Melon Rubber Silicone specializes in delivering high-quality custom rubber and silicone molding services across various industries. With over 10 years of experience team of engineers, we ensure precision, efficiency, and durability in every rubber and silicone products we manufacture. Whether you need Liquid Silicone Rubber (LSR) injection molding, compression molding, overmolding, mold manufacturing, or custom rubber seals&gaskets, we offer cost-effective solutions from prototypes to production. With fast turnaround times and on-time delivery, you can trust us to meet your specific project needs. Contact us today for free quotation&DFM!.

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Our Key Services

Liquid silicone rubber (LSR )injection molding

LSR prototypes and production parts within days in a range of durometers and grades of LSR materials. Rapid Turnaround,Free (DFM) Design Support.

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Compression Molding(Press Molding)

Compresson Molding is cost-effective molding method with low tooling costs across various industries including o-ring, gaskets&seal, for low to medium volume production with various color/hardness.

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Overmolding (Insert molding)

Overmolding is multi-step injection molding process, to achieve additional layer resin to be added to an existing molded part,creating combination of characteristics seamless bond,saving assembly costs.

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Liquid Silicone Rubber (LSR) Molding Products

we produces custom prototypes and production of liquid silicone rubber (LSR) molding parts in 15 days or less in a range of durometers and grades of LSR materials.

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Molded Rubber Products

Custom manufacturer of molded rubber products certified to ISO 9001:2015 standards. Our products are made from a variety of high-quality materials including neoprene,NBR, HNBR, SBR, EPDM, FKM

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Mold Manufacturing (LSR Molds/Rubber Molds)

We offer mold manufacturing for LSR Injection molds,rubber Injection molds,and export LSR Injection mold benefit from our extensive internal experience in OEM rubber silicone products manufacturing.

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Compression Molding Process

Compression molding is that uncured rubber compounds is cured and transformed into the final molded products in rubber mold cavitity through the application of controlled heat and pressure of vulcanization machines.

1) Rubber Compounding Selection: Our engineers design the right rubber compound to meet custom specific requirements, considering factors like hardness, rubber type, color, and resistance to high temperatures, oils.

2) Custom Mold Design&Manufacturing: Mold engineer conduct mold design for manufacturability (DFM) analysis according to the product’s own structure, appearance requirements, demand quantity, dimensional tolerance requirements and etc.

3) Rubber Compounds Performing:to prepares uncured rubber compounds into individual blocks or strips, according to each product’s weight and structure, to shorten the compression molding cycle and reduce material waste.

4)Vulcanization Compression Molding:Uncured rubber compounds is cured and transformed into the final molded products in rubber mold cavitity through the application of controlled heat and pressure of vulcanization machines. The curing compression molding cycle time from 60 to 250 seconds is different depending on the product structure, vulcanizing machine tonnage, and specific rubber compounds used.

5) Quality Control: Stringent quality control measures, including engineer prototype testing, in-process sampling, and final inspections, ensure the precision, consistent quality, and production efficiency of compression molding

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Compression molding
compression molding process

Liquid Silicone Rubber Injection Molding

including Liquid Silicone Rubber Injection Mold Design & Manufacturing

LSR Material Connection with Liquid Silicone Feeder

Liquid Silicone Rubber (LSR) injection molding is a process where a two-component LSR material is injected into a mold under heat and pressure. The material cures in the mold to form durable, flexible, and heat-resistant lsr parts. This process is ideal for producing high-precision, detailed parts used in industries such as automotive, healthcare, and electronics.

At Melon Rubber Silicone, we have years of experience in LSR injection molding, offering rapid solutions for custom liquid silicone parts.

Liquid Silicone Rubber Molding Process:

1. Material Connection: LSR is connected to the liquid silicone feeder.
2. Mixing Compounds: Color masterbatch and silicone are mixed.
3. Mold Filling and Curing: The material is injected into the mold, and the part is cured.

Liquid Silicone Rubber Injection Mold Design & Manufacturing

Designing and manufacturing LSR injection molds involves careful planning. Critical factors include:

Cavity Quantity: Important for efficient production.
Part Weight: Ensuring the machine’s shot volume meets the part’s total weight.
Clamp Capacity: The mold must fit within the machine’s clamping unit.
Lsr Injection Machine Type: Vertical or horizontal machines affect mold design and de-molding.
Draft Angles: These ease part removal and reduce de-molding forces, minimizing part damage.
Parting Lines: Proper placement minimizes marks on finished products and ensures easy release.
Nozzles: Deciding between hot and cold nozzles depends on production volume and lsr part structure.
Gates, Runners, and Vents: These ensure even material flow, air expulsion, and defect prevention.
Machine Stability & Operator Skill: Both significantly impact the final product’s quality.

Wide Surface Finish Options: We offer various surface finishes,

include:Matte: Smooth and non-reflective.
Glossy: Polished for a reflective, aesthetic look.
Textured: Custom textures following VDI3400 standards.

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What Advantages Do Liquid Silicone Rubber (LSR) Injection Products

Material Properties

  • Extreme Temperature Resistance: LSR parts can withstand temperatures from -70°C to +300°C, making liquid silicone injection molding ideal for applications in automotive, aerospace,consumer.
    Wide Hardness&Superior Durability: Avaliable from10 to 80shore A, and LSR is highly resistant to weathering, UV radiation and ozone, compared to solid silicone, rubber, or soft plastics, which can degrade faster under harsh conditions.
    Biocompatibility: LSR is FDA-approved and biocompatible, suitable for medical and food-grade applications, whereas many solid silicone or rubber materials require additional certification processes.
    Chemical Resistance: LSR offers excellent resistance to acids, bases, and solvents, while soft plastics and some rubber materials are more vulnerable to chemical attack.

Precision & Less Material Waste:

  • Low Flash: Less Material Waste: LSR injection molding produces little to no material waste (no runner, no flash), making it a more cost-effective choice for larger production runs compared to compression molding.
  • Higher Precision: LSR injection molding supports tighter tolerances and more complex part geometries, particularly with intricate designs. This is made possible by precision-engineered molds and advanced injection processing techniques.
  • Clean Processing:The entire process of LSR molding is enclosed, from material feeding to final curing. This ensures higher purity and performance for food-grade and medical-grade products, as there is no manual interference during production.
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Why Choose Us

Quickly Repsond and Design Support

Quickly Repsond and Design Support,10Years of Experience

Quotes within 24hours, custom rubber silicone parts within 5-7days,DFM analysis provided free. With over 10 years of experience team of engineers, we ensure precision, efficiency, and durability in every rubber and silicone products in any size, color, hardness, or shape, tailored to your specific need.

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Custom Mold Design & Manufacturing

Custom Mold Design & Manufacturing

At Melon Rubber Silicone, we specialize in designing and manufacturing high-precision custom molds for both rubber and silicone products. Our experienced engineering team uses advanced CAD software and tooling processing technology to create molds that meet the exact specifications of your project, ensuring superior quality and performance.

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Stringent Quality Control

Quality is our top priority. We have implemented strict quality control measures throughout the production process. From incoming material inspections to in-process quality checks and final inspections, we ensure that each product meets the industry standards.
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Cost-effective,Flexible Production Capacity(prototypes to production)

Cost-effective,Flexible Production Capacity(prototypes to production)

Melon Rubber Silicone specializes in delivering high-quality custom custom molded rubber and silicone products across various industries.Whether you need Liquid Silicone Rubber (LSR) injection molding, compression molding, overmolding, mold manufacturing, or custom rubber seals&gaskets, we offer cost-effective solutions from prototypes to production. With fast turnaround times and on-time delivery.

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Post Curing of molded silicone rubber products

Value-added Services

We offer value-added services such as post curing, assembly, packaging, labeling,oil spray, UV coating and reverse engineering.These services provide a comprehensive solution for your product needs.

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Fast and Efficient Delivery (Free Shipping)

Our fast response system guarantees the completion of the customer’s order requirements. Once the products are finished and confirmed, our relevant staff will arrange a free shipment. The delivery of general orders will be 15-30 days.
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After-Sales Support

1. Technical Assistance

Our dedicated team of experts provides technical support to any inquiries or concerns you may have regarding our custom molded rubber and silicone products. We are committed to ensuring your complete satisfaction and assisting you in achieving optimal product performance

2.Continuous Support and Improvement

Our commitment to after-sales support extends beyond the initial purchase. We value long-term partnerships with our customers and strive to continuously improve our products and services. We actively seek feedback and suggestions to enhance our offerings, address emerging needs, and provide tailored Rubber injection molding solutions that meet evolving requirements..

3.Technical Expertise:

Our highly skilled technical team is well-versed in the intricacies of custom molded rubber silicone injection molding products. They possess deep knowledge and expertise to provide accurate and reliable technical support. Whether you need assistance with product installation, troubleshooting, or maintenance, our experts are here to help.

4.Warranty Coverage

We stand behind the quality and performance of our custom molded rubber silicone injection molding products. As a testament to our confidence, we offer warranty coverage to protect our customers’ investment. Our warranty ensures that any manufacturing defects or non-compliance with specifications will be promptly addressed and resolved.

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Rubber Silicone Molding Service FAQs

We utilize high-quality materials such as silicone, rubber, and other elastomers in our custom molded products. These materials are selected for their durability, flexibility, and resistance to various environmental factors.

Our custom molded rubber silicone injection molding products are manufactured using a variety of high-quality materials, each offering unique advantages and characteristics. Here is an overview of some commonly used materials:

NBR (Nitrile Butadiene Rubber): NBR is highly resistant to oils, fuels, and chemicals, making it an ideal choice for automotive applications. For instance, we manufacture NBR O-rings and gaskets that are used in engine components, fuel systems, and transmission systems of vehicles. These NBR seals provide reliable sealing and prevent leakage in demanding automotive environments.

CR (Chloroprene Rubber): CR exhibits excellent weathering resistance, ozone resistance, and flame retardancy. In the marine industry, we produce CR seals and gaskets that are commonly used in boat engines, watercraft hulls, and offshore equipment. These CR components effectively withstand exposure to saltwater, UV radiation, and harsh marine conditions.

EPDM (Ethylene Propylene Diene Monomer): EPDM is renowned for its outstanding weather resistance and durability. We manufacture EPDM seals and gaskets that find applications in the construction industry, specifically in windows, doors, and architectural elements. These EPDM components provide excellent sealing, thermal insulation, and resistance to weathering and UV exposure.

FKM (Fluoroelastomer): FKM exhibits exceptional chemical resistance, high-temperature stability, and excellent mechanical properties. In the chemical processing industry, we produce FKM seals, O-rings, and gaskets that are utilized in pumps, valves, and pipelines. These FKM components effectively withstand aggressive chemicals, extreme temperatures, and challenging operating conditions.

Silicone: Silicone materials offer excellent flexibility, high-temperature resistance, and biocompatibility. In the healthcare industry, we manufacture medical-grade silicone components such as seals, gaskets, and diaphragms used in medical devices and implants. These silicone products comply with FDA regulations, ensuring safety and biocompatibility for patient care.

LSR (Liquid Silicone Rubber): LSR is known for its clarity, heat resistance, and biocompatibility, making it suitable for various industries. In the automotive sector, we produce LSR gaskets and seals used in engine components, where heat resistance and durability are crucial. In the electronics industry, LSR is employed in keypads, connectors, and electrical insulation components due to its excellent electrical properties and resistance to environmental factors. Additionally, in the infant care industry, we offer FDA-approved LSR materials for manufacturing baby feeding accessories like pacifiers and bottle nipples, ensuring safety and compliance with regulatory standards.

For different industry sectors, we tailor the material formulations to meet specific requirements. In industries such as automotive and aerospace, where heat and chemical resistance are crucial, we utilize high-grade silicone materials that comply with industry standards and regulations. These materials ensure optimal performance and safety in demanding environments.

In the healthcare and medical sectors, we use medical-grade silicone materials that meet strict regulatory requirements, including FDA compliance and biocompatibility. These materials are hypoallergenic, non-toxic, and suitable for applications requiring prolonged contact with the human body.

For applications in the electronics and electrical equipment industry, we offer silicone materials with excellent electrical insulation properties, thermal stability, and flame resistance. These materials provide reliable protection and insulation for sensitive electronic components.

Furthermore, we have the capability to develop custom material formulations to address specific industry needs. For instance, in the infant care industry, we can provide liquid silicone materials that are FDA-approved and suitable for baby feeding accessories. These materials ensure safety and compliance with regulatory standards.

At our custom molded rubber silicone products facility, we approach mold design with a meticulous and systematic process to ensure optimal results. Our experienced team of engineers combines expertise with advanced CAD/CAM software to create molds that precisely meet the specific requirements of each product.

We begin by conducting a comprehensive Design for Manufacturability (DFM) analysis, considering various factors such as part geometry, material characteristics, and production volume. This analysis helps us optimize the mold design for efficient manufacturing processes and high-quality end products.

To further enhance the mold design, we utilize advanced mold flow analysis software. This enables us to simulate the flow of molten rubber silicone material within the mold cavity, allowing us to optimize factors like gate location, cooling channels, and venting. By minimizing defects such as air traps, voids, or flash, we ensure consistent part quality and dimensional accuracy.

In parallel, we carefully analyze the material properties required for the specific application. Through comprehensive material analysis, including hardness, tensile strength, elongation, and chemical resistance evaluations, we select the most suitable rubber silicone material that guarantees excellent performance and durability.

Additionally, our engineers conduct a detailed analysis of the product’s structure and mechanism. This involves evaluating factors such as wall thickness, rib design, draft angles, undercuts, and functional requirements. By considering these aspects, we create mold designs that accommodate the product’s intended functionality, aesthetics, and ergonomic considerations.

Overall, our approach to mold design for custom molded rubber silicone products combines technical expertise, advanced software tools, and a commitment to delivering molds that enable efficient production and consistent product quality. With our meticulous attention to detail, we ensure that each mold design meets the unique requirements of our clients and results in superior custom molded rubber silicone products.”

By incorporating more details and emphasizing the technical expertise and commitment to quality, the revised response provides a more comprehensive and persuasive explanation of the mold design process for custom molded rubber silicone products.

We employ a range of molding processes to meet the diverse needs of our customers for custom rubber silicone injection molding.

One of our primary processes is liquid silicone injection molding (LSR), which involves injecting liquid silicone material into a precise mold cavity under high pressure. LSR molding offers several advantages, including excellent dimensional accuracy, tight tolerances, and the ability to produce intricate and complex designs. This process is ideal for applications that require high-quality and high-performance rubber silicone products, such as medical devices, automotive components, and consumer electronics.

Another molding process we utilize is compression molding. This method involves placing pre-formed rubber silicone material into a mold cavity and applying heat and pressure to shape it into the desired form. Compression molding is suitable for low to medium volume production and allows for cost-effective manufacturing of various rubber silicone products, such as O-rings, gaskets, and seals.

Additionally, we employ transfer molding for certain applications. Transfer molding involves heating the rubber silicone material and forcing it into a mold cavity through a runner system. This process allows for precise control over material flow and is commonly used for manufacturing products with intricate designs, over-molding applications, and parts that require insert molding.

By leveraging these molding processes, we can cater to a wide range of product requirements, volumes, and complexity levels. Our experienced team of engineers carefully assesses the project specifications and selects the most suitable molding process to ensure the production of high-quality custom rubber silicone injection molded products.

Tolerance control is a crucial aspect of our manufacturing process. We employ advanced machining techniques, precise tooling, and rigorous quality inspections to ensure tight tolerances are achieved and maintained throughout production. Our goal is to deliver products that meet the specified dimensional requirements

Yes, we offer prototyping services to validate designs and provide samples for customer evaluation. Our rapid prototyping capabilities allow us to efficiently create prototypes that closely resemble the final product, enabling our customers to make informed decisions before proceeding with full-scale production..

At our company, we have a dedicated quality assurance team that meticulously oversees every stage of the manufacturing process to ensure the highest level of quality for our custom molded rubber silicone injection molding products. Our commitment to quality is unwavering, and we strive to deliver products that meet the most stringent standards.

To guarantee the dimensional accuracy, performance, and durability of our products, we employ advanced testing equipment and methodologies. This includes conducting a range of tests to validate the functionality and reliability of our custom molded rubber silicone products.

During the prototyping phase, we utilize cutting-edge techniques such as 3D printing and CNC machining to rapidly produce prototypes that closely resemble the final product. These prototypes undergo rigorous testing and quality checks to assess their performance and suitability. For instance, in the case of O-ring seals, we conduct specialized tests such as leakage testing, compression set testing, and hardness testing to ensure proper sealing and performance under different conditions.

In addition to prototyping, we implement robust quality control procedures for larger production runs. This involves the implementation of sampling plans and statistical process control (SPC) techniques to monitor and maintain consistent product quality. Our quality control team conducts regular inspections, measurements, and tests throughout the production process to verify that the products meet the required specifications.

Furthermore, we prioritize material testing to ensure the quality and reliability of our products. We subject the raw materials used in the production process to rigorous testing, assessing their physical properties such as tensile strength, elongation, and hardness. By conducting comprehensive material testing, we ensure that our custom molded rubber silicone products are made from high-quality materials that meet the necessary standards and specifications.

By employing these meticulous quality assurance measures and conducting thorough product testing, we aim to deliver custom molded rubber silicone injection molding products that exceed customer expectations in terms of performance, durability, and reliability.

Additional Information About Rubber Silicone Injection Molding

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