JP5009340B2 - How to place a model material overlay - Google Patents

Description

  The present invention relates to a method for placing a model material placement agent. Specifically, when placing a placement agent made of various resins on a core material that has been roughly shaped in advance, a placement method using a die whose opening shape of the discharge mouth of the two-liquid dispenser is a trapezoidal shape About.

Conventionally, as a manufacturing method of an industrial model for confirming a design, for example, a full-scale design model of an automobile (these are referred to as models in the present invention), (1) cutting after bonding synthetic wood with an adhesive (2) On the core material that has been roughly shaped in advance, a placement agent composed of a two-component curable urethane resin or an epoxy resin is mixed with a mixer to add 2 to the surface of the core material. While discharging from the liquid discharger or pressing by hand, after placing on the surface of the core material, it is cured to make a model material, and then the obtained model material is cut and the surface is painted if necessary There is known a method for obtaining a model of the shape (hereinafter abbreviated as a laying method).
Among the methods of (2), for example, methods disclosed in Patent Documents 1 to 3 are known as a method of placing a placement agent while discharging it from a two-liquid dispenser.

US Pat. No. 3,861,936 Japanese Patent No. 3734783 JP 2005-240017 A

  However, in a large model such as a full-scale model of an automobile, the conventional placement method has few contact surfaces between the existing placement agent 2 and the core material 1 and the new placement agent 3 as shown in FIG. 4 was easy. For example, when the surface is cut at the cutting position 5 and then painted, the dents and cracks are often generated on the painted surface.

  The inventor of the present invention has arrived at the present invention as a result of intensive studies to solve the above problems. That is, the present invention is a method of mixing and discharging a model material placement agent by a two-liquid discharger and placing it on a core material, wherein the opening of the discharge base of the two-liquid discharger has a trapezoidal shape, and the trapezoidal shape. A placing method characterized in that the long side of the material is placed in contact with the core material while being in contact with the core material; a method for producing a model material characterized in that a placing agent is placed by the placing method and then cured; And a model obtained by further cutting and painting the model material.

  When a model material is manufactured by the placement method of the present invention, it is difficult to form a gap between the existing placement agent 6, the core material 1 and the new placement agent 7, as shown in FIG. Even if the model is painted, there is an effect that it is possible to manufacture a model that does not cause dents or cracks on the painted surface.

The discharge nozzle of the two-liquid discharger that mixes and discharges the overlaying agent in the present invention has a trapezoidal opening, and deposits the overlaying agent while making the long side of the trapezoidal shape contact the core material. The trapezoidal shape is preferably such that the length of the upper base of the inner surface of the discharge cap is 80 to 95% of the length of the lower base. If the length of the upper base exceeds 95% of the length of the lower base, the discharged placement agent becomes barrel-shaped as shown in FIG. 1 due to the discharge pressure, so that the existing placement agent 2 is ahead of the core material side. The gap 4 tends to be formed between the core material 1 and the existing placement agent 2 and the new placement agent 3 in the vicinity of the central portion in the height direction. If the length of the upper base is 80% or less of the length of the lower base, there will be a large gap between the rows of the tops on the top surface. It is easy to create a gap in the surface. In the discharge cap according to the present invention, as shown in FIG. 2, since the new placement agent 7 is in contact with the existing placement agent 6 from the core material side, there are few gaps between the rows.

  As shown in FIG. 3, the discharge cap in the present invention is preferably provided with a parallel portion 10 having the same shape as the trapezoidal opening. If the shape does not have 10 portions, it is difficult to discharge the placement agent in a preferable shape.

  As shown in FIG. 4, the opening of the discharge cap in the present invention is provided with a rectangular notch 12 having one side of the length (b) of the lower base of the trapezoidal shape at the end on the lower base side. Shape is preferred. By providing the notch 12, the discharged depositing agent and the core material are in good contact. The ratio of the short side length (c) to the long side length (b) of the rectangular cutout is preferably 0.02 to 0.3. When (c) / (b) is 0.02 or more, the adhesion effect between the placement agent and the core material is easily obtained, and when it is 0.3 or less, the placement agent is easily discharged in a preferable form. The short side length (c) is preferably 3 to 20 mm. When the length (c) of the short side is 3 mm or more, the adhesion effect between the placement agent and the core material is easily obtained, and when it is 20 mm or less, the placement agent is easily discharged in a preferable form.

As an example of the shape of the discharge cap in the present invention, as shown in FIG. 4, for example, in the case of depositing a depositing agent with a thickness of 30 mm and a width of 100 mm, the opening of the discharge cap is the length (a) = 90 mm, lower base length (b) = 100 mm, height = 30 mm, and an example in which the notch provided at the end on the lower base side is a rectangle of 100 mm × 8 mm.
In addition, in order to smoothly arrange in a more preferable shape, a shape in which the end of the notch (13 in FIG. 4) is rounded is preferable.

  As an example of the operation in the case of using the discharge base in the present invention, as shown in FIG. 5, the base material 1 is pulled while bringing the base bottom 9 of the base of the discharge base 14 into contact with the core material 1, and then the placement agent is provided. A method is mentioned. The angle 15 between the core material 1 and the base 14 at this time is preferably 15 degrees or less. If it is 15 degrees or less, the thickness of the discharged depositing agent becomes substantially the same as the height of the mouthpiece opening, and it can be deposited with a uniform thickness.

  In the case of placing in contact with an existing placement agent, it is preferable to place the mouthpiece 17 at an angle of 10 to 30 degrees with respect to the existing placement agent 6 as shown in FIG. When the angle 17 of the die is 10 to 30 degrees, the placement agent is likely to be in close contact with the core material 1 and it is difficult to form a gap between the rows. If the angle is less than 10 degrees, the uplifting agent does not sufficiently adhere to the core material 1. If the angle exceeds 30 degrees, the column width becomes too narrow, the number of columns increases, and the risk of loss of the model material increases.

The placement agent in the present invention is not particularly limited as long as it is a normal placement agent, and examples thereof include urethane resins and epoxy resins.
Examples of the urethane resin include a polyurethane resin obtained from polyether polyol and polymethylene polyphenyl isocyanate. For example, “Sun module F2-A” (manufactured by Sanyo Chemical Industries, Ltd., polyol component of urethane resin type mounting agent) And "Sun module F2-B" (manufactured by Sanyo Kasei Kogyo Co., Ltd., an isocyanate component of a urethane resin type mounting agent) and the like, and urethane resins described in JP-A-2003-160632 May be used.
As the epoxy resin, an epoxy resin obtained from a bisphenol A type epoxy resin and a polyamidoamine, for example, “Sun module FEA” (manufactured by Sanyo Chemical Industries, Ltd., epoxy component of an epoxy resin type mounting agent) and “Sun module FEB” ( An epoxy resin obtained from Sanyo Chemical Industries, Ltd. (polyamideamine component of an epoxy resin type mounting agent) and the like, and an epoxy resin described in Japanese Patent No. 2611912 may be used.

  The viscosity of the overlaying agent is usually 500 to 3,000 Pa · s at 25 ° C., and preferably 1,000 to 2,000 Pa from the viewpoint of difficulty of dripping on the vertical surface and liquid feeding property by a discharger. -S.

  The core material in this invention will not be specifically limited if it is a normal core material, As a composition, a polyurethane resin and a polystyrene resin are mentioned, for example.

  The two-liquid discharger in the present invention may be an ordinary one, and examples thereof include a drum can discharger “2NTL50 type” (manufactured by Hyojin Equipment Co., Ltd.) and Nodopox 200M / U (manufactured by TARTLAR).

  The method for producing a model material according to the present invention is a method for producing a model material, wherein a placement agent is placed by the placement method and then cured. The curing conditions are appropriately selected depending on the kind of the mounting agent used. For example, in the case of a urethane resin or an epoxy resin, the curing is performed at 50 to 100 ° C. for 2 to 20 hours. The model material obtained by the manufacturing method of the model material of the present invention has a feature that there are few gaps between rows on the core material.

  The model of the present invention is a model obtained by further cutting and painting the model material. In the cutting process, usually, a cutting machine such as an NC machine is used to cut and remove 1/4 to 1/2 of the thickness of the overlay from the surface side of the model material, and grinding with sandpaper is performed. Examples of the coating include surface coating with a surfacer and colored coating.

  Since the model of the present invention has few voids in the model material, holes, streaks, and the like rarely appear even if it is cut. Therefore, dents are less likely to occur on the painted surface. Further, even when the model is heated and undergoes a temperature change, the painted surface is less likely to crack.

<Example>
Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto. The commercially available raw materials used in the examples are as follows.
Dispensing agent:
"Sun module F2-A" (manufactured by Sanyo Chemical Industries, Ltd., polyol component of urethane resin type mounting agent)
“Sun module FEA” (manufactured by Sanyo Chemical Industries, Ltd., epoxy component of epoxy resin type mounting agent)
Placement curing agent:
"Sun module F2-B" (manufactured by Sanyo Kasei Kogyo Co., Ltd., isocyanate component of urethane resin type mounting agent)
“Sun module FEB” (manufactured by Sanyo Chemical Industries, Ltd., polyamidoamine component of epoxy resin type mounting agent)

<Example 1>
Snake pump [for drum cans] at a rate of 4 L / min in total for the prime agent “Sun module F2-A” and the hardener “Sun module F2-B” (main agent / hardener = 100/112 weight ratio) Discharger “2NTL50 type” (Hyoshin Equipment Co., Ltd.)
], And the Y-tubes are combined into one liquid feed line, and then the static mixer ["1.1
/ 2-N30-131-F "(manufactured by Noritake Company Limited)], mixed in 30 elements, trapezoidal shape (upper base 80mm, lower base 100mm and thickness 30mm, notch long side 100mm and short side 8mm The dispensing agent was discharged from a discharge port equipped with a base having an opening. As the core material, two rigid polyurethane foams (1,000 mm × 1,000 mm × 50 mm) were used, and the discharge liquid was placed on the 1,000 mm × 1,000 mm surface with a thickness of 30 mm.
The angle 15 in FIG. 5 was 10 degrees, and the angle 17 in FIG. 6 was 20 degrees.
After being left vertical at 25 ° C. for 1 hour, it was cured by heating at 70 ° C. for 10 hours. This was left to cool for 8 hours to obtain two model materials.

The model material (1,000 mm × 1,000 mm, thickness 80 mm) is fixed on a surface plate of an NC machine [“NCE23-1H type router” (manufactured by Kikukawa Iron Works Co., Ltd.)] and cut (cutting blade: The surface on the placement agent side was cut to a thickness of 65 mm of the model material with a face mill, 14 blades, 80 mmφ, rotation speed: 2,000 rpm, feed rate: 3,000 mm / min, cutting depth: 1 mm. The cutting surface was stripped with sandpaper No. 240 and No. 500 to make test pieces for coating.
Coating was performed three times with “Polyva NC Surfacer S120 White” manufactured by Kansai Paint Co., Ltd. using “Spray Gun W-100” manufactured by Anest Iwata Co., Ltd., and two models (test pieces A1) were obtained.

<Example 2>
The model material and the trapezoidal shape of the opening of the base were the same as in Example 1 except that a base having an upper base of 90 mm, a lower base of 100 mm and a thickness of 30 mm, a long side of the notch of 100 mm and a short side of 8 mm was used. Two models (test piece A2) were obtained.

<Example 3>
The model material and the trapezoidal shape of the opening of the base were the same as in Example 1 except that a base having an upper base of 95 mm, a lower base of 100 mm and a thickness of 30 mm, a long side of the notch of 100 mm and a short side of 8 mm was used. Two models (test piece A3) were obtained.

<Example 4>
“Sun module FEA” instead of “Sun module F2-A”, and “Sun module FEB” instead of “Sun module F2-B” as the main ingredient / curing agent = 100/35 A model material was obtained in the same manner as in Example 1 except that the weight ratio was used. Further, two models (test pieces B1) were obtained in the same manner as in Example 1.

<Example 5>
The model material and the trapezoidal shape of the opening of the base were the same as in Example 4 except that a base having an upper base of 90 mm, a lower base of 100 mm and a thickness of 30 mm, a long side of the notch of 100 mm and a short side of 8 mm was used. Two models (test piece B2) were obtained.

<Example 6>
The model material and the trapezoidal shape of the opening of the base were the same as in Example 4 except that a base having an upper base of 95 mm, a lower base of 100 mm and a thickness of 30 mm, a long side of the notch of 100 mm and a short side of 8 mm was used. Two models (test piece B3) were obtained.

<Example 7>
The trapezoidal shape of the opening of the base is the same as in Example 2 except that the base has a base having an upper base of 90 mm, a lower base of 100 mm, a thickness of 30 mm, a notch long side of 100 mm, and a short side of 3 mm. I got a model material. (Test piece A4) was obtained.

<Example 8>
The trapezoidal shape of the opening of the base is the same as in Example 2 except that the base has a base having an upper base of 90 mm, a lower base of 100 mm and a thickness of 30 mm, a long side of the notch of 100 mm, and a short side of 20 mm. I got a model material. (Test specimen A5) was obtained.

<Comparative Example 1>
A model material was obtained in the same manner as in Example 1 except that the base was a base having a rectangular opening (width 100 mm, thickness 30 mm). Further, two models (test pieces X1) were obtained in the same manner as in Example 1.

<Comparative example 2>
A model material was obtained in the same manner as in Example 4 except that the base was a rectangular base similar to that in Comparative Example 1. Further, two models (test pieces X2) were obtained in the same manner as in Example 4.

Evaluation of model (test piece) The painted surface of one of the two test pieces (A1) to (A3), (B1) to (B3), and (X1) to (X2) is visually observed. The presence or absence and state of dents and cracks on the painted surface were evaluated according to the following evaluation criteria. The remaining test pieces had the same evaluation of the coated surface of the test piece in which the holding time at −20 ° C. and 70 ° C. was 24 hours, the heating or cooling rate was 10 ° C./hour, and cooling and heating were repeated 10 times. Was performed visually. The results are shown in Table 1.
A: Completely smooth with no dents or cracks.
○: Almost smooth, but if observed closely, slight dents or cracks are observed in one or two places.
(Triangle | delta): Although it is almost smooth, slight dent or a crack is recognized by 3-10 places when it observes well.
X: At first glance, dents or cracks are observed in 1 to 2 places.
XX: At first glance, dents or cracks are observed at three or more locations.

  From the above results, in the method for producing a model material according to the present invention, it is difficult to form a gap between the existing placement agent, the core material, and the new placement agent. A model material can be produced without causing any problems.

  The method for manufacturing a model material of the present invention can be used for manufacturing a large model of an automobile or the like. The model material and model of the present invention are used for, for example, a large industrial model for confirming a design. As a specific example, a design model of an actual vehicle size of an automobile can be given.

It is sectional drawing which shows the arrangement | positioning state using the conventional rectangular base. It is sectional drawing which shows the arrangement | positioning state using the trapezoid-shaped nozzle | cap | die in this invention. It is a front view, a top view, a side view, and a bottom view showing a trapezoidal base in the present invention. It is a perspective view from the lower base side showing a nozzle | cap | die at the time of providing a notch in the trapezoid-shaped nozzle | cap | die in this invention. It is a side view which shows the arrangement | positioning state using the trapezoid-shaped nozzle | cap | die in this invention. It is a top view which shows the arrangement | positioning state using the trapezoid-shaped nozzle | cap | die in this invention.

(1) Core material (2) Existing placement agent (3) New placement agent (4) Gap formed between core material and placement agent (5) Cutting position (6) Existing placement with a base in the present invention (7) Newly placed placement agent placed with a base in the present invention (8) Upper base of the base opening (9) Lower base of the base opening (10) Parallel part of the base (11) Hose connection part (12) Below the base opening Notch in the bottom (13) End of the notch in the lower bottom of the opening of the base (14) Angle of the base (15) Core material and base (16) Center line of the base (17) Angle of the base relative to the existing placement agent

Claims (9)

  It is a method of mixing and discharging a model material placement agent with a two-liquid dispenser and placing it on a core material, wherein the opening of the discharge base of the two-liquid dispenser has a trapezoidal shape, and the long side of the trapezoidal shape is below A serving method characterized by serving as a bottom side while contacting the core material.   2. The method according to claim 1, wherein the trapezoidal shape has an upper base length (a) of 80 to 95% of a lower base length (b).   The discharge cap has a parallel part having the same shape as the opening, and the opening is provided with a rectangular notch with one side of the length (b) of the lower base of the trapezoid at the end on the lower base side. The arrangement method according to claim 1, wherein the arrangement method is a shape.   The ratio of the length of the short side to the length of the long side of the rectangular cutout is 0.02 to 0.3, and the length of the short side is 3 to 20 mm. How to serve.   The placement method according to any one of claims 1 to 4, wherein the placement agent is at least one selected from the group consisting of a two-component curable urethane resin and an epoxy resin.   A method for producing a model material, comprising: placing a placement agent by the placing method according to claim 1, and then curing the placement agent.   The model raw material obtained with the manufacturing method in any one of Claims 1-6. A model obtained by further cutting and painting the model material according to claim 7, wherein the total number of dents and cracks per 1 m ^{2 of} the painted surface is 1 or less.   It is a discharge nozzle of a two-liquid discharge machine used in a method of mixing and discharging a model material placement agent by a two-liquid discharge machine and placing it on a core material, wherein the opening of the discharge nozzle is trapezoidal, The length (a) of the upper base of the trapezoidal shape is 80 to 95% of the length (b) of the lower base, the discharge cap has a parallel part having the same shape as the opening, and the opening is trapezoidal. The bottom base length (b) is a shape in which a rectangular cutout is provided at the end of the bottom base side, and the ratio of the short side length to the long side length in the rectangular cutout is 0. Discharge cap that is 0.02-0.3.

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