JPH044225A - Capsule-like resin material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a novel capsule-shaped resin material composed of a powdered resin that allows the resin to be modified.

[Prior art] Common methods for molding plastic materials include injection molding, which involves melting the plastic material at high temperatures and then injecting it, blowing, and Hondo press molding, which involves applying heat and molding at high temperatures like thermosetting resins. There is a method. All of these molding methods involve melting the plastic material and then cooling it to solidify it. However, once molded, secondary processing (plastic processing such as bending) is difficult at room temperature (cold). If processed forcibly, whitening (microcracks) may occur, resulting in product defects. For example, when a plastic outer panel is used for the outer panel of a car, if there is a step at the joint with another structural member and the step can only be resolved by deforming the plastic outer panel, it is possible to temporarily press the plastic outer panel. Even if the plate is deformed, the outer plate inevitably springs back and returns to the shape it was in when it was molded, causing problems such as steps remaining or whitening occurring. This is because, as shown in FIG. 12, the plastic region a of plastic is much narrower than that of steel (plastic region of iron) b. Therefore, with conventional resin molded products, after molding, it cannot be locally deformed or subjected to cold (indoor temperature atmosphere) bending using a press like steel.

In addition, from another point of view, it is extremely difficult to bond resins together by heating once they have been molded, and this is a problem that must be solved in addition to the above-mentioned problem.

[Means for Solving the Problems and Their Effects] In the first invention, when applying a deforming force to a resin molded body molded into a predetermined shape, in order to make the part deformable without causing cracks, As a resin molding material, the surface of particles of plastic clay is coated with resin particles in a capsule shape to form a capsule-shaped resin material.

In other words, when the plastic clay particles whose surfaces are coated with the resin particles in a capsule-like manner are subjected to a load after being molded into a predetermined molded body as a capsule-like resin material, the resin particles will crack between each other, causing the particles to break freely. The shape changes. That is, as the capsule particles deform, the plastic clay also deforms and invades the cracked area. Therefore, the molded body formed from the above-mentioned capsule-shaped resin material can be deformed in desired portions by cold working, which not only solves the problem of springback in conventional resin products, but also enables the above-mentioned capsule-shaped It becomes possible to perform cold processing using a plate-shaped molded body (sheet material) formed of particles.

The second invention provides a first liquid of a two-type mixed reactive adhesive as a hot press resin molding material or an adhesive material between resin molded bodies;
A capsule-shaped resin material is formed by encapsulating the second liquid in capsules each made of an aggregate of separate resin particles.

In the second invention, by applying an external load,
At the same time, the aggregate of resin particles cracks and deforms freely, and at the same time, the first and second liquids of the two-type mixed reaction adhesive sealed in the aggregate of separate resin particles are released from the cracked part of the aggregate. It starts to devour. That is, the capsule-shaped resin material deforms freely under load, similar to the first invention. The first and second liquids that bulge out at the same time as the deformation react and harden, so that the molded body made of this capsule-shaped resin material has a predetermined amount of deformation compared to the first invention. It becomes fixed and springback is completely prevented.

As a result, similar to the first invention, cold working (repair, etc.) becomes possible, and cold-subsequent working becomes possible.

In this second invention, the thickness of the layer of the particle aggregate and the type of resin are changed to cause cracking of the particle aggregate to occur at a predetermined pressure or temperature, and this is used to bond the molded bodies together. When the particles are arranged partially or entirely in a part, it becomes possible to apply pressure to these abutting parts in a cold state to cause pressure cracks in the aggregate of particles and to join them together. Also, in this case,
Of course, it is also possible to perform the mutual connection by heating using a capsule-shaped resin material configured to cause thermal cracking.

In the third aspect of the invention, a capsule-shaped resin material is formed by encapsulating metal particles that generate heat by high-frequency induction in a resin capsule made of an aggregate of resin particles as a resin molding material or an adhesive material between resin molded bodies.

In this third invention, high-frequency induction is applied to the metal particles, and the core particles generate heat due to the high-frequency induction, which turns only the fine surface layer of the core particles into resin with a temperature higher than the melting temperature, and at the same time softens the resin particles. state. As a result, when an external load is applied, the resin particles begin to slide relative to the core particles, and the moldability of the resin molded article is dramatically improved. Therefore, by forming a molded body into a plate shape (sheet material) using the capsule-shaped particles of the third invention, and adjusting the range of high-frequency induction for the molded body, it is possible to suitably perform cold press working and bending. It becomes possible to perform processing. If the deformation is to be fixed, it is done by cooling immediately after the press work is completed.

[Embodiment] A preferred embodiment of the present invention will be described below based on the accompanying drawings.

(Example 1) As shown in FIG. 1 (A), first, a plastic clay with high deformability is used as a core particle 1 (hereinafter referred to as a core particle), and the surface of this particle 1 is (hereinafter referred to as coated particles) 2 to form capsule-like particles 3. When injection molding or hot pressing is performed using the capsule particles 3 as a raw material for injection or hot press molding, a resin molded body 4 in which core particles 1, that is, plastic clay particles are uniformly dispersed in the coated particles 2, is produced. is formed. In such a resin molded body 4, the particles of plastic clay constituting the core particles 1 in the portion to which the deformation load is applied protrude from the gap between the coating particles 2 due to the pressure, resulting in cracks, etc. This allows deformation to occur without causing any defects, thereby eliminating springback, which has been a problem in the past, to a considerable extent.

In order to completely eliminate the springback, in this embodiment, as shown in FIG.
are mixed and molded into a resin molded body 4 by hot press molding. These adhesive capsule particles 3a and 3b are a first liquid (liquid A) and a second liquid (liquid B) of a two-liquid heating reaction type adhesive.
The liquid) is used as a core particle, and the coated particles 2 are formed on the surface of each core particle to form a capsule shape. This adhesion may be formed by colliding the coated particles 2 with the first liquid and the second liquid, and the first liquid with a large number of coated particles 2.
The adhesion may be formed by rolling the liquid (or the second liquid),
Adhesion may be formed by electrostatic force using an electrostatic method.The two-component thermal reaction type adhesive described above is preferably an epoxy-based adhesive that has minimal fluidity at room temperature and atmospheric pressure and has appropriate hardness. There is.

Arartite is a commercially available product.

When the resin molded body 4 obtained by hot-pressing the mixture of the capsule-shaped particles 3 and the two types of adhesive capsule-shaped particles 3a and 3b is subjected to cold bending as shown in FIG. A crack enters between the coated particles 2 forming the skin of the adhesive capsule-shaped particles 3a and 3b distributed in the parts, and the first liquid and the second liquid, which serve as the core, are extruded from the cracked part and react with each other to harden. do. As a result, the first liquid, the second liquid
The resin molded body 4 is completely fixed at the desired bending angle by the liquid, and there is no springback. Therefore, according to this embodiment, ■ cold secondary processing (deformation) is possible without cracking and springback. ■If the degree of processing is small (capsule-shaped particles 3a).

If the damage of 3b is small), it is possible to perform plastic processing as many times as metal.■ In addition to secondary processing such as repair and correction, the above capsule-shaped particles 3.3a, 3 can be used in place of conventional high-temperature molding.
It has improved functions such as cold blow molding becomes possible using the sheet material formed in step b, and ■ Since it is not processed at high temperatures, it is possible to extend the life of the molded product 4 without worrying about its heat shock life. , the applications will be expanded dramatically.

(Example 2) As shown in FIGS. 5 and 6, in this example, the above two
In the seed adhesive capsule particles 3a, 3b, the layer thickness (coating thickness) of the coated particles 2 forming the outer shell of each of these adhesive capsule particles 3a, 3b is adjusted to give an arbitrary pressure or an arbitrary temperature. Form so that the hardening is opened. These adhesion capsule particles 3a, 3b are uniformly mixed to form a mixed raw material, and resin adhesion panels 4a, 4b are formed by hot pressing. Therefore, when a resin panel mixed with these adhesive capsule particles is cold pressed as explained in FIG. 3, the adhesive capsule particles 3a and 3b are cracked by the press pressure, and the two liquids (first liquid, first liquid, The second liquid) warps and hardens, making it possible to press even in the cold by pressing with pressure within elastic deformation.

That is, adhesive capsule-shaped particles 3a prepared for pressure-sensitive use
, 3b are used to form a resin bonded panel, and when these resin bonded panels are bonded to each other and pressurized as shown in FIG. 2 liquids (1st liquid, 2nd liquid)
liquid) reacts outside the adhesive capsule particles 3a and 3b,
It begins to harden. As a result, the resin adhesive panel 4a,
4b mutually becomes integrally joined 1, t,
In this case, even if a resin adhesive panel is formed using adhesive capsule particles 3a and 3b prepared for temperature-sensitive use and heated at the same time as they are bonded, the same bonding is possible (FIG. 6). Adhesive capsule-shaped particles 3a adjusted to be pressure-sensitive and heat-sensitive.

3b to form an adhesive member for bonding resin plates to each other, and when repairing a concave portion of the resin molded body 4, it is possible to form a padding of capsule-shaped particles 3a, 3b in the concave portion. Of course, it is also possible to repair the cracks by causing them to crack due to pressure and temperature.

(Example 3) In this example, metal particles that generate heat by high-frequency induction are encapsulated in a resin capsule made of an aggregate of coated particles 2 as a resin molding material or an adhesive material between resin molded bodies 4 to form capsule-shaped particles 3C. It was formed. As shown in FIG. 7, these capsule-shaped particles 3C are made by finely powdering a metal (for example, iron or aluminum) as a core particle 1, and coating the coated particles 2 on the surface of the obtained core particle 1 in a capsule shape. Formed by covering and fixing.

Then, depending on the purpose and use, the capsule-shaped particles 3C may be locally concentrated and blended with other resin materials as shown in FIGS. 8 and 9, or only the capsule-shaped particles 3C may be used as a molding raw material. Resin molded body 4 by hot press molding
form. In other words, the resin molded body 4 formed by locally concentrating the capsule-shaped particles 3C can be easily press-molded by applying high-frequency induction to only that part and performing cold pressing. The resin molded body 4 composed only of shaped particles 3C has a high frequency induction degree,
By adjusting the range, it can be molded into any shape. In other words, the core particle 1 generates heat due to high-frequency induction, and due to the heat, only the fine surface layer of the core particle 1 becomes a resin with a temperature higher than the melting temperature, and the coating particle 2 softens, so that relative slip occurs when an external load is applied. As a result, the moldability of the resin molded body 4 is dramatically improved. The shape is fixed by cooling.

In addition, when joining the resin molded body 4, as shown in FIGS. 10(a) and 10(b), the capsule-shaped particles 3c are concentrated in a build-up shape and hot press molded, and the capsule-shaped particles The concentrated portions 3c are joined together by high frequency induction. Furthermore, as shown in FIGS. 11(a) and 11(b), when repairing the concave portion of the resin molded body 4, a build-up of capsule-shaped particles 3c is formed in the concave portion, and this is melted by high-frequency induction. Of course, it is also possible to apply pressure to perform repairs.

[Effects of the Invention] As is clear from the above explanation, according to the present invention, a resin molded body can be formed that can be plastically deformed in a cold state, and
It has the excellent effect of providing a resin material suitable for repair, repair, and adhesion.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing a first embodiment of the present invention, FIG. 2 is a schematic diagram showing an improved example of the first embodiment, and FIGS.
The figure is a schematic diagram showing the state of cold working of a resin molded body, Figures 5 and 6 are schematic diagrams showing a second example of actual fiber of the present invention, and Figure 7 is a schematic diagram showing a third embodiment of the present invention. Fig. 8 is a schematic diagram showing one state of the resin molded product in the third embodiment, Fig. 9 is a schematic diagram showing the cold working state, and Figs.
A schematic diagram showing the application of an actual planer example, and FIG. 12 is a diagram showing elastic changes of iron and plastic (tM resin). In the figure, 1 is a core particle, 2 is a coated particle, and 3, 3a3b, and 3c are capsule-shaped particles.

Claims (1)

[Claims] 1. A capsule-shaped resin material as a resin molding material, which is formed by coating the surface of core particles of plastic clay with resin particles in a capsule-like manner. 2. A capsule-shaped product in which a first liquid and a second liquid of a hot-pressed resin molding material or a two-type mixed reaction adhesive are each encapsulated in a capsule made of a separate aggregate of resin particles as an adhesive material between resin moldings. resin material. 3. A capsule-shaped resin material, which is a resin molding material or an adhesive material between resin moldings, and is made by encapsulating metal particles that generate heat by high-frequency induction in a resin capsule made of an aggregate of resin particles.