JP2931513B2 - Molded product packaging structure 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 molded product packaging structure and a method of manufacturing the same. For example, in the rubber industry and the plastics industry, a liquid reactant may be injected into a molding frame and cured to obtain a molded product, or various powders may be mixed with a binder and molded. In the cement industry, reaction hardening materials such as cement and mortar are often molded. Furthermore, in the food industry, food materials such as gelatin and ice confectionery are often molded. The present invention can be applied to packaging such various molded articles.

[0002]

2. Description of the Related Art Conventionally, there are several methods for molding various substances. In the rubber industry and the plastics industry, generally, a rubber composition and a plastic composition are filled in a mold, and cured by heating and pressing to obtain a molded product.
The molded product was removed from the mold, the "burrs" or small projections on the surface of the molded product were removed, and then the molded product was packaged.

[0003] However, when packaging molded products used for various parts, it is necessary to remove a large amount of molded products, package them while confirming their quantity, and pack them. Therefore, counting errors are likely to occur. Further, since many steps such as demolding, removal of burrs, quantity confirmation, packaging, and packing are required, the number of steps is large, the work is complicated, and labor costs are high.
In addition, there are many cases where it is not necessary to remove "burrs" from the viewpoint of the performance as a part. Many. However, in order to package and pack the molded product, it is necessary to remove the "burrs" from the molded product in view of the product, considering that the molded product is taken out of the package and viewed by customers.

In the case of manufacturing a molded product by solidifying a liquid material with the passage of time, the liquid material is poured into a mold, and the mold is left in a predetermined storage place. The product needs to be removed. However, the molding die is occupied until the liquid material is completely solidified, that is, during the cycle of injection, molding, and demolding of the liquid material. In order to speed up the rotation of the mold, it is necessary to finish the solidification step early. For this reason, solidification of the liquid material has been speeded up by adding an originally unnecessary catalyst to the liquid material or heating the liquid material. However, these catalysts and heating are essentially unnecessary, and measures have been desired.

[0005] When the molded product has adhesiveness,
Since stains easily adhere to the molded product, it is necessary to maintain the state of the packaging form until immediately before use. A release paper is attached to a molded product having adhesiveness and packaged. However, since it is not completely covered with the release paper, dirt may adhere to the molded product during storage or transportation, and the commercial value may be reduced. Further, a molded product made of a material having a high plasticity or viscosity tends to be deformed during transportation or storage, which may cause a complaint.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve various problems caused by packaging and packing molded articles, such as demolding, removal of burrs, quantity confirmation, packaging, and packing. To reduce productivity, prevent productivity from dropping due to occupation of molding dies, prevent dirt from adhering to molded products during storage, transportation, etc., and mold from materials with high plasticity and viscosity. The purpose is to prevent product deformation.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a molded article filled in a molding space formed by an upper mold, a lower mold, and the upper mold and the lower mold. And the upper mold and the lower mold are integrated, and the molded article is molded in close contact with the upper mold and the lower mold, whereby the molded article is The present invention relates to a molded product packaging structure packaged in a molding space.

[0008] Further, the present invention provides a molding mold having an upper mold and a lower mold, and the molding space of the molding mold includes:
A raw material to be molded in a state in which it is in close contact with the shape of the molding space is filled, and the raw material is molded to obtain a molded product in close contact with the upper mold and the lower mold. The present invention relates to a method for manufacturing a molded product packaging structure.

[0009]

According to the present invention, the molding space of the molding frame is filled with the material to be molded in a state of being in close contact with the shape of the molding space, the upper mold and the lower mold are integrated, and the raw material is molded. Thus, a molded product closely contacting the upper mold and the lower mold is obtained, and the molded product is packed in the molding space. That is, using the molding form as a packaging material, without removing the molded product from the molding form,
They could be packed, stored and transported as they were.

This eliminates the need for steps such as removal of the mold, confirmation of the quantity, packaging and packing. Further, since the molded product is packaged in the molding form, it is not necessary to remove burrs of the molded product. When a liquid product is solidified over time to produce a molded product, the liquid material is injected into a molding frame, then the liquid material is solidified, and stored and transported in this state. Therefore, there is no problem that the molding die is occupied until the liquid is completely solidified.

Further, when the molded product has adhesiveness,
Since the molded product is packaged as it is in the molding frame, there is no opportunity to expose the molded product. Therefore, no stain adheres to the molded product. In addition, molded products made of materials with high plasticity and viscosity are also held in a state molded under pressure in the molding mold, so even if pressure is applied to the molding mold during transportation and storage in stock. , Molded products are not easily deformed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a molding form having an upper mold and a lower mold is prepared. One of the upper mold and the lower mold may be a flat plate or a film. The upper mold and the lower mold may be separated from each other, or may be integrated in advance.

The material of the molding frame includes thermoplastic resin, thermosetting resin (polyethylene, polypropylene, styrene, polyester, nylon, urethane, epoxy, phenol, etc.), metal foil (iron, aluminum, etc. foil), Paper-like materials can be used alone,
These composites can be used. Further, a vapor deposition layer of aluminum is provided on the surface of each of these materials, light can be shielded by this vapor deposition layer, and a release layer made of silicon or the like can be formed.

The molding space of the molding frame is filled with a raw material to be molded in close contact with the shape of the molding space, and the raw material is molded to obtain a molded product in close contact with the upper mold and the lower mold. At this time, if the upper mold and the lower mold are separated, the upper mold and the lower mold are integrated. At this time, the upper mold and the lower mold may be joined by an adhesive, or may be integrated by fitting a concave portion and a convex portion. The periphery of the molding space can be sealed with an adhesive tape, an adhesive, a hot melt, or the like.

A plurality of molding spaces can be formed in the molding frame. In this case, an opening can be provided in the upper mold of each molding space. In particular, when a liquid material is injected into the molding space, this opening serves as an inlet for the liquid material and also serves as a vent for air. Further, each molding space can be made continuous by a gas passage. The gas passage may be formed by an upper or lower groove, or may be formed by a pipe.

When the raw material has plasticity and / or tackiness, the raw material is put into an upper mold and / or a lower mold, and then the upper mold and the lower mold are integrated, and a molding frame is placed in a mold. The raw material in the molding space can be compressed and molded in a mold or wooden mold. Alternatively, a molding space is formed by combining the upper mold and the lower mold in advance, and the raw material can be put into the molding space.

When the raw material is a powder, the powder can be put into an upper mold and / or a lower mold, and then the upper mold and the lower mold are integrated to mold the powder in the molding space. Alternatively, the upper mold and the lower mold may be combined in advance to form a molding space, and powder may be put into the molding space to mold the powder.

The raw material having plasticity and / or tackiness includes clay, putty-like material, unvulcanized rubber, elastomer and the like. In particular, it is preferable to apply some pressure during molding. Examples of powder raw materials include rubber and plastic powders and particles, and powders and particles such as fillers. Rubber and plastic powders and particles may or may not be foamed.

The raw material composed of a liquid material includes a liquid material that reacts and solidifies at room temperature, a liquid material that reacts at room temperature, foams and solidifies, a liquid material that reacts and solidifies by low-temperature heating, and a liquid material that reacts and solidifies by heating at low temperature. Liquid, a liquid that solidifies by oil absorption, and a liquid that contains a hydraulic substance such as cement gypsum. The raw material having plasticity and / or tackiness, the raw material composed of the above-mentioned powder, and the raw material composed of the above-mentioned liquid material are usually molded alone, but may be molded by mixing.

Next, a preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1A is a partial cross-sectional view showing a state where an upper mold 1 and a lower mold 2 are separated, and FIG.
FIG. 2 is a partial cross-sectional view showing a state where a molded article 10 is packaged. FIG. 2 is a plan view showing the planar shapes of the upper mold 1 and the lower mold 2.

The upper mold 1 has a flat portion 1a and a molded portion 1b. A substantially hemispherical space 3 is formed inside the molded part 1b. The lower mold 2 has a flat portion 2a and a molded portion 2b. A substantially hemispherical space 4 is formed inside the molded part 2b. An adhesive layer 5 is provided on the flat portion 2a of the lower mold 2.
Is provided.

The spaces 3 and 4 are arranged as shown in FIG. 2, and the spaces 3 and 4 are provided so as to be aligned with each other. A predetermined amount of raw material is accommodated in these spaces 3 and 4,
The upper mold 1 and the lower mold 2 are integrated. At this time, as shown in FIG. 1B, the upper mold 1 and the lower mold 2 are joined by the adhesive layer 5. As a result, a molding space 6 is formed in the molding form. The molding frame thus obtained is placed in a mold, a wooden mold, or the like, and a predetermined pressure is applied to mold the raw material. As a result, a molded product 10 is generated in the molding space 6. Molded product 10 is upper mold 1
And the lower mold 2.

In this state, each molded product 10 is packaged in a molding space of a molding frame. This molding form is stored in a warehouse and then transported. Of course, there is no need to remove the molded product 10 from the molding form.

FIG. 3A is a partial sectional view showing a state where the upper mold 11 and the lower mold 12 are separated, and FIG. 3B is a partial sectional view showing a state where the molded article 10 is packaged. is there. The upper die 11 includes a flat portion 11a and a molded portion 11b.
A substantially hemispherical space 3 is formed inside the molded part 11b. The lower mold 12 includes a flat portion 12a and a molded portion 12b. A substantially hemispherical space 4 is formed inside the molded part 12b. Each space 3, 4 is arranged as shown in FIG.

In the flat portion 11a of the upper mold 1, a convex portion 7 is formed around the space 3. Flat portion 12a of lower mold 12
Has an opening 8 and a recess 9 around the space 4. A predetermined amount of raw material is accommodated in the spaces 3 and 4, and the upper mold 11
And the lower mold 12 are integrated. At this time, as shown in FIG. 3B, the convex portion 7 is fitted into the opening 8 and the concave portion 9. As a result, a molding space 6 is formed in the molding form.

The thus obtained mold is placed in a mold, a wooden mold or the like, and a predetermined pressure is applied to mold the raw material. As a result, a molded product 10 is generated in the molding space 6. Molded product 10
It is in close contact with the upper mold 1 and the lower mold 2 and is packaged by a mold.

FIG. 4 is a partial cross-sectional view showing a molding die according to still another embodiment, and FIG. 5 is a plan view showing a planar shape of the upper die 21. The upper mold 21 includes a flat portion 21a and a molded portion 21b.
An opening 21c is provided in the vicinity of the center. Molding part 2
A substantially hemispherical space 3 is formed inside 1b.
The lower mold 22 includes a flat portion 22a and a molded portion 22b. A substantially hemispherical space 4 is formed inside the molded portion 22b. The space 3 is arranged as shown in FIG. The space 4 is arranged as shown in FIG.

In this embodiment, further, in the upper mold 21,
Adjacent molding spaces 3 are connected by elongated grooves 13. That is, even after the upper mold 21 and the lower mold 22 are integrated, the portion of the groove 13 becomes a gas passage.

In the molding frame of this embodiment, a raw material composed of a liquid having a particularly high fluidity can be injected from the opening 21c as shown by the arrow A. Moreover, since the adjacent molding spaces 6 are continuous by the groove 13, the gas and the surplus liquid material move through the groove 13. Therefore, when the liquid material is injected into the molding space 6, the injection can be performed smoothly, and since the injection amount of the liquid material does not vary in each molding space 6, the liquid material is almost completely injected into each molding space 6. Can be filled.

FIG. 6 is a partial sectional view showing a molding form according to another embodiment. The upper mold 31 has flat portions 31a, 31
d and a molded part 31b, and an opening 31c is provided near the center of the molded part 31b. A substantially hemispherical space 3 is formed inside the molded portion 31b. Lower mold 3
2 has a flat part 32a and a molded part 32b. A substantially hemispherical space 4 is formed inside the molded portion 32b. The spaces 3 and 4 are arranged as shown in FIG.

In the state shown in FIG. 6, the upper die 31 and the lower die 32
Are integrated, and a molding space 6 is formed.
The upper die 31 and the lower die 32 are connected by a hinge part 33. On the opposite side of the hinge portion 33, a flat portion 31d
Is hooked and fixed to a fastener 32c at the end of the lower mold 32.

A raw material made of a liquid material is injected through the opening 31c. Then, the liquid is solidified to obtain a molded product 30 shown in FIG. In this state, the molded product 30 is packaged in a molding form. The molded product 30 thus packaged is stored and transported. When using the molded product 30, as shown in FIG.
Remove d, rotate upper mold 31 around hinge 33,
The molded product 30 is exposed.

Hereinafter, more specific experimental results will be described. Production Examples of Raw Materials First, each raw material was produced as follows.

[0034]

Table 1 Regenerated butyl rubber of the adhesive composition of Formulation Example 1 (100 parts by weight of Hayakawa Rubber Co., Ltd.) 100 parts by weight of polybutene 30 parts by weight Adhesive resin (terpene resin "Px @ 800" manufactured by Yashara Chemical Co., Ltd.) 50 parts by weight Talc 50 Parts by weight Calcium carbonate 100 parts by weight Total 330 parts by weight

[0035]

TABLE 2 Composition of Formulation Example 2 Ordinary Portland cement 100 parts by weight Slaked lime 5 parts by weight Silica sand 8 100 parts by weight Acrylic emulsion 20 parts by weight 100 parts by weight of rubber powder (16 to 24 mesh) 20 parts by weight of water

[0036]

[Table 3] 100 parts by weight of liquid polybutadiene rubber of Formulation Example 3 ("R # 45T" manufactured by Idemitsu Petrochemical Co., Ltd., 100 parts by weight, straight asphalt 100 parts by weight) Process oil ("Diana Process Oil AH # 16" manufactured by Idemitsu Kosan) Part Water 3 parts by weight Triethylenediamine 33% glycol solution 0.1 part by weight Dibutyltin dilaurate 0.1 part by weight Silicon (“Toshiba Silicon TSA─750” manufactured by Toshiba Silicon Corporation) 0.5 part by weight Total of the main agent 303.7 Parts by weight Curing agent (Sumitomo Bayer Urethane Co., Ltd. "Sumidur 44V @ 20") 60 parts by weight Total 363.7 parts by weight

Example 1 A mold for molding shown in FIGS. 1 and 2 was manufactured. A plate material was manufactured by laminating polyethylene and styrofoam, and the plate material was vacuum molded to manufacture an upper mold 1 and a lower mold 2. The adhesive composition of Formulation Example 1 was mixed with the upper mold 1
And the space 4 of the lower mold 2 were respectively filled. The upper mold 1 and the lower mold 2 were housed in a wooden mold and lightly pressed from above and below to mold an adhesive composition to obtain a packaged product as shown in FIG. 1 (b).

Example 2 A mold for molding shown in FIGS. 3 and 2 was prepared. The upper mold 11 and the lower mold 12 were manufactured by injection molding of urethane. The space 3 of the upper mold 11 and the space 4 of the lower mold 12 were slightly overfilled with the composition containing the cement and the rubber powder of Formulation Example 2, respectively. This upper mold 11
The lower mold 12 was housed in a wooden mold and pressed lighter than the upper and lower sides to mold the composition to obtain a packaged product as shown in FIG.

Example 3 A molding form shown in FIGS. 4 and 5 was prepared. An upper mold 21 and a lower mold 22 were manufactured by vacuum molding a 100 μm-thick polyester film. The liquid composition of Formulation Example 3 was injected into the lower mold 22 through the opening 21c. The liquid material of Formulation Example 3 foams to four times the original volume after the curing reaction.

Comparative Example 1 The adhesive composition of Formulation Example 1 was
Molded by extruder, width 40mm, thickness 5mm,
A molded product having a length of 200 mm was manufactured. Release papers having a width of 50 mm and a length of 210 mm were attached to the upper and lower surfaces of the molded product, respectively, and packaged.

The following experiments were carried out on the packaged products of the above examples. (Molding and packaging time) The time required until the step of filling the molding material into the molding mold was completed was measured. (Molding test) It was observed whether there was any inconvenience such as liquid leakage during molding.

(Effect of Preventing Deformation) For each example, one case was manufactured by stacking packaged products in 10 stages, and this case was stacked in 20 stages. Thereafter, one month later, each molded article was examined for deformation. In addition, 20 cases of the above cases were stacked on a truck, and in this state, the vehicle traveled the route of Fukuyama-Osaka-Tokyo-Nagoya-Fukuyama. After running, the deformation of the molded product was investigated.

(Test of Stain Prevention Effect)
Each packaged product was placed on a table and sprayed with calcium carbonate powder, and the degree of contamination of each molded product was observed. Next, the results of the nuclear test are shown.

(Results of Example 1) In this example, the pressure-sensitive adhesive composition of Formulation Example 1 was used to form a molding form shown in FIG. I'm using The molding and packaging time was 1 minute per piece, and it was found that a large number of sticky molded articles could be packaged very quickly. No inconvenience occurred during molding. Even after the cases were stacked in the warehouse for one month, the molded product had not been deformed at all. Also, since the molded product was protected by the molding form,
No staining of the molded product occurred.

(Results of Example 2) In this example, the composition of Formulation Example 2 was used, and the molding form shown in FIG. 3 was used. The molding and packaging time was 1 minute and 30 seconds per piece, and it was found that a large number of packaged products could be manufactured very quickly. Of course, in this state, the composition of Formulation Example 2 was cured in a molding form.

Conventionally, a composition containing such cement and rubber powder is placed in a mold, the composition is cured in the mold, cured, and the molded product after curing is removed from the mold. Then, the molded product after demolding was wrapped. In the present example, after the composition of Formulation Example 2 was filled in the mold for molding, curing of the composition proceeds therein. This curing proceeds continuously during the subsequent storage and transportation to the warehouse. Therefore, unlike the related art, a long-term curing treatment is not required.

No inconvenience occurred at the time of molding. Even after the cases were stacked in the warehouse for one month, the molded product had not been deformed at all. Also, since the molded product was protected by the molding form,
No staining of the molded product occurred.

(Results of Example 3) In this example, the liquid material of Formulation Example 3 was used, and the molding form shown in FIG. 4 was used. The molding and packaging time was 1 minute per piece, and it was found that the packaged product could be manufactured very quickly. Of course,
In this state, the liquid material of Formulation Example 3 was cured in the mold.

Conventionally, such a liquid composition is
The mold was put into a mold, the liquid material was cured in the mold, the molded product after curing was released, and the molded product after packaging was packaged. In the present embodiment, after the liquid material of Formulation Example 3 is injected into the molding frame, the liquid material hardens therein. Therefore, it is no longer necessary to carry out the curing treatment in the mold for a long time as in the conventional case.

Further, no inconvenience occurred during molding. Even after the cases were stacked in the warehouse for one month, the molded product had not been deformed at all. Also, since the molded product was protected by the molding form,
No staining of the molded product occurred.

(Comparative Example 1) The time required for molding and packaging was 1 minute and 50 seconds. No inconvenience occurred during molding, but after storage in the warehouse and after transportation, the molded article was significantly deformed. In the dirt test, dirt adhered to the side surface of the molded product.

If the material of the mold is subjected to surface release treatment,
Alternatively, if the thickness of the mold is slightly increased so that the mold is not easily broken when the molded product is taken out of the package, the mold can be reused. Therefore, it is very excellent in resource saving and environmental protection.

[0053]

According to the present invention, the molding space of the molding mold is filled with the raw material to be molded in a state in which it is in close contact with the shape of the molding space, and the upper and lower dies are integrated to form a raw material. Molding is performed to obtain a molded product in close contact with the upper and lower dies, and the molded product is wrapped in a molding space. That is, the molding form was used as a wrapping material, and the molded product could be directly packed, stored, and transported without being removed from the molding form.

This eliminates the need for steps such as removal of the mold, confirmation of the quantity, packaging, and packing. Further, it is not necessary to remove burrs of the molded product. Further, when a liquid product is solidified over time to produce a molded product, there is no problem that the molding die is occupied until the liquid material is completely solidified.

When the molded product has adhesiveness,
Since the molded product is packaged as it is in the molding frame, dirt does not adhere to the molded product. In addition, molded products made of materials with high plasticity and viscosity are also held in a state molded under pressure in the molding mold, so even if pressure is applied to the molding mold during transportation and storage in stock. , Molded products are not easily deformed.

[Brief description of the drawings]

FIG. 1A is a partial cross-sectional view showing a state in which an upper mold 1 and a lower mold 2 are separated, and FIG. 1B is a partial cross-sectional view showing a state in which a molded product 10 is packaged.

FIG. 2 is a plan view showing a planar shape of an upper mold 1 and a lower mold 2;

FIG. 3A is a partial cross-sectional view showing a state in which an upper mold 11 and a lower mold 12 are separated, and FIG. 3B is a partial cross-sectional view showing a state in which the molded article 10 is packaged.

FIG. 4 is a partial sectional view showing a molding form according to another embodiment.

FIG. 5 is a plan view showing the planar shape of the upper mold 21.

FIG. 6 is a partial sectional view showing a molding form according to another embodiment.

FIG. 7 is a cross-sectional view showing a state where the upper mold 31 and the lower mold 32 are opened and the molded product 30 is taken out.

[Explanation of symbols]

 1, 11, 21, 31 Upper mold 2, 12, 22, 32 Lower mold 3, 4, Space 5 Adhesive layer 6 Molding space 7 Convex part 8 Opening 9 Concave part 10, 30 Molded article 13 Groove (gas passage) 21c, 31c Opening A Direction of injection B Direction of flow of gas and liquid

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B65B 25/00-25/24 B65D 75/32

Claims (7)

(57) [Claims] 1. A mold having an upper mold, a lower mold of a molding mold, and a molded product filled in a molding space formed by the upper mold and the lower mold. The upper mold and the lower mold are integrated, and the molded article is molded in close contact with the upper mold and the lower mold, whereby the molded article is packaged in the molding space. , Molded product packaging structure. 2. The molded article packaging structure according to claim 1, wherein the upper mold and the lower mold are integrated by mechanical coupling of a concave portion or an opening and a convex portion, or by bonding with an adhesive. . 3. The molding frame, wherein a plurality of the molding spaces are formed, an opening is provided in the upper mold of each molding space, and each molding space is continuous by a gas passage. Item 3. The molded product packaging structure according to Item 1 or 2. 4. A molding mold having an upper mold and a lower mold is prepared, and a molding space of the molding mold is filled with a raw material to be molded in a state of being in close contact with the shape of the molding space. A method of manufacturing a molded product packaging structure, wherein the raw material is molded to obtain a molded product in close contact with the upper mold and the lower mold, and the molded product is packed in the molding space. 5. The raw material has plasticity and / or tackiness, and the raw material is filled into the molding space, and then the raw material is molded by applying pressure to the molding form. 5. The method for producing a molded product packaging structure according to 4. 6. The molded product packaging structure according to claim 4, wherein said raw material is a powder, said powder is filled into said molding space, and said powder is molded by applying pressure to said molding form. Production method. 7. The molded product is obtained by filling the molding space with the liquid material, and then solidifying or foaming the liquid material, wherein the raw material is a liquid material that solidifies after a lapse of time. A method for producing the molded product packaging structure according to the above.