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GB/T 9352-2008: Plastic -- Compression moulding of test specimens of thermoplastic materials
Status: Valid GB/T 9352: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 9352-2008 | English | 174 |
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Plastic -- Compression moulding of test specimens of thermoplastic materials
| Valid |
GB/T 9352-2008
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| GB/T 9352-1988 | English | 239 |
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Plastics--Compression moulding test specimens of thermoplastic materials
| Obsolete |
GB/T 9352-1988
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PDF similar to GB/T 9352-2008
Basic data | Standard ID | GB/T 9352-2008 (GB/T9352-2008) | | Description (Translated English) | Plastic -- Compression moulding of test specimens of thermoplastic materials | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G31 | | Classification of International Standard | 83.080.20 | | Word Count Estimation | 9,911 | | Date of Issue | 2008-08-04 | | Date of Implementation | 2009-04-01 | | Older Standard (superseded by this standard) | GB/T 9352-1988 | | Adopted Standard | ISO 293-2004, IDT | | Regulation (derived from) | National Standard Approval Announcement 2008 No.12 (Total No.125) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the general principles and procedures for preparing thermoplastic molded specimen and specimen. Sample may be machined or stamped by the method is obtained from the specimen. In order to obtain a molded member having a repetitive four different cooling methods including major processing steps are standard. For each material, when molding the molding temperature and cooling methods need to be in accordance with international standards for materials, or by the relevant provisions in the interests of both parties agreed. Note: Not recommended thermoplastic reinforcements with this method. | GB/T 9352-2008: Plastic -- Compression moulding of test specimens of thermoplastic materials---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Plastic. Compression moulding of test specimens of thermoplastic materials
ICS 83.080.20
G31
National Standards of People's Republic of China
GB/T 9352-2008/ISO 293.2004
Replacing GB/T 9352-1988
Compression molding of thermoplastic plastic material samples
(ISO 293.2004, IDT)
Posted 2008-08-04
2009-04-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard is equivalent to ISO 293 use.2004 "Plastics --- thermoplastic compression molding sample preparation" (in English).
9352-1988 "thermoplastic compression molding sample preparation" This standard replaces GB/T . This standard and GB/T 9352-1988 Technical
The content of the only made editorial changes.
The standard proposed by China Petroleum and Chemical Corporation.
This standard by the National Standardization Technical Committee plastic plastic resins and petrochemical products Club (SAC/TC15/SC1) centralized.
This standard was drafted. Beijing Yanshan Petrochemical Branch resin Institute of Applied China, Sichuan University, Chenguang Chemical Research Institute Co.,
the company.
The main drafters of this standard. Chen would like, Mr Ng See Wang Jiandong, Zhang Changyi, Yu Yang, Miao Cuixia, Wang Xiaoli, Zhang Youling.
This standard was first published in 1988, this is the first revision.
GB/T 9352-2008/ISO 293.2004
Introduction
To make repeatable test results, we need to have a sample of a predetermined state. Compared to injection molding, compression molding purpose is to prepare a uniform and isotropic
Sex sample and the sheet by machining or stamping method may obtain a sample from the sheet.
In the compression molding process, the degree of mixing of the material occurs very small and could be ignored. Melted pellets and powder occurs only on the surface, pre-plastic sheet
(A mill sheet) is softened only partially.
Therefore, only when the molding material itself is homogeneous and isotropic, homogeneous and isotropic in order to obtain a sample. When processing more
Phase material (such as ABS), consideration should be given to maintain its internal structure.
GB/T 9352-2008/ISO 293.2004
Compression molding of thermoplastic plastic material samples
1 Scope
This standard specifies the sample preparation of thermoplastic molding and general principles and steps of the test piece, the sample can be machined or stamped
Obtained from the test piece.
In order to obtain a molding having repetitive include four individual cooling methods main processing steps are standard. For each
Materials required during molding mold temperature and cooling method should be in accordance with international standards related materials or by the relevant provisions of the interests of both sides agreed.
Note. Not recommended reinforced thermoplastic material by this method.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 3505-2000 Geometrical product specifications Profile method - Terms surface structure (GPS) surface structure, definitions and parameters
Number (eqv ISO 4287.1997)
ISO 286-1 Geometrical product specifications (GPS) --- ISO system of limits and fits --- Part 1. Tolerances, deviations and distribution
Co-foundation (1988)
3 Terms and Definitions
The following terms and definitions apply to this standard.
3.1
Warm-up and during the molding, the molding compound in the closest region of the mold or molding machine template temperature measured.
3.2
At the end of the cooling in the region closest to the mold plastic molding machine template or mold temperature measured.
NOTE. For non-overflow die, can be used to measure borehole temperature specified in 3.1 and 3.2 on the mold.
3.3
Contact pressure is maintained, the material inside the mold is heated to a temperature required for the molding time.
3.4
To maintain full pressure is applied at the time of molding temperature.
3.5
With a constant flow of cooling fluid cooling rate. The average cooling rate calculation. The temperature difference between the mold and the mold release temperature divided by
It cooled to a temperature required for the release time.
Note. The average cooling rate is usually ℃/min represents.
GB/T 9352-2008/ISO 293.2004
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