CN112795157A - Novel heavy-duty glass fiber reinforced plastic grid and preparation method thereof - Google Patents
Novel heavy-duty glass fiber reinforced plastic grid and preparation method thereof Download PDFInfo
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- CN112795157A CN112795157A CN202110036207.4A CN202110036207A CN112795157A CN 112795157 A CN112795157 A CN 112795157A CN 202110036207 A CN202110036207 A CN 202110036207A CN 112795157 A CN112795157 A CN 112795157A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
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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
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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Abstract
The invention provides a novel heavy-duty glass fiber reinforced plastic grid and a preparation method thereof, wherein the novel heavy-duty glass fiber reinforced plastic grid comprises the following components: 28.2-30.6 wt% of unsaturated polyester resin or vinyl ester resin, 1.9-2.1 wt% of cross-linking agent, 30.3-32.5 wt% of flame retardant, 0.08-0.09 wt% of accelerator, 0.56-0.61 wt% of curing agent, 0.0064-0.0069 wt% of polymerization inhibitor and 34.5-36.4 wt% of alkali-free continuous glass fiber yarn. The novel heavy-duty glass fiber reinforced plastic grating and the preparation method thereof have simple component structures and preparation methods, and the obtained novel heavy-duty glass fiber reinforced plastic grating has good mechanical properties and more excellent flame retardant property, so that the application field of the glass fiber reinforced plastic grating is expanded.
Description
Technical Field
The invention relates to the technical field of gratings, in particular to a novel heavy-duty glass fiber reinforced plastic grating and a preparation method thereof.
Background
The existing heavy-duty glass fiber reinforced plastic grating is mostly under 5 tons in load, and for heavy machinery with more than 5 tons, such as a 15-20 ton forklift, the heavy-duty glass fiber reinforced plastic grating cannot be used for loading, so that the use of the heavy-duty glass fiber reinforced plastic grating is limited.
Disclosure of Invention
In order to solve the problems, the invention provides the novel heavy-duty glass fiber reinforced plastic grating and the preparation method thereof, the component structure and the preparation method are simple, the obtained novel heavy-duty glass fiber reinforced plastic grating has good mechanical property, and simultaneously has more excellent flame retardant property, and the application field of the glass fiber reinforced plastic grating is expanded.
In order to achieve the above purpose, the invention adopts a technical scheme that:
a novel heavy-duty fiberglass-reinforced plastic grid is composed of the following components: 28.2-30.6 wt% of unsaturated polyester resin or vinyl ester resin, 1.9-2.1 wt% of cross-linking agent, 30.3-32.5 wt% of flame retardant, 0.08-0.09 wt% of accelerator, 0.56-0.61 wt% of curing agent, 0.0064-0.0069 wt% of polymerization inhibitor and 34.5-36.4 wt% of alkali-free continuous glass fiber yarn.
Further, 2-4 wt% of color paste or color paste is included.
Further, the cross-linking agent is styrene, the flame retardant is sodium hydroxide, the accelerator is cobalt isooctanoate, the curing agent is methyl ethyl ketone peroxide, and the polymerization inhibitor is catechol.
Further, the flame spread index was 5 and the smoke development index was 150.
Furthermore, the bending strength is more than or equal to 600MPa, and the bending modulus is more than or equal to 25 MPa.
The invention also provides a preparation method of the novel heavy-duty glass fiber reinforced plastic grid based on any one of the above, which comprises the following steps: s10 preparation of a resin mixture, namely, fully mixing 28.2-30.6 wt% of unsaturated polyester resin or vinyl ester resin, 1.9-2.1 wt% of cross-linking agent, 30.3-32.5 wt% of flame retardant, 0.08-0.09 wt% of accelerant, 0.0064-0.0069 wt% of polymerization inhibitor and 2-4 wt% of color paste or color paste to obtain the resin mixture; s20, calculating the total number of alkali-free continuous glass fiber yarns on the sections of the ribs in two directions according to the sizes of the glass fiber reinforced plastic grid ribs to obtain a yarn laying rule; the calculation formula is shown in the following formula (1),
the N yarn is the total number of the alkali-free continuous glass fiber yarns on the section of the rib, h is the height of the rib and is a unit mm, and a is the width of the upper end of the rib and is a unit mm; b is the width of the bottom of the rib, and the unit is mm; rho is the density of the glass fiber reinforced plastic grid, and the unit g/cm 3; the w yarn is the proportion of the alkali-free continuous glass fiber yarn in unit percent; the M yarn is the gram weight of the alkali-free continuous glass fiber yarn per meter, and the unit is g; s30, laying a first yarn layer in the mould according to yarn laying rules; s40, preparing a total mixture, namely adding 0.56-0.61 wt% of curing agent into the resin mixture, fully stirring and uniformly mixing to obtain the total mixture, pouring 50% of the total mixture into a mold, scraping the resin mixture on a module of the mold into the mold by using a scraper, laying a residual yarn layer after leveling, pouring 10-15% of the total mixture into the mold during each pressing, and scraping the total mixture on the mold into the mold by using the scraper; and S50, sequentially carrying out height measurement, face trimming, curing, demolding and treatment to obtain the novel heavy-duty glass fiber reinforced plastic grid.
Further, step S50 includes the following steps: s51, measuring the height and trimming the surface, adjusting the liquid level of the total mixture to be at the same height after adding the total mixture each time, and ensuring the height of the grating to be the height required by the process; s52, curing, controlling the temperature to be 85-95 ℃, and demolding after the grid is completely cured by using sharp tweezers; s53, demoulding, pressing a hydraulic ejection switch, firstly, completely ejecting the grids, cleaning loose cover plates on the modules by using high-pressure gas or other cleaning tools, and then ejecting the modules upwards in parallel and stably; and S54, polishing the surface of the grating by using a grinding wheel after the grating is demoulded, removing acute angles formed by molding and redundant resin and glass fiber yarns, measuring the height by using a depth gauge to ensure that the height reaches the process requirement height, polishing the protrusion formed on the back of the grating due to the depression of the thimble by using the grinding wheel, and brushing dust and scraps by using a brush after polishing is finished to obtain the novel heavy-duty glass fiber reinforced plastic grating.
Further, the yarn laying rule is as follows: s21 laying a first layer, namely laying the first layer on the mould in the length direction of the mould by adopting a mode that a yarn applicator continuously separates three modules on the mould; then, paving the fabric on the mould in the width direction of the mould in a mode of continuously separating one module by a yarn applicator; s22 laying a second layer, namely laying the second layer on the mould in a mode that a yarn applicator continuously separates one module on the mould in the length direction of the mould; then, the yarn applying device is adopted to lay the fabric in a mode of continuously separating one module at one side of the mould in the width direction of the mould, and the yarn applying device is adopted to lay the fabric in a mode of continuously separating two modules at the other side of the mould in the width direction of the mould; s23 laying the third layer, namely laying the yarn applying device on one side of the mould continuously at intervals of one module in the length direction of the mould, and laying the yarn applying device on the other side of the mould continuously at intervals of two modules in the length direction of the mould; then, the yarn applying device is adopted to lay the fabric in a mode of continuously separating one module at one side of the mould in the width direction of the mould, and the yarn applying device is adopted to lay the fabric in a mode of continuously separating two modules at the other side of the mould in the width direction of the mould; s24 laying the fourth layer, laying the fourth layer in the mode that the yarn applying device continuously separates one module at one side of the mould in the length direction of the mould, and laying the fourth layer in the mode that the yarn applying device continuously separates two modules at the other side of the mould in the length direction of the mould; then, continuously separating a module on one side of the die by using a yarn applicator in the width direction of the die, and continuously separating two modules on the other side of the die by using the yarn applicator in the width direction of the die; then pressing and leveling; s25 laying the fifth, sixth and seventh layers, namely laying the yarn applying device on one side of the mould continuously at intervals of one module in the length direction of the mould, and laying the yarn applying device on the other side of the mould continuously at intervals of two modules in the length direction of the mould; then, the yarn applying device is adopted to lay the fabric in a mode of continuously separating one module at one side of the mould in the width direction of the mould, and the yarn applying device is adopted to lay the fabric in a mode of continuously separating two modules at the other side of the mould in the width direction of the mould; after the laying of the seventh layer is finished, flattening by pressing; s26, repeating the laying mode of the fifth layer, the sixth layer and the seventh layer until the n-1 layer is laid; s27, laying the n-1 th layer, namely laying the layer in the length direction of the mould in a mode that a yarn applicator is continuously arranged at one side of the mould at intervals of one module, and laying the layer in the length direction of the mould in a mode that the yarn applicator is continuously arranged at the other side of the mould at intervals of two modules; then, the yarn applying device is adopted to lay the fabric in a mode of continuously separating one module at one side of the mould in the width direction of the mould, and the yarn applying device is adopted to lay the fabric in a mode of continuously separating two modules at the other side of the mould in the width direction of the mould; s28, laying the nth layer, namely laying the nth layer in a mode that a yarn applicator is continuously separated by one module at one side of the mould in the length direction of the mould, and laying the nth layer in a mode that the yarn applicator is continuously separated by two modules at the other side of the mould in the length direction of the mould; and then, paving the fiber on the die at intervals of three modules continuously in the width direction of the die by adopting a yarn applicator, and pressing and flattening the fiber after paving the fiber in the width direction of the die.
Furthermore, the yarn applicator is a yarn spreading device with three copper pipes, and three glass fiber yarns penetrate through each copper pipe.
Further, each pressing time is more than 30 s.
Compared with the prior art, the technical scheme of the invention has the following advantages:
the novel heavy-duty glass fiber reinforced plastic grating and the preparation method thereof have simple component structures and preparation methods, and the obtained novel heavy-duty glass fiber reinforced plastic grating has good mechanical properties and more excellent flame retardant property, so that the application field of the glass fiber reinforced plastic grating is expanded.
Drawings
The technical solution and the advantages of the present invention will be apparent from the following detailed description of the embodiments of the present invention with reference to the accompanying drawings.
FIG. 1 is a flow chart of a method for manufacturing a novel heavy-duty fiberglass-reinforced plastic grid according to an embodiment of the present invention;
FIG. 2 is a schematic view showing a laying rule of the alkali-free continuous glass fiber yarn in one laying interval according to an embodiment of the present invention;
FIG. 3 is a schematic view showing a laying rule of alkali-free continuous glass fiber yarns laid at three intervals according to an embodiment of the present invention;
fig. 4 is a laying rule diagram of the alkali-free continuous glass fiber yarn laid every other two times according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
The embodiment provides a novel heavy-duty glass fiber reinforced plastic grid, which consists of the following components: 28.2-30.6 wt% of unsaturated polyester resin or vinyl ester resin, 1.9-2.1 wt% of cross-linking agent, 30.3-32.5 wt% of flame retardant, 0.08-0.09 wt% of accelerator, 0.56-0.61 wt% of curing agent, 0.0064-0.0069 wt% of polymerization inhibitor, 34.5-36.4 wt% of alkali-free continuous glass fiber yarn and 2-4 wt% of color paste or color paste.
The cross-linking agent is styrene, the flame retardant is sodium hydroxide, the accelerator is cobalt isooctanoate, the curing agent is methyl ethyl ketone peroxide, and the polymerization inhibitor is catechol.
The flame propagation index of the novel heavy-duty fiberglass-reinforced plastic grid is 5, and the smoke development index is 150. The bending strength is more than or equal to 600Mpa, and the bending modulus is more than or equal to 25 Mpa.
The invention also provides a preparation method based on the novel heavy-duty glass fiber reinforced plastic grating, as shown in figure 1, comprising the following steps: s10 preparation of resin mixture, 28.2-30.6 wt% of unsaturated polyester resin or vinyl ester resin, 1.9-2.1 wt% of cross-linking agent, 30.3-32.5 wt% of flame retardant, 0.08-0.09 wt% of accelerant, 0.0064-0.0069 wt% of polymerization inhibitor and 2-4 wt% of color paste or color paste are fully mixed to obtain the resin mixture. S20, calculating the total number of the alkali-free continuous glass fiber yarns on the sections of the ribs in two directions according to the sizes of the glass fiber reinforced plastic grid ribs to obtain the yarn laying rule. The calculation formula is shown in the following formula (1),
wherein N isYarnThe total number of the alkali-free continuous glass fiber yarns on the section of the rib is h, the height of the rib is h, and the unit mm is a, and a is the width of the upper end of the rib and the unit mm; b is the width of the bottom of the rib, and the unit is mm; rho is the density of the glass fiber reinforced plastic grid, and the unit g/cm3；wYarnIs the proportion of alkali-free continuous glass fiber yarn, unit percent; mYarnIs the gram weight of alkali-free continuous glass fiber yarn per meter and unit g. S30 laying a first layer of yarn in the mold according to the yarn laying rules. S40, preparing a total mixture, namely adding 0.56-0.61 wt% of curing agent into the resin mixture, fully stirring and uniformly mixing to obtain the total mixture, pouring 50% of the total mixture into a mold, scraping the resin mixture on a module of the mold into the mold by using a scraper, laying a residual yarn layer after leveling, pouring 10-15% of the total mixture into the mold during each pressing, and scraping the total mixture on the mold into the mold by using the scraper; and S50, sequentially carrying out height measurement, face trimming, curing, demolding and treatment to obtain the novel heavy-duty glass fiber reinforced plastic grid.
The yarn laying rule is shown in the following table 1, the yarn applicator used in the yarn laying process is a yarn laying device with three copper pipes, three glass fiber yarns penetrate through each copper pipe, and the yarn layers are arranged according to the following table according to the calculated total number of the alkali-free continuous glass fiber yarns. The pressing process has a pressing time of more than 30 s.
TABLE 1 yarn laying rules
The yarn laying rule is as follows:
s21 laying a first layer, namely laying the first layer on the mould in the length direction of the mould by adopting a mode that a yarn applicator continuously separates three modules on the mould; and then the yarn is laid on the mould in the width direction of the mould in a mode that a yarn applicator continuously separates one module. S22 laying a second layer, namely laying the second layer on the mould in a mode that a yarn applicator continuously separates one module on the mould in the length direction of the mould; and then, the yarn applying device is adopted to lay the fabric continuously at one side of the mould at intervals of one module in the width direction of the mould, and the yarn applying device is adopted to lay the fabric continuously at the other side of the mould at intervals of two modules in the width direction of the mould. S23 laying the third layer, namely laying the yarn applying device on one side of the mould continuously at intervals of one module in the length direction of the mould, and laying the yarn applying device on the other side of the mould continuously at intervals of two modules in the length direction of the mould; and then, the yarn applying device is adopted to lay the fabric continuously at one side of the mould at intervals of one module in the width direction of the mould, and the yarn applying device is adopted to lay the fabric continuously at the other side of the mould at intervals of two modules in the width direction of the mould. S24 laying the fourth layer, laying the fourth layer in the mode that the yarn applying device continuously separates one module at one side of the mould in the length direction of the mould, and laying the fourth layer in the mode that the yarn applying device continuously separates two modules at the other side of the mould in the length direction of the mould; then, continuously separating a module on one side of the die by using a yarn applicator in the width direction of the die, and continuously separating two modules on the other side of the die by using the yarn applicator in the width direction of the die; and then flattening by pressing. S25 laying the fifth, sixth and seventh layers, namely laying the yarn applying device on one side of the mould continuously at intervals of one module in the length direction of the mould, and laying the yarn applying device on the other side of the mould continuously at intervals of two modules in the length direction of the mould; then, the yarn applying device is adopted to lay the fabric in a mode of continuously separating one module at one side of the mould in the width direction of the mould, and the yarn applying device is adopted to lay the fabric in a mode of continuously separating two modules at the other side of the mould in the width direction of the mould; and flattening by pressing after the laying of the seventh layer is finished. S26, repeating the laying mode of the fifth layer, the sixth layer and the seventh layer until the n-1 layer is laid. S27, laying the n-1 th layer, namely laying the layer in the length direction of the mould in a mode that a yarn applicator is continuously arranged at one side of the mould at intervals of one module, and laying the layer in the length direction of the mould in a mode that the yarn applicator is continuously arranged at the other side of the mould at intervals of two modules; and then, the yarn applying device is adopted to lay the fabric continuously at one side of the mould at intervals of one module in the width direction of the mould, and the yarn applying device is adopted to lay the fabric continuously at the other side of the mould at intervals of two modules in the width direction of the mould. S28, laying the nth layer, namely laying the nth layer in a mode that a yarn applicator is continuously separated by one module at one side of the mould in the length direction of the mould, and laying the nth layer in a mode that the yarn applicator is continuously separated by two modules at the other side of the mould in the length direction of the mould; and then, paving the fiber on the die at intervals of three modules continuously in the width direction of the die by adopting a yarn applicator, and pressing and flattening the fiber after paving the fiber in the width direction of the die.
Step S50 includes the following steps:
s51, measuring the height and trimming the surface, adjusting the liquid level of the total mixture to the same height after adding the total mixture each time, and ensuring the height of the grid to be the height required by the process. S52, curing, controlling the temperature between 85 ℃ and 95 ℃, and demolding after the grid is completely cured by using sharp tweezers. S53, demoulding, pressing a hydraulic ejection switch, firstly, ejecting all the grids loosely, cleaning loose cover plates on the modules by using high-pressure gas and other cleaning tools, and then ejecting the grids upwards in parallel and stably. And S54, polishing the surface of the grating by using a grinding wheel after the grating is demoulded, removing acute angles formed by molding and redundant resin and glass fiber yarns, measuring the height by using a depth gauge to ensure that the height reaches the process requirement height, polishing the protrusion formed on the back of the grating due to the depression of the thimble by using the grinding wheel, and brushing dust and scraps by using a brush after polishing is finished to obtain the novel heavy-duty glass fiber reinforced plastic grating.
The above description is only an exemplary embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes that are transformed by the content of the present specification and the attached drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The novel heavy-duty glass fiber reinforced plastic grid is characterized by comprising the following components: 28.2-30.6 wt% of unsaturated polyester resin or vinyl ester resin, 1.9-2.1 wt% of cross-linking agent, 30.3-32.5 wt% of flame retardant, 0.08-0.09 wt% of accelerator, 0.56-0.61 wt% of curing agent, 0.0064-0.0069 wt% of polymerization inhibitor and 34.5-36.4 wt% of alkali-free continuous glass fiber yarn.
2. The novel heavy-duty fiberglass reinforced plastic grid according to claim 1, further comprising 2-4 wt% of color paste or color paste.
3. The novel heavy-duty fiberglass grid according to claim 1, wherein the cross-linking agent is styrene, the flame retardant is sodium hydroxide, the accelerator is cobalt isooctanoate, the curing agent is methyl ethyl ketone peroxide, and the polymerization inhibitor is catechol.
4. A novel heavy duty fiberglass reinforced plastic grid according to claim 1, wherein the flame spread index is 5 and the smoke development index is 150.
5. The novel heavy-duty fiberglass reinforced plastic grid according to claim 1, wherein the flexural strength is not less than 600Mpa and the flexural modulus is not less than 25 Mpa.
6. The method for preparing a novel heavy-duty fiberglass reinforced plastic grid according to any one of claims 1 to 5, characterized by comprising the following steps:
s10 preparation of a resin mixture, namely, fully mixing 28.2-30.6 wt% of unsaturated polyester resin or vinyl ester resin, 1.9-2.1 wt% of cross-linking agent, 30.3-32.5 wt% of flame retardant, 0.08-0.09 wt% of accelerant, 0.0064-0.0069 wt% of polymerization inhibitor and 2-4 wt% of color paste or color paste to obtain the resin mixture;
s20, calculating the total number of alkali-free continuous glass fiber yarns on the sections of the ribs in two directions according to the sizes of the glass fiber reinforced plastic grid ribs to obtain a yarn laying rule; the calculation formula is shown in the following formula (1),
wherein N isYarnThe total number of the alkali-free continuous glass fiber yarns on the section of the rib is h, the height of the rib is h, and the unit mm is a, and a is the width of the upper end of the rib and the unit mm; b is the width of the bottom of the rib, and the unit is mm; rho is the density of the glass fiber reinforced plastic grid, and the unit g/cm3；wYarnIs the proportion of alkali-free continuous glass fiber yarn, unit percent; mYarnThe weight per meter of alkali-free continuous glass fiber yarn is gram weight, unit g;
s30, laying a first yarn layer in the mould according to yarn laying rules;
s40, preparing a total mixture, namely adding 0.56-0.61 wt% of curing agent into the resin mixture, fully stirring and uniformly mixing to obtain the total mixture, pouring 50% of the total mixture into a mold, scraping the resin mixture on a module of the mold into the mold by using a scraper, laying a residual yarn layer after leveling, pouring 10-15% of the total mixture into the mold during each pressing, and scraping the total mixture on the mold into the mold by using the scraper; and
s50, sequentially carrying out height measurement, face trimming, curing, demolding and processing to obtain the novel heavy-duty glass fiber reinforced plastic grid.
7. The method for preparing a novel heavy-duty fiberglass reinforced plastic grid according to claim 6, wherein the step S50 comprises the following steps:
s51, measuring the height and trimming the surface, adjusting the liquid level of the total mixture to be at the same height after adding the total mixture each time, and ensuring the height of the grating to be the height required by the process;
s52, curing, controlling the temperature to be 85-95 ℃, and demolding after the grid is completely cured by using sharp tweezers;
s53, demoulding, pressing a hydraulic ejection switch, firstly, completely ejecting the grids, cleaning loose cover plates on the modules by using high-pressure gas or other cleaning tools, and then ejecting the modules upwards in parallel and stably;
and S54, polishing the surface of the grating by using a grinding wheel after the grating is demoulded, removing acute angles formed by molding and redundant resin and glass fiber yarns, measuring the height by using a depth gauge to ensure that the height reaches the process requirement height, polishing the protrusion formed on the back of the grating due to the depression of the thimble by using the grinding wheel, and brushing dust and scraps by using a brush after polishing is finished to obtain the novel heavy-duty glass fiber reinforced plastic grating.
8. The method for preparing a novel heavy-duty fiberglass reinforced plastic grid according to claim 6, wherein the yarn laying rule is as follows:
s21 laying a first layer, namely laying the first layer on the mould in the length direction of the mould by adopting a mode that a yarn applicator continuously separates three modules on the mould; then, paving the fabric on the mould in the width direction of the mould in a mode of continuously separating one module by a yarn applicator;
s22 laying a second layer, namely laying the second layer on the mould in a mode that a yarn applicator continuously separates one module on the mould in the length direction of the mould; then, the yarn applying device is adopted to lay the fabric in a mode of continuously separating one module at one side of the mould in the width direction of the mould, and the yarn applying device is adopted to lay the fabric in a mode of continuously separating two modules at the other side of the mould in the width direction of the mould;
s23 laying the third layer, namely laying the yarn applying device on one side of the mould continuously at intervals of one module in the length direction of the mould, and laying the yarn applying device on the other side of the mould continuously at intervals of two modules in the length direction of the mould; then, the yarn applying device is adopted to lay the fabric in a mode of continuously separating one module at one side of the mould in the width direction of the mould, and the yarn applying device is adopted to lay the fabric in a mode of continuously separating two modules at the other side of the mould in the width direction of the mould;
s24 laying the fourth layer, laying the fourth layer in the mode that the yarn applying device continuously separates one module at one side of the mould in the length direction of the mould, and laying the fourth layer in the mode that the yarn applying device continuously separates two modules at the other side of the mould in the length direction of the mould; then, continuously separating a module on one side of the die by using a yarn applicator in the width direction of the die, and continuously separating two modules on the other side of the die by using the yarn applicator in the width direction of the die; then pressing and leveling;
s25 laying the fifth, sixth and seventh layers, namely laying the yarn applying device on one side of the mould continuously at intervals of one module in the length direction of the mould, and laying the yarn applying device on the other side of the mould continuously at intervals of two modules in the length direction of the mould; then, the yarn applying device is adopted to lay the fabric in a mode of continuously separating one module at one side of the mould in the width direction of the mould, and the yarn applying device is adopted to lay the fabric in a mode of continuously separating two modules at the other side of the mould in the width direction of the mould; after the laying of the seventh layer is finished, flattening by pressing;
s26, repeating the laying mode of the fifth layer, the sixth layer and the seventh layer until the n-1 layer is laid;
s27, laying the n-1 th layer, namely laying the layer in the length direction of the mould in a mode that a yarn applicator is continuously arranged at one side of the mould at intervals of one module, and laying the layer in the length direction of the mould in a mode that the yarn applicator is continuously arranged at the other side of the mould at intervals of two modules; then, the yarn applying device is adopted to lay the fabric in a mode of continuously separating one module at one side of the mould in the width direction of the mould, and the yarn applying device is adopted to lay the fabric in a mode of continuously separating two modules at the other side of the mould in the width direction of the mould;
s28, laying the nth layer, namely laying the nth layer in a mode that a yarn applicator is continuously separated by one module at one side of the mould in the length direction of the mould, and laying the nth layer in a mode that the yarn applicator is continuously separated by two modules at the other side of the mould in the length direction of the mould; and then, paving the fiber on the die at intervals of three modules continuously in the width direction of the die by adopting a yarn applicator, and pressing and flattening the fiber after paving the fiber in the width direction of the die.
9. The method for preparing a novel heavy-duty fiberglass-reinforced plastic grid according to claim 8, wherein the yarn applicator is a yarn spreader of three copper tubes, and three fiberglass yarns pass through each copper tube.
10. The method of claim 6, wherein each pressing time is more than 30 s.
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| CN (1) | CN112795157A (en) |
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