一、 Definition and purpose of hand board

Hand board is the industry term, hand board is not open mold premise, according to the product appearance drawings or structural drawings first made one or several, used to check the appearance or structural rationality of the functional prototype.

The purpose of making a hand board, the first step is to find out the defects, deficiencies, and drawbacks of the designed product in the most direct and effective way, so that the defects can be targeted for improvement until the deficiencies cannot be identified from individual hand board samples. Then, usually also need to carry out a small amount of trial production and then find the batch in the insufficient to improve.

The design of the finished product generally can not do very perfect, or even unusable, direct production once there are defects will all be scrapped, a great waste of manpower and material resources and time; and hand board is generally a small number of samples, production cycle is short, the loss of manpower and material resources less, quickly identify the shortcomings of product design and improve, to provide sufficient basis for the final product mass production.

 二, the hand board classification

1, according to the means of production.

Hand board in accordance with the means of production, can be divided into manual hand board and CNC hand board.

(1) manual hand board: the main workload is done by hand.

(2) CNC hand board: its main workload is completed with CNC machine tools, and according to the different equipment used, and can be divided into 3D printing hand board and machining center (CNC) hand board.

3D printing hand board: mainly with laser rapid prototyping technology to produce the hand board.

CNC boards: mainly produced by machining centers.

3D printed boards and CNC boards have their own advantages and disadvantages.

The advantages of 3D printed boards are mainly in its rapidity, but it is mainly through additive technology, so 3D printed boards are generally relatively accurate, and the wall thickness of the product has certain requirements, such as the wall thickness is too thin can not be produced.

The advantage of CNC hand board is that it can reflect the information expressed in the drawing very accurately, and the surface quality of CNC hand board is high, especially after the completion of the surface coating and silk screen printing, even more brilliant than the products produced after the mold is opened. Therefore, CNC hand board manufacturing is currently the mainstream of the hand board manufacturing industry.

2, according to the materials used.

Hand board in accordance with the materials used in the production, can be divided into plastic hand board, silicone hand board, metal hand board, putty hand board: (1) plastic hand board: the material used in the production of its

(1) plastic hand board: its raw materials for plastic, mainly some plastic products hand board, such as televisions, monitors, telephones, etc..

(2) silicone boards: its raw materials are silicone, mainly to show the shape of the product design boards, such as cars, cell phones, toys, handicrafts, daily necessities and so on.

(3) metal boards: the raw materials for aluminum and magnesium alloy and other metal materials, mainly some high-grade products, such as laptop computers, advanced single-players, MP3 players, CD players, etc.

(4) the clay hand board: its raw materials for the clay, commonly known as clay carving hand board, mainly for product design and development, in the early stage of product development clay carving master according to their own imagination or pictures to make models with clay, and then in accordance with the clay model to determine the appearance, but the current clay hand board is freeform instead of a lot.

3、According to the hand board level

According to the effect to be achieved, it can be divided into appearance boards, structure boards, functional boards.

(1) the appearance of the hand board: the main test product design, requiring a beautiful appearance, accurate color, the internal processing requirements are not high.

(2) Structure hand board: the main test product structure rationality, for size requirements are high, relatively low requirements for the appearance, foreign countries are particularly strict requirements for such.

(3) functional boards: required to achieve the same exact appearance, structure and function as the real product, can be understood as the unlisted finished product, is the highest requirements, the most difficult class of boards.

三, what are the hand board materials?

The common hand board model materials are divided into two categories, respectively, metal and plastic, the following magic monkey to explain the performance characteristics of these hand board model materials and their application range of these hand board model materials, hope to bring help to you.

1, metal hand board materials

Aluminum alloy: aluminum alloy is a more commonly used metal materials, its strength and hardness are very good, 6063, 6061, 7075 series of aluminum alloy used more, generally do sandblasting oxidation surface treatment.

Stainless steel: stainless steel hand plate model commonly used materials are SUS304, 316, stainless steel high strength, good corrosion resistance; stainless steel has magnetic absorption, used for special parts.

2、Plastic type hand board materials

ABS: good impact resistance, strength toughness and temperature resistance are okay, disassembly processing is more convenient, easy to stick glue, many types of hand board model need to use ABS.

PC: good strength toughness impact resistance, high temperature resistance, good insulation, the material itself is translucent, it can also be dyed and sprayed with oil, do transparent or translucent hand board model are the first choice.

Acrylic: also called organic glass, transparency is PC is better, the disadvantage is more brittle, easy to crack.

TPE/TPU: used to do more soft rubber hand board model, silicone buttons remote control and other fields with more, can do hardness 30-90 degrees.

PMMA: is an amorphous polymer, commonly known as organic glass, transparency is better, the transparency effect is better than PC material, and excellent heat resistance.

POM race steel: high hardness, smooth surface, high density, very wear-resistant, very suitable for making some gear hand model.

PP: PP material is relatively light, elastic performance is very good, temperature resistance of about 100 degrees, low-pressure infusion with more, mainly used for large auto parts before and after the bumper center console or the shell of the medical industry.

Nylon: scientific name: PA, nylon high strength, good wear resistance, the disadvantage is not easy to stick glue, large panels are generally not choose this material, because it can not be disassembled.

四, the common hand board processing technology

Manual hand board, cnc hand board, 3D printing hand board, etc.