WO2018177226A1

WO2018177226A1 - Production process for controlling adhesive flow-out of copper-clad laminates, and supporting devices

Info

Publication number: WO2018177226A1
Application number: PCT/CN2018/080383
Authority: WO
Inventors: 王文潮
Original assignee: 王文潮
Priority date: 2017-03-29
Filing date: 2018-03-24
Publication date: 2018-10-04
Also published as: CN106984478B; CN106984478A

Abstract

A production process for controlling adhesive flow-out of copper-clad laminates, and supporting devices. In the process, during conventional prepreg production, a meridional edge covering process and a latitudinal edge covering process are additionally used. A fiber spraying edge covering method is used for each edge covering process. There are two fiber spraying edge covering methods. One of the methods is a hot melting fiber spraying edge covering method, comprising: heating an edge of a prepreg to melt the resin; spraying a fiber mixture to the melt area so that the fiber mixture adheres to the melt area; and performing flattening and deburring to make the thickness uniform and the edge smooth. The other is a fiber spraying hot-pressing edge covering method, comprising: directly spraying a fiber mixture to an edge of a prepreg; and pressing the fiber mixture into resin at the edge of the prepreg by means of an electrically heated roller to complete edge covering. Also provided are two supporting devices corresponding to the two methods. The methods and supporting devices are applicable to continuous and efficient edge covering of prepregs on a prepreg production line, thereby avoiding adhesive flow-out of copper-clad laminates during pressing.

Description

Production process and supporting equipment for controlling copper clad flow adhesive

Technical field

The invention belongs to the technical field of preparation of copper clad laminates, relates to a novel production process and supporting equipment for preparing copper clad laminates, in particular to a production process and supporting equipment for controlling laminating flow of copper clad laminates, and the production process and supporting equipment are passed through The bonding sheet used in the manufacturing process of the copper clad laminate, the insulating board, the multilayer circuit board, and the like is subjected to a edging process by a hot-melt jet edging method using a radial trimming edge wrapping machine and a weft-slicing edge wrapping machine. It can make the CCL, the insulation board and the multi-layer circuit board not flow when pressed.

Background technique

The reinforcing material of the glue immersed in the mixed resin is baked to partially improve the degree of curing of the resin, and becomes a solid bonding sheet, which is laminated and laminated with one or more bonding sheets, and both sides are covered with copper. The foil or release film is pressed and laminated under vacuum to form a copper clad laminate, which is referred to as a copper clad laminate (double-sided copper-free insulating board), which is mainly used for making a printed circuit board (PCB). The multi-layer printed circuit board is integrally combined with the bonding sheet, which is a multilayer circuit board.

During the heating and pressing process of the bonding sheet, the resin in the bonding sheet re-melts as the temperature increases due to the low degree of cross-linking of the resin. In a vacuum laminator, due to the combined action of vacuum and pressure, the molten glue drains the air and occupies the interior space, while the molten glue also flows out of the outer edge of the bonding sheet. As the compression process proceeds, the temperature continues to rise and the resin continues to crosslink and eventually solidifies. The phenomenon that the mixed resin glue flows out of the outer edge of the bonding sheet is called a flow glue. The resin cavity is caused by the flow of glue on the edge of the copper clad plate, which is called lack of glue.

In the prior work of the Applicant, "A Method for Controlling the Flow of Copper Clad Sheets" (Patent Application No. 201710024846.2), a method of wrapping a bonding sheet with a paper tape to control the flow of the copper clad laminate is disclosed. The method adopts manual edging and completes the laboratory technical verification, which proves that the copper clad flow can be effectively controlled.

At present, most of the electronic glass fiber cloths used for the production of copper clad laminates are open fiber cloths (the length of the weft yarn is greater than the distance between the two sides of the yarns of about 5 mm), and the bonding sheets produced by using the fiber cloth need to be radially trimmed to remove the stick. The weft of the weft is burr. At present, the commonly used trimming equipment is a bonding blade radial cutting knife and a crimping machine, and when the burrs are cut, more than three diameter yarns are cut off, resulting in waste.

Summary of the invention

The object of the invention is to provide a continuous and fast edging method and supporting equipment for the bonding sheet in the industrial production on the basis of the laboratory verification technology of the method for controlling the flow of the copper clad laminate to solve the copper clad laminate. The problem of the flow of glue when the insulating board and the multilayer circuit board are pressed.

In order to achieve the above object, the production process for controlling the copper clad flow adhesive of the present invention is to perform radial edging after the bonding sheet baking and the radial trimming process are completed in the production process of the conventional bonding sheet, and The weft edging is performed after the bonding sheet is subjected to the weft sizing, and the radial edging and the weft edging are both subjected to the blasting method to achieve continuous and rapid edging. The radial edging is a radial edging performed on the bonding sheet production line after the completion of the baking and the radial trimming process, that is, the fiber mixture is used for the edge of the bonding sheet after the burr is removed. Carry out the edging. The weft wrapping is performed after the bonding sheet is subjected to the weft slicing, that is, the front and rear sides of the bonding sheet are weft-wrapped.

There are two methods for the fiber hem wrapping:

The first type is a hot melt blown fiber wrapping method, which includes the following steps:

Step 1. Heating the edge of the bonding sheet to melt the resin;

Step 2, spraying the fiber mixture to the edge of the resin melted bonding sheet to adhere thereto;

Step 3. Leveling and trimming the edges of the bonding sheets to which the fiber mixture is adhered to make the thickness uniform and the edges smooth.

The second method is the fiber-jet hot-pressing method, which includes the following steps:

Step 1, directly spraying the fiber mixture to the edge of the bonding sheet;

Step 2: using an electric heating roller to press the fiber mixture into the resin at the edge of the bonding sheet;

Step 3. Repeat

steps

2 and 3 to fully cover the edges of the bonding sheet with the fiber mixture.

The fiber mixture can be prepared by using a plant fiber or a resin curing accelerator.

The invention also provides an accessory device for controlling a production process of a copper clad laminate, comprising a radial trimming edge wrapping machine and a weft wrapping machine, the radial trimming edge wrapping machine comprising a trimming unit and a beading unit The weft wrapping machine comprises a beading unit; the trimming unit is used for radially trimming the bonding sheet, that is, cutting the weft burr of the bonding sheet, and the edge unit is used for edge-cutting or slicing the edge of the bonding sheet Carry out the edging.

The trimming unit comprises a radial trimming knife and a power driven upper and lower roller set, the upper and lower roller sets are used for pressing the edge of the bonding sheet up and down, the radial cutting knife is closely attached to the outer plane of the roller set, and the cutting edge and the upper and lower rollers The axial centers of the outer circular faces of the group coincide, facing the opposite direction of advancement of the bonding sheets.

The weft wrapping machine is used to edging the two sides of the bonding sheet after being sliced by the weft cutting device.

The edging unit can adopt two schemes, which respectively correspond to the above two methods of jet edging.

1) For the first type of fiber hem coating (hot melt blasting method), the edging unit may include a baking subunit, a spun subunit, and a singulation subunit, and the baking subunit is used for trimming or The sliced adhesive sheet edge resin is melted, and the spun subunit is used to spray the fiber mixture to the edge of the above-mentioned resin melted bonding sheet, and the flattening subunit is used to trim the edge of the bonding sheet to which the fiber mixture is adhered. Peace and trimming;

The baking subunit includes a baking chamber casing, an infrared lamp tube and a reflection cover, and the baking chamber casing is used to form a closed baking work space, and a gap is provided on one side of the middle portion for the edge of the bonding sheet to pass. The size of the slit can be set to automatically adapt to the thickness of the bonding sheet, the inner width of the slit is narrowed to the width of the bonding sheet, and the gap is bounded by the gap. The baking chamber is divided into two chambers, and the infrared tube is divided into upper and lower parts. Each of the chambers is used to simultaneously heat the upper and lower sides of the bonding sheet, and the power and the switch can be set to be automatically controlled to adapt to the production speed of the bonding sheet. The reflector is disposed in each of the upper and lower chambers for the infrared lamp. The light of the tube is focused to the edge of the bonding sheet;

The jetting subunit comprises a fiber blowing chamber casing, a material tank, a spray gun assembly and a material recycling component, and a slit for the edge of the bonding sheet is left on the middle side of the casing of the fiber spraying chamber, and the size of the slit can be set to automatically adapt The thickness of the bonding sheet, the internal width of the slit is narrowed to the width of the bonding sheet, and the gap is bounded by the gap. The spray chamber is divided into two chambers. The spray gun nozzle of the spray gun assembly is divided into upper and lower chambers for use. The two sides simultaneously spray the fiber mixture to the edge of the resin melted bonding sheet, and the air outlet of the material recycling component is divided into upper and lower chambers for recycling the fiber mixture not adhered to the edge of the bonding sheet to the material tank for recycling. ;

The leveling unit comprises an upper and lower electric heating roller group and a trimming knife, and the gap between the upper and lower electric heating roller groups and the thickness of the bonding sheet are automatically kept consistent, and the trimming knife is closely attached to the outer plane of the upper and lower roller groups, and the cutting edge is upper and lower. The axial connection of the outer circular surface of the roller set coincides, facing the opposite direction of advancement of the bonding sheet. The upper and lower electric roller sets are used to roll the edges of the bonding sheets to which the fiber mixture is adhered, while the trimming knife trims the resin and fiber mixture mixture extruded at the edges to smooth the edges.

2) For the second type of fiber-jet edging method (spray fiber hot-pressing method), the edging unit may include a material tank, a edging chamber casing, a spray gun assembly, an electric heating roller group, and a material recycling component. The edging chamber casing is configured to form a closed edging working space, and a gap slightly larger than the thickness of the bonding sheet is left in one side of the side for the edge of the bonding sheet to pass, and the size of the slit can be set to automatically adapt to the bonding Sheet thickness. The spray gun assembly has a plurality of spray gun nozzles for simultaneously spraying a plurality of points on the upper and lower sides of the edge of the bonding sheet, and the spray gun nozzle is aligned with the front side of the electric heating roller and the edge of the bonding sheet; the electric heating roller group, It is composed of a plurality of pairs of upper and lower electric heating roller groups, and the gap between the upper and lower electric heating roller groups can be set to automatically adapt to the thickness of the bonding sheet, and the temperature of the electric heating roller group can be set to automatically adapt to the edging speed for repeatedly pressing the fiber mixture into In the resin at the edge of the bonding sheet, the thickness of the edge of the bonding sheet after bonding is substantially the same as the thickness of the bonding sheet; the nozzle and the electric heating roller are alternately distributed along the moving direction of the bonding sheet; The exhaust port is disposed under the outer casing of the edging chamber. The edging unit can be realized: the spray gun sprays the fiber mixture to the front of the electric heating roller and the edge of the bonding sheet, and the electric heating roller presses the fiber mixture into the resin at the edge of the bonding sheet, and can be sprayed multiple times - The hot pressing step enables the fiber mixture to sufficiently cover the edges of the bonding sheet. For the above-mentioned edging unit, it may further include a plurality of sets of limited width baffles, each of the set of width limiting baffles comprises two pieces, respectively disposed on two sides of each set of upper and lower electric heating rollers, and one side of the upper side is left For the gap through which the edge of the bonding sheet passes, the size of the slit can be set to automatically adapt to the thickness of the bonding sheet, and the spacing of the two side flaps is slightly larger than the width of the electric heating roller, and the spray-hot pressing working surface can be restricted by setting the limiting baffle The width of the widened baffle allows the edge of the bonded sheet to be smooth.

In the above two technical solutions, the material tank is used for holding a fiber mixture; the spray gun assembly may be composed of an air pump, a pipe and a plurality of spray gun nozzles, and the fiber tank is supplied from the material tank to the spray gun assembly. The air pump generates compressed air to drive the fiber mixture, and the jetting speed can be adjusted to meet the edging speed through the nozzle of the spray gun; the material recycling component can be composed of an air pump, a pipe and a plurality of air vents for The fiber mixture that is not adhered or pressed into the edge of the bonding sheet is recycled to the material tank for recycling, and the air blowing function can generate a certain degree of negative pressure inside the edging chamber to prevent the fiber mixture from overflowing the side of the edging chamber casing. Gap.

The invention has the beneficial effects that the method and the supporting equipment of the invention can continuously and efficiently entangle the bonding sheets on the production line, so that the copper clad laminate, the insulating board and the multilayer circuit board can not flow when pressed.

The detailed description of the present invention and the accompanying drawings are to be understood,

DRAWINGS

1 is a flow chart showing a production process of a conventional bonding sheet, in which an adhesive sheet is used for preparing a copper clad laminate as an example.

2 is a flow chart showing the production process of the bonding sheet in the present invention, which adds a radial edging process and a weft edging process to the original copper clad laminate process.

Figure 3 is a schematic view (front view) of the trimming unit of the radial trimming edge wrapping machine.

Figure 4 is a schematic view (side view) of the trimming unit of the radial trimming edge wrapping machine.

Figure 5 is a schematic view of the baking subunit of the hot melt blowing method supporting device (front view).

Figure 6 is a schematic view (side view) of the spun unit of the hot melt blowing method.

Figure 7 is a schematic diagram of the leveling subunit of the equipment for hot melt blowing method (front view).

Figure 8 is a schematic diagram of the edging unit (side view) of the equipment for the fiber-optic hot pressing method.

Figure 9 is a schematic view of the edging unit of the fiber-optic hot pressing method (front view).

Fig. 10 is a schematic view (top view) of the edging unit of the equipment for the fiber-spraying hot pressing method.

Marked in the figure: 1, bonding sheet, 2, power driven roller, 3, radial cutting knife, 4, reflector, 5, infrared tube, 6, baking chamber shell, 7, material tank, 8, Spray chamber housing, 9, spray gun nozzle, 10, material exhaust assembly exhaust, 11, electric roller, 12, trimming knife, 13, resin and fiber mixture, 14, edging chamber housing, 15. Limiting the baffle; the hollow arrow indicates the direction of travel of the bonding sheet.

detailed description

In order to further explain the effects of the technical means adopted by the present invention, the following detailed description will be made in conjunction with the preferred embodiments of the invention and the accompanying drawings.

Taking the 41"×49"-7628-epoxy bonded sheet commonly used in the copper clad industry as an example, the implementation of the present invention includes the following steps:

Step 1. Take the wood pulp and infiltrate the 2-methylimidazolium solution to prepare a dry and loose fiber mixture. The 2-methylimidazole is present in the fiber mixture in an amount of about 8% by weight.

Step 2. On the bonding sheet production line, the production speed is about 15.6 m/min, and the thickness of the bonding sheet is about 0.22 mm. Radial trimming Edge wrapping machine (this step is completed by the auxiliary equipment of hot melt blowing method), placed on the bonding sheet production line to complete the baking process, one on each side.

Step 3: The bonding sheet passes through the trimming unit of the radial trimming edge wrapping machine, the trimming knife and the upper and lower roller sets cooperate to complete the cutting of the weft yarn of the bonding sheet (in actual production, the offset and shaking of the bonding sheet may be Will cut to the diameter of the yarn).

Step 4: After the burrs are cut off, the bonding sheet passes through the baking subunit of the radial trimming edge wrapping machine, and the upper and lower chambers of the baking subunit work simultaneously, the infrared lamp heats up, and the metal cover reflects the focus to the bonding sheet. The edge of the edge of 2mm makes the resin at the edge of the bonding sheet melt quickly. The power of the infrared tube is automatically adjusted according to the production speed of the bonding sheet, ensuring that the resin at the edge of the bonding sheet can be quickly melted without coking. If the bonding sheet production line is stopped, the infrared lamp will be automatically extinguished. The width of the slit on one side of the baking chamber casing automatically adapts to the thickness of the bonding sheet.

Step 5, the bonding sheet passes through the spun subunit of the radial trimming edge wrapping machine, and the upper and lower chambers of the spun fiber subunit work simultaneously, and the fiber mixture is sprayed by the spray gun under the driving of compressed air, and the spray is sprayed until the resin has melted. The edge of the bonding sheet is such that the fiber mixture adheres to a certain thickness at the edge of the bonding sheet. The unadhered fiber mixture is recycled to the material tank for recycling through the material recycling assembly, and the exhaust of the material recycling component can also maintain a certain degree of negative pressure in the fiber chamber to prevent the fiber mixture from passing through the side of the fiber chamber. The gap overflows. The width of the slit on the side of the shell of the chamber is automatically adapted to the thickness of the sheet. The spray rate automatically adapts to the production speed of the bonded sheet.

Step 6. After the fiber is sprayed, the edge of the bonding sheet to which the fiber mixture is adhered passes through the flattening subunit of the radial trimming edge wrapping machine, and the upper and lower sets of electric heating rollers roll and adhere the edge of the bonding sheet of the fiber mixture. The edge thickness was kept at 0.22 mm. The electric heating roller used here has a width of 2 mm. The resin and fiber mixture mixture from the edge is extruded and trimmed with a trimming knife to smooth the edges.

Step 7. After the bonded sheet is finished by the radial trimming, the strip is sliced by a weft slicer, and the weft wrapping machine is used after the slicing (in this example, the step is completed by the accessory equipment of the fiber-spray hot pressing method). Welding, performing a weft slicing and wrapping action on the bonding sheet every 1.050mm, and then resetting; the details are as follows:

After the movement of the bonding sheet is stopped, the weft slicing knife in the weft slicer performs the weft slicing on the bonding sheet;

The edging unit of the weft edging machine follows the dicing blade, and the edge of the bonding sheet enters the edging chamber from the gap on the side of the edging chamber casing, and the gap width automatically adapts to the thickness of the bonding sheet; the material tank supplies the fiber mixture to the lance assembly The upper and lower sets of spray gun nozzles simultaneously spray the fiber mixture to the upper and lower sides of the edge of the bonding sheet; the upper and lower sets of electric heating rollers are alternately distributed with the spray gun nozzle. The width of the electric heating roller used here is 2 mm, and the gap between the upper and lower roller sets is maintained at 0.22. Mm, the fiber mixture is pressed into the resin at the edge of the bonding sheet three times, and the edge of the bonding sheet after the edging is 0.22 mm; the spacing of the two side dams of the limiting width is set to 2.04 mm. The width of the spray-hot press working surface can be limited, so that the edge of the bonding sheet after the edging is clear and smooth; the fiber mixture not pressed into the resin at the edge of the bonding sheet is recycled to the material tank for recycling through the material recycling component, The extraction of the material recycling component also maintains a certain degree of negative pressure in the rim chamber to prevent the fiber mixture from escaping through the gaps on the sides of the edging housing.

Step 8. Pressing the CCL: Take 6 pieces of the fiber-wound bond sheet and 6 unbagged bond sheets made through the above steps, keep the original process parameters unchanged in the same press, and press-combine Single-sided copper clad laminate and uncovered single-sided copper clad laminate.

Table 1: Flow-through and gap width values of the fiber-coated edge-clad copper clad laminate and unwrapped copper clad laminate (mm)

	喷纤包边单面覆铜板Blasting edging single-sided copper clad laminate	未包边单面覆铜板Unwrapped single-sided copper clad laminate
基材外缘流胶Substrate outer edge flow adhesive	0～0.50 to 0.5	5～165~16
基材內缘缺胶Substrate inner edge lack of glue	00	3～93 to 9

Table 1 shows that the outer edge of the uncoated copper clad laminate has a clear flow of glue, and the inner edge of the substrate is also lacking due to the flow problem. The edge of the fiber-coated copper clad laminate is substantially non-flowing, indicating that in the initial stage of the press-fitting process, that is, the initial stage of the heat-melting of the bonding sheet, the 2-methylimidazole in the fiber mixture has made the resin at the edge of the bonding sheet fast. Curing, combined with the mechanical barrier effect of the wood pulp fiber adhered to the edge of the bonding sheet, the edge is closed, so that the glue does not flow out substantially, and the inner edge of the substrate is not lacking in glue.

Claims

A production process for controlling a copper clad flow adhesive, characterized in that, in the production process of the conventional adhesive sheet, after the bonding sheet baking and the radial trimming process are completed, the radial wrapping is performed, and the bonding sheet is After the weft sizing, the weft edging is performed, and the radial edging and the weft edging are both subjected to a blasting method, and the blasting method is a hot melt blowing method or a fiber spinning hot pressing method.
The bonding sheet production process for controlling a copper clad flow adhesive according to claim 1, wherein the hot melt blowing method comprises the following steps:

Step 1. Heating the edge of the bonding sheet to melt the resin;

Step 2, spraying the fiber mixture to the edge of the bonding sheet to adhere thereto;

Step 3. Leveling and trimming the edges of the bonding sheets to which the fiber mixture is adhered to make the thickness uniform and the edges smooth.
The bonding sheet production process for controlling a copper clad flow adhesive according to claim 1, wherein the fiber spinning hot pressing method comprises the following steps:

Step 1, directly spraying the fiber mixture to the edge of the bonding sheet;

Step 2: using an electric heating roller to press the fiber mixture into the resin at the edge of the bonding sheet;

Step 3. Repeat steps 1 and 2 to fully cover the edges of the bonding sheet with the fiber mixture.
An accessory device for controlling a production process of a copper clad flow glue, comprising: a radial trimming edge wrapping machine and a weft wrapping machine, the radial trimming edge wrapping machine comprising a trimming unit and a beading unit The weft wrapping machine comprises a hemming unit; the trimming unit is used for cutting the weft burr of the bonding sheet, and the wrapping unit is used for wrapping the edge of the bonding sheet after the radial trimming or the weft slicing.
The accessory device for controlling the production process of a copper clad flow glue according to claim 4, wherein the trimming unit comprises a radial trimming knife and a power driven upper and lower roller group, and the upper and lower roller groups are used for The edge of the bonding sheet is pressed up and down, and the radial cutting knife is in close contact with the outer circular surface of the roller group, and the cutting edge coincides with the axial center line of the outer circular surface of the upper and lower roller groups, and faces the opposite direction of the advancement of the bonding sheet.
The accessory device for controlling the production process of a copper clad flow adhesive according to claim 4, wherein the device is used for a hot melt blowing method, and the wrapping unit comprises a baking subunit and a spun fiber. a unit and a leveling subunit, the baking subunit is configured to melt the edge of the trimmed or sliced bonding sheet, and the spun subunit is used for spraying the fiber mixture to the edge of the resin melted sheet, and the flattening subunit is used The edges of the bonding sheets to which the fiber mixture is adhered are leveled and trimmed.
The accessory device for controlling the production process of a copper clad glue according to claim 6, wherein the baking subunit comprises a baking chamber casing, an infrared lamp tube and a reflection cover, and the baking chamber casing is In forming a closed baking work space, a gap is provided on one side of the middle portion for the edge of the bonding sheet, and the inner width of the baking chamber outer casing at the slit is narrowed to the width of the bonding sheet to be covered, and the gap is bounded. The baking room is divided into upper and lower chambers, and the infrared lamp tube is divided into upper and lower chambers for heating at the same time on the upper and lower sides of the bonding sheet. The reflector is divided into upper and lower chambers for focusing the infrared tube light on the bonding sheet. The jetting subunit comprises a material tank, a fiber chamber housing, a spray gun assembly, a material recovery assembly, the material tank is for holding the fiber mixture and feeding the spray gun assembly, and the spray chamber housing is used for forming a closed In the fiber-spraying work space, a gap is provided on one side of the middle portion for the edge of the bonding sheet, and the inner width of the outer casing of the fiber-spraying chamber is narrowed to the width of the bonding sheet to be covered, and the gap is bounded by the gap chamber. Divided into upper and lower chambers, spray gun assembly gun It is divided into two chambers for simultaneously spraying the fiber mixture from the upper and lower sides to the edge of the resin melted bonding sheet, and the material recovery component is used for recycling and recycling the fiber mixture not adhered to the edge of the bonding sheet, and the air is exhausted. The mouth is set in two rooms;

The flattening subunit comprises an upper and lower electric heating roller group and a trimming knife, and the upper and lower electric heating roller group is used for pressing the edge of the bonding sheet up and down, the trimming knife is closely attached to the outer circular surface of the roller group, and the cutting edge and the upper and lower electric heating roller are arranged. The axial centers of the outer circular faces of the group coincide, facing the opposite direction of advancement of the bonding sheets. .
The accessory device for controlling a production process of a copper clad laminate according to claim 4, wherein the device is used for a fiber-spray hot pressing method, and the edging unit comprises a fiber mixture for containing a fiber mixture. a material tank, a edging chamber casing for forming a closed edging working space, a spray gun assembly for spraying a fiber mixture to the edges of the bonding sheet at the same time on the upper and lower sides, for pressing the fiber mixture into the edge of the bonding sheet a plurality of upper and lower electric heating roller groups in the resin, a material recycling component for recovering the uncompressed fiber mixture to the material tank, and a gap for the edge of the bonding sheet is left on the middle side of the outer casing of the edging chamber, the spray gun nozzle And the electric heating roller is alternately distributed along the traveling direction of the bonding sheet, and the nozzle of the spray gun faces the front of the pressing surface of the electric heating roller and the bonding sheet.
The accessory device for controlling the production process of a copper clad glue according to claim 8, wherein the edging unit further comprises a plurality of sets of width limiting baffles, and each set of the widened baffles comprises Two pieces are respectively disposed on two sides of each group of upper and lower electric heating rollers, and a slit is provided in the middle of one side for the edge of the bonding sheet, and the spacing of the two side baffles is larger than the width of the electric heating roller, and is used for limiting the spray-hot pressing The width of the work surface.