CN111016218B - Preparation method of composite material lifting lug and composite material lifting lug - Google Patents
Preparation method of composite material lifting lug and composite material lifting lug Download PDFInfo
- Publication number
- CN111016218B CN111016218B CN201911424610.3A CN201911424610A CN111016218B CN 111016218 B CN111016218 B CN 111016218B CN 201911424610 A CN201911424610 A CN 201911424610A CN 111016218 B CN111016218 B CN 111016218B
- Authority
- CN
- China
- Prior art keywords
- ear hole
- vacuum
- lifting lug
- composite material
- glass fiber
- 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.)
- Active
Links
Images
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
- B29C70/30—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
- B29C70/36—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 and impregnating by casting, e.g. vacuum casting
-
- 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
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
Abstract
The invention aims to provide a preparation method of a composite material lifting lug and the composite material lifting lug, and the technical problems that an ear hole is not easy to open and the structural strength of the ear hole is too low in the preparation process of the existing composite material lifting lug are solved by adopting a new lifting lug preparation process; the method comprises the following steps: preparing an ear hole column, wherein the length of the ear hole column is 10-30 mm greater than the depth of the ear hole; coating a release agent, and coating the release agent on the mold cavity for 1 to 2 times; marking the setting position of the ear hole: assembling the ear hole columns, and coating the release agent on the exposed surfaces of the adhered ear hole columns for 1 to 2 times; laying a first glass fiber cloth layer, and forming hollow holes matched with the cross section of the ear hole column in the interference parts on the glass fiber cloth layer; laying auxiliary first vacuum forming material: vacuum infusion molding: and after the injection molding is finished, the vacuum is introduced into a mold to be naturally cooled at room temperature to obtain an injection molded finished product. The composite material lifting lug with excellent structural strength can be obtained more easily.
Description
Technical Field
The invention relates to the technical field of lifting lug forming, in particular to a preparation method of a composite lifting lug and the composite lifting lug.
Background
The underwater composite material protective cover product needs lifting lugs to facilitate hanging of the hanging strips in the transportation and launching processes, and the lifting lugs are relatively high in requirements on the arrangement positions and structural performance of the lifting lugs due to the fact that the lifting lugs are subjected to external forces such as the self weight of the product and sea wind. The shaping thickness of combined material lug among the prior art is thicker, for satisfying the structural demand in lug position, need the circular opening of cutting behind the integrated into one piece when the shaping, because of waiting the structural performance intensity of cutting the position higher, causes the cutting very difficult, and the size easily forms great deviation in the operation process, and then leads to the fact certain influence to follow-up hoist and mount. The vacuum leading-in process is one of important manufacturing methods for manufacturing the composite material, plays a role in lifting weight in the preparation process of the glass fiber reinforced plastic, is not mature in technology in the aspect of manufacturing lifting lugs in the existing vacuum leading-in process, and the obtained lifting lugs are generally difficult to meet normal use requirements in the aspect of structural strength, so that the technical means still need to be adopted to obtain practical lifting lug products when underwater composite material protection cover products are manufactured. Furthermore, the local thickness of the existing composite material lifting lug usually exceeds 30mm, the existing tool is adopted to open the lug hole and is usually difficult to cut through, the processing difficulty is relatively large, and the lug hole is almost difficult to be manufactured by adopting a conventional punching method for the part with the thickness reaching 50 mm.
In addition, the earhole obtained by the cutting and punching method has irregular rough hole patterns on the hole wall, and a large amount of dust is generated in the additionally added earhole polishing process, so that adverse effects are caused on the environment and the health of operators.
Therefore, it is necessary to provide a method for manufacturing a composite material lug and a composite material lug.
Disclosure of Invention
The invention aims to provide a preparation method of a composite material lifting lug and the composite material lifting lug, and the technical problems that an ear hole is not easy to open and the structural strength of the ear hole is too low in the preparation process of the existing composite material lifting lug are solved by adopting a new lifting lug preparation process.
The invention provides a preparation method of a composite material lifting lug, which comprises the following steps:
step 1: preparing an ear hole column, wherein the cross section appearance of the ear hole column is matched with the ear hole appearance of the composite material lifting lug; the length of the ear hole column is greater than the depth of the ear hole;
step 2: coating a release agent, namely coating the release agent on a clean cavity of a vacuum introduction mould;
and step 3: marking the arrangement position of the ear hole, and marking the arrangement position of the ear hole in the die cavity;
and 4, step 4: assembling an ear hole column, and bonding the bottom surface of the ear hole column on the arrangement position of the marked ear hole; coating the release agent on the exposed surface of the ear hole column after bonding;
and 5: laying a first glass fiber cloth layer, and laying the glass fiber cloth layer in the inner cavity of the mold cavity; when the glass fiber cloth layer is interfered with the arrangement position of the ear hole column, a hollow hole matched with the cross section shape of the ear hole column is formed in the interference position on the glass fiber cloth layer;
step 6: laying auxiliary first vacuum forming materials, and laying above the glass fiber cloth layer in sequence: the device comprises a first demoulding cloth, a first flow guide net, a first glue injection pipe, a first glue absorption pipe and a first vacuum film; the first glue injection pipes are arranged above the first flow guide net at equal intervals; the first rubber suction pipe is arranged at the edge part of the first flow guide net; the first vacuum film is used for sealing the upper end opening of the mold cavity;
and 7: performing vacuum infusion molding, namely introducing an injection molding raw material into the mold cavity through the glue injection pipe, and sucking the glue injection pipe before the injection molding raw material is introduced into the first glue injection pipe to provide enough negative pressure for the injection molding raw material to be uniformly distributed in the mold cavity; after the injection molding is finished, the vacuum is introduced into a mold and naturally cooled at room temperature to obtain an injection molded finished product;
the operation sequence is not distinguished in the steps 1 to 7, and two operation steps which are not sequentially related to each other in the front-back operation are also suitable for being simultaneously and parallelly operated and processed.
Further, the length of the ear hole pillar is 10 to 30mm greater than the depth of the ear hole.
Further, the release agent is applied 1 to 2 times.
Furthermore, the rubber suction pipe detects the condition that the first vacuum film seals the upper end opening of the mold cavity before suction is performed before the rubber suction pipe introduces the injection molding raw material, and suction is performed only on the premise that the upper end opening of the mold cavity is determined to be completely sealed.
Further, when the negative pressure of the glue injection pipe in the mold cavity reaches a set value, the injection molding raw material is introduced into the mold cavity.
Further, the hardness of the lug hole column is smaller than the structural strength of the finished composite lifting lug product.
Further, the ear hole column is a plastic cylinder.
Further, in the step: in the 'assembling earhole column', glue solution adopted for bonding the earhole column is putty or 502 glue solution.
Further, the number of the layers of the glass fiber cloth layer is 5 to 15.
Furthermore, the first vacuum film is of a double-layer film structure, and an air guide felt is arranged between the upper vacuum film and the lower vacuum film.
Further, the method also comprises the following operation steps:
and 8: laying a lifting lug part reinforcing structure, and laying a second glass fiber cloth layer at the arrangement position of the ear hole of the injection molding finished product;
and step 9: laying a second auxiliary vacuum forming material, and sequentially laying a second demolding cloth, a second flow guide net, a second glue injection pipe and a second vacuum film above the second glass fiber cloth layer; the second glue injection pipes are arranged above the second flow guide net at equal intervals; the second glue suction pipe is arranged at the edge part of the second flow guide net; the second vacuum film is used for sealing the laying part of the second glass fiber cloth layer;
step 10: the lifting lug part is formed in a vacuum infusion mode, injection molding raw materials are introduced into the laying part of the second glass fiber cloth layer through the second glue injection pipe, the second glue injection pipe performs suction before the injection molding raw materials are introduced into the second glue injection pipe, and sufficient negative pressure is provided for the injection molding raw materials to be uniformly distributed in the laying part of the second glass fiber cloth layer; and after the injection molding is finished, naturally cooling and demolding the vacuum guide mold at room temperature, and removing the ear hole column to obtain a finished product of the composite material lifting lug.
Further, the second vacuum film is of a double-layer film structure, and an air guide felt is arranged between the upper vacuum film and the lower vacuum film.
Further, the number of the second glass fiber cloth layer is 50 to 70.
Furthermore, the cross section of the second glue injection pipe is in an omega shape, and an opening at the lower end of the second glue injection pipe is used for seepage of injection molding raw materials.
Further, the cross section of the first glue injection pipe is in an omega shape; the opening at the lower end of the first glue injection pipe is used for seepage injection molding raw materials.
The invention further provides a composite material lifting lug on the basis of the scheme, and the composite material lifting lug is manufactured by the method.
Further, the structure of the lifting lug comprises: the ear base is formed by vacuum drainage injection molding and a through hole is formed in the ear base; the ear mount includes: a body and a connecting portion; the through hole is arranged on the body; the connecting part is integrally connected with the body.
Furthermore, the body and the connecting portion jointly enclose a three-dimensional structure shape which comprises three side faces, and any one side face is connected with the other two side faces.
Furthermore, the wall thickness of the part of the body for arranging the through hole is larger than the wall thicknesses of the rest parts of the body and the connecting part.
Compared with the prior art, the preparation method of the composite material lifting lug provided by the invention has the following progress:
the preparation method of the composite material lifting lug provided by the invention has the technical advantages that: the molding process is simple and easy to operate; the ear hole can be directly formed in the forming process, and the obtained ear hole is accurate in position; the obtained finished product of the earhole has smooth hole wall and does not need secondary processing. Furthermore, the lug manufactured by the manufacturing method of the composite material lug can break through the manufacturing limitation of the original manufacturing process on the thickness of the inner wall of the lug, can obtain a lug product with any thickness according to the structural strength requirement, and can widen the application space of the existing composite material lug.
Furthermore, the plastic cylinder is used as the ear hole column, the structural strength of the plastic cylinder is far lower than that of the formed composite material, the ear hole column can be conveniently removed from the ear hole in a die by means of external force after forming, and then the finished product of the composite material lifting lug after demoulding is obtained.
Furthermore, the invention adopts the putty or the 502 glue to adhere the earhole pillar, can keep enough adhesive strength when vacuum introduction injection molding is carried out, and can easily remove the earhole pillar from the earhole by means of external force after the injection molding is finished.
Furthermore, after the composite material lifting lug is prepared by adopting 5-15 layers of glass fiber cloth layers, the obtained finished product of the composite material lifting lug can fully meet the daily transportation and launching hoisting requirements of the underwater composite material protective cover in the aspect of structural strength.
Furthermore, the vacuum film with the double-layer film structure and the air guide felt can avoid the adverse effect on the quality of the finished product of the composite material lifting lug caused by a small amount of air remained between the two layers of vacuum films due to local adhesion when the vacuum films are sucked by the rubber suction pipe.
Furthermore, as the structural size of part of the underwater composite material protective cover is larger, the requirement on the structural strength of the lifting lug is higher during hoisting, and the structural strength of the finished composite material lifting lug can be greatly enhanced by the preparation process of locally arranging the reinforcing structure at the ear hole position of the lifting lug. The preparation method of the composite material lifting lug is further adopted in the related preparation process, and 50-70 layers of second glass fiber cloth are adopted for vacuum introduction and injection molding, so that the obtained new finished product is firmer and more reliable in structural stability.
Furthermore, a pipeline with the cross section in an omega-shaped shape is used as the glue injection pipe, when the injection molding raw material is introduced in vacuum, the injection molding raw material can be more uniformly guided to the flow guide net, and the obtained composite material formed by the injection molding raw material and the glass fiber cloth layer is more uniform in material and better in structural strength.
The composite material lifting lug provided by the invention is simple in manufacturing process, high in structural strength and low in manufacturing cost, and can meet the use requirement of daily lifting.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is an operation flowchart of a method for manufacturing a composite lifting lug according to embodiment 1 of the present invention;
fig. 2 is a flowchart of a local structural reinforcement operation of the method for manufacturing a composite lifting lug according to embodiment 2 of the present invention;
FIG. 3 is a schematic structural view of a second vacuum film in example 2 of the present invention;
fig. 4 is a schematic structural view of a composite material lug manufactured in example 3 of the present invention;
FIG. 5 is an isometric view of the structure of the composite lifting lug of FIG. 4 from another perspective;
FIG. 6 is a schematic structural view of the composite lifting lug of FIG. 4 prior to removal of the ear-hole post;
FIG. 7 is a schematic structural view of the composite material lifting lug of FIG. 4 after being partially structurally reinforced;
fig. 8 is a schematic structural diagram of a die required for manufacturing the composite lifting lug shown in fig. 7 before a demolding operation.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1, the present invention provides a method for manufacturing a composite material lifting lug, including the following steps:
preparing an ear hole column: the cross section of the lug hole column is matched with the lug hole of the composite material lifting lug in shape; the length of the ear hole column is 10 to 30mm greater than the depth of the ear hole;
coating a release agent: coating a release agent on a clean cavity of a vacuum leading-in mould for 1 to 2 times;
marking the setting position of the ear hole: marking the arrangement position of the ear hole in the die cavity;
assembling the ear hole column: bonding the bottom surface of the ear hole column to the marked arrangement position of the ear hole; coating the release agent on the exposed surface of the ear hole pillar after bonding for 1 to 2 times;
laying a first glass fiber cloth layer: laying a glass fiber cloth layer in the inner cavity of the mold cavity; when the glass fiber cloth layer is interfered with the arrangement position of the ear hole column, a hollow hole matched with the cross section shape of the ear hole column is formed in the interference position on the glass fiber cloth layer;
laying auxiliary first vacuum forming material: laying above the glass fiber cloth layer in sequence: the device comprises a first demoulding cloth, a first flow guide net, a first glue injection pipe, a first glue absorption pipe and a first vacuum film; the first glue injection pipes are arranged above the first flow guide net at equal intervals; the first rubber suction pipe is arranged at the edge part of the first flow guide net; the first vacuum film is used for sealing the upper end opening of the mold cavity;
vacuum infusion molding: performing vacuum infusion molding, namely introducing an injection molding raw material into the mold cavity through the glue injection pipe, and sucking the glue injection pipe before the injection molding raw material is introduced into the first glue injection pipe to provide enough negative pressure for the injection molding raw material to be uniformly distributed in the mold cavity; and after the injection molding is finished, the vacuum is introduced into a mold to be naturally cooled at room temperature to obtain an injection molded finished product.
It should be noted that the above operation steps do not distinguish the order of operation, and two operation steps that are not sequentially associated with each other in the preceding and subsequent operations are also suitable for simultaneous parallel operation processing.
Preferably, in one preferred embodiment of the present invention, the method comprises the following steps: in the 'assembling earhole column', glue solution adopted for bonding the earhole column is putty or 502 glue solution.
Preferably, in one preferred embodiment of the present invention, the number of the glass fiber cloth layers is 5 to 15.
Preferably, in one of the preferable technical solutions of the present application, the first vacuum film is a double-layer film structure, and an air guide felt is disposed between the upper and lower vacuum films.
Preferably, in one of the preferable technical solutions of the present application, the cross-sectional profile of the first glue injection pipe is in an "Ω" shape; the opening at the lower end of the first glue injection pipe is used for seepage injection molding raw materials.
Preferably, the negative pressure range required by the uniform distribution of the injection molding raw material in the mold cavity is less than or equal to 15 mabr.
The preparation method of the composite material lifting lug in the embodiment has the following technical advantages: the molding process is simple and easy to operate; the ear hole can be directly formed in the forming process, and the obtained ear hole is accurate in position; the obtained finished product of the earhole has smooth hole wall and does not need secondary processing. Furthermore, the lug manufactured by the manufacturing method of the composite material lug can break through the manufacturing limitation of the original manufacturing process on the thickness of the inner wall of the lug, can obtain a lug product with any thickness according to the structural strength requirement, and can widen the application space of the existing composite material lug.
The improvement points of the above technical scheme are summarized as follows:
the invention adopts the plastic cylinder as the ear hole column, the structural strength of the plastic cylinder is far less than that of the formed composite material, the ear hole column is conveniently removed from the ear hole in a die by means of external force after forming, and then the finished product of the composite material lifting lug after demoulding is obtained.
2, the invention adopts the putty or the 502 glue to bond the earhole pillar, can keep enough bonding strength when vacuum introduction injection molding is carried out, and easily removes the earhole pillar from the earhole by external force after the injection molding is finished.
3, after the composite material lifting lug is prepared by adopting 5 to 15 layers of glass fiber cloth layers, the obtained finished product of the composite material lifting lug can fully meet the daily transportation and launching hoisting requirements of the underwater composite material protective cover in the aspect of structural strength.
4, the vacuum film with the double-layer film structure and the air guide felt can avoid the adverse effect on the quality of the finished product of the composite material lifting lug caused by a small amount of air remained between the two layers of vacuum films due to local adhesion when the vacuum films are sucked by the rubber suction pipe.
And 5, a pipeline with the cross section in an omega shape is used as the glue injection pipe, so that the injection molding raw material can be more uniformly guided to the flow guide net when the injection molding raw material is guided in vacuum, and the obtained composite material formed by the injection molding raw material and the glass fiber cloth layer is more uniform in material and better in structural strength.
Example 2:
as shown in fig. 2, this embodiment further includes the following operation steps based on embodiment 1:
the reinforced structure of the lifting lug position is laid: laying a second glass fiber cloth layer at the arrangement position of the ear hole of the injection molding finished product;
laying a second auxiliary vacuum forming material: laying a second demolding cloth, a second flow guide net, a second glue injection pipe and a second vacuum film above the second glass fiber cloth layer in sequence; the second glue injection pipes are arranged above the second flow guide net at equal intervals; the second glue suction pipe is arranged at the edge part of the second flow guide net; the second vacuum film is used for sealing the laying part of the second glass fiber cloth layer;
and (3) vacuum infusion molding of the lifting lug part: introducing an injection molding raw material into the laying position of the second glass fiber cloth layer through the second glue injection pipe, and sucking the second glue injection pipe before the injection molding raw material is introduced into the second glue injection pipe so as to provide sufficient negative pressure for the injection molding raw material to be uniformly distributed in the laying position of the second glass fiber cloth layer; and after the injection molding is finished, naturally cooling and demolding the vacuum guide mold at room temperature, and removing the ear hole column to obtain a finished product of the composite material lifting lug.
Preferably, as shown in fig. 3, in one preferred embodiment of the present invention, the second vacuum film is a double-layer film structure, and an air guide felt D is disposed between the upper and lower vacuum films M. When the vacuum is pumped, a vacuum pressure gauge is adopted to monitor the vacuum degree in the die cavity, the vacuum degree in the die cavity is pumped to be less than or equal to 15mabr, the index is unchanged after the vacuum pumping is continued, the vacuum of the second layer is pumped, the main pipeline of the vacuum glue sucking port of the first layer is closed, and after the vacuum pressure drop value is kept for 30min, the detection is qualified if the vacuum pressure drop value is less than or equal to 15 mbar. And opening the first layer of vacuum glue sucking port after the detection is qualified, and injecting the injection molding raw material into the glue injecting port after 20 minutes.
Preferably, in one preferred embodiment of the present invention, the number of the second glass fiber cloth layer is 50 to 70.
Preferably, in one of the preferable technical solutions of the present application, the cross-sectional shape of the second glue injection pipe is in an "Ω" shape, and an opening at a lower end of the second glue injection pipe is used for seepage of injection molding raw materials.
Because the structural dimension of part combined material safety cover under water is great, and the structural strength demand to the lug during hoist and mount is higher, this embodiment can strengthen the off-the-shelf structural strength of combined material lug by a wide margin to the preparation technology that lug ear hole position part set up reinforcing structure. Wherein, as the related preparation process further continues to use the preparation method of the composite material lifting lug in the above embodiment 1, the obtained new finished product is more firm and reliable in structural stability.
Example 3:
as shown in fig. 4 and 5, the present embodiment provides a composite material lifting lug, which is manufactured by the above method, and the structure of the lifting lug includes: the ear base comprises an ear base 100 formed by vacuum drainage injection molding and a through hole 110 arranged on the ear base 100; the ear mount 100 includes: a body 101 and a connecting portion 102; the through hole 110 is arranged on the body 101; the connecting portion 102 is integrally connected to the body 101.
Preferably, in one of the preferable technical solutions of the present application, the body and the connecting portion are integrally formed by vacuum injection molding. During manufacturing, as shown in fig. 6, the ear hole posts 111 are inserted into the through holes, and the ear hole posts 111 are removed before obtaining the finished product.
Preferably, as shown in fig. 4 to 7, in one preferred embodiment of the present invention, the body 101 and the connecting portion 102 together enclose a three-dimensional structure shape including three side surfaces, and any one side surface is respectively connected to the other two side surfaces. Preferably, a rounded corner is provided at a portion where the three side surfaces meet together.
Preferably, as shown in fig. 7, in one preferred embodiment of the present invention, the wall thickness of the body 101 at the portion where the through hole 110 is formed is greater than the wall thickness of the rest of the body 101 and the connecting portion 102.
Preferably, as shown in fig. 8, the vacuum induction injection molding is performed by using a mold 200 during the injection molding of the composite material lifting lug. Wherein, the shape of the mold 200 is matched with the shape of the lower surface of the body 101 and the connecting part 102. After the injection molding is completed, the composite material lifting lug is separated from the mold 200 by using a mold release agent used in advance, and the lug hole column (not shown in the figure) is removed, so that the finished composite material lifting lug shown in fig. 7 can be obtained.
The composite material lifting lug in the embodiment is simple in manufacturing process, high in structural strength and low in manufacturing cost, and can meet the use requirement of daily lifting.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A method for preparing a composite material lifting lug comprises the following steps:
step 1: preparing an ear hole column, wherein the cross section appearance of the ear hole column is matched with the ear hole appearance of the composite material lifting lug; the length of the ear hole column is greater than the depth of the ear hole;
step 2: coating a release agent, namely coating the release agent on a clean cavity of a vacuum introduction mould;
and step 3: marking the arrangement position of the ear hole, and marking the arrangement position of the ear hole in the die cavity;
and 4, step 4: assembling an ear hole column, and bonding the bottom surface of the ear hole column on the arrangement position of the marked ear hole; coating the release agent on the exposed surface of the ear hole column after bonding;
and 5: laying a first glass fiber cloth layer, and laying the glass fiber cloth layer in the inner cavity of the mold cavity; when the glass fiber cloth layer is interfered with the arrangement position of the ear hole column, a hollow hole matched with the cross section shape of the ear hole column is formed in the interference position on the glass fiber cloth layer;
step 6: laying auxiliary first vacuum forming materials, and laying above the glass fiber cloth layer in sequence: the device comprises a first demoulding cloth, a first flow guide net, a first glue injection pipe, a first glue absorption pipe and a first vacuum film; the first glue injection pipes are arranged above the first flow guide net at equal intervals; the first rubber suction pipe is arranged at the edge part of the first flow guide net; the first vacuum film is used for sealing the upper end opening of the mold cavity;
and 7: performing vacuum infusion molding, namely introducing an injection molding raw material into the mold cavity through the first glue injection pipe, and performing suction on the first glue injection pipe before the injection molding raw material is introduced into the mold cavity, so as to provide sufficient negative pressure for uniform distribution of the injection molding raw material in the mold cavity; after the injection molding is finished, the vacuum is introduced into a mold and naturally cooled at room temperature to obtain an injection molded finished product;
and 8: laying a lifting lug part reinforcing structure, and laying a second glass fiber cloth layer at the arrangement position of the ear hole of the injection molding finished product;
and step 9: laying a second auxiliary vacuum forming material, and sequentially laying a second demolding cloth, a second flow guide net, a second glue injection pipe and a second vacuum film above the second glass fiber cloth layer; the second glue injection pipes are arranged above the second flow guide net at equal intervals; the second glue suction pipe is arranged at the edge part of the second flow guide net; the second vacuum film is used for sealing the laying part of the second glass fiber cloth layer; the cross section of the second glue injection pipe is in an omega shape, and an opening at the lower end of the second glue injection pipe is used for seepage of injection molding raw materials;
step 10: the lifting lug part is formed in a vacuum infusion mode, injection molding raw materials are introduced into the laying part of the second glass fiber cloth layer through the second glue injection pipe, the second glue injection pipe performs suction before the injection molding raw materials are introduced into the second glue injection pipe, and sufficient negative pressure is provided for the injection molding raw materials to be uniformly distributed in the laying part of the second glass fiber cloth layer; and after the injection molding is finished, naturally cooling and demolding the vacuum guide-in mold at room temperature, and removing the lug hole column to obtain a finished product of the composite material lifting lug.
2. The method according to claim 1, characterized in that in step: in the 'assembling earhole column', glue solution adopted for bonding the earhole column is putty or 502 glue solution.
3. The method according to claim 1, wherein the first vacuum film is a double-layer film structure, and an air guide felt is arranged between the upper and lower vacuum films.
4. The method according to claim 1, wherein the second vacuum film is a double-layer film structure, and an air guide felt is arranged between the upper and lower vacuum films.
5. The method of claim 4, wherein the number of layers of the second fiberglass cloth layer is from 50 to 70.
6. The method as claimed in claim 1, wherein the cross-sectional profile of the first glue injection pipe is "Ω" -shaped; the opening at the lower end of the first glue injection pipe is used for seepage injection molding raw materials.
7. A composite shackle made by the method of any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911424610.3A CN111016218B (en) | 2019-12-31 | 2019-12-31 | Preparation method of composite material lifting lug and composite material lifting lug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911424610.3A CN111016218B (en) | 2019-12-31 | 2019-12-31 | Preparation method of composite material lifting lug and composite material lifting lug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111016218A CN111016218A (en) | 2020-04-17 |
| CN111016218B true CN111016218B (en) | 2021-08-17 |
Family
ID=70198126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911424610.3A Active CN111016218B (en) | 2019-12-31 | 2019-12-31 | Preparation method of composite material lifting lug and composite material lifting lug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111016218B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115635706B (en) * | 2022-12-26 | 2023-02-28 | 天津爱思达新材料科技有限公司 | Processing method of carbon fiber composite material part |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6620369B1 (en) * | 2000-02-09 | 2003-09-16 | Northrop Grumman Corporation | Net molding of resin composite parts |
| CN102358047A (en) * | 2011-11-08 | 2012-02-22 | 保定华翼风电叶片研究开发有限公司 | Method for manufacturing wind wheel blade by vacuum suction and injection |
| CN103496173A (en) * | 2013-09-11 | 2014-01-08 | 重庆大学 | Manufacturing method of composite material laminated plate with holes |
| US20140197569A1 (en) * | 2013-01-15 | 2014-07-17 | GM Global Technology Operations LLC | Method of fabricating a hole in a composite panel |
| CN105437567A (en) * | 2015-10-27 | 2016-03-30 | 北京金风科创风电设备有限公司 | Blade root end forming device and method |
| CN205185346U (en) * | 2015-11-16 | 2016-04-27 | 连云港顺吉橡塑制品有限公司 | Prevent omega shape glue injection pipe of indentation |
| CN105881932A (en) * | 2014-11-20 | 2016-08-24 | 北京玻钢院复合材料有限公司 | Method for forming large-sized composite material box |
| CN205931270U (en) * | 2016-08-22 | 2017-02-08 | 山东翔宇航空技术服务有限责任公司 | Water collector is consolidated to aircraft |
| CN106564202A (en) * | 2016-09-23 | 2017-04-19 | 中航复合材料有限责任公司 | Method for preparing hybrid composite U-shaped piece through vacuum leading-in forming |
| DE102016218896A1 (en) * | 2016-09-29 | 2018-03-29 | Technische Universität Dresden | Method and device for pre-hole insertion for the connection of fiber-plastic composites with each other and with other materials |
| US20180147797A1 (en) * | 2016-11-25 | 2018-05-31 | Safran Aircraft Engines | Method of fabricating an airfoil element out of composite material and having metal reinforcement fastened by riveting |
| CN108515711A (en) * | 2018-03-22 | 2018-09-11 | 江苏金风科技有限公司 | Vacuum perfusion process |
-
2019
- 2019-12-31 CN CN201911424610.3A patent/CN111016218B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6620369B1 (en) * | 2000-02-09 | 2003-09-16 | Northrop Grumman Corporation | Net molding of resin composite parts |
| CN102358047A (en) * | 2011-11-08 | 2012-02-22 | 保定华翼风电叶片研究开发有限公司 | Method for manufacturing wind wheel blade by vacuum suction and injection |
| US20140197569A1 (en) * | 2013-01-15 | 2014-07-17 | GM Global Technology Operations LLC | Method of fabricating a hole in a composite panel |
| CN103496173A (en) * | 2013-09-11 | 2014-01-08 | 重庆大学 | Manufacturing method of composite material laminated plate with holes |
| CN105881932A (en) * | 2014-11-20 | 2016-08-24 | 北京玻钢院复合材料有限公司 | Method for forming large-sized composite material box |
| CN105437567A (en) * | 2015-10-27 | 2016-03-30 | 北京金风科创风电设备有限公司 | Blade root end forming device and method |
| CN205185346U (en) * | 2015-11-16 | 2016-04-27 | 连云港顺吉橡塑制品有限公司 | Prevent omega shape glue injection pipe of indentation |
| CN205931270U (en) * | 2016-08-22 | 2017-02-08 | 山东翔宇航空技术服务有限责任公司 | Water collector is consolidated to aircraft |
| CN106564202A (en) * | 2016-09-23 | 2017-04-19 | 中航复合材料有限责任公司 | Method for preparing hybrid composite U-shaped piece through vacuum leading-in forming |
| DE102016218896A1 (en) * | 2016-09-29 | 2018-03-29 | Technische Universität Dresden | Method and device for pre-hole insertion for the connection of fiber-plastic composites with each other and with other materials |
| US20180147797A1 (en) * | 2016-11-25 | 2018-05-31 | Safran Aircraft Engines | Method of fabricating an airfoil element out of composite material and having metal reinforcement fastened by riveting |
| CN108515711A (en) * | 2018-03-22 | 2018-09-11 | 江苏金风科技有限公司 | Vacuum perfusion process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111016218A (en) | 2020-04-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107139504B (en) | Core mold and method for performing hat-shaped stringer made of composite material and curing stiffened wall plate of hat-shaped stringer | |
| US9205602B2 (en) | Method for producing fiber-reinforced plastic | |
| CN105121139A (en) | Device and method for producing a rotor blade belt | |
| CN101932432A (en) | Method for producing fuselage cell sections for aircraft with composite fibre materials, and a device | |
| CN111531919B (en) | Resin vacuum forming device and component preparation method | |
| CN112105813A (en) | Magnetically attached flange | |
| CN111016218B (en) | Preparation method of composite material lifting lug and composite material lifting lug | |
| CN111070503A (en) | Forming method, structure and forming die for carbon fiber component assisted by 3D printing technology | |
| CN108360304B (en) | Pulp molding product and local thickening process method | |
| CN110884165A (en) | Construction structure and method for improving resin enrichment of complex profile of composite web | |
| CN103358565A (en) | Composite material test piece sheet making die and method thereof | |
| CN112109345B (en) | Vacuum forming method based on connection of composite material and metal framework | |
| CN112477192A (en) | Forming method of high-rigidity conical-structure carbon fiber composite material pipe | |
| CN110667138A (en) | Reinforcing rib-containing carbon fiber antenna surface co-curing forming method | |
| US10486377B2 (en) | Method of moulding a composite article and mould | |
| CN115107201A (en) | Aviation composite material window frame cushion block die and window frame cushion block forming method | |
| CN1179840C (en) | Technological process for producing thick product of vacuum permeation formed composite material | |
| CN110435183B (en) | Integral forming method for glass fiber reinforced plastic double-layer flange | |
| CN111823449A (en) | Soft mold for precisely manufacturing inverted V-shaped composite material part | |
| CN207465924U (en) | A kind of mold for vacuum infusion molding | |
| CN110815868A (en) | Auxiliary plate suitable for vacuum introduction | |
| CN218749433U (en) | Aluminium system mould is used in shaping of fiber reinforced resin base | |
| CN213321826U (en) | Silica gel resin passage pipe | |
| CN212352598U (en) | Water pipe die | |
| CN218985825U (en) | High-strength carbon fiber composite material bottom plate and preparation mold thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |