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CN-115515722-B - Pigment cup with vent valve

CN115515722BCN 115515722 BCN115515722 BCN 115515722BCN-115515722-B

Abstract

The invention relates to a paint cup (1) for a paint spray gun (2), comprising a paint container (3) with a can wall (4) and a base (5). The base (5) is made of a natural fibre material, in particular a cellulose-based fibre material, in a pierceable manner, and has a piercing point or region for ventilation of the pigment cup (1). The invention also relates to a method for using a paint cup (1) having a base (5) made of natural fiber material, which is pierced in order to form a venting valve.

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. Pigment cup (1) for a paint spray gun (2), comprising a pigment container (3) with a tank wall (4) and a bottom (5), wherein the bottom is made of natural fibre material in a pierceable manner and the bottom has a piercing point or piercing area (6) for venting of the pigment cup, wherein the pigment cup comprises a piercing spike (7), wherein the piercing spike is designed for forming a venting valve for establishing pressure equalization by penetrating the bottom at the piercing point or piercing area, and wherein the piercing spike has a retaining mechanism such that the piercing spike is fastened at the pigment container in a venting phase and a sealing phase, the pigment cup is not in a sealing phase in a connection with the atmosphere, wherein the piercing spike has at least four mutually axially following stages, wherein a first stage forms a tip (21), a second stage forms a sealing cap (23), and a fourth stage forms a sealing cap, and wherein the first and second stage forms a groove around the venting groove and the second groove is arranged around the venting groove in the venting groove, and the second fastening groove surrounded by the bottom is occupied to hold the piercing spike in the sealing stage.
  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 puncture point or puncture area (6) is configured in conformity with the remaining bottom, the puncture point or puncture area (6) having a weakening or the bottom (5) having a reinforcement surrounding the puncture point or puncture area (6).
  4. 4. Pigment cup (1) according to claim 1 or 2, characterized in that the puncture point or puncture area (6) is characterized optically and/or tactilely.
  5. 5. Pigment cup (1) according to claim 1 or 2, characterized in that the piercing spike (7) is designed for forming at least one closable venting channel (8) by penetrating the bottom (5) at the piercing point or piercing area (6), wherein the piercing spike (7) passes through the venting channel (8) at the outer circumference of the piercing spike (7) and/or in the axial direction.
  6. 6. Pigment cup (1) according to claim 1 or 2, characterized in that the piercing spike (7) for penetrating the bottom (5) is provided with a stepped diameter of two or more stages and that the piercing spike (7) is capable of penetrating the piercing point or piercing area (6) in two or more stages, wherein the piercing spike (7) penetrates unsealed in one stage to establish pressure equilibrium and in the other stage to penetrate sealed.
  7. 7. Pigment cup (1) according to claim 1 or 2, characterized in that the piercing spike (7) has one or more axially extending venting channels (8) in the form of one or more axially extending grooves, which venting channels are arranged at the circumference of the venting roof (22).
  8. 8. Pigment cup (1) according to claim 1 or 2, characterized in that the piercing spike (7) has one or more axially extending venting channels (8) which extend into one or more radially extending venting channels at the end face of the piercing spike (7).
  9. 9. Pigment cup (1) according to claim 8, characterized in that the piercing spike (7) has one or more axially extending venting channels (8) which extend into one or more radially extending venting channels at the end face of the sealing top (22).
  10. 10. Pigment cup (1) according to claim 1 or 2, characterized in that the tank wall part (4) is made of the fibre material.
  11. 11. Pigment cup (1) according to claim 1 or 2, characterized in that the tank wall part (4) and/or the bottom part (5) are made of cardboard with a weight per square meter of more than 200g/m 2 .
  12. 12. Pigment cup (1) according to claim 1 or 2, characterized in that the tank wall (4) and/or the bottom (5) is provided with a liquid-resistant coating at least on the inside.
  13. 13. Pigment cup (1) according to claim 12, characterized in that the tank wall (4) and/or the bottom (5) is provided with a solvent-resistant coating at least on the inside, which coating consists of plastic and/or aluminum.
  14. 14. Pigment cup (1) according to claim 1 or 2, characterized in that the can wall (4) and/or the bottom (5) is a cardboard made in one, two or three layers.
  15. 15. Pigment cup (1) according to claim 14, characterized in that the can wall (4) and/or the bottom (5) is a cardboard which has been glued once or twice.
  16. 16. Pigment cup (1) according to claim 1 or 2, characterized in that the end of the pigment cup (1) facing the paint spray gun (2) has an outlet opening (20) for connection with the paint spray gun (2) or for connection with an adapter for connection with the paint spray gun (2).
  17. 17. Method for using a pigment cup (1) according to any one of claims 1 to 16, characterized in that the bottom (5) made of natural fibers is pierced in order to constitute a venting valve.

Description

Pigment cup with vent valve 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 outlet 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. In order to avoid negative pressure in the paint cup, which makes it difficult for paint to flow, when extracting paint from the paint cup, such paint cup usually has a vent valve at the side facing away from the spray gun for the interior of the paint cup to be in atmospheric communication with the surroundings. A balancing valve is known from DE 10 2011 008 316 A1, wherein the balancing valve is integrated into the base of the paint cup, which base is made of plastic. Such a vent valve requires a large production effort. Disclosure of Invention It is an object of the present invention to provide a paint cup with an economically producible balancing valve. The paint cup for a paint spray gun according to the invention comprises a paint container with a can wall and a bottom, wherein the bottom is made of a natural fiber material in a pierceable manner. The bottom has a puncture point or area for venting of the paint cup that is pierced to put the gun into use. The puncture point or region can preferably be characterized optically and/or tactilely. For example, the characterization may be performed by printed or embossed indicia. However, characterization can also be implemented in the form of an adhesive label. Natural fibrous or plant material is understood to be a material such as paper, thick paper, hard paper, cardboard, corrugated cardboard 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. In particular when the tank wall and the bottom are integrally, i.e. non-detachably connected to each other, the tank wall can also advantageously be made of natural fibre material. In an advantageous embodiment, the piercing points or piercing areas can be configured in line with the remaining base. In other words, the bottom part thus has a continuously identical wall thickness. Thereby limiting the production effort to a minimum. In one embodiment, the base can be formed substantially radially symmetrically, and the piercing points or piercing regions can advantageously be arranged eccentrically, for example in the edge region. The arrangement in the edge region has the advantage that the bottom is stiffer near the edge than in the middle, so that the bottom can be configured thinner, for example, than if the puncture point or region is arranged centrally. In an advantageous embodiment, the puncture point or region may have a weakening. Alternatively, the bottom may have a reinforcement around the puncture point or puncture area. The weakening can be introduced, for example, in the form of an embossed predetermined breaking point. The reinforcement can be formed, for example, as an additional reinforcement applied around the piercing point or the piercing region, in particular in the shape of a ring, which reinforcement is connected in a material-fitting manner to the base. It is conceivable and possible to combine the marking and the reinforcement with one another, for example in the form of a circular adhesive label which encloses the piercing area in a marked manner and at the same time reinforces the piercing point or the surrounding area of the piercing area. The paint cup may advantageously comprise a piercing spike, which is preferably substantially rotationally symmetrical and serves to penetrate the bottom. In particular, the piercing spike is designed to form a vent valve for establishing pressure equalization by penetrating the bottom at the piercing point or area. The piercing spike preferably has a piercing tip by means of which the piercing spike can pierce the bottom. Alternatively, the piercing spike may also have a thread by means of which the piercing spike can be screwed into the bottom. In the case of a particularly preferred embodiment, the piercing spike is designed to form at least one closable ventilation channel by penetrating the bottom at the piercing point or piercing area. The ventilation channel can be embossed in the piercing spike, for example, as an axially extending groove. Alternatively or additionally, it is also possible to configure the ventilation channel like a hollow needle as a centrally extending tube in the spike. In one embodiment, the piercing spike passes through the closable vent passage. Preferably, a valve may be provided in the ventilation channel which is at least partially penetrated centrally by the piercing spike, for example. Exampl