A demolding device for a blower handle injection molding machine

Abstract

This invention relates to the field of demolding technology for injection molding equipment, specifically disclosing a demolding device for an injection molding machine with a blower handle. The device includes a base plate, with slide rods symmetrically fixedly connected to the upper surfaces of both sides of the base plate. The slide rods are arranged in pairs, and sliding plates are slidably connected to each slide rod. By setting up a transfer cavity, the device can help quickly fill the mold during injection molding, reducing injection cycle time and thus improving production efficiency. Simultaneously, the transfer cavity can better control the temperature of the raw material, ensuring that the material is injected in its optimal state, thereby improving product quality. Furthermore, by setting up a spiral plate, spiral conveying can be achieved, ensuring that the raw material is uniformly mixed before entering the mold. This helps reduce air bubbles and unevenness in the raw material, thus improving product quality. At the same time, spiral conveying can provide stable pressure, which is crucial for ensuring uniform filling of the raw material in the mold and helps reduce product defects.

Description

Technical Field

[0001] This invention relates to the field of demolding technology for injection molding equipment, specifically a demolding device for an injection molding machine with a blower handle. Background Technology

[0002] Injection molding is a widely used processing method for manufacturing various plastic products, and it plays an important role in the production of hair dryer handles. It involves injecting molten plastic raw material into a mold cavity, which then cools and solidifies to obtain a product with a specific shape and size. However, injection molding, especially for products like hair dryer handles, faces several technical challenges.

[0003] In existing technologies, it is difficult to effectively guarantee the filling speed and material uniformity of injection molds, which often leads to long injection molding cycles and low production efficiency. Simultaneously, poor material temperature control can easily cause quality problems in the product, such as bubbles and unevenness. Furthermore, during the demolding stage, separating the inner surface of the blower handle from the mold is difficult, easily causing scratches on the inner surface of the product, affecting its appearance and quality. Moreover, the demolding process has a low degree of automation and requires significant manual labor. These problems restrict the efficiency and product quality of blower handle injection molding production and urgently need to be addressed. Summary of the Invention

[0004] This invention provides a demolding device for a blower handle injection molding machine, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a demolding device for an injection molding machine of a hair dryer handle, comprising a base plate, wherein sliding rods are symmetrically fixedly connected to the upper surfaces of both sides of the base plate, wherein the sliding rods are arranged in pairs, and a sliding plate is slidably connected to the sliding rods; and further comprising:

[0006] The upper module is fixedly installed on the inner side of the slide plate, and the upper module is driven by a hydraulic system to slide up and down along the slide bar;

[0007] The lower module is fixedly installed on the upper surface of the middle part of the base plate and is positioned directly above the upper module. The lower module and the upper module work together in cooperation.

[0008] The upper module includes an upper mold base, the two side surfaces of which are fixedly connected to the inner side surface of the slide plate. A transfer cavity is provided inside the upper mold base. A feed hole is provided on the upper surface of the middle part of the upper mold base, wherein the feed hole is connected to the transfer cavity. A filling groove is provided on the lower surface of the middle part of the upper mold base, and the filling groove is configured as an annular shape.

[0009] Preferably, the lower mold assembly includes a lower mold base, which is fixedly connected to the upper surface of the middle part of the base plate. A mounting groove is formed through the upper surface of the middle part of the lower mold base. The mounting groove is cylindrical and has an injection pipe inside. The bottom of the injection pipe is fixedly connected to the upper surface of the base plate, wherein the injection pipe and the mounting groove are arranged on the same central axis.

[0010] Preferably, a leakage groove is provided through the bottom of the injection tube, and six leakage grooves are provided at fixed intervals around the central axis of the injection tube. An annular cavity is provided between the injection tube and the inner surface of the lower mold base, which is opposite to the injection groove. A spiral plate is fixedly connected to the outer surface of the injection tube, and the outer surface of the spiral plate is fixedly connected to the inner surface of the lower mold base.

[0011] Preferably, the inner side of the injection tube is provided with a mounting bracket, the bottom of the mounting bracket is fixedly connected to the upper surface of the middle part of the base plate, and the inner surface of the middle part of the mounting bracket is fixedly inlaid with a limiting ring, and four limiting rings are provided at fixed intervals along the inner surface of the mounting bracket.

[0012] Preferably, the upper and lower surfaces of the limiting ring are slidably connected to a first movable plate. The first movable plate is fixedly spaced at three intervals around the central axis of the limiting ring. A second movable plate is disposed between adjacent first movable plates. The second movable plate and the first movable plate are combined to form a ring, wherein the outer surfaces of the first movable plate and the second movable plate are combined to form a complete circular plane.

[0013] Preferably, the second movable plate has symmetrical linkage grooves on both sides, the two ends of the first movable plate are slidably connected in the linkage grooves, the second movable plate has deformation grooves on both sides, and the deformation grooves are symmetrically fixedly connected to the interior of the deformation grooves, the support plates being set as arc-shaped plates.

[0014] Preferably, an installation block is fixedly connected to the inner surface of the first movable plate, a sleeve is fixedly connected through the inside of the installation block, and insert rods are slidably inserted into both ends of the sleeve. The sleeve and insert rods are combined to form a ring. A traction rod is fixedly connected to the outer surface of the middle part of the insert rod, and the outer end of the traction rod is slidably inserted into the inner surface of the second movable plate. A limiting tube is provided on the inner side of the mounting frame. The bottom of the limiting tube is fixedly connected to the upper surface of the middle part of the base plate. A fixing post is provided inside the limiting tube. The bottom of the fixing post is fixedly connected to the upper surface of the base plate. A movable tube is slidably sleeved on the outer surface of the fixing post. A connecting block is fixedly connected to the outer surface of the movable tube. A cover plate is fixedly connected to the top of the movable tube. A pull rope is fixedly connected to the outer surface of the connecting block. The outer end of the pull rope is fixedly connected to the inner surface of the installation block. A spring is fixedly connected between the installation block and the limiting tube, and the pull rope slidably passes through the limiting tube.

[0015] Preferably, a connecting plate is fixedly connected to the inner surface of the adjacent first movable plates, a pneumatic tube is slidably connected to the outer surface of the connecting plate, a pneumatic bladder is fixedly connected to the inner surface of the connecting plate, the end of the pneumatic bladder away from the connecting plate is fixedly connected to the outer surface of the limiting tube, a polymerization groove is formed inside the limiting ring, a microhole is formed through the outer surface of the limiting ring and the microhole communicates with the polymerization groove, and the pneumatic tube is fixedly connected to the inner surface of the limiting ring and communicates with the polymerization groove.

[0016] Preferably, the bottom of the moving tube is provided with a sliding groove, and the bottom of the moving tube is slidably connected to the upper surface of the base plate through the sliding groove. A base block is fixedly connected to the bottom of the moving tube, and movable rods are fixedly connected to both sides of the base block through connecting rods. The upper and lower ends of the movable rods are slidably connected to the upper surfaces of the slide plate and the base plate, respectively. The middle part of the movable rod is elastically connected to both sides of the upper surface of the base plate through a spring. When the blower handle needs to be injection molded, the upper mold can be driven by hydraulic equipment to move down along the sliding rod and approach the lower mold, so that the upper mold base and the lower mold base are tightly fitted. Then, the raw material is injected into the transfer cavity through the feed hole. After the raw material enters the transfer cavity, it will enter the cavity between the injection tube and the lower mold base through the injection groove, and enter the inner cavity of the injection tube through the leakage groove at the bottom of the injection tube, thus completing the injection molding of the blower handle.

[0017] This invention provides a demolding device for an injection molding machine of a hair dryer handle. It has the following beneficial effects:

[0018] 1. This blower handle injection molding machine demolding device, through the setting of a transfer chamber, can help quickly fill the mold during injection, reduce injection cycle time, and thus improve production efficiency. At the same time, the transfer chamber can better control the temperature of the raw materials, ensuring that the raw materials are injected in the optimal state, thereby improving product quality. Furthermore, the spiral plate can achieve spiral conveying, which can ensure that the raw materials are uniformly mixed before entering the mold. This helps to reduce air bubbles and unevenness in the raw materials, thereby improving product quality. In addition, the spiral conveying can provide stable pressure, which is very important for ensuring that the raw materials are uniformly filled in the mold, helping to reduce product defects.

[0019] 2. The demolding device of this hair dryer handle injection molding machine uses a deformation groove to cause the two sides of the second moving plate to bend, and the bent second moving plate moves slightly inward. This allows the first and second moving plates to gradually separate from the inner surface of the hair dryer handle during demolding. This gradual separation maximizes the protection of the inner surface of the hair dryer handle during demolding, preventing scratches and reducing the difficulty of demolding. The sleeve and insert ensure that the first moving plates shrink and separate synchronously, greatly improving the working stability and coordination of the device. The connecting plate connects and fixes all the first moving plates, further improving working stability.

[0020] 3. The demolding device of this hair dryer handle injection molding machine, when the first moving plate retracts, drives the connecting plate to move on the air pressure pipe, which ultimately compresses the air pressure bladder, causing it to transport its internal air pressure to the polymerization tank through the air pressure pipe, and then to the outside through the micropores on the polymerization tank. This allows the inner surface of the hair dryer handle to gradually detach from the contact with the limiting ring. In conjunction with the first and second moving plates, the demolding of the inner surface of the hair dryer handle is automatically completed when the upper mold moves upward, solving the problem of difficult demolding of the inner surface of the hair dryer handle, while greatly improving the degree of automation and significantly reducing manpower. Attached Figure Description

[0021] Figure 1 This is the front view of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the module of the present invention;

[0023] Figure 3 This is a partial structural schematic diagram of the lower module of the present invention;

[0024] Figure 4 This is a schematic diagram of the installation structure of the limiting ring of the present invention;

[0025] Figure 5 This is a schematic diagram of the installation structure of the first and second movable plates of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the sleeve of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of the moving tube of the present invention;

[0028] Figure 8 This is a schematic diagram of the limiting ring of the present invention.

[0029] In the diagram: 1. Base plate; 2. Slide rod; 3. Slide plate; 4. Upper module; 41. Upper mold base; 42. Transfer cavity; 43. Feed hole; 44. Injection groove; 5. Lower module; 51. Lower mold base; 52. Mounting groove; 53. Injection pipe; 54. Leakage groove; 55. Spiral plate; 56. Mounting bracket; 57. Limiting ring; 58. First moving plate; 59. Second moving plate; 510. Linkage groove; 511. Deformation groove; 512. 513. Support plate; 514. Mounting block; 515. Sleeve; 516. Insert rod; 517. Traction rod; 518. Limiting tube; 519. Fixing column; 510. Moving tube; 511. Connecting block; 522. Cover plate; 523. Pull rope; 524. Connecting plate; 525. Air pressure pipe; 526. Air pressure bladder; 527. Aggregation tank; 528. Micropore; 529. Slide groove; 520. Bottom block; 521. Movable rod. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] First embodiment: as follows Figures 1 to 8 As shown, the present invention provides a technical solution: a demolding device for a blower handle injection molding machine, comprising a base plate 1, wherein slide rods 2 are symmetrically fixedly connected to the upper surfaces of both sides of the base plate 1, wherein the slide rods 2 are arranged in pairs, and a sliding plate 3 is slidably connected to the slide rods 2, and further comprising:

[0032] Upper module 4 is fixedly installed on the inner side of slide plate 3. Upper module 4 is driven by hydraulic system and slides up and down along slide rod 2.

[0033] The lower module 5 is fixedly installed on the upper surface of the middle part of the base plate 1. The lower module 5 is located directly above the upper module 4, and the lower module 5 and the upper module 4 work together.

[0034] The upper module 4 includes an upper mold base 41, the two side surfaces of the upper mold base 41 are fixedly connected to the inner side surface of the slide plate 3, the upper mold base 41 has a transfer cavity 42 inside, the upper surface of the middle part of the upper mold base 41 has a feed hole 43, the feed hole 43 is connected to the transfer cavity 42, and the lower surface of the middle part of the upper mold base 41 has an injection groove 44, which is annular.

[0035] Second embodiment: as follows Figures 1 to 8As shown, the lower mold assembly 5 includes a lower mold base 51, which is fixedly connected to the upper surface of the middle part of the base plate 1. A mounting groove 52 is provided through the upper surface of the middle part of the lower mold base 51. The mounting groove 52 is cylindrical and an injection tube 53 is provided inside the mounting groove 52. The bottom of the injection tube 53 is fixedly connected to the upper surface of the base plate 1. The injection tube 53 and the mounting groove 52 are arranged on the same central axis.

[0036] The bottom of the injection tube 53 is provided with a leakage groove 54. The leakage groove 54 is provided with six grooves at fixed intervals around the central axis of the injection tube 53. An annular cavity is provided between the injection tube 53 and the inner surface of the lower mold base 51, which is opposite to the injection groove 44. A spiral plate 55 is fixedly connected to the outer surface of the injection tube 53. The outer surface of the spiral plate 55 is fixedly connected to the inner surface of the lower mold base 51.

[0037] The inner side of the injection tube 53 is provided with a mounting bracket 56. The bottom of the mounting bracket 56 is fixedly connected to the upper surface of the middle part of the base plate 1. The inner surface of the middle part of the mounting bracket 56 is fixedly inlaid with a limiting ring 57. Four limiting rings 57 are fixedly arranged at fixed intervals along the inner surface of the mounting bracket 56.

[0038] The upper and lower surfaces of the limiting ring 57 are slidably connected to the first moving plate 58. The first moving plate 58 is fixedly spaced three times around the central axis of the limiting ring 57. A second moving plate 59 is arranged between adjacent first moving plates 58. The second moving plate 59 and the first moving plate 58 are combined to form a ring. The outer surfaces of the first moving plate 58 and the second moving plate 59 are combined to form the entire circular plane.

[0039] The second movable plate 59 has symmetrical linkage grooves 510 on both sides. The two ends of the first movable plate 58 are slidably connected in the linkage grooves 510. The second movable plate 59 has deformation grooves 511 on both sides. The deformation grooves 511 are symmetrically fixedly connected to the inside of the deformation grooves 512. The support plates 512 are set as arc plates.

[0040] A mounting block 513 is fixedly connected to the inner surface of the first movable plate 58. A sleeve 514 is fixedly connected through the inside of the mounting block 513. Insert rods 515 are slidably inserted into both ends of the sleeve 514. The sleeve 514 and the insert rods 515 are combined to form a ring. A traction rod 5151 is fixedly connected to the outer surface of the middle part of the insert rod 515. The outer end of the traction rod 5151 is slidably inserted into the inner surface of the second movable plate 59. A limiting tube 516 is provided on the inner side of the mounting bracket 56. The bottom of the limiting tube 516 is fixedly connected to the upper surface of the middle part of the base plate 1. An internal fixing post 517 is provided. The bottom of the fixing post 517 is fixedly connected to the upper surface of the base plate 1. A movable tube 518 is slidably sleeved on the outer surface of the fixing post 517. A connecting block 519 is fixedly connected to the outer surface of the movable tube 518. A cover plate 5191 is fixedly connected to the top of the movable tube 518. A pull rope 520 is fixedly connected to the outer surface of the connecting block 519. The outer end of the pull rope 520 is fixedly connected to the inner surface of the mounting block 513. A spring is fixedly connected between the mounting block 513 and the limiting tube 516. The pull rope 520 slides through the limiting tube 516.

[0041] A connecting plate 521 is fixedly connected to the inner surface of the adjacent first moving plates 58. A pneumatic tube 522 is slidably connected through the outer surface of the connecting plate 521. A pneumatic bladder 523 is fixedly connected to the inner surface of the connecting plate 521. One end of the pneumatic bladder 523 away from the connecting plate 521 is fixedly connected to the outer surface of the limiting tube 516. A polymerization groove 524 is opened inside the limiting ring 57. A microhole 525 is opened through the outer surface of the limiting ring 57. The microhole 525 communicates with the polymerization groove 524. The pneumatic tube 522 is fixedly connected through the inner surface of the limiting ring 57. The pneumatic tube 522 communicates with the polymerization groove 524.

[0042] The bottom of the movable tube 518 is provided with a sliding groove 526. The bottom of the movable tube 518 is slidably connected to the upper surface of the base plate 1 through the sliding groove 526. The bottom of the movable tube 518 is fixedly connected to a base block 527. The two sides of the base block 527 are fixedly connected to movable rods 528 through connecting rods. The upper and lower ends of the movable rods 528 are slidably connected to the upper surfaces of the slide plate 3 and the base plate 1, respectively. The middle part of the movable rods 528 is elastically connected to the two sides of the upper surface of the base plate 1 through a spring.

[0043] During operation, when the blower handle needs to be injection molded, the upper mold assembly 4 is driven by hydraulic equipment to move down along the slide bar 2 and approach the lower mold assembly 5, ultimately making the upper mold base 41 and the lower mold base 51 fit tightly together. Then, raw material is injected into the transfer cavity 42 through the feed hole 43. After the raw material enters the transfer cavity 42, it enters the cavity between the injection tube 53 and the lower mold base 51 through the injection groove 44, and then enters the inner cavity of the injection tube 53 through the leakage groove 54 at the bottom of the injection tube 53, thus completing the injection molding of the blower handle. By setting the transfer cavity 42, the mold can be filled quickly during injection molding, reducing the injection cycle time and thus improving production efficiency. At the same time, the transfer cavity 42 can better control the temperature of the raw material, ensuring that the raw material is in a safe and stable condition. Injection molding is performed under optimal conditions to improve product quality. The spiral conveyor, achieved through the spiral plate 55, ensures uniform mixing of the raw material before it enters the mold, reducing air bubbles and unevenness, thus improving product quality. The spiral conveyor also provides stable pressure, crucial for ensuring uniform filling of the mold and reducing product defects. After injection molding, the hydraulic equipment is driven to move upwards in the reverse direction, moving the upper mold assembly 4 upwards along the slide bar 2 via the slide plate 3. When the slide plate 3 reaches the top of the movable rod 528, it further moves the movable rod 528 upwards, which in turn moves the moving tube 518 upwards along the fixed column 517 via the bottom block 527 connected to its bottom. When the moving tube 51... When the 8 moves upward, it simultaneously drives the connecting block 519 upward, thereby pulling the pull rope 520. The pull rope 520, limited by the limiting tube 516, only pulls the mounting block 513 horizontally inward. This causes the first moving plate 58, fixedly connected to the mounting block 513, to move inward. As the first moving plate 58 continues to move, it drives the second moving plate 59 to move inward through the linkage groove 510. Since the angle between two adjacent first moving plates 58 is acute, the continuous movement of the first moving plate 58 will compress the sides of the second moving plate 59. This causes the sides of the second moving plate 59 to bend through the deformation groove 511, resulting in a slight inward movement of the bent second moving plate 59. This, in turn, causes the first moving plate 58 to move inward. During demolding, plate 58 and the second moving plate 59 gradually disengage from the inner surface of the blower handle. This gradual disengagement maximizes protection of the inner surface of the blower handle during demolding, preventing scratches and reducing demolding difficulty. The sleeve 514 and insert rod 515 ensure that the first moving plate 58 retracts synchronously, significantly improving the stability and coordination of the device. The connecting plate 521 connects and fixes all the first moving plates 58, further enhancing stability. When the first moving plate 58 retracts, it drives the connecting plate 521 to move on the air pressure pipe 522, ultimately compressing the air pressure bladder 523.The internal air pressure is delivered to the polymerization tank 524 through the air pressure pipe 522, and then outward through the micropores 525 on the polymerization tank 524. This causes the inner surface of the hair dryer handle to gradually detach from the contact ring 57. Combined with the first moving plate 58 and the second moving plate 59, this automatically demolds the inner surface of the hair dryer handle as the upper module 4 moves upward, solving the problem of difficult demolding of the inner surface of the hair dryer handle. Simultaneously, it significantly improves the automation level of the operation and greatly reduces manpower requirements.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A demolding device for a blower handle injection molding machine, comprising a base plate (1), characterized in that: The base plate (1) has sliding rods (2) symmetrically fixedly connected to the upper surfaces of both sides, wherein the sliding rods (2) are arranged in pairs, and a sliding plate (3) is slidably connected to the sliding rods (2). The base plate also includes: The upper module (4) is fixedly installed on the inner side of the slide plate (3), wherein the upper module (4) is driven by a hydraulic system and slides up and down along the slide bar (2); The lower module (5) is fixedly installed on the upper surface of the middle part of the base plate (1). The lower module (5) is located directly below the upper module (4). The lower module (5) and the upper module (4) cooperate with each other. The upper module (4) includes an upper mold base (41), the two side surfaces of the upper mold base (41) are fixedly connected to the inner side surface of the slide plate (3), the upper mold base (41) has a transfer cavity (42) inside, the upper surface of the middle part of the upper mold base (41) has a feed hole (43) connected to the transfer cavity (42), and the lower surface of the middle part of the upper mold base (41) has an injection groove (44) which is annular. The lower module (5) includes a lower mold base (51), which is fixedly connected to the upper surface of the middle part of the base plate (1). The upper surface of the middle part of the lower mold base (51) is provided with a mounting groove (52), which is cylindrical. An injection tube (53) is provided inside the mounting groove (52). The bottom of the injection tube (53) is fixedly connected to the upper surface of the base plate (1). The injection tube (53) and the mounting groove (52) are arranged on the same central axis. The bottom of the injection tube (53) is provided with a leakage groove (54). The leakage groove (54) is provided with six grooves at fixed intervals around the central axis of the injection tube (53). An annular cavity is provided between the injection tube (53) and the inner surface of the lower mold base (51), which is opposite to the injection groove (44). A spiral plate (55) is fixedly connected to the outer surface of the injection tube (53). The outer surface of the spiral plate (55) is fixedly connected to the inner surface of the lower mold base (51). The inner side of the injection tube (53) is provided with a mounting bracket (56). The bottom of the mounting bracket (56) is fixedly connected to the upper surface of the middle part of the base plate (1). The inner surface of the middle part of the mounting bracket (56) is fixedly inlaid with a limiting ring (57). Four limiting rings (57) are provided at fixed intervals along the inner surface of the mounting bracket (56). The upper and lower surfaces of the limiting ring (57) are slidably connected to the first moving plate (58). The first moving plate (58) is fixedly spaced three times around the central axis of the limiting ring (57). A second moving plate (59) is provided between adjacent first moving plates (58). The second moving plate (59) and the first moving plate (58) are combined to form a ring. The outer surfaces of the first moving plate (58) and the second moving plate (59) are combined to form the entire circular plane. The second movable plate (59) has symmetrical linkage grooves (510) on both sides. The two ends of the first movable plate (58) are slidably connected in the linkage grooves (510). The second movable plate (59) has deformation grooves (511) on both sides. The deformation grooves (511) are symmetrically fixedly connected to the inside of the deformation grooves (511). The support plates (512) are set as arc plates. An installation block (513) is fixedly connected to the inner surface of the first movable plate (58). A sleeve (514) is fixedly connected through the inside of the installation block (513). Insert rods (515) are slidably inserted into both ends of the sleeve (514). The sleeve (514) and the insert rods (515) are combined to form a ring. A traction rod (5151) is fixedly connected to the outer surface of the middle part of the insert rod (515). The outer end of the traction rod (5151) is slidably inserted into the inner surface of the second movable plate (59). A limiting tube (516) is provided on the inner side of the mounting bracket (56). The bottom of the limiting tube (516) is fixedly connected to the upper surface of the middle part of the base plate (1). The interior of the plate is provided with a fixed column (517), the bottom of which is fixedly connected to the upper surface of the base plate (1). The outer surface of the fixed column (517) is slidably sleeved with a moving tube (518). The outer surface of the moving tube (518) is fixedly connected with a connecting block (519). The top of the moving tube (518) is fixedly connected with a cover plate (5191). The outer surface of the connecting block (519) is fixedly connected with a pull rope (520). The outer end of the pull rope (520) is fixedly connected to the inner surface of the mounting block (513). A spring is fixedly connected between the mounting block (513) and the limiting tube (516). The pull rope (520) slides through the limiting tube (516). The bottom of the movable tube (518) is provided with a sliding groove (526). The bottom of the movable tube (518) is slidably connected to the upper surface of the base plate (1) through the sliding groove (526). The bottom of the movable tube (518) is fixedly connected to a base block (527). The two sides of the base block (527) are fixedly connected to movable rods (528) through connecting rods. The upper and lower ends of the movable rods (528) are slidably connected to the upper surfaces of the slide plate (3) and the base plate (1) respectively. The middle part of the movable rods (528) is elastically connected to the two sides of the upper surface of the base plate (1) through a spring.

2. The demolding device for a blower handle injection molding machine according to claim 1, characterized in that: A connecting plate (521) is fixedly connected to the inner surface of the first moving plate (58) that are adjacent to each other. A pneumatic tube (522) is slidably connected through the outer surface of the connecting plate (521). A pneumatic bladder (523) is fixedly connected to the inner surface of the connecting plate (521). One end of the pneumatic bladder (523) away from the connecting plate (521) is fixedly connected to the outer surface of the limiting tube (516). An polymerization groove (524) is opened inside the limiting ring (57). A microhole (525) is opened through the outer surface of the limiting ring (57). The microhole (525) communicates with the polymerization groove (524). The pneumatic tube (522) is fixedly connected through the inner surface of the limiting ring (57). The pneumatic tube (522) communicates with the polymerization groove (524).

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