Date stamp is an injection mold component used for traceability of plastic items such as automotive parts, plastic toys etc... It is a cylinder shape metal and composed of an outer ring and an inner arrow. The inner arrow can turn to indicate different positions of a character on the outer ring. The mark of a date stamp looks like a clock with characters to show such as manufactured date, lot numbers and types of plastic material etc... Date stamps mark during injection process so it is an easy and cheap way to directly mark on plastic products.
Uratani Shoji co., ltd. has been manufacturing a variety of high quality date stamps for more than 30 years.
Date stamp is inserted in an injection metal mold and marks during injection process. Indication of the mark can be changed by turning the inner arrow with a screw driver.
Manufactured date is marked for traceability control of a product.
Lot number is marked to indicate different production line, manufactured country and color of the products etc..
Material type is marked when different material is used with the same mold.
Quality of date stamp is necessary to keep production line without stopping. We introduce four important factors you need to know. Uratani have been manufacturing a high quality date stamps to achieve those functions.
Oil (e.g. lubricant) may flow into the date stamp and make it harder to turn.
The huge problem occurs if the inner arrow come off during the injection process.
The inner arrow with year displayed needs to be exchanged every year.
The inner arrow need to points directly to each characters without rotating during an injection process.
We have 5 different date stamps depending on its function. Please see below to find the date stamp you would like to use.
|Display||How to insert||How to replace|
|OP type, W type
Length, display mark, depth of engraving are able to change depending on customer`s request.
When a date stamp is hard to turn, please clean inside by a mold cleaner.