JP2008080192A - Resin-forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a useful resin-forming device which efficiently breaks capsules of capsule-type resin. <P>SOLUTION: The resin-forming device uses a first agent and a second agent which is contained in microcapsules, as the raw materials, breaks the microcapsules, stirs the second agent appearing from the microcapsules to chemically react the first agent with the second agent to form resin. In addition, the breaking and stirring of the microcapsules are carried out in a dispenser for applying the resin. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention uses the first agent and the second agent encapsulated in the microcapsule as raw materials, stirs the second agent and the first agent exposed by breaking the microcapsule, and the first agent and the second agent. The present invention relates to a resin forming apparatus that forms a resin by chemically reacting with an agent. In particular, it is suitable for use in a dispenser that forms a thermosetting resin and applies it as an adhesive, a sealing material or a coating material. Furthermore, it is more suitable when it uses for the dispenser which forms an epoxy resin and apply | coats as an adhesive agent.

  Conventionally, epoxy resins have been widely used as adhesives, coating agents, casting agents and the like because of their excellent properties. As the conventional epoxy resin composition, a so-called two-pack type composition in which two components composed of a main agent and a curing agent are mixed at the time of use is often used. The two-pack type epoxy resin composition can control the curing temperature and time, such as making it a composition that can be cured even near room temperature by combining the epoxy resin that is the main agent and the curing agent, and the main agent and the curing agent are separated. Therefore, there are advantages such as good storage stability of each. On the other hand, precise work such as metering and mixing of the main agent and hardener is necessary, and generally the mixture of the main agent and hardener has a short usable time. There are disadvantages such as the workability changes due to sticking, and in some cases, it becomes gelled and cannot be used.

  Therefore, a microcapsule type epoxy resin was invented in which a curing agent was included in the microcapsule and the microcapsule and the main agent were mixed (Patent Documents 1 and 2). At the time of use, the microcapsule is physically broken to expose the curing agent, and the curing agent and the main agent are chemically reacted (crosslinking reaction) to form an epoxy resin. If a highly reactive curing agent is selected, the chemical reaction (curing) is completed in a short time (for example, several minutes), so that workability is greatly improved. Incidentally, a microcapsule type epoxy resin in which the main agent is contained in a microcapsule and the microcapsule and a curing agent are mixed is also possible.

  However, since an apparatus for efficiently destroying microcapsules (hereinafter referred to as “capsules”) has not been put into practical use, the usage of microcapsule type epoxy resins (hereinafter referred to as “capsule type resins”) is limited. There was a problem. That is, the use of the capsule-type resin has been limited to special uses such as a screwing agent and a sealing agent using shear during assembly. In the screwing agent, the capsule resin is applied to the screw portion before screwing, and the capsule is broken by the frictional force near the screw at the time of screwing to form an epoxy resin.

Japanese Patent Publication No.43-17654 JP 2001-316451 A JP-A-6-207152

  This invention is made | formed in view of the said problem, The objective is to provide the practical resin formation apparatus which can perform destruction of the capsule of capsule-type resin efficiently.

This invention provides the resin forming apparatus as described in each claim of a claim as a means for solving the said subject.
According to the first aspect of the present invention, the resin forming apparatus is characterized in that the microcapsules are broken and stirred in a dispenser for applying a resin. For this reason, by destroying and stirring the capsule immediately before application, the resin can be cured in a short time, and workability and productivity are improved. It is also possible to minimize the amount of capsule-type resin (resin that is not used for bonding) that is discarded to prevent sticking in the dispenser by stopping capsule destruction when the application operation is suspended. Become.

  According to the second aspect of the present invention, the resin forming apparatus is configured such that a part of the gap between the inner surface of the syringe and the outer peripheral surface of the stirring rotating body is smaller than the outer dimension of the capsule, thereby It is characterized by destroying the capsule. By providing the stirring rotating body with the function of breaking and stirring the capsule, a very simple mechanism is obtained.

  According to the invention described in claim 3, the resin forming apparatus is characterized in that the other part of the gap is larger than the outer dimension of the microcapsule. As a result, the other part of the gap becomes a passage of the capsule-type resin, and the second agent (for example, the curing agent) and the first agent (for example, the main agent) that are exposed by breaking the capsule are stirred by the rotating body for stirring. It is possible to pass through the outlet at an appropriate flow rate.

  According to the invention described in claim 4, in the resin forming apparatus, the syringe has a substantially inverted conical shape, the rotating body for stirring is a rotating body that rotates about the center line of the syringe, and the gap The convex part which forms a part of this, and the recessed part which forms the other part of the said clearance gap are formed in the said rotating body outer periphery for stirring. This shows a specific embodiment of the invention described in claim 3.

  According to the invention of claim 5, the resin forming apparatus is characterized in that the position of the stirring rotator can be adjusted in the direction of the rotation axis of the stirring rotator so that the gap can be adjusted. Yes. By making the gap adjustable, the resin forming apparatus has a structure compatible with various microcapsules.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an overall configuration of a resin forming apparatus according to the present invention. FIG. 2 is a first embodiment of a resin forming apparatus according to the present invention, and FIG. 3 is an enlarged view of a section AA in FIG. FIG. 4 is a view corresponding to FIG. 3 of the second embodiment according to the present invention, and FIG. 5 is an enlarged sectional view of the microcapsule.

(First embodiment)
A first embodiment of a resin forming apparatus according to the present invention will be described.

  First, the microcapsule 20 contained in the raw material 40 (refer FIG. 1) for forming resin is demonstrated, referring FIG. In this embodiment, the main agent is encapsulated in the microcapsule 20. The microcapsule 20 is a sphere having a diameter of about 100 μm. What mixed this microcapsule 20 in the hardening | curing agent in the appropriate ratio becomes the raw material 40 for forming resin. Reference numeral 21 denotes a microcapsule shell made of melamine. 22 is a bis-A epoxy as a main ingredient. The curing agent is a modified polyamine, and ethanol is used as a diluent. These weight ratios are roughly the ratios of bis A epoxy 70, melamine 30, modified polyamine 50, and ethanol 30.

  Next, the apparatus of the first embodiment will be described with reference to FIG. In FIG. 1, 100 is a dispenser device, 11 is a tank, 12 is a pump, 40 is a capsule-type resin as a raw material, 91 is an epoxy resin that is sent from the dispenser 100 and hardened, and 92 is a work (workpiece). The tank 11 is filled with a liquid raw material 40.

  The dispenser device 100 will be described with reference to FIGS. 2 and 3. In FIG. 2, reference numeral 1 denotes a rotary stirring body having four blades, 1 a denotes a rotating shaft of the rotary stirring body 1, 2 denotes a dispenser, 2 a denotes an outlet (discharge port) of the dispenser 2, and 2 b denotes an inlet (supply port) of the dispenser 2. 2c is a syringe and 3 is a motor. The rotary stirrer 1 is rotationally driven by a motor 3 via a rotary shaft 1a. The syringe 2c has a substantially inverted conical shape so that its diameter decreases toward the outlet 2a. There is a gap between the inner surface of the syringe 2 c and the outer peripheral surface of the stirring rotating body 1. Rotating stirrer so that a part C1 of this radial gap C between the rotating stirrer 1 and the syringe 2c (usually the gap between the outer diameter part of the wing and the syringe 2c) is smaller than the outer dimensions of the microcapsule. 1 is positioned with respect to the syringe 2c. The rotary agitator 1 has a structure in which the relative positioning in the vertical direction (rotation axis direction) with respect to its own syringe 2c can be freely adjusted. The structure is compatible with capsules. The four blades of the rotary stirring member 1 have a straight shape, but may have a helical shape.

  The other portion C2 of the radial gap C between the rotary stirring member 1 and the syringe 2c is much larger than the outer dimensions of the microcapsules. As a result, the other part C2 of the gap becomes a passage for the capsule-type resin, and the main agent and the curing agent that are exposed by breaking the capsule can pass through the dispenser outlet at an appropriate flow rate while being stirred by the rotating body 1 for stirring. It becomes possible. And the capacity | capacitance of the syringe 2c is 1.5 cc, and a motor rotation speed is 400 rpm.

  Next, a method for forming an epoxy resin using the apparatus of the first embodiment will be described. As shown in FIG. 1, the raw material 40 is supplied to the dispenser 2 by the pump 12. In the raw material 40, the microcapsules are destroyed by a method described later in the dispenser 100, and the main agent and the curing agent chemically react. The epoxy resin 91 formed by the chemical reaction is applied to the workpiece 92 from the dispenser outlet 2a.

  Processing for the raw material 40 in the dispenser 2 will be described with reference to FIG. The raw material 40 conveyed from the pump 12 flows into the syringe 2 c of the dispenser 2 from the inlet 2 b of the dispenser 2. The microcapsule 20 contained in the raw material 40 receives a centrifugal force from the blades of the rotating agitator 1 and is shifted to the vicinity of the inner periphery of the syringe 2c (that is, the outer periphery of the blade).

  The microcapsules 20 that have been aligned are sheared and destroyed by the outer periphery of the blades of the rotary stirring member 1. This is because a part C1 of the radial gap C is smaller than the outer dimension of the microcapsule. An epoxy resin is formed by stirring the main agent and the curing agent exposed by breaking the microcapsules with the blades of the rotary stirring body 1 to cause a chemical reaction.

  When stopping the adhesive application work, the dispenser inlet 2b is shut off and the operation of the motor 3 is stopped. Then, by discharging all the capsule-type resin in the syringe 2c, it is possible to prevent the resin from sticking in the syringe.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, only the rotary stirrer of the first embodiment is changed. For this reason, only a change part is demonstrated. In 2nd Embodiment, it replaces with the rotary stirring body 1 provided with four blades, and the rotary stirring body 1x with the shape cross section which has eight protrusions is comprised.

  The function of the rotary agitator 1x is almost the same as that of the rotary agitator 1 of the first embodiment, but the following two matters are different from those of the rotary agitator 1 of the first embodiment. That is, as a first point, the passage cross-sectional area S2 of the capsule resin in the rotary agitator 1x is considerably smaller than the passage cross-sectional area S1 of the capsule resin in the rotary agitator 1. The second point is that there are eight gaps C1 that are smaller than the outer dimensions of the microcapsules in the rotating agitator 1x.

The rotary stirrer 1 according to the first embodiment has a drawback that since the passage cross-sectional area S1 is large, there are many raw materials 40 that pass through the rotary stirrer 1 without breaking the capsule. In order to eliminate this defect, in the rotary agitator 1x of the second embodiment, the number of functional parts for breaking the capsule is increased and the passage cross-sectional area S2 is made smaller than S1. Thereby, the synergistic effect that the flow rate of the raw material 40 is reduced and the amount of capsules to be broken is increased is generated. By combining the two means, the raw material 40 passing through the rotary stirring member 1 without breaking the capsule was greatly reduced.
The passage cross-sectional area S2 has an optimum value in correlation with the clearance C1, the motor rotation speed, and the viscosity of the raw material 40.

  As described above, according to the present invention, it is possible to provide a practical resin forming apparatus that can efficiently destroy the capsule of the capsule-type resin.

It is the figure which showed the whole structure of the resin forming apparatus which concerns on this invention. 1 is a first embodiment of a resin forming apparatus according to the present invention. It is an enlarged view of the AA cross section of FIG. It is a figure equivalent to FIG. 3 of 2nd Embodiment which concerns on this invention. It is an expanded sectional view of a microcapsule.

Explanation of symbols

  100 dispenser device

Claims (5)

Using the first agent and the second agent (22) encapsulated in the microcapsule (21) as a raw material, stirring the second agent and the first agent exposed by breaking the microcapsule (21), A resin forming apparatus (100) for chemically forming a first agent and a second agent to form a resin,
A resin forming apparatus, wherein the microcapsules are broken and stirred in a dispenser (2) for applying the resin.   The dispenser (2) includes a syringe (2c) to which the raw material is supplied, and a stirring rotating body (1) for stirring the raw material in the syringe (2c). Destroying the microcapsule in the part (C1) of the gap by making a part (C1) of the gap with the outer peripheral surface of the rotating body (1) smaller than the outer dimension of the microcapsule (21). The resin forming apparatus according to claim 1.   The resin forming apparatus according to claim 2, wherein the other part (C2) of the gap is larger than an outer dimension of the microcapsule. The syringe (2c) has a supply port (2b) to which the raw material is supplied and a discharge port (2a) for applying the resin, and the diameter thereof decreases toward the discharge port (2a). In addition, it has a substantially inverted conical shape,
The stirring rotating body (1) is a rotating body that rotates around the center line of the syringe (2c), and includes a convex portion that forms a part of the gap (C1) and the other part of the gap ( The resin forming apparatus according to claim 3, wherein a concave portion forming C <b> 2) is formed on the outer peripheral surface of the stirring rotor.   The position of the rotating body for stirring (1) can be adjusted in the direction of the rotation axis of the rotating body for stirring (1) so that the gap (C1) can be adjusted. The resin forming apparatus as described.

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