KR20110003977A - Conveyor board and how to make it - Google Patents

Abstract

PURPOSE: A conveyer board and a manufacturing method thereof capable of reducing manufacturing costs and weight by omitting a brace bar are provided to improve abrasion resistance, impact resistance and the rigidity of DP5D and to minimize noise in use. CONSTITUTION: A manufacturing method of a conveyer board is as follows. One is selected from nonferrous metal, a high-pressure laminated plate, a compressed wood, a synthetic resin board and glass fiber in order to be manufactured to a core material(2) with desire size. A skin part is heated and dried and core is input into in the mold. The prepolymer DP5DP including an isocyanate group and the prepolymer DP5DR including a hydroxyl group are mixed by an automatic molding device.

Description

Conveyor board and how to make it

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveyor board and a method of manufacturing the same, and more particularly, to a conveyor board and a method of manufacturing the same, used for the purpose of assembling (production) and transporting a product in an automated line of various products.

In the conventional conveyor board used, the base portion is formed of an outer shell by processing various materials such as steel, plywood, and synthetic resin into a core material and applying foamed urethane, general urethane, or urethane flooring material to the outside of the core material.

Conveyor boards made of these materials, however, are particularly noisy, heavy, friction with line components, wear of lines or conveyor boards, difficulty in changing configurations, and expensive. Several disadvantages have been pointed out.

In addition, the board composed of synthetic resin is severely deformed by the temperature, it is weak to impact, and in particular, it can not withstand the load of lightweight products has been used to configure the reinforcement separately. Since these resin boards have their own rigidity without reinforcing material, the core material made of synthetic resin foam alone can not support the upper object and may be damaged during use. The urethane of the skin coated on the outer surface of the core material is core material. After a certain period of time, the adhesive strength of the adhesive and the peeling with the core material peeled off, and also because the urethane itself lacks the stiffness of supplementary stiffness as supplementary stiffness was possible to use. These shortcomings can have a significant negative impact on the role of basic automation and production, and can lead to problems that lead to downtime.

Therefore, in the present invention, to solve all the problems that the conveyor board for the existing automation line,

In addition to the weight reduction of the conveyor board, in particular, to prevent deformation, the raw material having its own rigidity is coated with the front or partial surface coating of the core material so that the constant load of the conveyor board does not require reinforcement by its rigidity.

It also minimizes noise, improves abrasion resistance, compatibility with configuration changes, and enables low cost manufacturing of conveyor boards. It is to provide a manufacturing method.

The conveyor board and its manufacturing method provided by the present invention has a rigidity by itself as the DP5D coating the core material, but in order to strengthen more than a certain level of non-ferrous, high-pressure laminated plate, compressed wood, resin board (Polymer Material) board, glass fiber, or any one of the inner core material, and then the skin is DP5D. The coating was performed.

The core material is to use any one of the non-ferrous, high-pressure laminated plate, compressed wood, polymer material board, glass fiber, and only the skin part to use DP5D to secure price competitiveness Of course, it is possible to minimize the occurrence of noise, and provide effects such as stiffness, impact resistance, and wear resistance.

Conveyor board manufactured by the present invention is capable of manufacturing the hardness of the product more than Shore A 90 and D 40D or more and light weight, minimizing the generation of noise during use, the DP5D's own stiffness and impact resistance, improved wear resistance, It provides a number of effects, such as providing compatibility for changes in the configuration, making it possible to manufacture at low cost due to light weight and no need for reinforcement.

The present invention relates to a conveyor board and a method for manufacturing the same, and more particularly to a conveyor board and a method for manufacturing the same for the purpose of assembling (production) and transport of the product in the automation line of various products, The conveyor board 1 is composed of an inner core 2 and an outer skin 3 for coating the inner core 2 as shown in FIGS.

More specifically, the conveyor board 1 according to the present invention is selected from non-ferrous, high-pressure laminated plate, compressed wood (Compressed wood), plastic material board (Polymer Material board), glass fiber (glass fiber) to the core material to the desired dimensions Making (2); Injecting the core material (2) into a mold (4) heated, dried, and having a release agent applied thereto so that the skin portion (3) is coated and molded on the exterior of the core material (2); Mixing the prepolymer DP5DP comprising an isocyanate group and the DP5DR comprising a hydroxyl group on an auto molder to form the skin portion 3; Filling the mixed DP5D stock solution with a mold 4 cavity to mold the skin 3; Conveying the mold after the molding process is completed in the mold and demolding; consists of.

First, the core material (2) selectively uses any one of non-ferrous, high-pressure laminated plate, compressed wood (compressed wood), a resin material board (Polymer Material board), glass fiber (glass fiber), to make a conveyor board (1) Cut the inner core material 2 in accordance with the design drawing.

In order to prevent chemical reactions when coating the outer skin part 3, the inner core material (2) after processing is measured to have a moisture content of 5 to 15% or less after being forced to dry for 30 to 60 minutes or more in a dryer or nature. . That is, since the isocyanate (NCO Group) in the composition constituting the DP5D stock solution reacts with the active hydrogen present in the water and foams, it is preferable to remove the water in the core material 3 and the mold 4.

The DP5D stock solution is used by mixing DP5DP and DP5DR, which will be described later. DP5DP is a prepolymer containing an isocyanate group, and DP5DR is a polyol containing a hydroxyl group.

The core material 3 also inserts consumables such as bolts and nuts required for attachment and structure assembly and attachment when inserted into the mold 4.

In addition, since the chemical reaction accompanying the molding of the skin portion 3 using the DP5D stock solution is exothermic reaction of 100 ° C. or higher, the mold 4 is preheated to 40 to 100 ° C. so that the energy required for the heat generation is not lost to the outside. After warming, a release agent is applied to the inside of the mold 4.

When the release agent is applied to the inside of the mold 4 and the inside of the mold release agent, the sample is warmed separately in an oven, and then the DP5D stock solution is added to the tank forming the automatic molding machine after the phase change into a liquid phase, and the color of the desired color is added to the dye tank. If necessary, vacuum degassing may be carried out to remove bubbles in the stock solution.

Since the stock solution may be solidified (waxed) when the temperature is lowered, the stock solution is always maintained at a temperature of about 40 ° C. or more.

And according to the reactivity to adjust the amount of catalyst appropriately.

As such, when the raw material is formed, the core material is inserted into the mold 4, and then the DP5D stock solution is introduced into the mold 4 through the DP5D undiluted automatic molding machine. It is only necessary to demold the conveyor board (1).

When each raw material is discharged and the reaction starts, it has a viscosity of about 400 ~ 800cps, and when it reaches about 2,000cps, the flow rate drops sharply. After this point, it reaches the point of reaching about 70% of the final property of this raw material. Set the demolding time. Demolding time of the raw material is about 10 ~ 50min.

Looking at the preferred embodiment of the present invention as follows.

(Example)

To fabricate the conveyor board (1), cut any one of the non-ferrous, high-pressure laminated board, compressed wood, polymer material board, and glass fiber to the designed dimensions with the inner core material (2). After that, the core material (2) is dried or pretreated.

The non-ferrous, high-pressure laminated plate, reinforced wood, synthetic resin board, glass fiber may be used separately, respectively, non-ferrous, high-pressure laminated plate, reinforced wood, synthetic resin board is formed as a frame (2a) as shown in Figure 3 between the frame (2a) It may be formed of a core material 2 by filling with a filler 2b such as glass fiber.

In addition, the non-ferrous, high-pressure laminated plate, the reinforcing wood may be formed of a frame (2a) and the space between the frame (2a) may be formed of a core material (2) by filling with a synthetic resin.

And the outer skin portion 3 is coated on the outer core material 2 is used as a DP5D composition according to the present invention, the DP5D composition is It consists of the two-component type of a main body and a hardening | curing agent.

The subject is produced by reacting a polyol compound with an isocyanate compound and includes a urethane prepolymer having an isocyanate reactor at the resin end. A urethane resin having a hardness range of Shore 40D or more is prepared by mixing an appropriate polyol or a curing agent with a urethane prepolymer. As the polyol used in the polyurethane resin production, polyether polyols, polyester polyols, phenolic polyols and the like can be used. Polyether polyols are obtained by addition reaction of alkylene oxides such as ethylene oxide and propylene oxide to polyhydroxyalkane or amine compounds. Examples of the hydroxyalkane include glycols such as ethylene glycol and propylene glycol, glycerol and trimethylolpropane. Polyols may be used, and ammonia, triethanolamine, ethylenediamine, or the like may be used as the amine compound. Polyester polyols are obtained by the reaction of one or more diols with dicarboxylic acids containing from 2 to 20 carbon atoms. Polyester polyols are prepared by condensation reactions of acids with glycols or polyols. Examples of dicarboxylic acids include aliphatic divalent acids such as adipic acid, succinic acid, akelic acid, sebacic acid, suberic acid and glutaric acid, and aromatic acids such as phthalic acid, isophthalic acid, terephthalic acid and naphthenic acid. Included.

Suitable diols of this polyurethane include glycols containing 2 to 20 carbon atoms, for example ethylene glycol, diethylene glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, and the like. And polyhydric alcohols such as glycerol, trimethylolpropane, pendaerythritol and the like. Also included are lactone polyester polyols obtained by ring-opening polymerization of cyclic esters such as caprolactone.

Isocyanates used in polyurethanes include aromatic, saturated or unsaturated cyclic compounds, aliphatic compounds, and the like, and examples thereof include toluene diisocyanate, 4,4-diphenylmethane diisocyanate, xylene diisocyanate, hydrogenated diphenylmethane diisocyanate, Isophorone diisocyanate, cyclohexanediisocyanate, hexamethylene diisocyanate and the like.

Examples of the crosslinking agent include diethanolamine, triethanolamine, diisopropanolamine, tetraethylenepentamine, 4,4'-methylenebis (2-chloroaniline), diethylenetriamine, xylenediamine, 1,3-diaminopropane, Isophoronediamine, 1,3-cyclohexanebis (methylamine), polyethyleneamine, ethylene glycol, diethylene glycol, triethylene glycol, 1,4-butanediol, 1,6-hexanetriol, glycerin, trimethylolpropane, etc. Various low molecular weight multifunctional hydroxy or amine compounds are used.

As shown in Tables 1 and 2 below, it consists of a prepolymer DP5DP containing an isocyanate group and a DP5DR containing a hydroxyl group. ) Will be formed outside the core 2 to produce the conveyor board (1).

<Table 1> DP5DP (P: Prepolymer)

ingredient

Molecular Weight
Input amount (% by weight)
4, 4'-diphenylmethine diisocyanate

200-300
60-70
Polypropylene glycol

4,000 ~ 5,000
8-15
Polyethylene phthalate diol

2,000-3,000
20-30

TABLE 2 DP5DR (R: Polyol)

ingredient

Molecular Weight
Input amount (% by weight)
Polyethylene adipate diol

1,500-2,000
70-80
1.4-butanediol

90.00-90.50
10-20
Ethylene glycol

60.07-60.40
7-15
catalyst

0.15-0.5
Silicone Addictive

One

The mixing ratio of the prepolymer and the polyol is polyol 40 to 80 in 100 wt% of the prepolymer, and a demolding time is 5 minutes or more. Hardness of the molded skin 3 is D40-70 in shore hardness.

Since the automatic reaction of the polyurethane stock solution composed of the composition is an exothermic reaction, the temperature of 40-100 ° C. in the mold 4 is maintained so that the energy required for the reaction is not consumed in an external environment. Failure to adjust the temperature of the mold 4 during the molding process results in poor molding and deterioration of the properties of the polyurethane.

As mentioned above, when coloration of the skin 3 is required, the pigment is put into the dye tank in the automatic molding machine and then discharged when the mold is cast. If necessary, vacuum degassing may be performed to remove bubbles in the polyurethane stock solution.

And since the prepolymer may be solidified at room temperature, it maintains the temperature of 40 ~ 80 to improve the flowability.

In addition, during molding, the mold 4 is 100% completely filled with the polyurethane stock solution into the cavity of the mold 4 in the mold closed state to perform non-foaming molding and demolding.

The reaction rate is controlled as a catalyst to have various demolding times.

After the ideal reaction is completed, the hardness of Shore 90A or more or D40 or more can be obtained after demolding, but after 1 day of natural curing at room temperature, the conveyor board 1 of desired properties can be obtained.

1 is a configuration example of a conveyor board according to the present invention

Figure 2 is a schematic diagram showing a molding state of the conveyor board according to the manufacturing method of the present invention

Figure 3 is another embodiment of the present invention

<Description of Symbols Used in Main Parts of Drawings>

1: conveyor board 2: heartwood

2a. Framework 2b. Filling

3: cuticle 4: mold

Claims (5)

In the manufacturing method of the conveyor board (1) used for the automation line; The conveyor board 1 is selected from non-ferrous, high-pressure laminated plate, compressed wood (Compressed wood), a resin material board (Polymer Material board), glass fiber (glass fiber) to create a core material 2 to the desired dimensions ( 2); Injecting the core material (2) into a mold (4) heated, dried, and having a release agent applied thereto so that the skin portion (3) is coated and molded on the exterior of the core material (2); Mixing the prepolymer DP5DP containing an isocyanate group and the DP5DR containing a hydroxyl group on an auto molder for forming the skin portion 3; Filling the mixed DP5D stock solution with the mold 4 cavity to mold the skin 3; Demolding the conveyor board after the molding process is completed in the mold; Method for producing a conveyor board, characterized in that consisting of. The method of claim 1, further comprising: The prepolymer DP5DP is a manufacturing method of a conveyor board, characterized in that consisting of 60 to 70% by weight of 4, 4'-diphenylmethine diisocyanate, 8 to 15% by weight of polypropylene glycol, 20 to 30% by weight of polyethylene phthalate diol. The method of claim 1, further comprising: The polyol DP5DR is a conveyor comprising 70 to 80 wt% polyethylene adipate diol, 10 to 20 wt% 1.4-butanediol, 17 to 15 wt% ethylene glycol, 0.15 to 0.5 wt% catalyst, and 1 wt% silicone additive. How to make a board. The method of claim 1, Forming the skin portion is a method of manufacturing a conveyor board, characterized in that the molding without foaming Conveyor board, characterized in that produced by the method of claim 1

Images