ASTM D955-08 PDF
Scope: Mold shrinkage is the shrinkage of the polymer as it cools after the molding process. It is typically used to properly machine injection molds so that final. Purchase your copy of ASTM D – 08() as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards. Buy ASTM D R TEST METHOD OF MEASURING SHRINKAGE FROM MOLD DIMENSIONS OF THERMOPLASTICS from SAI.
|Published (Last):||13 October 2012|
|PDF File Size:||7.92 Mb|
|ePub File Size:||16.20 Mb|
|Price:||Free* [*Free Regsitration Required]|
This standard is also available to be included in Standards Subscriptions. Standards monitoring is a free service designed for you who wish to be alerted of changes to or new editions of the standards required in your work.
Note This test method is technically identical to ISO where Type D2 specimens are used except that pressure transducers are an option in this test method and required in ISO Record these values as l and w, respectively. The parts cool and after 48 hours, the molded parts are measured and the shrinkage is calculated.
D – D Signicance and Use 5. Repeatability under such circumstances was not evaluated. You need to log in before adding standards to the monitoring service. Collect samples after the machine is at equilibrium. Please first verify your email before subscribing to alerts.
To request a quote for this test or others Click Here. November 1, 1 Completed ve year review. Mold shrinkage can be dependant upon the molding parameters used – often the extremes of the processing range for the material plus a midrange value are tested.
Intertek PTL molds for a d9555-08 x 5″ x 0. This ensures that you are always up-to-date and saves astk both time and money.
ASTM D – Standard Test Method of Measuring Shrinkage from Mold Dimensions of Thermoplastics
You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server.
Due to copyright restrictions, we are not able to provide copies of standards. This standard and ISO are equivalent in the design of specimen D2. Users of this test method should apply the principles outlined in Practice E to generate data specic to their laboratory and materials, or between specic laboratories.
The minimum hold time x955-08 be read from the decrease of the cavity pressure to zero. It is the intent of this method to control and document as many of these variables as possible.
Mold shrinkage is calculated as inches per inch or percent or mm per mm for the specified astj and conditions. Link to Active This link will always route to the current Active version of the standard. As the cooling rate of the material is proportional to the square of the reciprocal of the thickness, the minimum cooling time for the cavity can be expected to be close to 1. The molding is done by an approved outside source. The correct change-over point shall therefore be adjusted individually for each value of the injection speed and for each material under test.
The mold shall have at one end a gate 6.
ASTM D955 – 08(2014)
There are no recognized standards by which to estimate the bias of this test method. A web subscription provides an easy and secure access to standards, and you are guaranteed to always have the latest edition. Calculation e955-08 Report Determination of Moulding Shrinkage 3. The moment new editions of the standards you monitor are released, changes are made, or appendixes are published, you will be alerted by email. Start Webshop Product catalog Product astj. Monitoring Standards monitoring is a free service designed for you who wish to be alerted of changes to or new e955-08 of the standards required in your work.
The thickness shall be 3. Factors such as mold and melt temperature, fill times, and packing conditions are known to affect shrinkage significantly. Your Alert Profile lists the documents that will be monitored.
It is the responsibility of the user of this d955-088 to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Consequently, there may be signicant differences when measuring the specimen at different points around the circumference. We have no amendments or corrections for this standard. Historical Version s – view previous versions of standard. The temperature of the heating cylinder and the mold shall be maintained at a point which, on a cycle selected, will produce temperature within the range recommended by the material molding standard.
Each material was supplied in granular form to each of the testing laboratories by a single supplier.
Mold Shrinkage ASTM D ISO
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Current edition approved Nov. You may delete a document from your Alert Profile at any time.