Electrodes for electro-hydraulic molding chambers

Abstract

The present invention relates to an electrode (100) for an electrohydraulic molding chamber (300), comprising a body (102) including a first end (150) and a compression lock fastening system (110), wherein the compression lock fastening system (110) is configured to hold one end (240) of a fuse link (200) with respect to or within the body (102) at the first end (150) of the electrode (100), and the fastening system (110) moves between a released position and a locked position, wherein in the released position of the fastening system (110), the end (240) of the fuse link (200) is positioned and withdrawn, and in the locked position of the fastening system (110), electrical contact is made between the end (240) of the fuse link (200) and the body of the electrode (100).

Description

Technical Field

[0001] The present invention relates to the field of electrohydraulic forming, and more specifically, to an electrode provided with a fastening system intended for use in a discharge chamber of an electrohydraulic forming enclosure. The present invention also relates to an electrohydraulic forming enclosure provided with the electrode.

Background Art

[0002] The electrohydraulic forming (EHF) method is an ultra-high-speed deformation forming method. The EHF method enables the forming of parts with particularly complex shapes. This method is based on a high-energy discharge stored in a capacitor installed between two electrodes arranged in a discharge chamber filled with a fluid or in a soluble wire arranged between the two electrodes and placed in the chamber. When a discharge occurs in the fluid, a shock wave is generated in the fluid, which propagates and presses the sheet against the mold. The dynamic pressure generated in the sheet causes the constituent material to deform at high speed, and the pressing against the mold enables the forming.

[0003] The EHF method using a soluble wire between two electrodes has several advantages compared to the case where it is not used. In particular, the reproducibility of the phenomenon is high, the voltage required to create contact between the electrodes is low, the energy loss before breakdown is small, and the total energy required is low, so a smaller generator can be used and the manufacturing cost is reduced.

[0004] In the EHF method, since the soluble wire is a consumable, a new soluble wire needs to be attached for each discharge. In the prior art, the soluble wire was fixed or clamped with screws, thereby ensuring good electrical contact between the electrode and the soluble wire.

[0005] However, this installation system has drawbacks, particularly the time required to position the soluble wires to each electrode via the screws. First, the ends of the soluble wires must be shaped, for example, into an S-shape to surround each screw, which requires special tools. Furthermore, when tightening the screws, the soluble wires rotate in the tightening direction, preventing proper tightening. In addition, considerable tightening torque is required to ensure electrical contact, requiring considerable force from the operator. Therefore, for each EHF discharge used to form the component, the positioning time to attach the soluble wires to the electrodes via the screws can take up to approximately 10 minutes.

[0006] Furthermore, the screws that position the soluble wires deteriorate quickly and typically need to be replaced every 10 discharges. The holes for inserting the screws into the electrodes require periodic tapping, which further increases molding time and cost. In addition, residue from the soluble wires adheres to the screws, especially the threads, making removal difficult. This cleaning process is also very time-consuming. In fact, careful removal of the stubborn residue is necessary to ensure good electrical contact when the screws are used again. These cleaning problems result in considerable time loss in the process of positioning the soluble wires through the screws, leading to increased manufacturing costs.

[0007] All of these drawbacks can result in significant cost and time losses for electro-hydraulic molding methods using soluble wires. [Overview of the project]

[0008] The present invention aims to solve problems that arise when attaching fusible components to electrodes in electrohydraulic molding. Its objective is to provide an effective solution that ensures reliable electrical contact between the fusible component and the electrode while reducing the time required for fixing the fusible component and removing any residue. This solution simplifies the fastening process and reduces the costs associated with using consumable fusible components.

[0009] For this purpose, the present invention relates to electrodes for electro-hydraulic molding enclosures, - The main body including the first end, - A fastening system configured to hold the end of a soluble strip against or within the body of the electrode at the first end of the electrode by compression lock, It is characterized by having the following features.

[0010] The fastening system moves between the released position and the locked position. - The release position of the fastening system is intended to allow positioning and removal of the end of the soluble strip, - The locked position of the fastening system is intended to allow electrical contact between the end of the soluble strip and the body of the electrode.

[0011] Therefore, the electrode according to the present invention is provided with a fastening system that advantageously enables easy and rapid installation of a soluble strip onto the electrode by easily switching the fastening system from a released position to a compressed-lock position.

[0012] The fastening system is - A bearing portion intended to make contact with the end of the soluble strip, - An elastic return member connected to the bearing portion, configured such that, in the locked position of the fastening system, the first end of the elastic return member exerts a restoring force on the bearing portion relative to the body of the electrode, It is equipped with.

[0013] This fastening system allows the operator to position the soluble strip more easily and quickly simply by moving the bearing. Furthermore, the presence of an elastic return member allows the soluble strip to be easily secured to the electrode body using its restoring force, ensuring the necessary and sufficient mechanical and electrical contact without the need for external tools or special operations.

[0014] According to a preferred embodiment, the present invention further realizes the following features, which can be realized individually or in any technically feasible combination.

[0015] According to a preferred embodiment, the elastic return member is selected from compression springs, tension springs, torsion springs, and elastic bands. These elastic return members are easily integrated into the fastening system and do not require complex or special manufacturing processes.

[0016] According to a first preferred exemplary embodiment of the electrode of the first configuration, the bearing portion comprises a rod connected to a head, and the body of the electrode has a through guide hole at the first end for receiving the rod. Furthermore, the elastic return member is a compression spring or tension spring, with a coil wound around the rod. Such a configuration has the advantage of guiding the movement of the bearing portion and improving the stability of the fastening system when positioning the soluble strip.

[0017] According to a preferred embodiment of the first example, the first end of the elastic return member is intended to be connected to the bearing portion, and the second end of the elastic return member is intended to be connected to the frame of the electro-hydraulic molded enclosure.

[0018] According to a preferred embodiment of the first example, one end of the bearing rod is connected to a head, and the other end of the rod is provided with a nut. The body of the electrode is positioned between the head and the nut, and the return member is positioned around the rod between the body of the electrode and the nut.

[0019] According to a preferred embodiment, the body is - The first flat region, - A pair of spiral inclined paths arranged around a guide hole on a first flat region, wherein the head of the bearing portion moves between the upper and lower parts of the spiral inclined paths when the bearing portion rotates about the longitudinal axis of the rod, It is equipped with.

[0020] And the electrodes are, - In the release position of the fastening system, the head of the bearing part is located above the spiral inclined path, - In the locked position of the fastening system, the head is configured to be located below the spiral inclined path.

[0021] According to a second preferred exemplary embodiment of the electrode of the first configuration, the elastic return member is a torsion spring, the first end of which is connected to the bearing part, and the second end of which is connected to the main body of the electrode. The electrode is configured such that the torsion spring is compressed in the locked position of the fastening system.

[0022] According to a third preferred exemplary embodiment of the electrode of the first configuration, the main body of the electrode includes - a longitudinal groove provided in the main body, and - a slide having an arm inserted into the groove, the slide being configured to slide along the groove, and - two flat regions called a first flat region and a second flat region separated by an inclined surface on the main body of the electrode, the first flat region being intended to receive an end portion of the soluble strip. It is provided with.

[0023] Furthermore, the bearing part of the fastening system is connected to the slide such that the head of the bearing part moves between the first flat region and the second flat region when the arm of the slide moves in the groove.

[0024] Furthermore, the elastic return member of the fastening system is a compression spring or a tension spring, the first end of which is connected to the bearing part, and the second end of which is - In the release position of the fastening system, the head of the bearing part is located in the second flat region, - In the locked position of the fastening system, the head is connected to the slide so as to be located in the first flat region. It is connected to the slide.

[0025] According to a fourth preferred exemplary embodiment of the electrode configuration of the first configuration, the elastic return member of the electrode fastening system is an elastic band, and the fastening system is configured such that, in the locked position, the elastic band laterally surrounds the bearing portion and body of the electrode at its first end.

[0026] According to a fifth preferred exemplary embodiment of the electrode configuration of the first configuration, the elastic return member of the electrode fastening system is an elastic band, the body of the electrode has two protrusions, and the fastening system is configured such that, in the locked position, the elastic band is held by the protrusions and overlaps the bearing portion.

[0027] The present invention also relates to an electrohydraulic molding enclosure having a discharge frame including an inner wall that partitions a discharge chamber. The electrohydraulic molding enclosure comprises at least two electrodes according to the present invention that satisfy one or more of the features described above and / or described below. The at least two electrodes face each other, are partially located within the discharge chamber, and are connected to each other via soluble strips to perform an EHF method.

[0028] In another electrode configuration for an electro-hydraulic molding enclosure, the electrodes are: - The main body including the first end, - A fastening system configured to hold the end of the soluble strip to or within the body of the electrode at the first end of the electrode by compression lock, It is equipped with.

[0029] The fastening system moves between the released position and the locked position. - The release position of the fastening system is intended to allow positioning and removal of the end of the soluble strip, - The locked position of the fastening system is intended to allow electrical contact between the end of the soluble strip and the body of the electrode.

[0030] Therefore, the electrode is provided with a fastening system, which offers the advantage of allowing the soluble strip to be easily and quickly attached to the electrode by simply switching between the released position and the compressed-lock position of the fastening system.

[0031] The fastening system has a frustoconical shape and comprises a first bearing portion and a second bearing portion. The fastening system is intended to receive one end of a soluble strip between the first bearing portion and the second bearing portion. The body of the electrode has a shape complementary to the shape of the fastening system. - In the release position of the fastening system, the fastening system is separated from the electrode body. - In the locked position of the fastening system, the fastening system is laterally provided with an orifice configured to house the fastening system, such that it is inserted into the orifice of the electrode body.

[0032] Such electrodes can significantly reduce the time required for attaching and removing soluble strips.

[0033] According to a preferred embodiment, the fastening system is a frustoconical shape having a rectangular or circular cross-section.

[0034] In relation to other electrode configurations, the present invention relates to an electro-hydraulic molding enclosure having a discharge frame including an inner wall that partitions a discharge chamber. The electro-hydraulic molding enclosure comprises at least two electrodes according to the present invention that satisfy one or more of the above and / or later features. The at least two electrodes are arranged facing each other, partially located within the discharge chamber, and connected to each other via soluble strips to perform an EHF method. [Brief explanation of the drawing]

[0035] The present invention is shown in examples that are not limited to this invention and will be better understood by reading the following description, which is made with reference to the drawings shown below.

[0036] [Figure 1] A schematic cross-sectional view of an electro-hydraulic molded enclosure with soluble components is shown. [Figure 2] A schematic top view of different soluble component embodiments is shown. [Figure 3] A schematic cross-sectional view shows a portion of an electro-hydraulic molding enclosure equipped with two electrodes, according to a first modification of the first embodiment of the present invention. [Figure 4] A schematic cross-sectional view of an electrode relating to a second modification of the first configuration is shown, with a soluble component positioned relative to it. [Figure 5] This shows an exploded view of the first end of an electrode relating to a third modification of the first configuration, with a soluble component positioned relative to it. [Figure 6] Figure 5 shows a perspective view of the first end of the electrode, indicating that the electrode fastening system is in the released position. [Figure 7] Figure 6 shows a longitudinal cross-sectional view of the first end of the electrode. [Figure 8] Figure 5 shows a perspective view of the first end of the electrode, indicating that the electrode fastening system is in the locked position. [Figure 9] This shows a perspective view of the first end of the electrode according to a fourth modification of the first configuration, showing that the electrode fastening system is in the locked position. [Figure 10] Figure 9 shows another perspective view of the first end of the electrode, indicating that the electrode fastening system is in the released position. [Figure 11] A cross-sectional view of the first electrode portion according to a preferred embodiment of a fifth modified example of the first configuration is shown. [Figure 12] Figure 11 shows a top view of the first end of the electrode. [Figure 13] A cross-sectional view of the first end of the electrode according to another preferred embodiment of the fifth modification is shown. [Figure 14] Figure 13 shows a top view of the first end of the electrode. [Figure 15]A side view of two opposing first electrode ends is shown, according to a preferred embodiment of the configuration of the second embodiment of the present invention. [Figure 16] Figure 15 shows a perspective view of the fastening system associated with each electrode, indicated in the locked position. [Figure 17] Figure 15 shows a perspective view of the fastening system associated with each electrode, indicated in the release position. [Figure 18] A side view of two first electrode ends facing each other is shown according to another preferred embodiment of the second configuration. [Figure 19] Figure 18 shows a perspective view of the fastening system for each electrode, indicated in the release position. [Modes for carrying out the invention]

[0037] Elements in different diagrams, or elements in the same diagram, are not necessarily drawn to the same scale. In all diagrams, identical elements are assigned the same number.

[0038] The terms used herein should be interpreted restrictively or limitingly in any case, as they are used in reference to the detailed description of some embodiments of the present invention.

[0039] Figure 1 shows, in no particular way, an electro-hydraulic molding enclosure 300 for molding a part 600 to be molded. The electro-hydraulic molding enclosure 300 consists of two parts: a first part called a discharge frame 320 and a second part called a mold 340.

[0040] As shown in Figure 1, the discharge frame 320 may represent the upper part (depending on the orientation of the figure) of the electrohydraulic molding enclosure, and the mold 340 may represent the lower part. The discharge frame 320 includes an inner wall 322 that separates the discharge chamber 310. The mold 340 includes a molding chamber 330 having a cavity designed to be complementary to the shape that the part 600 is to take after deformation.

[0041] The discharge frame 320 and the mold 340 are detachable from each other so that the molded part 600 can be inserted into and removed from each other.

[0042] The part 600 to be molded is positioned at the interface between the mold 340 and the discharge frame 320 and held in an airtight seal. When placed inside the electro-hydraulic molding enclosure, the part 600 separates the molding chamber 330 from the discharge chamber 310.

[0043] The discharge chamber 310 is filled with an incompressible fluid, preferably a liquid, such as water. The discharge frame 320 is provided with a water supply duct (not shown) which allows the discharge chamber 310 to be connected to a water tank (not shown) and supplied with water. The discharge frame 320 is also provided with a drainage duct (not shown) which allows the discharge chamber 310 to be connected to the same tank or another tank and water to be discharged from the discharge chamber to the tank.

[0044] The discharge frame 320, the mold 340, and other essential components for electrohydraulic molding are not described in further detail herein, as their operation and embodiments are generally known to those skilled in the art.

[0045] Furthermore, the electro-hydraulic molding enclosure 300 includes an electro-hydraulic discharge system. In the non-limiting example shown in Figure 1, the electro-hydraulic discharge system includes two independent electrodes 100 that form a pair of electrodes.

[0046] Each electrode 100 comprises a longitudinal body 102. The body 102 of the electrode has a first surface 104 facing the first surface of the other electrode. The body 102 has a first end 150 extending from the first surface. The body 102 of the electrode has a second surface opposite to the first surface 104 and a second end 150 extending from the second surface.

[0047] Each electrode 100 passes through the discharge frame 320. At least a first end 150 of the body of each electrode is located inside the discharge frame 320, i.e., within the discharge chamber 310. A second end of the body of each electrode, located outside the discharge frame 320, is connected via a power cable to an electrical energy storage unit (not shown). The electrical energy storage unit comprises at least one capacitor. Various components of the electrical energy storage unit are known to those skilled in the art in their embodiments and operation and are therefore not described in further detail herein.

[0048] The electrodes 100 are positioned within the electro-hydraulic molded enclosure 300 such that an inter-electrode distance is formed between the first surfaces 104 of the main body 102.

[0049] Alternatively, without departing from the scope of the present invention, the electro-hydraulic discharge system may comprise a plurality of pairs of electrodes 100.

[0050] Alternatively, the system may comprise a central electrode and a plurality of electrodes arranged around the central electrode. A pair of electrodes is considered to consist of the central electrode and one of the electrodes arranged around it.

[0051] The deformation of part 600 is carried out by the EHF method during the molding cycle. The EHF method is based on the discharge of high energy stored in a capacitor between two electrodes. In a preferred modification, the soluble part 200 is placed between the first two ends of the electrodes.

[0052] The fusible component 200 has a strip shape, as shown in Figures 2(a) to (e). In the following description, the fusible component will be referred to as a "fusible strip". The fusible strip 200 has a longitudinal body 220. The body 220 of the fusible strip has a linear block shape with a thickness and width that are small relative to its length. The body preferably has a non-circular cross-section (perpendicular to the longitudinal direction), such as a rectangle or square. The fusible strip 200 is preferably manufactured from a fusible material such as aluminum. The body is separated by two ends 240.

[0053] Preferably, the soluble strip 200 has at least one flared end 240 relative to the body, as shown in Figures 2(a) to (c) and (e).

[0054] Preferably, the end 240 of the soluble strip 200 is provided with at least one orifice 241 as shown in Figure 2(a), or with a notch 243 as shown in Figures 2(b), (c), and (e).

[0055] The flared end 240 of the soluble strip is designed to increase the contact area with the electrode body 102 at the first end 150, making it easier for the soluble strip to be held between the two electrodes. This design improves the mechanical contact between the soluble strip and the electrodes, reducing the risk of movement or displacement of the soluble strip. Furthermore, the electrical contact between the soluble strip and the electrodes is also optimized, preventing the generation of micro-arcs.

[0056] Furthermore, each type of fusion strip has its own unique advantages, which will be explained in detail below.

[0057] According to the present invention, as shown in Figures 3 to 19, a fastening system 110 is provided at the first end 150 of each electrode 100. The electrode fastening system is configured to reversibly hold the end 240 of the soluble strip 200 at the first end 150 of the electrode to or within the body 102 of the electrode 100.

[0058] Preferably, the fastening system 110 is identical for each electrode 100 included in the electro-hydraulic molded enclosure 300.

[0059] Each fastening system is a compression lock fastening system.

[0060] The fastening system 110 moves between a locked position and an unlocked position.

[0061] The locking position of the fastening system 110 is intended to hold the end 240 of the soluble strip 200 against or within the body 102 of the electrode 100 at the first end 150 of the electrode, thereby ensuring electrical contact between the soluble strip 200 and the body 102 of the electrode 100.

[0062] The release position of the fastening system is intended to allow positioning and removal of the end 240 of the soluble strip.

[0063] According to the present invention, a configuration of two electrodes equipped with a fastening system is envisioned.

[0064] With this fastening system, the shape of the end of the soluble strip can be adapted to provide greater stability and strength when the soluble strip is fixed to the electrode using the fastening system described in the present invention.

[0065] [First Structure] According to the first configuration, as shown in Figures 3 to 14, the fastening system 110 of each electrode 100 is intended to hold the end 240 of the soluble strip 200 against the surface of the body 102 of the electrode 100 at its first end 150. The fastening system includes a bearing portion 120 in which the head 124 is intended to contact the end 240 of the soluble strip 200.

[0066] The fastening system also includes an elastic return member 140 connected to the bearing portion 120.

[0067] In the locked position of the fastening system, the elastic return member 140 exerts a restoring force on the head 124 of the bearing portion 120, pressing the head 124 against the body 102 of the electrode at its first end 150. If the soluble strip is not positioned between the head 124 and the body 102 of the electrode, the elastic return member 140 exerts force on the head 124, holding the head in direct contact with the body 102 of the electrode at its first end 150. When the strip is positioned between the head 124 and the first end 150 of the electrode, the elastic return member 140 exerts force on the head 124, reversibly holding the end 240 of the strip against the body 102 of the electrode at its first end 150, thereby ensuring electrical contact between the soluble strip 200 and the electrode 100.

[0068] Preferably, the locked position is the idle position of the fastening system 110.

[0069] This first configuration describes five non-limiting alternative embodiments of the present invention.

[0070] [First variation] According to a first modification of this first configuration, as shown in Figure 3, the fastening system 110 for each electrode 100 is a spring system.

[0071] Figure 3 shows the fastening system 110 in the released position.

[0072] The elastic return member 140 is preferably a compression spring 140, located between the head 124 of the bearing portion 120 and the inner wall 322 of the discharge chamber 310 of the enclosure. More specifically, the first end 141 of the compression spring 140 is in contact with the head 124 of the bearing portion 120, and the second end 142 of the compression spring 140 is in contact with the inner wall 322 of the discharge chamber 310. In this context, the term “in contact” may be understood as synonymous with “connected,” “fixed,” or “connected.”

[0073] The end 240 of the soluble strip 200 is intended to be positioned between the head 124 of the bearing and the first end 150 of the electrode 100. As an example for illustration, all of the soluble strips 200 shown in Figures 2(a) through (e) can be used in this first modified fastening system.

[0074] Preferably, the bearing portion 120 includes a rod 122 having a longitudinal axis. The head 124 is fixed to the rod 122. A compression spring 140 is arranged around the rod 122. The first end 150 of the electrode is provided with a through guide hole 151 for receiving the rod 122.

[0075] The rod 122 moves axially through the guide hole 151. The rod has a length such that it does not come into contact with the discharge frame 320 during its axial movement. Alternatively, the discharge frame 320 has a hole that accommodates a portion of the rod 122, and the rod has a length such that it is partially inserted into the orifice receiving the discharge frame 320 during its axial movement.

[0076] If a rod 122 is present, the end 240 of the soluble strip preferably has a notch 243 sized to partially enclose the rod 122. For illustrative purposes, the strips shown in Figures 2(b), (c), or (d) are adapted to the fastening system of this preferred embodiment of the first modification. The soluble strip 200 shown in Figure (b) has notches formed perpendicular to the length of the body 220 at each wide end 240, allowing for lateral installation of the strip, with each notch partially enclosing the rod 122. The soluble strip 200 shown in Figure (c) has a longitudinal notch at the wide end 240, also allowing for lateral installation of the strip. Installation of the strip begins with aligning the wide end 240 with the longitudinal notch of the electrode 100, which partially encloses the rod 122 of the electrode. Next, the soluble strip is rotated so that the other end aligns with the other electrode and makes contact with the rod of the other electrode. This facilitates the attachment of the soluble strip.

[0077] The locked position of the fastening system 110 is the idle position.

[0078] In the release position of the fastening system 110, the head 124 is separated from the electrode body. The compression spring 140 is compressed further in the release position than in the locked position.

[0079] To insert or remove the soluble strip 200, which is sandwiched between the head 124 and the body at the first end 150 of the electrode, the fastening system 110 is moved to the release position. To do this, for example, the operator pushes the head 124 of the bearing in the direction of arrow A, as shown in Figure 3, and separates the head 124 from the first end 150 of the electrode. This compresses the compression spring 140, as shown in Figure 3, and the soluble strip 200 can be released or inserted.

[0080] If a rod 122 is provided in the bearing section 120, the operator can press either the head 124 or the end of the rod 122.

[0081] After removing or installing the soluble strip, the operator releases the bearing. Due to the restoring force of the compression spring 140, the head (including the rod 122, if present) automatically moves toward the first end 150 of the electrode in the direction of arrow B, as shown in Figure 3. This causes the fastening system 110 to automatically return to the idle position, i.e., the locked position.

[0082] In another embodiment of this first modification, although not shown, the elastic return member 140 may be an extension spring instead of a compression spring, and those skilled in the art will be able to adapt the fastening system accordingly.

[0083] [Second variation] According to a second modification of the first configuration, as shown in Figure 4, the electrode fastening system 110 is a spring system.

[0084] The elastic return member 140 is a torsion spring.

[0085] One arm of the torsion spring 140 is directly or indirectly connected to the head 124 of the bearing section 120, and the other arm of the torsion spring 140 is fixed to the body 102 of the electrode 100.

[0086] The bearing portion 120 is a lever. The head 124 of the lever 120, by the restoring force of the torsion spring 140, presses the end 240 of the soluble strip 200 against the body 102 of the electrode, allowing it to be held at the first end 150 of the electrode.

[0087] As shown in Figure 4, the locked position of the fastening system 110 is the idle position of the fastening system.

[0088] In the released position of the fastening system 110, the head 124 is separated from the electrode body, allowing the soluble strip to be positioned or removed. The torsion spring 140 is more compressed in the released position than in the locked position.

[0089] For example, to move the fastening system to the release position, the operator lifts the lever 120. This causes the arm of the torsion spring 140 connected to the lever 120 to rotate in the direction along arrow B, as shown in Figure 4, and the torsion spring 140 deforms. As a result, the torsion spring 140 is compressed, and the soluble strip 200 can be released or inserted.

[0090] After removing or installing the soluble strip, the operator releases the lever 120. The arm of the torsion spring connected to the lever then rotates in direction A, as shown in Figure 4. Thus, the head 124 of the lever 120 is returned to the body 102 of the electrode at the first end 150 by the restoring force exerted by the torsion spring 140. The torsion spring then applies a constant contact pressure to the end 240 of the soluble strip 200 via the lever 120, ensuring electrical contact between the soluble strip and the electrode.

[0091] As an example of the explanation, any type of soluble strip shown in Figure 2 may be used in the fastening system of this second modification.

[0092] In a preferred embodiment, to more stably hold the soluble strip, the electrode body 102, as shown in Figure 4, is provided with a pin 158 positioned facing the head 124 at its first end 150. Therefore, preferably, a soluble strip 200 is used, having an end 240 with an orifice 241 or notch 243, and the pin 158 receives the orifice 241 or notch 243 of the soluble strip. The dimensions of the pin are determined to match the orifice or notch of the soluble strip. As an example, the strips shown in Figures 2(a), (b), (c), or (e) are adapted to the fastening system of this preferred embodiment of the second modification.

[0093] [Third variation] According to a third modification of the first configuration, the fastening system 110 for the electrode 100 is a so-called "thumb wheel" system, as shown in Figures 5 to 8.

[0094] The bearing section 120 of the fastening system comprises a head 124 and a rod 122 having a longitudinal axis. One end of the rod 122 is connected to the head 124, and a nut 126 is fixed to the other end of the rod 122.

[0095] The elastic return member 140 is a compression spring positioned around the rod 122, between the electrode body 102 and the nut 126. The first end 141 of the compression spring 140 is fixed to the nut 126. The second end 142 of the compression spring is fixed to the electrode body 102 at the first end 150.

[0096] The body 102 of the electrode 100 has a circular cross-section, but is not limited to this. Preferably, the first end 150 of the electrode body 102 is provided with a first flat region 153. The first flat region 153 extends from the first surface 104 of the electrode body and is intended to receive the end 240 of the soluble strip.

[0097] The electrode body 102 is provided with a through guide hole 151 at its first end 150. The guide hole 151 leads to a first flat region 153. This guide hole 151 is intended to accommodate the rod 122 of the bearing portion 120 within the gap, allowing the rod 122 to move axially within the guide hole.

[0098] The body 102 of the electrode 100 further preferably includes a pair of helical ramps 152 arranged around the guide hole 151 on the first flat region 153, as shown in Figure 5. Each helical ramp 152 rises continuously from a lower to a higher portion, for example, with a semicircular curvature.

[0099] The spiral ramp 152 is symmetrical in the diametrical direction.

[0100] The bearing portion 120 is positioned facing the body 102 of the electrode such that the head 124 is positioned on the side of the first flat region 153 and the nut 126 is positioned on the opposite side in the diametrical direction.

[0101] In one embodiment, as shown in Figure 7, the body 102 of the electrode 100 includes a recess 101 located directly opposite the first flat region 153. The guide hole 151 leads to the recess 101. The recess 101 is sized to partially accommodate the compression spring 140.

[0102] The bearing head 124 is positioned to contact a pair of spiral inclined paths 152. This head, and by extension the bearing, moves by rotating along the spiral inclined paths 152.

[0103] As shown in Figure 8, in the locked position of the fastening system 110, the head 124 is in contact with the lower part of the helical ramp 152, i.e., the first flat region 153, or with the strip if a strip exists on the first flat region 153. The head 124 further includes a notch 127 for receiving the helical ramp 152 when the fastening system is in the locked position.

[0104] As shown in Figure 6, in the released position of the fastening system 110, the head 124 is located at the top of the helical ramp 152. Therefore, it is away from the surface of the electrode body. The compression spring 140 is more compressed in the released position than in the locked position.

[0105] The transition from the locked position to the unlocked position, and vice versa, is performed by the rotational movement of the bearing portion 120 around the axis of the rod 122.

[0106] For example, to move the fastening system 110 to the released position, the operator rotates the bearing head 124 around the axis of the rod 122, causing the head to rise along the helical ramp 152 and compress the compression spring 140. This causes the head 124 to move away from the first flat region 153 in the axial direction of the rod 122, allowing the soluble strip 200 to be removed or inserted between the head 124 and the first flat region 153, as shown in Figures 6 and 7.

[0107] To return the fastening system to the locked position, the operator releases the bearing, which automatically returns the compression spring 140 to its initial shape. Due to the tension of the compression spring, the head 124 descends along the helical inclined path, approaching the first flat region 153 of the electrode body along the axial direction of the rod 122. Finally, the head 124 locks the end 240 of the soluble strip into the first flat region 153, as shown in Figure 8.

[0108] In a preferred embodiment, the top of each helical ramp 152 is flat. Therefore, even if the operator rotates the bearing head 124 to position it on the flat surface of the top of the helical ramp, the head remains in place, and the fastening system 110 can be held in the released position.

[0109] In this preferred embodiment, in order to lock the soluble strip 200, the operator needs to rotate the head 124 so that the head is away from the flat surface at the top of the helical ramp. Thus, the tensile force of the compression spring 140 returns the fastening system 110 to the idle position, i.e., the locked position.

[0110] Preferably, the end 240 of the soluble strip is provided with a notch 243 designed to accommodate the helical inclined path 152 of the electrode. As an example, the strips shown in Figures (b) to (e) of Figure 2 are adapted to this third modified fastening system.

[0111] [Fourth variation] According to a fourth modification of the first configuration, the fastening system 110 for the electrode 100 is a so-called "slide" system, as shown in Figures 9 and 10.

[0112] Similar to the third modification, the electrode 100 has a body 102 having a circular cross-section. The first end 150 of the electrode body 102 is provided with a first flat region 153 extending from the first surface 104 of the electrode body 102. This first flat region is for receiving the end 240 of the soluble strip 200.

[0113] The body of the electrode 100 further includes a second flat region 155. This second flat region is positioned to extend from the first flat region 153 in the longitudinal direction of the body. The second flat region 155 preferably has a shallower depth than the first flat region 153. The two flat regions are connected to each other by an inclined surface 154.

[0114] Furthermore, the body 102 of the electrode 100 is provided with at least one groove 131 in the longitudinal direction. The electrode 100 further comprises a slide 130 configured to move along the groove 131. In a non-limited example, the slide 130 is provided with at least one arm 132 that is inserted into at least one groove 131 and guided by at least one groove.

[0115] Preferably, the electrode body has two parallel grooves 131 located on two opposite sides of the body, as shown in Figures 9 and 10. The slide 130 has two arms 132, each arm being inserted into one of the two grooves 131 and configured to slide along the corresponding groove.

[0116] The elastic return member 140 is preferably a compression spring and is positioned between the slide 130 and the head 124 of the bearing portion. The compression spring 140 connects the slide and the head.

[0117] Preferably, the bearing portion 120 further comprises a rod 122 with one end fixed to the head 124. The slide 130 is provided with a through hole 133 through which the rod 122 passes, allowing the rod 122 to move axially. A compression spring 140 is positioned between the slide and the head, around the rod 122. This makes the movement of the head more stable.

[0118] Therefore, the fastening system 110 moves between the locked position shown in Figure 9 and the released position shown in Figure 10.

[0119] In the locked position, the head 124 is positioned in the first flat region 153. The compression spring 140 is compressed, applying pressure to the head and holding it in place against the first flat region 153.

[0120] In the released position, the head 124 is positioned away from the first flat region 153 and in the second flat region 155. The compression spring 140 is preferably more compressed in the released position than in the locked position.

[0121] The transition from the locked position to the unlocked position, and vice versa, is performed by moving the slide 130 along the groove 131.

[0122] To insert or remove the strip sandwiched between the electrode body head 124 and the first flat region 153, the fastening system 110 is moved to the release position. To do this, the operator moves the slide 130 toward the second flat region 155 in the direction of arrow A, as shown in Figures 9 and 10. This causes the head 124 of the bearing 120 to separate from the first flat region 153. This releases the soluble strip 200, which can then be removed or a new soluble strip can be installed.

[0123] Once the soluble strip is in place, the fastening system is moved to the release position to secure the end of the soluble strip to the electrode body. To do this, the operator moves the slide toward the first flat area 153 in the direction of arrow B, as shown in Figures 9 and 10. This causes the head 124 to move along the inclined surface 154 and make contact with the end 240 of the soluble strip due to the restoring effect of the compression spring 140.

[0124] For example, any type of soluble strip shown in Figure 2 may be used in the fastening system of this fourth modification.

[0125] As shown in Figure 10, in a preferred embodiment, a pin 158 is provided in the first flat region 153 of the electrode body, designed to be inserted into an opening 241 or notch 243 in the end 240 of the soluble strip 200, thereby enabling more stable fastening. Preferably, the soluble strip shown in Figures 2(a), (b), (c), or (e) is adapted to the fastening system of this fourth modified preferred embodiment.

[0126] In one embodiment, the thickness of the pin 158 may be greater than the thickness of the end 240 of the soluble strip. In this case, in the locked position, the upper part of the pin 158 is inserted into the housing 121 provided on the head 124 of the bearing section, improving stability.

[0127] However, in other embodiments of this modification, the elastic return member 140 may be a tension spring, and those skilled in the art will be able to appropriately adapt the fastening system to use such a tension spring.

[0128] [Fifth variation] According to the fifth modification of the first configuration, the fastening system 110 for each electrode 100 is a so-called "elastic band" system, as shown in Figures 11 to 14.

[0129] The bearing portion 120 of the fastening system is configured to be partially molded at the first end portion 150 to match the surface of the electrode body 102.

[0130] The elastic return member 140 of the fastening system 110 is a closed-loop elastic band. This elastic band stretches in the locked position, firmly pressing the bearing portion against the electrode body.

[0131] According to one embodiment, as shown in Figures 11 and 12, the elastic band 140, at its first end 150, laterally surrounds the entire electrode bearing portion 120 and the main body 102.

[0132] In another embodiment, as shown in Figures 13 and 14, the electrode body 102 has two lugs 156 at the first end 150, preferably arranged opposite each other. The elastic band 140 is stretched and held between the lugs 156 and overlaps the bearing portion 120.

[0133] In the release position of the fastening system (110), the bearing portion 120 is separated from the electrode body.

[0134] In one embodiment, to move the fastening system 110 to the release position, for example, an operator stretches an elastic band to pull the bearing portion 120 away from the electrode body 102. In this case, the elastic band 140 remains attached to the first end of the electrode body and stretches more in the release position than in the blocking position.

[0135] To return the fastening system 110 to the locked position, the operator releases the bearing portion 120, the restoring force of the elastic band 140 approaches the bearing portion 120, and acts on the body 102 of the electrode at the first end 150.

[0136] In another embodiment, to position the fastening system 110 in the released position, the operator removes or offsets the elastic band laterally from the first end of the electrode body relative to the bearing portion, and then removes the bearing portion 120. To position or return the fastening system 110 to the locked position, the operator first repositions the bearing portion on the electrode body, and then repositions the elastic band to surround or overlap the bearing portion.

[0137] As an example of the explanation, any type of soluble strip shown in Figure 2 may be used in the fastening system of this fifth modification.

[0138] Preferably, the electrode body 102 is provided with a pin 158 designed to be inserted into an opening 241 or notch 243 at the end 240 of the soluble strip 200, thereby enabling more stable fastening. Preferably, the soluble strip shown in Figures 2(a), (b), (c), or (e) is adapted to the fastening system of this fifth modified preferred embodiment.

[0139] In one embodiment, the thickness of the pin 158 may be greater than the thickness of the end portion 240 of the soluble strip. In this case, in the locked position, the upper part of the pin 158 is inserted into the housing 121 provided in the bearing portion 120, improving stability.

[0140] In all variations of the first configuration, the elastic return member 140 is selected by those skilled in the art such that the restoring force of the spring exerts sufficient pressure to ensure electrical contact between the soluble strip and the electrode in the locked position.

[0141] [Second Structure] According to a second configuration of the present invention, as shown in Figures 15 to 19, the fastening system 110 of each electrode 100 is intended to hold the end 240 of the soluble strip 200 within the body 102 of the electrode 100 at its first end 150.

[0142] As shown in Figure 16, the fastening system 110 is configured in a frustoconical shape, meaning that the cross-section of the fastening system 110 decreases continuously along the longitudinal axis of the fastening system from a large base 111 to a small base 112. The fastening system 110 comprises a separate first bearing section 160 and a second bearing section 170, which are joined to each other at a longitudinal joint. The first base 161 of the first bearing section 160 and the first base 171 of the second bearing section 170 form the large base 111 of the fastening system. Similarly, the second base 162 of the first bearing section 160 and the second base 172 of the second bearing section 170 form the small base 112 of the fastening system.

[0143] The end 240 of the soluble strip 200 is intended to be positioned at the longitudinal interface between the first bearing portion 160 and the second bearing portion 170, as shown in Figures 15 and 18.

[0144] According to a preferred embodiment of this second configuration, the shape of the mounting system 110 is a truncated pyramid, as shown in Figures 15 to 17. In a preferred example that is not limited, the first bearing portion 160 and the second bearing portion 170 have truncated pyramids similar in shape to the fastening system. Furthermore, the first bases 161 and 171 of the first bearing portion 160 and the second bearing portion 170 are preferably large bases.

[0145] According to another preferred embodiment of this second configuration, the shape of the fastening system 110 is frustoconical, as shown in Figures 18 and 19.

[0146] The body 102 of the electrode 100 is provided with a transversely oriented orifice 157 at its first end 150, which may penetrate as needed. The orifice 157 is for receiving a fastening system 110 equipped with a soluble strip.

[0147] The orifice 157 has a shape that complements the shape of the fastening system 110. By precisely adjusting the fastening system 110 and the orifice 157, pressure contact between the soluble strip 200 and the fastening system 110 can be ensured. The fastening system 110 of the electrode 100 is made of a conductive material to ensure electrical contact between the soluble strip 200 and the body 102 of the electrode.

[0148] The electrode body 102 further has an opening 103 on its first surface 104 that is connected to an orifice 157, so that the soluble strip 200 can pass through the first surface and the soluble strip can be placed between the two electrodes.

[0149] As an example of the explanation, any type of soluble strip shown in Figure 2 may be used in the fastening system of this second configuration.

[0150] In the locked position, the fastening system 110 is inserted into the orifice 157 of the electrode body. Preferably, the electrode body 102 includes a stopper (not shown) for fixing the fastening system 110 in the locked position.

[0151] In the release position, the fastening system 110 detaches from the orifice 157 and separates from the electrode body.

[0152] For each molding cycle using the EHF method, the operator pre-prepares an assembly consisting of a soluble strip 200 and two fastening systems 110. To prepare the assembly, the operator separates the two bearing sections 160 and 170 of each fastening system 100, places each end 240 of the soluble strip 200 into the respective fastening system, and reassembles the two bearing sections.

[0153] To attach the assembly to the two electrodes, the operator inserts each fastening system 110 into the orifice 157 of each electrode 100, and then inserts each fastening system through the small base 112. In this way, the fastening system 110 is in the locked position.

[0154] Once the discharge occurs, the assembly is removed and a new assembly is installed.

[0155] After removing the assembly, the operator separates the two bearing sections of each fastening system and removes any remaining soluble strips. The fastening system can be reused, and a new assembly with new soluble strips can be prepared.

[0156] Preferably, the first bearing portion 160 includes a pin 164 designed to cooperate with the complementary housing 173 of the second bearing portion 170 in the locked position, as shown in Figures 17 and 19. In this case, the end 240 of the soluble strip 200 preferably includes an orifice 241 or notch 243 for receiving the pin 164 of the first bearing portion 160. As an example for explanation, the strip shown in Figures 2(a), (b), (c), or (e) is adapted to the fastening system of this preferred embodiment of the second configuration. [Explanation of Symbols]

[0157] 100 electrodes 101 Recess 102 Main Unit 103 Opening 104 First side 110 Fastening systems, mounting systems 111, 112 base 120, 160, 170 bearing part 120 Lever 121 Housing 122 Rods 124 heads 126 nuts 127 Notches 130 slides 131 Groove 132 Arm 133 Passing hole 140 Elastic bands, compression springs 141, 150 First end 142, 150 Second end 151 Guide hole 152 Spiral ramp 153 First flat region 154, 155 Second flat region 154 Slope 156 protrusions, lugs 157 Orifice 158 pins 161, 171 First Bass 162, 172 Second Bass 164 pins 173 Complementary Housing 200 soluble parts, soluble strips, 220 Main Unit 240 End 241 Opening 241 Orifice 243 Notches 300 Electro-hydraulic molding chambers, electro-hydraulic molding enclosures 310 Discharge Chamber 320 discharge flame 322 Interior wall 330 Molding Chamber 340 molds 600 parts

Claims

1. - The main body (102) including the first end (150), - A fastening system (110) is configured to hold the first end (150) of the electrode (100) to or within the body (102) of the electrode (100) by compression locking, An electrode (100) for an electro-hydraulic molding enclosure (300) comprising, The fastening system (110) moves between the released position and the locked position, - The release position of the fastening system (110) is intended to allow positioning and removal of the end (240) of the soluble strip (200), - The locking position of the fastening system (110) is intended to allow electrical contact between the end (240) of the soluble strip (200) and the body of the electrode (100). The fastening system (110) is - A bearing portion (120) is intended to be in contact with the end portion (240) of the soluble strip (200) of the head (124), - An elastic return member connected to the bearing portion (120), wherein, in the locked position of the fastening system (110), the first end portion (150) is configured to exert a restoring force on the bearing portion (120) relative to the body (102) of the electrode (100), and An electrode (100) characterized by having the following features.

2. The electrode (100) according to claim 1, wherein the elastic return member (140) is selected from a compression spring, a tension spring, a torsion spring, and an elastic band.

3. - The bearing portion (120) includes a rod (122) connected to the head (124), - The body (102) of the electrode includes a through guide hole (151) at the first end (150) for receiving the rod (122), - The electrode (100) according to claim 1 or 2, wherein the elastic return member (140) is a compression spring or a tension spring, and the coil is wound around the rod (122).

4. - The first end (141) of the elastic return member (140) is connected to the bearing portion (120), - The electrode (100) according to claim 3, wherein the second end (142) of the elastic return member (140) is intended to be connected to the frame (320) of the electrohydraulic molded enclosure (300).

5. - The end of the rod (122) of the bearing portion (120) is connected to the head (124), - The other end of the rod (122) includes a nut (126), - The body (102) of the electrode is positioned between the head (124) and the nut (126). - The electrode (100) according to claim 3, wherein the elastic return member (140) is positioned around the rod between the body (102) of the electrode and the nut (126).

6. The aforementioned main body (102) is - The first flat region (153), - A pair of spiral ramps (152) arranged around the guide hole (151) on the first flat region, wherein the head (124) of the bearing portion (120) moves between the upper and lower parts of the spiral ramps (152) when the bearing portion (120) rotates about the longitudinal axis of the rod (122), Equipped with, The electrode in question is, - In the release position of the fastening system (110), the head (124) of the bearing portion (120) is located on the upper part of the spiral ramp (152). - The electrode (100) according to claim 5, wherein in the locked position of the fastening system (110), the head (124) is positioned at the lower part of the spiral ramp (152).

7. The electrode (100) according to claim 1 or 2, wherein the elastic return member (140) is a torsion spring, the first end (141) of which is connected to the bearing portion (120), and the second end (142) of which is connected to the body (102) of the electrode (100), and in the locked position of the fastening system (110), the electrode is configured such that the torsion spring is compressed.

8. The aforementioned main body (102) is - A longitudinal groove (131) provided in the main body (102), - A slide (130) having an arm (132) inserted into a groove (131), the slide (130) configured to slide along the groove (131), - Two flat regions, called a first flat region and a second flat region, separated by an inclined surface (154) on the body of the electrode, wherein the first flat region (153) is intended to receive the end (240) of the soluble strip (200), Equipped with, The bearing portion (120) is connected to the slide (130) such that when the arm (132) of the slide (130) moves within the groove (131), the head (124) of the bearing portion moves between the first flat region (153) and the second flat region (154). The elastic return member (140) is a compression spring or a tension spring, with its first end (141) connected to the bearing portion (120) and its second end (142) connected to the bearing portion (120). - In the release position of the fastening system (110), the head (124) of the bearing portion (120) is located in the second flat region (154). - In the locked position of the fastening system (110), the head (124) is positioned in the first flat region (153). The electrode (100) according to claim 1 or 2, connected to the slide (130).

9. The electrode (100) according to claim 1 or 2, wherein the elastic return member (140) is an elastic band, and the fastening system (110) is configured such that, in the locked position, the elastic band laterally surrounds the bearing portion (120) and the main body (102) of the electrode (100) at the first end (150).

10. The electrode (100) according to claim 1 or 2, wherein the elastic return member (140) is an elastic band, the body (102) of the electrode has two protrusions (156), and the fastening system (110) is configured such that, in the locked position, the elastic band (140) is held by the protrusions and overlaps with the bearing portion (120).

11. An electrohydraulic molding enclosure (300) comprising a discharge frame (320) including an inner wall (322) that partitions a discharge chamber (310), An electrohydraulic molding enclosure (300) comprising at least two electrodes (100) as described in any one of claims 1 to 10, wherein the at least two electrodes are facing each other, partially located within the discharge chamber, and intended to be connected to each other via a soluble strip (200).

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