What can cause moldy wood lid

Improper use of wood lid is likely to cause mold, so we have to look at the small coups for wood lid moldy treatment, and see if there is any way to prevent wood lid mold.

Generally speaking, the mildew on the wood lid can be removed with milk, alcohol, ammonia, potassium permanganate and sodium bisulfite. Generally speaking, mildew spots appear, which are usually caused by the wood lid absorbing more water. If the surface is only treated, regardless of the root cause to prevent water absorption, the mildew spots will still appear in the future. To really remove the mildew spots, stop the water source and keep ventilation. Smooth let it dry naturally, there is water in it.

Generally, you can try to use mildew spray, or bleach, which is a kind of thing that uses the strong oxidizing property of hypochlorous acid to oxidize and bleach. Moldy and blackening are generally caused by the residual melanin metabolized by mold cells and molds on the wood. Cleaning agents are effective, but they will also leave more obvious dark spots.

To prevent mildew on the wood lid, we must start from the most fundamental point, that is, start with prevention. To prevent the occurrence of mildew, we must understand the cause.

Causes of moldy wood lid

1. Because the general wood fiber contains protein, starch, oil, cellulose, etc., wood is very suitable for mold production and reproduction. This will cause some woods to be prone to mold due to the different content of different wood components, and some woods are not. Easy to mold.

2. In spring, the temperature rises, the air humidity is high, and the mold multiplies quickly. Therefore, spring is the peak period for furniture mold.

3. The wood lid itself has a relatively high humidity, and it is less moldy when it is dry, but it is easy to mold when the humidity is greater than 20%, so fresh wood must be treated with mold

4. The surrounding air is fluid, and the airtight environment accelerates the growth of mold and is more likely to cause mold. If the air circulation is good, it will be better.

 

What are the main points of pvc pipe installation and construction?

In order to ensure a better use environment for PVC pipes, PVC pipe manufacturers can avoid external loading and achieve the expected service life, so the pipes are arranged and laid reasonably. In order to ensure the scientific rationality of the installation, the installation design principles must be followed when installing the PVC pipe.

1. The pipeline is generally suitable for open installation. In places where the pipeline may be collided, it is more suitable to conceal or take protective measures. The exposed water pipe is more suitable to be arranged on the wall, corner or column near the sanitary appliance or equipment with large water volume. PVC water supply pipes cannot pass through bedrooms, storage rooms, flue ducts and air ducts.

2. Lay the water supply pipe in a place exposed to sunlight outdoors. At this time, light materials should be used for heat insulation. When the pipeline is darkly applied, it is strictly forbidden to touch organic chemicals such as waterproof paint to avoid affecting the water quality and damaging the pipeline. When the pipeline passes through the roof and basement, metal waterproof flexible casing and effective waterproof measures should be set up.



3. When PVC water supply pipes are laid in parallel with other pipes in the same ditch (rack), they are suitable for laying along the side of the ditch (rack), and when laid up and down in parallel, they cannot be laid on the hot water pipe or steam pipe, and the plane position Should be staggered; when laying across other pipelines, protective measures or metal casings should be used.

4. The PVC water supply pipeline should be far away from the heat source. The net distance between the standpipe and the stove side should not be less than 400mm, and the net distance from the heating pipeline should not be less than 200mm, and the outer wall temperature of the pipe should not be higher than 40℃ due to the heat source radiation. The installation of PVC pipes does not follow the steps blindly. In order to ensure the long-term use of PVC pipes and reduce the occurrence of failures, all pvc pipe manufacturers need a certain design when installing. The design of the above principles is summarized because of these factors.

 

How to design a reasonable extension springs?

With the development of extension springs application technology, more requirements are put forward for extension springs materials. The first is the forward fatigue life under high stress and the anti-slack function; the second is the corrosion resistance, non-magnetic, electrical conductivity, wear resistance, heat resistance and other aspects according to different uses. Therefore, in addition to the development of new varieties of extension springs materials, favorable results have been achieved in terms of strict control of chemical composition, reduction of non-metallic impurities, and improvement of surface quality and dimensional accuracy.

(1) Development of the production process of extension springs steel. In order to advance the quality of extension springs steel, the industry has generally selected out-of-furnace refining technology, continuous casting process, new rolling and online automatic detection and control equipment.

In order to ensure the chemical composition of steel and reduce the content of gases and various non-metallic inclusions, a large-capacity electric furnace or converter is used for smelting, and a ladle outside the furnace is used for refining to reduce the oxygen content (mass fraction) to (0.0021~0.0010)%. Produce ultra-pure steel, and then greatly advance the planning and operating stress of extension springs.

The continuous casting production process has been selected in the production of extension springs steel. Continuous casting can reduce the segregation of steel, reduce secondary oxidation, improve surface decarburization, and make the arrangement and function stable and uniform through techniques such as electromagnetic mixing and low-temperature casting.

The use of a split full continuous rolling mill can improve the dimensional accuracy and surface quality, and at the same time, the steel can be arranged uniformly along the length. In the rolling process, in order to ensure the surface quality of the product, online automatic detection and control are selected. In order to adapt to the production of variable cross-section extension springs flat steel, a new austenite rolling process has been developed, that is, the steel is heated and then rapidly cooled to the metastable austenite zone for plastic processing and quenching. This process allows the steel to advance its strength without reducing its plasticity. In addition, the function of extension springs steel is advanced by online heat treatment and surface hardening treatment after rolling.

(2) The development of alloy steel The primary function of alloying elements is to advance mechanical functions, improve process functions and give certain special functions. SiCr steel has been used for valve extension springs and suspension special-shaped springs. Si is an anti-stress slack alloy element. The addition of V and Mo to SiCr steel constitutes SiCrV and SiCrMo steels, which can improve fatigue life and anti-slack function. At the same time, the SiCr drawn wire has better anti-laundering function when working at high temperatures than piano wire and important-purpose carbon extension springs. With the high-speed miniaturization of engines, Ti alloys with good anti-vibration performance, light weight and small elastic modulus have been widely used, and their strength can reach 2000MPa.

 

How to remove the rust on the candle metal lid

Generally speaking, to remove the rust of the candle metal lid, you can use various tools to shovel it off, or soak it in an acid solution to dissolve the rust of the candle metal lid. After removing the rust of the candle metal lid, the surface of the metal lid must be treated and plated with metal that is not easy to rust. A more thorough method is to add some other metals to the candle metal lid to make a stainless alloy. The stainless steel we are familiar with is an alloy made by adding a little nickel and chromium to the steel.

The commonly used methods to prevent the rust of the candle metal lid are:

(1) The composition alloy is used to change the internal structure of the candle metal lid. For example, adding metals such as chromium and nickel to ordinary steel to make stainless steel can greatly increase the rust resistance of candle scriptures.

(2) Covering the protective layer on the surface of candle metal lid products is actually an important method to prevent the rust of candle metal lid products. Generally speaking, it can be divided into the following types according to the composition of the protective layer. In candle metal lid products The surface is coated with mineral oil, paint or fired enamel, sprayed, etc. Or, the surface of the steel candle metal lid is coated with a layer of non-rusting metal, such as zinc, tin, chromium, and nickel, by electroplating and hot-dip plating. Eventually, a dense oxide film will be formed on these metal surfaces, which can prevent candle metal lid products from contacting with water, air and other substances from rusting.

(3) Keeping the surface of candle metal lid products clean and dry is also a good way to prevent rust. If the above does not help you, then you can try wrapping with plastic film to see how effective it is. Here are some protective measures:

1. Anti-rust paper anti-rust: Anti-rust paper is an economical and environmentally friendly anti-rust packaging material. It is generally used for the packaging, transportation and storage of small candle metal lids or non-metal parts; anti-rust The effect is rapid and easy to use. And it has the best moisture-proof, anti-rust and anti-corrosion functions. It also has the characteristics of long anti-rust time, safe use, beautiful packaging and low cost. It has been widely used and has now become an indispensable anti-rust material.

2. Anti-rust film anti-rust: take paint protection or wax spray anti-rust: wax spray is to spray a layer of wax protective film on the metal surface, which can isolate the metal surface from moisture to achieve the purpose of anti-rust. This method is simple to use, and is generally cleaned with hot water when cleaning. It is a safe and environmentally friendly one-time anti-rust material. In addition to the above methods, the storage environment of the candle metal lid should be kept dry, and the humidity should not be higher than 50%.

 

What are the advantages of automatic packaging machine?

 

Compared with the previous manual packaging, automatic packaging machine has obvious advantages. Therefore, many companies that require a large amount of packaging will choose this type of packaging machine, but do you know what advantages the vertical packaging machine has when it is used? ?
 
1. The automatic packaging machine can effectively complete the packaging action. The packaging process can follow the required shape and size according to the request of the packaged items, and obtain the packaging with the same specifications. This is not guaranteed by manual packaging.
 
2. Automatic packaging machine can replace manual packaging. Such as vacuum packaging, fully automatic bag-feeding packaging machine, inflatable packaging, skin packaging, isobaric filling and so on.
 
3. Decrease rest intensity and improve rest conditions. Manual packaging cannot be done 24 hours a day, and the rest is very intense. If you use manual packaging to package large and heavy products, it is labor intensive and unsafe. Packaging machines can solve this problem.
 
4. The automatic packaging machine can protect workers and keep them away from certain products that seriously affect their health. Such as severely dusty and toxic products, soothing and spray products, manual packaging will have a great impact.
 
5. The vertical packaging machine can reduce packaging costs and save storage and transportation costs. For loose products, such as cotton, tobacco, silk, hemp, etc., shrink packaging machines are used to shrink packaging, thereby reducing the space required for packaging and reducing packaging costs.