Archive for the ‘Snap domes’ Category

Several factors affect the quality of the metal dome

Tuesday, July 29th, 2014

In today’s society, there are a lot of customers are not well know the metal dome,just know more cheaper more better. But this is actually one of the biggest mistakes, so we should see several factors affect the quality of the metal dome .

Metal dome is an important part used in membrane switch, PCB boards and other products, has played an important role in conducting circuit, when you press, the line will be turned on, when you release it will automatically disconnect. If the metal dome has a problem, it will affect your product, or even a brand of your company’s. So I would like to tell you to pay attention to the following items:

1, The metal domes life:

Nowadays there are a lot of metal dome life is not up to standard, four-leg only 200,000 times to 300,000 times, the price is relatively cheap, but life can be achieved in the 500,000 to 1,000,000 times we make, and round metal dome, like 4C, C5 small dome, domestic only 700,000 to 800,000 times life, the price is relatively low. Our C4, C5 can react to 1,000,000 times.

2, The metal domes force:

Metal domes force is the most stringent requirements of foreign customers, that is speaking to each metal dome force is used to be uniform, can not have one high and one low and to be controlled at a certain tolerance (±30gf).

3, The metal dome material:

There are three kinds of material: domestic materials, South Korean materials, and Janpan material.  The metal dome biggest weakness is “Dead Key”. It’s very difficult to see which better from the appearance of the materials, we onlt can find the better from the testing.

4, The metal domes appearance:

When selecting metal domes, pay attention to the appearances if have dirt, scratches, grease, crushing, etc. ……

Our company is specialized in producing metal domes, our products have more than 80% of exports to the overseas marketing, and we have also opened the domestic customers in recent years. Our four-leg metal dome, life can reach 500,000 to 1,000,000 times, especially 4C, 5C round metal dome, has a real one million times life,and the force can be controlled within (± 15gf) range.

We are according to high-quality, high-service, fast-deliverytime, and good price for our customers. CMD Manufacture Co., Ltd. is a professional production of metal domes in China! ! !

Do the different shapes and diameters snap domes can make into one metal dome array?

Wednesday, December 4th, 2013

Do the different shapes and sizes snap domes can make into one metal dome array? Answer is yes. For example, round and oblong snap domes, cross and triangle snap domes can make into one metal dome array.

Why do customers have this request?

1, Maybe customers’ pcb board design problems. For example, it can not use round snap dome for single pcb board, so that we can use oblong instead of.
2, Different click feeling required. Some require higher force, others require better click feeling;
3, Rubber key size. That require the different diameter of snap domes.

Although this metal dome array that can be made, the process of making is a bit more complicated, we need to make two assembly toolings and more time to assmble.So you can see the price should be higher. Therefore, we recommend: if you don’t have special requirements, please use one shape and diameter snap domes.

Metal dome or snap dome or tactile dome is the same product?

Wednesday, August 28th, 2013

Do you know metal dome? Why we also can call snap dome, tactile dome? Do they are the same products?

Metal domes are widly used for the membrane keypad and swithces. The material of the metal dome is the stainless steel, and it looks like a dome, so we call metal dome. When we press the metal dome, it has crackling sound, so we also call snap dome. Tactile dome is the same meaning.

CMD Manufacture is the leading manufacturer of the metal dome, snap dome, and tactile dome in China, if you need more information, please do feel free to contact us.

What’s the metal domes material?

Monday, August 19th, 2013

The metal domes (snap domes) material is general use stainless steel. Stainless steel in various countries, in general, the Japanese SUS301 is used often, but sometimes also use SUS304 material. The difference between these two materials is the chemical composition,304 carbon ratio is higher, but the hardness is note better than 301, so it is generally to use SUS301 to make metal domes (snap dome). Of course, there are some other materials, such as phosphor bronze C5210, One side with silver SUS from Korea.

The proper selection of materials is very improtant for product quality of metal domes(snap domes),if improper selection hardness of the material, it will generally result in “Death KEY” phenomenon (pressing down, then metal dome disappear automatically pops up function).We can’t find out this issue in short-time used and with eyes,we need life test machine and force test machine to test the result.

Our company has a professional production experience, so the choice of materials and incoming detection testing standards will be strictly in accordance with the strict inspection of incoming inspection, so our metal domes(snap domes) have maintained excellent quality.