CN110654041A - Novel wiper elastic sheet and preparation method thereof - Google Patents
Novel wiper elastic sheet and preparation method thereof Download PDFInfo
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- CN110654041A CN110654041A CN201910942853.XA CN201910942853A CN110654041A CN 110654041 A CN110654041 A CN 110654041A CN 201910942853 A CN201910942853 A CN 201910942853A CN 110654041 A CN110654041 A CN 110654041A
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- elastic sheet
- continuous
- wiper blade
- novel
- preparing
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/30—Moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/46—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/525—Component parts, details or accessories; Auxiliary operations
- B29C70/526—Pultrusion dies, e.g. dies with moving or rotating parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/305—Wipers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The application provides a preparation method of a novel wiper elastic sheet, which takes a continuous fiber aggregate as a reinforcement and a thermoplastic high polymer as a base body, and makes the continuous fiber aggregate pass through a die with a cavity through a pultrusion process, prepares the continuous elastic sheet under the traction of a drafting device, cuts the continuous elastic sheet according to the fixed length of a design requirement, and places the elastic sheet in a compression die for secondary heat setting to obtain the wiper elastic sheet with an arched radian in the length direction; the preparation method is simple in process and good in repeatability, and the performance of the wiper elastic sheet is superior to that of a stainless steel wiper elastic sheet.
Description
Technical Field
The invention relates to the field of resin-based composite materials, in particular to a novel wiper elastic sheet and a preparation method thereof.
Background
With the development of the automobile industry, the consumption of wiper elastic sheets is increasing, and especially in SUV vehicles, stainless steel wiper elastic sheets have the characteristics of excellent mechanical properties and high brightness, however, the stainless steel wiper elastic sheets are not resistant to salt spray corrosion, the manufacturing process is complex, the number of working procedures is large, the quality consistency problem is prominent, products often contain quality defects which are difficult to avoid, pollutants are discharged in the production process, and meanwhile, the stainless steel wiper elastic sheets or support bars cannot be repaired after being bent or broken, and the service life is limited.
Disclosure of Invention
Aiming at the problems, the invention provides a novel wiper spring and a preparation method thereof.
The purpose of the invention is realized by adopting the following technical scheme:
a preparation method of a novel wiper elastic sheet comprises the following steps:
s1, taking the continuous fiber aggregate as a reinforcement, taking a thermoplastic high molecular polymer as a matrix, and making the continuous fiber aggregate pass through a die with a cavity through a pultrusion process to prepare a continuous shrapnel under the traction of a drafting device;
s2, cutting the continuous elastic sheet according to the design requirement;
s3, carrying out secondary heat setting on the elastic sheet cut at fixed length, and placing the elastic sheet in a molding die for hot-press setting to obtain the wiper elastic sheet with an arched radian in the length direction;
preferably, the continuous fibers are continuous carbon fibers and/or glass fibers;
preferably, the thermoplastic high molecular polymer is thermoplastic polyurethane TPU or ABS or PP or PA6 or PA 66;
preferably, the volume content of the continuous fiber aggregate in the wiper elastic sheet is 65-90%;
preferably, the width of the continuous elastic sheet in S1 is 5-30mm, and the thickness is 0.4-1.2 mm; the length of the elastic piece cut at fixed length in the S2 is 450 mm and 900 mm;
preferably, the snake bend of the wiper elastic sheet along the width direction of the composite material elastic sheet within 1 meter length is less than 0.1 mm;
preferably, the molding temperature of the pultrusion process is 100-150 ℃;
preferably, the heat preservation temperature of the secondary heat setting is 100-150 ℃, the hot pressing pressure is 0.5-2MPa, and the heat preservation and pressure maintaining time is 2-20 min.
The invention has the beneficial effects that:
(1) the windscreen wiper elastic sheet made of the continuous fiber reinforced thermoplastic resin composite material has the characteristics of water resistance, salt mist resistance, corrosion resistance, good elasticity, good fatigue resistance and the like, can be used for replacing the existing stainless steel windscreen wiper elastic sheet or supporting strip in the windscreen wiper, can reduce weight by more than 30 percent, and more importantly, the preparation method has the advantages of simple process, good repeatability, no pollution in the production process, higher production rate, lower comprehensive cost than that of the stainless steel supporting strip elastic sheet with the same specification and good development prospect.
(2) Stainless steel windscreen wiper shell fragment or branch buckle, can not restore after the rupture, can only abandon, and this application novel windscreen wiper shell fragment have strong repairability, can pass through the fixed impaired shell fragment of small-size design anchor clamps, through heating re-design, can resume the performance of former shell fragment.
(3) The composite material flat sheet prepared by the pultrusion process has good axial extension degree and excellent surface quality, is in the shape of a section with equal thickness, equal width and equal cross section, and the truncation length can be made according to the design.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.
Fig. 1 is a schematic view of a mold structure having a cavity used in step S1;
fig. 2 is a schematic view of the molding die used in step S1.
Reference numerals: 10, mounting a mold; 20-lower mould; 30-a cavity; 40-a backing plate; 50-connecting bolts; 60-upper splint; 70-lower splint; 80-a female mold; 90-convex mold; A. the B points are two end points of the wiper elastic sheet.
Detailed Description
The invention is further described with reference to the following examples.
The embodiment of the application relates to a preparation method of a novel wiper elastic sheet, which comprises the following steps:
s1, taking the continuous fiber aggregate as a reinforcement, taking a thermoplastic high molecular polymer as a matrix, and making the continuous fiber aggregate pass through a die with a cavity through a pultrusion process to prepare a continuous shrapnel under the traction of a drafting device;
s2, cutting the continuous elastic sheet according to the design requirement;
s3, carrying out secondary heat setting on the elastic sheet cut at fixed length, and placing the elastic sheet in a molding die for hot-press setting to obtain the wiper elastic sheet with a permanent arched radian in the length direction;
the length, width, thickness, arch height and other specification parameters of the elastic sheet can be determined according to the design requirements;
the continuous fibers are continuous carbon fibers and/or glass fibers;
the thermoplastic high molecular polymer is thermoplastic polyurethane TPU or ABS or PP or PA6 or PA 66;
the volume content of the continuous fiber aggregate in the wiper elastic sheet is 65-90%;
the width of the continuous elastic sheet in the S1 is 5-30mm, and the thickness is 0.4-1.2 mm; the length of the elastic piece cut at fixed length in the S2 is 450 mm and 900 mm;
the snake bend of the wiper elastic sheet along the width direction of the composite material elastic sheet within 1 meter length is less than 0.1 mm;
the molding temperature of the pultrusion process is 100-150 ℃, and the production speed is 2-8 m/min;
the heat preservation temperature of the secondary heat setting is 100-.
The mold with the cavity used in the step S1 is composed of an upper mold, a lower mold, a cavity, a pad, an upper clamp plate, a lower clamp plate and a connecting bolt, wherein the upper mold and the lower mold are assembled and arranged between the upper clamp plate and the lower clamp plate connected by the connecting bolt for fastening, a groove is arranged on one surface of the upper mold, which is matched with the lower mold, and the cross section of the groove is concave, the pad is fixed on the matched surface of the lower mold, and the cavity is formed by the pad and the groove space of the upper mold.
The molding die used in the above step S3 is composed of a female die and a male die.
Example 1
A preparation method of a novel wiper elastic sheet comprises the following steps:
s1, taking continuous carbon fibers as a reinforcement, taking Thermoplastic Polyurethane (TPU) as a resin matrix, heating and melting polyurethane resin in a resin tank, heating the continuous carbon fibers at the temperature of 100-130 ℃, passing the continuous carbon fibers through the resin tank and completely impregnating the continuous carbon fibers with the resin, enabling the continuous fiber aggregate to pass through a heated mold (110-130 ℃) with a cavity through a pultrusion process, demolding under the traction action of a drafting device, cooling by high-speed flowing air to prepare a continuous shrapnel, wherein the width of the shrapnel is 10mm, and the thickness of the shrapnel is 0.6 mm;
s2, cutting the continuous elastic sheet according to the fixed length required by the design, wherein the length of the elastic sheet is 700 mm;
s3, carrying out secondary heat setting on the elastic sheet cut at fixed length, placing the elastic sheet in a mould with an arched radian in the middle for hot-press setting, wherein the heat preservation temperature is 120 ℃, the hot-press pressure is 0.8MPa, and the heat preservation and pressure maintaining time is 10min, so as to obtain the wiper elastic sheet with a permanent arched radian in the thickness direction, and the heat resistance is-55-210 ℃.
Example 2
A preparation method of a novel wiper elastic sheet comprises the following steps:
s1, taking continuous glass fiber as a reinforcement, taking Thermoplastic Polyurethane (TPU) as a resin matrix, heating and melting polyurethane resin in a resin tank at the heating temperature of 100-120 ℃, allowing the continuous glass fiber to pass through the resin tank and be completely impregnated by the resin, allowing a continuous fiber aggregate to pass through a heated mold (130 ℃) with a cavity through a pultrusion process, demolding under the traction action of a drafting device, cooling by high-speed flowing air to prepare a continuous shrapnel, wherein the width of the shrapnel is 6mm, and the thickness of the shrapnel is 0.8 mm;
s2, cutting the continuous elastic sheet according to the design requirement, wherein the length of the elastic sheet is 600 mm;
s3, carrying out secondary heat setting on the elastic sheet cut at fixed length, placing the elastic sheet in a mould with an arched radian in the middle for hot-press setting, wherein the heat preservation temperature is 120 ℃, the hot-press pressure is 0.8MPa, and the heat preservation and pressure maintaining time is 8min, so as to obtain the wiper elastic sheet with a permanent arched radian in the thickness direction, and the heat resistance is-55-210 ℃.
Example 3
A preparation method of a novel wiper elastic sheet comprises the following steps:
s1, taking continuous carbon fibers and glass fibers as reinforcement bodies, taking the glass fibers as flat cores, wrapping the carbon fibers outside the glass fibers, taking Thermoplastic Polyurethane (TPU) as a resin matrix, heating and melting polyurethane resin in a resin tank, heating the polyurethane resin at the temperature of 100 ℃ and 120 ℃, enabling the continuous reinforcement fibers to pass through the resin tank and be completely impregnated by the resin, enabling a continuous fiber aggregate to pass through a heated mold (130 ℃) with a cavity through a pultrusion process, demolding under the traction action of a traction device, cooling through high-speed flowing air to prepare a continuous elastic sheet, wherein the width of the elastic sheet is 12mm, and the thickness of the elastic sheet is 1.0 mm;
s2, cutting the continuous elastic sheet according to the design requirement, wherein the length of the elastic sheet is 800 mm;
s3, carrying out secondary heat setting on the elastic sheet cut at fixed length, placing the elastic sheet in a mould with an arched radian in the middle for hot-press setting, keeping the temperature at 135 ℃, the hot-press pressure at 1.2MPa, and the heat-preservation and pressure-maintaining time for 12min to obtain the wiper elastic sheet with a permanent arched radian in the thickness direction, wherein the temperature resistance is-55-210 ℃.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A preparation method of a novel wiper elastic sheet is characterized by comprising the following steps:
s1, taking the continuous fiber aggregate as a reinforcement, taking a thermoplastic high molecular polymer as a matrix, and making the continuous fiber aggregate pass through a die with a cavity through a pultrusion process to prepare a continuous shrapnel under the traction of a drafting device;
s2, cutting the continuous elastic sheet according to the design requirement;
and S3, carrying out secondary heat setting on the elastic sheet cut at fixed length, and placing the elastic sheet in a molding die for hot-press setting to obtain the wiper elastic sheet with an arched radian in the length direction.
2. The method for preparing a novel wiper blade according to claim 1, wherein the continuous fibers are continuous carbon fibers and/or glass fibers.
3. The method for preparing a novel wiper blade according to claim 1, wherein the thermoplastic high molecular polymer is Thermoplastic Polyurethane (TPU), ABS, PP, PA6 or PA 66.
4. The method for preparing a novel wiper blade of claim 1, wherein the volume content of the continuous fiber aggregate in the wiper blade is 65-90%.
5. The method for preparing a novel wiper blade as claimed in claim 1, wherein the width of the continuous blade in S1 is 5-30mm, and the thickness is 0.4-1.2 mm; the length of the elastic piece cut at fixed length in the S2 is 450 mm and 900 mm.
6. The preparation method of the novel wiper blade of claim 1, wherein the snake bend of the composite material blade in the width direction within 1 meter length of the wiper blade is less than 0.1 mm.
7. The method for preparing a novel wiper blade as claimed in claim 1, wherein the forming temperature of the pultrusion process is 100-150 ℃.
8. The method for preparing a novel wiper blade according to claim 1, wherein the heat preservation temperature of the secondary heat setting is 100-.
9. The method for manufacturing a novel wiper blade as claimed in claim 1, wherein the mold having the cavity comprises an upper mold, a lower mold, a cavity, a pad, an upper clamping plate, a lower clamping plate and a connecting bolt, the upper mold and the lower mold are tightly clamped and arranged between the upper clamping plate and the lower clamping plate which are connected through the connecting bolt, a groove is formed in one surface of the upper mold, which is matched with the lower mold, and the cross section of the groove is concave, the pad is fixed on the matching surface of the lower mold, and the cavity is formed by the pad and the groove space of the upper mold.
10. The wiper blade prepared by the method according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910942853.XA CN110654041A (en) | 2019-09-30 | 2019-09-30 | Novel wiper elastic sheet and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910942853.XA CN110654041A (en) | 2019-09-30 | 2019-09-30 | Novel wiper elastic sheet and preparation method thereof |
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| CN110654041A true CN110654041A (en) | 2020-01-07 |
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| CN201910942853.XA Pending CN110654041A (en) | 2019-09-30 | 2019-09-30 | Novel wiper elastic sheet and preparation method thereof |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3657040A (en) * | 1970-02-06 | 1972-04-18 | Samuel M Shobert | Method of fabricating reinforced plastic bows having different draw weights |
| JPS6111778B2 (en) * | 1978-04-06 | 1986-04-04 | Asahi Chemical Ind | |
| US4981637A (en) * | 1988-10-28 | 1991-01-01 | Jmk International, Inc. | Method of forming an improved wiper blade |
| CN101663157A (en) * | 2007-04-17 | 2010-03-03 | 空中客车运营有限公司 | Pultrusion process for production of a continuous profile |
| CN104802423A (en) * | 2015-04-03 | 2015-07-29 | 上海华渔新材料科技有限公司 | Preparation method of fiber reinforced thermoplastic resin based composite automobile hub |
| CN106393742A (en) * | 2016-11-07 | 2017-02-15 | 广东亚太新材料科技有限公司 | Method for preparing thermoplastic carbon fiber flat clip through extrusion drawing method |
| WO2018012270A1 (en) * | 2016-07-14 | 2018-01-18 | 三菱重工業株式会社 | Method and device for producing pultruded article |
| CN110239115A (en) * | 2019-05-08 | 2019-09-17 | 上纬新材料科技股份有限公司 | Fan blade production pultrusion molding process, blade plate and the blade of plate |
-
2019
- 2019-09-30 CN CN201910942853.XA patent/CN110654041A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3657040A (en) * | 1970-02-06 | 1972-04-18 | Samuel M Shobert | Method of fabricating reinforced plastic bows having different draw weights |
| JPS6111778B2 (en) * | 1978-04-06 | 1986-04-04 | Asahi Chemical Ind | |
| US4981637A (en) * | 1988-10-28 | 1991-01-01 | Jmk International, Inc. | Method of forming an improved wiper blade |
| CN101663157A (en) * | 2007-04-17 | 2010-03-03 | 空中客车运营有限公司 | Pultrusion process for production of a continuous profile |
| CN104802423A (en) * | 2015-04-03 | 2015-07-29 | 上海华渔新材料科技有限公司 | Preparation method of fiber reinforced thermoplastic resin based composite automobile hub |
| WO2018012270A1 (en) * | 2016-07-14 | 2018-01-18 | 三菱重工業株式会社 | Method and device for producing pultruded article |
| CN106393742A (en) * | 2016-11-07 | 2017-02-15 | 广东亚太新材料科技有限公司 | Method for preparing thermoplastic carbon fiber flat clip through extrusion drawing method |
| CN110239115A (en) * | 2019-05-08 | 2019-09-17 | 上纬新材料科技股份有限公司 | Fan blade production pultrusion molding process, blade plate and the blade of plate |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20200107 |