Hapco Inc. - liquid plastics and dispensing equipment manufacturer.

HAPCAST 3731 All Purpose Casting System Thin Tooling compound

LOW VISCOSITY GOOD HEAT DISTORTION MACHINABLE VERY LOW SHRINKAGE FAST INEXPENSIVE

HAPCAST 3731 is a truly unique polymer alloy system, with the following features:

Can be used with a variety of curing agents to suit virtually every casting need
Small to large mass
Low to high temperature applications
Easily poured system
Short term exposure to 275°F and continuous service at 250° F
Easily machined with regular tools
Drilled, tapped, milled, sanded, ground, polished and turned in a lathe
Shrinkage as low as .00075 per linear inch can be obtained through proper selection of curing agent for any given mass. (See Hapcast 3731 curing agent chart)
Molds - both prototype and production molds can be made with
quickly and at low cost

Typical uses for HAPCAST 3731 are:

Molds for open cast plastics and urethanes
Compression molds
Prototype injection molds
Vacuum forming molds
Metal forming dies
Duplicate and master models
Keller models
Foundry patterns and match plates
Holding and assembly fixtures
Lay-up molds for reinforced plastics
Shoe molds
Pressure form molds
RIM molds
LPIM and LIM molds

Any of our curing agents may be used with HAPCAST 3731. (See Hapcast 3731 curing agent chart)

Typical Properties

Viscosity @ 25° C	4,500 cps
Hardness Shore D	88
Ultimate Compressive Strength	13,800 psi
Linear Shrinkage inch/inch	.00075 - .0015
Linear Shrinkage with conductites	.0005-.0010
Specific Gravity **	1.83-1.96
Color	Aluminum Grey
Machinability	Very good

* Properties may vary, depending on curing agent used. (Hapcast 3731 Mix Ratio Chart)

** Varies depending on curing agent used and mix ratio used

Directions for use

HAPCAST 3732 Our Best High Temperature Aluminum Casting System

UNIVERSAL HIGH HEAT DISTORTION HIGH HEAT TRANSFER EASY TO USE MACHINABLE FAST and INEXPENSIVE

Our best aluminum filled, all-purpose tooling compound.

A unique polymer alloy system, with the following new features:

Can be used with a variety of curing agents to suit virtually every casting need
Small to large mass, and low to high temperature applications
Short-term exposure to 400°F, and continuous service at 325°F is possible with this system
Increased service temperature will be realized over other casting systems.
Provides excellent heat transfer properties
Easily mixed and poured
May be used with all curatives all are non-staining
Non crystallizing
Liquid systems with unusually low mixed viscosities for easy mixing and pouring at room temperature
Parts are easily machined with regular tools
Can be drilled, tapped, sanded, ground, polished and turned in a lathe
Molds - both prototype and production molds can be made in several days
Fraction of the cost of metal tooling

Typical uses for HAPCAST 3732 are:

Molds for open cast plastics and urethanes
Compression molds
Prototype injection molds
Vacuum forming molds
Metal forming dies
Duplicate and master models
Keller models
Foundry patterns and match plates
Holding and assembly fixtures and lay-up molds for reinforced plastics

Any of our curing agents may be used with HAPCAST 3732. (See Hapcast quick selector chart)

Typical Properties

Viscosity @ 25° C	6500 cps
Hardness Shore D	88
Ultimate Compressive Strength	18,500 psi
Linear Shrinkage inch/inch	.00075 - .0015
Service temperature continuous intermittent	325°F 400°F
Specific Gravity **	1.65
Color	Aluminum Grey
Machinability	Very good

* Properties may vary, depending on curing agent used. (Hapcast 3732 Mix Ratio Chart)

** Varies depending on curing agent used and mix ratio used

Directions For Use

HAPCAST 3736 Steel Casting System

EXCELLENT MACHINABILITY HIGH DENSITY LOW VISCOSITY HOMOGENEOUS

HAPCAST 3736 is a room or elevated temperature curing, casting and tooling compound

Steel filled
Low viscosity
Excellent viscosity and high density
Good air release and good wettability of all surfaces
Very low shrinkage
Ensures the user of an exact reproduction of the original model
May be used in large castings
Provides excellent toughness, impact strength, and thermal conductivity

HAPCAST 3736 advantages

May be easily drilled, tapped, milled, sawed, etc., with regular metal working tools
For tough, high-density castings that can be used in high performance applications.
Easily mixed and poured
Non-staining
Non-staining curatives
Non crystallizing
Liquid systems with unusually low mixed viscosities for easy mixing and pouring at room temperature
Fillers stay in suspension, during curing process, insuring uniform density and mechanical properties

HAPCAST 3736 recommended use:

Metal and vacuum forming tools
Hammer forms
Drop hammer dies
Checking and holding fixtures
Core filling
Draw and stretch dies, etc.

Typical Properties

Viscosity @ 77° F	5,000 cps
Hardness Shore D	90
Ultimate Compressive Strength	24,000 psi
Linear Shrinkage inch/inch	.0005
Flexural Strength	13,500 psi
Specific Gravity **	2.0
Color	Grey
Machinability	Very good

* Properties may vary, depending on curing agent used. (Hapcast 3736 Mix Ratio Chart)

** Varies depending on curing agent used and mix ratio used

Directions For Use

HAPCAST 3738 High Density - Machinable

LOW VISCOSITY POROUS FREE CASTINGS EXCELLENT MACHINABILITY HIGH STRENGTH

HAPCAST 3738 features:

Black, high density, machinable, easy-to-pour, rigid, thermosetting system.
Compatible with a variety of HAPCO curing agents, allowing the system to be customized to the application.
High specific gravity for aiding in porous free castings.

The system exhibits good impact making it a good choice for casting applications:

Molds
Models
Patterns
Tracing masters
Mandrels
Fixtures
Dies

HAPCAST 3738 may be used with or without a HAPCOAT surface coat.

Typical Properties

Viscosity @ 25° C	9,000 cps
Hardness Shore D	85-90
Ultimate Compressive Strength	16-18,000 psi
Linear Shrinkage inch/inch	.001
Specific Gravity **	2.5
Color	Black
Machinability	Very good

* Properties may vary, depending on curing agent used. (Hapcast 3738 Mix Ratio Chart)

** Varies depending on curing agent used and mix ratio used

Directions For Use