JP3330053B2 - Molding method for resin molded product, molding device and lighting device using 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 method for molding a resin molded article having a glittering feeling like glass when light is transmitted, a molding apparatus for molding the resin molded article, and a method using the resin molded article. The present invention relates to a lighting device (including a lighting device having a bulk of resin molded products or a globe, a chandelier, or a decorative article, an ornament, or the like obtained by combining a light source and a resin molded product).

[0002]

2. Description of the Related Art Conventionally, glass is generally used as a component that transmits light and gives a glittering feeling, but there is a problem that the weight becomes heavy.

[0003] Japanese Patent Application Laid-Open No. 62-140301 discloses a lighting fixture that can produce a glittering feeling like glass even when a resin material is used as a cover. This is because when the cover is formed using the resin material, the resin material is foamed to form bubbles inside.

[0004]

However, the bubbles formed by foaming the resin are in a state in which air or gas is enclosed therein, and the air or gas is liable to contain dirt or impurities, so that high light There is a problem in that the light-transmitting portion cannot provide transparency and is unsuitable as a component of a light-transmitting portion of the lighting fixture.

The present invention has been made in view of the above description, and it is an object of the present invention to produce a glittering feeling like glass while being a resin, and to provide a light and inexpensive material.

[0006]

According to a first aspect of the present invention, there is provided a method for molding a resin molded article , comprising the steps of: A step of discharging the molding material from the molding machine cylinder 3 onto one of the dies 4a of the pair of dies 4a and 4b, and discharging the molding material 2 by the pair of dies 4a and 4b. The method includes a compression molding step of forming the molded article 5 by compression molding and a cooling step of cooling the compression molded article 5, wherein the vacuum void 1 is formed in the molded article 5. The molding material 3 in which the vaporized material is vaporized from the molding machine cylinder 3 and the voids have started to be generated is the mold 4a.
The pressure of the molding material 3 compressed in the molding machine cylinder 3 is released at the same time as the discharging, so that the bulk is increased and the void is enlarged. And a pair of molds 4a, 4b
The molded article 5 having a predetermined shape is formed by cooling the molded article 5, and by cooling the molded article 5, the vaporized material is condensed and the resin shrinks to form the vacuum void 1 inside the molded article 5.
As a result, a resin molded product having a glittering feeling like glass can be obtained. Even if a void is formed, the vacuum void 1
It is free from dirt and impurities, and is a resin
And a light and cheap
It can provide valuable products and is useful as a member of lighting equipment
it can.

[0007]請Motomeko second molding method of a resin molded article of the present invention, the molding material 2 of a resin containing a vaporization material is vaporized in the resin fluidizing stage in the molding of the resin from the molding machine cylinder 3 of the pair dies 4a , 4b, and a molding material for discharging a resin molding material 6 containing no vaporized material from a molding machine cylinder 7 over the discharged molding material 2. And the two layers of the molding materials 2, 6 discharged as described above are applied to a pair of molds 4a, 4
b) a compression molding step of forming a molded article 5 by compression molding, and a cooling step of cooling the compression molded article 5, and a layer a having a vacuum void 1 and a layer b not having the vacuum void 1 Are formed to form a molded product 5 on which is laminated. In this case, a vacuum void 1 is formed in the same manner as in claim 1 to obtain a resin molded article having a glittering feeling such as glass, and a layer a having the vacuum void 1 and a layer b not having the vacuum void 1 And a resin molded product having a two-layer structure can be easily formed.

According to a third aspect of the present invention, there is provided a method for molding a resin molded article, comprising: forming a plate-shaped molded article by a method according to the first and second aspects; It is characterized in that it is disposed between another pair of dies 8a and 8b to be formed into a molded product, and is subjected to compression molding by the pair of dies 8a and 8b to obtain a molded product 5b which is a product. In this case, after forming the plate-like molded product 5a, the molded product 5b of a product having an arbitrary shape can be easily formed.

According to a fourth aspect of the present invention, there is provided a method of molding a resin molded product, comprising: molding a resin molding material containing no vaporizing material from a molding machine cylinder onto one of a pair of dies; A molding step of discharging a molding material 2 containing a vaporized material which is vaporized in a resin fluidization step in resin molding in a step of discharging the molding material to be discharged and over the discharged molding material 6 from a molding machine cylinder 3 And a discharging step of discharging a molding material 6 of a resin not containing a vaporized material from the molding machine cylinder 7 on the discharged two layers of the molding materials 6 and 2, and forming the three layers. A compression molding step of compressing and molding the materials 6, 2, and 6 with the pair of dies 4a and 4b to form a molded article 5; and a cooling step of cooling the compression-molded molded article 5; Layer a having 1
Is characterized in that a molded product 5 sandwiched between layers b having no vacuum voids 1 is formed. In the same manner as in claim 2, the vacuum void 1 is formed to obtain a resin molded article having a glittering feeling like glass, and the layer a having the vacuum void 1 is sandwiched by the layer b not having the vacuum void 1. A resin molded product having a layer configuration can be easily formed.

[0010] molding method of a resin molded article according to claim 5 of the present invention, in claim 1 to claim 4, wherein the vaporization material is water. Moisture that can be easily obtained can be used as a vaporizing material for forming the vacuum void 1, and the vacuum void 1 can be easily formed.

According to a sixth aspect of the present invention, there is provided a method for molding a resin molded article according to any one of the first to fifth aspects, wherein the speed and the nozzle diameter when the molding material 2 containing the vaporized material is discharged from the molding machine cylinder 3 are adjusted. It is characterized in that the size and amount of the vacuum void 1 are controlled by changing. Molding machine cylinder 3
The size and amount of the vacuum void 1 can be easily controlled by changing the state of discharging the molding material 2 from the
A resin molded article having the following can be formed.

A method of molding a resin molded article according to a seventh aspect of the present invention is characterized in that, in any one of the first to sixth aspects, the size of the vacuum void 1 is controlled by changing a cooling rate in a cooling step. . By controlling the speed at which the molded article 5 is cooled in the cooling stage, a resin molded article having an appropriate vacuum void 1 can be formed.

[0013] molding method of a resin molded article according to claim 8 of the present invention, in claim 6, characterized by controlling the distribution of vacuum voids 1 by varying the clamping force in the step of performing compression molding. The distribution of the vacuum voids 1 can be easily controlled to form a resin molded product having a desired distribution of the vacuum voids 1.

According to a ninth aspect of the present invention, there is provided a method of molding a resin molded article according to any one of the first to fifth aspects, wherein the molding material 2 containing the vaporized material is discharged into the molding material 2 or onto the surface thereof. It is characterized in that a filler 22 such as glass powder is provided. A filler 22 such as a glass powder is included in addition to the vacuum void 1, so that a resin molded product having a more sparkling feeling can be formed.

According to a tenth aspect of the present invention, there is provided the resin molded article molding method according to the second or fourth aspect, wherein the molding material containing no vaporized material is discharged at a high speed to form a groove-shaped surface on the molded article. It is characterized in that the pattern 9 is formed. The appearance when the pattern 9 is easily formed and light does not pass can be improved.

The method for molding a resin molded article according to claim 11 of the present invention is characterized in that, in claims 1 to 6 , the cooling in the cooling step is performed by rapid cooling with water. When the surface of the molded product 5 is rapidly cooled, the rate of occurrence of the vacuum void 1 changes depending on the shape of the molded product 5.

According to a twelfth aspect of the present invention, there is provided a method for molding a resin molded article according to the first or second aspect, wherein the resin molding material 2 containing a foaming material in addition to the vaporizing material is used. And Not only the vacuum void 1 can be formed by the vaporizing material but also the bubbles 25 can be formed by the foaming material, and a resin molded article having the vacuum void 1 and the bubbles 25 can be formed. This makes it possible to form a resin molded product having a more sparkling feeling with the vacuum void 1 and the air bubble 25 without significantly lowering the light transmittance.

According to a thirteenth aspect of the present invention, there is provided a method of molding a resin molded product, comprising: a molding material discharging step of discharging a resin molding material including a vaporizer from a molding machine cylinder; A kneading step, a compression molding step of compression-molding the kneaded molding material 2 with a pair of molds 4a and 4b to form a molded article 5, and a cooling step of cooling the compression-molded molded article 5; It is characterized in that a vacuum void 1 and a bubble 25 are formed in the molded article 5. The molding material 2 in which the vaporized material is vaporized and voids are generated is discharged from the molding machine cylinder 3, but the molding material 2 compressed in the molding machine cylinder 3 is released at the same time as the discharge, and the bulk is increased. The air becomes entrained in the molding material 2 when the molding material 2 is kneaded. Then, the molded product 5 is compression-molded by the pair of molds 4a and 4b to form a molded product 5 having a predetermined shape.
And a resin molded article having bubbles 25 are formed. This makes it possible to form a resin molded product having a more sparkling feeling with the vacuum void 1 and the air bubble 25 without significantly lowering the light transmittance.

According to a fourteenth aspect of the present invention, there is provided a method of molding a resin molded article, comprising: a molding step of discharging a resin molding material 2 containing a vaporizing material from a molding machine cylinder 3; The kneading step and the kneading molding material 2 are superimposed with a molding material 6 containing no vaporizing material to form a two-layer molding material 2,
6 is compression molded by a pair of dies 4a, 4b
And a cooling step of cooling the compression-molded article 5, wherein the vacuum void 1 and the air bubbles 25 are formed.
Is formed, and a molded product 5 is formed by laminating a layer a 'having the above and a layer b not having the vacuum void 1 or the bubble 25. In this case, the vacuum voids 1 and the air bubbles 25 are formed in the same manner as in the thirteenth embodiment , and the light transmittance is not significantly reduced.
A resin molded product having a more sparkling feeling can be obtained by the vacuum void 1 and the air bubbles 25, and a two-layer structure of a layer a 'having the vacuum void 1 and the air bubbles 25 and a layer b having no vacuum void 1 and the air bubbles 25 is provided. A resin molded product can be easily formed.

According to a fifteenth aspect of the present invention, there is provided a method for molding a resin molded product, comprising: a step of discharging a molding material of a resin containing a vaporizing material from a molding machine cylinder; A kneading step and a molding material 6 containing no vaporizing material are superimposed on top and bottom of the kneaded molding material 2, and three layers of molding materials 6, 2, 6 are compression-molded by a pair of dies 4 a, 4 b to form a molded product 5. And a cooling step of cooling the compression-molded article 5, wherein the vacuum void 1 is formed.
It is characterized in that a molded product 5 is formed in which a layer a 'having the air bubbles 25 is sandwiched between a vacuum void 1 and a layer b having no air bubbles 25. In this case, as in the case of claim 13 , the vacuum void 1
And the air bubbles 25 are formed, and the resin molded article having a more sparkling feeling is obtained by the vacuum void 1 and the air bubbles 25 without significantly lowering the light transmittance.
And a layer b having no vacuum voids 1 or bubbles 25 can be easily formed into a three-layer resin molded product.

According to a sixteenth aspect of the present invention, there is provided an apparatus for molding a resin molded article, comprising: a pair of dies for compression molding;
a molding press 10 having two molding machine cylinders 3 and 7 for discharging resin molding materials 2 and 6 into
It is characterized by comprising a driving means for changing the position of a, a control device 11 for controlling the driving means, a resin dryer 12, a moisture content measuring device 13 for measuring the moisture content of the resin, and a cooling device 14. . A resin containing an appropriate amount of water as a vaporizing material is supplied to the molding machine cylinder 3, a resin not containing the vaporizing material is supplied to the molding machine cylinder 7, and the position of the mold 4a is changed to convert the molding machine cylinder 3 into a vaporizing material. The molding material 2 containing water is supplied to the mold 4a, and the molding material 6 containing no vaporizing material is supplied from the molding machine cylinder 7 to the mold 4a.
a, 4b are clamped and compression-molded, and the compression-molded molded product 5 is cooled by a cooling device 14 to form a resin molding in which a layer a having a vacuum void 1 and a layer b having no vacuum void 1 are laminated. Articles can be manufactured automatically.

The lighting device according to claim 17 of the present invention provides the light source 1
5, a bulk, a decoration arranged adjacent to the light source 15,
In a lighting device including a resin member 16 such as a globe,
The resin member 16 is formed of a resin molded product in which a layer a having a vacuum void 1 and a layer b having no vacuum void 1 are laminated. The resin member 16 serving as a bulk or decoration is
It is a resin molded product having a vacuum void 1 having a structure as shown in FIG.
When passing the light from the light source 15
Lighting can be performed with a sense of dazzling. Further, the lamp image of the lamp serving as the light source 15 can be erased due to a difference in the refractive index between the layer a having the vacuum void 1 and the layer b having no vacuum void 1.

The lighting device according to claim 18 of the present invention, claim
17 , the layer on the light source 15 side of the resin molded product is a layer a having the vacuum void 1. in this case,
Since the outer surface side opposite to the light source 15 side is the layer b having no vacuum void 1, an image whose appearance is close to glass can be obtained.

According to the illuminating device of the nineteenth aspect of the present invention,
5, a bulk, a decoration arranged adjacent to the light source 15,
In a lighting device including a resin member 16 such as a globe,
The resin member 16 is formed of a resin molded product in which a layer a having a vacuum void 1 is sandwiched by a layer b having no vacuum void 1. In this case, an image closer to glass and a feeling of mass close to glass can be obtained.

The lighting device according to claim 20 of the present invention, the 請
Claims 17 to 19 are characterized in that a groove-shaped pattern 9 is provided in a resin surface layer of a resin molded product. In this case, the appearance can be improved by the pattern 9 even when the light from the light source 15 does not pass.

The lighting device according to claim 21 of the present invention, the 請
Claims 17 to 20 are characterized in that the resin molded article including the vacuum void 1 includes a filler 22 having a different bending ratio from the resin of the resin molded article. In this case, the filler 22 can provide a more sparkling feeling.

The lighting device according to claim 22 of the present invention, the 請
Claims 17 to 21, wherein the size of the vacuum void 1 is 0.5 to 2.0 mm in diameter. As a result, it is possible to obtain a glittering feeling close to that of glass.

The lighting device according to claim 23 of the present invention, the 請
The flash 28 of the molded product 5 according to claim 17 to claim 22 .
After cutting, a part obtained by melting the part is used as a resin member. The surface of the portion from which the burrs 28 have been removed can be made smooth and transparent, and an illuminating device having a greatly different glittering feeling can be obtained.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment corresponding to the method for molding a resin molded product according to claim 1 of the present invention will be described.

As shown in FIG. 1, the compression molding die 4 is composed of a lower die 4a and an upper die 4b. The molding machine cylinder 3 incorporates a screw 18 therein so that the resin molding material 2 is melted and discharged from a nozzle 19 at the tip. This molding material 2
Is a transparent resin, for example, acrylic resin (PMMA)
It is. The molding material 2 contains a vaporizing material which is vaporized in a fluidized state of the resin. As the vaporizing material, for example, water is used. In the molding machine cylinder 3, the molding material 2 in which the vaporized material is vaporized and the voids have started to be generated is loaded by pressing at a predetermined pressure, and the molding material 2 is discharged from the nozzle 19 by driving the screw 18. The molding material 2 is injected onto the mold 4a as shown in FIG. Nozzle 19
When the molding material 2 is discharged from the container, the pressure is released, and FIG.
As shown in (b), the bulk increases and the voids increase. At this time, the voids are at a level that can be visually judged during the time when they are opened to the atmosphere. After injecting the molding material 2 onto the mold 4a, the mold 4a and the mold 4b are clamped as shown in FIG. 1 (c) and compression-molded to form a molding 5, and the compression-molded molding is formed. 5 is taken out as shown in FIG. 1D, and the molded article 5 is cooled in the cooling unit 20. Molded product 5
By cooling the resin, the vaporizing material is condensed and the resin shrinks to form the vacuum void 1 inside the molded product 5 as shown in FIG. 2, and the resin molded product according to claim 1 of the present invention is formed. Since the voids of the molded product 5 are the vacuum voids 1, they are free from dust and impurities, and can be a resin that has a glittering feeling like glass. At this time, the mechanism for forming the vacuum void 1 will be described in detail as follows. The resin containing the high-temperature vaporized material discharged from the molding machine cylinder 3 grows as a void when the pressure is released. By further cooling the resin, a temperature difference is generated between the surface and the inside of the resin molding material 2. As a result, the temperature of the surface of the resin (thermoplastic resin) molding material 2 is lowered, and when the resin is cured first, the internal resin having a high temperature is pulled on the cured surface to further grow voids or to form new voids. The occurrence of voids occurs. In the molding stage, the vaporized material is a void containing gas due to vaporization of the vaporized material. The vaporized material is condensed to become a vacuum void 1 which is condensed and reduced in pressure as the temperature of the resin molding material 2 decreases.

Next, an embodiment corresponding to the method for molding a resin molded product according to claim 2 of the present invention will be described.

As shown in FIG. 3, the upper plate 1 of the forming press 10
A mold 4b such as an upper mold is attached to the lower surface side of Oa, and a mold 4a such as a lower mold is disposed on the upper surface side of the lower plate 10b of the molding press 10. The mold 4a is the lower plate 1.
0b so that the mold 4a can be driven by the driving means.
1 is controlled. On the upper plate 10a, a molding machine cylinder 3 for discharging a molding material 2 containing water as a vaporizing material and a molding machine cylinder 7 for discharging a molding material 6 containing no vaporizing material are arranged. The molding material 6 is a transparent resin, for example, an acrylic resin (PMM
A). A resin material is supplied to the molding machine cylinder 3 from a material supply unit 3a, and a resin material is supplied to the molding machine cylinder 7 from a material supply unit 7a.
The material supply unit 3a is provided with a resin dryer 12 for drying the resin to adjust the amount of water as a vaporizer, and a water content measuring device 13 for measuring the water content of the resin. The amount of voids can be adjusted by adjusting the amount of moisture.
Then, as shown in FIG. 3 (a), the molding material 2 in which the vaporizing material is vaporized and voids are generated is discharged from the molding machine cylinder 3 with the mold 4a positioned below the molding machine cylinder 3. The molding material 2 is filled in the mold 4a. At this time, the molding material 2 is released from the pressure, so that the molding material 2 becomes bulky and the void expands. The resin of the molding material 2 is an acrylic resin, and the resin temperature is 230 ° C. The molds 4a, 4b
Has a mold temperature of 50 ° C. Next, as shown in FIG. 3 (b), the mold 4a is positioned below the molding machine cylinder 7, and a transparent molding material 6 containing no vaporized material is discharged from the molding machine cylinder 7 and overlaps the molding material 2. To fill.
Next, as shown in FIG. 3C, the mold 4 is placed below the mold 4b.
With the position a, the molds 4a and 4b are clamped and compression molded to form a molded product 5. The mold clamping force at this time is 100 ~
It is about 200 kg / cm ² , and the position of the void can be adjusted by adjusting the mold clamping force. The molded article 5 molded as described above is cooled by the cooling device 14. In the case of this example, for example, water cooling is performed for 10 to 20 seconds. By changing the cooling state, the size of the void can be adjusted. The molded article 5 thus formed has a two-layer structure of a layer a having the vacuum void 1 and a layer b having no vacuum void 1. Further, in the layer a having the vacuum void 1, a glittering feeling like glass is obtained when light is transmitted, and the appearance when light is not transmitted can be improved by the layer b having no vacuum void 1.

Next, an embodiment corresponding to the method for molding a resin molded product according to claim 3 of the present invention will be described.

This embodiment is also basically the same as the above-described first and second embodiments, except that a plate-like molded product 5 is formed.
After forming a, a molded product 5b to be a product is formed. As shown in FIG. 4 (a), the molding material 2 is discharged from the molding machine cylinder 3 to fill the mold 4a with the molding material 2, and then, as shown in FIG. 4 (b), the dies 4a, 4b
And compression molding is performed to form a plate-like molded product 5a. Next, a plate-like molded product 5 is manually placed between the molds 8a and 8b.
4a is inserted as shown in FIG. 4 (c), and compression molding is performed by the molds 8a and 8b to form a molded product 5b as a product.
The molded product 5b is cooled by the cooling device 14 as shown in FIG. In this case, after forming the plate-like molded product 5a, the molded product 5b of a product having an arbitrary shape can be easily formed.

Next, an embodiment corresponding to the method for molding a resin molded product according to claim 4 of the present invention will be described.

In this case, molding is performed as follows using the same equipment as that of the second embodiment. First, as shown in FIG. 5 (a), a resin molding material 6 containing no vaporizer is discharged from a molding machine cylinder 7 onto a mold 4a, and then, as shown in FIG. 5 (b). A resin molding material 2 containing a vaporizing material is stacked on a cylinder 3 of a molding machine.
5C, and then, as shown in FIG. 5C, a resin molding material 6 containing no vaporizing material is superposed on the two layers of molding materials 6 and 2.
Is discharged from a molding machine cylinder 7 and the three layers of molding materials 6, 2, and 6 are compression-molded with a pair of dies 4a and 4b to form a molded product 5, and the compression-molded molded product 5 is cooled. Apparatus 1
Cool at 4. In this way, a molded product 5 in which the layer a having the vacuum void 1 is sandwiched by the layer b having no vacuum void 1 is formed. In this case, when the vacuum void 1 is formed in the molded product 5 and light is transmitted, the vacuum void 1 has a glittering feeling like glass, and the layer a having the vacuum void 1 is formed.
Has a three-layer structure sandwiched between layers b having no vacuum voids 1, so that a product having good appearance with no voids on the surface can be obtained.

Next, an embodiment corresponding to the method of molding a resin molded product according to claim 5 of the present invention will be described.

When molding is performed using the same equipment as in the second embodiment, water is used as a vaporizing material, and the state of voids is controlled by controlling the water content.
As shown in FIG. 6, when the resin is supplied from the resin supply unit 3a, the degree of drying of the resin is adjusted by the resin dryer 12 while measuring the amount of water with the water content measuring device 13, and a certain moisture content (1
５5%) to supply to the molding machine cylinder 3 so that the amount of voids can be adjusted. Further, the following method can be adopted as a method of controlling the moisture as the vaporizing material. That is, the moisture content can be controlled by exposing the molding material 2 to an atmosphere of a constant temperature and a constant humidity for a fixed time. By controlling the moisture content in this way, the size of the vacuum void 1 can be controlled. Examples of the temperature, humidity, and time are, for example, a temperature of 60 to 80 ° C., a humidity of 90% or more, and a time of 4 to 5 hours.

Next, an embodiment corresponding to the method for molding a resin molded product according to claim 6 of the present invention will be described.

In the case of this example, the size and amount of the voids are controlled by changing the speed and the nozzle diameter when the molding material 2 containing the vaporized material is discharged from the molding machine cylinder 3. That is, the nozzle 1 of the molding machine cylinder 3
The relationship between the speed at which the molding material 2 is discharged from the nozzle 9 and the amount of voids is as shown in FIG. 7A, the diameter of the nozzle 19 and the size of the void are as shown in FIG. By changing the state in which the material 2 is discharged, the size and amount of the vacuum void 1 can be easily controlled, and the molded article 5 having an appropriate vacuum void 1 can be formed.

Next, an embodiment corresponding to the method for molding a resin molded product according to claim 7 of the present invention will be described.

In the case of this example, the size of the vacuum void 1 is controlled by changing the cooling rate in the cooling stage. That is, as shown in FIG. 8, the size of the void increases when gradually cooled and decreases when rapidly cooled. By controlling the speed at which the molded product 5 is cooled in the cooling stage, the molded product 5 having an appropriate vacuum void 1 is formed. Can be formed. Thereby, by cooling at an appropriate cooling rate in consideration of the wall thickness of the molded product 5, an appropriate large vacuum void 1 can be formed.

Next, an embodiment corresponding to the method for molding a resin molded product according to claim 8 of the present invention will be described.

In the case of this embodiment, the distribution of the vacuum voids 1 is controlled by changing the clamping force in the stage of performing the compression molding. When the molded product 5 is formed by compression molding as described above, if the mold clamping force is about 20 tons, the void distribution of the molded product 5 is evenly distributed over the whole as shown in FIG. When the mold clamping force is about 60 tons, the distribution of voids in the molded product 5 is concentrated in the thick part as shown in FIG. 9C, and when the mold clamping force is about 40 tons. As shown in FIG. 9B, the void distribution of the molded product 5 is in an intermediate state between FIGS. 9A and 9C.
In this case, the distribution of the vacuum voids 1 can be easily controlled by changing the mold clamping force, and the molded article 5 having a desired distribution of the vacuum voids 1 can be formed.

Next, an embodiment corresponding to the method for molding a resin molded product according to claim 9 of the present invention will be described.

In the case of this example, the filler 22 is disposed in or on the surface of the molding material 2 in a state where the molding material 2 containing the vaporized material is discharged. As shown in FIG. 10A, a molding material 6 containing no vaporizing material is filled on a mold 4a, and a molding material 2 containing a vaporizing material and a filler 2 are placed on the molding material 6.
2 is filled as shown in FIG. 10 (b), and
As shown in FIG. 10C, a molding material 6 containing no vaporizing material is filled and compression-molded as shown in FIG. 10D to form a molded product 5 having a three-layer structure. As the filler 8, glass powder,
There are glass beads, glass pulverized products, resin pulverized products such as PS and PC, and the like. In this case, a filler 22 such as glass powder is included in addition to the vacuum void 1, and a molded product 5 with a more sparkling feeling can be formed by using diffuse reflection due to a change in the refractive index.

Next, an embodiment corresponding to the method for molding a resin molded product according to claim 10 of the present invention will be described.

In this embodiment, a groove-shaped pattern 9 is formed on the surface of the molded product 5 by discharging the molding material 6 containing no vaporizing material at a high speed in the second embodiment. As shown in FIG. 11 (a), when the vaporizing material is vaporized in a state where the mold 4a is located below the molding machine cylinder 3, the molding material 2 which has started to generate voids is discharged from the molding machine cylinder 3 to mold the mold. The molding material 2 is filled in the mold 4a. The resin of the molding material 2 is an acrylic resin, and the resin temperature is 230 ° C. The mold temperature of the molds 4a and 4b is 50 ° C. Then, FIG.
As shown in (b), the mold 4a is placed under the molding machine cylinder 7.
And a transparent molding material 6 containing no vaporized material is discharged from the molding machine cylinder 7 and filled so as to overlap the molding material 2. At this time, the molding material 6 is discharged at a high speed.
Next, as shown in FIG. 11C, the mold 4a is positioned below the mold 4b, and the molds 4a and 4b are clamped and compression-molded to form a molded product 5. The clamping force at this time is about 40 to 80 tons, and the position of the void can be adjusted by adjusting the clamping force. The molded article 5 molded as described above is cooled by the cooling device 14 as shown in FIG. The molded article 5 thus formed has a two-layer structure of a layer a having the vacuum void 1 and a layer b having no vacuum void 1. Further, in the layer a having the vacuum void 1, a glittering feeling like glass is obtained when light is transmitted, and the appearance when light is not transmitted can be improved by the layer b having no vacuum void 1. Also, the groove 9 as shown in FIG. 11E can easily form the pattern 9 and further improve the appearance when light is not transmitted.

Next, an embodiment corresponding to the method for molding a resin molded product according to claim 11 of the present invention will be described.

In the first to sixth embodiments, when the molded product 5 is cooled in the cooling stage, the molded product 5 is rapidly cooled by applying water. When the resin surface is quenched in this manner, the occurrence rate of the vacuum void 1 changes depending on the shape of the molded product 5. The reason for this is that voids are generated due to the extremely different shrinkage times between the surface and the inside of the resin, and that the voids often have smaller diameters as they are rapidly cooled. FIG. 12 shows a petal-shaped globe which is an example of the molded article 5. When rapidly cooled, the amount of the vacuum void 1 generated in the narrow portion c is small, and the amount of the vacuum void 1 generated in the wide portion d is large.

Next, an embodiment corresponding to the method for molding a resin molded product according to claim 12 of the present invention will be described.

In the case of this example, claims 1, 2, and 3
In this embodiment, the molding is performed by using a resin molding material 2 including a foaming material in addition to a vaporizing material. A foaming material is a material in which an appropriate amount of the foaming material is kneaded in a resin, and when the foamed material is put into a mold and compressed, the foaming material is decomposed to generate gas, thereby forming a shape and forming bubbles. When an organic foaming material is used as the foaming material, closed cells in which the cells are closed one by one can be obtained. The materials used as the organic foaming material include besensulfohydrazine-based, azonitrile-based, azocarboxylic-based, diazoacetamide-based, and nitroso compound-based materials. When molding is performed using the resin molding material 2 containing a foaming material in addition to the above-described vaporizing material, not only the vacuum void 1 can be formed by the vaporizing material but also the bubbles 25 can be formed by the foaming material. As shown in (1), a resin molded article having the vacuum void 1 and the bubble 25 can be formed. This makes it possible to form a resin molded product having a more sparkling feeling with the vacuum void 1 and the air bubble 25 without significantly lowering the light transmittance. At this time, the size of the vacuum void 1 is about 0.1 to 2 mm, and the size of the bubble 25 is about 1 to 10 mm. As described above, in the case of the molded article 5 including the vacuum void 1 and the air bubbles 25, an excellent glittering feeling can be obtained. That is,
It is possible to improve the glittering feeling of the air bubbles 25 as compared with the vacuum void 1 alone. Further, if only the air bubbles 25 are used, the light transmittance is deteriorated even if the impurities are not included as much as possible. coming out.

Next, an embodiment corresponding to the method for molding a resin molded product according to claim 13 of the present invention will be described.

[0054] Such an embodiment is the same as the form basically embodiment corresponding to claim 1, but instead of being discharged directly onto mold 4a from the molding machine cylinder 3, a molding material 2 after discharging once After kneading, it is supplied onto the mold 4a. As shown in FIG.
The molding material 2 supplied to 7 is supplied to a molding machine cylinder 3, melted by the molding machine cylinder 3, and once taken out of the molding machine cylinder 3 into the atmosphere. The molding material 2 contains a vaporizing material and is in a stage where voids are generated.
The discharged molding material 2 is kneaded in the atmosphere and
Air 25a is entrained as shown in FIG. The molding material 2 is kneaded while the molding material 2 is heated (this temperature is, for example, 240 ° C. in the case of an acrylic resin). The molding material 2 kneaded as described above is supplied onto a mold 4a as shown in FIG. 14B, and a pair of molds 4a,
4b to form a molded product 5 by compression molding. The molded article 5 molded in this manner has a vacuum void 1 and air bubbles 25 as shown in FIG. Further, the molded article 5 compression-molded as described above has the burrs 2 as shown in FIG.
8 is formed, but the burrs 28 are removed and FIG.
Is performed as follows. First, the burrs 28 of the molded article 5 are removed by cutting, the cut surface is finished by a grinder process, and the surface is melted (the cut surface is heated to about 300 ° C.). This surface melting process is performed by, for example, lightly applying a torch lamp. That is, the surface becomes white like ground glass by deburring or grinder processing, but the surface becomes smooth and transparent by the surface melting processing.

Next, an embodiment corresponding to the method for molding a resin molded product according to claim 14 of the present invention will be described.

This embodiment is basically the same as the second embodiment, except that the molding machine cylinder 3
Is not directly discharged onto the mold 4a, but once discharged, the molding material 2 is kneaded and then supplied onto the mold 4a. The molding material 2 discharged from the molding machine cylinder 3 and kneaded as in the embodiment shown in FIG.
5 (a), and placed on the mold 4a, and in this state, a transparent molding material 6 containing no vaporized material is supplied from the molding machine cylinder 7.
Is discharged and filled so as to overlap the molding material 2 as shown in FIG. Next, the molds 4a and 4b are clamped and compression molded to form a molded product 5, which is cooled. The molded article 5 formed in this manner has a two-layer structure of a layer a ′ having the vacuum void 1 and the bubble 25 and a layer b not having the vacuum void 1 and the bubble 25. Further, the layer a 'having the vacuum void 1 and the air bubbles 25 gives a glittering feeling like glass when transmitting light, and the layer b having no vacuum void 1 and the air bubbles 25 can improve the appearance when light is not transmitted. .

Next, an embodiment corresponding to the method for molding a resin molded product according to claim 15 of the present invention will be described.

This embodiment is basically the same as the second embodiment, except that the molding machine cylinder 3
Is not directly discharged onto the mold 4a, but once discharged, the molding material 2 is kneaded and then supplied onto the mold 4a. As shown in FIG. 16 (a), a transparent molding material 6 containing no vaporizing material is discharged from the molding cylinder 7 and supplied onto the mold 4a, and the molding material 2 kneaded as in the embodiment shown in FIG. On the molding material 6 as shown in FIG. Next, as shown in FIG. 16 (c), a resin molding material 6 containing no vaporized material is discharged from the molding machine cylinder 7 on the two layers of the molding materials 6 and 2, and the three layers of the molding materials 6 and 2 are discharged. 6 is compression-molded by a pair of dies 4a and 4b to form a molded product 5, which is cooled. In this manner, a molded product 5 is formed in which the layer a 'having the vacuum void 1 and the bubble 25 is sandwiched by the layer b having no vacuum void 1 and the bubble 25. In this case, when the vacuum voids 1 and the bubbles 25 are formed in the molded article 5 and light passes through the molded article 5, it has a glittering feeling like glass, and the layer a ′ having the vacuum voids 1 and the bubbles 25 becomes the vacuum void 1. Since it has a three-layer structure sandwiched between layers b having no air bubbles 25, a product having good commercial appearance with no voids on the surface can be obtained.

Next, an embodiment of an apparatus for molding a resin molded product according to claim 16 of the present invention will be described.

This embodiment shows a specific structure of the apparatus described in the molding method of the twelfth aspect . As shown in FIG. 17, a mold 4b such as an upper die is attached to a lower surface of an upper plate 10a of the molding press 10, and a metal such as a lower mold is attached to an upper surface of a lower plate 10b of the molding press 10. The mold 4a is arranged. The mold 4a is movable on the lower plate 10b, and the mold 4a can be driven by driving means, and is controlled by a control device 11 for controlling the position. A molding machine cylinder 3 for discharging the molding material 2 and a molding machine cylinder 7 for discharging the molding material 6 are arranged on the upper plate 10a. A resin material is supplied to the molding machine cylinder 3 from the material supply unit 3a, and the molding machine cylinder 7
Is supplied with a resin material from a material supply unit 7a. The material supply unit 3a and the material supply unit 7a are provided with a resin dryer 12 and a moisture content measuring device 13. The molded article 5 is formed by using this apparatus in the same manner as in the second embodiment.

Next, an embodiment of a lighting device according to claim 17 of the present invention will be described.

As shown in FIG. 18, a lamp 15a as a light source 15 is attached to a lighting fixture body 21, and a globe 1 as a resin member 16 is provided so as to surround the lamp 15a.
6a is attached. The resin member 16 according to claim 2
Vacuum as in the molded article 5 obtained by the molding method of the embodiment
Layer a having void 1 and layer b not having vacuum void 1
It is formed by stacking. Since the globe 16a as the resin member 16 is the molded product 5 having the vacuum void 1 having the above-described structure, the lamp 15 as the light source 15
Ru can be illuminated put a sparkle feeling like glass when passing light from a. Further, the lamp image of the lamp 15a as the light source 15 can be erased due to a difference in the refractive index between the layer a having the vacuum void 1 and the layer b having no vacuum void 1.

Next, an embodiment of a lighting device according to claim 18 of the present invention will be described.

This embodiment is basically the same as the embodiment of the seventeenth aspect, but in the case of this embodiment, as shown in FIG.
The layer on the light source 15 side of the globe 16 a as 6 is a layer a having the vacuum void 1. In this case, since the outer surface side opposite to the light source 15 side is the layer b having no vacuum void 1, an image having an appearance similar to glass can be obtained.

Next, an embodiment of a lighting device according to claim 19 of the present invention will be described.

This embodiment is basically the same as the above embodiment, but in this embodiment, as shown in FIG. 20 , a resin member 16 is formed on a globe 16a by the molding method according to the fourth embodiment. It is formed by a layer a having a vacuum void 1 sandwiched between a layer b having no vacuum void 1 like a product 5.
In this case, an image closer to glass and a feeling of mass close to glass can be obtained.

Next, an embodiment of a lighting device according to claim 20 of the present invention will be described.

This example is basically the same as the above example, but in this example, as shown in FIG. 21 , a glove 16a as a resin member 16 was obtained by the molding method according to the tenth embodiment. Like the molded article 5, a molded article 5 in which a groove-like pattern 9 is provided on a resin surface layer is used. In this case, the light source 15
The appearance can be improved by the pattern 9 even when light from the light is not transmitted.

Next, an embodiment of a lighting device according to claim 21 of the present invention will be described.

The present embodiment is basically the same as the above embodiment . In this embodiment, as shown in FIG. 22 , a layer a having a vacuum void 1 and a vacuum void 1 are formed on a globe 16a as a resin member 16. A molded article 5 having a two-layer structure with a layer b having no molding is used.
Glass powder, glass beads,
A filler 22 such as a crushed glass product or a crushed resin product is included. In this case, the filler 22 can provide a more sparkling feeling.

The size of the vacuum void 1 provided on the resin member 16 is preferably 0.5 to 2.0 mm in diameter.

Next, an embodiment of a lighting device according to claim 23 of the present invention will be described.

This illuminating device is basically the same as the above example, but uses the resin member 16 which has been subjected to the end face treatment described in the embodiment of claim 13 . That is, using the compression molded article 5 having the vacuum void 1 and the molding article 5 having the vacuum void 1 and the bubble 25, the flash 28 of the molded article 5 is used.
Is removed by cutting, and the cut surface is finished by grinder processing.
Perform surface melting treatment (heat the cut surface to about 300 ° C)
The end face is treated. The surface melting treatment makes the surface smooth and transparent, and the glittering feeling as a lighting device is significantly different.

[0074]

According to the present invention, there is provided a resin molded product according to claim 1 of the present invention.
In the molding method , in the molding of the resin, a molding material discharge step of discharging a resin molding material containing a vaporized material which is vaporized in a resin fluidized state from a molding machine cylinder onto one of a pair of molds. A compression molding step of forming a molded product by compression molding the discharged molding material with a pair of molds, and a cooling step of cooling the compression molded product. The molding material is vaporized from the molding machine cylinder, and the molding material that has begun to generate voids is discharged into the mold.The molding material compressed in the molding machine cylinder is released and the pressure is released at the same time as the molding material. Becomes larger, the voids are enlarged, and compression molding is performed with a pair of molds to form a molded article having a predetermined shape. By cooling the molded article, the vaporized material is condensed and the resin shrinks to form an interior of the molded article. Vacuum It is those de is formed, in which a resin molded article with a sense of glitter, such as glass can be easily obtained. Also, even if voids are formed, vacuum
It is free from dirt and impurities, and is a resin
And a light and cheap
It can provide valuable products and is useful as a member of lighting equipment
You can do it.

According to a second aspect of the present invention, there is provided a method for molding a resin molded product, comprising: molding a resin molding material containing a vaporized material vaporized in a resin fluidizing step in resin molding from a molding machine cylinder into one of a pair of dies. A discharging step of the molding material discharged onto the mold, and a discharging step of the molding material discharging the resin molding material containing no vaporized material over the discharged molding material from the molding machine cylinder, as described above. A compression molding step of forming a molded product by compression molding the discharged two layers of molding material with a pair of molds; and a cooling step of cooling the compression molded product, wherein a layer having a vacuum void and a vacuum Since a molded article in which a layer having no voids is formed is formed, a vacuum void is formed in the same manner as in the invention of claim 2 to obtain a resin molded article having a glittering feeling like glass. Layer Those that can easily form a two-layer structure of the resin molded article of the layer having no vacuum voids.

According to a third aspect of the present invention, there is provided a method for molding a resin molded article according to the first or second aspect, wherein a plate-shaped molded article is formed, and then the plate-shaped molded article is molded into a product shape. It is arranged between another pair of molds, and compression molding is performed by the pair of molds to obtain a molded product that becomes a product, so after forming a plate-like molded product, a molded product of a product of any shape is formed. It can be easily formed.

According to a fourth aspect of the present invention, there is provided a method of molding a resin molded product, wherein a resin molding material containing no vaporizing material is discharged from a molding machine cylinder onto one of a pair of dies. A discharging step, a molding material discharging step of discharging a resin molding material containing a vaporized material that evaporates in a resin fluidizing step in resin molding in a resin molding step over the discharged molding material from a molding machine cylinder; and A molding material discharge step of discharging a resin molding material containing no vaporized material from a molding machine cylinder on top of the two layers of molding material, and compression molding the three layers of molding material with a pair of molds and molding. A compression molding step of forming an article, and a cooling step of cooling the compression-molded article, since a layer having a vacuum void forms a molded article sandwiched between layers having no vacuum void,
A three-layered structure in which a vacuum void is formed to obtain a resin molded article having a glittering feeling like glass, and a layer having a vacuum void is sandwiched by a layer having no vacuum void. A resin molded product can be easily formed.

In the method for molding a resin molded product according to the fifth aspect of the present invention, since the vaporized material is water in the first to fourth aspects, water that is easily obtained as the vaporized material for forming a vacuum void is used. Thus, a vacuum void can be easily formed.

According to a sixth aspect of the present invention, there is provided a method for molding a resin molded article according to any one of the first to fifth aspects, wherein the speed and the nozzle diameter when discharging the molding material containing the vaporized material from the molding machine cylinder are changed. By controlling the size and amount of vacuum voids by changing the state of discharging molding material from the molding machine cylinder, the size and amount of vacuum voids can be easily controlled to form a resin molded product with an appropriate vacuum void You can do it.

[0080] molding method of a resin molded article according to claim 7 of the present invention, in claims 1 to 6, and controls the magnitude of the vacuum voids by changing the cooling rate of the cooling phase, in the cooling phase By controlling the cooling rate of the molded article, a resin molded article having an appropriate vacuum void can be formed.

[0081] molding method of a resin molded article according to claim 8 of the present invention, and controls the distribution of vacuum voids by changing the clamping force at the stage of performing compression molding in claim 6, the distribution of vacuum voids It is possible to form a resin molded product having a desired distribution of vacuum voids by easily controlling.

According to a ninth aspect of the present invention, there is provided a method of molding a resin molded article according to the first to fifth aspects, wherein the molding material containing the vaporized material is discharged into the molding material or on the surface thereof. Since filler such as glass powder is arranged in
A filler such as glass powder is included in addition to the vacuum void, so that a resin molded product having a more sparkling feeling can be formed.

According to a tenth aspect of the present invention, there is provided the resin molded article molding method according to the second or third aspect, wherein the molding material containing no vaporized material is discharged at a high speed to form a groove-shaped pattern on the surface of the molded article. Is formed, the pattern can be easily formed, and the appearance when light is not transmitted can be improved.

In the method for molding a resin molded article according to claim 11 of the present invention, since the cooling in the cooling step is performed by rapid cooling with water in claim 1 to claim 6 , the rate of occurrence of vacuum voids depends on the shape of the molded article. That is, it is possible to obtain a molded article having a variable vacuum void distribution.

According to the method for molding a resin molded article of claim 12 of the present invention, since the resin molding material containing a foaming material in addition to the vaporizing material is used in claim 1, 2 or 4 , Not only can form a vacuum void, but also can form air bubbles with a foaming material, and can form a resin molded article having a vacuum void and air bubbles, thereby significantly reducing light transmittance. In addition, a resin molded product having a more sparkling feeling can be formed by the vacuum voids and bubbles.

The method of molding a resin molded product according to the thirteenth aspect of the present invention comprises the steps of discharging a molding material of a resin containing a vaporizer from a molding machine cylinder, and kneading the discharged molding material. A compression molding step of compression molding the kneaded molding material with a pair of molds to form a molded product;
A cooling step of cooling the compression molded article,
Since a vacuum void and air bubbles are formed in the molded product, the molding material in which the vaporized material is vaporized and voids are generated is discharged from the molding machine cylinder, but the molding material compressed in the molding machine cylinder is discharged. At the same time, the pressure is released, the bulk increases, the voids are enlarged, and air is entrained in the molding material by kneading the molding material, and is compressed and molded by a pair of molds to form a molded product of a predetermined shape. The resin molded article having the vacuum voids and bubbles is formed by cooling the molded article, and the vacuum voids and bubbles have a more sparkling feeling without significantly lowering the light transmittance. A resin molded product can be formed.

[0087] molding method of a resin molded article according to claim 14 of the present invention, the delivery phase of the molding material to be discharged a molding material of a resin containing a vaporized material from the molding machine cylinder, comprising the steps of kneading the discharge has been molded material A compression molding step of forming a molded product by superimposing a molding material containing no vaporizer on the kneaded molding material and compressing and molding a two-layer molding material with a pair of molds; and cooling the compression molded molded product. consists of a cooling step of, because it forms a shaped article in which a layer with no layer of vacuum voids and bubbles are stacked with vacuum voids and bubbles, claim 13
Vacuum voids and air bubbles are formed in the same manner as above, and a resin molded article with a more sparkling feeling can be obtained with the vacuum voids and air bubbles without significantly lowering the light transmittance, and further having vacuum voids and air bubbles. It is possible to easily form a resin molded product having a two-layer structure of a layer and a layer having no vacuum voids or bubbles.

[0088] molding method of a resin molded article according to claim 15 of the present invention, the delivery phase of the molding material to be discharged a molding material of a resin containing a vaporized material from the molding machine cylinder, comprising the steps of kneading the discharge has been molded material A compression molding step of forming a molded product by superimposing a molding material containing no vaporizer on the upper and lower sides of the kneaded molding material and compressing and molding a three-layer molding material with a pair of molds; consists of a cooling step of cooling the so forming a sandwiched moldings by layer without a layer or vacuum voids and bubbles having a vacuum voids and bubbles, claim
Vacuum voids and bubbles are formed in the same manner as in 13, and a resin molded product with a more sparkling feeling can be obtained with the vacuum voids and bubbles without significantly lowering the light transmittance. This makes it possible to easily form a resin molded product having a three-layer structure of a layer having a layer and a layer having no vacuum voids or bubbles.

A molding apparatus for a resin molded product according to a sixteenth aspect of the present invention is a molding press comprising a pair of dies for compression molding and two molding machine cylinders for discharging a resin molding material into the dies. And a driving device for changing the position of the mold, a control device for controlling the driving device, a resin dryer, a moisture content measuring device for measuring the moisture content of the resin, and a cooling device. A resin containing an appropriate amount of water is supplied to the molding machine cylinder, and a resin not containing the vaporized material is supplied to the molding machine cylinder.The mold position is changed, and the molding material containing water as the vaporized material is supplied from the molding machine cylinder. Supplying the molding material without vaporizer from the molding machine cylinder while supplying the molding material, clamping the mold, compression molding, and cooling the compression molded product with a cooling device to have a vacuum void Layers and vacuum chambers And a no de layer is capable of automatically producing a laminated resin molded article.

A lighting device according to a seventeenth aspect of the present invention is a lighting device comprising a light source and a resin member such as a bulk , a decoration, and a globe disposed adjacent to the light source.
Resin member that becomes a glove is a resin with a vacuum void
Because it is a molded product, it is a glass when passing light from a light source
It can illuminate with a shimmering feel.
In addition, since the resin member is formed of a resin molded product in which a layer having a vacuum void and a layer having no vacuum void are laminated, the light source becomes a light source due to a difference in refractive index between the layer having a vacuum void and the layer having no vacuum void. The lamp image of the lamp can be turned off.

[0091] Lighting device according to claim 18 of the present invention, 請
In claim 17 , the light source side layer of the resin molded product is a layer having a vacuum void, and the outer surface side opposite to the light source side is a layer having no vacuum void, so that an image having an appearance similar to glass can be obtained. It is.

A lighting device according to a nineteenth aspect of the present invention is a lighting device comprising a light source and a resin member such as a bulkhead, a decoration, and a glove disposed adjacent to the light source, wherein the resin member has a vacuum void. Since the layer is formed of a resin molded product in which the layers are sandwiched by layers having no vacuum void, an image closer to glass and a feeling of mass close to glass can be obtained.

[0093] A lighting device as recited in claim 20 of the present invention, 請
In claims 17 to 19 , since the groove-shaped pattern is provided on the resin surface layer of the resin molded product, the appearance can be improved by the pattern even when light from a light source is not transmitted .

[0094] A lighting device as recited in claim 21, wherein the present invention, 請
In claim 17 to claim 20 , the resin molded article including the vacuum void contains a filler having a different bending ratio from the resin of the resin molded article, so that the filler can give a more glittering feeling. is there.

[0095] The illumination apparatus of claim 22, wherein the present invention, 請
In claims 17 to 21 , since the size of the vacuum void is 0.5 to 2.0 mm in diameter, it is possible to provide a glittering feeling close to that of glass.

The illuminating device according to the twenty- third aspect of the present invention is the illuminating device according to the seventeenth to the twenty-second aspects, wherein the molded product is cut and then melted and then used as a resin member. This makes it possible to obtain a lighting device having a greatly different glittering feeling by making the surface of the portion which is made smooth and transparent.

[Brief description of the drawings]

FIG. 1 is an explanatory view illustrating a molding method according to an embodiment of the present invention, wherein (a), (b), (c), and (d) show respective steps.

FIG. 2 is an enlarged sectional view of a molded article obtained from the above.

FIG. 3 is an explanatory view for explaining a molding method of another example of the above, wherein (a), (b), (c) and (d) show respective steps.

FIG. 4 is an explanatory view illustrating a molding method of another example of the above, wherein (a), (b), (c), and (d) show respective steps.

FIG. 5 is an explanatory view for explaining a molding method of another example of the above, wherein (a), (b), (c), (d) and (e) show respective steps.

FIG. 6 is an explanatory view illustrating a molding method of another example of the above.

FIGS. 7A and 7B are graphs illustrating another example of the molding method according to the embodiment, and FIGS. 7A and 7B show different characteristics, respectively.

FIG. 8 is a graph illustrating a molding method of another example of the above.

FIG. 9 is an explanatory view for explaining a molding method of another example of the above, and (a), (b) and (c) show a state in which a mold clamping force is changed.

FIG. 10 is an explanatory view illustrating a molding method of another example of the above embodiment, wherein (a), (b), (c), and (d) show respective steps.

FIG. 11 is an explanatory view for explaining a molding method of another example of the above, and (a), (b), (c), (d), and (e) show respective steps.

FIG. 12 is an explanatory view illustrating a molded product molded by another molding method of the above.

FIG. 13 is an enlarged cross-sectional view illustrating a molded product molded by another molding method of the above.

FIG. 14 is an explanatory view illustrating a molding method of another example of the above, and FIGS. 14 (a), (b), (c), (d), and (e) are explanatory views illustrating respective steps.

FIG. 15 is an explanatory view for explaining a molding method of another example of the above, and FIGS. 15 (a), (b) and (c) are explanatory views for explaining respective steps.

FIG. 16 is an explanatory view illustrating a molding method of another example of the above, and FIGS. 16 (a), (b), (c), and (d) are explanatory views illustrating respective steps.

FIG. 17 is an explanatory view showing an example of the molding device of the above.
(A) and (b) show different steps.

FIG. 18A is an explanatory diagram of an example of the above lighting device, and FIG. 18B is an enlarged sectional view of a main part.

FIG. 19 (a) is an explanatory view of another example of the above lighting device, and FIG. 19 (b) is an enlarged sectional view of a main part.

20 (a) is an explanatory view of another example of the above lighting device, and FIG. 20 (b) is an enlarged sectional view of a main part.

21 (a) is an explanatory view of another example of the illumination device of the above, (b) is an enlarged sectional view of a main part , and (c) is an arrow direction of (b).
It is the surface view seen from the direction .

FIG. 22A is an explanatory diagram of another example of the above lighting device, and FIG. 22B is an enlarged cross-sectional view of a main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vacuum void 2 Molding material 3 Molding machine cylinder 4a Mold 4b Mold 5 Molded product 6 Molding material 7 Molding machine cylinder 8a Mold 8b Mold 9 Pattern 10 Molding press 11 Control device 12 Resin dryer 13 Water content measuring device 14 Cooling device 15 Light source 16 Resin member 22 Filler 25 Bubbles

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI // B29K 105: 00 B29K 105: 00 B29L 31:00 B29L 31:00 (56) References JP-A-6-41341 (JP, A) JP-A-48-95463 (JP, A) JP-A-48-12368 (JP, A) JP-A-6-91774 (JP, A) JP-A-7-508314 (JP, A) (58) Survey Field (Int.Cl. ⁷ , DB name) B29C 43/02-43/20 B29C 43/32-43/36 B29C 43 / 52,67 / 22 B32B 5 / 18,7 / 02 C08J 9/12-9 / 14 F21V 3 / 04,1 / 26

Claims (23)

(57) [Claims] 1. The method of claim 1, wherein the resin is in a fluidized state during molding.
Cylinder molding resin molding material containing vaporizing material
Of molding material discharged onto one of a pair of molds from
A discharging step, and the discharged molding material is placed in a pair of molds.
Compression molding step of forming a molded article by compression molding,
A cooling step of cooling the compression molded article,
Forming a vacuum void in the molded article;
Molding method for fat molded products. 2. The method according to claim 1, wherein the resin is fluidized during molding.
Cylinder molding resin molding material containing vaporizing material
Of molding material discharged onto one of a pair of molds from
In the discharging step, the vaporized material is superimposed on the discharged molding material.
Discharge resin molding material that does not contain from molding machine cylinder
And the two layers discharged as described above.
The molding material is compression molded with a pair of molds to form a molded product.
Compression molding stage and cooling the compression molded part
And a cooling step, wherein the layer having a vacuum void and the vacuum
A method for molding a resin molded article, comprising forming a molded article in which a layer having no id is laminated . 3. The method according to claim 1 or 2,
After forming a plate-shaped molded product, this plate-shaped molded product is
Placed between another pair of molds to form
A method of molding a resin molded product, comprising obtaining a molded product as a product by performing compression molding with a mold. 4. A resin molding material containing no vaporizer is formed.
From the machine cylinder onto one of a pair of molds
Discharging the molding material, and the discharged molding material
Is vaporized in the resin fluidization stage in resin molding
Discharge resin molding material including vaporizer from cylinder of molding machine
Discharging the molding material to be discharged and forming the discharged two layers.
Molding resin molding material that does not contain vaporizing material on top of the molding material
Discharging the molding material discharged from the machine cylinder;
Compression molding of three layers of molding material with a pair of molds
A compression molding step of forming the compression molded article;
A cooling step, in which a layer having a vacuum void is formed.
Forming molded products sandwiched by layers without vacuum voids
A method for molding a resin molded product, characterized in that: 5. The method according to claim 1, wherein the vaporizing material is water.
The method for molding a resin molded article according to any one of claims 1 to 4 . 6. A molding machine comprising a molding material containing a vaporizer.
To change the speed and nozzle diameter when discharging from
It is characterized by controlling the size and amount of vacuum voids.
A method for molding a resin molded article according to any one of claims 1 to 5 . 7. Changing the cooling rate in the cooling step
The size of a vacuum void is controlled.
A method for molding a resin molded article according to any one of claims 1 to 6 . 8. The mold clamping force at the stage of performing compression molding.
Control the distribution of vacuum voids by changing
The method for molding a resin molded article according to claim 6, wherein 9. A state in which a molding material containing a vaporizing material is discharged.
Such as glass powder in or on the molding material
6. The method according to claim 1, wherein a filler is provided.
The method for molding a resin molded article according to any one of the above . 10. A high-speed discharge of a molding material containing no vaporizing material.
To form a groove-like pattern on the surface of the molded product.
The method for molding a resin molded product according to claim 2 or 4, wherein: 11. The cooling in the cooling step is performed by rapid cooling with water.
7. The method according to claim 1, further comprising:
A method for molding a resin molded product according to any one of the above. 12. A resin composition containing a foaming material in addition to a vaporizing material.
2. The method according to claim 1, wherein a shape material is used.
The method for molding a resin molded article according to claim 2 or 4 . 13. A molding machine for molding a resin molding material containing a vaporizing material.
Discharge stage of molding material discharged from cylinder and this discharge
Kneading the provided molding material and mixing the kneaded molding material
Compression molding that forms a molded product by compression molding with a pair of molds
A shaping stage, and a cooling stage for cooling the compression molded article.
Forming vacuum voids and bubbles in the molded article
A method for molding a resin molded product , characterized in that : 14. A molding machine for molding a resin molding material containing a vaporizing material.
Discharge stage of molding material discharged from cylinder and this discharge
Kneading the formed molding material and adding the kneaded molding material
One layer of molding material containing two layers of molding material without vaporizer
Compression molding that forms a molded product by compression molding with a pair of molds
Stage and cooling stage to cool the compression molded part
Layer with vacuum voids and bubbles and vacuum voids and air
A method for molding a resin molded article, comprising forming a molded article in which a layer having no foam is laminated . 15. A molding machine for molding a resin molding material containing a vaporizing material.
Discharge stage of molding material discharged from cylinder and this discharge
Kneading the discharged molding material, and
Three layers of molding material with top and bottom molding materials without vaporizer
To form a molded product by compression molding the material with a pair of molds
A compression stage and a cooling stage for cooling the compression molded part
Floor, and the layer with vacuum voids and bubbles is
This <br/> a molding method of a resin molded article, characterized in that to form the de-and moldings sandwiched by no layer bubbles. 16. A pair of dies for compression molding and a pair of dies.
Two molding machine cylinders for discharging resin molding material
Press with a tool and driving means to change the position of the mold
A control device for controlling the driving means, a resin dryer,
A moisture meter to measure the moisture content of the fat and a cooling device
An apparatus for forming a resin molded product, comprising: 17. A light source, disposed adjacent to said light source.
Lighting device made of resin material such as umbrella, decoration, glove
Wherein the resin member and the layer containing the vacuum void are
Consists of a resin molded product laminated with layers that do not include voids
A lighting device, comprising: 18. A vacuum molding method wherein a layer on the light source side of a resin molded product is a vacuum void
The lighting device according to claim 17, wherein the lighting device comprises: 19. A light source, disposed adjacent to said light source.
Lighting device made of resin material such as umbrella, decoration, glove
In the above, the resin member is used to clean a layer containing a vacuum void.
A lighting device comprising a resin molded product sandwiched between layers without voids . 20. A groove-shaped pattern on a resin surface layer of a resin molded product.
20. The method according to claim 17, wherein
The lighting device according to any one of the above. 21. A resin molded product including a vacuum void,
Includes a filler with a different flexural modulus than the resin of the resin molded product
The method according to any one of claims 17 to 20, wherein
Mounting lighting device. 22. The size of the vacuum void is 0.5 to 0.5 in diameter.
18. The size of 2.0 mm.
The lighting device according to any one of claims 21 to 21 . 23. After cutting the flash of the molded article,
It is characterized by using the melted material as a resin member
The lighting device according to any one of claims 17 to 22 .