QUALITY INSPECTION AND TESTING OF HOUSEHOLD SEWING MACHINE

HEAD

MDM14B001MDM14B002MDM14B003MDM14B005

LABORATORY: A laboratory shall be maintained, which shall be suitably equipped and staffed, where different tests and inspections given in the specification shall be carried out according to the methods given in the specification.

All the testing apparatus shall be periodically checked and calibrated and records of such checks/calibration shall be maintained.

TEST RECORDS: All records of tests and inspection shall be kept in suitable forms approved by the Bureau. NOTE: The existing forms etc., as being maintained by the manufacturers may be retained. These forms, however, shall contain all the information required for operating this Scheme of Testing and Inspection. Copies of any records and other connected papers that may be required by the Bureau shall be made available at any time on request.

QUALITY CONTROL: It is recommended that as far as possible, Statistical Quality control (SQC) methods may be used for controlling the quality during production as envisaged in this scheme [See IS 397 (Part 1):1972, IS 397 (Part2):1985 and IS 397 (Part 3):1980]. In addition, effort should be made to gradually introduce a Quality Management in accordance with the Quality system Modules as per IS/ISO 9001 or IS/ISO 9002 or IS/ISO 9003 as appropriate to the activities of the organization.

STANDARD MARK: The Standard Mark(s) as given in column (1) of the First Schedule of the license shall be applied on the name plate of each sewing machine Head , provided always that the sewing machine head to which mark is thus applied conforms to every requirement of the specification. In addition, each sewing machine head shall be marked with the following: a) Name or trade mark; b) Name of model c) Serial number of the machine head to be engraved/punched on the bed plate and; d) SEWING MACHINE HEAD ONLY e) License number (CM/L No……….);  

LEVELS OF CONTROL: The tests as indicated in Table 1 attached and at the levels of control specified therein, shall be carried out on the whole production covered under this scheme and appropriate records and charts maintained in accordance with paragraph 2 above. On the basis of test results decision regarding conformity or otherwise of the control unit shall be taken. All the production,which conforms to the Indian Standard and covered by the license shall be marked with Certification Mark of the Bureau.   CONTROL UNIT: The number of sewing machine head of the same model and design manufactured in a day shall constitute a control unit.

The manufacturer shall submit and obtain approval of drawings for components keeping in view the requirements given in component specifications listed in Annex-B of IS 14769:2000. The grade of cast iron used in the body and other C.I. components shall be specified. Minimum of grade FG 200 of IS 210:1993 is recommended. Steels used shall conform to relevant component specification drawings. The sewing machine head shall be provided with provisions for lubrication as required in Cl.6 of IS 14769:2000.

WORKMANSHIP AND FINISH: Sewing machine head and its accessories shall be of rigid construction, neat in appearance and ready for use. They shall be free from objectionable vibration and shall be quiet in operation.

REJECTIONS: A separate record shall be maintained giving information relating to the rejection of production not conforming to the requirements of the specification and the method of its disposal. Such material shall in no case be stored together with that conforming to the specification.

SAMPLES: The licensee shall supply, free of charge, the samples required in accordance with the Bureau of Indian Standards (Certification)Regulations, 1988,as subsequently amended, from his factory or godowns. The Bureau shall pay for the samples taken by it from the open market.

11.0)REPLACEMENT: Whenever a complaint is received soon after the goods with Standards Mark have been purchased and used and if there is adequate evidence that the goods have not been misused, defective goods are replaced free of cost by the licensee in case the complaint is proved to be genuine and the warranty period (where applicable) has not expired. The final authority to judge conformity of the product to the Indian Standards shall be with the Bureau. In the event of any damage caused by the goods bearing the Standard Mark, or claim being filed by the consumers against BIS Standards Mark and not “conforming to” the relevant Indian Standard, entire liability arising out of such non-conforming product shall be of the licensee and BIS shall not in any way be responsible in such cases.

SUSPENSION OF MARKING: The marking of the product shall be stopped under intimation to the Bureau if, at any time, there is any difficulty in maintaining the conformity of their product to the specification, or the testing equipment goes out of order. The marking may be resumed as soon as the defects are removed under intimation to Bureau.   The marking of the product shall be stopped immediately if directed to do so by Bureau for any reason. The marking may then be resumed only after permission by the Bureau. The information regarding resumption of markings shall also be sent to the Bureau.

PRODUCTION DATA: The licensee shall send to BIS as per the Proforma to be authenticated by a Chartered Accountant or by the manufacturer by giving an affidavit/undertaking, a statement of quality produced, marked and exported by him and the trade value thereof at the end of each operative year of the license.

LEVELS OF CONTROL Other Components :For critical components, a single sampling plan

with inspection level IV and AQL 1% as given in IS 2500 (Part I):1992 shall be followed for visual and dimensional inspection. For other components, the single sampling plan with inspection level 4 and AQL 1% shall be followed. For inspection for hardness, the inspection plan with level 1 and AQL 1% shall be followed. For ready reference, the extract from IS 2500 (Part I):1992 of the above plans are given in Annex II.

Paint TEST: In case of unsatisfactory results, corrective action shall be taken and sample from each control unit shall be checked. Original frequency may be restored in case the samples taken from these consecutive control units satisfy this requirement.

Plating : In case plated components are received from outside, five random samples per consignment may be tested. The samples shall conform to the requirements for acceptance of the batch/consignment.

Accuracy requirements & Sewing requirements: In case both the machine head pass for all the requirements, the control unit shall be considered as conforming to the requirement. But, if any of the machine head fail in one or more than one requirement, then each machine head of the control unit shall be checked for these characteristics, in which failures have occurred and only the machine head conforming to these characteristics shall be considered as acceptable. However, corrective action shall be taken for subsequent production.

Durability Requirements: In case any of the machine head fails to meet the requirement of durability test, the failure shall be investigated and the corrective action shall be taken on the entire control unit. The control unit may be re-inspected for this test with double the number of machine head to be tested and it shall be marked if none of the machine head fail in any of the requirements.

THANK YOU