A special-shaped vacuum vessel traceless hydraulic forming device and forming process

Abstract

The present application relates to the technical field of vacuum vessel forming equipment, and particularly relates to a special-shaped vacuum vessel traceless hydraulic forming device and a forming process, which comprises a first die mechanism, the first die mechanism comprises a first die base, a first die unit and a first core rod, the first die unit is assembled on the first die base, the first die unit comprises a first die sleeve and a first forming unit, the first die sleeve is assembled on the first die base, the first forming unit is slidingly arranged on the first die sleeve and is used for printing a pattern on the surface of a shell of a vacuum vessel, and the first core rod is arranged in the first die sleeve and is used for providing a flow channel of a liquid medium for the first die unit. The purpose is to enable a cup body to obtain a special-shaped cup body and a cup body pattern at the same time during forming, improve the appearance surface quality of the cup body, and enable the outer surface of the cup body to be as free of printing marks as possible.

Description

Technical Field

[0001] This invention relates to the field of vacuum vessel forming equipment technology, and in particular to a non-marking hydraulic forming device and forming process for irregularly shaped vacuum vessels. Background Technology

[0002] In the processing of products such as thermos cups and kettles, the cup body needs to be shaped. Water expansion forming technology has always been one of the important technologies in the stainless steel thermos cup and kettle industry. By applying water pressure to the tubular blank in a specific space, the blank is deformed to achieve the desired shape. After the water expansion process is completed, the upper and lower molds are separated so that the formed blank can be taken out.

[0003] Currently, insulated cups and kettles have evolved from simple drinking containers to works of art, with increasingly complex shapes and higher surface quality. For example, they may have irregular shapes or various patterns on their exterior. Traditionally, irregular shapes are often achieved using two- or three-part molds. However, these molds inevitably have mold marks and dimensional inaccuracies, increasing the difficulty of mold making and maintenance. This can significantly reduce the lifespan of the molds, increase the workload for operators, and impact production efficiency. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a non-marking hydraulic forming device and forming process for irregularly shaped vacuum vessels, so that irregularly shaped cups and cup patterns can be obtained simultaneously during the forming process, thereby improving the surface quality of the cup and making the outer surface of the cup as free of marks as possible.

[0005] The present invention solves the above-mentioned technical problems through the following technical means:

[0006] A non-marking hydroforming device for irregularly shaped vacuum vessels includes a first mold mechanism. The first mold mechanism includes a first mold base, a first model unit, and a first mandrel. The first model unit is assembled on the first mold base and includes a first mold sleeve and a first forming unit. The first mold sleeve is assembled on the first mold base, and the first forming unit is slidably disposed on the first mold sleeve for printing patterns on the surface of the outer shell of the vacuum vessel. The first mandrel is disposed inside the first mold sleeve for providing a flow channel for the liquid medium to the first model unit.

[0007] Based on the above scheme, this application also makes the following optimizations:

[0008] Furthermore, it also includes a second mold mechanism, which is symmetrically arranged on the first mold mechanism and communicates with the first mold mechanism to cooperate with the first mold mechanism to simultaneously form the outer shells of the two vacuum vessels;

[0009] The second mold mechanism includes a second mold base, a second model unit, and a second mandrel. The second model unit is assembled on the second mold base. The second model unit includes a second mold sleeve and a second molding unit. One end of the second mold sleeve is assembled on the second mold base, and the other end abuts against the first mold sleeve. The second molding unit is slidably disposed on the second mold sleeve and is used to print patterns on the surface of the outer shell of the vacuum vessel. The second mandrel is disposed inside the second mold sleeve and is used to provide a flow channel for the liquid medium for the second model unit.

[0010] Furthermore, the first mold base and the second mold base have the same structure. The first mold base includes a mounting platform, a connector, and a mounting seat. The mounting seat is mounted on one side of the mounting platform through the connector. The mounting platform has an injection port, and the mounting seat has an installation groove. The injection port communicates with the installation groove. The first mandrel is mounted on the installation groove and partially penetrates the first mold sleeve.

[0011] Furthermore, the first and second core rods have the same structure. The first core rod includes a core seat, a connecting seat, and a hollow rod body. One end of the connecting seat is fixedly connected to the core seat, and the other end is fixedly connected to the hollow rod body. The core seat, the connecting seat, and the hollow rod body are interconnected. A step is formed at the connection between the connecting seat and the core seat to position the outer shell of the vacuum vessel.

[0012] Furthermore, the hollow rod body has several through holes.

[0013] Furthermore, the first mold sleeve and the second mold sleeve have the same structure. The first mold sleeve includes a sleeve and a support assembly. The sleeve is assembled on the first mold base. At least two through slots are symmetrically opened on the sleeve. The support assembly is slidably installed in the two through slots respectively.

[0014] Furthermore, the support assembly includes a support rod, a reset member, and a support block. Accommodating slots are respectively provided on both sides of the through groove. The support rod is symmetrically installed in the two accommodating slots. The support block is slidably installed on the two support rods. One end of the reset member is located at the bottom of the through groove, and the other end is connected to the bottom of the support block.

[0015] Furthermore, the first molding unit and the second molding unit have the same structure. The first molding unit includes a first driving member, a second driving member, and at least two pattern blocks. The two pattern blocks are slidably disposed on the first mold sleeve and are symmetrically arranged. The first driving member and the second driving member are respectively drivenly connected to each pattern block.

[0016] Furthermore, the first driving component includes a first transmission rod and a second transmission rod. A fixing block is fixedly connected to one side of the pattern block, and an extension plate is fixedly connected to the fixing block. One end of the first transmission rod and the second transmission rod are both connected to the extension plate. An installation block is fixedly provided on the extension plate. A sliding rod is provided between the installation block and the first transmission rod and the second transmission rod, respectively. A spring is sleeved on the sliding rod.

[0017] The second driving component includes a third driving rod, a wedge block is provided on the fixed block, one end of the third driving rod is connected to the wedge block, and is used to drive the fixed block and the pattern block to move axially, and a retaining sleeve is provided on the pattern block.

[0018] This application also discloses a process for seamless hydroforming of irregularly shaped vacuum vessels as described above, comprising the following steps:

[0019] S1. Place the tube inside the first mold sleeve and outside the first mandrel, and then place the bottom of the first mold sleeve against the worktable;

[0020] S2. Control the axial distance of the first molding unit on the first mold sleeve according to the pattern depth on the outer shell surface of the vacuum vessel;

[0021] S3. A fluid medium is delivered into the first mandrel through the first mold base, so that the fluid medium is injected between the mandrel and the tube, causing the tube to expand. During the expansion of the tube, it comes into contact with the first molding unit and forms a pattern on the surface of the tube.

[0022] S4. After the pattern is formed, the fluid medium is extracted, the first molding unit is reset, and the first mold sleeve is raised to expose the tube body that forms the pattern, thus obtaining the outer shell of the irregularly shaped vacuum vessel.

[0023] S5. After assembling the outer shell and inner liner, vacuum is applied to obtain an irregularly shaped vacuum vessel.

[0024] The present application, employing the above-described scheme, has the following beneficial effects:

[0025] 1. By setting a sliding first molding unit on the first mold sleeve, different irregular cups can be molded according to different needs, and patterns can be formed simultaneously on the irregular parts, thereby improving the appearance and surface quality of the vacuum vessel;

[0026] 2. By setting through grooves and support components on the first mold sleeve, and by cooperating with the first forming unit and the baffle, the position of the irregular parts and patterns can be adjusted during the cup body forming, thereby forming cup bodies of different specifications. After the position is adjusted, no marks will be formed on the cup body, which can further improve the appearance quality of the vacuum vessel and reduce subsequent processes.

[0027] 3. By setting up a first mold mechanism and a second mold mechanism, it is possible to form irregular parts and patterns on both the upper and lower surfaces of the cup body, and the positions of the irregular parts and patterns on the upper and lower surfaces of the cup body can be adjusted, so that one type of cup body or two types of cup bodies can be obtained in one mold opening, thereby improving production efficiency.

[0028] 4. By setting the pattern blocks in the first molding unit to be replaceable, it is possible to obtain irregular cups and cup patterns of different sizes, shapes and patterns according to different product requirements, thereby reducing the frequency of mold replacement and adjustment and reducing mold opening costs. Attached Figure Description

[0029] This application can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0030] Figure 1 This is a schematic diagram of the structure of the first mold mechanism in the embodiments of this application;

[0031] Figure 2 This is one of the structural schematic diagrams of the first molding unit in the embodiments of this application;

[0032] Figure 3 yes Figure 2 Enlarged structural diagram at point A;

[0033] Figure 4 yes Figure 2 Enlarged structural diagram at point B;

[0034] Figure 5 This is a schematic diagram of the sleeve structure in an embodiment of this application;

[0035] Figure 6 This is the second structural schematic diagram of the first molding unit in the embodiments of this application;

[0036] Figure 7 A schematic diagram of the structure in which the first mold mechanism and the second mold mechanism are used in cooperation in the embodiments of this application;

[0037] Figure 8 yes Figure 7 Enlarged structural diagram at point C;

[0038] Figure 9 This is a cross-sectional view of the first mold mechanism and the second mold mechanism used in cooperation in the embodiments of this application;

[0039] Figure 10 yes Figure 9 Enlarged structural diagram at point D;

[0040] Figure 11 This is a schematic diagram of the structure of the first core rod in the embodiments of this application;

[0041] Figure 12 This is one of the structural schematic diagrams of the retaining sleeve in the embodiments of this application;

[0042] Figure 13 This is the second schematic diagram of the structure of the retaining sleeve in the embodiments of this application;

[0043] Figure 14 This application provides a schematic diagram of the structure of a cup body with patterns and irregular shapes in its embodiments;

[0044] Explanation of key component symbols:

[0045] 100. First mold mechanism; 1. Mounting platform; 11. Liquid injection port; 12. Mounting base; 121. Mounting groove; 13. Connecting piece; 131. Bolt; 132. First limiting ring; 133. Third limiting ring; 134. Second limiting ring; 135. Sleeve; 136. Compression spring;

[0046] 200. Second mold mechanism; 2. Sleeve; 21. Through groove; 211. Receiving groove; 212. Sliding groove;

[0047] 3. First model unit; 31. Pattern block; 311. Fixing block; 312. Extension plate; 313. Mounting block; 314. Sliding rod; 315. Spring; 32. First driving component; 320. Second driving component; 3201. Wedge block; 321. First transmission rod; 322. Second transmission rod; 33. Support block; 331. Support rod; 332. Reset component; 34. Sleeve; 35. Elastic component;

[0048] 4. First core rod; 40. Second core rod; 41. Core seat; 42. Connecting seat; 43. Hollow rod body; 431. Through hole;

[0049] 5. Tube body; 51. Pattern; 52. Irregular shape. Detailed Implementation

[0050] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are for illustrative purposes only and represent schematic diagrams, not actual pictures, and should not be construed as limiting the present invention. In order to better illustrate the embodiments of the present invention, some components in the figures may be omitted, enlarged, or reduced, and do not represent the actual product size; it is understandable for those skilled in the art that some well-known structures and their descriptions may be omitted in the figures.

[0051] In the figures of this invention, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the figures are for illustrative purposes only and should not be construed as limiting this invention. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0052] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0053] like Figure 1-14 As shown in the embodiment of this application, a non-marking hydroforming device for irregularly shaped vacuum vessels is disclosed, including a first mold mechanism 100 and a second mold mechanism 200. The second mold mechanism 200 is symmetrically arranged on the first mold mechanism 100 and communicates with the first mold mechanism 100. It is used to cooperate with the first mold mechanism 100 to simultaneously form the outer shell of two vacuum vessels, so that the cup body (outer shell) of one type of vacuum vessel or the cup body (outer shell) of two types of vacuum vessels can be obtained in one mold opening, thereby improving production efficiency.

[0054] In some implementations, such as Figure 1 As shown, the first mold mechanism 100 can be used independently. When the first mold mechanism 100 is used independently, the bottom of the first mold mechanism 100 abuts against the worktable, so that a cup body can be formed each time the water expansion molding is performed. The cup body has both irregular shape 52 and pattern 51.

[0055] In some implementations, such as Figure 7 As shown, the first mold mechanism 100 and the second mold mechanism 200 can be used together. When the first mold mechanism 100 and the second mold mechanism 200 are used together, the bottom of the first mold mechanism 100 abuts against the bottom of the second mold mechanism 200, so that two cups can be formed each time the water expansion molding is performed. The two cups can be formed with the same irregular shape 52 and pattern 51, or different irregular shapes 52 and patterns 51 can be formed. Thus, one or two cups can be obtained in one mold opening, thereby improving production efficiency.

[0056] In this embodiment, as Figure 1-6As shown, the first mold mechanism 100 includes a first mold base, a first model unit 3, and a first mandrel 4. The first model unit 3 is mounted on the first mold base and is used to print a pattern 51 on the upper surface of the outer shell of the vacuum vessel. The first mandrel 4 is disposed within the first model unit 3 and is used to provide a flow channel for the liquid medium, so that when the liquid medium passes through the first mandrel 4, it can enter between the first mandrel 4 and the tube 5, causing the tube 5 to expand. The second mold mechanism 200 includes a second mold base, a second model unit, and a second mandrel 40. The second model unit is mounted on the second mold base and is used to print a pattern 51 on the lower surface of the outer shell of the vacuum vessel. The second mandrel 40 is disposed within the second model unit and is used to provide a flow channel for the liquid medium, so that when the liquid medium passes through the second mandrel 40, it can enter between the second mandrel 40 and the tube 5, causing the tube 5 to expand, thereby coordinating with the fluid medium entering from the first mandrel 4 to synchronously expand the tube 5.

[0057] In some embodiments, such as Figure 1-2 As shown, the first mold base and the second mold base have the same structure. The following description uses the first mold base as an example: The first mold base includes a mounting platform 1, a connector 13, and a mounting seat 12. The mounting seat 12 is mounted on one side of the mounting platform 1 through the connector 13, which is used to connect the mounting seat 12 and the mounting platform 1 into a whole. A liquid injection port 11 is provided in the middle of the mounting platform 1, and a mounting groove 121 is provided on the mounting seat 12. The liquid injection port 11 communicates with the mounting groove 121, so that the external liquid medium can enter the mounting groove 121 through the liquid injection port 11, and thus enter the first mandrel 4 and the second mandrel 40. The upper part of the first mandrel 4 is mounted on the mounting groove 121 of the first mold base, and the lower part passes through the first model unit 3. The upper part of the second mandrel 40 is mounted on the mounting groove 121 of the second mold base, and the lower part passes through the second model unit, so that the liquid medium can enter the tube body 5 and the first model unit 3 and the second model unit through the first mandrel 4 and the second mandrel 40, thereby expanding the tube body 5.

[0058] In this embodiment, as Figure 3As shown, the connector 13 can be a long bolt, which connects the mounting platform 1, the mounting base 12, and the first model unit 3 into a whole. The connector 13 can also be a bolt 131 and a sleeve 135. The lower end of the bolt 131 is threaded, and the upper end is a smooth rod. The threaded section of the bolt 131 is screwed onto the first model unit 3, and the smooth rod section extends out of the mounting base 12. A first limiting ring 132 and a second limiting ring 134 are fixedly installed on the smooth rod section. A third limiting ring 133 is fixedly installed inside the sleeve 135. A compression spring 136 is sleeved on the first limiting ring 132. One end of the compression spring 136 is fixedly connected to the first limiting ring 132, and the other end is connected to the third limiting ring 133, so that the positions of the sleeve 135 and the bolt 131 are relatively adjustable. There is a gap between the second limiting ring 134 and the third limiting ring 133, and the outer diameter of the third limiting ring 133 is larger than the outer diameter of the second limiting ring 134, so that the sleeve 135 will not slip off the bolt 131. The top of the sleeve 135 protrudes from the mounting platform 1, and the outside of the sleeve 135 has external threads. It is screwed onto the external threads by a nut, thereby fixing the sleeve 135 to the mounting platform 1, and thus allowing relative sliding between the mounting platform 1, the mounting base 12 and the first model unit 3.

[0059] In this embodiment, as Figure 9 and Figure 11 As shown, the first core rod 4 and the second core rod 40 have the same structure. The following explanation uses the first core rod 4 as an example: The first core rod 4 includes a core seat 41, a connecting seat 42, and a hollow rod body 43. One end of the connecting seat 42 is fixedly connected to the core seat 41, and the other end is fixedly connected to the hollow rod body 43, making the first core rod 4 a single unit. The core seat 41, the connecting seat 42, and the hollow rod body 43 are interconnected, allowing the liquid medium to enter the first model unit 3 through the first core rod 4 after passing through the injection port 11. A step is formed at the connection between the connecting seat 42 and the core seat 41, used to position the upper part of the vacuum vessel's outer shell. This, combined with the lower part of the vacuum vessel's outer shell placed on the step of the second core rod 40, stably positions the vacuum vessel's cup (outer shell) on the first core rod 4 and the second core rod 40.

[0060] In this embodiment, the core seat 41, connecting seat 42, and hollow rod 43 can be integrally cast or welded together. To prevent fluid leakage, a gap is formed between the step and the first model unit 3 to further define the position of the cup and seal the gap between them. A sealing ring or sealing sleeve can also be provided at the step to further enhance the sealing effect.

[0061] In this embodiment, when the first mold mechanism 100 is used alone, the free end of the hollow rod 43 can have a gap with the worktable to facilitate the outflow of the liquid medium; the free end of the hollow rod 43 can also abut against the worktable. In this case, the hollow rod 43 has several through holes 431, which are evenly distributed on the hollow rod 43, allowing the fluid medium to flow out evenly from the through holes 431, making the force more uniform during the expansion of the cup. When the first mold mechanism 100 and the second mold mechanism 200 are used together, the two hollow rods 43 can abut against each other. In this case, the hollow rods 43 have through holes 431; there can also be a gap between the two hollow rods 43 to allow the fluid medium to flow out.

[0062] In some alternative embodiments, such as Figure 1-9 As shown, the first model unit 3 includes a first mold sleeve and a first molding unit. The first mold sleeve is fitted onto a first mold base, and the first molding unit is slidably disposed on the first mold sleeve, used to control the axial and radial distances of the first molding unit on the first mold sleeve, thereby achieving the formation of patterns 51 and irregular shapes 52 of different depths and positions on the upper part of the cup body. The second model unit includes a second mold sleeve and a second molding unit. One end of the second mold sleeve is fitted onto the second mold base, and the other end abuts against the first mold sleeve, used to close the first and second mold sleeves. The second molding unit is slidably disposed on the second mold sleeve, used to control the axial and radial distances of the second molding unit on the second mold sleeve, thereby achieving the formation of patterns 51 and irregular shapes 52 of different depths and positions on the upper part of the cup body, thus enabling the upper and lower parts of the cup body to form the same or different irregular shapes 52 and patterns 51.

[0063] In one alternative implementation, such as Figure 5 As shown, the first mold sleeve and the second mold sleeve have the same structure. The following description uses the first mold sleeve as an example: The first mold sleeve includes a sleeve 2. The sleeve 2 is assembled to the lower part of the first mold base through a connector 13. At least two through slots 21 are symmetrically opened on the sleeve 2. In this embodiment, the through slots 21 are set to two or four.

[0064] like Figure 6 As shown, the first molding unit and the second molding unit have the same structure. The following description takes the first molding unit as an example. The first molding unit includes at least two pattern blocks 31, a first driving member 32, and a second driving member 320. The first driving member 32 and the second driving member 320 are respectively connected to each pattern block 31. In this embodiment, there are two or four pattern blocks 31. The two or four pattern blocks 31 are respectively disposed in two or four through slots 21, and the side surface of the pattern block 31 facing the cup body has a pattern. At this time, the size of the pattern block 31 matches the size of the through slot 21, so that when the cup body is molded, the pattern of the pattern block 31 can be formed on the cup body, and the edge of the pattern block 31 can form an irregular shape 52 on the cup body.

[0065] In an optional embodiment, the first driving member 32 and the second driving member 320 have the same structure and are both set as L-shaped plates. The upper end of the L-shaped plate is fixedly connected to the outer surface of the mounting base 12, and the lower end is a slope. The two L-shaped plates are symmetrically arranged and located outside the two pattern blocks 31. In this case, the connecting member 13 is a bolt 131 engaging with the sleeve 135. The mounting base 12 and the mounting platform 1 are a whole, and the position of the mounting base 12 can slide relative to the sleeve 2.

[0066] In the initial position, when using one sleeve 2 alone or two sleeves 2 together, there is a certain gap between the mounting base 12 and the sleeve 2. When the mounting platform 1 is driven down, the mounting base 12 compresses the spring 136 and descends, causing the L-shaped plate to descend. This causes the lower inclined surface of the L-shaped plate to press the pattern block 31, making the pattern block 31 move axially into the sleeve 2. This can form patterns 51 and irregular shapes 52 of different depths. Apart from the patterns 51 and irregular shapes 52, there are no marks on other parts of the cup body, achieving traceless hydraulic forming.

[0067] To facilitate the reset of the pattern block 31, elastic elements 35 are provided between the two ends of the pattern block 31 and the surface of the sleeve 2. The elastic elements 35 can be spring sheets, compression springs 136 or elastic rubber blocks, so that the pattern block 31 can automatically reset after the L-shaped plate is separated from the pattern block 31. This facilitates the next molding of patterns 51 and irregular shapes 52 of different depths, and allows the pattern block 31 to be directly removed and replaced with different pattern blocks 31, which is conducive to the standardized design of the pattern block 31.

[0068] like Figure 2 , Figure 4-5 ,and Figure 7-9 As shown, to adjust the radial position of pattern 51 and irregular shape 52 formed on the cup body, the radial dimension of the through groove 21 is larger than the size of the pattern block 31, and each through groove 21 is provided with a support component to support the pattern block 31. Taking one of the support components as an example, the following description is provided: The support component includes a support rod 331, a reset member 332, and a support block 33. Receiving grooves 211 are respectively opened on both sides of the through groove 21. The support rod 331 is symmetrically installed in the two receiving grooves 211, and the support block 33 is slidably installed on the two support rods 331, so that the support block 33 can slide along the support rods 331. One end of the reset member 332 is located at the bottom of the through groove 21, and the other end is connected to the bottom of the support block 33, so that the support block 33 can support the pattern block 31 in real time.

[0069] In this embodiment, the reset element 332 can be a spring 315 or a compression spring 136. The spring 315 is sleeved on each support rod 331, with one end connected to the bottom of the through groove 21 and the other end connected to the support block 33, so that the pattern block 31 can be reset after each radial movement for easy use next time. Alternatively, it can be a miniature telescopic motor, with the housing of the miniature telescopic motor fixedly installed at the bottom of the through groove 21 and the output end connected to the bottom of the support block 33. In actual use, the type of reset element 332 can be selected according to specific needs.

[0070] In this embodiment, as Figure 8 As shown, to accommodate the movement of the pattern block 31 along the length of the sleeve 2, the first driving component 32 includes a first transmission rod 321 and a second transmission rod 322. A fixing block 311 is fixedly connected to one side of the pattern block 31, and an extension plate 312 is fixedly connected to the fixing block 311. One end of the first transmission rod 321 and the second transmission rod 322 are both connected to the extension plate 312, so that when the first transmission rod 321 and the second transmission rod 322 move downward, they can drive the extension plate 312 to move downward. The downward movement of the extension plate 312 can drive the pattern block 31 to move downward, thereby adjusting the radial position of the pattern block 31. A mounting block 313 is fixedly provided on the extension plate 312. A sliding rod 314 is respectively provided between the mounting block 313 and the first transmission rod 321 and the second transmission rod 322. A spring 315 is sleeved on the sliding rod 314, so that the pattern block 31 can be reset after axially moving into the sleeve 2.

[0071] In this embodiment, the second driving member 320 includes a third driving rod. A wedge block 3201 is fixedly disposed on the fixed block 311, and one end of the third driving rod is connected to the wedge block 3201 to drive the fixed block 311 and the pattern block 31 to move axially, so that the pattern block 31 can have different axial depths within the sleeve 2.

[0072] like Figure 9 and Figure 12 As shown, a retaining sleeve 34 is fitted onto the pattern block 31. The retaining sleeve 34 can be a single, integral circular sleeve. A sliding groove 212 is formed on the upper part of the sleeve 2. The upper part of the retaining sleeve 34 is located within the sliding groove 212. The lower end of the opening of the sliding groove 212, where it connects with the sleeve 2, is arc-shaped. Through the action of the retaining sleeve 34, the cup body is arc-shaped at this point during expansion and forming, forming the opening end of the cup body, thus preventing the formation of additional marks and achieving a mark-free hydraulic process. The lower end of the retaining sleeve 34 is arc-shaped. During expansion and forming, an arc-shaped mark is formed on the lower part of the cup body. This arc-shaped mark can be cut off, leaving no mark on the cup body.

[0073] In this embodiment, when it is necessary to adjust the position of pattern 51 and irregular shape 52 on the cup body, the adjustment method is that the positions of multiple patterns 51 and irregular shape 52 are adjusted simultaneously. The first transmission rod 321 and the second transmission rod 322 move downward first, driving the extension plate 312 and pattern block 31 to move downward. The pattern block 31 presses the support block 33 downward, and the pattern block 31 simultaneously drives the retaining sleeve 34 to descend. During the descent, the upper end of the retaining sleeve 34 will not disengage from the sliding groove 212. After the pattern block 31 moves into place, the position of pattern 51 and irregular shape 52 on the cup body is determined. The third drive rod descends and connects with the wedge block 3201. The third drive rod continues to descend, causing the pattern block 31 to move axially toward the sleeve 2. At this time, since the retaining sleeve 34 is a whole and the upper end of the retaining sleeve 34 abuts against the sliding groove 212, the pattern block 31 can slide smoothly in the retaining sleeve 34, thereby controlling the depth of the pattern 51 on the cup body. When pattern block 31 needs to be replaced, the sliding rod 314 is removed, the spring 315 is removed, and the first transmission rod 321 and the second transmission rod 322 are raised a certain distance, so that pattern block 31 in this state can be replaced, which can further realize the standardization of pattern block 31.

[0074] In this embodiment, such as Figure 13 As shown, in order to achieve asynchronous adjustment of multiple patterns 51 and irregular shapes 52, the retainer 34 is a split type, that is, each pattern block 31 corresponds to an arc-shaped retainer 34 and slides out of the arc-shaped retainer 34. The upper part of each arc is located in the sliding groove 212, so that the pattern block 31 corresponding to each first transmission rod 321 and second transmission rod 322 can have different lifting heights in the through groove 21, so that the positions of the pattern 51 and irregular shape 52 formed on the cup body are different, further realizing the differentiation of the irregular shape 52 cup body.

[0075] In this embodiment, one cup body with pattern 51 and irregular shape 52 can be formed at one time, or two cup bodies with pattern 51 and irregular shape 52 can be formed at one time. When forming two cup bodies with pattern 51 and irregular shape 52, the positions of the two patterns 51 can be symmetrical or different. The appropriate pattern 51 and irregular shape 52 can be selected according to actual production needs.

[0076] This application also discloses a seamless hydroforming process for irregularly shaped vacuum vessels, which includes the following steps:

[0077] S1. Place the tube body 5 inside the sleeve 2, so that the upper part of the tube body 5 is outside the first core rod 4 and the lower part corresponds to the second core rod 40. Then close the two sleeves 2 together, so that the upper part of the tube body 5 corresponds to the first core rod 4 and the lower part corresponds to the second core rod 40.

[0078] S2. Based on the depth requirement of the pattern 51 on the outer shell surface of the vacuum vessel, the axial and radial distances of the pattern block 31 on the two sleeves 2 are controlled by controlling the first drive member 32 and the second drive member 320.

[0079] S3. Fluid medium is delivered into the first core rod 4 and the second core rod 40 through the injection port 11 on the first mold base and the injection port 11 on the second mold base respectively, so that the fluid medium is injected between the core rod and the tube body 5, expanding the tube body 5. During the expansion of the tube body 5, it contacts the pattern block 31, forming a pattern 51 on the surface of the tube body 5, and simultaneously forming the irregular part 52.

[0080] S4. After the pattern 51 is formed, the fluid medium is extracted, the pattern block 31 is reset, and the two sleeves 2 are separated to expose the tube 5 that forms the pattern 51, thus obtaining the outer shell of the irregularly shaped vacuum vessel.

[0081] S5. Cut the outer shell of the tube 5 forming pattern 51 from the middle, and then assemble the outer shell and the inner liner, and then evacuate to obtain an irregularly shaped vacuum vessel.

[0082] The above processing technology allows for the production of two cups of the same or different specifications in a single mold opening, thereby improving production efficiency.

[0083] The foregoing has provided a detailed description of the non-marking hydraulic forming device and forming process for irregularly shaped vacuum vessels provided by the present invention. The specific embodiments described are merely for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0084] It should be noted that the terms "one embodiment," "embodiment," "some alternative embodiments," "exemplary embodiments," and "some embodiments" used in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0085] It should be readily understood that the terms “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on top of something” but also “on top of something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0086] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0087] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A seamless hydraulic forming device for irregularly shaped vacuum vessels, characterized in that, The first mold mechanism (100) includes a first mold base, a first model unit (3) and a first mandrel (4). The first model unit (3) is assembled on the first mold base and includes a first mold sleeve and a first molding unit. The first mold sleeve is assembled on the first mold base and the first molding unit is slidably disposed on the first mold sleeve for printing a pattern (51) on the surface of the outer shell of the vacuum vessel. The first mandrel (4) is disposed in the first mold sleeve for providing a flow channel for the liquid medium to the first model unit (3). The first mold sleeve includes a sleeve (2) and a support assembly. The sleeve (2) is assembled on the first mold base. Two through slots (21) are symmetrically opened on the sleeve (2). The support assembly is slidably installed in the two through slots (21). The support assembly includes a support rod (331), a reset member (332), and a support block (33). The two sides of the through groove (21) are respectively provided with receiving grooves (211). The support rod (331) is symmetrically installed in the two receiving grooves (211). The support block (33) is slidably installed on the two support rods (331). One end of the reset member (332) is set at the bottom of the through groove (21), and the other end is connected to the bottom of the support block (33). The first molding unit includes a first driving component (32), a second driving component (320), and two pattern blocks (31); The first driving component (32) includes a first transmission rod (321) and a second transmission rod (322). A fixing block (311) is fixedly connected to one side of the pattern block (31). An extension plate (312) is fixedly connected to the fixing block (311). One end of the first transmission rod (321) and the second transmission rod (322) are both connected to the extension plate (312). An installation block (313) is fixedly provided on the extension plate (312). A sliding rod (314) is respectively provided between the installation block (313), the first transmission rod (321), and the second transmission rod (322). A spring (315) is sleeved on the sliding rod (314). The second driving member (320) includes a driving rod, and a wedge block (3201) is provided on the fixed block (311). One end of the driving rod is connected to the wedge block (3201) and is used to drive the fixed block (311) and the pattern block (31) to move radially. A retaining sleeve (34) is provided on the pattern block (31).

2. The non-marking hydroforming device for irregularly shaped vacuum vessels according to claim 1, characterized in that, It also includes a second mold mechanism (200), which is symmetrically arranged on the first mold mechanism (100) and communicates with the first mold mechanism (100) to cooperate with the first mold mechanism (100) to simultaneously form the outer shells of two vacuum vessels; The second mold mechanism (200) includes a second mold base, a second model unit, and a second mandrel (40). The second model unit is assembled on the second mold base. The second model unit includes a second mold sleeve and a second molding unit. One end of the second mold sleeve is assembled on the second mold base, and the other end abuts against the first mold sleeve. The second molding unit is slidably disposed on the second mold sleeve for printing a pattern (51) on the outer surface of the vacuum vessel. The second mandrel (40) is disposed inside the second mold sleeve for providing a flow channel for the liquid medium to the second model unit.

3. The non-marking hydroforming device for irregularly shaped vacuum vessels according to claim 2, characterized in that, The first mold base and the second mold base have the same structure. The first mold base includes a mounting platform (1), a connector (13) and a mounting seat (12). The mounting seat (12) is mounted on one side of the mounting platform (1) through the connector (13). The mounting platform (1) has an injection port (11) and the mounting seat (12) has an installation groove (121). The injection port (11) is connected to the installation groove (121). The first mandrel (4) is mounted on the installation groove (121) and partially penetrates the first mold sleeve.

4. The non-marking hydroforming device for irregularly shaped vacuum vessels according to claim 2, characterized in that, The first core rod (4) and the second core rod (40) have the same structure. The first core rod (4) includes a core seat (41), a connecting seat (42) and a hollow rod body (43). One end of the connecting seat (42) is fixedly connected to the core seat (41), and the other end is fixedly connected to the hollow rod body (43). The core seat (41), the connecting seat (42) and the hollow rod body (43) are interconnected. A step is formed at the connection between the connecting seat (42) and the core seat (41) to position the outer shell of the vacuum vessel.

5. The non-marking hydroforming device for irregularly shaped vacuum vessels according to claim 4, characterized in that, The hollow rod (43) has several through holes (431).

6. The non-marking hydroforming device for irregularly shaped vacuum vessels according to claim 2, characterized in that, The first mold and the second mold have the same structure.

7. The non-marking hydroforming apparatus for irregularly shaped vacuum vessels according to claim 2 or 6, characterized in that, The first molding unit and the second molding unit have the same structure. The two pattern blocks (31) are slidably disposed on the first mold sleeve and are symmetrically disposed.

8. A process for using the non-marking hydroforming apparatus for irregularly shaped vacuum vessels as described in claim 1, characterized in that, Includes the following steps: S1. Place the tube (5) inside the first mold sleeve and outside the first mandrel (4), and then place the bottom of the first mold sleeve against the worktable; S2. Control the radial distance of the first molding unit on the first mold according to the depth of the pattern (51) on the outer surface of the vacuum vessel; S3. Fluid medium is delivered into the first mandrel (4) through the first mold base, so that the fluid medium is injected between the first mandrel and the tube (5), expanding the tube (5), and during the expansion of the tube (5), it contacts the first molding unit to form a pattern (51) on the surface of the tube (5). S4. After the pattern (51) is formed, the fluid medium is extracted, the first molding unit is reset, and the first mold sleeve is raised to expose the tube (5) that forms the pattern (51) and obtain the outer shell of the irregularly shaped vacuum vessel. S5. After assembling the outer shell and inner liner, vacuum is applied to obtain an irregularly shaped vacuum vessel.

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