At present, one of the biggest issues with the use of patterns is that the workers are not standardized in their operation. They don't know how toe dexterous when pulling out the patterns while using violence instead, didn't clean after using, and random stacking them. Many patterns were scrapped after a year which could have been used for many years.
For the use of patterns, most companies have express provision that unnecessary collisions and knocks must be avoided when patterns are modeling. And the patterns must be correctly placed or returned to the pattern cabin after using which standardized companies can do this.
Patterns management generally includes
1. Daily maintenance
2. Patterns number organization
3. Using records
4. Environmental control of pattern cabin
5. Placement of the deformable patterns
Casting patterns are required to be accurate in dimensions and cannot be bent or deformed. Therefore, in addition to carry out the rules when normal using and maintenance, the stacking and storage of patterns that are not in use should also be reasonable and safely placed. They should not be placed in open-air warehouses because they will crack, deform and decay when exposed to the wind, sun and rain. Normally, foundries should build model warehouses far away from the casting site, and the warehouses should be protected from rain and should be ventilated. And carry out modern management, the storage and exit should have ledger management to clearly record the specific location and easy access at any time.
Special personnel for safekeeping. The patterns receiving during production should go through the borrowing procedures, and repair them immediately after returning. The inventory patterns should be inspected every six months or once a year. The patterns must be overhauled regularly, and used patterns should have a base. The patterns in the base should be brushed with release agent and stored. There should be a logo in front of each piece. Just like a library, go through the formalities, borrow and return it, know who borrowed the pattern, and it can found when missing.
Establish a pattern base, pattern files, label on each pattern, write down the pattern numbers, the number of core boxes, etc., and managed by dedicated personnel.
In addition to the measures mentioned in pattern management, such as special-person management, establishment of accounts, registration of borrowing and returning, and identification, attention should also be paid to the establishment of pattern repair and process modification files. The relevant personnel should indicate the reason and sign on the record. This provides a basis for later process analysis and quality analysis, and also provides process parameters for making new patterns again.