Vacuum thermocompression bonding jig and vacuum thermocompression bonding equipment

Abstract

The utility model relates to the technical field of circuit board production equipment, and discloses a vacuum hot pressing jig and equipment, and the jig comprises an upper heating plate, an air bag plate, a jig plate and a lower heating plate which are arranged from top to bottom. Heating devices are arranged in the upper heating plate and the lower heating plate, an air bag is arranged on the lower surface of the air bag plate, a cooling channel used for connecting a cooling medium is arranged at part of the position, an air path used for inflating and deflating the air bag is arranged in the air bag plate, and an outlet of the air path is formed in the side face of the air bag plate. The jig plate is used for bearing a to-be-hot-pressed product, and a cooling channel matched with the cooling channel in the air bag plate in position is arranged in the jig plate. The upper heating plate and the lower heating plate are each provided with a heat insulation structure, the heat insulation structures divide the upper heating plate and the lower heating plate into a cooling area and a heating area, and the cooling areas are correspondingly arranged above or below the cooling channels respectively. According to the jig, cold and hot connection can be avoided, so that oxidation, bubbling or wrinkling of products are avoided.

Description

Technical Field

[0001] The utility model relates to the field of circuit board production equipment, in particular to a vacuum hot pressing fixture and equipment. Background Art

[0002] Flexible printed circuit boards, also known as FPC circuit boards, need to cover a protective film on the surface of the circuit board during the production process to play roles such as structural reinforcement and preventing oxidation of pad circuits. Since hot pressing is more firm than cold pressing, the vacuum hot pressing process is increasingly widely used in the production and manufacturing process of FPC circuit boards. In the existing vacuum hot pressing equipment, the cooling process mostly uses independent cooling plates, and there are gaps between the cooling plates, the airbag plates and the fixture plates. During the hot pressing process, there will be hot and cold handover phenomena at these gaps and at the junctions of the cooling area and the heating area, resulting in poor conditions such as oxidation, blistering or wrinkling in these areas. Therefore, it is necessary to design a new vacuum hot pressing fixture to solve the problem of hot and cold handover. Content of the Utility Model

[0003] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a vacuum hot pressing fixture, which can isolate the temperature between the cooling area and the heating area, avoid the occurrence of hot and cold handover areas, and thus avoid poor conditions such as oxidation, blistering or wrinkling at the boundary between the cooling area and the heating area.

[0004] To solve the above problems, the technical solution adopted by the utility model is as follows: A vacuum hot pressing fixture includes: an upper heating plate with a heating device arranged inside; an airbag plate arranged below the upper heating plate, with airbags arranged on the lower surface, a cooling channel for accessing a cooling medium is arranged at a part of the airbag plate, an air path for inflating and deflating the airbag is arranged inside the airbag plate, and the outlet of the air path is arranged on the side surface of the airbag plate; a fixture plate arranged below the airbag plate for carrying the product to be hot pressed, with a cooling channel arranged inside that matches the position of the cooling channel in the airbag plate; a lower heating plate arranged below the fixture plate, with a heating device arranged inside; wherein the upper heating plate and the lower heating plate are both provided with heat insulation structures, and the heat insulation structures divide the upper heating plate and the lower heating plate into a cooling area and a heating area. The cooling area on the upper heating plate is arranged above the cooling channel in the upper heating plate, and the cooling area on the lower heating plate is arranged below the cooling channel in the lower heating plate.

[0005] Compared with the prior art, the beneficial effects of the present utility model are as follows: The cooling channels are arranged in the airbag plate and the jig plate, avoiding the embedding and connection of independent cooling plate components in the airbag plate or the jig plate, which may cause heat and cold transfer at the joints between the cooling plate and the airbag plate or the jig plate. At the same time, both the upper heating plate and the lower heating plate are divided into a cooling area and a heating area by a heat insulation structure. The cooling area is located above or below the cooling channel area in the airbag plate or the jig plate. The heat insulation structure can reduce the heat transfer efficiency between the cooling area and the heating area, thus avoiding heat and cold transfer at the joints between the cooling area and the heating area. The vacuum hot pressing jig of the embodiment of the present utility model can avoid heat and cold transfer, thereby avoiding bad conditions such as oxidation, blistering and wrinkling at the heat and cold transfer joints, and improving the quality of the product.

[0006] For the above-mentioned vacuum hot pressing jig, the heat insulation structure is a heat insulation groove.

[0007] For the above-mentioned vacuum hot pressing jig, an upper sealing lip is arranged on the lower surface of the airbag plate, the upper sealing lip is arranged outside the airbag, and a lower sealing lip matching with the upper sealing lip is arranged on the upper surface of the jig plate.

[0008] For the above-mentioned vacuum hot pressing jig, a positioning structure is arranged between the upper heating plate and the airbag plate, and a positioning structure is also arranged between the lower heating plate and the jig plate. The positioning structure is used to keep the relative positions in the horizontal direction between the upper heating plate and the airbag plate and between the lower heating plate and the jig plate unchanged during lifting.

[0009] For the above-mentioned vacuum hot pressing jig, the positioning structure includes positioning bosses arranged on the lower surface of the upper heating plate and the upper surface of the lower heating plate, and positioning grooves arranged on the upper surface of the airbag plate and the lower surface of the jig plate. The shape of the positioning boss fits the shape of the positioning groove.

[0010] For the above-mentioned vacuum hot pressing jig, the positioning boss is a trapezoidal boss, the positioning groove is a trapezoidal groove, and the width of the positioning boss gradually converges in the direction away from the upper heating plate or the lower heating plate.

[0011] A hot pressing device is characterized by including the above-mentioned vacuum hot pressing jig.

[0012] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Description of the Drawings

[0013] Figure 1 It is a side view of the vacuum hot pressing jig of the embodiment of the present utility model;

[0014] Figure 2Cross-sectional view of the vacuum hot pressing fixture according to an embodiment of the present utility model;

[0015] Figure 3 Bottom view of the upper heating plate according to an embodiment of the present utility model;

[0016] Figure 4 Top view of the lower heating plate according to an embodiment of the present utility model;

[0017] Figure 5 Bottom view of the airbag plate according to an embodiment of the present utility model;

[0018] Figure 6 Top view of the fixture plate according to an embodiment of the present utility model.

[0019] Explanation of the reference numerals in the drawings:

[0020] 100 Upper heating plate, 110 Heating device, 120 Heat insulation structure, 130 Positioning boss, 200 Airbag plate, 210 Airbag, 211 Air passage, 212 Airbag pressing plate, 220 Cooling channel, 230 Upper sealing lip, 240 Positioning groove, 300 Fixture plate, 310 Lower sealing lip, 400 Lower heating plate. Detailed implementation manners

[0021] The embodiments of the present utility model will be described in detail below. Referring to Figure 1 and Figure 2 , the embodiments of the present utility model provide a vacuum hot pressing fixture, which includes an upper heating plate 100, an airbag plate 200, a fixture plate 300, and a lower heating plate 400 arranged from top to bottom. Among them, heating devices 110 are arranged in both the upper heating plate 100 and the lower heating plate 400. An airbag 210 is arranged on the lower surface of the airbag plate 200, and cooling channels 220 for accessing a cooling medium are arranged at some positions, and cooling media such as cooling water or liquid nitrogen can be accessed to cool the cooling areas on the product that do not need to be heated. An air passage 211 for inflating and deflating the airbag 210 is arranged inside the airbag plate 200, and the outlet of the air passage 211 is arranged on the side surface of the airbag plate 200. The fixture plate 300 is used to carry the product to be hot pressed, and cooling channels 220 are also correspondingly arranged on the fixture plate 300 at positions corresponding to the cooling channels 220 on the airbag plate 200. Heat insulation structures 120 are arranged on both the upper heating plate 100 and the lower heating plate 400. The heat insulation structures 120 divide the upper heating plate 100 and the lower heating plate 400 into a cooling area and a heating area. The cooling area of the upper heating plate 100 is arranged above the cooling channels 220 in the airbag plate 200, and the cooling area of the lower heating plate 400 is arranged below the cooling channels 220 in the fixture plate 300.

[0022] In the vacuum hot pressing fixture according to the embodiment of the present utility model, since the cooling channels 220 are directly arranged in the airbag plate 200 and the fixture plate 300, it is avoided that separate independent cooling plate components are installed on the airbag plate 200 and the fixture plate 300 for cooling the product, resulting in the occurrence of heat and cold transfer at the gaps between the cooling plate and the airbag plate 200 or the fixture plate 300. At the same time, heat insulation structures 120 are arranged on both the upper heating plate 100 and the lower heating plate 400 to isolate the temperature between the cooling areas above or below the cooling channels 220 in the upper heating plate 100 and the lower heating plate 400 and the surrounding heating areas, avoiding heat and cold transfer at the junction between the cooling area and the heating area. This vacuum hot pressing fixture can avoid heat and cold transfer, thereby avoiding oxidation, blistering and wrinkling of the product caused by heat and cold transfer, and improving the yield of the product.

[0023] It can be understood that the distribution position and distribution area of the cooling channels 220 need to be set according to the process requirements of the product, and are generally arranged near the inlet or outlet of the airbag plate 200 and the fixture plate 300. Refer to Figure 1 and Figure 2 , in this embodiment, the cooling channels 220 are arranged at the inlets of the airbag plate 200 and the fixture plate 300. The heat insulation structure 120 can be a through groove arranged on the upper heating plate 100 and the lower heating plate 400, and the heat is isolated by the gas in the through groove; or it is made of heat insulation materials such as asbestos or glass fiber and is embedded in the upper heating plate 100 and the lower heating plate 400. Refer to Figures 1 to 4 , in this embodiment, the heat insulation structure 120 is a heat insulation groove, and the heat insulation groove is arranged in the width direction of the heating plate or the lower heating plate 400, and the width of the heat insulation groove is slightly narrower than the width of the upper heating plate 100 or the lower heating plate 400. It can be understood that the heating device 110 can be an electric heating wire or an electric heating tube. In order to ensure the uniformity of heating the product during pressing, in this embodiment, refer to the figure, the electric heating tubes are evenly distributed inside the upper heating plate 100 and the lower heating plate 400.

[0024] Refer to Figure 2 , Figure 5 and Figure 6, in this embodiment, the edge of the airbag 210 is pressed against the lower surface of the airbag plate 200 by the airbag pressing plate 212. An upper sealing lip 230 is provided outside the airbag 210. Correspondingly, a lower sealing lip 310 is provided on the upper surface of the jig plate 300. During pressing, the upper sealing lip 230 and the lower sealing lip 310 will fit together, forming a cavity that encloses the product between the airbag plate 200 and the jig plate 300. Subsequently, the airbag 210 is inflated, causing the airbag 210 to expand to expel the air in the cavity, so that the cavity has a relatively high vacuum degree. The upper sealing lip 230 and the lower sealing lip 310 should be made of deformable flexible materials to ensure that there is sufficient pressure between the upper sealing lip 230 and the lower sealing lip 310 after fitting to ensure the sealing of the cavity after the gas is discharged.

[0025] Referring to Figures 1 to 4 , in some embodiments, in order to ensure that during the lifting process of the upper heating plate 100, the airbag plate 200, the jig plate 300, and the lower heating plate 400, their relative positions do not change in the horizontal direction, so as to avoid the upper sealing lip 230 and the lower sealing lip 310 being unable to fit precisely during hot pressing, or even directly pressing on the product, resulting in indentations on the product. Positioning structures are provided between the heating plate and the airbag plate 200, and between the jig plate 300 and the lower heating plate 400. The positioning structure can be the cooperation between a positioning pin and a positioning hole, or the cooperation between a positioning boss 130 and a positioning groove 240. In this embodiment, the positioning structure adopts the form of the cooperation between the positioning boss 130 and the positioning groove 240. The positioning boss 130 is provided on the lower surface of the upper heating plate 100 and the upper surface of the lower heating plate 400, and the positioning groove 240 is correspondingly provided on the upper surface of the airbag plate 200 and the lower surface of the jig plate 300. In order to guide the relative positions between the upper heating plate 100 and the airbag plate 200, and between the lower heating plate 400 and the jig plate 300 back to the normal position during each pressing process, the positioning boss 130 is a trapezoidal boss, and the corresponding positioning groove 240 is a trapezoidal groove. The width of the positioning boss 130 converges in the direction away from the upper heating plate 100 or the lower heating plate 400, and the relative positions between the upper heating plate 100 and the airbag plate 200, and between the lower heating plate 400 and the jig plate 300 are guided back to the normal position through the inclined surface of the trapezoidal boss.

[0026] The vacuum hot pressing equipment of the embodiment of the present utility model includes the above-mentioned vacuum hot pressing jig. The upper heating plate 100 and the airbag plate 200 are driven to press down by a downward pressing driving mechanism, and the lower heating plate 400 and the jig plate 300 are driven to lift by a jacking driving mechanism. During the pressing process, the upper heating plate 100 gradually fits with the airbag plate 200, and at the same time, the lower heating plate 400 gradually fits with the jig plate 300. The product is subjected to vacuum hot pressing through the airbag plate 200 and the jig plate 300. The vacuum hot pressing equipment of the embodiment of the present utility model can reduce the probability of oxidation, blistering, wrinkling and indentation of the product by adopting the above-mentioned vacuum hot pressing jig, improve the yield of the product, and thus reduce the production cost.

[0027] It should be noted that in the description of the present utility model, if there is any reference to the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., it is all based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and should not be construed as a limitation to the present utility model.

[0028] In the description of the present utility model, the meaning of "several" is one or more, and the meaning of "multiple" is two or more. Understandings such as "greater than", "less than", "exceeding" do not include the present number, and understandings such as "above", "below", "within" include the present number. If there is a description of "first" or "second", etc., it is only for the purpose of distinguishing technical features and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0029] In the description of the present utility model, unless otherwise clearly defined, words such as "set", "installed", "connected" should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0030] The above-mentioned implementation manners are only the preferred implementation manners of the present utility model and cannot be used to limit the protection scope of the present utility model. Any non-substantial changes and substitutions made by those skilled in the art on the basis of the present utility model belong to the protection scope required by the present utility model.

Claims

1. A vacuum hot pressing fixture, characterized in that, Comprising: An upper heating plate (100) with a heating device (110) arranged inside; An airbag plate (200) arranged below the upper heating plate (100), with airbags (210) arranged on the lower surface. A cooling channel (220) for accessing a cooling medium is arranged at a partial position of the airbag plate (200). An air path (211) for inflating and deflating the airbags (210) is arranged inside the airbag plate (200), and the outlet of the air path (211) is arranged on the side surface of the airbag plate (200); A jig plate (300) arranged below the airbag plate (200) for carrying the product to be hot-pressed, with a cooling channel (220) arranged inside that matches the position of the cooling channel (220) in the airbag plate (200); A lower heating plate (400) arranged below the jig plate (300), with a heating device (110) arranged inside; Wherein both the upper heating plate (100) and the lower heating plate (400) are provided with heat insulation structures (120). The heat insulation structures (120) divide the upper heating plate (100) and the lower heating plate (400) into a cooling area and a heating area. The cooling area on the upper heating plate (100) is arranged above the cooling channel (220) in the upper heating plate (100), and the cooling area on the lower heating plate (400) is arranged below the cooling channel (220) in the lower heating plate (400).

2. The vacuum hot pressing jig according to claim 1, wherein The heat insulation structure (120) is a heat insulation groove.

3. The vacuum hot pressing fixture according to claim 1, wherein, An upper sealing lip (230) is arranged on the lower surface of the airbag plate (200), and the upper sealing lip (230) is arranged outside the airbags (210). A lower sealing lip (310) that cooperates with the upper sealing lip (230) is arranged on the upper surface of the jig plate (300).

4. The vacuum hot pressing jig according to claim 1, characterized in that, A positioning structure is arranged between the upper heating plate (100) and the airbag plate (200), and a positioning structure is also arranged between the lower heating plate (400) and the jig plate (300). The positioning structure is used to keep the relative positions in the horizontal direction between the upper heating plate (100) and the airbag plate (200) and between the lower heating plate (400) and the jig plate (300) unchanged during lifting.

5. The vacuum hot pressing fixture according to claim 4, wherein The positioning structure includes positioning bosses (130) arranged on the lower surface of the upper heating plate (100) and the upper surface of the lower heating plate (400), and corresponding positioning grooves (240) arranged on the upper surface of the airbag plate (200) and the lower surface of the jig plate (300). The shape of the positioning boss (130) fits the shape of the positioning groove (240).

6. The vacuum hot pressing jig according to claim 5, wherein, The positioning boss (130) is a trapezoidal boss, the positioning groove (240) is a trapezoidal groove, and the width of the positioning boss (130) gradually converges in the direction away from the upper heating plate (100) or the lower heating plate (400).

7. A hot pressing device, characterized in that, Including the vacuum hot pressing jig according to any one of claims 1 to 6.

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