KR101153172B1 - delaminated injection product and infection molding machine of delaminated injection product and manufacturing process - Google Patents

Abstract

The present invention relates to a laminated injection product, a manufacturing method of the laminated injection product, and a method for manufacturing the laminated injection product. In the laminated injection product injected into a multilayer by adding different resins, the intermediate layer and the intermediate layer are separated from the free space, A protective layer for projecting to the outside, a first aesthetic expression portion provided on the surface of the intermediate layer in a state of being separated through the protective layer, and a second aesthetic expression portion for raising aesthetics by protruding from the inner side of the protective layer; It is characterized by being done. Accordingly, by providing a means for aesthetic expression not only in the external protective layer, but also in the intermediate layer separated by the protective layer, it enhances the decorative aesthetics and provides a laminated injection product that is impossible to imitate and duplicate the product, while the laminated injection product It is possible to provide a simple device and a easy and productive method using the same.

Stacked Injection, Multi-Layered Injection, Laser Printing, Laser Transmission, Vessel, Replication

Description

Apparatus and method for manufacturing the laminated injection product and the laminated injection product {delaminated injection product and infection molding machine of delaminated injection product and manufacturing process}

The present invention relates to a laminated injection product and an apparatus for producing the laminated injection product and a method of manufacturing the same, and more particularly, to a three-dimensional article such as a container (eg, a cosmetic container), a block, or a planar article such as a card or a panel except a thin film. The present invention relates to a laminated injection product and a manufacturing method of the laminated injection product and a method of manufacturing the laminated injection product, which can be applied to all of the technical fields related to the laminated injection product manufactured by injection of a multilayer.

In general, plastic resins are polymer compounds that can be molded by applying heat and pressure, and are widely used in molding various articles due to their ease of processing and excellent productivity. Among articles using such a plastic resin, there is a container for storing a fluid content, that is, a liquid cosmetic, a beverage, a medicine, and the like.

Recently, a technique of manufacturing a multilayer container (laminated injection product) by introducing different resins into an injection molding machine instead of a single layer of a container made of the above plastic resin has been introduced. In order to manufacture a container made of a multilayer plastic resin, a blow molding method is generally used. In the blow molding, a molten resin is pre-molded in a tube form by extrusion or injection. It is a method of making a solid of a specific shape by inserting it into a mold formed to have a shape that matches the outer shape of the container, blowing air to inflate it, and solidifying it by cooling.

The above blow molding is classified into stretch blow molding, injection blow molding, and extrusion blow molding according to the state of the parison and the molding method. The parison refers to an extrudate flowing out of a die during extrusion blow molding. In some cases, it is also called a preform.

Here, three types of extrusion blow molding apparatuses are known: screw type, ram type and accumulator type. An extrusion die, commonly referred to as a crosshead die, is installed at the tip of the extruder to extrude a tubular parison, and then the inside of the parison. Air is blown into the mold.

In particular, the discharge pump is installed at the inlet of the container and there is a multi-layer laminated container made of different resins to facilitate the discharge of the contents while reducing the pressure inside the container according to the discharge of the contents, such a laminated container is the outer layer, the inner layer and between them Most of them consist of a multilayer of three or more layers including an adhesive layer.

Such a laminated injection product, such as a conventional laminated container, can display figures, characters, etc. on the outer layer portion, but it is not possible to display figures, characters, etc. on a layer separated from free space through the outer layer, and thus there is a problem in that the display constraint is restricted. have.

The present invention to solve the conventional problems as described above, by providing a means for aesthetic expression in the intermediate layer separated by the protective layer, as well as the external protective layer, thereby improving the decorative aesthetics and imitation of the product and While providing a laminated injection product that is not replicable, it aims at providing a simple apparatus and an easy and productive method using the same for producing the laminated injection product.

According to the present invention, in a multilayer injection molded with different resins and injected into a multilayer, the intermediate layer and the intermediate layer are separated from the free space, but the protective layer projects the intermediate layer to the outside, and the intermediate layer is isolated from the protective layer. And a second aesthetic expression part provided on the surface to produce aesthetics and a second aesthetic expression part to be raised from the inner side of the protective layer to produce aesthetics.

The inventors' injection molding can enhance decorative aesthetics and make imitation and reproduction of the product impossible.

In addition, the present invention, the laminated injection molding apparatus manufactures a laminated injection product quickly through simple components and structures, as well as an improved decorative aesthetics for the laminated injection product, as well as an aesthetic expression to make it impossible to copy and copy the product. It is possible to provide an apparatus for forming.

In addition, the present invention is a method of manufacturing a laminated injection molding process to produce a laminated injection easily and productively through a simple process, at the same time to improve the decorative aesthetics for the laminated injection, as well as to form an aesthetic expression to make it impossible to copy and duplicate the product. It can provide a method to make.

BRIEF DESCRIPTION OF THE DRAWINGS Prior to describing the present invention, the accompanying drawings, which are presented to help understand the technology, FIG. 1 is a block diagram schematically showing a configuration according to an embodiment of the present invention, and FIG. The circuit diagram shown in FIG.

Referring to the accompanying drawings presented as described above, the present invention, the laminated injection product 10 will be described first.

As shown in FIG. 1, the laminated injection product 10 according to the present invention includes the intermediate layer 11 and the intermediate layer 11 in a free space in the laminated injection product 10 injected with multiple resins and injected into multiple layers. And a protective layer 12 for projecting the intermediate layer 11 to the outside, and a first aesthetic expression portion provided on the surface of the intermediate layer 11 in an isolated state through the protective layer 12 to produce an aesthetic sense. 13) and a second aesthetically exposed portion 14 that extrudes from the inner side of the protective layer 12 to produce aesthetics.

Here, in the present invention, the intermediate layer 11 may be a polyester-based or polyolefine-based resin imparted with color by a master batch, or may be a polyglycolic acid-based resin. There is also.

At this time, the master batch using plastic raw materials (LDPE, EVA, PP, PET, PC, PVC, etc.) in the process of molding by extrusion or injection method, to give color or any special function to the plastic product to be made When it is added, it adds the additives with the desired function to the basic plastic raw material and processes it into plastic products with the desired color or special function. In addition, the masterbatch may be a method made by component deformation or surface change through laser irradiation.

In the present invention, the intermediate layer 11 may be a master batch resin, but may be made by discoloring the entire intermediate layer by the first aesthetic expression unit 13.

Meanwhile, in the present invention, the protective layer 12 may be a transparent or at least translucent polyester-based or polyolefine-based resin. In this case, the resin forming the protective layer 12 is preferably higher in shrinkage than the resin forming the intermediate layer 11.

In addition, the first aesthetic expression unit 13 of the present invention may be a printed layer printed on the intermediate layer 11 by focusing laser printing.

The first aesthetic expression unit 13 may be a variety of geometric representations including a beautiful pattern, or may be a combination of letters and numbers such as a label logo, a product number, and a safety mark.

In this case, the laser printing may be performed by the laser trimming apparatus or may be performed by the laser printer, and may be formed by erosion, engraving or discoloration of the surface of the intermediate layer 11 by laser exposure.

In the present invention, the second aesthetic expression unit 14 may be a printed layer printed on the protective layer 12 by focused laser printing.

The second aesthetic expression unit 14 may be various geometrical representations including beautiful patterns, such as the first aesthetic expression unit 13, and may be formed of letters and numbers such as label logos, product numbers, and safety marks. It may also be a combination.

In this case, the laser printing may be performed by a laser trimming apparatus or may be performed by a laser printer. The laser printing may be performed by exposing the inner surface of the protective layer 12 through photosensitive light. If necessary, the color may be changed.

In the present invention, the first and second aesthetic expression units 13 and 14 do not mean to express only aesthetics as the meaning of the word aesthetic expression, and include intellectual expressions to inform any contents to the outside. It is a bar.

As described above, the laminated injection product 10 of the present invention may be a three-dimensional article such as a block type having an enclosure type and other volume, such as a container, as shown in FIGS. 2 and 3. It may be a flat item such as a card type and a panel type that is relatively thicker than a film.

Among the exemplary articles, the container 20 includes a body 21 for storing contents and a snout 22 formed at an upper end of the body 21 to form an entrance through which the contents enter and exit the body 21. 21 is formed of a protective layer 12 composed of an outer layer 12a and an inner layer 12b that isolates the intermediate layer 11 and the intermediate layer 11 from free space, wherein the outer layer 12a and the inner layer 12b are the same. It may be made of a resin.

In addition, the inner layer 12b is formed to be separated from the intermediate layer 11, and the snout 22 is formed of a single layer 24 in which the outer layer 12a and the inner layer 12b are combined, and the snout 22 is provided. A hole 23 penetrating through the outer layer 12a and the intermediate layer 11 may be further formed in any portion of the body 21 except for the above.

In the container 20 having the structure as described above, the contents are stored in the inner layer 12b separated from the intermediate layer 11, and the inner layer 12b is deformed into an irregular shape while the inside of the container 20 is decompressed according to the discharge of the contents. It contracts while smoothing the discharge of the contents.

The vessel 20, as mentioned in the background art, is an extrusion die called crosshead die is installed at the tip of the extruder to extrude the tube-shaped parison, and then blow the air into the parison to be molded In addition, the discharge pump may be installed at the inlet of the container, and the inside of the container may be reduced in pressure according to the discharge of the contents, thereby forming a multilayer of heterogeneous resins to facilitate the discharge of the contents.

The laminated injection product 10 of the present invention configured as described above has the first aesthetic expression portion 13 provided on the surface of the intermediate layer 11 isolated therein because the protective layer 12 is transparent or at least translucent (color imparted). Aesthetically or intellectually expressing the aesthetic or intellectual content to the outside, the second aesthetic expression unit 14 is also provided in the protective layer 12 itself to express the aesthetic or intellectual content to the outside.

In addition, the protective layer 12 isolates and protects the intermediate layer 11 from the outside, so that damage (scratch, etc.) of the intermediate layer 11 and the first aesthetic expression portion 13 provided in the intermediate layer 11 are prevented. Prevents damage and deformation.

Next, with reference to the accompanying drawings to describe a manufacturing apparatus of the present invention laminated injection molding as follows. However, it will be described with an apparatus for manufacturing the container 20 which is one example of the laminated injection product 10 to help the understanding of the embodiment of the description.

The inventors of the present invention, the injection molding apparatus 1000, as shown in Figs. 4 and 5, while separating the intermediate layer 11 and the intermediate layer 11 from the free space, the protection to project the intermediate layer 11 to the outside A molding part 1100 for molding the container 20 made of the layer 12; A conveying part 1200 which grips the extruded container 20 and transfers the aesthetic expression part forming position; Irradiating a laser to the transferred container 20 according to a preset program to form a first aesthetic expression part 13 on the surface of the intermediate layer 11 isolated from the outside by the protective layer 12, and the protective layer And a display unit 1300 for raising the 12 from the inside to form the second aesthetic expression unit 14.

Here, the molded part 1100 of the present invention is to form a protective layer 12 and the intermediate layer 11 consisting of an outer layer 12a and an inner layer 12b, as shown in the accompanying drawings, FIGS. First and second extruders 1110 and 1120 for supplying the molten resin, respectively, and first resins for molding the resin supplied from the first and second extruders 1110 and 1120 into a parison P. Station 1150 can be configured.

 At this time, the molding unit 1100 has a second station 1160 that blows air into the parison P to form an outer shape of the container 20, and an inner layer 12b of the container 20 that forms an outer shape. It may also be configured to further include a third station 1170 for peeling off the intermediate layer 11 and perforating the pores 23 and a fourth station 1180 for taking out the container 20 in which the pores 23 are formed. .

In other words, the first extruder 1110 supplies molten resin for forming the outer layer 12a and the inner layer 12b of the vessel 20, and the molten resin for forming the intermediate layer 11 is supplied. The second extruder 1120 is installed in the frame 1130, and the molten resin supplied from the first extruder 1110 and the second extruder 1120 is collected in the adapter 1140.

In addition, the front of the adapter 1140 is supplied with the molten resin from the first extruder 1110 and the second extruder 1120 to form the preform forming the outer layer 12a, the intermediate layer 11 and the inner layer 12b, That is, the first station 1150 is provided with an extrusion mold 1152 for molding the parison P in the form of a tube.

At this time, the extrusion mold 1152 may be rotated by a motor (not shown) to move in an easy direction for processing of each station. However, a separate clamping head 1190 may be provided to take out the parison P from the extrusion mold 1152 and transfer it to the machining position. The clamping head 1190 may be provided above the first station 1150 to move a part of the parison P, in particular, a part that becomes the snout 1200, for example, a joint. It may be an arm.

The extrusion mold 1152 installed in the first station 1150 may be formed of upper and lower halves, and form an outer shape of the parison P when the upper and lower halves are joined together. In addition, a hollow, that is, a cavity 1156 is formed inside the extruded mold 1152 and filled with the resin supplied from the adapter 1140 to form an inner shape of the parison P. The core 1154 is installed in the first station 1150.

In addition, one side of the first station 1150, as described above, blowing the air including the molding die 1162 and the blowing pipe 1166 to blow the air into the parison (P) to form the outer shape of the container (20) A second station 1160 in which the device 1164 is installed; A vacuum cap 1172 for exhausting the inner air of the container 20 having the outer shape to the outside to make a vacuum state and peeling the inner layer 12b from the intermediate layer 11, and the intermediate layer 11 and the outer layer from which the inner layer is peeled off. A third station 1170 provided with a punching device 1174 for punching 12a to form a pore 23; A fourth station 1180 for taking out the container 20 in which the pores 23 are formed may be further disposed.

At this time, a series of operations of each station is performed by a microcomputer (not shown) equipped with a program set in advance to sense and control the operation time of the machine related to extrusion molding and ejection, but also not shown in the power supply device. It is obvious that the operation is supplied by the power supply, the description thereof is omitted.

On the other hand, in the present invention, the transfer unit 1200 is a first to transfer the container 20 formed in the first station 1150 or the fourth station 1180 constituting the molding unit 1100 to the next process The grip arm 1210 supporting the container 20 is installed in front of the station 1150. The grip arm 1210 as described above may be an articulated arm that rotates and bends at a predetermined angle and direction while holding a portion of the container 20 to transfer the container 20 to a predetermined position.

On the other hand, the display unit 1300 of the present invention, as shown in Figures 9 and 10 of the accompanying drawings, the laser generator 1310 for generating and outputting the laser of the desired wavelength; A focus controller 1320 for adjusting focus by adjusting an irradiation distance, a reflection distance, and an angle of the laser output from the laser generator 1310; An expression target data input unit 1330 for converting an image of an aesthetic expression unit input through a computer into a vector value by a program; A display object data input unit (1340) for measuring a distance while scanning the surface of the container (20) to detect whether it is in a planar state or a curved state and convert it into a vector value; And a controller 1350 for controlling the reflection distance and the angle of the focus adjuster 1320 by comparing the data of the display target data input unit 1330 with the data of the display target data input unit 1340.

Here, the generation of the laser in the laser generator 1310 is made in a cavity (Cavity) properly set to collect the induced radiated light, both sides of the cavity is blocked by two mirrors, one mirror is very reflective The other high mirror has a slightly low reflectance and may be a device for outputting laser light through the mirror having a slightly low reflectance.

The laser generator 1310 may include a resonator including laser generating materials (He-Ne Gas NdYAG, Ruby, etc.) capable of generating lasers in both mirrors and cavities, and an excitation device, and at both ends of the resonator. It can be by including two mirrors provided.

In the above, the excitation device uses a discharge in the case of a He-Ne laser and a flash lamp in the case of a solid laser, and the light waves induced by the excitation device in the laser medium are several. For example, when the laser medium is He-Cd, 325 mm, 441.6 mm, 537.8 mm and the like are generated, and when He-Ne is 632.8 mm, 1.15 mm, 3.39 mm and the like.

In the present invention, two types of the resonators Nd: YAG-cristalls and carbon dioxide gas laser are applied. The carbon dioxide laser has a wavelength of 10,6 μm, which is medium infrared. The Nd: YAG laser also provides 1064 nm (near infrared), 532 nm.

The focus adjuster 1320 is a device for adjusting the focus of the laser output from the laser generator 1310, that is, the operating point, and adjusts the distance between the laser generator 1310 and the container 20 to provide a primary focus. Matching lifting means 1321; A pair of clearance glasses 1, 2 (1322) and (1323) for reflecting the laser irradiated from the laser generator (1310) to guide the container (20) side; It may be configured to include; each of the rotation / lifting means (1324, 1325) for adjusting the angle and the distance of each lens to focus and the action position.

In this case, the lifting means 1321 may be a multi-arm arm that rotates vertically and horizontally in a state where the laser generator 1310 is installed at a distal end, but the servo motor or the fixing bracket of the laser generator 1310 may be used. The lead screw rotated by the DC motor vertically installed, and the guide frame is also installed vertically through one side of the fixing bracket, and supported by the guide frame on the lead screw rotated by the DC motor. Laser generator 1310 may be an elevator to move up and down, by providing a lead screw and a guide frame rotated by another motor horizontally on one of the support bracket for supporting both ends of the lead screw and the guide frame horizontally. In addition, it may be possible to move horizontally, horizontally or horizontally.

In addition, the pair of lenses 1, 2 1322 and 1323 are reflecting mirrors.

In addition, the rotation / lifting means 1324, 1325 can be rotated by a motor provided on the axis of the frame of the lens 1, 2 1322, 1323, the same configuration as the lifting means 1321 1, 2, 1322 and 1323 can be moved.

The expression target data input unit 1330 includes a program for dividing an aesthetic expression image (a figure and a number of characters) into small lines, for example, lines of 0.03 mm, converting them into distance units, and converting them into vector values. It may be a computer or an operating device.

The display target data input unit 1340 may be a scanner that measures a distance from the container 20 through a value reflected by irradiating infrared rays onto the surface of the container 20 and converts the distance to the vector value.

The controller 1350 adjusts a voltage and a frequency signal to adjust the laser wavelength and intensity of the laser generator 1310, while the vector value of the display target data input unit 1330 and the vector of the display target data input unit 1340 are adjusted. A program for calculating a point at which an aesthetic expression is formed on the surface of the container 20 by comparing the values, and rotating with the elevating means 1321 to control the reflection distance and angle of the focus adjuster 1320 with respect to the calculated point. And a driver circuit for driving the D / C motors of the elevating means 1324 and 1325.

In addition, it is preferable that a jig J for seating and supporting the container 20 transferred by the transfer part 1200 is provided below the laser generator 1310.

In this case, the scan of the container 20 by the infrared rays may be a scan of the intermediate layer 11. If the intermediate layer 11 is scanned as described above and the thickness of the protective layer 12 is input in advance, the distance between the surface of the protective layer 12 may be calculated through the scan value and the thickness value of the protective layer 12. .

In the present invention, the first aesthetic expression portion 13 is formed on the surface of the intermediate layer 11, and the second aesthetic expression portion 14 is formed on the inner surface of the protective layer 12 facing the surface of the intermediate layer 11. Since it forms, it is not necessary to calculate the distance with the protective layer 12 unless the 2nd aesthetic expression part 14 is formed in the surface of the protective layer 12 by necessity.

The detailed description of the action of the present invention, the laminated injection molding apparatus 1000 configured as described above will be omitted, and will be described in the following description.

Next, with reference to the accompanying drawings to describe a method of manufacturing the present invention laminated injection molding as follows.

The present inventors laminated injection manufacturing method as shown in Figure 11, the intermediate layer 11 and the intermediate layer 11 is made of a protective layer 12 to separate the free space, the intermediate layer 11 to the outside projected Molding step (S100) of molding the parison (P) by supplying and extruding each of the resin in the molten state for molding the container 20; A conveying step (S200) of holding the extruded container 20 and transferring the aesthetic expression portion forming position; Irradiating a laser to the transferred container 20 according to a preset program to form a first aesthetic expression part 13 on the surface of the intermediate layer 11 isolated from the outside by the protective layer 12, and the protective layer Aesthetic expression display unit step (S300) of forming a second aesthetic expression unit 14 by raising (12) from the inside can be proceeded to manufacture.

Here, the molding step (S100) of the present invention is to inject the resin for forming the protective layer 12 consisting of the outer layer (12a) and the inner layer (12b) to the extrusion mold 1152 through the first extruder 1110. First injection step (S110); After the first injection step S1110, a second injection for injecting a resin for forming the intermediate layer 11 between the outer layer 12a and the inner layer 12b into the extrusion mold 1152 through the second extruder 1120. Step S120; After the second injection step (S120), the external shape step (S130) to form the outer shape of the container (20); It may proceed to the external shape step (S130), and then, the inner layer shrinkage step of peeling and shrinking the inner layer (12b) in the intermediate layer 11 by exhausting the air inside the state in which the inlet of the container 20 is sealed ( S140 may proceed further.

Meanwhile, in the transfer step S200 of the present invention, the grip arm 1210 operates according to a preset movement between the molding unit 1100 and the display unit 1300 to repeatedly transfer the container 20. .

At this time, the gripping point of the container 20 in the forming unit 1100 is the end point of the program for completely forming and completing the container 20 in the forming unit 1100, which is by a microcomputer, a control device not shown. Judgment is controlled.

On the other hand, the aesthetic expression display unit (S300) of the present invention, the aesthetic expression unit data collection step of converting the image for the aesthetic expression unit input by the expression target data input unit 1330 through a computer to a vector value by a program; (S310); A display target data collection step (S320) of measuring the distance while the display target data input unit (1340) scans the surface of the transferred container (20) to detect whether it is in a planar state or a curved state and converts it into a vector value; An operation value calculation and control step (S330) by which the controller 1350 compares the display object data with the display object data to calculate and control a reflection distance and an angle; The laser processing step (S340) of controlling the focus adjuster 1320 at the calculated reflection distance and angle and oscillating the laser output to form an aesthetic expression portion at a target portion of the container 20 may be performed.

In this case, the process that is performed in the display target data collection step (S320) is operated once when the initial container 20 is input, and the collected data is left intact until a reset is performed for the input of another stacked injection product 10. Applies to laser processing.

Referring to the specific operation of the present invention proceeds as follows.

First, the resin for forming the outer layer 11 and the inner layer 12b of the parison P, which is a state before completion of the container 20, which is an example of the multilayer injection molding product 10, may be connected to the adapter (110). 1140, and a resin for forming the intermediate layer 11 is supplied from the second extruder 1120 to the adapter 1140. At this time, the resin of the first injection step (S110) for forming the outer layer 11 and the inner layer 12a of the parison (P), the polyester (polyester) resin or polyolefin (polyolefine) resin in the first extruder 1110, and to the second extruder 1120 as a resin for forming the intermediate layer 11 in the second injection step (S120) as a polyester-based resin or a polyolefine-based resin To the adapter 1140.

In this way, each resin collected by the adapter 1140 is injected into a mold for forming the outer shape of the container 20 (see FIG. 8 above), and the resin is injected into the mold from the first extruder 1110. The temperature is preferably lower than the temperature of the resin when the resin is injected from the second extruder 120 into the mold.

In addition, the resin injected into the mold in the first injection step S110 to form the outer layer 11 and the inner layer 12b is the resin injected in the second injection step S120 to form the intermediate layer 11. It is preferable that the shrinkage ratio is higher.

Here, the shrinkage is the resin of the first injection step S110 for forming the outer layer 11 and the inner layer 12b of the container 20 and the resin of the second injection step S120 for forming the intermediate layer 11. After forming the outer layer (11) and the inner layer (12b) and the intermediate layer (11), respectively, the degree of shrinkage while being peeled off at an irregular shape according to the pressure change inside the container 20, the higher the shrinkage rate It is sensitive to pressure change and easily shrinks even at small pressures.

In addition, when the resin is injected into the mold from the first extruder 1110 in the first injection step (S110) and then the resin is injected into the mold from the second extruder 1120 in the second injection step (S120) a predetermined time difference After injection, it is cooled and molded.

The container 20 formed as described above is divided into a body 21 for storing the contents and a snout 23 having an inlet for entering the contents. The body 21 includes an outer layer 12a and an intermediate layer 11 and A multi-layer composed of the inner layer 12b is formed, of which the inner layer 12b for substantially storing the contents is peeled off from the intermediate layer 11.

Thus, in order to form the pores 23 in the container 20 in which the inner layer 12b is peeled off, it is necessary to penetrate the outer layer 12a and the intermediate layer 11 by the punching equipment. However, if the inner layer 12b comes close enough to come into contact with the intermediate layer 11 formed on the body 21 portion, the inner layer 12b may be damaged by the punching equipment during the formation of the pores 23. Will be.

Therefore, before the pore 23 is formed, the inner layer 12b should be shrunk to prevent the inner layer 12b from being damaged by the punching equipment, and the air inside the container 20 having undergone the molding step S130 may be removed. By evacuating to the outside, the inside thereof is in a vacuum state, and the inner layer 12b undergoes an inner layer contraction step S140 in which the inner layer 12b shrinks and deforms into an irregular shape.

However, in some cases, the first molding step (S110) and the second injection step (S120) of the preliminary molding step of forming only the preform, that is, parison (P) without completely forming the container 20 ( S122) may be implemented.

First, in the first injection step S110, molten resin for forming the outer layer 12a and the inner layer 12b of the container 20 is supplied to the adapter 1140 through the first extruder 1110, and the In the second injection step S120, the molten resin for forming the intermediate layer 11 of the container 20 is supplied to the adapter 1140 through the second extruder 1120.

In this case, the resin of the first injection step (S110) for forming the outer layer (12a) and the inner layer (12b) of the container 20 is a polyester (polyester) resin or polyolefin (polyolefine) resin in the first extruder ( 1110 and a polyester resin or a polyolefine resin to the second extruder 1120 as a resin for forming the intermediate layer 11 in the second injection step S120. (1140).

Thus, each resin collected in the adapter 1140 is injected into the extrusion mold 1152 for forming the parison P. In this case, when the resin is injected into the extrusion mold 1152 from the first extruder 1110, the temperature of the resin should be lower than the temperature of the resin when the resin is injected into the extrusion mold 1152 from the second extruder 1120. That is, when the resin is injected into the extrusion mold 1152 from the first extruder 1110, the temperature of the resin is 210 to 240 ° C., and the resin is injected into the extrusion mold 1152 from the second extruder 1120. It is preferable that the temperature of is 241-260 degreeC.

In addition, after the resin is injected into the extrusion mold 1152 from the first extruder 1110 in the first injection step (S110) to the extrusion mold 1152 from the second extruder 1120 in the second injection step (S120). When the resin is injected, it is injected with a predetermined time difference. For this reason, the resin and the cavity 1156 are in contact with each other after the resin is injected into the cavity 1156 of the extrusion mold 1152 in the first injection step S110. This is for cooling by heat transfer of surface. This will be described based on FIG. 13.

12 is a schematic view showing a process of forming each of the resin forming the outer layer, inner layer and intermediate layer of the laminated container is injected into an extrusion mold and molded into a parison.

Referring to the drawings, since the resin injected into the extrusion mold 1152 in the first injection step (S110) is higher than the surface temperature inside the cavity 1156 of the extrusion mold 1152, the resin 1156 in the resin Of the resin of the first injection step (S110) injected into the cavity 156 due to heat transfer to the surface of the cavity), the resin contacting the surface of the cavity 1156 is rapidly cooled, and thus, in the second injection step (S120). By mixing with the resin supplied to the extrusion mold 1152, it is possible to prevent the intermediate layer 11 from invading the outer layer 12a and the inner layer 12b of the container 20, thereby resulting in a poor appearance of the container 20. And breakage of the inner layer 12b formed to be peeled off from the intermediate layer 11 can be reduced.

That is, as shown in FIG. 12A, the resin of the first injection step S110 and the resin of the second injection step S120 are collected in the adapter 1140 and the cavity 1156 of the extrusion mold 1152. Ready to be injected into In this state, the resin of the first injection step S110 is first injected into the cavity 1156 of the extrusion mold 1152 as shown in FIG. In this case, only 20 to 50% of the resin of the first injection step S110 is filled in the cavity 1156.

After the resin of the first injection step S110 is filled in the cavity 56, the resin of the second injection step S120 is injected into the cavity 1152 at a predetermined time difference. At this time, after the first injection step (S110), the resin of the second injection step (S120) is injected into the extrusion mold 1152 is preferably injected into the extrusion mold 1152 with a time difference of 0.5 ~ 2 seconds.

In other words, the resin forming the outer layer 12a and the inner layer 12b in the cavity 1156 formed in the extrusion mold 1152 in the first injection step S110 is filled into the filled resin after 20-50%. The cavity 1156 is filled by injecting a resin for forming the intermediate layer 11 of the second injection step S120.

For this reason, if the resin of the first injection step (S110) is completely filled in the cavity 1156, the resin injected into the extrusion mold 1152 in the second injection step (S120) of the spout of the container 20 It does not flow into the cavity 1156 forming the 22.

That is, the resin supplied in the second injection step (S120) must flow through the body 21 of the container 20 to the snout 22 part, and after the molding of the container 20 is completed, the inner layer 12b is the body ( This is because it can be peeled off at the boundary between 21) and the snout 22.

Here, the injection pressure when the resin is injected into the extrusion mold 1152 through the first extruder 1110 in the first injection step (S110) and the extrusion through the second extruder 1120 in the second injection step (S120). The injection pressure when the resin is injected into the mold 1152 must be controlled according to the shape of the cavity 1156, the physical properties of each of the molten resins, and the conditions such as the cavity 1156 surface temperature, which are well understood by those skilled in the art. Could be.

And, as shown in (c) and (d) of Figure 12, as the resin of the second injection step (S120) is continuously injected into the cavity 1156, the resin of the first injection step (S110) is a container ( 20 is flowed into the cavity 1156 forming the snout 22, as shown in (e) of FIG. 12, the first injection step (S110) to the cavity 1156 of the extrusion mold 1152. The resin for forming the outer layer (12a) and the inner layer (12b) and the resin for forming the intermediate layer 11 of the second injection step (S120) is completely filled, but at this time, the resin of the second injection step (S120) Flows only to a part of the spout 22 of the container 20, and the remaining part of the spout 22 of the container 20 is the resin of the first injection step S110 for forming the outer layer 12a and the inner layer 12b. Is formed into a single layer 24 combined.

As described above, when the resin of the first injection step (S110) and the resin of the second injection step (S120) are injected into the extrusion mold 1152, the parison (P) in a gel state that is easy to mold according to the outer shape of the container 20. ) Can be obtained.

As described above, the parison P obtained through the preliminary forming step S122 is transferred to the second station 1160 while a part of the clamping head 1190 is gripped and subjected to the blowing step S124. . This will be described based on FIG. 13.

13 is a schematic view showing a state in which the outer shape of the laminated container is molded by blowing air into the parison molded according to the present invention.

Referring to the drawings, the parison P transferred to the second station 1160 is located inside the molding die 1162 forming the outer shape of the stacked container 20, and in this state the parison ( The blowing pipe 1166 is inserted into the inside of the parison P (inside the body) through the inside of P), that is, through the inlet formed in the snout 22.

In this way, the parison P in a gel state that is easily stretched is located inside the molding die 1162, and when the blowing pipe 1162 is inserted into the parison P, air supplied from the blowing device 1164 is provided. The outer layer 12a forming an outer shell of the parison P on the inner surface of the molding die 1162 that is uniformly sprayed inside the parison P through the blown pipe 1166 to form the outer shape of the container 20. Close to each other, and cooled in this state for a predetermined time to harden the parison P in the gel state before being transferred to the second station 1160.

As described above, when the outer shape of the container 20 is formed through the blowing step (S124), the container 20 is separated from the molding mold 1162 and transferred to the third station 1170 to go through the drilling step (S150). By measuring the pressure change of the air by blowing air into the container 20, after confirming whether the inner layer 1114 is damaged, the container 20 in which the molding is completed is transferred to the fourth station 1180 and the fourth station Extracted at 1180.

The container 20 taken out from the fourth station 1180 is gripped by the grip arm 1210 of the transfer unit 1200, which is a multi-joint robot arm, in the transfer step S200, to the jig J of the display unit 1300. Place it.

As described above, when the container 20 is placed in the jig J, the sensor detects the laser processing operation and proceeds the laser operation operation when the drawing arm 1210 returns to its original position.

Referring to the laser processing operation step by step, first, in the aesthetic expression display unit (S300), the aesthetic expression unit image input by the expression target data input unit 1330 as an image file is divided into small lines, for example, 0.03 mm lines. The unit is converted into a unit and converted into a vector value having a direction as an expression element of the image.

In addition, in the display target data collection step (S320), the display target data input unit 1340 irradiates the surface of the vessel 20 with infrared rays and collects the reflected time state to calculate and measure the distance from the vessel 20. Then, it is converted into a three-dimensional vector value.

Subsequently, in the operation value calculation and control step S330, the controller 1350 compares the data obtained in the display target data collection step S310 and the display target data collection step S320 as described above to the container 20. The elevating means 1321 calculates a position to be processed, that is, calculates a point at which an aesthetic expression portion is formed on the surface of the container 20, and controls the reflection distance and angle of the focus adjuster 1320 to the calculated point. And the D / C motors of the rotation / elevation means 1324 and 1325, and calculate and adjust voltage and frequency signal values to adjust the laser wavelength and the intensity of the laser generator 1310.

In the above description, the scanning of the container 20 by infrared rays of the display target data input unit 1340 is a scan of the intermediate layer 11, and the surface state may be determined through a change in the degree of time reflected and input from the intermediate layer 11. If the intermediate layer 11 is scanned as described above and the thickness of the protective layer 12 is input in advance, the distance between the surface of the protective layer 12 may be calculated through the scan value and the thickness value of the protective layer 12. have.

In the next step of laser processing (S340), the lifting means 1321 primarily sets the focus according to the surface state of the container 20 collected by the display target data input unit 1340.

For example, when the lead screw is rotated by a servo motor or a DC motor vertically penetrated to the fixing bracket of the laser generator 1310, the laser generator 1310 may provide a guide frame horizontally provided on one side of the fixing bracket. Focus as you ride or ascend. Of course, at this time, the lead screw and the guide frame rotated by another motor is provided in one of the support bracket for supporting both ends of the lead screw and the guide frame horizontally, so that it can move horizontally from side to side or back and forth, relatively A wide laminated injection product 10 can also be laser processed.

In this way, when the primary focus is achieved, the laser oscillates in the laser generator 1310 and is output to the surface of the container 20 through the lenses 1, 2 1322 and 1323 of the focus regulator 1320, and the controller. According to the calculated value of 1350, that is, the angle and distance of the lenses 1, 2 1322 and 1323 are adjusted according to the vector value to be processed, the first and second aesthetic expression parts 13 ( 14).

In this case, the first aesthetic expression portion 13 is formed by erosion, engraving or discoloration of the surface of the intermediate layer 11 by laser exposure, and the second aesthetic expression portion 14 is formed by a protective layer ( The inner surface of 12) is made by ridges (myoblasts are generated) through photosensitization or by discoloration.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

In addition, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims.

Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

1 is a cross-sectional view schematically showing a configuration according to an embodiment of the inventors injection molding.

Figure 2 is a perspective view showing the configuration of a container which is an embodiment of the present inventors injection molding.

Figure 3 is a partial cutaway perspective view showing in more detail the configuration of a container that is an embodiment of the present invention laminated injection.

Figure 4 is a simplified block diagram showing the configuration according to an embodiment of the present invention, the laminated injection molding apparatus.

Figure 5 is a plan view showing a configuration according to an embodiment of the present invention laminated injection product manufacturing apparatus.

Figure 6 is a front view showing the configuration according to an embodiment of the molding unit of the inventors injection molding product.

Figure 7 is a plan view showing a configuration according to an embodiment of the molding unit of the inventors injection molding product.

8 is a schematic view showing a state in which the adapter for injecting each resin into the molding portion of the present invention, the injection molding apparatus of the present invention in contact with the extrusion mold installed in the first station.

Figure 9 is a front view showing the configuration according to an embodiment of the molding unit of the inventors injection molding product.

10 is a block diagram showing a configuration according to an embodiment of the molding unit of the inventors injection molding product.

11 is a sequence block diagram showing the steps of the present inventors injection molding method.

Figure 12 is a schematic view showing a process of molding each of the resin forming the outer layer, the inner layer and the intermediate layer of the container in the molding step of the inventors injection molding injection molding into a parison.

Figure 13 is a schematic view showing a state in which the appearance of the laminated container by molding the air blown into the interior of the parison formed in the molding step of the present invention the laminated injection molding method.

<Description of the symbols for the main parts of the drawings>

10: laminated object 11: intermediate layer

12: protective layer 12a, 12b: outer layer, inner layer

13: first aesthetic expression unit 14: second aesthetic expression unit

20: container 21: body

22: snout 1000: molding apparatus

1100: molding 1110: first extruder

1120: second extruder 1130: frame

1140: adapter 1150: first station

1152: extrusion mold 1154: core

1156: cavity 1160: second station

1162: molding mold 1164: blowing device

1166: blown pipe 1170: third station

1180: fourth station 1190: clamp head

1200: transfer unit 1210: grip arm

1300: display unit 1310: laser generator

1320: focusing device 1321: lifting means

1322,1323: Lens 1,2 1324,1325: Rotating and lifting means 1,2

1330: Display target data input unit 1340: Display target data input unit

1350: controller P: parison

Claims (32)

In the stack injection molding apparatus 1000 for injecting different resins to be injected into a multi-layer, First and second extruders 1110 and 1120 for supplying a resin in a molten state to form a protective layer 12 and an intermediate layer 11 each consisting of an outer layer 12a and an inner layer 12b, and the first And a first station 1150 for molding the resin supplied from the second extruders 1110 and 1120 into the parison P, but in one direction of the first station 1150, the first extruder 1110. And an extrusion mold for receiving a molten resin from the second extruder 1120 to form a tube-type parison P, which is a preform forming the outer layer 12a, the intermediate layer 11, and the inner layer 12b. A molding unit 1100 for forming a container 20 comprising an intermediate layer 11 and the intermediate layer 11 from a free space, but having a protective layer 12 projecting the intermediate layer 11 to the outside; A conveying part 1200 which grips the extruded container 20 and transfers the aesthetic expression part forming position; A laser generator 1310 for oscillating and outputting a laser having a desired wavelength, a focus controller 1320 for adjusting focus by adjusting an irradiation distance, a reflection distance, and an angle of the laser output from the laser generator 1310, and a computer; The display target data input unit 1330 converts an image of the aesthetic expression unit input through the program into a vector value by a program, and detects a plane state or a curved state by measuring a distance while scanning the surface of the container 20. The display object data input unit 1340 converts the vector object into a vector value and the data of the display target data input unit 1330 and the data of the display target data input unit 1340 to compare the reflection distance and angle of the focus controller 1320. It includes a controller 1350 for controlling, by irradiating a laser according to a program set in advance to the container 20 conveyed by the transfer unit 1200 by the protective layer 12 And a display portion 1300 which forms a first aesthetic expression portion 13 on the surface of the intermediate layer 11 isolated from the surface, and protrudes the protective layer 12 from the inside to form a second aesthetic expression portion 14. Apparatus for producing a laminated injection, characterized in that. The method of claim 1, The molding unit 1100 forms a second station 1160 that blows air into the parison P to form an outer shape of the container 20, and forms an inner layer 12b in the container 20 that forms an outer shape. And a fourth station 1180 for peeling off the intermediate layer 11 and taking out the container 20 in which the pores 23 are formed, and the third station 1170 for punching the pores 23. Apparatus for the production of injection moldings. The method of claim 1, The extrusion mold (1152) is an apparatus for producing a laminated injection, characterized in that to move in a direction easy to process by a motor. The method of claim 1, Apparatus for producing a laminated injection product, characterized in that a separate clamping head (1190) for drawing the parison (P) from the extrusion mold 1152 and transported to the processing position. The method of claim 4, wherein The clamping head (1190) is provided above the first station (1150), the apparatus for producing a multi-layer injection molding, characterized in that the articulated arm to move in the state holding the snout (1200) a part of the parison (P). The method of claim 2, The transfer unit 1200 may be configured to transfer the container 20 formed at the first station 1150 or the fourth station 1180 constituting the molding unit 1100 to the next process. Apparatus for manufacturing a laminated injection product, characterized in that the grip arm 1210 for supporting the container 20 is installed in front. The method of claim 6, The grip arm 1210 is a multi-joint arm, characterized in that the articulated arm that rotates and bent at a predetermined angle and direction while holding a portion of the container 20 to transfer the container 20 to a predetermined position. Device. The method of claim 1, The laser generator 1310 includes a resonator including a laser generating material capable of generating lasers in both mirrors and a cavity and an excitation device, and two mirrors provided at both ends of the resonator. Manufacturing equipment. The method of claim 1, The focus adjuster 1320 is a device for focusing the laser output from the laser generator 1310. The lifting means 1321 for adjusting the distance between the laser generator 1310 and the container 20 primarily focuses. )and, A pair of clearance glasses 1, 2 (1322) and 1323 for reflecting the laser beam irradiated from the laser generator 1310 and directing it to the vessel 20 side; And rotating / elevating means (1324) (1325) for adjusting the angle and spacing of each lens to adjust the working position and focus. The method of claim 1, A lead screw rotated by a servo motor or a DC motor is vertically installed in the fixing bracket of the laser generator 1310, and a guide frame is also installed vertically through one side of the fixing bracket to the DC motor. Receiving the support of the guide frame on the lead screw to rotate by the laser generator 1310 is an apparatus for producing a laminated injection, characterized in that the elevator is movable up and down. The method of claim 1, The display object data input unit 1330 is a device for manufacturing a multilayer injection product, characterized in that a computer or operating device equipped with a program for converting the input aesthetic display unit image into small lines, converting them into units of distance, and converting them into vector values. . The method of claim 1, The display object data input unit 1340 is a scanner for measuring the distance to the container 20 through a value reflected by irradiating infrared rays to the surface of the container 20, and converts it into a vector value manufacturing Device. The method of claim 1, The controller 1350 adjusts a voltage and a frequency signal to adjust the laser wavelength and the intensity of the laser generator 1310, while the vector value of the display target data input unit 1330 and the vector value of the display target data input unit 1340. And a program for calculating a point at which an aesthetic expression part is formed on the surface of the container 20, and rotating and / or elevating means 1321 to control the reflection distance and angle of the focus adjuster 1320 with respect to the calculated point. An apparatus for manufacturing a laminated injection product, characterized in that it is a driver circuit for driving the D / C motor of the elevating means (1324) (1325). In the laminated injection molding method of injecting different resins and injecting in multiple layers, A first injection step S110 of injecting a resin for forming the protective layer 12 including the outer layer 12a and the inner layer 12b into the extrusion mold 1152 through a first extruder 1110, and the first After the injection step S110, a second injection step S120 of injecting a resin for forming the intermediate layer 11 between the outer layer 12a and the inner layer 12b into the extrusion mold 1152 through the second extruder 1120. And, after the second injection step (S120) comprises an external shape step (S130) to form the outer shape of the container 20, the intermediate layer 11 and the intermediate layer 11 is isolated from the free space, the intermediate layer 11 And a molding step (S100) for molding the parison P by supplying and extruding the resin in the molten state to form the container 20 formed of the protective layer 12 projecting the outside). Molding the container (20) consisting of a protective layer (12) for separating the intermediate layer (11) and the intermediate layer 11 from the free space, but projecting the intermediate layer 11 to the outside Supplying a resin to a molten state, respectively, and molding step of extrusion molding a parison (P) (S100); A conveying step (S200) of holding the extruded container 20 and transferring the aesthetic expression portion forming position; The display object data input unit 1330 converts an image of the aesthetic expression unit input through a computer into a vector value by a program (S310), and the display object data input unit 1340 is transferred. The display object data collecting step (S320) of detecting the plane state or the curved state by measuring the distance while scanning the surface of the container 20 and converting the vector object into a vector value, and the controller 1350 performs the display object data and the display object. Computing an operation value for calculating and controlling the reflection distance and angle by comparing the data (S330), and controlling the focus controller 1320 with the calculated reflection distance and angle, and oscillating and outputting the laser to the container 20. It includes a laser processing step (S340) for forming an aesthetic expression in the target site of the, and irradiated with a laser layer according to a program set in advance in the transferred container 20 to the outside by the protective layer 12 The first aesthetic expression unit 13 is formed on the surface of the intermediate layer 11, and the protective layer 12 is raised from the inside to form the second aesthetic expression unit 14. Method for producing a laminated injection, characterized in that the production. 15. The method of claim 14, The forming step (S100), the inner layer shrinkage step of peeling and shrinking the inner layer (12b) in the intermediate layer 11 by exhausting the air inside the sealed state of the inlet of the container 20 after the outer forming step (S130) (S140) The manufacturing method of the laminated injection, characterized in that further progress. 15. The method of claim 14, In the conveying step (S200), the grip arm 1210 is operated according to a movement set in advance between the molding unit 1100 and the display unit 1300, the transfer of the container 20, characterized in that the repeated injection Manufacturing method. delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete

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