TW201840395A - Manufacturing method of molded article using change type mold - Google Patents

Abstract

A manufacturing method of molded article using change type mold comprising: a printing plate preparation step of supplying ink to a designated pattern, a coloring step of dipping the ink to be prepared on the printing plate in an elastic pad, a moving step of disposing the elastic spacer between two parts of the change type mold, a transfer step of printing a predetermined pattern of ink by bringing the elastic pad into contact with the inner side surface of the two-part mold, a return step of returning the elastic pad to the original position, a preform disposing step for manufactured the molding material to the molding space of the combined mold, an expansion step of forming a molded article having a predetermined pattern on the outer side by injecting air into the inside of the preform, and a separating step of separating the molded article against the inner side surface of the mold. Furthermore, the manufacturing method of molded article using change type mold comprising: a drawing step of taking out a paper having a predetermined pattern printed on a supply box by using a transfer device, a moving step of disposing the drawn paper between two parts of the change type mold, an installation step of attaching the paper to the inner side of the mold divided into two parts, a return step of returning the elastic pad to the original position, a preform disposing step for manufactured the molding material to the molding space of the combined mold, an expansion step of forming a molded article having a predetermined pattern on the outer side by injecting air into the inside of the preform, and a separating step of separating the molded article against the inner side surface of the mold.

Description

Molded product manufacturing method using a replacement mold

The disclosed content relates to a blow molding method of manufacturing a molded article of a container or the like using a replacement mold which can form a desired pattern as required, and in the molding process, printing on a surface of a molded article or label attachment can be simultaneously performed. .

Blow molding is a method of manufacturing a hollow plastic molded article such as a bottle. The thermoplastic resin heated and melted by the extrusion molding machine is advanced toward a central portion into which the image is divided into two parts, the mold is closed, compressed air is pushed into the tube of the molten resin, expanded, and extruded to the surface of the cold mold. Curing and pulling out. In this way, a reagent bottle, a bucket, or the like of polyethylene is produced.

Usually, a label is attached to the surface of a molded article produced by blow molding. A label is manufactured for the purpose of adhering to a product container or a package. The center of gravity of the label mark is the product name and trademark, and the content, quality, ingredients, raw materials, specifications, capacity, date of manufacture, manufacturing and salesperson, and method of use are described in accordance with the requirements of the consumer who claims the correct right to know the product.

The label can use paper, but the surface of the container that is frozen or refrigerated is mainly made of synthetic paper. The synthetic paper is a synthetic polymer as a main material, and is processed in a paper form while exhibiting its characteristics, so that it has paper appearance and processing suitability. As a raw material "resin" of synthetic paper, inexpensive resins such as polyethylene, polypropylene, polystyrene, and polyvinyl chloride are widely used, and calcium carbonate, titanium oxide, or the like is added thereto. Additives to impart bending and printability to the paper.

In the technique of attaching a label to a blow molded molded article, there is a method of manufacturing a pressure vessel having an in-mold label and a three-dimensional shape, as disclosed in Korean Patent No. 10-1716092, but the mold cannot be replaced, and therefore, only one kind can be produced. Product problems.

The object of the disclosure of the present invention is to simultaneously print a trademark or other information on the surface of a molded article or attach a label exhibiting its contents in a process of producing a molded article by changing a mold of a desired pattern as needed. Process.

The invention adopts an improved molding product manufacturing method comprising: a printing plate preparing step of supplying ink in a specified pattern; a coloring step of squeezing the ink prepared to the printing plate to the elastic pad; and a moving step of arranging the elastic pad into two Part of the replacement mold; the transfer step, printing the specified pattern of ink by contacting the elastic liner with the inner side of the mold divided into two parts; returning to recover the elastic liner to the original position; preform configuration step And a molding step for supplying a molding material to a molding space of the combined mold; an expansion step of forming a molded article printed with a specified pattern on the outer side surface by injecting air into the inner portion of the preform; and a separating step for molding the inner side of the mold Separated by products.

The improved molded article manufacturing method may include: a drawing step of taking out a paper printed with a specified pattern stacked on the supply cassette by using a transfer device; and moving the step to arrange the drawn paper between the two-part replacement molds a mounting step of attaching paper to the inside of the mold divided into two parts; a returning step of recovering the transfer device to the original position; a preforming step for supplying the molding material to the molding space of the combined mold; and an expansion step The interior of the preform is filled with air to form a molded article having a specified pattern on the outer side surface; and a separating step is provided to separate the molded articles that are in close contact with the inner side surface of the mold.

The improved molded article manufacturing method can replace a part of the mold, and therefore, various types of molded articles can be produced, and the label can be printed or attached on the surface of the molded article simultaneously in the blow molding process.

Therefore, quality and productivity can be improved by shortening the manufacturing process of the molded article, and production time and production cost can be saved, and the time and cost required for maintenance of the production equipment can be saved.

Hereinafter, an improved method of manufacturing a molded article using a replacement mold will be described with reference to the drawings.

First embodiment

The improved molded article manufacturing method using the replacement mold (300) may include: a printing plate (100) preparing step of supplying the ink in a prescribed pattern; and a coloring step of squeezing the ink prepared to the printing plate (100) to the elastic pad (200); moving step, arranging the elastic pad (200) between the two-part replacement molds (300); the transfer step by passing the elastic pad (200) and the two-part mold (300) The inner side is in contact with the printing of the specified pattern ink; the returning step is to recover the elastic pad (200) to the original position; the preforming step is for supplying the molding material to the inner space of the combined mold (300); Air is injected into the interior of the preform to form a molded article (20) having a specified pattern on the outer side surface; and a separating step for separating the molded article (20) that is in close contact with the inner side surface of the mold (300).

The printing plate (100), the elastic pad (200), and the mold (300) are disposed on the basis of a printing plate (100) placed in parallel with the bottom surface, and are provided with an elastic pad (20) and a mold (300) disposed beside ).

The elastic pad (200) is coupled to one side of the transfer device (10) coupled to the main unit, and the transfer device (10) is movable and rotatable in the front-rear or left-right direction with reference to the main unit.

The elastic pad (200) is preferably a crepe pad.

The transfer device (10) is operated by a hydraulic or pneumatic cylinder provided in the main body, and can be operated by a gear or a link driven by a motor as needed.

Referring to FIGS. 1 to 2, the above-described replacement mold (300) may include: a base mold (320) in which a mounting portion is formed on an inner side surface divided into two parts; a core mold (340) ), respectively, combined with the mounting portion of the base mold (320); and a fixing portion (360), a fixed base mold (320) and a core mold (340).

If the base mold (320) or the core mold (340) is replaced, the shape of the molding space (380) formed by the base mold (320) and the core mold (340) is changed.

The sides of the mold (300) divided into two parts are originally formed as one body, but the desired parts can be separated and replaced as needed.

That is, if the portion to be replaced is the base mold (320), it can be replaced, and if the portion to be replaced is the core mold (340), it can be replaced.

The molding space (380) of the base mold (320) or the core mold (340) can form a designated pattern in an intaglio or a positive engraving, thereby prominently displaying a trademark or a specific pattern or the like.

The fixing portion (360) includes a bolt that is threadedly coupled to the first coupling hole (322) formed in the base mold (320) via a second connection hole (342) formed through the core mold (340).

As shown in part (b) of Fig. 2, the bolt head combined with one of the core molds (340) divided into two parts protrudes toward the outside of the core mold (340), and the remaining one core mold ( 340) The combined bolt head enters toward the inside of the core mold (340), and the protruding bolt head is inserted into the second connecting hole (342) formed in the remaining one core mold (340), thereby preventing the mold (300) from generating a gap. .

Specifically, the description will be made in accordance with each step.

Referring to Fig. 3, the above-described printing plate (100) preparation step is a preparation process for pad printing.

The pad printing is a product having a curved (round product) or a height difference, etc., which is difficult to perform screen printing, and an elastic pad (200) such as ruthenium or rubber is used to slap the printed plate (100) intaglio (120). The way of the ink is printed on the product; not only in a small area, but also on irregular curved surfaces, and the printing quality is excellent. The printing plate (100) preparation step, that is, for the above-mentioned pad printing, a process of adding ink to the printing plate (100) with a specified pattern of the engraved portion (120); the method of adding the ink to the engraved portion (120) can take a general spoon The way to use this is pad printing.

Referring to Fig. 4, the above coloring step is a process of squeezing the ink prepared to the printing plate (100) toward the elastic spacer (200).

The printing plate (100) is positioned below the elastic pad (200), and the elastic pad (200) is moved downward to bring it into contact with the printing plate (100) for the coloring step.

When the elastic pad (200) contacts the printing plate (100), the elastic pad (200) will lick the ink that is added to the indented portion (120) on the printing plate (100).

Since the ink reacts optically due to the energy of ultraviolet rays, it is also possible to use an ultraviolet (UV) resin ink which is solidified from a liquid state to a solid state.

In the case of using an ultraviolet resin ink, the ultraviolet resin ink can be cured as needed by providing an ultraviolet lamp dryer, thereby saving time for the ultraviolet resin ink to be cured.

Referring to Fig. 5, the moving step is a step of disposing the elastic spacer (200) of the ink of the specified engraved pattern on the printed board (100) on the position of the mold (300) for manufacturing the molded article (20). process.

That is, the colored elastic spacer (200) is disposed between the two-part molds (300).

For this reason, the elastic pad (200) that is in contact with the printing plate (100) is moved upward, then proceeds in the direction of the mold (300), stops at the position for specifying printing, and is printed on the inner side of the mold (300). The part is rotated.

Referring to Fig. 6, the above-described transfer step is a process of moving the elastic spacer (200) to a portion to be printed on the inner side surface of the mold (300) to bring the elastic spacer (200) into contact with the mold (300).

When the elastic pad (200) is in contact with the inner side of the mold (300), the ink that is applied to the elastic pad (200) is transferred onto the mold (300).

The elastic pad (200) can be used to print the ink on one side or both sides of the mold (300) divided into two parts, and in the case of printing on both sides, the inscribed portion (120) can be printed on the printing plate (100). The patterns in which the intaglios are different from each other make the patterns printed on the inside of the mold (300) different from each other.

One or two of the elastic pads (200) may be provided, and in the case of two, only one or two may be used as needed.

Referring to Figure 7, the above returning step is a process of recycling the elastic pad (200) to the home position.

To produce the molded article (20) in combination with the mold (300), the elastic liner needs to be moved (200) toward the outside of the mold (300), at which time the elastic liner (200) is moved over the printing plate (100), that is, Moving toward the initial position, the elastic pad (200) stands by for the next step of preparing the printing plate (100).

Referring to Fig. 15, the preform arrangement step is a process of arranging preforms in a molding space (380) formed by a space of a mold (300) divided into two parts.

The preform corresponds to a molding material before air is injected in the blow molding process, and the preform placed at the end of the injection tube (400) for injecting air is disposed in a molding space (380) of the mold (300) divided into two parts. ).

At this time, the injection pipe (400) proceeds to the injection port (310) formed on the upper side of the mold (300).

The above expansion step is a process of injecting air into the interior of the preform to expand it so that the preform is inflated against the molding space (380) inside the mold (300).

To this end, the two-part mold (300) is integrated, and the injection plate to which the injection pipe (400) is attached blocks the injection port (310) formed on the upper side of the mold (300).

When the preform is adhered to the molding space (380) by expansion, the specified pattern printed on the inside of the mold (300) is printed on the outside of the molded article (20) in the same pattern.

The above separation step is a process in which the molded article (20) is separated from the mold (300) after the designated pattern is printed on the outside of the molded article (20).

The integrated mold (300) is further divided into two parts, at which time the exposed molded article (20) is taken out toward the outside of the mold (300).

The process of integrating the molds (300) and separating them can be operated by an additional driving device, and the process of separating the molded articles (20) can also be operated by an additional collecting device.

The above-mentioned driving device and recovery device are activated via a hydraulic or pneumatic cylinder provided in the main body, and can be operated by a motor-driven gear or link as needed.

Second embodiment

Referring to Fig. 9, an improved method of manufacturing a molded article using a replacement mold (300) may include: a take-out step of taking out a specified pattern paper (800) stacked in a supply cassette (700) by a transfer device (10); Step, the drawn paper (800) is disposed between the two-part replacement molds (300); the installation step, the paper (800) is attached to the inner side of the mold (300) divided into two parts; The device (10) is recovered from the original position; the preform arrangement step is to supply the molding material to the internal space of the combined mold (300); and the expansion step is to inject air into the interior of the preform to form a molded article having a specified pattern on the outer side ( 20); and a separation step of separating the molded articles (20) that are in close contact with the inside of the mold (300).

Since the portion common to the first embodiment is identical to the above description, a portion different from the first embodiment is taken as the center of gravity of the description.

Referring to Fig. 10, the above-described extraction step is a process of taking out paper (800) printed with a predetermined shape from the loaded supply cassette (700) to the outside.

In order to take out the paper (800), one side of the transfer device (10) is combined with the adsorption machine (900), and the paper (800) is taken out from the supply cassette (700) to the outside of the supply container (700). .

The paper (800) can use paper or synthetic paper, and synthetic paper can prevent the paper (800) from being damaged by water droplets generated on the surface of the container which is frozen or refrigerated, and can also withstand various kinds of pollution or corrosion.

Further, each type of paper (800) can be loaded by providing a plurality of supply boxes (700), and paper (800) printed with various patterns can be loaded, and the paper (800) can be selectively taken out as needed.

In addition, in order to make people ingest foods such as foods or beverages in the container harmless to the human body, paper is recommended to use synthetic paper made from materials approved by the US Food and Drug Administration (FDA).

Referring to Fig. 11, the above-described moving step is a process of moving the paper (800) attached to the adsorption machine (900) to a mold (300) divided into two parts.

That is, the paper (800) attached to the adsorption machine (900) is disposed between the two-part molds (300).

To this end, the adsorber (900) advances in the direction of the mold (300) and stops at a designated position for attaching the paper (800).

Referring to Fig. 12, the above-described mounting step is a process of attaching paper (800) attached to the adsorption machine (900) to a predetermined position inside the mold (300).

When the adsorption machine (900) is moved toward the mold (300) and moved sideways, the paper (800) is brought into contact with the mold (300), and if the suction force of the adsorption machine (900) is released, the paper (800) remains adhered. In the state of the mold (300).

For this reason, it is possible to do some treatment such as an adhesive which can be attached to the mold (300) or the paper (800), and it is also possible to provide the mold (300) to increase the attractiveness of the paper (800), and to do additional processing as needed. The adsorption induction line is discharged.

It can also be attached to the mold (300) according to the nature of the paper (800) itself.

Depending on the requirements, the transfer device (10) can be used to attach the paper (800) on one side or both sides of the mold (300) divided into two parts, and when the two sides are attached, use different types of paper (800). The patterns printed on the paper (800) attached to the inside of the mold (300) are also different from each other.

The transfer device (10) can be set to one or two, and in the case of two settings, only one or two can be used as needed.

Referring to Fig. 13, the above returning step is a process of recovering the transfer device (10) to the original position.

To produce the molded product (20) in combination with the mold (300), the adsorption machine (900) is moved to the outside of the mold (300), at which time the adsorption machine (900) is moved to the side of the supply container (700), that is, toward The initial position is moved and the transfer device (10) stands by for the next step of taking the lead.

Referring to Fig. 8 or Fig. 14, the molded article (20) produced according to the first embodiment or the second embodiment can be confirmed.

The handle (22) can be taken by a projection (390) formed inside the mold (300).

Further, a preheating step of heating the mold (300) at a temperature of 20 to 150 ° C may be included before the above-described transfer step or mounting step.

If the mold (300) is preheated at a predetermined temperature, the printing quality of the ink can be improved, and the adhesion quality of the paper (800) can be improved.

Moreover, the mold (300) on which the ink or the attached paper is attached can be selectively heated in whole or in part, and the energy consumed by heating the mold (300) is reduced, so that the production cost of the molded article (20) can be saved.

10‧‧‧Transfer device

20‧‧‧Molded goods

22‧‧‧Hands

100‧‧‧Printing board

120‧‧‧Inscription

200‧‧‧elastic pads

300‧‧‧Mold

310‧‧‧Injection

320‧‧‧Base mold

322‧‧‧First connection hole

340‧‧‧ core mold

342‧‧‧Second connection hole

360‧‧‧Fixed Department

380‧‧‧Molding space

390‧‧‧ Highlights

400‧‧‧Injection board

500‧‧‧ preform

600‧‧‧Injection tube

700‧‧‧Supply box

800‧‧‧paper

900‧‧‧Adsorption machine

Figure 1 is a perspective view of a replacement mold of the present invention. Fig. 2 is a cross-sectional view of the replacement mold of the present invention viewed from above. Figure 3 is a schematic perspective view of a printing plate preparation step in the first embodiment of the present invention. Figure 4 is a schematic perspective view of a coloring step in the first embodiment of the present invention. Fig. 5 is a schematic perspective view showing a moving step in the first embodiment of the present invention. Figure 6 is a schematic perspective view of a transfer step in the first embodiment of the present invention. Fig. 7 is a schematic perspective view showing a returning step of the first embodiment of the present invention. Fig. 8 is a perspective view of a molded article produced in the first embodiment of the present invention. Figure 9 is a schematic perspective view of a second embodiment of the present invention. Figure 10 is a schematic perspective view of the take-out step in the second embodiment of the present invention. Figure 11 is a schematic perspective view showing a moving step in the second embodiment of the present invention. Figure 12 is a schematic perspective view showing the mounting step in the second embodiment of the present invention. Figure 13 is a schematic perspective view showing a returning step in the second embodiment of the present invention. Figure 14 is a perspective view of a molded article produced in a second embodiment of the present invention. Figure 15 is a schematic side cross-sectional view of the blow molding of the present invention.

Claims (12)

A method for manufacturing a molded article using a replacement mold, comprising: a printing plate preparing step of supplying ink in a prescribed shape; a coloring step of kneading ink prepared to the printing plate on an elastic pad; and a moving step of the elastic lining The pad is disposed between the two-part replacement molds; the transfer step is formed by contacting the elastic pad with the inner side of the two-part replacement mold to form the printing ink of the predetermined shape; The elastic pad is recovered from the original position; the preform arrangement step is for supplying the molding material to the molding space of the combined replacement mold; and the expanding step is performed by injecting air into the interior of the preform to form the outer side surface with the prescribed shape a molded article; and a separating step of separating the molded article that is in close contact with the inner side surface of the replacement mold. The method of claim 1, wherein the elastic pad is a crepe pad, and in the transferring step, the elastic pad is printed on one side or both sides of the replacement mold divided into two parts. Ink. The method of claim 1, wherein the ink is an ultraviolet resin ink. A method for producing a molded article using a replacement mold, comprising: a drawing step of taking out a sheet of paper having a predetermined shape printed on a supply cassette by a transfer device; and moving the step of arranging the ejected paper in a two-part replacement Between the molds; an installation step of attaching the paper to the inner side of the replacement mold divided into two parts; a returning step of recovering the transfer device to the original position; and a preform arrangement step for combining the replacement The molding die is supplied with a molding material in a molding space; the expansion step is performed by injecting air into the interior of the preform to form a molded article having the predetermined shape printed on the outer side surface; and a separating step of adhering the molded article to the inner side surface of the replacement molding die Separated. The method of claim 4, wherein the mounting step attaches the paper to one side or both sides of the one of the replacement molds divided into two parts. The method of claim 4, wherein the paper is a synthetic paper. The method of claim 4, wherein the step of extracting is to cause the transfer device to selectively extract a plurality of sheets of paper stacked on the plurality of supply cassettes. The method of manufacturing a molded article using a replacement mold according to any one of claims 1 to 8, wherein the replacement mold comprises: a base mold having a mounting portion formed on an inner side surface divided into two parts; a core mold respectively coupled to the mounting portion of the base mold; and a fixing portion for fixing the base mold and the core mold; and if the base mold or the core mold is replaced, the base mold and the core mold are formed The shape of the molding space changes. The method of claim 8, wherein the base mold or the core mold forms the prescribed shape in the molding space by engraving or embossing. The method of claim 8, wherein the fixing portion includes a bolt that is threadedly coupled to the first connecting hole of the base mold through a second connecting hole of the core mold. The method of claim 10, further comprising a bolt head combined with one of the core molds divided into two parts protruding toward the outside of the core mold, combined with the other core mold The bolt head enters toward the inside of the core mold, and the protruding bolt head is inserted into the second connection hole formed in the remaining one core mold to prevent the mold from generating a gap. The method of claim 8, wherein the transferring step or the mounting step further comprises a preheating step of heating the replacement mold at a temperature of 20 to 150 °C.