A vacuum quick press and hot pressing process

Abstract

The present invention discloses a vacuum quick press and hot pressing process, including a quick press body, an upper pressing plate and a bottom plate assembly. A workbench is provided on the quick press body, the bottom plate assembly is fixedly mounted on the workbench, one end of the upper pressing plate is hinged to the bottom plate assembly by a hinge, and the upper pressing plate covers the bottom plate assembly; a notch is provided on one side of the bottom plate assembly along a preset first direction, a positioning assembly is provided in the notch along its length, the positioning assembly includes a plurality of positioning blocks arranged at intervals, and an accommodating space for accommodating a connector is formed between two adjacent positioning blocks. The accommodating space plays a role in protecting the connector and preventing the connector from being damaged by pressure; the vacuum quick press can perform hot pressing on an FPC board welded with a connector, avoiding secondary welding and heating of the NTC thermistor, ensuring the stability of the product, and improving the qualified rate.

Description

Technical Field

[0001] The present invention relates to the field of hot pressing machines, and in particular to a vacuum quick pressing machine and a hot pressing process. Background Art

[0002] When producing and processing circuit boards, the equipment for pressing them is generally a vacuum fast pressing machine. The upper pressing plate of the vacuum fast pressing machine directly presses the circuit board products. Its characteristics are that it can press both the flexible circuit board cover film and the rigid circuit board.

[0003] Before the vacuum fast pressing machine in the existing technology presses the circuit board, it is necessary to first weld the NTC thermistor to the FPC board, and then put it into the pressing cavity for hot pressing. After the hot pressing is completed, the FPC board is welded to the connector (second welding). This is because the connector is relatively thick, and there will be protrusions during pressing, resulting in poor pressing effect. Therefore, it is necessary to complete the hot pressing of the FPC board before welding the connector. However, the problem with this processing technology is that the NTC thermistor will be welded for the second time, causing it to generate thermal stress, causing the NTC thermistor to melt tin, affecting the product qualification rate.

[0004] In view of this, it is necessary to improve the fast pressing machine in the prior art to solve the technical problem that the NTC thermistor will be welded twice and tin will melt. Summary of the Invention

[0005] The purpose of the present invention is to provide a vacuum quick pressing machine and a hot pressing process to solve the above technical problems.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The present invention provides a vacuum quick press, comprising a quick press body, an upper pressing plate and a bottom plate assembly, wherein a workbench is provided on the quick press body, the bottom plate assembly is fixedly mounted on the workbench, and one end of the upper pressing plate is hinged to the bottom plate assembly via a hinge;

[0008] A notch is provided on one side of the base plate assembly. A positioning assembly is provided in the notch along its length. The positioning assembly includes a plurality of positioning blocks arranged at intervals. An accommodating space for accommodating a connector is formed between two adjacent positioning blocks.

[0009] Optionally, the positioning assembly further includes a mounting plate, the mounting plate being provided with a plurality of positioning grooves spaced apart along its length, and one end portion of the positioning block being snap-fitted and connected in the positioning groove.

[0010] Optionally, the bottom wall of the notch is provided with a plurality of positioning hole groups, wherein the positioning hole groups include a plurality of positioning holes sequentially arranged along a preset first direction; the preset first direction is a direction perpendicular to the length direction of the notch;

[0011] A positioning pin is inserted into the positioning hole, and the positioning pin is used to limit the positioning block.

[0012] Optionally, the positioning hole is a threaded hole; the lower end of the positioning pin is provided with a threaded section, and the threaded section is threadedly connected to the threaded hole.

[0013] Optionally, a snap-fit ​​groove is provided at the lower end of the positioning pin;

[0014] An elastic buckle portion that matches the clamping groove is provided at a preset position in the positioning hole, and the positioning pin is inserted into the positioning hole so that the elastic buckle portion is clamped and connected to the clamping groove.

[0015] Optionally, a limiting boss is further provided at the lower end of the positioning pin, and the limiting boss abuts against the bottom wall of the notch groove.

[0016] Optionally, a heat insulation plate is provided on the notch groove to cover the notch, and the lower end surface of the heat insulation plate abuts against the upper end surface of the positioning block;

[0017] Wherein, the width of the heat insulation board is smaller than the width of the notch groove.

[0018] Optionally, the upper pressure plate includes an upper pressure plate body and an airbag, the upper pressure plate body is provided with a mounting groove, the airbag is installed in the mounting groove, and the airbag is used to abut against the base plate assembly.

[0019] The present invention also provides a hot pressing process, which is used in the vacuum quick pressing machine as described above, comprising:

[0020] Soldering the NTC thermistor and the connector to the FPC board in sequence to form a circuit board embryo, wherein the circuit board embryo includes a main body and a connector end;

[0021] Placing the circuit board blank on the base plate assembly so that the connector end of the circuit board blank is placed in the accommodating space and the main body of the circuit board blank is attached to the base plate assembly;

[0022] The upper pressing plate is covered on the bottom plate assembly, and the vacuum quick pressing machine is operated to hot-press the main body of the circuit board embryo to form a hot-pressed circuit board finished product.

[0023] Optionally, the vacuum press includes a heat insulation board; and the step of placing the circuit board blank on a base plate assembly so that the connector end of the circuit board blank is placed in the accommodating space, and after the main body of the circuit board blank is attached to the base plate assembly, further includes:

[0024] The heat insulation plate is covered on the notch groove so that the heat insulation plate abuts against the upper end surface of the positioning block.

[0025] Compared with the prior art, the present invention has the following beneficial effects: during processing, the NTC thermistor and the connector are first welded to the FPC board in sequence, and then several welded FPC board blanks are placed on the base plate assembly, so that the connector end of the FPC board is placed in the accommodating space, and the main body of the FPC board is attached to the base plate assembly. The accommodating space plays a role in protecting the connector and preventing the connector from being damaged by pressure; compared with the hot pressing equipment in the prior art, the vacuum fast pressing machine can hot press the FPC board with the connector welded, avoiding the secondary welding heating of the NTC thermistor, ensuring the stability of the product, and improving the qualified rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] The structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not intended to limit the conditions under which the present invention can be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportional relationships, or adjustments in size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and objectives that can be achieved by the present invention.

[0028] Figure 1 This is a schematic diagram of the overall structure of the vacuum quick press.

[0029] Figure 2 For this vacuum quick press Figure 1 Schematic diagram of the locally enlarged structure at point A in the middle.

[0030] Figure 3 This is a structural diagram of one embodiment of the positioning assembly of the vacuum quick press.

[0031] Figure 4 This is a structural diagram of the second implementation method of the positioning component of the vacuum quick press.

[0032] Figure 5 This is a structural diagram of the connection between the positioning pin and the positioning hole of this vacuum quick press.

[0033] Figure 6 For this vacuum quick press Figure 5 Schematic diagram of the local enlarged structure at point B in the middle.

[0034] Figure 7 This is a schematic diagram of the top view of the positioning assembly covering the insulation board of this vacuum quick press.

[0035] Illustration: quick press body 1, upper pressing plate 2, bottom plate assembly 3, notch groove 31, positioning assembly 4, positioning block 41, accommodating space 42, mounting plate 43, positioning groove 44, positioning hole group 45, positioning hole 451, positioning pin 46, snap-fit ​​groove 461, elastic snap portion 452, limiting boss 462, and heat insulation board 5. DETAILED DESCRIPTION

[0036] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally located component.

[0038] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0039] Example 1:

[0040] The embodiment of the present invention provides a vacuum quick press, comprising a quick press body 1, an upper pressing plate 2, and a bottom plate assembly 3. The quick press body 1 is provided with a workbench, the bottom plate assembly 3 is fixedly mounted on the workbench, and one end of the upper pressing plate 2 is hinged to the bottom plate assembly 3 via a hinge, so that the upper pressing plate 2 can cover the bottom plate assembly 3.

[0041] A notch 31 is provided on one side of the base plate assembly 3 , and a positioning assembly 4 is provided in the notch 31 along its length. The positioning assembly 4 includes a plurality of positioning blocks 41 arranged at intervals, and an accommodating space 42 for accommodating a connector is formed between two adjacent positioning blocks 41 .

[0042] It should be understood that the positioning blocks 41 are used to separate several FPC boards, which plays a role of positioning and isolation, and avoids adjacent FPC boards from being squeezed and stacked. Multiple FPC boards can be processed at the same time, thereby improving work efficiency.

[0043] The working principle of the present invention is as follows: during processing, the NTC thermistor and the connector are first welded to the FPC board in sequence, and then several welded FPC board blanks are placed on the base plate assembly 3, so that the connector end of the FPC board is placed in the accommodating space 42, and the main body of the FPC board is attached to the base plate assembly 3. The accommodating space 42 plays a role in protecting the connector and preventing the connector from being damaged by pressure; compared with the hot pressing equipment in the prior art, the vacuum fast pressing machine can hot press the FPC board with the connector welded, avoiding the secondary welding heating of the NTC thermistor, ensuring the stability of the product, and improving the qualified rate.

[0044] It should be noted that the positioning component 4 in this solution has multiple settings, combined with Figure 3 and Figure 4 As shown, two implementations of the positioning assembly 4 are provided respectively;

[0045] In one embodiment of the positioning assembly 4, the positioning assembly 4 further includes a mounting plate 43, which is mounted in the notch 31. The mounting plate 43 has a plurality of positioning slots 44 spaced apart along its length, and one end of the positioning block 41 is engaged with the positioning slot 44. The width of the positioning slot 44 is set to be equal to the width of the positioning block 41, thereby facilitating the installation of the positioning block 41.

[0046] In order to facilitate the fixation of the mounting plate 43 , a groove body is reserved on one side of the bottom of the notch groove 31 , and the bottom of the mounting plate 43 is installed in the groove body.

[0047] In the second embodiment of the positioning assembly 4, a plurality of positioning hole groups 45 are formed on the bottom wall of the notch 31. The positioning hole groups 45 include a plurality of positioning holes 451 arranged in sequence along a predetermined first direction; the predetermined first direction is a direction perpendicular to the length direction of the notch 31.

[0048] A positioning pin 46 is inserted into the positioning hole 451 , and the positioning pin 46 is used to limit the positioning block 41 .

[0049] It should be noted that one positioning block 41 is provided with two rows of positioning hole groups 45, which respectively conflict with the front and rear end surfaces of the positioning block 41 to limit the positioning block 41; and at the same time, multiple groups of positioning holes 451 are provided to facilitate the adjustment of the distance between two adjacent positioning blocks 41, thereby adapting to the production of PCB boards of different sizes.

[0050] In conjunction with the limiting method of the positioning hole 451, there are many ways to connect the positioning pin 46 with the positioning hole 451, among which: Figure 5 and Figure 6 Two fixing methods of the positioning pin 46 are provided;

[0051] Optionally, as one method of securing the positioning pin 46, the positioning hole 451 is a threaded hole; a threaded section is provided at the lower end of the positioning pin 46, and the threaded section is threadedly connected to the threaded hole. During operation, the positioning pin 46 can be removed or installed by twisting the positioning pin 46, and the connection is secure.

[0052] Optionally, as a second fixing method of the positioning pin 46, a snap-fit ​​groove 461 is provided at the lower end of the positioning pin 46;

[0053] An elastic buckle portion 452 that cooperates with the engaging groove 461 is provided at a preset position in the positioning hole 451 . The positioning pin 46 is inserted into the positioning hole 451 so that the elastic buckle portion 452 is engaged and connected in the engaging groove 461 .

[0054] During operation, the positioning pin 46 is connected to or removed from the base plate assembly 3 by plugging and unplugging the positioning pin 46 , which is convenient and fast and easy to operate.

[0055] To further illustrate, the lower end of the positioning pin 46 is further provided with a limiting boss 462, which abuts against the bottom wall of the notch 31. The purpose of providing the limiting boss 462 is to limit the insertion depth of the positioning pin 46, while increasing the contact area between the positioning pin 46 and the bottom wall of the notch 31, thereby increasing the stability of the connection.

[0056] As a preferred solution of this embodiment, a heat insulation plate 5 is provided on the notch 31 to cover the notch 31 , and the lower end surface of the heat insulation plate 5 abuts against the upper end surface of the positioning block 41 ; wherein the width of the heat insulation plate 5 is smaller than the width of the notch 31 .

[0057] The heat insulation board 5 is set on the top of the accommodating space 42 to play a role of heat insulation; when the hot pressing is working, the base plate assembly 3 will be heated. In order to prevent the heat of the base plate assembly 3 from being transferred to the accommodating space 42, the stability of the connector is protected and the product qualification rate is improved.

[0058] In this embodiment, the upper pressing plate 2 includes an upper pressing plate body and an airbag. A mounting groove is provided in the upper pressing plate body. The airbag is installed in the mounting groove. The airbag is used to abut against the bottom plate assembly 3 .

[0059] During operation, the airbag is inflated with air, and the upper pressing plate 2 is covered on the bottom plate assembly 3. The airbag fits against the upper end surface of the bottom plate assembly 3, squeezing out the air between them, so that the FPC board is flattened and heated evenly.

[0060] Example 2:

[0061] The present invention also provides a hot pressing process, which is used in the vacuum quick pressing machine as described above, comprising:

[0062] Solder the NTC thermistor and connector to the FPC board in sequence to form a rough version of the circuit board;

[0063] Placing the circuit board blank on the base plate assembly so that the connector end of the circuit board blank is placed in the accommodating space and the main body of the circuit board blank is attached to the base plate assembly;

[0064] The upper pressing plate is covered on the bottom plate assembly, and the vacuum quick pressing machine is operated to hot-press the main body of the circuit board embryo to form a hot-pressed circuit board finished product.

[0065] Working Description: The accommodating space protects the connector from damage due to pressure. This hot pressing process first welds the connector and then the NTC thermistor, so that the NTC thermistor is only heated once, avoiding secondary welding heating of the NTC thermistor, ensuring product stability and improving the qualified rate.

[0066] In this embodiment, the vacuum press includes a heat insulation plate. The step of placing the circuit board blank on the base plate assembly so that the connector end of the circuit board blank is placed in the accommodating space, and after the main body of the circuit board blank is attached to the base plate assembly, further includes:

[0067] The heat insulation plate is covered on the notch groove so that the heat insulation plate abuts against the upper end surface of the positioning block.

[0068] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vacuum quick press, comprising a quick press body (1), an upper pressing plate (2) and a bottom plate assembly (3), wherein a workbench is provided on the quick press body (1), the bottom plate assembly (3) is fixedly mounted on the workbench, and one end of the upper pressing plate (2) is hinged to the bottom plate assembly (3) via a hinge; ； A notch groove (31) is provided on one side of the base plate assembly (3), a positioning assembly (4) is provided in the notch groove (31) along its length direction, the positioning assembly (4) comprises a plurality of positioning blocks (41) arranged at intervals, and an accommodating space (42) for accommodating a connector is formed between two adjacent positioning blocks (41); The positioning assembly (4) further includes a mounting plate (43), the mounting plate (43) being mounted in the notch groove (31), the mounting plate (43) being provided with a plurality of positioning grooves (44) spaced apart along its length direction, and one end of the positioning block (41) being snap-fitted and connected in the positioning groove (44); The bottom wall of the notch groove (31) is provided with a plurality of positioning hole groups (45), and the positioning hole groups (45) include a plurality of positioning holes (451) arranged in sequence along a preset first direction; the preset first direction is a direction perpendicular to the length direction of the notch groove (31); A positioning pin (46) is inserted into the positioning hole (451), and the positioning pin (46) is used to limit the positioning block (41); The lower end of the positioning pin (46) is provided with a snap-fitting groove (461); An elastic snap-fit ​​portion (452) that matches the snap-fit ​​groove (461) is provided at a preset position in the positioning hole (451), and the positioning pin (46) is inserted into the positioning hole (451) so that the elastic snap-fit ​​portion (452) is snap-fitted and connected to the snap-fit ​​groove (461).

2. The vacuum quick press according to claim 1, characterized in that: The positioning hole (451) is a threaded hole; the lower end of the positioning pin (46) is provided with a threaded section, and the threaded section is threadedly connected in the threaded hole.

3. The vacuum quick press according to claim 1, characterized in that: The lower end of the positioning pin (46) is further provided with a limiting boss (462), and the limiting boss (462) abuts against the bottom wall of the notch groove (31).

4. The vacuum quick press according to claim 1, characterized in that: A heat insulation plate (5) is provided on the notch groove (31) to cover the notch groove, and the lower end surface of the heat insulation plate (5) is in contact with the upper end surface of the positioning block (41); Wherein, the width of the heat insulation plate (5) is smaller than the width of the notch groove (31).

5. The vacuum quick press according to claim 1, characterized in that: The upper pressing plate (2) comprises an upper pressing plate body and an airbag. A mounting groove is provided in the upper pressing plate body. The airbag is mounted in the mounting groove. The airbag is used to abut against the bottom plate assembly (3).

6. A hot pressing process, characterized in that: The vacuum quick press according to any one of claims 1 to 5 comprises: Soldering the NTC thermistor and the connector to the FPC board in sequence to form a circuit board embryo, wherein the circuit board embryo includes a main body and a connector end; Placing the circuit board blank on the base plate assembly so that the connector end of the circuit board blank is placed in the accommodating space and the main body of the circuit board blank is attached to the base plate assembly; The upper pressing plate is covered on the bottom plate assembly, and the vacuum quick pressing machine is operated to hot-press the main body of the circuit board embryo to form a hot-pressed circuit board finished product.

7. The hot pressing process according to claim 6, characterized in that: The vacuum press includes a heat insulation board; the step of placing the circuit board blank on the base plate assembly so that the connector end of the circuit board blank is placed in the accommodating space, and after the main body of the circuit board blank is attached to the base plate assembly, further includes: The heat insulation plate is covered on the notch groove so that the heat insulation plate abuts against the upper end surface of the positioning block.

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