A knitting bag size adjustable forming device

Abstract

The present invention provides a forming device with adjustable dimensions for woven bags, belonging to the technical field of woven bag processing. It includes a heating wire drawing machine and a cooling water tank arranged in front of one side of the heating wire drawing machine. It further includes a wire drawing conveying mechanism arranged on the cooling water tank and a processing unit arranged above the top of the cooling water tank. Through the coordinated cooperation of the positioning rollers, the double-threaded sections, and the positioning sleeves, the present invention aims to respectively limit each plastic wire body between two positioning sleeves on each double-threaded section, thereby preventing multiple plastic wire bodies from shifting or entangling with each other during the cooling process, ensuring the stability and consistency of the plastic wire bodies after cooling and forming. At the same time, compared with the fixed distance between the two positioning sleeves, this design can also adapt to plastic wire bodies of different sizes, avoiding the waiting preparation time caused by frequent replacement of the positioning sleeves and having higher production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of woven bag processing, and in particular to a forming device with adjustable woven bag size. Background Art

[0002] A woven bag, also known as a snake skin bag, is a common type of plastic bag and is widely used in the packaging field. Its raw materials are usually various chemical plastic raw materials such as polyethylene and polypropylene. Its production process includes: after mixing polypropylene resin pellets, feeding them into a plastic wire drawing machine for heating and drawing into wires, then winding up these wires, and finally going through the weaving and bag making processes to ultimately form a woven bag.

[0003] In the prior art, a patent with the authorization announcement number CN220052831U discloses a plastic wire forming device for woven bag processing. However, there is a problem in the operation of this device: multiple plastic wire bodies pulled out from one side of the heating wire drawing machine are wound between a first conveying roller, a second conveying roller, and a third conveying roller. Since the surfaces of these conveying rollers are all smooth, it is easy to cause the multiple plastic wire bodies wound on their surfaces to shift or entangle with each other. Such shifting and entanglement will not only affect the uniform contact between the plastic wire bodies and the cooling water, resulting in inconsistent cooling effects, but may also further cause uneven tension distribution during the winding of the plastic wire bodies. These problems will ultimately affect the stability and consistency of the plastic wire bodies after cooling and forming. Therefore, in view of this problem, the present invention proposes a forming device with adjustable woven bag size. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a forming device with adjustable woven bag size that can overcome or at least partially solve the above problems.

[0005] To solve the above technical problem, the basic concept of the technical solution adopted by the present invention is: a forming device with adjustable woven bag size, including a heating wire drawing machine and a cooling water tank arranged in front of one side of the heating wire drawing machine, and further including: a wire drawing conveying mechanism arranged on the cooling water tank, wherein the wire drawing conveying mechanism includes a pair of conveying rollers and a positioning roller, the conveying rollers are arranged on the top of the cooling water tank, the positioning roller is arranged inside the cooling water tank and between the two conveying rollers, a driving part one connected to the positioning roller is installed on the cooling water tank, a plurality of uniformly distributed bidirectional threaded segments are arranged on the positioning roller, and a pair of positioning sleeves are threadedly connected to each of the bidirectional threaded segments; and a processing unit arranged above the top of the cooling water tank.

[0006] Preferably, the processing unit includes a pair of symmetric blower boxes up and down. A gas guide frame is fixed on the blower box. A horizontal plate that can reciprocate horizontally is provided on the gas guide frame. A moving plate that fits against the inner wall of the gas guide frame is fixed on the horizontal plate. A heating plate is fixed to the bottom of the horizontal plate. The bottom of the blower box is communicated with evenly distributed air outlet holes. A vertical plate is fixedly connected to the corresponding side of the horizontal plate outside the blower box. An inclined scraper is provided on the vertical plate. Moving grooves are provided on the opposite sides of the two vertical plates, and adsorption parts are arranged in the moving grooves.

[0007] Preferably, when the moving plate moves along one side of the inner wall of the gas guide frame, the adsorption part is located inside the moving groove, and at the same time, air is blown to the adsorbed side of the adsorption part. When the moving plate moves along the other side of the inner wall of the gas guide frame, the adsorption part is located below the bottom of the vertical plate.

[0008] Preferably, a pair of extension blocks are fixed on the positioning sleeve, and a limiting guide rod fixed between the inner walls of the cooling water tank is sleeved on the extension blocks.

[0009] Preferably, a pair of L-shaped fixing plates are fixed between the two blower boxes, and the L-shaped fixing plates are fixed on the cooling water tank.

[0010] Preferably, a second driving part is installed on the blower box. A connecting shaft rotatably arranged on the blower box is connected to the second driving part. A plurality of semi-circular gears are fixed on the connecting shaft. A gear plate that cooperates with the semi-circular gears is fixed on the top of the horizontal plate. A plurality of first springs are fixed between the heating plate and the side wall of the blower box.

[0011] Preferably, the adsorption part includes a plurality of second springs fixed on the top wall of the moving groove. The bottom end of the second spring is fixed with an extending plate that fits against the inner wall of the moving groove. An adsorption sponge is fixed to the bottom of the extending plate.

[0012] Preferably, a first gas guide hose is communicated with the bottom of the gas guide frame, and the other end of the first gas guide hose is communicated with the side wall of the moving groove near the bottom.

[0013] Preferably, the corresponding end of the first gas guide hose located inside the moving groove is arranged to incline upward.

[0014] Preferably, a second gas guide hose is communicated with the top of the gas guide frame, and the other end of the second gas guide hose is communicated with the top wall of the moving groove.

[0015] After adopting the above technical solutions, the present invention has the following beneficial effects compared with the prior art:

[0016] 1. Through the coordinated cooperation of the positioning rollers, the double-threaded sections, and the positioning sleeves, the present invention aims to respectively confine each plastic filament body between two positioning sleeves on each double-threaded section, thereby preventing multiple plastic filament bodies from shifting or entangling with each other during the cooling process, ensuring the stability and consistency of the plastic filament bodies after cooling and forming. At the same time, compared with the fixed spacing between two positioning sleeves, this design can also accommodate plastic filament bodies of different sizes, avoiding the waiting preparation time caused by frequent replacement of positioning sleeves, and achieving higher production efficiency.

[0017] 2. Through the coordinated cooperation of the cross plate, the inclined scraper, and the adsorption sponge, the present invention aims to greatly shorten the time required for the blowing box to finally air-dry the plastic filament bodies. More importantly, it also ensures that the dryness of the surface of the plastic filament bodies reaches a more uniform state. This uniform dryness is crucial for the subsequent plastic bag forming process. Because during the plastic bag forming process, if there is uneven moisture or residual moisture on the surface of the plastic filament bodies, it may cause problems such as defects, uneven thickness, or reduced strength in the formed plastic bags. By means of this pretreatment step, these potential problems can be effectively avoided, ensuring the forming quality of the plastic bags. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic left-side structural view of an adjustable-size forming device for woven bags provided by the present invention;

[0019] Figure 2 is a schematic top-view structural view of an adjustable-size forming device for woven bags provided by the present invention;

[0020] Figure 3 is a schematic exploded structural view of the connection between the positioning sleeve and the double-threaded section of an adjustable-size forming device for woven bags provided by the present invention;

[0021] Figure 4 is a schematic structural view of the processing unit of an adjustable-size forming device for woven bags provided by the present invention;

[0022] Figure 5 is a schematic cross-sectional view of the blowing box of an adjustable-size forming device for woven bags provided by the present invention Figure 1 ;

[0023] Figure 6 is the present invention Figure 5 is a schematic enlarged partial structural view at A in the present invention;

[0024] Figure 7 is a schematic cross-sectional view of the blowing box of an adjustable-size forming device for woven bags provided by the present invention Figure 2 ;

[0025] Figure 8For the present invention Figure 7 The partial enlarged structural schematic diagram at position B in the present invention.

[0026] In the figure: 1. Heating wire drawing machine; 2. Cooling water tank; 3. Wire drawing conveying mechanism; 31. Conveying roller; 32. Positioning roller; 33. Driving part one; 34. Double-threaded section; 35. Positioning sleeve; 36. Extension block; 37. Limit guide rod; 4. Processing unit; 41. Blowing box; 42. Air guiding frame; 43. Horizontal plate; 44. Moving plate; 45. Heating plate; 46. Air outlet hole; 47. Vertical plate; 48. Inclined scraper; 49. Moving groove; 410. L-shaped fixing plate; 411. Driving part two; 412. Connecting shaft; 413. Semi-circular gear; 414. Gear plate; 415. Spring one; 416. Air guiding hose one; 417. Air guiding hose two; 5. Adsorption part; 51. Spring two; 52. Extending plate; 53. Adsorption sponge. Specific embodiments

[0027] The following further describes the present invention in detail with reference to the drawings and embodiments, so that those skilled in the art can implement it according to the description in the specification.

[0028] It should be understood that the terms such as "having", "comprising", and "including" used herein do not exclude the presence or addition of one or more other elements or their combinations.

[0029] In the description of the present invention, the orientation or positional relationship indicated by the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0030] Example 1: Refer to Figures 1-3, An adjustable-sized forming device for woven bags, including a heating wire drawing machine 1 and a cooling water tank 2 arranged in front of one side of the heating wire drawing machine 1. It also includes a wire drawing conveying mechanism 3 arranged on the cooling water tank 2. The wire drawing conveying mechanism 3 includes a pair of conveying rollers 31 and a positioning roller 32. The conveying rollers 31 are arranged on the top of the cooling water tank 2, and the positioning roller 32 is arranged inside the cooling water tank 2 and located between the two conveying rollers 31. When the device is in use, the plastic wire body drawn from the right side of the heating wire drawing machine 1 is wound around the wire drawing conveying mechanism 3. When winding, the plastic wire body first bypasses the upper surface of the left conveying roller 31 near the top of the cooling water tank 2, then passes under the lower surface of the positioning roller 32, and then passes through the upper surface of the right conveying roller 31 near the top of the cooling water tank 2, and is connected to an external winding mechanism. Through such conveying and winding, the plastic wire body can contact the cooling water in the cooling water tank 2, playing a role in quickly cooling and reducing the temperature. After cooling and temperature reduction, the plastic wire body can be plasticized and its toughness will become stronger, which helps to improve the overall quality of the woven bag forming.

[0031] Embodiment 2: Refer to Figure 3 , On the basis of the above embodiment, in the above technical solution, the surface of the positioning roller 32 is smooth. When multiple plastic wire bodies are wound between the two conveying rollers 31 and the positioning roller 32 at the same time, they may shift. Once they shift, it will not only affect the cooling effect and winding quality of the plastic wire body, but also may cause inaccurate dimensions or uneven appearance after the woven bag is formed. Therefore, based on this problem, further, a driving part 33 connected to the positioning roller 32 is installed on the cooling water tank 2. The positioning roller 32 is provided with a plurality of uniformly distributed bidirectional thread segments 34. A pair of positioning sleeves 35 are threadedly connected to each bidirectional thread segment 34. A pair of extension blocks 36 are fixed on the positioning sleeves 35. A limiting guide rod 37 fixed between the inner walls of the cooling water tank 2 is sleeved on the extension blocks 36.

[0032] In the above technical solution, the driving part 33 using a servo motor drives the positioning roller 32 to rotate on the cooling water tank 2, in order to realize that the positioning sleeves 35 threadedly connected to each bidirectional thread segment 34 on the positioning roller 32 can move towards each other or in the opposite direction, so that the corresponding positioning distance between the two positioning sleeves 35 on each bidirectional thread segment 34 can be flexibly adjustable. The advantage of this design is that each plastic wire body can be respectively restricted between the two positioning sleeves 35 on each bidirectional thread segment 34, thereby preventing multiple plastic wire bodies from shifting or entangling with each other during the cooling process, ensuring the stability and consistency of the plastic wire body after cooling and forming. At the same time, compared with the fixed distance between the two positioning sleeves 35, this design can also adapt to plastic wire bodies of different sizes, avoiding the waiting preparation time caused by frequent replacement of the positioning sleeves 35, and having higher production efficiency.

[0033] Embodiment 3: On the basis of the above embodiment, considering that although multiple plastic filament bodies can be evenly located in the cooling water tank 2 for cooling and forming under the winding between the two conveying rollers 31 and the positioning roller 32, water stains will be carried on the surface of the plastic filament bodies after being cooled by the cooling water tank 2. If not processed in time, dust is likely to adhere, affecting the quality and appearance of the woven bag during forming, and further affecting the overall quality of the woven bag. Based on this, optimally, referring to Figures 4-8 , it further includes a processing unit 4 located above the right side near the top of the cooling water tank 2. Among them, the processing unit 4 includes a pair of symmetrically arranged air blowing boxes 41 up and down. A pair of L-shaped fixing plates 410 are fixed on the right side of the two air blowing boxes 41, and the L-shaped fixing plates 410 are fixed on the cooling water tank 2. By limiting the two air blowing boxes 41 through the L-shaped fixing plates 410, the stability of the air blowing boxes 41 during use can be ensured. An air guiding frame 42 is fixed on the air blowing box 41. A horizontal plate 43 that can reciprocate horizontally is provided on the air guiding frame 42. A moving plate 44 that fits the inner wall of the air guiding frame 42 is fixed on the horizontal plate 43. A heating plate 45 is fixed on the left side of the bottom of the horizontal plate 43. The bottom of the air blowing box 41 is communicated with uniformly distributed air outlet holes 46.

[0034] In the above technical solution, the air blowing boxes 41 are symmetrically arranged up and down between multiple plastic filament bodies so that the hot air in the two air blowing boxes 41 can blow from above and below the plastic filament bodies at the same time. Compared with the traditional method of only blowing on the upper surface or the lower surface of the plastic filament body, this design can cover the entire surface of the plastic filament body in all directions and evenly. Whether it is the top or the bottom, it can be fully affected by the hot air, which greatly increases the contact area and contact efficiency between the hot air and the surface of the plastic filament body, thereby accelerating the evaporation and removal process of water stains, avoiding the problem of uneven hot air distribution that may be caused by the single blowing method. At the same time, the horizontal plate 43 is designed to reciprocate, so that the heating plate 45 can continuously change its position as the horizontal plate 43 moves, thereby realizing the uniform distribution and dynamic adjustment of hot air in the air blowing box 41. This dynamic hot air distribution method further improves the water removal efficiency and ensures that all parts of the surface of the plastic filament body can be fully treated with hot air. Compared with the heating plate 45 with a fixed design in the air blowing box 41, which may cause the hot air to be too concentrated in some areas and insufficiently distributed in other areas, the reciprocating movement of the horizontal plate 43 can ensure the uniform distribution of hot air in the entire air blowing box 41, avoiding the occurrence of "dead corners" of hot air, thereby improving the water removal efficiency.

[0035] Among them, in order to realize the horizontal reciprocating movement of the above-mentioned horizontal plate 43 on the air guiding frame 42, referring to Figures 3-5 and Figure 7, a second driving part 411 is installed on the air blower box 41. A connecting shaft 412 rotatably arranged on the air blower box 41 is connected to the second driving part 411. A plurality of semi-circular gears 413 are fixed on the connecting shaft 412. A gear plate 414 matched with the semi-circular gears 413 is fixed on the top of the horizontal plate 43. A plurality of first springs 415 are fixed between the right side of the heating plate 45 and the side wall of the air blower box 41. During use, the second driving part 411 using a servo motor is started to drive the connecting shaft 412 to rotate, so that the plurality of semi-circular gears 413 connected to the connecting shaft 412 rotate along the tooth grooves of the corresponding gear plate 414, for pushing the horizontal plate 43 to move leftward. When the toothless part of the surface of the semi-circular gear 413 rotates to the position of the gear plate 414, the tooth grooves on the gear plate 414 are unrestricted and will return to the initial position under the reset of the first spring 415. Through such a design, the horizontal plate 43 can realize reciprocating movement in the horizontal direction under the combined action of the second driving part 411 and the first spring 415, ensuring that the heating plate 45 evenly distributes hot air in the air blower box 41, thereby improving the water removal efficiency and the treatment effect on the surface of the plastic filament body.

[0036] Embodiment 4: On the basis of the above embodiment, by means of the reciprocating movement of the horizontal plate 43, the water stains on the surface of the plastic filament body can be horizontally scraped before air drying, further reducing the difficulty and time of air drying the surface of the plastic filament body. Refer to Figures 4-8 , a vertical plate 47 is fixed near the left side of the horizontal plate 43. An inclined scraper 48 is provided on the vertical plate 47. Through the design of the inclined scraper 48, during use, the inclined scraper 48 is located on the left side of the horizontal plate 43 through the vertical plate 47. When the horizontal plate 43 moves leftward, the inclined scraper 48 on the horizontal plate 43 will also horizontally scrape along the left side direction of the surface of the plastic filament body. Then, after the water stains on the surface of the plastic filament body are scraped and reduced, when passing between the two air blower boxes 41, since the moisture on the surface of the plastic filament body has been greatly reduced at this time, the hot air blown out oppositely by the two air blower boxes 41 can more easily penetrate and act on the plastic filament body, enabling the remaining moisture to evaporate faster, accelerating the air drying speed of the surface of the plastic filament body, thereby shortening the overall air drying time.

[0037] Embodiment 5: On the basis of the above embodiment, refer to Figures 4-8, a moving groove 49 is provided at the bottom of the vertical plate 47, and an adsorption part 5 is provided in the moving groove 49. When the moving plate 44 moves leftward along the inner wall of the air guide frame 42, the adsorption part 5 is located inside the moving groove 49, and at the same time, air is blown to the adsorbed side of the adsorption part 5. When the moving plate 44 moves rightward along the inner wall of the air guide frame 42, the adsorption part 5 is located below the bottom of the vertical plate 47. Among them, the adsorption part 5 includes a plurality of second springs 51 fixed on the top wall of the moving groove 49. The bottom end of the second spring 51 is fixed with an extension plate 52 that fits against the inner wall of the moving groove 49. The bottom of the extension plate 52 is fixed with an adsorption sponge 53. The left side of the bottom of the air guide frame 42 is communicated with a first air guide hose 416, and the other end of the first air guide hose 416 is communicated with the side wall of the moving groove 49 near the bottom. The end of the first air guide hose 416 located inside the moving groove 49 is arranged obliquely upward. The right side of the top of the air guide frame 42 is communicated with a second air guide hose 417, and the other end of the second air guide hose 417 is communicated with the top wall of the moving groove 49.

[0038] Adopting such a technical solution, it is possible to control the extension or retraction of the adsorption sponge 53 in the moving groove 49 by using the stroke of the horizontal plate 43 reciprocating horizontally along the air guide frame 42. In the initial state, the adsorption sponge 53 is located inside the moving groove 49. When the horizontal plate 43 drives the inclined scraping plate 48 to move leftward along the water stains on the surface of the plastic filaments, the adsorption sponge 53 does not adsorb the water stains on the surface of the plastic filaments. This design ensures that the inclined scraping plate 48 can first scrape off most of the water. Only when the horizontal plate 43 moves rightward, the moving plate 44 connected to the horizontal plate 43 will squeeze the gas in the air guide frame 42 near the inner right chamber and compress it into the second air guide hose 417, which is used to transport and enter the moving groove 49 to drive the extension plate 52 to slide downward along the inner wall of the moving groove 49, so that the adsorption sponge 53 extends out of the port of the moving groove 49 and closely adheres to the surface of the plastic filament body to adsorb the remaining water stains. Such an operation sequence effectively avoids the adsorption sponge 53 directly adhering to the surface of the plastic filament body before the inclined scraping plate 48 scrapes the water stains, thereby reducing the water retention on the surface of the plastic filament body and also shortening the subsequent air-drying time of the adsorption sponge 53, improving the overall efficiency.

[0039] When the horizontal plate 43 moves to the left again, the moving plate 44 will squeeze the gas in the left chamber near the inside of the air guide frame 42 and compress it into the air guide hose 1 416. At the same time, the air guide hose 2 417 will suck the gas in the moving groove 49 into the right chamber inside the air guide frame 42. In this way, the extending plate 52 will be reset by the elastic force of the spring 2 51 without the support of air pressure, driving the adsorption sponge 53 to extend into the moving groove 49. The gas discharged from the air guide hose 1 416 at this time will blow air on the adsorption sponge 53 to help the adsorption sponge 53 dry faster. Through such a reciprocating cycle, the adsorption sponge 53 can continuously extend out for adsorption and reset for blowing, which is more efficient than the adsorption sponge 53 that is continuously attached to the surface of the plastic wire body and dried by blowing.

[0040] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which are equivalent modifications and improvements made to the above embodiments based on the essential technology of the present invention, and all of them belong to the protection scope of the present invention.

Claims

1. An adjustable-size forming device for woven bags, comprising: A heating wire drawing machine (1) and a cooling water tank (2) arranged in front of one side of the heating wire drawing machine (1), characterized in that it further comprises: A wire drawing conveying mechanism (3) arranged on the cooling water tank (2); Wherein, the wire drawing conveying mechanism (3) includes a pair of conveying rollers (31) and a positioning roller (32). The conveying rollers (31) are arranged on the top of the cooling water tank (2), and the positioning roller (32) is arranged inside the cooling water tank (2) and between the two conveying rollers (31). A first driving part (33) connected to the positioning roller (32) is installed on the cooling water tank (2). A plurality of uniformly distributed bidirectional thread segments (34) are provided on the positioning roller (32), and a pair of positioning sleeves (35) are threadedly connected to each bidirectional thread segment (34); and A processing unit (4) arranged above the top of the cooling water tank (2). The processing unit (4) includes a pair of symmetrically arranged blowing boxes (41) up and down. An air guiding frame (42) is fixed on the blowing box (41). A horizontal plate (43) that can move horizontally back and forth is provided on the air guiding frame (42). A moving plate (44) that fits against the inner wall of the air guiding frame (42) is fixed on the horizontal plate (43). A heating plate (45) is fixed to the bottom of the horizontal plate (43). The bottom of the blowing box (41) is communicated with uniformly distributed air outlet holes (46). A vertical plate (47) is fixedly connected to the corresponding side of the horizontal plate (43) outside the blowing box (41). An inclined scraping plate (48) is provided on the vertical plate (47). Moving grooves (49) are provided on one side of the two vertical plates (47) facing each other. An adsorption part (5) is arranged in the moving groove (49). When the moving plate (44) moves along one side of the inner wall of the air guiding frame (42), the adsorption part (5) is located inside the moving groove (49), and at the same time, the side of the adsorption part (5) that is adsorbed is blown. When the moving plate (44) moves along the other side of the inner wall of the air guiding frame (42), the adsorption part (5) is located below the bottom of the vertical plate (47); The adsorption part (5) includes a plurality of second springs (51) fixed to the top wall of the moving groove (49). The bottom end of the second spring (51) is fixed with an extending plate (52) that fits against the inner wall of the moving groove (49). An adsorption sponge (53) is fixed to the bottom of the extending plate (52). The bottom of the air guiding frame (42) is communicated with a first air guiding hose (416), and the other end of the first air guiding hose (416) is communicated with the side wall of the moving groove (49) near the bottom. The top of the air guiding frame (42) is communicated with a second air guiding hose (417), and the other end of the second air guiding hose (417) is communicated with the top wall of the moving groove (49).

2. The size-adjustable forming device for a woven bag according to claim 1, characterized in that, A pair of extension blocks (36) are fixed on the positioning sleeve (35), and a limiting guide rod (37) fixed between the inner walls of the cooling water tank (2) is sleeved on the extension block (36).

3. The adjustable woven bag size forming device according to claim 1, characterized in that, A pair of L-shaped fixing plates (410) are fixed between the two blowing boxes (41), and the L-shaped fixing plates (410) are fixed on the cooling water tank (2).

4. The size-adjustable forming device for a woven bag according to claim 1, wherein, A second driving part (411) is installed on the blowing box (41). A connecting shaft (412) rotatably arranged on the blowing box (41) is connected to the second driving part (411). A plurality of semi-circular gears (413) are fixed on the connecting shaft (412). A gear plate (414) matching with the semi-circular gears (413) is fixed on the top of the cross plate (43). A plurality of first springs (415) are fixed between the heating plate (45) and the side wall of the blowing box (41).

5. The adjustable knitting bag size forming device according to claim 1, characterized in that One end of the first air guide hose (416) corresponding to the inside of the moving groove (49) is arranged to incline upwards.

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