Pour spout for a film bag

Abstract

The invention relates to a pouring gate for a film bag, comprising a pouring channel, wherein the wall of the pouring channel is designed as a pouring nozzle in a first end region, the channel wall in a second end region being surrounded by a welding region. The welding region has two welding arms which extend in opposite directions perpendicular to the axis of the pouring channel to a respective welding arm end, in particular they extend away from the channel wall in the second end region. Each welding arm has a plurality of rib elements which are connected to the channel wall and are spaced apart from one another in the direction of the channel axis. Each rib element on the first welding side has a first peripheral region which extends between the channel wall and the welding arm end, and on the second welding side a second peripheral region which extends between the channel wall and the welding arm end. The first and second peripheral regions form first and second welding regions which converge towards the welding arm end, wherein in each welding arm between two adjacent rib elements a recess space is formed, each recess space being open on one of the two welding sides and being closed on the other of the two welding sides by a welding face.

Description

[0001] This invention relates to a casting port for a film bag, comprising a casting channel, wherein the channel wall of the casting channel in a first end region is configured as a casting nozzle; and the channel wall in a second end region is surrounded by a welding region; wherein the welding region has two welding arms extending in opposite directions perpendicular to the channel axis of the casting port to their respective welding arm ends, particularly extending away from the channel wall in the second end region; and each welding arm has a plurality of rib elements connected to the channel wall in the second end region and spaced apart from each other in the direction of the channel axis; and each rib element on the first welding side has a first peripheral region extending between the channel wall and the welding arm end, and a second peripheral region extending between the channel wall and the welding arm end on the second welding side; wherein the first and second peripheral regions form the first and second welding regions. The first and second peripheral regions, or the first and second welding regions, converge toward the welding arm end, respectively.

[0002] In one possible implementation, the peripheral area / welding area may extend at least partially in a straight line. In this case, the areas of the first and second peripheral areas that extend in a straight line form an acute angle between them.

[0003] Such a gating gate is known in the prior art, for example from publication DE 10 2017 009693 A1 from the same applicant. The gating gate is configured to be welded between two layers of film in a film bag containing, for example, food, particularly free-flowing food. Due to the converging shape of the peripheral region forming the weld area in the two weld arms, the weld area has a design that tapers from the channel axis towards the end of the weld arm; this design is also specifically referred to as boat-shaped, where the taper occurs in a plane perpendicular to the channel axis.

[0004] Welding is performed between the welding area and the respective film layers in the two welding surfaces using welding energy. Welding claws apply welding energy to the welding area from the two opposing welding surfaces through the respective film layers of the film bag.

[0005] Welding can be performed by means of heat, induction, or ultrasound, as well as other suitable welding methods.

[0006] Therefore, the welding surfaces are two opposing surfaces on the welding area. The welding surfaces are located on either side of a plane that includes the channel axis and the ends of the two welding arms. Here, the channel axis refers to the axis of the longitudinal extent of the gating channel through the gating gate.

[0007] This plane, also known as the front plane, is the plane parallel to the film layer of the film bag (especially an unfilled film bag). When viewing the film bag from the front, the observer is actually seeing the front plane.

[0008] In use, if the film bag is upright and functions as a pouring port in the upper region, the upper region is usually provided with a removable closure device, such as a cap, which is preferably fixed to or can be fixed to the pouring port and can be removed from the latter by means of a threaded connection.

[0009] In the application described, the second end region forming the weld area is the lower end region of the gating nozzle. In the prior art, and preferably in this invention, a radially projecting collar can be configured between the gating nozzle and the weld area, surrounding the channel wall. This projecting collar can serve as a stop for the cap and / or include a so-called element protection functional component, through which it can indicate whether the cap has been opened, or at least whether the latter has been moved from its initial closed position.

[0010] The rib element is preferably configured as a planar element. This can be specifically understood as an element having a thickness interval between two faces, wherein the thickness is preferably less than the cross-sectional dimensions of the two faces, which are preferably opposite each other in the thickness direction. The thickness of such a planar element can be uniform, but this is not mandatory for the present invention. The thickness may also vary locally.

[0011] The rib element forms the welding area mentioned at the beginning through its surrounding area and is parallel to the upper periphery of the film bag. In this way, once welded together, it can ensure that the film bag has multiple linear fixation and sealing along the welding area on this upper periphery.

[0012] During welding, the rib elements are subjected to impacts from forces parallel to the rib plane. To prevent the rib elements from retracting due to bulging under these forces, it is generally stipulated in the prior art that the rib elements are stabilized by a wall connecting all the rib elements, preferably arranged around the aforementioned plane or front plane. Therefore, the wall extends centered on and perpendicular to the rib element, resulting in two gaps between two adjacent rib elements, positioned on either side of the separated wall.

[0013] This type of gate is common in the market, easy to produce using preferred injection molding methods, easy to weld, and requires a small material input. However, its disadvantage is that the essentially linear weld zone may fail under excessive stress, potentially leading to leakage. While known solutions offer very large weld surfaces, particularly the height of the entire weld area (when viewed from the channel axis), these solutions clearly require a significant amount of material.

[0014] Against this backdrop, the object of the present invention is to provide a gate, as mentioned at the beginning, which is easy to produce by injection molding, particularly easy to demold, and expands the surface area available for welding with little or no increase in material input, and in particular provides sufficient stability of the available weld surface in relation to the forces acting during welding.

[0015] According to the invention, this objective is achieved in that, in each weld arm, in every case, a gap space is provided between two adjacent rib elements, and each gap space is open in one of the two weld surfaces, in particular outwardly open, and closed by the weld surface in the other of the two weld surfaces.

[0016] When viewed from the direction of channel extension, such an embodiment has at least two adjacent gaps in each welding arm, particularly below each other, especially when each welding arm has at least three rib elements arranged adjacent to each other at a certain spacing. A preferred embodiment may specify that each welding arm has exactly three rib elements, thus creating exactly two gaps in each welding arm.

[0017] Compared to the prior art described above, the stabilizing wall located at the center of the rib element is omitted. Instead, the stability of two adjacent rib elements is achieved through the welded area of ​​the latter, that is, the peripheral area of ​​the latter, which, within the channel, is at least substantially above each other and connected by a welded surface. This extends the welded surface between the welded areas of the two rib elements surrounding the empty space, expanding the overall surface area available for welding in addition to its stabilizing function. Compared to the linear connections of the past, this allows for greater load-bearing capacity while ensuring the stability of the rib elements.

[0018] The main advantage of this invention is that, compared with the prior art, the entire welding surface is enlarged, preferably without the need to use more, or at least less, plastic material during the injection molding process to achieve this purpose.

[0019] According to an embodiment of the invention, structurally, the existing wall, starting from the center between the previous welded areas, undergoes partial displacement in the direction toward the first weld side and partial displacement in the direction toward the second weld side, with the subsequently displaced wall region forming a weld surface in each case. Thus, the weld surface is preferably formed by the proportion of material occupied by the wall in the prior art.

[0020] In a preferred embodiment, each welding arm may be specified to have at least one empty space, particularly exactly one single empty space that is open on the first welding side and closed on the second welding side.

[0021] Preferably, this forms an embodiment in which the welding area on the first welding side is not entirely identical to the welding area on the second welding side, representing a substantial difference compared to the prior art. In this preferred embodiment, at least one welding surface, preferably one that exactly closes the empty space on the first side, is preferably arranged in height (when viewed along the extension direction of the channel) offset relative to at least one, preferably exactly a single welding surface, on the other welding surface. Similarly, such offset also arises in the case of at least one open empty space on the welding side, particularly in such a way that the empty space is open outwards. In subsequent applications, such openings are covered by a thin film layer fixed to the welding area around the opening.

[0022] This implementation also ensures active demolding capability during the injection molding process, because the molding protrusions on the injection mold that define the empty space can move in a direction perpendicular to the aforementioned frontal plane when the injection mold is opened and closed.

[0023] The present invention can specify that two welding arms, in their respective geometries, particularly the open and closed gap spaces arranged opposite each other, are configured to be the same or identical on one and the same welding side, and particularly different only on different welding sides.

[0024] Independent of the number of rib elements and the gaps formed between them, the present invention preferably specifies that adjacent gaps in the channel axis direction, especially gaps adjacent to each other, are alternately closed or opened toward the first and second welding sides.

[0025] Therefore, when viewed through a first section perpendicular to the distance between the two ends of the weld arm, the weld surface of the rib element and the closed gap space preferably has a meandering profile. The section perpendicular to the distance between the ends of the weld arm is preferably spaced from the channel axis, specifically outside the casting channel. Overall, this forms a very stable structure with an enlarged weld surface.

[0026] The welding surface, which encloses the gap between rib elements on one or the other welding side, is configured as follows: the welding surface points outward, thereby contacting the thin film layer to be welded and aligning with the peripheral area of ​​the rib element forming the welding zone. Therefore, the welding surface and the welding zones of its adjacent peripheral areas on both sides are unified to form a combined working surface suitable for welding.

[0027] Preferably, the wall thickness of the welded surface of the enclosed control space is less than or equal to the wall thickness of the adjacent rib element, and in particular, at least less than the wall thickness of the thickest part of the rib element. This also helps to save material without affecting the welding capability.

[0028] Preferably, the vacant space extends from an opening on one of the weld surfaces, which is defined at the top and bottom by the peripheral area of ​​the rib element, and extends in a direction perpendicular to the front end to the weld arm, until it reaches the interior of the weld surface on the opposite weld side. At each weld arm end, the opening may be defined by a thickened portion that extends in the direction of the channel axis and is disposed inside the opposite weld surface.

[0029] Preferably, in each welding arm, the welding area of ​​the rib element, at least one welding surface of the closed void space, particularly the aforementioned thickened portion, lies in the same plane (welding plane) on the welding surface, and welding is performed on this plane. This plane may be parallel to or not parallel to the channel axis. In one possible non-parallel embodiment, the welding plane may be offset downwards from the channel axis or approach the channel axis from below.

[0030] The present invention can specify that the surface area in contact with the thin film layer during the welding process can have different surface embodiments, particularly depending on the welding method used. Preferably, the contact surface is at least the surface of the peripheral area or welding area, the welding surface that closes the void space, and the shell surface area that surrounds the channel axis and connects to the surface area of ​​the welding arm.

[0031] These contact surfaces can be configured to be smooth, for example, particularly unstructured, especially in cases where the conduction of welding energy is introduced.

[0032] In another embodiment, these contact surfaces may also be configured to be rough, particularly structured, preferably by means of structures such as protrusions, to provide an initial point for fusion, especially during ultrasonic welding.

[0033] For example, the structure can be configured to be arranged in a raised manner on the contact surface within a specific size range, preferably 0.02-0.05 mm.

[0034] Particularly preferably, respective gaps from the welding side can be defined, where the gaps on the welding side are closed by the welding surface and widen in the direction toward the welding side where the gaps are open, particularly in the height direction (i.e., the spacing direction of the rib elements). In the spacing direction at the ends of the welding arms, enlarged gaps are preferably provided, i.e., the welding arms taper toward the ends of the welding arms. Therefore, particularly easy demolding can be achieved between the produced sprue and the mold protrusions defining the gaps on the injection mold.

[0035] A preferred embodiment may specify that each rib element is arranged around a transverse plane perpendicular to the channel axis. The aforementioned transverse plane and frontal plane are preferably perpendicular to each other. This allows the transverse planes of different rib elements to be spaced apart from each other.

[0036] In this embodiment, it is further preferred that the face of the rib element pointing towards the vacant space is inclined relative to the transverse plane in which the rib element is located. Therefore, the aforementioned expansion of the vacant space in the direction toward its open side can be achieved, thereby promoting improved demolding capability.

[0037] Another preferred embodiment may provide a collar disposed on the rib element closest to the second end of the gating channel, i.e., particularly on the lowest rib element, which expands the weld area / peripheral area of ​​the rib element and points away from the rib element. Since the lowest rib element has no further adjacent rib elements, the weld area of ​​the lowest rib element will be confined within the thickness of its peripheral area.

[0038] The integrally formed collar extends downwards to align with the welded area. Preferably, the welded area of ​​the rib element is significantly enlarged by at least the height of the collar, thus the rib element is thickened downwards, particularly around the periphery. This results in improved load-bearing capacity of the welded joint between the welded area and the film layer, precisely where the greatest movement exists between the film layer and the welded area during use.

[0039] The collar can form an elastic area that prevents the film in that area from being stretched during the welding process.

[0040] Particularly preferably, the collar has a chamfered or rounded corner on its lower periphery (pointing outward). This also allows pressure to be directed away from the membrane.

[0041] Preferably, it can be specified that, when viewed along the channel axis, the thickness of at least one rib element, preferably the thickness of all rib elements, increases only on one or both sides of the transverse plane in the direction toward the weld arm end, and / or, when viewed along the channel axis, the height of the gap between two rib elements decreases in the direction toward the weld arm end.

[0042] As a result, the effective weld surface increases towards the weld arm end. Furthermore, when the projection of the weld surface is viewed in a direction perpendicular to the front, an expanded overlap of two weld surfaces appears in the region at the weld arm end, these two weld surfaces being arranged to cancel each other out on the two weld sides. This improves the load-bearing capacity of the weld arm end.

[0043] In terms of their position relative to the channel axis, the empty spaces on the two welding arms are the same when viewed in the direction of the channel axis, and preferably they are closed or open to the same welding side.

[0044] Furthermore, preferably, two identically configured vacant spaces, passing through the shell surface region extending to the second end region between the two welded arms, can be connected by a groove. The height of the latter, measured in the channel axis direction, preferably corresponds to the height of the vacant space in the same direction.

[0045] However, the invention may also specify that the shell surface area is not provided with grooves, and the shell surface area at the height level of the two empty spaces of different arms has a curved surface shape, which corresponds to the surface shape between the welding surfaces of the two welding arms on the same welding side, which closes the empty space.

[0046] A further preferred structural embodiment specifies that, in the welding area, the gating channel has two parallel planar / flat channel wall regions opposite each other around the channel axis, with the rib elements of the two welding arms (3a) connected to the channel wall regions. Therefore, the planar / flat shape exists at least on the side of the channel wall adjacent to the rib element. Thus, the planar / flat surface of the channel wall points towards the empty space. Demolding during injection molding is preferably performed in a direction parallel to this surface. The channel wall radially inward toward the channel axis can also be configured as non-planar, but this channel wall is preferably configured there in exactly the same manner.

[0047] The casting channel in the welding area between two parallel and opposing channel wall regions can have multiple reinforcing ribs that extend radially inward from the inner surface of the channel wall. The inner surface of the channel wall between the parallel, planar channel wall regions can have a curved profile, particularly with a fixed radius relative to the channel axis.

[0048] The following section describes further implementation schemes that can be combined with all the implementation schemes mentioned above.

[0049] For example, it can be specified that the welding surface that closes the void space is configured to protrude outward relative to at least one peripheral region of the rib element adjacent to the welding surface, preferably outward relative to two peripheral regions of the rib element adjacent to the welding surface.

[0050] Preferably, such a protruding weld surface is configured as a planar surface, or has a curvature along the interval direction of the peripheral region, particularly an outwardly protruding curvature, at least within the region, particularly at least within the region extending from the shell surface region of the second end region to the weld arm end. Preferably, such curvature exists in a plane whose direction is perpendicular to the extent direction of the peripheral region of the rib element extending in a straight manner.

[0051] This prominent weld surface can be formed, for example, by the supply of welding material compressed during the welding process, particularly to the surrounding area.

[0052] One embodiment may further specify that the welding surface that closes the void space is arranged to be aligned with the peripheral area of ​​at least one rib element adjacent to the welding surface, preferably with the peripheral areas of two rib elements adjacent to the welding surface.

[0053] It can be specified that, among the weld surfaces and the weld surfaces with protruding peripheral regions arranged in the configuration, the weld surfaces and / or peripheral regions, at least in the region extending from the shell surface region of the second end region to the end of the weld arm, are configured as planes or have curvature extending in a plane perpendicular to the channel axis. Such curvature can be configured such that the weld surfaces and peripheral regions in the observation plane are configured to be concave or convex outwards.

[0054] The preferred embodiments will be described in more detail with reference to the accompanying drawings.

[0055] Figures 1 to 4 The first preferred embodiment is shown, which, apart from the differences discussed later, shares common features with all other embodiments in the figures, features which will not be described again in the following figures. The figures show features of different views according to the invention in each case.

[0056] Their common characteristics are as follows:

[0057] The illustrated gating gate has a gating channel 1 that extends longitudinally along the channel axis 1b. The first channel wall 1a of the gating channel 1 in the upper first end region 2a is configured at least substantially circular-cylindrical in cross section and forms a gating nozzle.

[0058] The upper first end region 2a has an externally supported first channel wall 1a with an external thread that mates with a cap having a corresponding internal thread (this cap is not described herein and is not essential to the invention), thus allowing the pouring nozzle to be selectively closed or opened. The pouring port is an area that can be covered by the cap, and the contents of the film bag are not shown herein from which they can be removed.

[0059] The first channel wall 1a of the lower second end region 2b is surrounded by a welding region 3, which includes two welding arms. In this region, the surrounded channel wall does not necessarily correspond to the circular-cylindrical shape visible in the upper region.

[0060] Welding area 3 includes two welding arms 3a and 3b, which are arranged in opposite directions around the channel wall / channel axis and extend in the opposite direction away from the channel axis 1b / first channel wall 1a. In each case, the film layer of the film bag is welded to the welding arms 3a and 3b on two opposing first welding sides 6a and second welding sides 6b, thus enclosing the welding area between the film layers. The first welding sides 6a and second welding sides 6b are located on either side of an imaginary front plane that includes the channel axis 1b and the ends 4a, 4b of the two welding arms. In this way, the front plane is located at the center of the gating gate and parallel to the film layer of the film bag (not shown).

[0061] Figure 3 and Figure 4 The cross-sectional view particularly highlights that each weld arm 3a, 3b includes multiple (here, three) rib elements 5a, 5b, 5c. Possible embodiments are not limited to the three rib elements shown. In particular, more than three rib elements can also be provided, simply extending the embodiment downwards in a similar manner. The rib elements are preferably configured as planar elements and, in each case, extend around a transverse plane 10a, 10b, 10c perpendicular to the channel axis 1b. The rib elements 5a, 5b, 5c, or their transverse planes 10a, 10b, 10c, are spaced apart in the direction of the channel axis 1b.

[0062] In the height direction corresponding to the channel axis 1b, two adjacent rib elements 5a and 5b, or 5b and 5c, in each case surround vacant spaces 8a and 8b. These respective vacant spaces 8a, 8b occupy the space between the facing surfaces of the rib elements 5a, 5b, 5c; thus, each vacant space is particularly inside each weld arm 3a, 3b. The vacant spaces 8a, 8b in the two weld arms 3a, 3b have the same relative position with respect to the channel axis 1b.

[0063] In particular, Figure 3 The cross-sectional view highlights that each rib element 5a, 5b, 5c on the first weld side 6a and the second weld side 6b has a peripheral region 7a or 7b, respectively. The peripheral regions 7a and 7b extend substantially across the height of the rib elements 5a, 5b, 5c (when viewed along the channel axis 1b). This peripheral region 7a, 7b, particularly its outward-pointing end face, forms a welding zone, used alone or together with the enlarged facet for welding to the thin film layer. Figure 1The perspective view highlights the surrounding areas 7a and 7b, or the welding area, which converges towards the end of the welding arm. This specifically led to the hull-shaped design of the welding area.

[0064] Figure 4 It is highlighted that the rib elements 5a, 5b, and 5c are integrally connected to the second channel wall 1c in the lower second end region 2b.

[0065] For the purposes of this invention, it is important that in each of the two adjacent empty spaces 8a, 8b in each welding arm 3a, 3b, each of them is open only to one of the first welding side 6a and the second welding side 6b, while the other side is closed by the welding surface 9, which connects the adjacent peripheral areas and expands the latter's welding area.

[0066] from Figures 1 to 4 As can be seen, the upper vacant space 8a in the two welding arms 3a and 3b opens towards the second welding side 6b and closes towards the first welding side 6a through the welding surface 9. Conversely, the lower vacant space 8b opens towards the first welding side 6a and closes towards the second welding side 6b through the welding surface 9. Therefore, the implementation is the same in the two welding arms on the same welding side. If there are two or more vacant spaces located below each other, the latter preferably closes or opens alternately towards one welding side and the other in the direction of the channel axis.

[0067] In particular, Figure 2 The view of the end 4b of the welding arm highlights the welding surface 9, which closes the upper and lower gaps, or closes the gaps through outward openings, respectively, offset on both welding surfaces, particularly through the height difference between the two gaps. Therefore, the welding area 3 with respect to the front plane is not mirror-symmetrical.

[0068] Reference Figure 2 The mold protrusions used to form the upper empty spaces 8a and 8b during injection molding are inserted into the sprue from the second weld side 6b toward the first weld side 6a, up to the inner wall of the upper weld surface 9. For the lower empty space 8b, the sprue is inserted from the first weld side 6a toward the second weld side 6b, up to the inner wall of the upper weld surface 9. Therefore, demolding can be performed perpendicular to the spacing direction of the weld arm ends 4a and 4b.

[0069] The inner gaps 8a and 8b are continuous from the welding surface 9 to the opening on the opposite side without interruption, and preferably expand in this direction.

[0070] The thickness of the welded surface 9, when viewed perpendicularly to the front, is preferably less than the thickness of the thickest rib elements 5a, 5b, and 5c when viewed in the direction of the channel axis 1b. Preferably, in all possible embodiments herein, the term "welded surface" is understood not only as the functional surface used for welding, but also as the wall element having that functional surface.

[0071] Figure 3 The diagram shows the meandering profile of the rib elements 5a, 5b, 5c and the weld surface 9, caused by the outward offset of the openings of the weld surface 9 or the empty spaces 8a, 8b. The meandering profile continues when there are more than two empty spaces 8a, 8b.

[0072] from Figure 2 As can be clearly seen, there is no wall surface on the front plane about the center. The reinforcement of rib elements 5a, 5b, and 5c in the direction of channel axis 1b is carried out alternately by the outer welding surface 9, which has the function of expanding the welding area.

[0073] The radially protruding collar shown with respect to the first channel wall 1a, preferably arranged between the first end region 2a and the second end region 2b, can serve as a stopper for the cover and as a functional element with original protection.

[0074] for Figures 1 to 4 In the first embodiment, more specifically, on each of the two welded sides, the open gap spaces (e.g., the gap space 8a across the shell surface region 12 connecting the two welded arms 3a, 3b on the second welded side 6b) transition to each other through the groove 13.

[0075] Furthermore, preferably, the empty spaces 8a and 8b on the outward-facing plane have the same height everywhere.

[0076] Furthermore, in this embodiment, the lowest rib element has a downwardly projecting collar 11, which in particular also serves as a downward expansion of the welding area and / or, with its high elasticity, retains the stress of the membrane at this location. Such a collar may be omitted in other embodiments.

[0077] on the contrary, Figure 5 and Figure 6 A second embodiment according to the invention is shown, wherein the aforementioned groove 13 is absent, while other features are the same. The shell surface region 12 has an arcuate profile at the opening height of the vacant space that is the same as the height of the weld surface, closing other vacant spaces on the same weld surface.

[0078] Figure 7 and Figure 8 A third implementation scheme is shown, which has the same characteristics as... Figures 1 to 4The same features are available, but the groove 13 may not be provided. In this case, the thickness of the rib elements 5a, 5b, 5c or the height of the empty spaces 8a, 8b decreases in the direction toward the welding arm ends 4a, 4b.

[0079] Figure 8 In particular, in this embodiment, the effectively usable welding surface is enlarged in the direction toward the welding arm ends 4a, 4b. In particular, for this reason, in a projection perpendicular to the front, the overlapping portion of the welding surfaces 9 on the first welding side 6a and the second welding side 6b is enlarged compared to other embodiments.

[0080] Figure 9 The bottom view of the gating gate is shown. This gating gate is the same as the collar 11 in the previous embodiment. It can be seen from the figure that the channel wall of the gating channel in the lower second end region 2b has two planes / second channel walls 1c, which are parallel to each other and connected to the rib element. The lowermost 5c can be seen here.

[0081] In the channel wall region between the second channel wall 1c in the plane, the reinforcing ribs 14 point radially inward toward the channel axis 1b.

[0082] Furthermore, it can be seen that at level 1d, that is, at the height of the collar with the original protective function, the casting channel 1 transitions from a cylindrical internal shape to a shape with a second channel wall 1c having parallel planes. However, it should be noted that the present invention is not limited to the internal shape of the casting channel 1 shown in all possible embodiments.

[0083] Figure 10 and 11 A view of one embodiment is shown, in which the aforementioned collar 11 is absent. In this embodiment, the bottom-facing welding area 3 terminates at the lower end face of the lowest rib element 5c. Alternatively, all other features described above may also be implemented in this embodiment, particularly with or without the groove 13 shown.

[0084] All the figures show such an implementation in which the peripheral regions 7a, 7b of the rib elements 5a, 5b that serve as the welding area, and / or the welding surfaces 9 that enclose the empty space 8a, are preferably arranged to be aligned with each other and extend at least in a straight line toward the welding arm ends 4a, 4b, particularly between each welding arm end 4a, 4b and the curved shell surface region 12.

[0085] In the region between the connection of the rib elements 5a, 5b and the two second channel walls 1c of the second end region 2b, the welded areas preferably transition continuously to each other. The welded areas may be enlarged by closing the welded surface 9 through the gap of the shell surface region 12, which is curved to bulge outward.

[0086] For all embodiments shown according to the invention, and generally for all possible embodiments not shown according to the invention, the invention may also specify that the peripheral regions 7a, 7b, particularly the weld surface 9 including the closed void space, are configured with a curved profile, particularly between the weld arm ends 4a, 4b and the shell surface region 12, which is curved to bulge outward.

[0087] For example, the mutually aligned welding surfaces 9 and the surrounding regions 7a, 7b may have a curvature at least in the region, particularly at least in the region extending from the shell surface region 12 of the second end region 2b to the welding arm ends 4a, 4b, which extends in a plane perpendicular to the channel axis 1b and is configured to be concave outward, particularly where the curvature transitions to the shell surface region 12, and conversely, the curvature bends to be convex outward.

[0088] Figure 12 This configuration is shown in an embodiment without the collar 11 in an axial view of the gating point from below. However, this configuration can also be provided in embodiments with the collar 11, as is also true in the following figures.

[0089] on the contrary, Figure 13 An embodiment is shown in an axial view from bottom to top, wherein the mutually aligned weld surfaces 9 and peripheral regions 7a, 7b have curvature at least in the region, particularly at least in the region extending from the shell surface region 12 of the second end region 2b to the weld arm ends 4a, 4b, which extends in a plane perpendicular to the channel axis 1b and is configured to bulge outward, particularly wherein the curvature transitions to the shell surface region 12, which bends into an outward bulge.

[0090] Figure 14 and 15 One implementation is shown, in which the welding surface 9 is arranged to protrude outward relative to the surrounding areas 7a, 7b.

[0091] Figure 14 The welding surface 9 in the middle has a flat plane, wherein Figure 15 The welded surface 9 bends outward, particularly bulges outward. The curvature exists in a plane, the direction of which is perpendicular to the peripheral regions 7a and 7b that extend in a straight line. Here, the curvature extends along the spacing direction of the peripheral regions 7a and 7b.

[0092] It should be pointed out that,Figure 14 and 15 The implementation plan can also be combined with Figure 12 and 13 The implementation plan is combined with the above.

Claims

1. A pouring port for a film bag, comprising a pouring channel (1). a. Wherein, the pouring channel (1) is configured as a pouring nozzle in the first channel wall (1a) of the first end region (2a); and b. The second channel wall (1c) on the second end region (2b) is surrounded by the welding region (3); c. Among them, The welding area (3) has two welding arms (3a, 3b), which extend in opposite directions to their respective welding arm ends (4a, 4b) perpendicular to the channel axis (1b) of the casting channel (1); and d. Each welding arm (3a, 3b) has multiple rib elements (5a, 5b, 5c), which are connected to the second channel wall (1c) and spaced apart from each other in the direction of the channel axis (1b); and e. Each rib element (5a, 5b, 5c) on the first welding side (6a) has a first peripheral region (7a) extending between the second channel wall (1c) and the welding arm ends (4a, 4b), and the second welding side (6b) has a second peripheral region (7b) extending between the second channel wall (1c) and the welding arm ends (4a, 4b); f. The first peripheral region (7a) and the second peripheral region (7b) form the first welding area and the second welding area, which converge in the direction toward the welding arm ends (4a, 4b). Its features g. In each weld arm (3a, 3b), a single gap space is provided between two adjacent rib elements (5a, 5b / 5b, 5c), and each gap space is open on one of the two weld sides and closed by the weld surface (9) on the other of the two weld sides. Each welding arm (3a, 3b) has at least one first vacant space (8a), which is closed on the first welding side (6a) and open on the second welding side (6b); and Each welding arm (3a, 3b) has at least one second vacant space (8b), which is open on the first welding side (6a) and closed on the second welding side (6b).

2. The pouring gate according to claim 1, characterized in that, Each welding arm (3a, 3b) has only one first vacancy space (8a).

3. The pouring gate according to claim 1 or 2, characterized in that, Each welding arm (3a, 3b) has only one second vacancy space (8b).

4. The pouring gate according to claim 1, characterized in that, The adjacent empty spaces in the direction of the channel axis (1b) are alternately closed or opened towards the first welding side (6a) and the second welding side (6b).

5. The pouring gate according to claim 4, characterized in that, When viewed through the weld arms (3a, 3b) in a cross section perpendicular to the spacing direction of the weld arm ends (4a, 4b), the rib elements (5a, 5b, 5c) and the welded surfaces (9) that close the void spaces have a meandering profile.

6. The pouring gate according to claim 1, characterized in that, The wall thickness of the welded surface (9) that closes the void space is less than or equal to the wall thickness of the adjacent rib elements (5a, 5b, 5c).

7. The pouring gate according to claim 1, characterized in that, Starting from the first weld side (6a) closed by the welding surface (9) of the first vacant space (8a), it expands in the direction of the second weld side (6b) open by the first vacant space (8a).

8. The pouring gate according to claim 1, characterized in that, Each rib element (5a, 5b, 5c) is arranged around a transverse plane (10a, 10b, 10c) which is perpendicular to the channel axis (1b).

9. The pouring gate according to claim 8, characterized in that, The faces of the rib elements (5a, 5b, 5c) pointing to the empty space are inclined relative to the transverse plane (10a, 10b, 10c) where the rib elements (5a, 5b, 5c) are located.

10. The pouring gate according to claim 1, characterized in that, A collar (11) is disposed on the rib element in the second end region (2b) closest to the pouring channel (1), the collar (11) being used to enlarge the welding area of ​​the rib element and pointing away from the rib element.

11. The pouring gate according to claim 1, characterized in that, When viewed in the direction of the channel axis (1b), the thickness of at least one rib element (5a, 5b, 5c) increases in the direction along the weld arm end (4a, 4b), and / or when viewed in the direction of the channel axis (1b), the height of the gap space between the two rib elements (5a, 5b, 5c) decreases.

12. The pouring gate according to claim 1, characterized in that, In terms of their position when viewed in the direction of the channel axis (1b), the vacant spaces in the two welding arms (3a, 3b) with the same configuration are either closed or open toward the same welding side.

13. The pouring gate according to claim 12, characterized in that, Two identically configured vacant spaces are connected by a groove (13) that passes through the shell surface region (12) of the second end region (2b) extending between the two welded arms (3a, 3b).

14. The pouring gate according to claim 13, characterized in that, The height of the groove (13) measured in the direction of the channel axis (1b) corresponds to the height of the empty space in the same direction.

15. The pouring gate according to claim 1, characterized in that, In the welding area (3), the casting channel (1) has two parallel second channel walls (1c) that are opposite each other about the channel axis (1b), and the rib elements (5a, 5b, 5c) of the two welding arms (3a, 3b) are connected thereto.

16. The pouring gate according to claim 15, characterized in that, The casting channel (1) of the welding area (3) between two parallel and opposing second channel walls (1c) has a plurality of reinforcing ribs (14) extending from the inside of the channel wall toward the inner diameter.

17. The pouring gate according to claim 1, characterized in that, The welding surface (9) that closes the void space is arranged to protrude outward relative to at least one peripheral region of the rib element (5a, 5b, 5c) adjacent to the welding surface (9).

18. The pouring gate according to claim 17, characterized in that, The protruding weld surface (9) is at least within the area: a. Configured in a planar shape; or b. It has a first curvature along the spacing direction of the surrounding area.

19. The pouring gate according to claim 18, characterized in that, The first curvature is configured to bulge outwards.

20. The pouring gate according to claim 1, characterized in that, The welded surface (9) that closes the empty space is arranged to be aligned with at least one peripheral region of the rib element (5a, 5b, 5c) adjacent to the welded surface (9).

21. The pouring gate according to any one of claims 17 to 20, characterized in that, The welded surface (9) and the surrounding area are at least within the area: a. Configured in a planar shape; or b. It has a second curvature in a plane perpendicular to the channel axis (1b).

22. The pouring gate according to claim 21, characterized in that, The second curvature configuration is either concave or convex outward.

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