CN201287358Y

CN201287358Y - Apparatus for cutting semi-curing slice

Info

Publication number: CN201287358Y
Application number: CNU2008202023864U
Authority: CN
Inventors: 段军; 梅领亮; 李祥友; 徐地华; 曾晓雁; 王泽敏; 陈伯平
Original assignee: Huazhong University of Science and Technology; Guangdong Zhengye Technology Co Ltd
Current assignee: Huazhong University of Science and Technology; Guangdong Zhengye Technology Co Ltd
Priority date: 2008-10-24
Filing date: 2008-10-24
Publication date: 2009-08-12
Anticipated expiration: 2018-10-24

Abstract

The utility model discloses a cutting device of prepreg, comprising a PP strip division cutting machine of which the side part of a straight knife and a flywheel knife are provided with a heat source. The cutting device can strip and cut pregreg, without white layers at the edge of cuts, broken fine resins and fiber dust. The cutting device can improve cutting quality and precision and eliminates following program to improve production efficiency, and eliminates dust in cutting to improve the working condition of operators and resolve the hygienic problem in cutting workshop.

Description

A kind of cutting means of prepreg

Technical field

The utility model relates to the printed circuit board manufacturing apparatus, is specifically related to a kind of cutting means of prepreg.

Background technology

Nearly all electronic equipment all be unable to do without printed circuit board (PCB).For a short time, arrive computer, communication electronic equipment, military armament systems greatly to electronic watch, calculator, mobile phone, general-purpose computer, as long as electronic devices and components such as integrated circuit are arranged, electric interconnection all will be used printed circuit board (PCB) between them.It provides the mechanical support of the fixing assembling of various electronic devices and components such as integrated circuit, realizes being electrically connected or electric insulation between the various electronic devices and components such as integrated circuit, provides electrical equipment desired electrical characteristic, as characteristic impedance etc.Simultaneously, can be automatic soldering the welding resistance figure is provided, for components and parts plug-in mounting, inspection, maintenance provide identification character and figure or the like.

Common printed circuit board (PCB) and copper coated foil plate (CCL) are made by prepreg.And prepreg is by treated glass fibre fabricbase (or claiming glass cloth), resin adhesive liquid on the dipping, make resin enter the B stage through heat treatment (preliminary drying) again, by rolling the sheeting (claiming plexiglas fiber cloth or glass fiber resin plate again) that thinning (thickness is 0.02-0.5mm) is made.PCB/CCL manufacturing process is that cut-parts become needed size through PP (prepreg) slitting cutting machine itemize with prepreg, and it cuts technical process as shown in Figure 1.Slitting cutting machine 10 comprises first, second

compacting wheels

5,9, upper and lower flywheel knife (claiming dise knife again) 2,3, and upper and lower straight knife 6,7.The number of upper and

lower flywheel knife

2,3 can be a plurality of.Prepreg 1 is sent into upper and

lower flywheel knife

2,3 slittings and is become required width dimensions 4 by the compacting wheels 5 of PP slitting cutting machine 10, repressed again wheels 9, and the upper and lower

straight knife

6,7 of sending into PP slitting cutting machine 10 carries out the straight line slices across and becomes Len req size 8.Because prepreg has in temperature and is raised to certain limit, but resin refuse and have the characteristics of viscosity therefore, the substrate after cutting can be superimposed, be warmed to certain limit, by rolling the resin substrate that solidify to form required thickness.The top layer one or both sides of this substrate be stained with cover the copper book again lamination solidify to form and cover copper book sheet material, be called rigid plate.At last, by technologies such as exposure, corrosion, make the rigidity printed wiring board again.

The material of some prepreg is made up of paper substrate or mixture-base and resin and is formed, and adopting uses the same method cuts.

At present the greatest problem that faced of PP slitting cutting machine cutting prepreg technical process is the notching edge layering of can turning white, and produces the tiny resin and the glass fiber dust of many fragmentations.Particularly under mechanical force, the glass fabricbase fiber at notching edge place is easily pulled notching edge, forms the suede hair, brings a series of problems to product quality:

(1) cuts prepreg edge after the cutting and scatter and cause the notching edge degradation, directly influence the postorder crudy, subsequent product quality and processing are made troubles, cause production efficiency to reduce;

(2) if the area that scatters at notching edge is bigger, the suede hair increases, and can make the substrate size deterioration in accuracy of cutting and scraps, can't recycling, and cause the thin substrate process cost of pure mechanical cutting to increase;

(3) the broken thin resin and the glass fiber dust of generation can directly pollute the working environment health, influence health of operators and the cleaner production of cutting the workshop.

The utility model content

In order to address the above problem, the utility model provides a kind of cutting means of prepreg, after adopting this device that prepreg is carried out slitting and section, can be in notching edge occur turning white layering and produce broken tiny resin and glass fiber dust phenomenon.

The cutting means of the prepreg that the utility model provides comprises PP slitting cutting machine, is provided with thermal source at the straight knife of PP slitting cutting machine, the sidepiece of flywheel knife.

As improvement of the technical scheme, enter a side at the substrate of straight knife, flywheel knife and be provided with thermal source.Described thermal source is laser beam, thermal current, semiconductor heat booster or hot roller.

After utilizing the resin in the prepreg to be heated, can soften again the utility model or the softening or fusion temperature of fusing and resin is lower than the characteristics of fiber cloth ignition temperature (ignition temperature of fiber fabricbase is about 500 ° to 600 ℃, and the resin fusion temperature is about 200 ℃), adopt thermal source waits to cut place or notching edge to prepreg resin heat temperature raising to softening or more than the fusion temperature, but be lower than fiber fabricbase ignition temperature, make the softening or fusing of resin and the fiber fabricbase is unaffected, avoided the fiber fabricbase burned and cause that cutting a mouthful edge burns carbonization phenomenon.Having the prepreg that burns the carbonization notching edge is to ban use of in printed wiring board PCB/CCL industry, causes the insulating properties of PCB and CCL to reduce greatly and the electrical characteristic deterioration because burn the semi-solid preparation sector-meeting of carbonization.When the resin of the notching edge after cutting is in softening or molten state, can not produce broken tiny resin or the tiny resin and the fibre dust of fragmentation is together bonding again, and after removing, thermal source at room temperature solidifies again, reach prepreg notching edge edge sealing is solidified, eliminate prepreg and cut the turn white layering and produce the broken tiny resin and the purpose of fibre dust phenomenon of mouthful edge.

Because prepreg cutting means of the present utility model can obtain not have the layering of turning white in the cutting prepreg process, produce the broken tiny resin and the notching edge quality of fibre dust, not only improved and cut quality and precision but also eliminated the postorder handling procedure, improved production efficiency.Eliminated cutting the dust phenomenon that produces in the process simultaneously, improved operating personnel's working environment, solved the sanitation and hygiene problem of cutting the workshop.

Description of drawings

Fig. 1 is the structural representation of existing P P slitting cutting machine;

Fig. 2 is the structural representation of first kind of specific embodiment of the utility model device;

Fig. 3 is the structural representation of second kind of specific embodiment of the utility model device.

The specific embodiment

The utility model will be further described below in conjunction with drawings and Examples.

As shown in Figure 2, the utility model device comprises PP slitting cutting machine and first, second thermal source 15,40.PP slitting cutting machine comprises first, second

compacting wheels

5,9, upper and

lower flywheel knife

2,3, and upper and lower

straight knife

6,7, the first thermals source 15 are installed in the side behind flywheel knife 2 cutting prepregs, and second thermal source 40 is installed in any side of straight knife 6.

With prepreg 1 repressed wheels 5, be input to flywheel knife 2, down flywheel knife 3 cuts itemize and becomes 4, adopt thermal source 15, make heat penetrate directive effect in otch 21 places that cut the prepreg of itemize by last flywheel knife 2, following flywheel knife 3, and the thermal power of control thermal source, make temperature after the resin of cutting part is heated be higher than softening or fusion temperature but be lower than 500 ℃.Like this, can make the tiny resin of fragmentation at notching edge place and glass fiber dust is softening rapidly or fusing bonds together, and can not make the glass fibre burning.After being left heat by the otch 21 of the prepreg of itemize, solidify to form heat-sealing sideline judge notching edge 22 at ambient temperature rapidly, reached and eliminated the turn white purpose of layering of notching edge.

With the prepreg 4 repressed wheels 9 of itemize, send between the upper and lower

straight knife

6,7 of PP slitting cutting machine 10, adopt thermal source 40 outputs to be higher than softening or molten resin but be lower than that 500 ℃ temperature heat acts on prepreg wait to cut place 50, the resin at this place is heated is warmed to softening or molten state, thermal source 40 stops heating then, the upper and lower

straight knife

6,7 of while PP slitting cutting machine 10 carries out the straight line slices across and becomes the Len req size, and it is cropped that resin is under softening or the molten state.Notching edge resin after cutting solidifies rapidly at ambient temperature, form the edge sealing otch, has eliminated the turn white purpose of layering of notching edge thereby reached.

The utility model device comprises the PP slitting cutting machine and first to the 3rd

thermal source

15,40,25 as shown in Figure 3.The first, the 3rd

thermal source

15,25 is installed in behind the cutting prepreg of flywheel knife 2 respectively and the front side, and second thermal source 40 is installed in any side of straight knife 6.

With prepreg 1 repressed wheels 5, adopt thermal source 25 outputs to be higher than softening or fusing epoxy resin but be lower than that 500 ℃ temperature heat acts on semi-solid preparation plexiglas fiber cloth substrate wait to cut place 31, the resin at this place is heated is warmed to softening or molten state, the last flywheel knife 2 and the following flywheel knife 3 that are sent to PP slitting cutting machine 10 again cut itemize, make the resin be in softening or molten state under cropped, reached and eliminated the turn white purpose of layering of notching edge.

If further strengthen having eliminated the notching edge lamination of turning white, notching edge 32 behind the slitting cutting is higher than softening or fusing semi-solid preparation agent resin but be lower than 500 ℃ temperature heat 20 through thermal source 15 output again, seal the limit and handle, further softening or molten resin strengthens sealing the limit effect.When notching edge by behind the thermal source 15, resin solidifies rapidly at ambient temperature, form edge sealing otch 33, has eliminated the turn white purpose of layering of notching edge thereby reached.

straight knife

6,7 of PP slitting cutting machine 10, upper and lower

straight knife

6,7 carries out the straight line slices across and becomes the Len req size, adopt thermal source 40 output to be higher than softening or fusing semi-solid preparation agent resin again but be lower than the incision that 500 ℃ temperature heat acts on semi-solid preparation plexiglas fiber cloth substrate, make temperature after the resin of cutting part is heated be higher than softening temperature but be lower than 500 ℃.Like this, can make the tiny resin of fragmentation at notching edge place and glass fiber dust is softening rapidly or fusing bonds together, and can not make the glass fibre burning.After the otch of prepreg after the section leaves thermal source 40, solidify to form heat-sealing sideline judge notching edge at ambient temperature rapidly, reached and eliminated the turn white purpose of layering of notching edge.

Thermal source can be laser beam or thermal current or any mode such as semiconductor heat booster or hot roller, also can be used in combination.The temperature of heating determines according to the concrete composition of prepreg material, and the glass fibre fabricbase can not burn as long as make the softening or fusing of resin in the prepreg.Usually, semi-solid preparation agent resin fusion temperature about 200 ℃, and the glass fibre ignition temperature up to 500 ° to about 600 ℃, therefore, heating-up temperature effect in the time of 100～200 ℃ is better, both can reach good edge sealing effect, also can save the energy, reduce production costs.

The utility model device can will have multiple variation and combination on the basis of Fig. 2 and Fig. 3.The utility model is applicable to the prepreg that paper substrate or mixture-base and resin composition form too.

The utility model not only is confined to the above-mentioned specific embodiment; the disclosed content of the basic utility model of persons skilled in the art; can adopt other multiple specific embodiment to implement the utility model; therefore; every project organization of the present utility model and thinking of adopting; do some simple designs that change or change, all fall into protection domain of the present utility model.

Claims

1. the cutting means of a prepreg comprises PP slitting cutting machine, it is characterized in that: be provided with thermal source at the straight knife of PP slitting cutting machine, the sidepiece of flywheel knife.

2. cutting means according to claim 1 is characterized in that: enter a side at the substrate of straight knife, flywheel knife and be provided with thermal source.

3. cutting means according to claim 1 and 2 is characterized in that: described thermal source is laser beam, thermal current, semiconductor heat booster or hot roller.