Novel composite die structure for FPC bending shaping and silica gel extrusion forming

Abstract

The utility model relates to an FPC (Flexible Printed Circuit) technology, and discloses a novel composite die structure for FPC bending shaping and silica gel extrusion forming, which comprises a forming lower die for limiting an FPC, a first upper die for pressing and shaping the FPC limited by the forming lower die, and a second upper die for injecting liquid silica gel to the FPC, the first upper die is provided with a forming pressing block, the end, close to the forming lower die, of the forming pressing block is provided with a wavy extrusion part, the forming lower die is provided with a wavy concave part matched with the extrusion part, and the multiple extrusion parts are used for extruding the FPC to form a wavy bent part on the FPC; the second upper die comprises a first upper plate and a material extruding plate movably arranged relative to the first upper plate, the first upper plate is provided with a liquid storage groove used for containing external liquid silica gel and a material extruding hole communicated with the liquid storage groove, and the material extruding plate is provided with a protruding part used in cooperation with the liquid storage groove; and the lug boss is used for extruding and injecting the liquid silica gel in the liquid storage tank onto the bending part of the FPC carried by the forming lower die through the material extruding hole.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, and in particular discloses a novel composite mold structure for FPC bending and shaping and silicone extrusion molding. Background Art

[0002] In the electronics manufacturing industry, flexible printed circuits (FPCs) are widely used in various portable electronic devices due to their lightness and bendability. Since electronic devices using FPCs often bend or twist in daily use, FPCs need to undergo specific bending and shaping processes during production to adapt to specific shapes and functional requirements. This process places high demands on mold design. Traditional FPCs are straight and easily damaged by external forces in implants. Utility Model Content

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a new composite mold structure for FPC bending and shaping and silicone extrusion molding to solve the above technical problems.

[0004] To achieve the above-mentioned purpose, the utility model provides a novel composite mold structure for FPC bending and shaping and silicone extrusion molding, comprising a molding lower mold for limiting the FPC, a first upper mold for pressing and shaping the FPC limited by the molding lower mold, and a second upper mold for injecting liquid silicone into the FPC; the first upper mold has a molding block, and an arc-shaped extrusion portion is provided at one end of the molding block close to the molding lower mold, and a wave-shaped concave portion matched with the extrusion portion is provided on the molding lower mold, and multiple extrusion portions are used to extrude the FPC to form multiple arc-shaped bending portions on the FPC;

[0005] The second upper mold includes a first upper plate and an extrusion plate movably arranged relative to the first upper plate. The first upper plate is provided with a liquid storage tank for accommodating external liquid silicone and an extrusion hole connected to the liquid storage tank. The extrusion plate is provided with a protrusion used in conjunction with the liquid storage tank. The protrusion is used to extrude and inject the liquid silicone in the liquid storage tank through the extrusion hole onto the bending part of the FPC carried by the molding lower mold.

[0006] Furthermore, the cross section of the protrusion is trapezoidal, the width of the protrusion gradually decreases from the extrusion plate to the liquid storage tank, and the shape of the liquid storage tank matches the shape of the protrusion.

[0007] Furthermore, at least two extrusion parts are provided, and one extrusion part and the extrusion part adjacent thereto are connected to each other in a continuous and uninterrupted wave shape.

[0008] Furthermore, the molding lower mold is provided with a first positioning member and a second positioning member respectively located on both sides of the width direction of the FPC, the first positioning member and the second positioning member are respectively located on both sides of the wave-shaped recessed portion, and the molding block and the first upper plate are both provided with a first card groove for accommodating the first positioning member and the second positioning member.

[0009] Furthermore, the first positioning member has an end away from the FPC and is provided with a guiding slope extending and tilted toward the FPC, the guiding slope is used for installing the FPC, and the second positioning member is provided with an inclined material taking groove, through which the external material taking member takes the FPC out of the molding lower mold.

[0010] Furthermore, a cross-sectional area of ​​the second positioning member is smaller than a cross-sectional area of ​​the first positioning member.

[0011] Furthermore, a third positioning member is provided on the molding lower mold, and the first upper mold and the first upper plate are both provided with a second slot for accommodating the third positioning member. There are multiple third positioning members, and the multiple third positioning members are arranged along the length direction of the FPC. Two adjacent third positioning members are respectively located on both sides of the width direction of the FPC, and each third positioning member is provided with the guide slope.

[0012] Furthermore, the molding lower mold and the first upper plate are respectively provided with two connector slots, and the two connector slots are respectively located at two ends of the length direction of the FPC to limit the connector of the FPC.

[0013] Furthermore, the novel composite mold structure also includes two guide pillars. The molding lower mold, the first upper mold and the second upper mold are all provided with perforations or guide grooves for accommodating the guide pillars. The molding lower mold and the first upper mold, the molding lower mold and the second upper mold are all reciprocatingly matched through the guide pillars and the perforations. The guide pillars are detachably connected to the molding lower mold or the upper mold.

[0014] Furthermore, a first glue containing groove is provided at one end of the first upper plate away from the liquid storage tank, and the first glue containing groove is connected to the liquid storage tank via an extrusion hole. When the first upper plate and the molding lower mold are in abutment with each other, the first glue containing groove accommodates the bending part, and the liquid silicone in the first glue containing groove is used to mold a support member on the bending part.

[0015] Furthermore, the first upper plate is provided with two second glue containing grooves connected to the first glue containing groove, and the two second glue containing grooves are respectively located at both ends of the length direction of the first glue containing groove. The liquid silicone in the second sol groove is used to form a connecting part on the support part, and the connecting part is used to connect the support part and the external electronic equipment.

[0016] Beneficial effects of the utility model: the utility model is a new type of composite mold structure for FPC bending and shaping and silicone extrusion molding, including a molding lower mold for limiting the FPC, a first upper mold for pressing and shaping the FPC, and a second upper mold for injecting liquid silicone into the FPC. By arranging multiple wavy recessed portions on the molding lower mold, arranging a molding pressure block on the first upper mold, and arranging multiple arc-shaped extrusion portions on the pressure block, the bending and shaping of the FPC are achieved by the cooperation of the two; a first upper plate with a liquid storage tank is provided on the second upper mold, a groove for accommodating the above-mentioned bending portion is provided under the first upper plate, and an extrusion hole is provided to connect the liquid storage tank and the groove, and an extrusion plate is movably provided on the first upper plate to extrude and mold the liquid silicone in the liquid storage tank onto the bent FPC.

[0017] Multiple arc-shaped extrusion parts squeeze the middle part of the FPC to form a wavy bend, and then liquid silicone is injected on the wavy bend to wait for molding; the FPC with this structural design will greatly increase the structural strength, the number of bending times will also increase, and the service life of the FPC will be extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the explosion state of the utility model;

[0019] Figure 2 It is a three-dimensional structural schematic diagram of the lower forming die of the utility model;

[0020] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of part A;

[0021] Figure 4 It is a three-dimensional structural schematic diagram of the first upper mold of the utility model;

[0022] Figure 5 It is a three-dimensional structural schematic diagram of the forming block of the utility model;

[0023] Figure 6 It is a side view of the forming block of the utility model;

[0024] Figure 7 It is a three-dimensional (top view) structural schematic diagram of the first upper plate of the utility model;

[0025] Figure 8 It is a three-dimensional (bottom-up) structural schematic diagram of the first upper plate of the utility model;

[0026] Fig. 9 for Figure 8 A schematic diagram of the enlarged structure of part B;

[0027] Fig.10 It is a three-dimensional structural schematic diagram of the extrusion plate of the utility model;

[0028] Fig.11 This is a diagram showing the use state of the first upper die of the utility model in cooperation with the lower die for forming;

[0029] Fig.12 This is a diagram showing the state of use of the second upper die of the utility model in cooperation with the lower die for forming;

[0030] Fig.13 It is a schematic diagram of the structure of the FPC after being formed by the composite mold of the utility model.

[0031] Reference numerals include:

[0032] 1. Molding lower die; 2. First upper die; 3. Second upper die; 4. First card slot; 5. Second card slot; 6. Connector card slot; 7. Guide column; 71. Perforation; 8. Support member; 9. Connector; 11. Recessed portion; 12. First positioning member; 120. Guide slope; 13. Second positioning member; 130. Material taking trough; 14. Third positioning member; 15. Fourth positioning member; 21. Molding block; 22. Extrusion portion; 31. First upper plate; 310. First sol trough; 3101. Bending portion; 311. Second sol trough; 32. Extrusion plate; 320. Protrusion; 33. Liquid storage tank; 34. Extrusion hole; 100. Bending portion. DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0034] See also Figures 1 to 13 As shown, a new composite mold structure for FPC bending and shaping and silicone extrusion molding of the utility model comprises a molding lower mold 1 for limiting the FPC, a first upper mold 2 for pressing and shaping the FPC limited by the molding lower mold 1, and a second upper mold 3 for injecting liquid silicone into the FPC; the first upper mold 2 has a molding block 21, and the molding block 21 is provided with a wavy extrusion portion 22 at one end close to the molding lower mold 1, and the molding lower mold 1 is provided with a wavy recessed portion 11 matched with the extrusion portion 22, and the multiple extrusion portions 22 are used to extrude the FPC to form multiple arc-shaped bending portions 100 thereon; the wavy bending portions 100 are used to improve the durability of the FPC;

[0035] The second upper mold 3 includes a first upper plate 31 and an extrusion plate 32 movably arranged relative to the first upper plate 31. The first upper plate 31 is provided with a liquid storage tank 33 for accommodating external liquid silicone and an extrusion hole 34 connected to the liquid storage tank 33. The extrusion plate 32 is provided with a protrusion 320 used in conjunction with the liquid storage tank 33. The protrusion 320 is used to extrude and inject the liquid silicone in the liquid storage tank 33 through the extrusion hole 34 onto the bending portion 100 of the FPC carried by the molding lower mold 1.

[0036] In this embodiment, the molding lower die 1, the first upper plate 31, and the extrusion plate 32 are roughly rectangular, and the shaping block is arranged in a long strip shape. The shaping block and the first upper die 2 are detachably connected by screws. In actual use, different specifications of the extrusion parts 22 can be customized on different shaping blocks, such as adjusting the distance between two adjacent crests or troughs of the wave-shaped extrusion part 22; the most suitable shaping block is selected for pressing and shaping for FPC in different usage scenarios. In actual use, the FPC needs to be heated to a plastic state by the molding lower die 1. According to the usage, cold pressing can also be selected; in actual use, a heating device can be set to cooperate with the molding lower die 1, and the heating device is used to heat the molding lower die 1 to make the FPC plastic.

[0037] Specifically, the extrusion parts 22 are provided in plurality, and the plurality of extrusion parts 22 are arranged in an array along the length direction of the shaping block, and the contours of the wave-shaped recessed part 11 and the extrusion parts 22 cooperate with each other. The provision of the plurality of extrusion parts 22 improves the working efficiency of the mold, and in actual use, the number of the extrusion parts 22 can be adjusted according to demand.

[0038] Specifically, the molding lower mold 1 is provided with a first positioning member 12 and a second positioning member 13 respectively located on the left and right sides of the FPC, the first positioning member 12 and the second positioning member 13 are respectively located on both sides of the wave-shaped recessed portion 11, and the molding block 21 and the first upper plate 31 are both provided with two first card slots 4 for accommodating the first positioning member 12 and the second positioning member 13. The number of the first card slots 4 is matched with the number of the wave-shaped extrusion portions 22 on the molding block 21, and the relationship between the number and position thereof is as follows: one extrusion portion 22 is provided for each of the two first card slots 4, and the extrusion portion 22 is located between the two first card slots 4.

[0039] Specifically, the first positioning member 12 is provided with a guide slope 120 extending and tilted toward the FPC at one end away from the FPC, and the guide slope 120 is used for installing the FPC, and the second positioning member 13 is provided with an inclined material taking groove 130, and the external material taking member takes the FPC out of the molding lower mold 1 through the material taking groove 130. The setting of the guide slope 120 further improves the efficiency of FPC installation and prevents jamming when installing the FPC. The tilting direction of the material taking groove 130 intersects with the tilting direction of the guide slope 120, so that they can work independently without affecting each other when taking and placing the FPC.

[0040] In actual use, after the FPC is folded in a wave shape and injected with liquid silicone to form, the finished FPC can be lifted out with the help of the top of the second positioning member 13 after penetrating the feed trough 130 through an external tool. In this embodiment, multiple plugs are installed through an integrated tool, and multiple FPCs on the molding lower mold 1 can be taken out at the same time.

[0041] Specifically, the cross-sectional area of ​​the second positioning member 13 is smaller than that of the first positioning member 12. The design of the two positioning members of different sizes can distinguish the different functions between the two. The first positioning member 12 with a larger size is provided with a guide slope 120, which can provide as much convenience as possible for the installation of the FPC, and the second positioning member 13 with a smaller size is provided with a material taking groove 130, which can reduce the resistance as much as possible when taking the material.

[0042] Specifically, the molding lower mold 1 is also provided with a third positioning member 14, and the first upper mold 2 and the first upper plate 31 are both provided with a second card slot 5 for accommodating the third positioning member 14. The number of the third positioning members 14 is multiple, and the multiple third positioning members 14 are arranged along the length direction of the FPC, and two adjacent third positioning members 14 are respectively located on both sides of the width direction of the FPC, and each third positioning member is provided with a guiding inclined surface 120. In this embodiment, 7 third positioning members 14 are correspondingly arranged for one FPC, wherein: four third positioning members 14 are divided into the first group and the second group, and the other three third positioning members 14 are listed as the third group. The first and second groups of third positioning members 14 are respectively located in the middle of the length direction of the FPC and close to the end to assist the first positioning member 12 and the second positioning member 13 in fixing the middle of the FPC, and the third group of third positioning members 14 is located at the end of the FPC, and the connector card slot 6 on the molding lower mold 1 mentioned below is located between the third group (three third positioning members 14) to fix the connector at one end of the FPC.

[0043] Specifically, at least two fourth positioning members 15 are provided on the first upper mold 2 and the second upper mold 3, and the fourth positioning members 15 are arranged in a "door" shape, and the molding lower mold 1 is provided with a slot for accommodating the fourth positioning members 15. The middle parts of the two "door"-shaped fourth positioning members 15 are used to limit the two ends of the length direction of the FPC on the molding lower mold 1 respectively.

[0044] Specifically, the molding lower mold 1 and the first upper plate 31 are respectively provided with two connector slots 6, and the two connector slots 6 are respectively located at both ends of the length direction of the FPC to limit the connector of the FPC. In this embodiment, the connector slot 6 on the first upper plate 31 is located between the two second slots 5 thereon and communicates with the two second slots 5; when the first upper plate 31 and the molding lower mold 1 are in contact with each other, the second slots 5 and the connector slot 6 on the first upper plate 31 respectively accommodate the third positioning member 14 and the connector at the other end of the FPC.

[0045] Specifically, the novel composite mold structure also includes two guide posts 7. The molding lower mold 1, the first upper mold 2, and the second upper mold 3 are all provided with perforations 71 or guide grooves for accommodating the guide posts 7. The molding lower mold 1 and the first upper mold 2, the molding lower mold 1 and the second upper mold 3 are reciprocatingly matched through the guide posts 7 and the perforations 71. The guide posts 7 are detachably connected to the molding lower mold 1 or the upper mold. In actual use, the guide posts 7 can be set on the molding upper mold or the first upper mold 2, the second upper mold 3, and correspondingly, the first upper mold 2, the second upper mold 3, or the molding upper mold are correspondingly provided with notches or holes for accommodating the guide posts 7.

[0046] Specifically, a first glue containing groove is provided at one end of the first upper plate 31 away from the liquid storage tank 33, and the first glue containing groove is connected to the liquid storage tank 33 via the extrusion hole 34. When the first upper plate 31 and the molding lower mold 1 are in abutment with each other, the first glue containing groove contains the bending portion 100, and the liquid silicone in the first glue containing groove is used to form the support member 8 on the bending portion 100. In this embodiment, an arc-shaped bending portion 3101 is convexly formed at the bottom of the first glue containing groove. When the liquid silicone in the first glue containing groove is formed, the arc-shaped bending portion 3101 simultaneously forms an arc-shaped groove on the support member 8, and the arc-shaped groove is used to connect the internal components of the external electronic device, which can further fix the support member 8.

[0047] Specifically, the first upper plate 31 is also provided with two second glue containing grooves connected to the first glue containing groove, and the two second glue containing grooves are respectively located at the two ends of the length direction of the first glue containing groove, and the liquid silicone in the second sol groove 311 is used to form a connector 9 on the support member 8, and the connector 9 is used to connect the support member 8 with external electronic equipment. In this embodiment, the arc-shaped curved portion 3101 extends into the second sol groove 311. After the liquid silicone is formed, the second sol groove 311 and the liquid silicone in the arc-shaped curved portion 3101 jointly form the connector 9. The connector 9 has two clamping arms protruding from the end face of the support member 8 (formed by the liquid silicone squeezed by the arc-shaped curved portion 3101). When in use, the support member 8 together with the FPC can be stably connected to the internal components of the electronic device through the two clamping arms.

[0048] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A novel composite mold structure for FPC bending and shaping and silicone extrusion molding, comprising a molding lower mold (1) for limiting the position of the FPC, a first upper mold (2) for pressing and shaping the FPC limited by the molding lower mold (1), and a second upper mold (3) for injecting liquid silicone into the FPC; characterized in that: The first upper mold (2) has a molding block (21), and a wavy extrusion portion (22) is provided at one end of the molding block (21) close to the molding lower mold (1). The molding lower mold (1) is provided with a wavy recessed portion (11) that cooperates with the extrusion portion (22). The plurality of extrusion portions (22) are used to extrude the FPC to form a wavy bending portion (100) on the FPC. The second upper mold (3) comprises a first upper plate (31) and an extrusion plate (32) movably arranged relative to the first upper plate (31); the first upper plate (31) is provided with a liquid storage tank (33) for accommodating external liquid silicone and an extrusion hole (34) connected to the liquid storage tank (33); the extrusion plate (32) is provided with a protrusion (320) used in conjunction with the liquid storage tank (33); the protrusion (320) is used to extrude and inject the liquid silicone in the liquid storage tank (33) through the extrusion hole (34) onto the bending part (100) of the FPC carried by the molding lower mold (1).

2. According to claim 1, a novel composite mold structure for FPC bending and shaping and silicone extrusion molding is characterized by: A plurality of the extrusion parts (22) are provided, and the plurality of extrusion parts (22) are arranged in an array along the length direction of the shaping block, and the contours of the wave-shaped recessed part (11) and the extrusion part (22) cooperate with each other.

3. According to claim 1, a novel composite mold structure for FPC bending and shaping and silicone extrusion molding is characterized by: The lower molding die (1) is provided with a first positioning member (12) and a second positioning member (13) on both sides of the width direction of the FPC, the first positioning member (12) and the second positioning member (13) are respectively located on both sides of the wave-shaped recessed portion (11), and the molding block (21) and the first upper plate (31) are both provided with two first slots (4) for accommodating the first positioning member (12) and the second positioning member (13).

4. According to claim 3, a novel composite mold structure for FPC bending and shaping and silicone extrusion molding is characterized by: The first positioning member (12) is provided with a guide slope (120) extending and tilted toward the FPC at one end away from the FPC, and the FPC is installed between the first positioning member (12) and the second positioning member (13) via the guide slope (120), and the second positioning member (13) is provided with an inclined material taking groove (130), and an external material taking member takes the FPC out of the molding lower mold (1) via the material taking groove (130).

5. According to claim 3, a novel composite mold structure for FPC bending and shaping and silicone extrusion molding is characterized by: The cross-sectional area of ​​the second positioning member (13) is smaller than the cross-sectional area of ​​the first positioning member (12).

6. According to claim 4, a novel composite mold structure for FPC bending and shaping and silicone extrusion molding is characterized by: The molding lower mold (1) is also provided with a third positioning member (14), and the first upper mold (2) and the first upper plate (31) are both provided with a second slot (5) for accommodating the third positioning member (14). The number of the third positioning members (14) is multiple, and the multiple third positioning members (14) are arranged along the length direction of the FPC, and two adjacent third positioning members (14) are respectively located on both sides of the width direction of the FPC, and each third positioning member (14) is provided with the guiding inclined surface (120) on a side close to the FPC.

7. The novel composite mold structure for FPC bending and shaping and silicone extrusion molding according to claim 1 is characterized by: The lower molding die (1) and the first upper plate (31) are respectively provided with two connector slots (6), and the two connector slots (6) are respectively located at two ends in the length direction of the FPC to limit the connector of the FPC.

8. The novel composite mold structure for FPC bending and shaping and silicone extrusion molding according to claim 1 is characterized by: The novel composite mold structure also includes at least two guide pillars (7), and the molding lower mold (1), the first upper mold (2) and the second upper mold (3) are all provided with through holes (71) or guide grooves for accommodating the guide pillars (7). The molding lower mold (1) and the first upper mold (2), and the molding lower mold (1) and the second upper mold (3) are all reciprocatingly matched via the guide pillars (7).

9. The novel composite mold structure for FPC bending and shaping and silicone extrusion molding according to claim 1 is characterized in that: A first glue containing groove is provided at one end of the first upper plate (31) away from the liquid storage tank (33), and the first glue containing groove is connected to the liquid storage tank (33) via an extrusion hole (34). When the first upper plate (31) and the molding lower mold (1) are in contact with each other, the first glue containing groove contains the bending portion (100), and the liquid silicone in the first glue containing groove is used to form a support member (8) on the wavy bending portion (100).

10. A novel composite mold structure for FPC bending and shaping and silicone extrusion molding according to claim 9, characterized in that: The first upper plate (31) is also provided with two second glue containing grooves connected to the first glue containing groove, and the two second glue containing grooves are respectively located at two ends of the length direction of the first glue containing groove. The liquid silicone in the second sol groove (311) is used to form a connecting piece (9) on the supporting piece (8), and the connecting piece (9) is used to connect the supporting piece (8) with external electronic equipment.

Images