JPH03155881A - Tee molding for golf and its production - Google Patents

Abstract

PURPOSE:To provide the tee which collapses in shape by natural phenomena, such as rain water, by using a molding material consisting of natural raw materials contg. silicates, water soluble binders having thixotropy and water and subjecting the material to cold injection molding. CONSTITUTION:The tee molding for golf consists of the molding material contg. the natural raw materials such as one or >=2 kinds of the silicates, as the main raw material and one or a >=2 kinds of the water soluble binders having the thixotropy and a proper volume of water as essential components in order to cause the collapse of the molding and the collapse of its shape by the natural phenomena, such as rain water. The above-mentioned water soluble binders are incorporated at 2 to 20 pts.wt. in 100 pts.wt. natural raw materials. The molding material is used and is molded by the cold injection molding method in order to efficiently produce the tee molding for golf.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a golf tee molded article and a method for manufacturing the same.

[Conventional technology]

Conventionally, many golf tees made of plastic or wood have been commercially available.

However, these can cause damage to lawn mower blades and make fairway maintenance difficult, and have recently become a major problem at golf courses.

The use of plastic or wood as a molding material is advantageous in that each is suitable for hot injection molding or cutting, but golf tees made from such molding materials are less likely to be exposed to natural elements such as rainwater. Since the shape does not collapse due to the phenomenon, it cannot solve the above-mentioned problems.

On the other hand, other methods for forming golf tee moldings include extrusion, dry pressing, rubber pressing, semi-wet pressing, a combination of extrusion and semi-wet pressing, and casting. It has been considered and implemented. In these methods, after molding, post-processing such as cutting is performed to form the shape of a golf tee, and methods are also being considered in which surface coating is performed for the purpose of improving moisture absorption resistance and strength.

However, since golf tees have a complicated shape, the above-mentioned general molding method has a low yield of molded products, and it is difficult to efficiently manufacture the golf tees because of post-processing.

Next, problems with each molding method will be listed.

■ The extrusion method is a semi-wet molding method using water-soluble polymers, plasticizers, lubricants, etc. The above material is extruded into a cylinder from a specified die, cut to a certain size, and then shaped into a specified shape. This is a method of cutting using a ceramic grindstone. However, in this method, the raw material is cut, resulting in a large loss of raw material, and the molded product is likely to crack or deform during processing.

■ In the dry press method, - For boat fishing, water-soluble polymers, plasticizers, lubricants, and ceramic raw material powder are mixed in a slurry using a mechanical press or hydraulic press, and then granulated using a spray dryer. Pour the powder into the specified mold and heat it for about 1
Pressure molding is performed at a molding pressure of ton/c1 or more. However, with this method, only a simple shape can be manufactured, post-processing is required, and the molded product is prone to cracking, making processing very difficult.

■ The rubber press method is a method in which the spray-dried granular powder used in the dry molding press method is injected into a rubber mold and press-molded to obtain products with complex shapes.
In this molding method, the shape of the molded product is insufficient, and the molded product must be cut using a grindstone or the like for processing and finishing, resulting in loss of raw materials and high cost.

■ In the semi-wet press molding method, ceramic raw material powder is
A method in which water, a water-soluble polymer, a plasticizer, etc. are added, the particles are passed through a sieve (screen mesh) in a semi-wet state, the particles are sized by a method such as rolling, and then the particles are put into a designated mold and formed. It is.

This molding method allows molding into shapes that are impossible with the dry press method, but requires control of the moisture content of the raw materials, is difficult to remove from the mold, and has low density and strength. does not appear.

■ A combined method of extrusion and semi-wet press molding involves drying the extruded cylindrical molded product until it reaches a predetermined moisture content, then cutting the molded product into predetermined lengths in the length direction, and pressing it. In this method, a cylinder is placed in a mold, press molding is performed, and the molded product is taken out from the mold.

Therefore, in this method, it is necessary to control the moisture content of the raw material from the time of extrusion molding so that the moisture content is suitable for semi-wet press molding. During semi-wet press molding, it is difficult to control moisture, which causes adhesion to the mold, and the process takes time, significantly hindering manufacturing efficiency.

■ Cast molding is a molding method used to obtain ceramic molded products with complex shapes. It creates a slurry by mixing ceramic powder, water, and a dispersant, and forms a stone = l'F.
This method involves pressure injection into the mold to absorb water into the stone mold, and then demolding to obtain a molded product.The dimensional accuracy of the molded product is poor, the molding time is long, and the manufacturing efficiency is extremely poor.

As mentioned above, none of the above-mentioned molding methods is suitable as a method for manufacturing golf tee molded bodies, but is a method that can efficiently manufacture golf tee molded bodies without post-processing. development is desired.

[Problem to be solved]

An object of the present invention is to improve the above-mentioned drawbacks of conventional golf tee molded bodies and to provide a golf tee molded body made of a molding material whose shape collapses due to natural phenomena such as rainwater. Furthermore, it is another object of the present invention to provide a method for efficiently manufacturing a golf tee molded body using such a molding material without performing post-processing.

[Means for Solving the Problems] Since the golf tee molded article of the present invention collapses due to natural phenomena such as rainwater and collapses in shape, a) one type or two or more types of silicic acid is used as the main raw material. It consists of a natural raw material containing salt, b) one or more water-soluble binders having thixotropy, and C) a molding material containing an appropriate amount of water as an essential component,
Moreover, the water-soluble binder is contained in a ratio of 2 to 20 parts by weight based on 100 parts by weight of the natural raw material.

In the present invention, plastic raw materials such as Kibushi clay, Frogme clay, kaolin, and pottery stone can be used as natural raw materials containing silicate, and these raw materials have plasticity when added with water, and can be molded. In order to improve the properties and strength of the molded body, it becomes possible to carry out molding using a small amount of binder within a practical range. In addition, the above-mentioned raw materials also help prevent poor mold release and poor shape retention that occur when a large amount of binder is present.

On the other hand, as water-soluble binders used as molding aids, those with high thixotropy when dissolved in water have good moldability, and among them, methylcellulose, methylhydroxyethylcellulose, methylhydroxypropylcellulose, salts of carboxymethylcellulose, and hydroxyethylcellulose Cellulose-based materials such as are very suitable. In addition, polyethylene oxide, polyacrylamide, alginic acid salts, etc. can be used for the same reason, and if these are used as the main binder ingredients, water-soluble binders such as starch, gum arabic, and lignin sulfonic acid salts can also be used. It is possible.

In addition, in the present invention, a plasticizer and a lubricant can be added as necessary, and plasticizers include ethylene glycol, diethylene glycol, glycerin, pentamethylene glycol, phthalate ester, etc. You can use the one used in Furthermore, fatty acids, fatty acid metal salts, fatty acid emulsions, wax emulsions, higher alcohols, and the like can be used as the lubricant.

Since the above-mentioned natural raw materials containing silicate and the water-soluble binder are soluble in water, the shape of the golf tee molded article can be disrupted by natural phenomena such as rainwater.

At this time, the addition range of the water-soluble binder is 2 to 2 parts by weight per 100 parts by weight of the natural raw material.
It is preferably contained in a proportion of 0 parts by weight. If the amount of the water-soluble binder added is less than 2 parts by weight, the plasticity will be insufficient and molding will not be possible, and the strength will also be weakened, making handling difficult. On the other hand, if the amount is more than 20 parts by weight, the strength and plasticity are good, but the releasability from the mold becomes poor.
It becomes difficult to remove it from the mold, resulting in very poor workability. In addition, the shape retention during removal from the mold also deteriorates.

Furthermore, if a natural raw material containing silicate that enhances plasticity is used, the amount of water-soluble binder added can be reduced.

The present invention also provides a method for manufacturing a golf tee molded article, which uses the above-mentioned molding material and molds by a cold injection molding method in order to efficiently manufacture the golf tee molded article. It is.

The cold injection molding of the present invention is a method of injection molding at room temperature, which is excellent in mass production by being able to use an injection molding machine used as a plastic molding machine, and is also suitable for molded products having complex shapes. also has excellent filling properties,
A uniform product can be obtained. Therefore, by using this molding method, desired molded products of various shapes can be obtained efficiently and no post-processing is required.

This cold injection molding method is performed, for example, by the following method. First, the above-mentioned natural raw materials, water-soluble binder, and water are mixed in a kneader, pelletized by an extrusion granulator, and then charged into a pressurized cylinder of an injection molding machine. And the injection pressure is 200 kg/c1~100 at room temperature.
The molding material of the present invention is filled into a clamped mold under conditions of 0 kg/cm' to form a desired shape, and then the mold is opened and the product is taken out.

As the injection molding machine used for the cold injection molding of the present invention, either a screw type or a plunger type can be used, but the plunger type is easier to handle in terms of a wider molding tolerance range. .

In addition, in the present invention, a urethane resin can be used as a coating agent to perform surface coating on the golf tee molded article after cold injection molding, for the purpose of improving moisture absorption resistance and strength.

〔Example〕

Example! The above composition was mixed into a kneader (manufactured by Fuji Paudal ■, kneader capacity: 3).
A mixture is prepared by mixing for 30 minutes in step 1), and the mixture is injected at 550 kg/c using a Blunger Quibb injection molding machine (3/II oz manufactured by Yamaguchi Seiki Seisakusho).
The shape of a golf tee is formed by injection molding at m2, and the molded body is further dried at 100°C to 110'C for 1 hour, and then the surface is coated with a commercially available urethane resin to form the golf tee of the present invention. I got a body.

In Examples 2 to Comparative Examples 4 below, golf tee molded bodies were produced in the same manner as in Example 1 except that the mixture composition was changed.

Example 2 30 parts by weight of water Glycerin (plasticizer) 1 part by weight Water 21 parts by weight Example 3 18 parts by weight of water Diethylene glycol (plasticizer) 2 parts by weight Sodium oleate (lubricant) 1 part by weight Example 4 Comparative example 2 : When the amount of water-soluble binder is large (molecular weight 50
00,000 parts by weight) 15 parts by weight Water 20 parts by weight Example 5 Comparative example 3: When the amount of water-soluble binder is large Silica stone (main component quartz) 100 parts by weight Water 70 parts by weight Water 20 parts by weight Comparative example 4: When the amount of water-soluble binder is large If the golf tee molded bodies obtained in Example 1 to Comparative Example 4 above were evaluated for moldability (fillability, mold releasability, shape retention), strength, and appearance of the molded bodies. , as shown in Table 1 below.

Cannot be filled at all × Span deformed during demolding 30rnll+ Strength 100 kgf/co+” molded bodies cracked during use and could not be used practically.

*Fillability, mold releasability, shape retention, and appearance of molded products are determined by visual inspection.

The golf tee molded bodies of the present invention produced in Examples 1 to 5 above were used in actual use (for tee molded bodies that did not have an open surface and were broken during use, they swelled with rainwater and the shape changed. Almost completely collapsed.

〔Effect of the invention〕

The golf tee molded article of the present invention uses a natural raw material and a water-soluble binder whose shape collapses due to natural phenomena such as rainwater as the molding material. Damage to the blade and fairway maintenance can be reduced.

Furthermore, by using the cold injection molding method of the present invention,
Molded products of various shapes can be easily manufactured without post-processing, the yield of products is significantly improved, and mass production becomes possible.

Claims (2)

[Claims] (1) a) a natural raw material containing one or more types of silicate as the main raw material, b) one or more water-soluble binders having thixotropy, and c) an appropriate amount of water as essential ingredients. consisting of a molding material containing
A golf tee molded article comprising 2 to 20 parts by weight of the water-soluble binder based on 100 parts by weight of the natural raw material. (2) A method for manufacturing a golf tee molded article, which comprises using the above-mentioned molding material and molding by cold injection molding.