Continuous production die for reducing special-shaped nuts

Abstract

The invention relates to the technical field of dies, and discloses a variable-diameter special-shaped nut continuous production die which comprises an upper die, an ejector plate, a female die plate, a material returning plate, a male die plate and a base, the male die plate is installed on the base, the male die plate is movably sleeved with the material returning plate, the ejector plate and the female die plate are sequentially installed on the lower surface of the upper die, and the ejector plate is installed on the lower surface of the upper die. A stamping assembly is installed on the male die plate, a sleeving hole corresponding to the stamping assembly is formed in the upper surface of the material returning plate and used for being movably installed on the male die plate, a pressed groove hole is formed in the position, corresponding to the stamping assembly, of the female die plate, and a material returning ejector pin is installed on the position, corresponding to the pressed groove hole, of the lower surface of the ejector pin plate through an embedded spring. The upper die and the base are fastened through a long screw to form a complete die. Fastening connection of the upper die body, the ejector plate and the female die plate is guaranteed through the short screws, the upper die body and the stripper plate are accurately aligned through the positioning pins, the upper die is connected with the base through the threaded nails, and the die can be rapidly and accurately installed in place.

Description

Technical Field

[0001] The invention relates to the technical field of moulds, and in particular to a continuous production mould for variable diameter special-shaped nuts. Background Art

[0002] Disc T-nuts are an economical connection method. They are mainly made of carbon steel and stainless steel. They are suitable for fastening iron frames to other parts, including wood, plastic, particle board, medium density board, or connecting two wooden parts. The four-corner disc T-nuts can be used to connect hardwood and softwood, and can also be used on wooden furniture;

[0003] Currently, disc T-nuts are made using a stamping process. Each stamped part starts from a disc and needs to go through 30 steps to complete the final product. The process is cumbersome and time-consuming, and a large number of stamping machines are required, which affects production efficiency.

[0004] The existing stacking mold has the following problems: 1. When the stacking mold is used to produce multi-layer products, the multi-layer mold needs to be installed. The stacking of the multi-layer mold is time-consuming and prone to inaccurate positioning, which makes the multi-layer products produced by the stacking mold not meet the standards; 2. When the stacking mold is used to produce products, it is easy to stack too many layers. When the product material is filled, the lower layer of the shaping groove is not fully filled due to the large amount of gas inside, so the produced product does not meet the standards, and the existing production efficiency is slow. Therefore, in response to the above problems, a continuous production mold for variable diameter special-shaped nuts is proposed. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings existing in the prior art, and to propose a continuous production mold for variable diameter special-shaped nuts, aiming to improve the problems in the prior art that the mold cannot be effectively installed quickly and accurately, and the production efficiency is slow.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The invention relates to a continuous production mold for variable diameter special-shaped nuts, comprising an upper mold, an ejector plate, a concave mold plate, a stripping plate, a male mold plate and a base, wherein the male mold plate is installed on the base, and the stripping plate is movably sleeved on the male mold plate, and the ejector plate and the concave mold plate are sequentially installed on the lower surface of the upper mold, and a stamping component is installed on the male mold plate, and the stripping plate is provided with a sleeve hole corresponding to the stamping component on the upper surface thereof, and is used for being movably installed on the male mold plate, and a pressure slot hole is provided on the corresponding stamping component on the concave mold plate, and a stripping ejector is installed on the lower surface of the ejector plate corresponding to the position of the pressure slot hole through an embedded spring, and the upper mold and the base are fastened by long screws to realize a complete mold, and when the mold is produced, the raw material plate is positioned from one side to enter between the male mold plate and the concave mold plate, and the stamping action is completed by moving the stamping component on the male mold plate to the pressure slot hole component of the concave mold plate, and the stripping ejector and the stripping plate of the ejector plate are cooperated to realize directional stripping, which is convenient for continuous forward stamping production of the raw material plate, and finally a complete special-shaped nut body is continuously stamped out.

[0008] Moreover, the upper mold includes an upper mold body, which is in the shape of a long strip plate, and a fixing assembly is arranged on the top of the upper mold body, and the fixing assembly includes a plurality of mounting grooves 1 and a plurality of mounting grooves 2, the mounting grooves 1 are evenly distributed on the upper surface of the upper mold body, and the outside of the mounting grooves 1 is opened on the top of the upper mold body, and the internal threads of the mounting grooves 1 are connected with short screws, and the short screws are screwed into the mounting grooves 1 to firmly fix the upper mold body, the ejector plate and the concave template into a whole, and the internal threads of the concave template are connected with a plurality of positioning pins, and the positioning pins are inserted into the corresponding holes of the stripping plate to achieve limited docking during installation; the outside of the mounting grooves 2 is opened on the inside of the upper mold body, and the internal threads of the mounting grooves 2 are connected with long screws, and the external threads of the long screws are connected to the inside of the upper mold body; the base includes a lower mold body, and a connecting plate is installed on the lower mold body, and a convex template is arranged on the connecting plate, and positioning threaded holes are arranged at the four corners of the lower mold body, and the long screws are connected with the positioning threaded holes to realize the positioning between the layers of templates and the connection and fixation of the entire device.

[0009] Moreover, a cooling component for water transport is arranged inside the concave template, and the cooling component includes a plurality of water holes, which are evenly distributed inside the concave template to form an efficient water flow channel. The outside of the water holes is opened inside the concave template, and the internal threads of the water holes are connected with threaded interfaces.

[0010] Moreover, the convex template includes a support plate and a punching assembly, a punching assembly is installed in the middle of the support plate, and positioning and fixing columns are symmetrically formed on both sides of the punching assembly. The lower part of the punching assembly is connected to an upward punching drive device, and the punching assembly includes three groups of punching needles. The first group of punching needles, the second group of punching needles and the third group of punching needles are respectively arranged in the direction from the raw material plate to the exit. The first group of punching needles includes a plurality of punching needles 1, and the punching needle 1 is cylindrical, and arc-shaped grooves are formed at the four corners of its top, and the plurality of punching needles 1 are arranged at intervals, and the diameters decrease and the heights increase with each other. When the punching needle 1 punches the raw material plate, the raw material plate is initially Deformation; the second group of punching needles includes multiple punching needles 2, which are cylindrical, and the diameters of the multiple punching needles 2 decrease and the heights increase, gradually shaping the raw material plate to punch out a cylindrical protrusion; the third group of punching needles includes multiple punching needles 3, and the multiple punching needles 3 close to the punching needle 2 are breaking columns, which are cylindrical, with an arc chamfer on the top, and the height of the breaking column is higher than the punching needle 2, which pierces the top of the cylindrical protrusion, and the middle punching needle 3 is a cylindrical widening column, the diameter of the cylindrical widening column is larger than the breaking column, and the height becomes shorter and the diameter becomes thicker, so as to realize the expansion of the pipe mouth, and the multiple punching needles 3 away from the punching needle 2 are cylindrical, with decreasing diameters and increasing heights, completing the stamping of the complete part.

[0011] Moreover, a material throwing assembly for discharge is installed inside the concave template, and the position of the material throwing assembly corresponds to the position of the ejection column in the third group of punching needles. The material throwing assembly includes a waste discharge port 1, a waste discharge port 3 is opened in the middle of the ejector plate, and a waste discharge port 2 is opened inside the upper mold body. Waste discharge port 2 cooperates with waste discharge port 3 and waste discharge port 1 to form a complete waste discharge channel.

[0012] Furthermore, two ejection cylinders are fixedly connected to the top of one side of the support plate, which are used to assist in ejecting the product from the mold after the product is formed.

[0013] The advantages and positive effects of the present invention are:

[0014] 1. In the present invention, short screws are used to ensure that the upper mold body, the ejector plate and the concave mold plate are firmly connected, the positioning pins allow the concave mold plate to be accurately aligned with the stripper plate, and the long screws enhance the firmness of the connection between the multiple mold parts. This split-piece design avoids the problems of a lot of time spent on the installation of traditional stacked molds and inaccurate positioning, and enables the mold to be installed quickly and accurately, providing a reliable mold foundation for the production of standard variable diameter special-shaped nuts, which helps to improve the dimensional accuracy and quality stability of the product.

[0015] 2. In the present invention, when the concave mold plate and the gasket plate are producing products, due to the use of a split-piece design, compared with the traditional stacked mold, which is prone to internal gas being difficult to discharge due to the high number of stacked layers, resulting in the inability to fully fill the lower layer of the shaped groove, this mold has a better response mechanism. The reasonable connection and layout between the mold pieces ensure that when the material enters the cavity, the air can have a relatively smooth discharge channel and will not accumulate in large quantities inside the mold.

[0016] 3. This device cooperates with positioning, stamping and material stripping. The raw material plate is positioned at a fixed point on one side and enters between the male plate and the female plate. The stamping action is completed by the movement of the stamping component on the male plate toward the pressure slot component on the female plate. The ejector pin and the ejector plate of the ejector plate are used to realize directional material stripping, which is convenient for the continuous forward stamping production of the raw material plate. Finally, a complete special-shaped nut body is stamped out. This continuous production method greatly improves the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of a continuous production mold for variable diameter special-shaped nuts of the present invention;

[0018] Figure 2 It is an exploded view of the stripper plate structure of the continuous production die of the variable diameter special-shaped nuts of the present invention;

[0019] Figure 3 It is a schematic diagram of the support plate structure of the continuous production mold of variable diameter special-shaped nuts of the present invention;

[0020] Figure 4 It is a schematic structural diagram of a raw material plate of a continuous production mold for variable diameter special-shaped nuts of the present invention;

[0021] Figure 5 for Figure 2 Enlarged view of point A in the middle;

[0022] Figure 6 It is a schematic diagram of the special-shaped nut body structure of the continuous production mold of the variable-diameter special-shaped nuts of the present invention.

[0023] Legend:

[0024] 1. Upper mold body; 2. Mounting slot 1; 3. Short screw; 4. Concave template; 5. Positioning pin; 6. Material stripping plate; 7. Fitting hole; 8. Water hole; 9. Threaded interface; 10. Mounting slot 2; 11. Long screw; 12. Lower mold body; 13. Connecting plate; 14. Support plate; 15. Positioning and fixing column; 16. Waste discharge port 1; 17. Waste discharge port 2; 18. Punch pin 1; 19. Ejector pin 2; 20. Ejector column; 21. Ejector tube; 22. Raw material plate; 23. Positioning point hole; 24. Special-shaped nut body; 25. Ejector plate. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and through specific embodiments. The following embodiments are only illustrative and not restrictive, and the protection scope of the present invention cannot be limited thereto.

[0026] Reference Figure 1 and Figure 5 , Figure 6 As shown,

[0027] An embodiment provided by the present invention:

[0028] A continuous production mold for variable diameter special-shaped nuts, the mold is used to produce special-shaped nut bodies 24, the mold includes an upper mold, an ejector plate 25, a concave mold plate 4, a stripper plate 6, a convex mold plate 14 and a base, the base is equipped with a convex mold plate, the convex mold plate is movably sleeved with a stripper plate, the lower surface of the upper mold is fixed with an ejector plate, the concave mold plate is arranged between the ejector plate and the convex mold plate, a stamping assembly is installed on the convex mold plate, the stripper plate is a gasket plate, and a sleeve hole 7 corresponding to the stamping assembly is formed on its upper surface, It is used to be movably installed on the convex mold plate, and the corresponding stamping component is provided with a pressure slot hole on the concave mold plate. The lower surface of the ejector plate corresponding to the position of the pressure slot hole is installed with a stripping ejector through an embedded spring. When the mold is in production, the raw material plate is positioned from one side to enter between the convex mold plate and the concave mold plate, and the stamping action is completed by the stamping component on the convex mold plate moving toward the pressure slot hole component of the concave mold plate, and the stripping ejector and the stripping plate of the ejector plate are used to realize directional stripping, which is convenient for the continuous forward stamping production of the raw material plate, and finally a complete special-shaped nut body is stamped out.

[0029] The upper mold comprises an upper mold body, wherein the upper mold body 1 is in the shape of a long strip plate, and a fixing assembly is arranged on the top of the upper mold body 1, and the fixing assembly comprises a plurality of fixing grooves 1 2 and a plurality of fixing grooves 2 10, and the fixing grooves 1 2 are evenly distributed on the upper surface of the upper mold body 1, and provide installation space for the installation of short screws 3, and the outside of the fixing grooves 1 2 is opened on the top of the upper mold body 1, and the internal threads of the fixing grooves 1 2 are connected with short screws 3, and the short screws 3 can be tightly engaged after being screwed into the fixing grooves 1 2, so as to firmly fix the upper mold body, the ejector plate and the concave mold plate 4 into a whole, and the concave mold plate 4 can assist the convex mold plate in completing the stamping action during the working process of the mold, and the internal threads of the concave mold plate 4 are connected with a plurality of positioning pins 5, and the positioning pins 5 are accurately inserted into the corresponding holes of the stripping plate 6 to achieve docking, and the bottom thread of the connecting assembly is connected with the stripping plate 6, and the stripping plate 6 can also effectively protect the inside of the mold, and cooperate with the ejector plate to complete the ejection operation;

[0030] The second mounting groove 10 provides a precise mounting position for the long screw 11. The outside of the second mounting groove 10 is opened inside the upper mold body 1. The internal thread of the second mounting groove 10 is connected with the long screw 11. The external thread of the long screw 11 is connected to the inside of the upper mold body 1. The base includes a lower mold body 12. A connecting plate 13 is installed on the lower mold body. A convex mold plate is arranged on the connecting plate. Positioning threaded holes are arranged at the four corners of the lower mold body. The long screw 11 is connected to the positioning threaded holes to realize the positioning between the layers of the molds and the connection and fixation of the entire device.

[0031] In the specific implementation of the present invention, in order to better allow the raw material plate to be formed and then continuously stamped, a cooling component for water supply is arranged inside the concave template, and the cooling component includes a plurality of water holes 8, and the water holes 8 are evenly distributed inside the concave template 4 to form an efficient water flow channel. The outside of the water holes 8 is opened inside the concave template 4, and the internal threads of the water holes 8 are connected with threaded interfaces 9. The threads of the threaded interfaces 9 are well sealed with the water holes 8. When connecting the water pipe, it can ensure that the cooling water will not leak and stably flow into the water holes 8 to achieve cooling of the mold.

[0032] The convex mold plate includes a support plate and a punching assembly, a punching assembly is installed in the middle of the support plate, and positioning and fixing columns 15 are symmetrically formed on both sides of the punching assembly to facilitate the positioning and fixing operation of the raw material plate, so as to better perform continuous punching production. The lower part of the punching assembly is connected to an upward punching drive device, and the punching assembly includes three groups of punching needles. A first group of punching needles, a second group of punching needles and a third group of punching needles are respectively arranged in the direction from the raw material plate to the exit. The first group of punching needles includes a plurality of punching needles 1, which are cylindrical, and arc-shaped grooves are formed at the four corners of the top thereof. A plurality of punching needles 18 are arranged at intervals, and are in a state of decreasing diameter and increasing height with respect to each other. When punching the raw material plate 22, the punching needle 18 can apply pressure to cause the raw material plate 22 to deform initially. In a specific implementation, the diameter of the punching needle 18 is initially 2c m, and then gradually tapers to 1.8cm, 1.5cm, the second group of punches includes a plurality of punches 2 19, the punches 2 are cylindrical, and the diameters of the plurality of punches 2 decrease and the heights increase, gradually shaping the raw material plate 22 into a cylindrical protrusion by punching; the third group of punches includes a plurality of punches 3, the structures of the plurality of punches 3 close to the punches 2 are all piercing columns 20, which are cylindrical, with an arc chamfered top, and the height of the piercing column is higher than the punches 2, so as to pierce the raw material plate, the punches 3 in the middle are cylindrical widening columns, the diameter of the cylindrical widening columns is larger than the piercing column 20, and the height becomes shorter and the diameter becomes thicker, so as to realize the expansion of the pipe mouth, the plurality of punches 3 away from the punches 2 are cylindrical, with decreasing diameters and increasing heights, and can accurately punch the raw material plate 22 into a specific shape, so that it forms the elongated column part required for the body of the variable diameter special-shaped nut;

[0033] Reference Figures 2 to 4As shown, a material throwing assembly for discharge is installed inside the concave template 4, and the position of the material throwing assembly is matched with the position of the ejection column in the third group of punching needles, so as to facilitate the ejection of waste after the raw material plate is ejected, and the material throwing assembly includes a waste discharge port 16, and the waste discharge port 1 allows the waste to be discharged, and the outside of the waste discharge port 1 is opened inside the concave template 4, and the middle part of the ejector plate 25 is provided with a waste discharge port 3, and the interior of the upper mold body 1 is provided with a waste discharge port 27, and the waste discharge port 27 cooperates with the waste discharge port 3 and the waste discharge port 16 to form a complete waste discharge channel, so as to ensure that the waste will not accumulate in the mold and affect the production;

[0034] Two ejector tubes 21 are fixedly connected to the top of one side of the support plate 14. After the product is formed, the ejector tube 21 can assist in ejecting the product from the mold. A raw material plate 22 is arranged on the top of the stripper plate. The raw material plate 22 can be gradually deformed into a variable diameter special-shaped nut body under the stamping of the mold. The setting of the fixed-point positioning column can play a positioning role during the working process of the mold, making the stamping more precise.

[0035] Working principle: Upper part: After the short screw 3 is screwed into the installation slot 2, it can be tightly engaged to firmly fix the upper mold body, ejector plate and concave mold plate 4 into a whole. The precise positioning function of the positioning pin 5 enables the concave mold plate 4 and the stripper plate 6 to be accurately aligned during assembly to avoid installation position deviation. The lower mold body 12 is connected by locking screws, and the long screws 11 are further connected to enhance the firmness of the connection between these mold parts to form a stable whole. Compared with traditional stacked molds, this split-piece design avoids the problem of time-consuming and inaccurate positioning when stacking multiple layers of molds. Each mold component can be quickly and accurately installed in place through a specific connection method, laying the foundation for the subsequent production of variable-diameter special-shaped nuts that meet standards;

[0036] Then, when producing the body of the variable diameter special-shaped nut, first place the raw material plate 22 on one side of the stripping plate 6, and then let the positioning and fixing point columns 15 on the support plate position and limit the raw material plate, form positioning point holes 23 on the original plate, and pull the raw material plate 22 forward through the traction device, lift the stamping assembly to stamp the raw material plate 22 multiple times, when the raw material plate passes through the first group of punches of the stamping assembly respectively, the initial stamping forms a disc on the raw material plate 22 entering the mold, and then the raw material plate enters the second group of punches, and multiple ejector pins 2 19 perform secondary stamping on the raw material plate 22, so that the cylindrical protrusion in the middle of the raw material plate 22 enters the third group of punches, and the breaking column pushes through the cylindrical protrusion disc, and the waste disc is discharged from the ejection assembly to the mold, and passes through the expansion column to realize the expansion of the pipe mouth, and the multiple punches three away from the punch pins 2 are cylindrical, with decreasing diameters and increasing heights, and are stamped again, and then the shape production of the variable diameter special-shaped nut is completed.

[0037] During product production, due to the use of a split-piece design, this mold has a better response mechanism compared to the traditional stacked mold, which is prone to internal gas being difficult to discharge due to the high number of stacked layers, resulting in insufficient filling of the lower layer of the molding groove. The reasonable connection and layout between the mold pieces ensure that when the material enters the cavity, the air can have a relatively smooth discharge channel and will not accumulate in large quantities inside the mold;

[0038] In order to solve the problem of poor cooling effect of the mold, water holes 8 are respectively set inside the concave mold plate 4. The inlet and outlet of the water hole 8 are provided with a threaded interface 9, and a water pipe can be connected to the threaded interface 9 during the production process. When the temperature of the mold rises due to long-term operation, cooling water flows into the water hole 8 through the water pipe, and the water circulates along the water hole 8, taking away the heat generated inside the mold during the product molding process, effectively cooling the mold, maintaining the mold within a suitable working temperature range, and thus ensuring that the variable diameter special-shaped nuts can be continuously produced under a stable mold environment, thereby improving the molding quality and production efficiency of the product.

[0039] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A continuous production die for variable diameter special-shaped nuts, characterized by: The cam plate is provided with a plurality of stripping plates, each of which is provided with a plurality of stripping plates, each of which is provided with a plurality of stripping plates, each of which is provided with a plurality of stripping plates.

2. The continuous production mold for variable diameter special-shaped nuts according to claim 1 is characterized in that: The upper mold comprises an upper mold body, which is in the shape of a long strip plate, and a fixing assembly is arranged on the top of the upper mold body, and the fixing assembly comprises a plurality of mounting grooves 1 and a plurality of mounting grooves 2, the mounting grooves 1 are evenly distributed on the upper surface of the upper mold body, and the outside of the mounting grooves 1 is arranged on the top of the upper mold body, and the internal threads of the mounting grooves 1 are connected with short screws, and the short screws are screwed into the mounting grooves 1 to firmly fix the upper mold body, the ejector plate and the concave template into a whole, and the internal threads of the concave template are connected with a plurality of positioning pins, and the positioning pins are inserted into the corresponding holes of the stripping plate to realize the limited docking during installation; the outside of the mounting grooves 2 is arranged on the inside of the upper mold body, and the internal threads of the mounting grooves 2 are connected with long screws, and the external threads of the long screws are connected to the inside of the upper mold body; the base comprises a lower mold body, and a connecting plate is installed on the lower mold body, and a convex template is arranged on the connecting plate, and positioning threaded holes are arranged at the four corners of the lower mold body, and the long screws are connected with the positioning threaded holes to realize the positioning between the layers of templates and the connection and fixation of the entire device.

3. The continuous production mold for variable diameter special-shaped nuts according to claim 1 is characterized in that: A cooling component for conveying water is arranged inside the concave template, and the cooling component includes a plurality of water holes, which are evenly distributed inside the concave template to form an efficient water flow channel, and the outside of the water holes is opened inside the concave template, and the internal threads of the water holes are connected with threaded interfaces.

4. The continuous production mold for variable diameter special-shaped nuts according to claim 1, characterized in that: The convex mold plate includes a support plate and a punching assembly, a punching assembly is installed in the middle of the support plate, and positioning and fixing columns are symmetrically formed on both sides of the punching assembly. The lower part of the punching assembly is connected to an upward punching drive device. The punching assembly includes three groups of punching needles. The first group of punching needles, the second group of punching needles and the third group of punching needles are respectively arranged in the direction from the raw material plate to the exit. The first group of punching needles includes a plurality of punching needles 1, and the punching needle 1 is cylindrical, and arc grooves are formed at the four corners of its top. The plurality of punching needles 1 are arranged at intervals, and the diameters decrease and the heights increase with each other. When the punching needle 1 punches the raw material plate, the raw material plate is initially deformed. ; The second group of punching needles includes multiple punching needles 2, which are cylindrical, and the diameters of the multiple punching needles 2 decrease and the heights increase, gradually shaping the raw material plate to punch out a cylindrical protrusion; the third group of punching needles includes multiple punching needles 3, and the multiple punching needles 3 close to the punching needle 2 are breaking columns, which are cylindrical, with an arc chamfer on the top, and the height of the breaking column is higher than the punching needle 2, which pierces the top of the cylindrical protrusion, and the middle punching needle 3 is a cylindrical widening column, the diameter of the cylindrical widening column is larger than the breaking column, and the height becomes shorter and the diameter becomes thicker, so as to realize the expansion of the pipe mouth, and the multiple punching needles 3 away from the punching needle 2 are cylindrical, with decreasing diameters and increasing heights, completing the stamping of the complete part.

5. The continuous production mold for variable diameter special-shaped nuts according to claim 1, characterized in that: A material throwing assembly for discharge is installed inside the concave template, and the position of the material throwing assembly corresponds to the position of the ejection column in the third group of punching needles. The material throwing assembly includes a waste discharge port 1, a waste discharge port 3 is opened in the middle of the ejector plate, and a waste discharge port 2 is opened inside the upper mold body. The waste discharge port 2 cooperates with the waste discharge port 3 and the waste discharge port 1 to form a complete waste discharge channel.

6. The continuous production mold for variable diameter special-shaped nuts according to claim 4, characterized in that: Two ejection cylinders are fixedly connected to the top of one side of the support plate, and are used to assist in ejecting the product from the mold after the product is formed.

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