JP3028445B2 - Molding having irregularities and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding having irregularities such as characters and patterns on the surface and a method for producing the same. Such a molding is used, for example, for molding a vehicle side protector, a ship, a building material, a general machine, and the like.

[0002]

2. Description of the Related Art Taking a side protector of a vehicle as an example, it is widely practiced to decorate the side protector with characters or patterns. Means for adding characters and patterns include printing and painting. In addition, Japanese Patent Application Laid-Open No. Sho 60-176845.
As described in the official gazette, the core material is punched,
There is a means for integrally forming a resin so that irregularities such as characters and patterns appear on the surface.

[0003]

However, the means by printing and painting lacks a three-dimensional effect and lacks durability. According to the means described in the above publication, the three-dimensional appearance and the durability are improved, but on the other hand, it is disadvantageous in terms of the number of manufacturing steps and the manufacturing cost because the core material needs to be punched in advance.

An object of the present invention is to provide a molding having both a three-dimensional appearance and durability and advantageous in terms of the number of manufacturing steps and manufacturing cost, and a method of manufacturing the same.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to a longitudinal direction.
And a first resin portion made of a first resin and a second
A first longitudinal portion having a second resin portion made of
A portion corresponding to a second resin portion of the first longitudinal portion on a cross section
The first resin is replaced with a first resin,
A second longitudinal portion integrated with a portion corresponding to a grease portion;
And any one of the first resin and the second resin
A model with irregularities characterized in that one of them is foamed
By molding and also the cross section of the molding
At least the first flow path and the second flow path inside the discharge port corresponding to
An extrusion molding device having
A method of manufacturing a rudder, comprising: a first resin or a second resin;
Either of the two resins contains a foaming agent, and the first
A first resin portion made of a second resin and a second resin portion made of a second resin
In the step of forming the first longitudinal portion having the resin portion
Is a first resin in the first flow path and a second resin in the second flow path.
And, on the cross-section, in phase with the second resin in the first portion in the longitudinal direction.
The corresponding portion is replaced by the first resin, and the first
The longitudinal length of the part integrated with the part corresponding to the first resin
In the step of forming the second portion, the first flow path
The first resin is also supplied to the second flow path.
The above problem has been solved by a method of manufacturing a molding having the characteristic unevenness .

According to a sixth aspect of the present invention, the length of the
A core material is provided between the second resin part and the first resin part of the first part of the hand
If it is , unevenness can be made to appear only on one side of the molding.

[0007]

When a resin containing a foaming agent and a resin not containing a foaming agent are integrally extruded from a discharge port of a molding apparatus, the resin has a cross-sectional shape following the discharge port immediately before being extruded from the discharge port. Only the resin containing the foaming agent expands due to the foaming action of the foaming agent, thereby increasing the volume. As a result, irregularities such as characters and patterns appear on the surface of the molding by the volume expansion of the resin containing the foaming agent .

[0008] The second resin portion of the first longitudinal portion and the first resin
When the core material is provided between the grease portions, irregularities appear only on one side of the core material. The side on which the unevenness is not formed can be used as a fixing surface to a vehicle body or the like.

[0009]

FIG. 1 is a perspective view, partially cut away, of a first embodiment of a molding 10 according to the present invention. The molding 10 is made of a first resin made of a first resin containing a foaming agent.
And a second resin portion 14 made of a second resin containing no foaming agent. First resin and second
The resin may be <br/> either allogeneic Heterogeneous except the presence or absence of blowing agents, but sometimes utilize disparate resin, it is necessary to pay attention to the compatibility.

In this embodiment, both the first and second resins are vinyl chloride except for the presence of a foaming agent, and the foaming agent is azodicarbonamide. Other examples of blowing agents include:
Sulfohydrazide-based ones, for example, benzenesulfonyl hydrazide, can be used.

The molding 10 has a core 16 molded. Hereinafter, a process of manufacturing the molding 10 will be described.

FIGS. 2 and 3 show an example of a molding apparatus 20 used to manufacture the molding 10 according to the present invention. The molding device 20 has at least two
What is necessary is just an apparatus which can extrude the kind of resin. This device 20 has a fixed die 22 and a movable die 24. The first resin is supplied from two inlets 26 and 28 to the device 2.
Sent within 0. The second resin is fed into the device from one inlet 30. The first resin sent from the inlet 26 is continuously extruded to the outlet 32. By moving the movable die 24, only one of the first resin sent from the inlet 28 and the second resin sent from the inlet 30 is extruded to the outlet 32.

FIGS. 4 to 7 show only the first resin.
(That is, on the cross section, the second resin of the first longitudinal portion described later
The part corresponding to the part is replaced with the first resin,
Integrated with the part corresponding to the second resin part
ing. 4) shows the operating position of the device when molding the second longitudinal section . The first resin is supplied from the inlet 28 to the fixed die 2
It is sent to 2. Then, it flows to the discharge port 32 of the fixed die 22 through the movable die 24. The second resin is the inlet 30
From the fixing die 22. And movable die 2
4 through the outlet 36 of the stationary die 22. Further, the first resin is fed from the inlet 26 to the fixed die 22 and then flows to the discharge port 32. Only the first resin flows into the discharge port 32. At the same time, the core 16 is fed in the longitudinal direction.

FIGS. 8 to 11 show the first resin and the second resin.
Fig . 3 shows the operating position of the device when forming the first longitudinal portion made of fat . The first resin is supplied from the inlet 28 to the fixed die 2
It is sent to 2. Then, it flows out from the outlet 32 of the fixed die 22 through the movable die 24. The second resin is fed from the inlet 30 to the fixed die 22. Then, it flows to the discharge port 32 of the fixed die 22 through the movable die 24. Further, the first resin is fed from the inlet 26 to the fixed die 22 and then flows to the discharge port 32. The first resin and the second resin flow into the discharge port 32. At the same time core metal 16
Is sent in the longitudinal direction.

By moving the movable die 24,
The mode is switched between a case where only the first resin flows into the discharge port 32 and a case where the first resin and the second resin flow into the discharge port 32. In this way, it is possible to form a second longitudinal portion composed of only the first resin portion 12 and a first longitudinal portion composed of both the first resin portion 12 and the second resin portion.

When both the resin containing a foaming agent and the resin containing no foaming agent are extruded from the discharge port 32, immediately after that, the resin containing the foaming agent expands due to the foaming action and expands in volume. The resin containing no blowing agent maintains its volume. As a result, as shown in FIGS. 12 and 13, irregularities appear on the surface of the molding 10. Since the core metal 16 is molded, no irregularities appear on the back surface of the molding 10.

FIGS. 14 to 16 show a second embodiment of the molding according to the present invention. 13 is a first resin part, and 15 is a second resin part. The molding 11 of this embodiment uses a resin containing a foaming agent as the first resin, and uses a resin containing no foaming agent as the second resin. Then, on one side of the metal core 17, the first resin is molded with the second resin.

When the resin containing the foaming agent and the resin containing no foaming agent are extruded from the discharge port 32, the resin containing the foaming agent expands by the foaming action to increase the volume. The resin containing no blowing agent maintains its volume as it is. As a result, as shown in FIGS. 15 and 16, the second resin portion 15 protrudes in a portion where the first resin is extruded, and irregularities appear on the surface of the molding 10. Since the metal core 16 is molded and the first and second resins are extruded only on one side thereof, no irregularities appear on the back surface of the molding 10.

In the above-described embodiment, in order to facilitate the understanding of the present invention, the unevenness is merely rectangular. However, in the apparatus exemplified above, forming a character, another pattern, or the like in a molding by changing a shape of a resin inflow path or a discharge port, or appropriately controlling a movable die, or the like. Can be.

[0020]

According to the present invention, by molding a molding with a first resin containing a foaming agent and a second resin not containing a foaming agent, irregularities are formed on the surface of the molding by the foaming action of the foaming agent. Therefore, it is possible to obtain a molding excellent in three-dimensional appearance and durability and also economical.

[0021] The first resin portion and
When the core material is provided between the second resin portions, it is needless to say that the strength is excellent, and irregularities are formed only on one side of the molding, so that the mounting to the vehicle body or the like is easy.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a molding according to the present invention, partially cut away.

FIG. 2 is a perspective view of an entire apparatus for manufacturing a molding according to the present invention.

FIG. 3 is a front view of the apparatus of FIG. 2;

4 is a sectional view taken along line 4-4 of the molding apparatus of FIG. 3 when the movable die is moved to a position where only the first resin portion is molded.

FIG. 5 is a sectional view taken along line 5-5 of the molding apparatus of FIG. 3 when the movable die is moved to a position where only the first resin portion is molded.

FIG. 6 is a sectional view taken along line 6-6 of the molding apparatus of FIG. 3 when the movable die is moved to a position where only the first resin part is molded.

7 is a sectional view taken along line 7-7 of the molding apparatus of FIG. 3 when the movable die has moved to a position where only the first resin portion is molded.

FIG. 8 is a sectional view taken along line 8-8 of the molding apparatus of FIG. 3 when the movable die is moved to a position where it is molded integrally with the first resin portion and the second resin portion.

9 is a cross-sectional view of the molding device of FIG. 3 taken along line 9-9 when the movable die is moved to a position where the movable die is molded integrally with the first resin portion and the second resin portion.

10 is a sectional view taken along line 10-10 of the molding apparatus of FIG. 3 when the movable die is moved to a position where the movable die is molded integrally with the first resin portion and the second resin portion.

11 is a sectional view taken along line 11-11 of the molding apparatus of FIG. 3 when the movable die is moved to a position where the movable die is molded integrally with the first resin part and the second resin part.

FIG. 12 is a longitudinal sectional view of a molding extruded from a discharge port.

FIG. 13 is a sectional view taken along line 13-13 of FIG. 12;

FIG. 14 is a perspective view showing a second embodiment of a molding according to the present invention, partially cut away.

FIG. 15 is a longitudinal sectional view of a molding extruded from a discharge port.

FIG. 16 is a sectional view taken along line 16-16 of FIG. 15;

[Explanation of symbols]

 10, 11 Molding 12, 13 First resin part 14, 15 Second resin part 16, 17 Core 20 Device 22 Fixed die 24 Movable die 26, 28, 30 Inlet 32 Discharge port

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁷ Identification code FI B32B 27/06 B60R 13/04 A B60R 13/04 B29C 67/22 // B29K 105: 04 B29L 31:00

Claims (9)

(57) [Claims] 1. A first tree on a cross section in a longitudinal direction.
First resin part made of fat and second resin part made of second resin
And a portion corresponding to a second resin portion of the first longitudinal portion in a cross section.
The first resin is replaced with a first resin,
A second longitudinal portion integrated with a portion corresponding to a grease portion;
And either one of the first resin or the second resin foams
Characterized in that there, molding having irregularities. 2. The method according to claim 1, wherein said first resin is foamed.
Molding with 1 irregularities. 3. The method according to claim 2, wherein said second resin is foamed.
Molding with 1 irregularities. 4. The method according to claim 1, wherein the second resin portion of the first longitudinal portion has a surface.
2. The molding of claim 1, wherein said molding is exposed. 5. The method according to claim 5, wherein the second resin portion of the first longitudinal portion is a first tree.
2. The concave-convex mold according to claim 1, which is embedded in a grease portion.
Ruding. 6. A first resin and a second resin portion of the first longitudinal portion.
The unevenness according to claim 1, wherein a core material is provided between the grease portions.
Molding to do. 7. The longitudinal first portion and the longitudinal second portion.
The molding with irregularities according to claim 1, wherein the cross-sectional areas are different.
Ning. 8. A boundary portion between the second resin portion and the first resin portion.
The unevenness is revealed by becoming a step,
A molding having irregularities according to claim 7. 9. A discharge corresponding to a cross section of a molding.
A pusher having at least a first flow path and a second flow path inside the mouth
Molding with unevenness is manufactured by the extrusion molding device
A foaming agent, wherein one of the first resin and the second resin contains a foaming agent.
Only the first resin portion made of the first resin and the second tree
Forming a first longitudinal portion having a second resin portion made of oil
In the step, the first resin and the second resin
The second resin is supplied to the flow path, and a portion corresponding to the second resin in the first longitudinal portion on a cross section is provided.
Is replaced by a first resin, and a first
The second longitudinal part integrated with the part corresponding to the resin
In the forming step, a first resin is provided in the first flow path,
A method for manufacturing a molding having irregularities, wherein the first resin is also supplied to the second flow path .