Injection molding device for water tank of electric iron

Abstract

The utility model belongs to injection moulding technical field, concretely speaking is a kind of electric iron water storage tank injection moulding device, including support plate, three movable rods are slidably installed in the inside of support plate with equal distance, and the one end of movable rod is equipped with ramming ball, three compression springs are fixedly connected with equal distance between connecting plate and support plate, the top of rotating shaft is equipped with cam rotating shaft, and the bottom of rotating shaft is equipped with driving wheel and driven wheel respectively, and driving wheel and driven wheel are connected by belt cooperation between them;Driving motor starts to drive driving wheel and rotating shaft rotation, and driven wheel is linked by belt, so that cam synchronous operation is realized, when cam protrusion contacts with connecting plate, movable rod compression spring is pushed, ramming ball moves towards mould, after cam protrusion leaves, spring reset drives ramming ball to move back, and this cycle makes ramming ball continuously knock lower mould, vibration is transmitted to mould cavity molten raw material, accelerates bubble to discharge and promotes raw material uniform filling, effectively improves the structure compactness and performance of water storage tank after forming.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, specifically an injection molding device for an electric iron water tank. Background Technology

[0002] The water tank of an electric iron is a component inside the iron used to store liquid water. In industrial steam irons, it is mostly rectangular in shape. The water tank can be produced into a rectangular shape through injection molding, which requires the use of an injection molding device.

[0003] A Chinese patent with authorization announcement number CN116175894A discloses an injection mold for the main body of a humidifier water tank, including an injection platform. A support frame is fixedly connected to the upper end of the injection platform, and an upper mold assembly is provided on the outer side of the support frame. A cabinet is fixedly connected to the lower end of the injection platform, and a cabinet door is hinged to the front of the cabinet. The lower mold assembly includes a lower mold with one end fixedly connected to the upper end of the injection platform, and an injection groove is opened at the upper end of the lower mold. Through the cooperation of a first pump body and a water passage hole, since the water passage hole is located inside the lower mold and one end of the inner wall is spiral-shaped, the activated first pump body delivers the cooling water in the water tank to the lower mold and replaces the cooling water in time, which can speed up the cooling time of the mold during injection and improve production efficiency.

[0004] However, the above-mentioned device still has some problems. In practical applications, the melt flow during injection molding will carry gas, which will cause bubbles to be generated during injection molding. In the existing technology, it is not easy to remove the bubbles, which will form hollow defects after cooling and solidification. As stress concentration points, the bubbles will destroy the continuity of the plastic molecular chain and reduce the appearance quality of the water tank. Therefore, an injection molding device for electric iron water tank is proposed to address the above problems. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology and solve the problems mentioned in the background technology, this utility model proposes an injection molding device for an electric iron water tank.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: The present utility model provides an injection molding device for an electric iron water tank, comprising a worktable. Two support plates are symmetrically installed on the top side of the worktable. Three movable rods are equidistantly slidably installed inside the support plates. One end of each movable rod is equipped with a striking ball, and the other end of each movable rod is fitted with a connecting plate. Three compression springs are equidistantly fixed between the connecting plate and the support plates. The compression springs are respectively sleeved on the outer side of the movable rods. A groove is formed inside the bottom side of the worktable. Two rotating shafts are symmetrically rotatably installed through the groove on the top side of the worktable. A cam is installed at the top of each rotating shaft. During operation, the cam contacts the connecting plate. A drive wheel and a driven wheel are respectively installed at the bottom of the rotating shaft, and the drive wheel and the driven wheel are connected by a belt. A drive motor is installed on the bottom inner wall of the groove. One end of the rotating shaft is connected to the output end of the drive motor. During the injection molding operation, the drive motor drives the rotating shaft to rotate, which in turn causes the cam to rotate. When the cam contacts the connecting plate, it pushes the connecting plate to move, which drives the movable rod and the tamping ball to move. The tamping ball contacts the outside of the lower mold and generates a knocking vibration. This realizes knocking vibration of the lower mold while the injection molding operation is being performed. The vibration makes it easier to remove air bubbles in the molten material in the mold, reducing the generation of air bubbles, thereby improving the quality of the water tank injection molding and making the structure of the molded water tank more compact and the performance more stable.

[0007] Preferably, support columns are installed at the four corners of the top side of the workbench, a fixed plate is installed on the top side of the support column, a cylinder is installed on the top side of the fixed plate, and a movable plate is installed on the working end of the cylinder. The four corners of the movable plate are slidably installed on the outside of the support column. When mold closing is required, the cylinder is activated, and its working end pushes the movable plate to move downward along the support column, thereby driving the upper mold to move downward and complete the mold closing operation with the lower mold. This ensures the accuracy and stability of mold closing, improves the efficiency and precision of injection molding operations, and reduces the defect rate caused by improper mold closing.

[0008] Preferably, an upper mold is installed on the bottom side of the movable plate, and a lower mold is installed on the top side of the workbench. The lower mold has a cavity that matches the upper mold. When the tamping ball moves, it will contact the outside of the lower mold. After the mold is closed, the molten raw material is injected into the mold cavity through the injection tube. The tamping ball's impact on the lower mold makes the raw material more evenly distributed in the mold cavity, which can better fill all corners of the mold cavity and improve the injection molding effect.

[0009] Preferably, an injection tube is connected through the interior of the upper mold, and one end of the injection tube is connected to an external molten raw material source. The external molten raw material source is continuously transported to the mold cavity composed of the upper mold and the lower mold through the injection tube, providing a stable supply of raw materials for the injection molding operation and ensuring the continuity of the injection molding process.

[0010] Preferably, a groove is provided inside the top side of the movable plate, and a limiting plate is slidably installed inside the groove. One end of the limiting plate is slidably installed inside the injection tube, and a screw hole is provided inside the bottom end of the limiting plate. Two mounting plates are symmetrically installed on the top side of the movable plate, and a threaded rod is movably installed through the screw hole between the mounting plates. A handle is installed at one end of the threaded rod. By rotating the handle, the threaded rod is rotated, causing the limiting plate to move in the groove, thereby changing the position of the limiting plate inside the injection tube. This controls the flow area of ​​the raw material inside the injection tube, allowing for flexible adjustment of the raw material flow rate according to different injection requirements and raw material characteristics, avoiding injection defects caused by excessively fast or slow flow rates.

[0011] Preferably, a control panel is installed on one side of the workbench. The control panel is electrically connected to the electrical components inside the device and is used to operate and control the electrical components inside the device. Through the control panel, the operator can centrally control various aspects such as the extension and retraction of the cylinder, the start and stop of the drive motor, and the supply of raw materials for the injection molding tube, making the operation of the entire injection molding device more convenient.

[0012] The advantages of this utility model are:

[0013] 1. After the drive motor of this utility model starts, it drives the active wheel and the rotating shaft to rotate. The driven wheel is linked by the belt to make the cam rotate synchronously. When the cam protrusion contacts the connecting plate, it pushes the movable rod to compress the spring, and the tamping ball moves towards the mold. After the cam protrusion leaves, the spring returns to its original position and drives the tamping ball to move back. This cycle makes the tamping ball continuously strike the lower mold. The vibration is transmitted to the mold cavity to melt the raw material, accelerates the discharge of air bubbles and promotes the uniform filling of raw materials, effectively improving the structural density and performance of the water storage tank after molding.

[0014] 2. In this utility model, rotating the handle drives the threaded rod to rotate. The threaded rod engages with the threaded hole inside the limiting plate, causing the limiting plate to slide within the groove and change its position inside the injection tube. The change in the position of the limiting plate adjusts the flow area of ​​the raw material inside the injection tube. For example, pushing the limiting plate into the injection tube reduces the flow area and decreases the raw material flow rate; conversely, pushing it out increases the flow rate. This allows for flexible adaptation to different raw material characteristics and injection requirements, reducing injection defects. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the intermediate axis side view of the present invention;

[0017] Figure 2 This is a schematic diagram of the first partial structure of the vibration assembly;

[0018] Figure 3 This is a schematic diagram of the second partial structure of the vibration assembly;

[0019] Figure 4 This is a schematic diagram of a partial structure at the upper end of the injection molding device;

[0020] Figure 5 This is a schematic diagram of the flow rate control component.

[0021] In the diagram: 1. Workbench; 2. Support plate; 201. Movable rod; 202. Tamping ball; 203. Connecting plate; 204. Compression spring; 205. Groove; 206. Rotating shaft; 207. Cam; 208. Drive wheel; 209. Driven wheel; 210. Belt; 211. Drive motor; 3. Support column; 301. Fixed plate; 302. Cylinder; 303. Movable plate; 4. Upper mold; 401. Lower mold; 402. Mold cavity; 5. Injection tube; 501. Slide groove; 502. Limiting plate; 503. Mounting plate; 504. Threaded rod; 505. Handle; 6. Control panel. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0023] Please see Figure 1-3As shown, an injection molding device for an electric iron water tank includes a worktable 1. Two support plates 2 are symmetrically mounted on the top side of the worktable 1. Three movable rods 201 are equidistantly slidably mounted inside each support plate 2. A tamping ball 202 is mounted at one end of each movable rod 201, and a connecting plate 203 is mounted at the other end of each rod. Three compression springs 204 are equidistantly fixed between the connecting plate 203 and the support plate 2. The compression springs 204 are respectively sleeved on the outside of the movable rods 201. An opening is formed inside the bottom side of the worktable 1. The worktable 1 has a groove 205. Two rotating shafts 206 are symmetrically and rotatably mounted through the groove 205 on the top side of the worktable 1. A cam 207 is mounted on the top of the rotating shaft 206. The cam 207 will contact the connecting plate 203 during operation. A drive wheel 208 and a driven wheel 209 are respectively mounted on the bottom of the rotating shaft 206. The drive wheel 208 and the driven wheel 209 are connected by a belt 210. A drive motor 211 is mounted on the bottom inner wall of the groove 205. One end of the rotating shaft 206 is connected to the output end of the drive motor 211.

[0024] Support columns 3 are installed at the four corners of the top side of the workbench 1. A fixed plate 301 is installed on the top side of the support column 3. A cylinder 302 is installed on the top side of the fixed plate 301. A movable plate 303 is installed on the working end of the cylinder 302. The four corners of the movable plate 303 are slidably installed on the outside of the support column 3.

[0025] An upper mold 4 is mounted on the bottom side of the movable plate 303, and a lower mold 401 is mounted on the top side of the workbench 1. The lower mold 401 has an internal cavity 402 that matches the upper mold 4. The tamping ball 202 contacts the outer side of the lower mold 401 during movement. A control panel 6 is mounted on one side of the workbench 1. During operation, in practical applications, the melt flow during injection molding carries gas, resulting in air bubbles. In the prior art, it is difficult to remove these bubbles, which form hollow defects after cooling and solidification. These bubbles act as stress... The concentration point disrupts the continuity of the plastic molecular chain, reducing the appearance quality of the water storage tank. The operator starts the cylinder 302 through the control panel 6. The working end of the cylinder 302 pushes the movable plate 303 to move downward along the support column 3. The movable plate 303 drives the upper mold 4 at the bottom to move downward synchronously until it closes with the lower mold 401 on the top side of the workbench 1. The support column 3 guides and limits the movable plate 303, ensuring that the upper mold 4 and the lower mold 401 are accurately aligned, improving the accuracy and stability of mold closing, and reducing the defect rate caused by mold closing deviation.

[0026] During the injection molding process, the drive motor 211 is started via the control panel 6, which drives one of the rotating shafts 206 and the drive wheel 208 to rotate. The drive wheel 208 drives the other rotating shaft 206 and the driven wheel 209 to rotate via the belt 210, which in turn drives the cam 207 to rotate simultaneously. When the protruding part of the cam 207 contacts the connecting plate 203, it pushes the connecting plate 203 to compress the compression spring 204, which drives the movable rod 201 and the tamping ball 202 to move closer to the lower mold 401. The cam 207 continues to rotate, the protruding part leaves the connecting plate 203, the compression spring 204 returns to its original position, and pulls the connecting plate 203 and the tamping ball 202 back. This cycle continues, and the tamping ball 202 continuously strikes both sides of the lower mold 401, causing the molten material in the mold cavity 402 to vibrate, accelerating the discharge of air bubbles, promoting the uniform filling of the mold cavity 402 by the material, and improving the structural density and performance of the water tank after molding.

[0027] Please see Figure 1 , 4 As shown in Figure 5, an injection tube 5 is connected through the interior of the upper mold 4, and one end of the injection tube 5 is connected to an external molten raw material source;

[0028] The movable plate 303 has a groove 501 inside its top side. A limiting plate 502 is slidably installed inside the groove 501. One end of the limiting plate 502 is slidably installed inside the injection tube 5. A screw hole is opened inside the bottom end of the limiting plate 502. Two mounting plates 503 are symmetrically installed on the top side of the movable plate 303. A threaded rod 504 is movably installed between the mounting plates 503 through the screw hole. A handle 505 is installed at one end of the threaded rod 504. During operation, if the flow rate is too fast during injection molding, the raw material is in a turbulent state, and air is drawn in to form bubbles. If the flow rate is too slow, the raw material cools first at the inlet of the mold cavity 402. When the internal melt continues to shrink, there is no subsequent raw material replenishment, forming a vacuum shrinkage cavity. According to the injection molding requirements, the handle 505 is rotated to drive the threaded rod 504. 4. Rotation: The threaded rod 504 engages with the internal threaded hole of the limiting plate 502, allowing the limiting plate 502 to slide within the sliding groove 501, changing its position within the injection tube 5. This change in the position of the limiting plate 502 adjusts the flow area of ​​the raw material within the injection tube 5. Pushing the limiting plate 502 further into the injection tube 5 reduces the flow area and decreases the raw material flow rate; conversely, pushing it further away increases the flow rate. This allows for flexible adaptation to different raw material characteristics and injection requirements, reducing injection defects. An annular sealing groove is provided on the circumferential surface where the limiting plate 502 contacts the inner wall of the injection tube 5, embedding an O-ring silicone seal. The seal is made of high-temperature resistant and chemically corrosion-resistant fluororubber, forming an interference fit with the inner wall of the injection tube 5. When the limiting plate 502 moves to adjust the flow rate, the seal always maintains elastic compression, preventing molten raw material from leaking from the gap between them.

[0029] After the mold closing operation is completed, the molten raw material flows into the mold cavity 402 through the injection pipe 5 to realize the injection molding operation. After the water tank is cooled after molding, the working end of the cylinder 302 is shortened, and the upper mold 4 and the lower mold 401 are separated.

[0030] Working principle: According to the injection molding requirements, rotating the handle 505 drives the threaded rod 504 to rotate. The threaded rod 504 engages with the internal threaded hole of the limiting plate 502, causing the limiting plate 502 to slide in the slide groove 501, changing its position in the injection tube 5. The change in the position of the limiting plate 502 adjusts the flow area of ​​the raw material in the injection tube 5. Pushing the limiting plate 502 into the injection tube 5 reduces the flow area and decreases the raw material flow rate, and vice versa. This allows for flexible adaptation to different raw material characteristics and injection molding requirements, reducing injection molding defects. An annular sealing groove is set on the circumferential surface where the limiting plate 502 contacts the inner wall of the injection tube 5, and an O-ring silicone seal is embedded in it. The seal is made of high-temperature resistant and chemically corrosion resistant fluororubber, which forms an interference fit with the inner wall of the injection tube 5. When the limiting plate 502 moves to adjust the flow rate, the seal always maintains elastic compression to prevent the molten raw material from leaking from the gap between the two.

[0031] The operator starts the cylinder 302 through the control panel 6. The working end of the cylinder 302 pushes the movable plate 303 to move downward along the support column 3. The movable plate 303 drives the upper mold 4 at the bottom to move downward synchronously until it closes with the lower mold 401 on the top side of the worktable 1. The support column 3 guides and limits the movable plate 303 to ensure that the upper mold 4 and the lower mold 401 are accurately aligned, improve the accuracy and stability of mold closing, and reduce the defect rate caused by mold closing deviation.

[0032] After the mold closing operation is completed, the molten raw material flows into the mold cavity 402 through the injection pipe 5 to realize the injection molding operation. After the water tank is cooled after molding, the working end of the cylinder 302 is shortened, and the upper mold 4 and the lower mold 401 are separated.

[0033] During the injection molding process, the drive motor 211 is started via the control panel 6, which drives one of the rotating shafts 206 and the drive wheel 208 to rotate. The drive wheel 208 drives the other rotating shaft 206 and the driven wheel 209 to rotate via the belt 210, which in turn drives the cam 207 to rotate simultaneously. When the protruding part of the cam 207 contacts the connecting plate 203, it pushes the connecting plate 203 to compress the compression spring 204, which drives the movable rod 201 and the tamping ball 202 to move closer to the lower mold 401. The cam 207 continues to rotate, the protruding part leaves the connecting plate 203, the compression spring 204 returns to its original position, and pulls the connecting plate 203 and the tamping ball 202 back. This cycle continues, and the tamping ball 202 continuously strikes both sides of the lower mold 401, causing the molten material in the mold cavity 402 to vibrate, accelerating the discharge of air bubbles, promoting the uniform filling of the mold cavity 402 by the material, and improving the structural density and performance of the water tank after molding.

[0034] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An injection molding device for a water tank in an electric iron, characterized in that: The workbench (1) includes a worktable (1) with two symmetrically mounted support plates (2) on its top side. Three movable rods (201) are equidistantly mounted inside each support plate (2). One end of each movable rod (201) is fitted with a percussion ball (202), and the other end of each movable rod (201) is fitted with a connecting plate (203). Three compression springs (204) are equidistantly fixed between the connecting plate (203) and the support plate (2). The compression springs (204) are respectively sleeved on the outside of the movable rods (201). A groove (205) is provided inside the bottom side of the workbench (1). Two rotating shafts (206) are symmetrically mounted in the through groove (205) on the top side of the worktable (1). A cam (207) is mounted on the top of the rotating shaft (206). The cam (207) will contact the connecting plate (203) during operation. A drive wheel (208) and a driven wheel (209) are respectively mounted on the bottom of the rotating shaft (206). The drive wheel (208) and the driven wheel (209) are connected by a belt (210). A drive motor (211) is installed on the inner wall of the bottom side of the groove (205). One end of the rotating shaft (206) is connected to the output end of the drive motor (211).

2. The injection molding device for an electric iron water tank according to claim 1, characterized in that: Support columns (3) are installed at the four corners of the top side of the workbench (1). A fixed plate (301) is installed on the top side of the support column (3). A cylinder (302) is installed on the top side of the fixed plate (301). A movable plate (303) is installed on the working end of the cylinder (302). The four corners of the movable plate (303) are slidably installed on the outside of the support column (3).

3. The injection molding device for an electric iron water tank according to claim 2, characterized in that: The upper mold (4) is installed on the bottom side of the movable plate (303), and the lower mold (401) is installed on the top side of the workbench (1). The lower mold (401) has a mold cavity (402) that matches the upper mold (4) inside. When the tamping ball (202) moves, it will contact the outside of the lower mold (401).

4. The injection molding device for an electric iron water tank according to claim 3, characterized in that: The upper mold (4) is internally connected to an injection tube (5), one end of which is connected to an external molten raw material source.

5. The injection molding device for an electric iron water tank according to claim 4, characterized in that: The movable plate (303) has a groove (501) inside its top side. A limiting plate (502) is slidably installed inside the groove (501). One end of the limiting plate (502) is slidably installed inside the injection tube (5). A screw hole is opened inside the bottom end of the limiting plate (502). Two mounting plates (503) are symmetrically installed on the top side of the movable plate (303). A threaded rod (504) is movably installed between the mounting plates (503) through a screw hole. A handle (505) is installed at one end of the threaded rod (504).

6. The injection molding device for an electric iron water tank according to claim 5, characterized in that: A control panel (6) is installed on one side of the workbench (1). The control panel (6) is electrically connected to the electrical components inside the device and is used to control the operation of the electrical components inside the device.

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