Vacuum pressing device with pressing and defoaming functions

Abstract

The utility model relates to the technical field of production equipment of flexible printed circuit boards, in particular to a vacuum pressing device with pressing and defoaming functions, which comprises a single-pressure upper template and a sealing assembly connected with a negative pressure device, the sealing assembly is arranged below the single-pressure upper template, and a surrounding cavity is formed between the sealing assembly and the single-pressure upper template. A plurality of pressing plates with pressing heads are arranged at the bottom of the single-pressure upper template; the bottom end face of the sealing assembly and the top end face of the lower die mechanism are pressed in a sealed mode, a pressing head on the pressing plate is correspondingly embedded in a material profiling groove of the lower die mechanism in a pressed mode, and vacuum bubble removing is synchronously conducted within the time of stopping pressing materials. According to the utility model, the sealing assembly is arranged in the upper die mechanism, and the sealing assembly comprises the non-deformable space enclosed by the long and short enclosing plates and the deformable space enclosed by the sealing rubber sleeve to jointly form the enclosed cavity for negative pressure vacuum, so that air in materials can be discharged under negative pressure, and the functions of pressing the materials and expelling bubbles are synchronously realized.

Description

Technical Field

[0001] The utility model relates to the technical field of production equipment for flexible printed circuit boards, in particular to a vacuum pressing device with pressing and defoaming functions. Background Art

[0002] Flexible printed circuit board (FPCB) is a highly reliable and flexible printed circuit board made of polyimide or polyester film as the substrate. It is referred to as soft board or FPCB and has the characteristics of high wiring density, light weight and thin thickness.

[0003] In the current production process for reinforcing sheets used in flexographic boards, adhesive lamination is typically performed before stamping. During the laminating process, the flexographic board is typically placed on a jig, where it is pressed together with the upper mold to securely bond the flexographic board to the adhesive backing. Single-piece flexographic boards are compact and lightweight. Multiple flexographic boards, with adhesive backing sheets applied, are then placed on a jig for pressing. However, pressing the entire board together quickly can result in uneven force or excessive speed, preventing air from escaping quickly and forming bubbles between the flexographic board and the adhesive backing, leading to poor adhesion.

[0004] Based on the problems in the prior art, the utility model provides a vacuum pressing device with pressing and defoaming functions. Utility Model Content

[0005] The utility model aims to provide a vacuum pressing device with pressing and defoaming functions, so as to solve the technical problem in the prior art that bubbles are generated during the pressing process, resulting in unsatisfactory pressing effects.

[0006] The technical solution of the utility model is: a vacuum pressing device with pressing and defoaming functions, including an upper mold mechanism and a lower mold mechanism, the upper mold mechanism includes a single pressing upper mold plate and a sealing component connected to a negative pressure device, the sealing component is arranged below the single pressing upper mold plate and forms an enclosed chamber between the single pressing upper mold plate, and a plurality of pressing plates with pressing heads are arranged at the bottom of the single pressing upper mold plate;

[0007] The bottom end face of the sealing assembly is sealed and pressed with the top end face of the lower die mechanism, and the pressure head on the pressing plate is correspondingly embedded in the material profiling groove of the lower die mechanism. During the pause time of pressing the material, negative pressure vacuum degassing is performed synchronously.

[0008] Preferably, the sealing assembly comprises a set of oppositely arranged sealing fixed plates and encapsulation frame plates, a first sealing cavity is formed by surrounding the sealing fixed plates and the encapsulation frame plates through a ring of sealing rubber sleeves, the encapsulation frame plates are installed below the sealing fixed plates through guide shafts; the sealing fixed plates are parallel and spaced apart from the single-press upper die plate, the two are connected and sealed by a pair of long surrounding plates and a pair of short surrounding plates to form a second sealing cavity, the first sealing cavity and the second sealing cavity are communicated and combined to form the surrounding chamber.

[0009] Preferably, the pressing plate is arranged in the surrounding space of the encapsulation frame plate, a pressure control assembly is arranged on the top of the pressing plate, the pressure control assembly comprises a pressing rod, a base and a support frame, the base is fixedly installed on the pressing plate through a stroke plate, and the support frame is slidably connected with the base through a linear slide rail; the stroke plate is provided with an assembly hole for mounting and moving the pressing rod, when the pressing plate is forced to move upward during pressing the material, the pressing rod abuts against the bottom wall of the stroke plate, and the pressure sensor detects the pressure of the material through the pressing rod.

[0010] Preferably, the lower die mechanism comprises a lower die plate and a carrier plate, and the material profiling grooves are arranged on the lower die plate and the carrier plate respectively; a sealing rubber ring is arranged on the lower die plate, and the sealing rubber ring protrudes from the surface of the lower die plate and abuts against the carrier plate.

[0011] Preferably, a lower die rubber head is arranged in the material profiling groove, the lower die rubber head is arranged at the bottom of the material and cooperates with the pressing head above to press the material, and a plurality of air holes are arranged on the lower die rubber head.

[0012] Preferably, a sampling end for connecting a negative pressure table and an air path end for connecting a negative pressure device are separately arranged on a pair of short surrounding plates.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] (1) The utility model discloses a sealing assembly arranged in the upper die mechanism, the sealing assembly comprises a non-deformable space surrounded by long and short surrounding plates and a deformable space surrounded by sealing rubber sleeves, and the two spaces jointly form a surrounding chamber for negative pressure vacuum, which can exhaust air in the material and simultaneously realize material pressing and bubble removal.

[0015] (2) The pressure head and pressure plate of the upper mold mechanism of the utility model are arranged in the surrounding chamber, and a pressure control component is arranged on the top of the pressure plate. The pressure control component includes a pressing rod and a stroke plate with a reserved distance from the pressing rod in standby mode, and a deformable space is surrounded by a sealing rubber sleeve. Under the action of pressure, the sealing rubber sleeve is deformed and compressed, and the pressure plate presses the material and moves upward under force. The pressing rod abuts against the bottom wall of the stroke plate, and the pressure remains constant. The pressure sensor transmits and detects the pressure currently applied to the material through the pressing rod, thereby keeping the pressure applied to the material by all pressure plates consistent, and can accurately adjust the overall pressure and the height of the pressure head to reduce errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a three-dimensional schematic diagram of the vacuum pressing device with pressing and defoaming functions according to the present invention;

[0018] Figure 2 This is a schematic diagram of the partial structure of the first sealing cavity formed by the sealing assembly of the present invention;

[0019] Figure 3 This is an exploded view of the vacuum pressing device with pressing and defoaming functions according to the present invention;

[0020] Figure 4 This is a schematic diagram of the three-dimensional structure of the pressure control assembly of the present invention;

[0021] Figure 5 It is a cross-sectional schematic diagram of the pressure control assembly of the present invention;

[0022] Figure 6 This is a structural diagram of the lower template of the utility model;

[0023] Figure 7 Schematic diagram of the press fit between the pressing plate and the carrier plate of the present invention;

[0024] Among them: 1. Sealing assembly; 2. Pressure control assembly; 3. Lower mold mechanism; 4. Press head; 5. Single press upper mold plate; 6. Press plate; 7. Sealing rubber ring; 8. Surrounding chamber; 9. Sampling end; 10. Gas line end;

[0025] 11. Sealing fixed plate; 12. Rubber-coated frame plate; 13. Sealing rubber sleeve; 14. Guide shaft; 15. Long enclosure plate; 16. Short enclosure plate;

[0026] 21. Pressing rod; 22. Base; 23. Support frame; 24. Linear guide rail; 25. Pressure sensor; 26. Travel plate;

[0027] 30, material profiling groove; 31, lower mold plate; 32, carrier plate; 33, lower mold rubber head; 330, air vent. DETAILED DESCRIPTION

[0028] The content of the present application will be further described in detail below in combination with specific embodiments:

[0029] In order to facilitate understanding, first, the application scenario of the present application is described, the flexible board (flexible circuit board, generally in sheet form) is usually fed to the jig, and the flexible board is firmly bonded with the back adhesive by up-down and mold pressing. However, directly pressing the whole mold plate quickly, uneven force or too fast speed, air cannot be discharged in time, all of which will form air bubbles between the flexible board and the back adhesive, resulting in poor bonding effect of the flexible board and the back adhesive.

[0030] As shown in Figure 1 , the present application provides a vacuum pressing device with pressing and bubble removing functions, comprising an upper mold mechanism and a lower mold mechanism 3, the upper mold mechanism moves downward and cooperates with the lower mold mechanism 3 to extrude the material, so that the material is firmly bonded.

[0031] The upper mold mechanism comprises a single-pressing upper mold plate 5, a plurality of pressing plates 6 are arranged below the single-pressing upper mold plate 5, and a pressing head 4 made of silica gel is installed at the bottom of the pressing plate 6 for pressing the material. The present application is mainly used to solve the problem of air bubbles generated in the product during the pressing process.

[0032] As shown in the accompanying Figure 3 , the single-pressing upper mold plate 5 serves as a top cover, and the bottom is connected with a sealing assembly 1, which surrounds a "mouth" shaped space and forms a surrounding chamber 8 with the single-pressing upper mold plate 5 at the top. A set of oppositely arranged sealing fixed plates 11 and a rubber coating frame plate 12 are arranged inside the surrounding chamber 8, the rubber coating frame plate 12 is installed below the sealing fixed plate 11 through a guide shaft 14, and a first sealing cavity is formed between the sealing fixed plate 11 and the rubber coating frame plate 12 by a ring of sealing rubber sleeve 13; the sealing fixed plate 11 and the single-pressing upper mold plate 5 are parallel and oppositely spaced, and the two are connected and sealed by a pair of long surrounding plates 15 and a pair of short surrounding plates 16 to form a second sealing cavity, and the first sealing cavity and the second sealing cavity are connected and combined to form the surrounding chamber 8.

[0033] Referring to the accompanying Figure 2 , the gas path end 10 is arranged on the right side short surrounding plate 16 surrounding the first sealing cavity, which is used to connect a negative pressure device to form a vacuum negative pressure environment in the surrounding chamber 8. The sampling end 9 is arranged on the left side short surrounding plate 16 surrounding the first sealing cavity, which is used to connect a negative pressure table to check the state of chasing air bubbles in the negative pressure vacuum environment.

[0034] As shown in the accompanying Figure 6As shown, the lower mold mechanism 3 includes a lower mold plate 31 and a carrier plate 32. A material profiling groove 30 is provided on the lower mold plate 31 and the carrier plate 32 respectively. A lower mold rubber head 33 is placed in the material profiling groove 30, and the lower mold rubber head 33 is padded at the bottom of the material; when pressing, the lower mold rubber head 33 cooperates with the upper pressing head 4 to press the material, and a plurality of air holes 330 are provided on the lower mold rubber head 33 to facilitate the rapid discharge of air and eliminate bubbles.

[0035] A sealing rubber ring 7 is provided on the lower template 31. The sealing rubber ring 7 is higher than the plane of the lower template 31. When pressed together, the sealing rubber ring 7 abuts against the carrier 32 to ensure the sealing between the carrier 32 and the lower template 31. The bottom end surface of the rubber-coated frame plate 12 is a circle of silicone ring, which is sealed and pressed together with the surface of the carrier 32. Figure 7 The pressure head 4 protrudes from the surface of the pressing plate 6. When performing the pressing operation, the bubbles in the patch are first extracted by vacuum, the air is compressed, and then the top rubber-wrapped frame plate 12 is first sealed and pressed with the bottom carrier plate 32. The pressure head 4 is correspondingly embedded in the material profiling groove 30 of the lower mold mechanism, and the pressing is paused to achieve the bubble-driving function when performing the pressing operation.

[0036] The pressing plate 6 is arranged in the surrounding space of the rubber-wrapped frame plate 12, as shown in the attached Figure 4 As shown, a pressure control assembly 2 is provided on top of the pressing plate 6. The pressure control assembly 2 includes a pressing rod 21, a base 22, and a support frame 23. The base 22 is fixedly mounted on the pressing plate 6 via a stroke plate 26. The support frame and the base 22 are slidably connected via a linear slide 24. A pressure sensor 25 is provided on the top of the pressing rod 21 and is fixedly connected to the support frame 23 via the pressure sensor 25. The top of the support frame 23 is fixedly connected to the single press upper mold plate 5.

[0037] The pressing rod 21 adopts a rigid screw rod or guide shaft, and a spring can be installed around the screw rod or guide shaft to achieve the function of shock absorption and stability. The bottom part of the pressing rod 21 is installed in the assembly hole of the stroke plate 26, and a distance is reserved from the bottom plane of the assembly hole. When pressing the material, the top upper mold mechanism moves downward as a whole, and the sealing fixed plate 11 is in sealing contact with the carrier plate 32. Under the action of pressure, the sealing rubber sleeve 13 is deformed and compressed, and after the rubber-coated frame plate 12 is flush with the pressing plate 6, the pressing plate 6 moves upward, so that the gap between the pressing rod 21 and the assembly hole becomes smaller and smaller until it abuts. Refer to the attached Figure 5 A gap is reserved between the bottom end surface of the pressing rod 21 and the top end surface of the pressing plate 6 to allow the pressing plate 6 to move upward when pressing the material. The pressure sensor 25 transmits and detects the current pressure applied to the material through the pressing rod 21. The pressure of the pressed material does not change. The pressure sensor transmits and detects the current pressure applied to the material through the pressing rod. This ensures that the pressure of all pressing plates 6 is consistent, and the overall pressure and the height of the pressure head 4 can be precisely adjusted to reduce errors.

[0038] In addition, during the specific implementation, a brass heating plate can be installed on the upper and lower mold mechanisms. The brass heating plate integrates heating tubes, thermocouples, heating circuits and other components. The heating tube is connected to the power supply through the power supply line to heat the brass plate. The thermocouple is used to detect the heating temperature so that the heating temperature can be controlled within an appropriate temperature range. Through heat conduction, the pressing plate 6, the pressing head 4, the lower template 31 and the lower mold rubber head 33 are heated to achieve hot pressing.

[0039] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and they are not intended to limit the scope of protection of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A vacuum pressing device with pressing and defoaming functions, characterized in that: It includes an upper mold mechanism and a lower mold mechanism, wherein the upper mold mechanism includes a single upper mold plate and a sealing assembly connected to a negative pressure device, wherein the sealing assembly is arranged below the single upper mold plate and forms an enclosed chamber between the single upper mold plate and the single upper mold plate, and a plurality of pressing plates with pressing heads are arranged at the bottom of the single upper mold plate; The bottom end face of the sealing assembly is sealed and pressed with the top end face of the lower die mechanism, and the pressure head on the pressing plate is correspondingly embedded in the material profiling groove of the lower die mechanism. During the pause time of pressing the material, negative pressure vacuum degassing is performed synchronously.

2. The vacuum pressing device with pressing and defoaming functions according to claim 1, characterized in that: The sealing assembly includes a set of relatively arranged sealing fixing plates and a rubber-coated frame plate, wherein a circle of sealing rubber sleeve is formed between the sealing fixing plates and the rubber-coated frame plate to form a first sealing cavity, and the rubber-coated frame plate is installed below the sealing fixing plates through a guide shaft; The sealing fixing plate is parallel to and spaced apart from the single pressing upper template, and the two are connected by a pair of long surrounding plates and a pair of short surrounding plates and seal to form a second sealed cavity. The first sealed cavity and the second sealed cavity are connected and combined to form the enclosed chamber.

3. The vacuum pressing device with pressing and defoaming functions according to claim 2, characterized in that: The pressing plate is arranged in the enclosed space of the rubber-coated frame plate, and a pressure control assembly is arranged on the top of the pressing plate. The pressure control assembly includes a pressing rod, a base and a support frame. The base is fixedly mounted on the pressing plate through a stroke plate, and the support frame and the base are slidably connected through a linear slide rail. A pressure sensor is provided on the top of the pressing rod and is fixedly connected to the support frame through the pressure sensor, and the top of the support frame is fixedly connected to the single pressing upper template; The stroke plate is provided with an assembly hole for the installation and movement of the pressing rod. The sealing rubber sleeve is deformed and compressed under force, the pressure plate presses the material and moves upward under force, the pressing rod abuts against the bottom wall of the stroke plate, and the pressure is kept constant. The pressure sensor transmits and detects the current pressure on the material through the pressing rod.

4. The vacuum pressing device with pressing and defoaming functions according to claim 1, characterized in that: The lower mold mechanism includes a lower mold plate and a carrier plate, and the material profiling grooves are respectively provided on the lower mold plate and the carrier plate; a sealing rubber ring is provided on the lower mold plate, and the sealing rubber ring protrudes from the surface of the lower mold plate and abuts against the carrier plate.

5. The vacuum pressing device with pressing and defoaming functions according to claim 4, characterized in that: A lower die rubber head is placed in the material profiling groove, the lower die rubber head is padded at the bottom of the material, and cooperates with the upper pressing head to press the material, and a plurality of air holes are provided on the lower die rubber head.

6. The vacuum pressing device with pressing and defoaming functions according to claim 2, characterized in that: A sampling end for connecting to a negative pressure gauge and an air path end for connecting to a negative pressure device are separately arranged on a pair of the short enclosure plates.

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