KR101830378B1 - Method of manufacturing injection molding product - Google Patents

Abstract

An objective of the present invention is to provide a manufacturing method of an injection molded product, which is capable of accurately classifying normal injection molded products and defective injection molded products. The manufacturing method of the present invention comprises: a design step of designing a shape of a mold to produce an injection molded product; a prototype mold manufacturing step of forming a prototype mold by moving, in the upward or downward direction according to the design, each of a plurality of piece molds which are formed in a set shape and of which circumferential surfaces are in contact with each other such that the plurality of piece molds are movable in an upward or downward direction; an injection mold manufacturing step of manufacturing an injection mold to be used in the production of the injection molded product; an injection molded material production step of installing the injection mold at an injection machine, in which a lower mold is rotated to a set angle, to produce an injection molded material, rotating the lower mold to the set angle to inspect an appearance shape of the injection molded material, and performing a first defect inspection process of measuring weight of the injection molded material to inspect if the injection molded material is defective, thereby classifying a defective injection molded material; an assembling step of assembling the injection molded material to manufacture the injection molded product; and an injection molded product completing step of fixing the injection molded product to a set jig, connecting the injection molded product-fixed jig to a power operation inspecting device, and performing a second defect inspection process of checking if the power is operated, inspecting an appearance shape of the injection molded product, and measuring weight of the injection molded product, thereby classifying a defective injection molded product.

Description

METHOD OF MANUFACTURING INJECTION MOLDING PRODUCT [0001]

The present technology relates to a method of manufacturing an injection product.

Particularly, when manufacturing an injection product, it is possible to accurately detect the defective part by detecting the defective part of the molded product, and by updating the corresponding part to inspect the corresponding part of the next produced product, The present invention also relates to a method of manufacturing an injection product that can identify a process in which a defect has occurred in real time when a defect occurs in an injection product by inspecting a defect occurrence portion.

Injection molding refers to a process of molding a thermoplastic resin by a plastic molding process to produce a specific product. Injection molding is performed by adding various additives to plastics and putting the compound into a hopper, heating it to melt, and injecting it into the mold through a filling port with a piston. By repeating this, it is possible to mass-produce injection products of a specific shape.

The production process of the injection product is generally shipped through the design stage, the mold processing stage, the injection product manufacturing stage, the assembly stage, and the injection product completion stage. In recent years, techniques for automating each of these steps have been disclosed and studied. However, until now, the cost of all facilities for automation is high, so it is a reality that most of the factories that produce injection products use each worker's work.

However, humans are animals who feel fatigued by simple repetitive movements, and fatigue eventually causes mistakes. The labor force is used at each stage of the production process of the above-mentioned injection product, so that there is a high probability that the injection product is defective. For example, it is highly likely that a person who feels fatigue judges an injection molded product manufactured by a defect as an injection molded product that is normally produced, by visually checking the molded product manufactured in the molded product manufacturing step.

In addition, the human eye can not distinguish defective parts because of the problem that the microscopic part can not be confirmed. For example, when an injection-molded article produced in the step of manufacturing an injection-molded article is defective and the portion where the defective member is formed is microscopic, it is highly unlikely that the molded article with the defective member can be judged to be defective.

In addition, the conventional production process of the injection product has a problem that the steps are shifted to both ends of the set, and defective products are generated on both ends of the set. For example, if it is impossible to determine that defective projections are generated in the step of manufacturing an injection product in the production process of an injection product in which 1000 pieces of injection products are moved to the next process as one unit, There is a problem that the defective injection products are produced and the assembly process is stopped until 1000 normal injection products are manufactured.

Also, in the case of manufacturing a mold according to a design in a production process of a conventional injection product, a prototype mold is manufactured to grasp the shape of the mold, and thereafter, a mold used for producing an actual product in the same shape as the prototype mold In this case, since the same mold was manufactured, labor, cost, and time were doubled.

Accordingly, there is a need for a new manufacturing method of injection products that can overcome the above problems.

&Quot; 10-2017-0109882 " " Automobile interior material using film type substrate and method for manufacturing the same, A flexible filter element having a plastic frame formed by injection molding technique (FLEXIBLE FILTER ELEMENT WITH A PLASTIC FRAME FORMED THEREON BY INJECTION MOLDING)

An object of the present invention is to provide a method of manufacturing an injection product which can accurately classify a normal injection product and a defective injection product.

In addition, the present invention prevents the production of a defective injection object having a predetermined amount in an injection process in which a set amount of injection object is moved in units under a process in which a set amount is moved to the next process, and further, And to provide a method of manufacturing an injection molded article.

It is another object of the present invention to provide a method of manufacturing an injection molded product in which a prototype mold to be supplied to a customer side can be easily manufactured at the time of processing a mold used for manufacturing an injection molded product, thereby reducing cost.

Another object of the present invention is to provide a method of manufacturing an injection molded article which can increase the productivity by intuitively grasping an assembly part of an operator when assembling the injection molded articles.

The technical object of the present invention is not limited to the above-mentioned technical objects and other technical objects which are not mentioned can be clearly understood by those skilled in the art from the following description will be.

A method of manufacturing an injection product according to the present invention includes: designing a shape of an injection mold; A prototype mold manufacturing step of forming a prototype mold by moving each of a plurality of piece molds which are formed in a predetermined shape and circumferential surfaces are in contact with each other and are movable upward or downward according to a design; An injection mold manufacturing step of manufacturing an injection mold to be used for manufacturing an injection mold; The injection mold is installed in an injection machine rotated at a predetermined angle to produce an injection mold. The lower mold is rotated at a predetermined angle to inspect the outer shape of the injection mold, and the first bad An injection molding step of classifying the injection molding in which defects exist by performing inspection; Assembling the injection product to produce an injection product; And the injection product is fixed to a set jig and connected to a power source operation inspection device to perform a second failure inspection for checking whether the power source is in operation, the shape of the appearance and the weight of the injection product, .

Here, in the prototype mold fabrication step, the prototype mold includes a peripheral cover having upper and lower openings, a mounting space formed on the inner side, and a fixed protrusion protruding by a predetermined length on the non-edge portion. Wherein at least one of circumferential surfaces having a predetermined length is formed with a fixing groove portion to be in contact with and fixed to the fixing protrusion portion, Wherein one of the outer piece molds is formed with one of the fixing protrusions or the insertion grooves and the other one of the outer piece molds is disposed adjacent to the other, And the fixing protrusion is inserted and fixed in the insertion groove.

The outer piece die disposed on the edge side of the peripheral cover of the outline piece mold has a wall portion formed on the circumferential surface in the side direction along the longitudinal direction and a bent portion bent inward from the end portion of the wall portion Wherein a slit groove formed by the wall portion and the bent portion is formed and a circumferential face of the corner piece mold inserted and fixed to a corner side of the peripheral cover is provided with a central protruding portion and a flange portion formed outwardly from both sides of the central protruding portion, A slice protrusion corresponding to a shape of the slice groove is formed by the slice movement, and the edge piece mold is connected to the outer piece mold through a slice movement and is fixed.

The center piece mold in which the slice grooves or the slice protrusions are formed on the peripheral surface of the slit groove or the slice protrusion is formed on the inner circumferential surface of the inner periphery of the outer piece mold, And protrusions are connected and arranged.

Here, the center piece dies include a mold body body having a screw thread formed along a longitudinal direction at a central portion thereof, a slit groove and a slice protrusion formed on a circumferential surface thereof, and an insertion bolting portion formed at one side thereof; And a predetermined shape is formed on the upper portion of the movable auxiliary body and the movable auxiliary body, which are spaced apart from each other by a predetermined distance so as to confirm the degree of movement of the mold body, And a mold body inserted and fixed in the insertion bolt portion to form a shape of a lower mold.

Here, the lower mold used in the injection mold manufacturing step may be rotated at a predetermined angle, and may include a manufacturing step of manufacturing an injection molding having a predetermined shape in accordance with the rotation of the lower mold, the appearance data of the molding, And the appearance data is compared with pre-stored reference image data to detect the failure of the injection molding. If a failure is detected, the feature point of the failure occurrence portion is detected and uploaded to the failure data and stored, A failure detection step of detecting a failure by comparing the measured weight with predetermined weight data, a display step of displaying a part to be assembled and connected to the non-defective injection molding in the failure detection step, and a step of classifying the displayed injection molding and the non- And storing them.

Here, in the manufacturing step, a temperature sensor for continuously measuring the temperature of the mold is provided. In the defect detection step, if the temperature measured by the temperature sensor is measured to be equal to or higher than a predetermined reference temperature value, And a virtual assembling step of assembling the simulated molded object and assembling the simulated molded object to judge whether the molded object is defective or not.

Here, in the injection product completing step, a weighting step of measuring the weight of the injection product fixed to the jig and fixing the injection product to the jig and checking whether the injection product is positioned within the allowable range by comparing with the preset reference weight, The external product data of the injection product is generated by photographing the injection product with a camera to detect the characteristic points, and it is compared with the preset reference injection product data to check whether it is defective. And an injection product defective detecting step of judging a process in which the defective product of the injection product is generated according to the position of the defective product and a step of connecting the injection product, And a power supply failure measuring step of measuring whether the power supply is operating or not.

The method of manufacturing an injection product according to the present invention, which is implemented through the above-described steps or configuration, determines whether an injection molded product is defective through a mold rotated in an injection molded product manufacturing step, It is possible to efficiently classify the normal injection molding and the defective injection molding, and to increase the productivity in the assembling step.

In addition, the method of manufacturing an injection product according to the present invention can reduce the labor, time, and cost consumed in manufacturing the prototype mold by allowing the prototype mold to be manufactured through assembly.

In addition, the method of manufacturing an injection product according to the present invention stores a defective part of an injection molded article which has been defective, prevents the defective injection molded article from being shipped by checking the defective part again at the injection molded article completion step, It is possible to determine which step the generated step is at, and quickly cope with it.

In addition, in the method of manufacturing an injection product according to the present invention, when it is determined that the probability of production of a defective injection object is high according to a predetermined determination even when it is determined that the injection object is normal injection article, the recognized injection object is virtually formed, It is possible to prevent the production of the defective injection product by judging whether or not the defective injection product is manufactured by assembling it with the molded product.

1 is a block diagram of a method of manufacturing an injection product according to the present invention.
FIG. 2A shows a prototype mold in the method of manufacturing an injection product according to the present invention, FIG. 2B shows a peripheral cover of a prototype mold, FIG. 2C shows an outer piece mold of a prototype mold And Fig. 2D shows a centerpiece mold of the prototype mold.
FIG. 3A is a view showing a lower mold in the step of manufacturing an injection product in the method of manufacturing an injection product according to the present invention, FIG. 3B is a diagram showing a failure detection step in the method of manufacturing an injection product according to the present invention, The method of uploading bad data in the defect detection step is shown.
FIG. 4A is a view showing a step of completing an injection product in the method of manufacturing an injection product according to the present invention, and FIG. 4B is a block diagram showing a process of sequentially performing an injection product completion step in the method of manufacturing an injection product according to the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to exemplary drawings. However, this is not intended to limit the scope of the invention.

It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In addition, the size and shape of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, terms specifically defined in consideration of the constitution and operation of the present invention are only for explaining the embodiments of the present invention, and do not limit the scope of the present invention.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise. It should be noted that the terms such as " part, "" module, " .

1 is a block diagram of a method of manufacturing an injection product according to the present invention.

The method of manufacturing an injection product according to the present invention includes the steps of designing S1, prototype mold manufacturing S2, injection mold manufacturing S3, molding process S4, assembling S5, ).

The designing step S1 is a step of designing an injection mold for producing an injection molded article which is a constituent of an injection product, in order to produce an injection product commissioned by a customer. That is, the injection product is a step of designing a plurality of injection molds since the injection molds can be manufactured by mutually connecting and combining.

The injection mold is recessed by a different length upward from the lower surface with respect to the cavity. On the other hand, two molds are manufactured. One is a prototype mold which is not actually used for injection molding, but which confirms the shape of the customer and the mold, confirms that the shape of the mold for manufacturing the injection molding is properly processed, and the other is a prototype mold And is an injection mold used when manufacturing actual injection products.

In such a case, two molds of the same shape must be manufactured, so that time, cost, and the like are consumed and the productivity is lowered. In order to overcome such a problem, the method of manufacturing an injection product according to the present invention increases the productivity by forming a prototype mold as a piece.

In the designing step S1, the shape of the injection mold used for manufacturing the injection molding used for manufacturing the injection molding is designed. The controller matches the designed injection mold design with a piece mold design that is assembled into a set shape.

When the injection mold design is matched with the piece mold design by the control unit, the kind of the piece mold, the height of the piece mold, and the like are calculated. The prototype mold can be manufactured by adjusting the height of the piece mold according to the piece mold design and installing the piece mold described in the piece mold design.

FIG. 2A shows a prototype mold in the method of manufacturing an injection product according to the present invention, FIG. 2B shows a peripheral cover of a prototype mold, FIG. 2C shows an outer piece mold of a prototype mold And Fig. 2D shows a centerpiece mold of a prototype mold.

The prototype mold manufacturing step S2 is a step of fabricating a prototype mold by moving a piece mold, which is manufactured in a predetermined shape (for example, a quadrangle), and whose circumferential surfaces are in contact with and connected to each other, to be.

The prototype mold comprises a perimeter cover 100, an outer piece mold 200, a corner piece mold 300, and a center piece mold 400.

The perimeter cover 100 is formed with an arrangement space 120 on its inner side and a fixed protrusion 110 protruding by a predetermined length is formed on the non-edge portion along the inner periphery. The outer piece mold 200, the corner piece mold 300, and the center piece mold 400 are disposed in the arrangement space 120 of the peripheral cover 100. Here, the fixing protrusion 110 of the peripheral cover 100 is fitted into the fixing groove 210 of the outer mold 200 so that the outer mold 200 can be supported.

The outer piece die 200 has a predetermined length, and the fixing groove 210 is formed on the circumferential surface of any one of the circumferential surfaces. The fixing protrusion 220 or the insertion groove 230 is formed on the circumferential surface other than the circumferential surface of the portion of the outline piece mold 200 where the fixing groove 210 is formed. For convenience of description, it is assumed that the outer piece die 200 is formed in a square shape, and the circumferential surface on which the fixing groove portion 210 is formed is defined as a first circumferential surface, I'll call it the fourth circumference.

For example, the fixing protrusion 220 is formed on one of the second circumferential surface and the fourth circumferential surface of the outer piece mold 200, and the other one of the insertion grooves 230 is formed. Either the fixing protrusion 220 or the insertion groove 230 is not formed on either the second circumferential surface or the fourth circumferential surface of the outer piece mold 200 according to the embodiment, Grooves 230 may be formed. The fixing protrusions 220 and the insertion grooves 230 are not problematic if the outer piece molds 200 supported by the peripheral cover 100 through the fixing recesses 210 can be mutually supported.

The adjacent piece die 200 disposed adjacent to each other is formed with a fixing groove 210 in which the fixing protrusion 110 of the peripheral cover 100 is disposed and supported on the first circumferential surface, The fixing protrusion 220 formed on the fourth circumferential surface of the outer piece die 200 may be disposed in the insertion groove 230 formed on the second circumferential surface of the other outer piece mold 200 and be mutually supported. A slide groove 240 or a slide protrusion 310, which will be described later, is formed on the third circumferential surface. Details will be described later.

The outer piece die 200 disposed adjacent to the edge of the peripheral cover 100 of the outer piece die 200 supported by the peripheral cover 100 may be formed in a different shape from the other outer piece die 200 have. This is because the corner piece mold 300 is disposed at the edge of the perimeter cover 100.

This will be described with reference to the outer piece mold 200 indicated by the area A shown in FIG. 2A and FIG. 2C. The fixing protrusion 220 or the insertion groove 230 is not formed on the fourth circumferential surface of the outer piece mold 200 disposed adjacent to the edge of the peripheral cover 100 and the slide groove 240 is formed. The slide groove 240 includes a wall portion 241 and a bent portion 242. The wall portion 241 is spaced apart to form a groove. The bent portion 242 is formed in a shape bent inward at the end of the wall portion 241. [ Therefore, the wall portion 241 serves to reduce the length of the groove formed apart.

The slide grooves 240 formed in the outer piece mold 200 are engaged with the slide protrusions 310 formed on the corner piece mold 300. The slide protrusion 310 is formed to correspond to the shape of the slide groove 240. The slide protrusion 310 is composed of a central protrusion 311 and a flange portion 312. Referring to FIG. 2d, the slide protrusion 310 includes a central protrusion 311 and a flange 312 formed on both sides of the center protrusion 311. Here, according to the embodiment, the slide protrusion 310 may be formed in the outer piece die 200, and the slide groove 240 may be formed in the edge piece mold 300.

The slide protrusions 310 or the slide grooves 240 may be respectively formed on the portions of the outer piece mold 200 or the edge piece mold 300 that are not in contact with the peripheral cover 100. [ The circumferential surface of the outer piece mold 200 and the corner piece mold 300 which are not in contact with the outer piece mold 200, the corner piece mold 300 or the peripheral cover 100 are abutted against the center piece mold 400 Respectively.

Here, the outline piece mold 200 and the edge piece mold 300 are manufactured with the length or the shape of the lower part being predetermined. Therefore, the shape of the injection mold that actually produces the injection product can be simulated.

The outer piece mold 200 and the corner piece mold 300 fill the outer surface of the arrangement space 120 of the peripheral cover 100 in this manner. The center piece mold 400 is disposed in the placement space 120 except for the outer surface of the peripheral cover 100. Here, the centerpiece mold 400 has a predetermined shape and has a circumferential surface. For example, when the center piece mold 400 has a rectangular shape, it has four circumferential surfaces. The slide protrusions 310 or the slide grooves 240 may be formed on the four circumferential surfaces of the center piece mold 400. [ More precisely, it is formed in the mold body 410 as will be described later. The slide protrusions 310 or the slide grooves 240 formed on the circumferential surface of the center piece metal mold 400 may be formed in the outer piece mold 200, the edge piece mold 300 or the other center piece mold 400 ).

The center piece mold 400 is composed of a mold body 410, a movement assisting body 420, and a mold body 430. The mold body 410 has a slide protrusion 310 or a slide groove 240 formed on the circumferential surface thereof. At the center of the mold body 410, a central portion is formed along the longitudinal direction from the upper side to the lower side. The central part includes threads. At the center, a movement assisting body 420 is disposed.

The moving assisting body 420 is connected to the central portion through a screw thread formed in the longitudinal direction. The movement assistant body 420 is formed with a display portion for moving intervals along the longitudinal direction. The display unit indicates that the mold body 410 is moved upward or downward with respect to the reference plane, for example, the case where it is located in the standard state. When the movable body 420 is rotated in one direction, the mold body 410 moves upward. When the movable body 420 is rotated in the other direction, the mold body 410 moves in the opposite direction. In this case, The body 410 is slid and the moved distance can be visually confirmed. Accordingly, the position (upper or lower) of the center piece mold 400 can be adjusted through the same manner as the piece mold design, and the center piece mold 400 can be precisely positioned at the corresponding position.

A bottom portion of the mold body 410 is formed with an insertion bolting portion formed at a depth set to surround the center. A mold body 430 is disposed in the insertion bolt portion. The lower portion of the mold-shaped body 430 is formed in a predetermined shape. For example, a recessed shape, a square shape, or a shape in which a plurality of voids are formed at predetermined intervals. The mold body 430 is engaged with the insertion bolt portion and is released and can be connected to the mold body 410 and fixed. Various shapes can be formed by connecting the mold body 430 formed in a predetermined shape to the mold body 410. [

The user fixes the length and the bottom shape of the outer piece mold 200 according to the design of the piece mold and arranges the corner piece mold 300 as the outer piece mold 200 and arranges the center piece mold 400, The mold body 430 is replaced and the movable body 420 is rotated to move the mold body 410 upward or downward to combine the shapes in which the plural mold bodies 430 are adjacently connected to each other A prototype mold having the same shape as an injection mold can be easily manufactured. The prototype mold thus manufactured is used to identify the problem of the design, and the height of the mold body 410 is regulated, and the mold body 430, which is connected to the mold body 430, It is possible to reuse the mold of the new type by connecting the mold 410 to the mold 410. Thus, the mold in which the problem is solved can be confirmed in real time.

FIG. 3A is a view showing a lower mold in the step of manufacturing an injection product in the method of manufacturing an injection product according to the present invention, FIG. 3B is a diagram showing a failure detection step in the method of manufacturing an injection product according to the present invention, The method of uploading bad data in the defect detection step is shown.

The injection mold making step S3 is a step of manufacturing an injection mold used for manufacturing an actual injection mold according to the mold of the final type determined to be free from problems through the prototype mold.

The molded article manufacturing step S4 is a step of producing an injection molded article using an injection mold. In the step S4 of molding the injection mold, an injection mold is installed in an injection molding machine in which the lower mold is rotated at a predetermined angle, and the mold is rotated at a predetermined angle to check whether the injection molding is defective, 1 failure inspection is performed, and if it is a normal injection, a portion connected to another injection object or configuration is displayed, and finally, the normal injection object and the faulty injection object are classified.

The molded article manufacturing step S4 comprises a manufacturing step A1, a defect detection step A2, a display step A3, and a classification step A4.

In the manufacturing step A1, an injection mold is connected to an injection molding machine in which a lower mold is rotated at a predetermined angle, thereby manufacturing an injection molding. The injection machine is equipped with a temperature sensor. The temperature sensor is connected to the control unit. When the injection mold is manufactured, the lower mold is rotated at a predetermined angle. When the lower mold is rotated at the set angle, a failure detection step (A2) is performed. In the failure detection step A2, it is determined whether or not the injection object is defective by using a fixed camera. The camera is connected to the control unit. The control unit generates appearance data by detecting the minutiae of the appearance of the article based on the photographed image or photograph using the camera. The control unit compares the appearance data with the reference injection data. The reference injection data is data generated by detecting feature points of the normal injection molding. That is, the control unit compares the minutiae points of the generated injection object with the minutiae points of the normal injection object to determine whether the generated injection object is defective or not.

Here, it is preferable that the camera for photographing the appearance of the molded article is provided at least in a portion where a large amount of defects are generated. For example, if the extruded product is extremely thin, it may be possible to focus the very small part of the extruded product to produce feature points. In another embodiment, when the direction in which the plastic pigment is injected is unidirectional, it is preferable to photograph the other direction side of the injection object intensively to derive the characteristic points.

Firstly, the failure of the injection molding is judged through the appearance, and then the failure of the injection molding is detected by measuring the weight of the injection molding. The reason for this is that when the manufactured injection product is defective, most of the plastic particles are not solidified after a sufficient amount of plastic pigment is placed in a specific local area. In this case, the weight difference is caused by the difference in the pigment as compared with the normal injection product. The lower mold is equipped with a load cell, and the load cell transfers the measured weight to the control unit. The control unit stores preset weight data. The weight data is used to determine the set error range from the weight of the normal injection molding as a normal injection molding. If it is judged to be normal injection molding by inspecting the defect of the injection molding through the visual inspection, if the measured weight is out of the set error range, it can be judged that it is not a normal injection molding.

On the other hand, the control unit continuously examines the appearance of the injection object and continuously stores the position of the minutiae point of the detected defective portion in the bad data. The defective data is continuously updated through this to check the updated part of the injection product manufactured by combining the injection products to prevent the defective injection product from being shipped. Details will be described later.

When the temperature of the injector is measured to be higher than a preset reference temperature value through the temperature sensor, the control unit generates simulation data simulating the shape of the injection object photographed through the camera, and simulates the injection object to be connected in the post- And it is judged whether or not there is a defect. This is because, when an injection molding machine produces an injection molding at an abnormal temperature, there is a high probability that the injection molding is defective. If the injection moldings produced at the injection molding machine have such temperature, it may be normal for the appearance inspection, but if the projecting parts are connected to other injection molding products, they can not be assembled into the injection molding product after the assembly process.

In addition, the controller divides the weight data into the first weight data and the second weight data. The first weight data is a range of weights in which normal injection molding is determined to be normal, and the second weight data is a range of weights at the boundary between the normal injection molding and the defective portion.

The control unit repeats the same operation as described above when the injection object is determined by the second weight data. That is, the simulation data generated by simulating the shape of the injection object photographed through the camera is generated, and the simulated injection object is assembled with a virtual injection object created by simulating other injection objects to be connected in the post-process to judge whether or not the injection object is defective.

Accordingly, the present invention judges the defective injection molding accurately through the above-described method.

If it is determined through the above-described steps or the like that the article is not a defect, the display step A3 is performed. The display step A3 is to display the part to be connected with the other molded article or the constitution of the molded article by using a sticker or paint. The part to be connected with other components can not be observed from the external appearance, so that the productivity can be increased because the worker can intuitively grasp the part to which the injection object is connected at once without deteriorating the merchantability.

On the other hand, it is a matter of course that the display step A3 is not performed on the injection object determined to be defective in the failure detection step A2. Depending on the operator, it may be a step of attaching rfid or the like to the display step (A3). It is natural that the number of normal injection molds can be measured in real time.

The classification step A4 is a step of classifying the injection objects (normal injection objects) on which the display step A3 has been performed and the injection objects (non-injection objects) that are not. When the set amount of stacked injection objects is accumulated, the assembly step S5 is performed.

The assembling step S5 is a step of assembling the injection molding with another injection molding or the like. Here, the injection object may be connected to another apparatus which is operated by receiving power. When the set amount of the injection product is accumulated through the assembly, the injection product completion step (S6), which is a final defect inspection by the set amount, is performed.

In the injection product completion step (S6), the injection product is fixed to a jig and connected to a power source operation inspection device, and a second failure inspection is performed to measure the formation inspection weight of the power source and appearance, .

FIG. 4A is a view showing a step of completing an injection product in the method of manufacturing an injection product according to the present invention, and FIG. 4B is a block diagram showing a process of sequentially performing an injection product completion step in the method of manufacturing an injection product according to the present invention.

The injection product completion step S6 is performed in the order of the fixing step B1, the weight examination step B2, the injection product failure detection step B3, and the power failure measurement step B4. This is because it is not meaningful to carry out another step if it is judged to be defective at each step. For example, even if the injection product works well in the power test, if the appearance is defective, the injection product is defective. However, regardless of the result of the weight review step (B2), the injection product failure detection step (B3) proceeds because the reason for this will be described later.

The fixing step B1 is a step of fixing the injection product to the jig.

In the present invention, the operator merely fixes the injection product to the jig. When the fixing is performed, the control unit sequentially operates the load cell, the camera, and the power test apparatus to determine whether the injection product is defective.

In the weight review step (B2), the control unit judges whether the injection product fixed to the jig is in the normal injection product as compared with the reference weight. In this case, even if the reference weight is exceeded, an injection product failure detection step (B3) as the next step is performed.

In the injection product defective detection step (B3), the control unit derives minutiae points of the injection product using a camera, compares the minutiae points of the injection product with the minutiae points of the normal injection product, and checks whether the appearance of the injection product is defective. In addition, the control unit detects the failure of the molding in the molding production step (S4), loads the stored failure data, and again checks whether the failure has occurred at the corresponding position. In this way, if a failure occurs in the injection product, the control part can identify the process in which the failure has occurred and inform the operator of the failure.

For example, if the injection product is determined to be defective in the weight review step B2 and the normal product is determined in the injection product failure detection step B3, the failure of the injection product is generated in the assembly step S5. As another example, if it is determined that the injection product is a normal product in the weight review step B2 and the minutiae point of the injection product is calculated in the injection product failure detection step B3, It can be determined that a failure has occurred.

As another example, if the minutiae point of the injection product is derived from the weight review step (B2) and the injection product failure detection step (B3), it is judged to be defective and it is judged that the injection product is a normal injection product. It is possible to determine that a defect has occurred in the molded article manufacturing step S4 if a defect occurs at the same position as the defective position generated in the step S4.

In this way, it is possible to quickly determine whether a defect has occurred in a certain process and to quickly recognize and correct the problem of the process.

The power supply failure measuring step B4 is a step of finally determining whether the injection product is operated on the power supply through the power supply test apparatus.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims It will be apparent to those of ordinary skill in the art.

S1: Design phase S2: Prototype mold production phase
S3: Injection mold making step S4: Injection molding step
S5: Assembly step S6: Injection product completion step
100: perimeter cover 110: fixed protrusion
120: placement space 200: outer piece mold
210: fixing groove portion 220: fixing projection
230: insertion groove 240: slide groove
241: wall portion 242:
300: Corner piece mold 310: Slide projection
311: central protrusion 312: flange portion
400: central piece mold 410: mold body body
420: moving assistant 430: mold body
A1: Manufacturing step A2: Bad detection step
A3: indication step A4: classification step
B1: Fixed phase B2: Weight review phase
B3: Injection product defect detection step
B4: Power failure measurement step

Claims (8)

A designing step of designing the shape of the injection mold;
A prototype mold manufacturing step of forming a prototype mold by moving each of a plurality of piece molds which are formed in a predetermined shape and circumferential surfaces are in contact with each other and are movable upward or downward according to a design;
An injection mold manufacturing step of manufacturing an injection mold to be used for manufacturing an injection mold;
The injection mold is installed in an injection machine rotated at a predetermined angle to produce an injection mold. The lower mold is rotated at a predetermined angle to inspect the outer shape of the injection mold, and the first bad An injection molding step of classifying the injection molding in which defects exist by performing inspection;
Assembling the injection product to produce an injection product; And
The injection product is fixed to a set jig and connected to a power source operation inspection device to perform a second failure inspection to check the power operation, the shape inspection of the appearance and the weight,
≪ / RTI > The method according to claim 1,
In the prototype mold fabrication step,
The prototype die has a protrusion-
A circumferential cover having an upper portion and a lower portion which are opened and an arranging space is formed on the inner side and a fixed protrusion protruding by a predetermined length is formed on a portion which is not an edge;
Wherein at least one of circumferential surfaces having a predetermined length is formed with a fixing groove portion to be in contact with and fixed to the fixing protrusion portion, And an outer piece mold in which one of the insertion grooves is formed,
One of the outer piece molds is formed with one of the fixing protrusions or the insertion grooves and the other one is formed in the other outer piece metal mold disposed adjacent thereto so that the fixing protrusion is inserted and fixed in the insertion groove
≪ / RTI > 3. The method of claim 2,
Wherein the outline piece mold, which is disposed on a corner side of the peripheral cover,
And a slit groove formed by the wall portion and the bent portion is formed on the circumferential surface of the corner in the side direction, the wall portion being formed to be spaced apart along the longitudinal direction and the bent portion bent inward at the end portion of the wall portion,
A slice protrusion corresponding to the shape of the slice groove is formed by a central protrusion and a flange portion formed on both sides of the center protrusion on one circumferential surface of the corner piece mold inserted and fixed to the edge of the peripheral cover
Wherein the edge piece mold is connected to and fixed to the outer piece mold through slice movement
≪ / RTI > The method of claim 3,
Wherein one of the slice groove and the slice projection is formed on an inner circumferential surface of the outer piece die,
And the central space piece molds in which the slice grooves or slice projections are formed on the peripheral surface are connected to the slice grooves and the slice projections
≪ / RTI > 5. The method of claim 4,
The central-
A mold body body having a screw thread formed along a longitudinal direction at a central portion thereof and formed with a slit groove and a slice projection on a circumferential surface thereof and an insertion bolting portion formed on one side thereof; A moving auxiliary body and a predetermined shape are formed on the upper portion of the body to move the body body upward or downward, And includes a mold-shaped body fixed to form a shape of a lower mold
≪ / RTI > The method according to claim 1,
A lower mold used in the injection molding process may be rotated at a predetermined angle, and an injection molding process may be performed to manufacture an injection molding having a predetermined shape according to the rotation of the lower mold. The appearance data of the injection molding, And detecting the defect of the injection molding by comparing the appearance data with pre-stored reference injection molding data. When a defect is detected, the feature point of the defect occurrence portion is detected and uploaded to the defective data and stored, A failure detection step of detecting a failure by comparing the measured weight data with predetermined weight data, a display step of displaying a part to be assembled and connected to the non-defective article in the failure detection step, and the displayed and unmarked in- Classification stage
≪ / RTI > The method according to claim 6,
In the manufacturing step,
A temperature sensor for continuously measuring the temperature of the mold is installed,
In the defect detection step,
When the temperature measured by the temperature sensor is measured to be equal to or higher than a predetermined reference temperature value, simulation data is generated by simulating the shape of the injection molding through the feature points, and the injection molding product generated by simulating the injection molding is assembled Virtual assembly phase
≪ / RTI > 8. The method of claim 7,
In the injection product completing step,
A step of fixing the injection product to a jig and a step of measuring the weight of the injection product fixed to the jig and comparing the injection product with a predetermined reference weight to check whether the injection product is within the allowable range; The appearance data of the injection product is generated and compared with the preset reference injection product data to check whether it is defective or not. The defect data is compared with the uploaded defect data to check whether the defective product is defective or not, An injection product failure detecting step of judging a process in which the injection product is defective according to a position of the injection product, and a power supply failure measuring step of measuring the power supply operation by connecting the injection product, step
≪ / RTI >

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