CN211251393U - Impregnation die for thermoplastic continuous fiber belt - Google Patents
Impregnation die for thermoplastic continuous fiber belt Download PDFInfo
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- CN211251393U CN211251393U CN201922233733.0U CN201922233733U CN211251393U CN 211251393 U CN211251393 U CN 211251393U CN 201922233733 U CN201922233733 U CN 201922233733U CN 211251393 U CN211251393 U CN 211251393U
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Abstract
The utility model discloses a dipping die of thermoplastic continuous fiber belt, including dipping die head and upper and lower drench membrane die head. The impregnation die head comprises a lower die and a lower die; the upper die comprises an upper die plate, an upper die core and an upper heating plate; the bottom surface of the upper mold core is a wavy dipping surface; the lower die comprises a lower die plate, a lower die core and a lower heating plate, the top surface of the lower die core is a wavy dipping surface matched with the dipping surface of the upper die core, and the upper die core and the lower die core are buckled to form a dipping cavity. The discharging channels in the upper and lower film-spraying die heads are vertical to the fiber bundles entering the impregnation die cavity and are in a drop shape with the width being narrowed in the middle; the head of the upper laminating die head is close to the upper surface of the fiber bundle; the head of the lower film-spraying die head extends into the gap of the lower die and is close to the lower surface of the fiber bundle, and the head of the lower film-spraying die head is provided with a storage tank communicated with the discharge channel. The utility model discloses an impregnation die enables hot melt resin dispersion comparatively even on the continuous fiber area, can obtain abundant flooding.
Description
Technical Field
The utility model relates to a dipping die of thermoplasticity continuous fiber area.
Background
Continuous Fiber reinforced thermoplastic Composites CFRTP (continuous Fiber reinforced thermoplastic Composites panels) is a novel composite material with high strength, high rigidity and high toughness, which is manufactured by using continuous fibers as a reinforcing material and thermoplastic resin as a matrix through a special process. As the reinforcing fiber of the continuous fiber reinforced thermoplastic composite material is continuous, the mechanical property of the continuous fiber reinforced thermoplastic composite material is far higher than that of a long fiber reinforced thermoplastic composite material, and the continuous fiber reinforced thermoplastic composite material has the advantages of light weight, corrosion resistance, good water resistance and the like, and is often applied to the fields of automobile, airplane, pipeline manufacturing and the like.
At present, the industrial production of continuous fiber reinforced thermoplastic composites is dominated by melt impregnation. The technological process includes leading continuous fiber tow into one soaking mold head with special structure under tension, soaking the soaking mold head with hot melt resin from the extruder, drawing out from the mold head, cooling and cutting into required length. Because the melt viscosity of the thermoplastic is high and the wettability is poor, the fiber tows are not easy to be soaked and wrap each single filament. How to promote the plastic melt to infiltrate the fibers and fully contact the fibers, so that the fibers are not damaged in the impregnation process, and the method is the primary condition for producing the CFRTP by the melt impregnation method. The prior continuous fiber reinforced thermoplastic composite material has the following problems that 1, the interface contact of an impregnation mould is less, and the impregnation is incomplete; 2. the hot melt resin is discharged unevenly, and the phenomena of poor fiber impregnation and yarn drying are easy to occur; 3. in the impregnation process, the hot-melt resin is influenced by gravity, and bubbles or impurities are easy to appear in the fiber belt, so that the content of the resin on the fiber belt is not uniform; 4. the impregnated fiber tape has poor tensile strength and tension.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's defect and provide a thermoplastic continuous fiber area's flooding mould, it enables hot melt resin dispersion comparatively even on continuous fiber area, can obtain abundant flooding.
The purpose of the utility model is realized like this: an impregnation die for a thermoplastic continuous fiber belt comprises an impregnation die head, an upper film-coating die head and a lower film-coating die head; wherein the content of the first and second substances,
the impregnation die head comprises an upper die and a lower die; the upper die comprises an upper die plate, an upper die core fixed on the bottom surface of the upper die plate and an upper heating plate arranged on the top surface of the upper die plate; the bottom surface of the upper mold core is a wavy impregnation surface; the lower die comprises a lower die plate, a lower die core fixed on the top surface of the lower die plate and a lower heating plate arranged on the bottom surface of the lower die plate, the top surface of the lower die core is a wavy impregnation surface matched with the impregnation surface of the upper die core, and the upper die core and the lower die core are buckled to form an impregnation cavity; the outlet end of the lower template is hinged with the outlet end of the upper template; a gap is arranged at the inlet end of the lower die;
the upper film laminating die head and the lower film laminating die head are both arranged at the inlet side of the impregnation die head and are connected to the discharge ends of the two extruders in a one-to-one correspondence manner; the upper film-spraying die head and the lower film-spraying die head respectively comprise an inner die body and an outer die body, the rear ends of the inner die body and the outer die body are fixed on the base, the outer side surface of the front part of the inner die body and the outer side surface of the front part of the outer die body are inclined planes, a groove is formed in the outer side surface of the front part of the outer die body, a die lip is formed between the groove and the head part of the outer die body, a discharge channel vertical to a fiber bundle entering the impregnation die cavity is formed by a gap between the inner side surface of the inner die body and the inner side surface of; the outer die bodies of the upper and lower film-spraying die heads are respectively provided with a discharging thickness fine-adjustment mechanism, and the discharging thickness fine-adjustment mechanism comprises a fine-adjustment block fixed on the rear side surface of the groove and a fine-adjustment screw inserted into a through hole formed in the outer die body and in threaded connection with the fine-adjustment block; the end surface of the head part of the upper laminating die head is close to the upper surface of the fiber bundle; the head of the lower film-spraying die head extends into the notch of the lower die, the end face of the head is close to the lower surface of the fiber bundle, and a storage tank communicated with the discharge channel is arranged on the end face of the head of the inner die body of the lower film-spraying die head.
The impregnation die for the thermoplastic continuous fiber belt is characterized in that the impregnation die head is horizontally arranged or obliquely arranged, and the oblique angle is 5-30 degrees; go up the mould and realize opening and shutting with the lower mould through the cylinder, open the angle and be 5 ~ 60.
In the impregnation die for the thermoplastic continuous fiber belt, the heating rods are respectively arranged on two sides of the discharge channel in the upper and lower laminating die heads.
The utility model discloses a dipping die in thermoplasticity continuous fiber area has following characteristics:
1. the wavy impregnation surfaces of the upper mold core and the lower mold core of the impregnation die head are designed, so that the contact interface of the continuous fiber belt in the impregnation process is increased, and the friction tension on each part of the continuous fiber belt is the same, so that the hot-melt resin is uniformly dispersed on the continuous fiber belt, and the continuous fiber belt can be fully impregnated;
2. the double-sided coating design is adopted, the storage tank is arranged on the lower film spraying die head, when the upper film spraying die head 3 sprays hot-melt resin on the upper surface of the fiber bundle, the storage tank of the lower film spraying die head can supply a supplementary film to the lower surface of the fiber bundle, the upper surface and the lower surface of the fiber bundle are ensured to be fully impregnated with the resin, and the two sides of the continuous fiber belt can be uniformly impregnated with the hot-melt resin;
3. the impregnation die head is provided with a heating plate for heating, and heating rods are arranged in the upper film spraying die head and the lower film spraying die head respectively, so that the hot-melt resin entering the impregnation cavity is always in a hot-melt state, and the hot-melt resin is dispersed on the fiber bundle more uniformly to obtain sufficient impregnation.
Drawings
FIG. 1 is a longitudinal cross-sectional view of an impregnation die for thermoplastic continuous fiber tapes of the present invention;
fig. 2 is a partial longitudinal sectional view of an upper lamination die in an impregnation die for thermoplastic continuous fiber tapes according to the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1 and 2, the utility model discloses an impregnation die for thermoplastic continuous fiber belt, which comprises an impregnation die head, an upper film-coating die head 3 and a lower film-coating die head 4.
The impregnation die head comprises a lower die 1 and a lower die 2; wherein, the upper die 1 comprises an upper die plate 10, an upper die core 11 fixed on the bottom surface of the upper die plate 10 and an upper heating plate 12 arranged on the top surface of the upper die plate 10; the bottom surface of the upper mold core 11 is a wavy dipping surface, and the wave crests and the wave troughs are different and can be from deep to shallow, from shallow to deep or as deep; the lower die 2 comprises a lower template 20, a lower die core 21 fixed on the top surface of the lower template 20 and a lower heating plate 22 arranged on the bottom surface of the lower template 20, the top surface of the lower die core 21 is a wavy impregnation surface matched with the impregnation surface of the upper die core 11, and the upper die core 11 and the lower die core 21 are buckled to form an impregnation cavity; the outlet end of the lower template 20 is hinged with the outlet end of the upper template 10; the inlet end of the lower die 2 is provided with a gap. The dipping die head can be horizontally placed or obliquely placed, and the oblique placement angle is 5-30 degrees; go up mould 1 and realize opening and shutting with lower mould 2 through the cylinder, open angle alpha is 5 ~ 60, can conveniently clear up the waste material and arrange in order the tow.
The upper film laminating die head 3 and the lower film laminating die head 4 are both arranged at the inlet side of the impregnation die head and are connected to the discharge ends of the two extruders in a one-to-one correspondence manner; the upper film-spraying die head 3 and the lower film-spraying die head 4 both comprise an inner die body 32 and an outer die body 33, the rear ends of which are fixed on the base, the outer side surface of the front part of the inner die body 32 and the outer side surface of the front part of the outer die body 33 are inclined planes, a groove 34 is formed on the outer side surface of the front part of the outer die body 32, a die lip is formed between the groove 34 and the head part of the outer die body 33, discharge channels 30 and 40 which are vertical to a fiber bundle entering the impregnation die cavity are formed by a gap between the inner side surface of the inner die body 32 and the inner side surface of the outer die body 33, and the middle parts of the discharge; the outer die bodies 33 of the upper film laminating die head 3 and the lower film laminating die head 4 are respectively provided with a discharging thickness fine adjustment mechanism, and the discharging thickness fine adjustment mechanism comprises a fine adjustment block 35 fixed on the rear side surface of the groove 34 and a fine adjustment screw 36 inserted into a through hole formed in the outer die body 33 and in threaded connection with the fine adjustment block 35; the end surface of the head part of the upper laminating die head 3 is close to the upper surface of the fiber bundle 50; the head of the lower film-spraying die head 4 extends into the gap of the lower die, the end surface of the head is close to the lower surface of the fiber bundle 50, and a storage tank 40a communicated with the discharging channel 40 is arranged on the end surface of the head of the inner die body 32 of the lower film-spraying die head 4.
The utility model discloses a dipping die of thermoplasticity continuous fiber area's characteristics are:
the width of the dipping die head is 100-2000 mm, and the thickness of a dipped product is 0.1-0.3 mm; the impregnating resin is PP polypropylene, PA polyamide or PEEK polyether ether ketone. The impregnated fiber is selected from glass fiber, carbon fiber, aramid fiber or basalt fiber. Solves the problem of single property of only producing one resin and one fiber.
The upper die 1 and the lower die 2 are both provided with wavy impregnation surfaces, the impregnation surfaces of the upper die 1 and the lower die 2 are correspondingly arranged, and wave crests of the impregnation surfaces are staggered, so that a contact interface is large when the continuous fiber bundle 50 is impregnated, meanwhile, friction tension borne by each part of the continuous fiber bundle 50 is the same, the two extruders coat the extruded hot melt resin on the upper surface and the lower surface of the fiber bundle 50 through the upper film coating die head 3 and the lower film coating die head 4, and because the material storage tank 40a is arranged on the lower film coating die head 4, when the upper film coating die head 3 coats the hot melt resin on the upper surface of the fiber bundle 50, the material storage tank 40a of the lower film coating die head 4 can supply the film on the lower surface of the fiber bundle 50, so that the upper surface and the lower surface of the fiber bundle 50 are fully impregnated with the resin. The upper film laminating die head 3 and the lower film laminating die head 4 are both provided with a discharging thickness fine adjustment mechanism, the fine adjustment screw 36 is rotated until the fine adjustment screw 36 slightly contacts with the front side surface of the groove 34, the groove 34 is formed in the outer side surface of the front part of the outer die body 33, the wall thickness between the bottom surface of the groove 34 and the inner side surface of the outer die body 33 is thinned, when the fine adjustment screw 36 contacts with the front side surface of the groove 34, the die lip can slightly swing inwards, and then the gap between the die lip and the end head of the inner die body 32 is adjusted, so that the discharging thickness of the hot melt resin can be adjusted, and material leakage can be prevented. In addition, the upper die 1 and the lower die 2 are respectively provided with a copper casting heating plate for heating the upper die 1 and the lower die 2, the temperature can reach 200-400 ℃, so that the impregnation cavity is always kept at a proper temperature, and heating rods are arranged in the upper film-spraying die head 3 and the lower film-spraying die head 4, so that the hot-melt resin entering the impregnation cavity is always in a hot-melt state, and the hot-melt resin is dispersed on the fiber bundle 50 more uniformly to obtain sufficient impregnation.
The above embodiments are provided only for the purpose of illustration, not for the limitation of the present invention, and those skilled in the relevant art can make various changes or modifications without departing from the spirit and scope of the present invention, therefore, all equivalent technical solutions should also belong to the scope of the present invention, and should be defined by the claims.
Claims (3)
1. An impregnation die for a thermoplastic continuous fiber belt comprises an impregnation die head, an upper film-coating die head and a lower film-coating die head; it is characterized in that the preparation method is characterized in that,
the impregnation die head comprises an upper die and a lower die; the upper die comprises an upper die plate, an upper die core fixed on the bottom surface of the upper die plate and an upper heating plate arranged on the top surface of the upper die plate; the bottom surface of the upper mold core is a wavy impregnation surface; the lower die comprises a lower die plate, a lower die core fixed on the top surface of the lower die plate and a lower heating plate arranged on the bottom surface of the lower die plate, the top surface of the lower die core is a wavy impregnation surface matched with the impregnation surface of the upper die core, and the upper die core and the lower die core are buckled to form an impregnation cavity; the outlet end of the lower template is hinged with the outlet end of the upper template; a gap is arranged at the inlet end of the lower die;
the upper film laminating die head and the lower film laminating die head are both arranged at the inlet side of the impregnation die head and are connected to the discharge ends of the two extruders in a one-to-one correspondence manner; the upper film-spraying die head and the lower film-spraying die head respectively comprise an inner die body and an outer die body, the rear ends of the inner die body and the outer die body are fixed on the base, the outer side surface of the front part of the inner die body and the outer side surface of the front part of the outer die body are inclined planes, a groove is formed in the outer side surface of the front part of the outer die body, a die lip is formed between the groove and the head part of the outer die body, a discharge channel vertical to a fiber bundle entering the impregnation die cavity is formed by a gap between the inner side surface of the inner die body and the inner side surface of; the outer die bodies of the upper and lower film-spraying die heads are respectively provided with a discharging thickness fine-adjustment mechanism, and the discharging thickness fine-adjustment mechanism comprises a fine-adjustment block fixed on the rear side surface of the groove and a fine-adjustment screw inserted into a through hole formed in the outer die body and in threaded connection with the fine-adjustment block; the end surface of the head part of the upper laminating die head is close to the upper surface of the fiber bundle; the head of the lower film-spraying die head extends into the notch of the lower die, the end face of the head is close to the lower surface of the fiber bundle, and a storage tank communicated with the discharge channel is arranged on the end face of the head of the inner die body of the lower film-spraying die head.
2. The impregnation die for the thermoplastic continuous fiber tape according to claim 1, wherein the impregnation die head is horizontally disposed or obliquely disposed at an angle of 5 to 30 °; go up the mould and realize opening and shutting with the lower mould through the cylinder, open the angle and be 5 ~ 60.
3. The impregnation die for the thermoplastic continuous fiber tape according to claim 1, wherein the upper and lower lamination dies are further provided with heating rods inside thereof on both sides of the discharge passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922233733.0U CN211251393U (en) | 2019-12-12 | 2019-12-12 | Impregnation die for thermoplastic continuous fiber belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922233733.0U CN211251393U (en) | 2019-12-12 | 2019-12-12 | Impregnation die for thermoplastic continuous fiber belt |
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| Publication Number | Publication Date |
|---|---|
| CN211251393U true CN211251393U (en) | 2020-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922233733.0U Active CN211251393U (en) | 2019-12-12 | 2019-12-12 | Impregnation die for thermoplastic continuous fiber belt |
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| CN (1) | CN211251393U (en) |
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- 2019-12-12 CN CN201922233733.0U patent/CN211251393U/en active Active
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