JP2003039488A - Molding tool for glass run corner part and structure for molding glass run corner part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the joint state between seal lips on a joint face firm and secure. SOLUTION: The internal space 40 of a finished product shape of a molding tool 20 comprises a first cavity part 45 corresponding to one of the side walls, a second cavity part 46 corresponding to one of seal lips, a third cavity part 47 corresponding to the other side wall and a fourth cavity part 48 corresponding to the other seal lip. The first circulation promoting cavity part 50 straddling the first cavity part 45 and the second cavity part 46 and a second circulation promoting cavity part 51 straddling the third cavity part 47 and the fourth cavity part 48, are formed near a position where these parts 50 and 51 join a glass run straight line part. A material injection gate 43 provided in the first cavity part 45 is formed at a position in close proximity to the first circulation promoting cavity part 50 and a material injection gate 43 provided in the third cavity part 47 is formed at a position near the second material circulation promoting cavity part 51.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding die for a glass run corner portion and a molding structure for a glass run corner portion.

[0002]

2. Description of the Related Art A glass run 60 mounted along the inside of a vehicle door sash is shown in FIG.
An extruded glass run upper side portion 61 and a glass run vertical side portion 62 which are attached substantially linearly along the upper side portion and the vertical side portion of the door sash, respectively, and a molded glass run corner portion attached to the corner portion of the door ash. And 63. Such a glass run 60 has a glass run upper side portion 61 extruded in advance.
And one end of the glass run vertical side part 62 so as to abut against each other in the mold, and the glass run corner part 63 that connects one end of the glass run upper side part 61 and one end of the glass run vertical side part 62 is injection molded. It is generally manufactured by.

Further, the glass run 60 has an outer lip 64 for slidably sealing the outer side of the wind glass outer periphery and an inner lip 65 for slidably sealing the inner side of the outer edge of the wind glass. , Outer lip 64 and inner lip 65 as seal lips
Are continuously formed from a glass run upper side portion 61 which is an extrusion molding portion to a glass run corner portion 63 and a glass run vertical side portion 62 which is an extrusion molding portion. Exterior side wall 66 and interior side wall 6 of grass run 60
7 is also formed continuously from the grass run upper side portion 61 to the grass run corner portion 63 and the grass run vertical wall portion.

The material injection gates 68, 68 for injecting the molten material into the product shape space of the glass run corner portion 63 have the glass run corner portion 6 as shown in FIGS.
The outer side wall 66 and the inner side wall 67 are provided at two locations at substantially central positions along the longitudinal direction of the vehicle. The product shape space 69 of the glass run corner portion 63 has an upper mold 70 and a lower mold 7.
1 and core 72. Incidentally, 73 is a mounting plate to which the upper die 70 is attached, and 74 is an upper die 7
0 and the runner formed in the mounting plate 73.

The molten material injected from the material injection gates 68, 68 flows in the product shape space 69 and is filled in the product shape space 69, as shown by the arrow in FIG.

[0006]

However, in the glass run corner portion 63 manufactured as described above,
From the material injection gates 68, 68 to the glass run corner 6
Since the distance to the joint surface between the No. 3 and the extrusion molding portion (grass run upper side portion and grass run corner portion) is large, the temperature and the inflow pressure of the molten material reaching the above-mentioned joint surface are at positions near the material injection gates 68, 68. In comparison with the temperature and the inflow pressure of the molten material in the above, there is a possibility that the joint strength between the continuous seal lips on the joint surface may be lowered.
That is, when a load such as lifting and lowering of the glass is applied to the seal lip, there is a problem that adhesive peeling easily occurs between the seal lip of the extrusion molding portion and the seal lip of the glass run corner portion on the joint surface.

Further, if the thickness of the seal lip is made thicker, it is possible to improve the joining strength between the continuous seal lips at the joining surface. However, if the seal lip is made thicker, the rigidity of the seal lip is increased. Has grown,
There is a problem that sliding performance with respect to the windshield is deteriorated.

Therefore, an object of the present invention is to improve the joining state between the seal lips at the joining surface between the glass run corner portion and the extruded portion without impairing the sliding performance of the seal lip with respect to the windshield.

[0009]

According to a first aspect of the present invention, there is provided an extruded glass run straight end, a main body having a substantially U-shaped cross section, and ends of the side walls of the main body toward the bottom wall of the main body. In a molding die for molding a glass run corner portion having a thin seal lip extended respectively, the product shape space corresponding to the product shape of the glass run corner portion defined in the molding die is A material injection gate for injecting the molten material into the product shape space is provided, which corresponds to one side wall of the glass run corner.
A cavity part, a second cavity part corresponding to one seal lip extending from the one side wall, and a material injection gate for injecting a molten material into the product shape space are provided, and the other side wall of the glass run corner part is provided. Corresponding third
A cavity portion; a fourth cavity portion corresponding to the other seal lip extending from the tip of the other side wall; and a fifth cavity portion corresponding to the bottom wall.
The first flow promoting cavity part extending over the cavity part and the second cavity part, and the second flow promoting cavity part extending over the third cavity part and the fourth cavity part are joined to the grass run straight part. And a material injection gate provided in the first cavity portion in the vicinity of the first cavity portion, the material injection gate being provided in a position close to the first flow promotion cavity portion, and provided in the third cavity portion. Is formed at a position close to the second material flow promotion cavity portion. As a result, the molten material injected from the material injection gate quickly reaches the joint surface of the second cavity portion and the fourth cavity portion with the straight line portion of the glass run through the first circulation promotion cavity portion or the second circulation promotion cavity portion. To do.

According to a second aspect of the present invention, in the first aspect of the invention, the first and second flow promoting cavities are provided in the core of the molding die in the longitudinal direction of the product shape space. It is characterized by being formed by providing orthogonal slits.

According to a third aspect of the present invention, in the second aspect of the present invention, the wall surfaces of the slit facing each other are formed in a tapered shape, and the thin portion of the glass run corner formed by the material in the slit. Is formed so that the valley side of the substantially wedge-shaped cross section formed by the side wall and the seal lip continuous with each other is thicker than the tip side of the seal lip. It has a feature.

According to a fourth aspect of the present invention, there is provided a molding structure of a glass run corner portion molded at an end of an extruded glass run straight portion, the main body having a substantially U-shaped cross section, and a vehicle exterior side wall of the main body. Of the glass run corner portion having a vehicle exterior seal lip extending from the tip of the vehicle toward the bottom wall of the main body, and a vehicle interior seal lip extending from the tip of the vehicle interior side wall of the body toward the bottom wall. In the molding structure, the vehicle outer side wall and the vehicle outer side seal lip are straddled, and the vehicle outer side thin portion that is thinner than the vehicle outer side seal lip, the vehicle inner side wall, and the vehicle inner side seal lip are straddled. A vehicle-inside thin portion that is thinner than the thickness of the vehicle-inside seal lip, and is formed in the vicinity of a joining position of the straight line portion of the glass run, Is characterized in that molten material for molding of the glass run corner from the vehicle inner thin portion near the position of the serial vehicle inner sidewall is injected.

[0013]

According to the present invention, the molten material injected from the material injection gate is directly connected to the glass run straight line portion of the second cavity portion and the fourth cavity portion through the first flow promoting cavity portion or the second flow promoting cavity portion. Since the temperature of the molten material and the inflow pressure of the joint surface are prevented from reaching the joint surface promptly, the joint strength between the seal lip at the glass run corner and the seal lip at the straight portion of the glass run is prevented. It is possible to improve without increasing the wall thickness.

Further, according to the invention described in claim 3, the mold release property of the core can be improved.

[0015]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a perspective view of a corner portion of a glass run 1 according to the present invention which is attached to a corner portion of a door sash.

The glass run 1 includes a glass run upper side portion 2 and a glass run vertical side portion 3 and a glass run vertical side portion 3 as extruded glass run straight portions which are attached in a substantially straight line along the upper side portion and the vertical side portion of the door sash. 2 and one end of the glass run vertical side portion 3 are continuous with each other, and a molded glass run corner portion 4 is formed.

The glass run corner portion 4 is bent at a substantially central position in the longitudinal direction thereof and has a substantially L shape as a whole.

The glass run 1 has a main body 5 having a substantially U-shaped cross section.
A vehicle outer side seal lip 8 extending from the tip of the vehicle exterior side wall 6 of the body 5 toward the bottom wall 7 of the body 5, and a vehicle exterior seal lip 8 extending from the tip of the vehicle interior side wall 9 of the body 5 toward the bottom wall 7. The vehicle interior seal lip 10 is provided. The vehicle exterior side wall 6, the vehicle interior side wall 9, the vehicle exterior side seal lip 8 and the vehicle interior side seal lip 10 are formed so as to be continuous from the grass run upper side portion 2 to the grass run corner portion 4 and the grass run vertical side portion 3, respectively. Together, they are formed so as to have substantially the same cross-sectional shape along the longitudinal direction of the glass run 1.

The vehicle outer side seal lip 8 is provided on the vehicle inner side seal lip 1 on the outer side of the windshield outer peripheral edge (not shown).
0 indicates the inside of the windshield outer edge (not shown),
Each is slidably sealed.

The glass run corner portion 4 has a thin portion 1 on the inner side of the vehicle, which extends over a side wall 9 on the inner side of the vehicle and a seal lip 10 on the inner side of the vehicle.
1a, 11b, vehicle exterior side wall 6 and vehicle exterior seal lip 8
The outer thin portions 11c and 11d extending over the vicinity of the joint surface 12 between one end of the grass run upper side portion 2 and one end of the grass run corner portion 4, and one end of the grass run vertical side portion 3 and the glass run corner portion 4 It is formed in the vicinity of the joint surface 13 with the end.

In this embodiment, the thin portion 11 on the inner side of the vehicle
The a and 11b are formed to be relatively larger than the outer thin parts 11c and 11d. This means that the inner side wall 9 and the inner side seal lip 10 are larger than the outer side wall 6 and the outer side seal lip 8. This is because the vehicle inner thin portions 11a and 11b and the vehicle outer thin portion 11 are formed.
c and 11d are substantially similar shapes.

FIG. 2 is an enlarged view of the vicinity of the vehicle outer side thin portion 11c. The thickness of the vehicle outer side thin portion 11c is such that the vehicle outer side sealing lip 8 starts from the valley side of the gap having a substantially wedge-shaped cross section formed by the vehicle outer side wall 6 and the vehicle outer side sealing lip 8.
Is gradually thinned toward the tip side.

The wall thickness t of the vehicle outer thin portion 11c is determined according to the wall thickness of the vehicle outer seal lip 8. For example, if the vehicle outer seal lip 8 has a wall thickness of 1.2 mm, the thickness t is relatively large. The wall thickness t1 on the valley side that becomes thick is 0.8 mm, and the wall thickness t2 on the tip side of the outermost seal lip 8 that is the thinnest is 0.6 mm. It is formed thin. In addition, the thin portion 1 on the outer side of the vehicle
1c is a grass run upper part 2 and a grass run corner part 4
It is formed so that the distance L to the joining surface 12 of the and is about 5 to 10 mm.

The vehicle-inside thin-walled portions 11a and 11b and the vehicle-outside thin-walled portions 11d are also the above-described vehicle-inside thin-walled portions 11a and 11b.
Like c, they are formed respectively.

FIG. 3 shows the above-mentioned grass run corner portion 4
The perspective view of the whole molding die 20 which shape | molds is shown. The molding die 20 includes a lower die 22 fixed to a lower mounting plate 21.
The upper mold 25 has four corners attached to the upper mounting plate 24 via the hanging pins 23, and the core 26 supported to be movable up and down with respect to the lower mold 22. The upper mounting plate 24 is movable in the direction of the arrow in the figure, and when the upper mounting plate 24 descends, the upper die 25 comes into close contact with the lower die 22.
still. In the figure, 27 is a sprue and 28 is a runner.

Cylindrical accommodating portions (not shown) capable of accommodating the hanging pins 23 are formed at four corners of the upper mold 25.
The lower end of the hanging pin 23 can be engaged with the opening edge of the accommodating portion. Then, a spring (not shown) is interposed between each of these accommodating portions and the lower end of each of the hanging pins 23, and the upper mounting plate 24 descends toward the lower die 22 to move to the lower die 22. When the upper die 25 comes into contact, the suspension pin 23 is housed in each housing portion against the biasing force of the spring, and the upper die 25 and the upper mounting plate 24 are configured to closely contact each other without a gap.

On the core 26, a positioning projection 29 for positioning one end of the grass run upper side portion 2 in the mold and a positioning projection (not shown) for positioning one end of the grass run vertical side portion 3 in the mold. Are formed respectively. And
As shown in FIG. 4, prior to the molding of the grass run corner portion 4, the grass run upper side portion 2 is mounted on the core 26 along the arrow direction in the figure until one end of the grass run upper side portion 2 abuts on the positioning protrusion 29. It Although not shown, the grass run vertical side portion 3 is also formed on the core 26 prior to the molding of the grass run corner portion 4 so that one end of the grass run vertical side portion 3 abuts on a positioning protrusion (not shown), similarly to the grass run upper side portion 2. It is installed.

The core 26 has a thin portion 1 as described above.
Slits 30a-30 corresponding to 1a-11d, respectively
d is formed so as to be orthogonal to the longitudinal direction of the core 25. (However, the slits 30c and 30d are not shown.) FIG. 5 shows, among the four slits 30, a slit 30a corresponding to the vehicle-inside thin portion 11a close to the joint surface 12 between the glass upper side portion 2 and the glass run corner portion 4. 4 is an enlarged view and corresponds to a portion A surrounded by a broken line in FIG.

The slits 30a are formed by tapering the wall surfaces 31, 31 facing each other in a tapered shape. The slits 30a extend from the tip 32 of the slit 11a corresponding to the valley side of the vehicle interior thin portion 11a to the vehicle interior thin portion 11a. Car interior seal lip 1
Toward the base end 33 of the slit 11a corresponding to the 0 side,
The wall surfaces 31, 31 are formed so that the distance between them becomes gradually narrower. In this embodiment, the tip 3 of the slit 11a is
2, the distance t3 between the wall surfaces 31 and 31 is 0.8 mm,
The distance t4 between the wall surfaces 31, 31 at the base end 33 of the slit 11a is 0.6 mm. The slit 11
The b to 11d are also formed similarly to the slit 11a.

Then, the core 26 having the grass run upper side portion 2 and the grass run vertical side portion 3 mounted thereon is set at a predetermined position of the lower mold 22, and the upper mold 25 and the upper mounting plate 24 are brought into close contact with each other without any gap. The mounting plate 24 is lowered toward the lower mold 22, and the product shape space 40 (details will be described later) of the glass run corner portion 4 by the upper mold 25, the lower mold 22, and the core 26.
Define.

FIG. 6 shows a product shape space 40 defined in the molding die 20 and located between one end of the upper portion 2 of the glass run and one end of the vertical side portion 3 of the glass run. Here, 41 indicates a runner formed on the upper mounting plate 24. Further, 43a to 43d are four material injection gates for injecting the molten material into the product shape space 40 (however,
For the material injection gate 43c, refer to FIG. 7 described later, and for the material injection gate 43d, not shown). These material injection gates 43a to 43d are provided in the upper mold,
Each communicates with the runner 28.

FIG. 7 is a sectional view of the molding die 20 at the position where the material injection gates 43a and 43c are provided.

The product shape space 40 has a material injection gate 43.
c and 43d are provided, and the first cavity portion 45 corresponding to the vehicle exterior side wall 6 of the grass run corner portion 4 and the second cavity portion 45 corresponding to the vehicle exterior seal lip 8 of the glass run corner portion 4 are provided.
A cavity portion 46 and material injection gates 43c and 43d are provided, and a third cavity portion 47 corresponding to the vehicle interior side wall 9 of the glass run corner portion 4 and a fourth cavity corresponding to the vehicle interior seal lip 10 of the glass run corner portion 4. The first cavity portion 4 and the fifth cavity portion 49 corresponding to the bottom wall 7 of the grass run corner portion 4.
5 and the second cavity portion 46, the first flow promoting cavity portions 50, 50, and the third cavity portion 47 and the fourth cavity portion 48, the second flow promoting cavity portion 5
1 and 51 are formed near both ends of the product shape space 40 along the longitudinal direction. In other words, the first flow promotion cavity parts 50, 50 and the second flow promotion cavity parts 51, 51 are formed near one end of the glass run upper side part 2 and one end of the grass run vertical side part 3 which are straight parts of the glass run, respectively. Has been done.

Vehicle outer thin portions 11c and 11d are formed by the first flow promoting cavity portions 50 and 50, and vehicle inner thin portion 1 is formed by the second flow promoting cavity portions 51 and 51.
1a and 11b are formed. The arrow in FIG. 7 shows the flow of the molten material injected into the product shape space 40 from the material injection gate 43c.

FIG. 8 is an enlarged view of the vicinity of the second flow-promoting cavity portion 51 near the joint surface 12 between the glass upper side portion 2 and the glass run corner portion 4, which is surrounded by a broken line in FIG. It corresponds to part B. FIG. 9 shows the second flow promoting cavity portion 51 and the material injection gate 43 in FIG.
The positional relationship between a and the glass run corner portion 4 along the longitudinal direction is shown. The broken line in FIG. 9 represents the position of the joint surface 12 between the upper portion 2 of the grass run and the corner portion 4 of the grass run.

The material injection gate 43a provided in the third cavity portion 47 is the second portion corresponding to the vehicle interior thin portion 11a.
The product shape space 40 with respect to the distribution promotion cavity portion 51
Are formed so as to be apart from each other by a predetermined distance toward the central position side along the longitudinal direction of the. As for the material injection gates 43b to 43d, similar to the material injection gate 43a, the central positions along the longitudinal direction of the product shape space 40 with respect to the corresponding first and second flow promoting cavity portions 50 and 51, respectively. It is formed so as to be separated from the side by a predetermined distance.

When the temperature and the inflow pressure of the molten material reaching the joint surfaces 12 and 13 are reduced, it causes the joint strength at the joint surfaces 12 and 13 to be reduced. In this embodiment, the slit 26 is formed in the core 26. By forming
The first flow promoting cavity portion 50 and the second flow promoting cavity portion 51 are provided in the product shape space 40, and the joint surfaces 12, 1
The molten material can be quickly reached and filled to the tips of the second cavity portion 46 and the fourth cavity portion 48 at the three positions. Therefore, in each of the joint surfaces 12 and 13, the inner seal lip 10, 10 formed thinly is formed.
It is possible to improve the joint strength between them and the joint strength between the vehicle outer side seal lips 8 and 8 respectively.
It is possible to prevent the peeling off of the adhesion between the vehicle interior seal lip 10 and the vehicle exterior seal lip 8 at 2 and 13.

Further, the slit 30 formed in the core 26
By forming the opposed wall surfaces 31, 31 in a tapered shape, it is possible to improve the mold release property from the core 26 of the glass run corner portion 4.

[Brief description of drawings]

FIG. 1 is a perspective view showing a corner portion of a grass run according to the present invention.

FIG. 2 is an explanatory view showing a corner portion of the grass run according to the present invention.

FIG. 3 is a perspective view of a molding die for molding a glass run corner portion according to the present invention.

FIG. 4 is an explanatory view showing a procedure for mounting the upper part of the grass run on the core.

FIG. 5 is an enlarged view of part A of FIG.

FIG. 6 is an explanatory view showing a product shape space of a glass run corner portion defined in a molding die according to the present invention.

FIG. 7 is a sectional view of a main part of a molding die according to the present invention.

FIG. 8 is an enlarged view of part B in FIG.

FIG. 9 is an explanatory view showing a positional relationship along a longitudinal direction of a glass run corner portion between a second flow promoting cavity portion and a material injection gate.

FIG. 10 is an explanatory view showing a corner portion of a conventional grass run.

FIG. 11 is a cross-sectional view of a mold for molding a conventional glass run corner portion.

[Explanation of symbols]

20 ... Mold 40 ... Product shape space 43 ... Material injection gate 45 ... 1st cavity part 46 ... Second cavity part 47 ... Third cavity part 48 ... Fourth cavity part 49 ... Fifth cavity 50 ... 1st circulation promotion cavity part 51 ... Second circulation promoting cavity portion

Claims (4)

[Claims] 1. A glass run having a main body having a substantially U-shaped cross section and thin seal lips extending from the ends of both side walls of the main body toward the bottom wall of the main body at the end of the straight line portion of the extruded glass run. In the molding die for molding the corner portion, the product shape space corresponding to the product shape of the glass run corner portion defined in the molding die has a material injection gate for injecting the molten material into the product shape space. A first cavity portion that is provided and corresponds to one side wall of the glass run corner portion, a second cavity portion that corresponds to one seal lip extending from the one side wall, and a molten material is injected into the product shape space. A material injection gate is provided, the third cavity portion corresponding to the other side wall of the glass run corner portion, and the other cavity extending from the tip of the other side wall. A fourth cavity portion corresponding to the lulip, and a fifth cavity portion corresponding to the bottom wall, and a first flow-promoting cavity portion extending over the first cavity portion and the second cavity portion; A second flow promoting cavity portion extending over the cavity portion and the fourth cavity portion is formed in the vicinity of the joint position with the grass run straight portion, and the material injection gate provided in the first cavity portion is ,
The material injection gate formed in the position close to the first flow promoting cavity and provided in the third cavity is formed in the position close to the second material flowing cavity. Mold for glass run corner part. 2. The first and second flow promoting cavities are formed by providing a slit in the core of the molding die, the slit being orthogonal to the longitudinal direction of the product shape space. The mold for forming a glass run corner portion according to claim 1. 3. The wall surfaces of the slit facing each other are formed in a taper shape, and the thickness of the thin portion of the glass run corner portion formed by the material in the slit is determined by the side wall and the seal lip continuous with each other. The molding die of the glass run corner portion according to claim 2, wherein the valley portion side of the formed gap having a substantially wedge-shaped cross section is formed thicker than the tip side of the seal lip. . 4. A molding structure of a glass run corner portion molded at an end of an extruded glass run straight portion, the main body having a substantially U-shaped cross section, and a bottom of the main body from a tip of a vehicle outer side wall of the main body. In the molding structure of the grass run corner portion, which has a vehicle outer seal lip extending toward the wall and a vehicle inner seal lip extending toward the bottom wall from the tip of the vehicle inner side wall of the main body, Straddling the side wall and the vehicle outer seal lip, straddling the vehicle outer side thin portion that is thinner than the thickness of the vehicle outer side seal lip, the vehicle inner side wall and the vehicle inner side seal lip, A vehicle-inside thin portion, which is thinner than the wall thickness, is formed in the vicinity of the joining position with the straight line portion of the glass run, and the vehicle-outside thin-walled portion near the vehicle-side sidewall and the vehicle-side sidewall on the vehicle. Forming structure of glass run corners, wherein a molten material to shape from a side thin portion near the position of the glass run corner is injected.