Small plastic gear injection mold

Abstract

The utility model relates to the technical field of injection molds, and discloses a small plastic gear injection mold, which comprises a lower mold and an upper mold arranged above the lower mold, the automatic spraying assembly comprises a mounting plate fixed to one side of the surface of the lower mold, an electric push rod fixedly mounted on the mounting plate through a bolt and a release agent tank arranged at the output end of the electric push rod, and a pressing plate is mounted at the pressing end of the release agent tank. According to the small plastic gear injection mold, through the automatic spraying assembly, when the lower mold is separated from the upper mold, a release agent can be automatically sprayed, so that manual spraying is not needed, the labor cost is reduced, the labor intensity of workers is reduced, and the production efficiency is improved; and the quality of the gear after injection molding demolding caused by forgetting of manual spraying is avoided, and the using effect of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a small plastic gear injection mold. Background Art

[0002] An injection mold is a tool used to produce plastic products; it is also a tool that gives plastic products a complete structure and precise dimensions. Injection molding is a processing method used for mass production of certain complex-shaped parts. Specifically, it refers to the process of injecting heated and molten plastic into the mold cavity under high pressure through an injection molding machine, and then cooling and solidifying it to obtain a molded product.

[0003] At present, in order to ensure that the finished product can be smoothly separated from the mold, prevent the finished product from sticking to the mold, ensure the surface of the finished product is smooth and tidy, and protect the mold from being damaged, so as to facilitate the repeated use of the mold, a release agent is needed. However, the mold function is relatively single and does not have the function of automatically spraying the release agent. The staff is also required to manually spray the surface of the mold cavity, which increases labor costs and production time. Moreover, manual spraying is prone to forgetting to spray, affecting the injection molding quality and reducing production efficiency. Therefore, we proposed a small plastic gear injection mold to solve the above problems. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the utility model provides a small plastic gear injection mold, which solves the problem that the mold has a relatively single function, does not have the function of automatically spraying a release agent, and requires staff to manually spray the mold cavity surface, thereby increasing labor costs and production time. Moreover, manual spraying can easily lead to forgetting to spray, affecting the injection molding quality and reducing production efficiency.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A small plastic gear injection mold, comprising a lower mold and an upper mold arranged above the lower mold, wherein an automatic spraying assembly is installed on the lower mold;

[0006] The automatic spraying assembly includes a mounting plate fixed to one side of the lower mold surface, an electric push rod fixed to the mounting plate by bolts, and a release agent tank arranged at the output end of the electric push rod;

[0007] A pressing plate is installed at the pressing end of the release agent tank, and symmetrically arranged L-shaped rods are fixed on the surface of the pressing plate. Two groups of the L-shaped rods slide on the mounting plate, and elastic ropes are provided between the L-shaped rods and the mounting plate.

[0008] Preferably, a sliding groove adapted to the L-shaped rod is provided on the surface of the mounting plate, and the L-shaped rod and the mounting plate are slidably connected via the sliding groove.

[0009] Preferably, a fixing block 1 is fixedly installed on the surface of the L-shaped rod, and a fixing block 2 corresponding to the fixing block 1 is fixed on the surface of the mounting plate. A through hole is provided inside the fixing block 2, and an extrusion bolt is threadedly connected to the surface of the fixing block 2 through the threaded hole. One end of the elastic rope is fixedly connected to the fixing block 1, and the other end of the elastic rope passes through the through hole of the fixing block 2. The elastic rope is squeezed and fixed by screwing the extrusion bolt.

[0010] Preferably, a U-shaped frame is fixed to the output end of the electric push rod, and a threaded rod is rotatably connected to the inside of the U-shaped frame through a bearing. The surface of the threaded rod is threadedly connected to symmetrically arranged extrusion plates, and the threads on the threaded rod are designed to be symmetrically opposite with the center. Two groups of extrusion plates are respectively threadedly connected to the opposite threads of the threaded rod, and the release agent tank is located between the two groups of extrusion plates. One end of the threaded rod passes through the U-shaped frame and extends to the outside of the U-shaped frame.

[0011] Preferably, a limiting block is fixed on one side of the extrusion plate, and a limiting groove adapted to the limiting block is provided on the surface of the U-shaped frame, and the limiting block and the U-shaped frame are slidably connected through the limiting groove.

[0012] Preferably, a V-shaped groove is provided on the side where the two groups of extrusion plates are close to each other.

[0013] Beneficial effects

[0014] The utility model provides a small plastic gear injection mold. Compared with the existing technology, it has the following advantages:

[0015] The small plastic gear injection mold can automatically spray a release agent when the lower mold and the upper mold are separated through an automatic spraying component, eliminating the need for manual spraying, thereby reducing labor costs, lowering the labor intensity of workers, and improving production efficiency. It also avoids the quality of the gear after injection molding and demolding caused by forgetting to spray manually, thereby improving the use effect of this device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the automatic spraying component of the utility model;

[0018] Figure 3 For this utility model Figure 2 A schematic diagram of the enlarged structure at point A;

[0019] Figure 4 For this utility model Figure 2 Schematic diagram of the enlarged structure at point B.

[0020] In the figure: 1. Lower mold; 2. Upper mold; 3. Automatic spray assembly; 301. Mounting plate; 302. Electric push rod; 303. U-shaped frame; 304. Extrusion plate; 305. Threaded rod; 306. Limit block; 307. Limit groove; 308. Release agent tank; 309. Pressing plate; 310. L-shaped rod; 311. Fixing block 1; 312. Elastic rope; 313. Fixing block 2; 314. Extrusion bolt. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] like Figure 1 As shown:

[0023] A small plastic gear injection mold comprises a lower mold 1 and an upper mold 2 arranged above the lower mold 1.

[0024] In this embodiment: In order to solve the technical problems existing in this prior art, as disclosed in the background technology above, "the design currently needs to use a release agent in order to ensure that the finished product can be smoothly separated from the mold, prevent the finished product from sticking to the mold, ensure that the surface of the finished product is smooth and tidy, and protect the mold from being damaged, so as to facilitate multiple uses of the mold. However, the mold function is relatively simple and does not have an automatic spray release agent. The staff is also required to manually spray the surface of the mold cavity, which increases labor costs and production time. In addition, manual spraying is prone to forgetting to spray, affecting the injection molding quality and reducing production efficiency." In terms of use, this problem is obviously a real problem that is difficult to solve. In view of this, in order to solve this technical problem, an automatic spraying component 3 is added to this application document.

[0025] More specifically:

[0026] like Figures 1-4 As shown:

[0027] An automatic spraying assembly 3 is installed on the lower mold 1. The automatic spraying assembly 3 includes a mounting plate 301 fixed to one side of the surface of the lower mold 1, an electric push rod 302 fixed to the mounting plate 301 by bolts, and a release agent tank 308 provided at the output end of the electric push rod 302.

[0028] A pressing plate 309 is mounted on the pressing end of the release agent tank 308. A symmetrically arranged pair of L-shaped rods 310 are fixed to the surface of the pressing plate 309. Two sets of L-shaped rods 310 slide on the mounting plate 301. An elastic rope 312 is provided between the L-shaped rods 310 and the mounting plate 301.

[0029] The surface of the mounting plate 301 is provided with a sliding groove adapted to the L-shaped rod 310, and the L-shaped rod 310 and the mounting plate 301 are slidably connected through the sliding groove;

[0030] A timing controller is mounted on the mounting plate 301 .

[0031] In this embodiment: the small plastic gear injection mold, when in use, is used to perform injection molding of the plastic gear through the lower mold 1 and the upper mold 2. When the upper mold 2 is separated from the lower mold 1, the plastic gear is ejected from the cavity of the lower mold 1 through the guide rod (not shown in the figure), and then the electric push rod 302 is connected to the external power supply, and the start of the electric push rod 302 is controlled by the timing controller (not shown in the figure), and the release agent tank 308 is driven to move. As the release agent tank 308 is pushed to move, the pressing end of the release agent tank 308 pushes the pressing plate 309 to move, and the two groups of L-shaped rods 310 are driven to slide on the mounting plate 301 through the pressing plate 309, and the elastic rope 312 is stretched at the same time. As the elastic rope 312 is continuously stretched, when the elastic rope 312 is pulled When extended to a certain extent, the rebound contraction force of the elastic rope 312 drives the L-shaped rod 310 and the pressing plate 309 to squeeze the pressing end of the release agent tank 308. At this time, the high-pressure gas inside the release agent tank 308 is released, and the discharged release agent is discharged to the cavity of the lower mold 1, thereby facilitating better injection molding work in the later stage. As the electric push rod 302 drives the release agent tank 308 to reset, and then under the elastic contraction of the elastic rope 312, it drives the pressing plate 309 and the L-shaped rod 310 to reset. Through this operation, when the lower mold 1 and the upper mold 2 are separated, the release agent can be automatically sprayed, so there is no need for manual spraying, thereby reducing labor costs, reducing the labor intensity of staff, improving production efficiency, and avoiding forgetting manual spraying to cause the quality of the gear after injection molding and demolding, thereby improving the use effect of this device.

[0032] It should be noted that the timing controller includes a programmable timer and a controller. A specific time interval is set by programming the timer, and a signal is sent to the controller according to the set time to start or stop the movement of the electric push rod 302. The electric push rod 302 and the timing controller are both provided by an external power supply.

[0033] Going further;

[0034] In an optional embodiment, a fixing block 1 311 is fixedly installed on the surface of the L-shaped rod 310, and a fixing block 2 313 corresponding to the fixing block 1 311 is fixed on the surface of the mounting plate 301. A through hole is provided inside the fixing block 2 313, and an extrusion bolt 314 is threadedly connected to the surface of the fixing block 2 313 through the threaded hole. One end of the elastic rope 312 is fixedly connected to the fixing block 1 311, and the other end of the elastic rope 312 passes through the through hole of the fixing block 2 313. The elastic rope 312 is squeezed and fixed by screwing the extrusion bolt 314.

[0035] In this embodiment: by rotating the extrusion bolt 314, the extrusion on the elastic rope 312 is released, and then the elastic rope 312 is pulled or loosened, so that the elastic force of the elastic rope 312 between the L-shaped rod 310 and the mounting plate 301 is different, and then the extrusion bolt 314 is rotated again to squeeze and fix the elastic rope 312. Through this operation, the spray port of the release agent tank 308 can be adjusted to correspond to the cavity of the lower mold 1. At this time, the pressing plate 309 is in a state of squeezing the release agent tank 308, so that the release agent sprayed from the release agent tank 308 is just sprayed on the cavity, further improving the use effect of the device.

[0036] Going further;

[0037] In an optional embodiment, a U-shaped frame 303 is fixed to the output end of the electric push rod 302. A threaded rod 305 is rotatably connected to the interior of the U-shaped frame 303 via a bearing. The surface of the threaded rod 305 is threadedly connected to symmetrically arranged extrusion plates 304. The threads on the threaded rod 305 are designed to be symmetrically opposite in structure with the center. Two sets of extrusion plates 304 are respectively threadedly connected to the opposite threads of the threaded rod 305. A release agent tank 308 is located between the two sets of extrusion plates 304. One end of the threaded rod 305 passes through the U-shaped frame 303 and extends to the outside of the U-shaped frame 303.

[0038] A limiting block 306 is fixed on one side of the extrusion plate 304 , and a limiting groove 307 adapted to the limiting block 306 is opened on the surface of the U-shaped frame 303 . The limiting block 306 and the U-shaped frame 303 are slidably connected through the limiting groove 307 .

[0039] In this embodiment, when replacing the release agent tank 308, the threaded rod 305 is rotated to drive the two sets of extrusion plates 304 to separate from each other, thereby releasing the extrusion of the release agent tank 308. The used release agent tank 308 is then taken out and replaced with a new release agent tank 308, which is placed between the two sets of extrusion plates 304. The threaded rod 305 is then rotated in the opposite direction to drive the two sets of extrusion plates 304 to move closer to each other, thereby squeezing and fixing the release agent tank 308.

[0040] As the extrusion plate 304 moves, the limiting block 306 is driven to slide in the limiting groove 307. Through the setting of the limiting block 306 and the limiting groove 307, the extrusion plate 304 can be limited, making the extrusion plate 304 more stable during movement.

[0041] It should be noted that the two sets of extrusion plates 304 can clamp two sets of release agent tanks 308. Under actual usage requirements, by clamping the two sets of release agent tanks 308, and the spray ports of the two sets of release agent tanks 308 are respectively set up upper and lower, it is possible to achieve simultaneous spraying of the core and the cavity.

[0042] Going further;

[0043] In an optional embodiment, a V-shaped groove is formed on the side where the two sets of extrusion plates 304 are close to each other.

[0044] In this embodiment, since the two sets of extrusion plates 304 are provided with V-shaped grooves on the sides close to each other, the contact area between the extrusion plates 304 and the release agent tank 308 is increased, thereby improving the fixing effect of the release agent tank 308.

[0045] The working principle and use process of the present invention are as follows: when using the small plastic gear injection mold, the plastic gear is injection molded by the lower mold 1 and the upper mold 2. When the upper mold 2 is separated from the lower mold 1, the plastic gear is ejected from the cavity of the lower mold 1 through the guide rod (not shown in the figure), and then the electric push rod 302 is connected to the external power supply. The start of the electric push rod 302 is controlled by the timing controller (not shown in the figure), and the release agent tank 308 is driven to move. As the release agent tank 308 is pushed, the pressing end of the release agent tank 308 pushes the pressing plate 309 to move, and the two sets of L-shaped rods 310 are driven to slide on the mounting plate 301 through the pressing plate 309, and the elastic rope 308 is pressed. 12 is stretched, and as the elastic rope 312 is continuously stretched, when the elastic rope 312 is stretched to a certain extent, the rebound contraction force of the elastic rope 312 drives the L-shaped rod 310 and the pressing plate 309 to squeeze the pressing end of the release agent tank 308. At this time, the high-pressure gas inside the release agent tank 308 is released, and the discharged release agent is discharged to the cavity of the lower mold 1, thereby facilitating better injection molding work in the later stage. As the electric push rod 302 drives the release agent tank 308 to reset, the elastic rope 312 elastically contracts, and then drives the pressing plate 309 and the L-shaped rod 310 to reset. Through this operation, when the lower mold 1 and the upper mold 2 are separated, the release agent can be automatically sprayed, so there is no need for manual spraying, thereby reducing labor costs and lowering The invention can reduce the labor intensity of the staff, improve production efficiency, avoid forgetting to spray manually and causing the quality of the gear after injection molding and demolding, and improve the use effect of the device. By rotating the extrusion bolt 314, the extrusion of the elastic rope 312 is released, and then the elastic rope 312 is pulled or loosened, so that the elastic force of the elastic rope 312 between the L-shaped rod 310 and the mounting plate 301 is different, and then the extrusion bolt 314 is rotated again to squeeze and fix the elastic rope 312. Through this operation, the spray port of the release agent tank 308 can be adjusted to correspond to the cavity of the lower mold 1. At this time, the pressing plate 309 is in a state of squeezing the release agent tank 308, so that the release agent sprayed by the release agent tank 308 is sprayed on the cavity, further improving the installation effect. The effect of the use of the arrangement is that when the release agent tank 308 is replaced, the threaded rod 305 is rotated to drive the two sets of extrusion plates 304 to separate from each other, thereby releasing the extrusion of the release agent tank 308, and then the used release agent tank 308 is taken out, replaced with a new release agent tank 308, and placed between the two sets of extrusion plates 304, and then the threaded rod 305 is rotated in the opposite direction to drive the two sets of extrusion plates 304 to move closer to each other to extrude and fix the release agent tank 308, and as the extrusion plates 304 move, the limit block 306 is driven to slide in the limit groove 307. Through the setting of the limit block 306 and the limit groove 307, the extrusion plate 304 can be limited, making the extrusion plate 304 more stable during movement.

[0046] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A small plastic gear injection mold, comprising a lower mold (1) and an upper mold (2) arranged above the lower mold (1), characterized in that: An automatic spraying assembly (3) is installed on the lower mold (1); The automatic spraying assembly (3) comprises a mounting plate (301) fixed to one side of the surface of the lower mold (1), an electric push rod (302) fixed to the mounting plate (301) by bolts, and a release agent tank (308) arranged at the output end of the electric push rod (302); A pressing plate (309) is installed at the pressing end of the release agent tank (308), and symmetrically arranged L-shaped rods (310) are fixed to the surface of the pressing plate (309). Two groups of the L-shaped rods (310) slide on the mounting plate (301), and an elastic rope (312) is provided between the L-shaped rods (310) and the mounting plate (301).

2. A small plastic gear injection mold according to claim 1, characterized in that: A sliding groove adapted to the L-shaped rod (310) is provided on the surface of the mounting plate (301), and the L-shaped rod (310) and the mounting plate (301) are slidably connected via the sliding groove.

3. The small plastic gear injection mold according to claim 2, characterized in that: A fixing block 1 (311) is fixedly mounted on the surface of the L-shaped rod (310), and a fixing block 2 (313) corresponding to the fixing block 1 (311) is fixed on the surface of the mounting plate (301). A through hole is provided inside the fixing block 2 (313), and an extrusion bolt (314) is threadedly connected to the surface of the fixing block 2 (313) through the threaded hole. One end of the elastic rope (312) is fixedly connected to the fixing block 1 (311), and the other end of the elastic rope (312) passes through the through hole of the fixing block 2 (313). The elastic rope (312) is squeezed and fixed by screwing the extrusion bolt (314).

4. The small plastic gear injection mold according to claim 1, characterized in that: A U-shaped frame (303) is fixed to the output end of the electric push rod (302), and a threaded rod (305) is rotatably connected to the interior of the U-shaped frame (303) via a bearing. The surface of the threaded rod (305) is threadedly connected to symmetrically arranged extrusion plates (304), and the threads on the threaded rod (305) are designed to be symmetrically opposite in structure with the center. Two groups of extrusion plates (304) are respectively threadedly connected to opposite threads of the threaded rod (305). The release agent tank (308) is located between the two groups of extrusion plates (304). One end of the threaded rod (305) passes through the U-shaped frame (303) and extends to the outside of the U-shaped frame (303).

5. The small plastic gear injection mold according to claim 4, characterized in that: A limiting block (306) is fixed on one side of the extrusion plate (304), and a limiting groove (307) adapted to the limiting block (306) is provided on the surface of the U-shaped frame (303), and the limiting block (306) and the U-shaped frame (303) are slidably connected via the limiting groove (307).

6. The small plastic gear injection mold according to claim 5, characterized in that: A V-shaped groove is formed on the side where the two groups of extrusion plates (304) are close to each other.

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