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JP-2026075069-A - Injectors for spraying devices and related spraying devices

JP2026075069AJP 2026075069 AJP2026075069 AJP 2026075069AJP-2026075069-A

Abstract

[Problem] To provide an injector for a spraying device and an associated spraying device. [Solution] An injector (126) for a multi-component coating product spraying device, wherein the injector (126) has a longitudinal direction (X) and an inlet (130), and the injector (126) has a plurality of outlet orifices (132), and is adapted so that component products are supplied at the inlet (130), so that as a result the component products exit the injector (126) through the outlet orifices (132), and each outlet orifice (132) forms a given angle (α) of 10° to 90°, preferably 30° to 90° with respect to the longitudinal direction (X). [Selection Diagram] Figure 2

Inventors

  • シリル メダール
  • シルバン ペリネ
  • ダビド バンサン
  • オリビエ グールバ
  • ドニ バンゼット
  • フィリップ フリー

Assignees

  • エクセル インダストリー

Dates

Publication Date
20260507
Application Date
20251015
Priority Date
20241021

Claims (11)

  1. An injector (26;126;226) for a multi-component coating material spraying device (10), having a longitudinal direction (X) and an inlet (130;230), wherein the injector (26;126;226) has a plurality of outlet orifices (132, 134, 136; 232, 234, 236), and is adapted so that the component product is supplied at the inlet (130;230), and as a result the component product exits the injector (26;126;226) through the outlet orifices (132, 134, 136; 232, 234, 236), The injector (26;126;226) is characterized in that 236) forms a given angle (α) of 10° to 90°, preferably 30° to 90°, with respect to the longitudinal direction (X), and further forms a second given angle (β) with respect to each radial direction (r), wherein each radial direction (r) is perpendicular to the longitudinal direction (X) and the local tangential direction, and the local tangential direction corresponds to the tangential direction of the injector (26;126;226) at the point where the exit orifice (132, 134, 136; 232, 234, 236) appears, and the second given angle (β) is not 0°, but 35° or less, preferably greater than 0° to 20°, more preferably 5° to 15°.
  2. The injector (26;126;226) according to claim 1, comprising a central channel (138;238) extending from the inlet (130;230) and secondary channels (140, 142, 144; 240, 242, 244), wherein each secondary channel (140, 142, 144; 240, 24, 244) connects its respective outlet orifice (132, 134, 136; 232, 234, 236) to the central channel (138;238).
  3. The injector (26; 126; 226) according to claim 2, wherein each secondary channel (140, 142, 144; 240, 242, 244) extends in a plane, and the plane forms a given angle (α) with the longitudinal direction (X).
  4. The injector (26; 126; 226) according to claim 2 or 3, wherein the central channel (138; 238) extends in the longitudinal direction (X).
  5. The injector (26; 126; 226) according to claim 2 or 3, wherein the cross-sectional area of the central channel (138; 238) is equal to the sum of the cross-sectional areas of the passages of the secondary channels (140, 142, 144; 240, 242, 244).
  6. The injector (26;126;226) according to claim 1 or 2, wherein the outlet orifices (132, 134, 136; 232, 234, 236) are distributed at regular angular intervals around the injector (26;126;226), and the angular interval is preferably equal to 360° divided by the number of outlet orifices.
  7. The injector (26;126;226) according to claim 1 or 2, wherein the injector (26;126;226) comprises two to five outlet orifices (132, 134, 136; 232, 234, 236), preferably three outlet orifices (132, 134, 136; 232, 234, 236).
  8. The injector (26;126;226) according to claim 1 or 2, comprising the central channel (138;238) extending from the inlet (130;230), wherein the cross-sectional area of the central channel (138;238) is strictly smaller than any arbitrary cross-sectional area of the inlet (130;230).
  9. The injector (26;126;226) according to claim 1 or 2, wherein the injector (26;126;226) is provided with a thread (148) at the inlet (22) of the injection chamber (16) for attaching and detaching the injector (26;126;226).
  10. A multi-component coating product spraying device (10) comprising a spraying element (12), an injector (14), and an injection chamber (16) upstream of the injector (14), wherein the injector (14) is adapted to inject the coating product into the spraying element (12), the spraying element (12) is adapted to spray the coating product, and the injection chamber (16) comprises a first inlet (22) for a first component of the coating product and a second inlet (24) for a second component of the coating product, the first inlet (22) comprising the injector (26; 126; 226) according to claim 1 or 2, and the first component is injected into the injection chamber (16) via the injector (26; 126; 226).
  11. The spray device according to claim 10, wherein the second inlet (24) is configured such that the second component forms a vortex (V) within the injection chamber (16), and the outlet orifices (132, 134, 136; 232, 234, 236) are configured such that the first component is injected in a flow having a radial component opposite to the vortex (V).

Description

This invention relates to an injector for a multi-component coating product spraying device and related spraying devices. The injector has an inlet and a longitudinal direction. Therefore, the injector allows one of the components to be injected, in particular, into the injection chamber, and at least one of the other components to be injected into that injection chamber. This allows the components to be mixed within the injection chamber. The quality of the mixture is crucial for the quality and durability of the coated product. However, the miscibility of components typically decreases. In particular, the pursuit of aesthetic and/or mechanical properties in coating products has led to the addition of fillers such as pigments, glass fibers, or other effect fillers. These additives reduce the miscibility of the components. Therefore, the quality of the mixture between the components is important. One possibility for improving mixing in spraying devices is to thoroughly mix the mixture before spraying to increase the mixing time and promote mixing both mechanically and chemically. However, once the components come into contact, the mixture generally has a limited lifespan. For example, in the case of a product composed of a resin and a curing agent, the product hardens once the two components are combined. Therefore, this is likely to be a problem both at low flow rates and with coating products that have a very limited lifespan after mixing. Thus, the coating product may be fully or partially cured before being sprayed. Therefore, the object of the present invention is to propose a solution for a spraying device that improves the quality of the mixture and the sprayed coating product. For this purpose, the present invention relates to an injector for a multi-component coating product spraying device, wherein the injector has a longitudinal direction and an inlet, and the injector has a plurality of outlet orifices, and is adapted to be supplied with component products at the inlet, so that the component products exit the injector through the outlet orifices, and each outlet orifice forms a given angle of 10° to 90°, preferably 30° to 90°, with respect to the longitudinal direction. The injector can release the component product at several positions at an angle to the longitudinal direction of the injector. This promotes mixing with the second component within the injection chamber, as described above. In other beneficial embodiments of the present invention, the injector includes, either alone or in any technically possible combination, one or more of the following features: - The injector comprises a central channel extending from the inlet and secondary channels, with each secondary channel connecting its respective outlet orifice to the central channel. - Each secondary channel extends in a plane, and this plane forms a given angle with respect to the longitudinal direction. - The central channel extends in the longitudinal direction. - The cross-sectional area of the central channel is equal to the sum of the cross-sectional areas of the secondary channels. - The outlet orifices are distributed around the injector at regular angular intervals, and the angular interval is preferably equal to 360° divided by the number of outlet orifices. - The injector is equipped with two to five outlet orifices, preferably three outlet orifices. - Each outlet orifice also forms a second given angle with respect to its respective radial direction, the respective radial direction being perpendicular to the longitudinal direction and the local tangential direction, the local tangential direction corresponding to the tangential direction of the injector at the point where the outlet orifice appears, the second given angle being other than 0°, 35° or less, preferably 0° to 20°, and more preferably 5° to 15°. - The injector has a central channel extending from the inlet, the cross-sectional area of the central channel being strictly smaller than any cross-sectional area of the inlet, and/or - The injector has threads at the inlet of the injection chamber for attaching and removing the injector. The present invention also relates to a multi-component coating product spraying device comprising a spray element, an injector, and an injection chamber upstream of the injector, wherein the injector is adapted to spray the coating product onto the spray element, the spray element is adapted to spray the coating product, and the injection chamber comprises a first inlet for a first component of the coating product and a second inlet for a second component of the coating product, the first inlet comprising the aforementioned injector, and the first component being sprayed into the injection chamber via the injector. According to another advantageous aspect of the present invention, the spray device has the following features: The spray device is provided with the aforementioned injector, wherein the second inlet is configured such tha