There are two types of strippers: fixed or spring operated. The main function of these two types is to strip the workpiece from the cutting or non-cutting punch or die. The stripper that pushes parts out of the mold is also called stripper, inner stripper or ejector. In addition to its main function, the stripper can also press or clamp, position or guide plates, strips or workpieces.

Stripper (stripper)

There are two types of stripper plates: fixed and spring driven. For these two types, their main function is to strip the workpiece from the shearing or non-shearing punch (die). A stripper that separates a part of a die from itself is also called a stripper and has a built-in stripper or ejector. In addition, the stripper also plays the role of fixing device, thin plate, stripper and workpiece.

The stripper plate usually has the same width and length as the module. In a simple mold, the stripper plate can be fixed with the same screws and pins that fix the module, and the screw head will sink into the stripper plate. In more complex tools and modular modules, the module screws are usually reversed and the stripper plate fasteners are independent.

The stripper is usually the same length and width as the die. In some simple dies, the stripper plate may be fixed with the same screws and tenons as the module * *, and the head of the screw will be buried in the stripper plate. For some complicated tools and those combined punching dies, the screws are usually upside down, and the fasteners of the stripper are independent.

The thickness of the stripper must be sufficient to withstand the force required to strip the blank from the punch, plus the force required for the blank stripping channel. Except for very heavy tools or large blank areas, it is enough that the thickness of countersunk hole of screw head is in the range of 3/8 inch to 5/8 inch (9.5 mm-16 mm).

The demolder should have sufficient wall width to withstand the pressure required to demold the blank from the punch and the force required by any die channel. Unless it is a heavyweight tool or has a considerable joint part, the width and thickness of a flat hole drill with a screw head usually reach 9.5MM to16 mm. .

The height of the groove of the blank should be at least 1.5 times the thickness of the blank. This height should be increased if the raw material is to be lifted over the fixed pin stop. The width of the groove should be the width of the raw material belt, plus enough clearance to allow the change of the width of the cutting belt.

The height of the blank demoulding groove should be at least 1.5 times of the blank thickness. If the height of the blank exceeds the fixed locating pin (locating pin), the height should be increased accordingly. The width of the channel should be equal to the width of the blank belt, and sufficient allowance should be left to cope with the shear splines with different widths.

The selection of the method of applying spring to the stripper plate depends on the required pressure, space limitation, die shape, working properties and production requirements. Figure 9- 12 shows many such methods.

If the spring is to be applied to the tower plate of fractionator, the required pressure, space scale limitation, die shape, the nature and texture of the workpiece and the requirements of production specifications must be considered (all these factors will affect the selection and application of the spring).

Figure 9- 12 shows some corresponding application methods.

Since P.S. is not a related major, the translation of some professional words is somewhat biased, but it should be roughly the same from a grammatical point of view. You can make some corrections according to your professional knowledge.