KR20030058611A - A sunshade for car and the manufacturing method of the same - Google Patents

Abstract

PURPOSE: Provided are a sunshade for automobile and its preparation method by heating and pressing can-board and EPP foam and finishing outline and edges to obtain favorable surface appearance and strength of the sunshade, to reduce production cost because of requiring no further process. CONSTITUTION: The sunshade is obtained by a process comprising several steps of: inserting a pair of can-boards(2,2a) made of PP fibers and natural fibers into a lower pre-heating press(11) then pressing an upper pre-heating press(10) by 30-100ton pressure for 1-2 minutes; introducing EPP foam(3) onto top of the pre-heated can-board(2) and transferring it to molds(20,21) then laminating a pair of cover materials on top and bottom of the can-board(2,2a); and pressing the upper mold(20) by 1-3kg/cm¬2 pressure for 1-2 minutes until temperature of the laminated material in the molds(20,21) reaches 25-35 deg.C.

Description

A sunshade for car and the manufacturing method of the same

The present invention relates to a sun shade for automobiles and a method for manufacturing the same, and more particularly, by mixing polypropylene (hereinafter referred to as 'PP') fibers and natural fibers (shemp, hemp, flax, jute, ramie grass, etc.) The plate-shaped board (hereinafter referred to as 'can board') and foamed polypropylene (hereinafter referred to as 'EPP') foam is thermally pressed and the side sections and edges are neatly processed, so the surface appearance is high and the strength is high. Also, when the bracket is combined with the bracket, the bracket is melted by frictional heat using the vibration gluer, and no adhesive parts are required. No additional process is required to reduce the cost and to make the surface of the product beautiful. It relates to a shade and a manufacturing method thereof.

In general, the sun shade is mounted on the roof panel, which is the upper part of the windshield in front of the driver's seat and the passenger seat, so that the driver and the passenger of the passenger seat can be driven from the direct sunlight of the sun that enters the interior of the vehicle through the windshield while driving or stopping. A sunshade for maintaining the front view securely, and the sunshade is provided with a holder for inserting a pass of a toll road, and biaxially so as to block the sun rays entering the windshield and the side window. It also rotates, and the sunscreen that blocks the sun's rays from the rear window of the car is also commonly called sunshade.

The conventional sun shade is composed of a hard substrate and a soft skin paper, and the material is mainly a polypropylene (PP: polypropylene), polyethylene (PE: polyethylene), ABS (ABS), wood fiber (wood fiber) , Wood stock, resin felt, etc. in the mat (mat) state, and the upper surface of the mat is a polyvinyl chloride (PVC) film, polyethylene foam (PE foam) or non-woven fabric such as the skin paper As a result of having a laminated structure, the thickness was formed thick while the strength was weak.

And when the sun shade is mounted on the car, the bracket is attached to the sun shade to be mounted on the fixed frame, and the screw is attached to the sun shade and the bracket by piercing to connect the bracket to the sun shade. Since the screw holes for riveting should be formed, the number of working hours is increased, and when the bracket is fastened to the sun shade using an adhesive, there is a problem in that manufacturing costs are increased because more adhesive parts are needed.

The present invention is to solve the above problems, the side boards and edges of the can board and EPP foam prepared by mixing PP fibers and natural fibers (shemp, hemp, flax, jute, ramie grass, etc.) The surface appearance is good and the strength is high, and when the bracket is combined with the bracket, the bracket is melted and melted by frictional heat using a vibration bonding machine. An object of the present invention is to provide a sun shade for an automobile and a method for manufacturing the same, which can beautifully mold a product surface.

In order to solve the above technical problem, the present invention inserts a pair of canboards on the lower preheating press, presses the preheating press at a pressure of 30 to 100 to preheat for 1 to 2 minutes, and the preheated side The EPP foam is inserted into the upper layer of the canboard, and then transferred to the molding die. The transfer step of laminating the EPP foam is located in the middle of the canboard and the outer skin material is located outside, and the temperature of the laminated material transferred to the molding mold is The molding step is pressed for 1 to 2 minutes by pressing the molding mold at a pressure of 1 to 3 kg / cm 2 until it reaches 25 to 35 ° C., and the sun shade passed through the molding step is transferred to the vibrating adhesive to move the bracket to the side of the sun shade. Mounted on, the upper vibrating adhesive is characterized in that it is manufactured through an adhesive step of vibrating from side to side for 4 seconds while pressing at a pressure of 60 ~ 80kg / ㎠.

1 is a process chart showing a method for manufacturing a sun shade for an automobile according to an embodiment of the present invention.

Figure 2 is a flow chart illustrating a method of manufacturing a sun shade for an automobile according to an embodiment of the present invention.

Figure 3 is a process diagram showing a method of manufacturing a sun shade for an automobile according to another embodiment of the present invention.

Figure 4 is a flow chart illustrating a method of manufacturing a sun shade for a vehicle according to another embodiment of the present invention.

Figure 5 is an exploded perspective view showing a coupling state of the sun shade and bracket for a vehicle according to another embodiment of the present invention.

6 is a cross-sectional view taken along the line AA ′ of FIG. 5.

<Explanation of symbols for main parts of drawing>

1: sun shade 2, 2a: can board

3: foamed polypropylene foam 4, 4a: skin material

5: Bracket 6: Edge

10, 11: preheating press 20, 21: molding mold

30, 31: vibration bonding machine

Hereinafter, the sun shade and the manufacturing method of the present invention will be described with reference to FIGS. 1 to 6.

1 is a process chart showing a method for manufacturing a sun shade for a vehicle according to an embodiment of the present invention, Figure 2 is a flow chart showing a method for manufacturing a sun shade for a vehicle according to an embodiment of the present invention, Figure 3 Is a process chart showing a method for manufacturing a sun shade for an automobile according to another embodiment of the present invention.

In the sun shade for automobile according to the present invention, EPP foam 3 is located between can boards 2 and 2a manufactured by mixing PP fibers and natural fibers, and then opening, carding, and needle work. The upper and lower sides of the 2a have a 5-layer structure in which the skin materials 4 and 4a are laminated and thermo-compression molded.

The can board (2) (2a) is first mixed with 45 to 55% by weight of PP fiber and 45 to 55% by weight of natural fiber prepared by cutting to a length of 70 ~ 90mm, the opening of the fiber to loosen the fiber It is manufactured by cutting the mat produced through the work, the carding work for stacking the fibers coming out of the other layer, and the needle work for combining the fibers stacked in multiple layers using a needling machine. As the natural fiber, one kind of natural fiber selected from hemp, hemp, flax, jute, and ramie fiber may be used, and preferably, natural fiber having excellent strength and durability and abundant yield is used.

The PP fiber is melted when forming a substrate, and serves to bind the natural fibers and impart moldability of the embedded substrate, and the natural fiber is responsible for the strength, stiffness and impact resistance of the embedded substrate. The higher this, the higher the strength and rigidity, but the poor formability.

In order to manufacture the EPP foam (3), the EPP is sufficiently softened using saturated steam, which is a fruit entity, to expand the EPP, to bead the beads, and to foam the EPP to mature for a certain period of time before drying the foam granules. The shape of the mold can be obtained by filling the mold to obtain a shape, block or tubular product and applying steam to the foam granules by swelling the foam granules by expansion of the foaming agent and the air and swelling the foam grain particles to separate them from the mold. The EPP foam thus formed forms the EPP foam 3 by cutting it into a plate or sheet state using a band saw, knife or heating wire.

The aging of the foamed particles as described above is matured so that the air in the atmosphere penetrates into the foamed particles and gradually becomes the same as the atmospheric pressure when the foaming agent in the particles is released to the outside immediately after the foaming and the interior is decompressed. The reason why the pressure inside the foam particles is increased is that the rate of air penetration into the foam granules is faster than the outflow of the blowing agent and water. Therefore, when molding without sufficiently aging, since the internal pressure is a reduced pressure state, the internal pressure does not endure, and it contracts and does not recover to its original state even if the external force is removed. As a result, the aging of the foam particles is intended to reduce the remaining blowing agent in the blowing agent by volatilizing for a period of time.

Hereinafter, a method of manufacturing a sun shade for an automobile using the can board (2) (2a) and the EPP foam (3) manufactured as described above is as follows.

First, a pair of can boards (2) (2a) prepared by mixing 45-55% by weight of PP fiber with 45-55% by weight of one kind of natural fiber selected from hemp, hemp, flax, jute and ramie grass is preheated Inserted into (11), and presses the preheating press 10 to a pressure of 30 ~ 100ton to perform a preheating step 41 to preheat 1 to 2 minutes. At this time, the preheating presses 10 and 11 maintain the temperature of 190 ~ 210 ℃, the thickness of the can board (2) (2a) before the pressure preheating maintains 10 ~ 20mm and after the pressure preheating process Is transformed into a sheet of flexible pressed to 2mm, because the PP fiber of the can board (2) (2a) is a thermoplastic material is transferred heat from the preheating press (10) (11) can be easily deformed to be.

And the can board (2) (2a) is crimped preheating in the crimping preheating step 41 is a plate of 150 × 200cm, the pressing force is 30 ~ 100ton with respect to the total area, the force per unit area is 1 ~ 3kg / ㎠, which The design criterion in the compression molding step 43, which will be described later, is based on the pressure received per unit area of 2 kg / cm 3, and when designed at a pressure of 2 kg / cm 3 per unit area, a pressure of 60 tons is applied to the total area. Since it is necessary, leave a margin of pressure and press it at a pressure of 30 ~ 100ton.

In addition, when the temperature of the preheating press is less than 165 ℃, the molding is not performed properly in the compression molding step 43, in the range of 166 ~ 190 ℃ becomes a fluff smell of natural fibers, when the temperature of 245 ℃ or more PP and natural fibers It is impossible to mold the desired product due to the change of physical properties, and in the range of 200 ~ 244 ℃, the natural fiber burns badly and burns, so in order to obtain a good quality product, it needs to be preheated in the temperature range of 190 ~ 210 ℃. It is preferable.

Then, the EPP foam 3 is inserted into the upper surface of the canboard 2 preheated through the crimping preheating step 41, and then transferred to the molding dies 20 and 21 to transfer the canboard 2 ( The EPP foam 3 is positioned between 2a), and a transfer lamination step 42 for laminating the skin 4 and 4a is positioned above and below the can board 2 and 2a. Ash (4) (4a) uses soft polyvinyl chloride (PVC) or thermoplastic olefin elastomer (TPO) sheets or polypropylene or polyester fabrics or nonwovens.

In the transfer lamination step 42, the can board (2) (2a) is present as a flexible sheet material, so deformation may occur, and thus the canboard (2) (2a) requires attention to the transfer process. In the crimping preheating step 41, the preheating presses 10 and 11 have a temperature of 190 ° C. to 210 ° C.

The upper mold 20 is pressurized at a pressure of 1 to 3 kg / cm 2 until the temperature of the stacked laminated material is transferred to the molds 20 and 21 through the transfer lamination step 42 to 25 to 35 ° C. Through the compression molding step 43 for 1 to 2 minutes by pressing to form the sun shade for automobile is completed.

Cooling water pipes 20b and 21b are installed in the upper and lower molding molds 20 and 21, respectively, so that the cooling water is circulated, and the can boards 2 and 2a, which are thermoplastics, are compressed and preheated in step 41. It is melted through and then hardened by cooling by cooling water circulated into the molding dies 20 and 21, so that the canboard 2 is in contact with the canboard 2 and 2a up and down the EPP foam 3. (2a) while the PP fiber is cured and adhered to the EPP foam (3) and the skin material (4) (4a), in this process the air discharge nozzle (20a) (upper and lower mold 20, 21) 21a) is formed and presses for 1-2 minutes until the temperature of the base material reaches 25 ~ 35 ℃ while preventing the defect of the surface of the product caused by air by blowing out air existing in the mold during press molding. Is done.

In addition, the upper mold 20 has a sharp side formed in contact with the lower mold 21 as shown in Figure 3 to cut off the excess of the material inserted into the mold 20, 21 neatly As the compression molding step 43, an EPP foam 3 is positioned as a cushioning material in an intermediate portion, and a pair of can boards 2 and 2a are stacked on top and bottom of the EPP foam 3, and the can board. The upper and lower portions of (2) and (2a) may be laminated so that a pair of skin materials 4 and 4a may be stacked to form an edge portion 6 which seals both ends of a five-layer structure.

The sun shade 1 for automobile manufactured as described above is used to be coupled to a fixed frame when applied to a car, and the bracket 5 is coupled to the fixed frame in order to facilitate the movement of the sun shade 1. It will be coupled, as described below with reference to the accompanying drawings for the manufacturing method of the sun shade for the vehicle made by combining the sun shade 1 and the bracket 5 as another embodiment according to the present invention.

4 is a flowchart illustrating a method of manufacturing a sun shade for an automobile according to another embodiment of the present invention, and FIG. 5 is an exploded perspective view showing a coupling state of the sun shade and bracket for an automobile according to another embodiment of the present invention. 6 is a cross-sectional view taken along the line AA ′ of FIG. 5.

As shown in FIG. 4, the sun shade 1 manufactured through the pressing molding step 43 is transferred to the lower vibrating glue 31 and mounted, and the bracket 5 is transferred to the upper vibrating glue 30. After mounting, the sunshade (1) of the state in which the bracket (5) is adhered through the vibration bonding step 44 of pressing the upper vibration bonding machine 30 at a pressure of 60 ~ 80kg / ㎠ to vibrate left and right for 4 seconds Is done.

At this time, the lower vibration gluer 31 moves the bracket 5 while the upper vibration gluer 30 moves from side to side in a fixed state, and at this time, frictional heat generated by friction between the bracket 5 and the sunshade 1 Due to the melting of the bracket (5) in the contact surface with the sun shade (1) due to the adhesive to the sun shade (1), so as to receive the vibration force of the upper vibration bonding machine 30 to 60 to 80kg / ㎠ pressure for 4 seconds do.

If the vibration width of the upper vibration bonding device 30 is narrow, it is difficult to generate sufficient frictional heat, and if it becomes too wide, the surface of the skin 4 may be damaged and the beauty of the surface of the sun shade 1 may be lowered, so the vibration width is 0.8. The mm must be maintained, and the frequency can be executed about 100 to 500 times per second, preferably 250 times per second.

As described above, the sun shade for automobiles is formed by attaching the bracket 5 to the side surface of the sun shade 1 as shown in FIGS. 5 and 6, and in the accompanying drawings, only one side is shown for convenience of description. The bracket 5 is also bonded to the opposite side shown in the figure in the same shape, and the edge portion 6 is also formed in the same shape on the opposite side shown in the figure through the pressing molding step 43.

As described above, the automotive sunshade of the present invention and the method of manufacturing the plate board made of a mixture of polypropylene fiber and natural fiber and foamed polypropylene foam are thermally compressed, and at the same time the side sections and edges are neatly processed. Good surface appearance and high strength. Also, when the bracket is combined with the bracket, the bracket is melted and melted by frictional heat, so it is not necessary to attach any additional materials. There is an effect that can be molded.

Claims (3)

Foam polypropylene (EPP) foam (3) is located as a cushion in the middle portion, 45 to 55% by weight of polypropylene (PP) fibers selected from the hemp, hemp, flax, jute, ramie grass up and down the EPP foam (3) A pair of canboards (2) (2a) manufactured by mixing with 45 to 55% by weight of one type of natural fiber is laminated, and a pair of skin materials (4) above and below the canboard (2) (2a). (4a) is a laminated five-layer structure, the sun shade for the automobile, characterized in that the edge portion (6) is formed sealed at both ends of the five-layer structure. A pair of can boards prepared by mixing 45-55 wt% of polypropylene (PP) fibers on the lower preheating press 11 with 45-55 wt% of one kind of natural fibers selected from hemp, hemp, flax, jute and ramie grass (2) (2a) is inserted, and the preheating step (41) for pressing the preheating press 10 at a pressure of 30 ~ 100ton and preheating for 1 to 2 minutes, The EPP foam 3 is inserted into an upper layer of the preheated canboard 2, and then transferred to a molding mold 20 and 21 to place the EPP foam 3 between the canboards 2 and 2a. And a transfer lamination step 42 for laminating a pair of skin materials 4 and 4a on top and bottom of the canboard 2 and 2a, The upper mold 20 is pressed at a pressure of 1 to 3 kg / cm 2 and molded for 1 to 2 minutes until the temperature of the laminated materials transferred to the molding molds 20 and 21 reaches 25 to 35 ° C. Sunshade manufacturing method for cars, characterized in that the manufacturing through the compression molding step (43). The method of claim 2, wherein the sunshade (1) manufactured through the compression molding step 43 is transported and mounted to the lower vibration gluer (31), the bracket (5) is transported and mounted to the upper vibration gluer (30) And, the sunshade manufacturing method for an automobile, characterized in that it is manufactured through a vibration bonding step 44 for vibrating from side to side for 4 seconds while pressing the upper vibration adhesive (30) at a pressure of 60 ~ 80kg / ㎠.