Demolding assembly for production and injection molding of air conditioner shell

Abstract

The utility model relates to the technical field of molds, discloses a demolding assembly for production and injection molding of an air conditioner shell, and aims to solve the problems that an existing demolding assembly depends on a single-point ejector pin and lacks an auxiliary means for demolding, and the surface of a product is easily traced, deformed and even fractured due to local stress concentration. Comprising a supporting table, a fixing frame, a transmission mechanism, a mold closing mechanism and a demolding mechanism, a guide column and a limiting column guarantee stable movement, a sealing structure improves the injection molding precision, the demolding time is remarkably shortened, and during demolding, a hydraulic pump reversely enables a lower mold to descend, an electric telescopic rod pulls an upper mold to ascend, and a rack drives a circular gear and a bevel gear set to conduct transmission; the ejection part is driven to move along the guide rail, the conjunction block of the ejection part is in large-area contact with the air conditioner shell, the air inlet pipe sprays air through the air holes to cool the shell, friction force and adhesive force of the mold are reduced, stable ejection is achieved, action synchronization is guaranteed through gear and rack linkage, and therefore the demolding time is remarkably shortened, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of molds, specifically a demolding component for injection molding of air conditioner housings. Background Technology

[0002] Currently, air conditioners are common household appliances in people's daily lives. Air conditioners typically have an air inlet and an air outlet on the inner unit's outer casing. During the manufacturing process of air conditioners, the outer casing is generally arc-shaped and highly irregular, with no flat surface for placement or clamping. Faced with such an irregular shape, the outer casing of the air conditioner is usually formed by integral extrusion injection molding. The advantages of injection molding are fast production speed, high efficiency, automated operation, a wide variety of colors and patterns, shapes ranging from simple to complex, sizes ranging from large to small, precise product dimensions, easy product updates and replacements, and the ability to produce complex-shaped parts. Injection molding is suitable for mass production and molding processing fields such as complex-shaped products.

[0003] Chinese patent CN214239369U discloses a quick demolding mold for the bottom shell of an air conditioner outdoor unit. A top plate is fixedly connected to the bottom plate via several support columns. Two symmetrically arranged frame plates are fixedly connected to the upper surface of the top plate. A geared motor is mounted on one side of the right-hand frame plate. The output end of the geared motor passes through the adjacent frame plate and is fixedly connected to a rotating shaft (shaft one) via a coupling. The other end of the rotating shaft (shaft one) is fixedly connected to a lower mold body. A rotating shaft (shaft two) is fixedly connected to the other side of the lower mold body. The other end of the rotating shaft (shaft two) is rotatably connected to the side of the adjacent frame plate via a bearing. An upper mold body is mounted on the upper surface of the lower mold body. This application avoids the need for manual removal of the air conditioner outdoor unit bottom shell using tools during demolding, reducing the labor intensity of workers, increasing the demolding speed, and improving the production efficiency of the air conditioner outdoor unit bottom shell.

[0004] Regarding the above and existing related technologies, the inventors believe that the following defects often exist: During the demolding process, the component relies on ejector pins to directly eject the product, lacking auxiliary demolding methods. Single-point ejection by ejector pins can easily lead to local stress concentration, which may cause obvious ejection marks on the product surface, affecting the appearance quality, and causing problems such as deformation or breakage of the bottom shell. Utility Model Content

[0005] The technical problem to be solved by this utility model is that the existing technology has the disadvantage that the demolding component for the injection molding of air conditioner housing has uneven demolding or product deformation due to the small area of ​​the ejector block during demolding, resulting in excessive local adhesion force. To this end, we propose a demolding component for the injection molding of air conditioner housing.

[0006] To achieve the above objectives, this application adopts the following technical solution: a demolding assembly for injection molding of an air conditioner casing, comprising: a support platform, a fixed frame disposed on the upper end of the support platform, a transmission mechanism disposed on the upper end of the support platform, the transmission mechanism being located inside the fixed frame, a mold closing mechanism disposed on the upper end of the transmission mechanism, and a demolding mechanism disposed on the inner wall of the fixed frame, the demolding mechanism being located on both sides of the mold closing mechanism;

[0007] The support platform has a groove inside, a hydraulic pump is installed on the inner wall of the groove, a connecting plate is installed at the output end of the hydraulic pump, a supporting cylinder is installed at the upper end of the connecting plate, a lower mold component is installed at the upper end of the transmission mechanism, and an upper mold component is fixedly connected to the upper part of the inner wall of the fixed frame. The upper mold component and the lower mold component form a mold closing mechanism.

[0008] The demolding mechanism includes a fixed plate disposed on one side of the inner wall of the fixed frame, a guide rail disposed above the fixed plate and fixedly connected to the inner wall of the fixed frame, a rotating rod A disposed at the upper end of the fixed plate and rotatably connected to the fixed plate, a spherical gear A disposed on the outer wall of the rotating rod A, a bevel gear A disposed at one end of the rotating rod A and away from the fixed plate, a rotating rod B disposed on the inner wall of the fixed frame and rotatably connected to the inner wall of the fixed frame, the rotating rod B being located above the bevel gear A, bevel gears B disposed at both ends of the rotating rod B and meshing with the bevel gear A, a spherical gear B disposed in the middle of the rotating rod B, and an ejector component disposed at one end of the guide rail.

[0009] Preferably, the ejector component includes a serrated connecting block disposed at one end of the guide rail, a rectangular groove being provided at one end of the guide rail, the serrated connecting block being slidably connected along the inner wall of the rectangular groove, the serrated connecting block being meshed with a spur gear A, and a mating block disposed on one side of the serrated connecting block, the upper surface of the mating block being provided with an air hole, and an air inlet pipe being provided on one side of the mating block.

[0010] Preferably, the upper mold component includes an electric telescopic rod disposed on the upper part of the inner wall of the fixed frame, an upper mold body disposed at the lower end of the electric telescopic rod, an injection tube fixedly connected to the upper end of the upper mold body located on the left side of the electric telescopic rod, and a rack fixedly connected to one side of the outer wall of the upper mold body. The rack and the spur gear B are in the same vertical plane and mesh with each other.

[0011] Preferably, the transmission mechanism includes a support base disposed on the upper end of the support platform, a limiting post disposed at the center of the upper surface of the support base, a support cylinder passing through the support base, a transmission base fixedly connected to the upper end of the support cylinder, a guide post fixedly connected to the upper end of the transmission base, and a sealing ring fixedly connected to the upper end of the guide post.

[0012] Preferably, the lower mold component includes a movable plate disposed on the upper end of the transmission base, a fixed column fixedly connected to the lower end of the movable plate, the fixed column and the limiting column being on the same vertical plane, and a boss fixedly connected to the upper end of the movable plate, the boss being located inside the sealing ring, the boss, the sealing ring and the upper mold body being in close contact to form a sealed space.

[0013] Preferably, the upper end of the movable plate has a through hole, the hole is located outside the boss, the diameter of the hole matches the guide post, the hole and the guide post are in the same vertical plane, the movable plate and the guide post are slidably connected, and the lower surface of the injection tube is flush with the lower surface of the upper mold body.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] This utility model proposes a demolding component for injection molding of air conditioner housings. It is configured with a demolding mechanism, a mold closing mechanism, and a rotating mechanism. During operation, the mating block in the demolding mechanism makes large-area contact with the molded air conditioner housing. Combined with the gas ejected from the air vents, mechanical ejection and gas-assisted demolding are achieved. The gas can not only quickly cool the housing, but also significantly reduce the friction and adhesion between the housing and the mold, avoiding deformation or tearing caused by local stress concentration. Attached Figure Description

[0016] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the overall unfolded structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the ejector component structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the demolding mechanism of this utility model;

[0021] Figure 5 This is a schematic diagram of the upper mold mechanism of this utility model;

[0022] Figure 6 This is a schematic diagram of the lower mold mechanism of this utility model;

[0023] Figure 7 This is a schematic diagram of the transmission mechanism structure of this utility model.

[0024] In the diagram: 1. Support platform; 11. Hydraulic pump; 12. Connecting plate; 13. Support cylinder; 2. Demolding mechanism; 21. Fixed plate; 22. Rotating rod A; 23. Bevel gear A; 24. Bevel gear B; 25. Circular gear B; 26. Circular gear A; 27. Rotating rod B; 28. Guide rail; 29. ​​Ejector component; 291. Fitting block; 292. Air inlet pipe; 293. Serrated connecting block; 394. Air hole; 3. Mold closing mechanism; 31. Lower mold component; 311. Boss; 312. Movable plate; 313. Fixed column; 314. Circular hole; 32. Upper mold component; 321. Upper mold body; 322. Rack; 323. Injection tube; 324. Electric telescopic rod; 4. Fixed frame; 5. Transmission mechanism; 51. Support base; 52. Limiting column; 53. Transmission base; 54. Guide column; 55. Sealing ring. Detailed Implementation

[0025] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0026] Reference Figure 1 , Figure 2 and Figure 4 As shown, this utility model provides a technical solution: a demolding assembly for injection molding of air conditioner housing, comprising: a support platform 1, a fixed frame 4 disposed on the upper end of the support platform 1, a transmission mechanism 5 disposed on the upper end of the support platform 1, the transmission mechanism 5 being located inside the fixed frame 4, a mold closing mechanism 3 disposed on the upper end of the transmission mechanism 5, and a demolding mechanism 2 disposed on the inner wall of the fixed frame 4, the demolding mechanism 2 being located on both sides of the mold closing mechanism 3.

[0027] The support platform 1 has a groove inside, and a hydraulic pump 11 is installed on the inner wall of the groove. A connecting plate 12 is installed at the output end of the hydraulic pump 11. A supporting cylinder 13 is installed at the upper end of the connecting plate 12. A lower mold component 31 is installed at the upper end of the transmission mechanism 5. An upper mold component 32 is fixedly connected to the upper part of the inner wall of the fixing frame 4. The upper mold component 32 and the lower mold component 31 form a mold closing mechanism 3.

[0028] The demolding mechanism 2 includes a fixed plate 21 disposed on one side of the inner wall of the fixed frame 4, a guide rail 28 disposed above the fixed plate 21 and fixedly connected to the inner wall of the fixed frame 4, a rotating rod A22 disposed on the upper end of the fixed plate 21 and rotatably connected to the fixed plate 21, a spur gear A26 disposed on the outer wall of the rotating rod A22, a bevel gear A23 disposed at one end of the rotating rod A22 and away from the fixed plate 21, and a rotating rod B27 disposed on the inner wall of the fixed frame 4 and connected to the fixed plate 21. The inner wall of frame 4 is rotatably connected. Rotating rod B27 is located above bevel gear A23. Bevel gears B24 are provided at both ends of rotating rod B27, and bevel gears B24 mesh with bevel gear A23. Circular gear B25 is provided in the middle of rotating rod B27. One end of guide rail 28 is provided with ejector component 29. Hydraulic pump 11 in the internal groove of support platform 1 is started, and its output end pushes connecting plate 12 to move upward. Connecting plate 12 drives support cylinder 13 to move upward, and support cylinder 13 drives transmission mechanism 5 to move synchronously. This causes the lower mold component 31 to move upward. After the lower mold component 31 contacts and fits tightly with the upper mold component 32, the mold closing is completed. At this time, the injection molding operation can be performed, injecting the plastic raw material of the air conditioner shell into the mold cavity composed of the upper mold component 32 and the lower mold component 31. During the injection molding stage, after the plastic raw material gradually forms the shape of the air conditioner shell in the mold cavity, the hydraulic pump 11 works in reverse, driving the connecting plate 12, the support cylinder 13 and the lower mold component 31 to move downward. The upper mold component 32 then moves upward, and the spur gear B25 rotates accordingly. The rotation of the spur gear B25 drives the rotating rod B27 to rotate, which in turn causes the bevel gears B24 at both ends of the rotating rod B27 to rotate. Since the bevel gears B24 mesh with the bevel gears A23, they drive the spur gear A26 on the rotating rod A22 to rotate. The rotation of the spur gear B25 will drive the ejector component 29 that it is engaged with to move along the guide rail 28. The ejector component 29 moves towards the mold cavity, ejecting the formed air conditioner shell from the mold, realizing the demolding operation, which is convenient for manual handling.

[0029] Reference Figure 3 and Figure 4As shown, in this embodiment: the ejector component 29 includes a serrated connecting block 293 disposed at one end of the guide rail 28. A rectangular groove is provided at one end of the guide rail 28. The serrated connecting block 293 slides along the inner wall of the rectangular groove and meshes with the spur gear A26. A mating block 291 is disposed on one side of the serrated connecting block 293. An air hole 394 is provided on the upper surface of the mating block 291, and an air inlet pipe 292 is provided on one side of the mating block 291. Because the spur gear A26 meshes with the serrated connecting block 293, the rotation of the spur gear A26 drives the serrated connecting block 293 to slide along the rectangular groove at one end of the guide rail 28. The serrated connecting block 293 drives the mating block 291 towards the mold. As the cavity moves, the mating block 291 directly acts on the formed air conditioner housing, initiating the initial ejection action, causing the air conditioner housing to initially separate from the mold. During the ejection process of the mating block 291, gas enters the interior of the mating block 291 through the air inlet pipe 292 and is ejected from the air holes 394 opened on the upper surface of the mating block 291. The ejected gas can cool the formed air conditioner housing, further reducing the friction and adhesion between the air conditioner housing and the mold, assisting the mechanical ejection action, and enabling the air conditioner housing to be more smoothly removed from the mold. The large contact area between the air conditioner housing and the mating block 291 allows the ejection action to be carried out evenly and smoothly, greatly shortening the demolding time and improving production efficiency.

[0030] Reference Figure 1 , Figure 4 and Figure 5 As shown, in this embodiment: the upper mold component 32 includes an electric telescopic rod 324 disposed on the upper part of the inner wall of the fixed frame 4, and an upper mold body 321 disposed at the lower end of the electric telescopic rod 324. An injection tube 323 is fixedly connected to the upper end of the upper mold body 321 on the left side of the electric telescopic rod 324. A rack 322 is fixedly connected to one side of the outer wall of the upper mold body 321. The rack 322 and the spur gear B25 are on the same vertical plane and mesh with each other. When the lower mold component 31 moves upward, the electric telescopic rod 324 is activated, its output end extends, and the electric telescopic rod 324 pushes the upper mold body 321 downward, intersecting with the lower mold component 324. 1. Gradually approach and finally complete the mold closing. After the mold closing is completed, the plastic raw material of the air conditioner shell is injected into the mold cavity composed of the upper mold body 321 and the lower mold component 31 through the injection tube 323. The raw material forms the shape of the air conditioner shell in the mold cavity. After the mold closing is completed, the electric telescopic rod 324 retracts, driving the upper mold body 321 to move upward. The rack 322 moves upward with the upper mold body 321. Since the rack 322 meshes with the spur gear B25, the upward movement of the rack 322 drives the spur gear B25 to rotate, driving the demolding mechanism 2 to move synchronously. This makes the various actions in the demolding process interconnected and coordinated, ensuring the continuity and stability of the demolding process.

[0031] Reference Figure 7 As shown in this embodiment: the transmission mechanism 5 includes a support base 51 set on the upper end of the support platform 1, a limiting post 52 set at the center of the upper surface of the support base 51, a support cylinder 13 passing through the support base 51, a transmission base 53 fixedly connected to the upper end of the support cylinder 13, a guide post 54 fixedly connected to the upper end of the transmission base 53, and a sealing ring 55 fixedly connected to the upper end of the guide post 54. When the hydraulic pump 11 is started, its output end pushes the connecting plate 12 to move upward. Since the connecting plate 12 is connected to the support cylinder 13, the support cylinder 13 will move upward. The support cylinder 13 passes through the support base 51. Under the restriction of the support base 51, the support cylinder 13 can only rise steadily in the vertical direction. The support cylinder 13 drives the transmission base 53 to move upward. The guide post 54 and the sealing ring 55 on the transmission base 53 also rise accordingly, preventing external impurities from entering the mold and affecting the injection molding quality.

[0032] Reference Figure 6 and Figure 7 As shown in this embodiment: the lower mold component 31 includes a movable plate 312 disposed on the upper end of the transmission base 53. A fixing post 313 is fixedly connected to the lower end of the movable plate 312. The fixing post 313 and the limiting post 52 are on the same vertical plane. A boss 311 is fixedly connected to the upper end of the movable plate 312. The boss 311 is located inside the sealing ring 55. The boss 311, the sealing ring 55, and the upper mold body 321 are in close contact to form a sealed space. The sealed space formed by the boss 311, the sealing ring 55, and the upper mold body 321 can effectively prevent over-injection molding. During the process, leakage of plastic raw materials is prevented, ensuring that the raw materials are formed within the predetermined space, thereby improving the molding quality and dimensional accuracy of the air conditioner casing. After the mold is separated and the fixed column 313 descends to a certain height, the fixed column 313 contacts the limiting column 52. After contact, the height of the fixed column 313 is fixed, so that the height of the movable plate 312 and the boss (311) no longer changes. The sealing ring 55 continues to descend. At this time, the formed air conditioner casing is temporarily stuck on the surface of the boss 311. The ejector component 29 can more easily eject the air conditioner casing from the boss 311, improving the demolding efficiency.

[0033] Reference Figure 6 and Figure 7 As shown in this embodiment: a circular hole 314 penetrates the upper end of the movable plate 312. The circular hole 314 is located outside the boss 311. The diameter of the circular hole 314 matches that of the guide post 54. The circular hole 314 and the guide post 54 are on the same vertical plane. The movable plate 312 is slidably connected to the guide post 54. The lower surface of the injection tube 323 is flush with the lower surface of the upper mold body 321. Through the cooperation of the circular hole 314 and the guide post 54, the movable plate 312 ensures that the lower mold component 31 moves smoothly without shaking during its up and down movement. The outlet of the injection tube 323 is flush with the lower surface of the upper mold body 321, avoiding uneven filling during material injection that could cause product deformation.

[0034] Working principle: The user starts the hydraulic pump 11, whose output pushes the connecting plate 12 upward, causing the supporting cylinder 13 and the transmission mechanism 5 to rise synchronously. This causes the boss 311 of the lower mold component 31 to contact and fit tightly with the upper mold body 321 of the upper mold component 32, forming a closed injection space composed of the boss 311, the sealing ring 55, and the upper mold body 321, thus completing the mold closing. At this time, the plastic raw material of the air conditioner shell is injected into the mold cavity through the injection tube 323. The raw material cools and solidifies in the cavity. After injection molding is completed, the hydraulic pump 11 reverses its operation, causing the supporting cylinder 13 and the lower mold component 31 to move downward. At the same time, the electric telescopic rod 324 retracts, pulling the upper mold body 321 upward, causing the upper and lower molds to separate. When the upper mold body 321 rises, the rack 322 on its outer wall moves synchronously, driving the meshing spur gear B25 to rotate. Through the meshing transmission of the bevel gear B24 and the bevel gear A23, the rotating rod A22 is driven. The rotation of the spur gear A26 drives the sawtooth connecting block 293 of the ejector component 29 to slide along the rectangular groove of the guide rail 28, pushing the mating block 291 to move towards the mold cavity. While the mating block 291 contacts the molded air conditioner shell and applies ejection force, the air inlet pipe 292 introduces gas into the mating block 291. The gas is ejected from the air hole 394, which quickly cools the shell and reduces the friction and adhesion between it and the mold. When the fixed column 313 descends to contact the limit column 52, the height of the movable plate 312 and the boss 311 is fixed. At this time, the mating block 291 smoothly ejects the shell from the surface of the boss 311, realizing demolding. Throughout the process, the guide column 54 cooperates with the round hole 314 of the movable plate 312 to ensure the vertical movement of the lower mold component 31 is stable. The sealing ring 55 prevents the leakage of raw materials during injection molding and ensures the molding accuracy of the shell. The demolding mechanism 2 and the mold closing mechanism 3 are linked by gears and racks, and their actions are continuous and synchronous, which significantly improves the demolding efficiency and product quality.

[0035] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A demolding assembly for injection molding of an air conditioner casing, characterized in that: It includes a support platform, a fixed frame set on the upper part of the support platform, a transmission mechanism set on the upper part of the support platform, the transmission mechanism being located inside the fixed frame, a mold closing mechanism set on the upper part of the transmission mechanism, and a demolding mechanism set on the inner wall of the fixed frame, the demolding mechanism being located on both sides of the mold closing mechanism. The support platform has a groove inside, a hydraulic pump is installed on the inner wall of the groove, a connecting plate is installed at the output end of the hydraulic pump, a supporting cylinder is installed at the upper end of the connecting plate, a lower mold component is installed at the upper end of the transmission mechanism, and an upper mold component is fixedly connected to the upper part of the inner wall of the fixed frame. The upper mold component and the lower mold component form a mold closing mechanism. The demolding mechanism includes a fixed plate disposed on one side of the inner wall of the fixed frame, a guide rail disposed above the fixed plate and fixedly connected to the inner wall of the fixed frame, a rotating rod A disposed at the upper end of the fixed plate and rotatably connected to the fixed plate, a spherical gear A disposed on the outer wall of the rotating rod A, a bevel gear A disposed at one end of the rotating rod A and away from the fixed plate, a rotating rod B disposed on the inner wall of the fixed frame and rotatably connected to the inner wall of the fixed frame, the rotating rod B being located above the bevel gear A, bevel gears B disposed at both ends of the rotating rod B and meshing with the bevel gear A, a spherical gear B disposed in the middle of the rotating rod B, and an ejector component disposed at one end of the guide rail.

2. The demolding assembly for injection molding of an air conditioner casing according to claim 1, characterized in that: The ejector component includes a sawtooth connecting block disposed at one end of the guide rail, a rectangular groove being provided at one end of the guide rail, the sawtooth connecting block being slidably connected along the inner wall of the rectangular groove, the sawtooth connecting block being meshed with a spur gear A, and a mating block disposed on one side of the sawtooth connecting block, the upper surface of the mating block being provided with an air hole, and an air inlet pipe being provided on one side of the mating block.

3. The demolding assembly for injection molding of an air conditioner housing according to claim 1, characterized in that: The upper mold component includes an electric telescopic rod located on the upper part of the inner wall of the fixed frame, an upper mold body located at the lower end of the electric telescopic rod, an injection tube fixedly connected to the upper end of the upper mold body on the left side of the electric telescopic rod, and a rack fixedly connected to one side of the outer wall of the upper mold body. The rack and the spur gear B are in the same vertical plane and mesh with each other.

4. A demolding assembly for injection molding of an air conditioner housing according to claim 3, characterized in that: The transmission mechanism includes a support base set on the upper end of the support platform, a limiting post set at the center of the upper surface of the support base, a support cylinder passing through the support base, a transmission base fixedly connected to the upper end of the support cylinder, a guide post fixedly connected to the upper end of the transmission base, and a sealing ring fixedly connected to the upper end of the guide post.

5. A demolding assembly for injection molding of an air conditioner housing according to claim 4, characterized in that: The lower mold component includes a movable plate disposed on the upper end of the transmission base. A fixed column is fixedly connected to the lower end of the movable plate. The fixed column and the limiting column are on the same vertical plane. A boss is fixedly connected to the upper end of the movable plate. The boss is located inside the sealing ring. The boss, the sealing ring and the upper mold body are in close contact to form a sealed space.

6. A demolding assembly for injection molding of an air conditioner housing according to claim 5, characterized in that: The upper end of the movable plate has a through hole, which is located outside the boss. The diameter of the hole matches the guide post. The hole and the guide post are on the same vertical plane. The movable plate and the guide post are slidably connected. The lower surface of the injection tube is flush with the lower surface of the upper mold body.

Images