JLS – ‘punching above its weight’… with its tungsten and carbide mould components….and more!

Dongguan JLS Precision Mould Parts Co Ltd is an experienced producer of tungsten and carbide mould components and other related products. Established for 20 years, the business – this recent IMD online member – serves a range of industries including automotive; metal stamping, plastic mould die makers and tool designers. JLS supports its customers with high precision and quality products, in step with impressive timeline delivery, and competitive pricing and always aims to be highly responsive to product delivery in step with any specifically submitted customer drawings 


The company always imports quality materials to ensure its products achieve accuracy and meet demanded  close tolerances in all respects.  These carefully selected quality products includes the certified tungsten carbide products obtained from reputable, expert companies.  The JLS tungsten carbide used in its projects is always of  specific hardness and is thus outstanding in terms of its wear durability and corrosion resistance These factors are ‘a must’ in order to meet  specific testing client demand. Here below the JLS experts highlights in its online blog  aspects of the important Punch and die process……..

cost effective 

Nowadays, Punching is usually the most cost effective method for creating holes in sheet metal materials from medium to high production volumes. The process, when a specially shaped punch is used to create multiple usable parts from a sheet of material is known as blanking. In metal forging applications the work is often punched while hot, and this is called hot punching. Slugging is the punching in which punch is finished as soon as the metal fracture is complete and metal is not removed, but still held in hole. 

shearing forces 

Punch and die is often made of tungsten carbide (tungsten carbide punches and dies) or hardened steel. A die is located on the opposite side of the work piece and supports the material around the perimeter of the hole and helps to localise the shearing forces for a cleaner edge.

There is a small amount of clearance between the punch and the die to stop the punch from sticking in the die and so less force is needed to make the hole. The amount of clearance needed depends on the thickness, with thicker materials requiring more clearance, but the clearance is always greater than the thickness of the work piece. 


The clearance also depends on the hardness of the work piece. The punch press forces the punch through a work piece, producing a hole that has a diameter equivalent to the punch, or slightly smaller after the punch is removed. All ductile materials stretch to some extent during punching which often causes the punch to stick in the work piece. In this case, the punch must be physically pulled back out of the hole while the work is supported from the punch side, and this process is known as stripping. The hole walls will show burnished area, rollover, and die break and must often be further processed. The slug from the hole falls through the die into some sort of container to either dispose of the slug or recycle it.

tool technology

Dongguan JLS Precision Mold Parts Co.,Ltd has been devoted to the manufacturing of customised tungsten for almost 20 years. Our products have been exported to Japan, Germany, France, United Kingdom, etc. We understand that 100% accuracy, unbeatable service and rapid delivery saves our customers’ time and money. Our tool makers are highly trained and we utilise the best machine tool technology to produce the best possible tooling for our customers.