KR200362501Y1 - Supporter for Projection-TV - Google Patents

Abstract

The present invention is a pedestal for supporting a predetermined front and rear frame from the bottom, the main panel and the front panel to form a space on which the predetermined control devices are to be mounted, coupled to the front of the main panel, and the main and front panel A base panel supporting a lower portion of the base panel; At least one or at least one of the main, front and base panels is characterized in that it is produced by injection molding by a predetermined micro-foaming molding method.

In this way, the gas of the supercritical state is injected into the cylinder of the injection molding machine, the molding material and the gas are mixed and injected into the mold, and then a fine size bubble (5-50 μm) is generated inside the polymer material. Molding can reduce the weight, make it applicable to thin-film products, and improve its mechanical properties.

Description

Projection TV stand {Supporter for Projection-TV}

The present invention relates to a projection TV stand, and more particularly, a supercritical gas is injected into a cylinder of an injection machine, a molding material and a gas are mixed and injected into the mold, and then into a polymer material. The present invention relates to a projection TV pedestal, which can produce micro bubbles (5 ~ 50㎛) to shape products to reduce weight, to be applied to thin film products, and to increase their mechanical properties.

Projection TV is a projector that is used in a theater, and it is made in a TV, and a reflection object such as a mirror can be put inside to reflect the image, which makes it relatively larger than a general television.

Of course, since the viewing angle is narrower than the general CRT, the eye height and distance to be viewed must be matched with the screen, and there is a disadvantage in that a predetermined time is required when ON / OFF. However, projection TVs are widely used in large meeting rooms and spaces to view screens with a wider viewing angle.

As described above, since the projection TV is relatively large in volume or size compared to a normal television, the base for supporting the projection TV is also large in volume. In the case of projection TV pedestals known to date, there is an example using wood or MDF wood plywood.

Or manufacture a projection TV stand made of plastic synthetic resin. This is known from the Republic of Korea Patent Application Utility Model No. 20-0251968, in the case of the known technology, by separating the projection TV into the screen frame, reflector case, projector case and pedestal to make it easy to transport and move. In addition, by using synthetic resin such as glass fiber reinforced plastic or carbon fiber as the material of each part, mass production is possible in a short time by a manufacturing apparatus such as a mold while reducing weight.

Of course, when manufacturing a projection TV stand, if the material is made of plastic, it depends on injection molding. However, when manufacturing the pedestal only by plastic injection molding, it is impossible to apply to thin film products and its mechanical properties are not good. In addition, due to its own weight, it is not only disadvantageous to lighten the product, but also has poor dimensional accuracy and durability, and the cycle to produce the product is relatively long, which makes it difficult to actually introduce a mass production system.

Therefore, the applicant of the present invention, when injection molding the projection TV stand as described below, by injecting a gas of a super critical state into the cylinder of the injection machine to mix the molding material and the gas and injected into the mold, the inside of the polymer material By forming a micro bubble (5 ~ 50㎛) in the shape of the product to reduce the weight, to be applied to thin film products and to improve the mechanical properties.

In addition, the overall weight of the product has been reduced to lighter weight, but rather increased durability and improved dimensional accuracy, while reducing the cycle to produce the product to lead to mass production.

The object of the present invention is to inject a gas of a supercritical state into the cylinder of the injection molding machine, mix the molding material and the gas and inject the inside of the mold, and then form a fine bubble (5-50 μm) inside the polymer material. It is to provide a projection TV stand that can be produced and molded to reduce weight while being applied to thin film products and to increase its mechanical properties.

Another object of the present invention is to provide a projection TV pedestal that can reduce the overall weight of the product to reduce the weight, but rather increase the durability and improve the dimensional accuracy, while reducing the cycle to produce a product to lead to mass production.

1 is a perspective view of a projection TV applied to the projection TV according to the present invention,

2A and 2B are schematic front and side projection views of FIG. 1, respectively;

3 is a configuration diagram showing a method for manufacturing a projection TV stand shown in FIG.

* Explanation of symbols for the main parts of the drawings

10: front frame 20: rear frame

22 mirror 30 pedestal

31: main panel 32: front panel

33: base panel

The object is a pedestal for supporting a predetermined front and rear frame from the bottom, the main panel and the front panel to form a space in which the predetermined control devices are to be mounted and coupled to the front of the main panel, the main and front panel A base panel supporting a lower portion of the base panel; At least one or more than one of the main, front and base panels is achieved by a projection TV pedestal, characterized in that produced by injection molding by a predetermined micro-foaming molding method.

Here, the micro-foaming molding method, and a gas supply / blocking unit for selectively supplying and blocking the gas of the filter; A screw / barrel for supplying resin as a main raw material of the pedestal and simultaneously kneading the gas provided from the gas supply / blocking unit; A shut-off nozzle for filling the mold into the mold of the pedestal equipped with the injection molding machine and for selectively holding the screw / barrel to prevent backflow of the resin; Injection is carried out with a control device for controlling the gas supply / blocking unit and the shut off nozzle.

At this time, the gas is advantageously nitrogen.

Hereinafter, with reference to the accompanying drawings will be described in detail for the subject innovation.

1 is a perspective view of a projection TV to which the projection TV stand according to the present invention is applied, and FIGS. 2A and 2B are schematic front and side projection views of FIG. 1, respectively.

As shown in these figures, the projection TV according to the present invention is largely coupled to the front frame 10 supporting the screen 11, the back of the front frame 10, the projection light is screen ( 11 consists of a rear frame 20 which forms an inclined surface 21 so that the mirror 22 reflecting so as to be directed at an angle, and a pedestal 30 which supports the front and rear frames 10 and 20 from the bottom thereof. have. In the pedestal 30, a plurality of projectors 25 projecting a predetermined signal toward the mirror 22 in a so-called CRT format are arranged obliquely toward the mirror 22.

Accordingly, when a signal is input and a predetermined image signal is projected from the plurality of projectors 25, the image signal projected through the projector 25 is directed to the mirror 22 and then reflected by the mirror 22 to display the screen 11. The image is formed on the screen 11 by being directed toward.

Meanwhile, the pedestal 30 supporting the front and rear frames 10 and 20 from the bottom forms a main panel 31 having a trapezoidal cross section according to its position and a space in which predetermined control devices are to be mounted. It consists of a front panel 32 coupled to the front of the (31), and the base panel 33 for supporting the lower portion of the main and front panel 32, these panels are each injection molded according to its shape and structure, It is injection molding by applying foam molding technology, so-called MuCell technology as follows. For reference, MuCell is a trade name of the US Treccell (Trexel) company will be named as a micro-foaming molding method.

The projection TV pedestal 30 is manufactured by injection molding with ordinary plastic, but a predetermined micro-foaming molding method is applied. In other words, the gas of the supercritical state is injected into the cylinder of the injection molding machine, the molding material and the gas are mixed and injected into the mold, and then a bubble (5-50 μm) having a fine size is generated inside the polymer material. 30) is being molded.

Although it depends on the injection molding as described above, by applying a predetermined micro-foaming molding method, the overall weight of the pedestal 30 is reduced while its mechanical properties are rather high. In addition, while the overall weight of the pedestal 30 is reduced, the durability is increased and the dimensional accuracy is improved. As a result, the cycle for producing the product is relatively shortened, thereby achieving a mass production system.

3 is a configuration diagram showing a method for manufacturing the projection TV pedestal shown in FIG.

Referring to this figure, in order to manufacture the projection TV pedestal 30, first, in addition to the injection molding machine 45, the gas supply / blocking unit 41, the screw / barrel 42 and the shut-off nozzle (43, Shut-Off-Nozzle) and the control device 44 for controlling the gas supply / blocking unit 41 and the shut-off nozzle 43, and for generating and storing necessary gas.

The gas supply / blocking unit 41 is selectively opened and closed by the controller 44 to supply and block gas to the resin. The gas used at this time is an environmentally friendly nitrogen gas, and does not cause an environmental problem by using a freon or a powder foaming agent as in the prior art.

The screw / barrel 42 serves to knead the resin which is the main raw material of the pedestal 30 and the nitrogen gas from the gas supply / blocking unit 41. The screw used in this case is different from the screw used in the general injection molding machine 45, and has an improved structure for optimizing the overall length, diameter, diameter, interval, etc. in order to maximize the efficiency in mixing resin and gas. see.

The shut-off nozzle 43 serves to maintain the screw / barrel 42 as a closed space to prevent backflow in addition to the filling of the resin into the mold of the pedestal 30 provided in the injection molding machine 45. It is controlled by the controller 44 to prevent the gas and resin from leaking in the kneaded state and to be opened and shut off at an optimum state.

Then through the above configuration will be introduced a method of manufacturing the projection TV pedestal 30.

First, the resin as the main material for forming the pedestal 30 is selected as a quantitative value from 50% to 80%, and then supplied into the screw / barrel 42. At the same time, the gas inlet of the gas supply / blocking unit 41 is opened by the controller 44 and nitrogen gas from the gas supply / blocking unit 41 is introduced into the screw / barrel 42 through the gas inlet.

The resin and gas are then kneaded in a screw rotation in the screw / barrel 42. At this time, the shut-off nozzle 43 is closed in order to keep the inside of the screw / barrel 42 as a sealed space.

When the kneading of the resin and the gas in the screw / barrel 42 is completed, the shut-off nozzle 43 controlled by the controller 44 is opened, and the kneaded resin is filled into the mold of the injection molding machine 45. . The resin filled at this time is a fine foamed state (5-50 µm) in which a supercritical gas (nitrogen) is kneaded with the resin, rather than the original stock solution.

The resin kneaded in the filling process rapidly decreases the pressure at high pressure in a closed space, and as the gas particles nucleate, cells grow and microbubbles are formed. In other words, the kneaded resin measured at 50% to 80% of the product balance is expanded in volume by the growth of the cell, resulting in 100% product molding and fine foam molding.

When the kneaded resin in the screw / barrel 42 is completely filled into the mold of the injection molding machine 45, the shut-off nozzle 43 is closed through the control device 44 to prevent backflow of the resin due to gas expansion. This leads to resin metering for molding.

When the gas (nitrogen) in the supercritical state is kneaded into the mold of the injection molding machine 45 and the resin is filled in a fine foamed state (5 to 50 μm), the shape of the pedestal 30 is changed according to the manufacturing method of general injection molding. Is done. Of course, in the process of forming the pedestal 30, the main panel 31, the front panel 32 and the base panel 33 are separately injection molded, and then assembled together in a post-work.

As described above, according to the projection 30 pedestal 30 for injection molding by applying a predetermined micro-foaming molding method, the manufacturing cost is particularly advantageous. The overall weight is reduced because less than 15-30% of the resin requirement is used, eliminating the need for a filling packing process, which reduces cycle time by 20-50% and reduces cooling time by 25%, resulting in overall mass production.

In addition, residual stress due to low pressure injection can be eliminated to prevent bending and warping defects, and the quality can be improved due to the improvement of dimensional accuracy and variety of product design. Due to the bubbles in the tissue, the physical properties of the material are reinforced because the impact strength is about 2 times elongated, dustproof, and thermal insulation is enhanced.

In addition, since the use of nitrogen recycles raw materials, not only the environmental cost is reduced, but also the supercritical low pressure injection machine has the advantage of greatly reducing the molding equipment capacity and power consumption.

Although the present invention has been described in detail with reference to the drawings, the present invention is not limited thereto.

As described above, according to the present invention, a gas of supercritical state is injected into the cylinder of the injection molding machine, a molding material and a gas are mixed and injected into the mold, and then a bubble having a fine size (5 to 5) is formed inside the polymer material. 50㎛) to reduce the weight by forming a product to be applied to thin-film products and the mechanical properties can be improved.

In addition, while reducing the overall weight of the product, the weight is lighter, but also increases durability and improves the dimensional accuracy, while reducing the cycle to produce the product has the effect that can lead to mass production.

Claims (3)

A pedestal for supporting a predetermined front and rear frame from the bottom, A main panel, a front panel coupled to a front surface of the main panel, and a base panel supporting a lower portion of the main and front panels to form a space in which predetermined control devices are to be mounted; At least one or more than one of the main, front and base panel is a projection TV pedestal, characterized in that produced by injection molding by a predetermined micro-foaming molding method. The method of claim 1, The micro-foaming molding method, A gas supply / blocking unit for selectively supplying and blocking gas of the source; A screw / barrel for supplying resin as a main raw material of the pedestal and simultaneously kneading the gas provided from the gas supply / blocking unit; A shut-off nozzle which fills the resin into the mold of the pedestal equipped with the injection molding machine and selectively seals the screw / barrel to prevent backflow of the resin; And a gas injection / closing unit and a control device for controlling the shut-off nozzle. The method of claim 2, Projection TV pedestal, characterized in that the gas is nitrogen.