A production process for special-shaped airdrop water bags using high-frequency welding

Abstract

The present invention relates to a production process for special-shaped airdrop water bags using high-frequency welding. The specific steps include: S1, preparing the water bag base material; S2, positioning the segmented forming mold; S3, positioning the water bag base material; S4, clamping the water bag base material; S5, high-frequency welding; S6, welding another cover body; S7, retracting multiple positioning pieces and removing the segmented forming mold; splicing the last side enclosing piece with the water bag blank two and placing it in a high-frequency welding machine to complete the welding of the splicing seam. The present invention has the following advantages: Through the split positioning of multiple side enclosing pieces and cover bodies on the segmented forming mold, the automatic welding of special-shaped airdrop water bags is realized, the positioning and splicing accuracy is improved, and the blanking of special-shaped airdrop water bags on the segmented forming mold is quickly achieved, meeting the production and processing of special-shaped airdrop water bags of different specifications.

Description

Technical Field

[0001] The present invention belongs to the field of production of special-shaped airdropped water bags, and particularly relates to a production process of special-shaped airdropped water bags using high-frequency welding. Background Art

[0002] Airdropped water bags play an extremely important practical role in wartime operations or rapid water supply in response to sudden disasters. Compared with traditional water bags, airdropped water bags need to resist strong impact forces, otherwise the water bags will be damaged, and thus the purpose of water supply cannot be achieved. The special-shaped airdropped water bag with a lantern-shaped structure combines the principles of aerodynamics and slow descent, and has the following advantages: 1. The water bag with a lantern-shaped structure has a small volume when folded, which is convenient for storage and collection, and can hold a large amount of water after being unfolded; 2. When the water bag with a lantern-shaped structure falls during airdrop, the falling speed is greatly reduced by using air resistance, avoiding the water bag from breaking due to high-speed impact on the ground, and its symmetrical structure can keep it falling vertically to ensure the water bag lands smoothly; 3. When the water bag with a lantern-shaped structure is airdropped, it is less affected by wind force, and with a GPS or guiding device, the landing point accuracy can be improved, which is suitable for delivering to the target area in disaster relief.

[0003] When the special-shaped airdropped water bag with a lantern-shaped structure is processed and produced, the water bag generally includes a side enclosure body and cover bodies arranged at the upper and lower ends of the side enclosure body. A cleaning flange, a water outlet flange, and a water inlet flange are installed on the cover bodies. Currently, when processing and producing it, a whole-piece side enclosure body is usually selected. The two end parts of the side enclosure body are spliced to form a longitudinal seam, and then spliced with the upper and lower two cover bodies to form a circumferential seam. The longitudinal seam and the circumferential seam are clamped and positioned, and then welded by high frequency. Since the structure formed after the side enclosure body of the special-shaped airdropped water bag with a lantern-shaped structure is enclosed has different outer diameters from top to bottom, when the whole-piece side enclosure body is spliced with the two cover bodies, if a lantern-shaped mold is used to position the side enclosure body on its mold, but the side enclosure body after the longitudinal seam is welded cannot be unloaded from the mold. Therefore, for the positioning welding of the whole-piece side enclosure body and the cover body, it can only be positioned and bonded manually, so the bonding positioning accuracy is low. If the symmetrical deviation of the external shape of the welded special-shaped airdropped water bag is large, it is prone to rotate or shift during falling, thereby reducing the delivery accuracy; secondly, for the processing of special-shaped airdropped water bags of different specifications, molds of different sizes need to be configured. Especially for special-shaped airdropped water bags with larger sizes, the cost of mold development and production is relatively high. Therefore, a production process of special-shaped airdropped water bags using high-frequency welding is needed to effectively solve the above technical problems. Summary of the Invention

[0004] The object of the present invention is to overcome the above deficiencies and provide a production process for special-shaped airdrop water bags using high-frequency welding. Through the split positioning of multiple side enclosure sheets and the cover body on the split forming die, the automatic welding of the special-shaped airdrop water bag is realized, the positioning and splicing accuracy is improved, and the blanking of the special-shaped airdrop water bag on the split forming die is quickly achieved, meeting the production and processing of special-shaped airdrop water bags of different specifications.

[0005] The object of the present invention is achieved through the following technical solutions: A production process for special-shaped airdrop water bags using high-frequency welding, the specific steps include,

[0006] S1. Prepare the water bag base material: Cut the base material of the special-shaped airdrop water bag to obtain two upper and lower cover bodies and N side enclosure sheets;

[0007] S2. Position the split forming die: The split forming die includes an expanding positioning support mechanism, a circumferential seam clamping head, and a side longitudinal seam clamping mechanism arranged in sequence from bottom to top;

[0008] The expanding positioning support mechanism includes multiple positioning pieces that synchronously contract or expand;

[0009] The side longitudinal seam clamping mechanism includes a clamping ring sleeved on the middle part of the outer circumference of multiple positioning pieces, and there are multiple side clamping elastic pieces between the circumferential seam clamping head and the clamping ring;

[0010] S3. Position the water bag base material: Select N - 1 side enclosure sheets and one cover body, attach the N - 1 side enclosure sheets to the outer end faces of multiple positioning pieces, the head and tail of adjacent two side enclosure sheets overlap to form a longitudinal seam, sleeve the clamping ring on the middle position of the outer side of multiple positioning pieces, position the cover body on the upper ends of multiple side enclosure sheets, and the outer edge of the cover body and the upper end faces of multiple side enclosure sheets overlap up and down to form a circumferential seam;

[0011] S4. Clamp the water bag base material: The circumferential seam clamping head clamps the circumferential seam, install the side clamping elastic pieces, and complete the clamping of the longitudinal seam between adjacent two side enclosure sheets;

[0012] S5. High-frequency welding: Place the whole split forming die in a high-frequency welding machine, and use the high-frequency electromagnetic field to complete the longitudinal and circumferential seam welding of N - 1 side enclosure sheets and one cover body to form a water bag blank one;

[0013] S6. Weld the other cover body: Take out the water bag blank one from the split forming die, exchange the up and down position of the water bag blank one, and complete the welding with the other cover body to form a water bag blank two;

[0014] S7. Retract multiple positioning pieces and take out the segmented forming die; splice the last side body enclosing sheet and the second water bag blank, and place them in a high-frequency welder to complete the welding of the splicing seam.

[0015] A further improvement of the present invention lies in: the specific steps of step S3 are as follows. First, position the lower end of the side body clamping spring piece on the clamping ring, then place the circumferential seam clamping head on the upper ends of multiple positioning pieces. At the same time, the upper end of the side body clamping spring piece is embedded in the circumferential seam clamping head, and the circumferential seam clamping head clamps the circumferential seam, and the side body clamping spring piece clamps the longitudinal seam between two adjacent side body enclosing sheet bodies.

[0016] A further improvement of the present invention lies in: the specific steps of step S8 are as follows.

[0017] S71. Position and pre-splice the last side body enclosing sheet and the second water bag blank on the segmented forming die, mark the contact points of the two, remove the last side body enclosing sheet, retract the overall expansion type positioning support mechanism, and take out the segmented forming die;

[0018] S72. Manually position the side body enclosing sheet and the second water bag blank again according to the marked position in S71. Take an arc-shaped pressing strip, place the pressing strip inside the splicing seam of the side body enclosing sheet and the second water bag blank, place it in a high-frequency welder and clamp the outside of the splicing seam, and complete the welding to form the third water bag blank;

[0019] S73. After sequentially performing high-frequency welding on multiple splicing seams, take out the pressing strip from the reserved hole of a cover body;

[0020] S74. Install a cleaning flange, an outlet flange, and an inlet flange at the reserved holes of the two cover bodies of the third water bag blank to obtain a special-shaped airdropping water bag.

[0021] A further improvement of the present invention lies in: the expansion type positioning support mechanism further includes an expansion drive group for synchronously retracting or expanding multiple positioning pieces;

[0022] The expansion drive group includes a support seat and a drive seat placed on the support seat. The drive seat has a drive motor inside. Multiple positioning pieces are arranged around the outer circumference of the drive seat. The drive end of the drive motor vertically penetrates the bottom of the drive seat. Activity connecting rods are respectively hinged between the outer wall of the drive seat, the outer wall of the drive end of the drive motor and the corresponding positioning pieces. When the drive motor expands and contracts, the corresponding activity connecting rods rotate, so as to realize the synchronous retraction or expansion of multiple positioning pieces.

[0023] A further improvement of the present invention lies in that: the positioning piece includes a side arc positioning piece body and a cover body guiding positioning piece body disposed at the upper side end of the side arc positioning piece body. There is a reserved platform between the cover body guiding positioning piece body and the outer end face of the positioning piece for the upper end of the side surrounding piece body and the lower end of the cover body to fit together.

[0024] A further improvement of the present invention lies in that: there are a plurality of telescopic support columns between the lower end of the driving seat and the support seat. The movable connecting rod disposed at the lower side passes through two adjacent telescopic support columns and is connected to the corresponding positioning piece. The upper end of the driving seat has a cover body positioning platform. The center of the upper end of the cover body positioning platform has a positioning column for embedding the reserved hole at the center position of the cover body. The cover body guiding positioning piece body extends in an arc shape towards the cover body positioning platform.

[0025] A further improvement of the present invention lies in that: the circumferential seam clamping press head includes a pressing ring embedded in the reserved platform and a cover body pressing platform disposed at the center position inside the pressing ring. The cover body pressing platform and the pressing ring are detachably connected by a plurality of first telescopic springs. The center of the pressing ring has a through hole for the positioning column to pass through.

[0026] A further improvement of the present invention lies in that: a plurality of first telescopic springs are arranged around the outer end of the cover body pressing platform. One end of the first telescopic spring is fixed to the cover body pressing platform, and the other end of the first telescopic spring has a buckle. The inner wall of the pressing ring has a clamping ring matching with the buckle.

[0027] A further improvement of the present invention lies in that: the side clamping elastic piece includes an elastic piece body, an upper limit block disposed at the upper end of the elastic piece body, and a lower limit block disposed at the lower end of the elastic piece body. There is a first limit groove for embedding the upper limit block in the pressing ring, and a second limit groove for embedding the lower limit block in the clamping ring.

[0028] A further improvement of the present invention lies in that: both the clamping ring and the pressing ring achieve circumferential change through a telescopic connection group. The telescopic connection group is formed by surrounding a plurality of arc segments. One end of the arc segment has an arc-shaped insert, and the other end of the arc segment has an arc-shaped insert groove. The arc-shaped inserts of two adjacent arc segments cooperate with the arc-shaped insert grooves, and there is a second telescopic spring between two adjacent arc segments.

[0029] The present invention has the following advantages compared with the prior art:

[0030] 1. The present invention changes the traditional splicing and welding process of the integral side enclosing sheet body and the two cover bodies. It positions and clamps multiple side enclosing sheet bodies and the two cover bodies on a split-type forming die that can be contracted or expanded, improving the positioning and splicing accuracy. After completing the splicing seam welding on a high-frequency welder, the split-type forming die contracts and is removed, and then the last side enclosing sheet body is positioned and welded, quickly realizing the positioning welding of the special-shaped airdrop water bag and the blanking of the special-shaped airdrop water bag on the split-type forming die, avoiding the influence on product performance caused by manual bonding, thereby ensuring the delivery accuracy of the special-shaped airdrop water bag.

[0031] 2. Through the split-type positioning of multiple split side enclosing sheet bodies and cover bodies on the split-type forming die, the present invention realizes the automatic positioning welding of the special-shaped airdrop water bag, synchronously realizes the positioning welding of multiple longitudinal seams and a single circumferential seam. At the same time, the expansion-type positioning support mechanism of the split-type forming die can support and position the side enclosing sheet bodies of different sizes by contraction or expansion, meeting the production and processing of special-shaped airdrop water bags of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic structural diagram of the special-shaped airdrop water bag in the present invention.

[0033] Figure 2 It is a schematic production process diagram of the special-shaped airdrop water bag in the present invention.

[0034] Figure 3 It is a schematic position diagram of the pressing strip at the longitudinal seam in the present invention.

[0035] Figure 4 It is a schematic structural diagram of the split-type forming die in the present invention.

[0036] Figure 5 It is a schematic splitting diagram of the split-type forming die in the present invention.

[0037] Figure 6 It is Figure 5 a schematic internal diagram of the expansion-type positioning support mechanism in

[0038] Figure 7 It is a schematic structural diagram of the positioning piece in the present invention.

[0039] Figure 8 It is a schematic structural diagram of the circumferential seam clamping head in the present invention.

[0040] Figure 9 It is a schematic splitting diagram of the side longitudinal seam clamping mechanism in the present invention.

[0041] Figure 10 It is a schematic structural diagram of the clamping ring in the present invention.

[0042] Reference numerals in the figure:

[0043] 1 - Cover body, 2 - Side enclosure sheet body, 3 - Expanding positioning and supporting mechanism, 4 - Circumferential seam clamping head, 5 - Side longitudinal seam clamping mechanism, 6 - Longitudinal seam, 7 - Circumferential seam, 8 - First water bladder blank, 9 - Second water bladder blank, 10 - Pressing strip, 11 - Reserved hole, 12 - Third water bladder blank, 13 - Cleaning flange part, 14 - Outlet flange part, 15 - Inlet flange part, 16 - Special-shaped airdropping water bladder;

[0044] 31 - Positioning piece, 32 - Support seat, 33 - Driving seat, 34 - Driving motor, 35 - Movable connecting rod, 36 - Telescopic support column, 37 - Cover body positioning platform, 38 - Positioning column, 311 - Side arc positioning sheet body, 312 - Cover body guiding and positioning sheet body, 313 - Reserved platform;

[0045] 41 - Compression ring, 42 - Cover body pressing platform, 43 - First telescopic spring, 44 - Buckle, 45 - Snap ring, 46 - Through hole;

[0046] 51 - Clamping ring, 52 - Side clamping elastic sheet; 511 - Arc section, 512 - Arc inlay strip, 513 - Arc inlay groove, 514 - Second telescopic spring; 521 - Elastic sheet body, 522 - Upper limit block, 523 - Lower limit block, 524 - First limit groove, 525 - Second limit groove. Detailed implementation manners

[0047] In order to deepen the understanding of the present invention, the following will further elaborate on the present invention in combination with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention.

[0048] In the description of the present invention, it should be understood that the terms indicating orientation or position relationship, such as those based on the orientation or position relationship shown in the drawings, are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the structures or units referred to must have a specific orientation. Therefore, it cannot be understood as a limitation to the present invention.

[0049] In the present invention, unless otherwise clearly specified and defined, terms such as "connection", "provided with", "having", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection, or a direct connection. It can be connected through an intermediate medium. For those skilled in the art, the basic meanings of the above terms in the present invention can be understood according to specific situations.

[0050] A production process for a special-shaped airdropping water bladder using high-frequency welding, referring to Figure 1 And Figure 2 , a production process for a special-shaped airdropping water bladder using high-frequency welding, the specific steps include,

[0051] S1. Prepare the water bag substrate: Cut the special-shaped airdropped water bag substrate to obtain two upper and lower cover bodies 1 and N side enclosure sheets 2;

[0052] S2. Position the segmented forming die: Refer to Figure 4 , the segmented forming die includes an expanding positioning support mechanism 3, an annular seam clamping head 4, and a side longitudinal seam clamping mechanism 5 arranged in sequence from bottom to top;

[0053] The expanding positioning support mechanism 3 includes a plurality of positioning pieces 31 that contract or expand synchronously;

[0054] The side longitudinal seam clamping mechanism 5 includes a clamping ring 51 sleeved on the middle part of the outer circumference of a plurality of positioning pieces 31, and there are a plurality of side clamping elastic pieces 52 between the annular seam clamping head 4 and the clamping ring 51;

[0055] S3. Position the water bag substrate: Select N - 1 side enclosure sheets 2 and one cover body 1, attach the N - 1 side enclosure sheets 2 to the outer end faces of a plurality of positioning pieces 31, the adjacent two side enclosure sheets 2 are overlapped end to end to form a longitudinal seam, sleeved the clamping ring 51 on the middle position outside the plurality of positioning pieces 31, position the cover body 1 on the upper ends of the plurality of side enclosure sheets 2, and the outer edge of the cover body 1 and the upper end faces of the plurality of side enclosure sheets 2 are overlapped up and down to form an annular seam 7;

[0056] S4. Clamp the water bag substrate: The annular seam clamping head 4 clamps the annular seam 7, install the side clamping elastic pieces 52, and complete the clamping of the longitudinal seam 6 between the adjacent two side enclosure sheets 2;

[0057] S5. High-frequency welding: Place the segmented forming die as a whole in a high-frequency welding machine, and use the high-frequency electromagnetic field to complete the longitudinal and annular seam welding of N - 1 side enclosure sheets 2 and one cover body 1 to form a water bag blank 8;

[0058] S6. Weld the other cover body 1: Take out the water bag blank 8 from the segmented forming die, exchange the up and down position of the water bag blank 8, and complete the welding with the other cover body 1 to form a water bag blank 9;

[0059] S7. The plurality of positioning pieces 31 contract, and take out the segmented forming die; splice the last side enclosure sheet 2 with the water bag blank 9, and place it in the high-frequency welding machine to complete the welding of the splicing seam.

[0060] The present invention changes the traditional splicing and welding process of the integral side enclosing sheet body 2 and the two cover bodies 1. The multiple side enclosing sheet bodies 2 and the two cover bodies 1 are positioned and clamped on a split-type forming die that can be contracted or expanded, improving the positioning and splicing accuracy. After the splicing seam is welded on a high-frequency welder, the split-type forming die contracts and is taken out, and then the last side enclosing sheet body 2 is positioned and welded, quickly realizing the positioning welding of the special-shaped airdrop water bag and the blanking of the special-shaped airdrop water bag on the split-type forming die, avoiding the influence on product performance caused by manual bonding, and thus ensuring the delivery accuracy of the special-shaped airdrop water bag.

[0061] The present invention realizes the automatic positioning welding of the special-shaped airdrop water bag through the split-type positioning of the multiple split side enclosing sheet bodies 2 and the cover bodies 1 on the split-type forming die, synchronously realizes the positioning welding of multiple longitudinal seams 6 and a single circumferential seam 7. At the same time, the expansion-type positioning support mechanism of the split-type forming die can realize the support and positioning of the side enclosing sheet bodies 2 of different sizes through contraction or expansion, meeting the production and processing of special-shaped airdrop water bags of different specifications.

[0062] When the high-frequency welder welds the longitudinal seam 6 and the circumferential seam 7 formed between the cover body 1 and the side enclosing sheet body 2, the high-frequency welder acts on the cover body 1 and the side enclosing sheet body 2 with an electromagnetic field, and uses the high-frequency electromagnetic field to make the internal molecules of the mutually contacting base materials collide violently with each other to generate high temperature, thereby realizing the welding of the longitudinal seam 6 and the circumferential seam 7.

[0063] On the basis of this embodiment, the specific steps of step S3 are as follows: first, position the lower end of the side clamping spring piece 52 on the clamping ring 51, then place the circumferential seam clamping press head 4 on the upper ends of the multiple positioning pieces 31. At the same time, the upper end of the side clamping spring piece 52 is embedded in the circumferential seam clamping press head 4, and the circumferential seam clamping press head 4 clamps the circumferential seam 7, and the side clamping spring piece 52 clamps the longitudinal seam 6 between two adjacent side enclosing sheet bodies 2.

[0064] In this embodiment, the clamping ring 51 clamps and positions the outer circle center position of the multiple side enclosing sheet bodies 2 on the outer walls of the multiple positioning pieces 31 (there is a clearance fit between the clamping ring 51 and the multiple positioning pieces 31). The upper ends of the side enclosing sheet bodies 2 are placed at the upper end face positions of the positioning pieces 31. The lower end of the side clamping spring piece 52 is embedded in the clamping ring 51. The outer end face of a cover body 1 is positioned on the upper end face of the multiple positioning pieces 31, and the outer end of the cover body 1 and the upper ends of the multiple side enclosing sheet bodies 2 are stacked up and down to form a circumferential seam 7. Place the circumferential seam clamping press head 4 on the upper end face of the multiple positioning pieces 31 and cooperate with the positioning pieces 31, and clamp the circumferential seam 7. At the same time, during the positioning process of the circumferential seam clamping press head 4 and the positioning pieces 31, they cooperate with the multiple side clamping spring pieces 52. Under the action of its own gravity, the multiple side clamping spring pieces 52 press the longitudinal seam 6 between two adjacent side enclosing sheet bodies 2.

[0065] It should be noted that the side end portions of two adjacent side enclosing sheets 2 are superposed with each other to form a longitudinal seam 6. When positioning and clamping the ring 51 and the circumferential seam clamping head 4, ensure that the side clamping spring piece 52 is in the correct position corresponding to the longitudinal seam 6, so as to facilitate clamping the longitudinal seam 6 between two adjacent side enclosing sheets 2 by the side clamping spring piece 52.

[0066] Based on this embodiment, the specific steps of step S8 are as follows:

[0067] S71. Position and pre - splice the last side enclosing sheet 2 and the second water - bag blank 9 on the split - type forming die, mark the contact points of the two, remove the last side enclosing sheet 2, the expansion - type positioning support mechanism 3 retracts inward as a whole, and take out the split - type forming die;

[0068] S72. Manually position the side enclosing sheet 2 and the second water - bag blank 9 again according to the marks in S71. Take an arc - shaped pressing strip 10, place the pressing strip 10 inside the splicing seam of the side enclosing sheet 2 and the second water - bag blank 9, place it in the high - frequency welder and clamp the outside of the splicing seam, and complete the welding to form the third water - bag blank 12;

[0069] S73. After sequentially performing high - frequency welding on multiple splicing seams, take out the pressing strip 10 from the reserved hole 11 of a cover body 1;

[0070] S74. Install a cleaning flange 13, a water - outlet flange 14, and a water - inlet flange 15 at the reserved holes 11 of the two cover bodies 1 of the third water - bag blank 12 to obtain a special - shaped airdrop water - bag 16.

[0071] It should be noted that after welding the upper and lower cover bodies 1 and multiple side enclosing sheets 2 in this application, the second water - bag blank 9 is formed. The second water - bag blank 9 has a position cavity convenient for taking out the split - type forming die and a reserved positioning position for the last side enclosing sheet 2. Before taking out the split - type forming die, the last side enclosing sheet 2 marks its position under the support of the expansion - type positioning support mechanism 3. After taking out the split - type forming die, the last side enclosing sheet 2 is manually positioned with the side enclosing sheets 2 on both sides and the cover bodies 1 on the upper and lower sides according to the marks, and each longitudinal seam 6 or circumferential seam 7 is sequentially clamped and welded by an internal pressing strip 10 and an external pressing block of the high - frequency machine.

[0072] Based on this embodiment, referring to Figure 5 、 Figure 6 the expansion - type positioning support mechanism 3 further includes an expansion drive group for synchronously retracting or expanding a plurality of positioning pieces 31;

[0073] The expansion driving group includes a support base 32 and a driving base 33 placed on the support base 32. A driving motor 34 is provided inside the driving base 33. A plurality of positioning pieces 31 are arranged in a ring around the outer circumference of the driving base 33. The driving end of the driving motor 34 vertically penetrates the bottom of the driving base 33. Movable connecting rods 35 are respectively hinged between the outer wall of the driving base 33, the outer wall of the driving end of the driving motor 34 and the corresponding positioning pieces 31. When the driving motor 34 expands and contracts, the corresponding movable connecting rods 35 rotate, so as to realize the synchronous retraction or expansion of the plurality of positioning pieces 31.

[0074] On the basis of this embodiment, referring to Figure 7 , the positioning piece 31 includes a side arc positioning piece body 311 and a cover body guiding positioning piece body 312 placed on the upper side end of the side arc positioning piece body 311. There is a reserved platform 313 between the cover body guiding positioning piece body 312 and the outer side end face of the positioning piece 31 for the upper ends of the side enclosing piece bodies 2 and the lower ends of the cover body 1 to fit together.

[0075] Among them, after a plurality of side enclosing piece bodies 2 are positioned on the positioning piece 31, their upper ends are all positioned in the reserved platform 313, and the outer edge of the cover body 1 is also placed at the reserved platform 313. Through the setting of the reserved platform, the position accuracy of the annular splicing of the plurality of side enclosing piece bodies 2 and the cover body 1 is initially realized, and at the same time, the width consistency of the overall girth weld is ensured.

[0076] On the basis of this embodiment, there are a plurality of telescopic support columns 36 between the lower end of the driving base 33 and the support base 32. The movable connecting rod 35 placed on the lower side passes through two adjacent telescopic support columns 36 and is connected to the corresponding positioning piece 31. The upper end of the driving base 33 has a cover body positioning platform 37. The center of the upper end of the cover body positioning platform 37 has a positioning column 38 for embedding the reserved hole 11 at the center position of the cover body 1. The cover body guiding positioning piece body 312 extends in an arc shape towards the cover body positioning platform 37.

[0077] Among them, the cover body 1 is placed on the cover body positioning platform 37. The positioning column 38 at the center of the upper end of the cover body positioning platform 37 penetrates the reserved hole 11 at the center of the cover body 1 to perform circumferential limit on the cover body 1. When the cover body 1 and the end of the side enclosing piece body 2 are spliced and positioned, the girth weld clamping head 4 is placed above the cover body positioning platform 37, and the girth weld clamping head 4 uses its own gravity to clamp the girth weld.

[0078] On the basis of this embodiment, referring to Figure 8 , the girth weld clamping head 4 includes a pressing ring 41 embedded in the reserved platform 313 and a cover body pressing platform 42 placed at the center position inside the pressing ring 41. The cover body pressing platform 42 and the pressing ring 41 are detachably connected by a plurality of first telescopic springs 43. The center of the pressing ring 41 has a through hole 46 for the positioning column 38 to penetrate.

[0079] On the basis of this embodiment, a plurality of first telescopic springs 43 are arranged around the outer end of the capping body pressing table 42. One end of the first telescopic spring 43 is fixed to the capping body pressing table 42, and the other end of the first telescopic spring 43 has a buckle 44. The inner wall of the pressing ring 41 has a retaining ring 45 that mates with the buckle 44.

[0080] On the basis of this embodiment, with reference to Figure 9 , the side clamping elastic sheet 52 includes an elastic sheet body 521, an upper limit block 522 disposed at the upper end of the elastic sheet body 521, and a lower limit block 523 disposed at the lower end of the elastic sheet body 521. The pressing ring 41 has a first limiting groove 524 for the upper limit block 522 to be embedded, and the clamping ring 51 has a second limiting groove 525 for the lower limit block 523 to be embedded. During installation, the upper limit block 522 on the elastic sheet body 521 cooperates with the first limiting groove 524, and the lower limit block 523 cooperates with the second limiting groove 525, thus completing the mating connection of the side clamping elastic sheet 52 with the pressing ring 41 and the clamping ring 51. It can also be further clamped and fixed by bolts to ensure the position accuracy of the elastic sheet body 521 and prevent deviation during the positioning of the side surrounding sheet body 2.

[0081] On the basis of this embodiment, with reference to Figure 10 , both the clamping ring 51 and the pressing ring 41 achieve circumferential changes through telescopic connection groups. The telescopic connection group is formed by enclosing a plurality of arc segments 511. One end of the arc segment 511 has an arc-shaped insert 512, and the other end of the arc segment 511 has an arc-shaped insert groove 513. The arc-shaped inserts 512 and arc-shaped insert grooves 513 of adjacent two arc segments 511 cooperate with each other, and there is a second telescopic spring 514 between adjacent two arc segments 511.

[0082] The expandable positioning and supporting mechanism 3 in this application can be retracted or expanded, so it can be applied to the splicing and positioning of capping bodies 1 and side surrounding sheet bodies 2 of different sizes. To ensure the clamping effect, the clamping ring 51 and the pressing ring 41 are telescoped to the diameter sizes that match them.

[0083] Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A production process for special-shaped airdrop water bags using high-frequency welding, characterized in that: The specific steps include: S1. Prepare the water bag substrate: Cut the special-shaped airdropped water bag substrate to obtain two upper and lower cover bodies and N side enclosing sheets; S2. Position the segmented forming die: The segmented forming die includes an expanding positioning support mechanism, a circumferential seam clamping head, and a side longitudinal seam clamping mechanism arranged in sequence from bottom to top; The expanding positioning support mechanism includes a plurality of positioning sheets that synchronously contract or expand; The side longitudinal seam clamping mechanism includes a clamping ring sleeved on the middle part of the outer circumference of a plurality of positioning sheets, and there are a plurality of side clamping elastic sheets between the circumferential seam clamping head and the clamping ring; S3. Position the water bag substrate: Select N - 1 side enclosing sheets and one cover body. Attach the N - 1 side enclosing sheets to the outer end faces of a plurality of positioning sheets. The adjacent two side enclosing sheets are overlapped end to end to form a longitudinal seam. Sleeve the clamping ring on the middle position outside the plurality of positioning sheets. Position the cover body at the upper end of the N - 1 side enclosing sheets. The outer edge of the cover body and the upper end faces of the N - 1 side enclosing sheets are overlapped up and down to form a circumferential seam; S4. Clamp the water bag substrate: The circumferential seam clamping head clamps the circumferential seam, install the side clamping elastic sheets, and complete the clamping of the longitudinal seam between the adjacent two side enclosing sheets; S5. High-frequency welding: Place the segmented forming die as a whole in a high-frequency welding machine, and use the high-frequency electromagnetic field to complete the longitudinal and circumferential seam welding of N - 1 side enclosing sheets and one cover body to form the first water bag blank; S6. Weld the other cover body: Take out the first water bag blank from the segmented forming die, exchange the up and down position of the first water bag blank, and complete the welding with the other cover body to form the second water bag blank; S7. The plurality of positioning sheets contract, and take out the segmented forming die; splice the last side enclosing sheet with the second water bag blank, and place it in the high-frequency welding machine to complete the welding of the splicing seam.

2. The production process of a special-shaped airdrop water bag using high-frequency welding according to claim 1, wherein: The specific steps of step S3 are as follows: First, position the lower end of the side clamping elastic sheet on the clamping ring, then place the circumferential seam clamping head on the upper end of the plurality of positioning sheets. At the same time, the upper end of the side clamping elastic sheet is embedded in the circumferential seam clamping head. The circumferential seam clamping head clamps the circumferential seam, and the side clamping elastic sheet clamps the longitudinal seam between the adjacent two side enclosing sheets.

3. The production process of a special-shaped airdrop water bag using high-frequency welding according to claim 2, characterized in that: The specific steps of step S7 are as follows: S71. Position and pre-splice the last side enclosing sheet and the second water bag blank on the segmented forming die, mark the contact points of the two, remove the last side enclosing sheet, the expanding positioning support mechanism contracts as a whole, and take out the segmented forming die; S72. Manually position the side enclosing sheet and the second water bag blank again according to the marks in S71. Take an arc-shaped pressing strip, place the pressing strip on the inner side of the splicing seam between the side enclosing sheet and the second water bag blank, place it in the high-frequency welding machine and clamp the outside of the splicing seam, and complete the welding to form the third water bag blank; S73. After performing high-frequency welding on a plurality of splicing seams in sequence, take out the pressing strip from the reserved hole of one cover body; S74. Install a cleaning flange, a water outlet flange, and a water inlet flange at the reserved holes of the two cover bodies of the third water bag blank to obtain a special-shaped airdropped water bag.

4. The production process of a special-shaped airdrop water bag using high-frequency welding according to claim 3, characterized in that: The expansion type positioning and supporting mechanism further includes an expansion driving group for synchronously retracting or expanding a plurality of positioning pieces; The expansion driving group includes a support base and a driving base placed on the support base. A driving motor is provided inside the driving base. The plurality of positioning pieces are arranged in a ring around the outer circumference of the driving base. The driving end of the driving motor vertically penetrates the bottom of the driving base. An active connecting rod is respectively hinged between the outer wall of the driving base, the outer wall of the driving end of the driving motor and the corresponding positioning piece. When the driving motor expands and contracts, the corresponding active connecting rod rotates, so as to realize the synchronous retraction or expansion of the plurality of positioning pieces.

5. The production process of a special-shaped airdrop water bag using high-frequency welding according to claim 4, characterized in that: The positioning piece includes a side arc positioning piece body and a cover body guiding positioning piece body placed on the upper side end of the side arc positioning piece body. There is a reserved platform between the cover body guiding positioning piece body and the outer side end face of the positioning piece for the upper end of the side enclosing piece body and the lower end of the cover body to fit together.

6. The production process of a special-shaped airdrop water bag using high-frequency welding according to claim 5, characterized in that: There are a plurality of telescopic support columns between the lower end of the driving base and the support base. The active connecting rod placed on the lower side passes through two adjacent telescopic support columns and is connected to the corresponding positioning piece. The upper end of the driving base has a cover body positioning platform. The center of the upper end of the cover body positioning platform has a positioning column for embedding the reserved hole at the center position of the cover body. The cover body guiding positioning piece body extends in an arc shape towards the cover body positioning platform.

7. The production process of a special-shaped airdrop water bag using high-frequency welding according to claim 5, characterized in that: The circumferential seam clamping head includes a pressing ring embedded in the reserved platform and a cover body pressing platform placed at the center position inside the pressing ring. The cover body pressing platform and the pressing ring are detachably connected by a plurality of first telescopic springs. A through hole for the positioning column to penetrate is provided at the center of the pressing ring.

8. The production process of a special-shaped airdrop water bag using high-frequency welding according to claim 7, characterized in that: The plurality of first telescopic springs are arranged in a ring around the outer side end of the cover body pressing platform. One end of the first telescopic spring is fixed to the cover body pressing platform, and the other end of the first telescopic spring has a buckle. A clamping ring matching the buckle is provided on the inner wall of the pressing ring.

9. The production process of a special-shaped airdrop water bag using high-frequency welding according to claim 8, characterized in that: The side clamping elastic sheet includes an elastic sheet body, an upper limit block placed on the upper end of the elastic sheet body and a lower limit block placed on the lower end of the elastic sheet body. A first limit groove for embedding the upper limit block is provided inside the pressing ring. A second limit groove for embedding the lower limit block is provided on the clamping ring.

10. The production process of a special-shaped airdrop water bag using high-frequency welding according to claim 9, characterized in that: Both the clamping ring and the pressing ring realize circumferential change through a telescopic connection group. The telescopic connection group is formed by enclosing a plurality of arc segments. One side end of the arc segment has an arc-shaped embedded strip, and the other side end of the arc segment has an arc-shaped embedded groove. The arc-shaped embedded strips and arc-shaped embedded grooves of two adjacent arc segments cooperate with each other, and a second telescopic spring is provided between two adjacent arc segments.

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