Что такое мдф в дверях: Двери из МДФ: что это такое

что это такое, плюсы и минусы, конструкция, фото и отзывы. Преимущества полотен из МДФ

Двери из МДФ – это прочные и сравнительно легкие конструкции, которые обладают хорошими внешними характеристиками. Такие изделия отлично сочетаются с разной фактурой и цветом отделки, поэтому часто используются в классических и современных интерьерах.

На сайте вы найдете широкий выбор недорогих межкомнатных дверей, выполненных из МДФ, со шпонированием. Мы предлагаем безопасную и экологически чистую продукцию, произведенную в соответствии с международными стандартами качества.

Преимущества товаров

МДФ – это плиты, спрессованные из древесной стружки. Материал экологичен и крайне практичен, поэтому готовые изделия обладают рядом преимуществ:

• Разнообразие оформления и оттенков. Простота обработки материала позволяет создавать лаконичные и оригинальные модели. Конструкции часто оформляются с использованием шпона различных цветов, дополняются металлической фурнитурой и т.д.
• Устойчивость к высокой влажности. Модели из древесноволокнистых плит нередко используются даже на кухне или в ванной комнате.
• Износостойкость. Средний срок службы дверных полотен составляет более 10 лет.
• Хорошая шумо- и термоизоляция. Изделия помогают улучшить звукоизоляцию комнат, обеспечивают комфорт и уют, благодаря чему часто используются в качестве второй входной двери.
• Экологичность. Конструкции выполнены с использованием качественных и натуральных материалов, не несут никакого риска для здоровья.

Заказ от производителя

Наша компания «Принцип» занимается изготовлением дверей из МДФ как эконом-класса, так и категории «средний» и «средний+». В каталоге представлено более 250 моделей различных расцветок и размеров, что позволит подобрать дешевый или элитный вариант для любой квартиры. Мы предлагаем выгодные цены на доставку и установку продукции в Москве, подробности уточняйте у нашего менеджера.

Вы можете самостоятельно купить понравившийся товар при помощи сайта или по телефону. Также будем рады видеть вас в наших розничных магазинах!

Сегодняшний рынок дверей заполнен различными моделями и типами дверных конструкций. Все они выглядят привлекательно, но отличаются по способу и материалам изготовления. Двери МДФ являются довольно популярными среди покупателей, так как отличаются не слишком высокой ценой и выглядят при этом достойно.

Особенности дверей из МДФ

Двери МДФ изготавливаются из бруса древесины хвойных пород, который располагается по контуру двери, образуя каркас. Затем на него крепятся плиты МДФ, внутренняя полость заполняется сотовым картоном или оргалитом. Сверху плиты МДФ защищают различными покрытиями.

Межкомнатные двери МДФ в настоящее время являются лучшей альтернативой конструкциям из цельных массивов древесины

Аббревиатура МДФ расшифровывается как древесноволокнистая плита средней плотности. Плиты эти делаются из высушенных древесных волокон, которые в процессе изготовления прессуются до образования панелей нужной плотности. Для прочного соединения волокон используются карбамидные смолы, склеивающие их друг с другом. Чтобы волокна не выделяли вредные вещества, в состав добавляют меламины.

Плита МДФ — полностью экологичный и безопасный материал

Плита получается довольно прочной и устойчивой к влаге, воздействию высоких температур, на ней не растёт плесень и грибок, это делает её гигиеничной и удобной при использовании в быту

Видео: что такое МДФ

Конструкция дверей из МДФ

Общая схема изготовления двери МДФ всегда одинаковая. Однако компоненты могут отличаться.

1. Каркас — изготавливается из массива хвойных пород древесины (чаще сосна).
2. Наполнитель — в его качестве используют сотовый картон или оргалит.
3. Плиты МДФ.
4. Защитное покрытие. Может быть любым: ПВХ-плёнка, ламинат, шпон, экошпон и т. д.
5. Финишное покрытие. В его качестве могут выступать: лак, краска, меламиновая плёнка и др.

Принцип ценообразования на продукцию из МДФ напрямую зависит от её конструктивных особенностей

Конструкция дверей МДФ также зависит и от их типа:

Помимо различия по типам, двери МДФ различаются и по виду декоративного покрытия. Выделяют пять основных покрытий:

1. ПВХ-плёнка. Материал бывает различных цветов, обеспечивает влагостойкость и огнестойкость дверного полотна.

   ПВХ-покрытие является влагостойким, прочным, безопасным и огнеустойчивым

2. Шпон. Самое дорогое покрытие, так как состоит из натурального дерева. Экологически чистое и придаёт двери уникальный природный древесный рисунок. Дверь, покрытая натуральным шпоном, не будет пропускать тепло и посторонние звуки.

   Двери из шпона обладают широкой гаммой цветов и текстур — подобрать подходящий вариант для оформления любого интерьера не составит труда

3. Экошпон. Изготавливается путём склеивания тонких слоёв древесины. Материал обладает стойкостью к влаге, перепадам температур, звуко- и теплоизоляцией.

   Двери экошпон являются популярным заменителем дорогостоящих шпонированных изделий

4. Ламинат. Одно из самых популярных дверных покрытий среди российских покупателей. Материал обладает повышенной износостойкостью, не подвержен деформации под воздействием влаги. Ламинат трудно повредить даже острыми предметами.

   Декоративная плёнка на поверхности двери выполняет функцию защиты от повреждений и имитирует настоящее дерево

5. Эмаль или краска. Покрытие обладает огромной цветовой палитрой. Наносится на полотно двери несколькими слоями и

90000 What is MDF (Medium Density Fiberboard)? (With pictures) 90001 90002 Medium density fiberboard, or MDF, is a composite wood product similar to particleboard. It’s made out of wood waste fibers glued together with resin, heat, and pressure. MDF is appropriate for many applications, from cabinetry to moulding, because it is smooth, uniform, and will not warp. 90003 90004 A face mask and eye protection should be worn when working with MDF.90002 MDF has many advantages over plank wood, particleboard, or high density fiberboard. It’s very smooth because the wood fibers used in its manufacture are uniform and fine. This makes it have low «tear out,» which means that when sawed, the end has a smooth cut instead of a jagged edge.This also means that a coat of primer and a couple of coats of paint take well, leaving an attractive, finished surface unlike other composite wood products. MDF also has a mild reaction to moisture, meaning it will not warp or swell in high-humidity applications like a bathroom cabinet. 90003 90007 MDF and similar materials are usually covered in veneer.90002 Builders use MDF in many capacities, such as in furniture, shelving, laminate flooring, decorative moulding, and doors. They value MDF for its insular qualities in sound and heat. Also, it can be nailed, glued, screwed, stapled, or attached with dowels, making it as versatile as plank wood.Usually, people working with MDF use a carbide saw fitted with a vacuum to reduce the amount of airborne dust. Since MDF is strengthened with resin containing formaldehyde, those at exposure try to reduce their risk of inhalation, or use special MDF with lower formaldehyde levels. 90003 90002 Want to automatically save time and money month? Take a 2-minute quiz to find out how you can start saving up to $ 257 / month.90003 90002 Reconstituted, engineered wood products like MDF are often covered in a veneer or laminate. These thin layers of vinyl or real wood disguise the MDF, especially along visible edges. Some people prefer using MDF over regular lumber because it has a lower impact on the environment. MDF is solely made from waste products, the leftover scraps that would otherwise be dumped in a landfill.This attraction has helped it gain popularity among homeowners. It’s now available not just to contractors. Many home improvement centers and lumberyards stock it in sheets for the general public. 90003 .90000 What Are The Uses of MDF? — 90001 90002 90003 MDF is an extremely versatile building product, chosen for its strength, affordability, durability, and consistency. An engineered material, made by breaking down hardwood or softwood residuals into fine particles, combining it with wax and a resin binder, and pressing it with high temperature, it’s commonly used in many home and professional projects, including: 90004 90005 90006 Furniture 90007 90006 Cabinets and shelves 90007 90006 Flooring 90007 90006 Decorative projects 90007 90006 Speaker boxes 90007 90006 Wainscoting 90007 90006 Doors and door frames 90007 90006 Tradeshow booths and theater set construction 90007 90022 90003 90004 90025 90026 Advantages of MDF 90027 90028 90005 90006 Generally more cost-effective than plywood or wood 90007 90006 Is consistent throughout so does not have voids or splinters 90007 90006 Has a smooth surface that is perfect for painting 90007 90006 Is easily cut with a router, scroll saw, band saw or jigsaw with no splintering, burning or tear-out 90007 90022 90025 90026 90027 90026 Disadvantages of MDF 90027 90028 90005 90006 Takes in water and other liquids like a sponge and will swell unless well sealed 90007 90006 Is very heavy 90007 90006 Can not be stained because it will soak up the stain, and has no wood grain for aesthetics 90007 90006 Due to its makeup of small particles, does not hold screws well 90007 90006 Contains VOCs (eg.urea-formaldehyde) so needs special attention when cutting and sanding to avoid inhalation of particles 90007 90022 90003 90004 90003 MDF comes in thicknesses from 1/4 in. to 1 in., but most home center retailers only carry 1/2-in. and 3/4-in. Full sheets are oversized by one inch, so a «4 x 8» sheet is actually 49 x 97 inches. 90004 90003 90026 90027 90004 90025 90026 MDF Tips 90027 90028 90003 90026 90027 90004 90025 90026 Do not use a hammer 90027 90028 90003 MDF is extremely hard, so nails bend unless you pre-drill a hole, which is a bit impractical.Use a trim nailer to shoot nails into the surface, and a putty knife to scrape off the tiny bumps that result before filling the nail holes. 90004 90003 90004 90025 90026 Do not let it get wet 90027 90028 90003 When exposed to water, MDF will swell to twice its thickness and will crumble if consistently exposed to water and damp conditions. There are moisture-resistant MDF products, that can be used in areas with humidity such as bathrooms and laundry rooms, but no MDF is waterproof. 90004 90003 90026 90027 90004 90025 90026 Use solvent-based primer 90027 90028 90003 The face of MDF is smooth, but the edges are fuzzy and need to be primed before painting to avoid a sandpaper effect.Most projects only require the edges to be sanded with 100-grit paper and primed with a solvent-based (not water-based) primer. When the primer dries, it can be sanded with 100-grit pads and wiped with a damp cloth before applying paint. 90004 90003 90004 90025 90026 Protect your face 90027 90028 90003 MDF work produces a sandstorm of fine, powdery dust that infiltrates everywhere and everything, so try to cut and rout MDF outdoors. If working indoors, drape sheets of plastic over furniture, doorways and air vents.Wear a tight-fitting dust mask and eye protection. 90004 90003 90004 90025 90026 Keep an extra saw 90027 90028 90003 MDF tends to dull saw blades quicker than most woods or plywood so have an extra saw blade handy. 90004 90003 90004 90025 90026 Sand your edges 90027 90028 90003 Cutting MDF creates sharp, open edges, so you will need to sand all cut edges, which can usually be accomplished with a fairly light-grit sandpaper, such as 150 grit. 90004 90121 Related Posts 90122 90005 90124 90125 MDF vs HDF: How They’re Different and What They’re Good For 90126 MDF and HDF — or medium-density fiberboard and high-density fiberboard — are two of the trendiest materials in woodworking these days.They’re both engineered by combining wood fiber and […] 90127 90007 90129 90130 How to waterproof MDF 90126 Medium density fiberboard, or MDF, is a highly versatile, inexpensive wood product that has many applications, including shelving, cabinetry, furniture and moulding . Made from heat-pressed […] 90127 90007 90134 90135 What Is Okoume Plywood and How Can I Use It? 90126 Okoume, pronounced oh-kuh-mey, plywood is made from the wood of the Okoume tree. It is sometimes called Okoume Mahogany and has a pinkish-brown or pale red hue.Okoume has a uniform […] 90127 90007 90139 90140 Safety First: Choosing the Right Plywood for Your Project 90126 Plywood consists of resin-coated veneer pieces pressed together under heat. That sounds straightforward, but things become a little more involved when it comes to choosing the right type […] 90127 90007 90022 90025 About the Author 90028 90003 90026 Scott LeGros 90027 is key accounts manager and has worked in the plywood and lumber industry for 30+ years.He has been involved in sales and purchasing for softwood, hardwood, and panel products serving a broad span of industrial applications 90004 .90000 What is MDF Wood? 90001 90002 90003 Although many people have heard of MDF, they are not sure what it is or how to use it. MDF is medium-density fiberboard that’s an inexpensive and durable option for many carpentry projects. If you are not familiar with MDF wood, we’ll take you through what it is, the concerns with MDF wood, and the advantages of this versatile material. 90004 90005 90006 Overview of MDF Wood 90007 90008 90003 Medium-density fiberboard is a versatile building material.It’s cost-effective and good for use on shelving, storage cabinets, and decorative projects. It also has a smooth surface, which is perfect for painting. 90004 90003 MDF wood is essentially sawdust and glue that have been fused together with pressure and heat. The color of MDF can range from tan to dark brown. The process of working with MDF is fairly similar to working with other types of wood or plywood. Fiberboard is made from wood fibers, which are small pieces of hardwood or softwood. Low-density fiberboard is called particle board, which is made from even smaller pieces than MDF.There’s also high-density fiberboard known as hardboard that uses more heat and pressure than what’s required to make MDF, making it strong and expensive. 90004 90003 At Forest Plywood, we sell varied thicknesses of MDF wood ranging from ⅛ «to 1 ½» and sheet sizes from 4 ‘x 8’ to 5 ‘x 12’. MDF wood options include: bendy, ultralite, fire retardant, moisture resistant, extira, beadboard, and slatwall. 90004 90005 90006 The Biggest Worries about MDF Wood 90007 90008 90003 90020 Can MDF wood cause health issues? 90021 90004 90003 Most people who ask this are worried about formaldehyde, which is used when constructing MDF.There are studies that link formaldehyde with a risk of cancer, but there are also regulations dictating the amount of formaldehyde that can be used when creating MDF. The off-gassing of the chemical happens when MDF is being made. Painting further decreases the chances of it off-gassing in your home. 90004 90003 90020 Is MDF sold with veneer on it as if it’s solid wood? 90021 90004 90003 MDF furniture with veneer on it to look like solid wood is a popular choice, because it can create the look of expensive or hard-to-find woods.Consumers just need to ask their sales representative what they’re looking at before buying. 90004 90005 90006 Advantages of MDF Wood 90007 90008 90035 90036 MDF is inexpensive. 90037 90036 MDF uses recycled wood, which is environmentally-friendly. 90037 90036 Veneers can be attached to MDF to make it look like real wood. 90037 90036 MDF will not expand and contract in the heat and humidity like solid wood can. 90037 90036 MDF is easy to paint in a variety of colors and easier to shape than solid wood.90037 90036 MDF does not have knots that can make a piece hard to attach. 90037 90036 MDF is resistant to pests, such as termites, due to the chemicals used in its construction. 90037 90050 90005 90006 Disadvantages of MDF Wood 90007 90008 90035 90036 If MDF is chipped or cracked, you can not repair or cover it easily. 90037 90036 MDF can swell if it touches water. 90037 90036 There’s no natural grain on MDF wood. 90037 90036 Small amounts of formaldehyde may be off-gassed during construction, and it’s less child-friendly than solid wood.90037 90036 MDF has glue in it that can make it hard to sink certain types of fasteners into it. 90037 90050 90003 Learn about the uses of MDF wood. 90004 90005 About the Author 90008 90003 90006 Scott LeGros 90007 is key accounts manager and has worked in the plywood and lumber industry for 30+ years. He has been involved in sales and purchasing for softwood, hardwood, and panel products serving a broad span of industrial applications 90004 .90000 MDF Board Guide 90001 90002 MDF (Medium Density Fiberboard) Guide / FAQ 90003 What does MDF stand for? 90004 90005 M 90006 edium 90005 D 90006 ensity 90005 F 90006 iberboard. 90011 What is MDF? 90004 MDF belongs to the 90005 hardboard 90006 family of products which are made from wood fibers glued under heat and pressure. Medium Density Fiberboard typically has densities between 33 and 50 pounds per cubic feet while High Density Fiberboard (HDF) ranges between 50 and 80 pounds per cubic feet.Hardboard was first produced in тисяча дев’ятсот двадцять чотири by W. H. Mason, founder of Masonite Corp. The term Masonite is therefore often used to denote hardboard products, especially HDF. 90011 90004 Physical and dimensional tolerances for MDF are specified in ANSI A208.2-1986 90011 What properties does MDF exhibit? 90004 MDF has many qualities that make it an ideal replacement for plywood or particle board. It is dense, flat, stiff, has no knots and is easily machined.Its fine particles provide dimensional stability without a predominant «Grain» (as is the case with lumber). Unlike most plywoods, MDF contains no voids, and will deliver sharp edges with no tearout. MDF is very well damped acoustically thus making it an ideal material for speaker enclosures. 90011 90004 Below are some metrics for MDF and other types of wood. As you can see, MDF is very dense and heavy, but is not as stiff as other types of wood which is why bracing is suggested.90011 90022 90023 90024 90025 Wood 90026 90025 Modulus of Elasticity 90028 (in million pounds per square inch) 90026 90025 density 90028 (in pounds per cubic feet) 90026 90025 weight of 4×8 sheet 90028 1/2 «thick (in pounds) 90026 90036 90037 90038 90024 90040 MDF 90041 90040 0.53 90041 90040 48 90041 90040 75-85 90041 90036 90024 90040 Oak 90041 90040 1.55 90041 90040 38 90041 90040 60-70 90041 90036 90024 90040 Pine 90041 90040 1.3 90041 90040 29 90041 90040 45-50 90041 90036 90024 90040 Plywood 90041 90040 1.2 90041 90040 33 90041 90040 45-55 90041 90036 90079 90080 90004 The modulus of elasticity (MOE), also called Young’s modulus, is the ratio of stress to strain, where stress is the force per unit area placed on the item and strain is the deformation caused by the stress. The MOE is therefore a measure of stiffness. 90011 What does MDF look like? 90004 Here is an image of a birch veneered MDF board on top and for contrast an image of veneered particle board below.Notice the much larger and obvious particles in the particle board. 90011 Are there any drawbacks to using MDF? 90004 While MDF has been in use for almost 30 years, it is only now becoming available to the general public. Finding MDF may end up being the single toughest part of using it. As its density implies, MDF is very heavy and thus potentially difficult to handle. See the safety issues below. 90011 What are the safety issues to consider when working with MDF? 90004 MDF is typically made with urea-formaldehyde resin totaling 9% by weight.While most people will not be affected by this, people sensitive to formaldehyde emissions should consider low formaldehyde or formaldehyde-free MDF, or consider methods of controlling these emissions through proper finishing. Finishes that work best at controlling formaldehyde emissions are solid add-on surfaces such as high pressure laminates, vinyl covering, and finished wood veneers. Less effective at controlling emissions are simple seal coats, oil and latex paints, danish oil, and wax.Plum Creek makes low-formaldehyde MDF, while Medite II and Medex from Medite Corp. are formaldehyde-free MDF. 90011 90004 Dust is another MDF hazard. The large amount of dust released when working MDF makes proper respiratory and eye protection mandatory. At a minimum use a dust mask. A respirator is preferable. Shop dust collection (or even a ShopVac) would greatly help the removal of dust from not only the air but also the working surfaces, making them easier to see.Goggles should always be worn while using tools. 90011 Is all MDF the same? 90004 No. MDF from different sources will vary in texture, density, color, etc. 90011 How is MDF sold? 90004 MDF is manufactured in sheets up to 8ft x 25ft. Typical consumer level sheets are 2×2, 2×4, or 4×8 and 1/2 inch, 5/8 inch, 3/4 inch and 1 inch in thickness. Thicknesses can also be metric — an important consideration for the use of English system tools (such as router bits).MDF is also available with a variety of veneers and laminates pre-applied, which may affect its actual thickness. 90011 What about MDO, particle board, hardboard, void-free plywood? 90004 90005 M 90006 edium 90005 D 90006 ensity 90005 O 90006 verlay and High Density Overlay are plywood products with a resin impregnated paper coating. They are often used for exterior painted surfaces. These are not fiber based products. 90011 90004 Likewise, particle board is not fiber based; it is a solid wood composite product.Along with flakeboard and other engineered lumbers, composite products are made from wood flakes, chips, splinters, etc., formed into layers and held together by resin glues and heated under pressure. Being layered and consisting of larger chunks, particle board does not have the uniform texture of MDF. 90011 90004 While MDF is a hardboard, the term hardboard is often used to refer to 1/8 or 1/4 inch thick HDF, usually containing a screen pattern on one surface.As previously mentioned, this is commonly referred to as Masonite. 90011 90004 Plywood is made from an odd number of lumber plies, each layer having a grain direction at right angles to the previous layer. This arrangement provides a dimensionally stable product. Void-free plywood uses plies with supposedly no holes, thus the completed plywood has in theory no voids. Baltic birch plywood is often sold as void-free plywood though some users have encountered small voids in these products.Be sure to ask specifically for void-free plywood if this is what you are looking for. 90011 Can I build speakers with {MDF | particle board | plywood | solid wood}? 90004 You can build speakers with whatever you like. However, MDF is often the material of choice. Its stiffness and density yield good acoustical damping properties. Particle board and plywood are cheaper and can still be used if cost is an issue. Plywood (especially if void free) can be used in the main baffle as a sandwich material to better hold fasteners.Plywood is also a good material for making braces inside speaker boxes. Solid wood (Lumber) suffers from movement — the swelling and shrinking of wood due to environmental changes such as humidity — and is therefore not a good material for speaker enclosures. Lumber is also not as acoustically dead as MDF. 90011 What should I use to cut and mill MDF? 90004 MDF can be treated much like a fine grained hardwood. Its high glue content means that steel cutting tools will dull VERY quickly; thus the use of carbide tools is highly recommended.Always keep your tools sharp for efficiency and safety. 90011 90004 The following recommendations are from The National Particleboard Association publication: 90011 90115 90116 For general shop or table saw use with decent cut and good blade life, a 50 tooth, 10 inch combination blade may be used. 90117 90116 For those demanding a better cut, consider a 60 tooth, 10 inch blade with alternate top bevel (ATB) teeth at 15 degrees, 10 degree positive hook, 5 degree side clearance, 10 degree outside diameter clearance, and low approach angle (blade projecting no more than 0.5 inch through top of material). 90117 90116 For an even smoother cut, consider an 80 tooth, 10 inch blade with 15 degree ATB, 10 degree alternate face bevel, 15 degree positive hook, and 7 degrees side clearance. This is costlier and may result in a shorter blade life. 90117 90122 Where can I find MDF? 90004 Availability varies geographically so there is no simple answer to this question. Hobbyists have found MDF from a wide variety of sources including, but not limited to: 90011 90115 90116 large warehouse style supply dealers (Home Depot, Lowes, etc) 90117 90116 small local lumber yards 90117 90116 cabinet shops who buy in large quantities and are willing to part with some 90117 90116 surplus building supply dealers 90117 90122 90004 As MDF becomes more popular you will see it more and more in your local hardware stores.Sometimes, they will only have smaller 2×4 pieces or 1×4 pieces designed for use as shelving, so be sure to look around or ask. 90011 90004 Beware of clueless store clerks trying to pass plywood, particle board or MDO as MDF! Note that many lumber yards can special order MDF but may not realize this, so it never hurts to ask. Ask them to check their price book for availability. 90011 What kind of joints can I use? 90004 Because MDF can be milled to just about any profile, there are many possible joints.However, not all make sense in the context of speaker building. 90011 90115 90116 butt — this simplest of joints may not be ideal for furniture but works very well for building speakers, especially when combined with biscuits (For alignment) and screws (for holding strength while the glue dries). 90117 90116 miter — works well when using pre-finished MDF (veneered or laminated) thus leaving no exposed unfinished surfaces.90117 90116 lock-miter, dovetail and other routered joints — works just like lumber. These joints have limited use in most speaker enclosures. 90117 90116 rabbets, dadoes, grooves and other saw cut joints — same as with hardwood. Note that these can also be cut with a router. These joints may be useful, depending on the design of the speaker. 90117 90116 spline, biscuit, dowel — as with lumber, the glue joint is stronger than the MDF.Dowel holes should be 0.002 to 0.003 inch larger than the average dowel diameter, and 1/32 to 1/16 inch deeper than the actual depth used. Plain or spiral grooved dowels are preferred over fluted or multigrooved dowels. Biscuits are very handy for alignment of parts in addition to the additional gluing surface provided. 90117 90122 90004 MDF can also be edge glued to make larger surfaces, although this is not likely to happen except with exceptionally large speakers.Panels can be scarfed, doweled, tongue & grooved and finger jointed. 90011 How may various fasteners be used with MDF? 90004 Some typical fasteners and their uses follow: 90011 90115 90116 staples — Do not staple within 3/4 inch of any corner. Coated staples hold better than smooth staples. Use a finer wire staple if splitting is a problem. Drive at right angle to the surface to avoid bending. 90117 90116 nails — The same rules apply to nails as they apply to staples.Use ring-shank nails to avoid fiber raising around the nail head; do not use smooth nails. 90117 90116 screws — Drill pilot holes between 85% and 90% of the root diameter of the screw used and at least as deep as the screw. Untapered sheet metal screws with constant size shank are good, as are some untapered wood screws. Pilot hole sizes and minimum edge distances for common screw sizes are: 90117 90115 90116 # 6 screw — 3/32 inch pilot — 1/2 inch edge distance 90117 90116 # 8 screw — 7/64 inch pilot — 5/8 inch edge distance 90117 90116 # 10 screw — 1/8 inch pilot — 1 inch edge distance 90117 90122 90122 90004 Do not rely solely on the above fasteners for building speaker enclosures.This is especially true for butt joints. Combine glue with screws for a simple and strong joint. 90011 What kinds of glues can I use with MDF? 90004 Good glues to use are gap-filling glues such as polyvinyl acetate (PVA) typically known as yellow glue, modified PVA glues like Titebond II or white glues. Epoxy, urea and hot melt glues may also be used. 90011 How can I finish my MDF speaker? 90004 For that finished look, there are many options requiring different levels of woodworking skills.90011 90115 90116 The box may be painted. Be sure to seal and prime the surface before painting to ensure even absorption on all surfaces. A high gloss piano finish can be made with combinations of spray enamel, spray lacquer or other topcoats. A little experimentation at this juncture can be very rewarding. 90117 90116 The box may be laminated. Options include melamine, Formica, or even contact paper. Be sure the surface is clear of dust before applying any laminate.90117 90116 The box may be veneered. Carried out properly, veneering can yield a very professional looking speaker. Refer to the references below for veneering info. A veneered surface can be finished with lacquer, varnish, oil or wax depending on individual taste. Stains and dyes may be used to modify the color as desired. 90117 90122 90004 Note that raw MDF is very porous. Use a generous amount of glue to ensure a proper bond.90011 Are there any other tips for using MDF in speaker enclosures? 90004 Yes, some other tips include: 90011 90115 90116 Apply the finish to the enclosure after assembly. Then cut the speaker holes. This gives the best appearance for the least work. 90117 90116 Use shelf braces to stiffen the box and to further support edge joints. Also use 3/4 x 3/4 inch lumber along the inside of edge joints for extra strength and for stiffening.90117 90116 Use a table saw for dadoes and grooves when possible. This usually gives better, straighter results. 90117 90116 On large panels with no bracing or shelves attached, reinforce the panel with one or more 3/4 x 3/4 inch ribs. 90117 90116 If using particle board, fill exposed edges with spackle or wood filler. Then sand all surfaces thoroughly to get a smooth surface. Prime before painting. 90117 90116 Two coats of yellow glue applied 10 minutes apart may be used to seal MDF edges.90117 90116 Wood or autobody sealer may also be used to seal MDF edges. 90117 90116 To avoid stripping threads when mounting drivers to MDF baffles use threaded inserts such as T-nuts. 90117 90116 Excess glue may be removed before it dries with a damp rag. For pre-veneered MDF, care should be taken to avoid smearing glue into the wood grain. An alternative method is to scrape off the glue in its semi-hard state. 90117 90122 .