JPH0459208A - Mold forming and connecting section structure for glass run - Google Patents

Abstract

PURPOSE:To carry finishing of flashes with easy workability and provide a mold forming and connecting section with a rib of given shape by forming patterns transferred from the pattern provided on the rib molding surface of a molding die on the surface of the rib of the mold forming and connecting section. CONSTITUTION:Flashes 52, 53 and 55 formed by a rubber material entered parting lines 62, 63 and 64 are on a connecting section 3C molded by a cavity 7 at the time of molding forming. Also, a flash 51 formed by a rubber material entered a parting line 61 is at the end of a rib 4. Patterns 40 transferred from the pattern on the molded surface of a rib molded section 70 are formed on both sides of the rib 4. The flashes 52, 53 and 54 are cut from their roots and removed therefrom. The flash 51 is cut and removed from a pattern 40 of the rib 4 as a boundary. As a result, a flash finished mold forming and connecting section 3C with the rib 4 of given shape is formed. The rib and the flashes can be identified and the rib can be removed accurately in the given shape by said arrangement.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a molded connection portion of a glass run attached along the inner periphery of an automobile door sash.

[Prior Art] Taking the front corner part of a glass run (section G in Fig. 1) as an example, as shown in Fig. 7, the corner part is a connection in which extruded glass runs 3A and 3B are connected by molding. It is formed by part 3C.

In this case, in order to improve the sealing performance with the door sash,
A thin rib 4 (with a thickness of about 0.5 to 1 mm) is formed on the surface to be mated with the door sash. This rib 4 is formed during molding (Japanese Patent Application Laid-Open No. 61-220917
issue).

However, during molding, the rubber material from the molding inevitably enters the parting line, resulting in 52.
53 occurs. Paris 51 also occurs at the tip of the rib 4.

After molding, these pars are removed with scissors or the like to give a paris finish. By the way, these Paris and the above rib 4
Because the distinction between rib 4 and
It is possible that the root can be removed from the root. Also rib 4
Care and skill are required to remove the paris 51 from the tip in an accurate shape, and the workability is extremely poor.

[Problems to be Solved by the Present Invention] In view of the above-mentioned circumstances, the present invention has been made with the object of realizing a molded joint structure for a glass run that allows for accurate and workable finishing while leaving the ribs. It is something.

[Means for Solving the Problems] As illustrated in FIG. 2, the present invention is made by transferring a pattern provided on the rib molding surface of a molding die onto the surface of the rib 4 of the molding connection part 3c. It is characterized in that a pattern 40 is formed.

"Function/Effect" The above-mentioned pattern makes it easy to distinguish between ribs and burrs.Therefore, it is possible to perform a crisp finish with ease of workability, and it is possible to obtain a molded joint having ribs of a predetermined shape. .

[Embodiment] In FIG. 1, a glass run 3 is attached to a door sash 11 of a door 1 along its inner periphery to seal around a door glass 2.

At the front corner part G of the glass run 3, as shown in FIG. 2, glass runs 3A and 3B made of extruded rubber are connected by a corner-shaped molded connection part 3C. A rib 4 protrudes like a tongue from the surface of the molded connection portion 3C that is mated to the door sash 11, and a pattern 40 having a textured uneven surface is formed on the surface of the rib 4.

The molded connecting portion 3C is molded by setting the ends of the glass runs 3A and 3B facing each other at a predetermined angle in the cavity of the mold in which the connecting portion 3C is to be molded, and injecting a rubber material into the cavity. Ru.

FIG. 4 shows a cross section of the mold 6 that forms the cavity 7. The mold 6 is composed of a plurality of mold members, and parting lines 61, 62, 63, 64 between them are A rib molding portion 70 is provided using the two 61. The molding surface of the molding portion 70 is engraved with a grain-like uneven pattern.

FIG. 3 shows the molded connection part as it has been molded by the cavity 7. As shown in FIG. The connecting portion 3C has burrs 52, 53, 55 (burrs 5) caused by the rubber material that entered the parting line 62, 63, 64 (Fig. 5) during molding.
5 does not appear in the figure). Further, burrs 51 are also formed at the tips of the ribs 4 due to the rubber material that has entered the parting line 61.

On both sides of the rib 4, a pattern 40 is formed by transferring the pattern of the molding surface of the rib molding section 70.

Thus, the burrs 52, 53, 54 are removed from their roots. The burr 51 is removed along the pattern 40 of the rib 4 as a boundary. As a result, as shown in FIG. 2, a mold-formed connecting portion 3C having ribs 4 of a predetermined shape and having a crisp finish is obtained.

The present invention, which forms a pattern on the rib surface to distinguish between ribs and burrs, is applicable not only to the molded connection portion 3C of the front corner G of the glass run but also to other molded connection portions.

5 and 6 show an embodiment in which the present invention is applied to portion H in FIG. 1, in which a molded connection portion 3E is formed at the end of an extruded glass run 3D. As shown in FIG. 5, a shelf-shaped rib 4a is integrally molded on the lower edge of the connecting portion 3E in the circumferential direction.

Further, the connecting portion 3E has an extension portion 31. As shown in FIG. 6, these ribs 4a and extension portions 31 are inserted between the door inner panel 12 and the upper rear end of the door trim 13 that covers it to form a gap between the glass run 3 and the door trim 13. It serves as a seal. This rib 4
Although a burr 55 is also generated around the tip during molding, the rib 4a and the burr 55 can be distinguished by forming a pattern 40 on the surface of the lip 4a as in the previous embodiment, and the rib 4a can be accurately formed. It can be cut into a predetermined shape.

Note that the pattern 40 is for distinguishing between ribs and burrs, so it is not limited to a specific pattern.

[Brief explanation of drawings]

Figure 1 is a front view of a car door with a glass run;
Figures 4 to 4 show an embodiment in which the present invention is applied to part G in Figure 1, Figure 2 is a perspective view of the molded connection part, and Figure 3 is a perspective view of the molded connection part.
The figure is a perspective view of the molded connection before finishing, Figure 4 is a sectional view of the mold for forming the molded connection, and Figures 5 and 6 are
The figures show an embodiment in which the present invention is applied to the H part in Fig. 1, Fig. 5 is a perspective view of the molded connection part, and Fig. 6 is a diagram showing the location of the ribs of the molded connection part. , FIG. 7 is a perspective view of a conventional molded connection portion corresponding to FIG. 3. 11...Door sash 2...Door glass 3...Glass run 3A, 3B, 3D...Extrusion molded glass run 3
C13E...Mold molding connection part 4.4a...Rib 40...Pattern 51.52.53...Paris 6...Mold 61.62.63.64... Parting line 7... Cavity 70... Rib molding part Figure 3 Figure 4 Figure 5 Figure 1 Figure 2 Figure 7Figure 6

Claims (1)

[Claims] A molded joint of a glass run installed along the inner circumference of an automobile door sash, the molded joint having a thin rib protruding from its surface to improve sealing performance with the door sash, A glass run molding connection structure characterized in that a pattern formed by transferring a pattern provided on the rib molding surface of a molding die is formed on the surface of the rib.