Silicone watch strap

1. Watch types

In general, there are three main kinds of watches, smart watch, quartz watch, and mechanical watch. We can not only use smart watch to look at time. What’s more, it has functions of listening to music, watching the video, calling, watching photos and so on. Smart watch has greatly facilitated and enriched people’s lives, and provides us with excellent service. However, a quartz watch uses a battery to support the rotation of watch hands. Of course, it doesn’t have such strong functions as smart watch. Generally, people can use it to know time and calendar. By the way, Watches have lug width between 18mm and 20mm. And the average wrist size of a man is 7.25.

The biggest characteristic of the mechanical watch is that its power is not provided by electricity. And the power is provided by the swinging of people’s hands. As we all know, man regards the mechanical watch as eternal art that can be handed down from ancient times. Therefore, its price is high, and can even be up to hundreds of thousands of dollars. And at the same time, there are many details that need to pay attention to when owing a mechanical watch. For example, we can’t run and play sports with it on our hands. Sometimes, it may have a big random error, and we need to adjust it.

Inside of watches including stainless steel buckles, spring bars, soft silicone. If you want to buy a watch, pay attention to them.

Some types of watches are famous. If u wanna buy some high quality or free shipping silicone replacement sports watch band for Apple Watch series, think about the silicone band. And TAG Heuer is one of the world’s leading luxury watch brands,Samsung gear s3 frontier smartwatch is very popular, etc.

2. Silicone band manufacturer

As strap band manufacturers all know, a complete wristwatch consists of a watch and a custom wristband. Generally speaking, we mainly use leather, rubber, nylon, and metal as a material sport watch.

Of course, silicone quick release watch bands include gold watch band, silver watch band, titanium watch band, ceramic watch band and so on. And there is another soft leather strap

material including alligator leather strap, buffalo watch band, canvas rubber straps, nylon watch strap, rubber silicone watch bands and so on. The rubber watch band is a kind of soft and smooth silicone strap and is sticky to man’s hand. What’s more, silicone watch bands are totally waterproof. Therefore, they have mainly used for dive silicone straps and sports silicone wristbands. Xuzhou Industrial Co., Ltd is a silicone band manufacturer. And we can provide a quality rubber sport band with many different colors. For example, camo silicone bracelets, purple silicone bracelets, white silicone bracelets, black silicone bracelet and so on.

3. Silicone wrist watch band introduction

There are mainly two kinds of silicone material, organic silicone, and inorganic silicone. And the organic silicone can be divided into silicone material, silicone resin, and silicone oil. Generally speaking, the sports watch material we usually use is a kind of rubber, which we call RTV silicone(room temperature vulcanized rubber). The raw material for producing Silica gel includes silica fume, methanol, and hydrochloric acid. And we can finally get watch band material of Silica gel through a series of complex chemical processes. The molecular weight of this kind of Silica gel material is low, and it’s liquid under the room temperature. Therefore, we also call it liquid silicone rubber.

At first, we mix cross-linking agent and platinum catalyst in liquid silicon. Then, the silicone mold manufacturer inject the mixture into the custom injection molds. After a period of vulcanization reaction, it can be solidified to a certain shape. Generally, the vulcanization reaction of liquid silicone rubber molding can be carried out at a normal temperature. Therefore, the silicone band manufacturer calls it RTV silicone(room temperature vulcanized silicone rubber). Also, we can slightly heat the material and get RTV silicone high temp to enhance the reaction speed. Sometimes, we want to get conductive silicone material of different to specify gravity, silicone shore hardness, strength, colors, and texture. We can help to realize it by using different additives.

4. Difference between silicone rubber and organic rubber

When comparing the rubber materials with general pure organic rubber, we know that the silicone material has a better resistant performance of high and low temperature. And the traditional rubber will be frozen and crispy and lose the function as a silicone seal. Of course, it’s under the circumstance of outer space where the sunlight can’t reach.

Therefore, the raw rubber that Silica gel manufacturers develop as aerospace material has a featured property. It has silicone elastomer properties of heat and cold resistance. No matter it’s in the extreme environment of rubber high-temperature 300℃ or Silica gel low temperature -90℃. It can both keep the chemical structure and won’t lose original flexibility. Compared with natural rubber material, it also has no bacterial growth. What’s more, it’s surface tension is very low, not easy to be soaked by sweat and rain. Therefore, the service life of Silica gel products can be up to several decades in the natural environment.

5. A project of silicone watch straps by Xuzhuo Industrial

5.1. The change of wristband design

5.1.1 Current situation investigation

A.We design the silicone bracelets middle plate of the first die mold with three positioning columns.
B.As we silicone wristband manufacturers know, three points can position a plane. There are three positioning columns for silicone wristbands, which have satisfied the limitation of four degrees of freedom in the X/Y direction.
C.When we follow our client’s requirement of three positioning columns for custom silicone bracelets, there are some problems. Through the actual operation of the silicone production line, we found that the middle plate always crushed the die mold.

5.1.2 Analysis of causes

A. The position areas of the three compound die positioning columns are too short. In the whole silicone rubber molding process, there is a process that the medium plate of die and mold slowly descends. When it has gone through the guide area and begin to enter the position area, the lower die forming the surface of the medium plate is ready to touch the bottom die.
B. The station of the injection molding machine is not stable enough.

5.1.3 Solutions

A.Changing the three positioning columns of the press dies to four. We can achieve the high precision of personalized wristbands by over positioning it.
B.Increase the die mold length of the location area from 6.99mm to 23.99mm.
C.Increase the thermoforming mold length of the safety area from 2.49mm to 5.49mm.
D.By changing these sport strap designs, no more cases that the middle plate crushes the die and mold occurs while using the subsequent replication injection molds.

5.2 Removing trace combination

5.2.1 Current situation investigation

A.We packed the core and made a real match of the silicone watch strap. After that, we found that there was an uneven mark of silicone molding material combinations in the window position.
B.Rubber style straps are once forming with two kinds of silicone wrist watch band material of different silicone hardness. The weight of 70° silicone molding material is 4.5 grams, the weight of 40° silicone rubber material is 7.5 grams. And the weight of each cave is 12 grams.

5.2.2 Fishbone analysis method:

A.Man: The way of marker making that injection molding operator use is unclear. There is may no guide for viewing and layout.
B.Machine: The pressure on the injection mold machine is abnormal. It’s because the setting pressure is beyond the specification.
C.Material: The silicone hardness of two silicone molding material is different. Our customer requires that these two silicone material of different silicone shore hardness are once forming.
D.Method: The method of marking making during the die forming process is incorrect.
E.Environment: Nothing.

5.2.3 Experimental analysis

A.When we use one silicone material for luxury silicone sports, only 40° forming die material or 70° material rubber strap, there is no mark in the connection position.
B.If we use two injection mold materials of different silicone shore hardness, there will be indentation while installing the mechanical movement.
C.Conclusion: There won’t be indentation if we use the elastomer material of only one silicone hardness.

5.2.4 Analysis of cause one:

Silicone watch strap maker uses two different colors thermoforming mold material to form the rubber strap and simulate the material layout method. If we don’t put the 70° wristbands silicone material into the center of the die mold core, below is the appearance picture after die making the process. The custom silicone wrist bands were not the area where it should be.

Place the 70° customized wristbands material into the center of the die mold core, then the effect is as we expected.

Therefore, we can confirm that our injection molding operator places the raw material into the center of the mold core. Then the 40° Silica gel material won’t permeate into the window position.

5.2.5 Analysis of cause two:

We place the silicone material of different weight into the center of the compound die core. We find that when we use the lightest 70° material, the problem occurs. 40° raw material will permeate into the window position where there should be only 70° Silica gel material.

We simulate the normal silicone production and layout the material of silicone rubber straps. When we put the material a little bit aside of the silicon silicone watch bands die core, the problem happened if we use materials which weight is 4.5g or 5.0g. And the condition that 40° silicone wrist watch band material permeates into the window position will be worse by using 4.5g 70° material. But if we add the weight to 5.5g, the phenomenon disappears. Therefore, we find the most suitable weight of silicone material, and we choose 5.5g there.