The mahogany door and the hardwood door are two products of the industry. Although the quality and performance of the products are higher than other types of wooden doors, they need to be well maintained. Let's take a look at the technical formula to prevent the deformation of mahogany and hardwood.
The method for preventing the deformation of mahogany doors and hardwood doors is a technical invention involving human life necessities, such as rosewood, rosewood, wenge, rosewood and other precious hardwoods, which are commonly known as mahogany, belonging to legumes and deciduous trees. Because of its hard texture and stable color, the wooden doors and other products have obvious characteristics such as corrosion resistance, wear resistance and thick appearance, so they have always been favored by people. However, these precious hardwoods, like other solid woods, are prone to warping and cracking due to the influence of the external environment such as climate.
Thereby seriously affecting the appearance and use effect of the mahogany products. The main cause of wood deformation is the moisture and resin content of the wood itself. They continually expand and contract with changes in temperature and humidity. For this reason, artisans have been trying to pretreat wood in various ways before the production of the product to reduce the water content and the amount of fat in the wood to stabilize the properties of the wood. Commonly used treatment methods include blisters, drying methods, and the like. However, based on the special nature of the precious hard wood, the effect is not obvious, and these methods have a long construction period and a large amount of wood wastage.
The main cause of wood deformation has been found. For the technical disadvantages of traditional pretreatment, a new method of wood pretreatment has been introduced through repeated experiments: the wood is heated in a special solution to quickly evaporate the water in the wood. The solvent dissolves the resin in the wood, and the paraffin enters the capillary pores in the middle layer of the wood table at a high temperature state, and is cooled and solidified to be filled in the capillary pores, thereby preventing external moisture from entering the interior of the wood again, thereby effectively preventing The deformation of the wood, the pretreatment of the precious hard wood by the invention can stabilize the deformation of the wood in a short time, and the wood product is no longer deformed, thereby greatly broadening the applicable area of ​​the valuable hardwood.
Moreover, the process of the invention is simple and easy, and the treatment cost is low. The treated wood not only has low water content and low fat content, but also has a finer wood surface, which is favorable for lacquering and waxing, and better preventing mildew and mites. Through more than five years of follow-up observation of the implementation of this invention in the mahogany door, its products have no instability such as cracking and warping in the northern part of the climate or the relatively humid south, which fully proves this method. It works well. The operation steps and specific implementation methods of the present invention are now described as follows:
The method to prevent the deformation of expensive hardwood is as follows
1. Paraffin is added to the solvent, and the weight ratio is solvent? Paraffin = 1? 0.1-1.5.
2. The mixture is placed in a container and heated until the paraffin is dissolved. No open flame can be used, and stirring is continued during the heating.
3. Put the wood billet into the above solution, and clamp the billet with a clamp to maintain the original shape. According to the water content and size of the wood, the temperature is raised to 100 °C - 105 °C in 2-10 hours, and the temperature is kept for 2-10 hours.
4. Raise the temperature to 115 ° C - 120 ° C, keep warm for 2-3 hours, naturally cool to 60 ° C - 80 ° C, remove the wood from the solution, and wait until it is completely cooled. The solvent in the above method is a solvent oil or a petroleum product.
In the fourth step of the above method, the solvent may be continuously added during the heating process to adjust the paraffin content in the solution so that the solvent to paraffin content ratio is: solvent paraffin = 0.1 to 1.5.
Invention example for preventing deformation of valuable hardwood
Example 1: Take 1 part of 200# solvent oil, add 0.3 parts of paraffin, and heat the mixture to 80 ° C. After the paraffin is dissolved, put the wood, heat it to 105 ° C, keep it for 8 hours, adjust the ratio of the solution to solvent. 1 part of oil, 0.1 part of paraffin, heated to 120 ° C, kept for 2 hours, then naturally cooled to 69 ° C, taken out and cooled.
Example 2: First, take 1 part of 5# white oil, add 0.2 part of paraffin, and heat the mixture to 80 ° C. After the paraffin is dissolved, put the wood, heat it to 105 ° C, keep it for 8 hours, adjust the solution ratio to solvent. 1 part of oil, 0.1 part of paraffin, heated to 120 ° C, kept for 2 hours, then naturally cooled to 69 ° C, taken out and cooled.
Example 3: 1 part of kerosene was taken, 1.2 parts of paraffin was added, heated to 85 ° C, placed in wood, heated to 117 ° C, kept for 2 hours, and naturally cooled to 70 ° C to be taken out.
The names and specifications of the wood used in the above examples and the results after treatment are shown in the attached table. The water content before the wood treatment is about 15%. After the fatigue test such as standing, drying and freezing after treatment, the water content is less than 6%. The treated wood has a small shrinkage in length, so it is negligible, and the expansion ratio of the thickness is substantially the same as the expansion ratio of the width, so only the width is listed. [ Follow the WeChat public account "Jiuzhengmen Window Network"; pay attention to courtesy, scan code to send millions of business opportunities! Jiuzhengmen window network exchange group ]
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