What kind of products does Carosung's factory mainly produce?

Custom mold development typically involves design review, engineering assessment, mold manufacturing, trial production, sample evaluation, and final approval.

Step 1: Design Review and DFM Assessment

Customers can provide sketches, reference images, technical drawings, or 3D CAD files.

Our engineering team reviews the design for manufacturability, including wall thickness, draft angles, corner radii, structural strength, assembly requirements, and material flow where relevant. Recommended modifications can be discussed before tooling begins.

Step 2: Mold Design and Manufacturing

After the design is confirmed, the mold is designed and manufactured using suitable machining processes. Depending on the geometry, these may include CNC machining and electrical discharge machining (EDM).

The tooling structure and manufacturing method depend on the selected material and production process. Zinc alloy die-casting molds, for example, are designed differently from tooling used for stamping or other metalworking processes.

Step 3: Trial Production and Sample Evaluation

Initial trial parts are produced and checked for dimensions, structural features, surface quality, and assembly requirements.

Where adjustments are necessary, the mold or product design can be revised before final sample approval.

Step 4: Surface Finishing and Approval

Trial parts can be polished and finished in the proposed color for customer evaluation. Physical samples allow customers to review the appearance, dimensions, fit, and function before authorizing mass production.

The best surface finish depends on the base material, desired color, product structure, expected wear, corrosion requirements, applicable regulations, order quantity, and budget. PVD coating and traditional electroplating each have suitable applications.

PVD Coating

Physical Vapor Deposition (PVD) is a vacuum-based coating process used to create functional and decorative surface layers.

Depending on the coating system and application, PVD can offer good surface hardness and wear resistance. It may be suitable for selected hardware components that experience frequent contact or friction.

Available colors may include gold, rose gold, gunmetal, matte black, and metallic silver, depending on the substrate and coating process.

Actual performance depends on the base material, surface preparation, coating system, and processing conditions. Testing should be specified where particular performance requirements apply.

Traditional Electroplating

Electroplating is widely used to achieve metallic colors and decorative finishes. It can provide bright, reflective surfaces and a broad range of color options when the substrate and finishing process are suitable.

Possible finishes include gold, silver, bright nickel, chrome, and other agreed colors. The exact appearance and performance depend on the plating system, underlayers, surface preparation, and any protective topcoat.

Electroplating can be appropriate for decorative hardware as well as selected functional components. Its suitability should be assessed according to the intended use rather than assuming it is only for low-wear applications.

Vintage and Textured Finishes

For brands seeking a heritage or understated appearance, options may include antique gold, antique bronze, antique copper, antique silver, satin, brushed, and sandblasted finishes.

Two-tone effects and protective topcoats may also be considered where technically feasible.

How to Make the Right Choice

We recommend evaluating appearance, wear requirements, corrosion resistance, material compatibility, regulatory requirements, production volume, and budget together. Where necessary, samples and agreed testing criteria can be used to evaluate the selected finish before mass production.

The right material depends on the intended use, required strength, weight, corrosion resistance, appearance, manufacturing method, and budget. Different materials offer different advantages.

Stainless Steel

Stainless steel grades such as 304 and 316 are commonly considered for hardware requiring good corrosion resistance and durability.

Grade 316 generally offers better resistance to chloride-related corrosion than grade 304, although actual performance depends on the environment, surface condition, and material grade.

Stainless steel is often suitable for functional hardware, rings, hooks, buckles, and components that require a solid metallic feel. Its weight, machining requirements, and finishing options should also be considered.

Brass

Brass is valued for its substantial feel, machinability, and distinctive appearance. It can be suitable for premium decorative hardware and selected functional components.

Depending on its composition and environment, brass may tarnish, oxidize, or develop a patina over time. Appropriate finishing can help achieve the desired appearance and performance.

Zinc Alloy

Zinc alloy is widely used for decorative and functional hardware with complex shapes, detailed logos, and three-dimensional designs. Die-casting can be an efficient manufacturing method for suitable geometries and production volumes.

It is often considered for bag locks, logo plates, buckle heads, and decorative fittings. The suitability of zinc alloy for load-bearing applications depends on the component design, alloy, manufacturing quality, and required mechanical performance.

Aluminum

Aluminum is valued for its relatively low density and can be useful when reducing product weight is important. Its strength, surface hardness, and corrosion performance depend on the alloy, component design, and surface treatment.

How to Choose

For a practical material recommendation, share the product drawing or reference image, intended application, approximate dimensions, required finish, target quantity, and budget. Our team can then assess suitable material options for the project.

Carosung offers customization options to help brands develop hardware that matches their product design, functional requirements, and brand identity.

Dimensions and Structure

Depending on the product, customization may include:

• Overall dimensions, ring diameters, thickness, and weight.
• Strap slot width and component fit.
• Internal structures, springs, and locking mechanisms.
• Assembly methods and functional details.
• Product-specific tolerances and connection points.

Our engineering team can review drawings or reference samples and assess whether the proposed design is suitable for manufacturing.

Materials and Surface Finishes

Available material options may include zinc alloy, stainless steel, brass, and aluminum, depending on the product's structural and functional requirements.

Surface finishing options can include:

• Bright polished and mirror finishes.
• Satin and brushed finishes.
• Matte and sandblasted textures.
• Gold, silver, rose gold, gunmetal, and black finishes.
• Vintage and antique effects.
• Two-tone finishes using suitable finishing processes.
• PVD coating and traditional electroplating.

The final finish depends on the base material, product geometry, surface preparation, and required appearance.

Logo Customization

Brand logos can be incorporated through suitable methods such as laser engraving, mechanical engraving, screen printing, or raised and recessed features designed into the mold.

The best method depends on logo complexity, material, production quantity, and the desired visual effect.

Decorative Details and Packaging

Where technically feasible, hardware can incorporate decorative elements such as crystal accents or leather inserts.

We can also discuss customized packaging, including protective bags, printed packaging, and retail gift boxes. Packaging specifications are confirmed according to the product and order requirements.

ISO 9001 Quality Management Certification

Yes. Carosung's factory has obtained ISO 9001 certification. Our quality management approach covers key manufacturing activities, from incoming material inspection and production monitoring to final inspection and packaging.

Standard operating procedures help maintain consistency across production stages, while inspection records and corrective actions support ongoing quality improvement.

Product Testing and Regulatory Requirements

For customers selling into markets with specific chemical and product safety requirements, we can discuss suitable materials, surface-finishing options, and testing arrangements according to the product specifications and applicable regulations.

Relevant requirements may include:

REACH: European Union requirements concerning chemicals, including applicable restrictions and Substances of Very High Concern (SVHC).

RoHS: Restrictions on certain hazardous substances in products within the directive's scope.

California Proposition 65: Requirements relating to exposures to listed chemicals, where applicable.

Carosung has previously arranged testing for other customers against relevant requirements and obtained passing reports for those projects. These reports apply to the products and test conditions covered by the respective reports; they should not be interpreted as blanket certification of every Carosung product.

Testing can be arranged for a specific product or project when required. The applicable test scope and documentation should be confirmed according to the material, finish, destination market, and customer's compliance requirements.

Material Documentation

Material certificates and supporting documentation may be available depending on the material supplier, grade, and purchase requirements. Specific documentation should be confirmed before order placement.

Flexible Customization and Manufacturing Support

Carosung supports brands at different stages of product development, from selecting existing hardware to developing fully customized components. Our services can include design evaluation, mold development, material selection, surface finishing, logo application, quality inspection, and packaging.

For selected stock products, customization may involve surface finishing and laser-engraved logos, offering a practical option for customers who need shorter lead times. Fully customized projects receive a more comprehensive development process based on their structural complexity and production requirements.

Surface Finishing Options

We offer PVD coating and traditional electroplating options, together with other finishes where applicable. The appropriate process depends on the base material, product structure, desired appearance, wear requirements, corrosion resistance, production quantity, and budget.

PVD coating can be suitable for applications requiring a durable decorative surface, while traditional electroplating offers a broad range of metallic colors and finishes. Both processes require appropriate surface preparation and process control.

Precision and Quality Control

Our manufacturing capabilities include CNC machining, metal stamping, die-casting, and manual or automated polishing. Dimensional tolerances are determined according to the product design, manufacturing process, and functional requirements.

We also evaluate surface quality before finishing to identify visible defects that may affect the final appearance.

Brand Protection and Packaging

We can support confidential product development, customized logo application, and private-label packaging. Where required, confidentiality agreements can be arranged to help protect customer designs and project information.

Our goal is to provide coordinated manufacturing support, practical technical advice, and consistent quality management throughout the product development process.