JP3081078B2 - Forming mold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to concrete and clay,
In relation to a shaping mold for transferring a decorative pattern such as an uneven pattern on the surface of a shaped material such as a resin, more specifically, it has an uneven pattern or the like and has a releasability from the shaped material such as concrete, clay and resin. The present invention relates to a shaping mold that is good, has high durability, and does not emit harmful substances when discarded.

[0002]

2. Description of the Related Art In recent years, concrete surfaces such as buildings, river revetments, road side walls, and retaining walls of residential land development sites have been equipped with stone wall patterns and tiles to moisturize urban and natural environments.
Various uneven patterns such as a person pattern are preferably formed. For this purpose, a synthetic resin plate having a pattern provided on the surface of a mold that comes into contact with concrete has been used.

[0003] As such a decorative mold, a foam such as polystyrene, polyethylene, or polyurethane is generally used. Examples of these are found in Japanese Utility Model Publication Nos. 2-4710, 3-49848 and 2-34765. In general, such a synthetic resin foam form tends to adhere to the concrete side when the form is peeled off from the concrete surface after casting concrete, and it takes time to remove the form from the concrete surface. Take
Furthermore, it is peeled from the concrete surface while destroying the formwork. Moreover, as described above, the form of the synthetic resin foam is one.
It is discarded after multiple uses and is very uneconomical. Also,
Disposal of waste materials is also difficult, and in view of recent waste measures,
Measures are needed.

[0004] In addition, when making a shaped article that gives color to the living environment such as false trees, false rocks, and reliefs in a garden or an amusement park, conventionally, plaster, clay, FRP (fiber reinforced plastic), or the like for molding is applied. A decorative pattern such as an uneven pattern is formed on the surface of a shaped material such as concrete, clay, or resin by using as a formwork. Of these molds, gypsum and clay have the problem of low strength for repeated use. In addition, in the case of FRP, when a decorative pattern is applied to a shaped material such as concrete, clay, resin or the like, a mold release agent must be applied to the surface of the mold for each molding to form the material. There is a problem that the releasability from the mold is very poor, the cast material adheres to the mold, and if used repeatedly for a long time, the surface of the mold is broken and cannot be used.

On the other hand, a semi-rigid polyurethane or rubber having a hard integral skin layer as a surface layer is used as a decorative mold with an uneven surface. Examples of these include:
Japanese Utility Model Publication No. 57-129851, Japanese Utility Model Publication No. 3-48377, Japanese Utility Model Publication No. 4-2849, and the like can be seen. The surface of these forms is elastic, and when the irregularities on the concrete surface are complicated, the releasability from the concrete surface is relatively good, but the strength is insufficient for long-term repeated use. It breaks during use. In addition, when the mold is released from the concrete after the concrete is cast, concrete residue adheres to the surface of the form, and in order to reuse it, the residue must be carefully removed, which is not only troublesome. However, even if it is performed, it is repeated about 10 times at most, and a mold with a longer life is desired. In addition, when discarded, these synthetic resins containing sulfur and nitrogen elements are liable to generate nitrogen oxides and sulfur oxides when burned, and must be properly burned in an incinerator equipped with pollution treatment equipment.

[0006] Japanese Patent Application Laid-Open No. 4-201409 discloses a mold frame whose design surface is formed by vacuum molding of synthetic resin. This vacuum forming forms good irregularities in a simple shape, but in the case of a complicated shape, especially in the case of a so-called deep drawing pattern, the resin layer tends to be uneven in thickness, and the strength tends to be insufficient. There is a need for a method of hollowing out and reinforcing the foam inside. In addition, using a thermoplastic resin, such as polyethylene, which has a low heat distortion temperature and tends to retain residual stress during molding, if it is used for a long time for concrete casting, it will be exposed to high temperatures in summer, The pattern on the surface is deformed, or the synthetic resin surface expands, causing warpage and making it unusable as a mold.

[0007]

Conventionally, a method of extending the life of a mold is, firstly, to have an appropriate strength in order to prevent breakage. Improvement has been pursued. To this end, the use of organic substances on the surface in contact with concrete has hitherto been performed. For example, urethane rubber and silicone rubber (JP-A-49-69749), polyolefin resin blended with a lubricant such as liquid paraffin and carboxylic acid (JP-A-52-93134, JP-B-53-15843,
Japanese Patent Publication No. 3-22805), high hardness urethane resin (Japanese Patent Application Laid-Open No. 52-126416, Japanese Patent Publication No. 58-29965), polypropylene resin (Japanese Patent Application Laid-Open No. 60-25706), polyolefin resin (actual). Japanese Patent Application Laid-Open No. Sho 60-110539), a product obtained by bonding and coating a polyolefin resin (Japanese Patent Application Laid-Open No. 60-190270).
JP-A-2-301405, JP-A-3-30913), synthetic resin latex (JP-A-61-25804), FRP mold with a fluorocarbon resin as a surface layer (JP-A-61-188104) ), Metal formwork with fluororesin as the surface layer
No. 3908), polyphenylene sulfide coating film (Japanese Utility Model Laid-Open No. 2-133304), application of paint (for example,
306, JP-A-3-193302, JP-A-3-200881, and JP-A-61-58298), but the use of various resins is disclosed, but all of them are still satisfactory. Not something.

The present invention has been made in order to solve the above-mentioned problems, and it is intended to use a norbornene-based bulk polymer containing a specific release agent, and to provide a concrete having a complicated uneven surface even if it has a complicated uneven surface. Molding materials such as clay, resin, etc. do not adhere to the shaping mold, have better releasability than before, can be used repeatedly over a long period of time, and can be easily incinerated when discarded. An object of the present invention is to provide a shaping mold form that can be collected as a mold.

[0009]

According to a first aspect of the present invention, there is provided a norbornene-based bulk polymer layer having an uneven pattern formed by sections of various shapes and sizes on a surface which comes into contact with a shaped material such as concrete, clay or resin. A shaping formwork comprising:
A shaping mold in which the polymer layer is substantially composed of carbon and hydrogen and contains at least one of paraffin and wax which are solid at room temperature.

The second invention is characterized in that the norbornene-based bulk polymer layer contains at least one of paraffin and wax in a range of 0.5 to 50 parts based on 100 parts by weight of the polymer layer. It is a formwork.

[0011]

In order to form a resin layer composed of a norbornene-based bulk polymer, this polymer is composed of dicyclopentadiene as a main component and is subjected to reaction injection molding (Re) using a metathesis polymerization catalyst.
action Injection Molding (RIM for short) or resin transfer molding (R for short)
Molded with high dimensional accuracy by TM).

In the RIM or RTM molding method, since a molding material is liquid, a complicated large-sized molded article can be molded relatively inexpensively and easily, and a surface pattern can be easily formed. Commercially available materials include Meton (trade name, manufactured by Teijin Hercules) and Pentam (trade name, manufactured by Zeon Corporation). This resin is a polyolefin resin containing dicyclopentadiene as a main component, has rigidity and impact resistance, and has a property of not being attacked by acids or alkalis. When the wall thickness is increased or reinforced with a rib structure, it has the rigidity that can be used as a shaping mold for shaped materials such as concrete, clay and resin, so this resin alone can be used as a shaping mold, or Alternatively, a metal frame or plywood and this resin layer may be overlapped and integrated to be used as a shaping mold. When combined with an aluminum frame as a metal frame, it becomes a lighter and more rigid shaping mold. On the other hand, as a method for increasing the rigidity of the resin itself, fiber reinforcement such as glass fiber of the prior art can also be used.

In preparing a resin layer composed of such a norbornene-based bulk polymer, at least one or more paraffins and waxes, which are essentially composed of carbon and hydrogen and are solid at room temperature, are blended and molded.
The compound substantially consisting of carbon and hydrogen means that it does not contain a polar compound which does not inhibit a reaction of forming a polymer by ring-opening polymerization of a norbornene monomer by a metathesis reaction. It is a hydrocarbon compound in chemical structure.
Such compounds are chemically stable and can be easily incinerated as carbon dioxide and water when incinerated.

Here, room temperature refers to a temperature of 25 ° C. or lower, and a solid is a solid substantially in a single state, and generally has a melting point of room temperature or higher. Liquid paraffin, which is liquid at room temperature, is known as paraffin, and these substances can impart releasability to a norbornene-based bulk polymer by adding a small amount thereof to concrete, clay, or a shaped material such as a resin. The effect is diminished during long-term repeated use as a shaping mold. Further, since the thermal deformation temperature of the norbornene-based bulk polymer is lowered, deformation and warpage are likely to occur during long-term use. From such a viewpoint, it is limited to paraffin and wax which are solid at room temperature.

[0015] Specific examples include natural paraffin, microwax, synthetic wax, and low polymerization degree polyethylene (polyethylene wax). Examples of natural paraffin include soft paraffin, various paraffins (manufactured by Nippon Oil), and paraffin wax (manufactured by Nippon Oil and Shell Sekiyu). Examples of the microwax include those manufactured by Suntight (Seiko Chemical) and Nippon Oil. Examples of the polyethylene wax include Hoechst wax and high wax (manufactured by Mitsui Petrochemical).

The amount of paraffin and wax contained as a release agent is in the range of 0.5 to 50 parts, preferably 1 to 100 parts by weight of the norbornene-based bulk polymer layer.
30 to 30 parts. If the content is less than 0.5 part, the releasing effect from the concrete layer such as concrete, clay, and resin on the surface of the polymer layer is small, and if the content is more than 50 parts, the rigidity and strength of the polymer layer are reduced. . Therefore, the amount of paraffin and wax contained in the polymer layer is
The range is 0.5 to 50 parts by weight based on parts by weight.

These release agents may be used alone or in combination. When used in combination with a lubricant, which is another compounding agent, the effect of releasing from a shaped material such as concrete, clay or resin is further improved. That is, oils such as paraffin oil, naphthenic oil and silicone oil, particles such as Teflon and fine-particle polyolefin, molybdenum disulfide, talc, etc.
Use 1 to 5 copies.

For the purpose of improving the life and appearance of the norbornene-based bulk polymer, various known antioxidants, ultraviolet absorbers, pigments, dyes, fillers, impact modifiers and the like can be used in combination. . Further, for the purpose of weight reduction, a foaming molded article can be formed by using a foaming agent in combination.

Further, in order to increase the rigidity of the norbornene-based bulk polymer, reinforcing fibers such as glass fiber, polyvinyl alcohol fiber and polyethylene fiber can be used in combination. In addition, a small amount of metal powder can be used in combination to increase the thermal conductivity of the mold.

The surface of the resin layer of the norbornene-based bulk polymer is provided with an uneven pattern when the resin layer is formed. The patterns include patterns of wood grain, annual rings, bricks, tiles, stone walls, people, and the like. The depth of the recess is preferably between 1 mm and 200 mm. If it is 1 mm or less, the design as a pattern is poor, and if it is deeper than 200 mm, it is difficult to fill the concrete with concrete during casting. The shape of the curved surface around the pattern is not particularly limited, but it is preferable to avoid a sharp curve change because concrete is easily chipped. Also, the draft should be at least 2 degrees.

A method of providing a pattern on the surface of the resin layer is the same as that of RI
Utilizing the fact that the molding pressure, which is a feature of the M molding, may be low, the following is performed. Wood, gypsum, sand, resin,
Prepare a master pattern made of metal. This master pattern is set as a stand in a flat mold, and a release agent is applied to the surface of the stand as required, then the resin of the raw material is poured and cured, and then the mold is removed, and the intended pattern is removed. Is applied to the surface of the resin layer. The master pattern can be easily changed as needed. Further, the surface of the resin layer obtained in this manner well transfers the surface pattern of the master. For example, if a master mold with a smooth surface is prepared, the surface will become a resin layer with a smooth surface, and when shaping a shaped material such as concrete, clay, or resin, the shaping mold from the shaped material The releasability is improved.

[0022]

The embodiments will be described below. The performance of various shaping molds was evaluated by using commercially available methone as the norbornene-based bulk polymer as follows. In other words, a metathesis cocatalyst containing an organoaluminum compound or an impact-resistant elastomer, a dicyclopentadiene monomer A solution containing an antioxidant, and a metathesis catalyst containing a tungsten-based compound or an impact-resistant elastomer and an antioxidant B liquid containing a dicyclopentadiene monomer is prepared in a tank under a nitrogen gas atmosphere. The releasing agent shown in Table 1 is added to the liquid B and mixed well. The temperature of each raw material liquid is maintained at 30 ° C.

From the tanks of the liquids A and B, the flow rates of the gear pumps of the respective tanks are adjusted so that the monomer amount of the liquid A and the monomer amount of the liquid B become 100: 100, and the liquids A and B are supplied to the static mixer. After supplying and mixing well, the mixed liquid is poured into a predetermined mold heated and maintained at a temperature of 60 ° C., and reacted for 3 minutes. Then, a molded product (formation mold) is removed from the mold. Take out.

At this time, one side of the mold was 200 mm × 200 m.
m is a stone wall pattern with a 25 mm uneven depth, the other side is a 200 mm × 200 mm section is smooth, and the distance between the smooth surface of the mold and the concave part of the stone wall pattern (the convex part on the concrete surface) is at least 3 mm or more.

A cement consisting of 1 part of Portland cement, 3 parts of sand and 0.6 part of water was poured into the obtained shaping mold with a hook for measuring the demolding force attached, and left at 50 ° C. overnight. Thereafter, the form was removed from the concrete. At that time,
The release force between the shaping mold and the concrete was measured using a spring balance, and the shaping mold was evaluated. Also, after this operation was repeated 10 times, the releasing force and the state of adhesion of concrete dirt on the surface of the shaping mold were observed. Table 1 shows the results.
FIG. 1 shows the appearance of the concrete after casting. Table 1 also shows, as a comparative example, an example in which a release agent (paraffin, wax) was not used.

Further, as Example 6, FRP molding was carried out as follows using the shaping molds of Example 1 shown in Table 1. That is, an unsaturated polyester resin containing about 20% chopped glass fiber was manually laminated on a shaping mold so as to have a substantially uniform thickness of 4 mm, and then cured. Thereafter, the shaping mold was peeled off from the FRP molded body. As a result, the shaping form can be easily FRP
It could be peeled off from the molded body.

As shown in Table 1, the shaping mold of the present invention has a chemically stable paraffin or wax molecule on the surface of the mold, thereby increasing the water repelling force and at the same time.
The interface between the shaped material such as concrete, clay, or resin and the shaping mold becomes slippery, and the releasing force is reduced. Also,
Due to the presence of paraffin and wax inside the norbornene-based bulk polymer, these molecules ooze out from the inside of the shaping mold surface and maintain good release properties even after long-term repeated use can do.

[0028]

[Table 1]

[0029]

Industrial Applicability The present invention is directed to a shaping method in which a norbornene-based bulk polymer layer having an uneven pattern with sections of various shapes and sizes is provided on a surface which comes into contact with a shaped material such as concrete, clay or resin. A molding frame, wherein the polymer layer is substantially composed of carbon and hydrogen and contains at least one of paraffin and wax which are solid at room temperature. Since the frame contains paraffin and wax as a release agent, even if the shape is a complicated uneven surface, concrete or clay, resin or other shaped material does not adhere to the shaping mold, It has an excellent effect that it has better releasability than before, can be used repeatedly for a long period of time, can be easily incinerated when discarded, and can be recovered as heat energy.

[Brief description of the drawings]

FIG. 1 is a view showing the appearance of a concrete molding surface cast using a shaping mold of the present invention.

Continuation of front page (56) References JP-A-5-116167 (JP, A) JP-A-5-169541 (JP, A) JP-A-5-51413 (JP, A) JP-A-5-426 (JP) , A) JP-A-6-114816 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B28B 7/16 B29C 33/38

Claims (2)

(57) [Claims] 1. A shaping mold comprising a norbornene-based bulk polymer layer having an uneven pattern formed by sections of various shapes and sizes provided on a surface which comes into contact with a shaped material such as concrete, clay or resin. Wherein the polymer layer substantially comprises carbon and hydrogen and contains at least one of paraffin and wax which are solid at room temperature. 2. The method according to claim 1, wherein at least one of paraffin and wax contained in the norbornene-based bulk polymer layer is contained in the polymer layer.
2. The shaping mold according to claim 1, wherein the amount is 0.5 to 50 parts by weight per 100 parts by weight.