Medical Automotive DME ABS PC Overmold Injection Mold

Medical Automotive DME ABS PC Overmold Injection Mold

Mold details description

Overmolding Design Material Selection

Different types of materials that are used during the plastic overmolding process will either be harder, softer or a combination of both. Certain product overmolding designs will require a “grippy” or “squishy” quality regarding the handle. What then is the process that determines the materials that are required to achieve those qualities? The processes stated below are often used to determine what types of materials are required for a given effect.

Thickness Effects

When choosing a soft touch TPE, designers usually ask for the softest material available. What they do not know is that the soft durometer of a TPE adds little value to the concept of "cushion" when thickness of the TPE is below a certain point (typically > 0.040"). This means that the thinner the TPE over-mold, the harder it will feel. One way of getting around this issue is to incorporate multiple ribs that are placed closely together to create the perception of thickness without using a large amount of material.

Hardness vs. Modulus

One common myth in the TPE industry is that the durometer (or hardness) of a material is directly related to its flexibility. This is not always true; for example, a 65 Shore A SEBS material is much more flexible than a 65 Shore A TPU. Instead of using Shore Hardness, a more suitable measure of flexibility is the flexural modulus, which measures a material's resistance to bending. A higher flexural modulus typically means that a material will feel more stiff and unyielding.

Coefficient of Friction

When two surfaces are dragged flat against each other, the resulting resistance is characterized as friction. The coefficient of friction (COF) characterizes the degree of force required to move one surface across another - either from a complete stop (static friction) or when the surface is already moving (kinetic friction). Typically, TPE's are described as rubbery or "grippy". One area that product designers often misunderstand is the relationship between durometer and COF. Most believe that the softer the TPE, the greater the COF - this is a very general statement and is not true in all cases.

Our Advantage

1. Factory direct price

2. Small orders welcome.

3. No MOQ, 1 piece is OK

4. ISO9001: 2000 certified

5. Accept 7-day refund

6. OEM & ODM, help design the product or assembly free of charge

7. More than 20 years experience

8. Low cost for the mould, and competitive price for the product but high quality

9. Accept small mold, treat as earnestly.

10. Machine jobs per customers instruction, but will send proposals when needed

11. Help customers complete the product or assembly for free

FAQ

Q: What's kinds of information you need for quote?

A: Kindly please provide the product drawing in X-T, STEP or IGS

Q: what's the payment terms?

A: We accept T/T 50% as payment deposit, when the goods is done, we take photoes for your check and you then pay the balance.

Q: How to delivery the goods?

A: We deliver the products by courier company

Q. Are you a trading company or factory?

A: We are direct factory with 10 experienced engineers and more than 50 employees as well approximate 2,000 square meters workshop area.

Q. What shall we do if we do not have drawings?

A. Please send your sample to our factory,then we can copy or provide you better solutions. Please send us pictures or drafts with dimensions(Length,Hight,Width),CAD or 3D file will be made for you if placed order.

Q. Will my drawings be safe after sending to you?

A: Yes, we will keep them well and not release to third party without your permission.

Q: Is it possible to know how are my products going on without visiting your company?

A: We will offer a detailed production schedule and send weekly reports with digital pictures and videos which show the machining progress.

Q: If you make poor quality goods,will you refund our fund?
A: As a matter of fact, we won't take a chance to do poor quality products. Meanwhile, we manufacture goods quality products until your satisfaction.