Apparatus and Method for Integrated Deburring, Anti-static Treatment, and Drying of Bulk Plastic Injection-Molded Parts

Abstract

An embodiment of the present invention relates to an integrated processing device for burr removal, antistatic treatment, and drying of a bulk plastic injection molded product, comprising: a main body providing a removal space into which a thermosetting plastic injection molded product is introduced to remove burrs; a rotary drum module rotatably installed within the removal space and having a plurality of discharge holes formed on its surface; an abrasive storage unit disposed below the rotary drum module, in which an abrasive supplied to the removal space is stored and the abrasive falling through the discharge holes is recovered; an abrasive circulation module providing power to supply the abrasive from the abrasive storage unit to the removal space; and a dust collection discharge module for forcibly sucking in air inside the removal space to discharge fine dust generated during the burr removal process to the outside of the device.

Description

Technology Field

[0001] The present invention relates to post-treatment of molded articles formed in bulk, such as thermosetting or thermoplastic PPS resin products, and in particular to an automatic processing apparatus and method that collectively performs, within a single chamber, a process of removing burrs (flash) generated immediately after injection, suppressing the generation of static electricity on the product surface caused by such burrs, and also removing residual moisture that was washed with water to remove the burrs (flash) thereafter. Background Technology

[0003] Thermosetting plastics (phenol resin, melamine resin, epoxy resin, etc.) and thermoplastic plastics (PPS, etc.) are widely used across industries requiring high heat resistance and durability, such as electrical / electronic components, automotive parts, and kitchenware. Due to the characteristics of the raw materials, thin, unwanted protrusions known as "burrs" or "flashes" inevitably occur along the parting line where the mold separates after injection or compression molding processes. Unlike burrs or flashes from most thermoplastics, which are tough and flexible, burrs or flashes from thermosetting and some thermoplastics are very hard and brittle. To ensure the normal use of parts and products after injection or compression molding, a process must inevitably be required to remove these burrs or flashes from continuously mass-produced products.

[0004] Conventionally, to remove these burrs, workers manually removed the burrs (flash), or a method was used in which large or small quantities of parts and products were placed in a container of four or more sides with a front surface perforated to prevent the products from passing through, and the container was rotated so that the burrs (flash) exited through the perforations. However, this method caused the following serious problems.

[0005] First, there is the issue of fine dust generation and product contamination. Due to the high brittleness of burrs in thermosetting plastics, the burr (flash) removal process involves not merely abrasion but rather fine fragmentation or grinding. This process generates a large amount of sharp, fine dust. This fine dust combines with static electricity generated by friction with the plastic product itself, causing a re-adhesion phenomenon where it strongly adheres to the product surface. This not only degrades the appearance quality of the product but has also become a cause of serious defects, such as impairing insulation performance in the case of electrical components.

[0006] Second, there is the issue of uneven burr (flash) removal and product damage. The simple barrel method causes products to collide randomly with each other inside a square container with open sides. In this case, if products are rotated while impacting each other for a long time to effectively remove hard burrs (flash), there is a risk that the main body of the product, rather than the burr (flash), will be damaged or broken. Conversely, if products are rotated with less impact for a shorter period to minimize collisions out of concern for product damage, uneven quality occurs, where burrs (flash) in corners or complex shapes are not properly removed.

[0007] Third, the previous process had a problem regarding the removal of burrs by causing products to collide with each other. After the burr (flash) removal operation was completed, the interior of the tetrahedral or larger container was perforated at the front to allow the burr (flash) residue to escape; however, the crushed burr (flash) residue attached to the products and the damaged products were all mixed together. In the conventional method, after pouring out this mixture, an operator had to manually sort and re-process the items, or use a separate, complex sieving device to wash and dry the products with attached burr (flash) residue. This process was very cumbersome and time-consuming, imposed significant limitations on large parts and large quantities, and acted as a major bottleneck in implementing a fully automated process.

[0008] Therefore, there is an urgent need for a highly efficient automated burr / flash removal device that improves productivity and quality simultaneously by automating and batching the removal of burrs / flashes generated during molding of thermosetting plastics and some thermoplastic plastics without damaging the product body, while fundamentally solving the critical fine dust and electrostatic problems that occur during this process and reducing time by feeding a large number of molded products in bulk. Prior art literature

[0009] 10-2020-0075658 (Title of Invention: Burr Removal Device for Cast Products) The problem to be solved

[0010] The present invention is proposed to solve the aforementioned problems and aims to provide a highly efficient automated integrated processing device for burr removal, antistatic treatment, and drying of bulk plastic injection molded products, which effectively removes hard and brittle burrs without damaging the body of the thermosetting plastic and thermoplastic plastic molded product, while fundamentally preventing product contamination caused by fine dust and static electricity generated during this process, and automatically separating and circulating the finished product from which the burrs have been removed and the abrasive. means of solving the problem

[0012] An integrated processing device for burr removal, antistatic treatment, and drying of a bulk plastic injection molded product according to an embodiment of the present invention comprises: a main body providing a removal space in which a thermosetting plastic and a thermoplastic plastic injection molded product is introduced in bulk and a burr is removed; a rotary drum module rotatably installed within the removal space and having a plurality of discharge holes formed on its surface; an abrasive storage unit disposed below the rotary drum module, in which an abrasive supplied to the removal space is stored and the abrasive falling through the discharge holes is recovered; an abrasive circulation module providing power to supply the abrasive from the abrasive storage unit to the removal space; and a dust collection discharge module for forcibly sucking in air inside the removal space to discharge fine dust generated during the burr removal process to the outside of the device.

[0013] In addition, the abrasive circulation module is characterized by including an abrasive transfer pipe through which abrasive is transferred from the abrasive storage section, a transfer pressure section that supplies power for transferring the abrasive to the abrasive transfer pipe, and a filter section disposed on the path through which the abrasive is transferred to filter out burrs or foreign substances.

[0014] In addition, it is characterized by further including an air injection module that blows out fine dust by injecting compressed air onto the surface of the rotating plastic injection molded product through one or more air nozzles disposed inside the removal space.

[0015] In addition, the rotary drum module is characterized by comprising a first drum section having a large diameter and provided on the side where the injection molded product is fed, and a second drum section connected to the rear side of the first drum section, having a small diameter and extending upwardly while curving upwardly so as to be concave toward the upper rear.

[0016] In addition, the rotary drum module is characterized by further including a plurality of guides that are formed protruding from the surfaces of the first drum portion and the second drum portion and are extended so as to be inclined toward the rear center.

[0017] In addition, it is characterized by further including an antistatic agent injection module that sprays an antistatic agent into the removal space to suppress static electricity generated by friction between the plastic injection molded product and the abrasive.

[0018] In addition, the above antistatic agent injection module is characterized by including an antistatic agent storage unit for storing an antistatic agent and an injection pipe connecting the antistatic agent storage unit and the removal space.

[0019] In addition, the dust collection and discharge module is characterized by including a discharge duct connecting the removal space and the outside of the device, and a blower connected to the discharge duct to forcibly draw in air.

[0020] A method for integrated processing of burr removal, antistatic treatment, and drying of a plastic injection molded product according to an embodiment of the present invention comprises: (a) a burr removal step of introducing a plastic injection molded product and an abrasive into a rotating drum module and rotating the rotating drum module to remove the burr; (b) a dust removal step of spraying an antistatic agent into the rotating drum module to suppress the generation of static electricity and discharging fine dust generated outside the device while performing the burr removal step; (c) a product discharge step of discharging only the plastic injection molded product outside the device after the burr removal step is completed; and (d) an abrasive recovery step of recovering the abrasive remaining in the rotating drum module to an abrasive storage unit through a discharge hole at the bottom of the rotating drum module after the product discharge step is completed. Effects of the invention

[0022] The present invention, devised to solve the problems of the aforementioned prior art, provides the following excellent and remarkable effects.

[0023] First, burrs on thermosetting plastics can be precisely removed without damaging the product. Rather than a simple impact method, this invention continuously mixes and circulates the plastic injection molded part with a special abrasive (e.g., plastic granules) within a rotary drum module. This provides optimal grinding conditions that effectively crush and remove hard, brittle burrs with weaker bonding forces by selectively impacting and frictioning them, without damaging the thermosetting plastic body. The guide maximizes this mixing efficiency to ensure uniform quality.

[0024] Second, the highest quality injection molded products can be obtained by fundamentally preventing product contamination caused by static electricity and fine dust. This invention is equipped with a dual prevention system to solve the problems of 'crushed dust' and 'static electricity,' which were the biggest issues of conventional technology. First, an antistatic agent injection module continuously sprays an antistatic agent during the burr removal process, effectively suppressing and neutralizing the static electricity generated by the friction between the plastic and the abrasive. At the same time, an air injection module and a dust collection discharge module generate a powerful airflow inside the drum, immediately sucking in fine dust that has been crushed and is suspended in the air, and forcibly discharging it to the outside of the device. Through this dual action, product contamination is completely blocked, and a finished product can be obtained immediately without the need for a separate secondary cleaning process.

[0025] Third, the separation and recovery process of the product and abrasive is clear and efficient. In this invention, after the burr removal is completed, the step of first discharging the 'product (plastic injection molded product)' and the step of subsequently recovering only the 'abrasive' remaining inside the drum through the discharge port at the bottom of the drum are clearly separated. This replaces the complex and inefficient process of sorting mixed contents by pouring them out all at once, thereby making the sorting of the finished product very easy, maximizing the recovery rate of the abrasive to reduce costs, and preventing the finished product from being unnecessarily mixed with burr residue or abrasive, thus providing the effect of improving the final quality.

[0026] Fourth, by processing products in bulk, investment time and process time are reduced. The present invention is a process that handles these processes collectively in a single cycle rather than performing them separately. As deburring, antistatic treatment, and drying are performed, excellent effects can be obtained, such as automated one-click control (time, pressure, spray volume, RPM control + sensor feedback) resulting from reduced process time, improved productivity (reduced processing time compared to manual work, mass processing possible), quality stability (management of surface resistance target values, reduction of defect rate), improved working environment (suppression of static electricity and reduction of dust dispersion), and cost reduction including labor costs. Brief explanation of the drawing

[0028] FIG. 1 is a front view of a burr removal device according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of a burr removal device according to an embodiment of the present invention. FIG. 3 is a side cross-sectional view of a burr removal device according to an embodiment of the present invention. FIG. 4 is a flowchart illustrating a burr removal step of a burr removal device according to an embodiment of the present invention, Specific details for implementing the invention

[0029] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described in detail below together with the accompanying drawings.

[0030] However, the technical concept of the present invention is not limited to some of the described embodiments but can be implemented in various different forms, and within the scope of the technical concept of the present invention, one or more of the components among the embodiments may be selectively combined or substituted.

[0031] In addition, terms used in the embodiments of the present invention (including technical and scientific terms) may be interpreted in a sense that is generally understood by those skilled in the art to which the present invention belongs, unless explicitly and specifically defined otherwise. Terms that are commonly used, such as terms defined in advance, may be interpreted in consideration of their meaning in the context of the relevant technology.

[0032] Furthermore, the terms used in the embodiments of the present invention are for the purpose of describing the embodiments and are not intended to limit the present invention.

[0033] In this specification, the singular form may include the plural form unless specifically stated otherwise in the text, and when described as "at least one of A and B and C (or more than one)," it may include one or more of all combinations that can be formed from A, B, and C.

[0034] In addition, terms such as first, second, A, B, (a), (b), etc., may be used when describing the components of the embodiments of the present invention. These terms are used merely to distinguish the components from other components and are not intended to limit the essence, order, or sequence of the components.

[0035] And, where it is stated that a component is 'connected', 'combined', or 'connected' to another component, this may include not only cases where the component is directly 'connected', 'combined', or 'connected' to the other component, but also cases where it is 'connected', 'combined', or 'connected' due to another component located between the component and the other component.

[0036] Furthermore, when described as being formed or placed "above" or "below" each component, "above" or "below" includes not only cases where two components are in direct contact with each other, but also cases where one or more other components are formed or placed between the two components. Additionally, when expressed as "above" or "below," it may include the meaning of a downward direction as well as an upward direction relative to a single component.

[0037] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. FIG. 1 is a front view of a burr removal device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of a burr removal device according to an embodiment of the present invention, and FIG. 3 is a side cross-sectional view of a burr removal device according to an embodiment of the present invention. Below, an integrated processing device for burr removal, antistatic, and drying of a bulk plastic injection molded product having an automatic abrasive circulation and separation recovery function is defined as the 'integrated processing device for burr removal, antistatic, and drying of a bulk plastic injection molded product,' and in the drawings, P may mean a plastic injection molded product, A may mean an abrasive, and B may mean an antistatic agent.

[0038] Referring to FIGS. 1 to 3, the integrated processing device (100) for burr removal, antistatic and drying of a bulk plastic injection molded product according to an embodiment of the present invention is a device for removing burrs (flash) generated in a thermosetting plastic injection molded product using an abrasive. The integrated processing device (100) for burr removal, antistatic and drying of a bulk plastic injection molded product may be configured to include a main body (110) that forms the exterior of the device and provides a workspace inside, a rotating drum module (200) that is rotatably installed inside the main body (110) to mix and frictionally mix the plastic injection molded product with an abrasive, an air injection module (300) that sprays air to increase burr removal efficiency, an antistatic agent injection module (400) that suppresses static electricity generation due to friction, an abrasive circulation module (500) that recovers and resupplies the used abrasive, and a dust collection and discharge module (600) that discharges fine dust generated during the operation to the outside.

[0039] The main body (110) forms the overall exterior of the device and provides an internal removal space (170) in which a rotary drum module (200) is installed. A first door (120), a second door (130), and an operating unit (140) may be arranged in the main body (110).

[0040] The first door (120) is provided on the upper front side of the main body (110) and may be a door that selectively opens and closes the removal space (170) to allow a worker to feed a plastic injection molded product to be removed into a rotating drum module (200) inside the removal space (170) or to discharge an injection molded product from which burr removal has been completed.

[0041] The second door (130) is provided on the lower front side of the main body (110) and may be a door that is opened and closed to allow a user to access the abrasive storage section (510) of the abrasive circulation module (500) located at the bottom to replenish or maintain the abrasive.

[0042] The control unit (140) is provided on one side of the main body (110) and may include a switch and a controller for controlling the operation, stop, timer setting, etc. of each component module (200), 300, 400, 500, 600) of the device.

[0043] The rotary drum module (200) can be formed to be horizontal or have a predetermined incline in the removal space (170) inside the main body (110) and can be rotatably positioned. The plastic injection molded product and the abrasive introduced into the removal space (170) by the rotary drum module (200) are mixed together and tumbled by rotation, causing mutual friction to perform the core task of removing burrs from the plastic injection molded product.

[0044] The rotary drum module (200) may include a first drum section (210) and a second drum section (220).

[0045] The rotary drum module (200) may be composed of regions in which at least a portion has a different diameter. The rotational region of the rotary drum module (200) may be formed in the form of a conveyor belt and arranged to rotate. The rotary drum module (200) may include a first drum section (210) and a second drum section (220). For example, the first drum section (210), which is the inlet side where the injection molded material is fed in and discharged, may be formed with a large diameter, and the second drum section (220), which is the end side, may be formed with a small diameter and extended with a curvature. This difference in shape induces the injection molded material and the abrasive to be efficiently mixed and frictionally rubbed when the drum rotates. The first drum section (210) may be arranged in the form of a roller extending horizontally in the lower front region of the rotary drum module (200). In this case, the conveyor of the first drum section (210) may be rotated by a first rotation axis (250) with a large diameter. As the lower part of the removal space (170) is prevented from being exposed forward by the first drum section (210), the plastic injection molding may not be discharged forward during the process of removing burrs from the removal space (170). That is, the first drum section (210) can act as a dam or dike for the removal space (170). Meanwhile, the removal of burrs from the plastic injection molding is achieved by mutual friction and collision that occur as the plastic injection molding and the abrasive tumble together within the removal space (170) according to the rotation of the rotating drum module (200), and does not depend on the distance between the plastic injection molding and the rotating drum module (200). At this time, the abrasive is supplied from the abrasive storage unit (510) through the lower side of the removal space (170), that is, the area where the first drum unit (210) is placed (see arrow A in FIG. 3), and the spraying from the upper side of the removal space (170) through the air nozzle (330) and the input pipe (420) of the air supply pipe (320) (see arrow B in FIG. 3) is not for polishing the plastic injection molded product, but for removing crushed fine dust, drying moisture by an antistatic agent, and suppressing static electricity.Therefore, the spray from the air supply pipe (320) and the input pipe (420) does not conflict with the supply direction and abrasive action of the abrasive.

[0046] delete

[0047] The second drum section (220) can be positioned such that its front end is located at the rear of the first drum section (210) and its rear end is located at the upper rear of the removal space (170), so that the rear end area is positioned at a higher position than the front end. Additionally, the second drum section (220) can be positioned with a curved shape so that its upper surface has a downwardly concave shape. Accordingly, the lower surface area of ​​the removal space (170) can be formed with a curve, and as the first drum section (210) and the second drum section (220) rotate backward, the plastic injection molding material and abrasive continuously move from the upper surface of the second drum section (220) to the upper rear of the removal space (170) and then fall back down, repeating this motion, thereby removing the burr and preventing the plastic injection molding material from escaping to the outside. The second drum section (220) is positioned at the rear end on a second rotating shaft (260) having a smaller diameter than the first rotating shaft (250) and can be rotated by the second rotating shaft (260).

[0048] A plurality of discharge holes (230) and guides (240) may be arranged in the rotary drum module (200). A plurality of discharge holes (230) may be arranged on the surface of the rotary drum module (200) at set intervals from each other. In this case, the size of the discharge holes (230) may be set such that finished plastic injection molded products cannot pass through, but only burr residue and abrasive granules pass through and fall into the abrasive storage section (510) at the bottom.

[0049] A guide (240) may be a means of being placed on the surface of a rotating drum module (200) to guide the injection molded material and abrasive so that, when rotated, they do not simply slide but instead gather toward the center of the removal space (170) or mix up and down. The guide (240) may be extended so as to be inclined from the outer side of the rotating drum module (200) toward the inner side, from the first drum section (210) toward the second drum section (220), and may be positioned to protrude at a set height from the surface of the rotating drum module (200). Accordingly, when the rotating drum module (200) rotates, the plastic injection molded material, abrasive granules, and burrs or foreign substances may be continuously moved toward the upper center of the removal space (170), thereby enabling continuous burr removal and simultaneously transporting the burrs or foreign substances toward the direction of the dust collection discharge module (600) to be described later, thereby inducing easy discharge.

[0050] The abrasive circulation module (500) can perform the function of circulating the abrasive (e.g., polycarbonate or nylon granules) used in burr removal operations by transferring it from the bottom of the device to the top for reuse, or storing the abrasive for disposal along with the burrs and recovering the abrasive and burrs. The abrasive circulation module (500) may include an abrasive storage section (510), an abrasive transfer pipe (520), a transfer pressure section (530), and a filter section (540). Specifically, the abrasive in powder form stored in the abrasive storage unit (510) is sucked in by the air flow generated in the transfer pressure unit (530), pneumatically transferred along the abrasive transfer pipe (520) through the filter unit (540) and supplied into the removal space (170), and after being used for burr removal within the removal space (170), it can be circulated by falling back into the abrasive storage unit (510) through the discharge port (230) of the rotary drum module (200) and being recovered.

[0051] The abrasive storage section (510) may be positioned at the bottom of the main body (110), that is, below the rotating drum module (200). The abrasive storage section (510) may be positioned at the bottom of the removal space (170). The abrasive storage section (510) may be in the shape of a hopper to provide a space in which abrasives are stored inside, or in which falling abrasives or burrs can be recovered.

[0052] The abrasive transfer pipe (520) is a means for providing a flow path for abrasives to be transferred from the abrasive storage section (510) to the removal space (170). The abrasive transfer pipe (520) may be extended such that one end is placed in the abrasive storage section (510) and the other end is placed in the filter section (540), thereby providing a flow path for abrasives to be transferred from the abrasive storage section (510) toward the filter section (540).

[0053] The transfer pressure unit (530) is a means for providing pressure for transferring abrasives by being connected to the abrasive transfer pipe (520). For example, the transfer pressure unit (530) may include an air blower or an air pump. Abrasives from the abrasive storage unit (510) can be sucked in by a strong air flow generated from the transfer pressure unit (530) and flow into one end of the abrasive transfer pipe (520), and abrasives can be introduced into the removal space (170) of the rotating drum module (200) by being sprayed in the direction of the filter unit (540) along the extension direction of the abrasive transfer pipe (520). That is, the transfer pressure unit (530) is a means for pneumatically transferring abrasives.

[0054] The filter section (540) is a filter that is positioned on the path where the abrasive is sprayed from the transfer pipe (520) toward the removal space (170) of the rotating drum module (200) to filter out burr debris or foreign matter larger than the abrasive. The filter section (540) may be extended horizontally to have a length equal to the horizontal extension length of the first drum section (210). The area where the filter section (540) is positioned may be the lower side of the first drum section (210). Additionally, the filter section (540) may, if necessary, prevent plastic injection molded material discharged beyond the first drum section (210) of the rotating drum module (200) from moving backward to the abrasive storage section (510).

[0055] The air injection module (300) is a means capable of strongly injecting air into the removal space. The air injection module (300) may include an air pump (310) that generates compressed air, an air supply pipe (320) in which one end extends to the air pump (310) and the other end is positioned inside the removal space (170), and at least a portion of the horizontally extending area is positioned in the removal space (170), and a plurality of nozzles (330) positioned at set intervals along the extension direction of the air supply pipe (320) positioned in the removal space (170). In this case, the compressed air generated from the air pump (310) can be transported through the air supply pipe (320) with a high flow rate in the path, and can inject air onto the surface of a rotating plastic injection molded product through the air nozzles (330) positioned inside the removal space (170) within the air supply pipe (320). The air nozzle (330) can spray air onto the surface of the rotating injection molded product through the air nozzle (330) positioned inside the removal space (170). This serves not only to shake off crushed fine dust from the product surface but also to dry moisture caused by antistatic agents, etc.

[0056] The antistatic agent injection module (400) serves to prevent static electricity from being generated during the burr removal process. The antistatic agent injection module (400) may include an antistatic agent storage unit (410) in which the antistatic agent is stored, and an injection pipe (420) in which one end is connected to the antistatic agent storage unit (410) and the other end is connected to the main body (110) to communicate with the inside of the removal space (170) for the antistatic agent to be injected. Through this, the antistatic agent stored in the antistatic agent storage unit (410) can be sprayed into the inside of the removal space (170), preferably into the rotating drum module (200), through the injection pipe (420). If necessary, the injection pipe (420) can spray the antistatic agent into the removal space (170) in the form of a mist. This neutralizes static electricity generated by friction between the thermosetting plastic and the abrasive, thereby preventing fine dust from reattaching to the product surface.

[0057] The dust collection discharge module (600) is positioned on the upper surface of the main body (110) and is a means for discharging fine dust, burr residue, and antistatic agent mist generated inside the removal space (170) to the outside of the device. The dust collection discharge module (170) may include a discharge duct (610) with one end connected to the upper surface of the main body (110) and the other end connected to the outside, and a blower (620) connected to the discharge duct (610) to provide power for external discharge. Accordingly, the blower (620) is continuously operated during the burr removal process, thereby continuously forcibly sucking in air inside the removal space (170) during the operation, so that fine dust, burr residue, and antistatic agent mist floating in the air can be discharged to the outside of the device through the discharge duct (610).

[0058] Below, the operating mechanism of the integrated processing device (100) for removing burrs, antistatic treatment, and drying of a bulk plastic injection molded product according to an embodiment of the present invention is described. FIG. 4 is a flowchart illustrating the burr removal step of the burr removal device according to an embodiment of the present invention.

[0059] Referring to FIG. 4, the integrated processing device (100) for burr removal, antistatic and drying of a bulk plastic injection molded product according to an embodiment of the present invention can automatically remove burrs from a thermosetting plastic injection molded product by operating in the following steps according to the control of the user's operating unit (140).

[0060] First, in the preparation and insertion stage, the user opens the first door (120) of the main body (110), inserts a number of plastic injection molded products with burrs not removed into a rotating drum module (200) placed in the removal space (170) inside the main body (100), and then closes the door.

[0061] In the burr removal operation step, when the user starts the operation through the control unit (140), the burr removal process proceeds automatically for a time set by a timer. First, the rotary drum module (200) operation step can be performed. The first rotation axis (250) and the second rotation axis (250) of the rotary drum module (200) can rotate in the same direction. Accordingly, the first drum section (210) and the second drum section (220) can move at a set speed so that their upper surfaces move from the front to the rear of the removal space.

[0062] After this, an abrasive supply step may be performed. In this case, as the abrasive circulation module (500) is operated, the abrasive stored in the lower abrasive storage section (510) can be continuously supplied into the rotary drum module (200) by means of the transfer pressure section (530), through the transfer pipe (520) and the filter section (540). During this process, the abrasive can be supplied while moving from the front to the rear of the first drum section of the rotary drum module (200).

[0063] In the friction and crushing stage, the burrs on the plastic injection molding can be removed as the plastic injection molding and abrasive move up to the rear upper side of the removal space (170) and then fall back down again, as the plastic injection molding and abrasive move within the removal space (170) according to the rotation of the rotating drum module (200). In this case, the mixing and movement of the plastic injection molding and abrasive can be carried out more efficiently by the guide (240).

[0064] At the same time, the antistatic agent injection step, the air injection step, and the dust collection step can be performed simultaneously.

[0065] In the antistatic agent injection step, the antistatic agent injection module (400) operates to spray the antistatic agent into the removal space (170), thereby suppressing the generation of static electricity caused by friction.

[0066] Additionally, in the air injection step, the air injection module (300) can inject compressed air through the air nozzle (330) to assist in causing the crushed fine dust to fall off the surface of the plastic injection molded product.

[0067] Afterwards, in the dust collection stage, the dust collection discharge module (600) can continuously draw in air inside the removal space (170) through the discharge duct (610) to forcibly discharge floating fine dust and burr residue to the outside of the device.

[0068] The abrasive used in the polishing process and the crushed burr residue can fall back into the lower abrasive storage section (510) by gravity through the discharge hole (230) placed on the surface of the rotary drum module (200). Afterward, the abrasive that has passed through the filter section (540) can be immediately circulated to the second stage, and if necessary, the abrasive can be replaced and used.

[0069] Afterward, once the set time has elapsed and the burr removal is complete, the device can be switched to the product discharge stage. In this stage, the operation of the abrasive circulation module (500) is stopped first so that the abrasive is no longer supplied into the drum, and the rotating drum module (200) is rotated or tilted in a specific direction (e.g., reverse direction) so that only the plastic injection molded product from which the remaining burr has been removed is left in the removal space (170). Additionally, during this process, abrasive particles smaller than the plastic injection molded product fall through the discharge hole (230) and are not discharged to the outside along with the plastic injection molded product.

[0070] Finally, after the recovery of the plastic injection molded product is completed in the residual abrasive recovery step, the rotary drum module (200) may perform a rotational operation in the forward or reverse direction for a certain period of time to recover the residual abrasive remaining in the rotary drum module (200) to the abrasive storage unit (510). In particular, residual abrasives remaining in the second drum unit (220), the guide (240), or the gap may fall completely into the lower abrasive storage unit (510) through the discharge hole (230) and be recovered. Once the abrasive recovery is complete, the operation of all component modules of the device, including the rotary drum module (200), is stopped, and a standby state for the next operation can be maintained.

[0072] The present invention has been described above with reference to preferred embodiments. Those skilled in the art will understand that the present invention may be embodied in modified forms without departing from the essential characteristics of the invention. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the invention is defined by the claims, not by the foregoing description, and all variations within the scope of the claims should be interpreted as being included in the invention. Explanation of the symbols

[0074] 100: Integrated processing unit 110: Main body 120: Door 1 130: Door 2 140 : Control panel 170 : Removal space 200: Rotary drum module 210: First drum section 220: 2nd drum section 230: Discharge port 240 : Guide 250 : First rotation axis 260: Second rotation axis 300: Air injection module 310: Air pump 320: Air supply pipe 330 : Air nozzle 400 : Antistatic agent injection module 410: Antistatic agent storage section 420: Injection pipe 500: Abrasive circulation module 510: Abrasive storage unit 520: Abrasive transfer pipe 530: Transfer pressure section 540 : Filter unit 600 : Dust collection and discharge module 610: Exhaust duct 620: Blower

Claims

Claim 1 A main body providing a removal space into which a plastic injection molded product is introduced to remove burrs; a rotating drum module rotatably installed within the removal space and having a plurality of discharge holes formed on its surface, which causes the plastic injection molded product and the abrasive to repeatedly move to the rearward and upper side and then fall upon rotation so that burrs are removed by mutual friction between the plastic injection molded product and the abrasive; an abrasive storage unit disposed below the rotating drum module, in which the abrasive supplied to the removal space is stored and the abrasive falling through the discharge holes is recovered; an abrasive circulation module providing power to supply the abrasive from the abrasive storage unit to the removal space; an air injection module that sprays compressed air onto the surface of the rotating plastic injection molded product through one or more air nozzles disposed within the removal space to shake off crushed fine dust and simultaneously dry moisture with an antistatic agent; and an antistatic agent injection module that sprays an antistatic agent into the removal space to suppress static electricity generated by friction between the plastic injection molded product and the abrasive. The device comprises a dust collection and discharge module that forcibly sucks in air inside the removal space to discharge fine dust generated during the burr removal process to the outside of the device; wherein the abrasive circulation module comprises an abrasive transfer pipe that provides a flow path for transferring abrasive from the abrasive storage unit to the removal space, a transfer pressure unit that supplies power for transferring abrasive to the abrasive transfer pipe, and a filter unit disposed on the path through which the abrasive is transferred to filter out burr residue or foreign substances, and wherein the abrasive from the abrasive storage unit is supplied into the removal space along the abrasive transfer pipe and through the filter unit by means of an air flow generated by the transfer pressure unit. Claim 2 delete Claim 3 delete Claim 4 An integrated processing device for burr removal, antistatic treatment, and drying of a bulk plastic injection molded product according to claim 1, wherein the rotary drum module comprises a first drum portion having a large diameter and provided on the side where the injection molded product is fed, and a second drum portion connected to the rear side of the first drum portion having a small diameter and extending while curving upwardly so as to be concave toward the upper rear. Claim 5 An integrated processing apparatus for burr removal, antistatic treatment, and drying of a bulk plastic injection molded product, wherein, in claim 4, the rotary drum module further comprises a plurality of guides formed protruding from the surfaces of the first drum portion and the second drum portion and extended so as to be inclined toward the rear center. Claim 6 delete Claim 7 An integrated processing apparatus for burr removal, antistatic treatment, and drying of a bulk plastic injection molded product, wherein, in claim 1, the antistatic agent injection module comprises an antistatic agent storage unit for storing an antistatic agent and an injection pipe connecting the antistatic agent storage unit and the removal space. Claim 8 An integrated processing device for burr removal, antistatic treatment, and drying of bulk plastic injection molded products according to claim 1, wherein the dust collection and discharge module comprises a discharge duct connecting the removal space and the outside of the device and a blower connected to the discharge duct for forced air intake. Claim 9 An integrated processing device for burr removal, antistatic treatment, and drying of a bulk plastic injection molded product according to claim 1, further comprising an operating unit for controlling the operation of the device, wherein the operating unit controls the sequential execution of a product discharge step in which only the plastic injection molded product is discharged to the outside after the burr removal is completed, and an abrasive recovery step in which the abrasive remaining in the rotary drum module is recovered to the abrasive storage unit through the discharge hole after the product discharge step is completed. Claim 10 (a) a burr removal step in which a plastic injection molded product and an abrasive are introduced into a rotating drum module, and the burr is removed by mutual friction while the plastic injection molded product and the abrasive are repeatedly moved upward and then dropped by rotating the rotating drum module; (b) a dust removal step in which, while performing the burr removal step, an antistatic agent is sprayed into the rotating drum module to suppress the generation of static electricity, and compressed air is sprayed onto the surface of the rotating plastic injection molded product through an air nozzle to shake off crushed fine dust while simultaneously drying the moisture caused by the antistatic agent and discharging the generated fine dust to the outside of the device; (c) a product discharge step in which only the plastic injection molded product is discharged to the outside of the device after the burr removal step is completed; and (d) an abrasive recovery step in which, after the product discharge step is completed, the abrasive remaining in the rotating drum module is recovered to an abrasive storage unit through a discharge hole at the bottom of the rotating drum module; characterized by sequentially including the above steps.

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