What is ton capacity in injection Moulding machine?
The higher the press ton rating, the larger the machine. A machine rated for 68 tons can deliver 68 tons of clamping pressure. This pressure keeps the mold closed during the injection process. Too much or too little pressure can cause quality issues.
How do you calculate injection molding tonnage?
Now you can calculate necessary tonnage based on the projected area times the clamp factor for the material used. T = A x cf. For example, the projected area of the molded part is 150 sq/in times a clamp factor of 3 (tonnage needed/square inch from material data sheet). 150 x 3 = 450 tons needed.
How do you measure injection mold size?
Most injection molders will recommend 2.5 times the surface square inches of the part and an additional 10\% as a safety factor. If you have a part that is 120 square inches, you would need a press size with 300 tons of pressure.
What is runner weight in injection molding?
W= part weight (g), L= runner length (mm). If the material has glass fiber and carbon fiber reinforced LNP, composites. The cold runner sizes have to be 30\% to 60 \% larger than a runner for an unfilled material.
How is tonnage calculated?
For a stamping operation, knowing the press tonnage required to produce a part is essential….Rule-of-Thumb Calculations.
| Equation 1 estimate | Tonnage = 1 * 0.06 * 80 = 4.8 tons |
|---|---|
| Equation 2 minimum | Tonnage = 3.14 * 0.06(20\%) * 0.6(40) = 0.9 tons |
| Equation 2 maximum | Tonnage = 3.14 * 0.06(50\%) * 0.6(55) = 3.1 tons |
How is press tonnage calculated?
Material thickness, die-opening width, and the length of bend are all in inches.
- Forming tonnage = {[575 x (Material thickness squared)] /Die-opening width/12} × Length of bend × Material factor × Method factor × Multiple-bend tooling factor.
- Material factor = Material tensile strength in PSI/60,000.
How do you calculate tonnage?
Length in feet x Width in feet x Depth in feet (inches divided by 12). Take the total and divide by 21.6 (the amount of cubic feet in a ton). The final figure will be the estimated amount of tons required.
What is L T ratio?
What is the L/T ratio? Lung availability/total systemic availability; quantifies efficiency of aerosol drug to lung; L/T ratio=Lung availability/(Lung + GI Availability).
What is sprue in Mould?
A sprue is the vertical passage through which liquid material is introduced into a mold and it is a large diameter channel through which the material enters the mold. During casting or molding, the material in the sprue will solidify and need to be removed from the finished part.
What do you mean by tonnage?
Tonnage is a measure of the cargo-carrying capacity of a ship, and is commonly used to assess fees on commercial shipping. The term derives from the taxation paid on tuns or casks of wine. In modern maritime usage, “tonnage” specifically refers to a calculation of the volume or cargo volume of a ship.
What is Suez Canal tonnage?
marine. – Gross tonnage – Under vessel measurement rules of various nations, the Panama Canal and the Suez Canal gross tonnage is a measure of the internal volume of space within a vessel in which 1 ton is equivalent to 2.83 cub m or 100 cub ft.
What is press tonnage?
Tonnage is the peak load required during a stamping operation. The tonnage rating for a press refers to the peak load that the press can safely deliver without causing damage to the press frame, ram, bushings, etc. For a mechanical press, the peak tonnage is only available at the bottom of the stroke.
What is meant by tonnage of a mould?
Tonnage, as has been mentioned in other answers, is about the clamp force of the machine. The amount of pressure the machine can exert on the mould, to keep it closed, while mould (tool) is being filled with molten plastic under enormous pressure. Typically tonnage is the defining size of the machine.
What is the packing pressure of injection molding machine?
Injection Molding SIZING AN INJECTION MOLDING MACHINE Packing pressure ∼= 108Pa Clamping force F = P∗A Figure 7: Clamping force as a function of surface area. Note: logarithmic scales. Mold a single tensile bar – 50 ton machine Mold a front end of a car – 5000 ton machine “Typical” sizes are 100-1000 tons For complicated parts A = projected area 12
What is injection moulding and how does it work?
Injection moulding is the most common modern method of manufacturing plastic parts; it is ideal for producing high volumes of the same object. Injection moulding uses a ram or screw-type plunger to force molten plastic or rubber material into a mould cavity; this solidifies into a shape that has conformed to the contour of the mould.
Why do I need more clamp tonnage to fill a mould?
If the plastic material is very stiff, it will require more injection pressure to fill the mould, and thus more clamp tonnage to hold the mould closed. The required force can also be determined by the material used and the size of the part. Larger parts require higher clamping force.