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PT. Gunung Putri Graha Mas
  English | Indonesia
FABRICATION METHOD
Whale FRP offers these fabrication methods :
1. HAND LAY-UP en
Hand lay-up is an open molding method suitable for making a wide variety of composites products including: boats, tanks, bathware, housings, RV/truck/auto components, architectural products, and many other products ranging from very small to very large. Production volume per mold is low and is feasible to produce substantial production quantities using multiple molds.

This production method offers low-cost tooling, simple processing, and wide range in part sizes. Design changes are readily made. There is a minimum investment in equipment. With skilled operators, good production rates and consistent quality are obtainable.en
• PROCESS DESCRIPTION
Gel coat is first applied to the mold using a spray gun for a high-quality surface. When the gel coat has cured sufficiently, roll stock fiberglass reinforcement is manually placed on the mold. The laminating resin is applied by pouring, brushing, spraying, or using a paint roller. FRP rollers, paint rollers, or squeegees are used to consolidate the laminate, thoroughly wetting the reinforcement, and removing entrapped air. Subsequent layers of fiberglass reinforcement are added to build laminate thickness. Low density core materials, such as end-grain balsa, foam, and honeycomb, are commonly used to stiffen the laminate to produce sandwich construction.en
2. SPRAY-UP en
Spray-up is an open mold method similar to hand lay-up in its suitability for making boats, tanks, transportation components and tub/shower units in a large variety of shapes and sizes. A chopped laminate has good conformability and is sometimes faster than hand lay-up in molding complex shapes. In the spray-up process the operator controls thickness and consistency, therefore the process is more operator dependent than hand lay-up. Although production volume per mold is low, it is feasible to produce substantial production quantities using multiple molds.en
• PROCESS DESCRIPTION
As with hand lay-up, gel coat is first applied to the mold prior to spray-up of the substrate laminate. Continuous strand glass roving and catalyzed resin are fed through a chopper gun, which deposits the resin-saturated "chop" on the mold. The laminate is then rolled to thoroughly saturate the glass strands and compact the chop. Additional layers of chop laminate are added as required for thickness. Roll stock reinforcements, such as woven roving or knitted fabrics, can be used in conjunction with the chopped laminates. Core materials of the same variety as used in hand lay-up are easily incorporated.en
3. FILAMENT WINDING en
Filament winding is an automated open molding process that uses a rotating mandrel as the mold. The male mold configuration produces a finished inner surface and a laminate surface on the outside diameter of the product. Filament winding results in a high degree of fiber loading, which provides high tensile strengths in the manufacture of hollow, generally cylindrical products such as chemical and fuel storage tanks, pipes, stacks, pressure vessels, and rocket motor cases.

The process makes the high strength-to-weight ratio laminates and provides a high degree of control over uniformity and fiber orientation. The filament winding process can be used to make structures which are highly engineered and meet strict tolerances. Because filament winding is automated, the labor factor for filament winding is lower than other open molding processes. en
• PROCESS DESCRIPTION
Continuous strand roving is fed through a resin bath and wound onto a rotating mandrel. The roving feed runs on a trolley that traverses the length of the mandrel. The filament is laid down in a predetermined geometric pattern to provide maximum strength in the directions required. When sufficient layers have been applied, the laminate is cured on the mandrel. The molded part is then stripped from the mandrel. Equipment is available for filament winding on a continuous basis and two axis winding for pressure cylinders. en
4. PULTRUSION en
Pultrusion is a continuous process for the manufacture of products having a constant cross section, such as rod stock, structural shapes, beams, channels, pipe, tubing, fishing rods, and golf club shafts. Pultrusion produces profiles with extremely high fiber loading, thus pultruded products have high structural properties.

The process is a continuous operation that can be readily automated. It is adaptable to both simple and complex cross-sectional shapes. Very high strengths are possible due to the fiber loading. en
• PROCESS DESCRIPTION
Continuous strand fiberglass roving, mat, cloth, or surfacing veil is impregnated in a resin bath, then pulled (pul-trusion) through a steel die, by a powerful tractor mechanism. The steel die consolidates the saturated reinforcement, sets the shape of the stock, and controls the fiber/resin ratio. The die is heated to rapidly cure the resin. Many creels (balls) of roving are positioned on a rack, and a complex series of tensioning devices and roving guides direct the roving into the die. en
RAW MATERIAL

Whale ® is very selective in using high quality resin and other FRP raw components to produce superior types of fiberglass tank and pipes. Whale ® product quality can safeguard against toxic or corrosive liquid substances, thus prevent bad impact to human and the environment. 


Whale® has maintained continuous communication with raw material supplier and thus can keep in touch with innovative technology production and prime quality materials to create specially designed strong and durable products.

Whale® is experienced in working with high quality resins from :

and reinforcement from

AWARDS AND CERTIFICATION
As testament to Gunung Putri Graha Mas' proven track record as an experienced and highly reliable manufacturer of FRP products, the company has over the years amassed numerous awards, distinctions, records and certifications. Foremost among these is the company's standing as the manufacturer of the world's largest FRP tank, formally recognised by the Indonesian Museum of Records and REBI.

Gunung Putri Graha Mas' recent awards, achievements and milestones include:

ISO Certification maintained since 1997
 
IREBI (Indonesian Business Record Certification) for World Largest Tank Project
 
American Composites Manufacturer Association Certification
Cover and Feature Story in Reinforced Plastics 50th Anniversary Edition
 
Indonesian Museum of Records Certification for World's Largest Tank Project
 
10 Year recognition from SGB