TW460514B - Foamed plastic board with artistic appearance and manufacture method - Google Patents

Abstract

This invention provides a foamed plastic board with artistic appearance and manufacture method. The two-material co-injection molding method is employed, where wood-imitation material with the addition of wood powder and foamable plastic material are individually placed into the two hoppers of the injection-molding machine. The two materials are injected into the cavity of a mold using two-material co-injection molding method. During the co-injection molding process, the wood-imitation material forms the wood-imitation surface layer by flowing within the outer region of the mold cavity while the foamable plastic material forms foamed core by flowing at the inner region of the mold cavity. After cooling and demolding, a foamed plastic layer covered with wood-imitation appearance layer is obtained. The inventive method can avoid the trouble of the secondary process required to paste wood pattern sheet and thus simplify the processes. Moreover, this improves the quality of wood substituting plastic article and achieves the ecological and environmental effect.

Description

4 6051 4 V. Description of the invention α) The present invention relates to a foamed plastic plate with an appearance surface and a manufacturing method thereof. It mainly uses a dual-material co-injection molding method to simultaneously inject an appearance skin layer and foam into a cavity. The core layer of plastic material, when cooled and ejected from the mold, can be naturally formed on the outer surface of the core layer of foamed plastic with a skin layer. Natural resources are limited. It is impossible to make people demand excessively. For example, for a long time, people have relied too much on natural wood for deforestation. This has not only led to rapid extinction of forest plants on the ground, but its impact has also expanded to soil erosion and soil and water conservation. According to research, it has been pointed out that in recent years, the entire environmental and ecological anomalies and the deterioration of the greenhouse effect are related to the excessive abuse of forest plants. Therefore, in consideration of environmental protection, it is impossible to endlessly rely on natural forest materials for building materials or For other furniture, we must find alternative materials that can replace wood. However, because alternative materials must have the high rigidity, shock resistance, light weight, good processing or sound insulation of wood, the widely used alternative is plastic materials. Although the injection molding method of plastic materials has been widely used, and has the advantages of lower cost and easier processing process, but because of the high shrinkage of the plastic material itself, it is difficult to achieve for products requiring high strength The general design is to reinforce the strength by thickness, but this will not only increase the amount of material used and the size of the material, but also the performance of plastic materials in terms of shock resistance or sound insulation is inferior, especially when it is applied to speakers or speakers It is even more difficult, so a technology that uses foamable plastic material injection molding is immediately applied and developed, and the air bubbles existing in its interior to achieve the above-mentioned functions of sound insulation or shock resistance.

Pl-9284.ptd Page 4 460514 V. Description of the invention 惟 However, the number of bubbles and the appearance of the product to increase the appearance of the product, please refer to the imitation wood products 1 4 (one of which can be foamed plastic or sound insulation effect) will be added again 10 Appearance of this effect > But the doubts about increasing the cost have been solved. Therefore, the decision method can be automatically upgraded to the plastic layer and the inventor's molding-related good intentions are exhausted. Finally, a method has been developed to solve the pores during injection molding. A stick of wood fruit is affixed on the surface, so the first picture is mainly composed of the bubbles made of the foamed plastic material. 1 6 Working through a sticky layer, so the production method requires additional expenditure, and how to stick Aiming at the research on the feasibility of not needing to stick to the foamed wood, the individual's specialization has a problem with the above-mentioned problems. In the foaming plastics, it has a texture layer or it can reach the commodity. In order to use a fake 10 foamed plastic layer, its internal storage, Wood plastic sheet 1 reaches the adhesive layer, although a beautiful appearance can be achieved on the adhesive paste through the effect of the lack of said conventional adhesive outer layer of plastic processing system, a long time, and the development of the present invention, and the pin industry knowledge, the appearance of the surface.爰 is the appearance of plastic products generally need to be refined by the appearance of other requirements. The sectioning layer 10 of wood products and foam injection are applied to a plurality of layers 1 4 (or 2 and adhere to each other. The processing process of foamed plastics is used for a long time, and the case of one pass is proposed below. Simplification has always been based on many years of research. Based on many years of practical experience in sales, the foamed plastic board surface will have no secondary processing. In the process of layer-by-layer, a schematic diagram of the surface molding technology will be used as a foamed plastic layer product with a shock-resistant appearance. The beautification is not only inconvenient, but also has a novel solution. The appearance process and the effective person are eagerly looking forward to engaging in injection. They are thinking about redesigning, special exploration and their producers. 4 6 0 5 1 4 V. Description of the invention (3 The main object of the present invention is to provide a foamed plastic plate with an appearance surface and a manufacturing method thereof. By using a technique of double-material co-injection molding, a foamed plastic layer can be naturally formed on the outer surface of the foamed plastic layer simultaneously at the time of injection molding. An exterior skin layer or imitation wood surface layer to achieve effective promotion

I use and protect the ecological environment. A secondary object of the present invention is to provide a foamed plastic plate with an appearance surface and a manufacturing method thereof, and a manufacturing method using two-material co-injection molding.

It can be naturally shaped on the surface of the foamed plastic layer without the need for a secondary processing and pasting process. I] · It becomes a wood grain skin layer or a surface appearance layer, so it can simplify the process and save costs. i Another object of the present invention is to provide a foamed plastic plate with an appearance surface and a method for manufacturing the same. The appearance skin layer is naturally formed on the outer surface of the foamed plastic layer through high temperature and pressure. Therefore, its adhesion effect is similar. Compared with the conventional method using 1 I adhesive, the adhesive effect is better, and it can be used often. In order to make your reviewing committee understand the structural features of the present invention and achieve a better understanding of the effect, only the preferred embodiment diagram and detailed description will be described later: 丨 First, please refer to Section 2 The figure is a schematic cross-sectional view of the I structure of a preferred embodiment of the present invention. As shown in the figure, the foamed plastic board with an appearance surface of the present invention mainly includes a foamed plastic layer 20 and a copy on the upper and lower surfaces. Wood surface layer 24 (or appearance skin layer), in the foamed plastic layer 20, there are a plurality of bubbles 2 6 with shockproof or sound insulation effects, and between the foamed plastic material layer 2 and the imitation wood surface layer 2 4 But there is no sticky glue like a custom! 1 丨 attached layer.

P] -9284, ptd Page 6 4 605 彳 4 V. Description of the invention (4) Moreover, please refer to Figures 3A to 3C, which are the steps in the production of a preferred embodiment of the present invention Schematic diagram of the cut surface; as shown in the figure, the present invention mainly uses two materials of a double-material co-injection molding machine 30 to co-inject the molding characteristics at the same time. A doped wood is placed in the external barrel 50 first. A powder (not shown) wood-like material 5 2 is injected into a cavity 62 of a mold 60 through an outer feeding pipe 54 and a pouring port 32 for injection molding, as shown in FIG. 3A. While the imitation wood material 5 2 is still injecting raw materials, one of the foamable plastic materials 4 2 that has been stored in the other built-in barrel 40 of the double-material co-injection molding machine 30 is also foamed using the injection molding technology. The plastic material 4 2 is extruded through an inner feeding tube 4 4 and the pouring port 3 2, and is injected into the mold 6 62 of the mold 60 to be formed. Affected by the order of arrival and other physical factors, the imitation wood material 5 2 will move to the outer surface of the cavity 6 2 in the cavity 6 2 (dark color), and the foamed plastic material 4 2 It will flow in the inner core layer in the cavity 62 (the dot-like light-colored display), as shown in Figure 3B. In this way, when the entire cavity 6 2 is filled with the foamed plastic material 4 2 and the wood-like material 52 (as shown in FIG. 3C), and after cooling and cooling, the wood-like material 5 2 will be natural at this time. Wrapped in foamed plastic material 4!

The outer surface of I 2 does not require additional processing and paste manufacturing procedures, so it can not only simplify the manufacturing process, but also save costs. In addition, since the wood-like material 5 2 of the present invention is co-injected and molded with the foamed plastic material 4 2 through high-temperature pressure treatment, its adhesion effect is better than the conventional adhesion result using adhesive. Years and products

Pi-9284, ptd page 7 460514 V. Description of invention (5) Of course, the quality is relatively better. In addition, the present invention uses a two-material co-injection molding machine to cause the imitation wood 5 2 to naturally cover the outer surface of the foamed plastic material 4 2, and also refers to the gas-assisted injection molding technology, in its pouring port 32 or the feeding tube 4, 5 4 is provided with a gas injection port 70 to introduce, for example, nitrogen or an inert body into the cavity 6 2 of the mold 60 to increase the uniform distribution of the material flow rate, the amount of material used in the cavity, and assist in melting. The rapid forming function of plastics is shown in Figure 3C. In the above manufacturing process, the foamed plastic material 4 2 and the imitation wood material 5 2 are respectively injected into the cavity 6 2 in a spaced manner, but in the actual operation process, the foamed plastic material 4 2 and the imitation wood material 5 2 can also be injected into the cavity 6 2 in the same manner. Finally, please refer to FIG. 4, which is a three-dimensional cross-sectional view of the appearance of an embodiment after the production of the present invention is shown; as shown in the embodiment, a sigma-eight speaker is used as an example, with a plurality of air bubbles 26. The foam layer 2 0 is injection-molded by the foamed plastic material 4 2 described above, and the imitation wood surface layer 2 4 that naturally covers the surface is formed by the above-mentioned imitation wood material 5 2 co-injection type, which does not exist between the two. There is an adhesive adhesive layer, so it can be quickly made into a large number of speakers or speaker materials. It not only has the high rigidity, shock resistance, or sound insulation effect of natural wood, but also has a wood grain appearance on the surface. The imitation wood surface layer is 2 4, so it can be used for the full use of wood materials, with both environmental protection and ecological effects. Of course, the present invention is not limited to use in imitation wood materials, and the outer material such as polypropylene (PP), polyethylene (PE), or acrylonitrile can be used as the material. Outside! While the special i tube

Pl-9284.ptd Page 8 305 1 4 V. Description of the invention ¢ 6) Resin materials such as olefin-styrene copolymer (ABS), and doped wood powder can also choose a color powder (unknown (Showing), also after the co-injection molding, other colors or special effects will be formed on its outer surface layer. Of course, this special color effect is not limited to a single primary color, but can also be a combination of multiple colors. Moreover, its application is not limited to speakers, such as building materials, household products, or pallets. To sum up, the present invention relates to a foamed plastic plate with an appearance surface and a manufacturing method thereof. The foamed plastic plate mainly uses a dual-material co-injection molding method to simultaneously shoot an appearance skin layer and a core layer of foamed plastic material in a cavity. When the mold is cooled and ejected, an external appearance skin layer can be naturally formed on the outer surface of the core layer of the foamed plastic, which not only saves the trouble of secondary processing required to adhere to the external appearance of the wood grain, in order to simplify the process, but also effective Promote the use of wood instead of wood to meet the requirements of ecological and environmental protection. Therefore, the present invention is truly novel, progressive, and available for industrial use. It should meet the patent application requirements. It is no doubt that the invention patent application is filed in accordance with the law. However, the above is only a preferred example of the present invention and is not intended to limit the scope of implementation of the present invention. Therefore, all equivalent changes and modifications of the shape, structure, characteristics, and spirit described in the scope of patent application of the present invention: shall be included in the scope of patent application of the present invention. (I) Brief description of the drawings: Figure 1: a schematic sectional view of the structure of a conventional imitation wood product; Figure 2: a schematic sectional view of the structure of a preferred embodiment of the present invention ;: Figures 3A to 3C : This is a cross-section of each process when the invention is made ''

II 丨 L _ —— 丨

Pi-9284.ptd Page 9 460514 V. Description of the invention ¢ 7) The figure is shown: and Figure 4 is a three-dimensional cross-sectional view of the finished product after the invention is completed. 1 2 Adhesive adhesive layer 1 4 Wood-like surface coating 1 6 Bubbles 2 0 Foamed plastic layer 2 4 Wood-like surface coating 2 6 Bubbles 3 0 Double-material co-injection molding machine 3 2 Gate 4 0 Built-in barrel 4 2 Foamable Plastic material 4 4 Inner feeding tube 5 0 Outer barrel 4 2 Wood-like material 4 4 Outer feeding tube 7 0 Gas injection σ

Pl-9284, ptd page 10

Claims (1)

460514 Official Documents 1. Scope of Patent Application1. A foamed plastic board with an appearance surface, the main structure of which includes a foamed plastic layer with a plurality of air bubbles inside and formed from a foamable plastic material; and an appearance The skin layer is formed by a resin co-injected with the foamed plastic layer through the use of a double-material co-injection molding machine, and naturally forms a coating on the outer surface of the foamed plastic layer. 2 The foamed plastic sheet according to item 1 of the scope of the patent application, wherein the resin used in the outer skin layer can still be doped with a wood powder to form a wood-like imitation wood surface layer. 3. The foamed plastic board according to item 1 of the scope of patent application, wherein the resin used in the outer skin layer can be doped with a color powder to become an outer skin layer with a special color effect. 4 · The foamed plastic sheet according to item 1 of the scope of patent application, wherein the resin material used in the outer skin layer is one of PP, PE, and ABS. 5. The foamed plastic board according to item 2 of the scope of patent application, wherein the imitation wood surface layer is applicable to a speaker material. 6. A method for manufacturing a foamed plastic plate, the main steps of which include: a. Placing a resin in an outer cylinder of a twin-material co-injection molding machine, adding wood powder therein, and passing the The feeding tube and a washing injection port are injected into the cavity of a mold, so that it becomes an appearance skin layer with a wood-like effect; b. Placing a foamable plastic material in the dual-material co-injection molding machine PU9284, ptd Page 11 460514 6. The scope of the patent application is built into the object barrel and injected into the cavity of the mold through an inner feeding tube and the pouring port, so that it becomes a foamed plastic layer with a plurality of air bubbles inside. ; And C. When the foamable plastic material and resin are injected into the entire cavity for injection molding and cooled and then released, the appearance skin layer with a wood-like effect will naturally form on the outer surface of the foamed plastic layer. 7 · The manufacturing method as described in item 6 of the application scope, wherein the foamable plastic material and the resin are injected into the cavity in a co-injection manner at the same time. 8 · The manufacturing method as described in item 6 of the scope of patent application, wherein the foamable plastic material and the resin are separately injected into the cavity by a spaced injection method. 9 _ The production method as described in item 6 of the scope of patent application, wherein the wood powder also added in the built-in | barrel can be a color powder, which makes its appearance and skin layer have a special color effect. I 0 · The manufacturing method as described in item 6 of the scope of patent application, wherein the resin is one of PP, PE, and ABS. I II The manufacturing method described in item 6 of the scope of patent application may further include a step: d. A gas injection port is added to the dual-material co-injection molding machine to facilitate the introduction of a gas into the cavity. Pl-9284 — ptd page 12