WO2018182095A1

WO2018182095A1 - Method for manufacturing molded product by using replaceable mold

Info

Publication number: WO2018182095A1
Application number: PCT/KR2017/006763
Authority: WO
Inventors: 박창; 김은혜; 박소리; 신은총
Original assignee: 박창; 김은혜; 박소리; 신은총
Priority date: 2017-03-27
Filing date: 2017-06-27
Publication date: 2018-10-04
Also published as: KR20180109102A; TW201840395A

Abstract

A method for manufacturing a molded product by using a replaceable mold according to the present invention comprises: a step of preparing a printing plate to which ink is supplied in a predetermined pattern; a coloration step of staining an elastic pad with the ink provided on the printing plate; a movement step of placing the elastic pad between replaceable mold halves; a transfer step of bring the elastic pad into contact with the inner surfaces of the mold halves to allow the ink to be printed on the inner surfaces in the predetermined pattern; a return step of returning the elastic pad to the original position thereof; a step of placing a preform for supplying a molding material to a molding space of the closed mold halves; an expansion step of blowing air into the preform to form a molded product having the predetermined pattern printed on the outer surface thereof; and a separation step of releasing the molded product coming in close contact with the inner surfaces of the mold halves.

Description

Manufacturing method of molded article using replaceable mold

The present disclosure relates to a blow molding method for manufacturing a molded article such as a container using a replaceable mold capable of forming a desired shape as needed, and at the same time, printing or labeling on the surface of the molded article can be simultaneously performed. have.

Blow molding is a method of making hollow plastic molded parts such as bottles. The heat-melted thermoplastic resin is pushed into the center divided by two by an extruder to close the mold, send compressed air into the molten resin pipe to expand, and press it on the surface of the cold mold to solidify the mold. In this way, reagent bottles, bottles, and the like are made of polyethylene.

In general, a label is attached to the surface of a molded article produced by blow molding. Labels are made for the purpose of placing labels on merchandise containers or packages. At the heart of label labels are brand names and trademarks, which describe the content, quality, ingredients, raw materials, specifications, dosage, date of manufacture, manufacture and salesperson, and method of use, depending on the consumer's request for the right to know the product correctly. .

The label may be paper, but synthetic paper is mainly used on the surface of the container which is frozen or refrigerated. Synthetic paper means that synthetic polymer is used as the main material and processed into paper shape while utilizing its characteristics to have the appearance and processability of paper. As a raw material of synthetic paper, inexpensive resins such as polyethylene, polypropylene, polystyrene, and polyvinyl chloride are widely used, and additives such as calcium carbonate or titanium oxide are added to the It gives warpage and printability.

As a technique for attaching a label to a blow molded article, there is a method of manufacturing a pressure vessel having an in-mold label and a three-dimensional shape, but Korean Patent No. 10-1716092 discloses only one product because a part of the mold cannot be replaced. There was a problem that can be produced.

Disclosed is the purpose of simultaneously performing a process of printing a label or other information on the surface of the molded article or a label indicating it in the process of producing a molded article by replacing a part of the mold to a desired shape as needed.

The improved method for producing a molded article includes a printing plate preparation step in which ink is supplied in a predetermined shape, a coloring step of burying the ink prepared on the printing plate on the elastic pad, a moving step of placing the elastic pad between the divided molds, and the elastic pad in two parts. A transfer step of printing ink in a predetermined shape by contacting the inner surface, a return step of recovering the elastic pad to its original position, a preform arrangement step of supplying molding materials to the molding space of the combined mold, and injecting air into the preform It is preferable to include an expansion step of forming a molded article printed a predetermined shape on the outer surface and a separation step of separating the molded article in close contact with the mold inner surface.

The improved method for producing a molded article includes a take-out step of taking out a sheet of paper having a predetermined shape stacked on the feeder using a transfer device, a moving step of placing the drawn paper between the divided molds, and attaching the paper to the inside of the divided mold. A mounting step, a return step of recovering the transfer device to its original position, a preform arrangement step for supplying molding materials to the molding space of the combined mold, and a molded product having a predetermined shape printed on the outer surface by injecting air into the preform. Preferably, the expansion step and the separation step of spaced apart the molded article in close contact with the mold inner surface.

Improved molded article manufacturing method can replace a part of the mold, it is possible to produce a variety of molded articles with a single mold, it is possible to simultaneously print or label on the molded surface during the blow molding process.

Therefore, by shortening the molding process, the quality and productivity can be improved, the production time and production cost can be reduced, and the time and cost required for the maintenance of the production equipment can be reduced.

1 is a perspective view showing a replaceable mold of the method for producing a molded article using the replaceable mold.

Figure 2 is a cross-sectional view of the replaceable mold of the molded article manufacturing method using a replaceable mold.

3 is a perspective view schematically showing a printing plate preparation step according to a first embodiment of a method for manufacturing a molded article using a replaceable mold.

4 is a perspective view schematically showing a coloring step according to a first embodiment of a method for manufacturing a molded article using a replaceable mold.

5 is a perspective view schematically showing a moving step according to a first embodiment of a method for manufacturing a molded article using a replaceable mold.

6 is a perspective view schematically showing a transfer step according to a first embodiment of a method for manufacturing a molded article using a replaceable mold.

7 is a perspective view schematically showing a return step according to a first embodiment of a method for manufacturing a molded article using a replaceable mold.

8 is a perspective view showing a molded article produced according to the first embodiment of the method for manufacturing a molded article using a replaceable mold.

9 is a perspective view schematically showing a second embodiment of a method for manufacturing a molded article using a replaceable mold.

10 is a perspective view schematically illustrating a withdrawal step according to a second embodiment of a method for manufacturing a molded article using a replaceable mold.

11 is a perspective view schematically showing a moving step according to a second embodiment of a method for manufacturing a molded article using a replaceable mold.

12 is a perspective view schematically showing a mounting step according to a second embodiment of a method for manufacturing a molded article using a replaceable mold.

13 is a perspective view schematically illustrating a return step according to a second embodiment of a method for manufacturing a molded product using a replaceable mold.

14 is a perspective view showing a molded article produced according to the second embodiment of the method for manufacturing a molded article using a replaceable mold.

15 is a side cross-sectional view schematically showing a blow molding of a method for manufacturing a molded article using a replaceable mold.

(Explanation of the sign)

10: feeder 20: molded product

22: handle 100: printing plate

120: engraved portion 200: elastic pad

300: mold 310: injection hole

320: base mold 322: first fastener

340: core mold 342: second fastener

360: fixture 380: molding space

390: protrusion 400: injection plate

500: preform 600: injection tube

700: feeder 800: paper

900: adsorber

Hereinafter, a method of manufacturing a molded product using the improved replaceable mold will be described with reference to the accompanying drawings.

[First Embodiment]

Molded article manufacturing method using the improved replaceable mold 300, the printing plate 100 is supplied with ink in a predetermined shape preparing step; A coloring step of embedding the ink prepared on the printing plate 100 on the elastic pad 200; Moving step of placing the elastic pad 200 between the bisected replacement mold 300; A transfer step of printing the ink in a predetermined shape by contacting the elastic pad 200 to the inner surface of the divided mold 300; A return step of recovering the elastic pad 200 to its original position; Preform arrangement step for supplying a molding material in the combined space of the mold 300; An expansion step of injecting air into the preform to form a molded article 20 having a predetermined shape printed on an outer surface thereof; And a separation step of spaced apart from the molded article 20 in close contact with the inner surface of the mold 300.

In the arrangement of the printing plate 100, the elastic pad 200, and the mold 300, the elastic pad 200 is positioned above the printing plate 100 and the mold 300 is positioned on the side of the printing plate 100. . The elastic pad 200 is coupled to one side of the transfer device 10 is coupled to the body, the transfer device 10 is capable of moving and rotating in the front and rear or left and right directions relative to the body. The elastic pad 200 is preferably a silicon pad.

The transfer device 10 is operated by a hydraulic or pneumatic cylinder installed in the main body, may be operated using a gear or a link driven by a motor, if necessary.

1 to 2,

The replaceable mold 300, the replaceable mold 300 is a base mold 320 having a mounting portion formed on the inner side of the bisected; Core molds 340 are respectively coupled to the mounting portion of the base mold 320; And a fixture 360 for fixing the base mold 320 and the core mold 340.

When 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 bisected mold 300 is originally formed on both sides, but if necessary, it is possible to separate and replace a desired part. That is, if the part to be replaced is the base mold 320, it may be replaced, if the core mold 340 is to replace it.

In the molding space 380 of the base mold 320 or the core mold 340, a predetermined shape may be formed in an intaglio or an embossment to make a trademark or a specific pattern stand out.

The fixture 360 may include a bolt that is screwed into the first fastening hole 322 formed in the base mold 320 through the second fastening hole 342 formed in the core mold 340.

As shown in (b) of FIG. 2, the head of the bolt coupled to the core mold 340 of the bisected core mold 340 protrudes to the outside of the core mold 340, and the other core mold 340. The head of the bolt coupled to the) is introduced into the inside of the core mold 340, the head of the protruding bolt is inserted into the second fastening hole 342 formed in the other core mold 340, the mold 300 It can prevent play.

Specifically, each step will be described.

Referring to FIG. 3, the preparing step of the printing plate 100 is a preparation process for pad printing.

Pad printing refers to printing ink on the intaglio portion 120 of the printing plate 100 by using elastic pads 200, such as silicone or rubber, on products that are difficult to be silk printed (circular products) or steps. As a method, it is possible to print on a small area and irregular curved surface, and the printing quality is excellent.

The printing plate 100 preparing step is a process of putting ink in the intaglio portion 120 formed in a predetermined shape on the printing plate 100 for printing the pad, and the method of putting ink in the intaglio portion 120 is usually performed using a spatula. The same thing as pad printing of is preferable.

Referring to FIG. 4, the coloring step is a process for burying the ink prepared on the printing plate 100 on the elastic pad 200.

The printing plate 100 is positioned below the elastic pad 200, and the elastic pad 200 moves downward to contact the printing plate 100 to perform a coloring step. When the elastic pad 200 comes into contact with the printing plate 100, ink contained in the intaglio portion 120 of the printing plate 100 is buried in the elastic pad 200.

The ink may use a UV resin ink that undergoes a photochemical reaction with energy of ultraviolet rays and cures from a liquid phase to a solid phase. When using a UV resin ink can be provided with a UV lamp dryer to cure the UV resin ink as needed, it is possible to control when the UV resin ink is cured.

Referring to FIG. 5, the moving step is a process of disposing an elastic pad 200 colored in a predetermined shape engraved on the printing plate 100 to a place where the mold 300 for manufacturing the molded product 20 is located.

That is, the colored elastic pads 200 are disposed between the divided molds 300. To this end, the elastic pad 200 which has been in contact with the printing plate 100 moves upward and then moves in the direction of the mold 300, and the portion to be printed on the inner surface of the mold 300 after stopping at a predetermined position for printing. Will rotate toward.

Referring to FIG. 6, the transferring step is a process of contacting the elastic pad 200 and the mold 300 by moving the elastic pad 200 toward the portion to be printed on the inner surface of the mold 300.

When the elastic pad 200 is in contact with the inner surface of the mold 300, the ink on the elastic pad 200 is printed on the mold 300. If necessary, ink may be printed on one or both sides of the divided mold 300 by using the elastic pad 200. When printing on both sides, the intaglio portion 120 of the printing plate 100 may be formed to have different shapes. It is also possible to make the shapes printed inside the 300 different.

The elastic pad 200 may be provided with one or two, and when provided with two, only one or two may be used simultaneously as necessary.

Referring to FIG. 7, the returning step is a process of recovering the elastic pad 200 to its original position.

In order to produce the molded article 20 by combining the mold 300, the elastic pad 200 needs to be moved to the outside of the mold 300. In this case, the elastic pad 200 is moved onto the printing plate 100, that is, the initial position is elastic. The pad 200 waits for the next printing plate 100 preparation step.

Referring to FIG. 15, the preform arranging step is a process of arranging the preform in the molding space 380 formed in the divided space of the mold 300.

The preform corresponds to a molding material before injecting air in the blow molding process, and the preform positioned at the end of the injection pipe 400 for blowing air is placed into the molding space 380 of the divided mold 300. . In this case, the injection pipe 400 passes through the injection hole 310 formed at one side of the mold 300.

The expansion step is a process in which the preform is inflated by blowing air into the preform and is in close contact with the molding space 380 inside the mold 300. To this end, the divided mold 300 is combined into one, and the injection plate is coupled to the injection pipe 400 passing through the injection hole 310 formed at one side of the mold 300 to block the injection hole 310. When the preform swells and adheres to the molding space 380, a predetermined shape printed on the inner surface of the mold 300 is printed in the same shape on the outside of the molded product 20.

The separating step is a process of separating the molded article 20 from the mold 300 after a predetermined shape is printed on the outside of the molded article 20.

The mold 300 coupled to one is bisected again, and the molded article 20 exposed at this time is taken out of the mold 300. The process of combining and separating the mold 300 into one may be implemented by a driving device provided separately, and the process of separating the molded product 20 may be implemented by a recovery device provided separately.

The drive device and the retrieval device are operated by a hydraulic or pneumatic cylinder installed in the main body, and may be operated using a gear or a link driven by a motor, if necessary.

Second Embodiment

Referring to FIG. 9, the molded article manufacturing method using the improved replaceable mold 300 may include: a take-out step of taking out a paper 800 printed with a predetermined shape stacked on the feed box 700 using the transfer device 10; A moving step of disposing the withdrawn paper 800 between the divided molds 300; A mounting step of attaching the paper 800 to the inner surface of the divided mold 300; A return step of recovering the transfer device 10 to its original position; Preform arrangement step for supplying a molding material in the combined space of the mold 300; An expansion step of injecting air into the preform to form a molded article 20 having a predetermined shape printed on an outer surface thereof; And a separation step of spaced apart from the molded article 20 in close contact with the inner surface of the mold 300.

Since the parts common to the first embodiment are the same as those described above, the description will be mainly focused on the parts different from the first embodiment.

Referring to FIG. 10, the withdrawal step is a process of taking out the paper 800 to the outside from the supply box 700 in which the paper 800 with a predetermined shape is printed.

Adsorber 900 is coupled to one side of the feeder 10 to take out the paper 800, by using the adsorption of the paper 800 in the feeder 700 can take out the paper 800 outside the feeder 700 have. The paper 800 may use paper or synthetic paper. When using the synthetic paper, the paper 800 may be prevented from being damaged by water droplets, etc. generated on the surface of a container that is frozen or refrigerated, and may be damaged or corroded. I can endure it.

And by providing a plurality of feed boxes 700, it is possible to load a variety of types of paper 800, and can also load a paper 800 printed in a variety of shapes, selectively withdraw the desired paper 800 as needed It is possible to do In addition, the paper is preferably made of synthetic paper made of raw materials certified by the FDA (U.S. Food and Drug Administration) so that humans can be harmless to humans when ingesting food and beverages in the container.

Referring to FIG. 11, the moving step is a process of moving and arranging the paper 800 attached to the adsorber 900 between the divided molds 300.

That is, the paper 800 attached to the adsorber 900 is disposed between the divided mold 300. To this end, the adsorber 900 is advanced toward the mold 300 and stopped at a predetermined position for attaching the paper 800.

Referring to FIG. 12, the mounting step is a process for attaching the paper 800 attached to the adsorber 900 to a predetermined position on the inner surface of the mold 300.

When the adsorber 900 is moved sideways toward the mold 300, the paper 800 is in contact with the mold 300. When the suction force of the adsorber 900 is removed, the paper 800 is attached to the mold 300. Will be maintained. To this end, a treatment such as adhesive for attachment to the mold 300 or the paper 800 may be performed, and if necessary, a separate adsorption flow path may be provided to provide the suction force for attachment of the paper 800 to the mold 300. It may be formed.

It is also possible to adhere to the mold 300 by the nature of the paper 800 itself. If necessary, the paper 800 may be attached to one or both sides of the divided mold 300 by using the transfer device 10, and when the two sides are attached to each other, a shape printed on the paper 800 may be formed differently. The printed form on the paper 800 attached inside the 300 may be different.

The transfer device 10 may be provided with one or two, and if provided with two, only one or two may be used at the same time as needed.

Referring to FIG. 13, the returning step is a process of recovering the transfer device 10 to its original position.

In order to produce the molded article 20 by combining the mold 300, the adsorber 900 needs to be moved to the outside of the mold 300. In this case, the adsorber 900 is supplied to the side of the feeder 700. 10) waits for the next withdrawal step.

8 or 14, it can be seen that the molded article 20 produced according to the first embodiment or the second embodiment.

The handle 22 can be obtained by forming the protrusion 390 in the mold 300.

In addition, before the transfer step or mounting step may further include a preheating step of heating the mold 300 to 20 ~ 150 ℃. When the mold 300 is preheated to a preset temperature, the printing quality of the ink may be improved, and the adhesion quality of the paper 800 may be improved.

In addition, it is possible to selectively heat all or a part of the mold 300 to which the ink is printed or the paper is attached, and the energy consumed to heat the mold 300 is reduced, thereby reducing the production cost of the molded product 20. .

Claims

A printing plate preparation step of supplying ink in a predetermined shape;

A coloring step of embedding the ink prepared on the printing plate on the elastic pad;

Moving the elastic pads between the divided molds;

A transfer step of printing the ink in a predetermined shape by contacting the elastic pad with the inner side of the divided mold;

Returning the elastic pad to its original position;

Preform arrangement step for supplying the molding material to the molding space of the combined mold;

An expansion step of injecting air into the preform to form a molded article having a predetermined shape printed on an outer surface thereof; And

Method for producing a molded article using a replaceable mold, characterized in that it comprises a separation step of separating the molded article in close contact with the mold inner surface.
The method of claim 1,

The elastic pad is a silicon pad,

The transfer step is a molded article manufacturing method using a replaceable mold, characterized in that for printing ink on one or both sides of the divided mold.
The method of claim 1,

The ink is a molded article manufacturing method using a replaceable mold, characterized in that using a UV resin ink.
A withdrawal step of taking out a sheet of paper having a predetermined shape stacked on the feed box using a transfer device;

A moving step of disposing the extracted paper between the divided molds;

A mounting step of attaching the paper to the inside of the divided mold;

A return step of recovering the transport device to its original position;

Preform arrangement step for supplying the molding material to the molding space of the combined mold;

An expansion step of injecting air into the preform to form a molded article having a predetermined shape printed on an outer surface thereof; And

Method for producing a molded article using a replaceable mold, characterized in that it comprises a separation step of separating the molded article in close contact with the mold inner surface.
The method of claim 4, wherein

The mounting step is a molded article manufacturing method using a replaceable mold, characterized in that the paper is attached to one or both sides of the divided mold.
The method of claim 4, wherein

The paper is a molded article manufacturing method using a replaceable mold, characterized in that using a synthetic resin.
The method of claim 4, wherein

The withdrawal step is a method for producing a molded article using a replaceable mold, characterized in that the transfer device selectively withdraws a variety of paper stacked in a plurality of feed boxes.
The method of claim 1,

The replaceable mold may include a base mold having a mounting portion formed on a bisected inner surface;

Core molds are respectively coupled to the mounting portion of the base mold; And

A fastener for fixing the base mold and the core mold,

When the base mold or the core mold is replaced, the molded article manufacturing method using the replaceable mold, characterized in that the shape of the molding space formed by the base mold and the core mold is changed.
The method of claim 8,

The base mold or the core mold is a molded article manufacturing method using a replaceable mold, characterized in that a predetermined shape is formed in an intaglio or embossed in the molding space.
The method of claim 8,

The fastener is a molded article manufacturing method using a replaceable mold, characterized in that it comprises a bolt which is screwed to the first fastening hole formed in the base mold through the second fastening hole formed in the core mold.
The method of claim 11,

The head of the bolt coupled to the core mold of the bisected core mold protrudes out of the core mold, and the head of the bolt coupled to the other core mold is drawn into the core mold and the head of the protruding bolt. Is inserted into the second fastening hole formed in the other core mold is molded article manufacturing method using a replaceable mold, characterized in that to prevent the play of the mold.
The method of claim 8,

Method for producing a molded article using a replaceable mold, characterized in that it further comprises a preheating step of heating the mold to 20 ~ 150 ℃ before the transfer step or mounting step.