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CN-115379904-B - Pigment cup made of natural fiber material

CN115379904BCN 115379904 BCN115379904 BCN 115379904BCN-115379904-B

Abstract

The invention relates to a paint cup (1) for a paint spray gun (2), comprising a paint container (3) with an opening, the paint container having a can wall (3') and a cover closing the opening. The coupling section of the tank wall (3 ') is arranged in a fluid-tight manner between a first clamping surface and a second clamping surface of a cover system comprising a cover, wherein the tank wall (3') is made of a natural fiber material, in particular a cellulose-based fiber material. The invention also relates to a method for the sealed closure of such a paint cup (1). The coupling section is clamped in the radial and/or axial direction with the lid in sealing connection with the tank wall (3') made of natural fiber material.

Inventors

  • RALPH GLENN

Assignees

  • 萨塔有限两合公司

Dates

Publication Date
20260505
Application Date
20210407
Priority Date
20200408

Claims (17)

  1. 1. A paint cup (1) provided for use with a paint spray gun (2), the paint cup having a paint container (3) with an opening (4), a can wall portion (3') made of natural fibre material and a cap system (9) provided for closing the opening, the cap system comprising a cap (5) and a mating ring (10) provided for engagement with the cap, wherein a coupling section of the can wall portion is arranged in a fluid-tight manner between a first clamping face and a second clamping face of the cap system, wherein the coupling section is clamped axially and/or radially between the cap and the mating ring, wherein the mating ring comprises a handling section (12) and a functional section (11) arranged axially above the handling section, wherein the functional section comprises an outer ring circumference with a threaded section, wherein the cap section comprises a hollow flange (14) surrounding the outer ring circumference of the cap for receiving the mating ring, and wherein the hollow section has a function of being clamped between the hollow section and the outer ring circumference and the clamping face when the hollow section is clamped with the outer ring circumference.
  2. 2. Pigment cup (1) according to claim 1, characterized in that the fibre material is a cellulose-based fibre material.
  3. 3. Pigment cup (1) according to claim 1 or 2, characterized in that the tank wall (3') extends according to a longitudinal axis and is rotationally symmetrical and the coupling section is clamped between the first clamping surface and the second clamping surface in radial and/or axial direction.
  4. 4. Pigment cup (1) according to claim 1 or 2, characterized in that the coupling section is designed as an axial end section of the tank wall (3'), which end section extends conically open, or as a radially protruding annular flange, which is designed as a hollow or non-hollow sealing bead (21).
  5. 5. Pigment cup (1) according to claim 1 or 2, characterized in that the cover (5) and the mating ring (10) each have a pair of threads for mutual screwing engagement.
  6. 6. Pigment cup (1) according to claim 5, characterized in that the mating ring (10) is equipped with a handling section (12) and a functional section arranged axially above the handling section, wherein the functional section has an external first threaded section and a conically configured second sealing section surrounding the first clamping surface, and the cover (5) has a cover section (13) and a hollow flange (14) at the outer circumference, which hollow flange comprises an inner flange and an outer flange in the radial direction for receiving the mating ring (10), wherein the outer flange has a threaded section (17) mating in pairs with the threaded section, and the inner flange has the conically configured second clamping surface such that the coupling section is clamped between the first clamping surface and the second clamping surface with the first threaded section and the second threaded section in screwed engagement.
  7. 7. Pigment cup (1) according to claim 1 or 2, characterized in that the mating ring (10) is configured as a snap ring (18) comprising an annular groove (19), wherein the cover (5) and the coupling section are resiliently fastened in the annular groove (19).
  8. 8. Pigment cup (1) according to claim 1 or 2, characterized in that the cover (5) has an annular bead (22) and the cover system (9) has at least two closing parts radially opposite the annular bead (22), which closing parts are movably connected to the cover (5) via a hinge (25), wherein the cover (5) further has an annular flange, wherein the first clamping surface is arranged at this annular flange of the cover (5) and the second clamping surface is arranged at the closing parts, and wherein the first clamping surface and the second clamping surface are each configured concave.
  9. 9. Pigment cup (1) according to claim 1 or 2, characterized in that the pigment container (3) has a bottom (28) which closes the tank wall (3') at least on one side, which bottom is made of the fibre material.
  10. 10. Pigment cup (1) according to claim 9, characterized in that the tank wall part (3') and/or the bottom part (28) are made of cardboard with a weight per square meter of more than 200g/m 2 .
  11. 11. Pigment cup (1) according to claim 9, characterized in that the tank wall (3') and/or the bottom (28) is provided with a liquid-resistant coating at least on the inside.
  12. 12. Pigment cup (1) according to claim 11, characterized in that the tank wall (3') and/or the bottom (28) is provided with a solvent-resistant coating at least on the inside, which coating consists of plastic and/or aluminum.
  13. 13. Pigment cup (1) according to claim 9, characterized in that the can wall (3') and/or the bottom (28) is/are made in one, two or three layers.
  14. 14. Pigment cup (1) according to claim 13, characterized in that the can wall (3') and/or the bottom (28) are made of cardboard by primary or secondary gluing.
  15. 15. Pigment cup (1) according to claim 1 or 2, characterized in that the pigment cup (1) has a level display and/or a mixing scale in the form of an impression on the inside and/or the outside.
  16. 16. Pigment cup (1) according to claim 1 or 2, characterized in that parts of the pigment cup (1) are designed to be transparent and/or opaque for optical inspection of the liquid level and/or for a correct connection of the pigment container (3) with the cover system (9).
  17. 17. Method for sealingly closing a paint cup (1) according to any one of claims 1 to 16, characterized in that the coupling section is clamped in radial and/or axial direction with the lid (5) in sealing connection with the can wall (3').

Description

Pigment cup made of natural fiber material Technical Field The present invention relates to a paint cup for a paint spray gun. Background The paint cup for a paint spray gun has a generally closable container for paint, which can be coupled to the paint spray gun via a paint outflow opening, so that paint can flow from the paint cup into the paint spray gun (paint flow cup), where it is atomized by means of compressed air. The paint cup is made of plastic. A paint cup with a lid system closing the opening is known, for example, from EP 1,424,135 B1. Due to the increasing scarcity of global resources, alternative materials composed of sustainable raw materials are also becoming of interest for use in the field of paint cups, wherein the paint cup and lid systems to date do not have sufficient self-stability or sufficient leak-proof safety in harsh plant environments for combination with the materials. Disclosure of Invention The aim of the invention is to provide a paint cup for a paint gun with adequate tightness. According to the invention, a paint cup for a paint gun has an opening which can be closed by means of a cover which closes the opening. The coupling section of the tank wall is arranged in a fluid-tight manner between a first clamping surface and a second clamping surface of a cover system comprising a cover, wherein the tank wall is made of a natural fiber material. The friction-fit clamping of the tank wall also enables the use of low-strength materials composed of natural fiber or plant materials. A natural fibrous material or a plant material is understood to be a material such as paper, thick paper, hard paper, cardboard, corrugated board or a composite material comprising one of the above-mentioned material layers. In particular, it is a cellulose-based fibrous material. Natural fiber materials are designed, for example, as paper materials made from wood pulp, cellulose, semi-pulp or waste paper by bonding or pressing. The tank wall can be extended according to the longitudinal axis and be configured substantially rotationally symmetrical, wherein the coupling section is advantageously clamped between the first clamping surface and the second clamping surface in the radial and/or axial direction. By means of the advantageously designed clamping, it is possible to achieve a liquid-tight connection between the cover system and the paint container based on different materials and/or material pairs. In an advantageous embodiment, the coupling section is configured as a substantially axial end section of the tank wall. Alternatively, the coupling section can also be configured as a protruding annular flange pointing radially outwards from the tank wall. Advantageously, the cover system may comprise a cover and a mating ring, wherein the coupling section is clamped between the cover and the mating ring in a radial direction. Such an embodiment has the advantage that the tank wall is not or only slightly adapted and the axial end section can be adapted to existing production technology or adapted thereto with little effort. The cover system can be reused and is made of classical inorganic plastics, for example. The mating ring can be removably translated or plugged onto the paint container. Alternatively, the mating ring may be fixedly connected with the tank wall. To this end, the mating ring can be molded directly to the paint container in an injection molding process, fused as a single piece with the plastic surface of the paint container, or bonded to the paint container. The connection between the mating ring and the color container is preferably constructed in a fluid-tight manner. A particularly material-saving variant is obtained in that instead of a closed circular circumferential mating ring, only the threaded section is molded onto the paint container, preferably in the injection molding process with plastic, which can interact with the thread on the cap embodied as a screw cap. However, the mating ring configured as a plastic rim can have almost all known connection systems between it and the cover, for example screw connections, snap connections. For example, the mating ring may have a threaded edge that cooperates with a cap configured as a threaded cap. Alternatively, the mating ring may have a snap edge that cooperates with a locking tab at the cover configured to snap over the cover. The paint cup with the paint container is inventive independently of whether the coupling section of the can wall is arranged in a fluid-tight manner between the first and second clamping surfaces of the lid system comprising the lid, wherein the paint cup has a can wall made of natural fibers, in particular of cellulose-based fiber material, wherein a mating ring, preferably a mating ring made of plastic, or an injection-molded thread section is fixedly arranged at the can wall. Particularly preferably, the cover and the mating ring may each have a pair of threads for mutual screwed engagement. In th