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ECO 032:2020
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Yung Kong Metal Works Co. Bhd. had obtained her first certification of Quality Management System in 2020. 2 years later, this certification was upgraded to ISO 9001:2000.  In 2010, with the release of new revision of ISO 9001:2008, the organization had managed to upgrade her certification as well. Our path of ISO 9001 does not stop at here.  Yung Kong Versatile Fence Sdn. Bhd. had joined to this family after receiving her first ISO 9001 certificate in 2012.  Today, there are 3 companies certified to ISO 9001:2015 including Yung Kong Wire Industries Sdn. Bhd.

Our steel fabric, YMC® has been certified by SIRM QAS International since 2005, complied with Malaysian Standard MS 145:2001. It has been further awarded by CIDB as certified product in 2014. Within 16 years, this product certification has been going through 2 major upgrades to MS 145:2014.

To maintain this certification, we put our best effort in ensuring quality of YMC® is always meeting the requirements of its newest revision of Malaysian Standard. This has been done through quality inspection on raw materials, during manufacturing process, and finished goods.
Besides, samples are taken from production for laboratory test every day to ensure the mechanical properties of products are complying with standards. Equipment used for testing are calibrated within designated interval to confirm their fitness of measuring. All test data are kept in system to maintain the traceability of products.

Certificates and licenses of YMC® will be renewed annually after passing the audit and laboratory test of SIRIM and CIDB.

[pdf id=’3284′]

Roundness Inconsistency

For ribbed wire: Wire not round in shape (triangle in shape)

 

YHP-R4.5: diameter: x-axis = 4.42mm; y-axis = 4.49mm;

(x – y) = 0.07mm; (x – y > 0.05mm, not acceptable)

Defect Description

  • Oval in cross-sectional dimension. Wire shows oval shape instead of round in cross-sectional dimension.
  • Apply to all steel wire in coil: (ribbed wire: YHD, YSF & YMC; round wire: YHP, YHM, YRC, YCV & YMB)
  • For ribbed wire: Checking by using Roundness Device. Take the photo for the round surface, compare the sample surface with a circle surface.
  • For round wire: Check by using micrometer. Measure the diameter of x-axis & y-axis. Find the difference between these 2 diameter (x – y).

Root Cause

For ribbed wire:

  • RR or PR roller not in good alignment
  • Bearing loose or broken
  • shaft wear & tear
  • Poor roundness of raw material

For round wire:

  • Die wear & tear
  • Poor roundness of raw material
  • Poor installation/ adjustment of oval sizing roll (CA)
  • Wear & tear of CA rolls or cassette roll

QC Criteria

For ribbed wire:

  • Compare the coverage of sample with standard circle, if there is small gap between the standard circle & sample, it is considered pass. If the gap between the standard circle & sample is big & obvious, it is considered not round.

 

For ribbed wire:

  • (x-y) less or equal to 0.05mm

Action

Action for root cause (for ribbbed wire):

  • Machine adjustment by dismantle & re-adjust the roller position
  • Part replacement for bearing and shaft or repair shaft
  • Checking roundness of raw material during receiving process to make sure it is within our control

Action for root cause (for round wire):

  • Die replacement
  • Checking roundness of raw material during receiving process to make sure it is within our control
  • Regrind or replace the CA roll or cassette roll

Action for output:

  • Downgrade the item
  • Used for other product
  • Consult marketing personnel
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