Special-shaped air-drop water bag production process adopting high-frequency welding

Abstract

The invention relates to a special-shaped air-drop water bag production process adopting high-frequency welding, which specifically comprises the following steps: S1, preparing a water bag base material; s2, positioning the split type forming mold; s3, positioning a water bag base material; s4, the water bag base material is clamped; s5, high-frequency welding is carried out; s6, welding the other sealing cover body; s7, the multiple positioning pieces are shrunk inwards, and the split type forming mold is taken out; and the last side body surrounding sheet body and the second water bag blank are spliced and placed in a high-frequency welding machine, and welding of a splicing seam is completed. Compared with the prior art, the special-shaped air-drop water bag welding device has the following advantages that automatic welding of the special-shaped air-drop water bag is achieved through split type positioning of the side surrounding piece bodies and the sealing cover bodies of the multiple pieces on the piece type forming mold, the positioning and splicing precision is improved, discharging of the special-shaped air-drop water bag on the piece type forming mold is rapidly achieved, and the production efficiency is improved. And production and processing of special-shaped air-drop water bags of different specifications are met.

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 maintain vertical falling to ensure the water bag lands smoothly; 3. The water bag with a lantern-shaped structure is less affected by wind during airdrop, and can be equipped with a GPS or guiding device to improve the landing accuracy, and is suitable for delivery to the target area in disaster relief.

[0003] When processing and producing a special-shaped airdropped water bag with a lantern-shaped structure, 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 body. 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 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 by enclosing the side enclosure body of the special-shaped airdropped water bag with a lantern-shaped structure has inconsistent 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 the mold, but the side enclosure body after welding the longitudinal seam cannot be unloaded from the mold. Therefore, when the whole-piece side enclosure body is positioned and welded with the cover body, it can only be positioned and bonded manually. Therefore, 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 rotation or deviation during falling, thus 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-type forming die, the split side enclosure sheets and the split positioning of the cover body are realized, so as to achieve the automatic welding of the special-shaped airdrop water bag, improve the positioning and splicing accuracy, quickly realize the blanking of the special-shaped airdrop water bag on the split-type forming die, and meet 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, 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; S2. Position the split-type forming die: The split-type forming die includes an expansion-type positioning support mechanism, a circumferential seam clamping head, and a side longitudinal seam clamping mechanism arranged in sequence from bottom to top; The expansion-type positioning support mechanism includes a plurality of positioning pieces 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 pieces, and there are a plurality of side clamping elastic pieces between the circumferential seam clamping head and the clamping ring; 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 a plurality of positioning pieces, and the adjacent two side enclosure sheets are overlapped end to end to form a longitudinal seam. Sleeve the clamping ring on the middle position outside the plurality of positioning pieces, position the cover body at the upper end of the plurality of side enclosure sheets, and the outer edge of the cover body and the upper end faces of the plurality of side enclosure sheets are overlapped up and down to form a circumferential seam; 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 the adjacent two side enclosure sheets; S5. High-frequency welding: Place the whole split-type 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; S6. Weld the other cover body: Take out the water bag blank one from the split-type 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; S7. The plurality of positioning pieces contract, and take out the split-type forming die; splice the last side enclosure sheet with the water bag blank two, and place it in the high-frequency welding machine to complete the welding of the splicing seam.

[0006] A further improvement of the present invention lies in that: 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 annular seam clamping head on the upper ends of a plurality of positioning sheets. At the same time, the upper end of the side clamping elastic sheet is embedded in the annular seam clamping head, and the annular seam clamping head clamps the annular seam, and the side clamping elastic sheet clamps the longitudinal seam between two adjacent side enclosing sheet bodies.

[0007] A further improvement of the present invention lies in that: the specific steps of step S8 are as follows. S71. Position and pre-splice the last side enclosing sheet body and the second water bladder blank on the split forming die, mark the contact points of the two, remove the last side enclosing sheet body, the expansion type positioning and supporting mechanism retracts integrally, and take out the split forming die; S72. Manually position the side enclosing sheet body and the second water bladder blank again according to the marks in S71. Take an arc-shaped pressing strip, place the pressing strip inside the splicing seam of the side enclosing sheet body and the second water bladder 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 bladder blank; S73. After sequentially performing high-frequency welding on a plurality of splicing seams, take out the pressing strip from the reserved hole of a cover body; 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 bladder blank to obtain a special-shaped airdrop water bladder.

[0008] A further improvement of the present invention lies in that: the expansion type positioning and supporting mechanism further includes an expansion driving group for synchronously retracting or expanding a plurality of positioning sheets; The expansion driving group includes a support seat and a driving seat placed on the support seat. The driving seat has a driving motor inside. A plurality of positioning sheets are arranged around the outer circumference of the driving seat. The driving end of the driving motor vertically penetrates the bottom of the driving seat. Activity linkages are respectively hinged between the outer wall of the driving seat, the outer wall of the driving end of the driving motor and the corresponding positioning sheet. When the driving motor expands and contracts, the corresponding activity linkages rotate, so as to realize the synchronous retraction or expansion of a plurality of positioning sheets.

[0009] A further improvement of the present invention lies in that: the positioning sheet includes a side arc positioning sheet body and a cover body guiding positioning sheet body placed on the upper side end of the side arc positioning sheet body. There is a reserved platform between the cover body guiding positioning sheet body and the outer side end face of the positioning sheet for the upper end of the side enclosing sheet body and the lower end of the cover body to fit together.

[0010] 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 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 seat has a positioning platform for the cover body. The center of the upper end of the positioning platform for the cover body has a positioning column for embedding the reserved hole at the center position of the cover body. The cover body guiding and positioning piece body extends in an arc shape towards the direction of the positioning platform for the cover body.

[0011] A further improvement of the present invention lies in that: the circumferential seam clamping press head includes a pressing ring embedded in the reserved table and a cover body pressing table placed at the center position inside the pressing ring. The cover body pressing table and the pressing ring are detachably connected through a plurality of first telescopic springs. The center of the pressing ring has a through hole for the positioning column to penetrate.

[0012] A further improvement of the present invention lies in that: a plurality of first telescopic springs are arranged in a ring on the outer side end of the cover body pressing table. One end of the first telescopic spring is fixed to the cover body pressing table, and the other end of the first telescopic spring has a buckle. The inner wall of the pressing ring has a snap ring that matches the buckle.

[0013] A further improvement of the present invention lies in that: the side clamping elastic piece includes an elastic piece body, an upper limit block placed at the upper end of the elastic piece body, and a lower limit block placed at the lower end of the elastic piece body. The pressing ring has a first limit groove for embedding the upper limit block, and the clamping ring has a second limit groove for embedding the lower limit block.

[0014] A further improvement of the present invention lies in that: both the clamping ring and the pressing ring realize circumferential changes through telescopic connection groups. The telescopic connection groups are formed by enclosing 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.

[0015] The present invention has the following advantages compared with the prior art: 1. The present invention changes the traditional splicing and welding process of the whole-piece side surrounding body and two cover bodies. It positions and clamps a plurality of side surrounding pieces and two cover bodies on a split-type forming mold that can be contracted or expanded, improves the positioning and splicing accuracy. After completing the splicing seam welding on the high-frequency welder, the split-type forming mold contracts and is taken out, then the last side surrounding piece is positioned and welded. It quickly realizes 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 mold, avoiding the influence on product performance caused by manual bonding, thereby ensuring the delivery accuracy of the special-shaped airdrop water bag.

[0016] 2. The present invention realizes the automatic positioning welding of the special-shaped airdropped water bag by the split positioning of multiple side enclosure sheets and the cover body on the split forming die, synchronously realizes the positioning welding of multiple longitudinal seams and a single circumferential seam. At the same time, the expansion type positioning and supporting mechanism of the split forming die can support and position the side enclosure sheets of different sizes by contraction or expansion, meeting the production and processing of special-shaped airdropped water bags of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the special-shaped airdropped water bag in the present invention.

[0018] Figure 2 It is a schematic production process diagram of the special-shaped airdropped water bag in the present invention.

[0019] Figure 3 It is a schematic position diagram of the pressing strip at the longitudinal seam in the present invention.

[0020] Figure 4 It is a schematic structural diagram of the split forming die in the present invention.

[0021] Figure 5 It is a split schematic diagram of the split forming die in the present invention.

[0022] Figure 6 For Figure 5 the internal schematic diagram of the expansion type positioning and supporting mechanism.

[0023] Figure 7 It is a schematic structural diagram of the positioning piece in the present invention.

[0024] Figure 8 It is a schematic structural diagram of the circumferential seam clamping head in the present invention.

[0025] Figure 9 It is a split schematic diagram of the side longitudinal seam clamping mechanism in the present invention.

[0026] Figure 10 It is a schematic structural diagram of the clamping ring in the present invention.

[0027] Reference numerals in the figure: 1 - cover body, 2 - side enclosure sheet, 3 - expansion type positioning and supporting mechanism, 4 - circumferential seam clamping head, 5 - side longitudinal seam clamping mechanism, 6 - longitudinal seam, 7 - circumferential seam, 8 - first water bag blank, 9 - second water bag blank, 10 - pressing strip, 11 - reserved hole, 12 - third water bag blank, 13 - special-shaped airdropped water bag; 31 - Positioning piece, 32 - Support base, 33 - Driving base, 34 - Driving motor, 35 - Movable connecting rod, 36 - Telescopic support column, 37 - Cover body positioning platform, 38 - Positioning column, 311 - Side arc positioning piece body, 312 - Cover body guiding positioning piece body, 313 - Reserved platform; 41 - Compression ring, 42 - Cover body compression platform, 43 - First telescopic spring, 44 - Buckle, 45 - Snap ring, 46 - Through hole; 51 - Clamping ring, 52 - Side clamping elastic piece; 511 - Arc section, 512 - Arc insert strip, 513 - Arc insert groove, 514 - Second telescopic spring; 521 - Elastic piece body, 522 - Upper limit block, 523 - Lower limit block, 524 - First limit groove, 525 - Second limit groove. Specific embodiments

[0028] To deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction 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.

[0029] 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.

[0030] In the present invention, unless otherwise clearly specified and limited, terms such as "connection", "provided with", "having" 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.

[0031] A production process for special-shaped airdropped water bags using high-frequency welding, referring to Figure 1 And Figure 2 , a production process for special-shaped airdropped water bags using high-frequency welding, the specific steps include, S1. Prepare the water bag base material: Cut the special-shaped airdropped water bag base material to obtain two upper and lower cover bodies 1 and N side surrounding sheet bodies 2; 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; The expanding positioning support mechanism 3 includes a plurality of positioning pieces 31 that contract or expand synchronously; 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 press head 4 and the clamping ring 51; S3. Positioning the water bag base material: Select N - 1 side surrounding sheet bodies 2 and a cover body 1. Attach the N - 1 side surrounding sheet bodies 2 to the outer end faces of a plurality of positioning pieces 31. The adjacent two side surrounding sheet bodies 2 are overlapped end to end to form a longitudinal seam. Sleeve the clamping ring 51 on the outer middle position of the plurality of positioning pieces 31. Position the cover body 1 at the upper ends of the plurality of side surrounding sheet bodies 2. The outer edge of the cover body 1 and the upper end faces of the plurality of side surrounding sheet bodies 2 are overlapped up and down to form an annular seam 7; S4. Clamping the water bag base material: The annular seam clamping press head 4 clamps the annular seam 7, and installs the side clamping elastic pieces 52 to complete the clamping of the longitudinal seam 7 between the adjacent two side surrounding sheet bodies 2; S5. High - frequency welding: Place the split - type 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 the N - 1 side surrounding sheet bodies 2 and a cover body 1 to form a water bag blank 8; S6. Welding another cover body 1: Take out the water bag blank 8 from the split - type forming die, swap the up - down position of the water bag blank 8, and complete the welding with another cover body 1 to form a water bag blank 9; S7. The plurality of positioning pieces 31 contract, and take out the split - type forming die; splice the last side surrounding sheet body 2 with the water bag blank 9, and place it in the high - frequency welding machine to complete the welding of the splicing seam.

[0032] The present invention changes the traditional splicing and welding process of the whole - piece side surrounding body 2 and two cover bodies 1. Position and clamp the plurality of side surrounding sheet bodies 2 and two cover bodies 1 on the expandable or contractible split - type forming die to improve the positioning and splicing accuracy. After completing the splicing seam welding on the high - frequency welding machine, the split - type forming die contracts and is taken out, and then the last side surrounding 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, thereby ensuring the delivery accuracy of the special - shaped airdrop water bag.

[0033] The present invention realizes the automatic positioning welding of the special - shaped airdrop water bag through the split - type positioning of the plurality of split side surrounding sheet bodies 2 and the cover body 1 on the split - type forming die, synchronously realizes the positioning welding of a plurality of longitudinal seams 6 and a single annular seam 7. At the same time, the expandable positioning support mechanism of the split - type forming die can realize the support and positioning of the side surrounding sheet bodies 2 with different sizes through contraction or expansion, meeting the production and processing of special - shaped airdrop water bags with different specifications.

[0034] When the high-frequency welder welds the longitudinal seam 6 and the circumferential seam 7 formed between the cover body 1 and the side surrounding sheet body 2, the high-frequency welder applies an electromagnetic field to the cover body 1 and the side surrounding sheet body 2, and uses the high-frequency electromagnetic field to cause the internal molecules of the mutually contacting base materials to collide violently with each other to generate high temperature, thereby realizing the welding of the longitudinal seam 6 and the circumferential seam 7.

[0035] On the basis of this embodiment, the specific steps of step S3 are as follows: first, position the lower end of the side clamping elastic piece 52 on the clamping ring 51, then place the circumferential seam clamping head 4 on the upper ends of the plurality of positioning pieces 31. At the same time, the upper end of the side clamping elastic piece 52 is embedded in the circumferential seam clamping head 4, and the circumferential seam clamping head 4 clamps the circumferential seam 7, and the side clamping elastic piece 52 clamps the longitudinal seam 6 between two adjacent side surrounding sheet bodies 2.

[0036] In this embodiment, the clamping ring 51 clamps and positions the outer circle center positions of the plurality of side surrounding sheet bodies 2 on the outer walls of the plurality of positioning pieces 31 (there is a clearance fit between the clamping ring 51 and the plurality of positioning pieces 31). The upper ends of the side surrounding sheet bodies 2 are placed at the upper end face positions of the positioning pieces 31. The lower end of the side clamping elastic piece 52 is embedded in the clamping ring 51. The outer end face of a cover body 1 is positioned on the upper end faces of the plurality of positioning pieces 31, and the outer end of the cover body 1 and the upper ends of the plurality of side surrounding sheet bodies 2 are stacked up and down to form the circumferential seam 7. Place the circumferential seam clamping head 4 on the upper end faces of the plurality of 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 head 4 and the positioning pieces 31, they cooperate with the plurality of side clamping elastic pieces 52. Under the action of its own gravity, the plurality of side clamping elastic pieces 52 press the longitudinal seam 6 between two adjacent side surrounding sheet bodies 2.

[0037] It should be noted that the side end parts of two adjacent side surrounding sheet bodies 2 overlap each other to form the longitudinal seam 6. When positioning and clamping the clamping ring 51 and the circumferential seam clamping head 4, ensure that the side clamping elastic piece 52 is in the correct position corresponding to the longitudinal seam 6, which is convenient for the side clamping elastic piece 52 to clamp the longitudinal seam 6 between two adjacent side surrounding sheet bodies 2.

[0038] On the basis of this embodiment, the specific steps of step S8 are as follows: S71. Position and pre-splice the last side surrounding sheet body 2 and the water bladder blank two 9 on the segmented forming die, mark the contact points of the two, remove the last side surrounding sheet body 2, the expansion type positioning support mechanism 3 retracts as a whole, and take out the segmented forming die; S72. Manually position the side enclosure sheet 2 and the second water bag blank 9 again according to the marked position in S71. Take the arc-shaped pressing strip 10, place the pressing strip 10 inside the splicing seam of the side enclosure sheet 2 and the second water bag blank 9, place it in the high-frequency welder, clamp the outside of the splicing seam, and complete the welding to form the third water bag blank 12; S73. After performing high-frequency welding on multiple splicing seams in sequence, take out the pressing strip 10 from the reserved hole 11 of a cover body 1; S74. Install the cleaning flange 13, the water outlet flange 14, and the water inlet flange 15 at the reserved holes 11 of the two cover bodies 1 of the third water bag blank 12 to obtain the special-shaped airdrop water bag 16.

[0039] It should be noted that in this application, after welding the upper and lower cover bodies 1 and multiple side enclosure sheets 2, the second water bag blank 9 is formed. The second water bag blank 9 has a position cavity for facilitating the removal of the segmented forming die and the reserved positioning position of the last side enclosure sheet 2. Before the segmented forming die is removed, the position of the last side enclosure sheet 2 is marked under the support of the expansion type positioning support mechanism 3. After the segmented forming die is removed, the last side enclosure sheet 2 is manually positioned with the side enclosure sheets 2 on both sides and the cover bodies 1 on the upper and lower sides according to the mark. Each longitudinal seam 6 or circumferential seam 7 is successively clamped and welded by the internal pressing strip 10 and the pressing block of the high-frequency machine outside.

[0040] On the basis of 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 multiple positioning pieces 31; The expansion drive group includes a support seat 32 and a drive seat 33 placed on the support seat 32. The drive seat 33 is provided with a drive motor 34 inside. Multiple positioning pieces 31 are arranged in a ring on the outer circumference of the drive seat 33. The drive end of the drive motor 34 vertically penetrates the bottom of the drive seat 33. An active connecting rod 35 is respectively hinged between the outer wall of the drive seat 33, the outer wall of the drive end of the drive motor 34, and the corresponding positioning piece 31. When the drive motor 34 expands and contracts, the corresponding active connecting rod 35 rotates, so as to realize the synchronous retraction or expansion of multiple positioning pieces 31.

[0041] On the basis of this embodiment, referring to Figure 7 , the positioning piece 31 includes a side arc positioning sheet body 311 and a cover body guiding positioning sheet body 312 placed on the upper side end of the side arc positioning sheet body 311. There is a reserved platform 313 between the cover body guiding positioning sheet body 312 and the outer end face of the positioning piece 31 for the upper end of the side enclosure sheet 2 and the lower end of the cover body 1 to fit together.

[0042] After multiple side enclosing sheets 2 are positioned on the positioning sheet 31, their upper ends are all positioned within 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 multiple side enclosing sheets 2 and the cover body 1 is initially achieved, and at the same time, the width consistency of the overall circumferential seam is ensured.

[0043] On the basis of this embodiment, there are multiple telescopic support columns 36 between the lower end of the driving seat 33 and the support seat 32. The lower movable connecting rod 35 passes through two adjacent telescopic support columns 36 and is connected to the corresponding positioning sheet 31. The upper end of the driving seat 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 central position reserved hole 11 of the cover body 1, and the cover body guiding and positioning sheet body 312 extends in an arc shape towards the cover body positioning platform 37.

[0044] 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 sheet 2 are spliced and positioned, the circumferential seam clamping head 4 is placed above the cover body positioning platform 37, and the circumferential seam clamping head 4 clamps the circumferential seam by its own gravity.

[0045] On the basis of this embodiment, referring to Figure 8 , the circumferential seam 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 multiple first telescopic springs 43. The center of the pressing ring 41 has a through hole 46 for the positioning column 38 to penetrate.

[0046] On the basis of this embodiment, multiple first telescopic springs 43 are arranged in a ring on the outer end of the cover body pressing platform 42. One end of the first telescopic spring 43 is fixed to the cover body pressing platform 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 snap ring 45 that matches the buckle 44.

[0047] On the basis of this embodiment, referring to Figure 9, the side clamping elastic piece 52 includes an elastic piece body 521, an upper limit block 522 disposed at the upper end of the elastic piece body 521, and a lower limit block 523 disposed at the lower end of the elastic piece body 521. A first limit groove 524 for embedding the upper limit block 522 is provided in the pressing ring 41, and a second limit groove 525 for embedding the lower limit block 523 is provided on the clamping ring 51. During installation, the upper limit block 522 on the elastic piece body 521 cooperates with the first limit groove 524, and the lower limit block 523 cooperates with the second limit groove 525, thus completing the mating connection between the side clamping elastic piece 52 and the pressing ring 41 and the clamping ring 51. Further clamping and fixing can also be performed through bolts to ensure the position accuracy of the elastic piece body 521, so that no deviation occurs during the positioning of the side surrounding piece 2.

[0048] Based on 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 surrounding 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 the arc-shaped insert grooves 513 of adjacent two arc segments 511 cooperate with each other, and a second telescopic spring 514 is provided between adjacent two arc segments 511.

[0049] The expandable positioning and supporting mechanism 3 in this application can be retracted or expanded, so it can be applied to the splicing positioning of capping bodies 1 and side surrounding pieces 2 with 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.

[0050] 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 airdropping 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 sheet bodies. S2. Position the segmented forming die: The segmented forming die includes an expanding positioning support mechanism, an annular 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 annular seam clamping head and the clamping ring. S3. Position the water bag substrate: Select N - 1 side enclosing sheet bodies and one cover body. Attach the N - 1 side enclosing sheet bodies to the outer end faces of a plurality of positioning sheets. The adjacent two side enclosing sheet bodies are overlapped head to tail to form a longitudinal seam. Sleeve the clamping ring on the middle position of the outer side of a plurality of positioning sheets. Position the cover body at the upper end of the N - 1 side enclosing sheet bodies. The outer edge of the cover body and the upper end faces of the N - 1 side enclosing sheet bodies are overlapped up and down to form an annular seam. S4. Clamp the water bag substrate: The annular seam clamping head clamps the annular seam, and install the side clamping elastic sheets to complete the clamping of the longitudinal seam between the adjacent two side enclosing sheet bodies. S5. High-frequency welding: Place the whole segmented forming die 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 enclosing sheet bodies 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 body 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 the special-shaped airdrop water bag using high-frequency welding according to claim 1, characterized in that: 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 annular 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 annular seam clamping head. The annular seam clamping head clamps the annular seam, and the side clamping elastic sheet clamps the longitudinal seam between the adjacent two side enclosing sheet bodies.

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 body and the second water bag blank on the segmented forming die, mark the contact points of the two, remove the last side enclosing sheet body, the whole expanding positioning support mechanism contracts, and take out the segmented forming die. S72. Manually position the side enclosing sheet body 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 of the side enclosing sheet body and the second water bag blank, place it in the high-frequency welding machine and clamp the outer side of the splicing seam, and complete the welding to form the third water bag blank. S73. After sequentially performing high-frequency welding on a plurality of splicing seams, 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 the 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 disposed on the support base. The driving base is provided with a driving motor therein. 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 disposed 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 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 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 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 penetrate through.

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. The inner wall of the pressing ring has a snap ring matching with the buckle.

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 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. The pressing ring has a first limit groove for embedding the upper limit block, and the clamping ring has a second limit groove for embedding the lower limit block.

10. The production process of the special-shaped airdrop water bag that uniformly adopts 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 embedding strip, and the other side end of the arc segment has an arc-shaped embedding groove. The arc-shaped embedding strips and arc-shaped embedding grooves of two adjacent arc segments cooperate with each other, and there is a second telescopic spring between two adjacent arc segments.

Images