TW570950B - Method for producing thermosetting artificial wood for making prototype mold or cast mold and artificial wood made therefrom - Google Patents

Abstract

The invented method comprises mixing a liquid thermoset resin selected from a group consisting of an epoxy resin, an unsaturated polyester resin (UP), and a polyurethane (PU), with a light filler at a specific ratio, and a hardening agent; and pouring the mixture into a mold for cross-linking into a network-like structural rigid material having properties similar to wood and capable of being processed similar to wood (e.g. cutting, slicing, planning, nailing, drilling, etc.) to form a desired shape of a prototype mold or a cast mold. Such a thermosetting artificial wood can be used to produce a cast mold, a prototype mold for shoes, a mold for plastic injection, and a prototype mold for producing automobile parts.

Description

570950 V. Description of the invention (1) Field of the invention The present invention relates to a hardened plastic material with a net structure, and in particular, it relates to a wood that has the appropriate hardness and can be cut, chipped, planed, nailed, drilled, and processed by the same processing methods as wood. Hardened plastic material and preparation method thereof. BACKGROUND OF THE INVENTION Most of the raw materials used in prototype molds or sand foundry molds are made of wood. Because the wood is in the sand foundry mold process, its wood grain has a horizontal and vertical relationship and appears; ^ μ 私 au ~ 卜 “本 尤The physical properties of the total age are also different, such as the vertical wood grains are not easy to break, but the horizontal wood grains are not tough, and the CNC high-speed carving in the sand process is a high-speed engraving. Τ The texture of the right shoe change is relatively rough and encounters horizontal, vertical, horizontal, and vertical breaks due to rapid CNC cutting, which causes troubles for seniors and reduces the production rate. Right | + i \ Thoughts on the operation, plus I am engaged in ^ 有 =, and I have detailed the plastic characteristics on this point to make up for the problems of wood such as "Ding Qianxian, labor test, experiments, formula adjustment, second, and" ", and have gone through countless lives. Zheng Yazuo was supplemented by theory, and this invention produced the profit of the Japanese petrochemical stock price. In August 1992, the company claimed in Taiwan in 1991 that the owner claimed that the name of the patent was "lightweight compound interest" and the patent announcement number was 1. 8835 :, specialized materials and the compound ::;:;: epoxy rr products, intermediate materials 4 balls and foaming agents, etc. to make lightweight composite concrete; j use j gas resin, hollow sheet Or film-like product; the light weight or the strength of the wood used for making sand molds conforms to the prototype UCheniln U999〗 pat PATENT \ pidll082. Ptd page 4 570950

And the complexity of its manufacturing method and process is also not conducive to production costs. Summary of the invention The broadcast of the ΐ Ming ΐ is in the supply of 帛-帛 has the appropriate degree and network skin, ‘. It is used to make hardened plastic materials instead of wood for the production of prototype molds or sand molds. ”” (Short Ming another purpose is to provide a kind of hardened plastic material with 55-70 Shore D hardness (Sho ^ 〇) and 10 ~ 150 micron mesh network structure or hard sanding mold making A further object of the invention is to provide a method for preparing a hardened plastic wood instead of a prototype mold or sanding mold coat. In order to achieve the above-mentioned object of the invention, a prototype fork according to the present invention is completed. The method for preparing a thermosetting plastic material instead of wood for making sand or molds is as follows: 3) a) mixing a liquid thermosetting resin, a hardening agent for hardening the thermosetting resin, and 10-60% by weight of Plastic or glass hollow spheres with a particle size between 丨 〇 ~ i 5 〇 # m microns, based on the weight f of the liquid thermosetting resin plus hardener; b) pouring the mixture obtained in step a) into a mold Inside; and c) hardening the mixture in the mold to form a hardened plastic wood substitute having a network structure of 5 5 _ 7 〇Shore D hardness (Shore D) and 1 〇 ~ 1 50 // m mesh Detailed Description of the Invention The present invention is in liquid form without cross-linking. Bridging) hardening reaction of the thermosetting tree

570950 V. Description of the invention (3) For grease, such as epoxy resin, unsaturated polyester resin (UP, unsaturated polyester resin) or polyurethane (PU, polyurethane), add a stoichometric amount ) Hardener and a certain range of light or low specific gravity fillers, such as glass hollow bead and plastic micro sphere bead with low boiling point solvent (butane or pentylene etc.) Then, the resin, hardener and filler are stirred and mixed uniformly with a mechanical stirrer, and then they are transported or poured into a mold or a worktable with a shape. After the mixing time is increased, the mixed solution can be hardened. Forming a hardened plastic material; either heating the mixed liquid or hardening the mixed liquid to accelerate the hardening of the mixed liquid to form a hardened plastic material. After secondary processing (such as CNC lathe processing, etc.), it can become the shape of the prototype mold or sand foundry mold that I hope. It can be generally used in sand foundry molds, shoe material prototype molds, plastic injection material prototype molds, and part prototypes on the automotive industry. Molds, etc. This kind of hardened plastic material can be called wood substitute, because it has suitable hardness, strength, and can replace wood, and can be processed by cutting, chipping, planing, nailing, drilling, and wood-like processing methods. To achieve the shape of the desired prototype mold or sanding mold. In addition, the production method of the Yoyogi of the present invention uses a continuous infusion system, so the size of the finished product or semi-finished product is not limited by the traditional mold of the thermoplastic plastic product. The present invention has a breakthrough in terms of both dimensional variability and processing convenience of the finished product. "Hermal-set resin", suitable for thermosetting or thermosetting resins, its original state is liquid. After hard blending, it is chemically crosslinked for 4 days. When reaction or heating shortens the crosslinking reaction

WChenlin \ 19991l03 \ PATENT \ pidl1082.ptd Page 6 570950 V. Description of the invention (4) "Make it from the liquid state to form eight 2 t dL due to chemical cross-linking reaction ^ ^ ^ 7 network bridge in the molecule Structure, so that it becomes a hardened solid and no longer flows μ, and it is thermosetting or rhenium is also solid when returned to room temperature, and cannot be changed back to the original liquid state thermosetting resin. For the selection of thermosetting resins, the present invention is the first to introduce epoxy resins, unsaturated polyester resins and polyurethane resins. Since such resins have adjustable work-hardening molding time, it is easy to mix the added amount of two agents and The soft and hard characteristics after hardening can be adjusted, making the "wood substitute" after hardening very suitable for cutting, shaving, planing, nailing, drilling, and other processing operations that are the same as wood. It is very suitable as a substitute for various types of wood. In the choice of resin, epoxy resin (ep0xy resin) is taken as an example. The epoxy equivalent value ranges from 170 to 500 (g / eq), and the preferred range is between 1 8 to 250 (g / eq). The viscosity range From 500 cps (25 ° C) to 15000 cps (25 ° C), the specific gravity is between 1 · 10-1 · 20. The choice of hardener is mainly amines. The theoretical active hydrogen equivalent weight (AHEW) is between 50-750, and the preferred range is between 1 0 0-3 5 0. The viscosity range is loo-1 50 0 0 CpS (25 ° C). The mixing weight ratio of epoxy resin and hardener can be in the range of 1 / 0.3 to 1/2, depending on the relationship between the ratio of epoxy equivalent to active hydrogen equivalent of about 1, which is: bad oxygen resin Weight hardener weight epoxy equivalent value active hydrogen equivalent value

\\ Chenlm \ 19991103 \ PATENT \ pidll082.ptd Page 7 570950 V. Description of the invention (5) The filler added to the wood can be made of glass (glass h〇H〇w bead) or plastic The composition of ★ ★ work clothes (nncro sphere bead). And plastic hollow ball master = 一 #: ⑽. Di-Pollyvinyl dichl〇ride), such as plastic di- and lice-B, the low boiling point solvent, such as butane or pentane, when the epoxidant undergoes a chemical crosslinking reaction, the resulting reaction Storage, about ° C, enough to soften the polyvinyl chloride film, and low boiling: J 2 can also be formed due to thermal expansion to expand the polyvinyl chloride film: = small bubbles in the network structure, the diameter of the electrons The dryness under the microscope is between 3: 100 " m. Due to the cross-linking between the epoxy resin and the hardener, the entire resin phase has formed-an intricate and hardened The structure can set the plastic hollow sphere after thermal expansion to its size after heating, so as not to cause the phenomenon of cold shrinkage due to the end of the cross-linking reaction and the decrease in the temperature of the whole and the object. The amount of plastic hollow ball ^ is adjusted to meet the needs of the specific weight of wood. However, there are limits to its addition. The addition of Taixi not only fails to achieve the expected results, but also may increase its cost. It may also increase the difficulty of mixing and the mixing effect. It also gets worse. Generally speaking, the added ratio ranges from about 10 phr to 50 Phr (parts by weight per 100 parts by weight (like thermosetting resin + hardener)), and the preferred range is between U Phr and 30 phr. . As for glass hollow spheres, because the shell itself is covered with a layer of glass, it will not cause dimensional changes due to factors such as thermal expansion and cooling of the resin reaction heat, so it is suitable for high-exothermic or low-exothermic reactions. In the oxygen tree month system, the proportion of the overall Yoyogi is opposite to that of the glass hollow ball. The more the amount added, the smaller the Yoyogi's proportion, as long as \\ Chenlin \ 19991103 \ PATENT \ pidll082.ptd page 8 570950, description of the invention (6) does not affect the resin flow and mechanical operability, the addition of glass hollow spheres is not as strict as plastic hollow spheres, but the general addition ratio is about 10phr — 60Phr 'The preferred range is 15 phr — 4〇, and the particle size is 1050 // m in diameter, and the preferred range is-. [Example] Epoxy resin No. 丨 8 8 (viscosity 丨 00 ° CJ3S + '25 ° c' epoxy equivalent value 190) produced by Changchun Resin, take 85 parts of it and match the company's epoxy resin number 11 5 (Drillness 1 000cps, 2 5 ° C, epoxy equivalent value 19 5) Take 15 parts of it's so a total of 100 parts of epoxy resin, and then take the same 1 stomach 0 0 parts by weight The hardener number 3 丨 7 (theoretical active hydrogen equivalent, the value is about 1 80-20 0) produced by Yunde Company is mixed in equal weight ratio. Then add the total resin (epoxy resin + hardener) weight 丨 5 phr glass hollow spheres, the apparent specific gravity 〇 · 1 3 0 · 2 1 g / c m3, the particle size is about; [〇 ~ 1 2 0 // m , The average particle size is about 63, and it is mixed and stirred evenly. After more than 4 hours of hardening at room temperature, it can become a substitute wood for processing after 24 hours. The formula and measured physical properties are shown in the following table: 酉 己方 __ Oxygen resin 1 8 8 Epoxy resin 11 5 Hardener 3 1 7 Example of glass hollow ball penetration (weight) 85 15 100 30

\\ Chenlin \ 19991103 \ PATENT \ pidll082.ptd Page 570950 V. Description of the invention (7) Physical properties _ _ Density (g / cm3) 〇 · 75 Hardness ShoreD 6 6-68 The produced wood can be borrowed after testing. Cutting, shaving, planing, nailing and drilling processing methods to achieve the shape of the required prototype mold or sand turning mold

\\ Chenlm \ 19991103 \ PATENT \ pidll082.ptd page 10 570950 Schematic description \\ Chenlm \ 19991103 \ PATENT \ pidll082.ptd page 11

Claims (1)

570950 Case No. 89111965 Λ_η Revision 6. The scope of the patent application has a density between 0.4 and 0.9 g / cm3. 6 As in the method of the fourth scope of the patent application, the epoxy resin has An epoxy equivalent value between 1 85-2 50 (g / eq) and a viscosity between 500 cps (25 ° C) to 15000 cps (25 ° C). 7. The method according to item 4 of the patent application, wherein the hardener is an amine compound (am ines), which has a theoretical active hydrogen when the value is between 50 and 7 50 when 3: value (A Η EW ' activatedhydr 〇genequiva 1 e η 1: weight) and a viscosity between 100 cps (25. 0 to 15 0 0 cps (25 ° C). 8 · as in any of the claims 3 to 7 A method, wherein the weight ratio of the epoxy resin to the hardener is between 1 / 0.33 to 1/2. 9 The method according to any one of claims 1 to 7, wherein step a ) The mixture uses 15-40% by weight of plastic or glass hollow balls, based on the weight of the liquid-state thermosetting resin plus hardener. 10. The method according to item 9 of the scope of patent application, wherein the mixing of step a) uses 15-30% by weight of plastic hollow spheres with a diameter between god and 〇〇 in the form of a liquid thermosetting resin and hardener Weight sum as the benchmark. pidll () 82 amend01.ptc Page 13 2002. 02 * 20. 〇13 570950 Case No. 8911 Month, Day, 1965 Amendment pull 1082amend01.ptc page 14 2002.02.20.014 Fix 91il ° § 570950 Case No. 89111965 6. Scope of patent application Please indicate whether the original substance content will be changed after the amendment of this case 1. A method for preparing a thermosetting plastic wood substitute for making prototype molds or sand-turning molds, including the following steps: a) mixing a liquid thermoset Resin, a hardening agent that hardens the liquid thermoset tree, a chemical curing agent, and 10 to 60% by weight of a plastic or glass hollow ball with a particle size between 10 and 150, in the liquid state Based on the weight of the thermosetting resin plus the hardener, the liquid thermosetting resin does not contain a foaming agent; b) the mixture obtained in step a) is poured into a mold; and c) the mixture in the mold is hardened to form A hardened plastic wood substitute with a network structure of 5 5 _ 7 〇Shore D hardness and 10 ~ 150 // m mesh openings. 2 · The method according to item 1 of the patent application, wherein the liquid thermosetting resin is epoxy resin, unsaturated polyester resin (up, unsaturated polyester resin) or polyurethane (PU, polyurethane) ) 〇3 · The method according to item 2 of the patent application range, wherein the liquid thermosetting resin is an epoxy resin (e ρ ◦ X yresi η). 4. The method of claim 3, wherein the epoxy resin has an epoxy equivalent value between 1 70-50 0 (g / eq) and an epoxy equivalent between 50 0 cps (25DC ) To 15 0 0 0 cps (25.0. Viscosity. 5) The method according to item 3 of the patent application, wherein the hardened plastic puil 1082amend01 .ptc page 12 2002.02.20.012