Overmolding is another subset of injection molding. It is the process of molding different materials or different colors of the same material in the same mold to create complex multi-material or multi-color parts. As with typical injection molding, the overmolding process begins with the injection of a substrate material into a mold. Then, a second injection is made using a different material or the same material with a different color into the same mold. The material from the second injection is layered directly on top of the first layer. This results in a single solid piece composed of different materials or colors. The process is great for enhancing grip characteristics for consumer products and attractive, multi-color products. Micro overmolding is often used to create small parts like: multi-color buttons or housings for electronics and seals and gaskets in automotive.

Bucket mold is one of our most important plastic injection mold, our bucket mold includes thin wall bucket mold, food bucket mold, pail mold, cylinder bucket mold, square shape bucket mold,cuboid bucket mold, industrial use bucket and pail mold, water bucket mold, industrial paint bucket mold, fishing bucket mold, packing bucket mold, dustbin bucket mold,cement pail mold, plastic barrel mold and other bucket molds.

LCPs are advanced polymer materials that maintain an ordered microstructure in both liquid and solid phases. The ordered microstructure results in exceptional mechanical strength and great temperature and flame resistance. Uses of LCP include: electrical connectors, catheters, surgical and dental instruments, and coatings on cookware.

Micro molding offers significant cost savings compared to conventional injection molding. The cost savings are a result of the smaller tools and machinery needed to complete the micro molding process. Tools and molds are often smaller in size and thus cheaper to manufacture. Additionally, because parts are smaller, clamping forces are smaller, and consequently, power requirements are smaller. Finally, since parts are smaller, cycle times are often shorter since parts do not require as long a time to cool compared to parts made from conventional injection molding. All these traits of micro molding enable significant cost savings.

Polyethylene is one of the most commonly used thermoplastics in the world. Polyethylene is an FDA-compliant material, which makes it suitable for food and beverage applications. Additionally, it has great chemical and thermal resistance, as well as high tensile strength. Common applications of PE include: packaging, consumer goods, and textiles.

PBT is a thermoplastic that has great dimensional stability, high strength, good chemical, UV, and thermal resistance, and low moisture absorption characteristics. PBT is often used in the automotive and electronics industries for automotive fenders, electrical enclosures, and power-tool housings.

Cooling system design is a relatively cumbersome work, namely to consider the uniformity of the cooling and the cooling effect, also the impact brings to the overall mold structure, determining the exact location and size of the cooling system; and cooling for key positions such as moving plate or the inserts, side sliders as well as side cores;standard cooling element design and the selection of the cooling standard components. Heya plastic mould analyzes all series of factors when begin to start the mold design. The mold has recycled water to flow in every part of it which reduces the cooling time, improves the production efficiency and greatly reduces products costs.

Polycarbonate is a thermoplastic known for its transparency, optical clarity, tensile and impact strength, recyclability, and chemical and fire resistance. These properties make polycarbonate great for electrical housings, switches, machine guards, and more.

Delrin® is DuPont’s trademarked polyoxymethylene (POM or acetal) resin. Delrin® is known for its strength, toughness, elasticity, rigidity, chemical and flame resistance, machinability, dimensional stability, and low friction coefficient. POM is used for mechanical components such as: gears, pulleys, and rollers.

PEEK is a special thermoplastic that is known for its wide operating temperature range up to 489 °F or 250 °C. Not only that, but it also has high strength, great chemical resistance, and high stiffness. PEEK is used in a variety of applications, from mechanical components like: bushings, bearings, and seals to fluidic components like valves and fittings, electrical housings, and connectors.

Drug delivery devices are medical devices that deliver and/or control the release of a medicine or therapeutic agent to specific sites in the human body. Typical drug delivery can be accomplished by digestion, inhalation, injection, or topical techniques. However, advancements in medicine have led to the use of micro molding to create drug-delivery devices with new methods for administering medicines. Microneedle patches that have an array of tiny needles thinner than a strand of hair and small robotic pills that help treat various digestive disorders are examples of drug delivery devices that utilize micro molding. Xometry’s micro molding capability enables the fabrication of such devices.

Surface finish is a significant factor for micro molded parts, not only when it comes to aesthetic appeal, but also the functionality of a micro molded product. Advanced manufacturing methods like micro-machining and EDM are used to attain precise dimensions in the cavities of small micro molds. While EDM can be used to achieve precise dimensions, it also has the ability to create desirable mold textures in cavities that lead to smooth, finished parts.

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Choose from millions of possible combinations of materials, finishes, tolerances, markings, and certifications for your order.

It is important to keep maintenance for the moulds. We should check and make sure the the water channels and air circuit unlocked. Add lubricant oil for the siliders, regularly clean the stripper plate and centre ejector.

As with surveillance equipment and fitness trackers, the electronics used in robotics are small and must satisfy small dimensional tolerances. Micro molded parts help reduce the weight of robotics while also helping them improve performance and function. Different applications of micro molded products in robotics include:

Surveillance equipment that utilizes optical devices such as CCTV cameras and body cameras is another application of micro molded components. As electronics become smaller, the components in electronics must satisfy tighter tolerances and more stringent precision requirements. Below are some examples of micro molded components for surveillance equipment.

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Nylon is a popular thermoplastic lauded for its chemical resistance, strength, and dimensional stability across a wide temperature range. Nylon has many uses including: textiles, electrical housings, and mechanical components like bearings, bushings, and sprockets.

ULTEM® is a popular brand name for the thermoplastic PEI. PEI is known for its rigidity, high mechanical strength, and creep resistance over a broad range of temperatures. Additionally, PEI is a great electrical insulator, which makes it commonly used for applications like coils and fuses in electronics and interior trim pieces in aircraft.

Insert molding is a type of injection molding in which a metal component is placed into a mold cavity before molten plastic fills the mold. Insert molding is also possible with micro molding. In the insert micro molding process, a metal insert is positioned either manually or automatically by a robotic arm in the mold. Then, the mold closes, the plastic resin is injected in a single shot, and the molten plastic forms around the insert to create a single part. Finally, the part is ejected, the metal insert is removed, and the process repeats. Insert micro molding is a great way to enhance product durability and functionality. It is commonly used in the medical manufacturing industry to make components like catheters or in the electronics industry for micro-optic and integrated circuit components.Â

Medical devices require parts to be made to stringent dimensional standards to ensure healthy patient outcomes and safety. Medical devices are one of the biggest applications of micro molded parts. The different applications in which micro molding is used in medical devices are listed below:

There are various types of micro molding, each with its own sets of advantages and disadvantages and special use cases. The different types of micro molding processes are listed and described below:

The micro molding process is nearly identical to the standard plastic injection molding process but requires more careful control to ensure high-quality parts. Before micro injection molding can actually begin, molds and die sets must be fabricated. Precise and advanced manufacturing methods such as electric discharge machining (EDM), micro EDM, and micro-machining are used to create extremely precise molds with tolerances as small as a few micrometers. Once fabricated, molds can be mounted in a micro injection machine. Then, a thermoplastic or liquid silicone rubber is melted and maintained at a consistent temperature. The molten material is forced into the micro mold with a controlled flow rate and held at a particular pressure while it cools. Advanced programming and controls within micro injection molding machines ensure molding parameters are stable and consistent. Once sufficiently cooled, the micro injection molded parts are ejected from the mold and inspected to ensure dimensional tolerances are met.

Xometry offers high-quality micro molding services for a variety of industries and applications. Common applications for micro injection molding include integrated circuit components and automotive door-locking mechanisms. Our vast manufacturing network coupled with our extensive manufacturing experience ensures your parts will be made to the highest standards of quality with short lead times.

Micro molding is a highly advanced and specialized manufacturing process that enables the fabrication of complex, miniature parts with incredible precision. Considered a subset of plastic injection molding, micro molding is tailored for producing parts with features typically less than one millimeter. It has gained prominence in industries like: medical device manufacturing, electronics, automotive, and aerospace. The ability to efficiently create precise parts with minute features in large volumes and in a wide range of compatible materials are some of the biggest advantages of custom plastic injection micro molding.

Polypropylene is another popular plastic used for components in a variety of industries and applications. Desirable properties of PP include: rigidity, wide operating temperature range, and chemical, corrosion, and fatigue resistance. Common applications of PP include: packaging, machinery components, textiles, and consumer goods.

Xometry offers the highest quality micro molding services and can assist in the production of parts with intricate and complex geometries and excellent surface finishes. Subject to availability. Xometry doesn't guarantee that we can provide this service at any given time.

Fitness trackers are popular medical and consumer electronic devices that track important health information such as: heart rate, breathing rate, distance traveled, and time asleep. These devices must be small and minimally invasive to optimize user comfort while maintaining functionality. Micro molded parts for fitness trackers include:

Acrylic is a widely used thermoplastic due to its optical clarity and transparency, high tensile and impact strength, light weight, and durability. PMMA is often used as a substitute for glass and is commonly used in applications like: signage, windows, machine guards, and more.

Material selection is highly important in micro molding projects as thermoplastic polymers and other specialized resins must be carefully vetted for suitability for particular applications, particularly in medical applications. The different materials used in micro molding are listed and described below:

Not only are the parts made by micro molding lightweight, but they are also exceptionally small in size. Advanced machining processes like micro-machining and EDM are used to create small, precise mold cavities and cores. As a result, micro-molded parts can easily fit into small and confined spaces. Micro molding has become a popular process for creating small parts in electronics, medical implants for orthopedics, pacemakers, and micro-optics.

Drones are uncrewed, remotely controlled, or programmed aircraft that are used for many applications—from surveillance to hobbyist uses. Lightweight micro molded components are important for the function and performance of drones. Micro molded components in drones include:

Creating parts that satisfy tight tolerances is something the micro molding injection molding technique excels at. Micro molding enables the production of exceptionally small, detailed, and complex components with tolerances as small as 0.005” to 0.015”. Advanced manufacturing methods like micro-machining and EDM allow micro-sized cavities, cores, and other features to be made with great accuracy. The process is often used in the fabrication of electronics, medical devices, and micro-optics because of its ability to produce parts that satisfy tight tolerances.

A high-quality mold structure is a premise for a qualified mold before manufacturing.We attach great importance to analyze mold structure, including demolding draft angle, the epitome of product surface, gating system design, exhaust design, cooling system design etc.The main problems that may easily occur will through trial and error during the mold structure design.

Micro molding enables automotive parts to be smaller. This results in lighter, more fuel-efficient, and better-performing vehicles. Applications of micro molding in the automotive industry include:

Micro molding creates parts that are lightweight and small. This is particularly useful for creating small and comfortable medical implants. Additionally, lightweight micro molded parts are also important in the creation of small, lightweight electronics or microfluidic components like small valves and fittings.

High volumes of precise parts can be made with micro molding just like with standard injection molding. Molds used in micro injection molding can have multiple cavities which enable the production of several parts in a typical 30 to 60 second cycle time. Manufacturers can easily produce hundreds to thousands of parts a day with micro molding.

Thermoplastics used in the micro molding process often exhibit great chemical resistance. Therefore, the miniature parts created by the process can be used in applications with high exposure to various chemicals or in corrosive environments. This is particularly useful in the medical industry for implants, instruments, and diagnostic equipment, as well as in fluidic control components like valves and fittings. Additionally, various consumer goods and electronics may benefit from the chemical resistance offered by micro molded parts.

In order to improve the mold life and product quality, we increase the mold steel hardness through heat treatment. The steels we commonly use are H13(48-52HRC), 2316(45-50HRC) etc.to prevent mold eccentric, we use whole piece of steel to make the bucket. The cooling system is very important. We adopt single loop cooling way and setup even distribution water channels as much as possible. To enhance the cooling effect, BeCu can be inserted on the core and cavity, see pictures as below:

Our bucket molds use air assistance,stripper plate and centre ejector for demolding (release in two steps).In order to increase cooling performance, there also have water channels in the centre.

FDA standards regulate devices and components that can be used in the medical industry. Xometry is ISO 14385 certified and has extensive manufacturing and industry experience. This means your micro molded parts are fabricated to the highest standards of quality and to comply with regulatory standards.Â

PSU is a translucent thermoplastic known for its biocompatibility, food compatibility, good mechanical properties, and wide operating temperature range. PSU is commonly used in food preparation and medical industries due to its bio-friendliness.Â