Outlet unit for an injection molding machine

Abstract

Outlet unit (5) for an injection molding machine (1), comprising: a vent hood (20) comprising a nozzle passage opening (215) that allows a nozzle (3a) of a cylinder (3) of an injection molding machine (1) to pass through, an outlet channel (22) that extends upwards higher than the cylinder (3), and an outlet opening (234) that is connected to the outlet channel (22); and a stationary mold carrier (2) which is connected to the outlet opening (234) of the vent hood (20), wherein the stationary mold carrier (2) has a discharge opening (2b) which allows the discharge of air from the connected outlet opening (234) of the vent hood (20) to the outside via the stationary mold carrier (2), and an insertion opening (2a) into which the nozzle (3a) of the cylinder (3) is to be inserted, and the discharge opening (2b) of the stationary mold carrier (2) is separated from the insertion opening (2a) of the stationary mold carrier (2).

Description

BACKGROUND OF THE INVENTION Area of ​​the invention

[0001] The present invention relates to an outlet unit for an injection molding machine. Related technology

[0002] Traditionally, an injection molding machine is equipped with various enclosures that cover a cylinder, a nozzle, and the like. Beneath these enclosures, a venting hood is designed in the vicinity of a nozzle in such a way as to prevent the distribution of molding compound during a dispensing process (see, for example, patent specifications 1, 2).

[0003] Patent Specification 1: Unexamined Japanese patent application, JP 2013-226816 A Patent Specification 2: Unexamined Japanese patent application, JP 2002-301557 A

[0004] DE 10 2010 046 247 A1 describes an injection molding machine with a mold mounting plate having an injection opening, an injection unit having an injection nozzle, and a protective device attached to the mold mounting plate and covering the injection nozzle laterally. The protective device completely encloses the injection nozzle, leaving gaps through which ambient air can enter the protective device. The protective device is provided with an extraction opening for vapors escaping from the injection nozzle.

[0005] JP H05-269797 A describes a cover that encloses an entire cylinder assembly and is designed as a telescopic structure. The cover is freely extendable along the longitudinal direction of the cylinder assembly, and the front end of the cover is attached to the rear surface of the front plate in a mold clamping unit, and the rear end of the cover is attached to the front surface of the front plate in an injection unit.

[0006] JP S58-101023 A describes an injection cylinder that is vertically movable and mounted on a stationary plate. A nozzle at the tip of the injection cylinder is pressed under a prescribed pressure through an opening located in the center of the stationary plate into a nozzle receptacle located in the center of an upper force.

[0007] US Patent 5,961,898 A describes a molding device for translucent objects that has an up-and-down moving nozzle. A suction path and a suction device connected to the suction path are provided to draw in gas at a contact surface of a sprue bushing and its surroundings during the up-and-down movement of the nozzle. SUMMARY OF THE INVENTION

[0008] When a cylinder, nozzle, or similar component of an injection molding machine reaches a high temperature, the heated air remains in the venting hood, causing the hood's surface to reach a high temperature. Therefore, a venting hood for an injection molding machine should reduce the surface temperature while simultaneously preventing the dispersion of molding compound.

[0009] It is an object of the present invention to provide an outlet unit for an injection molding machine which is suitable for reducing the temperature of its surface while simultaneously preventing the distribution of molding compound.

[0010] This problem is solved by the outlet unit for an injection molding machine with the features disclosed in claim 1. Further embodiments are defined in the dependent claims.

[0011] (1) The present invention relates to an outlet unit for an injection molding machine (for example, an outlet unit 5 for an injection molding machine as described below).The exhaust unit for an injection molding machine comprises a vent hood (for example, a vent hood 20 to be described below) which has a nozzle passage opening (for example, a nozzle passage opening 215 to be described below) which allows a nozzle of a cylinder of an injection molding machine to pass through, an exhaust channel (for example, a second cover 22 to be described below) which extends upwards higher than the cylinder 3, and an exhaust opening (for example, an exhaust opening 234 to be described below) which is connected to the exhaust channel, and a stationary mold carrier (for example, a stationary mold carrier 2 to be described below) which is connected to the exhaust opening of the vent hood.

[0012] (2) In the outlet unit for an injection molding machine according to (1), the outlet channel of the vent hood may include a roof element (for example, a second cover 22 to be described below) configured to direct the air discharged from the side of the cylinder to the side of the stationary mold carrier.

[0013] (3) In the outlet unit for an injection molding machine according to (2) the roof element may have an inclined plane (for example, an inclined plate 221 to be described below) which is inclined upwards from the side of the cylinder as it approaches the side of the stationary mold support.

[0014] (4) In the outlet unit for an injection molding machine according to (2) or (3), the roof element may have a double structure comprising an outer lining (for example, an outer lining 220 to be described below) and an inner lining (for example, an inner lining 230 to be described below) overlapping each other, the outer lining having a heat-radiating structure and the inner lining not having a heat-radiating structure.

[0015] (5) In the discharge unit for an injection molding machine according to one of points (1) to (4), the stationary mold carrier has a discharge opening (for example, a discharge opening 2b to be described below) which allows the discharge of the air released from the connected discharge opening of the vent hood to the outside via the stationary mold carrier.

[0016] The outlet unit for an injection molding machine according to the present invention is suitable for reducing the temperature of its surface while simultaneously preventing the distribution of molding compound. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 is an oblique view showing a partial view of an injection molding machine 1 equipped with a cylinder cladding 10 and an outlet unit 5 for an injection molding machine according to the present embodiment. Fig. Figure 2 is an oblique view showing a stationary form carrier 2 viewed from one side X2. Fig. Figure 3 is a sectional view showing the outlet unit 5 for an injection molding machine. Fig. 4A is a sectional view showing a first configuration of the cylinder fairing 10. Fig. 4B is a sectional view showing a second configuration of the cylinder fairing 10. Fig. Figure 5 is an expanded oblique view of a ventilation hood 20. Fig. Figure 6 is an expanded sectional view of the ventilation hood 20, showing the structure that connects an outer panel 220 with an inner panel 230. DETAILED DESCRIPTION OF THE INVENTION

[0017] Some embodiments of the present invention are described below. All drawings accompanying this patent specification are schematic diagrams. For the sake of clarity, the shape, scale, length-to-width ratio, and the like of each element are altered or exaggerated compared to the actual ones. Hatching indicating a cross-section of an element is omitted in the drawings where appropriate. In this description and the like, terms for shapes and geometric features, and terms indicating their extent, such as "parallel," "perpendicular," and "direction," include not only the exact meaning of the terms but also areas to be understood as substantially parallel and substantially perpendicular, and an area to be understood as essentially the intended direction.

[0018] In the present description and the like, an X-direction corresponds to the direction parallel to the longitudinal direction of a cylinder 3 of the injection molding machine 1, which, along the feed / retraction direction of the cylinder 3, is the forward and backward direction. A Y-direction corresponds to the direction perpendicular to the X-direction in a top view, pointing right and left. A Z-direction corresponds to the direction perpendicular to the XY-plane and is the upward and downward direction (the vertical direction). With respect to the forward and backward direction (the X-direction), a direction X1 corresponds to the forward direction in which the cylinder 3 approaches the stationary mold carrier 2, and a direction X2 corresponds to the backward direction in which the cylinder 3 moves away from the stationary mold carrier 2.Regarding the direction to the right and left (the Y-direction), direction Y1 in the drawings corresponds to the direction to the right, and direction Y2 corresponds to the direction to the left. Regarding the direction up and down (the Z-direction), direction Z1 in the drawings corresponds to the upward direction, and direction Z2 corresponds to the downward direction. It should be noted that in this description, "(any) direction" may also be referred to as "(any) side" or "the side of (something)."

[0019] Fig. Figure 1 is an oblique view showing part of the injection molding machine 1, which is provided with the cylinder cladding 10 and the outlet unit 5 for an injection molding machine according to the present embodiment. Fig. Figure 2 is an oblique view showing the stationary mold carrier 2 viewed from side X2. Fig. Figure 3 is a sectional view showing the outlet unit 5 for an injection molding machine. Fig. 4A is a sectional view showing the first configuration of the cylinder fairing 10. Fig. 4B is a sectional view showing the second configuration of cylinder fairing 10. Both Fig. 4A as well Fig. Figure 4B shows a cross-section of the cylinder liner 10 parallel to the YZ plane, viewed from the side of the stationary mold carrier 2. Fig. Figure 5 is an expanded oblique view of the ventilation hood 20. Fig. Figure 6 is an expanded sectional view of the ventilation hood 20, showing the structure connecting the outer panel 220 with the inner panel 230.

[0020] As in Fig. As shown in Figure 1, the injection molding machine 1 is equipped with the cylinder cover 10 and the vent hood 20. Fig. Figure 1 shows the stationary mold carrier 2, the cylinder 3, and a water cooling jacket 4 as elements necessary for describing the present embodiment, among the elements comprising the injection molding machine 1. The stationary mold carrier 2 and the venting hood 20, which are in Fig. The components shown in Figure 1 are included in the outlet unit 5 for an injection molding machine according to the present embodiment. This means that the stationary mold carrier 2 is a structure that holds a stationary mold (to be described below) and partially forms the outlet unit 5 for an injection molding machine.

[0021] The stationary form support 2 is a structure that holds a stationary form (not shown). As in Fig. 2 and Fig. As shown in Figure 3, the stationary mold carrier 2 includes an insertion opening 2a into which a nozzle 3a of the cylinder 3 (to be described below) is to be inserted. As shown in Fig. As shown in Figure 2, the stationary mold carrier 2 includes two dispensing openings 2b on its rear side (side X2). Fig. As shown in Figure 3, each of the discharge openings 2b is the opening that connects the rear (side X2) with the top (side Z1) of the stationary mold carrier 2. As shown in Fig. As shown in Figure 3, the air released from an outlet opening 234 of the ventilation hood 20 (to be described below) is partially absorbed from the discharge openings 2b (as if by a Fig. The air (shown by arrow A, as shown in Figure 3) flows through the interior of the stationary mold carrier 2 and is discharged towards the top (side Z1). It should be noted that the configuration of the discharge openings 2b in the stationary mold carrier 2 allows for partial discharge of the air and that this results in a lighter stationary mold carrier 2.

[0022] A movable mold carrier (not shown) is arranged on side X1 of the stationary mold carrier 2. The movable mold carrier is a structure that holds a movable mold (not shown). A mold is formed by the stationary mold, held by the stationary mold carrier 2, and the movable mold, held by the movable mold carrier. The movable mold carrier is held movable in the X-direction (the direction X1-X2) by a mold drive device (not shown). The movable mold carrier is moved in the direction X2 and brought into close contact with the stationary mold carrier 2, and then the mold is mechanically closed, forming a cavity inside the mold. A molded part is produced by filling the cavity with the molding compound injected via the cylinder 3.

[0023] Cylinder 3 pours a molten molding compound (a resin) into the mold. Cylinder 3 is driven by an injection device (not shown) such that it is advanced and retracted along the X-direction. Cylinder 3 is driven so that it moves towards the stationary mold carrier 2 according to Fig. 1 is advanced, and the screw (not shown) arranged inside the cylinder 3 is rotated in the state in which the nozzle 3a (to be described below) is inserted into the insertion opening 2a of the stationary mold carrier 2, thereby filling the interior of the mold with a predetermined quantity of the molding compound. As in Fig. As shown in Figure 3, cylinder 3 has a nozzle 3a at its tip on side X1, which allows the molten molding compound to be fed into the mold. A heating device (not shown), configured to melt the molding compound filled into cylinder 3, is arranged on the outer circumferential side of cylinder 3.

[0024] The water cooling jacket 4 is configured to cool the base section of the cylinder 3 (on side X2). Water circulates within the water cooling jacket 4 to cool the cylinder 3. An injection device (not shown) is located on side X2 of the water cooling jacket 4. It should be noted that the injection molding machine 1 described above, the cylinder housing 10, and the vent hood 20, which will be described below, are installed on a base (not shown).

[0025] The cylinder liner 10 is a protective element that covers the circumference of the cylinder 3. The cylinder liner 10, positioned around the circumference of the cylinder 3, prevents contact with the cylinder 3, which is heated to a high temperature by the heating device. The edge portion of the cylinder liner 10 on side X1 is inserted into a nozzle passage opening 215 (to be described below) in the vent hood 20. The edge portion of the cylinder liner 10 on side X2 is connected to the water cooling jacket 4. It should be noted that the edge portion of the cylinder liner 10 on side X2 may, for example, be connected to the cylinder 3 and not to the water cooling jacket 4.

[0026] As in Fig. As shown in Figure 4A, the cylinder liner 10, which has the first configuration, is formed by an upper plate 11, a right-side plate 12, and a left-side plate 13. The cylinder liner 10, which has the first configuration, has no lower plate (on side Z2) and therefore has an inverted concave shape in a sectional view. As shown in Fig. As shown in Figure 4B, the cylinder cladding 10, which has the second configuration, is formed in an essentially tubular shape, comprised of the upper plate 11, the right-side plate 12, the left-side plate 13, and a bottom plate 14. The configuration of the cylinder cladding 10 can correspond to either the first or the second configuration described above. It should be noted that the cylinder cladding 10 can have any configuration, as long as the configuration has a function equivalent to those of the first and second configurations.

[0027] The vent hood 20 is the protective element that covers the area around the nozzle 3a (the cylinder 3) on side X1 of the cylinder housing 10. The vent hood 20, arranged around the nozzle 3a, prevents the molding compound from spreading during the dispensing process. According to the present embodiment, the vent hood 20 directs the heated air in the area around the cylinder 3 to the side of the stationary mold carrier 2, as described below, thereby preventing the air from remaining inside the vent hood 20.

[0028] As in Fig. As shown in Figure 5, the ventilation hood 20 comprises a first cover 21 and a second cover 22. The first cover 21 is the element located on the lower side (side Z2) of the ventilation hood 20. As shown in Fig. As shown in Figure 5, the first panel 21 comprises a right-side panel 211, a left-side panel 212, a connecting panel 213, and a door 214 with a window. The right-side panel 211 is the panel-like element located on the right side (side Y1) of the first panel 21. The left-side panel 212 is the panel-like element located on the left side (side Y2) of the first panel 21. The right-side panel 211 and the left-side panel 212 are connected by the connecting panel 213 at the top of the rear side (on side X2).

[0029] The first cover 21 includes the nozzle passage opening 215 on its rear side (on side X2). The nozzle passage opening 215 is an opening into which the nozzle 3a (see Fig. 3) of the cylinder 3. The first casing 21 includes a connecting frame 216 on its front side (on side X1). The connecting frame 216 is connected to the stationary mold carrier 2 (see Fig. 3) Section of the first panel 21 to be connected. The first panel 21 includes a connecting opening 217 on its upper side (on side Z1). The connecting opening 217 is an opening that is connected to a connecting opening 235 of the second panel 22 (to be described below).

[0030] The door 214 with window, which is the door located on the left-hand panel 212, is configured so that it can be opened and closed by a hinge element 214b in the directions of the arrows. The door 214 with window includes a transparent window 214a. An operator can see the area around the nozzle 3a (see Fig. 3) Visually inspect the door 214 with window through window 214a in the closed position. Note that the door 214 with window may be located on the right-hand panel 211 or on both the right-hand panel 211 and the left-hand panel 212.

[0031] As in Fig. As shown in Figure 3, the connecting frame 216 is attached to the front face of the stationary mold carrier 2 on side X2 of the first cover 21. Since the first cover 21 has the connecting frame 216 with an opening on side X1, the cylinder 3 is caused to be advanced and retracted along the X-direction when the first cover 21 is attached to the stationary mold carrier 2, thereby enabling the nozzle 3a to be inserted into and withdrawn from the insertion opening 2a of the stationary mold carrier 2.

[0032] The second fairing 22 is the exhaust port, which extends upwards (in the direction Z1) from the first fairing 21, higher than cylinder 3. The second fairing 22 acts as a roof element, directing the heated air discharged from the side of cylinder 3 to the side of the stationary mold carrier 2. As in Fig. As shown in Figure 5, the second panel 22 comprises the outer panel 220 and the inner panel 230. According to the present embodiment, the second panel 22 is constructed as a double-structured panel in which the outer panel 220 and the inner panel 230 overlap.

[0033] The outer panel 220 is the element located on the upper side (side Z1) of the second panel 22. As shown in Fig. As shown in Figure 5, the outer cladding 220 comprises an inclined plate 221, a right-side plate 222, a left-side plate 223, and a rear plate 224. The inclined plate 221 is a plate-like element located on the upper side (side Z1) of the outer cladding 220. The inclined plate 221 corresponds to the inclined plane of the outer cladding 220, which, as it approaches the side of the stationary mold support 2, is inclined upwards from the side of the cylinder 3 (towards direction Z1). As described above, the second cladding 22, which serves as a roof element, has the inclined plane, which, as it approaches the side of the stationary mold support 2, is inclined upwards from the side of the cylinder 3.

[0034] The right-side plate 222 is a plate-like element located on the right side (side Y1) of the outer cladding 220. The left-side plate 223 is a plate-like element located on the left side (side Y2) of the outer cladding 220. The rear plate 224 is a plate-like element located on the rear side (side X2) of the outer cladding 220. The outer cladding 220 is configured such that, viewed from the side from the left and right (Y-direction), it essentially has the shape of a right-angled triangle, with the inclined plate 221 corresponding to the inclined plane being inclined upwards (towards the Z1 direction) from the rear side (side X2) as one approaches the front side (side X1).

[0035] As in Fig. As shown in Figure 5, both the inclined plate 221 and the right-hand plate 222 and the left-hand plate 223 of the outer cladding 220 have several circular vents 225. Each of the vents 225 is an opening that releases air heated by the surface of the inner cladding 230 (to be described below) to the outside. This means that the outer cladding 220 has the multiple vents 225 as a heat-radiating structure. The outer cladding 220 serves to prevent contact with the inner cladding 230 (to be described below), which reaches a higher temperature compared to the surface of the outer cladding 220.

[0036] Both the right-hand plate 222 and the left-hand plate 223 of the outer cladding 220 have first connecting holes 226 at four positions ( Fig. Figure 5 shows only the first connecting holes 226 of the left-hand plate 223). Each of the first connecting holes 226 is an opening into which a screw 241 (to be described below) is to be inserted.

[0037] The inner lining 230 is an element arranged inside the outer lining 220 of the second lining 22. The inner lining 230 comprises an inclined plate 231, a right-side plate 232, and a left-side plate 233. The inclined plate 231 is a plate-like element arranged on the upper side (side Z1) of the inner lining 230. The inclined plate 231 of the inner lining 230 corresponds to an inclined plane that, when approaching the side of the stationary mold support 2, slopes upwards (towards Z1) from the side of the cylinder 3. The right-side plate 232 is the plate-like element arranged on the right side (side Y1) of the inner lining 230. The left-side plate 233 is the plate-like element arranged on the left side (side Y2) of the inner lining 230.

[0038] The inner lining 230 is configured such that, viewed from the left and right (the Y direction) in a side view, it essentially has the shape of a right-angled triangle, with the inclined plate 231 corresponding to the inclined plane being inclined upwards (towards the Z1 direction) from the rear (the X2 direction) when approaching the front (the X1 side). As shown in Fig. As shown in Figure 5, the inclined plate 231, the right-hand plate 232, and the left-hand plate 233 of the inner lining 230 do not have a heat-radiating structure such as a vent. This is because the inner lining 230 is configured to direct the air heated in the vicinity of the cylinder 3 to the side of the stationary mold carrier 2.

[0039] The inner casing 230 includes the exhaust port 234 on its front side (side X1). The exhaust port 234 is an opening that directs the air heated in the vicinity of the cylinder 3 to the discharge ports 2b (see Fig. 3) of the stationary mold carrier 2. In the state in which the vent hood 20 is connected to the stationary mold carrier 2, as in Fig. As shown in Figure 3, the outlet opening 234 faces forward and backward (in the X direction) towards the discharge openings 2b of the stationary mold carrier 2. The inner lining 230 has the connecting opening 235 on its lower side (side Z2). The connecting opening 235 is an opening that connects to the connecting opening 217 of the first lining 21.

[0040] Both the right-hand plate 232 and the left-hand plate 233 of the inner cladding 230 have second connecting holes 236 at four positions ( Fig. Figure 5 shows only the second connecting holes 236 of the left-hand plate 233). Each of the second connecting holes 236 is an opening through which the screw 241 (to be described below) protrudes. When the outer cover 220 is placed on the inner cover 230, the second connecting holes 236 are arranged in positions that allow them to interlock with the first connecting holes 226 of the outer cover 220.

[0041] As in Fig. As shown in Figure 6, the outer panel 220 and the inner panel 230 are placed one on top of the other, and a spacer 244 is positioned between them. The screw 241 with an attached washer 242 is inserted into the connecting bore 226 and the connecting bore 236 and secured with a nut 243, thus connecting the outer panel 220 and the inner panel 230. A long nut (not shown) can be used instead of the spacer 244. In this case, short screws (one screw being a counter-rotating screw) can be inserted and tightened from both the outer panel 220 and inner panel 230 sides, with the long nut positioned between the panels.

[0042] As in Fig. As shown in Figure 6, in the state where the outer panel 220 and the inner panel 230 are connected, a predetermined free space t is formed between the outer panel 220 and the inner panel 230. The air heated by the surface of the inner panel 230 flows out of the free space t formed between the panels through the vent openings 225 of the outer panel 220, thereby being released to the outside. The second panel 22 is installed at the connecting opening 217 of the first panel 21 in the state where the outer panel 220 and the inner panel 230 are placed one on top of the other. The second panel 22 is connected to the outer edge of the connecting opening 217, for example, by means of screws.

[0043] In the outlet unit 5 configured as described above for an injection molding machine according to the present embodiment, the air heated in the vicinity of the cylinder 3 is directed from the cylinder housing 10 to the vent hood 20, flows through the first housing 21 of the vent hood 20, and is directed to the second housing 22. Part of the air is directed from the second housing 22 to the side of the stationary mold carrier 2 and into the discharge openings 2b of the stationary mold carrier 2. As described in Fig. As shown in Figure 3, the air introduced into the discharge openings 2b of the stationary mold carrier 2 flows through the interior of the stationary mold carrier 2 and is discharged to the upper side (to side Z1).

[0044] The exhaust unit 5 described above for an injection molding machine according to the present embodiment achieves, for example, the following results. In the exhaust unit 5 for an injection molding machine according to the present embodiment, the venting hood 20 comprises the first cover 21 and the second cover 22, which cover the upper side (side Z1), the right side (side Y1), and the left side (side Y2), thereby effectively preventing the outward distribution of the molding compound that escapes during the exhaust process. The air heated in the vicinity of the cylinder 3 is directed from the second cover 22 to the side of the stationary mold carrier 2, thus preventing the air from remaining inside the venting hood 20.Therefore, most of the heat from the heated air is absorbed by the stationary mold support 2, which has a high heat capacity, thus keeping the surface temperature of the vent hood 20 low. Accordingly, the outlet unit 5 for an injection molding machine according to the present embodiment enables a reduction in the surface temperature of the vent hood 20 while simultaneously preventing the distribution of molding compound.

[0045] In the outlet unit 5 for an injection molding machine according to the present embodiment, the stationary mold carrier 2 comprises the discharge openings 2b, which establish a connection from the rear (side X2) to the outside (side Z1). This structure allows the partial discharge of the heated air directed from the second cover 22 of the vent hood 20 to the stationary mold carrier 2 via the discharge openings 2b to the outside, thereby keeping the temperature of the surface of the vent hood 20 lower compared to a structure without the discharge openings 2b.

[0046] In the outlet unit 5 for an injection molding machine according to the present embodiment, the second cover 22, which serves as the outlet channel of the venting hood 20, functions as a roof element that directs the heated air discharged from the side of the cylinder 3 to the side of the stationary mold carrier 2. This structure enables the effective channeling of the heated air discharged from the side of the cylinder 3 to the side of the stationary mold carrier 2 without the air being discharged to the surface of the venting hood 20.

[0047] In the exhaust unit 5 for an injection molding machine according to the present embodiment, the second cover 22, which serves as the exhaust channel of the venting hood 20, has an inclined plane that slopes upwards from the side of the cylinder 3 as it approaches the side of the stationary mold carrier 2. This structure enables the heated air discharged from the side of the cylinder 3 to be effectively directed towards the side of the stationary mold carrier 2. In the exhaust unit 5 for an injection molding machine according to the present embodiment, the second cover 22 (the venting hood 20) has a double structure in which the outer cover 220 and the inner cover 230 overlap, and this structure effectively prevents the outward distribution of the molding compound that escapes during the exhaust process.

[0048] In the outlet unit 5 for an injection molding machine according to the present embodiment, the outer casing 220 of the second casing 22 comprises the multiple vent openings 225 as a heat-radiating structure. The outer casing 220 thus enables the release of air heated by the surface of the inner casing 230 to the outside via the vent openings 225. The inner casing 230 does not include a heat-radiating structure such as a vent opening. The inner casing 230 therefore enables the effective channeling of the majority of the air heated in the vicinity of the cylinder 3 to the side of the stationary mold carrier 2.

[0049] The embodiment of the present invention has been described so far. The present invention is not limited to the embodiment described above. Various modifications and alterations, such as those described below, are available and are also included in the technical scope of the present invention. The results described in connection with the embodiments have been presented merely as the most desirable results obtained by the present invention. The results obtained by the present invention are not limited to those described in connection with the embodiments. It should be noted that, notwithstanding the fact that the embodiments described above and the modifications described below can be combined and used in a suitable manner, detailed descriptions of such combinations are omitted. (Modifications)

[0050] In the present embodiment, the number of discharge openings 2b can be one, three, or more, and there is no limitation to two. The stationary mold support 2 can be designed without a discharge opening 2b. Such a configuration also makes it possible to keep the temperature of the surface of the venting hood 20 low. In the present embodiment, the second cover 22, which acts as a roof element, can, for example, be formed in a shape comprising part of a circle, a four-sided shape, or the like; there is no limitation to a linearly inclined plane. This means that the second cover 22 can be formed in any shape, as long as the second cover 22 is suitable for directing the air discharged from the side of the cylinder 3 to the side of the stationary mold support 2.

[0051] In the present embodiment, each of the vent openings 225 of the outer cladding 220 can, for example, have an elliptical shape, a square shape, a triangular shape, a trapezoidal shape, or a polygonal shape; there is no restriction to a circular shape. Each of the vent openings 225 can have a slot shape; there is no restriction on the shape of an opening. The vent openings 225 can be arranged regularly, as shown in Fig.5 shown, or they may be arranged randomly. Furthermore, the shapes, sizes, number, etc., of the vent openings 225 of the inclined plate 221, the right-hand plate 222, and the left-hand plate 223 of the outer cladding 220 may be identical or different. It should be noted that the heat-radiating structure is not limited to the structure having the multiple vent openings 225 and may partially be a structure having a thinner section as a recess. EXPLANATION OF THE REFERENCE SYMBOLS

[0052] 1: Spraying machine, 2: Stationary mold carrier, 2b: Dispensing opening, 3: Cylinder, 3a: Nozzle, 4: Water cooling jacket, 5: Outlet unit for a spraying machine, 10: Cylinder cover, 20: Vent hood, 21: First cover, 22: Second cover, 215: Nozzle passage opening, 220: Outer cover, 221: Inclined plate, 225: Vent opening, 230: Inner cover, 234: Outlet opening

Claims

[1] Outlet unit (5) for an injection molding machine (1) comprising: a vent hood (20) comprising a nozzle passage opening (215) that allows a nozzle (3a) of a cylinder (3) of an injection molding machine (1) to pass through, an outlet channel (22) that extends upwards higher than the cylinder (3), and an outlet opening (234) that is connected to the outlet channel (22); and a stationary mold carrier (2) which is connected to the outlet opening (234) of the vent hood (20), wherein the stationary mold carrier (2) has a discharge opening (2b) which allows the discharge of air from the connected outlet opening (234) of the vent hood (20) to the outside via the stationary mold carrier (2), and an insertion opening (2a) into which the nozzle (3a) of the cylinder (3) is to be inserted, and the discharge opening (2b) of the stationary mold carrier (2) is separated from the insertion opening (2a) of the stationary mold carrier (2). [2] Outlet unit (5) for an injection molding machine according to claim 1, wherein the outlet channel (22) of the vent hood (20) comprises a roof element (22) configured to direct air discharged from the cylinder (3) to the stationary mold carrier (2). [3] Outlet unit (5) for an injection molding machine according to claim 2, wherein the roof element (22) has an inclined plane (221) which is inclined upwards from the side of the cylinder (3) when approaching the side of the stationary mold carrier (2). [4] Outlet unit (5) for an injection molding machine according to claim 2 or 3, wherein the roof element (22) has a double structure comprising an outer lining (220) and an inner lining (230) which overlap each other, and the outer lining has a heat-radiating structure and the inner lining does not have a heat-radiating structure.

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