JP2008290252A - Insulating resin injector, injection nozzle and nozzle connector - Google Patents

Abstract

An injection nozzle that hardly clogs a heat insulating resin, a heat insulating resin injection machine provided with the injection nozzle, and an injection nozzle connector used for attaching the injection nozzle to a heat insulating resin injection machine main body are provided.
SOLUTION: A collar 4b whose root is fixed to the case at a position close to the discharge port 2d1 of the mixed liquid of the case 2 housing the stirring rotor for mixing the two liquids of the mixing head, and a discharge port of the case A passage for the mixed liquid from the receiving port for receiving the two mixed liquids flowing out to the discharge port is formed, and a pipe and an integral pipe 5 are provided, and at least the pipe is made of synthetic resin.
[Selection] Figure 1

Description

  In order to make an aluminum sash into a heat-insulated structure, the present invention injects resin into a sash bar, an injection nozzle provided in the heat-insulating resin injector, and an injection nozzle connection for connecting the injection nozzle to the heat-insulating resin injector Concerning ingredients.

  Conventionally, a polyurethane resin produced by mixing two liquids has been widely used in the manufacture of heat insulating sashes because it can select a type having a short curing time, has heat insulating properties, and has excellent mechanical strength. The heat insulating resin injection machine is, for example, a means for mixing polyether polyol (A liquid) and polymeric MDI (B liquid), a means for pushing out the mixed two liquids, an injection nozzle for guiding the two liquids to be extruded to a sash bar, and an injection A nozzle coupling fitting for coupling the nozzle to the heat insulating resin injector. Then, the sash bar is placed sideways, and the heat insulating resin injecting machine is fed along the sash bar to inject the heat insulating resin into the sash bar. Alternatively, the heat insulating resin injection machine is fixed and the sash bar is fed in the longitudinal direction to inject the heat insulating resin into the sash bar.

  FIG. 8 is a longitudinal sectional view of a conventional injection nozzle. In the figure, a nipple 26 for pressurizing a packing 23 is screwed into a case 22 that accommodates a stirring rotor. The upper end of the injection nozzle 24 is fitted in the hole 26 a of the nipple 26. The flange 25 closely fitted to the outer periphery of the injection nozzle 24 is fastened by a cap nut 27 screwed into the nipple 26.

  The injection nozzle 24 is made of copper, and the upper part has a hollow cylindrical shape, and the lower part has an oval cross section, and the cross section gradually changes from the hollow cylindrical shape toward the lower side than the intermediate part, and the cross section is rectangular.

Such heat-insulating resin is injected at a low pressure. The injection nozzle is clogged with polyurethane. Wash the injection nozzle filled with polyurethane. Conventionally, methylene chloride has been used as a cleaning agent for injection nozzles. Copper nozzles are used because of their resistance to methylene chloride.
JP 2000-25055 A 5-93564

  When using a copper injection nozzle, the injection nozzle gradually clogs with the injection time. Therefore, in order to remove the polyurethane resin from the injection nozzle, the injection nozzle is removed from the heat insulating resin injection machine and washed with methylene chloride. Since the polyurethane resin is easily clogged in the injection nozzle and cannot be completely washed, it took a lot of time to replace the injection nozzle and remove the resin. In addition, due to environmental considerations, by completely eliminating methylene chloride as a cleaning agent and replacing it with a cyclic ester, the cleaning performance is reduced, and more and more time is required for replacement of the injection nozzle and removal of the resin.

  This invention solves the said subject, and provides the injection nozzle coupling tool used for attaching the injection nozzle which is hard to clog a heat insulation resin, the heat insulation resin injection machine provided with this injection nozzle, and the injection nozzle to the heat insulation resin injection machine main body. Objective.

  A two-component mixed polyurethane resin has a short time until the two components are mixed and cured. An exothermic reaction occurs until the two liquids are mixed and cured. Therefore, the temperature is low on the base side of the injection nozzle, and the temperature rises as it goes to the tip of the injection nozzle. On the other hand, according to the copper injection nozzle, the copper injection nozzle is heated by the resin passing through the copper injection nozzle. The copper injection nozzle stores heat, although heat is released from the outer periphery. And as the temperature of the heat insulating resin passing there increases as the copper injection nozzle goes to the tip, the temperature becomes higher. Copper has a large heat transfer from the heat-insulating resin and a high heat conduction at the injection nozzle. Therefore, the tip of the copper injection nozzle has a high temperature and conducts heat toward the base side, and heats the heat insulating resin passing therethrough on the base side of the copper injection nozzle. Therefore, the heat insulating resin is hardened at the tip side of the injection nozzle. Even if heat insulation resin adheres to some copper injection nozzles, heat transfer from the tip side of the copper injection nozzles causes the heat insulation resin to continue to adhere and gradually clog.

  The present invention inferred that the mechanism by which the heat insulating resin is plugged into the copper injection nozzle is as described above, and has sought the means for solving the problem.

The first invention according to the present application is an injection nozzle that mixes with a mixing head and injects into a heat insulating part of a sash bar by mixing two liquids that are cured by mixing and become a hard polyurethane resin.
The collar that is fixed to the case at a position close to the two-liquid mixture outlet of the case containing the stirring rotor that mixes the two liquids of the mixing head, and the mixed two-liquid flowing out from the case outlet are received. An injection nozzle characterized in that a flange and an integral pipe that constitute a passage of the mixed liquid from the receiving port to the discharge port are provided, and at least the pipe is made of synthetic resin.

  According to a second aspect of the present invention, the base side that receives the liquid mixture from the discharge port of the case and the tip side with the discharge port are separate members, and the tip side injection nozzle can be inserted into and removed from the base side injection nozzle. An injection nozzle according to the first aspect of the invention, wherein the injection nozzle is attached to the nozzle.

  A third invention according to the present application is the injection nozzle according to the second invention, characterized in that the material of the injection nozzle on the base side is fluororesin and the material of the injection nozzle on the tip side is polyethylene resin.

4th invention which concerns on this application is an injection nozzle which inject | pours into the heat insulation part of a sash bar the liquid mixture which hardened | mixed by mixing and became the hard polyurethane resin with the mixing head, and is a synthetic resin which has a collar at the upper end In the injection nozzle connector for attaching the injection nozzle of the hollow pipe made of the pipe to the mixing head,
A mixing chamber for storing the stirring rotor of the mixing head, a discharge port for the mixed liquid at the bottom of the mixing chamber, and a cylindrical sealing portion hole whose diameter is larger than the discharge port immediately below the discharge port and below the sealing portion hole A case having an injection nozzle mounting portion having a female thread;
A packing having a hole that closely fits into a cylindrical sealing portion hole and that continues to the discharge port in the center;
Engage the fastening tool with a through hole into which the neck of the collar of the injection nozzle is closely fitted, an upper end surface that presses the collar of the injection nozzle toward the packing, a male screw that is screwed into the female screw of the case, and A fitting having a tool handle for being provided with rotation;
An injection nozzle connector characterized by comprising:

According to a fifth aspect of the present invention, there is provided a heat insulating resin injecting machine in which two liquids that are cured by mixing and mixed into a hard polyurethane resin are mixed with a mixing head and injected into a heat insulating portion of a sash bar through an injection nozzle and cured.
A tank that stores one of the two liquids, and a piping device that connects the tank and the mixing head;
The tank that stores the other one of the two liquids and a piping device that connects the tank and the mixing head;
A mixing head having a stirring rotor for mixing two liquids;
A case that houses the agitation rotor and is detachably attached to the mixing head;
A resin injection nozzle whose root starts and hangs down near the discharge port of the two liquid mixture at the bottom of the case,
A nozzle connector for fixing the base side of the injection nozzle to the case;
It is the heat insulation resin injection machine characterized by having.

According to the first aspect of the invention, the adhesion of polyurethane resin to the injection nozzle is extremely reduced, and the cleaning time, the number of cleanings, and the number of replacements of the injection nozzle are reduced (for example, nine sash bars having a length of 6 m). Washing was performed once for the heat insulating resin injection into the heat insulating resin injection into 50 sash bars). Therefore, productivity has increased significantly. Moreover, since the injection nozzle is made of synthetic resin, the price of the injection nozzle is reduced. Also, since the injection nozzle has a collar at one end and the collar is fixed, the pipe portion expands and contracts in the longitudinal direction with respect to temperature change, but the cross-sectional shape does not change.

  According to the second aspect of the present invention, since the tip side of the injection nozzle in which the mixed solution is solid and adheres predominantly can be inserted into and removed from the root side injection nozzle, the tip side injection nozzle can be replaced. The operation time was short, and the operating rate of the heat insulating resin injection machine using this injection nozzle could be increased.

  According to the third aspect of the present invention, since the base side injection nozzle is made of fluororesin, the liquid mixture is less likely to adhere and solidify on the base side injection nozzle. Since the injection nozzle on the tip side is made of polyethylene resin, the injection nozzle on the tip side needs to be replaced more frequently than the injection nozzle on the root side, and thus the cost can be further reduced. Moreover, since it can shape | mold easily, the injection | pouring nozzle of the front end side can be made into a desired cross section.

  According to the invention which concerns on Claim 4, since the neck of the injection | pouring nozzle is a through-hole which fits closely, the material of the resin of an injection | pouring nozzle can be selected from a soft thing and an elastic thing. The injection nozzle can be attached or detached simply by inserting the injection nozzle into the through hole of the joint and screwing the male screw into the female screw of the case. Even if a soft resin or an elastic resin is used as the material of the injection nozzle, the cross-sectional shape of the portion fitted in the through hole of the injection nozzle can be well maintained.

  According to the invention of claim 5, since the resin injection nozzle is provided, the cleaning frequency of the injection nozzle is reduced, the time required for removing and attaching the injection nozzle is shortened, and the operation rate of the heat insulating resin injection machine is improved. did.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a longitudinal sectional view of a nozzle connector provided with an injection nozzle, FIG. 2 is a view of a heat insulating resin injection machine shown by a flow sheet, FIG. 3 is a plan view of the injection nozzle, and FIG. 5 is a cross-sectional view taken along line BB in FIG. 1, FIG. 6 is a cross-sectional view taken along line CC in FIG. 1, and FIG. 7 is a cross-sectional view taken along line DD in FIG.

  As shown in FIG. 1, a packing 3, injection nozzles 4, 5 and a pipe joint 6 are attached to a case 2 detachably provided on the mixing head 1 shown in FIG. 2.

  The case 2 includes a mixing chamber 2a in which a stirring rotor 9 (see FIG. 2) that rotates on a vertical axis provided in the mixing head 1 is fitted with a small gap, and a cylindrical fitting portion 2b that is fitted into the mixing head 1 for alignment. And a flange 2c fastened by fastening means (not shown) in contact with the mixing head 1 and a step hole 2d for attaching injection nozzles 4 and 5 penetrating downward from the center of the bottom of the mixing chamber 2a. The step hole 2d has a discharge port 2d1 having the same diameter as the inner diameter of the nozzle 4, and a sealing portion hole 2d2 expanded in diameter from the discharge port 2d1. A female screw 2d3 having an inner diameter equal to or slightly larger than the sealing portion hole 2d2 is cut under the sealing portion hole 2d2.

  Here, the sealing portion hole 2d2 and the female screw 2d3 are injection nozzle mounting portions.

  The mixing chamber 2a includes a conical portion 2a2 below the cylindrical portion 2a1 whose center line is in the vertical direction. The fitting portion 2b is concentric with the cylindrical portion 2a1 and has a short cylindrical shape in the vertical direction, and is located at the uppermost portion of the case 2. The flange 2c is positioned following the fitting portion 2b, and is attached to the mixing head 1 with a bolt using a hole (not shown) penetrating the flange 2c, or using a flange pressing metal fitting (not shown). Is attached to the mixing head 1.

  A ring-shaped packing 3 is closely fitted in the sealing portion hole 2d2 of the case 2. The packing 3 is in contact with a circular collar 4b provided integrally with the upper portion of the cylindrical hollow cylinder 4a of the injection nozzle 4. The collar 4b may be provided integrally on the upper part of a short tube fitted to the inner periphery or outer periphery of the tube 4a and fixed by heat melting or an adhesive (not shown). The upper end surface of the pipe joint 6 screwed into the female screw 2d3 presses the collar 4b toward the packing 3. The pipe joint 6 has a through-hole 6c at the center thereof into which the portion directly below the cylindrical injection nozzle 4 is closely fitted. The outer periphery of the pipe joint 6 is provided with hexagonal portions 6a and 6b for spanning. Here, the pipe joint 6 is an injection nozzle fitting. The pipe joint 6 in FIG. 1 is represented by cutting the front side of the portion of the injection nozzle 4 when viewed from the plane of FIG. 1, and the portion excluding the injection nozzle 4 represents the outer periphery of the pipe joint 6.

  4 is a cross-sectional view taken along the line AA in FIG. The injection nozzle 4 has a hollow cylindrical shape over its entire length as shown in a cross section in FIG. The outer diameter of the injection nozzle 4 is 8 millimeters and the inner diameter is 6 millimeters. The upper end of the injection nozzle 4 is a receiving port for the liquid mixture of the liquid A and the liquid B that are press-fitted through the discharge port 2d1.

  5 is a cross-sectional view taken along line BB in FIG. As shown in FIG. 5, the injection nozzle 5 has a hollow cylindrical shape as shown in FIG. 5, and the inner periphery of the injection nozzle 5 is lightly press-fitted into the outer periphery of the injection nozzle 4. That is, the injection nozzle 5 can be inserted into and removed from the injection nozzle 4 by hand. The inner diameter of the upper part 5a of the injection nozzle 5 is 8 millimeters, and the outer diameter is 10 millimeters. The injection nozzles 4 and 5 constitute a mixed liquid passage of the liquid A and the liquid B.

  6 is a cross-sectional view taken along the line CC of FIG. As shown in FIG. 6, the intermediate part 5b of the injection nozzle 5 is a flat oval hollow cylinder. The intermediate portion 5b is flattened by heating and pressing except for the upper portion 5a up to the tip portion 5c. The injection nozzle 5 between the BB cross section of FIG. 1 and the CC cross section of the same figure gradually increases in flatness from the hollow cylindrical shape. The intermediate portion 5b has the highest degree of flatness. 7 is a cross-sectional view taken along the line DD of FIG. The tip portion 5c of the injection nozzle 5 is the same as the cross section of the intermediate portion 5b. The intermediate section 5b and the tip 5c have the same cross section.

  The injection nozzle 5 was manufactured by inserting the inner periphery of a cylindrical resin tube into an iron flat bar having a thickness of 2 mm and a width of 12 mm, and heating and pressurizing the tip of the tube to make it thin.

  In the above, the upper injection nozzle 4 is made of, for example, fluorine resin, and the lower injection nozzle 5 is made of, for example, polyethylene resin. As the injection nozzles 4 and 5, for example, polyethylene (PE), polypropylene (PP), polystyrene (PS), AS resin, ABS resin, polyvinyl chloride (PVC), polyacetal (POM), polyfluorinated ethylene (PTFE), poly Any of ethylene propylene fluoride (FEP), perfluoroalkoxy fluoride plastic (PFA), polyvinylidene fluoride (PVDF), and the like can be used.

  As shown in FIG. 2, the resin is injected into the sash bar 11 from the tank 7 storing the A liquid (polyether polyol) and the tank 8 storing the B liquid (polymeric MDI) to the mixing head 1 through the piping devices 14 and 15, respectively. Liquid and B liquid are fed. Although not shown, the piping devices 14 and 15 are provided with a stop valve, a filter, a pump, and a pressure gauge. In the mixing head 1, the stirring rotor 9 rotates and the A liquid and the B liquid are mixed in the case 2. The mixture immediately starts to react and generates heat. The temperature of the mixed solution due to the heat generation is 60 to 70 ° C. with the mixed solution passing through the injection nozzles 4 and 5. Then, it is injected into the groove 11 a of the sash bar 11 through the discharge port 2 d 1 of the case 2, the hole 3 a of the packing 3, the first injection nozzle 4, and the second injection nozzle 5. Since the aluminum sash bar 11 or the mixing head 1 is fed in a direction perpendicular to the paper surface of FIG. 2, a heat insulating resin 12 of polyurethane resin is generated over almost the entire length of the groove 11a of the sash bar 11. After the heat insulating resin 12 is cured, the bottom member 11b of the groove 11a is removed by cutting.

  Cleaning of the mixing head 1 is performed by flowing the solvent in the solvent tank 13 containing the cleaning agent to the mixing head 1.

  In addition to the above, when the injection nozzles 4 and 5 were clogged, they were cleaned using a cyclic ester (trade name, for example, Chemiclean) as a cleaning liquid.

The data of Examples and Comparative Examples are shown below.
[Data of this example]
The injection nozzle 4 is made of fluorine resin, and the injection nozzle 5 is made of polyethylene resin.

  The operation of injecting the heat insulating resin was performed by injecting the mixed solution into the groove 11a of the sash bar 11 having a length of 6 m by continuously sending a plurality of sash bars 11. According to this embodiment, it was possible to inject the mixed liquid serving as the heat insulating resin 12 into 1150 sash bars without washing the injection nozzles 4 and 5. The half-cured resin clogged in the injection nozzle 5 is washed and removed every 50 sash bars 11. The clogged resin can be removed without putting the injection nozzle 5 in the cleaning liquid. For this reason, the time required for cleaning the injection nozzle 5 by washing was reduced (cleaning time approximately 10 minutes per day). The cleaning liquid to be deposited when cleaning the injection nozzle 5 was cleaned twice at 150 g per day with a single cleaning, so the daily usage of the cleaning liquid is 300 g.

The injection nozzle 4 on the root side was not clogged with the mixed liquid that became the heat insulating resin.
[Comparative data]
The injection nozzle has a base of 10 mm in outer diameter and an inner diameter of 8 mm, and the tip is a copper integrated body having substantially the same shape and dimensions as the embodiment. The cross section of the sash bar to be injected, the length, and the mixed liquid serving as the heat insulating resin to be injected are the same as in the example.

  In the conventional example, the following results were obtained.

  When a heat insulating resin was continuously injected into the sash bar 11 similar to the practical example using a copper nozzle, the injection nozzle was clogged with 9 or less sash bars. Therefore, the injection nozzle is washed once. The injection nozzle was exchanged by injecting a mixed liquid serving as a heat insulating resin into 20 sash bars.

  In order to remove the resin clogged in the injection nozzle, it was left in the cyclic ester and then cleaned (cleaning time about 60 minutes per day).

The portion corresponding to the injection nozzle 4 was a central hole of a cylindrical copper tube or a connecting metal fitting, but it was made of copper and the liquid mixture serving as a heat insulating resin was easily clogged.

  * Comparison of costs was 1/6 in this example compared to Comparative Example 6 and was about 1/6. The comparison was made only with the amount of cleaning agent used and the cleaning time of the injection nozzle. In addition to the above, the injection nozzle price is made of copper in the comparative example, this example is made of synthetic resin, and this example is much cheaper. Further, in this embodiment, the amount of cleaning liquid used is about one-sixth that of the comparative example, and the waste liquid after cleaning is also less in this embodiment, so that the waste liquid processing cost is also reduced.

  From the above points, according to the injection nozzles 4 and 5 of the example, the adhesion of the polyurethane resin to the injection nozzles 4 and 5 was extremely reduced, and the cleaning time, the number of cleanings, and the number of replacements of the injection nozzle were reduced. Therefore, productivity has increased remarkably. The price of the injection nozzle decreased because the injection nozzle was changed from copper to synthetic resin.

When the injection nozzle 4 is made of a fluororesin, the thermal expansion coefficient is 8.3 to 12 (10 ⁻³ / ° C.). The injection nozzle 4 has a collar 4b at the upper end, and the collar 4b is clamped and attached by the packing 3 and the pipe joint 6. Therefore, even if the pipe 4a portion expands and contracts in the longitudinal direction, no compressive stress is produced and the cross-sectional shape is Well kept without change.

  The injection nozzle 5 is simply inserted into the outer periphery of the injection nozzle 4, so that the injection nozzle 5 can be easily attached to and detached from the injection nozzle 4. Therefore, the injection nozzle 5 can be attached and detached in a short time.

  Usually, the case 2 remains attached to the mixing head 1, and the injection nozzle 4 is attached to the mixing head 1 by inserting the injection nozzle 4 into the injection nozzle attachment 6, and then the injection nozzle attachment 6 is attached to the step hole of the case 2. Since it is only screwed into the 2d female screw 2d3, the mounting is simple.

It is a longitudinal cross-sectional view of the Example of this invention. It is a flow sheet of a heat insulation resin injection machine. It is a top view of an injection nozzle. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is DD sectional drawing of FIG. It is a longitudinal cross-sectional view of a prior art example.

Explanation of symbols

1 ... Mixing head
2 ... Case 2a ... Mixing chamber 2a1 ... Cylinder part 2a2 ... Conical part 2b ... Fitting part 2c ... Flange 2d ... Step hole 2d1 ... Discharge port 2d2 ... Sealing part hole 2d3 ... Female screw 3 ... Packing 3a ... Hole 4 ... Injection nozzle 5 ... Injection nozzle 5a ... Upper part 5b ... Intermediate part 5c ... Tip part 6 ... Pipe joint 6a, 6b ... Hexagonal part 6c ... Through hole 7 ... A liquid tank 8 ... B liquid tank 9 ... Stirring rotor 11 ... Sash bar 11a ... Strip groove 11b ... Bottom member 12 ... Insulating resin 13 ... Solvent tank 14, 15 ... Piping device 22 ... Case 23 ... Packing 24 ... Copper injection nozzle 25 ... Top 26 ... Nipple 26a ... Hole 27 ... Cap nut

Claims (5)

In the injection nozzle that mixes with a mixing head and injects into the heat insulating part of the sash bar by mixing the two liquids that harden by mixing and become a hard polyurethane resin,
The collar that is fixed to the case at a position close to the two-liquid mixture outlet of the case containing the stirring rotor that mixes the two liquids of the mixing head, and the mixed two-liquid flowing out from the case outlet are received. An injection nozzle comprising a collar and an integral or integral pipe constituting a passage of the mixed liquid from the receiving port to the discharge port, and at least the pipe is made of synthetic resin. The base side of the injection nozzle that receives the liquid mixture from the discharge port of the case and the tip side with the discharge port are separate members, and the tip side injection nozzle is removably attached to the base side injection nozzle. The injection nozzle according to claim 1, wherein The injection nozzle according to claim 2, wherein the material of the injection nozzle on the base side is made of fluororesin, and the material of the injection nozzle on the tip side is made of polyethylene resin. Mixing the injection nozzle of a hollow tube made of synthetic resin that has a flange at the upper end, which is an injection nozzle that injects the mixed liquid, which is hardened by mixing and becomes a hard polyurethane resin, with the mixing head, into the heat insulating part of the sash bar In the injection nozzle connector attached to the head,
A mixing chamber for storing the stirring rotor of the mixing head, a discharge port for the mixed liquid at the bottom of the mixing chamber, and a cylindrical sealing portion hole whose diameter is larger than the discharge port immediately below the discharge port and below the sealing portion hole A case having an injection nozzle mounting portion having a female thread;
A packing having a hole that closely fits into a cylindrical sealing portion hole and that continues to the discharge port in the center;
Engage the fastening tool with a through hole into which the neck of the collar of the injection nozzle is closely fitted, an upper end surface that presses the collar of the injection nozzle toward the packing, a male screw that is screwed into the female screw of the case, and A fitting having a tool handle for being provided with rotation;
An injection nozzle connector characterized by comprising: In a heat insulating resin injection machine that mixes two liquids that are hardened by mixing and become a hard polyurethane resin with a mixing head and injects it into the heat insulating part of the sash bar through an injection nozzle and cures,
A tank that stores one of the two liquids, and a piping device that connects the tank and the mixing head;
A tank storing the other one of the two liquids and a piping device connecting the tank and the mixing head;
A mixing head having a stirring rotor for mixing two liquids;
A case that houses the agitation rotor and is detachably attached to the mixing head;
A resin injection nozzle whose root starts and hangs down near the discharge port of the two liquid mixture at the bottom of the case,
A nozzle connector for fixing the base side of the injection nozzle to the case;
A heat insulating resin injection machine characterized by comprising:

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