I give -up!

What are they?

Here is a link for a downloadable design manual you should be able to pick up something in here that will help you. If I am understanding you correctly. http://www.smc-alliance.com

Good Luck!

And another two for trouble shooting design problems.

http://www.ccponline.com

http://www.jetmoulding.com

SMC/BMC Mold Design Theory

Introduction: Concept of design – mould design principles – layout of impression - mould venting - mould alignment – mould location – mould clamping.

Selection of machines: Specifications of machines – types of machines - shot capacity – shot weight - plasticizing capacity – nozzle details – minimum daylight – maximum daylight – projected area – Injection pressure – Locking force – shut height - ejection arrangement – dry cycle time – methodical approach to mould design - deciding number of impressions – determination of economical no. of cavities.

Parting line/Parting surface: Types of parting surface - plain – stepped – irregular – local stepped and profile parting surface – complex edge form.

Ejection system: Types of ejection – pin ejection – stepped pin - part pin –"D" pin – blade ejection – sleeve ejection – stripper ejection – air ejection – double ejection – delayed ejection - calculation of ejection force required.

Mould temperature control: Types of cooling – Bolster cooling – integral cooling core/cavity – Insert cooling-core/cavity – Baffle cooling – Bubbler cooling – Deep chamber design - spiral cooling – cooling through heat pipes – capillary tubes- heat rods – mould temperature – melt temperature – heat removal rate – calculation of cooling time.

Feed system: Sprue, runner and gate – determination of runner-gate - size and cross section-layout of runners – balancing of runners – types of gates – application of gates to various products/materials – gate balancing.

Types of moulds: Two plate mould – single impression – multi impression – three plate mould – multi day-light mould – stack mould – runnerless mould – hot runner and insulated runner mould - split moulds – external undercut – internal undercut –finger cam, dog leg cam and cam track actuation – spring - hydraulic actuation - split cavities – split cores – threaded inserts – internal and external – standard mould bases – Calculation of strength of cavities – strength of guide pillar and support pillar requirements - Mould design check list.

Blow Mould Design & Extrusion Die Design

Types of blow moulds – extrusion – injection and stretch blow moulds – blow ratio – parison design – pinch off design – parting line – clamping force – mould venting, mould cooling – mould alignment – mould clamping. Extrusion Die Design: Basic concepts

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http://ameliahu.wordpress.com/2010/05/07/smcbmcdmc/