Printer housing injection mold

Abstract

The application discloses a printer shell injection mold and relates to the field of injection molds, which comprises a workbench, a lower mold fixedly connected to the upper surface of the workbench, an upper mold arranged above the lower mold, a lifting assembly arranged on the workbench and used for driving the upper mold to move, and an ejection assembly arranged on the workbench and used for pushing out an injection workpiece. The injection mold is provided with a containing groove, an ejection plate and a spring. In use, the upper mold is driven by the lifting assembly to move close to the lower mold, the pressing assembly is used to drive the moving plate to move downward, and the ejection plate is moved into the containing groove. After the injection workpiece is formed and cooled, the upper mold is driven to move away from the lower mold, the spring is caused to move upward under the rebound of the spring, the ejection plate is moved out of the containing groove, and the injection workpiece is ejected. The injection mold can avoid the problem that the work efficiency is reduced due to the fact that the motor is started to drive the push plate to push the workpiece upward so that the workpiece is demolded.

Description

Technical Field

[0001] This application relates to the field of injection molds, and in particular to injection molds for printer housings. Background Technology

[0002] Injection molds are tools used for plastic injection molding. By injecting molten plastic into the mold cavity and cooling and solidifying it, complex-shaped and precisely sized plastic products can be mass-produced. Injection molds directly determine the shape, dimensional accuracy, surface quality and production efficiency of the products, supporting hundreds of thousands to millions of injection cycles. They are key equipment for the mass production of plastic products.

[0003] The utility model patent with announcement number CN212072756U proposes a printer injection molded part, including a worktable. A support frame is fixedly installed on the upper wall of the worktable. A pair of hydraulic cylinders with the same structure are fixedly installed on the lower wall of the support frame. An upper template is fixedly installed on the driving end of the pair of hydraulic cylinders, and an injection hole is opened in the center of the template. Two pairs of conduits with the same structure are fixedly installed on the lower wall of the upper template. A heat dissipation structure and a demolding structure are installed on the upper wall of the worktable.

[0004] One of the aforementioned printer injection molding parts cannot automatically push the workpiece out of the lower mold when the upper mold is opened. It requires starting a motor to drive a push plate to push the workpiece upward to demold it, which reduces work efficiency. Utility Model Content

[0005] To address the aforementioned issues, this application provides an injection mold for a printer housing.

[0006] The printer housing injection mold provided in this application adopts the following technical solution:

[0007] A printer housing injection mold includes a worktable, a lower mold fixedly connected to the upper surface of the worktable, an upper mold above the lower mold, a lifting assembly for moving the upper mold, and an ejection assembly for pushing out the injection molded workpiece. The ejection assembly includes a receiving groove formed in the bottom wall of the lower mold cavity, an ejection plate adapted to the receiving groove within the lower mold cavity, a cavity formed below the lower mold cavity inside the lower mold, a movable plate within the cavity, multiple springs fixedly connected to the lower surface of the movable plate, the bottom ends of the springs fixedly connected to the bottom wall of the cavity, a connecting rod fixedly connected to the lower surface of the ejection plate, the bottom end of the connecting rod penetrating the bottom wall of the receiving groove and fixedly connected to the movable plate, and a pressing assembly for pushing the movable plate on the upper mold.

[0008] By adopting the above technical solution, during use, the lifting component moves the upper mold closer to the lower mold, so that the upper mold and the lower mold are in contact. At the same time, the pressing component presses down the moving plate, causing the spring to contract and moving the ejector plate into the receiving groove. This prevents the ejector plate from being located in the mold cavity of the lower mold, which would affect the molding of the injection molded part. After the injection molded part has cooled, by moving the upper mold away from the lower mold and the pressing component away from the moving plate, the spring rebounds and pushes the moving plate up, moving the ejector plate out of the receiving groove and ejecting the injection molded part. This minimizes the need to start a motor to drive the push plate to push the workpiece upward for demolding, which would reduce work efficiency.

[0009] Preferably, the lifting assembly includes two hydraulic cylinders fixedly connected to the lower surface of the top of the workbench, and the output ends of the hydraulic cylinders are fixedly connected to the upper mold.

[0010] By adopting the above technical solution, the upper mold is raised and lowered by starting the hydraulic cylinder, so that the upper mold and the lower mold are in contact. Then, the material is injected through the injection hole on the upper mold to perform injection molding of the workpiece.

[0011] Preferably, the pressing assembly includes push rods fixedly connected to both ends of the lower surface of the upper mold, and through holes adapted to the push rods are opened at both ends of the upper surface of the lower mold. One end of the push rod passes through the through hole and is located above the moving plate.

[0012] By adopting the above technical solution, when the upper mold is close to the lower mold, the bottom end of the push rod passes through the through hole and abuts against the moving plate. When the upper mold and the lower mold are in contact, the push rod presses down on the moving plate, compresses the spring, and moves the ejector plate into the receiving groove. When the upper mold is away from the lower mold, it drives the push rod to move up. Through the spring rebound, the ejector plate is pushed upward, realizing automatic demolding.

[0013] Preferably, positioning blocks for limiting the descent distance of the upper mold are fixedly connected to both ends of the upper surface of the lower mold.

[0014] By adopting the above technical solution, when the upper mold approaches the lower mold, the positioning block can limit the distance between the upper mold and the lower mold, so that the upper mold fits with the positioning block, and the push rod pushes the moving plate to move the ejector plate into the receiving groove. This prevents the push rod from pressing down on the moving plate. If the ejector plate is moved into the receiving groove and the push rod continues to press down on the moving plate, it will damage the moving plate. Alternatively, if the upper mold descends too little, it will be unable to move the ejector plate into the receiving groove, which will affect the injection molding of the workpiece.

[0015] Preferably, each spring is provided with a positioning rod, and the upper surface of the worktable is provided with multiple sliding holes below the lower mold. The top end of the positioning rod is fixedly connected to the moving plate, and the bottom end of the positioning rod penetrates the bottom wall of the cavity and is slidably disposed in the sliding hole.

[0016] By adopting the above technical solution, the stability of the spring and the moving plate can be improved by using the positioning rod, preventing the spring from bending when it contracts and affecting its service life.

[0017] Preferably, a cooling water pipe is coiled inside the upper mold, with both ends of the cooling water pipe penetrating the upper mold and located above the upper mold.

[0018] By adopting the above technical solution, the cooling water pipe is connected to the external water supply component at both ends, so that the cooling water circulates in the cooling water pipe and cools the upper mold, which facilitates the rapid molding of the injection molded workpiece.

[0019] Preferably, the bottom end of the push rod is provided with an insertion hole, and the two ends of the upper surface of the movable plate are fixedly connected with insertion rods, which are respectively inserted into the insertion hole.

[0020] By adopting the above technical solution, when the push rod pushes the moving plate, the insert rods are inserted into the insertion holes respectively, and the push rod and the moving plate are pre-connected. When the upper mold rises and pulls the push rod, the push rod lifts the moving plate upward through the insert rods and insertion holes, thereby improving the ejection effect of the ejector plate.

[0021] Preferably, two limiting blocks for limiting the rising height of the moving plate are fixedly connected to the upper surface of the moving plate.

[0022] By adopting the above technical solution, the limiting block can prevent the push rod from being unable to disengage from the insertion hole when it pulls the moving plate upward through the insertion rod and insertion hole, which would cause the moving plate to rise too high, stretch the spring too much, and damage the spring.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. This application utilizes the cooperative arrangement of structures such as a receiving groove, an ejector plate, and a spring. During use, the lifting assembly moves the upper mold closer to the lower mold, bringing them into contact. Simultaneously, the pressing assembly presses down on the moving plate, causing the spring to contract and moving the ejector plate into the receiving groove. This prevents the ejector plate from being located inside the lower mold cavity, which would affect the molding of the injection molded part. After the injection molded part has cooled, by moving the upper mold away from the lower mold and the pressing assembly away from the moving plate, the spring's rebound pushes the moving plate upward, moving the ejector plate out of the receiving groove and ejecting the injection molded part. This minimizes the need to start a motor to drive a pusher plate to push the workpiece upward for demolding, which reduces work efficiency.

[0025] 2. By connecting both ends of the cooling water pipe to the external water supply assembly, the cooling water circulates within the cooling water pipe, allowing the cooling water to cool the upper mold and facilitate rapid cooling and molding of the injection molded workpiece. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the printer housing injection mold according to an embodiment of this application;

[0027] Figure 2 The embodiments of this application mainly embody Figure 1 A schematic diagram of the enlarged structure of region A in the middle;

[0028] Figure 3 The embodiments of this application mainly embody Figure 1 A schematic diagram of the enlarged structure of region B in the middle;

[0029] Figure 4 This is an exploded view of the connection structure between the upper mold and the cooling water pipe, which is the main embodiment of this application.

[0030] Reference numerals: 1. Workbench; 2. Lower mold; 3. Upper mold; 4. Receiving groove; 5. Ejector plate; 6. Cavity; 7. Moving plate; 8. Spring; 9. Connecting rod; 10. Hydraulic cylinder; 11. Push rod; 12. Through hole; 13. Positioning block; 14. Positioning rod; 15. Sliding hole; 16. Cooling water pipe; 17. Insertion hole; 18. Insertion rod; 19. Limiting block. Detailed Implementation

[0031] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0032] This application discloses an injection mold for a printer housing.

[0033] Reference Figure 1 , Figure 2 and Figure 3 A printer housing injection mold includes a worktable 1, a lower mold 2 fixedly connected to the upper surface of the worktable 1, a mold cavity opened on the upper surface of the lower mold 2, an upper mold 3 above the lower mold 2, an injection hole opened at the top of the upper mold 3, a lifting assembly for moving the upper mold 3 and an ejection assembly for pushing out the injection molded workpiece on the worktable 1, the ejection assembly includes a receiving groove 4, an ejection plate 5, a cavity 6, a moving plate 7, a spring 8 and a connecting rod 9;

[0034] The receiving groove 4 is opened in the bottom wall of the cavity of the lower mold 2. The ejector plate 5 is set in the cavity of the lower mold 2 and is adapted to the receiving groove 4. The cavity 6 is opened in the interior of the lower mold 2 and is located below the cavity. The moving plate 7 is set in the cavity 6. Multiple springs 8 are provided, all of which are fixedly connected to the lower surface of the moving plate 7. The bottom end of the spring 8 is fixedly connected to the bottom wall of the cavity 6. The connecting rod 9 is fixedly connected to the lower surface of the ejector plate 5. The bottom end of the connecting rod 9 passes through the bottom wall of the receiving groove 4 and is fixedly connected to the moving plate 7. The upper mold 3 is provided with a pressing component for pushing the moving plate 7.

[0035] Reference Figure 1 The lifting assembly includes two hydraulic cylinders 10 fixedly connected to the lower surface of the top of the workbench 1. The output ends of the hydraulic cylinders 10 are fixedly connected to the upper mold 3. By starting the hydraulic cylinders 10, the upper mold 3 is driven to lift and lower, so that the upper mold 3 is in contact with the lower mold 2. Then, the material is injected through the injection hole on the upper mold 3 to perform injection molding of the workpiece.

[0036] Reference Figure 1 and Figure 3 The pressing assembly includes push rods 11 fixedly connected to both ends of the lower surface of the upper mold 3. The upper surface of the lower mold 2 has through holes 12 at both ends that are adapted to the push rods 11. One end of the push rod 11 passes through the through hole 12 and is located above the moving plate 7. When the upper mold 3 approaches the lower mold 2, the bottom end of the push rod 11 passes through the through hole 12 and abuts against the moving plate 7. When the upper mold 3 and the lower mold 2 are in contact, the push rod 11 presses down on the moving plate 7, compresses the spring 8, and moves the ejector plate 5 into the receiving groove 4. When the upper mold 3 moves away from the lower mold 2, it drives the push rod 11 to move upward. Through the spring 8 rebound, the ejector plate 5 is pushed upward to achieve automatic demolding.

[0037] Reference Figure 1 The upper surface of the lower mold 2 is fixedly connected to two ends of a positioning block 13 for limiting the descent distance of the upper mold 3. When the upper mold 3 approaches the lower mold 2, the positioning block 13 can limit the distance between the upper mold 3 and the lower mold 2, so that the upper mold 3 and the positioning block 13 are in contact. At the same time, the push rod 11 pushes the moving plate 7, just enough to move the ejector plate 5 into the receiving groove 4. This prevents the push rod 11 from pressing down on the moving plate 7. If the ejector plate 5 is moved into the receiving groove 4 and the push rod 11 continues to press down on the moving plate 7, it will damage the moving plate 7. Or the descent distance of the upper mold 3 is too small, so that the ejector plate 5 cannot be moved into the receiving groove 4, which will affect the injection molding of the workpiece.

[0038] Reference Figure 1 and Figure 2Each spring 8 is equipped with a positioning rod 14. Multiple sliding holes 15 are opened on the upper surface of the worktable 1 below the lower mold 2. The top end of the positioning rod 14 is fixedly connected to the moving plate 7, and the bottom end of the positioning rod 14 penetrates the bottom wall of the cavity 6 and is slidably set in the sliding hole 15. The positioning rod 14 can improve the stability of the spring 8 and the moving plate 7 and prevent the spring 8 from bending when it contracts, thus affecting the service life of the spring 8.

[0039] Reference Figure 1 and Figure 4 The upper mold 3 has a cooling water pipe 16 coiled inside. Both ends of the cooling water pipe 16 pass through the upper mold 3 and are located above the upper mold 3. By connecting both ends of the cooling water pipe 16 to the external water supply component, the cooling water circulates in the cooling water pipe 16, which cools the upper mold 3 and facilitates the rapid molding of the injection molded part.

[0040] Reference Figure 3 The bottom end of the push rod 11 is provided with an insertion hole 17. The two ends of the upper surface of the movable plate 7 are fixedly connected with insertion rods 18. The insertion rods 18 are respectively inserted into the insertion holes 17. When the push rod 11 pushes the movable plate 7, the insertion rods 18 are respectively inserted into the insertion holes 17, and the push rod 11 is pre-connected to the movable plate 7. When the upper mold 3 rises and pulls the push rod 11, the push rod 11 lifts the movable plate 7 upward through the insertion rods 18 and the insertion holes 17, thereby improving the ejection effect of the ejector plate 5.

[0041] Reference Figure 1 Two limiting blocks 19 are fixedly connected to the upper surface of the movable plate 7 to limit the rising height of the movable plate 7. The limiting blocks 19 can prevent the push rod 11 from pulling the movable plate 7 up through the insertion rod 18 and the insertion hole 17, so that the insertion rod 18 is difficult to disengage from the insertion hole 17, which would cause the movable plate 7 to rise too high, stretch the spring 8 too much, and cause the spring 8 to be damaged.

[0042] The implementation principle of the printer housing injection mold in this embodiment is as follows: During use, the hydraulic cylinder 10 is activated to drive the upper mold 3 to rise and fall, so that the upper mold 3 is in contact with the lower mold 2. Then, material is injected through the injection hole on the upper mold 3 to perform injection molding of the workpiece. At the same time, when the upper mold 3 is close to the lower mold 2, the bottom end of the push rod 11 passes through the through hole 12 and abuts against the moving plate 7. When the upper mold 3 is in contact with the lower mold 2, the push rod 11 presses down on the moving plate 7, compressing the spring 8 and moving the ejector plate 5 into the receiving groove 4 to prevent the ejector plate 7 from being located in the mold cavity of the lower mold 2. The cooling water pipe 16 affects the molding of the injection molded part. By connecting both ends of the cooling water pipe 16 to the external water supply component, the cooling water circulates in the cooling water pipe 16, which cools the upper mold 3, facilitating the rapid molding of the injection molded part. Then, the hydraulic cylinder 10 is activated to move the upper mold 3 away from the lower mold 2, driving the push rod 11 to move upward. The spring 8 rebounds, causing the spring 8 to push the moving plate 7 upward, moving the ejector plate 5 out of the receiving groove 4, and ejecting the injection molded part. This avoids the problem of needing to start the motor to drive the push plate to push the part upward for demolding, which would reduce work efficiency.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A printer housing injection mold, comprising a worktable (1), wherein a lower mold (2) is fixedly connected to the upper surface of the worktable (1), and an upper mold (3) is provided above the lower mold (2); the worktable (1) is provided with a lifting assembly for moving the upper mold (3) and an ejector assembly for pushing out the injection molded workpiece, characterized in that: The ejection assembly includes a receiving groove (4) formed in the bottom wall of the cavity of the lower mold (2). The cavity of the lower mold (2) is provided with an ejection plate (5) that is adapted to the receiving groove (4). The lower mold (2) has a cavity (6) located below the cavity. A movable plate (7) is provided in the cavity (6). A plurality of springs (8) are fixedly connected to the lower surface of the movable plate (7). The bottom end of the springs (8) is fixedly connected to the bottom wall of the cavity (6). A connecting rod (9) is fixedly connected to the lower surface of the ejection plate (5). The bottom end of the connecting rod (9) passes through the bottom wall of the receiving groove (4) and is fixedly connected to the movable plate (7). The upper mold (3) is provided with a pressing assembly for pushing the movable plate (7).

2. The printer housing injection mold according to claim 1, characterized in that: The lifting assembly includes two hydraulic cylinders (10) fixedly connected to the lower surface of the top of the workbench (1), and the output ends of the hydraulic cylinders (10) are fixedly connected to the upper mold (3).

3. The printer housing injection mold according to claim 2, characterized in that: The pressing assembly includes push rods (11) fixedly connected to both ends of the lower surface of the upper mold (3). The upper surface of the lower mold (2) has through holes (12) adapted to the push rods (11) at both ends. One end of the push rod (11) passes through the through hole (12) and is located above the moving plate (7).

4. The printer housing injection mold according to claim 3, characterized in that: The lower mold (2) has positioning blocks (13) fixedly connected to both ends of its upper surface to limit the descent distance of the upper mold (3).

5. The printer housing injection mold according to claim 4, characterized in that: Each spring (8) is provided with a positioning rod (14). The upper surface of the workbench (1) is provided with multiple sliding holes (15) located below the lower mold (2). The top end of the positioning rod (14) is fixedly connected to the moving plate (7). The bottom end of the positioning rod (14) penetrates the bottom wall of the cavity (6) and is slidably disposed in the sliding hole (15).

6. The printer housing injection mold according to claim 5, characterized in that: The upper mold (3) has a cooling water pipe (16) coiled inside, and both ends of the cooling water pipe (16) pass through the upper mold (3) and are located above the upper mold (3).

7. The printer housing injection mold according to claim 6, characterized in that: The bottom end of the push rod (11) is provided with a socket (17), and the two ends of the upper surface of the moving plate (7) are fixedly connected with plug rods (18), and the plug rods (18) are respectively inserted into the socket (17).

8. The printer housing injection mold according to claim 7, characterized in that: Two limiting blocks (19) are fixedly connected to the upper surface of the movable plate (7) to limit the rising height of the movable plate (7).

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