We are dedicated to make the quality cap mould with mould steel ,P20,H13 and S136 .and our cap mould includes:
hinged closures mould
yorker spout mould
disc-top cap mould
flip-top cap mould
push-pull cap mould
twist open/close cap mould
flapper closures mould
How to design screw on a bottle flip top cap,lid and closure mould
Undercuts on the Inside of the cap
Undercuts on the Inside of the cap are usually
• Inside threads,
• snap-on ribs (for cap, closure or lids of containers), or
• major undercuts that are part of the product shape.
Inside Threads on cap
Inside threads usually occur in cap but also may be designed in many technical products such as plastic pipe hardware, etc.
The planned method of manufacture (molding, or machining after molding) should be considered.
The cap mould could be much simpler (and considerably less costly) if the cap is threaded after molding; the designer should be aware of the production quantities required.
As we stated before，it is more important to arrive at the lowest total cost product than at the most elegant method of manufacture.
If the thread must be molded, we again have two choices of how to remove the product from the core: by unscrewing or by stripping.