CN111469448A - Technology for pultrusion of polyurethane container bottom plate - Google Patents
Technology for pultrusion of polyurethane container bottom plate Download PDFInfo
- Publication number
- CN111469448A CN111469448A CN202010305481.2A CN202010305481A CN111469448A CN 111469448 A CN111469448 A CN 111469448A CN 202010305481 A CN202010305481 A CN 202010305481A CN 111469448 A CN111469448 A CN 111469448A
- Authority
- CN
- China
- Prior art keywords
- polyurethane
- bottom plate
- yarn
- fiber
- cargo box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- B29C70/523—Pultrusion, i.e. forming and compressing by continuously pulling through a die and impregnating the reinforcement in the 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
- 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
-
- 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
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
-
- 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
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
- B29C70/545—Perforating, cutting or machining during or after moulding
-
- 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
- B29L2007/00—Flat articles, e.g. films or sheets
- B29L2007/002—Panels; Plates; Sheets
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The patent relates to the technical field of production processes of container bottom plates, in particular to a process for pultrusion of polyurethane container bottom plates, which comprises the following steps: a: putting the fiber on a frame; b: splitting; c: preforming; d: putting the fiber into a mould; e: traction; f: cutting according to the length of the bottom plate of the carriage; g: and assembling, namely assembling the cut plates into a panel by using bolts. The packing box bottom plate light weight of this scheme excels in, and the packing box obtains subtracting heavy effect by a wide margin, and it is splendid to be able to bear or endure weather, corrosion resistance, has solved current packing box bottom plate weight big, the intensity is low, problem that life is low.
Description
Technical Field
The invention relates to the technical field of production processes of cargo box bottom plates, in particular to a process for pultrusion of a polyurethane cargo box bottom plate.
Background
The existing container bottom plate mainly uses a bamboo plywood with the thickness of 15 mm-18 mm and a steel plate with the thickness of 3 mm-4 mm. Bamboo plywood: drying, dehydrating, layering, pressing and forming, dividing into required specification and size according to the size of a carriage, and finally connecting the required specification and size to a carriage framework by punching riveting or countersunk bolts; steel plate: the surface of the container is subjected to anticorrosive treatment by using an embossed steel process, and finally, the container is connected to the container framework in a welding mode.
Under the background of the times of light weight and energy conservation and emission reduction of automobiles, the integral weight reduction of the automobiles is one of necessary sections for energy conservation, emission reduction and fuel efficiency improvement. The steel plate is used as the bottom plate of the container, 2 sharp problems cannot be solved at present, and using obstacles are caused; (1) the self weight of the car body is increased, and energy conservation and emission reduction are not facilitated, for example, a 4.2-meter car box is adopted, the floor area of a container is 8.3 square meters, a steel plate is adopted as the bottom plate of the container, and the weight of the bottom plate is 195.5 kg-260 kg (the thickness is 3-4 mm); (2) the surface is sprayed with corrosion resistance, after goods are rubbed, the coating is easy to fall off, the bottom plate is easy to rust, and the service life is influenced; the adoption of the bamboo plywood packing case bottom plate has 3 sharp problems, which can not be cracked to cause using obstacles; (1) the bamboo plywood is lighter than a steel plate, but still about 110kg, and still has a heavy weight in the view of national six standards; (2) the bamboo plywood has high water absorption rate which can reach 80-100 percent, and the weight of the bamboo plywood is basically not different from that of a steel plate after water absorption, so that the weight reduction effect is not achieved; (3) after the bamboo plywood absorbs water, layering and internal mildewing are easy to occur, the strength of the bamboo plywood is reduced, the service life is not long, and even safety risks exist.
Disclosure of Invention
The invention aims to provide a process for pultrusion of a polyurethane container bottom plate, which aims to solve the problems of heavy weight and low strength of the existing container bottom plate.
In order to achieve the above object, the basic scheme of the invention is as follows: a process for pultrusion of a polyurethane cargo box floor, comprising the steps of:
a: putting the fiber on a shelf, namely directly putting the glass fiber yarn compatible with the polyurethane system on the shelf;
b: dividing, checking the weight of the plate with the length of 1 meter and the fiber content/yarn density, checking the yarn count, and enabling the yarns to pass through a yarn threading plate in order and in parallel;
c: performing, namely uniformly and parallelly penetrating yarns on the yarn threading plate according to a performing hole position, and coating glass fiber biaxial cloth outside to enhance the transverse strength of the bottom plate profile of the container;
d: the fiber is put into a mould, the mould comprises a mould opening, a heating area and a curing area, polyurethane resin is poured into the mould opening and is soaked with the resin, and the polyurethane resin gradually passes through the heating area and the curing area at the speed of 40 cm/min-100 cm/mi;
e: traction is carried out by utilizing a traction machine, and the traction speed is gradually increased;
f: cutting according to the length of the bottom plate of the carriage;
g: and assembling, namely assembling the cut plates into a panel by using bolts.
Further, in the step a, the glass fiber yarn is selected from 2400tex, 4800tex or 9600 tex.
Further, in the step b, the density of the plate is 2.0g/c square meter, and the fiber content of the glass fiber yarn is 75-78%.
Further, in the step d, the temperature of the die opening is 95-105 ℃, the temperature of the heating zone is 145-155 ℃, and the temperature of the curing zone is 145-155 ℃.
Further, in the step e, the traction speed of the traction machine is 40 cm/min.
Further, the method also comprises the step h: fixing the transverse reinforcing section bar, manufacturing the transverse reinforcing section bar, coating high-strength structural adhesive on the transverse reinforcing section bar, and fixing the container panel and the transverse reinforcing section bar by using countersunk head screws.
The beneficial effect of this scheme: (1) the packing box bottom plate light weight of this scheme excels in, and the packing box obtains heavy effect of subtracting by a wide margin to 4.2 meters's packing box is taken as an example: the weight of the bamboo plywood cargo box is reduced by more than 140kg compared with that of a steel cargo box bottom plate, the weight reduction range is more than 75%, and the weight of the bamboo plywood cargo box is reduced by more than 60kg and 54.5%.
(2) The container bottom plate of this scheme is splendid for the corrosivity problem is solved to the steel bottom plate, has solved for bamboo plywood container bottom plate who is afraid of, moisture absorption, layering, the not long problem of mouldy life, has improved container bottom plate's life and security.
(3) This scheme has set up horizontal reinforcement section bar, has increased the intensity of railway carriage bottom plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
A process for pultrusion of a polyurethane cargo box floor, comprising the steps of:
a: putting the glass fiber yarns compatible with the polyurethane system on a shelf directly, wherein the glass fiber yarns adopt 2400tex (or 4800tex or 9600tex) specification;
b: dividing, namely counting the weight of a plate with the length of 1 meter and the fiber content/yarn density, counting the number of yarns, wherein the plate density is 2.0g/c square meter, the fiber content of the glass fiber yarn is 75-78 percent, the fiber content of the glass fiber yarn is 76 percent, and the yarn passes through a yarn threading plate in order and in parallel;
c: performing, namely uniformly and parallelly penetrating yarns on the yarn threading plate according to a performing hole position, and coating glass fiber biaxial cloth outside to enhance the transverse strength of the bottom plate profile of the container;
d: putting the fiber into a mold, wherein the mold comprises a mold opening, a heating area and a curing area, the polyurethane resin is poured into the mold opening and infiltrated with the resin, the polyurethane resin gradually passes through the heating area and the curing area at the speed of 40cm/min, the temperature of the mold opening is 95-105 ℃ (preferably 100 ℃ in the embodiment), the temperature of the heating area is 145-155 ℃ (preferably 150 ℃ in the embodiment), and the temperature of the curing area is 145-155 ℃ (preferably 150 ℃ in the embodiment);
e: traction, namely utilizing a traction machine to carry out traction, wherein the initial traction speed of the traction machine is 40cm/min, and gradually increasing the traction speed;
f: cutting according to the length of the bottom plate of the carriage;
g: assembling, namely assembling the cut plates into a panel by using bolts;
h: fixing the transverse reinforcing section bar, manufacturing the transverse reinforcing section bar, coating high-strength structural adhesive on the transverse reinforcing section bar, and fixing the container panel and the transverse reinforcing section bar by using countersunk head screws.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics is not described herein in any greater extent than that known in the art at the filing date or prior to the priority date of the application, so that those skilled in the art can now appreciate that all of the above-described techniques in this field and have the ability to apply routine experimentation before this date can be combined with one or more of the present teachings to complete and implement the present invention, and that certain typical known structures or known methods do not pose any impediments to the implementation of the present invention by those skilled in the art. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (6)
1. A technology for pultrusion of a bottom plate of a polyurethane container is characterized by comprising the following steps:
a: putting the fiber on a shelf, namely directly putting the glass fiber yarn compatible with the polyurethane system on the shelf;
b: dividing, checking the weight of the plate with the length of 1 meter and the fiber content/yarn density, checking the yarn count, and enabling the yarns to pass through a yarn threading plate in order and in parallel;
c: performing, namely uniformly and parallelly penetrating yarns on the yarn threading plate according to a performing hole position, and coating glass fiber biaxial cloth outside to enhance the transverse strength of the bottom plate profile of the container;
d: putting the fiber into a mould, wherein the mould comprises a mould opening, a heating area and a curing area, polyurethane resin is poured into the mould opening and is soaked with the resin, and the polyurethane resin gradually passes through the heating area and the curing area at the speed of 40-100 cm/min;
e: traction is carried out by utilizing a traction machine, and the traction speed is gradually increased;
f: cutting according to the length of the bottom plate of the carriage;
g: and assembling, namely assembling the cut plates into a panel by using bolts.
2. The process of pultruding a polyurethane cargo box floor according to claim 1, wherein: in the step a, the glass fiber yarn is selected from 2400tex, 4800tex or 9600tex specifications.
3. The process of pultruding a polyurethane cargo box floor according to claim 2, wherein: in the step b, the density of the plate is 2.0g/c square meter, and the fiber content of the glass fiber yarn is 75-78%.
4. The process of pultruding a polyurethane cargo box floor according to claim 1, wherein: in the step d, the temperature of the die orifice is 95-105 ℃, the temperature of the heating zone is 145-155 ℃, and the temperature of the curing zone is 145-155 ℃.
5. The process of pultruding a polyurethane cargo box floor according to claim 4, wherein: in the step e, the traction speed of the tractor is 40 cm/min.
6. The process of pultruding a polyurethane cargo box floor according to claim 5, wherein: further comprising the step h: fixing the transverse reinforcing section bar, manufacturing the transverse reinforcing section bar, coating high-strength structural adhesive on the transverse reinforcing section bar, and fixing the container panel and the transverse reinforcing section bar by using countersunk head screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010305481.2A CN111469448A (en) | 2020-04-17 | 2020-04-17 | Technology for pultrusion of polyurethane container bottom plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010305481.2A CN111469448A (en) | 2020-04-17 | 2020-04-17 | Technology for pultrusion of polyurethane container bottom plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111469448A true CN111469448A (en) | 2020-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010305481.2A Pending CN111469448A (en) | 2020-04-17 | 2020-04-17 | Technology for pultrusion of polyurethane container bottom plate |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070126142A1 (en) * | 2005-12-01 | 2007-06-07 | Xixian Zhou | Method of making continuous filament reinforced structural plastic profiles using pultrusion/coextrusion |
| CN103589127A (en) * | 2012-08-15 | 2014-02-19 | 上海杰事杰新材料(集团)股份有限公司 | High-transverse-strength pultrusion structural sheet material and manufacturing method thereof |
| CN107160716A (en) * | 2017-06-01 | 2017-09-15 | 常州市宏发纵横新材料科技股份有限公司 | A kind of production system and gel-injection mould for resin pultrude process |
| CN108943773A (en) * | 2018-06-11 | 2018-12-07 | 苏州恒川光伏科技有限公司 | The preparation method of pultrusion polyurethane fiber enhancing composite material |
-
2020
- 2020-04-17 CN CN202010305481.2A patent/CN111469448A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070126142A1 (en) * | 2005-12-01 | 2007-06-07 | Xixian Zhou | Method of making continuous filament reinforced structural plastic profiles using pultrusion/coextrusion |
| CN103589127A (en) * | 2012-08-15 | 2014-02-19 | 上海杰事杰新材料(集团)股份有限公司 | High-transverse-strength pultrusion structural sheet material and manufacturing method thereof |
| CN107160716A (en) * | 2017-06-01 | 2017-09-15 | 常州市宏发纵横新材料科技股份有限公司 | A kind of production system and gel-injection mould for resin pultrude process |
| CN108943773A (en) * | 2018-06-11 | 2018-12-07 | 苏州恒川光伏科技有限公司 | The preparation method of pultrusion polyurethane fiber enhancing composite material |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200731 |
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| RJ01 | Rejection of invention patent application after publication |