CN106079353B - Co-extrusion die head for extruding profile with double conductive strips and extrusion method thereof - Google Patents

Abstract

A co-extrusion die head for extruding a profile with double conductive strips sequentially comprises a main runner plate (1), a support plate (2), a flow contracting plate (3), a first co-extrusion runner plate (4), a second co-extrusion runner plate (5) and a fixed-length forming plate (11), wherein a first co-extrusion runner communicated with a main runner (9) is formed between the first co-extrusion runner plate (4) and the second co-extrusion runner plate (5); two flow baffles are fixedly arranged in a first fan-shaped compression sub-runner and a first flat paving runner of the first co-extrusion runner; a fiber orientation device is adjustably arranged between the two flow baffles; and a second co-extrusion flow channel communicated with the main flow channel (9) is formed between the second co-extrusion flow channel plate (5) and the fixed-length forming plate (11) to form the conductive strip. The co-extrusion die head for extruding the section bar with the double conductive strips forms a composite layer of the two conductive strips separated by the middle insulator on the surface of the section bar through the first co-extrusion flow channel and the second co-extrusion flow channel, and orients the glass fiber along the extrusion length direction through the fiber orientation device to form a high-strength middle insulation layer which is not easy to fall off.

Description

A kind of extruding co-extrusion die with double conductive strip profiles and extrusion method thereof

technical field

The invention relates to the technical field of co-extrusion, in particular to a co-extrusion die head for extruding profiles with varying textures and an extrusion method thereof.

Background technique

The surface texture of the profile in the prior art cannot be formed at one time, and the surface coating technology is usually used, which not only increases the cost but also increases the coating equipment, and the coating of the film-coated profile does not have the effect of anti-oxidation and anti-ultraviolet rays, and its life is short , easy to fall off and change color. So some companies try to produce textured profiles with co-extrusion. Co-extrusion molding, as a main processing technology for composite material products, uses two or more extruders to bond several polymer materials with different characteristics together and shape them in one machine head to obtain composite materials. Material products. The co-extruded texture is also limited to linear textures, such as imitation wood grain profiles.

The extrusion of profiles with double conductive strips on the surface needs to design an insulating layer in the double conductive strips. The insulating layer between the double conductive strips in the prior art is easy to crack and peel, or even fall off, which is the main reason for the low quality. How to integrally form double conductive strips on the surface of the profile, and how to integrate the double conductive strips with the resin in between has become a manufacturing problem faced by enterprises in developing new products.

Contents of the invention

Aiming at the defects in the above-mentioned prior art, the object of the present invention is to provide a co-extrusion die head and an extrusion method for extruding a profile with double conductive strips.

The object of the present invention is achieved in this way, a kind of co-extrusion die head that extrudes has double conductive bar profile, comprises main channel plate, bracket plate, contracted flow plate, first co-extruded flow channel plate, second co-extruded flow channel in sequence channel plate and length forming plate, the main channel cavity is formed by the inner holes of the main channel plate, support plate, contracted flow plate, first co-extrusion channel plate, second co-extrusion channel plate and length forming plate. There is a positioning taper sleeve inside, and the splitter cone is positioned in the positioning taper sleeve to form a main channel in the space between the splitter cone and the main channel cavity;

A first co-extrusion flow channel communicated with the main flow channel is formed between the first co-extrusion flow channel plate and the second co-extrusion flow channel plate; the first co-extrusion flow channel includes sequentially connected first co-extrusion flow channels, The first co-extrusion runner, the first fan-shaped compression runner and the first tiled runner; the upper side of the first co-extrusion runner plate is provided with a first feed port, and the first feed port is connected to the first co-extrusion main flow road;

Two baffles are fixed in the first fan-shaped compression runner and the first tiled runner, one end of the baffle is flush with the top surface of the first fan-shaped compression runner, and the other end surface is exposed in the cavity for a length Equal to the thickness of the co-extruded layer; a fiber orientation device is adjustable between the two baffles;

A second co-extrusion flow channel communicated with the main flow channel is formed between the second co-extrusion flow channel plate and the cut-to-length forming plate; the second co-extrusion flow channel includes a second co-extrusion main flow channel, a second Co-extrusion runner I, second co-extrusion runner II, second fan-shaped compression runner and second tiled runner, second co-extrusion runner I, second co-extrusion runner II, second fan-shaped compression runner and the second flat flow channel are branched from the second co-extrusion main channel to two branch channels at a certain distance; the side of the second co-extrusion channel plate is provided with a second feed port, and the second feed port is connected to the second Co-extruded main channel.

Further, the fiber orientation device includes a fixed shaft, which is rotatably fixed on the two baffle plates; a plurality of rake teeth are fixed at equal intervals on the fixed shaft.

Further, the upper ends of the plurality of rake teeth are at the same distance from the bottom edge of the first co-extrusion runner, and the lower ends of the plurality of rake teeth are at the same distance from the top edge of the first tiled flow channel.

Further, the cross-section of the plurality of rake teeth is an inverted tapered shape with a large upper end and a smaller lower end.

Further, the plurality of rake teeth can rotate around the fixed shaft at a certain angle in the first fan-shaped compressed flow channel and the first tiled flow channel through the rotation of the fixed shaft.

Further, the splitter cone includes a splitter cone, a positioning cone and a core, and the positioning cone is provided with equal-section flow channels at even intervals on the surface of the cone; the positioning cone of the splitter fits in the positioning cone sleeve.

Further, the distance between the first co-extrusion channel and the second co-extrusion channel in the fluid extrusion direction along the main channel is 5-10 mm.

The extruding method of the co-extrusion die with double conductive strip profile comprises the steps:

1) Extrusion molding of the main body layer: prepare resin pellets, melt through the extruder and continuously extrude the main body layer through the co-extrusion die head;

2) In-mold composite of fiber-reinforced resin composite layer: use ordinary polymer pellets, mix in a certain length of glass fiber treated with coupling agent on-line after the polymer is plasticized and melted, and make the glass fiber and polymer melt Mix evenly, then enter the first feed port, and pass through the combing of multiple rakes when flowing through the first fan-shaped compression runner, so that the glass fibers are oriented along the extrusion length direction and bonded with the main body layer in the co-extruded composite layer. Bonded together to form a fiber-reinforced resin composite layer; when flowing through the first fan-shaped compression runner, it is blocked by a baffle, forming two conductive molding grooves in the composite layer;

3) In-mold compounding of conductive strips: Prepare conductive mud, which is continuously fed into the second feed port, and filled with conductive molding grooves at the end of the second co-extrusion tiled flow channel, and mixed with fiber reinforced resin on both sides In-mold bonding of composite layers to form conductive strips;

4) Length-forming: the main body layer, fiber-reinforced resin composite layer and conductive strip bonded together in the mold pass through the co-extrusion flow channel to length and extrude from the co-extrusion die head, cooling and forming.

Further, the metal conductive particles are mixed with an organic solvent, a dispersant, and a binder, and uniformly mixed to obtain the conductive mud.

Further, the metal conductive particles are Cu, Ag or Au powder.

The extruded co-extrusion die head with double conductive strip profiles achieves the co-extruded fiber-reinforced resin composite layer inlaid with conductive strips through the following special structural design:

1) The first co-extrusion runner and the second co-extrusion runner are arranged sequentially. During in-mold composite molding, the first co-extrusion runner is first set on the main runner to form a fiber-reinforced resin layer, and the middle of the fiber-reinforced resin layer is left There are two conductive forming grooves; then the second co-extruded flow channel is set to form the conductive strip, the second co-extruded flow channel just flows in the conductive forming groove, and is compounded and bonded with the molten fiber-reinforced resin in the mold to form a whole.

2) The fiber orientation of the resin layer between the two conductive strips, by setting a plurality of equally spaced rake teeth in the fan-shaped compression flow channel of the first co-extrusion flow channel, the fibers are oriented along the fluid flow direction of the main channel, and then enter the flat laying The flow channel enters the compound flow channel and is combined with the main layer;

The resin composite layer between the two conductive grooves of the first co-extruded flow channel is easy to fall off, and the fiber orientation of the rake teeth makes the fibers oriented along the length direction of the profile, which greatly enhances the strength of the resin layer between the conductive strips, and at the same time The conductive strip is more stable and durable, and the improvements in the two aspects promote each other, synergistically enhancing the bonding force between the conductive strip, the composite layer and the main layer.

The extruded co-extrusion die head with double conductive strip profiles forms a composite layer of two conductive strips separated by an intermediate insulator on the surface of the profile through the first co-extrusion flow channel and the second co-extrusion flow channel, and in order to strengthen the inter-insulator Strength, using glass fiber reinforced material, and through the carding of multiple rake teeth in the first fan-shaped compression runner, the glass fiber is oriented along the extrusion length direction to form a high-strength intermediate insulating layer that is not easy to fall off.

Description of drawings

Fig. 1 is a front sectional view of a co-extrusion die head extruding a profile with double conductive strips according to the present invention.

Fig. 2 is an A-A cross-sectional view of a co-extrusion die head extruding a profile with double conductive strips according to the present invention.

Fig. 3 is a B-B cross-sectional view of a co-extrusion die head extruded with double conductive strip profiles according to the present invention.

Fig. 4 is a main sectional view of a conductive profile extruded by a co-extrusion die with double conductive strip profiles according to the present invention.

Reference numerals in the above figures:

1 Main channel plate, 2 Bracket plate, 3 Constrictor plate, 3.1 Slide rail, 4 First co-extruded runner plate, 5 Second co-extruded runner plate, 6 Positioning taper sleeve, 6.1 Equal section runner, 7 Splitter cone , 8 main channel cavity, 9 main channel, 10 runner back slider, 11 fixed length forming plate, 12 runner baffle, 13 fixed shaft, 14 rake teeth

41 The first feed inlet, 42 The first main channel, 43 The first sub-runner, 44 The first fan-shaped compression sub-runner, 45 The first tiled runner

51 The second feed port, 52 The second main channel I, 53 The second main channel II, 54 The second sub-runner, 55 The second fan-shaped compression sub-runner, 56 The first tiled runner

7.1 Splitter cone, 7.2 Positioning cone, 7.3 Core

9.1 Divided runners, 9.2 Compressed runners, 9.3 Inner layer cut-to-length runners, 9.4 Co-extruded cut-to-length runners

10.1 chute, 10.2 front, 10.3 diversion groove

100 double conductive strip profiles, 101 main body layer, 102 fiber reinforced resin composite layer, 103 conductive strips

Detailed ways

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but they are not used to limit the scope of the present invention.

As shown in the figure, a co-extrusion die head extruding with double conductive strip profiles sequentially includes a main flow channel plate 1, a bracket plate 2, a contracted flow plate 3, a first co-extrusion flow channel plate 4, and a second co-extrusion flow plate Channel plate 5 and length forming plate 11, inner hole of main channel plate 1, bracket plate 2, contraction plate 3, first co-extrusion flow channel plate 4, second co-extrusion flow channel plate 5 and length forming plate 11 The main channel cavity 8 is formed; the positioning cone sleeve 6 is arranged in the support plate 2, and the splitter cone 7 includes a splitter cone 7.1, a positioning cone 7.2 and a core 7.3, and the positioning cone 7.2 is evenly spaced on the surface of the cone. Runner. Or the surface of the inner hole of the positioning taper sleeve 6 is evenly spaced with equal cross-section flow channels 6.1. The positioning cone part of the splitter cone 7 fits in the positioning taper sleeve 6 , and the space between the splitter cone 7 and the main channel cavity 8 is the main channel 9 . The main flow channel sequentially includes a split flow channel 9.1, a compression flow channel 9.2, an inner layer fixed-length flow channel 9.3 and a co-extrusion fixed-length flow channel 9.4.

Between the first co-extrusion flow channel plate 4 and the second co-extrusion flow channel plate 5, a first co-extrusion flow channel communicating with the inner layer fixed-length flow channel 9.3 is formed. A co-extrusion main channel 42, a first co-extrusion sub-runner 43, a first fan-shaped compression sub-runner 44, and a first tiled runner 45; a first feed inlet 41 is provided on the upper side of the first co-extrusion runner plate 4 , the first feed port 41 communicates with the first co-extrusion main channel 42; the first co-extrusion sub-channel 43 expands to both sides of the cavity, and passes through the first fan-shaped compression sub-channel 44, the first tiled channel 45 and the main channel 9 connected. In order to reserve space for the second co-extruded flow channel, two baffles 12 are fixed in the first fan-shaped compression runner 44 and the first tiled runner 45, and one end of the baffle is connected to the first fan-shaped compression runner. The top surface of the road 44 is flush, and the length of the other end surface exposed in the cavity is equal to the thickness of the co-extrusion layer. A fiber orientation device is adjustable between the two baffles 12. The fiber orientation device includes a fixed shaft 13 on which a plurality of rake teeth 14 are fixed at equal intervals. The distance between the upper end and the bottom edge of the first co-extrusion runner 43 is the same, the distance between the lower end of the plurality of rake teeth and the top edge of the first tiled flow channel 45 is the same, and the cross section of the plurality of rake teeth is larger than the upper end and the lower end Small inverted cone. The plurality of rake teeth can rotate around the fixed shaft at a certain angle in the first fan-shaped compressed flow channel 44 and the first tiled flow channel 45 through the rotation of the fixed shaft 13 .

Between the second co-extrusion flow channel plate 5 and the fixed-length forming plate 11, a second co-extrusion flow channel communicating with the inner layer fixed-length flow channel 9.3 is formed. The main channel 52, the second co-extrusion runner I 53, the second co-extrusion runner II 54, the second fan-shaped compression runner 55 and the second tile runner 56, the second co-extrusion runner I 53, the second co-extrusion runner The extrusion runner II 54 , the second fan-shaped compression runner 55 and the second tiled runner 56 are separated from the second co-extrusion main runner 52 into two runners separated by a certain distance. The second co-extrusion main channel 52 is connected to the second feed port 51 . The side of the second co-extrusion channel plate 5 is provided with a second feed port 51 , and the second feed port communicates with the second co-extrusion main channel 52 .

The distance between the first co-extrusion channel and the second co-extrusion channel along the fluid extrusion direction of the main channel 9 is 5-10 mm.

A method for extruding a co-extrusion die with double conductive strip profiles, comprising the steps of:

1) Extrusion molding of the main body layer: prepare resin granules, melt through the extruder and continuously extrude the main body layer 101 through the co-extrusion die;

2) In-mold composite of fiber-reinforced resin composite layer: use ordinary polymer pellets, mix in a certain length of glass fiber treated with coupling agent on-line after the polymer is plasticized and melted, and make the glass fiber and polymer melt Mix evenly, then enter the first feed port, and pass through the combing of multiple rakes when flowing through the first fan-shaped compression runner 44, so that the glass fibers are oriented along the extrusion length direction, and compounded with the main layer in the co-extruded composite layer bonded together to form a fiber-reinforced resin composite layer 102; when flowing through the first fan-shaped compression runner 44, it is blocked by the baffle 12, forming two conductive molding grooves in the composite layer;

3) In-mold compounding of conductive strips: Prepare conductive mud, which is continuously fed into the second feed port, and filled with conductive molding grooves at the end of the second co-extrusion tiled flow channel, and mixed with fiber reinforced resin on both sides The composite layer 102 is bonded in the mold to form a conductive strip 103;

4) Length forming: The main body layer (101), fiber reinforced resin composite layer 102 and conductive strip 103 bonded together in the mold pass through the co-extrusion length-to-length flow channel 9.4 to length and extrude from the co-extrusion die head, Cool and shape.

For the extrusion molding of the short fiber reinforced lengthwise oriented resin layer between the two conductive strips, ordinary polymer pellets are used, and a certain length of glass fiber treated with a coupling agent is mixed in-line after the polymer is plasticized and melted And make the glass fiber and polymer melt evenly mixed, then enter the first feed port, and pass through the combing of multiple rake teeth when flowing through the first fan-shaped compression runner 44, so that the glass fiber is oriented along the extrusion length direction. The co-extruded compound layer is compounded and bonded with the second co-extruded runner. When flowing through the first fan-shaped compression runner 44, it is blocked by the baffle plate 12, forming two conductive molding grooves in the composite layer;

For the extrusion molding of conductive strips, prepare metal conductive particles mixed with organic solvents, dispersants, and binders, and mix uniformly to obtain conductive mud, conductive particles such as Cu, Ag, and Au powders. The feed material in the second co-extrusion flow channel is the conductive mud material, and the conductive mud material within 5-10 mm length after the formation of the conductive forming groove is filled into the conductive forming groove, and a certain thickness is formed on the surface of the profile through the inner layer fixed-length flow channel 9.3 and width of two conductive strips.

Preferably, the thickness of the composite layer is 1-3 mm, and the width of the conductive strip is 3-8 mm.

The extruded co-extrusion die head with double conductive strip profiles forms a composite layer of two conductive strips separated by an intermediate insulator on the surface of the profile through the first co-extrusion flow channel and the second co-extrusion flow channel, and in order to strengthen the inter-insulator Strength, using glass fiber reinforced material, and through the carding of multiple rake teeth in the first fan-shaped compression runner, the glass fiber is oriented along the extrusion length direction to form a high-strength intermediate insulating layer that is not easy to fall off.

Claims (9)

1. A co-extrusion die head with double conductive strip profiles is extruded, comprising a main flow channel plate (1), a support plate (2), a contraction plate (3), the first co-extruded flow channel plate (4), The second co-extruded flow channel plate (5) and the cut-to-length forming plate (11), the main flow channel plate (1), the bracket plate (2), the contracted flow plate (3), the first co-extruded flow channel plate (4), The inner hole of the second co-extruded flow channel plate (5) and the fixed-length forming plate (11) forms the main channel cavity (8), and it is characterized in that, A positioning taper sleeve (6) is arranged inside the bracket plate (2), and the splitter cone (7) is positioned in the positioning taper sleeve (6). The space forms the main channel (9); Between the first co-extrusion flow channel plate (4) and the second co-extrusion flow channel plate (5), a first co-extrusion flow channel communicating with the main channel (9) is formed; the first co-extrusion flow channel includes sequentially The first co-extrusion main channel (42), the first co-extrusion runner (43), the first fan-shaped compression runner (44) and the first tiling runner (45) communicated; the first co-extrusion runner plate ( 4) The upper side is provided with a first feed port (41), and the first feed port (41) is connected to the first co-extrusion main channel (42); Two baffles (12) are fixedly installed in the first fan-shaped compression runner (44) and the first tiled runner (45), and one end of the baffle is connected to the top of the first fan-shaped compression runner (44). The surface is flush, and the length of the other end surface exposed in the cavity is equal to the thickness of the co-extrusion layer; a fiber orientation device is adjustable between the two baffles (12); Between the second co-extrusion flow channel plate (5) and the length forming plate (11), form the second co-extrusion flow channel communicated with the main flow channel (9); the second co-extrusion flow channel includes sequentially connected The second co-extrusion main channel (52), the second co-extrusion sub-channel I (53), the second co-extrusion sub-channel II (54), the second fan-shaped compression sub-channel (55) and the second flat flow channel (56 ), the second co-extrusion runner I (53), the second co-extrusion runner II (54), the second fan-shaped compression runner (55) and the second flat runner (56) from the second co-extrusion runner (52) Branch out two runners at a certain distance; the side of the second co-extrusion flow channel plate (5) is provided with a second feed port (51), and the second feed port is connected to the second co-extrusion main channel ( 52); The fiber orientation device includes a fixed shaft (13), which is rotatably fixed on the two baffles (12); on the fixed shaft (13), a plurality of rake teeth (14) are fixed at equal intervals . 2. extrusion as claimed in claim 1 has the co-extrusion die head of double conductive strip profile, it is characterized in that, the upper end distance of the first co-extrusion shunt (43) of the upper end of the plurality of rake teeth is the same, so The lower ends of the plurality of rake teeth are at the same distance from the top edge of the first tiled flow channel (45). 3. Extruding the co-extrusion die head with double conductive strip profiles as claimed in claim 1, wherein the cross-section of the plurality of rake teeth is an inverted tapered shape with a large upper end and a smaller lower end. 4. Extrude the co-extrusion die with double conductive strip profiles as claimed in claim 1, characterized in that, the plurality of rake teeth can compress the runners (44) in the first sector by the rotation of the fixed shaft (13) Rotate a certain angle around the fixed axis in the first tiled runner (45). 5. Extrude the co-extrusion die with double conductive strip profiles as claimed in claim 1, characterized in that the splitter cone (7) comprises a splitter cone (7.1), a positioning cone (7.2) and a core (7.3) , the positioning cone (7.2) is evenly spaced on the surface of the cone with equal cross-section runners (7.4); the positioning cone of the divider cone (7) fits in the positioning taper sleeve (6). 6. extrude as claimed in claim 1 and have the co-extrusion die head of double conductive bar section bar, it is characterized in that, described first co-extrusion runner is apart from the distance between the second co-extrusion runner along the main channel (9) The separation distance in the fluid extrusion direction is 5-10mm. 7. Extrude the extrusion method of the co-extrusion die head that has double conductive strip profile as any one of claim 1-6, it is characterized in that, comprises the steps: 1) Extrusion molding of the main body layer: prepare resin pellets, melt through the extruder and continuously extrude the main body layer through the co-extrusion die head; 2) In-mold composite of fiber-reinforced resin composite layer: use ordinary polymer pellets, mix in a certain length of glass fiber treated with coupling agent on-line after the polymer is plasticized and melted, and make the glass fiber and polymer melt Mix evenly, then enter the first feed inlet, and pass through the combing of multiple rake teeth when flowing through the first fan-shaped compression runner (44), so that the glass fibers are oriented along the extrusion length direction, and in the co-extruded composite layer and the main body The layers are bonded together to form a fiber-reinforced resin composite layer (102); when flowing through the first fan-shaped compression runner (44), it is blocked by the baffle (12), forming two conductive molding grooves in the composite layer; 3) In-mold compounding of conductive strips: Prepare conductive mud, which is continuously fed into the second feed port, and filled with conductive molding grooves at the end of the second co-extrusion tiled flow channel, and mixed with fiber reinforced resin on both sides The composite layer (102) is bonded in the mold to form a conductive strip (103); 4) Size forming: the main body layer (101), fiber reinforced resin composite layer (102) and conductive strip (103) bonded together in the mold are cut to length through the co-extrusion flow channel (9.4) Extruded by the extrusion die head, cooled and formed. 8. as claimed in claim 7, extrude the method for extruding the co-extrusion die with double conductive strip profile, it is characterized in that metal conductive particle mixes organic solvent, dispersant, binding agent, evenly mixes and obtains described conductive slime material. 9. The extrusion method of extruding a co-extrusion die with double conductive strip profiles as claimed in claim 8, wherein the metal conductive particles are Cu, Ag or Au powder.