Print the unloading of plate making, hole and sharp processing can all adopt the blanking method of the mould, can adopt blanking way in processing PCB that simple PCB or requirement is not very high. Suitable low level and requirement in enormous quantities are not very high PCB and production that the appearance requirement is not very high PCB, its cost is relatively low.
Wash the hole:
Production lot is big, paper base plate and oxygen glass cloth base plate of ring of the two-sided non- metallization hole the kind of the hole and forms in large quantity and with complicated shape, usually adopt one or several pairs of moulds to wash the hole. Sharp processing: Print single panel and appearance of one pair of panels of plate making with big production lot, usually adopt the mould to wash. According to print size of plate making, blank mould and the intersection of whereabouts and the intersection of material and model can divide into.
Compound and process: Print hole and hole of plate making, require the precision to be high between hole and appearance, make cycle in order to shorten at the same time, boost productivity, adopt the compound mould to process hole and appearance of the single panel at the same time.
Process and print plate making with the mould, the more important thing is the design of the mould, process, need knowledge of professional technique, in addition, installation and debugging of the mould are very important, moulds in most PCB factories are all processed by the other factory at present. Install the attentive matters of the mould:
1.The blanking strength calculated according to mold design, the size of the mould, close and highly,etc. choose the puncher including the type, tonnage .
2.Start puncher, check in an all-round way including clutch, brake, slip piece every part normal, whether the operating organization is reliable, have not washed the phenomenon in succession.
3.The cushion iron under the trimming die, it is generally 2 yuan, must rub out at the same time on the grinding machine, guarantee it is parallel, vertical to install the mould. What the cushion iron is put is too intercalary to put promptly the hindrance will blank close to the centre of the mould as much as possible again at the same time.
4.Should prepare several sets of pressing plates and T -shaped head bridge screws, in order to correspond to mould and use. The front of pressing plate can’t touch the mould extended arm. Each exposed to the surfaces and should pad the emery cloth, the screw must be tightened.
5.Mould drop at mould want screw, nut to pay close attention to lower model touch upper mould when the installation ‘, close .
6.Use manually as much as possible while adjusting the mould, but don’t be flexible. 7.In order to improve the blanking performance of the substrate, the paper base plate wants for heat. Its temperature is good with 70- 90 ℃.
The blanking of mould prints hole and appearance of plate making, there are the following several kinds of the defect of its quality:
Protruding around the hole or the copper foil is got up to stick up or divided layer; There is crackle among hole and hole; The position of hole leans towards or hole is not vertical; The burr is big; The section is coarse; Washing the seal plate making that is made becomes shape warping of a pot of bottom; Jump on the waste material; The waste material stops up. It checks and analyzes the step as follows: Check whether the blanking strength, rigidity of the puncher are enough; Whether mold design is rational, rigidity is enough; Protruding, concave mould one and leading the column, leading the machining accuracy of set to reach, whether it is concentric, vertical to install. Cooperate with the interval to be even. The protruding, concave interval passes small or passes the big city and produces the quality defect, it is mold design, the most important problem while processing, debugging, using. The protruding, concave mould blade does not allow the round angle, pour the angle. Protruding mould allow conical degree is especially no matter straight to bore and pour awl, allow wash hole. Pay attention to the protruding, concave mould blade to abrade in production at any time. Is it rational to arrange the material mouth, resistance is small. Push the material board, is it rational to hit the material pole, strength is enough. Washed panel thickness and cohesion of the base plate, glue content, and the cohesion of the copper foil, it is factors that the blanking quality defect should be considered to give heat humidity and time wait for while analyzing.