JP5179272B2 - Extruded article having an irregular cross-sectional shape and manufacturing method thereof - Google Patents

Description

  The present invention relates to a long extruded product, and more particularly to a long extruded product having an irregular cross-sectional shape such as a glass run channel mounted on a vehicle body and a method for manufacturing the same.

A long extruded product (also referred to as molding) obtained by extruding a heated and melted polymer material is used in various applications. For example, roof moldings, weather strips, glass run channels (also simply referred to as glass runs), and the like are examples of extrusion molded products that are mounted on a vehicle body such as an automobile.
As one form of this type of extruded product, a simple shape in which the cross-sectional shape (that is, the cross-sectional shape that appears when the extruded product is cut in the direction orthogonal to the extrusion direction) is bilaterally (vertical) symmetrical Rather, there is an extruded product having a so-called irregular cross-sectional shape characterized by a shape in which the outer shape is left-right (up and down) asymmetric and / or a thickness is different (biased) in each of the left and right (up and down) portions. .
For example, a glass run channel that is mounted in a groove of a window frame of a vehicle body (a window frame provided on a door panel is also referred to as a door frame) and guides the raising and lowering of the window plate is generally disposed in the groove. The shape and thickness of the vehicle inner side wall portion that extends from one end of the bottom wall portion and is arranged inside the vehicle body and the vehicle outer side wall portion that extends from the other end of the bottom wall portion and is arranged outside the vehicle body are different. This is a typical example of an extruded product having the above-mentioned irregular cross-sectional shape. Patent Document 1 describes an example of a conventional glass run (glass run channel) having such an irregular cross-sectional shape.

JP 2000-185559 A

By the way, as a problem of a long extruded product having such an irregular cross-sectional shape, there is a curve (warp) in an undesired direction after extrusion.
That is, in this type of extrusion-molded product, in an extrusion-molded product molded from a polymer molding material containing a crystalline resin component, the cross-sectional shape is constant over the longitudinal direction, and the reference line crossing the center of the cross-section ( (Hereinafter also referred to as “aerial straight line reference line”) as a boundary, both sides of which are the first part and the second part, respectively, and one of the thicknesses is thicker than the other (here, the second part is greater than the first part). It is assumed that the part is thick.) Due to the difference in the cooling rate after extrusion, a difference in crystallinity occurs between the first part and the second part. That is, since the relatively thick second part is cooled at a slower rate than the relatively thin first part, the crystallinity of the resin component is higher than that of the first part. Therefore, the extrudate formed of the first part and the second part is contracted more greatly than the first part in the second part having a higher degree of crystallinity when cooled to room temperature after extrusion. As a result, bending (warping) occurs along the longitudinal direction. When an extruded product that has undergone such bending or warping is to be cut correctly to a predetermined length in the cutting process after cooling, it is necessary to forcibly return the curved extruded product to a straight line. As a result, workability deteriorates. In addition, the incidence of defective products that are not cut with the correct dimensions increases, which is not preferable.

  Therefore, the present invention was created in order to solve the above-mentioned conventional problems of long extruded products having such irregular cross-sectional shapes, and an extrusion formed using a polymer material containing a crystalline resin. To provide an extruded product having a deformed cross-sectional shape that is capable of realizing that it is a molded product that does not bend in an unintended direction (no warpage occurs) even when cooled to near room temperature after extrusion, and a method for producing the same. Objective.

In order to achieve the above object, the present invention provides an extruded product having an irregular cross-sectional shape.
That is, the extruded product of the present invention is a long extruded product having an irregular cross-sectional shape which is extruded from a thermoplastic polymer material in a heated and melted state and cooled and solidified. It is a product.
The extrusion-molded article of the present invention includes a main body portion that is formed in the longitudinal direction with a predetermined cross-sectional shape, and a reinforcing portion that is formed in a part of the main body portion in the longitudinal direction.
In the extruded product of the present invention, the main body portion is a first polymer material in which at least a crystalline resin and an olefin rubber (typically EPDM) are mixed at a predetermined first mixing ratio, It is formed from a first polymer material that exhibits a predetermined first hardness when solidified, while the reinforcing portion includes at least a crystalline resin and an olefinic rubber (typically EPDM) in the first mixing ratio. A second polymer material mixed at a second mixing ratio in which the mixing ratio of the crystalline resin is higher than the second polymer material, and when solidified, the second polymer material exhibits a predetermined second hardness exceeding the first hardness. ing.
Further, the extrusion molded article of the present invention, the body portion, the cross-sectional shape in the boundary an imaginary straight reference line across the center of the cross section is asymmetric to each other (variant) continuously integrally with the reference line portion It consists of a first part and a second part. The first portion has a first thickness portion that is at least a portion of the first portion and has a maximum thickness in the first portion. On the other hand, the second portion has a second thickness portion that is at least a portion of the second portion and has a maximum thickness in the second portion, and the second thickness The portion is formed thicker than the first thickness portion. Further, the crystallinity of the second thickness portion of the second portion after cooling and solidification is formed to be higher than the crystallinity of the first thickness portion of the first portion.
In the extruded product of the present invention, the reinforcing portion is formed in a state where it is fused and integrated with a part of the surface of the second portion of the main body portion, and further, the reinforcing portion after cooling and solidification. Is formed to be lower than the crystallinity of the second thickness portion of the second portion of the main body.

According to the extruded product of the present invention having such a configuration, by having the second thickness portion, crystallization progresses more than the first portion (first thickness portion), and the shrinkage rate is relatively large. A reinforcing portion having a lower crystallinity than the second thickness portion (typically, the entire second portion) of the second portion is formed (arranged) on the surface of the second portion. And Further, the second polymer material has higher hardness and higher rigidity when solidified than the first polymer material.
For this reason, it is possible to prevent the occurrence of biased excessive shrinkage of the second portion after extrusion. Specifically, in the extruded product of the present invention, since the reinforcing portion is formed on the surface of the second portion, the reinforcing portion is cooled earlier than the thick second portion in the cooling step after extrusion. It is possible to suppress an increase in crystallinity (that is, to pass through a temperature range where crystallization of the crystalline resin component in the polymer material proceeds in a short time and cool to a room temperature range). Thereby, in the extrusion molded product of the present invention, the contraction of the second portion of the main body is limited by the presence of the reinforcing portion, and as a result, the linearity is maintained in the longitudinal direction. In other words, the extruded product having the irregular cross-sectional shape of the present invention having the first part and the second part having the above-mentioned properties does not bend in the unintended direction even in the state cooled to the room temperature region, and is in the longitudinal direction. Linearity can be maintained.
Therefore, according to the extrusion molded product of the present invention, it is possible to prevent the occurrence of problems associated with bending (warping) during processing after extrusion molding or during storage.
Moreover, as for the extrusion molded product of this invention, as mentioned above, both the main-body part and the reinforcement part are formed from the same polymer material. For this reason, when it becomes unnecessary (or when it is unused and discarded due to various circumstances), it can be easily realized to be reused by pulverizing the entire extruded product.

According to a preferred embodiment of the extruded article of the present invention, a glass run mounted along a window frame of a vehicle body (typically, a vehicle body of a car) for guiding a window plate as described in claim 2. The body is an extruded product formed as a channel, and the main body is formed from a bottom wall disposed at a position facing the outer peripheral edge of the window plate, and a vehicle inner end in the width direction of the bottom wall. A vehicle inner side wall portion protruding in the direction and a vehicle outer side wall portion protruding in the one direction from the vehicle outer end portion in the width direction of the bottom wall portion, and the bottom in a state before being attached to the window frame. It is extrusion-molded into a substantially U-shaped cross-sectional shape composed of a wall portion and both side wall portions. One of the vehicle inner side wall and the vehicle outer side wall is included in the first part, the other side wall is included in the second part, and the reinforcing part is the second part. It is formed in a part of surface of the side wall part included by this.
According to the extrusion molded product formed as a glass run channel for a vehicle body having such a configuration, the linearity in the longitudinal direction is maintained after the extrusion molding (during the cooling process and thereafter), so that it is accurate without deteriorating workability. It can be easily mounted at the correct mounting position of the window frame with various dimensions.

The extrusion molded product formed as a glass run channel for a vehicle body according to a further preferred aspect is characterized in that, as described in claim 3, the bottom wall portion is formed at the protruding tip of each of the vehicle inner side wall portion and the vehicle outer side wall portion. A vehicle inner side seal lip and a vehicle outer side seal lip extending in a folded shape with a space between the opposite side walls and facing each other are formed from the first polymer material. The surface of the vehicle inner side seal lip and the vehicle outer side seal lip and / or the portion of the bottom wall where the window plate can come into contact has a friction coefficient higher than that of the main body formed from the first polymer material. A small low-friction portion is formed, wherein the low-friction portion is formed of the same second polymer material as the reinforcing portion.
According to the extrusion molded product formed as a glass run channel for a vehicle body having such a configuration, in addition to the effect exhibited by the glass run channel for vehicle body according to claim 2, the low friction portion and the reinforcing portion are formed of the same polymer material. As a result, it is possible to reduce the types of materials used (lead to a reduction in material costs) and to simplify the manufacturing process (for example, to reduce the number of extruders used), resulting in a reduction in cost. it can.

The extrusion molded product formed as a glass run channel for a vehicle body according to a further preferred aspect is characterized in that a root portion corresponding to the folded portion of the vehicle inner side seal lip and the vehicle outer side seal lip is the first portion as described in claim 4. The polymer material is exposed along the longitudinal direction with a constant width.
According to the extrusion molded product formed as a glass run channel for a vehicle body having such a structure, in addition to the effect exhibited by the glass run channel for vehicle body according to claim 3, the low friction part and the reinforcing part are not formed at the root part. It is not affected by the low friction part and the reinforcing part exhibiting the second hardness, and does not hinder the bendability of the seal lip. Further, cracks and the like are prevented from occurring in the root portion. Therefore, a glass run channel with good performance can be provided.

Another aspect preferable as the extrusion-molded article of the present invention is, as described in claim 5, a portion that can come into contact with the attached body when attached to a predetermined attached body (for example, a window frame of a vehicle body). The first polymer material is exposed along the longitudinal direction with a constant width.
According to the extruded product having such a configuration, since the reinforcing portion is not formed at a portion that can come into contact with the attached body, direct contact between the attached body and the reinforcing portion exhibiting the second hardness is avoided, and the contact is made. There is a further effect that it is possible to prevent adverse effects associated with the above, for example, the generation of abnormal noise due to contact.

According to another preferred embodiment of the extruded product of the present invention, as described in claim 6, the joint portion between the second portion and the reinforcing portion is a concave-convex fitting when viewed from the cross section of the extruded product. As described above, the reinforcing portion having a convex and / or concave joint surface corresponding to the concave and / or convex shape is formed on the concave and / or convex surface of the second portion. And
According to the extruded product having such a configuration, the joint surface between the second portion of the main body portion and the reinforcing portion is not a simple flat surface (a simple straight boundary surface as viewed from the cross section) but a fitting shape having irregularities. A joining surface (an uneven surface as viewed from the cross section) is formed. Thereby, the joining area of a 2nd part and a reinforcement part increases, and also there exists the further effect that the 2nd part of a main-body part and a reinforcement part are joined by high joining strength by mechanical strength.

According to another preferred embodiment of the extruded product of the present invention, as described in claim 7, the crystalline resin contained in the first polymer material and the crystalline resin contained in the second polymer material are: All are olefin-based thermoplastic resins.
According to the extruded product having such a configuration, there is an additional effect of improving the recyclability.

Further, the present invention provides a method for suitably producing the extruded product disclosed herein.
That is, according to the method for producing an extruded product of the present invention, a long extruded product having a deformed cross-sectional shape is formed by extruding a thermoplastic polymer material that has been heated and melted. It is a manufacturing method.
In such a manufacturing method of the present invention, the extruded product includes a main body portion formed in a longitudinal direction in a predetermined cross-sectional shape, and a reinforcing portion formed in a part of the main body portion in the longitudinal direction. It is a long extruded product and the following steps:
(1) As a material for molding the main body, a first polymer material in which at least a crystalline resin and an olefin-based rubber are mixed at a predetermined first mixing ratio, which has a predetermined first hardness when solidified. A first polymeric material present;
The material for molding the reinforcing portion is a second polymer material in which at least a crystalline resin and an olefin rubber are mixed at a second mixing ratio in which the mixing ratio of the crystalline resin is higher than the first mixing ratio, A second polymeric material that exhibits a predetermined second hardness that exceeds the first hardness when solidified;
Preparing a process;
(2) A step of obtaining an extruded body having the main body portion and the reinforcing portion having a predetermined cross-sectional shape by coextrusion molding using the first polymer material and the second polymer material in a heated and melted state, The coextruded molded body is
Continuously comprises a first portion and a second portion which is integral with said body portion is fictitious straight reference line asymmetrical to each other cross-sectional shape in the boundary across the center of the cross section the reference line portion,
The first portion has a first thickness portion that is at least a portion of the first portion and has a maximum thickness in the first portion;
The second portion has a second thickness portion that is at least a portion of the second portion and has a maximum thickness in the second portion; and the second thickness portion is the Formed thicker than the first thickness portion, and
The reinforcing portion is formed in a state of being fused and integrated with a part of the surface of the second portion of the main body portion; and (3) cooling the extruded body obtained by the coextrusion molding A step of solidifying, wherein the cooling is such that the crystallinity of the second thickness portion of the second portion after cooling and solidification is higher than the crystallinity of the first thickness portion of the first portion; And the degree of crystallinity of the reinforcing part after cooling and solidification is lower than the degree of crystallinity of the second thickness part of the second part;
Is included.

In the extruded product manufacturing method of the present invention having such a configuration, by having the second thickness portion, crystallization proceeds more than the first portion (first thickness portion), and the shrinkage rate is relatively high. On the surface of the large second part, a reinforcing part characterized by having a lower crystallinity than the second thickness part of the second part (typically, the entire second part) is formed (arranged). To do. Further, the second polymer material has higher hardness and higher rigidity when solidified than the first polymer material.
For this reason, it is possible to prevent occurrence of biased excessive shrinkage of the second portion after extrusion. Specifically, in the extrusion product manufacturing method of the present invention, the reinforcing portion is formed on the surface of the second portion, so that the reinforcing portion is cooled earlier than the thick second portion in the cooling step after extrusion. Thus, the increase in crystallinity is suppressed (that is, a temperature range in which crystallization of the crystalline resin component in the polymer material proceeds is allowed to pass in a short time to cool to the room temperature range).
Thereby, in the extrusion molded article manufacturing method of the present invention, the shrinkage of the second part of the main body part after the extrusion molding (for example, during the cooling step and thereafter) is limited by the presence of the reinforcing part, and as a result, the linearity in the longitudinal direction is obtained. Kept. In other words, the extruded product having a modified cross-sectional shape having the first and second portions having the above properties does not bend in an unintended direction even in a state cooled to the room temperature region, and has linearity in the longitudinal direction. Can be held.
Therefore, according to the method for producing an extruded product of the present invention, it is possible to provide an extruded product that can prevent the occurrence of problems associated with bending (warping) during processing after storage and storage.

According to a preferred embodiment of the method for producing an extruded product of the present invention, as described in claim 9, in the co-extrusion molding step, the heated and molten first polymer material and second polymer material are obtained. Supply to one extrusion mold from each of the different extruders, and extrude a molded body in which the main body part and the reinforcing part of a predetermined cross-sectional shape are integrated from the extrusion port of the mold,
In the solidification step, the molded body extruded from the extrusion port is cooled and solidified by a predetermined cooler.
According to the manufacturing method having such a configuration, an extruded product can be manufactured by a single manufacturing line equipped with an extruder, and thus there is an additional effect that an extruded product having a desired shape can be efficiently manufactured. .

In another preferred embodiment of the method for producing an extruded product according to the present invention, as described in claim 10, a glass run in which the extruded product is mounted along a window frame of a vehicle body to guide a window plate. A channel (ie, a method for producing a glass run channel).
In this manufacturing method, the main body includes a bottom wall disposed at a position facing the outer peripheral edge of the window plate, and a vehicle interior that projects in one direction from a vehicle inner end of the bottom wall in the width direction. A side wall portion and a vehicle outer side wall portion protruding in one direction from a vehicle outer side end portion of the bottom wall portion in the width direction, and one of the vehicle inner side wall portion and the vehicle outer side wall portion. Is included in the first portion, the other side wall portion is included in the second portion, and is substantially U-shaped including the bottom wall portion and both side wall portions in a state before being attached to the window frame. Molded to have a cross-sectional shape. Furthermore, the reinforcing part is formed on a part of the surface of any of the side wall parts included in the second part.
According to the method for manufacturing an extruded product (glass run channel) having such a configuration, the linearity in the longitudinal direction is maintained after extrusion (during and after the cooling process), and the window frame can be accurately dimensioned without deteriorating workability. A glass run channel that can be easily mounted at the correct mounting position can be suitably manufactured.

According to still another preferred aspect of the glass run channel manufacturing method for a vehicle body, as described in claim 11, the protruding end of each of the vehicle inner side wall portion and the vehicle outer side wall portion faces the bottom wall portion side and faces each other. A vehicle interior seal lip and a vehicle exterior seal lip that extend in a folded manner while maintaining a space between the side wall portion and the vehicle exterior seal lip, respectively. A low friction part having a smaller friction coefficient than that of the main body part made of the first polymer material is extruded by the second polymer material same as the reinforcing part on the surface of the bottom wall part where the window plate can contact. It is characterized by molding.
According to the method for manufacturing a glass run channel for a vehicle body having such a configuration, in addition to the effect exhibited by the method for manufacturing a glass run channel for vehicle body according to claim 10, the low friction portion and the reinforcing portion are formed from the same polymer material. Reduction of material types (leading to material cost reduction) and simplification of manufacturing process (for example, fewer extruders can be used) are realized, and as a result, cost reduction of glass run channel manufacturing can be achieved. it can.

According to a further preferred embodiment of the method for producing a glass run channel for a vehicle body, as described in claim 12, in the coextrusion molding step, the heated and molten first polymer material and second polymer material are removed from an extruder. Supply to one extrusion mold, branch the molten second polymer material in the mold, and supply to a plurality of predetermined positions of the main body portion made of the first polymer material, and supply at the position The main body portion, the reinforcing portion, and the low friction portion having a predetermined cross-sectional shape are integrated from the extrusion port by fusing the second polymer material to the main body portion made of the first polymer material. The molded body is extruded, and in the solidification step, the molded body extruded from the extrusion port is cooled and solidified by a predetermined cooler.
According to the method for manufacturing a glass run channel for a vehicle body having such a configuration, an extrusion-molded product can be manufactured with one extrusion mold, so that the manufacturing process can be simplified and the manufacturing can be efficiently performed.

According to another preferred embodiment of the method for producing an extruded product of the present invention, as described in claim 13, the joint between the second portion and the reinforcing portion is unevenly fitted when viewed from the cross section of the extruded product. The surface of the second portion to which the reinforcing portion is joined is formed into a concave and / or convex shape, and the convex and / or concave shape corresponding to the concave and / or convex surface is inverted. The reinforcing portion is formed so as to have a joint surface.
According to the method of manufacturing an extruded product having such a configuration, the joint surface between the second portion of the main body portion and the reinforcing portion is not a simple flat surface (a simple straight boundary surface when viewed from the cross-section) but has an unevenness. A joint surface (a boundary surface that is uneven when viewed from the cross section) is formed. This increases the bonding area between the second portion and the reinforcing portion, and additionally provides an extruded product in which the second portion of the main body portion and the reinforcing portion are bonded with high bonding strength by mechanical fitting. There is a further effect of being able to.

In the extrusion molded product manufacturing method disclosed herein, preferably, both the crystalline resin contained in the first polymer material and the crystalline resin contained in the second polymer material are olefin-based thermoplastic resins. .
By using the first polymer material and the second polymer material containing the olefin-based thermoplastic resin and the olefin-based rubber (typically EPDM), it is possible to provide an extrusion-molded article having good recyclability.

  Hereinafter, preferred embodiments of the present invention will be described. Note that matters other than the matters specifically mentioned in the present specification and necessary for carrying out the present invention (for example, general matters relating to extrusion molding of a molded product such as a glass run channel) are the prior art. It can be grasped as a design matter of those skilled in the art based on the above. The present invention can be carried out based on matters disclosed in the present specification and drawings and common general technical knowledge in the field.

Hereinafter, a preferred embodiment (first embodiment) of a glass run channel that is mounted along a window frame (door frame) of a vehicle body as an extrusion molded product of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a side view schematically showing a front door 1A and a rear door 1B mounted on a vehicle body 1 of an automobile (here, a sedan type passenger car). In this figure, only the doors 1A and 1B attached to the left side surface of the vehicle body 1 of the automobile are shown, but a door and a glass run channel having the same configuration (ie, left-right symmetry) are also attached to the right side surface of the vehicle body. Therefore, in the following description, only the glass run channel mounted on the window frames of the front and rear doors 1A and 1B on the left side will be described.

As shown in FIG. 1, a front door 1A according to the present embodiment is roughly divided into a door outer panel 2A constituting a door body of a vehicle body 1 and a door inner panel (not shown) (hereinafter referred to as “door panel 2A”). And a window frame 10 formed above the panel 2A. The window frame (hereinafter simply referred to as “front door frame”) 10 of the front door 1A according to the present embodiment is a sash (that is, a long material obtained by bending a band steel plate into a predetermined cross-sectional shape by a cold roll forming method). ).
The front door frame 10 is formed integrally with a vertical frame 12 arranged in the vertical direction along the center pillar 8 of the automobile 1 and an upper end of the vertical frame 12, and obliquely downward along the front pillar 4 from the upper end region. And an upper frame 14 including a portion of the inclined frame 13 extending in the direction. The upper end of the vertical frame 12 and the terminal on the center pillar 8 side of the upper frame 14 are connected to each other by welding means such as TIG welding so as to intersect at a predetermined intersection angle. As a result, as shown in the figure, a corner portion, that is, a corner frame 18 is integrally connected so that the upper end of the vertical frame 12 and the center pillar side terminal of the upper frame 14 intersect at a predetermined intersection angle. ing. A partition frame 15 extending in a vertical direction (that is, a direction substantially orthogonal to the direction in which the upper edge 2AA of the door panel 2A extends) is detachable from a slightly forward portion of the inclined frame 13 portion of the upper frame 14 as shown in the figure. It is attached to. Although not particularly limited, in the present embodiment, the partition frame 15 is fastened and fixed to the upper frame 14 (specifically, the inclined frame 13) with screws or the like via an unillustrated L-shaped joint fitting.
Thus, as shown in FIG. 2, glass run channels 60 are respectively provided in the grooves inside the front door frame 10 (that is, the upper frame 14 including the vertical frame 12, the inclined frame 13, the partition frame 15, and the corner frame 18). , 80, 100, 120, 140 are installed, and the glass run channel assembly 50 is formed by connecting the glass run channels 60, 80, 100, 120, 140 to each other. The structure of the glass run channel according to this embodiment will be described later.

In front of the partition frame 15, a door panel upper edge 2AA, an upper frame 14 (specifically, an inclined frame 13) and a triangular opening surrounded by the partition frame 15 are formed. A window glass (that is, a fixed window) 7A is fitted.
At the rear of the partition frame 15, a door panel upper edge 2 </ b> AA, an upper frame 14 (including the inclined frame 13), a vertical frame 12, and a substantially rectangular window opening 9 </ b> A surrounded by the partition frame 15 are formed. Yes. A window plate 3A attached to a window plate elevating mechanism (not shown) provided in the door panel 2A is attached to the opening 9A so as to be raised and lowered while being guided by the glass run channel assembly 50 (FIG. 2).

Similarly, the rear door 1B according to the present embodiment is roughly divided into a door outer panel 2B constituting the door body and a door inner panel (not shown) (hereinafter, both are abbreviated as “door panel 2B”). The window frame 20 is formed above the panel 2B. The window frame (hereinafter simply referred to as “rear door frame”) 20 of the rear door 1 </ b> B according to the present embodiment is made of a sash similar to the front door frame 10.
The rear door frame 20 is formed integrally with the vertical frame 22 arranged in the vertical direction along the center pillar 8 of the automobile 1 and the upper end of the vertical frame 22, and obliquely downward along the rear pillar 6 from the upper end region. And an upper frame 24 including a portion of the inclined frame 23 extending in the vertical direction. The upper end of the vertical frame 22 and the terminal on the center pillar 8 side of the upper frame 24 are connected to each other by welding means such as TIG welding so as to intersect at a predetermined intersection angle. As a result, as shown in the figure, a corner portion, that is, a corner frame 28 is formed in which the upper end of the vertical frame 22 and the center pillar side terminal of the upper frame 24 are integrally connected so as to intersect at a predetermined intersection angle. ing. A partition frame 25 extending in a vertical direction (that is, a direction substantially orthogonal to the extending direction of the upper edge 2BB of the door panel 2B) is detachable from a slightly rearward portion of the inclined frame 23 portion of the upper frame 24 as shown in the figure. It is attached to. Thus, as shown in FIG. 2, the glass run channels 160 are respectively provided in the grooves inside the rear door frame 20 (that is, the vertical frame 22, the upper frame 24 including the inclined frame 23, the partition frame 25, and the corner frame 28). , 180, 200, 220, 240 are mounted, and the glass run channel assembly 150 is formed by connecting these glass run channels 160, 180, 200, 220, 240 together.

At the rear of the partition frame 25, a door panel upper edge 2BB, an upper frame 24 (specifically, an inclined frame 23) and a triangular opening surrounded by the partition frame 25 are formed, and the rear quarter is formed in the opening. A window glass (that is, a fixed window) 7B is fitted.
In front of the partition frame 25, a door panel upper edge 2BB, an upper frame 24 (including the inclined frame 23), a vertical frame 22, and a substantially rectangular window opening 9B surrounded by the partition frame 25 are formed. Yes. A window plate 3B attached to a window plate elevating mechanism (not shown) provided in the door panel 2B is attached to the opening 9B so as to be movable up and down while being guided by a glass run channel assembly described later.

FIG. 2 is a side view schematically showing the entire glass run channel assemblies 50 and 150 according to the present embodiment mounted in the grooves of the front door frame 10 and the rear door frame 20 described above. As shown in this figure, the glass run channel assemblies 50 and 150 are composed of glass run channels 60 and 160 that constitute a long upper side, glass run channels 80 and 180 that constitute a long vertical side, The glass run channels 100 and 200 constituting the upper corner portion, the glass run channels 120 and 220 constituting the long partition side portion, and the glass run channels 140 and 240 constituting the lower corner portion are provided.
Regarding the configuration characterizing the present invention, each glass run channel has a slight difference in size, cross-sectional shape, and the like due to differences in the shapes of the front and rear door frames 10, 20 and the frame structure of the parts to be mounted. There is no substantial difference. Accordingly, the following description will be given with respect to the glass run channel 80 in the vertical side portion attached to the vertical frame 12 of the front door frame 10, and redundant description of the glass run channel attached to other portions will be omitted.

FIG. 3 is a cross-sectional view showing a cross-sectional structure of the glass run channel 80 according to the present embodiment before being attached to the vertical frame 12. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 1 showing a state in which the glass run channel 80 according to the present embodiment is mounted on the vertical frame 12. In FIG. 4, the vertical frame 22 of the rear door frame 20 is not shown.
The long glass run channel 80 includes a main body portion 80A formed in a longitudinal direction with a predetermined cross-sectional shape by extrusion molding, and a reinforcing portion 80B formed in a part of the surface of the main body portion 80A in the longitudinal direction. Is provided.

Specifically, as shown in FIG. 3, the main body portion 80 </ b> A includes a bottom wall portion 86 disposed at a position facing the outer peripheral edge 3 </ b> AA (FIG. 1) of the window plate 3 </ b> A, and the width of the bottom wall portion 86. A vehicle interior side wall 83 projecting from the vehicle interior end portion in the direction through the vehicle interior connection portion 85, and a vehicle exterior side projecting from the vehicle exterior end portion in the width direction of the bottom wall portion 86 through the vehicle exterior connection portion 87. And a side wall 89. As shown in FIG. 4, the vehicle inner side connection portion 85 and the vehicle outer side connection portion 87 can be bent when attached to the front door frame 10, so that they can be bent on the adjacent bottom wall portion 86, the vehicle inner side and the vehicle outer side both sides. It is formed thinner than the side wall portions 83 and 89.
As shown in FIG. 3, in a state before being attached to the front door frame 10, the glass run channel (extruded product) 80 is composed of a bottom wall portion 86 and side wall portions 83 and 89 on both the inside and outside of the vehicle. It has a wide U-shaped constant cross-sectional shape. Further, as shown in the drawing, the main body portion 80A is directed to the bottom wall portion 86 side integrally from the protruding front end sides of the vehicle inner side wall portion 83 and the vehicle outer side wall portion 89, and is opposed to the opposite side wall portions 83 and 89. The vehicle interior seal lip 81 and the vehicle exterior seal lip 90 extend in a folded shape while maintaining a space therebetween.

Further, as shown in the drawing, an outer side locking protrusion 88 is formed on the end of the outer side wall 89 near the bottom wall 86 so as to project outward as a part of the main body 80A. Yes. On the end of the vehicle outer side wall 89 near the seal lip 90, a vehicle outer protrusion 91 is formed to project outward.
On the other hand, on the end portion of the vehicle inner side wall portion 83 near the bottom wall portion 86, a vehicle inner side engagement protrusion 84 is formed so as to project outward. A vehicle inner side protrusion 82 is formed at the end of the vehicle inner side wall 83 near the seal lip 81 so as to project outward.
The reinforcing portion 80B according to the present embodiment is formed on the surface of the vehicle inner protrusion 82 in a state where the reinforcing portion 80B is fused and integrated so as to project outward.

  Further, a portion of the bottom wall portion 86 facing the outer peripheral edge surface 3AA of the window plate 3A and the outer surface portions of the vehicle inner side seal lip 81 and the vehicle outer side seal lip 90 and corresponding to the above-described folded portions, respectively. Low friction portions 92, 93, and 94 having a lower coefficient of static friction than the bottom wall portion 86, the vehicle inner side seal lip 81, and the vehicle outer side seal lip 90 are respectively continuous in the longitudinal direction on the outer surface portion excluding Is formed.

The main body portion 80A of the glass run channel 80 according to this embodiment having such a configuration (except for the low friction portions 92, 93, 94) includes at least a crystalline resin and an olefin rubber at a predetermined first mixing ratio. The mixed first polymer material is formed of a first polymer material that exhibits a predetermined first hardness when solidified.
On the other hand, the reinforcing portion 80B and the low friction portions 92, 93, 94 include a second mixing ratio in which at least the crystalline resin and the olefin rubber are mixed at a second mixing ratio in which the mixing ratio of the crystalline resin is higher than the first mixing ratio. It is formed of a second polymer material that exhibits a predetermined second hardness that exceeds the first hardness when solidified.

Although it does not specifically limit, For example, 1st polymer material mix | blends 15-30 mass parts of crystalline resin, and 30-50 mass parts of olefin rubbers, such as EPDM (ethylene-propylene-diene rubber). it can. As the crystalline resin, olefinic thermoplastic resins such as polypropylene and polyethylene are preferable. In addition to these two main components, various subcomponents such as carbon black, process oil, vulcanizing agent, vulcanization accelerator, and filler (for example, talc) may be added.
On the other hand, the second polymer material can contain 35 to 55 parts by mass of a crystalline resin and 10 to 15 parts by mass of an olefin rubber such as EPDM (ethylene-propylene-diene rubber). As the crystalline resin, olefinic thermoplastic resins such as polypropylene and polyethylene are preferable. In addition to these two main components, various subcomponents such as carbon black, process oil, vulcanizing agent, vulcanization accelerator, and filler (for example, talc) may be added. For example, a suitable example is a second polymer material obtained by mixing polypropylene, ultrahigh molecular weight polyethylene, EPDM, silicone oil, or the like.
The hardness may be set so that the second hardness is higher than the first hardness. However, when manufacturing a glass run channel for a vehicle body as in the present embodiment, the durometer hardness (HDA) based on JIS K 7215 is used. Thus, the first hardness may be 60 to 80 (about 70 in the present embodiment), and the second hardness may be 85 to 100 (about 100 in the present embodiment).

Glass run channel 80 according to the present embodiment, as shown in FIG. 3, the cross-sectional shape in the boundary an imaginary straight reference line P crossing the center of the cross section are mutually asymmetrical (variant), and, the reference The line P is divided into a first part and a second part which are continuously integrated. Specifically, as shown in FIG. 3, the vehicle outer side becomes the first part and the vehicle inner side becomes the second part with the aerial straight line reference line P passing through substantially the center of the bottom wall portion 86 as the boundary. That is, as shown in the drawing, the vehicle interior side wall portion 83 corresponding to the second thickness portion of the second portion in the present embodiment is a vehicle corresponding to the first thickness portion of the first portion in the present embodiment. It is formed thicker than the outer side wall part 89. For this reason, in the conventional glass run channel of this kind of irregular cross-sectional shape in which the reinforcing portion 80B is not formed, the relatively thick second portion (second The thickness portion) is cooled more slowly than the relatively thin first portion (first thickness portion). As a result, the thick side (second part) maintains a higher degree of crystallinity than the thin side (first part), so the longitudinal shrinkage of the glass run channel on the thick side (second part) is , Larger than the thin side (first portion). Therefore, in such a conventional glass run channel having an irregular cross-sectional shape, a curve (warp) is generated such that the thick wall side contracts in the longitudinal direction.
On the other hand, in the glass run channel 80 according to the present embodiment, crystallization proceeds during cooling and the second portion (here, the vehicle interior) has a relatively higher shrinkage than the first portion (here, the vehicle exterior). A reinforcing portion 80B having a crystallinity lower than that of the second portion, a small shrinkage rate, and a high hardness is formed on the surface. For this reason, in the glass run channel 80 of the present invention, the contraction of the second portion (vehicle inner side) of the main body portion 80A is limited by the presence of the reinforcing portion, and as a result, linearity is maintained in the longitudinal direction. That is, even in the state cooled to the room temperature region, the linearity can be maintained in the longitudinal direction without bending in an unintended direction. As a result, the glass run channel after cooling can be easily mounted at the correct mounting position of the window frame with an accurate dimension without deteriorating the work for cutting the glass run channel into a predetermined dimension.

The glass run channel 80 according to the present embodiment including the reinforcing portion 80B can be manufactured by performing conventional general extrusion molding (two-color molding). For example, it can be easily manufactured using an extrusion molding apparatus 500 as schematically shown in FIG.
The illustrated extrusion molding apparatus 500 generally includes an extrusion mold 510 having an orifice (extrusion port) 510A having a predetermined cross-sectional shape, a cooler 530, a take-up machine 540, and a cutting machine 550. .
Further, the extrusion mold 510 has a first raw material supply path 512 and a second raw material supply that communicate with a first extruder and a second extruder (typically, a single-screw or multi-screw screw extruder) (not shown), respectively. A channel 514 is connected, and the first polymer material and the second polymer material in a molten state are supplied into the extrusion mold 510 through the first material supply channel 512 and the second material supply channel 514, respectively. . A predetermined flow path is formed in the extrusion mold 510, and the molten second polymer material is branched in the extrusion mold 510, and the main body 80A made of the molten first polymer material is formed. A portion corresponding to the reinforcing portion 80B and the low-friction portions 92, 93, 94 is supplied, and the second polymer material is fused to the main body portion 80A made of the first polymer material at this portion, and a predetermined crossing from the orifice 510A. It is possible to extrude an extruded molded body 80 ′ in which the surface-shaped main body portion 80A, the reinforcing portion 80B, and the low friction portions 92, 93, 94 are integrated. Since the configuration of the extrusion mold 510 and the extrusion process itself are general, further detailed description is omitted.

The molded body 80 ′ extruded from the orifice 510 </ b> A of the extrusion mold 510 is then introduced into the cooler 530. The cooler 530 includes a cooling tank containing a cooling medium (for example, water), and can cool the extruded body 80 ′ introduced into the cooling tank (cooling step).
Here, in the glass run channel 80 according to the present embodiment, the reinforcing portion 80B formed on the surface of the second portion is rapidly cooled before the main body portion 80A (particularly the thick second portion) is completely cooled. The reinforcing portion 80B has a small shrinkage because the crystallinity is lowered by the rapid cooling. In addition, the reinforcing portion 80B is formed with higher hardness when solidified than the main body portion 80A due to the difference in the polymer material. Therefore, the presence of such a hard reinforcing portion 80B having a small degree of shrinkage can suppress the shrinkage of the second portion of the main body portion 80A having a high degree of crystallization due to slow cooling. For this reason, the extruded product 80 that has been cooled does not warp or bend, and can maintain a straight state in the longitudinal direction.

The cooled extruded product 80 is taken up via the take-up machine 540 (take-off process), and then guided to a cutting machine 550 having a cutter 552 and cut into a predetermined length (cut-off process). The cutting machine 550 is equipped with a sensor 554 that detects the size of the molded product 80 guided on the mounting table 556. Based on the detection signal from the sensor 554, the cutter 552 is operated at a predetermined interval, and a predetermined value is obtained. It is possible to continuously produce an extruded product (glass run channel) 80 that has been cut to a length of. At this time, since the extruded product 80 is not warped or curved in the longitudinal direction, the extruded product 80 can be cut to a correct length without processing to return the extruded product 80 to a straight shape.
After the glass run channel 80 according to the present embodiment manufactured by such a series of processes is cut into a predetermined length due to the presence of the reinforcing portion 80B formed in the second portion (the vehicle interior side) as described above. In this state, the linearity is maintained.

Next, the glass run channel 80 according to the present embodiment formed from the first polymer material and the second polymer material and cut to a predetermined length was attached to a predetermined position (vertical frame 12) of the front door frame 10. The state will be described. First, the frame structure will be described with reference to the drawings.
As shown in FIG. 4, the vertical frame 12 is formed by a sash of a steel plate bent so that the vehicle inner wall 12G and the vehicle outer wall 12A are arranged substantially in parallel in the width direction of the vehicle body of the automobile. A groove 12S is formed between the two side walls 12A and 12G. That is, the periphery of the groove 12S in the vertical frame 12 is constituted by the vehicle outer side wall 12A, the vehicle inner side wall 12G, and the bottom wall 12J.
In the present embodiment, the surface direction of the bottom wall 12J and the surface direction of the window plate 3A are not orthogonal to each other, and the vehicle outer side of the bottom wall 12J is positioned behind the vehicle body from the vehicle inner side (that is, the window It is inclined (so that the crossing angle between the surface direction of the plate 3A and the bottom wall 12J on the vehicle exterior side becomes an obtuse angle).
Further, the portion of the vehicle outer wall 12A near the bottom wall 12J has an opening portion of the vehicle outer wall 12A so that the groove inner space (the interval between the vehicle outer wall 12A and the vehicle inner wall 12G) is larger than the vicinity of the opening portion. It is formed as an enlarged wall 12B that is recessed outward from the inner wall 12D that is closer, and a step portion 12C is formed between the enlarged wall 12B and the inner wall 12D. Similarly, the portion of the vehicle inner wall 12G near the bottom wall 12J is formed as an enlarged wall 12H that is recessed outward from the inner peripheral wall 12E near the opening of the vehicle inner wall 12G. The enlarged wall 12H and the inner peripheral wall 12E A step portion 12F is formed between the two.

Thus, as shown in FIG. 4, the glass run channel 80 according to the present embodiment having the above-described configuration is expanded as described above by bending the connecting portions 85 and 87 on the inside and outside of the vehicle. It is mounted in the groove 12S from the opening side of the vertical frame 12 while elastically displacing from a letter shape to a U-shape with a reduced degree of expansion. At this time, as shown in FIG. 4, the vehicle interior side wall portion 83 and the vehicle exterior side wall portion 89 that are elastically displaced press the vehicle interior side wall 12G and the vehicle exterior wall 12A with a predetermined elastic force, respectively.
When the glass run channel 80 according to the present embodiment is mounted, the vehicle inner side locking projection 84 and the vehicle outer side locking projection 88 are elastically deformed, respectively, so that the vehicle inner side expansion wall 12H and the vehicle outer side expansion wall 12B. It is possible to securely prevent the drop-out by being caught in the stepped portion 12C and 12F by elastic repulsion. Further, it is possible to prevent a gap from being generated between the vehicle inner side wall 12 </ b> G and the vehicle outer side wall 12 </ b> A of the vertical frame 12 and the glass run channel 80 by the vehicle inner protrusion 82 and the vehicle outer protrusion 91.
Further, as shown in the figure, the reinforcing portion 80B is formed so as not to contact the vertical frame 12 (the vehicle inner side wall 12G) that is the attached body, and therefore, the adverse effects associated with the contact, for example, the generation of abnormal noise due to the contact are prevented. It can be prevented in advance.

Further, in the glass run channel 80 according to the present embodiment, the low friction portion 92, the portion where the window plate 3A contacts (specifically, the bottom wall portion 86 and the surfaces of the vehicle inner seal lip 81 and the vehicle outer seal lip 90). 93 and 94 are formed, and the friction of the contact portion between the window plate 3A and the glass run channel 80 when the window plate 3A is moved up and down is reduced, and the window plate 3A is moved up and down smoothly.
On the other hand, in the glass run channel 80 according to the present embodiment, such low friction portions are not formed in the root portions 81A and 90A of the vehicle inner side seal lip 81 and the vehicle outer side seal lip 90, and the first polymer is formed. The material is exposed along the longitudinal direction with a constant width. For this reason, it does not receive the influence of the low friction part and reinforcement part which exhibit 2nd hardness, and does not inhibit the bendability of the seal lips 81 and 90. Furthermore, it is possible to prevent cracks and the like from occurring in the root portions 81A and 90A.
In the glass run channel 80 according to the present embodiment, the low friction portions 92, 93, 94 and the reinforcing portion 80B are formed of the same second polymer material. For this reason, reduction of the kind of material used and simplification of a manufacturing process are implement | achieved, and cost reduction, such as reduction of material cost, can be aimed at. Further, since the main body 80A, the reinforcing portion 80B, and the low friction portions 92, 93, 94 of the glass run channel 80 are all formed of the same polymer material, they become unnecessary (or are not used for various reasons). When discarded in use), the glass run channel 80 can be reused, for example, by grinding.

Hereinafter, another preferred embodiment (second embodiment) of the glass run channel of the present invention will be described in detail with reference to the drawings. FIG. 6 is a cross-sectional view showing a modified cross-sectional shape of the glass run channel 280 according to the present embodiment attached to the front door frame 310 (vertical frame 312).
First, the window frame structure will be described. As shown in FIG. 6, the vertical frame 312 according to the present embodiment includes an outer panel 311 </ b> A arranged on the vehicle outer side, an inner panel 311 </ b> B arranged on the vehicle inner side, and a gap between them. The sash member (channel member) 311C is fixed to both panels 311A and 311B by means. The sash member 311C is formed such that the vehicle inner side wall 312G and the vehicle outer side wall 312A are arranged substantially parallel in the width direction of the vehicle body of the automobile, and a groove 312S is formed between the two side walls 312A and 312G along the frame. Is formed. That is, the periphery of the groove 312S in the vertical frame 312 is constituted by the vehicle outer wall 312A, the vehicle inner wall 312G, and the bottom wall 312J. As shown in the figure, locking projections 312H and 312H are formed on the inner wall surfaces of the vehicle outer wall 312A and the vehicle inner wall 312G.

As shown in FIG. 6, the long glass run channel 280 according to the present embodiment includes a main body portion 280A formed in the longitudinal direction with a predetermined irregular cross-sectional shape by extrusion molding similar to the first embodiment, A reinforcing part 280B formed over the longitudinal direction is provided on a part of the surface of the main body part 280A.
Specifically, as shown in FIG. 6, the main body 280 </ b> A includes a bottom wall portion 286 disposed at a position facing the outer peripheral edge 3 </ b> AA (see FIG. 1) of the window plate 3 </ b> A, and the bottom wall portion 286. A vehicle inner side wall portion 283 that protrudes from the vehicle inner end portion in the width direction via the vehicle inner side connection portion 285, and a vehicle that protrudes from the vehicle outer end portion in the width direction of the bottom wall portion 286 via the vehicle outer side connection portion 287. And an outer side wall portion 289. The vehicle interior coupling portion 285 and the vehicle exterior coupling portion 287 are more than the adjacent bottom wall portion 286 and side wall portions 283, 289 on both the vehicle interior side and the vehicle exterior side so that they can be bent when attached to the front door frame 310. It is thin.

As shown in the figure, the inner side wall portion 283 and the outer side wall portion 289 are folded back with a space between the opposing side wall portions 283 and 289 which are integrally directed to the bottom wall portion 286 side from the protruding front end side. The vehicle interior seal lip 281 and the vehicle exterior seal lip 290 extend in the shape of a vehicle.
Further, a vehicle outer side protrusion 291 is formed on the end of the vehicle outer side wall 289 near the seal lip 290 so as to project outward.
On the other hand, as shown in the drawing, the front end side of the vehicle interior side wall portion 283 extends in a folded manner while maintaining a space between the side wall portion 283 on the side opposite to the vehicle interior seal lip 281. When mounted on the vertical frame 312), the inner panel 311B of the door frame 310 (vertical frame 312) is covered from the outside and elastically displaced so that the vehicle interior side wall 312G and the inner panel 311B can be gripped together with the side wall portion 283. A vehicle interior shielding lip 282 is formed.
A reinforcing portion 280B according to the present embodiment is formed on the inner surface of the inner shielding lip 282 in a state of being fused and integrated.

Similarly to the first embodiment, with respect to the glass run channel 280 according to the present embodiment, the portion of the bottom wall portion 286 facing the outer peripheral edge 3AA of the window plate 3A, the vehicle inner seal lip 281 and the vehicle outer seal lip 290 are also shown. The outer surface portions excluding the root portions 281A and 290A corresponding to the above-described folded portions are more than the bottom wall portion 286, the vehicle interior seal lip 281 and the vehicle exterior seal lip 290, respectively. Low friction portions 292, 293, and 294 having a low coefficient of static friction are formed continuously in the longitudinal direction.
The reinforcing portion 280B and the low friction portions 292, 293, and 294 are formed of the second polymer material, and the other main body portion 280A is formed of the first polymer material, as in the first embodiment. Yes, redundant explanation regarding polymer materials and extrusion molding method (FIG. 5) is omitted.

Glass run channel 280 according to this embodiment, as shown in FIG. 6, the cross-sectional shape in the boundary an imaginary straight reference line P crossing the center of the cross section are mutually asymmetrical (variant), and, the reference The line P is divided into a first part and a second part which are continuously integrated. Specifically, as shown in FIG. 6, the vehicle outer side is the first portion and the vehicle inner side is the second portion with the aerial straight line P passing through the substantially center of the bottom wall portion 286 as a boundary. That is, as shown in the figure, the second portion in the present embodiment includes the vehicle interior side wall portion 283, the vehicle interior seal lip 281 and the vehicle interior shielding lip 282, and the first portion in the present embodiment includes the vehicle exterior side wall portion 289 and A vehicle exterior seal lip 290 is included. The vehicle interior side wall portion 283 that is the second thickness portion of the second portion is formed to be thicker than the vehicle exterior side wall portion 289 corresponding to the first thickness portion of the first portion.
Similarly to the glass run channel 80 according to the first embodiment, in the glass run channel 280 according to the present embodiment, in the cooling process to room temperature after extrusion, crystallization proceeds and the first portion (here, the vehicle exterior side). ) On the surface of the second part (in this case, the inside of the vehicle) where the shrinkage rate is relatively larger than the lower part) in the cooling step, the degree of crystallinity is lower than that of the second part and the shrinkage rate is small and the hardness is high. A portion 280B is formed. For this reason, contraction of the second portion of the main body 280A is limited by the presence of the reinforcing portion 280B, and as a result, linearity is maintained in the longitudinal direction. That is, even in the state cooled to the room temperature region, the linearity can be maintained in the longitudinal direction without bending in an unintended direction. Accordingly, the glass run channel 80 after cooling can be easily mounted at the correct mounting position of the window frame with an accurate dimension without deteriorating the work of cutting the glass run channel 80 into a predetermined dimension.

Thus, the glass run channel 280 according to this embodiment having the above-described configuration is mounted in the groove 312S from the opening side of the vertical frame 312 while being elastically deformed, as shown in FIG. At this time, the elastically displaced vehicle inner side wall portion 283 and vehicle outer side wall portion 289 press the vehicle inner side wall 312G and the vehicle outer side wall 312A with a predetermined elastic force, respectively. Further, the locking protrusions (not shown) protruding from the vehicle interior side wall portion 283 and the vehicle exterior side wall portion 289 are engaged with the locking projections 312H and 312H, so that the glass run channel 280 can be securely removed. Can be prevented.
Further, according to the glass run channel 280 according to the present embodiment, the outer panel 311A and the inner panel 311B of the vertical frame 312 and the channel member 311C (the vehicle inner side wall 312G and The end of the vehicle outer wall 312A) can be obscured.
Further, as shown in the figure, when the glass run channel 280 is attached to the vehicle body, the reinforcing portion 280B is not formed in a portion where the glass run channel 280 contacts the vertical frame 312 (vehicle interior side wall 312G). It is possible to prevent adverse effects associated with the contact, for example, the generation of abnormal noise due to the contact.

Furthermore, also in the glass run channel 280 according to the present embodiment, the low friction portions 292, 293, and 294 are formed at portions where the window plate 3A contacts, and the window plate 3A and the glass run when the window plate 3A moves up and down. The friction at the contact portion with the channel 280 is reduced, and the window plate 3A is smoothly moved up and down.
On the other hand, in the glass run channel 280 according to the present embodiment, such low friction portions are not formed in the root portions 281A and 290A of the vehicle inner side seal lip 281 and the vehicle outer side seal lip 290. The polymer material is exposed along the longitudinal direction with a constant width. For this reason, it does not receive the influence of the low friction part and reinforcement part which exhibit 2nd hardness, and does not inhibit the bendability of the seal lips 281 and 290. Furthermore, it is possible to prevent cracks and the like from occurring in the root portions 281A and 290A.
In the glass run channel 280 according to this embodiment, the low friction portions 292, 293, 294 and the reinforcing portion 280B are formed of the same second polymer material. For this reason, reduction of the kind of material used and simplification of a manufacturing process are implement | achieved, and cost reduction, such as reduction of material cost, can be aimed at. Further, the main body portion 280A, the reinforcing portion 280B, and the low friction portions 292, 293, and 294 of the glass run channel 280 are all formed of the same polymer material, so that when they are no longer necessary (or are not used for various reasons). When discarded in use), the glass run channel 280 can be reused, for example, by grinding.

As mentioned above, although the specific example of this invention was demonstrated in detail, referring drawings, these are only illustrations and do not limit a claim. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.
For example, in the first embodiment and the second embodiment, the reinforcing portion is formed so that a flat joint surface is formed on the surface of the second portion (that is, the joint boundary line is substantially linear in the cross section). However, it is not limited to this.
For example, as a modification of the joint portion (joint surface) between the vehicle interior protrusion 82 and the reinforcement portion 80B of the second portion of the first embodiment, as shown in FIGS. 7A and 7B, the second portions 400 and 401 and the reinforcement are provided. It is preferable to form the joints (joint surfaces) with the parts 410 and 411 so as to have a concave-convex fitting when viewed from the cross section of the extruded product. Thereby, the joining area of the 2nd parts 400 and 401 and the reinforcement parts 410 and 411 can be increased, and the mechanical strength of this joining surface can be improved by extension. In FIG. 7A, the reinforcing portion 410 is formed on the surface of the convex second portion 400 of the main body portion so as to have a concave joint surface corresponding to the convex shape. In FIG. 7B, the reinforcing portion 411 is formed on the surface of the concave-convex second portion 401 of the main body so as to have a concave-convex joint surface corresponding to the concave-convex shape.

  Moreover, although each above-mentioned embodiment demonstrated the glass run channel attached to the window frame of the vehicle body of a motor vehicle as a suitable example of an extrusion molded product, it is not restricted to such a glass run channel, this invention is various. Extruded products that have been applied to the manufacture of extruded products with a long and irregular cross-sectional shape for use and form, and have achieved the above-mentioned purpose (for example, for mounting on long vehicles such as roof moldings and weather strips other than glass run channels) Molding, or long building moldings such as joint materials) can be provided.

It is a vehicle outer side view which shows typically the front door and rear door of the motor vehicle with which the glass run channel which concerns on one Embodiment of this invention was attached. It is a side view which shows typically the whole structure of the glass run channel assembly which concerns on one Embodiment. It is sectional drawing which shows the unusual cross-sectional structure after the extrusion molding of the glass run channel which concerns on one Embodiment. It is sectional drawing which shows the mounting state to the window frame of the glass run channel which concerns on one Embodiment, and is IV-IV sectional view taken on the line in FIG. 1 (however, the vertical frame 22 of the rear door frame 20 is abbreviate | omitting illustration). ing.). It is explanatory drawing which shows an example of the extrusion molding apparatus which manufactures the glass run channel which concerns on one Embodiment. It is sectional drawing which shows the mounting state to the window frame of the glass run channel which concerns on other embodiment. It is sectional drawing which shows an example of the junction structure of the main-body part (2nd part) and reinforcement part of a glass run channel. It is sectional drawing which shows an example of the junction structure of the main-body part (2nd part) and reinforcement part of a glass run channel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car body 1A, 1B Door 3A, 3B Window plate 9A, 9B Window opening 10 Window frame (front door frame)
12 Vertical frame 12A Car outer wall 12B Car outer enlarged wall 12C Car outer stepped part 12D Car outer inner peripheral wall 12E Car inner inner peripheral wall 12F Car inner inner stepped part 12G Car inner side wall 12H Car inner side enlarged wall 12J Bottom wall 12S Groove 50 Glass run channel set Solid 60, 80, 100, 120, 140 Glass run channel 80A Body 80B Reinforcement part 81 Car interior seal lip 81A Root part 82 Car inner protrusion 83 Car inner side wall part 84 Car inner side locking protrusion 85 Car inner connection part 86 Bottom wall portion 87 Outer side connecting portion 88 Outer side locking projection 89 Outer side wall portion 90 Outer side seal lip 90A Root portion 91 Outer side projections 92, 93, 94 Low friction portion 150 Glass run channel assembly 160 , 180, 200, 220, 240 Glass run channel 280 Glass run channel 280A Body 280 Reinforcing part 281 Car inner side seal lip 281A Root part 282 Car inner side shielding lip 283 Car inner side wall part 285 Car inner side connecting part 286 Bottom wall part 287 Car outer side connecting part 289 Car outer side wall part 290 Car outer side seal lip 290A Root part 291 Car outer side Projection 292, 293, 294 Low friction part 310 Front door frame 311A Outer panel 311B Inner panel 311C Channel member (sash member)
312 Vertical frame 312A Car outer wall 312G Car inner wall 312J Bottom wall 312H Locking projection 312S Grooves 400, 401 Main body (second portion)
410, 411 Reinforcement unit 500 Extrusion molding device 510 Extrusion mold 510A Orifice 512 First raw material supply path 514 Second raw material supply path 530 Cooling machine 540 Take-up machine 550 Cutting machine 552 Cutter 554 Sensor 556 Mounting table P Overhead straight line reference line

Claims (13)

A long extruded product having an irregular cross-sectional shape extruded from a thermoplastic polymer material in a heated and molten state and cooled and solidified,
A main body portion formed in a predetermined cross-sectional shape over the longitudinal direction, and a reinforcing portion formed in a part of the main body portion over the longitudinal direction,
The main body is a first polymer material in which at least a crystalline resin and an olefin rubber are mixed at a predetermined first mixing ratio, and is formed from a first polymer material that exhibits a predetermined first hardness when solidified. Has been
The reinforcing portion is a second polymer material in which at least a crystalline resin and an olefin rubber are mixed at a second mixing ratio in which the mixing ratio of the crystalline resin is higher than the first mixing ratio, and when the solidified Formed from a second polymer material exhibiting a predetermined second hardness above the first hardness;
It said body portion is continuously comprises a first portion and a second portion which is integral with a fictitious straight reference line and the boundary cross-sectional shape is asymmetrical with each other across the heart the reference line portion in the cross section,
The first portion has a first thickness portion that is at least a portion of the first portion and has a maximum thickness in the first portion;
The second portion has a second thickness portion that is at least a portion of the second portion and has a maximum thickness in the second portion, and the second thickness portion is It is formed thicker than the first thickness portion, and the crystallinity of the second thickness portion of the second portion after cooling and solidification is the crystal of the first thickness portion of the first portion. It is formed to be higher than the degree of conversion,
Here, the reinforcing portion is formed in a state of being fused and integrated with a part of the surface of the second portion of the main body portion, and the crystallinity of the reinforcing portion after cooling and solidification is the main body. An extruded product formed so as to be lower in crystallinity than the second thickness portion of the second portion of the portion. Extruded product formed as a glass run channel mounted along the window frame of the vehicle body to guide the window plate,
The main body includes a bottom wall disposed at a position facing the outer peripheral edge of the window plate, a vehicle inner side wall projecting in one direction from a vehicle inner end in the width direction of the bottom wall, A vehicle outer side wall portion projecting in one direction from the vehicle outer side end portion in the width direction of the bottom wall portion, and substantially U comprising the bottom wall portion and both side wall portions in a state before being attached to the window frame. Extruded into a cross-sectional shape with a letter shape,
Here, one of the vehicle inner side wall portion and the vehicle outer side wall portion is included in the first portion, the other side wall portion is included in the second portion, and the reinforcing portion is the second portion. The extruded product according to claim 1, which is formed as a glass run channel for a vehicle body, which is formed on a part of the surface of the side wall portion included in the body. A vehicle inner side seal lip that extends in a folded manner with a space between the projecting tip of each of the vehicle inner side wall portion and the vehicle outer side wall portion facing the bottom wall portion and facing the opposite side wall portion. Seal lips are each formed from the first polymer material;
The inner seal lip and the outer seal lip of the vehicle and / or the surface of the bottom wall portion where the window plate can come into contact has a lower friction coefficient than the main body portion formed of the first polymer material. A friction part is formed,
The extruded product according to claim 2, wherein the low friction portion is formed as a glass run channel for a vehicle body formed of the same second polymer material as the reinforcing portion.   A root portion corresponding to the folded portion of the vehicle interior seal lip and the vehicle exterior seal lip is formed as a glass run channel for a vehicle body in which the first polymer material is exposed along the longitudinal direction with a constant width. 3. Extrusion product according to 3.   The first polymer material is exposed along the longitudinal direction at a constant width in a portion that can come into contact with the attached body when attached to a predetermined attached body. Extrusion product described in 2.   On the concave and / or convex surface of the second part, the concave and / or convex surface is formed so that the joint between the second part and the reinforcing part is a concave / convex fitting when viewed from the cross section of the extruded product. The extrusion molded product according to any one of claims 1 to 5, wherein the reinforcing portion having a convex and / or concave joint surface corresponding to the convex shape is inverted.   The extrusion molding according to any one of claims 1 to 6, wherein the crystalline resin contained in the first polymer material and the crystalline resin contained in the second polymer material are both olefinic thermoplastic resins. Goods. A method of producing a long extruded product having an irregular cross-sectional shape by extruding a thermoplastic polymer material in a heated and molten state,
The extrusion-molded product is a long extrusion-molded product including a main body portion formed in a longitudinal direction with a predetermined cross-sectional shape and a reinforcing portion formed in a part of the main body portion in the longitudinal direction. The following steps:
(1) As a material for molding the main body, a first polymer material in which at least a crystalline resin and an olefin-based rubber are mixed at a predetermined first mixing ratio, which has a predetermined first hardness when solidified. A first polymeric material present;
The material for molding the reinforcing portion is a second polymer material in which at least a crystalline resin and an olefin rubber are mixed at a second mixing ratio in which the mixing ratio of the crystalline resin is higher than the first mixing ratio, A second polymeric material that exhibits a predetermined second hardness that exceeds the first hardness when solidified;
Preparing a process;
(2) A step of obtaining an extruded body having the main body portion and the reinforcing portion having a predetermined cross-sectional shape by coextrusion molding using the first polymer material and the second polymer material in a heated and melted state, The coextruded molded body is
Continuously comprises a first portion and a second portion which is integral with said body portion is fictitious straight reference line asymmetrical to each other cross-sectional shape in the boundary across the center of the cross section the reference line portion,
The first portion has a first thickness portion that is at least a portion of the first portion and has a maximum thickness in the first portion;
The second portion has a second thickness portion that is at least a portion of the second portion and has a maximum thickness in the second portion; and the second thickness portion is the Formed thicker than the first thickness portion, and
The reinforcing portion is formed in a state of being fused and integrated with a part of the surface of the second portion of the main body portion; and (3) cooling the extruded body obtained by the coextrusion molding A step of solidifying, wherein the cooling is such that the crystallinity of the second thickness portion of the second portion after cooling and solidification is higher than the crystallinity of the first thickness portion of the first portion; And the degree of crystallinity of the reinforcing part after cooling and solidification is lower than the degree of crystallinity of the second thickness part of the second part;
Manufacturing method. In the co-extrusion molding step, the heated and melted first polymer material and second polymer material are supplied from one separate extruder to one extrusion mold, and from the extrusion port of the mold, Extruding a molded body in which the main body portion and the reinforcing portion having a predetermined cross-sectional shape are integrated,
The manufacturing method according to claim 8, wherein in the solidification step, the molded body extruded from the extrusion port is cooled and solidified by a predetermined cooler. The extruded product is a glass run channel mounted along the window frame of the vehicle body to guide the window plate,
The main body includes a bottom wall disposed at a position facing the outer peripheral edge of the window plate, a vehicle inner side wall projecting in one direction from a vehicle inner end in the width direction of the bottom wall, A vehicle outer side wall portion projecting in one direction from a vehicle outer side end portion in the width direction of the bottom wall portion, and any one of the vehicle inner side wall portion and the vehicle outer side wall portion is the first portion. And the other side wall portion is included in the second portion and has a substantially U-shaped cross-sectional shape including the bottom wall portion and both side wall portions in a state before being attached to the window frame. And shaped as
The manufacturing method according to claim 8 or 9, wherein the reinforcing portion is formed on a part of the surface of any of the side wall portions included in the second portion. A vehicle inner side seal lip and a vehicle outer side seal that extend in a folded manner while maintaining a space between the opposite side wall portions facing and facing the bottom wall portion at the projecting tips of the vehicle inner side wall portion and the vehicle outer side wall portion, respectively. Lips and extruded from the first polymer material, respectively.
Further, a low friction coefficient smaller than that of the main body portion made of the first polymer material is formed on the surface of the vehicle inner side seal lip and the vehicle outer side seal lip and / or the surface of the bottom wall where the window plate can come into contact. The manufacturing method according to claim 10, wherein a part is extruded by the same second polymer material as the reinforcing part. In the co-extrusion molding step, the heated and melted first polymer material and second polymer material are supplied from one separate extruder to one extrusion mold,
The molten second polymer material is branched in the mold and supplied to a plurality of predetermined positions of the main body portion made of the first polymer material, and the supplied second polymer material is supplied to the first polymer material at the position. By fusing to a main body portion made of a polymer material, a molded body in which the main body portion having a predetermined cross-sectional shape, the reinforcing portion, and the low friction portion are integrated is extruded from the extrusion port.
The manufacturing method according to claim 11, wherein in the solidifying step, the molded body extruded from the extrusion port is cooled and solidified by a predetermined cooler.   The surface of the second portion where the reinforcing portion is joined is concave and / or convex so that the joining portion of the second portion and the reinforcing portion is a concave-convex fitting when viewed from the cross section of the extruded product. The manufacturing according to any one of claims 8 to 12, wherein the reinforcing portion is molded so as to have a convex and / or concave joint surface corresponding to the concave and / or convex surface. Method.

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