Hot pressing head device and hot press

Abstract

The utility model relates to a hot-pressing head device and a hot press, the hot-pressing head device is applied to the hot press for attaching anisotropic conductive adhesive film, the hot-pressing head device comprises a pressing head and a silica gel strip, the pressing head comprises a pressing head body and a mounting part, and the mounting part protrudes relative to the side surface of one side of the pressing head; the silica gel strip is provided with an installation cavity, and the installation cavity and the installation part are nested so that the silica gel strip and the pressing head can be fixed. The pressure head body is used for connecting and supporting the mounting part, and the mounting part is arranged to be capable of protruding relative to the side face of one side of the pressure head body so that the silica gel strip and the mounting part can be nested. The silica gel strip is provided with the mounting cavity, and the mounting cavity is nested with the mounting part of the pressure head, so that the silica gel strip and the pressure head are fixed into a whole, and when the printed circuit board and the flexible circuit board are subjected to hot-pressing bonding, the tightness degree of the silica gel sheet is kept consistent in the repeated feeding process, and the attaching stability of the ACF is relatively good.

Description

TECHNICAL FIELD

[0001] The utility model relates to hot press technical field especially relates to a hot head device and hot press. BACKGROUND

[0002] Anisotropic conductive film (English Anisotropic Conductive Film, abbreviated as ACF) attachment technology is a key link in the electronic manufacturing industry, especially in the production process of liquid crystal panel, touch screen, flexible circuit board and other fields. ACF attachment is mainly used to realize the electrical connection between fine-pitch electronic components, and also provides the function of mechanical connection.

[0003] Taking the soft and hard board combination welding process in the liquid crystal display module as an example, the ACF is accurately attached to the connecting terminal of the printed circuit board (English abbreviation: PCB) first, then the flexible circuit board (English abbreviation: FPC) is aligned and attached, and the ACF is compressed by a hot pressing device, so that the conductive particles in the ACF form an electrical connection between the upper and lower circuits. When attaching the ACF to the PCB, the ACF needs to be heated and pressurized. In order to ensure the uniformity of the ACF attachment pressure and temperature in the industry, a layer of silicone rubber skin is placed between the pressure head and the product as a buffer material.

[0004] When attaching the ACF to the PCB, repeated feeding is required. The conventional connection mode of the silicone rubber skin and the pressure head has differences in the tightness of the silicone rubber skin after each feeding, which causes poor ACF attachment stability. INVENTION CONTENTS

[0005] Therefore, it is necessary to provide a hot head device and a hot press to solve the technical problem of poor attachment stability caused by the difference in the tightness of the buffer in the related art.

[0006] A hot head device is applied to a hot press for anisotropic conductive film attachment, and the hot head device comprises:

[0007] A pressure head comprises a pressure head body and a mounting portion, and the mounting portion protrudes from one side surface of the pressure head;

[0008] A silicone rubber strip has a mounting cavity, and the mounting cavity is nested with the mounting portion to fix the silicone rubber strip with the pressure head.

[0009] In one embodiment, the mounting portion comprises:

[0010] A necked portion is fixedly connected with the pressure head body;

[0011] A protruding portion is connected to one end of the necked portion away from the pressure head body.

[0012] The cross-sectional width of the necked portion is smaller than the cross-sectional width of the protruding portion.

[0013] In one embodiment, the necked portion and the protruding portion are both cuboid structures.

[0014] The necked portion is recessed from the protruding portion at both ends in the length direction and the width direction.

[0015] In one embodiment, the mounting cavity comprises:

[0016] An expansion cavity adapted to the protruding portion;

[0017] A necked opening adapted to the necked portion;

[0018] The opening size of the necked opening is smaller than the size of the expansion cavity in the same direction as the opening.

[0019] The size of the expansion cavity is smaller than the size of the protruding portion, and the size of the necked opening is smaller than the size of the necked portion.

[0020] In one embodiment, the hot press head device further comprises:

[0021] A first limiting block detachably connected to one end of the press head body, the first limiting block pressing a part of the silica gel strip to limit the silica gel strip.

[0022] In one embodiment, the first limiting block comprises:

[0023] A first connecting portion detachably connected to the press head body, the first connecting portion pressing one end of the silica gel strip;

[0024] Two limiting strips fixedly connected to the end of the first connecting portion, the two limiting strips being spaced apart, and each limiting strip pressing the end of the silica gel strip away from the press head body.

[0025] In one embodiment, the hot press head device further comprises:

[0026] A second limiting block detachably connected to one end of the press head body away from the first limiting block, the second limiting block pressing a part of the silica gel strip to limit the silica gel strip.

[0027] In one embodiment, the second limiting block comprises:

[0028] A second connecting portion detachably connected to the press head body;

[0029] A pressing part is connected to the second connecting part, and an end of the pressing part presses an end of the silica gel strip away from the first limiting block.

[0030] In one embodiment, the hot pressing head device further comprises:

[0031] A heating block, the pressing head body is fixedly connected to the heating block;

[0032] Two heating pipes are spaced apart and connected to the heating block, one end of each of the two heating pipes is located in the heating block, the portions of the two heating pipes located in the heating block are electrically connected, the heating pipes can generate heat after being powered on, and exchange heat with the heating block to make the heating block generate heat.

[0033] A hot press, the hot press comprises the hot pressing head device as described above.

[0034] The hot pressing head device has the following beneficial effects:

[0035] The hot pressing head device is applied to the hot pressing of anisotropic conductive adhesive paste, the pressing head can generate heat, and is used for attaching the anisotropic conductive adhesive paste between a printed circuit board and a flexible circuit board. The pressing head body is used for connecting and supporting the mounting part, the mounting part is arranged in a form of protruding from one side surface of the pressing head body, so that the silica gel strip is nested with the mounting part. The mounting cavity is arranged on the silica gel strip, the mounting cavity is nested with the mounting part of the pressing head, the silica gel strip and the pressing head are fixed as a whole, and the tightness of the silica gel skin is consistent in the repeated feeding process when the printed circuit board and the flexible circuit board are hot pressed and bonded, so that the ACF attachment stability is good. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 A structure schematic view of the hot pressing head device provided by one embodiment of the present application is shown in the figure;

[0037] Figure 2 A structure schematic view of the hot pressing head device provided by one embodiment of the present application is shown in the figure;

[0038] Figure 3 A structure schematic view of the hot pressing head device provided by one embodiment of the present application is shown in the figure;

[0039] Figure 4 A structure schematic view of the hot pressing head device provided by one embodiment of the present application is shown in the figure;

[0040] Figure 5 A structure schematic view of the hot pressing head device provided by one embodiment of the present application is shown in the figure.

[0041] REFERENCE NUMERALS:

[0042] Press head 100; press head body 110; mounting portion 120; necked portion 121; protruding portion 122; silica gel strip 200; mounting cavity 210; necked opening 211; expanded cavity 212; first limiting block 300; first connecting portion 310; limiting strip 320; second limiting block 400; second connecting portion 410; pressing portion 420; heating block 500; heating pipe 600; thermocouple 700. DETAILED DESCRIPTION

[0043] In order to make the above objectives, characteristics and advantages of the present application more apparent, concrete embodiments of the present application will be described in detail below with reference to the drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways other than those described herein without departing from the spirit of the present application, and it can be apparent to those skilled in the art that similar modifications of the present application can be made without departing from the scope of the present application, and therefore the present application is not limited to the following disclosed specific embodiments.

[0044] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0045] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0046] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0048] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only embodiment.

[0049] Referring to Figures 1 to 5 The utility model discloses an embodiment provides a kind of hot head 100 buffer device, applied to the hot press of anisotropic conductive adhesive film pasting, hot head 100 buffer device includes pressure head 100 and silica gel strip 200, pressure head 100 includes pressure head body 110 and installation part 120, installation part 120 is protruded relative to the side surface of one side of pressure head 100;Silica gel strip 200 has installation cavity 210, installation cavity 210 is nested with installation part 120, to make silica gel strip 200 and pressure head 100 fixed.

[0050] The technical scheme provides a kind of hot head device, applied to the hot press of anisotropic conductive adhesive pasting, pressure head 100 can heat, and be used to paste anisotropic conductive adhesive between printed circuit board and flexible circuit board. Among them, pressure head body 110 is used to connect and support installation part 120, installation part 120 is set to the form that can be protruded relative to the side surface of one side of pressure head body 110, so as to make silica gel strip 200 and installation part 120 nest. And installation cavity 210 is set on silica gel strip 200, installation cavity 210 is nested with the installation part 120 of pressure head 100, so that silica gel strip 200 and pressure head 100 are fixed as integral form, so that the tightness degree of silica gel skin is kept consistent in the repeated feeding process when hot-pressing and bonding printed circuit board and flexible circuit board, so that ACF attachment stability is good. By embedding silica gel strip 200 on the installation part 120 of pressure head body 110, it becomes integrated design, and can be directly pressed down when working, to attach ACF on PCB, without designing external silica gel skin mechanism.

[0051] Specifically, the specific structure of the pressing head 100 is not limited, the pressing head body 110 is a flat square block structure, the mounting portion 120 is a cuboid structure, and the mounting portion 120 is fixedly connected to the bottom of the pressing head body 110. The pressing head body 110 and the mounting portion 120 can be integrally formed, or can be fixed together by welding or bolt connection. The specific shape of the silica gel strip 200 is the same as that of the mounting portion 120, and the mounting cavity 210 is matched with the shape of the mounting portion 120. However, the size of the mounting cavity 210 of the silica gel strip 200 should be smaller than that of the mounting portion 120, so that when the silica gel strip 200 is nested on the mounting portion 120, the two are tightly fitted, so that the silica gel strip 200 can be fixed relative to the mounting portion 120. In addition, in order to improve the bonding strength of the silica gel strip 200 and the mounting portion 120, the silica gel strip 200 can also be fixedly connected together by bonding.

[0052] As shown in Figure 3 and Figure 5 , in one embodiment, the mounting portion 120 includes a necked portion 121 and a protruding portion 122, the necked portion 121 is fixedly connected with the pressing head body 110, and the protruding portion 122 is connected to one end of the necked portion 121 away from the pressing head body 110. The cross-sectional width of the necked portion 121 is smaller than the cross-sectional width of the protruding portion 122.

[0053] By setting the mounting portion 120 as a connection between the necked portion 121 and the protruding portion 122, the necked portion 121 is arranged between the protruding portion 122 and the pressing head body 110, and the cross-sectional width of the necked portion 121 is set to be smaller than the cross-sectional width of the protruding portion 122. After the silica gel strip 200 is nested on the mounting portion 120, the silica gel strip 200 is limited by the size change of the necked portion 121 and the protruding portion 122. Specifically, the silica gel strip 200 is limited by the protruding portion 122, thereby further ensuring the reliability of the connection between the silica gel strip 200 and the mounting portion 120, and further ensuring the consistency of the tightness of the silica gel strip 200 and the pressing head 100, thereby making the ACF attachment stability better.

[0054] Further, the necked portion 121 and the protruding portion 122 are both configured as a cuboid structure, and the necked portion 121 is recessed at both ends in the length direction and the width direction relative to the protruding portion 122. In this way, the four end faces of the protruding portion 122 protrude from the necked portion 121, so that the protruding portion 122 can limit the silica gel strip 200 in four directions, thereby further improving the reliability of the connection between the silica gel strip 200 and the mounting portion 120, and further ensuring the consistency of the tightness of the silica gel strip 200 and the pressing head 100, thereby making the ACF attachment stability better.

[0055] As shown in Figure 3 and Figure 4 In one of the embodiments, the mounting cavity 210 comprises an expansion cavity 212 and a necked mouth 211, the expansion cavity 212 is adapted to the protrusion 122; the necked mouth 211 is adapted to the necked portion 121; wherein the opening size of the necked mouth 211 is smaller than the size of the expansion cavity 212 in the same direction of the opening; the size of the expansion cavity 212 is smaller than the size of the protrusion 122, and the size of the necked mouth 211 is smaller than the size of the necked portion 121.

[0056] By setting the mounting cavity 210 of the silica gel strip 200 into the form of the expansion cavity 212 and the necked mouth 211 in communication, and setting the expansion cavity 212 to be adapted to the protrusion 122 and the necked mouth 211 to be adapted to the necked portion 121. To improve the fit of the silica gel strip 200 and the mounting portion 120 nested, thereby ensuring the reliability of the fixed connection after the nesting of the two.

[0057] As shown in Figure 2 In one of the embodiments, the hot-press head device further comprises a first limiting block 300, which is detachably connected to one end of the head body 110, and the first limiting block 300 presses a part of the silica gel strip 200 to limit the silica gel strip 200.

[0058] The first limiting block 300 is detachably connected to one end of the head body 110 to press a part of the silica gel strip 200 through the first limiting block 300, thereby limiting the silica gel strip 200, so that the connection of the silica gel strip 200 and the mounting portion 120 is more firm and reliable, thereby ensuring the consistency of the tightness of the silica gel strip 200 and the head 100, so that the ACF attachment stability is better.

[0059] As shown in Figure 2 Specifically, the first limiting block 300 comprises a first connecting portion 310 and two limiting strips 320, the first connecting portion 310 is detachably connected with the head body 110, and the first connecting portion 310 presses one end of the silica gel strip 200; the two limiting strips 320 are fixedly connected to the end portions of the first connecting portion 310, the two limiting strips 320 are spaced apart, and each limiting strip 320 presses the end portion of the silica gel strip 200 away from the head body 110.

[0060] The first connecting part 310 is used for detachable connection with the pressure head body 110, so that the whole first limiting block 300 is detachably connected with the pressure head body 110. By abutting against one end of the silica gel strip 200, the first connecting part 310 limits the silica gel strip 200 along the extending direction of the silica gel strip 200. By connecting the two limiting strips 320 with the first connecting part 310, and spacing the two limiting strips 320, the bottom surface of the silica gel strip 200 is limited by the two limiting strips 320, so that the silica gel strip 200 is limited in the length direction and the height direction, thereby further improving the reliability of the connection between the silica gel strip 200 and the mounting part 120.

[0061] Specifically, the edge of the end of the silica gel strip 200 away from the pressure head body 110 is provided in the form of a circular arc chamfer. The two limiting strips 320 abut against the circular arc edge of the silica gel strip 200, and correspondingly, the surface of the limiting strip 320 abutting against the silica gel strip 200 is configured as an arc surface. In this way, the adhesion of the limiting strip 320 and the silica gel strip 200 can be improved, so as to increase the contact area therebetween, thereby improving the reliability of the limiting of the silica gel strip 200. In addition, the limiting strip 320 can not be exposed to the bottom surface of the silica gel strip 200, thereby preventing the limiting strip 320 from affecting the space of the working surface of the silica gel strip 200.

[0062] As shown in FIG. 1, Figure 2 In one embodiment, the hot press device further comprises a second limiting block 400, which is detachably connected to the end of the pressure head body 110 away from the first limiting block 300, and abuts against a part of the silica gel strip 200 to limit the silica gel strip 200.

[0063] The second limiting block 400 is detachably connected to the other end of the pressure head body 110, so as to abut against a part of the silica gel strip 200 to limit the silica gel strip 200, so that the connection between the silica gel strip 200 and the mounting part 120 is more firm and reliable, thereby ensuring the consistency of the tightness of the silica gel strip 200 and the pressure head 100, so that the ACF attaching stability is better.

[0064] As shown in FIG. 1, Figure 2 In one embodiment, the second limiting block 400 comprises a second connecting part 410 and an abutting part 420. The second connecting part 410 is detachably connected with the pressure head body 110. The abutting part 420 is connected to the second connecting part 410, and the end of the abutting part 420 abuts against the end of the silica gel strip 200 away from the first limiting block 300.

[0065] The second connecting block is detachably connected with the pressure head body 110 by detachably connecting the second connecting part 410 with the pressure head body 110. The two ends of the silica gel strip 200 in the extending direction are limited by the end of the pressing part 420 pressing against the end of the silica gel strip 200 away from the first limiting block 300, thereby improving the firmness and reliability of the connection between the silica gel strip 200 and the mounting part 120, and further ensuring the consistency of the tightness of the silica gel strip 200 and the pressure head 100, so that the ACF attaching stability is good.

[0066] Further, the second connecting part 410 is in a flat square structure, the second connecting part 410 is arranged on both sides of the pressure block body in the width direction, the mounting groove is arranged on the second connecting part 410, and the bolt is screwed with the pressure head body 110 through the mounting groove. The two ends of the pressing part 420 in the width direction are connected with the bottom surface of the second connecting part 410, and the bottom surface of the pressing part is not exposed to the bottom surface of the silica gel strip 200, and only limits the silica gel strip 200 in the length direction of the silica gel strip 200.

[0067] As shown in FIGS. Figure 1 and Figure 2 In one embodiment, the hot press head device further comprises a heating block 500 and a heating pipe 600, and the pressure head 100 is fixedly connected to the heating block 500. Two heating pipes 600 are connected to the heating block 500 at intervals, each heating pipe 600 has one end located in the heating block 500, and the two heating pipes 600 located in the heating block 500 are electrically connected. The heating pipe 600 can generate heat after being powered on, and exchanges heat with the heating block 500 to heat the heating block 500. Further, a thermocouple 700 for detecting temperature is arranged between the two heating pipes 600.

[0068] The heating block 500 generates heat by powering the two heating pipes 600, and the temperature of the heating block 500 is monitored by the thermocouple 700. The pressure head 100 is fixed below the heating block 500.

[0069] An embodiment of the utility model also provides a hot press, and the hot press comprises the hot press head device.

[0070] The hot press head device is applied in the hot press, the mounting cavity 210 is arranged on the silica gel strip 200, the mounting cavity 210 is nested with the mounting part 120 of the pressure head 100, so that the silica gel strip 200 and the pressure head 100 are fixed as an integrated form. When the printed circuit board and the flexible circuit board are hot-pressed and bonded, the tightness of the silica gel skin remains consistent during repeated feeding, so that the ACF attaching stability is good. The silica gel strip 200 is inlaid on the mounting part 120 of the pressure head body 110 as an integrated design, and can be directly pressed during work to attach the ACF on the PCB, and there is no need to design an external silica gel skin mechanism.

[0071] Each technical feature of the above-described embodiments can be combined with any other technical feature, and for the sake of brevity, not all possible combinations are described, but it is understood that each technical feature described above can be combined with any other technical feature described above, unless the combination is mutually exclusive.

[0072] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A hot press head device, used in a hot press for applying anisotropic conductive adhesive films, characterized in that, The hot press head device includes: The pressure head includes a pressure head body and a mounting part, wherein the mounting part protrudes from one side of the pressure head. A silicone strip having a mounting cavity that is nested with the mounting part to fix the silicone strip to the pressure head.

2. The hot press head device according to claim 1, characterized in that, The mounting unit includes: The neck is fixedly connected to the pressure head body; A protrusion is connected to one end of the constricted neck that is away from the pressure head body; The cross-sectional width of the constricted neck is smaller than the cross-sectional width of the protrusion.

3. The hot press head device according to claim 2, characterized in that, Both the constricted neck and the protrusion are constructed as cuboid structures. The neck is recessed relative to the protrusion at both ends in the length and width directions.

4. The hot press head device according to claim 2, characterized in that, The mounting cavity includes: An expansion cavity adapted to the protrusion; The constricted neck is adapted to the constricted neck. Wherein, the opening size of the constricted opening is smaller than the size of the expansion cavity in the same direction as the opening; The size of the expansion cavity is smaller than the size of the protrusion, and the size of the constricted opening is smaller than the size of the constricted neck.

5. The hot press head device according to claim 1, characterized in that, The hot press head device also includes: A first limiting block is detachably connected to one end of the pressure head body. The first limiting block presses against a portion of the silicone strip to limit the silicone strip.

6. The hot press head device according to claim 5, characterized in that, The first limiting block includes: The first connecting part is detachably connected to the pressure head body, and the first connecting part abuts against one end of the silicone strip; Two limiting strips are fixedly connected to the ends of the first connecting part, the two limiting strips are spaced apart, and each limiting strip abuts against the end of the silicone strip away from the pressure head body.

7. The hot press head device according to claim 5, characterized in that, The hot press head device also includes: The second limiting block is detachably connected to one end of the pressure head body away from the first limiting block. The second limiting block presses against a portion of the silicone strip to limit the silicone strip.

8. The hot press head device according to claim 7, characterized in that, The second limiting block includes: The second connecting part is detachably connected to the pressure head body; A pressing part is connected to the second connecting part, and the end of the pressing part presses against the end of the silicone strip that is away from the first limiting block.

9. The hot press head device according to any one of claims 1-8, characterized in that, The hot press head device also includes: A heating element, wherein the pressure head is fixedly connected to the heating element; The heating element is connected to the heating block at intervals. One end of each heating element is located inside the heating block. The portions of the two heating elements located inside the heating block are electrically connected. When the heating element is energized, it can generate heat and exchange heat with the heating block to make the heating block heat up.

10. A hot press, characterized in that, The hot press includes a hot press head device as described in any one of claims 1-9.

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