Injection molding device with positioning function for plastic mold

Abstract

The utility model relates to the technical field of plastic injection moulding, disclose a kind of injection molding device for plastic mould with positioning function, including main component, including workbench, the workbench is fixed with slide bar, the slide bar is fixed with top plate, the slide bar is slidably provided with moving plate, the moving plate is fixed with injection mechanism, and the injection mechanism includes injection head and feed cylinder;Shielding component is located in the injection head side, including shielding piece.The utility model has the beneficial effect that: by setting the shielding plate that can move with the injection head synchronously, after the injection head completes injection and rises to set distance, shielding plate is automatically triggered and shields injection head bottom opening, and with the injection head rises synchronous movement, the path of molten raw material due to gravity overflow is blocked throughout, reduce raw material waste, reduce production cost, the opening and closing of shielding plate are automatically triggered by the lifting position of injection head, and the opening height is adjustable simultaneously, to adapt to injection mould of different height.

Description

Technical Field

[0001] This utility model relates to the field of plastic injection molding technology, and in particular to an injection molding device for plastic molds with positioning function. Background Technology

[0002] Small vertical injection molding machines are widely used in the production of small batches and various types of plastic parts due to their compact structure and convenient operation. After the injection head heats and melts the raw material, it moves downward to the top of the mold cavity and injects the molten material into the mold through pressure. After the injection is completed, the injection head returns to its original position and waits for the next injection cycle. When the injection head completes the injection and returns to its original position, the molten material remaining inside it is prone to overflow from the bottom opening of the injection head due to gravity, resulting in material waste. If too much material accumulates, it may also fall onto the bottom worktable, which needs to be cleaned in time. Utility Model Content

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0004] In view of the problems existing in the above and / or existing injection molding devices for plastic molds with positioning functions, this utility model is proposed.

[0005] Therefore, the problem to be solved by this utility model is that when the injection head of a small vertical injection molding machine completes injection and rises to reset, the molten material overflows due to gravity, resulting in waste.

[0006] To solve the above technical problems, this utility model provides the following technical solution: an injection molding device for a plastic mold with positioning function, comprising a main body component including a worktable, a slide rod fixed on the worktable, a top plate fixed on the slide rod, a movable plate slidably disposed on the slide rod, an injection molding mechanism fixed on the movable plate, and the injection molding mechanism including an injection head and a feed cylinder; A shielding assembly, located on one side of the injection head, includes a shielding component. The shielding component includes a shielding plate located at the bottom of the injection head. A connecting plate is fixed to one side of the shielding plate. A rotating ring is fixed to the connecting plate. A rotating column is fixed to the rotating ring. A support block is connected to the upper end of the rotating column by a bearing. The support block is fixed to the injection head.

[0007] As a preferred embodiment of the injection molding device for plastic molds with positioning function described in this utility model, a boss is fixed on the rotating column, a torsion spring is fixed on the boss, and the other end of the torsion spring is fixed on the support block.

[0008] As a preferred embodiment of the injection molding device for plastic molds with positioning function described in this utility model, a limiting plate is fixed on the support block, and a mating block is fixed on the boss.

[0009] As a preferred embodiment of the injection molding device for plastic molds with positioning function described in this utility model, a silicone pad is fixed to the top of the baffle plate.

[0010] As a preferred embodiment of the injection molding device for plastic molds with positioning function described in this utility model, the blocking component further includes a trigger element located on the worktable. The trigger element includes a fixed column located below the rotating column. A sliding groove is provided in the rotating column, and the fixed column can slide in the sliding groove.

[0011] As a preferred embodiment of the injection molding device for plastic molds with positioning function described in this utility model, the fixed column is provided with a spiral groove, and a slider is fixed on the inner wall of the groove, and the slider can slide in the spiral groove.

[0012] As a preferred embodiment of the injection molding device for plastic molds with positioning function described in this utility model, wherein: a lifting block is fixed at the bottom of the fixed column, a fixed sleeve is fixed on the worktable, and the lifting block slides within the fixed sleeve.

[0013] As a preferred embodiment of the injection molding device for plastic molds with positioning function described in this utility model, the fixing sleeve is provided with a threaded groove and a bolt is connected to the internal thread.

[0014] As a preferred embodiment of the injection molding device for plastic molds with positioning function described in this utility model, a positioning hole is provided on the worktable.

[0015] As a preferred embodiment of the injection molding device for plastic molds with positioning function described in this utility model, a control mechanism and a lifting mechanism are fixed on the top plate.

[0016] The beneficial effects of this utility model are as follows: By setting a baffle that can move synchronously with the injection head, after the injection head completes injection and rises to a set distance, the baffle is automatically triggered and blocks the bottom opening of the injection head, and moves synchronously with the injection head as it rises, thus blocking the path of molten material overflowing due to gravity throughout the process, reducing material waste and lowering production costs. The opening and closing of the baffle is automatically triggered by the lifting position of the injection head, and the opening height is adjustable to adapt to injection molds of different heights. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments 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. Among them: Figure 1 This is an overall structural diagram of an injection molding device for plastic molds with positioning function.

[0018] Figure 2 This is a structural diagram of the worktable for an injection molding device with positioning function for plastic molds.

[0019] Figure 3 Injection molding device for plastic molds with positioning function Figure 3 Enlarged view of the structure at point A in the middle.

[0020] Figure 4 A structural diagram of the rotating column of an injection molding device for plastic molds with positioning function.

[0021] Figure 5 A bottom view of the injection head of an injection molding device for plastic molds with positioning function.

[0022] Figure 6 Injection molding device for plastic molds with positioning function Figure 5 Enlarged view of the structure at point B in the middle.

[0023] Figure 7 A cross-sectional view of the fixing sleeve of an injection molding device for plastic molds with positioning function. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0027] Example 1 Reference Figures 1-4 This is the first embodiment of the present invention. This embodiment provides an injection molding device for plastic molds with positioning function. The injection molding device for plastic molds with positioning function includes a main body component 1, including a worktable 11. A slide rod 12 is fixed on the worktable 11, and a top plate 13 is fixed on the slide rod 12. A movable plate 14 is slidably disposed on the slide rod 12. There are two slide rods 12 to ensure that the movable plate 14 can move vertically and position the movable plate 14. An injection molding mechanism 15 is fixed on the movable plate 14. The injection molding mechanism 15 includes an injection head 151 and a feed cylinder 152. Granular plastic raw materials are fed through the feed cylinder. The cylinder 152 enters the injection head 151. The heating coil inside the injection head 151 heats the raw material, melting it into a fluid state. At the same time, the internal injection screw rotates and pre-plasticizes the material, pushing the molten material to the nozzle of the injection head 151 for later use. Then, the mold is placed on the worktable 11, and the injection head 151 descends to a position that fits against the mold. The injection screw advances forward, injecting the internal molten material into the closed mold cavity through the nozzle at a set pressure and speed until the cavity is filled with molten material, thus completing the injection molding. This is existing technology, and this solution will not be described in detail. Moreover, those skilled in the art can clearly understand the working principle.

[0028] The shielding component 2 is located on one side of the injection head 151 and includes a shielding member 21. The shielding member 21 can shield the nozzle of the injection head 151 to prevent the molten material inside from overflowing from the nozzle under the action of gravity, thus avoiding waste.

[0029] The shielding component 21 includes a shielding plate 211 located at the bottom of the injection head 151. A connecting plate 212 is fixed to one side of the shielding plate 211. A rotating ring 213 is fixed on the connecting plate 212. A rotating column 214 is fixed on the rotating ring 213. A support block 215 is connected to the upper end of the rotating column 214 by a bearing. The support block 215 is fixed on the injection head 151.

[0030] When the rotating column 214 rotates relative to the support block 215, it will drive the rotating ring 213 and the connecting plate 212 to rotate simultaneously, and eventually drive the baffle plate 211 to rotate. When the baffle plate 211 rotates to the position where it coincides with the bottom nozzle of the injection head 151, the nozzle will be blocked, thereby preventing the molten material from overflowing from the nozzle under the action of gravity.

[0031] Example 2 Reference Figures 2-6 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0032] Specifically, a boss 216 is fixed on the rotating column 214, and a torsion spring 217 is fixed on the boss 216. The other end of the torsion spring 217 is fixed on the support block 215. The torsion spring 217 is designed to ensure that the baffle plate 211 always tends to fit against the bottom nozzle of the injection head 151.

[0033] Specifically, a limiting plate 218 is fixed on the support block 215, and a mating block 219 is fixed on the boss 216. The mating of the limiting plate 218 and the mating block 219 can limit the rotation limit position of the rotating column 214. The mating block 219 contacts the limiting plate 218, preventing the rotating column 214 from continuing to rotate, but it will not prevent the rotating column 214 from rotating in the opposite direction, that is, it will not prevent the opening of the baffle plate 211. Without other external forces, the torsion spring 217 can keep the rotating column 214 at a certain angle. At this time, the baffle plate 211 and the nozzle of the injection head 151 are in contact with each other, thereby preventing the internal molten material from moving downward and overflowing from the nozzle.

[0034] Specifically, a silicone pad 2110 is fixed to the top of the shield 211. The silicone pad 2110 has good high temperature resistance and good elastic deformation ability. Even if there is material adhering to the silicone pad 2110 when shielding, it will not form a stable adhesive force on the silicone pad 2110 after the molten material solidifies. It can be easily removed after cooling.

[0035] Specifically, the shielding component 2 also includes a trigger 22 located on the worktable 11. The trigger 22 is configured to automatically open the shield 211 when the injection head 151 moves downward to perform injection molding, at a specified height before the injection head 151 contacts the mold, so as to avoid obstructing the normal injection molding process. At the same time, after the injection molding is completed, when the injection head 151 moves upward and moves away from the mold to a certain height, it can automatically trigger the shield 211 to re-fit with the nozzle at the bottom of the injection head 151 for physical shielding.

[0036] The trigger 22 includes a fixed post 221 located below the rotating post 214. The rotating post 214 has a sliding groove 214-1. The fixed post 221 can slide in the sliding groove 214-1. As the injection head 151 descends, the rotating post 214 will descend synchronously, so that it is sleeved on the outside of the fixed post 221 from above. At this time, the fixed post 221 will slide in the sliding groove 214-1.

[0037] Example 3 Reference Figures 4-7 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0038] Specifically, a spiral groove 221-1 is provided on the fixed column 221, and a slider 222 is fixed on the inner wall of the sliding groove 214-1. The slider 222 can slide in the spiral groove 221-1. The spiral angle of the spiral groove 221-1 is greater than 90 degrees and the pitch is small.

[0039] When the rotating column 214 moves downward, the slider 222 enters the spiral groove 221-1 from the opening of the spiral groove 221-1 at the top of the fixed column 221. When the fixed column 221 slides inside the groove 214-1 of the rotating column 214, since the fixed column 221 cannot rotate, the rotating column 214 is driven to rotate under the cooperation of the slider 222 and the spiral groove 221-1, which in turn drives the baffle plate 211 to rotate synchronously, thereby exposing the bottom nozzle of the injection head 151 and moving the baffle plate 211 away from the vicinity of the nozzle, thus avoiding affecting subsequent injection operations.

[0040] The fixed column 221 is also provided with a straight groove 221-2, which is connected to the spiral groove 221-1. The straight groove 221-2 is provided so that when the baffle 211 is opened and the injection head 151 drives the rotating column 214 to continue to descend, the baffle 211 can remain open, thus preventing the baffle 211 from affecting the injection process.

[0041] When an injection is completed and the injection head 151 moves upward away from the mold, the rotating column 214 will also move upward relative to the fixed column 221, causing the rotating column 214 to rotate in the opposite direction. This will cause the rotating column 214 to reset, and the baffle plate 211 will also reset, blocking the nozzle of the injection head 151 again. After the rotating column 214 and the fixed column 221 separate, the baffle plate 211 will continue to block the nozzle of the injection head 151 under the action of the torsion spring 217, thereby preventing the molten material inside from overflowing from the nozzle under the action of gravity and causing waste.

[0042] Specifically, a lifting block 223 is fixed to the bottom of the fixed column 221, and a fixed sleeve 224 is fixed on the worktable 11. The lifting block 223 and the fixed sleeve 224 are rectangular. The lifting block 223 slides inside the fixed sleeve 224. By changing the relative position of the lifting block 223 inside the fixed sleeve 224, the height of the fixed column 221 relative to the worktable 11 can be changed, thereby changing the opening height of the baffle 211 to adapt to molds of different heights.

[0043] The lifting block 223 and the fixing sleeve 224 work together to prevent the fixing column 221 from rotating.

[0044] Specifically, the fixed sleeve 224 has a threaded groove, and a bolt is connected to the internal thread. There are two threaded grooves and two corresponding bolts. After ensuring the relative position of the lifting block 223 in the fixed sleeve 224, the bolt is threaded to the threaded groove and tightened to lock the position of the lifting block 223 in the fixed sleeve 224, thereby completing the installation of the fixed column 221.

[0045] Specifically, the worktable 11 has a positioning hole 11-1, which is concentric with the nozzle at the bottom of the injection head 151. A corresponding cylindrical block is fixed on the mold, and the size of the cylindrical block corresponds to the positioning hole 11-1. When placing the mold, simply place the cylindrical block on the mold into the positioning hole 11-1, and the two will engage, thus ensuring that the injection port of the mold is coaxial with the nozzle of the injection head 151, which is used to position the mold.

[0046] Specifically, a control mechanism 16 and a lifting mechanism 17 are fixed on the top plate 13. The control mechanism 16 is used to control the relevant parameters of injection molding, and the lifting mechanism 17 can drive the injection molding mechanism 15 to complete the lifting.

[0047] In initial use, the injection head 151 is positioned at the top. Under the action of the torsion spring 217, the rotating column 214 maintains a certain angle. At this time, the baffle plate 211 and the nozzle of the injection head 151 are in contact, preventing the molten material from moving downwards and overflowing from the nozzle. The mold is placed on the worktable 11, and injection begins. The injection head 151 moves downwards, and the rotating column 214 moves downwards synchronously. The rotating column 214 gradually approaches the fixed column 221, and then, from above, it fits over the fixed column 221. The fixed post 221 will slide in the groove 214-1. The slider 222 will enter the spiral groove 221-1 from the opening of the spiral groove 221-1 at the top of the fixed post 221. When the fixed post 221 slides inside the groove 214-1 of the rotating post 214, since the fixed post 221 cannot rotate, the rotating post 214 will be driven to rotate under the cooperation of the slider 222 and the spiral groove 221-1, which will drive the baffle plate 211 to rotate synchronously, thereby exposing the bottom nozzle of the injection head 151. The baffle plate 211 will be away from the nozzle, thus avoiding affecting the subsequent injection operation.

[0048] When an injection is completed and the injection head 151 moves upward away from the mold, the rotating column 214 will also move upward relative to the fixed column 221, causing the rotating column 214 to rotate in the opposite direction. This will cause the rotating column 214 to reset, and the baffle plate 211 will also reset, blocking the nozzle of the injection head 151 again. After the rotating column 214 and the fixed column 221 separate, the baffle plate 211 will continue to block the nozzle of the injection head 151 under the action of the torsion spring 217, thereby preventing the molten material inside from overflowing from the nozzle under the action of gravity and causing waste.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An injection molding device for a plastic mold with positioning function, characterized in that: include, The main component (1) includes a worktable (11), a slide rod (12) fixed on the worktable (11), a top plate (13) fixed on the slide rod (12), a movable plate (14) slidably arranged on the slide rod (12), and an injection molding mechanism (15) fixed on the movable plate (14). The injection molding mechanism (15) includes an injection head (151) and a feed cylinder (152). The shielding assembly (2), located on one side of the injection head (151), includes a shielding member (21). The shielding member (21) includes a shielding plate (211) located at the bottom of the injection head (151). A connecting plate (212) is fixed on one side of the shielding plate (211). A rotating ring (213) is fixed on the connecting plate (212). A rotating column (214) is fixed on the rotating ring (213). A support block (215) is connected to the upper end of the rotating column (214) by a bearing. The support block (215) is fixed on the injection head (151).

2. The injection molding device for plastic molds with positioning function as described in claim 1, characterized in that: A boss (216) is fixed on the rotating column (214), and a torsion spring (217) is fixed on the boss (216). The other end of the torsion spring (217) is fixed on the support block (215).

3. The injection molding device for plastic molds with positioning function as described in claim 2, characterized in that: A limiting plate (218) is fixed on the support block (215), and a mating block (219) is fixed on the boss (216).

4. The injection molding device for plastic molds with positioning function as described in claim 2 or 3, characterized in that: A silicone pad (2110) is fixed to the top of the shield (211).

5. The injection molding device for plastic molds with positioning function as described in claim 4, characterized in that: The shielding component (2) also includes a trigger (22) located on the worktable (11). The trigger (22) includes a fixed column (221) located below the rotating column (214). A sliding groove (214-1) is provided in the rotating column (214), and the fixed column (221) can slide in the sliding groove (214-1).

6. The injection molding device for a plastic mold with positioning function as described in claim 5, characterized in that: The fixed column (221) has a spiral groove (221-1), and a slider (222) is fixed on the inner wall of the sliding groove (214-1). The slider (222) can slide in the spiral groove (221-1).

7. The injection molding device for a plastic mold with positioning function as described in claim 5 or 6, characterized in that: The bottom of the fixed column (221) is fixed with a lifting block (223), and the workbench (11) is fixed with a fixed sleeve (224). The lifting block (223) slides inside the fixed sleeve (224).

8. The injection molding device for a plastic mold with positioning function as described in claim 7, characterized in that: The fixed sleeve (224) has a threaded groove and is internally threaded with a bolt.

9. The injection molding device for a plastic mold with positioning function as described in claim 8, characterized in that: The workbench (11) is provided with a positioning hole (11-1).

10. The injection molding device for a plastic mold with positioning function as described in claim 8 or 9, characterized in that: The top plate (13) is fixed with a control mechanism (16) and a lifting mechanism (17).

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