KR100241942B1 - How to Play the Rear Combination Lamp Assembly - Google Patents

Abstract

The present invention relates to a regeneration method of a rear combination lamp assembly, and in particular, to crush the acrylonitrile-butadiene-styrene (ABS) -based rear combination lamp assembly composed of sub-components of different materials. Combination lamp that can be used to separate waste from separation solution at least once and then to dry it and to extrude and regenerate using extruder to reduce waste disposal cost and to recycle defective products during production or assembly process. A method for regenerating an assembly.

[Index]

Rear combination lamps, recycling

Description

How to Play the Rear Combination Lamp Assembly

The present invention relates to a regeneration method of a rear combination lamp assembly, and in particular, to crush the acrylonitrile-butadiene-styrene (ABS) -based rear combination lamp assembly composed of sub-components of different materials. Combination lamp that can be used to separate waste from separation solution at least once and then to dry it and to extrude and regenerate using extruder to reduce waste disposal cost and to recycle defective products during production or assembly process. A method for regenerating an assembly.

In general, a rear combination lamp of an automobile is composed of a lens part and a housing part. In the case of acrylonitrile-butadiene-styrene (ABS), the lens part is made of polymethyl methacrylate (PMMA). The material of the part is ABS resin, and the inner lens is made of polycarbonate resin.

Bonding of the lens unit and the housing unit uses a hot melt adhesive and a hook structure.

In addition, depending on the specification, a reflector made of steel, that is, a reflector may be used.

Since the rear combination lamp is composed of different materials, it is difficult to recycle, but ABS and PMMA have good compatibility, so that the entire assembly may be pulverized to manufacture recycled resin.

However, since the hot melt adhesive remains, there is a problem accompanied by a decrease in physical properties such as impact strength, heat deformation temperature, elongation.

As described above, in order to solve the problem of the method of recycling the conventional ABS-based rear combination lamp made of various materials, in the present invention, the ABS-based rear combination lamp is pulverized, and then each material is separated and the raw material resin is fixed as necessary. By adding the content, the object of the present invention is to provide a manufacturing method for reducing waste disposal costs and recycling defective products generated during a production process or an assembly process while maintaining substantially the same physical properties as the raw material resin.

In the present invention, the ABS-based rear combination lamp assembly is crushed to 0.1 to 10 mm, the steel component contained in the pulverized product is first removed, and then the low specific gravity component (ABS, specific gravity = 1.04 ± 0.02) and the high specific gravity component ( The specific gravity of PMMA = 1.18 ± 0.02, the specific gravity of polycarbonate = 1.20 ± 0.03) is characterized in that the separation recovery, drying and extrusion regeneration.

Referring to the present invention in more detail as follows.

Looking at the material of each component constituting the present invention in detail.

The housing is composed of a thermoplastic resin composition containing ABS as a main component, and the ABS resin is a thermoplastic resin composition in which rubber is reinforced to a styrene-acrylonitrile (SAN) copolymer as a matrix.

SAN used as a matrix of the ABS may include a comonomer (alpha-methyl styrene), maleimide (Comonomer) and the like to improve the heat resistance.

The rubber used in the production of ABS resin is a copolymer in which SAN is grafted to general polybutadiene (PB).

ABS used in the rear combination lamp assembly for automobiles is mainly modified ABS having high heat resistance, and the ABS resin used in the present invention is an injection molding resin having the above resin component.

The lens unit uses a material made of a thermoplastic resin, which is polymethyl methacrylate (PMMA). The PMMA may include a pigment, and three kinds of colors, which are mainly used in automotive lenses, are red, amber, and transparent.

Hot melt adhesives used to bond such housing parts and lens parts include atactic polypropylene (APP), ethylene-vinyl-acetate copolymer (EVAc), styrene-butadiene-styrene (SBS), styrene-isoprene-styrene (SIS ) Or isobutyl-isoprene rubber (IIR) or the like can be used as a main component.

Depending on the vehicle model, the ABS-based rear combination lamp assembly may have a steel reflector or an internal lens made of polycarbonate (PC).

The regeneration process is as follows.

As a method of regenerating the vehicle rear combination lamp assembly of the present invention, first there is a process of grinding the rear combination lamp assembly, the grinding process is first ground using a mechanical grinder such as a slow mill, a high speed mill, such a grinding process May be performed in one step, but may be subjected to two or more grinding processes.

For example, the lamp assembly is first ground in a low speed mill and then ground in a high speed mill.

At this time, the average particle diameter of the particles is preferably 0.1 ~ 10mm.

If the average particle diameter of the pulverized product is less than 0.1 mm, the bridging phenomenon tends to occur when the extruder is put into the extruder, and when the average particle diameter exceeds 10 mm, it is difficult to add the powder, resulting in poor workability.

The above pulverization can be performed at room temperature, and cooling is preferably performed to prevent the temperature rise during the pulverization, and water is usually used as the cooling medium at this time.

In the case where the steel component is included in the pulverized component through such a process, it is separated by using a permanent magnet or an electromagnet.

The pulverized product thus prepared is placed in a container containing a separation solution.

The separation solution is composed mainly of glycol (Glycol) or polyol, wherein the glycol is ethylene glycol (specific gravity = 1.113), diethylene glycol (specific gravity = 1.118), polyethylene glycol (specific gravity = 1.127), polypropylene glycol (specific gravity = 1.004), and the like.

The separation solution may contain water or alcohol to control specific gravity.

Before going through the separation process, it is possible to add a process of first separating the pulverized product with an excessive adherence of hot melt adhesive into water by specific gravity difference.

When the separation using the specific gravity difference can be used to further increase the separation effect, in this case, usually 10 seconds to 60 minutes, more preferably 1 to 10 minutes to stir.

After stirring, the ABS component having a low specific gravity among the pulverized components is suspended, and the PMMA component having a high specific gravity is precipitated, thereby separating and recovering them.

The milled product is separated and ground, washed and dried.

The drying may be performed at 40 to 130 ° C. and the drying may be performed separately in a hot air dryer, and a dryer attached to a hopper of an extruder may be used.

The extruder extrudes a single screw extruder or a twin screw extruder at 180-270 degreeC, More preferably, 210-240 degreeC using the usual extruder for thermoplastic resins.

It is possible to mix | blend additives, such as antioxidant, a ultraviolet stabilizer, a coloring agent, and a filler, as needed at the time of extrusion.

In the resin recycled by the method of the present invention, ABS can be used as it is, or can be mixed with the raw material resin and used again as a housing material of the rear combination lamp assembly.

In the case of polymethyl methacrylate, it is difficult to use it as a lens material because the resin having a different color is mixed at the time of recovery.

Although this invention is demonstrated based on an Example, this invention is not limited by an Example.

Example 1

The rear combination lamp assembly without the inner lens was ground to have an average particle diameter of 5 mm.

The pulverized product was placed in a container containing ethylene glycol, stirred for 5 minutes with a stirrer, and left for 5 minutes, and suspended in a low specific gravity acrylonitrile-butadiene-sterene (ABS) component and a high specific gravity polymethyl methacrylate component. Each was separated and recovered as a precipitate.

After washing with water and drying in a dehumidifier at 90 ° C., the pellets were extruded at 225 ° C. and 250 rpm, respectively, by using a co-rotating twin screw extruder to recover ABS and polymethyl methacrylate. It was made.

That is, it is made of small grains of constant size.

Example 2

ABS resin and polymethyl methacrylate (PMMA) resin regenerated in the same manner as in Example 1 were pelletized by uniformly mixing with the raw material resin at a ratio of 50: 50% by weight, respectively.

Example 3

The rear combination lamp assembly with the inner lens was ground to have an average particle diameter of 5 mm, and the recovered ABS, PMMA, and polycarbonate mixed resin were recovered and recovered in the same manner as in Example 1, where PMMA and PC were The mixed resin was injection molded and pelletized.

Example 4

The ABS resin, PMMA and PC resin recovered in Example 3 and the method were evenly mixed in a super mixer, then injection molded, extruded and pelletized.

Comparative Example 1

The raw resin was injection molded and pelletized.

Comparative Example 2

PMMA and PC, a raw material resin, were uniformly mixed at a ratio of 75% by weight to 25% by weight, and then injection molded and pelletized.

Experimental Example

For the materials according to Examples 1 to 4 and Comparative Examples 1 to 2, physical properties such as specific gravity, tensile strength, flexural modulus, Izod impact strength, and HDT were measured.

Specific gravity was measured by ASTM D1505, tensile strength by ASTM D638, flexural modulus by ASTM D790, Izod impact strength by ASTM D256, and HDT by ASTM D648. The results are shown in Table 1.

TABLE 1

As shown in Table 1 above, the recycled resin of the ABS-based rear combination lamp assembly recovered in the present invention may be somewhat inferior in physical properties to the raw resin, but the recycled resin and the raw material resin of the present invention may be mixed and used. In this case, the physical properties can be improved to almost the same level.

Therefore, the present invention can reduce the waste disposal cost and can be usefully applied to recycle the defective products generated during the production process or assembly process.

Claims (7)

The acrylonitrile-butadiene-styrene (ABS) -based rear combination lamp assembly is ground to 0.1 to 10 mm, the steel component contained in the mill is first removed, and then the low specific gravity component (ABS, specific gravity = 1.04 ± 0.02) in the separation solution. ) And a high specific gravity component (specific gravity of PMMA = 1.18 ± 0.02, specific gravity of polycarbonate = 1.20 ± 0.03), and then recovered and dried. The method for regenerating an ABS rear combination lamp assembly according to claim 1, wherein a separation solution containing ethylene glycol, diethylene glycol, polyethylene glycol, or polypropylene glycol as a main component is used as the recovery method. The method of claim 1, wherein the separation method comprises first separating the components having a large amount of hot melt attached thereto using water prior to separation into the separation solution, and then recovering, drying, and extruding using the secondary separation solution. A method of regenerating an ABS rear combination lamp assembly. The method for regenerating an ABS rear combination lamp assembly according to claim 1 or 3, wherein the resin separated and recovered through the separation method using the separation solution is used as it is or mixed with the raw material resin. . The method of claim 4, wherein in the case of using a mixture of the resin separated and recovered by the separation method using the separation solution and the virgin resin (Virgin polymer), 2 to 98% by weight of the raw resin is added to the ABS-based rear How to Play Combination Lamp Assembly. The method of claim 5, wherein the raw material resin is mixed with the resin separated and recovered through the separation method using the separation solution using a Wood mixer, Henschel mixer or Super mixer ABS injection molding method, characterized in that for use in the regeneration of the rear combination lamp assembly. The method of claim 6, wherein the additive added in the mixing process is an antioxidant, ultraviolet stabilizer and coloring agent 0.01 to 10% by weight of the regeneration method of the ABS-based rear combination lamp assembly.