Custom molds and molded plastic parts—from tooling to finished-part delivery.
GPT Precision manufactures complete injection molds and custom plastic components to your specifications. We coordinate tooling, mold trials, injection molding, finishing and assembly around your part design, material requirements and production needs.
Whether you need a complete mold for your own production facility or finished molded components, we review the geometry, material, expected demand and acceptance requirements to define the manufacturing approach.
For customers who need a mold for production at their own facility.
We manufacture the mold, carry out trials and provide samples for customer review. After sample approval and the agreed acceptance checks, the mold is prepared for shipment.
The tooling review covers the target molding machine, mold dimensions, cavity arrangement, mold construction and required documentation.
For customers who need molded parts supplied to their drawings.
The project can include mold manufacture, trials, plastic-part production, finishing, assembly and inspection. Critical dimensions, cosmetic surfaces and assembly requirements guide the sampling and production process.
For molded-part projects, the quotation defines the proposed mold-life target in production cycles. Mold construction, selected steel, resin characteristics and agreed maintenance conditions are considered when establishing the tooling requirements.
Part geometry influences mold construction, material flow, cooling and ejection. Reviewing these relationships early helps identify manufacturing concerns while retaining the features essential to the finished part's function and appearance.
Review wall sections, thickness changes and internal radii for potential filling, shrinkage, sink marks and warpage.
Identify where geometry adjustments could improve molding consistency without compromising the required part function.
Evaluate draft angles, release direction and undercuts alongside the required part features.
These details influence side actions, ejection methods, mold complexity and tooling cost.
Consider reinforcing ribs, mounting bosses, snap fits and locating features together with the surrounding walls and mating components.
Feature dimensions and their relationships influence molding behavior, assembly fit and functional performance.
Plan gate positions, parting lines and ejector locations around visible surfaces and critical interfaces.
Coordinate texture, polish and acceptable molding marks with the mold design before tooling manufacture.
Engineering priority: Identify critical dimensions, datums, mating interfaces and cosmetic surfaces before tooling begins. Tolerance feasibility is reviewed against the selected resin, part geometry and intended function.
Tooling investment should reflect the design's maturity, initial order quantity and expected demand.
Mold construction, cavity count, resin requirements and molding-machine compatibility are evaluated together to establish an appropriate production approach.
| Tooling Approach | Intended Use | Main Considerations |
|---|---|---|
| Prototype Tooling | Molded samples and early design evaluation | Trial quantities, material requirements, design flexibility and initial tooling investment |
| Bridge Tooling | Initial orders or an interim production requirement | Near-term demand, required tool life and the transition to ongoing production |
| Production Tooling | Established designs with recurring production demand | Cavity configuration, durability, consistent output, maintenance and expected production life |
The appropriate tooling arrangement is determined by the project requirements. Prototype and bridge tooling are evaluated where applicable and do not automatically imply availability for every order quantity.
Produce one part per cycle. A single-cavity arrangement may be suitable when a simpler mold construction meets the required output and part specifications.
Produce multiple copies of the same component per cycle. Cavity balance, filling consistency and the required production output are considered during mold design.
Produce different related components within the same molding cycle. Part geometry, material compatibility, filling behavior and the required quantity of each component influence the suitability of a shared mold.
The proposed mold-life target is established according to the mold construction, steel grade, resin, production requirements and anticipated maintenance conditions.
Tooling specifications and acceptance requirements are agreed as part of the project scope.
Different part requirements may call for different tooling arrangements, molding techniques or material combinations.
Custom housings, covers, clips and functional plastic components manufactured using suitable thermoplastic resins.
Part geometry, material selection, dimensional requirements and production demand guide the molding approach.
Mold arrangements for producing multiple identical parts or different related components.
Cavity configuration, filling balance and production quantities guide tooling selection.
Metal threads, bushings, contacts and other inserts incorporated into a molded plastic body.
Tooling review addresses insert positioning, retention, dimensional relationships and exposed functional surfaces.
An additional material molded over a substrate to create grips, protective surfaces or other functional features.
Material compatibility, bonding or mechanical retention and interface design determine the appropriate construction.
Custom LSR components and complete LSR molds for applications with specified flexibility, sealing or temperature-performance requirements.
Material grade, part geometry, tooling design and acceptance requirements are evaluated for the intended application.
Material selection connects the part's operating environment with its geometry, dimensional requirements, surface appearance and manufacturing conditions.
| Material Group | Common Materials |
|---|---|
| General-Purpose Plastics | ABS, PP, PMMA |
| Engineering Thermoplastics | PC, POM, PBT, PA66, PET |
| High-Performance Thermoplastics | PPS, PEI, PEEK |
The specific resin grade, fillers, additives and color are reviewed against the component's operating conditions, mechanical requirements, geometry and intended use.
Processing suitability and equipment requirements are confirmed for the selected material and grade.
Additional material consideration: PTFE may be supplied through a separately evaluated manufacturing route. It is not processed through conventional thermoplastic injection molding.
Commonly considered mold steels include:
P20 · ASSAB 718/718H · 8407 · NAK80 · H13 · S136 · 1.2738 · 1.2344
Mold steel selection takes account of the resin, tool construction, expected production life, surface requirements, wear resistance and maintenance considerations.
Specific steel grades, heat-treatment conditions and acceptable substitutions are confirmed against the agreed tooling specifications.
Define the required texture, polish and color together with the visible and functional surfaces of the molded part.
Where applicable, provide SPI, VDI or other agreed surface-finish references. Identify acceptable locations for parting lines, gate evidence and ejector marks.
Include printing, marking, coating, joining or assembly requirements in the finished-part specification.
Physical reference samples can help establish appearance expectations when cosmetic consistency is important.
Review the 3D model, drawing revision, material specifications and expected demand.
Identify moldability concerns, critical features, cosmetic requirements and the proposed tooling and supply scope.
Develop the cavity arrangement and mold construction around the agreed part revision and tooling requirements.
Manufacture the mold using the applicable CNC machining, EDM, finishing and assembly operations.
Produce initial molded samples and evaluate dimensions, appearance and relevant assembly or functional requirements.
Trial findings may identify the need for tooling adjustments, molding-process changes or additional sampling.
Provide molded samples and the agreed inspection information for customer evaluation.
Review dimensions, appearance and relevant functional requirements against the specified drawing revision and acceptance criteria.
Any required corrections and additional trials are addressed before production release or mold acceptance.
Proceed with molding according to the approved requirements, followed by the specified finishing, assembly, inspection and packaging.
Complete the agreed mold acceptance activities and prepare the accepted mold and required documentation for shipment.
Inspection records, tooling documentation and other final deliverables are defined according to the project requirements.
Custom enclosures, equipment covers, protective shells and other structural or cosmetic plastic components.
Engineering focus: Mating edges, mounting bosses, access openings, alignment features and visible surfaces.
Snap-fit components, locating elements, mounting parts and other molded features used to connect, support or position assemblies.
Engineering focus: Fit, retention, feature flexibility, dimensional relationships and assembly requirements.
Plastic parts combining metal inserts, embedded functional elements or additional molded material regions.
Engineering focus: Insert retention, material compatibility, interface geometry and loads experienced during assembly or use.
These are representative component categories. Manufacturing suitability is evaluated against the specific drawing, material and application requirements.
Yes. We manufacture complete injection molds for customers who intend to operate them at their own production facilities.
Mold-only projects can include mold manufacture, trials, sample evaluation and the agreed acceptance checks.
After customer approval, the accepted mold and specified documentation are prepared for shipment.
Suitability depends on part geometry, tooling investment, material requirements, initial demand and expected repeat orders.
Share your anticipated quantities so we can review the mold size, cavity arrangement, production requirements and applicable minimum order quantity.
Prototype or bridge tooling may be evaluated for eligible projects, but smaller production quantities are not automatically available.
The comparison depends on tooling investment, recurring part cost, material requirements and total production demand.
For suitable designs with repeat orders, the initial tooling cost can be distributed across more components, making injection molding more economical over time.
For prototypes or designs that are still changing, a manufacturing process without dedicated injection tooling may be more appropriate.
T1 generally refers to samples produced during an early formal mold trial.
These samples help evaluate mold performance, dimensional characteristics, appearance and assembly fit.
T1 samples are not automatically approved production parts. Tooling adjustments, additional trials or further inspection may be required before customer approval.
Yes. GPT Precision supports insert molding and overmolding projects.
Include the insert or substrate specifications, material requirements, critical interfaces and relevant functional requirements with your design.
These details guide the evaluation of tooling construction, positioning, retention and material compatibility.
Dimensional requirements are reviewed against the drawing, selected resin, part geometry and intended function.
Critical dimensions, datums, inspection methods and acceptance criteria should be established before tooling manufacture.
Where required, sample inspection records and production inspection requirements are agreed with the customer.
Share your design and production requirements to establish the appropriate tooling and manufacturing scope.
Whether you need a complete injection mold or finished plastic components, GPT Precision can review your design, material, expected demand and delivery requirements.
Quotation timing is determined by the drawings, material, quantity, tooling complexity and engineering review required. We will advise the expected quotation timeline after an initial project assessment.
