TWI614138B - Multiple chamber laminating machine of the printed circuit board of the electromagnetic heating - Google Patents

Abstract

The invention discloses an electromagnetically heated multi-cavity laminating machine for PCB boards, comprising: a compression chamber with a certain internal space; a compression assembly provided in the compression chamber, the compression assembly including at least three compression boards, The pressing plates are parallel to each other, and two adjacent pressing plates are separated by a certain distance so as to form at least two pressing cavities; an electromagnetic heating component is provided in the pressing room, and the electromagnetic heating component includes An electromagnetic induction coil of an alternating magnetic field, the electromagnetic induction coil is arranged in a heating plate, and the heating plate is provided on at least one of the pressing plates, and the inside of the electromagnetic induction coil is hollow to form a cooling through both ends thereof. aisle. The electromagnetically heated PCB multi-cavity laminator provided by the present invention can ensure the uniformity and stability of temperature transmission during hot pressing and cold pressing to reduce the deformation rate of the PCB during pressing.

Description

Multi-cavity laminating machine for electromagnetically heated PCB board

The present invention relates to a PCB multi-cavity laminator, and more particularly, to an electromagnetically heated PCB multi-cavity laminator.

A PCB is a printed circuit board, which is also called a printed circuit board or a printed circuit board. It is a provider of electrical connections for electronic components. Generally speaking, a printed circuit board: a non-conductive substrate is covered with one or two layers of copper foil (conductive layer), which are called single / double-sided circuit boards, and then the printed circuit is used to connect the designed circuit The lines to be retained are printed (corrosion-resistant media) on the copper foil, immersed in corrosive liquid to etch away the copper foil without protective coating, clean away the corrosive residual liquid, locate and punch holes, and apply flux, etc., that is, It is complete. The role of the PCB is as if a crop needs to grow in the soil: one is to provide electrical connections between electronic components through copper foil lines; the other is to provide physical support for electronic components. The main advantages of using a PCB board are greatly reduced wiring and assembly errors, and improved automation and labor productivity.

At this stage, in the pressing process of PCB boards, especially for PCB products with two or more layers, the pressing process mainly includes hot pressing and cold pressing. Hot pressing is to heat the prepreg (such as epoxy resin material) and apply a certain pressure such as 200-500PSI / cm2 to melt and solidify the prepreg into the required multilayer circuit board. The cold pressing process is to cool the circuit to the required temperature after the hot pressing is completed according to the cooling rate required by the process. degree. In the conventional copper foil conductive heating and pressing machine, the conductive foil is heated by continuously winding the copper foil, and there is a heating plate on the upper and lower sides of the cavity, the main function of which is to assist the heating of PCB products. The main disadvantages of the existing PCB laminator are: the heating method used by most existing laminators is electric heating rod heating or hot kerosene heating, short service life, difficult maintenance, large thermal lag, and difficult to accurately control temperature; The traditional copper foil conductive heating and pressing machine is only a hot pressing machine, which can only be used for the hot pressing process, not the cold pressing process. During the pressing process, it is easy to cause serious warpage and deformation of the PCB board products, and eventually lead to low yield of the PCB board. The production cost is too high; in the traditional cold pressing process, the temperature change of the middle layer product is small, which causes the surface layer and inner layer of the PCB board to shrink more, which causes the PCB board to deform and warp, resulting in certain scraps and increasing scrap costs; In the existing voltage machine, using a cavity to work can easily lead to uneven thickness of the PCB after lamination or the risk of lamination bubbles. The greater the number of lamination layers, the greater the cumulative pressure error and the more obvious the problem.

In view of the shortcomings in the above technology, the object of the present invention is to provide an electromagnetically heated multi-cavity laminating machine for PCB boards, which can ensure the uniformity and stability of temperature transmission during hot and cold pressing. Reduce the deformation rate of the PCB during the pressing process, reduce the scrap rate, improve the yield, and reduce production costs.

In order to achieve the above-mentioned object and other advantages according to the present invention, an electromagnetic heating PCB multi-cavity laminator is provided, comprising: a pressing chamber having a certain internal space; and a pressing assembly provided in the pressing chamber. The pressing component includes at least three pressing plates, the pressing plates are parallel to each other, and two adjacent pressing plates are spaced apart from each other by a certain distance to form at least two pressing chambers; wherein the pressing chamber is provided with Electromagnetic heating component including electromagnetic induction wire capable of generating alternating magnetic field The electromagnetic induction coil is disposed in a heating plate, and the heating plate is provided in at least one of the pressing plates. The electromagnetic induction coil has a hollow interior to form a cooling channel passing through both ends thereof.

Preferably, the pressing plate and the heating plate are fixedly connected or integrally formed.

Preferably, the electromagnetic heating component further includes an electromagnetic heating controller electrically connected to the electromagnetic induction coil, and the electromagnetic heating controller is electrically connected to a first connection point and a second connection point of the electromagnetic induction coil, respectively. As a result, an electromagnetic heating circuit is formed, so that the electromagnetic induction coil generates a changing alternating magnetic field.

Preferably, one end of the electromagnetic induction coil is provided with a liquid inlet, the other end of the electromagnetic induction coil is provided with a liquid outlet, and the cooling channel is in communication with the liquid inlet and the liquid outlet of the electromagnetic induction coil. A cooling system is externally connected to the liquid inlet and the liquid outlet of the electromagnetic induction coil, and the cooling system, the liquid inlet and the liquid outlet of the electromagnetic induction coil, and a cooling channel form a cooling circulation circuit.

Preferably, the electromagnetic induction coil is arranged in multiple "S" -shaped folds or spirals.

Preferably, the electromagnetically heated PCB multi-cavity laminator further includes a hydraulic device externally connected to the pressing component, and a driving part of the hydraulic device provides a pressing pressure for the pressing component; the hydraulic pressure The device includes a hydraulic cylinder and an oil pump, and a driving end of the hydraulic cylinder provides a pressing pressure for the pressing plate located at the lowest level.

Preferably, the electromagnetically heated PCB multi-cavity laminator further includes a cooling module for cooling the pressing chamber, and the cooling module is an air-cooled module, which includes: A circulating air duct pipe constituting a loop; a main solenoid valve, a variable frequency fan unit and a cooling unit which are sequentially arranged in the air flow direction of the circulating air pipe; the variable frequency fan unit includes a first variable frequency fan and a second variable frequency fan, A first frequency conversion fan is provided at an air outlet of the circulating air duct, a first supplementary air outlet is provided at an air outlet of the first frequency conversion fan, and a first solenoid valve is provided at the first supplementary air outlet. Main solenoid valve A second supplementary air outlet is provided between the second frequency conversion fan and the second supplementary air outlet, and a second solenoid valve is provided on the second supplementary air outlet. The air outlet of the circulating air duct is provided on the top of the compression chamber to circulate the air duct. The air inlet of the tube is set at the bottom of the compression chamber.

Preferably, at least two guide posts are further provided in the pressing chamber, and the pressing board can slide up and down along the guide posts. The inside of the guide post has a hollow structure. One end of the guide post is provided with an air exhaust port, and the air exhaust port is externally connected with an air extraction device. The outer wall of the guide post is provided with a vent hole communicating with the inside of the guide post.

Preferably, the pressing room is provided with at least one door, and the door includes a door panel and door covers provided on both sides of the door panel, the door cover and a door frame leading to the pressing room. They are fixedly connected, and the door panel is nested between the two door covers and can slide up and down along the door covers to realize the opening and closing of the pressing chamber.

Preferably, the door cover includes a door cover main body and a U-shaped groove portion formed in the door cover main body, the U-shaped groove portion extending in a height direction of the door cover main body; both sides of the door panel At least one bearing is provided, and the bearing is engaged with the U-shaped groove portion; the U-shaped groove portion is provided with two end portions, which are respectively close to the inner end portion of the door frame of the pressing chamber and away from the U-shaped groove portion. The outer end portion of the compression chamber door frame has a width greater than a width of the inner end portion.

Compared with the prior art, the present invention has the following beneficial effects: 1. Due to the heating method using electromagnetic heating, electromagnetic heating basically does not generate heat due to the electromagnetic induction coil itself, has a long service life, and has low maintenance and replacement costs. The pressing plate generates heat by the action of a variable electromagnetic field, with sufficient heat utilization and small heat loss. The heat is collected inside the heating plate or the pressing plate. The temperature of the surface of the electromagnetic induction coil is slightly higher than room temperature, which can be safely touched without heat protection. It is safe and reliable; The internal heating method is adopted to make the heating plate or pressing plate directly generate magnetic energy and generate heat. The thermal response is fast, and the average preheating time is shortened by more than 60% compared with traditional heating methods such as resistance coil heating. The rate is as high as more than 90%. Under the same conditions, it can save electricity by 30 ~ 70% compared to the resistance coil heating. At the same time, it improves the production efficiency. The electromagnetic induction coil itself does not generate heat, the thermal blockage is small, the thermal inertia is low, and the temperature control is accurate and real-time. Improve product quality; 2. Because the pressing room is provided with an electromagnetic heating component and a cooling component, the hot and cold pressing can be integrated. Since it does not need to be transferred to a cold press or other cooling mechanism for cooling, the transfer process is avoided. The internal pressure of the PCB product after intermediate pressure is affected by the environmental temperature difference, in addition, it also avoids the warping deformation of the PCB product caused by the pressure restraint effect of the pressure plate which has lost the upper and lower layers during the transfer process, and due to the surface contact Cooling, and by adjusting the flow rate, pressure, flow rate and temperature of the conductive liquid or cooling air, it can effectively control the cooling speed and uniformity of the cooling temperature of the PCB board product (the temperature difference between the board and the interior), and further reduce the production of PCB board products Problems such as irregular deformation. In addition, after the cold pressing is completed, the temperature of the plywood is directly reduced to the temperature required by the process, and it can be opened directly. The next batch of production does not require additional cooling time, and the equipment is highly efficient, further improving production efficiency. 3. Unlike the existing technology, heating or cooling can only be performed by heat conduction from the upper and lower ends of the PCB board product. Since the pressing board with heating and cooling functions is provided between the PCB board product packages, heating or cooling can be started between two adjacent PCB board product packages, whether it is a hot pressing process or a cold pressing process. It greatly accelerates the heating or cooling process of the PCB board product package. In addition, it can further control the heating speed and heating temperature of the PCB board product package or the uniformity of the cooling speed and cooling temperature, thereby further reducing the occurrence of irregularities in the PCB board product. Problems such as deformation; 4. At least two pressing cavities are formed due to a certain distance between two adjacent pressing plates. Using this multi-cavity design, the number of production plates is controlled between 10 and 50 layers. Some special-designed PCBs with uneven copper distribution inside the PCB or PCBs with corresponding copper positions on each layer in the multilayer circuit, and PCBs with more than 10 layers Effective control of the production volume of the body, can be effective in reducing or avoiding residual The pressure error caused by the accumulated copper can well solve the problems of uneven thickness and pressure bubbles of the PCB after pressing due to the accumulated pressure error caused by the residual copper; 5. The U-shaped groove has two ends, respectively In order to approach the inner end of the door frame of the compression chamber and the outer end of the door frame remote from the compression chamber, the width of the outer end is greater than the width of the inner end. Multiple seals are provided; the sealing ring provided between the door and the door frame of the compression chamber further improves the tightness of the door.

100‧‧‧ Multi-cavity laminating machine for PCB with electromagnetic heating

110‧‧‧Compression Room

111‧‧‧Left plate

111a‧‧‧left base

112a‧‧‧right base

112‧‧‧Right plate

113‧‧‧Top plate

114‧‧‧Medium plate

115‧‧‧observation window

120‧‧‧hydraulic device

121‧‧‧Hydraulic cylinder

130‧‧‧room door

131‧‧‧Door Cover

131a‧‧‧ inside end

131b‧‧‧outer end

131c‧‧‧U-shaped groove

132‧‧‧Door panel

132a‧‧‧bearing

133‧‧‧Drive cylinder

134‧‧‧Sealing ring

140‧‧‧Safety switch assembly

141‧‧‧Signal transmitter

142‧‧‧Signal Receiver

150‧‧‧Compression Assembly

151‧‧‧Support plate

152‧‧‧ pad

153‧‧‧Lower insulation board

154‧‧‧Plywood

154a‧‧‧roller

154b‧‧‧Compression cavity

154c‧‧‧cooling pipe

155‧‧‧ Upper heat shield

156‧‧‧Guide Post

156a‧‧‧Exhaust port

156b‧‧‧Slide rail groove

157‧‧‧ limit post

157a‧‧‧Limit block

158‧‧‧ Oil collecting assembly

158a, 158a’‧‧‧ oil return column

158b, 158b’‧‧‧ oil column

159‧‧‧flexible tube

160‧‧‧PCB board package

161‧‧‧ partition

162‧‧‧copper foil

163‧‧‧Prepreg

164‧‧‧Inner circuit board

170‧‧‧Air-cooled components

171‧‧‧Circulation air duct

172‧‧‧Main solenoid valve

173‧‧‧Second Variable Frequency Fan

174‧‧‧cooling unit

175‧‧‧second supplementary air outlet

175a‧‧‧Second Solenoid Valve

176‧‧‧The first inverter fan

177‧‧‧The first supplementary air outlet

177a‧‧‧The first solenoid valve

180‧‧‧ heating plate

190‧‧‧ electromagnetic induction coil

191‧‧‧Inlet

192‧‧‧ Outlet

193‧‧‧The first connection point

194‧‧‧Second connection point

195‧‧‧cooling channel

FIG. 1 is a schematic structural diagram of a PCB board for manufacturing a PCB board enclosed in an electromagnetically heated PCB board multi-cavity laminator according to the present invention; FIG. 2 is an electromagnetically heated PCB board according to the present invention; Axonometric view of a multi-cavity laminator; Figure 3 is an isometric view of an electromagnetically heated PCB board multi-cavity laminator according to the present invention; and FIG. 4 is a multi-cavity laminate of an electromagnetically heated PCB board according to the present invention Top view of the machine; Figure 5 is a front view of the electromagnetically heated PCB board multi-cavity laminator according to the present invention; Figure 6 is a right side view of the electromagnetically heated PCB board multi-cavity laminator according to the present invention; Figure 7 4 is a cross-sectional view along the AA direction in FIG. 4; FIG. 8 is a cross-sectional view along the BB direction in FIG. 4; FIG. 9 is a partially enlarged view at C in FIG. 4; and FIG. 10 is a first isometric view of the compression assembly according to the present invention; FIG. 11 is a second isometric view of the compression assembly according to the present invention; FIG. 12 is a right side view of the compression assembly according to the present invention; FIG. 13 is a front view of the compression assembly according to the present invention; FIG. 14 is a schematic partial internal view of the compression assembly according to the present invention; FIG. 15 is a partially enlarged view at D in FIG. 14; FIG. 16 is a guide post of the electromagnetically heated PCB board multi-cavity laminator according to the present invention Structural drawing; FIG. 17 is an isometric view of the plywood according to the present invention; FIG. 18 is a front view of the plywood according to the present invention; FIG. 19 is a cross-sectional view taken along the EE direction in FIG. 18; and FIG. 20 is the PCB in FIG. Structural diagram of the board package; Figure 21 is a XY direction expansion and contraction diagram of the PCB board product after cold pressing with a conventional cold press; Figure 22 is a result of pressing with a multi-cavity lamination machine for a PCB board with electromagnetic heating according to the present invention Expansion and contraction diagram of XY direction of PCB board products for cold pressing; Fig. 23 is an XY expansion and contraction trend chart of PCB board products after cold pressing by conventional cold press; Fig. 24 is electromagnetic heating according to the present invention The XY direction expansion and contraction trend of the PCB board multi-cavity laminator for cold-pressing the pressed PCB board products; Figure 25 is a conventional multi-cavity PCB board cold-pressing with a conventional cold press and the electromagnetic heating of the present invention. Comparison of the expansion and contraction of the laminator in the X direction; Figure 26 shows the cold pressing of a conventional cold press and the electromagnetic heating of the present invention. Comparison of the expansion and contraction of the PCB board multi-cavity laminator in the Y direction; Figure 27 is the largest expansion and contraction chart of the conventional cold press single layer PCB board in the XY direction; Figure 28 is the electromagnetic heating according to the present invention. XY direction maximum expansion and contraction chart of PCB board multi-cavity laminator cold pressing single layer PCB board; FIG. 29 is a cross-sectional view of an electromagnetically heated PCB board multi-cavity laminator according to the present invention when air-cooled components are connected; FIG. 30 is a schematic structural diagram of an electromagnetic induction coil provided in a pressing board according to the present invention; FIG. 31 is The structure schematic diagram of the electromagnetic induction coil according to the present invention disposed in a heating plate; FIG. 32 is the structure diagram of the electromagnetic induction coil according to the present invention.

The following further describes the present invention in detail with reference to the accompanying drawings. The foregoing and other objects, features, aspects, and advantages of the present invention will become more apparent, so that those skilled in the art can implement the present invention with reference to the description text.

1 and 20, a PCB board package 160 to be pressed is placed in each pressing cavity 154b of the multi-cavity hot press 100 according to the present invention, and each PCB board package 160 to be pressed is sequentially stacked by at least one PCB board Stacked, in order to prevent the PCB boards from sticking during the pressing process, a thermally conductive and anti-adhesive spacer 161 is provided between two adjacent PCB boards and between the PCB board and the pressing board 154. In an embodiment, the multi-cavity hot press 100 is provided with two pressing cavities 154b, and each pressing cavity 154b has a PCB board package 160 to be pressed, and each PCB board package 160 to be pressed is a PCB board. C1, C2, and C3 are stacked in order from top to bottom. As an example, the structure of each layer of the PCB is shown in FIG. 20, which mainly includes two copper foils 162 located on the outermost side, two copper foils 163 adjacent to the copper foil 162, and an inner layer circuit held by the copper foils 163. Board 164.

Referring to Figures 1-32, the electromagnetically heated PCB multi-cavity laminator 100 includes: a control system (not shown), a crimping chamber 110, a hydraulic device 120, a chamber door 130, a safety switch assembly 140, and a crimping Component 150. Wherein, the compression chamber 110 has a certain internal space, and the compression chamber 110 includes an air extraction device (not shown) for generating a vacuum inside the compression chamber 110, and the compression chamber 110 is provided with a cooling component and an electromagnetic heating component; The pressing assembly 150 is disposed in the internal space of the pressing chamber 110, and the pressing assembly 150 includes at least three pressing plates. 154, the pressing plates 154 are parallel to each other, and two adjacent pressing plates 154 are separated by a certain distance to form at least two pressing cavities 154b. The PCB board package 160 to be pressed is placed in each pressing cavity 154b for heating Pressing or cold pressing, the upper surface of the plywood 154 located at the uppermost layer and the lower surface of the plywood 154 located at the lowermost layer are adjacent to the upper heat insulation plate 155 and the lower heat insulation plate 153, and the upper heat insulation plate 155 and the lower heat insulation, respectively. The plates 153 are all made of a heat-insulating material with a certain structural strength. The hydraulic device 120, the safety switch assembly 140, the electromagnetic heating assembly, and the cooling assembly are all electrically connected to the control system.

As an embodiment, the electromagnetic heating component includes an electromagnetic induction coil 190 capable of generating an alternating magnetic field, and an electromagnetic heating controller (not shown) electrically connected to the electromagnetic induction coil 190.

As an embodiment, the electromagnetic induction coil 190 is disposed in at least one of the pressing plates 154, and the pressing plate 154 is made of a magnetically conductive material with a certain structural strength.

As an example, the electromagnetic induction coil 190 is disposed in a heating plate 180. The heating plate 180 is made of a magnetically permeable material having a certain structural strength. At least one of the pressing plates 154 is provided with the heating plate 180. The pressing plate 154 is fixedly connected or integrally formed with the heating plate 180. The heating plate 180 includes a substrate and a cover covering the substrate. The substrate is provided with a shape corresponding to the electromagnetic induction coil 190. Matching grooves.

As an example, the electromagnetic heating controller is electrically connected to the first connection point 193 and the second connection point 194 of the electromagnetic induction coil, respectively, so as to form an electromagnetic heating circuit, so that the electromagnetic induction coil 190 changes and changes. Magnetic field; electromagnetic heating controller rectifies AC power into DC power, and then converts DC power into high-frequency high-voltage power. High-speed high-frequency high-voltage current flowing through the electromagnetic induction coil 190 generates a high-speed alternating magnetic field. When the magnetic field lines in the magnetic field When the magnetically-conductive pressing plate 154 or the heating plate 180 is passed, the pressing plate 154 or the heating plate 180 automatically generates heat at high speed.

As an example, the inside of the electromagnetic induction coil 190 is hollow to form a cooling channel 195 penetrating its two ends. One end of the electromagnetic induction coil is provided with a liquid inlet 191, and the other end of the electromagnetic induction coil is provided. A liquid outlet 192, the cooling channel 195 is in communication with the liquid inlet 191 and the liquid outlet 192 of the electromagnetic induction coil; the liquid inlet 191 and the liquid outlet 192 of the electromagnetic induction coil are externally connected with a cooling system, The cooling system, the liquid inlet 191 and the liquid outlet 192 of the electromagnetic induction coil, and the cooling channel 195 constitute a cooling circulation circuit; a cooling liquid (such as oil or water) with a controllable temperature and flow rate is introduced into the cooling channel 195 Therefore, the electromagnetic induction coil 190 and the pressing plate 154 or the heating plate 180 can be efficiently and rapidly cooled. In addition to further improving the cooling speed, the electromagnetic induction coil 190 and the pressing plate 154 or the heating plate 180 can also be used for cooling and protecting the electromagnetic induction coil 190 and the pressing plate 154 or the heating plate 180. Its reliability reduces the replacement cost. In addition, the method of passing cooling liquid into the cooling channel 195 of the electromagnetic induction coil can minimize the structural complexity and It affects the cooling efficiency.

As an embodiment, the electromagnetic induction line 190 is provided in a multiple “S” -shaped folded or spiral shape, and other shapes capable of generating an alternating magnetic field.

As an example, the axis Z1 of the electromagnetic induction coil 190 is parallel to the center normal line Z2 of the pressing plate 154 or the heating plate 180.

In one embodiment, a copper foil heating assembly is further included, which includes a copper foil provided in the pressing cavity 154b and a power controller electrically connected to the copper foil to heat the copper foil. Control, the copper foil is folded back and forth into a multiple "S" -shaped folding structure, so that a plurality of spaced accommodation chambers (not shown) are formed in the copper foil, and the PCB board package 160 to be pressed is placed After the receiving chamber, it is placed in the pressing cavity 154b.

In one embodiment, the compression chamber 110 includes a left plate 111, a right plate 112, a top plate 113, and a middle plate 114. The left plate 111, the right plate 112, the top plate 113, and the middle plate 114 form a certain internal space. In the pressing room 110, a left base 111a is provided at the bottom of the left side plate 111, and a right base 112a is provided at the bottom of the right side plate 112. The left base 111a and the right base 112a can be fixed to the ground by bolts to realize a pressing room. 110 fixed connection to the ground. The left side plate 111 and the right side plate 112 are provided with at least one observation window 115. In one embodiment, the left side plate 111 and the right side plate 112 are provided with two observation windows 115. In an embodiment, the pressing plates 154 are provided with three pieces, and there is a certain distance from each other to form two pressing cavities 154b. As shown in FIG. 1, each of the pressing cavities 154b has an assembled to be pressed. PCB board package 160.

In an embodiment, at least two guide posts 156, a pad plate 152 disposed under the lower heat-insulating plate 153, and a support plate 151 disposed under the pad plate 152 are further disposed in the pressing chamber 110. The compression plate 154, the upper heat insulation plate 155, and the lower heat insulation plate 153 are all restricted between the guide posts 156 and can slide up and down along the guide posts 156; the hydraulic device 120 is externally connected to the press assembly 150, and the driving of the hydraulic device 120 The portion provides a pressing pressure for the pressing component 150. As an embodiment, the hydraulic device 120 includes a driving motor, a plurality of pipelines, a hydraulic cylinder 121 and an oil pump driven by the driving motor. The driving end of the hydraulic cylinder 121 provides pressing power for the pressing plate 154 located at the lowest level. In an embodiment, the driving end of the hydraulic cylinder 121 of the hydraulic device 120 passes through the support plate 151 and interferes with the lower surface of the pad plate 152, and the hydraulic device 120 is electrically connected to the control system. In one embodiment, four guide posts 156 are provided on both sides of the pressing plate 154, the upper heat insulation plate 155, and the lower heat insulation plate 153, and the guide posts 156 penetrate the top plate 113, the backing plate 152, and the support plate. 151, so that the top plate 113, the backing plate 152, and the support plate 151 become a solid whole, wherein the backing plate 152 can slide up and down along the guide post 156 under the driving end of the hydraulic cylinder 121 of the hydraulic device 120.

In one embodiment, a slide rail groove 156b is provided on the inner side of each guide post 156, and rollers 154a are provided on the front and rear ends of each pressing plate 154. The pressing plate 154 cooperates with the slide rail groove 156b through the roller 154a. Thereby, the pressing plate 154 is slid down along the guide post 156.

In one embodiment, the inside of the guide post 156 has a hollow structure, and one end of the guide post 156 is provided with an air exhaust port 156a. The air exhaust port 156a is connected to the air extraction device. The guide post 156 is located inside the compression chamber 110. The outer wall is provided with a vent hole communicating with the inside of the guide post 156. With this structure, air can be sucked out at the suction port 156a to create a vacuum environment inside the compression chamber 110. In one embodiment, at least one pressure sensor and temperature sensor (not shown) are provided in each pressing cavity 154b, and the pressure sensor and temperature sensor are electrically connected to the control system and are used for pressing the cavity. The pressure and temperature inside 154b are monitored in real time.

In an embodiment, the cooling assembly includes a cooling pipe 154c, a cooling box, and a delivery pump. The cooling pipe 154c is disposed in the pressing plate 154. The liquid inlet and outlet of the cooling pipe 154c, and the delivery pump. The pump and the cooling tank constitute a cooling circulation circuit; during operation, the conductive liquid (which can be oil or water and other media) in the cooling tank is driven by the transfer pump to send the cooled conductive liquid to the liquid inlet of the cooling pipe 154c. And returning to the cooling box through the liquid outlet of the cooling pipe 154c to form a cooling circulation circuit; in an embodiment, an oil collecting assembly 158 is provided between the cooling pipe 154c and the cooling box, and the oil collecting assembly 158 includes an internal hollow oil inlet column 158b and an oil return column 158a. The liquid inlet of the cooling pipe is connected to the oil inlet 158b through a flexible pipe 159, and the liquid outlet of the cooling pipe is connected to the oil return through the flexible pipe 159. The column 158a communicates, and the oil inlet 158b 'of the oil inlet column and the oil return 158a' of the oil return column communicate with the cooling tank, respectively.

In one embodiment, the cooling pipe 154c is provided with a multiple “S” -shaped folding structure, and other shapes that facilitate the uniform arrangement of the cooling pipes 154c in the pressing plate 154 are provided. Group of cooling tubes 154c, the two groups of cooling tubes 154c are symmetrically arranged with respect to the center of symmetry of the pressing plate 154, thereby increasing the flow area of the conductive liquid in the cooling tube 154c, so as to improve the cooling of the cooling tube 154c in the pressing plate 01 effectiveness.

In an embodiment, as shown in FIG. 29, the cooling assembly includes an air-cooled assembly 170, and the air-cooled assembly 170 includes: a circulating air duct 171 forming a circuit with the compression chamber 110; Air duct 171 A main solenoid valve 172, a variable frequency fan unit, and a cooling unit 174 which are sequentially arranged in the direction of air flow; the variable frequency fan unit includes a first variable frequency fan 176 and a second variable frequency fan 173, and an air outlet of the circulation air duct 171 A first frequency conversion fan 176 is provided. A first supplementary air outlet 177 is provided at an air outlet of the first frequency conversion fan 176. The first supplementary air outlet 177 is provided with a first solenoid valve 177a. The main solenoid valve 172 and A second supplementary air outlet 175 is provided between the second frequency conversion fan 173, and a second electromagnetic valve 175a is provided on the second supplementary air outlet 175; the second frequency conversion fan 173, the first frequency conversion fan 176, the main solenoid valve 172, The second solenoid valve 175a, the first solenoid valve 177a, and the cooling unit 174 are controlled by the control system to timely adjust the amount of air and the temperature of the wind sent into the pressing chamber 110, so as to effectively perform the pressed PCB board package 160. Air-cooled cooling.

In an embodiment, the air outlet of the circulation air duct 171 is provided at the top of the compression chamber 110, and the air inlet of the circulation air duct 171 is provided at the bottom of the compression chamber 110 so as to form a "chimney effect", thereby The high-temperature air at the bottom of the compression chamber 110 is discharged more quickly and efficiently through the circulating air path pipe 171.

In an embodiment, the pressing chamber 110 is provided with at least one openable and closable chamber door 130 which is in communication with the outside. The chamber door 130 includes: a door plate 132; and door covers 131 provided on both sides of the door plate, wherein The door cover 131 is fixedly connected to the door frame leading to the inside of the pressing room 110, and the door plate 132 is nested between the two door covers 131 and can slide up and down along the door cover 131 to open or close the pressing room 110. In one embodiment, a chamber door 130 is provided on each of the front and back sides of the pressing chamber 110.

In an embodiment, the door cover 131 includes a door cover body and a U-shaped groove portion 131c formed in the door cover body, wherein the U-shaped groove portion 131c extends in a height direction of the door cover body, and the door panel Both sides of 132 are provided with at least one bearing 132a, and the bearing 132a is engaged with the U-shaped groove portion 131c, so that the door panel 132 slides up and down along the door cover 131. The U-shaped groove portion 131c has two ends, which are respectively close to the pressure. The width of the inner end portion 131a of the door frame of the bonding chamber 110 and the outer end portion 131b and the outer end portion 131b of the door frame away from the pressing chamber 110 It is larger than the width of the inner end portion 131a. In one embodiment, four bearings 132a are provided on both sides of the door panel 132. In one embodiment, a driving cylinder 133 for driving the door panel 132 to slide up and down is provided on the side of each door cover 131.

In one embodiment, a safety switch assembly 140 is provided between the two door covers 131. Specifically, the safety switch assembly 140 includes a signal transmitter 141 and a signal receiver 142 respectively disposed on the door cover 131 on both sides of the door panel 132, and drives. The air cylinder 133 and the safety switch assembly 140 are both electrically connected to the control system. When the door panel 132 is in the open state as shown in FIG. 5, such as when there is an object or an operator blocking between the signal transmitter 141 and the signal receiver 142, The control system sends a control signal. At this time, the door panel 132 will not fall until there are no other objects or operators between the number transmitter 141 and the signal receiver 142, thereby preventing the door panel 132 from being damaged or crushing the operator.

In an embodiment, a seal ring 134 is provided between the door 130 and the door frame of the compression chamber 110. The seal ring 134 is made of a heat-insulating material with a certain elasticity. The door plate 132 is also provided with a pressing device (not shown) for pressing the door plate 132 and the sealing ring 134 to seal the pressing chamber 110.

In an embodiment, at least two limiting posts 157 are provided on the left and right sides of the pressing plate 154, and at least one limiting block 157a is provided on the inner side of each limiting post 157 to remove the pressure of the uppermost layer and the lowermost layer. The plywood 154 and the rest of the plywood 154 are placed on the limiting block 157a when not pressed. In one embodiment, there are four limiting element columns 157, which are symmetrical about the plywood 154. The plying plate 154 is provided with five layers. The uppermost layer and the lowermost laminated plywood do not require the support of the limiting element block 157a. Therefore, the limiting blocks 157a are provided in three pieces, and when not pressed, the pressing plates 154 in the middle three layers are sequentially supported.

Working principle: The workers first stack the materials used to manufacture the PCB board as shown in Figure 20, and finally assemble the PCB board package 160 to be pressed as shown in Figure 1. After the assembly is completed, the PCB board package 160 to be pressed is assembled. Put into each pressing cavity 154b and wait for pressing; the door 132 of the control system control room door 130 falls, and closes the pressing Compression chamber 110, the air extraction device starts to evacuate the internal space of the compression chamber 110 into a vacuum environment; the driving end of the hydraulic cylinder 121 of the hydraulic device 120 starts to work, and applies a certain pressure below the pad 152, thereby sequentially pushing the lowermost layer The pressing board 154 starts to press the PCB board package 160 in the pressing cavity 154b. At the same time, the electromagnetic heating component starts to work, and the PCB board package 160 to be pressed is heated. The pressure and temperature during the pressing process The pressing time is adjusted by the control system. After the pressing is completed, the electromagnetic heating component stops working. At this time, the hydraulic device 120 maintains the pressure during pressing and the cooling component starts to work, such as the cooling pipe in the pressing plate 154. 154c is supplied with a continuous flow of conductive liquid whose temperature is controlled between 15 ° C and 35 ° C to cool the pressed PCB board package 160. This process is adjusted by the control system. When the control system detects the PCB board package When 160 is cooled to the set temperature of 45 ° C ~ 65 ° C, the supply of conductive fluid is stopped, the hydraulic device 120 starts to gradually reduce the pressure, and the chamber PCB 130 is opened to take out the pressed PCB board package 160. Wait for subsequent processing work.

Referring to FIG. 21 and FIG. 22, it can be seen that, compared with the conventional cold press and the electromagnetically heated PCB board multi-cavity laminator 100 according to the present invention, the expansion and contraction data in the XY direction (a distance of 500 to 620 mm) is also measured. The products produced by the electromagnetically heated PCB multi-cavity laminator 100 have almost the same amount of deformation in the upper, middle and lower layers. Compared with the traditional cold press, the deformation is very obvious. In addition, the temperature of the pressing plate 154 is directly after the cold pressing is completed. The temperature can be lowered to the temperature required by the process, and the next batch of production can be started directly. No additional cooling time is required. The equipment has high efficiency and further improves production efficiency.

Referring to FIG. 23 and FIG. 24, taking 350 pieces of boards to measure the XY direction (500 ~ 620mm distance) expansion and contraction data for statistics, it can be seen that the electromagnetically heated PCB board multi-cavity laminator 100 and the conventional cold press according to the present invention Compared with the products produced by the electromagnetically heated PCB multi-cavity laminator 100 of the present invention, the expansion and contraction data of the products are obviously concentrated, which is 30% to 40% lower than that of the products produced by the conventional cold press.

Referring to FIG. 25, FIG. 26, FIG. 27, and FIG. 28, it can be seen that the electromagnetically heated PCB board multi-chamber laminator 100 according to the present invention has more electromagnetically heated PCB boards than the conventional cold press. The maximum deformation of the single-piece PCB board produced by the cavity laminator 100 is 40-50% lower than that of the conventional voltage machine.

Although the embodiment of the present invention has been disclosed as above, it is not limited to the applications listed in the description and the embodiments, it can be applied to various fields suitable for the present invention, and can be easily implemented by those skilled in the art. Additional modifications are therefore made without departing from the general concepts defined by the claims and equivalents, and the invention is not limited to the specific details and illustrations shown and described herein.

100‧‧‧ Multi-cavity laminating machine for PCB with electromagnetic heating

110‧‧‧Compression Room

111‧‧‧Left plate

111a‧‧‧left base

112‧‧‧Right plate

112a‧‧‧right base

113‧‧‧Top plate

114‧‧‧Medium plate

115‧‧‧observation window

120‧‧‧hydraulic device

121‧‧‧Hydraulic cylinder

130‧‧‧room door

131‧‧‧Door Cover

132‧‧‧Door panel

132a‧‧‧bearing

133‧‧‧Drive cylinder

Claims (10)

An electromagnetically heated multi-cavity laminating machine for PCB boards, comprising: a compression chamber with a certain internal space; a compression assembly provided in the compression chamber, the compression assembly including at least three compression boards, the The pressing plates are parallel to each other, and two adjacent pressing plates are separated by a certain distance so as to form at least two pressing chambers; wherein the pressing chamber is provided with an electromagnetic heating component, and the electromagnetic heating component includes An electromagnetic induction coil of an alternating magnetic field, the electromagnetic induction coil is arranged in a heating plate, and the heating plate is provided on at least one of the pressing plates, and the inside of the electromagnetic induction coil is hollow to form a cooling through both ends thereof. aisle. The electromagnetically heated PCB board multi-cavity laminator according to item 1 of the scope of the patent application, wherein the pressing plate is fixedly connected to the heating plate or is integrally formed. The electromagnetic heating PCB multi-cavity laminator according to item 1 of the scope of patent application, wherein the electromagnetic heating component further includes an electromagnetic heating controller electrically connected to the electromagnetic induction coil, and the electromagnetic heating controller It is electrically connected to the first connection point and the second connection point of the electromagnetic induction coil, respectively, so as to form an electromagnetic heating circuit, so that the electromagnetic induction coil generates a changing alternating magnetic field. According to the electromagnetically heated PCB board multi-cavity laminator according to item 1 of the patent application scope, wherein one end of the electromagnetic induction coil is provided with a liquid inlet, and the other end of the electromagnetic induction coil is provided with a liquid outlet, The cooling channel is in communication with a liquid inlet and a liquid outlet of the electromagnetic induction coil; The liquid inlet and the liquid outlet of the electromagnetic induction coil are externally connected with a cooling system. The cooling system, the liquid inlet and the liquid outlet of the electromagnetic induction coil, and a cooling channel form a cooling circulation circuit. The electromagnetically heated PCB board multi-cavity laminator according to item 1 of the scope of the patent application, wherein the electromagnetic induction coils are arranged in multiple "S" -shaped folds or spirals. The electromagnetically heated PCB multi-cavity laminator according to item 1 of the patent application scope, further comprising a hydraulic device externally connected to the pressing component, and a driving part of the hydraulic device provides the pressing component. Pressing pressure; the hydraulic device includes a hydraulic cylinder and an oil pump, and a driving end of the hydraulic cylinder provides a pressing pressure for the pressing plate located at the lowest level. The electromagnetically heated PCB multi-cavity laminator according to item 1 of the scope of patent application, further comprising a cooling component for cooling the pressing chamber, wherein the cooling component is an air-cooled component and includes : A circulating air duct forming a circuit with the compression chamber; a main solenoid valve, a frequency conversion fan unit, and a cooling unit arranged in order in the air flow direction of the circulation air duct; the frequency conversion fan unit includes a first frequency conversion A fan and a second frequency conversion fan, a first frequency conversion fan is provided at an air outlet of the circulating air duct, a first supplementary air outlet is provided at an air outlet of the first frequency conversion fan, and the first supplementary air outlet is provided at A first solenoid valve, a second supplementary air outlet is provided between the main solenoid valve and a second frequency conversion fan, and a second solenoid valve is provided on the second supplementary air outlet; wherein the air outlet of the circulating air duct is provided At the top of the compression chamber, the air inlet of the circulating air duct is arranged at the bottom of the compression chamber. According to the electromagnetically heated PCB board multi-cavity laminator according to item 1 of the scope of patent application, wherein the pressing chamber is further provided with at least two guide posts, and the pressing board can slide down along the guide posts. The inside of the guide post is a hollow structure. One end of the guide post is provided with an air suction port, and the air suction port is externally connected with an air suction device. Stomata. The electromagnetically heated PCB board multi-cavity laminator according to item 1 of the scope of patent application, wherein the pressing chamber is provided with at least one chamber door, and the chamber door includes a door panel and the door panel. Door covers on both sides, the door covers are fixedly connected to the door frame leading to the compression chamber, the door panel is nested between the two door covers and can slide up and down along the door covers to achieve all The opening and closing of the pressing room is described. The electromagnetically heated PCB board multi-cavity laminator according to item 9 of the scope of patent application, wherein the door cover includes a door cover body and a U-shaped groove portion formed in the door cover body, and the U The groove portion extends along the height direction of the door cover body; at least one bearing is provided on both sides of the door panel, and the bearing is engaged with the U-shaped groove portion; the U-shaped groove portion is provided with two The end portions are respectively an inner end portion close to the compression chamber door frame and an outer end portion remote from the compression chamber door frame, and the width of the outer end portion is greater than the width of the inner end portion.