KR20170089725A - Method of making frp impeller - Google Patents

Method of making frp impeller Download PDF

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Publication number
KR20170089725A
KR20170089725A KR1020160010332A KR20160010332A KR20170089725A KR 20170089725 A KR20170089725 A KR 20170089725A KR 1020160010332 A KR1020160010332 A KR 1020160010332A KR 20160010332 A KR20160010332 A KR 20160010332A KR 20170089725 A KR20170089725 A KR 20170089725A
Authority
KR
South Korea
Prior art keywords
impeller
blade
roll
mold
frp
Prior art date
Application number
KR1020160010332A
Other languages
Korean (ko)
Inventor
윤권중
Original Assignee
윤권중
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 윤권중 filed Critical 윤권중
Priority to KR1020160010332A priority Critical patent/KR20170089725A/en
Publication of KR20170089725A publication Critical patent/KR20170089725A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—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
    • 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
    • B29C70/34—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 shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
    • 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
    • B29C70/34—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 shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
    • B29C70/345—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 shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using matched moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D99/00—Subject matter not provided for in other groups of this subclass
    • B29D99/0025—Producing blades or the like, e.g. blades for turbines, propellers, or wings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/026—Selection of particular materials especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/06—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being hot or corrosive, e.g. liquid metals

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The present invention relates to an FRP pump impeller manufactured by using a roll-shaped FRP sheet impregnated with FRP (Fiber Reinforced Plastics), which is manufactured by a left-right bending method in which layer layers are laminated in an impeller blade groove formed in a metal mold to improve the strength of the impeller blades And an impeller according to the method.

Description

METHOD OF MAKING FRP IMPELLER [0002]

The present invention relates to an FRP pump impeller manufacturing method in which the strength of an impeller blade is improved by stacking layers in an impeller blade groove formed in a mold using a roll-shaped FRP sheet impregnated with FRP (Fiber Reinforced Plastics) And an impeller based thereon.

In the pumps used in environmental facilities such as wastewater treatment, steel, chemical and plating, a vertical type pump in which an electric motor is mounted on a main body or a horizontal type pump in which a motor and a pump are installed in common upper half are used. In order to be used for a long period of time in the same corrosive environment, pumps are manufactured using non-metallic materials, which are highly resistant to corrosion, with almost all liquid-contacted parts except motors.

At this time, the impeller is manufactured by selecting FRP (Fiber Reinforced Plastics) as a base metal. First, two molds for molding the front plate and the rear plate 200 constituting the impeller are prepared, The fiber bundles are cut to a predetermined size and filled into respective molds. After natural or forced cooling and curing, the cured front and back plates are separated from each mold, and then the front plate and the back plate are bonded Thereby completing one impeller.

The finished impeller has poor internal cohesive force and durability, and therefore, there is a problem that the blade portion constituting the impeller is easily damaged.

In order to solve the above-mentioned problem, a method of manufacturing a FRP impeller for a pump of Patent No. 1170361 has been proposed.

In the impeller manufacturing method, the FRP is filled in an impeller mold by using a chop mat cut into several pieces, and then the two molds are coupled to each other, pressed with a press device, cooled, and cured to produce an impeller.

The above-mentioned manufacturing method is advantageous in that it is easy to manufacture by filling the FRP mat cut into the wing grooves and pressing with a press, but in the case of the FRP material, the resin is applied while stacking the glass fibers, When I cut it with a matt one, there was a drop of the strength of the wing.

The factors that determine the strength of the RFP are resin, cement, and glass fiber, which function as reinforcing steel reinforcement. After curing, strength is determined. However, in the case of mats cut into several pieces, the glass fiber with reinforcing function is cut into several pieces Since a mat is filled, the mat is not evenly distributed over the whole, and therefore, the strength is reduced.

Patent Registration No. 10-1170361

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a method of improving the strength of a wing by changing the type of a base mat, So as to reinforce the foundation of the wing and to provide an impeller excellent in strength.

In order to achieve the above object, a method of manufacturing an FRP pump impeller according to the present invention is a method of manufacturing a FRP pump impeller using laminated layers in an impeller blade groove by using a roll mat, and a laminated sheet is manufactured by increasing the inner thickness of the impeller blades, Are reinforced by the mutual adhesion of each other, thereby enhancing the strength of the impeller.

The impeller manufactured by the method of manufacturing the FRP pump impeller according to the present invention is excellent in the strength of the impeller blades since the impeller is manufactured by stacking the layer layers using the roll mat, and the rolled mats are folded to the left and right while the folded mats are stacked The wing foundation reinforcement can be completed perfectly.

1 is a manufacturing process diagram according to the present invention.
2 is an illustration of an impeller front and rear mold according to the present invention.
3 is an exemplary view showing a state in which an FRP roll mat is laminated on a metal mold according to the present invention
Fig. 4 is an exemplary view showing a state in which FRP roll mats are laminated on a metal mold according to the present invention and folded to the left and right. Fig.
5 is a side view showing a state in which the mold FRP roll mat according to the present invention is folded to the left and right.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

First, the pump to be referred to in the present invention is a pump used for a feed pump, a sump pit, a scrubber spray, and various kinds of water treatment and drainage of general industry and chemical industry. The impeller of the present invention, A front body having a plurality of front wings arranged in front of the circular plate, a rear body having a plurality of rear wings arranged at the rear of the rear body, and a rear body having a central axis coupling portion, The coupling parts are interconnected.

FIG. 1 is a view showing a manufacturing process according to the present invention, FIG. 2 is an illustration of an impeller front and a rear mold according to the present invention, FIG. 3 is an example of a state in which an FRP roll mat is laminated on a mold according to the present invention, Fig. 5 is a side view showing a state in which the FRP roll mat is folded to the left and right according to the present invention. Fig.

As shown in FIGS. 1 to 5, a method of manufacturing an impeller according to the present invention includes: preparing a front mold and a rear mold; Working the mold with a gelcoat; Inserting an FRP roll mat into the wing grooves of the front and rear molds; Bending the upper end of the inserted roll mat to the left and right; Pressing the rolled mats on the folded rolls with the rollers, filling the front and rear molds with a roll mat, and curing the FRP roll mats by combining the two molds; And after completion of the curing, the mold is separated to complete the finished FRP pump impeller.

The step of preparing the front and rear molds includes a front mold 10 having a wing groove (cavity) 4 for forming an impeller blade and a disc-shaped body portion in which the wing groove extends, And a rear mold 12 having a disk-shaped body portion in which the blade groove extends, are prepared, and the blade groove and the body portion are cleanly cleaned with a brush, washing water or the like.

After cleaning the front and rear molds, the gel coat is evenly applied to the mold for the outer surface of the impeller and then cured.

After the work of the gel coat, the roll mat 6 in the form of a roll is inserted into the blade groove 4, and the blade is closely laminated on the left and right wall surfaces of the blade groove to sequentially laminate the blades to increase the thickness of the blade.

The upper end of the roll mat laminated while closely contacting the wall surface of the blade groove is folded to the right and left portions at right angles to the wall surface of the blade groove to laminate the blade while increasing the thickness of the inside and the body portion.

At this time, the roll mat laminated in close contact with the wall surface of the wing groove is formed by sequentially folding the roll mat to be inserted into the neighboring wing grooves, so that the roll mat is complemented by the laminated roll mat so that the strength of the impeller wing is maximized It can be increased.

The roll mat of the present invention is a roll mat containing a plurality of sheets impregnated with FRP (Fiber Reinforced Plastics) so that each sheet is immersed in FRP resin and then taken out, or FRP resin is applied on the surface by using a brush or the like, Is a general term for resins having improved mechanical strength by incorporating a fiber base material in the resin, particularly a resin to which strong fibers such as glass fibers are added. It has a long lifetime and is light, strong and does not decay.

When the roll mat is inserted into the blade groove, the roll mat forming the body portion is folded upward to press the roll mat using a roller so as to remove the air bubbles therein, and at the same time, the roll mat to be laminated is bonded without space.

A roll mat is laminated on a front mold and a rear mold, and then the two molds are cemented to each other, and after the curing, the mold is separated to complete the impeller.

As described above, the method of manufacturing an FRP pump impeller according to the present invention is described in the above description and drawings, but the present invention is not limited to the above description and drawings, It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

4: Wing home
6: Roll mat 10: Front mold
12: Rear mold

Claims (2)

A front mold having a blade groove for forming an impeller blade and a disk-shaped body portion extending from the blade groove; a rear mold having a blade groove for forming a rear blade and a disk-shaped body portion for extending the blade groove, A step of laminating the roll mats in close contact with the left and right wall surfaces of the wing grooves formed in the front and rear dies so as to increase the thickness of the inside of the wing while working the impeller wing A step of folding the upper end of the roll mat laminated in close contact with the wall surface of the blade into a left and right portion bent at a right angle to the blade wall surface to increase the thickness of the blade and the body portion; The roll mats which are laminated at the same time while removing air bubbles inside the roll mats And pressing the mold with the roll mat to cure the two molds of the front and rear molds which have been laminated to each other to cure the mold, and to separate the mold after curing to complete the impeller. The impeller blade according to claim 1, wherein the upper end of the roll mat closely adhered to the wall surface of the vane groove is complementary to the roll mat inserted in the neighboring vane grooves and the roll mat laminated to be stacked sequentially, So that the strength of the FRP pump impeller can be increased as much as possible.
KR1020160010332A 2016-01-27 2016-01-27 Method of making frp impeller KR20170089725A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020160010332A KR20170089725A (en) 2016-01-27 2016-01-27 Method of making frp impeller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160010332A KR20170089725A (en) 2016-01-27 2016-01-27 Method of making frp impeller

Publications (1)

Publication Number Publication Date
KR20170089725A true KR20170089725A (en) 2017-08-04

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KR1020160010332A KR20170089725A (en) 2016-01-27 2016-01-27 Method of making frp impeller

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102436216B1 (en) * 2022-02-24 2022-08-25 비강이앤비(주) boss integral impeller assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102436216B1 (en) * 2022-02-24 2022-08-25 비강이앤비(주) boss integral impeller assembly

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