ZHONGDECustomizing | Manufacturing
Zhongde can provide over-molding and insert molding to produce unique multi-material parts. Our production materials range from thermoplastic to elastomer-rubber, as well as metal. We've broken down the differences and similarities between the two processes. Let us help you decide which process is right for your project.
Both over-molding and insert molding processes involve putting two types of materials together to make one part. Overmolding is a two steps process that one to create the substrate and one for the oversold that goes on top of it. Insert molding is a slightly faster process as it takes only one step that the two materials are molded at the same time.
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Overmolding is a process where a single part is created using two or more different materials in combination. Traditonally, overmolding starts with injection molding a hard plastic resin that has a higher melting point. Once that part is cooled, another material is injection molded over the first part, resulting in a single, finished product.
Insert molding combines metal and plastics into one single part. It allows plastic to bond to insert pieces, mostly brass or stainless steel metal component, which go inside a mold cavity. There are many options for insert that can be placed into the mold. A few of examples are warming labels, threaded bushings, wires, batteries, etc.
Below table shows the size of Overmolding & Insert Molding parts we usually make. If you need a larger size, we can also help you achieve it.
In addition to the general materials listed below, Zhongde can also modify the materials according to the special needs of customers. Our professional engineers will adjust the raw material formula to meet the unique conditions of use.
ABS | Acrylonitrile Butadiene Styrene
PA 6 | Polyamide 6, Nylon 6
PA 6/6 | Polyamide 6/6, Nylon 6/6
POM | Acetal Polyoxymethylene, Delrin
PP | Polypropylene
PE | Polyethylene
LDPE | Low-Density Polyethylene
HDPE | High-Density Polyethylene
UHMWPE |Ultrahigh Molecular Weight Polyethylene
PTFE | Polytetrafluoroethylene
PEEK | Polyether Ether Ketone
PC | Polycarbonate
PMMA | Polymethyl Methacrylate, Acrylic
PS | Polystyrene
PVC | Polyvinyl Chloride (Shore D)
PU | Polyurethane
NR | Natural Rubber
NBR | Nitrile Rubber
SBR | Styrene-butadiene Rubber
HNBR | Hydrogenated Nitrile
CR | Neoprene Rubber
VMQ | Silicone
LSR | Liquid Silicone Rubber
FVMQ | Fluorosilicone
FKM | Fluorocarbon
FFKM | Perfluorocarbon Rubber
EPDM | Ethylene-Propylene Diene Monomer Rubber
IR | Polyisoprene Rubber
IIR | Butyl Rubber
Absorb UV radiation, slowing down the degradation of the material when used outdoors.
Prevent ignition and inhibits spread of fire.
Increase flexibility and promotes plasticity, reducing brittleness of the material.
Used to color plastics.
Increase strength, toughness, and rigidity of the material at the expense of making the material more brittle.
Increase strength, toughness, and rigidity of the material at the expense of making the material more brittle. It is more flexible than carbon fibers.
The mold is smoothed and then polished with a diamond buff, resulting in parts with a mirror-like finish.
The mold is smoothed with fine grit sandpaper, resulting in parts with a fine surface finish.
The mold is smoothed using fine stone powder, removing all machining marks.
The mold is first smoothed with fine stone powder and then sandblasted, resulting in a textured surface.
The mold is finished to the machinist's discretion. Tool marks may be visible.
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