CLASS 104 MOLD SPECIFICATIONS

CAVITY AND CORES

CLASS 104 MOLD SPECIFICATIONS

Cycles: Under 100,000

Description: Low production mold. Used only for limited production preferably
with non-abrasive materials. Low to moderate price range.

GENERAL INFORMATION

UP to 100,000 lifetime cycles is expected from this mold.

Mold shall produce acceptable parts at or below target estimated molding cycle as supplied by Tooling Engineer.

Mold shall be built to produce 1.33 Cpk quality parts minimum.

Approved shrink factors for the selected plastic molding material shall be supplied by Tooling Engineer and documented in writing.

Engineering shall supply IGES/CAD files for part dimensions, part prints, and approved title block upon release of purchase order.

Tooling Engineer shall supply molding machine platen layout and ejector KO pattern in writing.

Preliminary mold design shall be approved by Tooling Engineer prior to start of mold construction.

Basic mold design shall be supplied to after tool approval.

All screws, bolts, leader pins/bushings, ejector pins, ejector blades, etc. shall be standard stock items wherever possible.

MOLD BASE

Mold base may be of mild steel material

All steels moving against one another shall be of a dissimilar material and shall have a hardness differential of at least 4-7 Rockwell "C".

Eye bolt holes shall be located on all four sides and both halves of the mold.

Mold base must have 4 inch diameter locating ring and 1/2 inch spherical radius sprue bushing, unless otherwise specified by Tooling Engineer.

All mold base plates to be chamfered and de-burred.

Mold to have ample support pillars.

Pry bar slots shall be located on all mold base plates.

Stamp "TOP" on top of mold, minimum of 5/16 inch high.

Leader Pins and Leader Pin Bushing shall be long enough to engage prior to any other mold components.

Mold base shall have clamp slots in both halves of mold. Preferred dimension of clamp slot is 13/16 inch high X 5/8 inch deep where possible, 7/8 or 1 3/8 off top and bottom of mold. Direct bolting holes may be implemented if necessary.

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CAVITY AND CORES

All molding surfaces shall be made of pre-hardened tool steel or tool grade aluminum approved by Tooling Engineer.

All mold details such as slides, heel blocks, gibs, wedge blocks, etc. shall be made of pre-hardened steel.

Leader pins shall be long enough to engage before cores engage.

Part undercuts may be formed with hand loaded inserts, or may be formed as a manual secondary operation.

Venting is required to properly fill part

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COOLING

Water lines shall be in both mold halves.

Water inlet and outlet locations shall be positioned so as not to interfere withmolding machine tie bars and mold clamp slots.

All water inlets and outlets shall be stamped and identified on mold base. Identify inlets as "IN 1", "IN 2", etc. Identify outlets as "OUT 1", "OUT 2", etc.

All water inlets and outlets shall be fitted with approved vendor disconnect fittings.

Water lines shall be 7/16 inch diameter or larger wherever possible.

Bubblers and baffles shall be stainless steel or brass.

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EJECTION

Ejector plate travel must be sufficient for full part removal.

Ejector pins and sleeves shall be industry standard sizes wherever possible.

Contoured ejector pins located flush with core surfaces must be keyed into place to maintain core contour alignment.

Knock-out clearance holes shall be 1.25 inch diameter. Tapped holes for knock-out pins/adaptors shall be 1/2 inch-13 thread size.

Standard SPI knock-out patterns shall be used. Tooling Engineer to provide mold supplier appropriate KO pattern to match molding machine configuration.

All ejector plates shall have return springs where mold design and mold operation allows.