An injection molding mold for manufacturing a hair dryer housing

Abstract

The application relates to the technical field of injection molding molds, and particularly discloses an injection molding mold for manufacturing a hair dryer shell, which comprises a base, the upper surface of the base is symmetrically fixedly connected with sliding rods. When raw materials enter the cover plate, the raw materials first exist on the extrusion plate. With the increasing input of the raw materials, the extrusion force borne by the extrusion plate increases, that is, the extrusion plate starts to move downwards along the feeding pipe, finally makes the intermittent holes on the feeding pipe communicate with the top cavity of the cover plate, thereby inputting the raw materials into the lower mold module through the intermittent holes, and when the input is completed, the extrusion plate loses the extrusion force and is reset under the action of the elastic force, thereby moving upwards, that is, making the bottom cavity of the extrusion plate in a negative pressure state, thereby generating a reverse suction force on the feeding pipe, that is, automatically cleaning the feeding pipe after the injection molding is completed, avoiding the problem that the feeding pipe is blocked by a large amount of raw materials accumulated in the continuous injection molding process, and also ensuring the cleaning of the lower mold module, and greatly improving the use convenience.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, specifically to an injection mold for manufacturing a hair dryer housing. Background Technology

[0002] Injection molding dies are of paramount importance in the manufacture of hair dryer casings, forming the basis of its core molding process. The mold cavity shapes the raw material, which then solidifies into the predetermined casing shape through heating, pressurization, and cooling processes. This process has a profound impact on product quality, production efficiency, and cost control. Precise mold design ensures dimensional accuracy, appearance quality, and stable performance of the casing; efficient production capacity meets market demands; and reasonable cost planning enhances enterprise benefits and competitiveness, making them key elements for the development of the hair dryer industry.

[0003] Traditional injection molding for blower housings presents numerous challenges. The mold cavity is typically composed of upper and lower molds, easily leading to parting lines. Subsequent grinding and polishing processes increase costs, reduce efficiency, and damage surface quality and precision, affecting appearance and performance. The material delivery system lacks a self-cleaning mechanism, resulting in material residue clogging pipes, uneven flow, molding defects, reduced yield, increased maintenance frequency and costs, and production interruptions. Demolding often relies on mechanical force, which can damage the housing; complex shapes are difficult to demold, limiting design freedom, reducing production efficiency and mold life, hindering industrial upgrading, and urgently requiring innovative breakthroughs. Summary of the Invention

[0004] This invention provides an injection molding mold for manufacturing a hair dryer housing, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an injection molding mold for manufacturing a hair dryer housing, comprising a base, two bases symmetrically arranged, wherein the base supports the mold, and sliding rods are symmetrically fixedly connected to the upper surface of the base, wherein the sliding rods are arranged in pairs as a group, and further comprising:

[0006] The lower module is fixedly connected to the upper surface of the base and is set to a fixed state.

[0007] The upper module is slidably connected to the outer surface of the slide rod of the base on both sides, wherein the upper module and the lower module are aligned and engaged with each other;

[0008] The lower module includes a base plate, the lower surfaces of both sides of which are fixedly connected to the upper surface of the base. The upper surface of the base plate is symmetrically provided with sliding grooves. A sliding ring is slidably connected in the sliding grooves. An inner cylinder is fixedly connected to the inner surface of the sliding ring. A stabilizing tube is fixedly connected to the upper edge of the sliding ring. The top of the stabilizing tube and the top of the inner cylinder are set to the same horizontal plane. Initially, the top of the stabilizing tube is set to the same horizontal plane as the upper surface of the base plate.

[0009] Preferably, a pull rod is slidably connected to the outer surfaces of both sides of the stabilizing tube, the top of the pull rod is fixedly connected to the bottom surfaces of both sides of the upper module, and a connecting rod is fixedly connected to the bottom of the pull rod. The connecting rod is disposed in the gap below the bottom plate, and a drive tube is fixedly connected to the end of the connecting rod away from the pull rod.

[0010] Preferably, a sealing ring is fixedly connected to the top of the drive tube, a guide rod is slidably connected through the lower middle surface of the sealing ring, the top of the guide rod is fixedly connected to the top inner surface of the inner cylinder, and the outer surface of the sealing ring is slidably connected to the inner surface of the inner cylinder.

[0011] Preferably, a connecting tube is slidably connected to the bottom outer surface of the guide rod, the bottom of the connecting tube is fixedly connected to the middle upper surface of the sealing ring, and a collar is fixedly connected to the top of the connecting tube, the collar being slidably sleeved on the outer surface of the guide rod.

[0012] Preferably, the outer side of the collar is provided with an installation tube, and the end of the installation tube away from the collar is fixedly connected to the outer surface of the inner cylinder. The inner cylinder is provided with a working tube, the outer end of the working tube is set to be closed, and a connecting block is fixedly connected to the outer surface of the end of the working tube near the collar. The outer end of the connecting block is fixedly connected to the inner surface of the installation tube near the collar.

[0013] Preferably, the outer end of the working tube is provided with a through groove, and a mating ring is slidably connected to the outer surface of the end of the working tube away from the collar. The mating ring initially blocks the through groove. A pull rope is fixedly connected to the inner surface of the mating ring. The end of the pull rope away from the mating ring is fixedly connected to the outer surface of the collar. A corrugated plate is fixedly connected to the side surface of the mating ring near the collar. The corrugated plate is configured as an elastic plate.

[0014] Preferably, a first plug plate is slidably connected to the upper surface of the sliding ring, and three first plug plates are fixedly spaced around the central axis of the sliding ring. Second plug plates are slidably plugged into the two side surfaces of the first plug plate, wherein the first plug plates are combined into a cylindrical shape under the limiting action of the second plug plates.

[0015] Preferably, the interior of the stabilizing tube is hollow, and a pull plate is slidably connected inside the stabilizing tube. The pull plates are arranged symmetrically in pairs, and there are three sets of pull plates. The cavity between each set of pull plates is connected to the internal cavity of the inner cylinder. A pull tab is fixedly connected to the inner surface of the pull plate, and the end of the pull tab away from the pull plate passes through the stabilizing tube and is fixedly connected to the outer surface of the first plug-in plate.

[0016] Preferably, the upper module includes a cover plate, with sliding plates symmetrically fixedly connected to both ends of the cover plate. A sliding rod is slidably connected to the sliding rod. The interior of the cover plate is hollow. An injection hole is opened through the upper surface of the middle part of the cover plate. A conveying pipe is fixedly connected through the bottom surface of the inner part of the cover plate. The top of the conveying pipe is fixedly connected to the upper surface of the inner part of the cover plate. The bottom of the conveying pipe is directly opposite the cavity between the inner cylinder and the first insert plate. An intermittent hole is opened at the bottom of the conveying pipe. An extrusion plate is elastically slidably connected to the outer surface of the conveying pipe. The extrusion plate is initially positioned above the intermittent hole. If it is necessary to injection mold the nozzle shell of the blower, the cover plate can be pushed down by a hydraulic device until the cover plate and the bottom plate come into contact and are squeezed together. At this time, the raw material is input into the cover plate through the injection hole on the cover plate. After the raw material enters the cover plate, it enters the cavity between the inner cylinder of the lower module and the circular tube formed by the first insert plate through the intermittent hole on the conveying pipe, thus completing the injection molding process.

[0017] This invention provides an injection molding mold for manufacturing a hair dryer housing. It has the following beneficial effects:

[0018] 1. In the injection molding mold for the hair dryer housing, the raw material enters the cover plate and initially resides on the extrusion plate. As more and more material is input, the extrusion pressure on the extrusion plate increases, causing it to move downwards along the feed tube. Eventually, the intermittent holes on the feed tube connect with the top cavity of the cover plate, allowing the raw material to be fed into the lower module through the intermittent holes. Once the feeding is complete, the extrusion plate, having lost its extrusion pressure, resets under the action of elasticity and moves upwards, creating a negative pressure state at the bottom cavity of the extrusion plate. This generates a reverse suction force on the feed tube, automatically cleaning the feed tube after injection molding. This prevents the feed tube from accumulating large amounts of raw material and causing blockages during continuous injection molding, while also ensuring the cleanliness of the lower module, greatly improving ease of use.

[0019] 2. The injection molding mold for the blower housing is entirely housed within the lower mold assembly, ensuring seamless molding of the nozzle housing. This avoids the problem of parting lines requiring subsequent processing after injection molding, which is often caused by existing injection molding equipment where the mold cavity consists of both an upper and lower mold assembly. Furthermore, after injection molding, the hydraulic system can be driven to reverse and move the cover plate upwards. This upward movement of the cover plate pulls the drive pipe upwards via a pull rod. Initially, the drive pipe compresses the sealing ring, causing the sealing plate to move along the guide rod into the inner cylinder. This increases the internal air pressure of the inner cylinder, simultaneously sealing the nozzle. When the plate moves upward, it simultaneously drives the collar upward, which in turn stretches and pulls the mating ring inward along the working tube. This allows the internal air pressure of the inner cylinder to be input into the inner side of the injection-molded nozzle shell through the connecting groove on the working tube, thereby achieving the effect of automatic demolding of the nozzle shell with pneumatic assistance. This greatly improves the efficiency of the process. At the same time, the whole process is fully automated, which greatly reduces the usage standards of this mold. After the nozzle shell is removed, the cover plate moves down to reset, causing the mating ring to reset and re-block the inner cylinder, facilitating the next injection molding. This enables fast and continuous injection molding production and greatly increases the injection molding output.

[0020] 3. In the injection molding mold for manufacturing the blower housing, when the internal air pressure of the inner cylinder increases, it will also transport the internal air pressure to the inner side of the pull plate in the stabilizing tube, thereby causing the pull plates in the same group to slide in opposite directions. Then, the pull plate will pull the first plug plate outward. Due to the limiting effect of the second plug plate, the three first plug plates move outward synchronously, thereby causing the inner surface of the plug plate to automatically detach from the outer surface of the nozzle housing. Thus, when the inner side of the nozzle housing is pneumatically demolded, the outer first plug plate will also automatically move to complete the demolding of the outer surface of the nozzle housing, thereby greatly improving the production efficiency of the nozzle housing. 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 schematic diagram of the structure of the lower module of the present invention;

[0024] Figure 4 This is a schematic diagram of the material conveying pipe of the present invention;

[0025] Figure 5 This is a schematic diagram of the inner cylinder of the present invention;

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

[0027] Figure 7 This is a schematic diagram of the internal structure of the inner cylinder of the present invention;

[0028] Figure 8 This is a schematic diagram of the working tube of the present invention.

[0029] In the diagram: 1. Base; 2. Slide rod; 3. Lower module; 31. Base plate; 32. Slide groove; 33. Sliding ring; 34. Inner cylinder; 35. Stabilizing tube; 36. Pull rod; 37. Connecting rod; 38. Drive tube; 39. Sealing ring; 310. Guide rod; 311. Connecting tube; 312. Collar; 313. Mounting tube; 314. Working tube; 315. Connecting block; 316. Connecting groove; 317. Mating ring; 318. Pull rope; 319. Corrugated plate; 320. First insertion plate; 321. Second insertion plate; 322. Pull plate; 323. Pull piece; 4. Upper module; 41. Cover plate; 42. Slide plate; 43. Injection hole; 44. Conveying tube; 45. Intermittent hole; 46. Extrusion plate. 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: an injection molding mold for manufacturing a hair dryer shell, including a base 1, two bases 1 are symmetrically arranged, wherein the base 1 supports the mold, and slide rods 2 are symmetrically fixedly connected to the upper surface of the base 1, wherein the slide rods 2 are arranged in pairs, and further includes:

[0032] The lower module 3 is fixedly connected to the upper surface of the base 1, and the lower module 3 is set to a fixed state.

[0033] The upper module 4 is slidably connected to the outer surface of the slide rod 2 of the base 1 on both sides, wherein the upper module 4 and the lower module 3 are aligned and engaged with each other;

[0034] The lower module 3 includes a base plate 31. The lower surfaces of both sides of the base plate 31 are fixedly connected to the upper surface of the base 1. A sliding groove 32 is symmetrically opened through the upper surface of the base plate 31. A sliding ring 33 is slidably connected in the sliding groove 32. An inner cylinder 34 is fixedly connected to the inner surface of the sliding ring 33. A stabilizing tube 35 is fixedly connected to the upper edge of the sliding ring 33. The top of the stabilizing tube 35 and the top of the inner cylinder 34 are set to the same horizontal plane. Initially, the top of the stabilizing tube 35 is set to the same horizontal plane as the upper surface of the base plate 31.

[0035] Pull rods 36 are slidably connected to the outer surfaces of both sides of the stabilizing tube 35. The top of the pull rods 36 is fixedly connected to the bottom surfaces of both sides of the upper module 4. A connecting rod 37 is fixedly connected to the bottom of the pull rods 36. The connecting rod 37 is set in the gap below the base plate 31. A drive tube 38 is fixedly connected to the end of the connecting rod 37 away from the pull rods 36.

[0036] A sealing ring 39 is fixedly connected to the top of the drive tube 38. A guide rod 310 is slidably connected through the lower middle surface of the sealing ring 39. The top of the guide rod 310 is fixedly connected to the top inner surface of the inner cylinder 34, and the outer surface of the sealing ring 39 is slidably connected to the inner surface of the inner cylinder 34.

[0037] A connecting tube 311 is slidably connected to the bottom outer surface of the guide rod 310. The bottom of the connecting tube 311 is fixedly connected to the middle upper surface of the sealing ring 39. A collar 312 is fixedly connected to the top of the connecting tube 311. The collar 312 is slidably sleeved on the outer surface of the guide rod 310.

[0038] An installation tube 313 is provided on the outer side of the collar 312. The end of the installation tube 313 away from the collar 312 is fixedly connected to the outer surface of the inner cylinder 34. A working tube 314 is provided inside the inner cylinder 34. The outer end of the working tube 314 is closed. A connecting block 315 is fixedly connected to the outer surface of the end of the working tube 314 near the collar 312. The outer end of the connecting block 315 is fixedly connected to the inner surface of the installation tube 313 near the collar 312.

[0039] The outer end of the working tube 314 is provided with a through groove 316. The outer surface of the working tube 314 away from the collar 312 is slidably connected to a mating ring 317. Initially, the mating ring 317 blocks the through groove 316. The inner surface of the mating ring 317 is fixedly connected to a pull rope 318. The end of the pull rope 318 away from the mating ring 317 is fixedly connected to the outer surface of the collar 312. The side surface of the mating ring 317 near the collar 312 is fixedly connected to a corrugated plate 319, which is set as an elastic plate.

[0040] The upper surface of the sliding ring 33 is slidably connected to a first plug plate 320. The first plug plate 320 is fixedly spaced at three intervals around the central axis of the sliding ring 33. The two sides of the first plug plate 320 are slidably plugged with second plug plates 321. The first plug plate 320 is combined into a circular tube shape under the limiting action of the second plug plate 321.

[0041] The interior of the stabilizing tube 35 is hollow, and a pull plate 322 is slidably connected inside the stabilizing tube 35. The pull plates 322 are arranged symmetrically in pairs, and there are three sets of pull plates 322. The cavity between each set of pull plates 322 is connected to the internal cavity of the inner cylinder 34. A pull tab 323 is fixedly connected to the inner surface of the pull plate 322. The end of the pull tab 323 away from the pull plate 322 passes through the stabilizing tube 35 and is fixedly connected to the outer surface of the first plug plate 320.

[0042] Second embodiment: as follows Figures 1 to 8 As shown, the upper module 4 includes a cover plate 41, with slide plates 42 symmetrically fixedly connected to both ends of the cover plate 41. A slide rod 2 is slidably connected to the slide rod 2. The interior of the cover plate 41 is hollow. An injection hole 43 is opened through the upper surface of the middle part of the cover plate 41. A conveying pipe 44 is fixedly connected through the bottom surface of the inner part of the cover plate 41. The top of the conveying pipe 44 is fixedly connected to the upper surface of the inner part of the cover plate 41. The bottom of the conveying pipe 44 is directly opposite the cavity between the inner cylinder 34 and the first insertion plate 320. An intermittent hole 45 is opened at the bottom of the conveying pipe 44. An extrusion plate 46 is elastically slidably connected to the outer surface of the conveying pipe 44. The extrusion plate 46 is initially positioned above the intermittent hole 45.

[0043] During operation, if injection molding of the blower nozzle housing is required, the cover plate 41 can be pushed down using hydraulic equipment until it contacts and presses against the base plate 31. At this point, raw material is fed into the cover plate 41 through the injection hole 43. After entering the cover plate 41, the raw material enters the cavity between the inner cylinder 34 of the lower mold 3 and the cylindrical tube formed by the first insert plate 320 through the intermittent hole 45 on the conveying pipe 44, thus completing the injection molding process. During this process, the raw material initially exists on the extrusion plate 46 after entering the cover plate 41. As more and more raw material is input, the extrusion pressure on the extrusion plate 46 increases, causing it to move downwards along the conveying pipe 44, eventually causing the intermittent hole 45 on the conveying pipe 44 to contact the cover plate 41. The top cavity is open, allowing raw materials to be fed into the lower module 3 through intermittent holes 45. After feeding, the extrusion plate 46, having lost its extrusion pressure, resets under the action of elasticity and moves upward, creating a negative pressure state in the bottom cavity of the extrusion plate 46. This generates a reverse suction force on the feed pipe 44, automatically cleaning it after injection molding. This prevents the feed pipe 44 from accumulating a large amount of raw material and causing blockages during continuous injection molding, while also ensuring the cleanliness of the lower module 3. This greatly improves ease of use. Furthermore, by placing the entire mold within the lower module 3, the nozzle shell can be integrally molded, avoiding the problem of existing injection molding equipment where the mold cavity is composed of both the upper and lower modules 4, resulting in gaps in the nozzle shell after injection molding. The mold-closing line requires subsequent processing. Simultaneously, after injection molding, the hydraulic equipment can be driven to reverse the movement of the cover plate 41 upwards. As the cover plate 41 moves upwards, it pulls the drive pipe 38 upwards via the pull rod 36. This means that initially, the drive pipe 38 begins to compress the sealing ring 39, causing the sealing plate to move along the guide rod 310 into the inner cylinder 34. This increases the internal air pressure of the inner cylinder 34. Simultaneously, the upward movement of the sealing plate also drives the collar 312 upwards, which in turn stretches the mating ring 317 inwards along the working pipe 314. Ultimately, the internal air pressure of the inner cylinder 34 is input through the connecting groove 316 on the working pipe 314 to the inside of the injection-molded nozzle shell, thus achieving automatic demolding of the nozzle shell using pneumatic assistance. This significantly improves the efficiency of injection molding, and the entire process is fully automated, greatly reducing the usage standards of the mold. When the nozzle housing is removed, the cover plate 41 moves down to reset, causing the mating ring 317 to reset and re-block the inner cylinder 34, facilitating the next injection molding, thus achieving rapid and continuous injection molding production and greatly increasing injection molding output. When the internal air pressure of the inner cylinder 34 increases, it will also transport the internal air pressure to the inside of the pull plate 322 in the stabilizing tube 35, thereby causing the pull plates 322 in the same group to slide in opposite directions, and then pull the first plug plate 320 outward through the pull tab 323. Due to the limiting effect of the second plug plate 321, the three first plug plates 320 move outward synchronously, thereby causing the inner surface of the plug plate to automatically detach from the outer surface of the nozzle housing.This allows the first insert plate 320 on the outer side of the nozzle housing to automatically move and demold the outer surface of the nozzle housing during pneumatic demolding of the inner side, thereby significantly improving the production efficiency of the nozzle housing.

[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. An injection molding mold for manufacturing a hair dryer housing, comprising a base (1), characterized in that: Two bases (1) are symmetrically arranged, wherein the base (1) supports the mold, and the upper surface of the base (1) is symmetrically fixedly connected with sliding rods (2), wherein the sliding rods (2) are arranged in pairs, and further include: The lower module (3) is fixedly connected to the upper surface of the base (1) and is set to a fixed state. The upper module (4) is slidably connected on both sides to the outer surface of the slide rod (2) of the base (1), wherein the upper module (4) and the lower module (3) are aligned and engaged with each other; The lower module (3) includes a base plate (31). The lower surfaces of both sides of the base plate (31) are fixedly connected to the upper surface of the base (1). The upper surface of the base plate (31) is symmetrically provided with a sliding groove (32). A sliding ring (33) is slidably connected in the sliding groove (32). An inner cylinder (34) is fixedly connected to the inner surface of the sliding ring (33). A stabilizing tube (35) is fixedly connected to the upper edge of the sliding ring (33). The top of the stabilizing tube (35) and the top of the inner cylinder (34) are set to the same horizontal plane. Initially, the top of the stabilizing tube (35) is set to the same horizontal plane as the upper surface of the base plate (31). Pull rods (36) are slidably connected to the outer surfaces of both sides of the stabilizing tube (35). The top of the pull rods (36) is fixedly connected to the bottom surfaces of both sides of the upper module (4). A connecting rod (37) is fixedly connected to the bottom of the pull rods (36). The connecting rods (37) are set in the gap below the bottom plate (31). A drive tube (38) is fixedly connected to the end of the connecting rods (37) away from the pull rods (36). A sealing ring (39) is fixedly connected to the top of the drive tube (38), and a guide rod (310) is slidably connected through the lower middle surface of the sealing ring (39). The top of the guide rod (310) is fixedly connected to the top inner surface of the inner cylinder (34), and the outer surface of the sealing ring (39) is slidably connected to the inner surface of the inner cylinder (34). The bottom outer surface of the guide rod (310) is slidably connected to a connecting tube (311), the bottom of the connecting tube (311) is fixedly connected to the middle upper surface of the sealing ring (39), and the top of the connecting tube (311) is fixedly connected to a collar (312), which is slidably sleeved on the outer surface of the guide rod (310). An installation tube (313) is provided on the outside of the collar (312). The end of the installation tube (313) away from the collar (312) is fixedly connected to the outer surface of the inner cylinder (34). The inner cylinder (34) is provided with a working tube (314). The outer end of the working tube (314) is closed. A connecting block (315) is fixedly connected to the outer surface of the end of the working tube (314) near the collar (312). The outer end of the connecting block (315) is fixedly connected to the inner surface of the installation tube (313) near the collar (312). The outer end of the working tube (314) is provided with a through groove (316). A mating ring (317) is slidably connected to the outer surface of the end of the working tube (314) away from the collar (312). The mating ring (317) initially blocks the through groove (316). A pull rope (318) is fixedly connected to the inner surface of the mating ring (317). The end of the pull rope (318) away from the mating ring (317) is fixedly connected to the outer surface of the collar (312). A corrugated plate (319) is fixedly connected to the side surface of the mating ring (317) near the collar (312). The corrugated plate (319) is set as an elastic plate.

2. The injection molding mold for manufacturing a hair dryer housing according to claim 1, characterized in that: The upper surface of the sliding ring (33) is slidably connected to a first plug plate (320). The first plug plate (320) is fixedly spaced three times around the central axis of the sliding ring (33). The two sides of the first plug plate (320) are slidably connected to second plug plates (321). The first plug plate (320) is combined into a circular tube shape under the limiting action of the second plug plate (321).

3. The injection molding mold for manufacturing a hair dryer housing according to claim 2, characterized in that: The interior of the stabilizing tube (35) is hollow. A pull plate (322) is slidably connected inside the stabilizing tube (35). The pull plates (322) are arranged in pairs symmetrically as a group. There are three groups of pull plates (322). The cavity between each group of pull plates (322) is connected to the cavity inside the inner cylinder (34). A pull tab (323) is fixedly connected to the inner surface of the pull plate (322). The end of the pull tab (323) away from the pull plate (322) passes through the stabilizing tube (35) and is fixedly connected to the outer surface of the first plug-in plate (320).

4. The injection molding mold for manufacturing a hair dryer housing according to claim 3, characterized in that: The upper module (4) includes a cover plate (41), with slide plates (42) symmetrically fixedly connected to both ends of the cover plate (41). The slide rod (2) is slidably connected to the slide plate (42). The interior of the cover plate (41) is hollow. An injection hole (43) is opened through the upper surface of the middle part of the cover plate (41). A conveying pipe (44) is fixedly connected through the bottom surface of the inner part of the cover plate (41). The top of the conveying pipe (44) is fixedly connected to the upper surface of the inner part of the cover plate (41). The bottom of the conveying pipe (44) is directly opposite the cavity between the inner cylinder (34) and the first plug plate (320). An intermittent hole (45) is opened at the bottom of the conveying pipe (44). An extrusion plate (46) is elastically slidably connected to the outer surface of the conveying pipe (44). The extrusion plate (46) is initially positioned above the intermittent hole (45).

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