JP4660838B2 - Molding method for extruded products such as trim - Google Patents

Description

  The present invention is a molded product that holds and holds a flange or the like located in an opening of a vehicle body such as an automobile door or trunk, and has a synthetic resin core inside thereof, and holds a flange such as a trim or a weather strip. The present invention relates to a method for forming an extruded product such as a trim that variably extrudes a holding piece.

Conventionally, a flange at each opening of a vehicle body such as an automobile of this type is generally mounted and held on an opposing holding piece provided on the inner surface side of a trim or the like having a synthetic resin core material having a substantially U-shaped cross section. ing.
However, depending on the location of the flange portion at each location, a plurality of panels are overlapped, or there are portions where the flange portion is configured as a very thick portion.
Accordingly, since the mounting of the flange portion is remarkably deteriorated, it is generally necessary to partially cut the holding piece protruding after the extrusion molding, and it takes a troublesome labor and time for processing again. It was a general disadvantage.

In order to solve the above-mentioned conventional problems, the main object of the present invention is to provide a second extrusion molding machine while the synthetic resin core formed by the first extrusion molding machine is running. Further, the outer peripheral coating layer and the inner peripheral coating layer are applied to the inner and outer circumferences of the synthetic resin core material by a second mold die, and a fixed holding piece and a variable holding piece are provided on the inner peripheral coating layer. And the tip of the variable holding piece of the inner peripheral coating layer is cooled by the operation of a variable jig when the extruded product is in a softened state after passing through the second mold die. Bending upward to widen the gap, and even when there are multiple flange panels or thick flanges, it can be inserted sufficiently and the extrusion molded product such as a trim can be securely clamped. A molding method is provided.
Furthermore, a second fixed holding piece, which is shorter than the variable holding piece, is arranged in parallel below the variable holding piece provided on the inner peripheral coating layer, so that the holding force can be sufficiently increased even when the flange is thick. It is what I did.

According to the method for molding an extruded product such as a trim according to the present invention, the synthetic resin core material having a substantially U-shaped cross section extruded by the first die is formed by the second extruder and the second die. An outer peripheral coating layer made of a thermoplastic elastomer and an inner peripheral coating layer are formed on the inner and outer peripheries of the synthetic resin core. Corresponding first fixed holding pieces and variable holding pieces are formed on the inner peripheral coating layer. Thereafter, when the soft jig is in the softened state after passing through the second die, the variable jig is operated up and down to cool and press only the variable holding piece upward to increase the distance between the first fixed holding piece and the gap. A deformation holding piece is formed.
Further, a second fixed holding piece having a shorter length than the variable holding piece is arranged below the variable holding piece provided on the inner peripheral coating layer, and the variable holding piece is passed through the second die. And the front-end | tip of each of this 2nd fixed holding piece deform | transforms upwards, Then, it cools and molds.

According to the method of molding an extruded product such as a trim according to the present invention, in the section where the flange panel of the vehicle body opening of the automobile is superposed into a plurality of thick portions as in the prior art, all the corresponding holding pieces are Since the pinching is not reliable, after the extrusion molding, each holding piece was partially cut to cope with it. Therefore, there is an effect of solving the drawbacks related to the labor and time of the second operation.
In addition, the outer peripheral coating layer and the inner peripheral coating layer are simultaneously applied to the synthetic resin core material in the second mold die, and the first fixed holding piece and the variable holding are opposed to the inner peripheral coating layer. The effect that the pieces can be easily integrated, and the variable holding piece located on one side, when the section of the flange panel overlaps into a plurality and becomes thick, results in the extrusion passing through the second die. Since the variable holding piece is pressed upward while being cooled by the operation of the variable jig when the molded product is in a softened state, the gap is widened, so that the thick portion of the flange can be easily and firmly inserted.
Furthermore, since the second fixed holding piece having a shorter length than the variable holding piece is arranged below the variable holding piece provided on the inner peripheral coating layer, the short holding piece portion of the lower second fixed holding piece is There is an effect that the side surface of the thick flange can be reinforced and held in a pressed state.

According to the method of molding an extruded product such as a trim according to the present invention, an extruded product to be attached to each flange of a vehicle body door, a trunk room or the like has an outer peripheral coating layer on the entire outer periphery of a synthetic resin core material having a substantially U-shaped cross section. An inner peripheral coating layer is applied, and a first fixed holding piece and a variable holding piece corresponding to the inner peripheral coating layer are formed. When the flange is thin, it can be inserted and used as it is, but in the section where the flange is thick, a variable jig is used when the corresponding one of the variable holding pieces is softened. By pressing upward while cooling, the gap is enlarged, so that it is firmly inserted into the large gap formed even by the thick flange.
Further, even when the variable holding piece was pressed upward by the second fixed holding piece having a short length arranged in parallel below one of the opposing variable holding pieces provided on the inner peripheral coating layer, the insertion was performed. The tip of the second fixed holding piece is pressed against the side surface of the flange and can be held firmly.

  Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an overall bevel view of an extruded product (1) such as a trim, and a predetermined interval position of an internal variable holding piece (7). The state which formed the deformation | transformation holding piece (8) is shown. FIG. 2 shows a cross section taken along line AA of FIG. As shown in FIG. 8, the extruded product (1) is sent to the first mold die (17) by the first extrusion molding machine (16) infused with a hard synthetic resin, and the longitudinal direction of the substantially U-shaped section is shown. A synthetic resin core material (2) is molded. Thereafter, the synthetic resin core material (2) travels to the excision machine (15) through the first cooling water tank (18) and the extrusion roller (19) while traveling. The excision machine (15) forms cut portions of various shapes that facilitate bending on both side surfaces of the synthetic resin core material (2) having a substantially U-shaped cross section, and the synthetic resin core material (2) It is molded into a fishbone shape (fishbone shape).

Next, the synthetic resin core material (2) is moved to the outer periphery and the inner periphery while passing through the second mold die (21) by the thermoplastic elastomer injected into the second extrusion molding machine (20) while running. An outer peripheral coating layer (3) and an inner peripheral coating layer (5) are applied.
As shown in FIG. 2, a decorative lip (11) integrated on the outer periphery and a hollow seal (12) on the outer periphery are formed on the outer covering layer (3).
The inner peripheral coating layer (5) has a first fixed holding piece (6) protruding on one side surface, and a variable holding piece (7) protruding from the other side surface at a corresponding position. In addition, a plurality of the first fixed holding pieces (6) are provided as needed.

  The embodiment shown in FIG. 3 shows a cross-sectional view taken along the line BB of FIG. 1, shows a predetermined section when the flange is thick, and deforms and holds the variable holding piece (7) up and down. This represents the state (8). 4 shows a first fixed holding piece (6) at a position facing the deformation holding piece (8) in a state where a thick flange (10) in which a plurality of panels are overlapped is inserted. The state which clamped the flange (10) is represented.

Next, the embodiment shown in FIG. 5 is the one shown in claim 2, in which the length of the variable holding piece (7) is lower than the variable holding piece (7) provided on the inner peripheral coating layer (5). A short second fixed holding piece (9) is shown.
FIG. 6 shows an upper deformable holding piece (7) and a lower lower second fixed holding piece (9) shown in FIG. 5 which are deformed upward, and a thick flange (10) is provided. It shows the inserted state.

The embodiment shown in FIG. 7 operates the variable jig (13) to the left and right when the extruded product (1) covered while passing through the second die (21) shown in FIG. As shown in FIG. 1, the tip of the variable holding piece (7) is bent and deformed upward like the deformation holding piece (8), and the thick flange (10) is inserted and clamped. Then, after cooling by the 2nd cooling water tank (22), it cut | disconnects to desired length and becomes a finished product (23).
Further, the mounting position of the variable jig (13) may be set in the second cooling water tank (22) or in the tip of the second cooling water tank (22) as shown in FIG. The variable jig (13) requires appropriate cooling.

Next, the materials used in the present invention will be described. As the hard synthetic resin forming the synthetic resin core material having a substantially U-shaped cross section, olefinic resins such as polypropylene and polyethylene, styrene resins, nylon resins, polyester resins Alternatively, a mixed synthetic resin in which powders such as talc and glass fiber are mixed with these hard synthetic resins is used to increase the rigidity and reduce the linear expansion coefficient. As a mixed synthetic resin preferably used, 60 to 80% by weight of polypropylene resin is mixed with 20 to 40% by weight of talc powder, and the linear expansion coefficient is reduced by about 30 to 70%. .
Furthermore, as the thermoplastic elastomer forming each coating layer and each holding piece, an olefin thermoplastic elastomer or a styrene thermoplastic elastomer is used.

  It is the perspective view which partially disclosed the variable holding piece of the longitudinal direction of the extrusion molded product of this invention as the deformation | transformation holding piece.   FIG. 2 is a cross-sectional view taken along line 1A-A of the present invention.   It is sectional drawing of the state which deform | transformed the variable holding piece in the case of the thick flange in sectional drawing of FIG. 1B-B of this invention into the deformation | transformation holding piece.   It is sectional drawing when the flange when the panel of this invention superposed | polymerized similarly is inserted.   It is sectional drawing which provided the 2nd short fixed holding piece in two steps under the variable holding piece provided in the inner peripheral coating layer of this invention.   It is sectional drawing of the state which inserted the thick flange of this invention similarly, and the two-stage holding piece deform | transformed.   It is a side view of the state which pressed the variable holding piece of the inner surface of the extrusion molded product of this invention with the variable jig.   It is the side view which partly lacked which shows the formation process to the finished product of the molded product which similarly installed the variable jig of this invention inside the water tank.   It is the side view which a part of which showed the formation process to the finished product of the molded product which installed the variable jig of the present invention in the tip of a water tank.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Extrusion molded product 2 Synthetic resin core material 3 Outer periphery coating layer 5 Inner periphery coating layer 6 1st fixed holding piece 7 Variable holding piece 8 Deformation holding piece 9 2nd fixed holding piece 10 Flange 11 Makeup lip 12 Hollow seal 13 Variable jig 15 Cutting Machine 16 First Extruder 17 First Mold Die 18 First Cooling Water Tank 19 Extruding Roller 20 Second Extruder 21 Second Mold Die 22 Second Cooling Water Tank 23 Finished Product

Claims (1)

In a molding method of an extrusion molded product such as a trim to be mounted on a flange (10) of a vehicle body opening such as an automobile door or trunk, the synthetic resin core material (2) includes a first extrusion molding machine (16) and a first gold. It is formed into a substantially U-shaped cross section through the first cooling water tank (18) and the extrusion roller (19) while running on the die (17), and then proceeds to the cutting machine (15) to proceed to the synthetic resin core (2 ) Are formed on both side surfaces, and then the synthetic resin core material (2) enters the second mold die (21) and the second extrusion molding machine (20) uses the synthetic resin core material. The outer peripheral coating layer (3) and the inner peripheral coating layer (5) are simultaneously applied to the inner and outer circumferences of (2) . The inner peripheral covering layer (5) has a plurality of first fixed holding pieces (6) (6) on one side, and the inner peripheral covering layer (5) has first fixed holding pieces (6) (6). ) A single variable holding piece (7) having a longer length and thickness is formed, and after passing through the second mold die (21) , the thermoplastic elastomer is softened from the second extrusion molding machine (20). deformation of singular and pressed upward while cooling said variable holding piece (7) of the inner peripheral coating layer (5) by operation of the variable jig (13) to increase the insertion clearance of the flange (10) when the state A method for forming an extrusion-molded product such as a trim, wherein the holding piece (8) is formed.

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