Method for producing dispensers, and dispenser

Abstract

The invention relates to a method for producing dispensers for discharging a fluid (F), a first and a second dispenser (1), the second dispenser being able to dispense a different, for example greater discharge amount than the first dispenser. Both dispensers (1) have a pump piston (2) and a pump chamber component (3) which is formed as a rigid body. Furthermore, in the pump chamber component (3), an inlet opening (10) which can be closed by an inlet valve (9) is formed, and an outlet opening of the pump chamber (7) is formed in association with the pump piston (2) in the dispenser (1), which outlet opening can be closed by an outlet valve. In addition, a first cylindrical wall portion (4) of the pump chamber component (3), said first cylindrical wall portion interacting with the sealing lip (8) of the pump piston (2), transitions into a larger-diameter second wall portion (5). According to the invention, in order to advantageously change a dispensing volume, in a first step the first wall portion (4) of the second dispenser (1) is formed with a second diameter, while the diameter of the second wall portion (5) is maintained, and in a further step a suitably changed radial extent of the transition wall (6) of the second dispenser (1) is formed, and in addition, in a further step, the second diameter of the sealing lip (8) of the pump piston (2) of the second dispenser (1) is suitably changed, for example increased.

Description

Description Methods for manufacturing dispensers and dispensers field of technology

[0001] First, a method for manufacturing dispensers for dispensing a fluid is described, namely a first and a second dispenser, wherein the second dispenser can dispense a different, for example, larger quantity than the first dispenser, wherein both dispensers have a pump piston and a pump chamber component formed as a rigid body, wherein the pump piston and the pump chamber component define a pump chamber, wherein the dispensers further have a restoring means for moving the pump piston from the end position to the initial position, wherein the pump piston of the first dispenser further has a sealing lip with a first diameter, with the sealing lip movably resting against an inner surface of the pump chamber component for movement along a longitudinal axis of the pump chamber between an initial position and an end position.wherein furthermore an inlet opening which can be closed by an inlet valve is formed in the pump chamber component and an outlet opening of the pump chamber which can be closed by an outlet valve is formed in the dispenser, in addition wherein a first cylindrical wall section of the pump chamber component which cooperates with the sealing lip of the pump piston transitions in one piece into a second wall section with a larger diameter which runs concentrically to the first wall section via a circumferential transition wall which points radially outwards with respect to the longitudinal axis.

[0002] Furthermore, a dispenser for spraying a fluid is described, with a pumping device, wherein the pumping device comprises a pumping chamber, an inlet valve, an outlet valve and a pump piston with a longitudinal axis, wherein furthermore, during a pumping process, a 31387N1PCT mue / g / gz 2,02,2026Fluid pressure is generated for the output of the fluid and the outlet valve has a sealing position in which it is in a sealing position against the pump piston. State of the art

[0003] Dispensers as described above are known in the prior art in various embodiments. Reference should first be made to the unpublished application PCT / EP2024 / 071969. Further reference should also be made to CN 107264970 A, WO 2008 / 003076 A2, EP 1477234 A2 and US 3877616 A. Summary of the invention

[0004] One problem arises from the fact that the dispenser is to be provided with different dispensing volumes. Based on the published state of the art, the task is to specify a design that enables the most efficient possible production of dispensers with different dispensing volumes.

[0005] This problem is solved procedurally according to a first teaching of the invention by first forming the first wall section of the second dispenser with a second, for example larger, diameter, while maintaining the diameter of the second wall section, in a further step forming an adapted modified, for example reduced radial extent of the transition wall of the second dispenser, and in a further step the second diameter of the sealing lip of the pump piston of the second dispenser being adapted and enlarged.

[0006] Accordingly, different application volumes of such dispensers can be achieved by making changes that are essentially, preferably 31387N1PCT mue / g / gz 2,02,2026 only, insofar as they concern the first wall section of the second dispenser and the transition wall, and furthermore the piston with regard to the sealing lip connected to the piston or provided as an integral part thereof.

[0007] These changes can be achieved relatively easily on the relevant parts, which are preferably manufactured using plastic injection molding, by simple changes in the shape, such as modifiable mold walls or mold cores, which can be snap-fit ​​or screw-fit.

[0008] Because the first and second dispensers can be otherwise identical in design, especially with the same external dimensions and otherwise unchanged and identical parts, they can not only be manufactured rationally with different dispensing volumes, but can also be used without difference with regard to logistics, packaging, shelf placement, etc.

[0009] The first and second dispensers do not constitute a limitation. A large number of dispensers with different application volumes can be produced according to the method described here; however, at a minimum, a first and a second dispenser must be produced.

[0010] Regarding the method, it is further preferred that the pump chamber component and / or the pump piston are manufactured as a plastic injection-molded part in a pump chamber component injection mold or a pump piston injection mold. This allows the aforementioned and necessary modifications to be easily achieved with regard to different dispensing volumes of different dispensers, whereby these are generally 31387N1PCT mue / g / gz 2,02,2026 then it is about dispenser series that are manufactured in very high quantities with each specific output volume.

[0011] In further detail, it is preferred that the pump chamber component injection mold has a pump chamber mold core for shaping the first and second cylindrical wall sections as well as the transition wall; that the pump chamber mold core has a pump chamber mold core part for shaping the first cylindrical wall section and the transition wall, which is interchangeably attached to the pump chamber mold core; that the pump chamber component injection mold has a pump chamber outer mold for shaping the first and second cylindrical wall sections as well as the transition wall.that the pump chamber outer mold has an outer mold part for shaping the first cylindrical wall section and the transition wall, and that the outer mold part is interchangeably attached to the pump chamber outer mold, and that for the manufacture of the second spray pump, the pump chamber mold core part and the outer mold part for shaping the pump chamber of the first spray pump are exchanged for a pump chamber mold core part and an outer mold part for shaping the pump chamber of the second spray pump.

[0012] With such a design of the injection mold, the pump chamber can be easily modified to achieve a different output volume by replacing the aforementioned parts as described.

[0013] Furthermore, it is also preferred that the pump piston injection mold has a mold core, with a mold core part that serves to shape the sealing lip of the pump piston, that the mold core part is interchangeably attached to the mold core, and that for the production of the second dispenser the 31387N1PCT mue / g / gz 2,02,2026The mold core part for shaping the sealing lip of the pump piston of the first dispenser is replaced with a mold core part for shaping the sealing lip of the pump piston of the second dispenser.

[0014] Thus, with the steps now described, the injection mold for a first dispenser with a first output volume can easily be changed into an injection mold for a second dispenser with a second output volume.

[0015] The dispensing volumes are not limited to two. A large number of dispensers with a variety of different dispensing volumes can be advantageously manufactured in this way. A dispensing volume between 50 and 140 ml is preferred. Brief description of the drawings

[0016] The invention is further explained below with reference to the accompanying drawing, which, however, only represents examples of embodiments. This shows: Fig. 1 shows a dispenser with a first dispensing volume in a longitudinal cross-section, in the unactuated position; Fig. aa shows a detailed representation of the possible interaction of the restoring device with a support part; Fig. 2 shows the dispenser according to Figure 1 in the activated position; Fig. 3 shows a cross-section through the dispenser according to Figure 1 along line III-III in Figure 1; 31387N1PCT mue / g / gz 2,02,2026Fig. 4 a cross-section through the dispenser according to Figure 1 along line IV-IV in Figure 1; Fig. 5 shows a cross-section through the dispenser according to Figure 1 along line VV in Figure 1; Fig. 6 shows a cross-section through the dispenser according to Figure 1 along line VI-VI in Figure 1; Fig. 7 shows the dispenser according to Figure 1 in a perspective, partially broken view; Fig. 8 shows the dispenser according to Figure 1 in a representation according to Figure 7 with a second dispensing volume; Fig- 9, Fig. 9a, Fig. 9b shows a simplified representation of an injection mold with interchangeable mold parts for the production of the pump chamber component for the first and second dispensers; Fig. 10, Fig. 10a, Fig. 10b shows a simplified representation of an injection mold for manufacturing the pump piston with different mold parts for manufacturing the first and second dispensers; 31387N1PCT mue / g / gz 2,02,2026Fig. 11 the pump piston in perspective view from obliquely below, in exploded view with the valve body and the pump chamber component; Fig. 12 shows the components according to Figure 11 in a perspective view from an oblique angle above; Fig. 13 shows an attachment part of the dispenser in a partially cutaway, perspective view from an oblique angle above; Fig. 14 shows the part according to Figure 13 in a perspective view from a low angle; Fig. 15 the actuating part with a first closure cap; Fig. 16 is a representation according to Figure 15, cut along line XVI-XVI; Fig. 17 shows the actuating part with a second cap; Fig. 18 is a representation according to Figure 17, cut along line XVIII-XVIII; Fig. 19 shows the actuating part with a third cap; Fig. 20 is a representation according to Figure 19, cut along line XX-XX; Fig. 21 shows the actuating part with a fourth cap; 31387N1PCT mue / g / gz 2,02,2026Fig. 22 an exploded view, partially cut away, of the actuating part with the closure cap according to Figure 21; Fig. 23 shows a cross-sectional view through the cap alone; Fig. 24 shows a sectional view along line XIV-XIV in Figure 21 in the unactuated state; and Fig. 25 shows a representation according to Figure 24 in the actuated state. Description of the embodiments

[0017] A dispenser 1 is shown and described, which is designed to dispense a first dispensing volume of a fluid F, which is contained in a storage vessel 27.

[0018] The dispenser 1 can have a pump piston 2 and / or a pump chamber component 3.

[0019] The pump chamber component 3 can further comprise a first cylindrical wall section 4 and a second wall section 5. The second wall section 5 is also preferably cylindrical. The first wall section 4 and the second wall section 5 are preferably arranged one after the other in the discharge direction of the fluid F.

[0020] The first cylindrical wall section 4 can transition into the second wall section 5 by means of a transition wall 6.

[0021] The pump chamber component 3 is preferably a total of, comprising the first and second wall sections 4, 5 and the transition wall 6, 31387N1PCT mue / g / gz 2,02,2026 One-piece injection-molded plastic part. The pump piston 2, together with the pump chamber component 3 and a valve component 11 (described in more detail below), can define a pump chamber 7. The pump piston 2 itself can be formed with a continuous internal cavity 70; see, for example, Figure 2 (magnified view).

[0022] The first cylindrical wall section 4 preferably has a smaller inner diameter with respect to a central longitudinal axis A of the pump chamber 7, which preferably also coincides with a central longitudinal axis A of the pump piston 2, than corresponds to a corresponding inner dimension of the second, preferably cylindrical, wall section 5. If the inner dimensions of the wall section 5 differ in the direction of the longitudinal axis A, the smallest inner dimension is used.

[0023] The transition wall 6 can, as shown in the exemplary embodiment, run approximately perpendicular to the longitudinal axis A. However, it can also be formed at an acute or obtuse angle to the longitudinal axis A.

[0024] Furthermore, the pump piston 2 preferably has a sealing lip 8 that interacts with an inner surface of the first cylindrical wall section 4. In this case, the sealing lip 8 can be completely closed and preferably, as in the exemplary embodiment, be arrow-shaped downwards, corresponding to an inlet valve 9 of the pump chamber 7. As also shown, it can be a double sealing lip 8.

[0025] An inlet opening 10 of the pump chamber component 3 can be closed by means of an optional inlet valve 9. The closure of the inlet opening 10 by the inlet valve 9 can be further restricted by a 31387N1PCT mue / g / gz 2,02,2026 The valve part 11, if provided, is movably arranged in the cavity 70 of the pump piston 2 in the exemplary embodiment and preferably.

[0026] The inlet valve is preferably designed as part of the one-piece valve part 11, as in the exemplary embodiment. The valve part 11 is preferably rod-shaped overall, and more preferably of a fixed length. The valve part 11 further preferably has an outlet valve 44 at one end opposite the inlet valve 9, which is described in more detail below. During pressure build-up for spraying the fluid F, the pump chamber 7 can be bounded on one side by the inlet valve 9 and on the other side by the outlet valve 44. An annular volume between the valve part 11 and an inner surface of the pump piston 2 that bounds the cavity 70 can be part of the pump chamber 7 and thus be included in the pump chamber volume.

[0027] The first cylindrical wall section 4 can transition seamlessly into the second, optionally cylindrical, wall section 5 of the pump chamber component 3 via the transition wall 6. The transition wall 6 can be formed with a radial outward projection with respect to the longitudinal axis A, in order to connect the second wall section 5, which has a larger diameter, with the first cylindrical wall section 4.

[0028] The dispenser 1 can further include a return element 12. In the exemplary embodiment, and preferably, the return element 12 is formed as a pump bellows 26. By means of the return element 12, the spray pump can be returned from an end position according to Figure 2 to the initial position according to Figure 1. 31387N1PCT mue / g / gz 2,02,2026

[0029] With reference to Figures 9, 9a, 9b, a possible injection mold 13 for a pump chamber component is shown, comprising a pump chamber outer part 14 and a pump chamber mold core 15. The pump chamber outer part 14 is shown here as two parts. In principle, it can also be formed in one piece or consisting of more than two parts.

[0030] In the pump chamber outer mold part 14, an interchangeable part can be arranged as an outer mold part 16. As can be seen from a comparison of Figures 9 and 9b, if the outer mold part 16 is omitted, the first cylindrical wall section 4 of the pump chamber component 3 to be manufactured can be formed with a larger radius, and correspondingly the transition wall 6 with a smaller extent. The interchangeable part is preferably formed here as a cylindrical sleeve.

[0031] The pump chamber mold core 15 comprises a pump chamber mold core part 17, which is preferably replaceable. The pump chamber mold core part 17 can essentially also be formed as a cylindrical sleeve part. In the exemplary embodiment, and preferably, however, it also has a radial enlargement at its upper end in order to facilitate the transition to the modified transition wall 6.

[0032] When the parts are combined according to Figure 9b, the pump chamber mold core part 17 is visibly attached to the pump chamber mold core 15, so that the first cylindrical wall section 4 with the aforementioned, here by way of example larger, diameter can be formed.

[0033] In contrast, in the design according to Figure 9a, the pump chamber mold core part 17 is not attached to the pump chamber mold core 15, whereas the outer mold part 16 is attached to the pump chamber outer mold part 14. 31387N1PCT mue / g / gz 2,02,2026 is attached, so that the first cylindrical wall section 4 with reduced diameter and the transition wall 6 with greater radial extent can be injected.

[0034] Due to different wall thicknesses of the outer mold part 16 and the pump chamber mold core part 17, a large number of intermediate sizes of the pump chamber component 3 can also be produced rationally in this area.

[0035] More generally, it is possible that, in order to manufacture the second dispenser 1, the pump chamber mold core part 17 and / or the outer mold part 16 for shaping the pump chamber 7 of the first dispenser 1 are removed, or that the pump chamber mold part 17 and / or the outer mold part 16 are replaced with a pump chamber mold core part 17 and a pump chamber outer mold part for shaping the pump chamber 7 of the second dispenser 1.

[0036] Furthermore, the piston injection mold 18 preferably has a piston injection mold core 21, which further preferably has an interchangeable piston mold core part 22.

[0037] As can be seen from Figures 10a and 10b, the pump piston 2 can thus be manufactured with a sealing lip 8 of smaller diameter, Figure 10a, and with a larger diameter, Figure 10b.

[0038] For the production of the pump piston 2 with the sealing lip of smaller diameter, the piston outer mold part 20 is preferably inserted in the piston injection mold 18, here assigned to the piston injection mold outer mold 19, in the area of ​​the sealing lip. The piston mold core part 22 is preferably not inserted in the piston injection mold core 21. 31387N1PCT mue / g / gz 2,02,2026

[0039] To manufacture the pump piston 2 with a larger sealing lip according to Figure 10b, the piston outer mold part 20 is not used in the piston injection mold 18, but the piston mold core part 22 is used in the piston injection core 21.

[0040] In Figures 10, 10a, and 10b, the piston injection mold 18 is also shown as a two-part structure. In principle, it can also be formed as a single piece (with respect to the outer mold part) or as more than two parts. Furthermore, with respect to the piston injection mold 18, wall thicknesses of the piston outer mold part 20 and the piston core part 22 can be provided to create a multitude of different volumes with different thicknesses, each as a separate, interchangeable part.

[0041] By preferably modifying practically only the pump chamber component 3 in the area of ​​the first wall section and the transition wall, and / or the pump piston 2 only with respect to the sealing lip, the rod-like valve part 11 can be used unchanged, regardless of the actual spray volume achieved with a specific dispenser, specifically a spray pump. The necessary design for the movement of the valve part 11 over a limited distance in the axial direction, as explained in more detail below, can also be independent of the actual spray volume achieved. The mounting feature for this on the pump chamber component 3 is located upstream of the optionally modifiable first wall section 4 with respect to the flow direction of the fluid F. If necessary, only a part of the pump chamber 7 needs to be modified, namely insofar as the pump piston 2 interacts with the first cylindrical wall section 4 via the first sealing lip 8.An additional part of the pump chamber 7, essentially defined by the annular space between the valve part 11 and an inner surface of the pump piston 2, which is preferably located in the 31387N1PCT mue / g / gz 2,02,2026 The essential part extending in a flow direction of the fluid F beyond the sealing lip 8 does not need to be changed.

[0042] The modified parts of a corresponding spray pump with respect to different volumes are particularly evident in Figures 7 and 8. Figure 7 shows a spray pump, focusing on the parts of interest here, with a small spray volume, and Figure 8 shows one with a larger spray volume.

[0043] Referring further to Figures 1 to 8, the dispenser 1 preferably further comprises an actuating part 23, more preferably the valve part 11, and more preferably a mounting part 25. Between the actuating part 23 and the mounting part 25, a bellows part 26 can be included as a return element in the exemplary embodiment, and preferably. The mounting part 25 can hold the dispenser 1 or the spray pump 1 on the reservoir 27.

[0044] The actuating element 23 can have a nozzle section 54, which preferably has an elongated shape and preferably an outlet opening 37 at its upper end. The nozzle section is preferably tubular, but, particularly in its outer contour, preferably tapered upwards. Furthermore, the actuating element 23 preferably has actuating extensions 78. These can project radially outwards with respect to the axis A, preferably extending substantially perpendicular to the axis A. They are preferably integrally formed at a lower end of the nozzle section 54. The actuating extensions 78 form actuating surfaces 53 on their upper sides. A user can thereby depress the actuating element 23 to spray liquid from the reservoir 27. Alternatively, only one circumferential actuating extension 78 may be provided. 31387N1PCT mue / g / gz 2,02,2026

[0045] A connecting collar 79 is formed on the underside of the actuating extensions 78, but preferably associated with a radially outer edge of an annular plate section 74 (see also Figures 24 and 25), into which the nozzle section 54 transitions on the underside and on which the actuating extensions 78 are preferably formed with radial projections. The connecting collar 79 extends from the plate section 74 in the opposite direction to the nozzle section 54. The connecting collar 79 serves for an axially movable, yet secured connection with the mounting part 25. For this purpose, the connecting collar 79 may have an inwardly projecting retaining bead 80 at its lower end.

[0046] The return element, here in the form of the pump bellows 26, can be arranged in the space thus created between the mounting part 25 and the actuating part 23. For inward centering, at least on the upper side with respect to the return element, a centering wall 81 extending radially inward and in the same direction as the connecting collar 79 can be formed on the actuating part 23, preferably on the annular circumferential area, the plate part 74.

[0047] The pump chamber component 3 can hold a suction pipe 28 at its end, inside the reservoir 27. It can also have a plate-shaped extension 94 at its end, as shown. This can, for example, provide a certain degree of stability to the pre-assembled unit, which is not yet placed on the reservoir 27 and in which the suction pipe 28 may not yet be inserted.

[0048] A sealing ring 30 can be arranged between an upper mouth rim 29 of the storage vessel 27 and the mounting part 25. The sealing ring 30 31387N1PCT mue / g / gz 2,02,2026 can also be radially inside and sealingly outside against the second wall section 5.

[0049] The pump chamber component 3 can further extend upwards, adjoining the second cylindrical wall section 5 at the outlet, a locking collar 31 which can be received, preferably by snapping, in a locking recess 32 of the mounting part 25. The locking collar 31 is preferably, as in the exemplary embodiment, slightly extended radially outwards, preferably less than the wall thickness of the pump chamber component 4. The locking recess is adapted accordingly in this case.

[0050] The valve part 11 is preferably mounted in the pump chamber component 3 with axially limited movement. For this purpose, locking elements 33 formed on the pump chamber component 3 can serve, which can interact with counter-locking elements 34 on the valve part 11. The locking elements 33 can be cams distributed around the circumference. The locking elements 33 can thus ensure flow. The counter-locking elements 34 can be part of a circumferential shoulder on the valve part 11. The counter-locking elements 34 can also be designed alternatively or additionally to ensure flow. For this purpose, passage grooves 71 are preferably formed in the valve part 11, extending through the shoulder (see also Figures 7 and 8).The valve part 11 can be moved between the open position shown in Figure 1 and the closed position shown in Figure 2 (where the inlet opening 10 is closed) by means of the locking means 33 and the counter-locking means 34. In the closed position of the inlet opening 10, a conical surface 36 of the valve part 11 interacts with a counter-conical surface 35 of the pump chamber component 3. The working stroke of the valve part 11 can be, for example, 0.4 to 1 mm, more preferably about 0.6 mm. 31387N1PCT mue / g / gz 2,02,2026

[0051] The valve part 11 preferably further comprises an extension section 24. The extension section 24 projects centrally and guidingly into the inlet opening 10, which is thus tubular in design. The extension section 24 is comparatively long. It preferably has a length that corresponds to a multiple of the inner diameter of the inlet opening 10, preferably two or more times up to five or ten times.

[0052] The extension section 24 widens in a funnel shape outside the inlet opening 10 and transitions into a stem section of the valve part 11. The valve part 11 is bell-shaped in this area, surrounding the upper portion of the extension section 24. The counter-conical surface 36 is formed on the outer wall of the bell shape to interact with the conical surface 35 of the pump chamber component 3, thereby achieving the valve closure. This results in a valve closure over a comparatively large diameter. A favorable force adjustment is possible.

[0053] Preferably, and preferably also achieved by the bell-shaped design, the inlet valve 9 has a larger contact area, as seen from the pump chamber 7, than the outlet valve 44. This further ensures that the inlet valve 9 remains closed during the discharge of liquid.

[0054] Because a filling wall 82 also projects into the bell area from the pump chamber component 3, a small residual volume can advantageously be achieved in this area when the valve is closed. 31387N1PCT mue / g / gz 2,02,2026

[0055] Furthermore, the continuation section 24 can lie with play in the entry opening 10, so that it can be bypassed.

[0056] The outlet valve 44 is preferably designed as a lip valve. In a longitudinal cross-section, as shown in the enlarged view in Figure 1, a V-shaped design can be provided.

[0057] The outlet valve 44 is preferably uniform in shape around its circumference. With respect to axis A, it is preferably axially symmetrical or point-symmetrical along the length of axis A. It is also formed as a single, integral part throughout the lip area. The V-shaped design is hinge-free. It opens solely through elastic deflection. This can occur at any circumferential section of the lip area. Preferably, no specific circumferential section is formed through which fluid F preferably flows when the outlet valve opens.

[0058] As shown in the magnified view of Figure 12, the funnel-shaped lip 75, viewed in the axial direction A and in the direction of fluid flow F, can first have a conically widening outwardly first section 76 and subsequently a conically tapering inwardly second section 77. The magnified view refers to a relaxed state of the outlet valve 44, not inserted in the pump piston 2. Furthermore, an end face 72 is preferably formed, which preferably has a comparatively small width. In the depicted unloaded state, the largest diameter D of the outlet valve 44 is preferably larger than an inner diameter d (compare Figure 1) of the pump piston 2. Therefore, the outlet valve 44, if applicable, always rests against an inner surface of the pump piston 2 under preload in the assembled state according to Figure 1. 31387N1PCT mue / g / gz 2,02,2026 The transition between the first section 76 and the second section 77 can provide a relatively small area of ​​maximum contact force in the direction of axis A due to the preload on the inner surface. Furthermore, a transition between the first section 76 and the second section 77 is preferably formed with a distance of 2 to 3 mm to the end face 72.

[0059] The V-shape of the exhaust valve 44 in cross-section allows the preload to be achieved favorably in the valve part 11, which is preferably manufactured in one piece and from the same plastic material.

[0060] The cone angle, with respect to a perpendicular to the axis A, with respect to which an outer wall of the first cone section 76 preferably extends outwards, is preferably selected to be between 75 and 85 degrees, and more preferably approximately 80 degrees. With respect to an inner wall, the angle can be selected to be between 65 and 80 degrees, more preferably between 70 and 75 degrees, and again more preferably approximately 73 degrees. The cone angle of the first section 76 is preferably between 7 and 10 degrees.

[0061] The valve part 11 and preferably other, substantially or completely, parts of the dispenser 1 preferably consist of the same or at least similar plastic, in particular polyethylene (PE) or polypropylene (PP). These parts are in particular the pump chamber component 3 and / or the pump piston 2 and / or the return element 12 and / or the actuating part 23, optionally also the sealing ring and the support element 42.

[0062] The pre-tensioning makes it possible to achieve the spray effect that is particularly characteristic of this spray pump. When the actuating element 23 is pressed down, liquid is not immediately released. 31387N1PCT mue / g / gz 2,02,2026 not only when a certain critical pressure is reached, which causes the lip valve of the outlet valve 44 to lift off an inner surface of the pump piston 2. Due to the circumferentially uniform design of the lip valve, it is possible for lifting to occur in any area of ​​the circumference. A complete circumferential lifting is also possible, although in practice it can be assumed that only a selected circumferential area lifts off at any given time, through which liquid then flows, while the other areas remain in contact.

[0063] This preloaded positioning in the pump piston 2 is also advantageous with regard to the movement of the valve part 24 from an actuated position according to Figure 2 to the unactuated position according to Figure 1. This movement is permitted, at least, to the extent allowed by the otherwise described limited mobility of the valve part 24. Since the inlet valve is in the open position in the unactuated state, this also achieves the desired seal with respect to the pump chamber.

[0064] In practice, an excess achieved by the diameter D is preferably 1 / 10 to 3 / 10 mm.

[0065] The sectional view in Figure 3 shows that the pump piston 2, in the section shortly before an outlet opening 37, and preferably also over a larger section of its inner free space, is designed with a star-shaped cross-section. The points of the star can each extend into an opening 43 of the pump piston 2 (see also Figures 10a, 10b, 11 and 12), which forms a supply line between the pump piston 2 and an inner surface of the actuating part 23 to the outlet opening 37. This outlet opening 37 can be formed in the actuating part 23. In the exemplary embodiment, there are three points of the star, which 31387N1PCT mue / g / gz 2,02,2026 can form three corresponding supply lines to the outlet opening. In the injection mold, see Figures 10a, 10b, good centering of the piston injection mold core 21 can be achieved by forming the openings 43 with correspondingly projecting mold sections.

[0066] On the front side, facing the outlet opening 37, one or more spacer webs are preferably formed at the corresponding end of the pump piston 2, which ensure the required distance so that the fluid F can exit through the outlet opening 37 during a spraying process while flowing around the front side of the pump piston 2.

[0067] The mounting part 25 preferably has a retaining feature 38 in a lower circumferential region for mounting on a neck region of the reservoir 27. Furthermore, in a preferably one-piece design, the mounting part 25 also preferably has a guide section 39 for guiding the pump piston 2 in a central region. Below the guide section 39, the mounting part 25 preferably has a larger inner diameter and can thus preferably form, in a region 40, separately by the second sealing lip 41, part of an air chamber 48 between the mounting part 25, the pump piston 2, and the pump chamber component 3.

[0068] The pump piston 2 can have a second sealing lip 41, see also Figures 11, 12, with which it can seal against an inner surface of the area 40 of the mounting part 25. Alternatively or additionally, a second or further sealing lip 41a, compare Figure 2, can also be formed on an associated inner surface of the mounting part 25.

[0069] Furthermore, the pump piston 2 has the sealing lip 8 – the first one in the exemplary embodiment – ​​with which it seals to form a 31387N1PCT mue / g / gz 2,02,2026 The pump chamber rests against an inner surface of the first cylindrical wall section 4 of the pump chamber component 3. As also shown in the embodiment example, this sealing lip 8 can also be formed twice directly one behind the other.

[0070] The pump piston 2 is preferably detented in the actuating part 23. The detent is further preferably designed such that the pump piston 2 is detented upwards, towards the outlet opening 37, with a preload.

[0071] The return element, here the bellows part 26, can be supported on the inside of the actuating part 23 by a support element 42. The support element 42 can initially provide a support area, which may optionally be formed directly on the actuating part 23. The support area can be formed by one or more spacer webs. In the exemplary embodiment, the support element 42 is located on the upper side. However, it can also be provided on the underside of the return element, either alternatively or additionally.

[0072] The support area can also be formed by a support element 84, shown here only as an indication, arranged between the return element and the actuating element 23 or the mounting element 25. The support element can be disc-shaped. In this case, the end of the return element rests against the support element 84; it preferably does not penetrate it (see also Figure 1a).

[0073] It is particularly preferred that such a support element 84 is porous to allow air to flow through it. For this purpose, micro-openings with a free diameter of 2 g / m or less, particularly down to 0.5 µm, can be formed in the support element 84, which preferably consists of a plastic material. Preferably, the micro-openings have a 31387N1PCT µm / g / gz 2.02.2026 Diameter of approximately 1 gm. The plastic material can be a sintered plastic material. It can be produced from one or more thermoplastic polymers using heat and pressure. This allows for a controlled pore size and volume. The main materials for this can be polyethylene, polypropylene, polytetrafluoroethylene, and polyvinylidene fluoride (PVDF), which can be used individually or in combination.

[0074] With reference to Figures 13 and 14, the attachment part 25 is shown in further detail.

[0075] In particular, it can be seen that the locking collar 31 can have individual locking tongues 45 which can engage springily in the locking recess 32 during assembly.

[0076] The guide section 39 can be provided with support features 46 on its underside. In a specific design of the return element, a lower portion of the return element can be supported by these features. These support features can be individual or a circumferential shoulder. The guide section 39 can also have one or more longitudinal grooves 83. When the spray pump is actuated, these grooves can be passed over by the second sealing lips 41, thus allowing air to flow into the air chamber 48 and ultimately into the reservoir in the storage vessel.

[0077] On the underside, as can be seen particularly in Figure 14, radial projections 47 can be provided which extend into the air chamber 48. They can define the boundaries of the air chamber 48 or serve to adjust the volume of this air chamber 48. 31387N1PCT mue / g / gz 2,02,2026

[0078] They are formed below a transverse wall 49 of the mounting attachment 38. The transverse wall 49 forms a boundary on its upper side of the space in which the restoring means 12 is arranged and preferably also forms the locking recess 32 on its lower side.

[0079] A wall area 85 can adjoin the transverse wall 49 below, which preferably forms the mounting shape 38 for attachment to the storage vessel 17.

[0080] With reference to Figures 15 and 16, a first embodiment of a closure cap 50 is shown. The closure cap 50 is shown to be held, preferably in a lower region, by one or more detent features 51 on the actuating part 23 and one or more corresponding detent recesses 52 on the closure cap 50. This is preferably done in the nozzle section 54 of the actuating part 23, which projects upwards beyond the actuating surfaces 53 of the actuating part 23. The detent feature and the detent recess can also be provided on the other part.

[0081] With reference to Figures 17 and 18, a further embodiment of the closure cap 50 is shown. This is particularly advantageous with regard to child safety.

[0082] In this embodiment, the closure cap 50 has locking lugs 56 on flexible wall areas 55, which are formed with respect to a radially inner area of ​​the actuating surfaces 53 for gripping the actuating part 23. To remove this closure cap 50, the wall areas 55 must first both be pressed inwards together, after which it can be pulled upwards. 31387N1PCT mue / g / gz 2,02,2026

[0083] Furthermore, this closure cap 50, like the closure cap according to Figures 15 and 16 and the other closure caps described here, also has a preferably central sealing form 57 in the upper area, with which the outlet opening 37 is sealed when the closure cap is in place.

[0084] With reference to figures 19 and 20, a further closure cap 50 is shown.

[0085] This closure cap 50 is also particularly advantageous with regard to child safety and is preferably designed in the same way as the closure cap of Figures 17 and 18.

[0086] In preferably all embodiments described here, it can also be provided that the actuating part 23 has support ribs 58 on the inside of the nozzle section 54, which, in the assembled state, provide support and centering for the pump piston 2. The support ribs 58 preferably extend longitudinally, i.e., along axis A. This also counteracts tilting of the pump piston 2.

[0087] As already mentioned, the pump piston 2 is preferably detented in the actuating part 23, so that it moves with the actuating part 23, but preferably not relative to the actuating part 23, during actuation. This detent is further preferably configured such that the pump piston is constantly biased against an associated end face of the actuating part (inside). The actuating part 23 is preferably designed with two sections of different diameters in the direction of fluid F discharge. In the flow direction of the fluid F, a section of larger diameter is initially formed; the support ribs 55 are preferably formed in this section. 31387N1PCT mue / g / gz 2,02,2026, to which the area of ​​smaller diameter adjoins. The detent retainer of the pump piston is preferably located in the area of ​​smaller diameter. For this purpose, a detent recess on the actuating part 23 can interact with an associated inner surface of the actuating part 23 with a detent projection of the pump piston 2, or vice versa.

[0088] Furthermore, it is preferably implemented in all the closure caps 50 described here that, at least with respect to an inner wall 59, which may also be the only wall in this area, an air passage 60 remains, providing a continuous air space up to the sealing element 57 in order to allow any residual liquid to dry out after use. A connection to the outside may be provided, for example, via openings 61 and / or in the area of ​​the locking elements with respect to the locking lug 56. This also applies in the area of ​​the locking elements 62, with which the actuating part 23 is preferably axially movable but snap-fitted to the mounting attachment 38. The sealing element 57 itself is preferably not ventilated; the sealing effect is ensured when the closure cap is in place, regardless of the air space.

[0089] With reference to Figures 21 to 25, a further embodiment of the closure cap 50 is shown.

[0090] This closure cap 50 has an internal locking element 63. The internal locking element 63 is preferably formed separately from a cap part 64. The internal locking element 63 can have an actuating projection 65 that preferably protrudes centrally from the upper side of the cap part 64. By means of the actuating projection 65, for which a locking ridge 86 can be formed, the locking mechanism can be realized with respect to a through-opening 87. For assembly, the locking element is then pressed through from inside the cap so that in the assembled 31387N1PCT mue / g / gz 2,02,2026 The detent bead 86 is located on the outside. The sealing element 57 is also preferably connected to the inner detent part 63 via a spring section 66. The detent bead can prevent the inner detent part 63 from falling out when the cap is removed.

[0091] As can be seen from a comparison of Figures 24 and 25, by applying downward pressure to the actuating projection 65, the spring arms 67, which are pre-tensioned radially inwards and have the engagement sections 68, can be moved radially outwards, thus releasing the detent connection to the actuating part 23. At the same time, this initially increases the pressure of the sealing element 57 on the outlet opening.

[0092] Preferably by means of suitable guide sections 69 on the actuating part 23, it is ensured that the spring arms 67 move outwards.

[0093] In the pump chamber component 3, preferably the transition wall 6, one or more air openings 73 (see, for example, Figure 7), which are not shown in detail, are preferably provided, distributed around the circumference, to ensure air equalization with the liquid inside the container. Through the second sealing lips 41, a pneumatic force can simultaneously be exerted on the liquid during dispensing via the air openings 73, and / or an inflow of air into the storage vessel can be ensured.

[0094] The end caps described here are also each locked to the actuating part in such a way that the sealing element 57 sits on the opening with preload when the end cap is attached. 31387N1PCT mue / g / gz 2,02,2026

[0095] The sealing ring 30 preferably has a non-circular opening. This proves particularly advantageous with regard to assembly, for example, if the upper assembly is first assembled without the container and only later attached to a container. The sealing ring 30 can then bear against the pump chamber component 4 (outside) with varying degrees of preload around its circumference. 31387N1PCT mue / g / gz 2,02,2026List of reference symbols 1 dispenser, 27 storage containers 2 pump pistons 28 suction pipe 3 Pump chamber component 29 Mouth edge 4 First cylindrical wall 30 Sealing ring cut 31 Rast collar 5 second wall section 32 locking recess 6 transition wall 33 locking device 7 Pump chamber 34 Counterlock 8 First sealing lip 35 Counter cone surface 9 Inlet valve 36 Cone surface 10 Inlet opening 37 Outlet opening 11 Valve part 38 Mounting mold 12 Restoring element 39 Guide section 13 Pump chamber component - injection area 40 mold 41 second sealing lip 14 pump chamber outer mold part 41a second sealing lip 15 pump chamber mold core 42 support means 16 Outer molded part 43 Opening 17 Pump chamber core part 44 Outlet valve 18 piston injection mold 45 locking tongue 19 Piston outer shape 46 Support shape 20 Piston outer shape part 47 Radial shape 21 Piston injection mold core 48 Air chamber 22 Piston core part 49 Cross wall 23 Actuating part 50 V Closure cap 24 Continuation section 51 Detent shape 25 Mounting part 52 Detent recess 26 Bellows part 53 Actuating surface 31387N1PCT mue / g / gz 2.02.2026 Nozzle section 78 Actuating extension Wall area 79 Connecting collar Locking lug 80 Mounting bead Sealing form 81 Centering wall Support rib 82 Filling wall Inner wall 83 Longitudinal groove Air path 84 Support part Opening 85 Wall area Locking form 86 Locking bead Inner locking part 87 Passage opening Cap part Operational advantage Detent projection, spring section A axis spring arm D diameter engagement section F fluid guide section cavity Through groove d diameter end face Air vent plate part lip first cone section second cone section 31387N1PCT mue / g / gz 2,02,2026

Claims

Claims 1. A method for manufacturing dispensers for dispensing a fluid (F), a first and a second dispenser (1), wherein the second dispenser can dispense a different, for example larger, quantity than the first dispenser, wherein both dispensers (1) have a pump piston (2) and a pump chamber component (3) formed as a rigid body, wherein the pump piston (2) together with the pump chamber component (3) defines a pump chamber (7), wherein the dispensers (1) further comprise a restoring means for moving the pump piston (2) from the end position to the initial position, wherein the pump piston (2) of the first dispenser (1) further comprises a sealing lip (8) with a first diameter, with the sealing lip (8) being movably in contact with an inner surface of the pump chamber component (3) for movement along a longitudinal axis (A) of the pump chamber (7) between an initial position and an end position.wherein furthermore an inlet opening (10) which can be closed by an inlet valve (9) is formed in the pump chamber component (3) and an outlet opening of the pump chamber (7) which can be closed by an outlet valve is formed in the dispenser (1) associated with the pump piston (2), wherein, in addition, a first cylindrical wall section (4) of the pump chamber component (3) which cooperates with the sealing lip (8) of the pump piston (2) transitions in one piece into a second wall section (5) with a larger diameter via a circumferential transition wall (6) which extends radially outwards with respect to the longitudinal axis (A) and which runs concentrically to the first wall section (4), characterized in that in a first step the first wall section (4) of the second dispenser (1) is formed with a second, for example larger, diameter, while maintaining the diameter of the second wall section (5), in a further step an adapted modified,for example reduced radial extent of the transition wall (6) of the second donor (1), 31387N1PCT mue / g / gz 2,02,2026 is formed and in a further step the second diameter of the sealing lip (8) of the pump piston (2) of the second dispenser (1) is adapted, for example enlarged.

2. Method according to claim 1, characterized in that the pump chamber component (3) and / or the pump piston (2) are manufactured as a plastic injection molded part in a pump chamber component injection mold (13) or a piston injection mold (18).

3. Method according to claim 2, characterized in that the pump chamber component injection mold (13) has a pump chamber mold core (15) for shaping the first and second wall sections (4, 5) and the transition wall (6), and that the pump chamber mold core (15) has a pump chamber mold core part (17) for shaping the first and second wall sections (4) and the transition wall (6), which is interchangeably attached to the pump chamber mold core (15).

4. Method according to one of claims 2 or 3, characterized in that the pump chamber component injection mold (13) has a pump chamber outer mold part (14) for shaping the first and second wall sections (4, 5) and the transition wall (6).

5. Method according to claim 4, characterized in that the pump chamber outer form part (14) has an outer form part (16) for shaping the first cylindrical wall section (4) and the transition wall (6). 31387N1PCT mue / g / gz 2,02,20266. Method according to claim 5, characterized in that the outer mold part (16) is interchangeably attached to the pump chamber outer mold part (14).

7. Method according to one of claims 3 to 6, characterized in that, for the production of the second dispenser (1), the pump chamber mold core part (17) and / or the outer mold part (16) for shaping the pump chamber (7) of the first dispenser (1) are removed or the outer mold part (16) is replaced against a pump chamber mold core part (17) and a pump chamber outer mold part for shaping the pump chamber (7) of the second dispenser (1).

8. Method according to one of claims 2 to 7, characterized in that the piston injection mold (18) has a piston injection mold core (21) with a piston outer mold part (20) and / or a piston mold core part (22) for forming the sealing lip (8) of the pump piston (2), and that the piston outer mold part (20) and / or the piston mold core part (22) are interchangeably attached to the piston injection mold core (21) and / or the piston outer mold (19).

9. Method according to claim 8, characterized in that, for the manufacture of the second dispenser (1), the piston outer mold part (20) and / or the piston core mold part (22) for shaping the sealing lip (8) of the pump piston (2) of the first dispenser (1) is replaced by a piston outer mold part (20) and / or a piston core mold part (22) for shaping the sealing lip (8) of the pump piston (2) of the second dispenser (1).

10. Dispenser (1) for spraying a fluid (F), comprising a pumping device, the pumping device comprising a pumping chamber (7), a 31387N1PCT mue / g / gz 2,02,2026 inlet valve (9), an outlet valve (44) and a pump piston (2) with a longitudinal axis, wherein a fluid pressure is further generated during a pumping process for the discharge of the fluid (F) and the outlet valve (44) has a sealing position in which it abuts the pump piston (2) in a sealing manner, preferably manufactured according to a method according to one of claims 1 to 9, characterized in that the outlet valve (44) is movable relative to the pump piston (2) while maintaining the sealing position, and that the outlet valve (44) is deformable by the fluid pressure in a radial direction relative to the longitudinal axis for the passage of the fluid.

11. Dispenser according to claim 10, characterized in that the outlet valve (44) has an upper second conical section (77) tapering towards an end face (72) of the outlet valve (44).

12. Dispenser according to one of claims 10 or 11, characterized in that the outlet valve (44) has a first cone section (76) which is adjoining the second cone section (77) facing away from the end face (72) and tapers radially inwards.

13. Dispenser (1) for spraying a fluid, comprising a pump piston (2) and a pump chamber component (3) formed as a rigid body, wherein the pump piston (2) together with the pump chamber component (3) defines a pump chamber (7), wherein the pump piston (2) further comprises a sealing lip (8) and is movable along a longitudinal axis (A) of the pump chamber (7) between an initial position and an end position, wherein the pump chamber component (3) further comprises an inlet opening (10) which can be closed by an inlet valve (9) and, associated with the pump piston (2), an outlet opening (37) which can be closed by an outlet valve (44). 31387N1PCT mue / g / gz 2,02,2026 Pump chamber (7) is formed, wherein the pump chamber component (3) furthermore has a first cylindrical wall section (4) of the pump chamber component (3) accommodating the pump piston (2), on which the pump piston (2) rests movably with a sealing lip (8) on an inner surface of the pump chamber component (3), wherein the wall section (4) transitions in one piece into a second, larger diameter wall section (5) via a circumferential transition wall (6) extending outwards with respect to the longitudinal axis (A), which extends concentrically to the first wall section (4), wherein the dispenser (1) furthermore has a return means (12) for moving the pump piston (2) from the end position to the initial position, in particular dispensers with the features of one of claims 10 to 12, preferably manufactured according to a method according to one of claims 1 to 9, characterized in thatthat the second wall section (5) is part of an air chamber (48) bounded by a sealing agent interacting with the pump piston (2) and that the restoring agent (12) is arranged outside the pump chamber (7) and the annular space.

14. Dispenser according to claim 13, characterized in that the sealing agent is a second sealing lip (41) formed on the pump piston (2).

15. Dispenser according to one of claims 13 or 14, characterized in that the air chamber (48) has a boundary provided in addition to the second wall section.

16. Dispenser according to one of claims 13 to 15, characterized in that the sealing agent is a sealing lip formed on a boundary wall of the air chamber (48). 31387N1PCT mue / g / gz 2,02,202617. Dispenser according to one of claims 15 or 16, characterized in that the boundary in a discharge direction of the fluid (F) is formed in front of a guide section (39) for the pump piston (2).

18. Dispenser according to one of claims 13 to 17, characterized in that the sealing agent is a sealing lip (41a), optionally a second sealing lip, formed on a guide section (39).

19. Dispenser according to one of claims 15 to 18, characterized in that the pump piston (2) has a flowable interior space.

20. Dispenser according to one of claims 15 to 19, characterized in that the pump piston (2) has two different sections in relation to the interior in a discharge direction of the fluid (F), a first section of larger diameter, which is followed by a second section of smaller diameter.

21. Dispenser according to one of claims 10 to 20, characterized in that the pump piston (2) is detented in an actuating part (23).

22. Dispenser according to one of claims 13 to 21, characterized in that the restoring means (12) is a bellows part (26).

23. Dispenser according to one of claims 13 to 22, characterized in that the return means (12) is accommodated between the movable actuating part (23) and a fixed mounting part (25). 31387N1PCT mue / g / gz 2,02,202624. Dispenser according to one of claims 13 to 23, characterized in that the return means (12) rests against a closure cap (50) and / or the mounting part (25) via an air-permeable support means (42).

25. Dispenser according to claim 24, characterized in that the support means (42) is formed by one or more spacer webs.

26. Dispenser according to claim 25, characterized in that a spacer rib is formed on an inner surface of the actuating part (23) and / or the mounting part (25).

27. Dispenser according to one of claims 24 to 26, characterized in that the support means (42) is formed by a support part (84) arranged between the return means (12) or the bellows part (26) and the actuating part (23) or the mounting part (25).

28. Dispenser according to claim 27, characterized in that the support part (84) is disc-shaped.

29. Dispenser according to one of claims 27 or 28, characterized in that the support part (84) is designed to be porous for air to flow through it.

30. Dispenser according to one of claims 27 to 29, characterized in that micro openings with a free diameter of 2 mm or less are formed in the support part (84). 31387N1PCT mue / g / gz 2,02,2026

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