KR20160081781A

KR20160081781A - The balance weight for elevator and manufacturing system thereof

Info

Publication number: KR20160081781A
Application number: KR1020150147603A
Authority: KR
Inventors: 한덕환
Original assignee: 한덕환
Priority date: 2014-12-31
Filing date: 2015-10-22
Publication date: 2016-07-08

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a balance weight for an elevator and a manufacturing system thereof, and more particularly to a balance weight for an elevator which is capable of producing a balance weight having a predetermined specific gravity by inputting powders or particles of sand, An elevator balance weight and its manufacturing system,
A production system for a balance weight for an elevator, comprising: a hopper for feeding a thermoplastic synthetic resin; A synthetic resin feeding line installed at a lower end of the hopper for supplying the synthetic resin and supplying the synthetic resin; And a screw conveyor mounted inside the synthetic resin feeding line for supplying the synthetic resin in a forward direction; A hopper for supplying a specific gravity; A specific gravity feeding line installed at a lower end of the hopper for the specific gravity feeder to feed the gravity feeder; And a screw conveyor mounted inside the non-body feeding line to feed the non-body forward; An injection port for injecting the synthetic resin supplied from the synthetic resin supply part and the non-gravity fed part together with the non-grained material; A mixing line provided at a lower end of the injection port; A screw mounted on the compounding line to agitate and blend the synthetic resin and the specific gravity; And a heater mounted on an outer peripheral surface of the compounding line and heating the compounding line at a temperature of 100 to 300 DEG C; A cutter for supplying a predetermined amount of the blend of the synthetic resin and the non-gravure body passed through the extruder; A metering unit configured to measure the weight of the blend supplied from the cutting unit, the metering unit being composed of a blending vessel, a load cell for measuring the weight of the blending vessel and the blending vessel, A balance weight mold part into which the compound passed through the metering part is injected; And a press for making a product by pressing the compound injected into the balance weight mold part.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a balance weight for an elevator,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a balance weight for an elevator and a manufacturing system thereof, and more particularly to a balance weight for an elevator which is capable of producing a balance weight having a predetermined specific gravity by inputting powders or particles of sand, The present invention relates to a balance weight for an elevator and a manufacturing system thereof.

In general, the balance weight is used to reduce the vibration of the rotating body, or to maintain balance of equipment in which a large force acts in one direction or balance is directly connected to safety.

Especially, many passengers are on the elevator, and even if the boarding position rushes to one side, it is necessary to maintain balance to enable smooth operation. This applies equally to cargo elevators.

Balance weight plays a very important role because the elevator can not be safe if the balance is not balanced.

These balance weights are usually formed by using a material having a high specific gravity and are usually squeezed to reduce the volume. A conventional balance weight is made of brass having a relatively low price and a large specific gravity as disclosed in Japanese Patent Application No. 10-0710641 (registered on Apr. 17, 2007, Balance Weight and such a balance weight production method).

However, since the elevator balance weight is heavier and bulky than a balance weight used in electronic products, there is a problem in that manufacturing cost is increased even if relatively inexpensive brass is used.

In view of such a problem, Japanese Patent Application Laid-Open No. 10-1193488 (Registered October 16, 2012, a nodule production apparatus for producing elevator balance weight using metal waste) is provided with a device for manufacturing a balance weight nodule for an elevator using metal waste .

Such a device describes the press molding of a raw material produced by mixing a solidifying agent after crushing a metal slag or metal waste, but it is not easy to collect such a metal waste, and it is difficult to crush metal waste There is a problem that the manufacturing cost is increased.

In addition, if a product is defective, it is very difficult to re-melt the product and re-manufacture a new product.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide an elevator balance weight and a manufacturing system thereof that can reduce manufacturing costs.

Another object of the present invention is to provide a balance weight for an elevator and a manufacturing system thereof, which can easily produce a new product by re-melting even if there is an abnormality in the forming process of the balance weight.

To achieve the above object, the present invention provides a system for manufacturing a balance weight for an elevator, comprising: a hopper for feeding a thermoplastic synthetic resin; A synthetic resin feeding line installed at a lower end of the hopper for supplying the synthetic resin and supplying the synthetic resin; And a screw conveyor mounted inside the synthetic resin feeding line for supplying the synthetic resin in a forward direction; A hopper for supplying a specific gravity; A specific gravity feeding line installed at a lower end of the hopper for the specific gravity feeder to feed the gravity feeder; And a screw conveyor mounted inside the non-body feeding line to feed the non-body forward; An injection port for injecting the synthetic resin supplied from the synthetic resin supply part and the non-gravity fed part together with the non-grained material; A mixing line provided at a lower end of the injection port; A screw mounted on the compounding line to agitate and blend the synthetic resin and the specific gravity; And a heater mounted on an outer peripheral surface of the compounding line and heating the compounding line at a temperature of 100 to 300 DEG C; A cutter for supplying a predetermined amount of the blend of the synthetic resin and the non-gravure body passed through the extruder; A metering unit configured to measure the weight of the blend supplied from the cutting unit, the metering unit being composed of a blending vessel, a load cell for measuring the weight of the blending vessel and the blending vessel, A mold part for injecting the compound that has passed through the metering part and for forming the flat weight of the balance weight; And a press for pressing the compound introduced into the balance weight mold part to produce a product.

In the present invention, a preheating heater is further installed on the outer circumferential surface of any one of the synthetic resin feeding line and the non-mass feeding line, and the preheating heater heats the raw material or the non-grained material at 50 to 300 ° C.

In the present invention, the elevator balance weight production system further includes a water tank for cooling the balance weight, and the water tank is further provided with a conveyance conveyor for conveying the cooled balance weight.

In the present invention, the compounding ratio of the synthetic resin and the specific gravity is 10 to 20% by weight of the synthetic resin and 75 to 89% by weight of the specific gravity, and 1 to 5% by weight of the grease is added to the synthetic resin so that the synthetic resin is easily separated from the mold. Is further blended.

Further, in order to achieve the above object, the present invention provides a balance weight for an elevator manufactured by the elevator manufacturing system according to the present invention.

The balance weight for an elevator and its manufacturing system according to the present invention can be easily manufactured by injection molding once by using a mixture of iron powder and sand as a heavy material and making the combination thereof thermoplastic resin. So that the manufacturing cost can be lowered.

In addition, since the balance weight for an elevator of the present invention and the manufacturing system thereof are made of a thermoplastic resin, when the abnormality occurs in the molding process, they can be collected and re-molded easily after melting to improve productivity, There is an effect.

1 is a schematic view of a balance weight production system for an elevator according to the present invention;
2 is a flowchart of a method for manufacturing a balance weight for an elevator according to the present invention.
3 is an embodiment of a balance weight for an elevator according to the present invention.

A balance weight for an elevator and a manufacturing system thereof according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1, the elevator balance weight production system of the present invention comprises a synthetic resin supply portion 10 for supplying synthetic resin, a specific gravity supply portion 20 for supplying a specific gravity, a synthetic resin S An extruder 30 for stirring and compounding the combination of the specific gravity G, a cutter 40 for feeding a certain amount of the compound in front of the extruder, and a metering unit 40 for measuring the amount of the compound supplied by the cutter. (70) for pressing the mixture in the mold of the mold part (60), and a water tub (80) for cooling the product in the mold ).

The synthetic resin (S) used in the present invention is preferably a polymer, and it is preferable to use a thermoplastic resin among the polymers. In addition, the use of polypropylene, a thermoplastic resin, is advantageous in that it can be purchased at a low price. At this time, since the thermoplastic resin can be melted and reused even if a product is defective due to the characteristics of the thermoplastic resin, it is possible to prevent waste of raw materials due to defective products and to reduce the cost of processing defective products, It has the effect of preventing pollution.

Further, the specific gravity (G) may be various kinds of grains ranging from small specific gravity to large grained ones, and metal or sand may be used mainly. As the metal, metals such as iron, copper, stainless steel, bronze, brass, tin, manganese, gold, silver and zinc can be used. It is also possible to use a mixture of the metals and sand as appropriate. If too much sand is added, it may be difficult to control the specific gravity of the required product. Therefore, it is preferable to mix the metal and the sand at a weight ratio of 3 to 5: 1.

In addition to the synthetic resin (S) and the non-mass (G) of the present invention, oil can be further added so that the synthetic resin can be easily separated from the mold. The mixing ratio can be approximately 10 to 20% by weight of synthetic resin, 1 to 5% by weight of oil, and 75 to 89% by weight of non-weight. Grease may be used as the oil. The specific gravity formed by the combination of the synthetic resin and the specific gravity may have a value of about 1.5 to 5.

The synthetic resin feeding section 10 includes a hopper 11 for supplying a synthetic resin, a synthetic resin feeding line 12 provided at a lower end of the synthetic resin feeding hopper 11 to supply the synthetic resin S, And a screw conveyor 13 for supplying the synthetic resin S in a forward direction. In addition, a motor 14 for driving the screw conveyor 13 and a shaft 15 of the screw conveyor are provided to drive the screw conveyor 13. The synthetic resin preheating heater 16 may be further mounted on the outer circumferential surface of the synthetic resin feeding line 12. The preheater 16 is used to preheat the synthetic resin so that the synthetic resin can be easily melted in the extruder. The synthetic resin preheating heater 16 heats the synthetic resin to a temperature of 50 to 300 ° C. The hopper 11 may be modified into various types of storage tanks.

The non-gravity feeder 20 includes a gravity feed hopper 21, a gravity feeder line 22 provided at the lower end of the gravity feed hopper 21 to feed the gravity feeder G, And a screw conveyor (23) mounted inside the non-mass feeding line (22) for feeding the non-mass body (G) forward. The figure also includes the motor 24 for driving the screw conveyor 23 and the shaft 25 of the screw conveyor. The non-mass preheating heater 26 may be further mounted on the outer circumferential surface of the non-mass feeding line 22. The non-mass preheating heater 26 is used to preheat a specific gravity mixed with the synthetic resin so that the synthetic resin can be easily melted in the extruder. The specific gravity preheating heater 26 heats the specific gravity at a temperature of 50 to 300 ° C. The hopper 21 may also be modified into various types of storage tanks.

The extruder 30 into which the synthetic resin and the non-mass are put together comprises an injection port 31 for injecting the synthetic resin and the non-mass together, a compounding line 32 installed at the lower end of the injection port 31, A screw 36 mounted on an outer circumferential surface of the compounding line 32 and an outlet 36 formed in front of the compounding line 32. The screw 33 is provided with a screw 33 for melting, stirring and mixing the synthetic resin and the non- (37). The screw 33 is further provided with a shaft 25 of the screw and a motor 34 for rotating the shaft. The heater 36 is driven at a temperature of 100 to 300 DEG C so that the synthetic resin in the extruder 30 can be melted. The time is approximately 5 minutes to 20 minutes, depending on the amount injected, while heating with a heater, stirring and compounding the formulation.

The mixture is discharged through the discharge port (37). A cut portion (40) for regulating the discharge amount is provided in front of the discharge port (37). The cutter 40 may comprise a cutter 41 and a hydraulic jack 42 for driving the cutter 41. [ The cutter 40 cuts the discharged compound uniformly. When a certain amount of the cutter 41 is put into the cutter 41, the cutter 41 stops operating.

By cutting the cutter 41, the blend is put into the raw material feed container 52 provided in the lower portion of the cutter. A load cell 51 is provided below the raw material charging container 52. The raw material charging container 52 and the load cell 51 constitute a metering section 50. The metering unit 50 allows a certain amount of the blend to be supplied. When the supply is completed, the metering unit 50 is transferred to the mold unit 60 by the transfer means of the raw material loading container 52.

When the material is fed to the upper portion of the balance weight mold portion 60 by the conveying means, the material introduction container 52 opens the lower end thereof, and puts the compound into the balance weight mold portion 60. Particularly, the compound is injected into the cavity of the mold 61 provided in the balance weight mold section 60. The balance weight mold portion 60 is formed in a rectangular shape so as to be formed into a rectangular flat plate shape as in the shape of the balance weight shown in Fig. 3, and is provided around the mold portion for cooling the formed balance weight for an elevator And a chiller 62. The chiller 62 is configured to cool the product in the mold by supplying cooling water to the outside of the mold space while being pressurized by a press.

When the compound is injected into the mold 61, the mold portion 60 is conveyed to the lower portion of the press 70 by the conveying means. The pressurized material is introduced into the mold of the transferred mold section 60 by the press 70 and the cooling water is supplied through the chiller 62 for cooling while being pressurized for a predetermined time at a pressure of about 200 to 300 tons, The cooling water acts for a certain period of time so that the formulation remains in the form of the product.

The balance weight mold part 60 is conveyed to the upper part of the water tub 80 by the moving means and is opened at the upper part of the water tub 80 to discharge the product into the water tub 80. [

After being cooled in the water tank 80 for a predetermined time, the water is transferred through the conveying conveyer 81 provided in the water tank 80, and the burr around the product is removed, and the product is inspected and prepared for shipment.

3 is a view showing an embodiment of the balance weight according to the present invention. As shown in the figure, the balance weight is composed of a rectangular flat plate-like body 1 and a fixing hole 2 for laminating and fixing a plurality of balance weights around the body 1.

The balance weights shown in Fig. 3 are manufactured in the order as shown in Fig. Hereinafter, a method of manufacturing a balance weight for an elevator according to an embodiment of the present invention will be described in detail. As shown in FIG. 3, the balance weight according to one embodiment of the present invention includes a mixing step of mixing raw materials containing at least one kind of metal powders and at least one kind of grains among the sand, thermoplastic resin and dispersing agent (S1), a mixing step (S1), a melting step (S2) for uniformly mixing the raw materials mixed at a temperature of 100 to 300 ° C for 5 to 20 minutes and mixing them evenly, and a step An injection molding step (S3) of extruding an injection mold to form a balance weight having a desired shape, and a cooling step (S4) of cooling the molded product after the injection molding step (S3) to produce an article.

Here, the mixing step (S1) is a step of mixing the metal powders and the raw materials containing the at least one heavy powder, the thermoplastic resin and the dispersing agent in the sand so as to be mixed evenly. Particularly, as the raw materials, the specific gravity of the finished articles is in the range of 1.5 to 5 , 75 to 89 wt% of the weight of the powder, 10 to 20 wt% of the thermoplastic resin and 1 to 5 wt% of the dispersing agent are mixed and stirred.

The weight grains determine the appropriate specific gravity of the balance weight by the production method according to one embodiment of the present invention, and any one or a combination of two or more selected from metal powders and sand having a somewhat higher specific gravity can be applied.

The specific weight of the balance weight can be suitably adjusted by using only the metal powder, but it is preferable to add the sand appropriately in order to reduce the product cost. In this case, if the metal powder is added too much to the weight powder, it is easy to control the specific gravity of the balance weight, but there is a disadvantage that the cost of the product is too high, and when the sand is added too much, Therefore, it is preferable to mix the metal powder and the sand in a weight ratio of 3: 1 to 5: 1.

In addition, although it is preferable to use iron powder which is easy to purchase and relatively inexpensive in terms of metal powder, it is not limited thereto.

In addition, the metal powder and the sand preferably have a particle size of 0.1 mm to 1 mm so as to be uniformly dispersed in the thermoplastic resin in the manufacturing process.

The thermoplastic resin is melted in the manufacturing process and mixed with the heavy powder uniformly, and then hardened while cooling down to form the body of the balance weight. The thermoplastic resin is a non-irritant, polypropylene having excellent hardness and tensile strength, PP: polypropylene) is preferably used but not limited thereto.

The thermoplastic resin can dissolve and reuse the thermoplastic resin constituting the body of the article even if the article is defective due to its own characteristics. Therefore, it is possible to prevent waste of the raw material due to the defective article and to dispose of the defective article To prevent environmental pollution that may occur in the environment.

The dispersing agent is used to disperse the gravimetric powder and the thermoplastic resin evenly without being concentrated in one place, and to mix them evenly. It is preferable to use ordinary grease oil, but the present invention is not limited thereto.

In addition, acrylic resin may be further included in the raw material to improve the surface characteristics of the balance weight by the manufacturing method according to one embodiment of the present invention. The acrylic resin is preferably added in an amount of 0.1 to 3% by weight to the raw material of 75 to 89% by weight of the powder, 10 to 20% by weight of the thermoplastic resin and 1 to 5% by weight of the dispersant.

It is also preferable to perform a preheating step S0 to preheat the weighted powder body before the mixing step S1 described above. This preheating step S0 is a step of preheating the weighted powder body prior to mixing, So that they can be uniformly mixed well and melted more uniformly. In the preheating step (S0), the weight of the powder is preferably preheated to a temperature of 100 to 300 < 0 > C. By preheating the heavy powder body, it is possible to easily increase the melting temperature to a desired melting temperature after mixing with the thermoplastic resin, so that the melting time and energy consumption can be reduced, and stirring and mixing can be easily performed.

After the above-described mixing step S1, a melting step S2 is carried out. In this melting step S2, the raw materials mixed evenly through the mixing step S1 are melted at a temperature of 100 to 300 DEG C for 5 to 20 minutes So that they are evenly mixed. In the melting step (S2), the thermoplastic resin is melted and mixed with the metal powders as a heavy powder and sand uniformly. When polypropylene is used as the thermoplastic resin, the melted material is melted at a temperature of 200 to 250 ° C for 10 to 15 minutes, It is preferable to mix them evenly.

After the above-described melting step S2, an injection molding step S3 is performed. In this injection molding step S3, the molten raw material is extruded into an injection mold in the melting step S2 to form a desired balance weight . In the injection molding step S3, the molten raw material is injected into an injection mold having a desired balance weight shape through an extruder, and then the mixture is pressurized through a pressurizing device such as a press at a pressure of 200 to 300 tons (t) So as to be formed into a shape of a balance weight. In the injection molding step S3, the mold is cooled by chiller while being pressurized for a predetermined time, so that the predetermined shape such as the balance weight can be maintained within a short period of time. Therefore, after the injection molding, the process proceeds to the next step while maintaining the desired shape of the balance weight.

After the injection molding step S3 described above, a cooling step S4 is carried out. In the cooling step S4, the molded article removed from the injection mold is cooled through the molding step S3 and finally manufactured into a finished balance weight . In the cooling step S4, it is preferable to cool the molded article removed from the injection mold through the molding step S3 for about 20 to 30 minutes at room temperature in order to prevent cracking due to rapid shrinkage. However, according to the embodiment, So that the product can be cooled in a shorter time through a water-cooled (using a water tank) or an air-cooled cooling system.

In the case of the balance weight and the method of manufacturing the same according to the embodiment of the present invention, not only the cement or concrete is molded and cured, but the weight powder, the thermoplastic resin and the dispersant Since the raw material is manufactured by injection molding, the time and manpower required for the manufacturing process can be reduced and the productivity can be maximized. Also, it can be eco-friendly because it can be reused without using cement.

In addition, in the case of the balance weight and the manufacturing method thereof according to the embodiment of the present invention described above, the weight and the weight of at least one of the metal powder and the sand, the thermoplastic resin and the dispersing agent Since the manufactured raw material is manufactured by injection molding, the defective product can be reused for injection molding even if a defective product occurs in the manufacturing process. Therefore, the raw material is prevented from being wasted due to the defective product, And environmental pollution can be prevented in advance. In addition, it does not use expensive metals such as brass or bronze, which can significantly reduce costs.

As described above, since the finished product formed by one body is molded through the injection molding, the time required for manufacturing the finished product is shortened, so that the productivity of the product can be increased. In addition, problems such as generation of defective products due to operation time and artificial mistakes It is possible to improve the price competitiveness of the product by reducing the unit cost of the product.

In addition, the raw material containing the thermoplastic resin is melted and the raw material is injected to produce a finished product, so that even if a defective product occurs during the production process, the defective product can be melted and reused to prevent the raw material from being wasted due to defective products. There is an effect that it is possible to prevent the cost of disposing of defective products and the environmental pollution generated in the process of discarding defective products.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention will be.

1: Main body 2: Fixing hole
10: Synthetic resin supply part 11: Hopper for supplying synthetic resin
12: Synthetic resin feeding line 13: Screw conveyor
14: motor 15: shaft
16: Synthetic resin preheating heater
20: specific gravity feeder 21: special gravity feed hopper
22: Specific gravity feeding line 23: Screw conveyor
24: motor 25: shaft
26: Specific weight preheating heater
30: extruder 31: inlet
32: mixing line 33: screw conveyor
34: motor 35: shaft
36: heater 37: outlet
40: Cutting section 41: Cutter
42: Hydraulic Jack
50: Metering part 51: Load cell
52: Material feed container
60: mold part 61: mold
61: Chiller
70: Press
80: water tank 81: conveying conveyor

Claims

In a manufacturing system for a balance weight for an elevator,
A hopper for feeding a thermoplastic synthetic resin; A synthetic resin feeding line installed at a lower end of the hopper for supplying the synthetic resin and supplying the synthetic resin; And a screw conveyor mounted inside the synthetic resin feeding line for supplying the synthetic resin in a forward direction;
A hopper for supplying a specific gravity; A specific gravity feeding line installed at a lower end of the hopper for the specific gravity feeder to feed the gravity feeder; And a screw conveyor mounted inside the non-body feeding line to feed the non-body forward;
An injection port for injecting the synthetic resin supplied from the synthetic resin supply part and the non-gravity fed part together with the non-grained material; A mixing line provided at a lower end of the injection port; A screw mounted on the compounding line to agitate and blend the synthetic resin and the specific gravity; And a heater mounted on an outer peripheral surface of the compounding line and heating the compounding line at a temperature of 100 to 300 DEG C;
A cutter for supplying a predetermined amount of the blend of the synthetic resin and the non-gravure body passed through the extruder;
A metering unit configured to measure the weight of the blend supplied from the cutting unit, the metering unit being composed of a blending vessel, a load cell for measuring the weight of the blending vessel and the blending vessel,
A mold part for injecting the compound that has passed through the metering part and for forming the flat weight of the balance weight; And
A press for making a product by pressing the compound injected into the balance weight mold part;
And the weight of the elevator.

The method according to claim 1,
Characterized in that a preheating heater is further mounted on the outer circumferential surface of any one of the synthetic resin feeding line and the non-mass feeding line, and the preheating heater heats the raw material or the non-mass body to 50 to 300 ° C. .

The method according to claim 1,
The system further comprises a water tank for cooling the balance weight,
Wherein the water tank is further provided with a conveying conveyor for conveying the cooled balance weight.

The method according to claim 1,
The blending ratio of the synthetic resin and the specific gravity is 10 to 20% by weight of a synthetic resin and 75 to 89% by weight of a specific gravity,
Wherein 1 to 5% by weight of a grease is further compounded in the synthetic resin so that the synthetic resin is easily separated from the mold.

A balance weight for an elevator produced by the system of claim 1.