JPH10217309A - Extrusion molding mold and coating method using the mold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the dispersion of resin size, to moderate the required precision of adhesive application on a molding, to obviate the need for preparing an excessive resin and adhesive, to eliminate unnecessary work to strip off an applied resin, and prevent the generation of burrs. SOLUTION: A resin is extruded from a right side opening part 11 and a left side opening part 12, and a molding 100 engaged between the engagement parts 14A, 14B of an extrusion molding mold 1 is sent in its longitudinal direction 100A so that the adhesion surfaces 101A, 101B and the open part 102 of the molding 100 are coated with the resin continuously. In this process, the molding 100 is positioned by the engagement parts 14A, 14B. Since the resin extruded from the first extrusion channel of the opening part 11 and the first extrusion channel of the opening part 12 is pressurized while being slanted to the adhesion surfaces 101A, 101B of the molding 100, the resin is pressed strongly and smoothly to the adhesion surfaces 101A, 101B of the molding 100.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extrusion molding die for continuously covering an adhesive surface of a molded article and an open portion formed in the longitudinal direction thereof with a resin, and a coating method using the extrusion molding die. About.

[0002]

2. Description of the Related Art Conventionally, bonding surfaces 101A and 101B of a molded article 100 shown in FIG. 9 and an opening 102 formed in the longitudinal direction thereof are formed by a resin 1 having a shape as shown in FIG.
In order to continuously coat with 03, the extrusion molding die 110 shown in FIG. 11 was used. That is, the already molded product 10
0 through the mold 110, the molded article 100
A gap is formed between the mold 110 and the entire circumference of the mold, the resin is extruded into the gap, and the molded article 100 is fed in the longitudinal direction, as shown in FIG. The periphery is continuously covered with the resin 103, and thereafter, the unnecessary part 1 shown in FIG.
By peeling 04, the adhesive surfaces 101A and 101B and the opening 102 of the molded article 100 were continuously covered with the resin 103 having the shape shown in FIG. The resin 103 having the shape shown in FIG.
02 is cut along a ridge line (the center line in the longitudinal direction of the pre-formed product 100) formed on the upper surface 02.

[0003]

However, since the molded article 100 is processed by roll forming or the like and has poor dimensional accuracy, as the molded article 100 is fed in the longitudinal direction, the inside of the mold 110 is reduced. At 100
Since the width of the gap formed over the entire circumference of fluctuates,
A resin 103 having a shape shown in FIG. 10 and continuously covering the adhesive surfaces 101A and 101B and the opening 102 of the molded article 100.
In some cases, variations occurred in the dimensions of the samples.

[0004] Further, the bonding surface 101A of the pre-formed product 100,
Resin 103 which continuously covers 101B is a molded article 1
00, the adhesive surfaces 101A, 101B are firmly integrated via the adhesive applied to the adhesive surfaces 101A, 101B.
Although it is necessary to apply an adhesive to 101B, an unnecessary portion 1 of resin 103 shown in FIG.
If the adhesive oozes out on the surface of the molded article 100 covered with 04, the unnecessary portion 104 is firmly integrated with the surface of the molded article 100, and it becomes difficult to peel off the unnecessary portion 104. Therefore, when applying the adhesive to the bonding surfaces 101A and 101B of the molded article 100, high accuracy is required.

[0005] Further, like an unnecessary portion 104 of the resin 103 shown in FIG.
Since the resin 103 must be once coated to a portion that does not directly serve any purpose for continuously coating the A, 101B and the opening 102, the actual bonding of the molded article 100 is performed. Compared with the amount of the resin 103 that continuously covers the surfaces 101A and 101B and the opening 102, a considerably large amount of extra resin 103 has to be prepared. Further, the same applies to the adhesive, and the molded article 1
As compared with the amount of the adhesive applied to the adhesive surfaces 101A and 101B of No. 00, a considerably large amount of extra adhesive had to be prepared.

[0006] In addition, the operation of peeling off the unnecessary portion 104 of the resin 103 shown in FIG. 13 is directly related to continuously covering the bonding surfaces 101 A and 101 B and the opening 102 of the molded article 100. Is a task that has nothing to do, and is a wasteful task in that sense.

[0007] To solve these problems, for example, by using a "method of integrally forming a gasket with a frame member" described in JP-A-6-198701,
If the resin 103 having the shape shown in FIG. 10 can be continuously extruded onto the bonding surfaces 101A and 101B and the opening 102 of the molded article 100, the molded article 100 is passed through the mold 110 and molded. Resin 103 around the entire circumference of the product 100
Is not required to be continuously coated, so that the dimensions of the resin 103 having the shape shown in FIG.
When applying the adhesive to the adhesive surfaces 101A and 101B of the molded article 100, no high accuracy is required, and a considerably large amount of extra resin 103 or adhesive is not prepared, and the resin shown in FIG. There is no need to perform the work of stripping the unnecessary portion 104 of 103.

However, a "method of integrally forming a gasket on a frame material" described in JP-A-6-198701.
The heat-curable rubber is extruded vertically onto an adhesive surface such as in the concave engagement portion of the metal frame material, and the heat-curable rubber is formed by a shape formed from a gap between the mold and the concave engagement portion of the metal frame material. While forming the shape of the above, it is a method of integrating with the concave engagement portion of the metal frame material, if such a method is used for the molded article 100, with the variation in dimensions of the molded article 100,
Inconsistency in dimensional accuracy occurs in the gap with the mold, and in particular, the resin may protrude from the end of the mold and burrs may occur.

Accordingly, the present invention has been made to solve the above-mentioned problems, and it is intended to prevent a variation in resin dimensions, relax the required accuracy of applying an adhesive to an already-formed product, and provide a considerably large amount. An extrusion mold and a coating method using the extrusion mold which can eliminate unnecessary work such as peeling off the coated resin without the need to prepare an extra resin or an adhesive and can prevent generation of burrs. The purpose is to provide.

[0010]

According to a first aspect of the present invention, there is provided an extrusion molding die for continuously covering an adhesive surface of a pre-formed product with a resin. Forming a first mold for introducing the resin, a second mold for heating the resin extruded from the first mold, and a first extrusion channel through which the resin that has passed through the second mold is extruded. The third
And a mold. The extrusion mold according to a second aspect is the extrusion mold according to the first aspect, wherein the first extrusion flow path of the third mold has an inclination angle with respect to an adhesion surface of a pre-formed product. And a pressing portion for pressing the resin toward the adhesive surface of the molded article is provided.

Further, an extrusion molding die according to claim 3 is the extrusion molding die according to claim 1 or 2,
A core that fits through an opening formed continuously in the longitudinal direction of the formed article is connected to the first mold and the second mold, and a core that protrudes from the second mold. A second extrusion flow path is formed with a gap with the third mold, and a resin extruded from the second extrusion flow path and a first extrusion of the third mold are formed.
The present invention is characterized in that an adhesive surface and an open portion of a preformed product are continuously covered with a resin extruded from an extrusion channel.

A coating method according to a fourth aspect of the present invention is a coating method using an extrusion molding die for continuously coating an adhesive surface of a molded article with a resin, wherein an adhesive is applied to the adhesive surface in advance. An extruded mold according to any one of claims 1 to 3 is used for an already molded product.

In the extrusion mold of the present invention having such a configuration, the first mold, the second mold, and the third mold are connected in order, and the flow of the resin in each mold is restricted. It continues to be continuous. Therefore, the resin introduced into the first mold from an extruder or the like is heated when passing through the second mold,
Further, by passing through the first extrusion flow path of the third mold, it is extruded to the adhesive surface of the already-formed product. In addition, by passing through the second extrusion channel, it is extruded toward the open part of the molded article. The resin is formed into a coating shape by passing through the first extrusion channel and the second extrusion channel.

At this time, the resin extruded onto the adhesive surface of the molded article is pressurized in the flow direction of the first extrusion flow path inclined with respect to the adhesive surface of the molded article. The resin can be extruded smoothly onto the surface. at the same time,
Since the resin is pressed against the adhesive surface of the molded article at the pressing portion of the first extrusion channel, the resin can be strongly pressed to the adhesive surface of the molded article.

Further, if an adhesive is applied in advance to the bonding surface of the preformed product, the resin pressed on the bonding surface of the preformed product can be firmly integrated. At this time, since the resin is not pressed on the surface other than the adhesive surface of the molded product,
The adhesive may protrude on the surface other than the adhesive surface of the molded article.

[0016] Further, by fitting the open portion of the molded article through the cores connected to the first mold and the second mold, the molded article sent in the longitudinal direction can be part of the extrusion mold. Therefore, the guide surface can be guided while sliding on the core, so that the adhesive surface of the molded article can always be brought into close contact with the first extrusion flow path of the third mold. Therefore, unlike the prior art, there is no gap between the bonding surface of the pre-molded product and the first extrusion channel of the third mold.

Also, since the pre-formed product is sent in the longitudinal direction while the open portion is inserted into the core, the second product formed with a gap between the core protruding from the second die and the third die.
Immediately below the extrusion channel, the opening of the molded article is always sent. Therefore, the resin extruded from the second extrusion flow path is extruded toward the open portion of the molded product.
Since the resin is extruded from the first extrusion flow path of the third mold and is continuously extruded with the resin pressed to the adhesive surface of the molded product, the adhesive surface and the open portion of the molded product can be continuously covered. .

That is, in the extrusion molding die of the present invention and the coating method using the extrusion molding die, the first extrusion flow channel which is always in close contact with the adhesion surface of the molded article, and the opening of the opening of the molded article are provided. Since the resin is extruded from the second extrusion channel always located directly above, there is no variation in the dimensions of the coated resin. In addition, since the resin is not pressed onto the surface other than the adhesive surface of the molded product, the required accuracy of the application of the adhesive to the molded product can be relaxed. There is no need to prepare, and wasteful work such as stripping the coated resin can be omitted. Further, since there is no gap between the adhesive surface of the molded article and the first extrusion flow path of the third mold, no burrs are generated.

Further, since the pressing portion is provided in the first extrusion channel inclined with respect to the bonding surface of the pre-formed product, the resin extruded from the first extrusion channel can be applied to the bonding surface of the pre-molded product. Since the compression can be performed smoothly and strongly, it is possible to sufficiently secure the pressure of the resin against the adhesive surface of the molded article.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an outline of an extrusion mold according to an embodiment of the present invention. The extrusion molding die 1 according to the embodiment of the present invention has a bonding surface 10 of the molded article 100 like the resin 103 having the shape shown in FIG.
1A, 101B and the opening 102 are continuously covered. On the lower surface of the extrusion mold 1, a molded article 100
Are provided with fitting portions 14A and 14B for fitting a part of.

The fitting is performed by the fitting portion 1 of the extrusion mold 1.
The molded article 100 is attached to the core 13 located between 4A and 14B.
Of the extrusion molding die 1
The bonding surface 10 of the molded article 100 is
1A and 101B are brought into contact with each other. Therefore, the molded article 100 sent in the longitudinal direction 100 </ b> A can be guided while sliding on the core 13 which is a part of the extrusion mold 1.

The extrusion die 1 is provided with a right opening 11 and a left opening 12. The right opening 11 and the left opening 12 are adjacent to each other on the center line (corresponding to the line BB) of the extrusion die 1 and are symmetric with respect to the center line. However, the right opening 11 and the left opening 12 do not continue. The right opening 11 has an outlet 11A of the first extrusion channel 30 (see FIG. 7) engraved on the right side of the third die 1C of the extrusion die 1 and a third die 1C of the extrusion die 1. The outlet 11B of the right second extrusion channel 32 (see FIG. 6) formed with a gap between the core 13 and the core 13 is connected. Similarly, the left opening 12 is provided with the first extrusion channel 31 engraved on the left side of the third die 1C of the extrusion die 1.
The outlet 12A of the extrusion die 1 (see FIG. 7) and the outlet 12B of the left second extrusion flow path 33 (see FIG. 6) formed with a gap between the third die 1C of the extrusion die 1 and the core 13 are connected. It was done.

Since a part of the molded article 100 is fitted into the fitting portions 14A and 14B of the extrusion mold 1, the outlet of the first extrusion flow path 30 (see FIG. 7) of the right opening 11 is formed. 11
A and the outlet 12A of the first extrusion channel 31 (see FIG. 7) of the left opening 12 are provided with the adhesive surfaces 101A, 1A,
01B are in close contact with each other, and immediately below the outlet 11B of the second extrusion channel 32 (see FIG. 6) of the right opening 11 and the outlet 12B of the second extrusion channel 33 (see FIG. 6) of the left opening 12. , The open part 102 of the molded article 100 is located.

Further, the first extrusion channel 30 of the right opening 11
The resin extruded from the outlet 11A of the second extrusion channel 32 (see FIG. 6) and the outlet 11A of the second extrusion channel 32 (see FIG. 6) are integrally extruded from the right opening 11. Similarly, the outlet 1 of the first extrusion channel 31 (see FIG. 7) of the left opening 12
2A and the resin extruded from the outlet 12B of the second extrusion channel 33 (see FIG. 6) are integrally extruded from the left opening 12. The resin extruded from the right opening 11 is pressed against the bonding surface 101A of the molded article 100 and covers the right half of the opening 102 of the molded article 100. Similarly, the resin extruded from the left opening 12 is pressed against the adhesive surface 101B of the molded article 100 and covers the left half of the open part 102 of the molded article 100.

Therefore, the fitting portions 14A, 1
The molded article 100 fitted in 4B is in its longitudinal direction 100.
A, the adhesive surfaces 101A, 101B and the opening 102 of the molded article 100 are continuously formed by the resin 2 like the resin 103 having the shape of FIG. 10 described in the section of the prior art.
3 can be coated. Note that the shape of the resin 23 in FIG. 1 is the same as the shape of the resin 103 in FIG.
Is the same as

Next, the structure of the extrusion mold 1 will be described with reference to FIGS. As shown in FIG. 2, the extrusion mold 1 includes a first mold 1A, a second mold 1B, and a third mold 1A.
C is composed of three molds. In the first mold 1A, a mounting hole 2 for an extruder is provided on a side surface thereof,
By attaching the tip of the extruder 40 (see FIG. 8) to the extruder mounting hole 2, the resin can be introduced into the extrusion molding die 1. Although not shown, a part of the fitting portions 14A and 14B is provided below the core, and a core 13 is formed therebetween.

The second mold 1B has a built-in heater 17 (see FIG. 6) so that the resin introduced into the extrusion mold 1 can be heated and maintained at a constant temperature. Also, with reference to FIG. 3 which is a perspective view of the extrusion mold 1 from which the third mold 1C is removed, near the center of the second mold 1B, the first mold 1A to the third mold 1C A flow path 5 for introducing a resin into is provided. Four fixing holes 4 are provided at the four corners. Further, a core 13 protrudes toward the third mold 1C in the lower center, and a part of the fitting portions 14A, 14B is provided on both sides of the core 13.
The core 13 is connected to the core 13 of the first mold 1A.

In the third mold 1C, as shown in FIG. 4, a right opening 11 (FIG.
11A) of the first extrusion channel 30 (see FIG. 7).
And the first extrusion channel 31 of the left opening 12 (see FIG. 1).
(See FIG. 7) are provided respectively. In addition, four fixing holes 3 are provided at the four corners. Also, with reference to FIG. 5, which is a perspective view of the third mold 1C as viewed from the inside, the second mold 1B is provided at the center thereof.
A groove 15 for filling the resin introduced from the flow path 5 is provided. The groove 15 spreads in a wing shape, and on both sides thereof, the first extrusion flow channel 30 of the right opening 11 (see FIG. 1).
(See FIG. 7), and a first extrusion channel 31 (see FIG. 7) of the left opening 12 (see FIG. 1) are provided, respectively.

The second mold 1B and the third mold 1C are fixed to the first mold 1A with fixing bolts through fixing holes 3 and 4, as shown in FIG. At this time, the core 13 of the second mold 1B
Are formed between the upper surface of the first die and the concave portion of the third die 1C. The second extrusion channels 32 and 33 (see FIG. 6)
One of them communicates with the groove 15 (see FIG. 5) provided in the second mold 1B, and the other communicates with the outlet 11B (see FIG. 1) of the second extrusion flow path 32 (see FIG. 6) of the right opening 11. ) Or the outlet 12B (see FIG. 1) of the second extrusion channel 33 (see FIG. 6) of the left opening 12. Also,
At the lower side of the third mold 1C, a part of the fitting portions 14A, 14B is formed on both sides of the core 13. First mold 1
A, the respective fitting portions 14A, 1B of the second mold 1B and the third mold 1C.
4B are connected and form one fitting part 14A, 14B.

Next, a method for continuously covering the bonding surfaces 101A and 101B and the open portion 102 of the molded article 100 using the extrusion molding die 1 will be described. FIG. 8 shows a part of a production facility in which the extrusion die 1 is used.
Here, the coating process in this equipment will be described in order.
First, the adhesive surfaces 101A and 101B of the molded article 100 are degreased and coated with an adhesive. Then, in the heater 35 whose output can be adjusted by the control panel 34, the adhesive applied to the adhesive surfaces 101A and 101B of the molded article 100 is baked. As the adhesive, a thermosetting material such as "KBS17" manufactured by Konishi Co., Ltd. is used.
The conditions at this time are as follows.
Baking for about a minute is performed.

After the adhesive is baked, the molded product 10 is passed through rollers provided on the four centering guides 42.
0 is sent to the extrusion mold 1 suspended from the suspension portion 43 of the centering guide 42 at the most downstream while maintaining a constant line in the longitudinal direction 100A. The extrusion mold 1 is attached to the tip of an extruder 40, and the resin kneaded by the extruder 40 is extruded through the extrusion mold 1 to form an adhesive surface 10 of the molded article 100.
1A, 101B and the opening 102 are continuously coated. In addition, as a material of the resin 23, a vinyl chloride resin or the like is used.

Next, the flow of the resin in the extrusion mold 1 will be described with reference to FIGS. FIG. 6 shows a central cross section of the extrusion die 1 taken along the line BB in FIG. FIG. 7 shows one side cross section of the extrusion molding die 1 cut along the line AA or the line CC in FIG. As shown in FIG. 6, the resin extruded from the extruder 40 is the first mold 1A.
Is supplied into the extrusion molding die 1 through the mounting hole 2 for the extruder (see FIG. 2), and after being filled in the resin reservoir 16 of the first die 1A, it is extruded into the flow path 5 of the second die 1B. It is. Second mold 1
A heater 17 is built in around the flow path 5 of B, and the temperature of the resin supplied into the extrusion mold 1 can be kept constant. Then, via the flow path 5 of the second mold 1B,
It is extruded into the groove 15 of the third mold 1C.

As shown in FIG. 7, the resin filled in the groove 15 of the third mold 1C is subjected to the first extrusion flow of the right opening 11 provided at both ends of the groove 15 of the third mold 1C. The air flows into the passage 30 or the first extrusion channel 31 of the left opening 12 and is pressurized. The first extrusion channels 30 and 31 are the same
The resin in the first extrusion channels 30 and 31 is smoothly extruded onto the adhesive surfaces 101A and 101B of the pre-molded article 100, respectively. Further, the right opening 1
In the vicinity of 1 and the left opening 12, pressing portions 30A and 31A for pressing the resin toward the bonding surfaces 101A and 101B of the molded article 100 are provided in the first extrusion flow paths 30 and 31, respectively. Therefore, the first extrusion channels 30, 3
1 are bonded to the bonding surfaces 101A, 101 of the molded article 100.
B can be strongly pressed.

As shown in FIG. 6, the resin filled in the groove 15 of the third mold 1C is filled with the concave portion of the third mold 1C and the second mold at the center of the groove 15 of the third mold 1C. Second extrusion channel 3 formed with a gap with the upper surface of core 13 of mold 1B
2 and 33, respectively, and are pressurized. The resin in the second extrusion channel 32 is the outlet 11B at its tip (see FIG. 1).
, And the resin in the second extrusion flow path 33 is extruded from an outlet 12B (see FIG. 1) which is the tip thereof. At this time, as shown in FIG. 1, each of the second extrusion channels 32 and 33 communicates with the first extrusion channels 30 and 31 (see FIG. 7) in front of the right opening 11 and the left opening 12. Therefore, the resin extruded from the second extrusion channels 32 and 33 is continuously extruded with the resin extruded from the first extrusion channels 30 and 31 (see FIG. 7). Therefore, the adhesive surfaces 101A and 101B and the opening 102 of the molded article 100 can be continuously covered with the resin extruded from the right opening 11 and the left opening 12.

As described in detail above, in the extrusion molding die 1 of the present embodiment, the first die 1A, the second die 1B, and the third die 1C are connected in order. The flow of the resin in the mold continues. Therefore, the resin introduced into the first mold 1A from the extruder 40 or the like is heated when passing through the second mold 1C, and further flows through the first extrusion channels 30 and 31 of the third mold 1C. By passing through, it is extruded to the bonding surfaces 101A, 101B of the pre-formed product 100. In addition, by passing through the second extrusion channels 32 and 33, it is extruded toward the opening 102 of the molded article 100. Then, by passing through the first extrusion channels 30, 31 and the second extrusion channels 32, 33, the resin 2
3 is formed in the covering shape of FIG.

At this time, the bonding surface 101 of the molded article 100
Since the resin extruded to A and 101B is pressurized in the flow direction of the first extrusion flow path 3031 that is inclined with respect to the bonding surfaces 101A and 101B of the pre-molded product 100, The resin 23 can be smoothly extruded to 101B. At the same time, the first extrusion channel 3
In the pressing portions 30A and 31A of the 0 and 31, the already-formed product 1
Since the resin 23 is pressed against the adhesive surfaces 101A and 101B of the molded product 100,
The resin 23 can be strongly pressed to A and 101B.

Further, the bonding surface 101 of the molded article 100
Since the adhesive is applied to A and 101B in advance, the resin 23 bonded to the adhesive surfaces 101A and 101B of the molded article 100 can be firmly integrated. At this time, since the resin 23 is not pressed onto the surface of the molded product 100 other than the bonding surfaces 101A and 101B, the adhesive may protrude on the surface of the molded product 100 other than the bonding surfaces 101A and 101B. .

Further, by fitting the opening 102 of the molded article 100 into the core 13 connected to the first mold 1A and the second mold 1B, the molded article 10 fed in the longitudinal direction is
0 can be guided while sliding on the core 13 which is a part of the extrusion molding die 1, so that the bonding surfaces 101A and 101B of the pre-molded product 100 can be connected to the first extrusion flow channel 30 of the third die 1C. 31 can always be in close contact. Therefore, unlike the prior art, the bonding surface 101A of the molded article 100,
There is no gap between 101B and the first extrusion channels 30, 31 of the third mold 1C.

Also, the molded article 100 has its open portion 102
Is sent in the longitudinal direction while passing through the core 13, the core 13 protruding from the second mold 1 </ b> B and the third mold 1 </ b> C
The opening 102 of the molded article 100 is always sent directly below the second extrusion flow paths 32 and 33 formed with a gap between them. Accordingly, the resin extruded from the second extrusion channels 32 and 33 is extruded toward the open portion 102 of the molded article 100. At this time, the resin is extruded from the first extrusion channels 30 and 31 of the third mold 1C. Bonding surface 1 of the molded article 100
01A and 101B, and are continuously extruded with the resin 23 that is to be pressed onto the bonding surface 101A, 101B.
B and the opening 102 can be continuously coated.

That is, in the extrusion molding die 1 of the present invention and the coating method using the extrusion molding die 1, the first extrusion channels 30, 31 that are always in close contact with the bonding surfaces 101 A, 101 B of the molded article 100. And the opening 10 of the molded article 100
Since the resin is extruded from the second extrusion flow paths 32 and 33 always located directly above the second resin 2, there is no variation in the dimensions of the coated resin 23. Further, since the resin 23 is not pressed onto the surface other than the bonding surfaces 101A and 101B of the molded article 100, the required accuracy of applying the adhesive to the molded article 100 can be relaxed, and a considerable amount of extra It is not necessary to prepare a suitable resin 23 or an adhesive, and it is possible to eliminate useless work such as stripping the coated resin 23. In addition, the bonding surfaces 101A, 101B of the already-formed product 100
Since there is no gap between the first extrusion channels 30 and 31 of the third mold 1C, no burrs are generated.

Further, the adhesive surface 101A of the molded article 100,
The pressing portions 30A and 31A are provided in the first extrusion flow paths 30 and 31 inclined with respect to 101B, so that the resin 23 extruded from the first extrusion flow paths 30 and 31 is bonded to the bonding surface of the molded article 100. Since it can be smoothly and strongly pressed to 101A and 101B, the molded article 10
0 can sufficiently secure the pressure of the resin against the bonding surfaces 101A and 101B.

It should be noted that the present invention is not limited to the above embodiment, and various changes can be made without departing from the gist of the present invention. For example, the extrusion mold 1 of the above embodiment
Since the outlet 11A of the first extrusion channel 30 of the right opening 11 and the outlet 11B of the second extrusion channel 32 continue in the right side opening 11, it is extruded from the outlet 11A of the first extrusion channel 30 of the right opening 11. The resin and the resin extruded from the outlet 11B of the second extrusion channel 32 are continuously and integrally extruded from the right opening 11, but the resin 11 and the outlet 11A of the first extrusion channel 30 of the right opening 11 are connected to the second extrusion channel. The resin extruded from the outlet 11B of the second extrusion channel 32 immediately adheres to the resin extruded from the outlet 11A of the first extrusion channel 30 and is melted by making the outlet 11B of the channel 32 independent. You may do so. As a result, the adhesive surface 101A of the molded article 100 and the right half of the opening 102 can be continuously covered.

The first extrusion channel 31 of the left opening 12
In the same manner, the outlet 12A of the second extrusion channel 33 and the outlet 12B of the second extrusion channel 33 can continuously cover the bonding surface 101B of the molded article 100 and the left half of the opening 102. From the above, the bonding surfaces 101A, 10A,
1B and the opening 102 can be continuously coated.

[0044]

According to the extrusion molding die and the coating method using the extrusion molding die of the present invention, the first extrusion flow channel which is always in close contact with the adhesive surface of the molded article, and the opening of the opening of the molded article are provided. Since the resin is extruded from the second extrusion channel always located directly above, there is no variation in the dimensions of the coated resin. In addition, since the resin is not pressed onto the surface other than the adhesive surface of the molded product, the required accuracy of the application of the adhesive to the molded product can be relaxed. There is no need to prepare, and wasteful work such as stripping the coated resin can be omitted. Further, since there is no gap between the adhesive surface of the molded article and the first extrusion flow path of the third mold, no burrs are generated.

Further, since the pressing portion is provided in the first extrusion channel inclined with respect to the bonding surface of the preformed product, the resin extruded from the first extrusion channel can be applied to the bonding surface of the preformed product. Since the compression can be performed smoothly and strongly, it is possible to sufficiently secure the pressure of the resin against the adhesive surface of the molded article.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an outline of an extrusion mold.

FIG. 2 is a perspective view of an extrusion molding die.

FIG. 3 is a perspective view of an extrusion mold with a third mold removed.

FIG. 4 is a perspective view of a third die of the extrusion die as viewed from the outside.

FIG. 5 is a perspective view of a third die of the extrusion die as viewed from the inside.

FIG. 6 is a center sectional view of the extrusion mold cut along a line BB in FIG. 1;

FIG. 7 is a side sectional view of the extrusion mold cut along a line AA or a line CC in FIG. 1;

FIG. 8 is a perspective view of a production line using an extrusion mold.

FIG. 9 is a perspective view of a molded product.

FIG. 10 is a perspective view of a molded article in which an adhesive surface and an open portion are continuously covered with a resin.

FIG. 11 is a front view of a conventional mold.

FIG. 12 is a front view of a pre-molded product in which the entire circumference is covered with a resin using a conventional mold.

FIG. 13 is a front view of a pre-formed product after stripping unnecessary portions from a resin covering the entire circumference.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Extrusion mold 1A 1st mold 1B 2nd mold 1C 3rd mold 13 Core 30, 31 1st extrusion flow path 30A, 31A Press part 32, 33 2nd extrusion flow path 100 Already molded article 101A, 101B Adhesive surface of preformed product 102 Open part of preformed product

Claims (4)

[Claims] 1. An extrusion molding die for continuously covering an adhesive surface of an already molded article with a resin, a first die for introducing a resin, and a second die for heating the resin extruded from the first die. An extrusion molding die comprising: a die; and a third die having a first extrusion flow passage through which the resin that has passed through the second die is extruded. 2. The extrusion molding die according to claim 1, wherein the first extrusion flow path of the third die is provided with an inclination angle with respect to an adhesion surface of a pre-formed product, and adheres the pre-formed product. An extrusion die, wherein a pressing portion for pressing a resin toward a surface is provided. 3. The extrusion molding die according to claim 1, wherein the core that fits into an open portion formed continuously in the longitudinal direction of the formed product is formed by the first die and the second die. A second extrusion flow path is formed with a gap between the third mold and a core protruding from the second mold and connected to the second mold, and is extruded from the second extrusion flow path. An extrusion molding die, wherein an adhesive surface and an open portion of a pre-formed product are continuously covered with a resin which has been extruded and a resin extruded from a first extrusion flow path of the third die. 4. A coating method using an extrusion molding die for continuously coating an adhesive surface of a molded article with a resin, wherein the adhesive is applied to the molded article in advance. A coating method using the extrusion mold according to claim 3.