CN215241358U - Punching die for waste edge of PANEL structure of rigid-flex board - Google Patents

Abstract

The utility model provides a punching die for waste edges of a soft and hard combined plate PANEL structure, which comprises an upper die and a lower die which are positioned above and below the soft and hard combined plate PANEL structure to be punched; the bottom surface of the upper die is provided with a punching needle for punching a waste edge, and the top surface of the lower die is provided with a knife edge capable of accommodating the punching needle; the punching needle is approximately L-shaped and comprises an X edge and a Y edge which are vertically connected through end parts, an arc section I is arranged at the vertical connection position of the X edge and the Y edge, and an arc section II which is in mirror symmetry with the Y edge and is arranged at the position, close to the end part, of the free end of the X edge is opposite to the arc section I. Use the utility model discloses the PANEL border dimensional tolerance of the soft and hard combined board PANEL structure after die-cut of die-cut mould can reach 0.1mm, and the right angle of soft and hard combined board PANEL structure is whole to become the fillet, improves product quality, practices thrift manufacturing cost, improves production efficiency.

Description

Punching die for waste edge of PANEL structure of rigid-flex board

Technical Field

The utility model belongs to the technical field of rigid-flex board technique and specifically relates to a die-cut mould on rigid-flex board PANEL waste material limit is related to.

Background

The rigid-flex board is a circuit board with the three-dimensional assembly performance of the flexible board and the stability of the rigid board, the development prospect is very considerable, the flexible-flex board is particularly highlighted in the field of smart phones, and the requirements of a camera lens, a screen signal connection, a battery module and the like on the rigid-flex board are greatly improved.

As the demand of rigid-flex boards increases, the quality requirements of the corresponding rigid-flex board products become higher and higher, and the problems to be solved in the specific production process also increase, as is well known, rigid-flex boards are made of FCCL, CVL protective films, PP, copper-clad plates, pure copper foils, adhesive glues and other materials through high-temperature pressing, as shown in fig. 1. Due to the diversification of materials, the deviation of +/-1.5 mm exists on the edge of the laminated board, and in addition, the materials of PP and the adhesive have certain fluidity, and the edge of the flexible-rigid combined board PANEL has certain residual glue and copper slag, so that the sizes of the same batch of products are uneven, as shown in figure 2. The above phenomena have certain influence on the produced products and quality: (1) the residual glue and copper slag on the edge of the plate can fall into a chemical liquid medicine tank in the production process, so that PTH (plated through hole) wires, copper-plated wires, surface treatment wires and the like can be polluted, tank liquid is polluted, and the product quality is influenced; (2) when the solder mask is manufactured, products printed with printing ink by silk screen are usually inserted into a pig cage frame, the pig cage frame takes a rigid-flexible board with the largest size as a reference object, sliding screws are locked, but products with smaller sizes can slide out of slots of the pig cage frame due to different sizes of the products, the situation of plate stacking is easy to occur, the printing ink is not pre-baked at the moment, the plate surfaces are in a sticky state, the printing ink is mutually reverse sticky, and the poor quality of oil falling, copper exposure and the like of the plate surfaces is caused; (3) four corners of the newly laminated flexible-rigid board PANEL structure are right angles close to 90 degrees, and are very sharp, so that in the production process of the flexible-rigid board with up to 20 working procedures, the board corners of one product are very easy to collide with the board surface of another product and scratch, thereby causing open circuit of circuits, oil dropping during welding prevention, scratching of gold surfaces and other poor quality.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a die-cut mould on soft or hard combination board PANEL structure waste material limit, the border dimensional tolerance of the soft or hard combination board PANEL structure after realizing die-cut can reach 0.1mm, the right angle of soft or hard combination board PANEL structure is whole to become the fillet, the cull of flange limit, the copper slag has all been detached by die-cut one-tenth waste material, the flange limit is smooth level and smooth, improve product quality, practice thrift manufacturing cost, improve production efficiency.

In order to solve the technical problem, the utility model provides a punching die for the waste edge of the soft and hard combined plate PANEL structure, which comprises an upper die and a lower die which are positioned above and below the soft and hard combined plate PANEL structure to be punched; the bottom surface of the upper die is provided with a punching needle for punching a waste edge, and the top surface of the lower die is provided with a knife edge capable of accommodating the punching needle; the punching needle is approximately L-shaped and comprises an X edge and a Y edge which are vertically connected through end parts, an arc section I is arranged at the vertical connection position of the X edge and the Y edge, and an arc section II which is in mirror symmetry with the Y edge and is arranged at the position, close to the end part, of the free end of the X edge is opposite to the arc section I.

Preferably, the bottom surface of the upper die is provided with a plurality of positioning guide pillars for guiding, and the top surface of the lower die is provided with a plurality of limiting holes capable of accommodating the positioning guide pillars.

Preferably, at least two positioning pins for limiting the position of the soft and hard combined board PANEL structure to be punched are arranged near the edge of each edge of the top surface of the lower die.

Preferably, the upper die comprises a die head plate, a punch pin plate and a stripper plate which are sequentially stacked from top to bottom, and the punch pin is fixed on the punch pin plate and vertically penetrates through the stripper plate.

Preferably, the lower die includes a bottom plate and a cutting edge plate stacked in sequence from bottom to top.

Preferably, the number of the positioning needles is four, and every two positioning needles are arranged at intervals along the length direction of each edge of the knife edge.

Preferably, the vertical distance between the positioning needle and the adjacent edge of the knife edge on the knife edge plate is not less than 3.5 mm.

Preferably, the upper mold and the lower mold have an L-shape.

The utility model relates to a die-cut mould on soft or hard combined plate PANEL structure waste material limit compares with current design, and its advantage lies in: on the premise of saving production cost and ensuring production efficiency, a punching process is added to the drilling process and the PTH process of the rigid-flexible printed circuit board simultaneously through the specific punching needle shape on the universal rigid-flexible printed circuit board (PANEL) structure waste edge punching die (rigid-flexible printed circuit boards of different models can be used) and the arrangement of the positioning needle on the periphery of the punching needle matched with the positioning hole at the edge of the rigid-flexible printed circuit board (PANEL) structure to be punched. Through the improvement, the three problems influencing the quality in the background technology are well solved.

Drawings

Fig. 1 is a schematic longitudinal section of a die-cut rigid-flex board to be used with the die-cut mold of the present invention.

Fig. 2 is a schematic diagram of a frame of a die-cut rigid-flex board to be used with the die-cut mold of the present invention.

Fig. 3 is a schematic view of the punching die of the present invention.

Fig. 4 is a schematic view of the shape of the punching pin of the punching die of the present invention.

Fig. 5 is an enlarged schematic view of the part E in fig. 4 according to the present invention.

Fig. 6 is an enlarged schematic view of the portion F in fig. 4 according to the present invention.

Fig. 7 is a schematic diagram of the structure of the die-cut soft and hard combined plate PANEL of the die-cut die of the present invention.

Fig. 8 is a schematic diagram of the structure of the soft and hard combined board PANEL after die cutting by the die-cutting die of the present invention.

Detailed Description

The invention is described in detail below with reference to the drawings and specific examples.

The utility model relates to a die-cut mould on die-cut soft or hard combined plate PANEL structure waste material limit, as shown in fig. 3 ~ 4, this die-cut mould 100 is including being located the last mould 10 of treating die-cut soft or hard combined plate PANEL structure 300 top and being located the bed die 20 of treating die-cut soft or hard combined plate PANEL structure 300 below, go up mould 10 and bed die 20 pressfitting from top to bottom, the location guide pillar 11 adaptation of the vertical setting of going up mould 10 bottom surface is pegged graft in the spacing hole 21 of bed die 20 top surface, locate and fall behind the die-cut soft or hard combined plate PANEL structure 300 of the punching needle 12 die-cut soft or hard combined plate of the roughly L type of mould 10 bottom surface and arrange in the edge of a knife 22 of the roughly L type of bed die 20 top surface in, accomplish a die-cut.

As shown in fig. 3, the upper die 10 is a schematic view with the bottom surface facing upward, the upper die 10 includes a die head plate 13, a punch pin plate 14, and a stripper plate 15 (three layers of plates are fastened by screws), which are sequentially stacked and fixed from top to bottom, the punch pin 12 is fastened to the punch pin plate 14 by screws and extends out of the bottom surface of the stripper plate 15 after penetrating through the stripper plate 15, and 3 to 6 of the positioning guide posts 11 are cylindrical and vertically arranged on the bottom surface of the stripper plate 15 and located at the periphery of the punch pin plate 14. As shown in fig. 3, the lower mold 20 is a schematic diagram with the top surface facing upward, the lower mold 20 includes a bottom plate 23 and a knife-edge plate 24 (the two plates are riveted together by screws) stacked in sequence from bottom to top, the knife-edge 22 is a groove which is opened on the top surface of the knife-edge plate 24, is matched with the punch pin 12 in shape, and can realize the entry and exit of the punch pin 12; 3-6 limiting grooves 21 are arranged on the periphery of the top surface of the cutting edge plate 24 and are cylindrical grooves corresponding to the positioning guide pillars 11 one to one. At least two positioning pins 25 for positioning the soft and hard combined plate PANEL structure are respectively arranged on the knife edge plate 24 near two edges of the knife edge 22, and the number and the positions of the positioning pins 25 correspond to the positions of the positioning holes 301 on the soft and hard combined plate PANEL structure to be punched.

The die head plate 13, the punching needle plate 14 and the stripper plate 15 in the upper die 10 are arranged to be L-shaped according to the shape of the punching needle 12, and the bottom plate 23 and the knife edge plate 24 in the lower die 20 are arranged to be L-shaped according to the shape of the knife edge 22, so that useless areas of the punching die 100 are removed, and the effects of saving die material cost and reducing die weight are achieved.

As a preferred embodiment, the length of the mold is 500-600 mm, preferably 560mm, the width is 300-400 mm, preferably 340mm, and the height after mold closing is 100-150 mm, preferably 125 mm.

As shown in fig. 4 to 6, which are schematic diagrams of the shapes of the punch pin 12 and the knife edge 22, the length of the X side 101 of the punch pin 12 and the knife edge 22 is 252.2 ± 0.1mm, the length of the Y side 102 is 400 to 500mm, and the preferred value is 409.5mm, an arc section I103 with R2.0 ± 0.5mm is arranged at the vertical connection position of the X side 101 and the Y side 102, in addition, an arc section II 104 with R2.0 ± 0.5mm is arranged at the free end (tail end) of the X side 101, the arc section II 104 and the arc section I103 are in mirror symmetry relative to the Y side 102, and the free end of the arc section II 104 is connected with a tail section parallel to the X side 101. The main function of the punching needle 12 and the knife edge 22 provided with the circular arc section I103 and the circular arc section II 104 is to punch and cut the right angle of the waste edge of the PANEL structure of the rigid-flexible printed circuit board into a round angle with the dimension of R2.0 +/-0.5 mm. Two positioning needles 25 with the size of R1.95 +/-0.2 mm are respectively arranged at the edges of an X edge 101 and a Y edge 102 of a knife edge 22 of the lower die 20, and the vertical distance between the center of each positioning needle 25 and the adjacent edge of the knife edge 22 is 1.5-2.0 mm.

The die head plate 13 and the bottom plate 23 are made of 45# high-quality carbon structural steel with good mechanical property, the thickness is 40mm, and the die is prevented from being deformed by stamping; the punch needle plate 14 is used for fixing the punch needle 12 and is made of Cr12MOV carbon molybdenum steel with excellent wear resistance, hardenability, toughness, thermal stability, compressive strength, micro-deformation and heald platform performance, so that the punch needle is prevented from being deformed due to stress during punching; the stripper plate 15 is also made of Cr12MOV carbon molybdenum steel which is the same as the punch plate 14 and is used as a returned material after die parting; as the core of the die, the knife edge plate 24 and the punching pin 12 are made of DC53 material with better performance than SKD11, the hardness after heat treatment reaches more than 60HB, and the efficiency can be improved no matter the punching service life, the precision or the later maintenance. Two pairs of positioning guide posts 11 which play a positioning role in die assembly adopt common Missimi guide posts with the outer diameter of 19mm for a high-precision die, so that the accurate positioning of the concave-convex die in die assembly is ensured, and the punching frequency reaches more than 35 ten thousand times.

Use the utility model discloses die-cut technology of die-cut mould in soft or hard combination board PANEL structure waste material limit on the basis of "preceding flow-lamination-drilling-PTH-back flow" of current soft or hard combination board PANEL structure production technology, increase "die-cut" technology between "drilling" and "PTH", the production flow after the adjustment is: the former process, the lamination, the drilling, the punching, the PTH and the latter process specifically include the following steps (the prior art is not described in detail):

step one, a front flow process; the former process is the inner layer manufacture of the soft and hard combined plate, the FCCL 301 blanking, the inner layer circuit etching and the double-sided joint CVL 302 are carried out, and the inner layer core plate is formed. The process of the section is the base stone manufactured by the soft and hard combined plate, and plays an important role in quality.

Step two, a lamination process; the lamination refers to pressing the upper prepreg PP 303, the lower prepreg PP 303, the inner core board and the upper pure copper foil Cu 304 into a prototype of a flexible-rigid combined board PANEL structure by utilizing the pressure action of a pressure transmission machine;

step three, drilling; the drilling is to drill required holes on a copper foil BASE material or an internal layer BASE semi-finished product by using a drill at a high rotating speed and a high falling speed, wherein the required holes comprise holes for conducting among all layers of the circuit board, assembly holes required for assembling and positioning holes required for positioning with a punching die in a post process, and 8 positioning holes for punching are additionally arranged in the specific embodiment.

Step four, punching process, namely punching the waste edge of the PANEL structure of the rigid-flex printed circuit board, specifically comprising the following steps:

step 4.1, punching the side A and the side B of the PANEL structure waste edge of the rigid-flexible printed circuit board;

the method comprises the steps of placing a to-be-punched soft and hard combined plate PANEL structure on the top surface of a lower die 20 of a punching die 100, enabling the edges of an edge A302 and an edge B303 to fall above an edge X101 and an edge Y102 of a knife edge 22 of the lower die 20, enabling positioning pins 25 near the knife edge to correspondingly penetrate through an edge A first hole positioning hole 301a and an edge A second hole positioning hole 301B on the edge A302, and enabling an edge B first hole positioning hole 301c and an edge B second hole positioning hole 301d on the edge B303 to fix the to-be-punched soft and hard combined plate PANEL structure on the lower die 20.

The upper die 10 is downwards punched and falls on the upper side of the to-be-punched soft and hard combined plate PANEL structure, the positioning guide posts 11 on the bottom surface of the upper die 10 are correspondingly inserted into the limiting holes 21 on the top surface of the lower die 20, so that a punching guide effect is realized, the punching needles 12 are inserted into and pulled out of the knife edges 22 after punching the waste edges of the to-be-punched soft and hard combined plate PANEL structure, and punching of the A edges and the B edges of the to-be-punched soft and hard combined plate PANEL structure waste edges is realized.

And 4.2, rotating the structure of the soft and hard combined plate PANEL to be punched by 180 degrees, punching the C edge 304 and the D edge 305, wherein the size of the punched PANEL edge is 4mm smaller than that of the blanking, the size tolerance is +/-0.1 mm, and four corners of the PANEL are all R2.0 rounded corners as shown by dotted lines in FIG. 7.

In order to guarantee the service life of a punching die and the tolerance of the edge size of the PANEL structure, the PANEL structure with the thickness of more than 0.4mm can be punched one sheet at a time, and the PANEL structure with the thickness of less than or equal to 0.4mm can be punched two sheets at a time.

Step five, PTH process; PTH means the plated through hole, which is used to plate a layer of thin copper on the hole wall of the original non-metal hole, i.e. the gold in the hole, so as to facilitate the subsequent copper plating to achieve the purpose of conducting the upper and lower layers.

Step six, a post-flow process; the later process is from electroplating to shipment, and the middle of the process comprises outer layer circuit etching, AOI, solder mask manufacturing, surface treatment, character silk-screen printing, electrical testing, routing, punching, FQC and the like.

Claims (8)

1. The utility model provides a die-cut mould on soft or hard combination board PANEL structure waste material limit which characterized in that: comprises an upper die (10) and a lower die (20) which are positioned above and below a soft and hard combined plate PANEL structure (300) to be punched; the bottom surface of the upper die (10) is provided with a punching needle (12) for punching a waste edge, and the top surface of the lower die (20) is provided with a knife edge (22) capable of accommodating the punching needle (12); the punching needle (12) is approximately L-shaped and comprises an X edge and a Y edge which are vertically connected through end parts, an arc section I (103) is arranged at the vertical connection position of the X edge and the Y edge, and an arc section II (104) which is in mirror symmetry with the arc section I (103) relative to the Y edge (102) is arranged at the position, close to the end part, of the free end of the X edge (101).

2. The die-cutting die for the waste edge of the PANEL of claim 1, wherein: the bottom surface of the upper die (10) is provided with a plurality of positioning guide pillars (11) with guiding function, and the top surface of the lower die (20) is provided with a plurality of limiting holes (21) capable of accommodating the positioning guide pillars (11).

3. The die-cutting die for the waste edge of the PANEL of claim 1, wherein: and at least two positioning pins (25) used for limiting the soft and hard combined plate PANEL structure (300) to be punched are arranged near the edge of each edge of the knife edge (22) on the top surface of the lower die (20).

4. The die-cutting die for the waste edge of the PANEL structure of any one of claims 1 to 3, wherein: the upper die (10) comprises a die head plate (13), a punching needle plate (14) and a stripper plate (15) which are sequentially stacked from top to bottom, and the punching needle (12) is fixed on the punching needle plate (14) and vertically penetrates through the stripper plate (15).

5. The die-cutting die for the waste edge of the PANEL structure of any one of claims 1 to 3, wherein: the lower die (20) comprises a bottom plate (23) and a knife edge plate (24) which are sequentially stacked from bottom to top.

6. The die-cutting die for the waste edge of the soft and hard combined plate PANEL structure according to claim 3, wherein: the number of the positioning needles (25) is four, and every two positioning needles are arranged at intervals along the length direction of each edge of the knife edge (22).

7. The die-cutting die for the waste edge of the PANEL of claim 6, wherein: the vertical distance between the positioning needle (25) and the adjacent edge of the knife edge (22) on the knife edge plate (24) is not less than 3.5 mm.

8. The die-cutting die for the waste edge of the PANEL structure of any one of claims 1 to 3, wherein: the upper die (10) and the lower die (20) are L-shaped.

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