A near-space large-scale sounding balloon mold and its impregnation method

Abstract

The invention discloses a near-space large-scale sounding balloon mold, comprising a wooden handle and a carambola-shaped body. The handle and the central axis of the body are coaxial and integrated. A preheating sleeve ring capable of moving and covering the handle for heating is provided at the free end of the handle. A plurality of anti-skid grooves for increasing the sliding resistance of the rubber film are provided along the axial direction at the outer periphery of the free end of the handle. The center of the handle and the central axis is hollowed out and inlaid with a densification inlay strip made of a heavy density material, so that the overall density of the mold is close to 1g / cm 3 . The mold of the present invention has a simple structure and has the advantages of small net buoyancy of the mold during dipping, not easy to shake during dipping, and not easy to slide down of the film. The present invention also provides a dipping method for a near-space large-scale sounding balloon mold, which adopts an oblique dipping method, and the angle between the central axis of the mold and the latex liquid surface is 60°-75°. The mold and dipping method of the present invention can be used to produce near-space large-scale sounding balloons with a launch altitude of 40km, 45km, and 50km. The balloon has good dipping molding, high pass rate, and good consistency.

Description

Technical Field

[0001] The invention belongs to the field of high-altitude meteorological detection, and in particular relates to a near-space large-scale sounding balloon mold and an impregnation method thereof. Background Art

[0002] Sounding balloons are the most commonly used carrier for high-altitude meteorological detection. Sounding balloons are mainly made of natural latex as the main material to make the balloon skin. They are filled with hydrogen or helium with a density lower than that of air to generate levitation power. They carry sounding instruments to detect high-altitude meteorological elements (such as temperature, humidity, air pressure, wind, etc.). Among the existing high-altitude meteorological detection methods, it is the most economical and convenient, with the safest and most effective data acquisition, the highest detection time and space resolution, and the widest coverage.

[0003] The power of a sounding balloon is derived from the fact that the density of the gas inside the balloon is less than the density of the air outside the balloon, so that the buoyancy of the balloon is greater than the weight of the system, thus providing upward power. Since the atmosphere is not evenly distributed, the air density decreases sharply with increasing altitude, and the balloon needs to provide a large enough expansion volume to maintain sufficient buoyancy to keep the balloon flying upward. Therefore, in order to achieve a higher altitude, a larger sounding balloon is needed. For example, when a balloon is launched to 50km, the density of the atmosphere at high altitude is only 0.08% of the density of the atmosphere on the ground, the balloon's expanded volume is 1,100 times the volume on the ground, the balloon skin becomes thinner to 0.8 microns, and the balloon specification is about 7,000 grams or more.

[0004] Sounding balloon molds are generally made of wood materials with a carambola-shaped structure. The material is light and easy to process. The existing technology for making large-sized balloons generally uses a small-sized balloon mold to enlarge the mold to make a large-sized balloon mold, and then makes large-sized balloons. This method has the following disadvantages:

[0005] 1. After a simple enlargement of the small-sized balloon mold, as the mold volume increases, the buoyancy generated when dipping the balloon increases exponentially. Since the mold is generally made of wood, the density is less than the latex used for dipping. Therefore, as the mold volume increases, the net buoyancy generated increases. In order to keep the mold dipping downward, the dipping machine must apply additional downward pressure to the mold or mold frame.

[0006] 2. In the prior art, pressure is generally applied to the mold or mold frame by adding weights. This method has a disadvantage in that the weight is applied on the upper part of the mold, while the mold is immersed in latex and its buoyancy center is below the latex liquid surface, which causes the center of gravity of the system to be much higher than the buoyancy center. As the size of the mold increases, the buoyancy increases, which can easily cause the mold to sway back and forth and left and right in the latex, generating bubbles and affecting the consistency of the latex gelation film.

[0007] 3. The existing technology generally adopts vertical dipping of the mold. As the mold becomes larger, the weight of the film increases, and it is very easy to slide down under the action of gravity. It is easy to produce defects such as glue strips and adhesion between the ball valves, resulting in a very low qualified rate of large-sized balloons (less than 70%).

[0008] 4. The batch-to-batch consistency of balloons made with existing technology molds is poor, and the balloon's launch height and efficiency are unstable. Summary of the invention

[0009] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a near-space large-scale sounding balloon mold and its impregnation method, which has a simple structure, small net buoyancy of the mold during impregnation, is not easy to shake during impregnation, is not easy to slide down the film, has good balloon impregnation molding, high pass rate and good consistency.

[0010] In order to solve the above technical problems, the technical solution proposed by the present invention is:

[0011] A near-space large-scale sounding balloon mold, comprising a wooden cylindrical mold handle and a carambola-shaped mold body, the handle and the center axis of the ball body are coaxial and integrated structures, the free end of the handle is provided with a preheating ring which can move and cover the handle to heat it, and the outer periphery of the free end of the handle is provided with a plurality of anti-slip grooves along the axial direction; the center of the handle and the center axis is hollowed out and inlaid with a densification inlay strip of heavy-density material, so that the overall density of the mold is close to 1g / cm3.

[0012] As a further improvement of the above technical solution:

[0013] Preferably, the ring is a circular ring with a jacket that can pass hot water, which includes a circular outer cylinder and a circular inner cylinder sleeved in the outer cylinder, the two ends between the inner cylinder and the outer cylinder are closed into an integral structure to form the jacket, and the two ends on the opposite sides of the outer cylinder are respectively provided with a water inlet and a water outlet that are connected to the inner cavity of the jacket.

[0014] Preferably, a cylindrical ring slide rod is coaxially fixed to the middle part of the free end of the ball handle, and a support column for supporting the ring is respectively provided on two opposite sides of the end of the ring slide rod away from the ball handle; an end of the ring away from the ball handle is provided with an end cover with a circular center through hole, and the ring is slid through the ring slide rod through the center through hole; the opposite sides of the center through hole are radially recessed to form a rotational sliding groove that can pass through the support column, and a ring limiter for clamping the support column is respectively provided on two opposite sides below the center through hole where the rotational sliding groove is not provided, and the ring limiter contacts with the outer side of the ring slide rod so that the distance between the inner wall of the ring and the outer wall of the ball handle is maintained at 3-5mm.

[0015] Preferably, the free end of the sleeve slide rod is also fixedly connected to an inclined mold frame fixing screw, and the angle between the mold frame fixing screw and the horizontal plane is 60°-75°.

[0016] Preferably, the anti-slip grooves on the handle have a depth of 1-3 mm and a width of 1-5 mm; the number of the anti-slip grooves is 3-5, and the interval between adjacent anti-slip grooves is 5 mm-6 mm.

[0017] Preferably, the heavy density material is metal iron, aluminum or copper.

[0018] Preferably, the carambola-shaped spherical body has 8-11 petals and an aspect ratio of 1.45-1.65.

[0019] The present invention also provides a dipping method for the large-scale near-space sounding balloon mold as described above, wherein the dipping method is oblique dipping, and during the oblique dipping, the angle between the large-scale near-space sounding balloon mold and the latex liquid surface is 60°-75°.

[0020] In the above-mentioned dipping method, when dipping begins, the entire ball body of the mold and most of the ball handle are immersed in latex, and the ring is located above the latex and does not touch the latex; after dipping for a suitable time and until the ball handle has a suitable thickness, the mold is lifted until the ball handle is completely exposed to the latex, and the lifting is stopped; the ring is moved along the ring sliding rod to cover the ball handle, and circulating hot water is pre-passed through the jacket of the ring to heat the rubber film at the ball handle; after the ball body is immersed to a suitable thickness, the mold is lifted out to complete the dipping.

[0021] In the above-mentioned dipping method, the angle between the mold and the latex liquid surface is formed by vertically installing the mold frame fixing screw on the horizontally arranged mold frame, and the top of the mold frame fixing screw passes through the installation through hole provided on the mold frame and is fastened to the top of the mold frame through a fixing nut.

[0022] Compared with the prior art, the advantages of the present invention are:

[0023] 1. The mold of the present invention hollows out the central axis of the mold and inlays a densification inlay strip made of a heavy density material, so that the mold itself increases its own weight, thereby effectively reducing the net buoyancy of the mold immersed in latex, and no additional external force is required during immersion, which can reduce the load of the impregnation machine; and the center of gravity and the center of buoyancy of the mold can be kept close to avoid shaking of the mold during the impregnation process, which can reduce defects such as bubbles in balloon production;

[0024] 2. The mold of the present invention can increase the sliding resistance of the rubber film by providing anti-slip grooves on the handle;

[0025] 3. The mold of the present invention can preheat the ball handle film by providing a movable preheating ring that can pass hot water, thereby improving the strength of the film and reducing the demoulding breakage rate;

[0026] 4. The dipping method of the present invention can further reduce the downward movement of the adhesive film by dipping obliquely, thereby effectively reducing defects such as adhesion and adhesive strips in balloon production.

[0027] In summary, the mold and impregnation method of the present invention can comprehensively improve the production qualification rate of balloons and the quality consistency of products while reducing the operating load of the impregnation machine equipment, and can be used to produce large-scale sounding balloons in near-space with a launch altitude of 40km, 45km, and 50km. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of the mold of Example 1 of the present invention.

[0029] Figure 2 It is an enlarged schematic diagram of the cross-sectional structure of the ball body in the mold of Example 1 of the present invention.

[0030] Figure 3 It is a schematic diagram of the main cross-sectional structure of the preheating ring in the mold of Example 1 of the present invention.

[0031] Figure 4 It is a schematic diagram of the top view of the structure of the sleeve ring in the mold of Example 1 of the present invention.

[0032] Figure 5 It is a schematic diagram of the enlarged local structure of the connection between the collar and the collar slide rod in the mold of Example 1 of the present invention.

[0033] Figure 6 It is a schematic diagram of the installation structure of the mold in Example 2 of the present invention when it is used.

[0034] Legend:

[0035] 1. Ball handle; 2. Ball body; 3. Anti-slip groove; 4. Ring; 5. Densification inlay strip; 6. Ring slide bar; 7. Water inlet; 8. Water outlet; 9. Ring limiter; 10. Mold frame fixing screw; 11. Ball petal; 12. Mold frame; 13. Fixing nut; 41. Outer cylinder; 42. Inner cylinder; 43. Rotating lower slide. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively and meticulously below in conjunction with the accompanying drawings and preferred embodiments of the present invention, but the protection scope of the present invention is not limited to the following specific embodiments.

[0037] Example 1

[0038] See also Figures 1 to 5An embodiment of a near-space large-scale sounding balloon mold of the present invention comprises a wooden mold handle 1 and a carambola-shaped body 2, wherein the handle 1 is cylindrical and the body 2 is a carambola-shaped structure with multiple petals. The handle 1 and the center axis of the body 2 are coaxial and integral structures, and the free end of the handle 1 is provided with a preheating ring 4 that can movably cover the handle 1 and heat the rubber film at the handle 1. The outer periphery of the free end of the handle 1 near the end is provided with a plurality of anti-skid grooves 3 along the axial direction to increase the resistance of the rubber film at the handle 1 to slide down; the center of the handle 1 and the center axis are hollowed out and tightly inlaid with a densification inlay strip 5 of heavy density material, so that the overall density of the mold is close to 1g / cm3. The mold of the present invention has a simple structure. The central axis of the mold is hollowed out and inlaid with a densification inlay strip of a heavy density material, so that the mold itself increases its own weight, thereby effectively reducing the net buoyancy of the mold immersed in latex. No additional external force is required during immersion, which can reduce the load of the impregnation machine; and the center of gravity and the center of buoyancy of the mold can be kept close to avoid shaking of the mold during the impregnation process, which can reduce defects such as bubbles in balloon production; by arranging a plurality of anti-skid grooves at the free end of the handle, the sliding resistance of the film can be increased; by arranging a preheating ring to preheat the handle film, the strength of the film at the handle can be improved, the demoulding breakage rate can be reduced, and the production qualification rate of the balloon and the quality consistency of the product can be comprehensively improved. The mold of the present invention can be used to produce large-scale near-space sounding balloons with a launch altitude of 40km, 45km, and 50km.

[0039] In this embodiment, the cross-sectional structure of the anti-slip groove 3 on the ball handle 1 is rectangular, with a depth of 1-3 mm and a width of 1-5 mm; the number of the anti-slip grooves 3 is 3-5, and the interval between adjacent anti-slip grooves 3 is 5 mm-6 mm.

[0040] In this embodiment, the heavy density material can be selected from metals such as iron, aluminum or copper. The densification inlay strip 5 can be in various shapes, preferably a cylindrical strip.

[0041] In this embodiment, the number of the petals 11 of the carambola-shaped spherical body 2 is 8-11, and the aspect ratio is 1.45-1.65.

[0042] In this embodiment, a cylindrical sleeve slide rod 6 is coaxially fixed to the middle of the free end of the ball handle 1. The cylindrical sleeve slide rod 6 is preferably made of metal and is fixed (such as welded) to the end of the densified inlay strip 5 embedded in the middle of the ball handle 1. The length of the sleeve slide rod 6 is greater than the length of the sleeve 4, and a support column perpendicular to the sleeve slide rod 6 is provided on each of the opposite sides of the end away from the ball handle 1. The end of the sleeve 4 close to the ball handle is open, and the end away from the ball handle 1 is provided with an end cover with a central through hole. The main shape of the central through hole is circular to adapt to the cylindrical shape of the sleeve slide rod 6, and the opposite sides are radially recessed to form a rotational lower slide 43. The length and width of the rotational lower slide 43 are both adapted to the support column on the sleeve slide rod 6. The ring 4 is slidably inserted into the ring slide rod 6 through its central through hole. When the ring 4 does not need to slide, the ring 4 can be rotated so that the main body of the central through hole is supported on the support column. When the ring 4 needs to slide to cover the ball handle for heating, the ring 4 is rotated so that the two lower rotating slide openings 43 are aligned with the support column, and the support limit of the support column on the ring can be released, so that the ring 4 can slide downward along the ring slide rod 6 to cover the ball handle.

[0043] In this embodiment, a set of ring limiters 9 are respectively provided on the opposite sides of the central through hole of the end cap where the rotational lower slide opening 43 is not provided, and a bayonet is provided on one side of the top of the ring limiter 9. When the ring is slid up and supported on the support column, the ring limiter 9 can clamp the corresponding side of the support column through the bayonet to prevent the ring from excessively rotating and sliding out. In this embodiment, it is preferred that the line between the two ring limiters 9 and the line between the two rotational lower slide openings 43 are perpendicular to each other, the lower end of the ring limiter 9 extends along the axial direction of the ring slide rod 6, and the inner wall of the ring limiter 9 contacts the outer side of the ring slide rod 6, which can limit the movement of the ring 4 along a straight line, so that the distance between the inner wall of the ring and the outer wall of the ball handle 1 is maintained at 3-5mm.

[0044] In this embodiment, the collar 4 is a circular collar 4 with a jacket capable of passing hot water, and its length is less than the length of the ball handle. The collar 4 includes a circular outer cylinder 41 and a circular inner cylinder 42 sleeved in the outer cylinder 41. The two ends between the inner cylinder 42 and the outer cylinder 41 are sealed into an integral structure to form a jacket capable of containing water. The two ends of the opposite sides of the outer cylinder 41 are respectively provided with a water inlet 7 and a water outlet 8. The water inlet 7 and the water outlet 8 are both connected to the inner cavity of the jacket. The water inlet 7 is connected to hot water by a hose, and circulating hot water can be passed in to heat the ball handle to increase the strength of the adhesive film there and reduce demoulding damage.

[0045] In this embodiment, the free end of the collar slide bar 6 is fixedly connected (e.g., welded) to a mold frame fixing screw 10, and the mold frame fixing screw 10 is tilted, and the angle between it and the horizontal plane is set to 60°-75°. This structure allows the mold to be tilted and placed in the latex for dipping when in use. It can further reduce the downward movement of the film and effectively reduce defects such as adhesion and strips in balloon production.

[0046] Example 2

[0047] See also Figure 6 , an embodiment of a dipping method for a near-space large-scale sounding balloon mold of the present invention, the method is an oblique dipping method, and the specific steps are:

[0048] 1. The mold frame fixing screw 10 is vertically installed on the horizontally arranged mold frame 12. The top of the mold frame fixing screw 10 passes through the installation through hole provided on the mold frame 12 and is fastened to the upper part of the mold frame 12 through the fixing nut 13, so that the large-scale sounding balloon mold in the adjacent space is tilted and placed in the latex, and the angle between the central axis of the mold and the latex liquid surface is 60°-75°;

[0049] 2. When dipping begins, the entire carambola-shaped ball body 2 and most of the ball handle 1 are immersed in the latex, and the collar 4 is located above the latex without contacting the latex;

[0050] 3. After the dipping time is appropriate and the film on the handle 1 is of appropriate thickness, the mold is lifted until the handle 1 is completely exposed to the latex, and the lifting is stopped; the collar 4 is moved along the collar slide bar 6 to cover the handle 1, and circulating hot water is pre-circulated in the jacket of the collar 4 to heat the film on the handle 1 to increase the strength of the film and reduce demoulding damage;

[0051] 4. After the ball body 2 is impregnated to a suitable thickness, the mold is removed to complete the impregnation.

[0052] In the above step 3, the appropriate dipping time refers to the time required to achieve the appropriate wet film weight for the balloon, which has a certain fluctuation range due to the quality requirements of balloons of different specifications, different production seasons, different batches of rubber materials, different temperatures, etc. Generally speaking, for large-sized balloons that can reach a launch altitude of 40km, 45km, and 50km, the appropriate dipping time is generally within the range of 8-12 minutes.

[0053] In the above step 3, the appropriate thickness of the film on the handle 1 is generally 1.2-1.5 mm.

[0054] In the above step 4, dipping the ball body 2 to a suitable thickness generally refers to dipping it to 1.4-1.8 mm.

[0055] Producing sounding balloons by oblique immersion can further reduce the downward movement of the adhesive film and effectively reduce defects such as adhesion and adhesive strips during balloon production.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A near-space large-scale sounding balloon mold, comprising a wooden cylindrical mold handle (1) and a carambola-shaped mold body (2), wherein the center axes of the handle (1) and the body (2) are coaxial and integral structures, and characterized in that: The free end of the ball handle (1) is provided with a preheating ring (4) which can move and cover the ball handle (1) to heat it, and the outer periphery of the free end of the ball handle (1) is provided with a plurality of anti-slip grooves (3) along the axial direction; the center of the ball handle (1) and the central axis is hollowed out and inlaid with a densification inlay strip (5) made of a heavy density material, so that the overall density of the mold is close to 1g / cm 3 ; A cylindrical sleeve slide rod (6) is coaxially fixed to the middle of the free end of the ball handle (1), and a support column for supporting the sleeve (4) is respectively provided on the opposite sides of the end of the sleeve slide rod (6) away from the ball handle (1); an end cover with a circular central through hole is provided on the end of the sleeve (4) away from the ball handle (1), and the sleeve (4) is slidably penetrated on the sleeve slide rod (6) through the central through hole; the opposite sides of the central through hole are radially recessed to form a rotational sliding groove (43) that can pass through the support column, and a sleeve limiter (9) for clamping the support column is respectively provided on the opposite sides below the central through hole where the rotational sliding groove (43) is not provided, and the sleeve limiter (9) is in contact with the outer side of the sleeve slide rod (6) so that the distance between the inner wall of the sleeve (4) and the outer wall of the ball handle (1) is maintained at 3-5mm; The free end of the sleeve slide rod (6) is also fixedly connected to an inclined mold frame fixing screw rod (10), and the angle between the mold frame fixing screw rod (10) and the horizontal plane is 60°-75°.

2. The near-space large-scale sounding balloon mold according to claim 1 is characterized by: The sleeve (4) is a circular sleeve (4) with a jacket capable of passing hot water, comprising a circular outer cylinder (41) and a circular inner cylinder (42) sleeved inside the outer cylinder (41), the two ends between the inner cylinder (42) and the outer cylinder (41) being sealed into an integral structure to form the jacket, and the two ends on the opposite sides of the outer cylinder (41) are respectively provided with a water inlet (7) and a water outlet (8) which are in communication with the inner cavity of the jacket.

3. The near-space large-scale sounding balloon mold according to claim 1 or 2, characterized in that: The anti-slip grooves (3) on the ball handle (1) have a depth of 1-3 mm and a width of 1-5 mm; the number of the anti-slip grooves (3) is 3-5, and the interval between adjacent anti-slip grooves (3) is 5 mm-6 mm.

4. The near-space large-scale sounding balloon mold according to claim 1 or 2, characterized in that: The heavy density material is metal iron, aluminum or copper.

5. The near-space large-scale sounding balloon mold according to claim 1 or 2, characterized in that: The number of spherical petals (11) of the carambola-shaped mold ball body (2) is 8-11, and the aspect ratio is 1.45-1.

65.

6. A method for impregnating a near-space large-scale sounding balloon mold according to any one of claims 1 to 5, characterized in that: The dipping method is oblique dipping, and during the oblique dipping, the angle between the central axis of the large-scale sounding balloon mold in the near-space and the latex liquid surface is 60°-75°.

7. The impregnation method according to claim 6, characterized in that: When dipping begins, the entire ball body (2) of the mold and most of the ball handle (1) are immersed in latex, and the ring (4) is located above the latex and does not touch the latex; after dipping for a suitable time and until the ball handle (1) has a suitable thickness, the mold is lifted until the ball handle (1) is completely exposed to the latex, and the lifting is stopped; the ring (4) is moved along the ring slide bar (6) to cover the ball handle (1), and circulating hot water is pre-passed in the jacket of the ring (4) to heat the rubber film at the ball handle (1); after the ball body (2) is immersed to a suitable thickness, the mold is lifted out to complete the dipping.

8. The impregnation method according to claim 7, characterized in that: The angle between the mold and the latex liquid surface is formed by vertically installing the mold frame fixing screw (10) on the horizontally arranged mold frame (12), and the top of the mold frame fixing screw (10) passes through the installation through hole provided on the mold frame (12) and is fastened to the top of the mold frame (12) through the fixing nut (13).

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