JP2006001186A - Pultrusion device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pultrusion device for obtaining a molded object which has sufficient strength equal to that of a molded FRP object and can be safely disposed of by combustion when the molded object is discarded. <P>SOLUTION: This pultrusion device is equipped with a hopper 1 into which a molding material (a) obtained by mixing dicyclopentadiene with ruthenium, a slender molding tool 2 extending almost horizontally from the lower part of the hopper 1 and a drawing device 3 which draws the molded object discharged from the molding tool 2. In addition, the hopper 1 has a cooling means 7 for cooling the hopper 1 below normal temperatures and the molding tool 2 has a heating means 11. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a pultrusion molding apparatus that draws a molded product by passing a liquid material through a molding die while controlling the temperature and curing the material.

  In general, in sewage treatment plants and water purification plants, in order to purify wastewater discharged from households, impurities are precipitated to form sludge, and this sludge is accumulated in a pit. As a measure for this, there is known a system in which a scraping material having a U-shaped cross section is moved at a certain interval along a rail following the pit, and sludge is scraped by the scraping material and sequentially sent to the pit. As the scraping material, a material made of FRP (fiber reinforced plastic) is often used.

  However, since the scraping material made of FRP contains glass fiber, it cannot be burned even if it is disposed of. It must be buried underground as industrial waste. Therefore, there is a problem that the disposal is easy and the environment is not good.

As an improvement measure, it was considered to use metal or other synthetic resin for the scraping material, but in the case of metal, although the strength is sufficient, the weight is heavy and the scraping material is moved when scraping the sludge. There is a problem that the output of the drive source must be increased, resulting in high costs. In the case of a synthetic resin that does not reinforce, there is a fatal defect of low strength, and it must be able to be combusted and the condition that the cost is not high must be satisfied.
JP 2003-205207 A

  The present invention eliminates the above problems and is a pultrusion molding for obtaining a molded product having sufficient strength equivalent to that of an FRP molded product and can be safely burned and processed when disposed of. The device is the subject.

  In order to solve the above-described problems, a pultrusion molding apparatus according to the present invention includes a hopper for feeding a molding material in which dicyclopentadiene and ruthenium are mixed, an elongated molding die extending in a substantially horizontal direction from the lower portion of the hopper, and And a drawing device for drawing out a molded product discharged from the molding die, wherein the hopper is provided with a cooling means for cooling to a room temperature or lower, and the molding die is provided with a heating means.

  According to the first aspect of the present invention, since the molding material is liquid like water and the molding material naturally flows through the molding die, it is not necessary to provide special means for extruding the molding material. . However, since the molding material is cured at room temperature, the liquid state can be maintained in the hopper. Further, since the molding material is cured and molded in the molding die by applying heat, the molded product can be smoothly and reliably pulled out from the molding die.

  And the molded product shape | molded with the said shaping | molding method has sufficient intensity | strength comparable as the molded product made from FRP, and can be safely burned and processed when it is disposed of.

  By molding a molding material mainly composed of dicyclopentadiene under appropriate temperature control, the present invention has sufficient strength equivalent to that of a molded product made of FRP, and is safe when discarded. We realized a molding method for molded products that can be burned and processed.

  FIG. 1 shows a molding apparatus according to the present invention. This molding apparatus has a hopper 1 for charging molding material, and a molding die 2 for curing the molding material into a predetermined cross-sectional shape. And a drawing device 3 for drawing a molded product having a U-shaped cross section from the molding die 2.

  As shown in FIG. 2, one end of the hopper 1 opens upward, the other end opens to the lower side, and the molding material a is charged from the upper opening 4 and discharged from the side opening 5. It is configured. The hopper 1 is provided with a cooling means for cooling to room temperature or lower, and the molding die 2 is provided with a heating means.

  As the molding material a, metacene in which dicyclopentadiene and ruthenium are mixed at a certain ratio is used.

  Although metacene a is in a liquid state, it cures at room temperature, so that the hopper 1 is provided with a cooling means 7 so as not to be cured in the hopper 1. The cooling means 7 is constituted by a refrigerant passing through a passage 6 formed inside the periphery of the hopper 1. As the refrigerant, tap water cooled to room temperature or lower may be used.

  In addition, the cooling means 7 should just prevent the molding material a in the hopper 1 from hardening | curing, and is not limited to the structure shown by the figure.

  Next, the molding die 2 is formed in an elongated shape from the lower die 2 a and the upper die 2 b and is disposed on the support frame 8. The lower die 2a has a concave cross section, the upper die 2b has a convex cross section, and an upward U-shaped molding space 9 is formed between the upper die 2b and the lower die 2a. A flange 10 is formed at one end of the lower mold 2 a, and the flange 10 is abutted and fixed to the peripheral edge of the side opening of the hopper 1. The upper mold 2b is placed and fixed on the lower mold 2a. The flange 10 side is the introduction side of the molding material a, and the opposite side is the discharge side of the molding material a.

  The molding die 2 is provided with heating means 11. When a sheathed heater is used as the heating means 11, as shown in FIG. 3, many heater insertion holes 12 for inserting a large number of heaters in the longitudinal direction of the molding die 2 are formed. The heater insertion holes 12a on the side surface are formed upward from the lower end, and the heater insertion holes 12b on the bottom surface are alternately formed on the left and right. A temperature measuring means is provided together with the heating means 11 by a thermocouple or the like.

  The heating means 11 is not necessarily limited to a rod heater such as a sheathed heater. Other heating means such as a planar heater may be used.

  The pulling device 3 is provided with a pair of upper and lower pinch rollers 13 on the device main body 3a, and these pinch rollers 12 are driven by a motor. The pinch roller 13 is formed inside the molding die 2. It is arranged on the extension of the U-shaped molding space 9.

  Next, when molding is performed by the pultrusion molding apparatus having the above-described configuration, the molding material a is filled into the hopper 1 while the hopper 1 is cooled by the cooling means 7. As shown in FIG. 2, since the molding material a is in a liquid state, it naturally flows into the molding die 2 by gravity. Since the temperature of the molding die 2 is increased by the heating means 11, the molding material a in the molding die 2 is gradually cured, and is cured to the extent that the molded state is substantially maintained in the vicinity of the discharge port 14. Therefore, the pulling device 3 is operated, the upward U-shaped molded product 5 is sandwiched between the pinch rollers 13, and the pinch roller 13 is rotated and pulled out little by little. As a result, the metacene a, which is liquid in the hopper 1, cures while passing through the molding die 2 and is drawn out as a molded product 15.

  Although this invention demonstrated the apparatus which manufactures the molded article of a cross-sectional U shape, it is not limited to such an example. Any product that can be produced by normal pultrusion can be molded. Of course, it can be applied not only to scraping materials of sewage treatment plants and water purification plants, but also to various uses.

1 is a perspective view of a pultrusion apparatus according to the present invention. It is a longitudinal cross-sectional view of the said pultrusion apparatus. It is a bottom view of the lower mold | type of a shaping die.

Explanation of symbols

a molding material 1 hopper 2 molding die 3 drawing device 7 cooling means 11 heating means

Claims (1)

A hopper for charging a molding material mixed with dicyclopentadiene and ruthenium, an elongated molding die extending in a substantially horizontal direction from the lower portion of the hopper, and a drawing device for pulling out the molded product discharged from the molding die. A pultrusion molding apparatus, wherein the hopper is provided with cooling means for cooling to room temperature or lower, and the molding die is provided with heating means.

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