Injection molding machine

Abstract

The present invention relates to a technology for appropriately and easily controlling the flow of raw materials. The present invention provides an injection molding machine comprising: a mounting part having an input passage for guiding raw material coming from a hopper to an input hole of a barrel; wherein the mounting part includes an opening / closing device for opening / closing the input passage; and wherein a control device controls the operation of the opening / closing device so as to allow or block the input of the raw material toward the input hole. According to the present invention, there is an advantage in that the consistency of process quality can be ensured and operational efficiency improved by reducing dependency on workers.

Description

Technology Field

[0001] The present invention relates to an injection molding machine. Background Technology

[0002] An injection molding machine is equipment used to obtain a molded product by injecting molten raw material into a cavity of the product shape within a mold.

[0003] An injection molding machine includes a mold clamping device and an injection device.

[0004] The molding device forms a cavity having the shape of a molded product to allow the molded product to be molded, or opens the cavity so that the molded product can be withdrawn.

[0005] An injection molding device is configured to melt raw materials and inject them into a cavity through a nozzle so that the molding of a product can take place.

[0006] The injection molding device plays an important role in maintaining the stability of the molding process and ensuring the quality of the molded product by stably supplying raw materials to the mold clamping device.

[0007] FIG. 1 is a reference diagram illustrating a conventional injection molding device.

[0008] Referring to FIG. 1, the injection device (10) may include a barrel (11), a hopper (12), and a mounting part (13).

[0009] The barrel (11) provides a passageway for particulate resin coming from the hopper (12) to move toward the cavity (not shown) as it melts.

[0010] The hopper (12) is configured to store and supply particulate resin, which is the raw material.

[0011] The hopper (12) receives particulate resin supplied from the outside and then supplies it to the barrel (11).

[0012] The mounting part (13) is configured to allow the hopper (12) to be mounted.

[0013] Refer further to FIG. 2 regarding the mounting part (13).

[0014] FIG. 2 is a schematic diagram illustrating a conventional mounting part (13).

[0015] Referring to FIG. 2, the mounting portion (13) includes a main body (13a) and a hopper plate (13b).

[0016] A hopper (12) is positioned above the main body (13a).

[0017] A barrel (not shown) is placed below the main body (13a).

[0018] One side of the main body (13a) is provided with an input channel (IP) through which particulate resin from the hopper (12) can be fed into the barrel.

[0019] The hopper plate (13b) is movably coupled along the upper surface of the main body (13a).

[0020] A hopper (12) can be mounted on the hopper plate (13b).

[0021] The hopper plate (13b) is provided with a passage hole (PH) through which particulate resin from the hopper can pass.

[0022] When the hopper plate (13b) is positioned at the input location where the input channel (IP) is placed, the raw material can be fed into the barrel by passing through the hopper (12), the through hole (PH), and the input channel (IP) of the main body (13a).

[0023] When the hopper plate (13b) moves from the input position to the other side, the passage hole (PH) of the hopper plate (13b) is closed by the upper surface of the main body (13a), and the flow of raw material moving from the hopper (12) to the barrel side is stopped.

[0024] That is, the mounting part (13) of the prior art exemplified in FIG. 2 has a structure in which the feeding of raw materials into the barrel side can be allowed or stopped depending on the moving position of the hopper plate (13b).

[0025] However, the mounting part (13) according to the prior art adopts a manual operation method in which an operator must directly move the hopper plate (13b) to allow or block the flow of raw materials moving from the hopper (12) to the barrel side. This had the following problems.

[0026] First, whenever the flow of raw materials needed to be controlled due to raw material replacement work, equipment maintenance work, etc., there was the inconvenience of the worker having to directly approach and operate the mounting part (13) to move the hopper plate (13b).

[0027] Second, when a worker approaches the mounting part (13), if surrounding equipment such as a barrel is at a high temperature or in operation, it is difficult to rule out the possibility of a safety accident.

[0028] Third, the accuracy of setting the movement position of the hopper plate (13b) could vary depending on the operator's skill level. If the alignment of the through hole (PH) and the input channel (IP) of the hopper plate (13b) is misaligned, the amount of raw material input may decrease or the raw material may partially leak, which may lead to a deterioration in molding quality, contamination of surrounding equipment, or safety accidents.

[0029] Fourth, when an abnormal condition occurs during the molding process, a worker must directly access the system to cut off the supply of raw materials, making a rapid response difficult and raising concerns about reduced process stability. Prior art literature

[0030] Korean Patent Publication No. 10-2020-0041072 The problem to be solved

[0031] Technology capable of properly and easily controlling the flow of raw materials is required. means of solving the problem

[0032] An injection molding machine (IMM) according to one embodiment of the present invention for achieving the purpose comprises: an injection device (200) for injecting raw material into a cavity formed by a mold; and a control device (300) for controlling the injection device; wherein the injection device (200) comprises: a barrel (220) having a transfer hollow (220-TC) that functions as a passage through which the raw material can be transferred, and an input hole (220-TH) formed therein through which the raw material can be fed into the transfer hollow (220-TC); and a mounting part (250) having an input channel (251-IP) for guiding the raw material coming from a hopper (210) to the input hole (220-TH); and wherein the mounting part (250) comprises a main body (251) having the input channel (251-IP) on one side; A movable plate (252) coupled to be movable along the upper surface of the main body (251); and a switch (253) for opening and closing the input channel (251-IP); wherein the control device (300) can control the operation of the switch (253) so as to allow or block the input of the raw material toward the input hole (220-TH).

[0033] The above-mentioned switch (253) may include: a switch plate (253a) configured to be retractable to open or close the input channel (251-IP); and a retractable portion (253c) for retracting the switch plate (253a).

[0034] The above switch (253) may include a support block (253b) that supports one side of the above switch plate (253a).

[0035] The above-mentioned moving portion (253c) may include: an air cylinder (253c-AC) for moving the support block (253b) back and forth; an air supply unit (253c-AS) for supplying air of a constant pressure to the air cylinder (253c-AC); and a solenoid valve (253c-SV) for providing air supplied from the air supply unit (253c-AS) to the air cylinder (253c-AC) according to a control signal transmitted from the control device (300).

[0036] The air cylinder (253c-AC) comprises a plurality of air ports (253c-AP1, 253c-AP2) for air to be introduced or discharged; and a piston rod (253c-PR) that moves in and out by air entering or exiting from the plurality of air ports (253c-AP1, 253c-AP2); It includes, wherein the end of the piston rod (253c-PR) is coupled to the support block (253b), and when the solenoid valve (253c-SV) is operated by a control signal transmitted from the control device (300) and air is supplied to one of the plurality of air ports (253c-AP1, 253c-AP2) at air port (253c-AP1), the opening / closing plate (253a) coupled with the piston rod (253c-PR) advances and the input passage (251-IP) is closed, and when the solenoid valve (253c-SV) is operated by a control signal transmitted from the control device (300) and air is supplied to another air port (253c-AP2) among the plurality of air ports (253c-AP1, 253c-AP2), the opening / closing plate (253a) coupled with the piston rod (253c-PR) As it retracts, the above input channel (251-IP) can be opened.

[0037] The above-mentioned opening / closing device (253) is coupled to one side of the above-mentioned moving plate (252), and the above-mentioned moving plate (252) includes an upper plate (252a) on which the above-mentioned hopper (210) can be mounted; and a lower plate (252b) coupled to the lower part of the above-mentioned plate (252a), and a guide groove (252a-G) is formed in the lower part of the above-mentioned plate (252a) to a predetermined depth facing upward, and a slit space (SS) partitioned by the guide groove (252a-G) and the upper surface of the lower plate (252b) can function as a passageway through which the above-mentioned opening / closing plate (253a) can move.

[0038] The upper plate (252a) is provided with a first through hole (252a-H1) through which the raw material coming from the hopper (210) can be moved, and the lower plate (252b) is provided with a second through hole (252b-H2) formed to be in communication with the first through hole (252a-H1), and the opening / closing plate (253a) can move between the first through hole (252a-H1) and the second through hole (252b-H2) to open and close the input channel (251-IP).

[0039] The upper plate (252a) may be provided with a limiting portion (252a-L) for limiting the operating range of the opening / closing plate (253a).

[0040] The above switch (253) may include: a mounting base (253d) on which the air cylinder (253c-AC), the support block (253b), and the opening / closing plate (253a) can be installed; and a cover (253e) for covering at least a portion of the upper part of the mounting base (253d).

[0041] The above-mentioned switch (253) includes: a mounting plate (253f) on which the solenoid valve (253c-SV) and the air supply unit (253c-AS) can be installed; and a connecting member (253g) connecting the mounting plate (253f) and the mounting base (253d) so that the mounting plate (253f) is spaced apart from the mounting base (253d); and the above-mentioned switch (253) is coupled to the moving plate (252) so that it can move together with the moving plate (252) when the moving plate (252) moves.

[0042] The above control device (300) includes an input unit (310) into which a worker's command to allow or block the input of the raw material to the input hole (220-TH) can be input; and the control device (300) can control the operation of the opening / closing device (253) according to the worker's command input through the input unit (310). Effects of the invention

[0044] As explained above, according to the present invention, the following effects can be derived.

[0045] First, convenience can be ensured because operator intervention is minimized when operating the switch to control the flow of raw materials from the hopper.

[0046] Second, since the opening and closing timing of the input channel is consistently managed, process variations due to operator skill levels can be reduced.

[0047] Third, in the event of an abnormal situation, a rapid response is possible even without worker access, and the possibility of contamination of surrounding equipment due to raw material leakage and worker safety accidents can be minimized. Brief explanation of the drawing

[0049] FIG. 1 is a reference diagram illustrating an injection device applied to a conventional injection molding machine. FIG. 2 is a schematic diagram illustrating a conventionally proposed mounting part. FIG. 3 is a reference diagram for explaining an injection molding machine according to one embodiment of the present invention. FIG. 4 is a perspective view illustrating the mounting part of the injection molding machine shown in FIG. 3. FIG. 5 is a cross-sectional view illustrated to explain the mounting portion shown in FIG. 4. FIG. 6 is a reference diagram for explaining the movement of the movable plate in the mounting portion illustrated in FIG. 4. FIGS. 7a and 7b are reference diagrams for explaining the operation of the switch in the mounting portion shown in FIG. 4. Specific details for implementing the invention

[0050] Preferred embodiments according to the present invention are described with reference to the accompanying drawings, provided that for the sake of brevity, descriptions of well-known configurations are omitted or compressed as much as possible.

[0052] <사출성형기계에 관한 설명>

[0053] FIG. 3 is a reference diagram illustrating an injection molding machine according to an embodiment of the present invention, FIG. 4 is a perspective view illustrating a mounting part in the injection molding machine illustrated in FIG. 3, FIG. 5 is a cross-sectional view illustrating a mounting part illustrated in FIG. 4, and FIG. 6 is a reference diagram illustrating the movement of a movable plate in a mounting part illustrated in FIG. 4.

[0055] Referring to FIGS. 3 to 5, an injection molding machine (IMM) according to one embodiment of the present invention includes a molding device (100), an injection device (200), and a control device (300).

[0057] The molding device (100) forms a cavity (C) having the shape of a molded product to allow the molded product to be molded, or opens the cavity (C) so that the molded product can be withdrawn.

[0058] The molding device (100) adjusts the spacing between the fixed mold plate (FP) and the movable mold plate (MP) that are paired with each other, and opens and closes the molds (FM, MM) connected to each mold plate.

[0059] The molding device (100) forms a cavity (C) when the molds (FM, MM) come into contact with each other as the movable plate (MP) moves, and the mold is closed.

[0060] In the closed state, the injection device (200) injects the molten raw material, i.e., molten resin, into the cavity (C), and the resin injected into the cavity (C) solidifies to form a molded product.

[0061] Conversely, when the molds (FM, MM) are separated as the movable plate (MP) moves, the cavity (C) is opened, and the molded product formed in the cavity (C) can be withdrawn, resulting in a mold open state.

[0062] The injection device (200) is configured to inject raw material into a cavity (C) formed by a mold (FM, MM).

[0063] The injection device (200) melts the raw material so that the molded product is formed, and then injects it into the cavity (C) through the nozzle.

[0064] The injection device (200) includes a hopper (210), a barrel (220), a screw (230), an actuator (240), and a mounting part (250).

[0065] The hopper (210) receives raw materials supplied from the outside.

[0066] The hopper (210) is equipped with an outlet (210-OH) through which the raw material contained inside can be discharged.

[0067] A barrel (220) has a spray nozzle (not shown) attached to the direction where the molding device (100) is located (left side in the drawing), and an actuator (240) attached to the opposite direction (right side in the drawing).

[0068] The barrel (220) is provided in a cylindrical shape having a transfer hollow (220-TC) that functions as a passage through which resin can be transferred to the injection nozzle side.

[0069] The barrel (220) has an input hole (220-TH) formed therein through which particulate resin, which is the raw material poured into the hopper (210), can be introduced.

[0070] The screw (230) has a feed thread (not shown) formed on its outer surface and is placed in the feed hollow (220-TC) of the barrel (220).

[0071] The screw (230) rotates or moves back and forth by the actuator (240) and operates to transport and pressurize the resin.

[0072] When the screw (230) is rotated by the actuator (240), the resin is transferred to the injection nozzle side.

[0073] The screw (230) can be advanced in the direction where the molding device (100) is located by the actuator (240) or retracted in the direction to which the actuator (240) is connected. When the screw (230) is advanced, the molten resin accumulated in front of the barrel (220) is pressurized and sprayed through the spray nozzle. The molten resin sprayed through the spray nozzle fills the cavity (C) of the mold (FM, MM).

[0074] The actuator (240) is coupled to the barrel (220), but is coupled to the side opposite the injection nozzle (right side in the drawing).

[0075] The actuator (240) is configured to operate the screw (230).

[0076] The actuator (240) may include means for rotating the screw (230) and means for moving the screw (230) back and forth.

[0077] The mounting part (250) can be fitted with a hopper (210).

[0078] The mounting part (250) is provided with an input channel (250-IP) for guiding raw materials coming from the hopper (210) to the input hole (220-TH).

[0079] The mounting part (250) includes a main body (251), a moving plate (252), and a switch (253).

[0080] The main body (251) includes an installation panel (251a), a guide panel (251b), a first connecting pipe (251c), and a second connecting pipe (251d).

[0081] The installation panel (251a) is configured to be installed on the barrel (220) side.

[0082] The lower portion of the main body (251) can be joined to the barrel (220) by fastening the installation panel (251a) to the top of the barrel (220) by means of a fastening member (not shown).

[0083] The guide panel (251b) has a long length along the movement path of the moving plate (252).

[0084] A guide rail (251b-GL) is installed along the length direction on the upper surface of the guide panel (251b).

[0085] The first connecting pipe (251c) is positioned on one side of the lower part of the installation panel (251a).

[0086] More specifically, the first connecting pipe (251c) is positioned between the installation panel (251a) and the guide panel (251b), and has an input channel (251-IP) formed inside.

[0087] The second connecting pipe (251d) is positioned on the lower side of the installation panel (251a).

[0088] The second connecting pipe (251d) has a discharge channel (251-OP) formed therein for discharging raw materials coming from the hopper (210).

[0089] The movable plate (252) is equipped with a hopper (210) and is coupled to be movable along the upper surface of the main body (251).

[0090] The movable plate (252) includes an upper plate (252a) and a lower plate (252b).

[0091] A hopper (210) is mounted on the upper plate (252a).

[0092] Moving blocks (252a-MB) for moving along the guide rail (251b-GL) in the guide panel (251b) are attached to the lower part of the upper plate (252a).

[0093] The upper plate (252a) is provided with a first through hole (252a-H1) through which raw materials from the hopper (210) can be moved.

[0094] A guide groove (252a-G) is formed in the lower part of the upper plate (252a) and is recessed to a predetermined depth toward the upper side.

[0095] The opening / closing plate (253a), to be described later, moves through the slit space (SS) partitioned by the guide groove (252a-G) and the upper surface of the lower plate (252b). That is, the slit space (SS) functions as a passageway through which the opening / closing plate (253a) can move.

[0096] The lower plate (252b) is joined to the lower part of the upper plate (252a).

[0097] The lower plate (252b) is provided with a second through hole (252b-H2) formed to be in communication with the first through hole (252a-H1).

[0098] The opening / closing plate (253a) moves between the first through hole (252a-H1) and the second through hole (252b-H2) and opens / closes the input channel (251-IP).

[0099] As the opening / closing plate (253a) opens and closes the input channel (251-IP), the outlet (210-OH) of the hopper (210) is opened and closed, and the flow of raw materials can be properly controlled.

[0100] For reference, the upper plate (252a) is provided with a limiting portion (252a-L) for limiting the operating range of the opening / closing plate (253a).

[0101] The restriction portion (252a-L) is provided so that when the opening / closing plate (253a) moves between the first through hole (252a-H1) and the second through hole (252b-H2) and advances in the other direction, the movement can be restricted if the input channel (251-IP) is properly closed.

[0102] For example, the restricting portion (252a-L) may be provided in a wall shape with curvature and formed along the outer circumference of the first through hole (252a-H1), but may be positioned only on the other side. In this case, the opening / closing plate (253a) may be designed so that the shape of the other end portion is a curved shape having the same curvature as the restricting portion (252a-L), so that the input flow path (251-IP) can be closed when the opening / closing plate (253a) and the restricting portion (252a-L) come into contact with each other.

[0103] The contact structure between the restriction portion (252a-L) and the opening / closing plate (253a) minimizes wear during the process in which the opening / closing plate (253a) repeatedly comes into contact with the restriction portion (252a-L) and allows stable opening / closing performance to be maintained even during long-term use.

[0104] As another example, the restricted portion (252a-L) may be provided in the shape of a wall, but may be positioned at a predetermined distance from the first through hole (252a-H1) in the other direction. In this case, as long as the remaining portion excluding the other end portion of the opening / closing plate (253a) closes the input channel (251-IP), the shape of the other end portion may be provided in various shapes, such as a curved shape or a polygonal shape.

[0105] When the opening / closing plate (253a) closes the input channel (251-IP), the other end portion of the opening / closing plate (253a) passes through the first through hole (252a-H1) and is stopped by the restriction portion (252a-L). Since at least a portion of the opening / closing plate (253a) is supported by the lower plate (252b) while the movement of the opening / closing plate (253a) is stopped, the possibility of displacement due to vibration during the operation of the injection molding machine (IMM) can be minimized.

[0106] The movable plate (252) may be provided with a fixing pin (252-FP) for fixing the position of the movable plate (252).

[0107] The fixing pin (252-FP) fixes the position of the movable plate (252) when the first through hole (252a-H1) and the second through hole (252a-H2) are located at an input position that communicates with the input channel (251-IP), thereby allowing the position of the hopper (210) to be fixed during the operation of the injection molding machine (IMM).

[0108] The fixing pin (252-FP) may also fix the position of the movable plate (252) even when the first through hole (252a-H1) and the second through hole (252a-H2) are moved to a replacement position that communicates with the discharge channel (251-OP). In this case, as the movement of the movable plate (252) is fixed by the fixing pin (252-FP), the movement of the hopper (210) may be restricted during the discharge process for replacing raw materials within the hopper (210).

[0109] That is, the fixing pin (252-FP) prevents the position of the hopper (210) from changing due to vibration or external force during the operation of the injection molding machine (IMM), and can ensure the safety of the hopper (210) as well as the worker.

[0110] The switch (253) is configured to open and close the input path (251-IP).

[0111] The switch (253) is connected to one side of the movable plate (252).

[0112] More specifically, the switch (253) may be coupled to one side of the lower plate (252b). However, since this is one embodiment, the switch (253) may be coupled to the upper plate (252a) or to both the upper plate (252a) and the lower plate (252b).

[0113] The switch (253) includes a switch plate (253a), a support block (253b), a forward / backward section (253c), a mounting base (253d), a cover (253e), a mounting plate (253f), and a connecting member (253g), etc.

[0114] The opening / closing plate (253a) is configured to be retractable to open or close the input channel (251-IP).

[0115] The support block (253b) supports one side of the opening / closing plate (253a).

[0116] The reciprocating portion (253c) is combined with the support block (253b) to form a configuration for reciprocating the opening / closing plate (253a).

[0117] The advance / retreat portion (253c) may include an air cylinder (253c-AC), an air supply unit (253c-AS), and a solenoid valve (253c-SV), etc.

[0118] The air cylinder (253c-AC) is configured to move the support block (253b) back and forth.

[0119] The air cylinder (253c-AC) includes a plurality of air ports (253c-AP1, 253c-AP2) and a piston rod (253c-PR).

[0120] A plurality of airports (253c-AP1, 253c-AP2) include a first airport (253c-AP1) and a second airport (253c-AP2).

[0121] The first air port (253c-AP1) and the second air port (253c-AP2) are arranged to allow air to be introduced or discharged.

[0122] The piston rod (253c-PR) moves in and out by air entering and exiting the first air port (253c-AP1) and the second air port (253c-AP2).

[0123] The end of the piston rod (253c-PR) is coupled with the support block (253b), so that when the piston rod (253c-PR) moves back and forth, the support block (253b) and the opening / closing plate (253a) connected thereto move back and forth together.

[0124] The opening / closing device (253) proposed by the present invention is configured such that an air cylinder (253c-AC) moves the opening / closing plate (253a) forward and backward through a support block (253b), thereby allowing the support block (253b) to share the load applied to the opening / closing plate (253a) and preventing the opening / closing operation from becoming difficult due to the loading load of raw materials or residual pressure.

[0125] The air supply unit (253c-AS) is configured to supply air at a constant pressure to the air cylinder (253c-AC).

[0126] For example, the air supply unit (253c-AS) can be provided as an air pump.

[0127] As another example, the air supply unit (253c-AS) may be provided as an air regulator. In this case, the air supply unit (253c-AC) may receive compressed air from a separate air pump or from an air pump already installed in the process equipment where the injection molding machine (IMM) is located. The air regulator changes the supplied compressed air to a preset pressure and supplies it to the air cylinder (253c-AC) through a solenoid valve (253c-SV).

[0128] The solenoid valve (253c-SV) is configured to provide air supplied from the air supply unit (253c-AS) to the air cylinder (253c-AC) according to a control signal transmitted from the control unit (300) to be described later.

[0129] As this moving part (253c) is controlled by the control device (300), the opening and closing of the input path (251-IP) can be performed without requiring manual operation by a worker. The operation of the moving part (253c) controlled by the control device (300) will be described later.

[0130] The mounting base (253d) is provided so that an air cylinder (253c-AC), a support block (253b), and an opening / closing plate (253a) can be installed.

[0131] The other end of the mounting bracket (253b) is fixed to the movable plate (252).

[0132] The cover (253e) is configured to cover at least a portion of the upper part of the mounting bracket (253d).

[0133] More specifically, the cover (253e) covers and protects the moving area of ​​the support block (253b) and the opening / closing plate (253a) that move in and out by the operation of the air cylinder (253c-AC).

[0134] The cover (253e) protects the drive components, the support block (253b) and the opening / closing plate (253e), from external impact and can minimize the possibility of damage.

[0135] The mounting plate (253f) is provided so that the solenoid valve (253c-SV) and the air supply device (253c-AS) can be installed.

[0136] The connecting member (253g) connects the mounting plate (253f) and the mounting base (253d) so that the mounting plate (253f) is positioned spaced apart from the mounting base (253d).

[0137] The arrangement structure of the mounting bracket (253d), mounting plate (253f), and connecting bracket (253g) allows the switch (253) to move together with the moving plate (252) when the plate moves. This is illustrated in FIG. 6.

[0138] FIG. 6 illustrates a state in which the movable plate (252) is moved to a replacement position connected to the discharge channel (251-OP) of the second connecting pipe (251d). Since the switch (253) moves together with the movement of the movable plate (252), the same opening and closing conditions can be maintained regardless of the moving position of the hopper (220).

[0139] Since the switch (253), including the mounting bracket (253d), mounting plate (253f), and connecting bracket (253g), is mounted on the movable plate (252) in the form of a single module, the entire switch (253) can be assembled and replaced as a unit module. Accordingly, a quick response is possible in the event of a failure, and maintenance costs can be reduced.

[0140] Consequently, the mounting portion (250) proposed by the present invention is formed in a structure that can be fastened to the top of the barrel (220) through an installation panel (251a) provided on the main body (251), so the present invention can be applied without additional modification to the existing injection molding machine (IMM). Accordingly, universality can be ensured.

[0141] The control device (300) is configured to control the operation of the molding device (100) and the injection device (200).

[0142] However, since the technical essence of the present invention is to minimize the intervention of an operator by automatically controlling the input and blocking of raw materials coming from the hopper (210), the description of the control device (300) in the following description is limited to this.

[0143] The control device (300) controls the operation of the opener (253) so that the input of raw materials from the hopper (210) into the input hole (220-TH) of the barrel (220) is allowed or blocked.

[0144] The control device (300) may be equipped with an input section (310) into which a command from a worker to control the operation of the switch (253) can be entered.

[0145] The control device (300) controls the operation of the switch (253) in response to a command from a worker input through the input section.

[0146] For example, the input section can be provided in the form of buttons so that the operator can directly operate it.

[0147] As another example, the input section may be provided in a form that can be touched on a screen where various information, such as the operating status of each device, can be visually recognized—that is, exposed on a control panel.

[0148] When a command to open the input channel (251-IP) is input through the input section by the operator, the control device (300) operates the opening / closing device (253) to open the input channel (251-IP) so that raw materials can be fed from the hopper (210) to the input hole (220-TH) of the barrel (220).

[0149] When a command to close the input channel (251-IP) is input through the input section by the operator, the control device (300) operates the opening / closing device (253) to close the input channel (251-IP) so that raw materials are blocked from being fed from the hopper (210) to the input hole (220-TH) of the barrel (220).

[0150] When a command is input to automatically open and close the input path (251-IP) through the input section by the operator's operation under the judgment of the control device (300), the control device (300) may operate the switch (253) according to a preset automatic control flow.

[0151] As an example of a pre-set automatic control flow, when the injection molding machine (IMM) starts operating, the control device (300) can control the operation of the opening / closing plate (253a) so that the opening / closing plate (253a) can open the input path (251-IP).

[0152] As an example of a pre-set automatic control flow, when the injection molding machine (IMM) enters a non-operational state after operation is completed, the control device (300) can control the operation of the opening / closing plate (253a) so that the opening / closing plate (253a) can close the input path (251-IP).

[0153] As an example of a pre-configured automatic control flow, in the event of an abnormal situation, the control device (300) can control the operation of the switch (253) so that the operation is stopped while the switch plate (253a) closes the input path (251-IP). This enables a rapid response in the event of an abnormal situation and minimizes the possibility of contamination due to raw material leakage and safety accidents for workers.

[0154] Consequently, the present invention enables the switch (253) to be controlled remotely via a control device (300) or automatically controlled according to a preset automatic control flow, thereby minimizing manual intervention by the operator and ensuring the operator's convenience and safety. In addition, the safety and reliability of the equipment can be improved by enabling immediate cutoff of raw materials in the event of an abnormal situation.

[0156] <개폐기의 작동에 관한 설명>

[0157] FIGS. 7a and 7b are reference diagrams for explaining the operation of the switch in the mounting portion shown in FIG. 4.

[0159] FIG. 7a illustrates a case where the solenoid valve (253c-SV) is operated by a control signal transmitted from the control device (300) and air is supplied to the first air port (253c-AP1). Referring to FIG. 7a, the air filled in the other side of the air cylinder (253c-AC) is discharged through the second air port (253c-AP2) by the new air supplied to one side of the air cylinder (253c-AC) through the first air port (253c-AP1), and the piston rod (253c-PR) advances in the other direction.

[0160] As the piston rod (253c-PR) advances, the opening / closing plate (253a), which operates in conjunction with it, also advances, and the input channel (251-IP) is closed.

[0161] As the input channel (251-IP) is closed, the flow of raw material toward the barrel (not shown) is blocked. If the flow of raw material toward the barrel is blocked, unnecessary input of raw material or the falling of residual raw material during the injection molding process can be prevented.

[0162] FIG. 7b illustrates a case where the solenoid valve (253c-SV) is operated by a control signal transmitted from the control device (300) and air is supplied to the second air port (253c-AP2). Referring to FIG. 7b, the air filled in one area of ​​the air cylinder (253c-AC) is discharged through the first air port (253c-AP1) by the new air supplied to the other space within the air cylinder (253c-AC) through the second air port (253c-AP2), and the piston rod (253c-PR) is retracted in one direction.

[0163] As the piston rod (253c-PR) retracts, the opening / closing plate (253a) that operates in conjunction with it also retracts, and the input channel (251-IP) opens.

[0164] As the input channel (251-IP) opens, raw materials from the hopper (not shown) are directed toward the barrel (not shown).

[0165] Since the piston rod (253c-PR) rapidly advances or retracts due to the air supply and discharge linked to the operation of the solenoid valve (253c-SV), the opening and closing of the input channel (251-IP) can also be rapidly achieved. By controlling the opening and closing of the input channel (251-IP) so that raw materials are supplied only when necessary, waste of raw materials can be minimized.

[0167] The embodiments described above are merely preferred examples of the present invention and may have various applications. Therefore, the present invention should not be understood as being limited only to the contents described above. Instead, the scope of the present invention should be understood as the separately described claims and their equivalents. Explanation of the symbols

[0169] IMM: Injection molding machine 200 : Injection device 220 : Barrel 220-TC : Transfer Hollow 220-TH : Insertion hole 250 : Mounting part 251 : Main body 251-IP : Input Euro 252 : Moving plate 252a : Upper plate 252a-G : Guide Home 252a-H1 : 1st through hole 252a-L : Restrictive part 252b : Bottom plate 252b-H2 : Second through hole 253 : Switch 253a : Opening / closing plate 253b : Support block 253c : Advance and retreat section 253c-AC : Air cylinder 253c-AP1, 253c-AP2 : Airport 253c-PR: Piston rod 253c-AS : Air supply unit 253c-SV : Solenoid valve 253d : Stand 253e : Cover 253f : Installation plate 253g : Connecting rod 300 : Control unit 310 : Input section

Claims

Claim 1 Injection device (200) for injecting raw material into a cavity formed by a mold; and control device (300) for controlling the injection device; wherein the injection device (200) comprises, A barrel (220) having a transfer hollow (220-TC) that functions as a passage through which the above-mentioned raw material can be transferred, and an input hole (220-TH) formed therein through which the above-mentioned raw material can be fed into the transfer hollow (220-TC); and A mounting part (250) having an input channel (251-IP) for guiding the raw material coming from the hopper (210) to the input hole (220-TH); wherein the mounting part (250) is A main body (251) having the above-mentioned input channel (251-IP) on one side; A movable plate (252) movably coupled along the upper surface of the main body (251); and An injection molding machine (IMM) comprising: a switch (253) for opening and closing the above-mentioned input channel (251-IP); wherein the control device (300) controls the operation of the switch (253) so as to allow or block the input of the raw material toward the input hole (220-TH). Claim 2 In paragraph 1, the above switch (253) is, An opening / closing plate (253a) configured to be retractable to open or close the above-mentioned input channel (251-IP); and An injection molding machine (IMM) comprising: a retractable portion (253c) for retracting the above opening / closing plate (253a). Claim 3 In paragraph 2, the above switch (253) is, An injection molding machine (IMM) comprising: a support block (253b) supporting one side of the opening / closing plate (253a). Claim 4 In paragraph 3, the above-mentioned moving portion (253c) is, An air cylinder (253c-AC) for moving the support block (253b) forward and backward; An air supply unit (253c-AS) for supplying air at a constant pressure to the air cylinder (253c-AC) above; and An injection molding machine (IMM) comprising: a solenoid valve (253c-SV) for providing air supplied from the air supply unit (253c-AS) to the air cylinder (253c-AC) according to a control signal transmitted from the control unit (300). Claim 5 In paragraph 4, the air cylinder (253c-AC) is A plurality of air ports (253c-AP1, 253c-AP2) for air to be introduced or discharged; and A piston rod (253c-PR) that moves in and out by air entering and exiting from the plurality of air ports (253c-AP1, 253c-AP2); It includes, wherein the end of the piston rod (253c-PR) is coupled to the support block (253b), and when the solenoid valve (253c-SV) is operated by a control signal transmitted from the control device (300) and air is supplied to one of the plurality of air ports (253c-AP1, 253c-AP2) at air port (253c-AP1), the opening / closing plate (253a) coupled with the piston rod (253c-PR) advances and the input passage (251-IP) is closed, and when the solenoid valve (253c-SV) is operated by a control signal transmitted from the control device (300) and air is supplied to another air port (253c-AP2) among the plurality of air ports (253c-AP1, 253c-AP2), the opening / closing plate (253a) coupled with the piston rod (253c-PR) An injection molding machine (IMM) in which the above-mentioned input channel (251-IP) is opened as it retracts. Claim 6 In paragraph 2, the switch (253) is coupled to one side of the movable plate (252), and the movable plate (252) is, An upper plate (252a) on which the above-mentioned hopper (210) can be mounted; and An injection molding machine (IMM) comprising: a lower plate (252b) coupled to the lower part of the upper plate (252a); wherein a guide groove (252a-G) formed at a predetermined depth facing upward is formed at the lower part of the upper plate (252a), and a slit space (SS) partitioned by the guide groove (252a-G) and the upper surface of the lower plate (252b) functions as a passageway through which the opening / closing plate (253a) can move. Claim 7 In claim 6, the upper plate (252a) is provided with a first through hole (252a-H1) through which the raw material coming from the hopper (210) can be moved, the lower plate (252b) is provided with a second through hole (252b-H2) formed to be in communication with the first through hole (252a-H1), and the opening / closing plate (253a) moves between the first through hole (252a-H1) and the second through hole (252b-H2) to open / close the input channel (251-IP), an injection molding machine (IMM). Claim 8 In claim 7, the upper plate (252a) has a limiting portion (252a-L) for limiting the operating range of the opening / closing plate (253a); the injection molding machine (IMM) is equipped with this. Claim 9 In paragraph 4, the above switch (253) is, A mounting stand (253d) on which the above air cylinder (253c-AC), the above support block (253b), and the above opening / closing plate (253a) can be installed; and An injection molding machine (IMM) comprising: a cover (253e) for covering at least a portion of the upper part of the mounting base (253d). Claim 10 In paragraph 9, the above switch (253) is, A mounting plate (253f) on which the solenoid valve (253c-SV) and the air supply device (253c-AS) can be installed; and An injection molding machine (IMM) comprising: a connecting member (253g) connecting the mounting plate (253f) and the mounting base (253d) such that the mounting plate (253f) is positioned spaced apart from the mounting base (253d); wherein the opening / closing device (253) is coupled to the moving plate (252) so as to be moved together with the moving plate (252). Claim 11 In paragraph 5, the control device (300) is, An injection molding machine (IMM) comprising: an input unit (310) into which a worker’s command to allow or block the input of the raw material to the input hole (220-TH) can be input; and the control device (300) controls the operation of the opening / closing device (253) according to the worker’s command input through the input unit (310).

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