CN112810189A - Light high-strength pallet panel, pallet and assembling method thereof - Google Patents
Light high-strength pallet panel, pallet and assembling method thereof Download PDFInfo
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- CN112810189A CN112810189A CN202011469946.4A CN202011469946A CN112810189A CN 112810189 A CN112810189 A CN 112810189A CN 202011469946 A CN202011469946 A CN 202011469946A CN 112810189 A CN112810189 A CN 112810189A
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Classifications
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- 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
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- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/521—Pultrusion, i.e. forming and compressing by continuously pulling through a die and impregnating the reinforcement before the die
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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
- B29C70/525—Component parts, details or accessories; Auxiliary operations
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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
- B29C70/54—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D19/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
- B65D19/0004—Rigid pallets without side walls
- B65D19/0053—Rigid pallets without side walls the load supporting surface being made of more than one element
- B65D19/0077—Rigid pallets without side walls the load supporting surface being made of more than one element forming discontinuous or non-planar contact surfaces
- B65D19/0089—Rigid pallets without side walls the load supporting surface being made of more than one element forming discontinuous or non-planar contact surfaces the base surface being made of more than one element
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D19/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
- B65D19/38—Details or accessories
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
- B65D25/20—External fittings
- B65D25/24—External fittings for spacing bases of containers from supporting surfaces, e.g. legs
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D201/00—Coating compositions based on unspecified macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
Abstract
The invention relates to a light high-strength tray panel and a continuous production method thereof, a light high-strength tray and an assembly method thereof, wherein +/-45-degree biaxial fibers are arranged on the upper surface of the panel, 0-degree/90-degree biaxial fibers are arranged on a middle reinforcing layer, a knitted felt is arranged on the lower surface of the panel, a continuous fiber layer consisting of continuous direct fibers is also arranged between the middle reinforcing layer and the knitted felt layer, and +/-45-degree biaxial fibers are adopted on the upper surface layer, so that the layer shear strength of the panel can be improved by more than 30 percent, the deformation of a product can be well restrained, and the nail installing capability of the panel can be improved by several times. The reinforcing layer adopts a 0 degree/90 degree paving layer structure, so that the transverse strength of the panel is increased by more than 40 percent, and the optimization of the stress direction of the panel is facilitated. The lower surface layer adopts the knitted felt, so that the process difficulty is favorably reduced, the resin-based continuous glass fiber reinforced material is adopted, the continuous pultrusion forming process is used, the forming of the tray panels with various dimensions is realized by a pair of dies, the production of the panel surface with a complex structure can be realized, and the pultrusion production is stable.
Description
Technical Field
The invention belongs to the technical field of manufacturing of trays for logistics storage, and particularly relates to a continuous production method of a light high-strength tray panel and an assembly method of the tray.
Background
The tray is a platform for converting static-load goods into dynamic-load goods, is matched with a loading instrument, can quickly realize the turnover of the goods, is widely applied to the fields of production, packaging, storage, transportation and the like at present, and is considered to be one of key innovations in the logistics industry in the 20 th century.
At present, the tray is mainly made of materials such as wood, plastics, metal and the like. The wooden tray is mainly made of wood bars made of logs (solid wood) and is fixedly connected with the wood bars through nails to form the tray. The main defects of the wooden tray are low strength and poor bearing performance; high water absorption, easy loosening and corrosion of the connecting position, and low service life. The metal material tray, generally adopt steel section bar, make through welding or riveting, the characteristics are intensity height, but its shortcoming is also very obvious: self-weight, easy corrosion and high price. The plastic tray is easy to age, low in strength, poor in repairability and short in service life, and is high in single use cost and high in die sinking research and development cost.
Disclosure of Invention
The invention provides a light high-strength tray panel and a continuous production method thereof, a light high-strength tray and an assembly method thereof.
The invention is realized by the following technical scheme:
the utility model provides a high-strength light tray panel, includes the body, the body includes surface fiber layer, middle enhancement layer, continuous fiber layer and the knitting felt layer by the gumming resin parcel from last to down in proper order on the length direction of body, surface fiber layer is 45 biaxial fibre layer structures of spreading, middle enhancement layer is 0 and 90 biaxial fibre layer structures of spreading.
Preferably, the upper surface of the body is uniformly provided with semicircular anti-skidding bosses, and the lower surface of the body is uniformly provided with reinforcing ribs along the length direction.
Preferably, the dipping resin comprises 100 parts by weight of epoxy resin, 50-80 parts by weight of curing agent and 0.5-2 parts by weight of internal release agent.
The utility model provides a light high-strength tray, includes above-mentioned light high-strength tray panel, still includes two at least supporting legss that the lower surface of panel evenly set up along its width direction, the supporting legs includes that the surface soaks has the stifling wood of adventitia resin, and its upper surface is equipped with and is used for holding the groove of strengthening rib, the lower surface mounting has the wear-resisting cushion of rubber.
A continuous production method of the light high-strength pallet panel comprises the following steps:
step one, designing a layer structure of a panel; the panel includes surperficial fibrous layer, middle enhancement layer and knitting felt layer from last to down in proper order, the surperficial fibrous layer is 45 biaxial fibre layer structures, middle enhancement layer is 0 and 90 biaxial fibre layer structures.
Step two, performing a yarn count calculation of the yarns of the fiber layer and the middle reinforcing layer on the surface of the panel,
step three, the yarns with the yarn count checked in the step two sequentially, uniformly and crosslessly penetrate into a yarn splitting plate of pultrusion continuous forming equipment, then enter into a preforming plate of the pultrusion continuous forming equipment, and enter into a cavity of a heated forming die after preforming; simultaneously, injecting gum dipping resin into the cavity of the forming mold, soaking yarns, and filling the gum dipping resin into the forming mold to form a panel blank;
continuously drawing the panel blank molded in the molding die out of the fixedly placed molding die at the speed of 20-70cm/min, and sequentially passing through a pre-curing area, a curing area and a post-curing area of continuous pultrusion equipment to form a continuous panel;
and fifthly, in the post-curing area or a cutting area arranged behind the post-curing area, cutting the continuous panel with the fixed width into a panel body with the specified specification of the tray.
Preferably, in the second step, the count of the yarn is equal to [ the cross-sectional area (mm) of the pallet panel ]2) Gamma tray panel density (cm)2Gamma tray panel set fiber weight-knit felt weight ÷ fiber yarn density (g/m).
Preferably, the weight of the fibers set by the tray panel is 70-75% of the total weight of the tray panel, the density of the fiber yarns is 1.9-2.0 g/m, and the density of the tray panel is 300-600 g/m2。
Preferably, the temperature of the pre-curing zone is 80 ℃ to 100 ℃, the temperature of the curing zone is 140 ℃ to 170 ℃, and the temperature of the post-curing zone is 150 ℃ to 170 ℃.
The assembling method of the light high-strength tray comprises the following steps:
s1, producing the light high-strength tray panel body according to the continuous production method of the light high-strength tray panel in the claim 5;
s2, grinding the bonding position of the panel body, and removing the surface area smoothness of the combination of the panel body and the supporting legs by using sand paper according to a process file;
s3, preparing supporting legs with the width consistent with the width of the panel body, or directly taking the supporting legs with the width consistent with the width of the panel body;
s4, gluing, namely coating structural adhesive on the upper surfaces of the grooves of the supporting legs, installing the structural adhesive on the left side and the right side of the lower surface of the panel according to the positions of the panel reinforcing ribs, compacting, and fixing by using flat head screws;
the order of the S3 may be interchanged with the order of the S1 or S2.
Preferably, the S3 is configured to prepare a supporting foot having a width corresponding to the width of the panel body, and further includes the following steps:
s3.1, taking the fumigation wood matched with the specification of the panel body, and slotting according to the position of the reinforcing rib on the lower surface of the panel;
s3.2, immersing the fumigated wood into the fumigated wood outer membrane resin, and hanging the fumigated wood with a hook for air cooling and curing for at least 0.5 hour;
the formula of the fumigating wood outer film resin is as follows:
compared with the prior art, the invention has the advantages that:
1. the invention relates to a light high-strength tray panel and a continuous production method thereof, a light high-strength tray and an assembly method thereof.A +/-45-degree biaxial fiber is arranged on the upper surface of the panel, a middle reinforcing layer is made of 0-degree/90-degree biaxial fiber, a lower surface is made of a knitted felt, a continuous fiber layer consisting of continuous direct fibers is also arranged between the middle reinforcing layer and the knitted felt layer, and the +/-45-degree biaxial fiber is adopted on the upper surface layer, so that the layer shear strength of the panel can be improved by more than 30 percent, the deformation of a product can be well restrained, the nail installing capacity of the product can be improved by several times, and a screw and a supporting leg are connected more firmly. The reinforcing layer adopts a 0 degree/90 degree paving layer structure, so that the transverse strength of the panel is increased by more than 40 percent, and the optimization of the stress direction of the panel is facilitated. The lower surface layer adopts the knitted felt, which is beneficial to reducing the process difficulty, can realize the production of the board surface with a complex structure and ensure that the pultrusion production is stable.
2. According to the light high-strength tray panel and the continuous production method thereof, as well as the light high-strength tray and the assembly method thereof, the panel is of a solid integral structure, and is formed by selecting an FRP (fiber reinforced plastic) continuous pultrusion mode, the panel has anisotropy, the direction of continuous fibers is the strongest direction, and the direction is set as the direction of the forklift to enter and exit, so that the maximum utilization rate of material design is achieved, and the impact resistance is high; the anti-skid pallet is composed of reinforcing ribs and anti-skid semicircular bosses (a structure formed by pultrusion of a die), the reinforcing ribs enhance the bearing capacity of the pallet, the semicircular anti-skid bosses increase the friction force between the pallet and the carried goods, the semicircular anti-skid bosses are beneficial to subsequent countersunk head screws, and meanwhile, the semicircular anti-skid bosses also have the effect of the reinforcing ribs, so that the bearing capacity of the pallet can be increased. The panel raw materials are continuously produced, the production efficiency is high, the panel of one tray can be produced in 2min, the length of the panel can be cut into any size, one die can be realized, the production of the tray panels with various length specifications is met, and the development cost is greatly reduced. For example, the width of the mold is 1 meter, and the tray can realize the standard tray making of 1m by 1m, 1m by 1.1m and 1m by 1.2m, or the customized tray with any length.
3. According to the light high-strength tray panel, the continuous production method thereof, the light high-strength tray and the assembly method thereof, the yarn is soaked by the impregnated resin in a filling manner, so that no volatile substance overflows in comparison with the impregnated groove manner, the production environment is friendly, the material use efficiency is high, and the resin utilization rate is at least improved by 3% in comparison with the impregnated groove manner; foreign matters such as moisture and dust can not enter the panel in the production process, and the production quality is stable. The glue dipping resin adopts epoxy resin, so that the panel has strong environmental adaptability, and is not influenced by humidity, water, salt, acid, ultraviolet rays and the temperature of-60-70 ℃, and the service life is long. The epoxy resin has high strength, so that the tensile strength of the tray panel can reach more than 400Mpa, and the tensile modulus can reach more than 30Gpa, which is at least 10 times of that of the plastic tray, so that the tray has high bearing capacity, light self weight and long service life.
4. According to the light high-strength tray and the assembling method thereof, the support legs provide the compression strength and the countersunk head screw fixing force of the tray, so that the FRP panel and the support legs are connected more firmly. The outer part of the supporting leg is provided with a resin protective layer of the outer membrane of the fumigating wood, so that moisture is prevented from entering the fumigating wood, the fumigating wood is prevented from being corroded, and the fumigating wood cannot generate biological propagation. The contact surface of the supporting leg and the ground is provided with a rubber wear-resistant rubber pad, so that the outer film resin protective layer is prevented from directly contacting the ground, and the resin film of the supporting leg is protected; and timber compressive strength is high, and tray bearing capacity is stronger, and the supporting legs direction of laying is the width direction that panel rerum natura is weaker, has improved the transverse strength of tray from the side face. The panel and the supporting legs are glued by structural glue, the contact area is large, the gluing force is large, the countersunk head screw is adopted for fixing, the characteristic that the binding property of the wood support is good is fully utilized, the defect that the binding property of the panel is poor is overcome, the countersunk head screw and the nut can be designed with a metal gasket, the direct friction between the panel and the nut is avoided, the nut handling area is increased, and finally the supporting legs, the panel and the screws are connected more firmly.
5. The light high-strength pallet is light in weight and high in strength, and when the weight of the pallet is the same as that of a plastic pallet, the weight of the pallet is 60% -80% of that of a steel pallet, and the weight of the pallet is 30% -50% of that of the plastic pallet; the tensile strength in the strongest direction is more than 20 times that of plastic and more than 3 times that of common steel; the tray has excellent weather resistance and corrosion resistance, basically has no damage to the tray in ultraviolet and high humidity environments, has long service life which can be estimated conservatively and can be more than 5 years, and is convenient to maintain and easy to clean the surface.
Drawings
FIG. 1 is a schematic view of the internal structure of a lengthwise cross section of one embodiment of the lightweight high-strength pallet panel of the present invention;
FIG. 2 is a schematic longitudinal structural view of one embodiment of a lightweight high-strength pallet panel according to the present invention;
FIG. 3 is an enlarged, fragmentary view of the lightweight, high-strength pallet panel of FIG. 2;
fig. 4 is a schematic view of the lower surface structure of an embodiment of the light-weight high-strength pallet panel of the present invention, wherein the direction shown by the arrow is the length direction of the body or the arrangement direction of the continuous fibers of the continuous fiber layer;
FIG. 5 is a schematic structural view of the lightweight high-strength pallet of the present invention in a front view along the length direction;
FIG. 6 is a schematic structural diagram of a supporting leg of the lightweight high-strength pallet according to the present invention;
FIG. 7 is a process flow diagram of a continuous production method of the lightweight high-strength pallet panel according to the present invention;
fig. 8 is a flow chart of an assembling method of the lightweight high-strength pallet according to the present invention.
The various reference numbers in the figures are listed below: 1-light high-strength pallet panel, 1A-antiskid boss, 1B-reinforcing rib, 11-surface fiber layer, 12-middle reinforcing layer, 13-continuous fiber layer, 14-knitting felt layer, 15-gum resin, 2-supporting leg, 21-outer membrane resin, 22-fumigating wood, 23-groove, 24-rubber wear-resistant rubber pad.
Detailed Description
To facilitate an understanding of the invention, the invention is described in more detail below with reference to figures 1-8 and the specific examples.
Example 1
The utility model provides a high tray panel of light 1, as shown in fig. 1-4, includes the body, the body includes surface fibre layer 11, middle enhancement layer 12, continuous fiber layer 13 and the knitting felt layer 14 of being glued resin 15 parcel from last to down in proper order on the length direction of body, surface fibre layer 11 is 45 biaxial fibre and lays the layer structure, middle enhancement layer 12 is 0 and 90 biaxial fibre and lays the layer structure. A continuous fiber layer 13 composed of continuous direct fibers is further arranged between the middle reinforcing layer 12 and the knitting felt layer 14, +/-45-degree biaxial fibers are adopted on the upper surface layer, the layer shear strength of the panel can be improved by more than 30%, the deformation of a product can be well restrained, the nailing capacity of the product can be improved by multiple times, and screws and supporting legs are connected more firmly. The reinforcing layer adopts an 0/90 layering structure, so that the transverse strength of the panel is increased by more than 40%, and the optimization of the stress direction of the panel is facilitated. The lower surface layer adopts the knitted felt, which is beneficial to reducing the process difficulty, can realize the production of the board surface with a complex structure and ensure that the pultrusion production is stable. The length direction of the body is the arrangement direction of the continuous fibers of the continuous fiber layer 13.
Preferably, as shown in fig. 2, semicircular anti-slip bosses 1A are uniformly arranged on the upper surface of the body, and reinforcing ribs 1B are uniformly arranged on the lower surface of the body along the length direction thereof. The reinforcing rib 1B strengthens the bearing capacity of the panel, the semicircular anti-skid boss 1A increases the friction force between the tray and the carried goods, the semicircular anti-skid boss 1A is favorable for the follow-up countersunk head screw, and the semicircular anti-skid boss 1A also has the effect of the reinforcing rib, so that the bearing capacity of the panel can be increased.
Preferably, the dipping resin 15 comprises 100 parts by weight of epoxy resin, 50 to 80 parts by weight of curing agent and 0.5 to 2 parts by weight of internal release agent. The glue dipping resin 15 adopts epoxy resin, so that the panel 1 has strong environmental adaptability, and is not influenced by humidity, water, salt, acid, ultraviolet rays and the temperature of-60-70 ℃, and the service life is long. The epoxy resin has high strength, so that the tensile strength of the tray panel 1 can reach more than 400Mpa, and the tensile modulus can reach more than 30Gpa, which is at least 10 times of that of a plastic tray, so that the tray has high bearing capacity, light self weight and long service life.
Example 2
A process flow chart of the continuous production method of the light-weight high-strength pallet panel 1 is shown in fig. 7, and the method comprises the following steps:
step one, designing a layer structure of a panel 1; panel 1 is from last to including surperficial fibrous layer 11, middle enhancement layer 12, continuous fiber layer 13 and knitting felt layer 14 down in proper order, surperficial fibrous layer 11 is 45 biaxial fibre layer structures, middle enhancement layer 12 is 0 and 90 biaxial fibre layer structures.
Step two, the yarn count of the yarns of the surface fiber layer 11 and the middle reinforcing layer 12 of the panel is calculated, and the yarn count is equal to the cross-sectional area (mm) of the pallet panel2) Gamma tray panel density (cm)2(g) weight of fiber set by the gamma tray panel (g) -weight of knit felt (g) ] -density of fiber yarn (g/m). Wherein the holderThe weight of the fiber set by the tray panel is 70-75 percent of the total weight of the tray panel, the density of the fiber yarn is 1.9-2.0 g/m, and the density of the tray panel is 300-600 g/m2。
Step three, the yarns with the yarn count checked in the step two sequentially, uniformly and crosslessly penetrate into a yarn splitting plate of pultrusion continuous forming equipment, then enter into a preforming plate of the pultrusion continuous forming equipment, and enter into a cavity of a heated forming die after preforming; and simultaneously, injecting gum dipping resin into the cavity of the forming mold, soaking yarns, and filling the gum dipping resin into the forming mold to form a panel blank.
Continuously drawing the panel blank molded in the molding die out of the fixedly placed molding die at the speed of 20-70cm/min, and sequentially passing through a pre-curing area, a curing area and a post-curing area of continuous pultrusion equipment to form a continuous panel; the temperature of the pre-curing zone is 80-100 ℃, the temperature of the curing zone is 140-170 ℃, and the temperature of the post-curing zone is 150-170 DEG C
And fifthly, in the post-curing area or a cutting area arranged behind the post-curing area, cutting the continuous panel with the fixed width into a panel body with the specified specification of the tray.
The pultrusion continuous forming equipment sequentially comprises a fixedly arranged yarn threading plate, a pre-formed plate, a forming die, a pre-curing area table board, a post-curing area table board and a traction device, continuous production can be realized, the production efficiency is high, a panel of a tray can be produced within 2min, the length of the panel can be cut into any size, a pair of dies can be realized, the production of tray panels with various length specifications can be met, and the development cost is greatly reduced. For example, the width of the forming die is 1 meter, and the tray can be made into a standard tray with the length of 1m × 1m, 1m × 1.1m and 1m × 1.2m, or a customized tray with any length. Compared with the mode of adopting a dipping tank, the mode of impregnating yarns by impregnating resin infusion has no volatile substance overflow, is environment-friendly in production, has high material use efficiency, and improves the resin utilization rate by at least 3 percent compared with the mode of adopting the dipping tank; foreign matters such as moisture and dust can not enter the panel in the production process, and the production quality is stable. The glue dipping resin adopts epoxy resin, so that the panel has strong environmental adaptability, and is not influenced by humidity, water, salt, acid, ultraviolet rays and the temperature of-60-70 ℃, and the service life is long. The epoxy resin has high strength, so that the tensile strength of the tray panel can reach more than 400Mpa, and the tensile modulus can reach more than 30Gpa, which is at least 10 times of that of the plastic tray, so that the tray has high bearing capacity, light self weight and long service life.
Example 3
A light high-strength tray is shown in figures 5-6 and comprises a light high-strength tray panel 1 and supporting legs 2 symmetrically arranged at two sides of the lower surface of the panel 1 along the width direction of the panel, wherein the supporting legs 2 comprise fumigating wood 22 with outer film resin 21 soaked on the surface, grooves 23 for containing reinforcing ribs are formed in the upper surface of the fumigating wood, and rubber wear-resistant rubber pads 24 are arranged on the lower surface of the fumigating wood. The panel 1 is of a solid integral structure, is formed by continuous FRP pultrusion, has various properties, utilizes the continuous fiber direction as the strongest direction, and sets the continuous fiber direction as the entering and exiting direction of the forklift, so that the maximum material design utilization rate is achieved, and the impact resistance is high. The outer part of the supporting leg is provided with a resin protective layer of the outer membrane of the fumigating wood, so that moisture is prevented from entering the fumigating wood, the fumigating wood is prevented from being corroded, and the fumigating wood cannot generate biological propagation. The contact surface of the supporting leg 2 and the ground is provided with a rubber wear-resistant rubber pad 24, so that the outer film resin 21 protective layer 22 is prevented from directly contacting the ground, and the resin film of the supporting leg 2 is protected; and timber compressive strength is high, and the tray bearing capacity is stronger, and the direction of supporting legs 2 is the width direction that panel rerum natura is weaker, has improved the transverse strength of tray from the side face.
The light high-strength pallet is light in weight and high in strength, and when the weight of the pallet is the same as that of a plastic pallet, the weight of the pallet is 60% -80% of that of a steel pallet, and the weight of the pallet is 30% -50% of that of the plastic pallet; the tensile strength in the strongest direction is more than 20 times that of plastic and more than 3 times that of common steel; the tray has excellent weather resistance and corrosion resistance, basically has no damage to the tray in ultraviolet and high humidity environments, has long service life which can be estimated conservatively and can be more than 5 years, and is convenient to maintain and easy to clean the surface.
Example 4
A method for assembling a lightweight high-strength pallet according to claim 4, wherein the flow chart is shown in fig. 8, comprising the steps of:
s1, producing the light high-strength tray panel body according to the continuous production method of the light high-strength tray panel;
s2, grinding the bonding position of the panel body, and removing the surface area smoothness of the combination of the panel body and the supporting legs by using sand paper according to a process file;
s3, preparing supporting legs 2 with the same width as the panel body, or directly taking the supporting legs 2 with the same width as the panel body;
s4, gluing, namely coating structural adhesive on the upper surfaces of the grooves 23 of the supporting legs 2, installing the structural adhesive on the left side and the right side of the lower surface of the panel according to the position of the panel reinforcing ribs 1B, compacting, and fixing by using flat head screws;
the order of the S3 may be interchanged with the order of the S1 or S2.
Preferably, the S3 is to prepare the supporting foot 2 with the same width as the main body of the panel 1, and further comprises the following steps:
s3.1, taking the fumigation wood matched with the specification of the panel 1 body, and grooving 23 according to the position of the reinforcing rib 1B on the lower surface of the panel 1;
s3.2, immersing the fumigated wood 22 into the fumigated wood outer film resin 21, and hanging the fumigated wood 22 by using a hook, air-cooling and curing for at least 0.5 hour;
the formula of the fumigated wood outer film resin 21 is as follows:
in order to facilitate an understanding of the invention, the invention is described in more detail below with reference to the accompanying drawings and specific examples. The preferred embodiments of the present invention are set forth in the specification and drawings, however, the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It should be noted that the above-described embodiments may enable those skilled in the art to more fully understand the present invention, but do not limit the present invention in any way. Therefore, although the present invention has been described in detail with reference to the drawings and examples, it will be understood by those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a high-strength light pallet panel, a serial communication port, includes the body, the body includes surface fiber layer, middle enhancement layer, continuous fiber layer and the knitting felt layer by the gum dipping resin parcel from last to down in proper order on the length direction of body, surface fiber layer is 45 biaxial fibre layer structures of putting, middle enhancement layer is 0 and 90 biaxial fibre layer structures of putting.
2. The lightweight high-strength pallet panel according to claim 2, wherein the upper surface of said body is uniformly provided with semi-circular anti-slip bosses, and the lower surface of said body is uniformly provided with reinforcing ribs along the length direction thereof.
3. The lightweight high-strength pallet panel according to claim 1 or 2, wherein the dip resin comprises 100 parts by weight of an epoxy resin, 50 to 80 parts by weight of a curing agent and 0.5 to 2 parts by weight of an internal mold release agent.
4. A light high-strength tray, characterized in that, includes claim 1 or 2 the light high-strength tray panel, still include in the lower surface of panel along its width direction evenly set up two at least supporting legss, the supporting legs includes the stifling wood that the surface has infiltrated adventitia resin, and its upper surface is equipped with and is used for holding the groove of strengthening rib, and the lower surface is installed rubber wear-resisting cushion.
5. A continuous process for the production of lightweight high-strength pallet panels according to claim 1 or 2, comprising the steps of:
step one, designing a layer structure of a panel; the panel includes surperficial fibrous layer, middle enhancement layer and knitting felt layer from last to down in proper order, the surperficial fibrous layer is 45 biaxial fibre layer structures, middle enhancement layer is 0 and 90 biaxial fibre layer structures.
Step two, performing a yarn count calculation of the yarns of the fiber layer and the middle reinforcing layer on the surface of the panel,
step three, the yarns with the yarn count checked in the step two sequentially, uniformly and crosslessly penetrate into a yarn splitting plate of pultrusion continuous forming equipment, then enter into a preforming plate of the pultrusion continuous forming equipment, and enter into a cavity of a heated forming die after preforming; simultaneously, injecting gum dipping resin into the cavity of the forming mold, soaking yarns, and filling the gum dipping resin into the forming mold to form a panel blank;
continuously drawing the panel blank molded in the molding die out of the fixedly placed molding die at the speed of 20-70cm/min, and sequentially passing through a pre-curing area, a curing area and a post-curing area of continuous pultrusion equipment to form a continuous panel;
and fifthly, in the post-curing area or a cutting area arranged behind the post-curing area, cutting the continuous panel with the fixed width into a panel body with the specified specification of the tray.
6. The continuous production method of a lightweight high-strength pallet panel according to claim 5, wherein the count of yarns in the second step is counted, and the count of yarns is [ the cross-sectional area (mm) of the pallet panel ]2) Gamma tray panel density (cm)2Gamma tray panel settingFiber weight-weight of knit felt ÷ fiber yarn density (g/m).
7. The continuous production method of the light-weight high-strength pallet panel according to claim 6, wherein the weight of the fibers set for the pallet panel is 70-75% of the total weight of the pallet panel, the density of the fiber yarns is 1.9-2.0 g/m, and the density of the pallet panel is 300-600 g/m2。
8. The continuous production method of a lightweight high-strength pallet panel according to any one of claims 5 to 8, characterized in that the temperature of the pre-curing zone is 80 ℃ to 100 ℃, the temperature of the curing zone is 140 ℃ to 170 ℃, and the temperature of the post-curing zone is 150 ℃ to 170 ℃.
9. A method for assembling a lightweight high-strength pallet according to claim 4, comprising the steps of:
s1, producing the light high-strength tray panel body according to the continuous production method of the light high-strength tray panel in the claim 5;
s2, grinding the bonding position of the panel body, and removing the surface area smoothness of the combination of the panel body and the supporting legs by using sand paper according to a process file;
s3, preparing supporting legs with the width consistent with the width of the panel body, or directly taking the supporting legs with the width consistent with the width of the panel body;
s4, gluing, namely coating structural adhesive on the upper surfaces of the grooves of the supporting legs, installing the structural adhesive on the left side and the right side of the lower surface of the panel according to the positions of the panel reinforcing ribs, compacting, and fixing by using flat head screws;
the order of the S3 may be interchanged with the order of the S1 or S2.
10. The assembling method of the lightweight high-strength pallet according to claim 9, wherein the S3 preparing the supporting legs having the same width as the panel body further comprises the steps of:
s3.1, taking the fumigation wood matched with the specification of the panel body, and slotting according to the position of the reinforcing rib on the lower surface of the panel;
s3.2, immersing the fumigated wood into the fumigated wood outer membrane resin, and hanging the fumigated wood with a hook for air cooling and curing for at least 0.5 hour;
the formula of the fumigating wood outer film resin is as follows:
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