Air vent assembly comprising plurality of parts and injection molding apparatus comprising same

Abstract

An air vent assembly is disclosed. The air vent assembly comprises: a first part including a plurality of protrusion portions; a plurality of slits into which each of the plurality of protrusion portions is inserted; and a second part made of metal, integrally formed, and including an accommodation groove in which the first part is accommodated, wherein each of the plurality of slits includes a protrusion protruding from a partition wall dividing the plurality of slits to the inside of each of the plurality of slits so as to be in contact with the plurality of protrusion portions, and the protrusion maintains a gap between the protrusion portions and the partition wall by separating one protrusion portion accommodated in one slit from the partition wall and limiting movement of the one protrusion portion in a direction perpendicular to the longitudinal direction of the slits. Other various embodiments are possible.

Description

Air vent assembly comprising multiple parts and injection molding device comprising the same

[0001] The present disclosure relates to an air vent assembly comprising a plurality of parts and an injection molding apparatus comprising the same.

[0002] Injection molding can be used to mold thermoplastic or thermosetting resins. A mold device for injection molding may include an air vent to discharge gas or gases contained in the resin placed in a cavity within the mold used for injection molding.

[0003] The above information may be provided as background art to aid in understanding the present disclosure. No claim or determination is made as to whether any of the above is applicable as prior art related to the present disclosure.

[0004] According to one embodiment, an air vent assembly may include a first part. The first part may include a plurality of protrusions. The air vent assembly may include a second part. The second part may include a plurality of slits into which each of the plurality of protrusions is inserted, and a receiving groove in which the first part is received. The second part may be formed of a metal material and may be formed integrally. Each of the slits may include a protrusion. The protrusion may protrude into each of the slits from a partition wall separating the slits and may contact the protrusions. The protrusion may separate one of the protrusions received in one of the slits in which the protrusion is disposed from the partition wall to maintain a gap between the protrusion and the partition wall. The protrusion may restrict movement of the one of the protrusions in a direction perpendicular to a longitudinal direction of the slit.

[0005] According to one embodiment, an injection molding apparatus may include a first mold and a second mold. The first mold may include a cavity configured to receive a resin. The second mold may include a core configured to pressurize the resin received in the cavity. The second mold may be configured to be movable with respect to the first mold. The injection molding apparatus may further include an air vent assembly. The air vent assembly may be coupled to a mounting portion formed on the core. The air vent assembly may be configured to transmit gas discharged from the resin according to pressurization of the resin to the outside of the second mold. The air vent assembly may include a first part. The first part may include a plurality of protrusions. The air vent assembly may include a second part. The second part may include a plurality of slits into which each of the plurality of protrusions is inserted, and a receiving groove in which the first part is received. The second part may be formed of a metal material and may be formed integrally. Each of the slits may include a protrusion. The protrusion may protrude from the partition wall separating the slits into the interior of each of the slits and may contact the protrusions. The protrusion may separate one protrusion accommodated in one slit in which the protrusion is arranged from the partition wall to maintain a gap between the protrusion and the partition wall. The protrusion may restrict movement of the one protrusion in a direction perpendicular to the longitudinal direction of the slit.

[0006] Figure 1 is a partial perspective view showing an exemplary injection molding apparatus.

[0007] Fig. 2 is a cross-sectional view showing an exemplary injection molding apparatus.

[0008] Figure 3 is a perspective view showing an exemplary air vent assembly.

[0009] FIG. 4A is a drawing showing a first part of an exemplary air vent assembly.

[0010] Figure 4b is a drawing showing a side view of an exemplary bridge of the first part.

[0011] FIG. 4c is an enlarged view of a portion of an exemplary air vent assembly according to the combination of the first part and the second part.

[0012] Figure 5 is a drawing showing a second part of an exemplary air vent assembly.

[0013] Figure 6 is a cross-sectional view of an exemplary air vent assembly in which the first part and the second part are assembled.

[0014] Figures 7a and 7b are top views illustrating an exemplary air vent assembly.

[0015] Fig. 1 is a partial perspective view illustrating an exemplary injection molding apparatus. Fig. 2 is a cross-sectional view illustrating an exemplary injection molding apparatus.

[0016] Referring to FIGS. 1 and 2, an injection molding device (100) can mold molten resin. Injection molding is a process of applying heat to powdered resin to melt it, injecting the molten resin into a mold, and then cooling it to mold a product.

[0017] An injection molding device (100) may include a first mold (101) and a second mold (102). Either the first mold (101) or the second mold (102) may be fixed, and the other may be movable. For example, the second mold (102) may be a fixed mold, and the first mold (101) may be a movable mold. The first mold (101) may move linearly toward the second mold (102). The first mold (101) and the second mold (102) face each other, and may be selectively opened or closed depending on the movement of the first mold (101).

[0018] The first mold (101) can be in contact with the second mold (102) to form a molded article. The molded article can be formed from, but is not limited to, resin or plastic. The resin or plastic, which is the molding material (R), can be introduced into the interior of the molds (101, 102) through the inlet (103) in a molten state. The molding material (R) can be pressurized by an external device and delivered to the inlet (103) through a nozzle. The molten molding material (R) introduced through the inlet (103) can reach the cavity (104). After sufficiently filling the cavity (104), the molten molding material (R) can be cooled. The molding material (R) can be cooled within the mold to form a molded article.

[0019] The injection molding apparatus (100) may further include an air vent assembly (140) fastened to the core (120) of the second mold (102). The air vent assembly (140) may be configured to discharge gas contained in the molding material (R) or air within the cavity (104) outside the mold during injection molding. The vent within the air vent assembly (140) may be connected to a vent (105) formed in the second mold (102) to discharge air within the cavity (104) or gas contained within the molding material (R) outside the second mold (102).

[0020] The air vent assembly (140) may include a vent (or gap, or air passage) extending from a surface facing the cavity (104) to a surface facing the vent (105) of the second mold (102). Through the vent, air or gas emitted from the molding material (R) within the cavity (104) may be discharged to the vent (105) of the second mold (102).

[0021] According to the above-described embodiment, the injection molding apparatus (100) includes an air vent assembly (140), thereby enabling removal of gas generated from resin injected into the mold. By removing gas or air within the mold through the air vent assembly (140), the quality of the molded product can be improved and corrosion or contamination of the mold can be reduced.

[0022] Figure 3 is a perspective view showing an exemplary air vent assembly.

[0023] Referring to FIG. 3, the air vent assembly (140) may include a first part (310) and a second part (320). The first part (310) may be mounted on a core (e.g., the core (120) of FIG. 2), and the second part (320) may be fastened to a second mold (e.g., the second mold (102) of FIG. 2). By fastening the second part (320), the air vent assembly (140) may be fixed to the second mold (102). The first part (310) may be positioned between the second part (320) and the second mold (102) (or the core (120)). The first part (310) may be fixed to the second mold (102) by the pressure of the second part (320) and the second mold (102).

[0024] The first part (310) may include a plurality of protrusions (311). The second part (320) may include a plurality of slits (321) into which the plurality of protrusions (311) are inserted. The first part (310) may be formed integrally. The first part (310) may be formed of a single metal or an alloy. The first part (310) may be formed by machining a single metal base material. For example, the protrusions (311) may be formed by machining a single metal base material through computer numerical control (CNC) machining or wire discharge. The second part (320) may further include a receiving groove in which the first part (310) is seated. The second part (320) may be formed integrally. For example, the second part (320) may be formed of a single material. The second part (320) may be formed of a single metal or an alloy. The second part (320) can form a plurality of slits (321) and receiving grooves by processing a metal base material. For example, the plurality of slits (321) can be formed by wire discharge on the base material of the second part (320). The receiving groove in which the first part (310) is seated can be formed by CNC processing. The air vent assembly (140) formed by assembling the first part (310) and the second part (320) formed from a single material can reduce the tolerance for the outer dimensions compared to the case where the air vent is formed by stacking a plurality of plates.

[0025] The plurality of protrusions (311) inserted into the plurality of slits (321) may be formed smaller than the plurality of slits (321). The plurality of protrusions (311) may be formed to be spaced apart from the wall forming the plurality of slits (321). Through the gap (g) between the wall and the plurality of protrusions (311), the gas in the molding material (R) may be discharged to the outside of the second mold (e.g., the second mold (102) of FIG. 1).

[0026] According to the above-described embodiment, the air vent assembly (140) may further include a structure for forming a gap (g) between a wall forming a plurality of protrusions (311) and a plurality of slits (321). The structure for forming the gap (g) for the air vent is described with reference to FIGS. 4A to 6.

[0027] FIG. 4A is a drawing illustrating a first part of an exemplary air vent assembly. FIG. 4B is a drawing illustrating a side view of an exemplary bridge of the first part. FIG. 4C is an enlarged drawing of a portion of the exemplary air vent assembly according to the combination of the first part and the second part.

[0028] Referring to FIG. 4A, the first part (310) may include a base (401), a plurality of protrusions (311), and a plurality of bridges (410). The first part (310) may be a structure that is left over after being processed from a single base material. For example, the first part (310) may include a plurality of protrusions (311), bridges (410), and a base (401) that are integrally formed from a single material.

[0029] The base (401) can be inserted into a receiving groove (e.g., receiving groove (550) of FIG. 5) formed in the second part (320). When the base (401) is fastened to the mold, it can come into contact with the mold. For example, the base (401) can be seated in a seating portion formed in the core (120) of the second mold (e.g., the second mold (102) of FIG. 1).

[0030] A plurality of protrusions (311) may protrude from the base (401). The plurality of protrusions (311) may be referred to as a plate or flat member in that they are formed in a thin plate shape with a thickness relative to the protrusion length. The thickness of the protrusions (311) may be formed narrower than the width of the slits (321). The difference between the thickness of the protrusions (311) and the width of the slits (321) may be approximately 0.01 mm to 0.025 mm. The difference between the thickness of the protrusions (311) and the width of the slits (321) may be determined in consideration of the discharge of air and the inflow of resin into the slits (321). If the difference between the thickness of the protrusions (311) and the width of the slits (321) is large, the discharge of gas within the molding material (R) is easy, but the molding material (R) may be introduced into the slits (321). The molding material (R) introduced into the slits (321) may increase the defect rate of the molded product or deteriorate the quality of the molded product. If the difference between the thickness of the protrusions (311) and the width of the slits (321) is small, it may be difficult for the gas in the molding material (R) to escape. If the gas escape of the molding material (R) becomes difficult, discoloration of the molded product may occur, or defects due to residual gas or appearance defects due to the generation of bubbles may occur. The gap between the protrusions (311) and the wall forming the slits (321) (e.g., the gap (g) in FIG. 3) functions as an air vent, and therefore, in order to reduce the defects, the width of the gap (g) may be configured to be formed to be 0.005 mm to 0.015 mm. For example, if the width of each of the slits (321) is 1 mm, the thickness of each of the protrusions (311) may be 0.98 mm to provide an air vent having a width of 0.01 mm. The protrusions (311) may be spaced apart from each other. When the first part (310) and the second part (320) are assembled, a wall forming the slits (321) may be inserted into the gap between the protrusions (311).

[0031] The sets of bridges (411, 412) can connect the protrusions (311). The sets of bridges (411, 412) can be the remaining portion after removing the protrusions (311) from the parent material to connect the protrusions (311). The sets of bridges (411, 412) can be at least a portion of the area left after removing the protrusions (311) to form the space (450). One end of each of the protrusions (311) can be connected to a bridge forming the first set of bridges (411), and the other end of each of the protrusions (311) can be connected to a bridge forming the second set of bridges (412). The sets of bridges (411, 412) can form a continuous surface with the base (401). A base (401) and sets of bridges (411, 412) can define a space (450). The edges of the space (450) can be surrounded by the base (401) and sets of bridges (411, 412). As another example, the base (401) can include a set of bridges (411). The base (401) can include an opening forming the space (450) within the base (401), and the protrusions (311) can be supported on a portion of the base (401) extending in a direction perpendicular to the longitudinal direction of the protrusions (311).

[0032] The space (450) between the first set of bridges (411) and the second set of bridges (412) may be continuous with the gap (g) of the air vent assembly (140). The gap (g) may be the distance between the walls forming the protrusions (311) and the slits (321).

[0033] The sets (411, 412) of the plurality of bridges may include a structure for providing gas or gases introduced into the gap (g) to the space (450). For example, each of the bridges of the first set of bridges (411) and the second set of bridges (412) may include a groove (410a) dug along an edge that contacts the plurality of protrusions (311). The groove (410a) may lead to the space (450). Each of the bridges of the first set of bridges (411) and the second set of bridges (412) may be connected to an end of the plurality of protrusions (311). Each of the bridges of the first set of bridges (411) and the second set of bridges (412) may include a groove (410a) extending along an edge contacting the protrusions (311) and a surface (410b) supporting a wall of the second part (320). The groove (410a) may be formed into a semicircular shape. The groove (410a) may be formed through wire electrical discharge machining.

[0034] Referring to Fig. 4b, the groove (410a) is not limited to a semicircular shape and may include other shapes. The groove (410a) may have an arc shape at the boundary portion where it comes into contact with the protrusion (311), and the groove (410a) may have an arc shape corresponding to the arc shape at the boundary portion with the surface (410b). If the groove (410a) is formed narrowly between the protrusion (311) and the surface (410b) as shown in Fig. 4a, it may be formed in a semicircular shape. If the gap between the protrusion (311) where the groove (410a) is formed and the surface (410b) is formed relatively wide as shown in Fig. 4b, it may have a groove shape with a rounded edge. For example, the width of the groove (410a) of Fig. 4b may be wider than the diameter of the circle being rounded. The shapes of the groove (410a) and the surface (410b) are not limited thereto. The shape of the groove (410a) can be formed to limit interference between the wall between the slits (321) of the second part (320) arranged on the surface (410b) and the protrusion (311). The shape of the groove (410a) can be formed to connect to a gap for a vent between the protrusion (311) and the slits (321).

[0035] Referring back to FIG. 4A, the base (401) of the first part (310) may have a shape corresponding to the receiving groove (e.g., the receiving groove (550) of FIG. 5) of the second part (320) in order to be inserted into the receiving groove. For example, each corner (481, 482, 483, 484) of the base (401) of the first part (310) may be chamfered in order to be inserted into the receiving groove. However, the present invention is not limited thereto, and the shape of each corner (481, 482, 483, 484) of the base (401) may be determined according to the shape of the receiving groove (550). For example, if the shape of the corners of the receiving home (550) is rounded, each corner (481, 482, 483, 484) of the base (401) can be rounded.

[0036] The first part (310) may include a protruding shape dug from the side surface of the base (401). It may include a convex portion (402) and a concave portion (403) dug from the side surface of the base (401). The convex portions (402) and the concave portions (403) may be repeatedly arranged along the side surface of the base (401). When the first part (310) and the second part (320) are assembled, the convex portion (402) may be configured to contact the receiving groove (550), and the concave portion (403) may be spaced apart from the receiving groove (550). The base (401) including the concave portion (403) may be configured to transfer gas flowing in from the gap (g) to the vent (105) of the second mold (102). The concave portion (403) may be connected to the gap (g). For example, the space between the concave portion (403) and the receiving groove (550) may extend along the side of the base (401) and be connected to a groove (410a) formed in the sets of bridges (411, 412). The space between the concave portion (403) and the receiving groove (550) may be connected to the gap (g) formed by assembling the first part (310) and the second part (320) through the groove (410a). During the injection molding process, gas emitted from the molding material (R) may be transmitted to the vent (105) of the second mold (102) through the gap (g), the groove (410a), and the space between the concave portion (403) and the receiving groove (550).

[0037] Referring to FIG. 4C, the convex portion (402) may be formed at an end of the protrusion (311), and the concave portion (403) may be formed at an end of the bridges (410). At least a portion of the protrusion (311) may be spaced apart from the slit (321) to provide a vent (V). The length of the protrusion (311) may be formed relatively longer than the length of the bridge (412). For example, the protrusion (311) on which the convex portion (402) is formed may be formed longer than the bridges (410) on which the concave portion (403) is formed. By forming the protrusion (311) to be long (e.g., the convex portion (402) is formed on the protrusion (311), the air vent assembly (e.g., the air vent assembly (140) of FIG. 1) can secure a relatively wide vent (V) space.

[0038] The home (410a) may be connected to the vent (V) and connected to the concave portion (403) and the space (450) to transmit volatile gas or vapor transmitted through the vent (V) to the outside of the mold.

[0039] Referring back to FIG. 4A, the first part (310) may further include a hole (490) penetrating the base (401). An external object may be inserted into the hole (490). The external object may be a bolt. The hole (490) may have a threaded line formed on the inner surface thereof corresponding to the threaded line of the bolt. The bolt may be inserted along the threaded line formed on the inner surface of the hole (490) to pressurize the second part (320). As the bolt protrudes toward the second part (320) after penetrating the hole (490), it may pressurize one surface of the second part (320). The first part (310) may be moved away from the second part (320) by a distance equal to the protruding distance of the bolt. The first part (310) can be separated from the second part (320) by a nut protruding through the hole (490).

[0040] The space (450) formed in the base (401) may correspond to the shape of the seating portion formed in the core (120) of the second mold (102). The height of the air vent assembly (140) coupled to the seating portion where the vent (105) is formed without penetrating the entire second mold (102) may be low. If the length of the ventilation portion is long, it may be difficult to discharge the gas. In order to prevent the molding material (R) from flowing into the gap (g), if the length of the narrow gap (g) of approximately 0.005 mm to 0.015 mm is long, the resistance during the flow of air or gas may increase. The air vent assembly (140) with a low height can reduce the length of the ventilation portion through which the gas passes, so that the air in the cavity (104) or the gas in the molding material (R) can be easily discharged. For example, if the height of the air vent assembly (140) is 10 mm, the length of the ventilation portion can be configured to be 10 mm. The air vent assembly (140), which is a structure that is mounted on the second mold (102), can have a shorter length of the ventilation portion than the air vent that penetrates the second mold (102).

[0041] Figure 5 is a drawing showing a second part of an exemplary air vent assembly.

[0042] Referring to FIG. 5, the second part (320) may include a plurality of slits (321) and a partition wall (521).

[0043] A plurality of protrusions (311) may be inserted into each of the plurality of slits (321). The plurality of protrusions (311) may be spaced apart from the partition walls (521) forming the plurality of slits (321). The gap (g) between the plurality of protrusions (311) and the partition walls (521) may function as an air vent. The plurality of slits (321) may extend in a direction parallel to each other. The plurality of slits (321) may be spaced apart from each other. The partition walls (521) may be arranged between the plurality of slits (321). The partition walls (521) may be formed in a connected form rather than being separated. The partition walls (521) may be a remaining area after forming the slits (321) formed through wire discharge in the second part (320).

[0044] The second part (320) may further include protrusions (501, 502). The protrusions (501, 502) may be configured to maintain a gap (g) between the protrusions (311) and the partition wall (521). The protrusions (501, 502) may protrude from the partition wall (521) by 0.005 mm to 0.015 mm. For example, each of the protrusions (501, 502) may have a protrusion length of 0.01 mm. The length of the protrusions (501, 502) may determine the width of the gap (g). For example, the width of the gap (g) may be 0.005 mm to 0.015 mm, which is the protrusion length of the protrusions (501, 502). The protrusions (501, 502) may be spaced apart in the extension direction of the partition wall (521) (or in the longitudinal direction of the slit (321)). For example, the protrusions (501, 502) may be spaced apart by 2 mm to 4 mm in the extension direction of the partition wall (521). The spaced apart space may be connected to a gap (g). The protrusions (501, 502) may space one protrusion inserted into one slit from the partition wall. For example, the protrusions (501, 502) may protrude from the partition wall (521) into each of the slits (321). The protrusions (501, 502) may come into contact with the protrusions (311) when the first part (310) and the second part (320) are assembled. For example, the first protrusions (501) protruding from the partition wall (521) forming one side of one of the slits (321) can contact one side of one of the protrusions inserted into the one slit. The second protrusions (502) protruding from the partition wall (521) forming the other side of one of the slits (321) can contact the other side of one of the protrusions inserted into the one slit. The protrusions (311) arranged between the first protrusions (501) and the second protrusions (502) can be fixed inside the respective slits (321). The movement of the protrusions (311) in a direction perpendicular to the longitudinal direction of the protrusions (311) (or the longitudinal direction of the slit (321)) can be restricted.

[0045] The air vent assembly (140) can maintain the width of the gap (g) at a constant level by restricting the movement of the protrusions (311). The gap (g) maintained at a constant level can facilitate the discharge of gas discharged from the molding material (R) and gas within the cavity (104), and can restrict the inflow of the molding material (R) into the gap (g), thereby improving the quality of the molded product.

[0046] The second part (320) may include side walls (511, 512, 513, 514) extending to the back surface of the second part (320) and a receiving groove (550). The side walls (511, 512, 513, 514) may form a side surface of the second part (320). Since the side surface of the air vent assembly (140) in which the first part (310) and the second part (320) are assembled is identical to the side surface of the second part (320), the side walls (511, 512, 513, 514) may form a side surface of the air vent assembly (140).

[0047] The receiving groove (550) may be defined by side walls (511, 512, 513, 514). For example, the receiving groove (550) may be surrounded by the side walls (511, 512, 513, 514). The shape of the receiving groove (550) may correspond to the shape of the base (401) of the first part (310). The receiving groove (550) may provide a space in which the base (401) may be received. The receiving groove (550) may have a shape corresponding to the shapes of the corners (481, 482, 483, 484) of the base (401).

[0048] The second part (320) may further include fastening grooves (581, 582, 583, 584). The fastening grooves (581, 582, 583, 584) may be formed on the back surface of the second part (320). The fastening grooves (581, 582, 583, 584) may be structured to be fastened to a second mold (e.g., the second mold (102) of FIG. 1). The second mold (102) and the second part (320) may be coupled via screws inserted into the fastening grooves (581, 582, 583, 584). The fastening grooves (581, 582, 583, 584) may include screw lines. Although the second mold (102) and the second part (320) have been described as being screw-joined, this is merely exemplary and is not limited thereto. For example, the second mold (102) and the second part (320) may be joined through screw-joints, fit-joints, hook-joints, or other mechanical joints.

[0049] The side walls (511, 512, 513, 514) may have a chamfered shape in the area where each of the side walls (511, 512, 513, 514) meets (e.g., the corner area of ​​the second part (320)) to provide an area for forming fastening grooves (581, 582, 583, 584). The chamfered shape may be a shape corresponding to the corners (481, 482, 483, 484) of the first part (310). The corners (481, 482, 483, 484) of the first part (310) may be chamfered to provide a space for the fastening grooves (581, 582, 583, 584).

[0050] The second part (320) according to the above-described embodiment can facilitate gas discharge of the air vent assembly (140). The protrusions (501, 502) of the second part (320) can fix the protrusions (311) and limit the movement of the protrusions (311), thereby maintaining the width of the gap (g) constant. The gap (g) maintained constant can discharge the gas discharged from the molding material (R) and the gas within the cavity (104) to the outside of the second mold (102). By maintaining the gap (g) formed narrowly, the air vent assembly (140) can limit the inflow of the molding material (R) into the interior, thereby improving the quality of the molded product.

[0051] Figure 6 is a cross-sectional view of an exemplary air vent assembly in which the first part and the second part are assembled.

[0052] The air vent assembly (140) can maintain a constant gap (g). Each of the protrusions (311) of the first part (310) of the air vent assembly (140) can be arranged in the slits (321) of the second part (320). Each of the protrusions (311) arranged in the slits (321) can be fixed by protrusions (501, 502) protruding from the bulkhead (521). The protrusions (501, 502) can fix the protrusions (311) by pressing a portion of both sides of the protrusions (311).

[0053] When the air vent assembly (140) is attached to a second mold (e.g., the second mold (102) of FIG. 1) and the molding material (R) is introduced into the cavity (e.g., the cavity (104) of FIG. 2), the protrusions (311) can be forced in the injection direction of the molding material (R) (e.g., to the right) by the injection of the molding material (R). The protrusions (501, 502) can prevent the width of the gap (g) from changing due to the pushing of the protrusions (311). The bridges (410) can support the partition walls (521). The partition walls (521) can be seated on the surfaces (401b) of the bridges (410). The semicircular grooves (410a, 410b) formed in the bridges (410) can be connected to the gap (g), and the gas introduced into the gap (g) through the gap (g) can be transmitted to the outside of the first part (310). For example, the gas emitted from the molding material (R) can be transmitted to the groove (550) of the first part (310) through the gap (g), and the gas transmitted to the groove (550) can be discharged to the outside of the second mold (102) through the vent (105) of the second mold (102).

[0054] According to the above-described embodiment, the air vent assembly (140) can maintain the width of the gap (g) at a constant level through the protrusions (501, 502). The gas emitted from the molding material (R) and the gas within the cavity (e.g., the cavity (104) of FIG. 2) can be discharged to the outside through the gap (g) maintained at a constant width.

[0055] Figures 7a and 7b are top views illustrating an exemplary air vent assembly.

[0056] Referring to FIG. 7a, the slits (721a, 721b) of the air vent assembly (701) can be spaced apart in a first direction by a first bulkhead (722). A second bulkhead (723) can space the slits (721a, 721b) in a second direction perpendicular to the first direction.

[0057] The first partition wall (722) may correspond to the partition wall (521) of FIG. 5. The first partition wall (722) may extend in the second direction. The second partition wall (723) may extend in the first direction to separate the slits (721a, 721b).

[0058] The second part of the air vent assembly (701) may have protrusions corresponding to the shape of the separated slits (721a, 721b).

[0059] Referring to FIG. 7B, the air vent assembly (702) may have slits (731) extending diagonally in the side wall of the first part. The slits (731) may be separated by a partition (732). The second part of the air vent assembly (702) may include protrusions extending diagonally to correspond to the shape of the slits (731).

[0060] The protrusions and slits (731) extending in a diagonal direction are inclined to the direction of movement of the resin and receive force, thereby preventing the protrusions from being pushed due to the injection pressure.

[0061] The air vent assembly (701, 702) of FIGS. 7a and 7b may include a structure similar to the shapes of the sets of bridges (411, 412), the convex portion (402) and the concave portion (403) of FIG. 4a and the protrusions (501, 502) of FIG. 5.

[0062] For example, through the grooves (410a) formed in the sets of bridges (411, 412), the gas can be transmitted to the outside of the second mold (e.g., the second mold (102) of FIG. 1) through the gap and the recess (403) of the air vent assembly (701, 702). By including the protrusions (501, 502), the pushing of the protrusions can be prevented.

[0063] In addition to the arrangement of the slits (721a, 721b, 731), the shapes of the slits can also be formed in various ways. For example, the shapes of the slits are formed in a rectangular structure, but are not limited thereto, and may be formed in a trapezoidal structure as shown in Fig. 7b. The slits may be rectangular slits with rounded corners, slits with semicircular ends, or oval slits.

[0064] According to the above-described embodiment, the air vent assembly (140; 701, 702) provides an air vent assembly formed from a single material, thereby shortening the ventilation section and enabling stable gas discharge. By shortening the height of the air vent assembly (140; 701; 702), it can be placed on a mold and stably fixed.

[0065] Above, the structure of an air vent assembly and an injection molding device including the air vent assembly has been described based on FIGS. 1 to 7b. Hereinafter, the operation of the injection molding device will be described.

[0066] Referring to FIGS. 2 and 6, the first mold (101) can move toward the second mold (102) to provide a cavity (104) for manufacturing a molded article. The cavity (104) can have a shape corresponding to the shape of the molded article. The molding material (R) can be injected into the cavity (104) through the inlet (103). The molding material (R) can be injected into the inlet (103) through a nozzle, and while the molding material (R) is injected, injection pressure can be applied within the cavity (104) formed by the core (120) and the first mold (101). Even after the molding material (R) is injected, the pressure can be maintained to form the shape of the molded article while the molding material (R) is cooled.

[0067] The injection pressure applied when the molding material (R) is introduced or after being introduced can pressurize the protrusions (311). The protrusions (501, 502) facing into the slit can reduce the displacement due to the injection pressure by fixing the protrusions (311). For example, the gap (g) between the protrusions (311) and the partition wall (521) can be maintained despite the injection pressure applied when the molding material (R) is introduced or after being introduced. The molding material (R) can cause gas inside to be discharged through the gap (g) by being pressurized. The gas to be discharged through the gap (g) can be discharged to the outside through the vent (105) of the second mold (102).

[0068] The molding material (R) within the cavity (104) of the molds (101, 102) can be cooled and formed into an injection-molded product. The air vent assembly (140) can prevent the inflow of the molding material (R) with a gap (g) maintained at a constant level, thereby improving the quality of the injection-molded product.

[0069] A method for venting gases within the resin or within the mold cavity may be required. An air vent assembly can provide a configuration that reduces the length of the vent and allows for stable venting of gases within the resin.

[0070] The technical tasks to be achieved in this document are not limited to the technical tasks mentioned above, and other technical tasks not mentioned will be clearly understood by those with ordinary knowledge in the technical field to which this document pertains.

[0071] According to the above-described embodiment, the air vent assembly (e.g., the air vent assembly (140) of FIG. 1) may include a first part (e.g., the first part (310) of FIG. 3) and a second part (e.g., the second part (320) of FIG. 3). The first part (310) may include a plurality of protrusions (311) protruding toward the second part. The second part (320) may include a plurality of slits (e.g., the plurality of slits (321) of FIG. 3) and a receiving groove (e.g., the receiving groove (550) of FIG. 5). The plurality of slits (321) may receive each of the plurality of protrusions (311). The receiving groove (550) may provide a space in which the first part (310) is placed. The second part (320) may be formed integrally and made of a metal material.

[0072] Each of the above slits (321) may include a protrusion (e.g., one of the protrusions (501, 502) of FIG. 5). The protrusion may protrude from the partition wall (521) that separates the slits (321) into the interior of each of the slits (321) and may contact the protrusions (311).

[0073] The above protrusions (501; 502) can space one protrusion accommodated in one slit in which the protrusions (501; 502) are arranged from the partition wall (521) to maintain a gap (g) between the protrusions and the partition wall (521), and can restrict movement of the one protrusion in a direction perpendicular to the longitudinal direction of the slit.

[0074] According to the above-described embodiment, the air vent assembly (140) can maintain the width of the gap (g) at a constant level through the protrusions (501, 502). The gas emitted from the molding material (R) and the gas within the cavity (e.g., the cavity (104) of FIG. 2) can be discharged to the outside through the gap (g) maintained at a constant width.

[0075] In one embodiment, the first part (310) may include a first set of bridges (411) connecting one end of the plurality of protrusions (311) and a second set of bridges (412) spaced apart from the first set of bridges (411) and connecting the other end of the plurality of protrusions (311). In one embodiment, a space between the first set of bridges (411) and the second set of bridges (412) may be continuous with the gap (g).

[0076] According to one embodiment, each of the bridges of the first set of bridges and the second set of bridges may include a groove dug along an edge that contacts the plurality of protrusions (311).

[0077] The above home can lead to the above space.

[0078] Each of the bridges of the set of first bridges (411) and the set of second bridges (412) can support the bulkhead (521).

[0079] The first part (310) may further include a concave portion (e.g., concave portion (403) of FIG. 4A). The concave portion (403) may be formed from a side surface of the base (401) and inserted into the receiving groove (550).

[0080] The concave portion (403) and the gap (g) can be connected so that the gas within the gap (g) moves between the concave portion (403) and the receiving groove (550).

[0081] Each corner of the above base (401) can be chamfered.

[0082] The second part (320) may further include side walls (511; 512; 513; 514) forming the side surfaces of the second part (320).

[0083] The second part (320) may further include fastening grooves (581, 582, 583, 584) formed at the corners of the side walls (511; 512; 513; 514) for coupling to an external device.

[0084] According to one embodiment, the first part (310) may include a hole.

[0085] According to one embodiment, the hole may be configured to separate the first part (310) from the second part (320) upon pressurization of the second part (320) by an external object inserted into the hole.

[0086] According to one embodiment, the protrusion (501; 502) may protrude from the bulkhead (521) by 0.005 mm to 0.015 mm.

[0087] According to one embodiment, another protrusion (501; 502) disposed in the slit in which the protrusion (501; 502) is disposed may be spaced apart from the protrusion (501; 502) by a first interval.

[0088] In one embodiment, the first gap may be from 2 mm to 4 mm.

[0089] According to one embodiment, the distance between a protrusion positioned within one of the slits among the plurality of protrusions (311) and a partition wall (521) forming the one slit may be 0.05 mm to 0.015 mm.

[0090] The second part (320) can be formed of one material.

[0091] The second part (320) may include a first side wall (511; 512; 513; 514) and a second side wall (511; 512; 513; 514) extending in a first direction perpendicular to the first side wall (511; 512; 513; 514) and longer than the first side wall (511; 512; 513; 514).

[0092] The above plurality of slits (321) may be parallel to the first side wall (511; 512; 513; 514) and spaced apart in the first direction.

[0093] The gas positioned in front of the second part (320) can move to the rear of the first part (310) through the gap (g).

[0094] According to one embodiment, an injection molding apparatus (e.g., an injection molding apparatus (100) of FIG. 1) may include a first mold (e.g., a first mold (101) of FIG. 1) and a second mold (e.g., a second mold (102) of FIG. 2). The first mold (101) may include a cavity (104) configured to receive a resin (R). The second mold (102) may include a core (120) configured to pressurize the resin (R) received in the cavity (104) and may be configured to be movable relative to the first mold (101). The injection molding apparatus (100) may further include an air vent assembly (e.g., an air vent assembly (140) of FIG. 1).

[0095] An air vent assembly (e.g., the air vent assembly (140) of FIG. 1) may include a first part (e.g., the first part (310) of FIG. 3) and a second part (e.g., the second part (320) of FIG. 3). The first part (310) may include a plurality of protrusions (311) protruding toward the second part. The second part (320) may include a plurality of slits (e.g., the plurality of slits (321) of FIG. 3) and a receiving groove (e.g., the receiving groove (550) of FIG. 5). The plurality of slits (321) may receive each of the plurality of protrusions (311). The receiving groove (550) may provide a space in which the first part (310) is placed. The first part (310) and the second part (320) may be formed integrally and may be made of a metal material.

[0096] According to the above-described embodiment, the air vent assembly (140) provides an air vent assembly formed from a single material, thereby shortening the ventilation section and enabling stable gas discharge. By shortening the height of the air vent assembly (140), it can be placed on a mold and stably fixed.

[0097] Each of the above slits (321) may include a protrusion (e.g., one of the protrusions (501, 502) of FIG. 5). The protrusion may protrude from the partition wall (521) that separates the slits (321) into the interior of each of the slits (321) and may contact the protrusions (311).

[0098] The above protrusions (501; 502) can space one protrusion accommodated in one slit in which the protrusions (501; 502) are arranged from the partition wall (521) to maintain a gap (g) between the protrusions and the partition wall (521), and can restrict movement of the one protrusion in a direction perpendicular to the longitudinal direction of the slit.

[0099] According to the above-described embodiment, the injection molding apparatus (100) includes an air vent assembly (140), thereby enabling removal of gas generated from resin injected into the mold. By removing gas or air within the mold through the air vent assembly (140), the quality of the molded product can be improved and corrosion or contamination of the mold can be reduced.

[0100] In one embodiment, the first part (310) may include a first set of bridges (411) connecting one end of the plurality of protrusions (311) and a second set of bridges (412) spaced apart from the first set of bridges (411) and connecting the other end of the plurality of protrusions (311). In one embodiment, a space between the first set of bridges (411) and the second set of bridges (412) may be continuous with the gap (g).

[0101] According to one embodiment, each of the bridges of the first set of bridges and the second set of bridges may include a groove dug along an edge that contacts the plurality of protrusions (311).

[0102] The above home can lead to the above space.

[0103] The bridges of the first set of bridges (411) and the second set of bridges (412) can support the bulkhead (521).

[0104] The first part (310) may further include a base (401) inserted into the receiving groove (550) and a concave portion (403) dug from the side of the base (401).

[0105] The above gap (g) can be configured to move the gas within the gap (g) between the concave portion (403) and the receiving groove (550).

[0106] The effects that can be obtained from the present disclosure are not limited to the effects mentioned above, and other effects that are not mentioned will be clearly understood by a person having ordinary skill in the art to which the present disclosure pertains.

[0107] The various embodiments of this document and the terminology used therein are not intended to limit the technical features described in this document to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the items, unless the context clearly indicates otherwise. In this document, each of the phrases "A or B", "at least one of A and B", "at least one of A or B", "A, B, or C", "at least one of A, B, and C", and "at least one of A, B, or C" can include any one of the items listed together in the corresponding phrase among those phrases, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used merely to distinguish one component from another, and do not limit the components in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as "coupled" or "connected" to another (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0108] According to various embodiments, each component (e.g., a module or a program) of the above-described components may include one or more entities, and some of the entities may be separated and placed in other components. According to various embodiments, one or more components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (e.g., a module or a program) may be integrated into a single component. In such a case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. According to various embodiments, the operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

Claims

1. In the air vent assembly (140), A first part (310) including a plurality of protrusions (311); and A second part (320) made of a metal material formed integrally, including a plurality of slits (321) into which each of the plurality of protrusions (311) is inserted and a receiving groove (550) in which the first part (310) is received; Each of the plurality of slits (321) includes a protrusion (501; 502) that protrudes into the interior of each of the plurality of slits (321) from the partition (521) that separates the plurality of slits (321) and contacts the plurality of protrusions (311). The above protrusions (501; 502) are By spacing one protrusion accommodated in one slit away from the partition wall (521) and restricting the movement of the one protrusion in a direction perpendicular to the longitudinal direction of the slit, a gap (g) is maintained between the protrusions and the partition wall (521). Air vent assembly (140).

2. In paragraph 1, The above first part (310) is, A set of first bridges (411) connecting one end of the plurality of protrusions (311) and a set of second bridges (412) spaced apart from the set of first bridges (411) and connecting the other end of the plurality of protrusions (311), The space between the set of first bridges (411) and the set of second bridges (412) is continuous with the gap (g). Air vent assembly (140).

3. In paragraph 2, Each of the bridges of the set of first bridges and the set of second bridges includes a groove dug along an edge that contacts the plurality of protrusions (311), The above home leads to the above space, Air vent assembly (140).

4. In paragraph 2 or 3, Each of the bridges of the first set of bridges (411) and the second set of bridges (412) supports the bulkhead (521). Air vent assembly (140).

5. In any one of paragraphs 1 to 4, The above first part (310) is, It further includes a base (401) inserted into the above-mentioned receiving groove (550) and a concave portion (403) dug from the side of the base (401), The above concave portion (403) is connected to the gap (g). Air vent assembly (140).

6. In paragraph 5, Each corner of the above base (401) is chamfered, Air vent assembly (140).

7. In any one of paragraphs 1 to 6, The above second part (320) is, Side walls (511; 512; 513; 514) forming the side surfaces of the second part (320) and Further comprising a fastening groove (581, 582, 583, 584) formed in the corner area of ​​the side wall (511; 512; 513; 514) for coupling to an external device. Air vent assembly (140).

8. In any one of paragraphs 1 to 7, The above first part (310) includes a hole, The above hole is configured to separate the first part (310) from the second part (320) according to the pressure of the second part (320) by an external object inserted into the inside of the hole. Air vent assembly (140).

9. In any one of paragraphs 1 to 8, The above protrusions (501; 502) are Protruding from the above bulkhead (521) by 0.005 mm to 0.015 mm, Air vent assembly (140).

10. In any one of paragraphs 1 to 9, The above protrusions (501; 502) are The above protrusion (501; 502) is spaced apart from another protrusion (501; 502) placed in the slit by a first interval. Air vent assembly (140).

11. In paragraph 10, The above first gap is 2 mm to 4 mm, Air vent assembly (140).

12. In any one of paragraphs 1 to 11, The distance between the protrusion positioned within one of the above-mentioned plurality of slits and the partition (521) forming the one slit is 0.05mm to 0.015mm, Air vent assembly (140).

13. In any one of paragraphs 1 to 12, The above second part (320) is formed of one material. Air vent assembly (140).

14. In any one of paragraphs 1 to 13, The above second part (320) is, It comprises a first side wall (511; 512; 513; 514) and a second side wall (511; 512; 513; 514) extending in a first direction perpendicular to the first side wall (511; 512; 513; 514) and longer than the first side wall (511; 512; 513; 514). The above plurality of slits (321) are parallel to the first side wall (511; 512; 513; 514) and spaced apart in the first direction. Air vent assembly (140).

15. In clauses 1 to 14, The above gap (g) is Moving the gas located at the front of the air vent assembly to the rear of the air vent assembly; Air vent assembly (140).

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