Technology

• THENSILE LOAD TEST MACHINE

  It is the equipment to test load (mechanical strength), toughness (durable nature) which can endure under practical condition where the fish hook is used. This experiment is to grasp the most suitable strength following the special character and shape of each fish hook for receiving stress when a fish is hooked to the fish hook, and to reflect its value to produce products of high quality. Also, the reliability (the error is ±0.0005) is not only considerably high, but also our company execute minute and scientific measurement in order to prevent delivery of defective products in advance through each exclusively using tensile load test machine following the distinctive feature by us age of fish hook as the following drawing.

  

• SALT SPRAY TEST MACHINE

  

  It's the machine to test corrosion resistance by spraying salt water on the surface of fish hook in accordance with the standard of ASTM B-Ⅱ7, and by setting the worst condition of high temperature and much moisture for accelerated life test in order to grasp corrosion resistance under the actual condition of fishing operation with our company's fish hook, the occurrenceand progress of corrosion is measured rapidly and correctly, as we can present positive and rational data against our clients' subjective and irrational claims, we can realze higher satisfaction of our clients.

  

• DIAMOND WHEEL CUTTNG MACHINE

  

  Compared with general products, collecting and working test piece of fish hook is very difficult due to its small size and its distinctive feature. Due to such reasons, the eqipment suitable for the distinctive feature of fish hook is required, so diamond wheel is fixed to out cutting machine which has super strong point in cutting even minute portion very cleanly in order to test the construction of fish hook.

• MICRO POLISHING MACHINE

  

  In observing with the microscope, this is the machine which polishes the section of cut test piece in order to carry out measuring hardness of fish hook easily.

• MOUNTING PRESS

  

  This is the machine to produce test pieces in order to grasp minute change of construction and hardness by cutting and compressing the section of fish hook in order to test the construction of fish hook.

• MICRO HARDNESS TEST MACHINE

  

  This equipment demonstrates superior performance in grasping defect and distinctive feature of fish hook which can not be confirmed only by naked eye, by reading value of the distinctive feature of forming strength and toughness of fish hook due to the dynamic portion of metal nature itself which can not be grasped by nakde eye. Our company uses this test machine aiming to give the most suitable strength by such equipment, beginning with analysis of cause of minute change of tensile stregth, and measuring hook-shaping of raw materials, before and after heat treatment, hardness of plating, hardness of point of fish hook and hardness by each category.

  Also, for the change of the raw material which is developed by the Development Team, plating, or change of heat treatment process, this is indispensable equipment with the microscope (Electronic Optical Microscope). With superior technical ability, our company has epoch-makingly improved manufacturing process considerably depending on manual work, and by providing mechanical mass production system and by securing consistency of produced products, we are supplying products of good quality at rational prices. The volition and resolution of YOUVELLA family refusing to stop reading customers' mind until satisfying clients is reflected.

• MICRO HARDNESS TEST MACHINE

  

  When a fish is hooked to fish hook, it will receive considerable load under several repeating pulling and releasing action, and the internal portion of the fish hook will receive continuous and severs stress, and eventually, breaking phenomenon may occur. The clients want the fish hook with strong durability, and in order to producesuch fish hook, it is impossible by general structure, so more minute and organicconstruction is required, and our company's micro hardness test machine and this equipment are indispensable equipments to frflect such clients' demand positively and scientifically to production.

  That is, it is the equiment to grasp the change of structure following mixing content of each element forming the internal portion of the fish hook, and just as the micor hardness test machine, it is the equipment which can measure even bending, distance and size between the structure, which occurs in the invisible portion of the fish hook.

  

• 	CARBURIZING STEEL	HIGH CARBON STEEL
  Object	It aims to improve the surface mature of mechanical parts which receive high stress such as shaft, gear, bearing, etc.	The quality of material being inclusively used for parts requiring high strength and high toughness such as shaft, supporting stand, piano line, etc. Forming nature adn welding nature is bad. (It shall be quenching treatment to improve forming nature.)
  Mechanical Nature	Cutting nature is inferior than that of high carbon steel. Tensile strength is low. (After forming fish hook, shape of point of others can be easily deformed before heat treatment	It is easy for cutting, cold, heat and plastic working. Tensile strength is high. (Contrary to low carbon steel.)
  Heat Treatment Method & Distinctive Feature	Carbon is forced to solve such as: 1. solid packed carbonizing 2. Liquid carbonizing 3. Gas carbonizing The surface is not clean. The quality of materal of thin diameter of line may have not toughness. (The depth of end of carburizing is generally 0.4-20.mm)	By the quantity of carbon which has quality of material, various heat treatment can be carried out. General Q/T (Oil, water, salt-possible) Various heat treatment such as marquenching or austemper is possible.
  Object	The brittleness may occur according to the quantity of carbon As it is diffused carbon forcibly, only the surface has strength	By the general heat treatment method (continuous furmace), decaburizing, decarborizing and oxidation may occurs.