FR3015615A1 - BOISSEAU FOR A DISTRIBUTION VALVE, METHOD AND MOLD FOR MANUFACTURING SUCH BOISSEAU AND VALVE COMPRISING SUCH BOISSEAU - Google Patents

Abstract

The invention relates to a plug (1) for a dispensing valve, in particular a cooling fluid dispensing valve for a motor vehicle, resulting from the molding of material, said plug (1) comprising at least one seal line (7) coming from molding, said seal line (7) being arranged on a portion of edge (11) of the plug (1), at a distance from an outer edge (13) of said plug.

Description

Bushel for a dispensing valve, process and mold for manufacturing such a bushel, and valve comprising such a bushel The invention relates to a bushel for a dispensing valve, especially a coolant distribution valve for a motor vehicle, a method and a mold for manufacturing such a plug and a liquid distribution valve comprising such a plug. The invention finds an application in particular for the coolant distribution valves for a motor vehicle, in particular the valves comprising a rotary valve in a housing of the body of the valve, composed of a segment which cooperating with the housing allows the dispensing liquid into various ports of the valve. This plug makes it possible in particular to cover or to release by rotation the access to said orifices. It matches the shape of the housing, thus preventing the liquid from penetrating said orifices. Such a bushel is generally derived from plastic molding, which generates seal lines at the junction of mold parts, molding, which can be detrimental to the sealing of the bushel in its housing.

The invention aims to improve the situation. It is indeed proposed a plug for a dispensing valve, including a coolant distribution valve for a motor vehicle, resulting from molding of material, said plug comprising at least one seal line coming from molding, said seal line being arranged on a portion of the bush's edge, at a distance from an outer edge of the bushel. Thus, where said lines forming a burr, being arranged on the edge of the plug, are not likely to interpose between the housing and the plug and adversely affect the sealing of the plug in its housing, in particular the tightness between said openings covered and disengaged according to the angular position of the bushel. The or said joint lines may thus be deburred or not, this without affecting the tightness of the bushel in its housing, since they are not intended to bear against the housing.

According to features of the invention which can be taken alone or in combination: - said plug is configured to be mounted movably, in particular rotary, in particular in axial rotation, in a housing of the valve, - said plug comprises a segment cooperating with said housing, in particular in the form of an angularly open ring, - said edge portion is disposed on said segment, - said one or more joint lines are positioned close to an inner edge of said edge portion, in other words an edge of the segment turned towards the axis of the plug, - said one or more lines of seal are positioned at said inner edge, - said outer edge of the edge portion is rounded.

The invention also relates to a method for manufacturing a valve for a dispensing valve, in particular a valve for dispensing coolant for a motor vehicle, the method comprising a step of injecting molding material in the liquid state into the at least two mold parts applied to one another to define a molding cavity corresponding to the shape of said plug and defining a line of joint at the junction of said mold parts, said joint line being intended to be arranged opposite a portion of song of said bushel, at a distance from an outer edge of the bushel.

Said molding material is advantageously a plastic material. The invention also relates to a mold for the manufacture of a plug for a dispensing valve, in particular a coolant distribution valve for a motor vehicle, comprising at least two mold parts intended to be applied to one another, these mold parts being configured to delimit during their application on one another a molding cavity corresponding to the shape of said plug and defining a seal line at the junction of said mold parts, said seal line being intended to be disposed on a portion of the bush edge, remote from an outer edge of said bushel.

Said mold parts may each comprise a portion of said edge portion, so that said joint line resulting from the demolding of the mold, at the opening of the mold parts, is disposed on said edge portion.

Preferably, one of the mold parts has a portion of edge equivalent to said edge portion and the other mold portion has no edge portion, the other mold portion corresponding to an inner face of the segment of the plug. Thus, said joint line junction of said mold parts is disposed at said inner face of said segment, at the periphery thereof. The said edge portion or portions may be derived from milling and comprises in particular an inner edge of concave rounded section, in particular corresponding to milling said ultra-high speed. Said edge section is advantageously circular with a radius corresponding to the radius of the milling cutter for said milling.

Said mold parts, as a whole, are advantageously derived from milling, in particular milling with high speed machining. The invention also relates to a liquid distribution valve comprising such a plug.

Other features, details and advantages of the invention will emerge more clearly from the following description of an embodiment of the invention with reference to the appended drawing, in which: FIG. 1 is a partial perspective view of 1 of a valve for dispensing coolant for a motor vehicle according to the invention, FIGS. 2 and 3 are partial perspective views of one of the mold parts of the plug according to FIG. 1, and Figure 4 is an axial sectional view of the mold parts according to Figures 2 and 3, applied to one another. It should be noted that the figures expose the invention in detail, said figures can of course be used to better define the invention where appropriate. In addition, identical references are used to designate like or identical elements. With reference to the drawing, in particular in Figure 1, the invention relates to a plug 1, in particular for a coolant distribution valve for a motor vehicle, not shown. This bushel 1 is derived from molding matter. Said valve is in particular of the type comprising a valve body having a housing of revolution 3, in dotted line, for a plug, such as said plug 1, able to turn about an axis of rotation and to take different angular positions to check the fluid distribution through the valve orifices. In this valve, the plug 1 comprises a segment 5 in the form of angularly open ring, cooperating with said housing 3.

According to an exemplary embodiment, not illustrated, said valve comprises in particular an axial orifice which usually constitutes an inlet channel for the fluid, and lateral orifices constituting outlet channels for the fluid, the distribution of the fluid through the channels. output being controlled according to the angular position taken by the bushel. In a preferred application of such a valve, the side wall has three lateral orifices which form outlet channels and which communicate respectively with three branches that comprises the fluid circulation circuit associated with the valve. Such a control valve finds particular application in motor vehicle thermal engine cooling circuits. In this case, the axial orifice, forming fluid inlet, is connected to a cooling fluid inlet from the engine, while the three lateral orifices, fluid outlet, are respectively connected to three branches of the circuit. This circuit comprises a first branch which contains an engine cooling radiator, a second branch which constitutes a bypass of the cooling radiator, optionally comprising other exchangers, and a third branch which contains a heater for heating the passenger compartment. Said plug 1 comprises at least one seal line 7 resulting from the molding, more particularly from the molded material at the junction of the mold parts 9, visible in particular in FIG. 4, of said molding. According to the invention, said joint line 7 is disposed on a portion of edge 11 of said plug 1, in particular of said segment 5, at a distance from an outer edge 13 of the latter.

By outer edge 13 of said edge portion 11 is meant an edge of said edge portion disposed facing lateral walls of said housing 3. The one or more joint lines 7 correspond to creepage lines of the molded material. at the junction of the parts 9 of the mold. These seal lines 7 generally form burrs on the molded piece, here the plug 1. This or these lines of seal 7, being arranged on a portion of edge 11 of the plug, at a distance from its outer edge 13, they do not risk to interpose between the housing 3 and the plug 1 and to affect the sealing of the plug 1 in its housing 3, more particularly of its segment 5 against the side walls of said housing 3, as will be specified below.

Preferably, said one or more joint lines 7 are positioned close to an inner edge 15 of said edge portion 11 of the segment, in other words an edge turned towards the axis d of the plug 1. This arrangement provides a wide gap in the margin said outer edge 13, in particular for thin-segment or thin-gauge bushels.

According to an even more preferred embodiment, said one or more joint lines 7 are positioned at said inner edge 15, as here, in other words in coincidence with this inner edge 15. This feature makes it easier to manufacture the parts 9 mold and demolding the mold parts 9 on the other hand. Indeed, one of the mold parts 9 can be flat, as shown in Figure 4, and the other have a cavity 17 in the form of the plug 1, in particular of said segment 5. In addition, the mold release is obtained by simply opening one of the mold parts 9 with respect to the other, here in an axial translation of a mold portion 9 relative to the other. The invention also relates to a method of manufacturing such a plug 1. The method comprises a step of injecting molding material 19 in the liquid state into at least two mold parts 9 applied to one another , for example, said mold portions 9 mentioned above. As already said, these mold portions 9 delimit in this state a molding cavity 21 corresponding to the shape of said plug 1, in particular said segment 5, and define said seal line 7 at the junction of said mold portions 9. This line of joint 7 is disposed on a part of edge 11 of said plug 1, in particular of said segment 5, at a distance from an outer edge 13 of this edge portion 11. There is then a step of solidification of said material of molding 19 injected into said two mold portions 9 applied to one another, then a step of opening, as mentioned, said mold portions 9 or demolding to release said volume 21 of molded material corresponding to said bushel 1 and mold. Said molding material 19 is advantageously a plastic material, which generates a thin rib-shaped seal line 7 at said juncture of the mold parts 9, at molding. The invention also relates to a mold 23 for implementing said manufacturing method.

Such a mold 23 comprises, as here and as mentioned above, at least two mold parts 9 intended to be applied one on the other. These mold portions 9 are configured to delimit during their application to each other a molding cavity 21 corresponding to said shape of the plug 1, in particular the segment 5, and define said seal line 7 at the junction of said parts 9 of mold. This line of joint 7 is disposed on said edge portion 11 of the plug, in particular of said segment 5, at a distance from the outer edge 13 of this edge portion 11.

Said mold portions 9 may, alternatively, each comprise a portion of edge, not shown, of said edge portion 11, forming together, to the application of the mold parts 9 to one another, said part of singing 11. In this way, said seal line 7 resulting from the demolding of the mold 23, at the opening of the mold parts 9, is arranged on the edge of the molding cavity 21 of molded material or the molded plug 1. Preferably, as in the present case, one of the mold portions 9 has a portion of edge equivalent to said edge portion 11 and the other mold portion 9 has no edge portion. This last mold part 9 corresponds to an inner face 25 of the plug, in particular of said segment 5. Thus, said seal line 7 at the junction of said mold portions 9 is disposed at said inner face 25 of the segment, at the periphery of the latter as seen in Figures 1 and 4. This configuration of the mold facilitates in particular the demolding as mentioned. The said portion or portions of edge, here corresponding to said edge portion 11, may comprise an inner edge 27 of concave rounded section. These edge portions, as well as the mold parts 9, are advantageously derived from milling, in particular high-speed machining milling. Such a manufacturing method of the mold parts 9, in particular that comprising a portion of edge corresponding to the edge portion 11, as shown, is easier and faster than that of the current known modes, such as the conventional mode. by electro erosion.

Such a milling method will in particular make it possible to perform operations for grinding the surfaces of the molding cavity during the mold development steps.

Said edge section 27 is in particular circular, of radius r corresponding to the radius of the cutter 29 used for said milling. Such a rounded edge section 27 of the mold part contributes to forming an outer edge 13 of circular section on the segment 5 of the molded plug. This edge 13 thus formed has no influence on the operation of the plug 1 relative to the housing 3. The invention thus provides a plug, in particular for a dispensing valve, in particular a coolant for a motor vehicle, which provides a high level of sealing while remaining simple, easy to perform and inexpensive.

Claims (15)

REVENDICATIONS1. Bushel (1) for a distribution valve, in particular a coolant distribution valve for a motor vehicle, said bushel being derived from material molding (19), said bushel (1) comprising at least one seal line (7) coming from molding, said seal line (7) being arranged on a portion of edge (11) of the plug (1), at a distance from an outer edge (13) of said plug. 2. bushel (1) according to claim 1, configured to be mounted movably in axial rotation in a housing (3) of the valve. 3. bushel (1) according to claim 2, comprising a segment (5) cooperating with said housing (3), said edge portion (11) being disposed on said segment (5). 4. bushel (1) according to the preceding claim, wherein said segment (5) is angularly open ring-shaped. 5. A plug (1) according to any one of the preceding claims, wherein the one or more joint lines (7) are positioned close to an inner edge (15) of said edge portion (11). 6. bushel (1) according to the preceding claim, wherein the one or more lines of seal (7) are positioned at said inner edge (15). 7. A tumbler (1) according to any one of the preceding claims, wherein said outer edge (13) of the edge portion (11) is rounded. 8. A method of manufacturing a plug (1) for a dispensing valve, in particular a coolant distribution valve for a motor vehicle, the method comprising a step of injecting molding material (19) in the liquid state. in at least two mold parts (9) applied to one another to define a molding cavity (21) corresponding to the shape of said plug (1) and defining a joint line (7) at the junction of said parts ( 9), said seal line (7) being disposed on a portion of edge (11) of said plug (1), at a distance from an outer edge (13) of said plug. 9. A method of manufacturing a plug (1) according to claim 8, wherein said molding material (19) is a plastic material. 10. Mold (23) for manufacturing a valve for a dispensing valve, especially a motor vehicle coolant dispensing valve, said mold comprising at least two mold parts (9) intended to be applied to each other. the other, these mold parts (9) being configured to delimit during their application on one another a molding cavity (21) corresponding to the shape of said plug (1) and defining a seal line (7). ) at the junction of said mold parts (9), said joint line (7) being intended to be arranged opposite a edge portion (11) of the plug (1), at a distance from an external edge (13) of said bushel. The mold (23) according to claim 10, wherein said mold portions (9) each comprise a portion of said edge portion (11). 12. Mold (23) according to claim 10 or 11, wherein one of the mold parts (9) comprises a portion of edge (11) equivalent to said edge portion (11) and the other portion (9). mold contains no portion of vocals. 13. Mold (23) according to one of claims 10 to 12, wherein said edge portion (s) (11) are derived from milling and comprises in particular an inner edge (27) of concave rounded section. 14. Mold (23) according to one of claims 10 to 13, wherein said mold parts (9), as a whole, are derived from milling, including ultra high speed milling. 15. Liquid distribution valve comprising a plug (1) according to any one of claims 1 to 7.