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What is the required pressure for 20% of the seal compression?

What is the required pressure for 20% of the seal compression?

Sealing rings are common parts in mechanical equipment, and their role is to prevent liquid or gas leakage. In the actual use process, the compression of the sealing ring is an important parameter, which directly affects the sealing performance of the equipment. So, if we want the seal compression to reach 20%, how much pressure do we need to apply?

First, we need to understand how the compression of the sealing ring is calculated. In general, the compression of the seal refers to the difference between its initial height and the height after installation, which is generally expressed in the form of % (percentage). For example, a sealing ring with an initial height of 10 mm and a height of 8 mm after installation has a compression of 20%.

So, how much pressure is needed to make the compression of the seal ring reach 20%? The problem is complicated because different types and sizes of seals require different pressures. In general, the compression of the sealing ring is proportional to the pressure applied, that is, the greater the pressure, the greater the compression.

To simplify the calculation, we can estimate the required pressure using the following formula:

P = F / A

Where P represents the required pressure, F represents the force applied to the sealing ring, and A represents the contact area of the sealing ring. According to this formula, we can calculate the required pressure and choose the appropriate tools and equipment to apply the force.

It should be noted that applying too much pressure may cause deformation or damage to the sealing ring, so it needs to be handled carefully in actual operation. At the same time, in order to ensure the good sealing performance of the equipment, the adjustment and installation of the seal ring is also required to operate in strict accordance with a series of standards and requirements.

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Why does the surface ink of silicone products fall off easily?

Why does the surface ink of silicone products fall off easily?

Silicone products manufacturers
Silicone products are beautiful, because you can spray a variety of patterns on the surface, but many silicone product manufacturers in the spray, the pattern ink is easy to fall off, what is the reason? This article will explain some points that need to be paid attention to when spraying.

First, use special silicone spray ink

This is very important, if you take plastic spray ink to spray, it will definitely fall off, because different materials corresponding to the ink is not the same. Many customers encounter this problem, they can not find a professional silicone product manufacturer, may be the plastic factory packaging silicone products, plastic factory directly with inkjet spray onto the silicone products, the spray method is the same, but because the material is different, the effect is completely different.

Second, the surface of the product must be cleaned before spraying

It is necessary to dispose of the dust impurities on the surface, etc. If the PU is sprayed, the surface should also be treated with flame or discharge to ensure the ink fastness. If not cleaned, the effect of spraying on the surface will be poor.

Third, the surface of the product directly spray dyeing ink

To make the spray pattern more firm, transparent color sensitive oil, light oil, PU oil, etc. will be sprayed on the surface, so that the color will not fade easily, and there will be no color oil.

Silicone product injection process seems simple, but the above points deserve special attention. It is also important to choose the manufacturer of silicone products,

 

If you are interested in the above silicone rubber products or have questions, please click to contact our online customer service or telephone union, Aobo silicone rubber – 23 years of focus on precision automotive medical silicon rubber products source manufacturers。

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Liquid silicone injection molding should pay attention to what?

Liquid silicone injection molding should pay attention to what?

The difference between liquid silicone and solid silicone

Liquid silicone is a kind of flexible thermosetting material, non-toxic, heat resistant, high resilience. Compared with solid high temperature vulcanized silicone rubber, it is a liquid silicone with good fluidity, fast vulcanization, safer and more environmentally friendly, and can fully meet food grade requirements. In addition, liquid silicone products are soft and hardness can reach 10°C-40°C. Due to its soft properties, it is widely used in the simulation of human organs and medical silicone breast pads.

LSR is a two-liquid rapid vulcanization material with platinum as catalyst, which can be produced by injection molding, mass, rapid vulcanization, and repeated machinery. Its products have good thermal stability, cold resistance, excellent electrical insulation properties, and will not produce toxic substances when burning. However, due to the high expansion coefficient of LSR, it expands when heated and shrinks slightly when cooled. As a result, parts cannot maintain precise side spacing in the mold.

In addition, the cured LSR is easy to stick to the metal surface, the more common release technology includes thimble and air push, liquid silicone is divided into A glue and B glue, the use of quantitative devices to control the ratio of 1:1, injection injection molding production, liquid silicone into the hot channel mold, manufacturing silicone products, can be formed without waste and automation.

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How does TC frame oil seal work?

How does TC frame oil seal work?

What is the working principle of TC skeleton oil seal?
How does the skeleton oil seal work?

Let’s take a look with questions. Let’s look down:

When the skeleton oil seal is in a free state, the inner diameter of the lip of the seal will be smaller than the shaft diameter and there will be a certain amount of interference. After installation, the interference pressure of the cutting edge of the seal will produce a certain radial tightening force on the rotating shaft (if the thickness is too small, dry friction may occur, resulting in wear between the seal and the rotating shaft). After a period of movement, the pressure will be rapidly reduced, and the contraction force of the self-tightening coil spring can compensate for the self-tightening force of the seal at any time, and the combined effect of the two is to produce radial pressure. At work, the lip of the oil seal will form a 0.2-0.55mm wide seal under the action of radial pressure and will contact the ring belt. However, under the action of lubricating oil pressure, the oil will penetrate into the cutting edge and the rotating shaft to form a thin oil film, in order to prevent the leakage of the working medium. Warm reminder, the sealing capacity of the skeleton oil seal will be determined according to the oil film thickness of the sealing surface.

If you are interested in or have questions about the above skeleton oil seal, please click to contact our online customer service or telephone, Aobo silicone rubber – 22 years of focus on precision automotive medical silicon rubber products source manufacturers

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What are the materials of O-ring seals?

What are the materials of O-ring seals?

As a professional manufacturer of O-ring seals, today Xiaobian will introduce the material and some characteristics of O-ring seals.

Do you know what kind of rubber material the O-ring is made of?

O-type sealing ring is a kind of sealing product with simple structure, many specifications and great quantity. The sealing quality life of the O-ring depends on the dimensional accuracy and the rubber material. Generally, the adhesive material is required to have a certain mechanical strength, tear resistance, good heat resistance, oil resistance, chemical medium resistance, and small compression deformation under the conditions of use, which is the main index.

What material is the rubber material of the O-ring? The sealant of the sealing ring can actually be divided into many different materials according to the requirements of use and the working environment.

According to the requirements of customers, generally have heat resistance, oil resistance requirements, the use of rubber material to nitrile rubber. Acrylic rubber can be used for oil resistant sealing products requiring higher temperatures. Fluororubber for oil resistant rubber products requiring higher temperatures, and silicone rubber for heat resistance. When the working pressure is high, the way to increase the hardness of O-ring rubber material is to increase the filling amount of carbon black, but the filling amount is too high, it is difficult to mix, and damage the basic physical properties of vulcanized rubber, but also make the rubber material easy to char.

In the case of the use of the same rubber, such as nitrile rubber, in order to improve heat and oil resistance, reduce compression deformation, peroxide vulcanization system or effective sulfur vulcanization system can be used. These two vulcanization systems can generate more carbon-carbon bond crosslinked structure and single sulfur bond crosslinked structure, effectively improve the heat resistance and oil resistance of vulcanized rubber, and reduce compression deformation.

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The role of electronic cigarette holder silicone sleeve?

The role of electronic cigarette holder silicone sleeve?

 

What is electronic cigarette holder silicone sleeve?

1, electronic cigarette holder silicone sleeve is made of silicone rubber raw materials, soft texture, elastic, wear-resistant, food grade silicone rubber can be directly imported, so it is selected as an electronic cigarette holder.

2, at the same time, the silicone sleeve of the electronic cigarette holder is also soft and elastic because of its material, it can be completely set on the electronic cigarette without affecting its use function, and it is strong plasticity, and can be designed into a variety of different shapes, diverse styles and rich colors.

What are the advantages of electronic cigarette holder silicone sleeve?

1, high temperature resistance: applicable temperature range -40 to 230 degrees Celsius, can be used in microwave ovens and ovens. It can also be refrigerated.
2, easy to clean: the electronic cigarette holder produced by silica gel can be recovered after rinsing with water, and can also be cleaned in the dishwasher.
3, long life: the chemical properties of silicone material are very stable, and the products made have a longer life than other materials.
4, soft and comfortable: thanks to the softness of silicone material, cake mold products feel comfortable, flexible, no deformation.
5, color diversity: according to the needs of customers, the deployment of different beautiful colors.
6, environmental protection and non-toxic: from raw materials into the factory to finished products are not produced any toxic and harmful substances.
7, electrical insulation performance: silicone rubber mold has a high resistivity, and its resistance can remain stable in a wide temperature range and frequency range. At the same time, silica gel has good resistance to high voltage corona discharge and arc discharge, such as high voltage insulators, TV high voltage caps, electrical parts and so on.

 

What is the use of silicone sleeve for electronic cigarette holder?

Filtration, filter out the harmful substances of tobacco species themselves (pull) unscrew the nozzle of the atomizer, and add the soot along the wall of the atomizer by adding two-thirds of the soot, and then (pull) screw back the cigarette holder.

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Can silicone rubber sealing ring mold line be made without burr edge?

Can silicone rubber sealing ring mold line be made without burr edge?

Silicone rubber seal ring

Received a lot of customer drawings technical requirements, requiring the product line to do no raw edge, because many projects often do not carefully review the technical requirements of 2D drawings when receiving drawings, it seems very simple a silicone rubber sealing ring, the product unit price is reported to the customer in a few minutes, so that when the project case is received later, Only to see that the technical requirements of the drawing are that the sealing ring closing line should be made without rough edges, at this time, we can not communicate with the customer technology, so that the customer will think that we are not professional. Then let me popularize the silicone rubber sealing ring closing line can be achieved without burr edge?
The answer is: no rough edge can be achieved, but to achieve no rough edge in the silicone rubber sealing line is to meet the following requirements:
1, the silicone rubber sealing ring mold precision, the current solid mold is basically unable to do, it can only be liquid mold, liquid mold is not just a set of liquid mold can do no closing line, this has to pay attention to the accuracy of liquid mold, normal to do no burr liquid mold is expensive, about hundreds of thousands of a set of estimates.
2, even if the accuracy of the liquid mold is reached, there is another condition is the equipment, excellent liquid injection molding equipment, if the equipment can not meet, even if the mold accuracy is reached, it is not possible to do the product without burring line.

3, the remaining is the engineer’s machine technology, even if the mold accuracy is reached, the equipment is good, if the engineering technology is not good, the same can not do the mold line without raw edge.
The above three points must be met in order to achieve the technical requirements of the silicone rubber sealing ring mold line without burrs, the right time, the right place and the right person.
That many fans are curious about the normal operation of the silicone rubber seal mold line is how much can be done?
So there are two different mold structures
1, solid mold, normal solid structure of silicone rubber sealing ring mold line raw edge can be 0.08 is very good
2, the liquid mold, the normal liquid structure of the silicone rubber sealing ring mold line can be 0.05 is very good
If you want to make the mold line more perfect, there is another way to take it to grind, but grinding is risky, easy to break the sealing ring, then there are many fans will ask, can not take it to freeze the rough edge? Of course it can. I’m talking about freezing the rough edge after the mold line is even more perfect. So don’t confuse rough edges with plain edges.
The above is a small series of personal industry in some of the views, if you have different opinions can comment area together to learn to discuss oh

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O-ring use and maintenance need to pay attention to what?

O-ring is mainly used for pneumatic and hydraulic systems and all kinds of mechanical equipment and components, in the specified pressure, and temperature and different liquid and gas medium, in the static and moving state can play a sealing role, silicone sealing ring is mainly used for fresh rice box, insulation box, water dispenser, lunch box, rice cooker, incubator, milk cup, electric oven, Coffee kettles and other daily necessities are used to waterproof, seal and keep fresh.

The use and storage of O-ring should pay attention to the place

1. O-ring can not be reused under normal circumstances.

2. when the O-ring into the groove, should be careful not to let the O-ring distortion sealing ring.

3. When installing O-rings, you can consider applying more sealing media to grooves and O-rings.

4. O-ring in the case of not open the original package of O-ring liquid silicone, so as to avoid O-ring will stick to dust or mixed with foreign bodies, so that it may cause O-ring damage.

If you are interested in the above O-ring or have questions, please click to contact our online customer service or telephone union, Aobo silicone rubber – 22 years of focus on precision automotive medical silicon rubber products source manufacturers.

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How to customize O-rings without repeating?

       The production process needs to be completed by strict production process from drawing design to mold opening to rubber mixing. What are the general processes for customers to customize and produce silicone products? The production process of silicone products is as follows:

1、 Drawing design, mostly according to the sample size provided by the customer, using a variety of three-dimensional drawing and three-dimensional drawing software to produce, if the customer does not have samples, we will cooperate with the customer to complete the drawing according to the relevant needs of the customer.
2、 the development of the mold, the opening of the sealing ring mold by the mold master according to the design drawings and programming level, completed on the CNC machine, if the difficulty is higher, it needs to use the spark machine to make the mold, so in the manufacturing technology of the content of silicone products is relatively high, the production cycle time will be longer, Generally, the delivery time of large mold is calculated according to 11 days.
3、 color mixing rubber, according to the color specified by the guests to match the color, silicone sealing ring required materials are environmentally friendly silicone, hardness from 30 degrees to 80 degrees according to demand to choose.
4、 For mold production, the production can only begin after the mold is installed on the molding machine table and the temperature is heated to the appropriate temperature. The output value of one machine is about 150,000 pcs per day.
If you are interested in the above silicone sealing ring or have questions, please click to contact our online customer service or telephone union, Aobo silicone rubber – 22 years of focus on precision automotive medical silicon rubber products source manufacturers
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What is the cause of the breakage of the O-ring?

                 O-ring has good elasticity and compression performance, which can effectively prevent the leakage of the medium and is widely used in the sealing field; It is because of its widespread use that sealing rings are used. It is because it is very widely used, so the sealing ring is used in a variety of environments and uncertain factors. Now what are the reasons for the damage of the O-ring?

There are many reasons for the damage of O-ring, such as the diversity and uncertainty of our use environment, which may lead to the damage of O-ring. Here are two common reasons

1, sealing ring overload: each material and product has its own load, if it exceeds the load limit of the product, there will be damage, fracture, deformation and other phenomena. Therefore, it is necessary to consult relevant information when doing product design to see how much the load of the product is and whether the product has been overloaded.

2, O-ring material aging: sometimes material aging will be one of the reasons for silicone ring damage, each material has its own life, long-term use has been aging silicone ring will be prone to damage phenomenon. So we should often check the use of silicone sealing ring, service life has reached a critical value.

If you are interested in the above silicone rubber products or have questions, please click to contact our online customer service or telephone union, Aobo silicone rubber – 22 years of focus on precision automotive medical silicon rubber products source manufacturers

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