JPH01242226A - Cap structure for profile extrusion molding - Google Patents

Abstract

PURPOSE:To mold a hollow seal section with good accuracy by flowing a material through a recessed section formed along the moving direction of movable cap at a discharge outlet corresponding with the hollow seal section formed on the movable cap when a weather strip having a partially varied welt section connecting position of the hollow seal section is extrusion molded. CONSTITUTION:A welt section 3 is formed with a given section shape by a solid rubber material extruded out of a main discharge, outlet 13 of a fixed cap 11 together with a core bar 2. A sponge rubber material is fed into an auxiliary outlet 22 of a movable cap 21 through a material inlet 16 and a recessed section 25 to form a hollow seal section 4. A material flows from the material feeding inlet 16 into the auxiliary discharge outlet 22 of the movable cap 21 through the recessed section 25, and as the recessed section 25 is formed along the moving direction of the movable cap 21 and the auxiliary discharge outlet 22 is located at its end, the material inflowing direction is almost constant even it the movable cap 21 is moved to vary the welt section 3 connecting position of the hollow seal section 4, and molding with good accuracy can be carried but.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention provides a weather strip in which a hollow seal part is formed attached to a welt part, and the welt 11 (connection position of the hollow seal part is partially changed). This invention relates to a W-shaped extrusion die structure for extrusion molding.

Conventional technology In normal extrusion molding, molded products with the same cross-sectional shape are continuously formed. becomes a fixed number. but,
For example, if it is possible to partially change the connection position of the welt i1 of the hollow knoll portion according to the positional relationship between the vehicle body flange and the downstream panel surface, a good knoll can be achieved.

Therefore, conventionally, attempts have been made to perform 5Y-shaped extrusion molding in which the cross-sectional shape of the extruded product is partially changed by changing the discharge port shape of the die during continuous extrusion molding.

For example, JP-A-59-171735 discloses a die structure for extruding a weatherstrip into a profile7). It consists of a fixed cap and a movable cap, and the fixed cap has an approximately linear main discharge port corresponding to the welt part at 1°Y.
A substantially C-shaped sub-discharge [ ] corresponding to the hollow knurl portion is formed in the movable 11-karat gold. The movable mouthpiece is movable along the width direction of the main discharge 1'' of the fixed mouthpiece. In addition, a relatively large concave jM< is formed on the back side of the metal plate, connecting the material plate 1 provided on the fixed base with the sub-discharge 1 on the movable metal side. There is.

4- By not moving the movable nozzle during extrusion molding, the position of the approximately C-shaped sub-discharge port changes, and the connection position corresponds to the well l-i'l< of the hollow seal part. It is possible to change everything.

Problems to be Solved by the Invention However, in the conventional die structure described above, when the movable metal is moved in order to change the cross-sectional shape of the molded product,
The inflow direction of the material supplied to the sub-discharge [1 will change significantly. That is, in FIG. 6, 3I is a substantially C-shaped sub-discharge formed on the movable base 32, 21.33 is a recess formed on the back surface of the movable base 32, and 3 and 1 are formed on the fixed base side. 6J
When the metal 32 has moved the most in the direction of the arrow, the material flows into the sub-discharge port 31 from the left in the figure; conversely, when it has moved the most in the direction of the arrow B, the material flows from the right in the figure. Inflow. At the intermediate position, the material flows from the top of the substantially C-shaped hollow sole.

Therefore, as a result of the large change in the direction of material inflow, the cross-sectional shape of the hollow seal part itself tends to be different, and the wall thickness of each part tends to be uneven. It's difficult. Ta.

Means for Solving the Problems Therefore, the present invention provides a fixed 1-1 gold plate in which a 1 degree discharge 1 corresponding to a developed welt part is formed.
In the profile extrusion molding die structure comprising a movable die which is movable along the width direction of the discharge opening and has a sub-discharge opening corresponding to the hollow knoll portion, A recess extending along the direction of the moving force of the IiJ-1 gold is formed on the back surface of the movable cap, and through this recess,
Materials installed on the fixed cap side [1 and! - The above-mentioned sub-discharge port [J] is placed in communication with the sub-discharge port [J] at the end of the bipedal recess, so that the material flows into the sub-discharge port [J] from one direction. There is.

The sub-discharge [1 formed in the action movable Ll gold has iiJ movement [-
The material flows through the recess formed along the direction of movement of the gold. Here, the sub-discharge port No. 7 is concave; 9:1
Since the material is located at the position, even if all the +jJ moving ports are moved, the sub-discharge]1 and the material source [-1 will only approach and separate, and the material inflow direction will not change.

Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

First, an example of a weather strip l manufactured using the 171 gold structure of the present invention will be explained based on FIG. This weather strip l has a cross-sectional path in which the core metal 2 is embedded [1-shaped welt j1<3] and a hollow knoll portion formed incidentally on the outer surface of this approximately U-shaped welt portion 3. 4, and is extrusion molded with the welt part 3 developed in a straight line as shown in the figure. ”−
The welt portion 3 is made of, for example, solid rubber, and the hollow seal 11 and 4 are made of, for example, rubber rubber, and these are simultaneously extruded by known double extrusion molding. In this invention, by changing the shape of the 1-1 gold discharge [1], the connection position of the hollow seal portion 4 to the welt, curvature <3 is partially changed. In other words, in the connection position shown by the solid line, the hollow seal part 4 is located on one side when the welt part 3 is bent into a substantially [1-shape], and in the connection position shown by the imaginary line, the hollow seal part 4 is located on the other side. The hollow seal 1S4 will be located, and the hollow seal portion 4 will be formed at an appropriate position between them.

1 to 3 show "1" for profile extrusion molding according to the present invention.
An example of a gold structure is shown.

This [ ] gold structure is a fixed mouth that is fixed to an extrusion molding machine (not shown)! Gold 11 and this fixed cap! It is roughly divided into R, which can be moved in one direction with respect to l;

]-The fixed cap 11 has a substantially disk shape, and a guide recess I2 is formed in a band shape along the radial direction on the surface thereof. Both ends of the L guide recess 12 are open,
And it is recessed in the rectangular cross section. A main discharge port 13 having a cross-sectional shape corresponding to the felt part 3 is formed through the guide along one inner surface 12a of the guide 4rM<12. 13 is a nozzle holder 5 which communicates with the solid rubber material passage rM<14 inside the extrusion molding machine and which supplies the core metal 2.
is placed on the back side (see Figure 3).

Incidentally, this 1 mm discharge ['' 13 has a shape in which one side of the L guide recess 12 portion is open to the guide recess ffi<12.

Further, a material hole 16 is formed in a position near one end of the guide recess I2. As shown in FIG. 3, this material line D16 communicates with a material passage section 18 for rubber rubber, which is partitioned by a partition wall 17 inside the extrusion molding machine. In addition, Gono + 4 chargers [
116 is located at 1:S of the guide recess 1112 toward the inner surface 12b on the opposite side to the discharge port I3 side.

On the other hand, the movable metal 21 has a substantially rectangular block shape and is adapted to fit into the guide recess ff112 of the fixed metal 11 relatively tightly and with sliding capability. However, one side surface 211 of the movable cap 21 is connected to the guide recess 12.
The guide recess 12oiq of the -L outlet 13 is partitioned into a predetermined shape by this. Further, on the side of the L side surface 2Ia of the movable J metal structure 1 and approximately in the center in the longitudinal direction, one sub-discharge 22 or 1 is formed with a cross-sectional shape corresponding to the hollow seal El<4. The end j1 corresponding to the root of the hollow knoll portion 4 is opened to the side surface 21a of [-], and the sub-discharge as shown in [122
If a plurality of pins 2 are formed, the core portion 23 corresponding to the hollow portion will be separated from the movable base 21 body.
It is connected and supported by 4.

Further, as shown in FIG. 4, a recess 25 is provided on the back surface of the i-+J movable mouth 2 base, and extends along the moving direction of the iiJ movable mouth all bases 21. This recess 25 is located at the fixing 1-1.
It was formed to correspond to the gold II material rJ I 6, and the tip is bent into an abbreviated shape.The bend i%<
25 a is formed to surround the foot side discharge port 22 . That is, the sub-discharge port 22 is located at one end of the concave portion 25 at 1° with respect to the moving direction of the movable mouthpiece 21 . Then, the 1-foot side is discharged through the recess 25 [122 and the material population! 6 is connected.

Now, in the entire structure of 1 above, it is fixed together with the core bar 2! The welt portion 3 is formed into a predetermined cross-sectional shape by the solid rubber material extruded from the main discharge 1] 13 of the gold 11. And, the sub-discharge of the 6-engine mouthpiece 21-]2
2 is supplied with a sponge rubber material through the material filling 16 and the recess 25, and the hollow sole portion 4 is formed by dirt. Of course, the two extruded from each discharge ['l+3.22] are in a state of being integrally connected, thereby forming the weather strip l having the cross-sectional shape shown in FIG.

Then, during the continuous extrusion molding, if the metal 21 described in -1- [iJ movement 1] is moved along the guide recess 12, the relative positions of the main discharge port 13 and the sub-discharge port 22 are adjusted. In other words, the connection position of the hollow knoll portion 4 to the welt portion 3 changes. As a result, the welt part 3 connection position of the hollow sole 1M rim 4 is partially aligned by 5 distances.
A strip l can be formed.

Here, the material flows into the sub-discharge port 22 of the 111 working metal 21 through the concave portion 25 from the material source [,116, but the concave portion 25 is i+I! I! lll-1 gold 21
Since the hollow sole is formed along the moving direction of
0) If the movable metal 21 is moved to change the connection position of the welt portion 3, the material inflow direction will be approximately constant. 4-The imaginary lines 16a and +6b in FIG. 22 and the material population 16 simply approach and separate from each other, and the material always flows in from the diagonal L direction of hollow sole: 1≦4. The thickness and cross-sectional shape of each part can be stably obtained regardless of the position of the movable metal 21.

Effects of the Invention As is clear from the explanation in 1-1, according to the five-closed extrusion molding die structure according to the present invention, the inflow direction of the material to the sub-discharge port of the movable die can be controlled regardless of the position of the movable die. It is possible to make it constant. Therefore, it is possible to stably ensure the thickness of the hollow knoll portion and its cross-sectional shape.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the 1-1 gold structure according to the invention, and FIG. 2 is a set 1'1 of the 1-1 structure. condition j
3 is a sectional view taken along the l[l-1it line in FIG. 2, and FIG.
5 is a cross-sectional view showing an example of a weather strip formed by the 21 gold structure of the present invention, and FIG. 6 is an explanatory diagram showing the flow of material in a conventional cap structure. 11... Fixed cap, 13... Main discharge port, 16... Material person [I, 21... Movable cap, 22... Sub-discharge port [1, 2
5... Concavity. Figure 1 Figure 3 Figure 4

Claims (1)

[Claims] (1) A fixed cap with a main discharge port formed through it corresponding to the welt part in the developed shape, and a sub-discharge port configured to be movable along the width direction of the main discharge port and corresponding to the hollow seal part. In a profile extrusion molding die structure comprising a movable die, a concave portion extending along the moving direction of the movable die is formed on the back surface of the movable die, and a fixed die side is formed through the concave portion. The material inlet provided in the material inlet and the sub-discharge port communicate with each other, and the sub-discharge port is arranged at an end of the recess so that the material flows into the sub-discharge port from one direction. A die structure for profile extrusion molding.