are critical to business decision makers and managers. Material management lies in the use of reasonable and effective methods. In the process of planning, implementation, checking and action management, materials can be supplied to the organization for production in accordance with the five principles of appropriate time, appropriate location, appropriate price, appropriate quantity and appropriate quality Items. In the production of SMT mounting processing workshop, the material management system mainly includes the following functional requirements. Next, FASTPCBA will give you a detailed introduction.

First, material management

1. Principles of SMT material management

A.First-in, first-out: The materials that are first stored in the warehouse are used firstly.

B. Timely and appropriate amount: master the timeliness of the various links in the warehouse and the appropriate amount of quantity.

C.The account is consistent: the daily entry and exit records are required to be consistent with the physical objects.

D. Daily inventory: Warehouse personnel must be responsible for themselves’ work every day.

E.management: Systematic and paperless management.

2. SMT material management method

A.Board management: The material information such as the material number, quantity, and date of entry is listed in the form of a table, and the board is placed on the end surface of the shelf.

B. Storage management: Place different materials in different areas of the shelf, that is, the storage area, fixed frame and positioning of the materials.

C. FIFO management: the first-in materials are put into use in the warehouse firstly, and the materials are marked with different colors in successive months.

D.Area management: Different areas are represented by different colors as the identification of different materials.

E.Management of defective products: The defective products are confirmed by the quality control personnel, and the labels are rejected, placed in isolation, and then returned to the defective product warehouse after processing.

F. MSD management: Because of the moisture absorber of the MSD component, it must be controlled according to its sensitivity level in the air, and fill in the "humidity sensor control label"

Second, the management of temperature and humidity sensitive components

1. Definition of temperature and humidity sensitive components

Electronic materials that are sensitive to temperature and humidity need to be defined by temperature and humidity sensitive components.

2. Sign recognition of temperature and humidity sensitive components

A.Labels for temperature and humidity sensitive components.

B.Packaging of the temperature and humidity sensitive components and the appearance mark of the body.

Third, the main points and methods of control of temperature and humidity sensitive components

1. Environmental control. The ambient temperature of the workshop is 18~28°C, and the relative humidity is between 40% and 60%. When stored, the relative humidity of the moisture-proof box is <10%, and the temperature is between 18~28°C.

2. Process control.

A. When the production line unpack vacuum-packed for moisture sensitive components, it is necessary to wear an electrostatic wristband or an electrostatic glove to open the vacuum packaging on a table with good static electricity protection. After unpacking, check whether the humidity card changes meet the requirements (according to the label requirements on the package).

B. When the production line receives the bulk moisture sensitive component, it is necessary to confirm whether the component is qualified according to the “Hyper Sensitive Component Control Label” and use the qualified component preferentially.

C. After the moisture sensitive component (IC) is unpacked, the exposure time in the air before reflowing shall not exceed the level and life of the humidity sensitive component.

D. For ICs that need to be baked and failed, hand it over to the quality control personnel for rejection and return to the warehouse.

Efficient, accurate and orderly material management is of great significance to ensure production schedule, complete delivery on time, improve customer satisfaction, and promote healthy development of the company.