Energy-saving injection mold convenient to demold

Abstract

The utility model relates to the technical field of injection molds, in particular to an energy-saving injection mold convenient to demold, which comprises a mounting frame and a fixed mold fixedly connected with the mounting frame, the fixed mold is fixedly connected with a guide rod, a hydraulic push rod is started to open a movable mold, and when the movable mold is opened to a specified position, a sliding plate is limited, and the hydraulic push rod stops working simultaneously. At the moment, the movable mold continuously moves by utilizing self inertia to extrude the force storage spring, and meanwhile, the ejector pin moves relative to the movable mold to eject a product, so that preliminary demolding is carried out, and then when the movable mold stops moving due to buffering of the force storage spring and the reset force of the force storage spring reaches the maximum, the limitation of the magnet is broken through, so that the rectangular plate is pushed to move; and the linkage assembly is used for rapidly pushing the ejector pin to continuously move to push out a product, so that secondary demolding operation is performed, the inertia of the movable mold is recycled, the effect of amplifying the moving stroke of the ejector pin is achieved, demolding is facilitated, meanwhile, the energy utilization rate is increased, and energy is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an energy-saving injection mold which is easy to demould. Background Art

[0002] An injection mold is a tool used to produce plastic products. It consists of two or more parts, usually including a fixed mold and a movable mold. The injection mold injects molten plastic material into the mold cavity and then cools and solidifies to form the desired product shape. In existing injection molds, ejectors are usually used to push the product out of the movable mold, and the drive modes of the ejectors are generally divided into two types: active and passive. The active ejector has its own drive device, such as a hydraulic push rod. After the mold is opened, the ejector is pushed to push the product out by starting the hydraulic push rod alone. The advantage of this design is that the ejection range of the ejector can be adjusted as needed without limitations. In another passive design, the ejector is slidably connected to the movable mold. During the movement and opening of the movable mold, the ejector will be blocked, and then the movable mold will continue to move, and the product will be pushed out by the ejector. The advantage of this design is that no additional device for driving the ejector is required, but the movable mold needs to move too much, which is not suitable for situations where the ejector needs to move more, because the additional drive of the movable mold needs to consume more energy. For this reason, we propose an energy-saving injection mold that is easy to demold. Utility Model Content

[0003] A technical problem to be solved by the present application is: how to design an injection mold that can amplify the moving stroke of the movable mold and apply it to the ejector pin.

[0004] In order to solve the above technical problems, the embodiment of the present application provides an energy-saving injection mold that is easy to demould, including a mounting frame and a fixed mold fixedly connected to the mounting frame, a guide rod fixedly connected to the fixed mold, a movable mold slidably connected to the guide rod, and a hydraulic push rod fixedly connected to the mounting frame, the extended end of the hydraulic push rod is connected to the movable mold, and also includes:

[0005] The sliding plate is slidably arranged on the guide rod and connected to the movable mold, and an ejector is arranged on the sliding plate. One end of the ejector slides through the movable mold, and the hydraulic push rod is started to open the movable mold, driving the sliding plate to move. After the sliding plate is restricted, the hydraulic push rod stops moving, and the movable mold continues to move due to its own inertia, so that the ejector pushes the product;

[0006] The force storage component is arranged on one side of the movable mold. The movable mold moves due to inertia, and the force storage component is compressed and stores force at the same time;

[0007] The linkage component is arranged on the sliding plate. When the movable mold stops moving, the rear storage component is released, and the linkage component is used to drive the ejector to continue moving to eject the product.

[0008] In some embodiments, a limiting ring is fixedly connected to the guide rod, and the movable mold is moved, and the limiting ring is used to limit the movement of the sliding plate;

[0009] A U-shaped frame is fixedly connected to one side of the movable mold, and the output end of the hydraulic push rod slides through the U-shaped frame and is fixedly connected to a limiting circular plate. The hydraulic push rod is started and retracted, and the movable mold is pulled to move by the limiting circular plate.

[0010] The force storage component includes a sliding rod arranged on one side of the movable mold, and a through hole is opened on the sliding plate. A force storage spring is sleeved on the sliding rod, and one end of the force storage spring passes through the through hole. One end of the sliding rod is slidably connected to a rectangular plate, and a locking piece is arranged between the rectangular plate and the sliding plate for locking the sliding plate.

[0011] In some embodiments, the locking member includes a magnet fixedly connected to the rectangular plate, and the sliding plate is fixedly connected to an iron plate. The magnet is used to absorb the iron plate to lock the rectangular plate. The movable mold moves due to its own inertia and continuously compresses the force storage spring. When the movable mold stops, the restoring force of the force storage spring breaks through the suction force of the magnet, thereby pushing the rectangular plate to move.

[0012] In some embodiments, the linkage assembly includes a movable plate arranged at one end of the ejector pin, the movable plate is provided with an axis 1, the rectangular plate is provided with a sliding frame, the sliding frame is also provided with an axis 1, a lever is provided between the two axes 1, both ends of the lever are provided with sliding grooves, the two axes 1 are correspondingly located in the two sliding grooves, and the lever is rotatably connected to the sliding plate through a rotating shaft, the rectangular plate is moved, and the lever is used to push the ejector pin to move.

[0013] In some embodiments, there are two sliding frames, which are symmetrically arranged on a rectangular plate, and an adjustment component is arranged on the rectangular plate to adjust the distance between the two sliding frames.

[0014] In some embodiments, the adjustment component includes an axis 2 disposed on a rectangular plate, and two screws are symmetrically disposed on the axis 2. The two screws have opposite thread directions, and the two screws pass through the two sliding frames respectively. Rotating the axis 1 drives the two sliding frames to move.

[0015] It can be seen from the above technical solutions that, compared with the prior art, the utility model discloses an energy-saving injection mold that is easy to demould, and has the following beneficial effects:

[0016] Start the hydraulic push rod to open the movable mold. When the movable mold opens to the specified position, the sliding plate is restricted and the hydraulic push rod stops working. At this time, the movable mold continues to move by its own inertia, squeezing the force storage spring. At the same time, the ejector moves relative to the movable mold to push the product, thereby performing preliminary demoulding. Then, when the movable mold stops moving due to the buffering of the force storage spring, the reset force of the force storage spring reaches the maximum, and then breaks through the limitation of the magnet, thereby pushing the rectangular plate to move, and then using the linkage component to quickly push the ejector to continue moving to eject the product, thereby performing a secondary demoulding operation, and then recycling the inertia of the movable mold to achieve the effect of enlarging the ejector movement stroke, thereby facilitating demoulding while improving energy utilization and being more energy-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model;

[0019] Figure 2 For this utility model Figure 1 Another structural diagram;

[0020] Figure 3 For this utility model Figure 2 Schematic diagram of the structure of the middle A area;

[0021] Figure 4 For this utility model Figure 2 Schematic diagram of the local cross-section structure;

[0022] Figure 5 For this utility model Figure 4 Schematic diagram of the structure of the middle B area;

[0023] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of the present utility model;

[0024] Figure 7 For this utility model Figure 6 Schematic diagram of the structure of the middle C area.

[0025] In the figure: 1-mounting frame; 11-fixed mold; 12-guide rod; 13-movable mold; 14-hydraulic push rod; 2-sliding plate; 3-thrust pin; 4-force storage component; 5-linkage component; 41-limiting ring; 42-U-shaped frame; 43-limiting circular plate; 44-sliding rod; 45-through hole; 46-force storage spring; 47-rectangular plate; 48-locking piece; 49-magnet; 51-iron plate; 52-movable plate; 53-axis one; 54-sliding frame; 55-lever; 56-slide groove; 57-adjusting component; 58-axis two; 59-screw. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Example 1

[0028] See also Figure 1-Figure 5 The utility model provides a technical solution: an energy-saving injection mold that is easy to demould, including a mounting frame 1 and a fixed mold 11 fixedly connected to the mounting frame 1, a guide rod 12 fixedly connected to the fixed mold 11, a movable mold 13 slidably connected to the guide rod 12, and a hydraulic push rod 14 fixedly connected to the mounting frame 1, and the extended end of the hydraulic push rod 14 is connected to the movable mold 13, and also includes:

[0029] The sliding plate 2 is slidably arranged on the guide rod 12 and connected to the movable mold 13. The sliding plate 2 is provided with an ejector pin 3. One end of the ejector pin 3 slides through the movable mold 13, and the hydraulic push rod 14 is started to open the movable mold 13, driving the sliding plate 2 to move. After the sliding plate 2 is restricted, the hydraulic push rod 14 stops moving, and the movable mold 13 continues to move due to its own inertia, so that the ejector pin 3 pushes the product.

[0030] The force storage component 4 is arranged on one side of the movable mold 13. The movable mold 13 moves due to inertia, and the force storage component 4 is compressed and stores force at the same time;

[0031] The linkage assembly 5 is arranged on the sliding plate 2. When the movable mold 13 stops moving, the rear force storage assembly 4 is released, and the linkage assembly 5 is used to drive the ejector pin 3 to continue to move to push out the product. During the specific operation, the hydraulic push rod 14 is started to open the movable mold 13. When the movable mold 13 is opened to the specified position, the sliding plate 2 is restricted, and the hydraulic push rod 14 stops working. At this time, the movable mold 13 continues to move by its own inertia, squeezing the force storage spring 46. At the same time, the ejector pin 3 moves relative to the movable mold 13 to push the product, thereby performing preliminary demoulding. Then, when the movable mold 13 stops moving due to the buffering of the force storage spring 46, the reset force of the force storage spring 46 reaches the maximum, and then breaks through the limitation of the magnet 49, thereby pushing the rectangular plate 47 to move, and then using the linkage assembly 5 to quickly push the ejector pin 3 to continue to move to push out the product, thereby performing a secondary demoulding operation, and then recycling the inertia of the movable mold 13 to achieve the effect of amplifying the moving stroke of the ejector pin 3, thereby facilitating demoulding while improving energy utilization and being more energy-saving.

[0032] A limiting ring 41 is fixedly connected to the guide rod 12, and the movable mold 13 is moved, and the limiting ring 41 is used to limit the movement of the sliding plate 2;

[0033] A U-shaped frame 42 is fixedly connected to one side of the movable mold 13, and the output end of the hydraulic push rod 14 slides through the U-shaped frame 42 and is fixedly connected to a limiting circular plate 43. The hydraulic push rod 14 is started and retracted, and the movable mold 13 is pulled to move by the limiting circular plate 43;

[0034] The force storage assembly 4 includes a sliding rod 44 fixedly connected to one side of the movable mold 13, and a through hole 45 is opened on the sliding plate 2, a force storage spring 46 is sleeved on the sliding rod 44, one end of the force storage spring 46 passes through the through hole 45, and one end of the sliding rod 44 is slidably connected to a rectangular plate 47, both ends of the force storage spring 46 are respectively fixedly connected to the movable mold 13 and the rectangular plate 47, and a locking piece 48 is arranged between the rectangular plate 47 and the sliding plate 2 for locking the sliding plate 2.

[0035] The locking member 48 includes a magnet 49 fixedly connected to the rectangular plate 47, and an iron plate 51 is fixedly connected to the sliding plate 2. The magnet 49 is used to absorb the iron plate 51 to lock the rectangular plate 47. The movable mold 13 moves due to its own inertia and continuously compresses the force storage spring 46. When the movable mold 13 stops, the restoring force of the force storage spring 46 breaks through the suction force of the magnet 49, thereby pushing the rectangular plate 47 to move.

[0036] The linkage assembly 5 includes a moving plate 52 fixedly connected to one end of the ejector pin 3, a shaft 53 fixedly connected to the moving plate 52, a sliding frame 54 is provided on the rectangular plate 47, a shaft 53 is also fixedly connected to the sliding frame 54, a lever 55 is provided between the two shafts 53, and sliding grooves 56 are provided at both ends of the lever 55. The two shafts 53 are correspondingly located in the two sliding grooves 56 and are slidably connected to the inner walls thereof, and the lever 55 is rotatably connected to the sliding plate 2 through a rotating shaft, the rectangular plate 47 is moved, and the lever 55 is used to push the ejector pin 3 to move.

[0037] Example 2

[0038] See also Figure 1-Figure 7 , the utility model provides a technical solution: an energy-saving injection mold that is easy to demould, embodiment 2 is optimized on the basis of embodiment 1;

[0039] There are two sliding frames 54, and both are slidably connected to the rectangular plate 47. The two sliding frames 54 are symmetrically arranged on the rectangular plate 47, and an adjustment component 57 is arranged on the rectangular plate 47 to adjust the distance between the two sliding frames 54, thereby adjusting the distance between the force application point and the fulcrum, thereby adjusting the ejection speed and force of the ejector 3, thereby improving the applicability of the device.

[0040] The adjustment component 57 includes a second shaft 58 rotatably connected to the rectangular plate 47 via a bearing, and two screws 59 are symmetrically fixedly connected to the second shaft 58. The thread directions of the two screws 59 are opposite, and the two screws 59 pass through the two sliding frames 54 respectively and are connected thereto by threads. The rotating shaft 1 53 drives the two screws 59 to rotate, thereby driving the two sliding frames 54 to move.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0043] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An energy-saving injection mold for easy demoulding, comprising a mounting frame (1) and a fixed mold (11) fixedly connected to the mounting frame (1), a guide rod (12) fixedly connected to the fixed mold (11), a movable mold (13) slidably connected to the guide rod (12), and a hydraulic push rod (14) fixedly connected to the mounting frame (1), the extended end of the hydraulic push rod (14) being connected to the movable mold (13), characterized in that: Also included are: The sliding plate (2) is slidably arranged on the guide rod (12) and connected to the movable mold (13), and an ejector pin (3) is arranged on the sliding plate (2). One end of the ejector pin (3) slides through the movable mold (13), and the hydraulic push rod (14) is started to open the movable mold (13), thereby driving the sliding plate (2) to move. After the sliding plate (2) is restricted, the hydraulic push rod (14) stops moving, and the movable mold (13) continues to move due to its own inertia, so that the ejector pin (3) pushes the product. The force storage component (4) is arranged on one side of the movable mold (13). The movable mold (13) moves due to inertia, and the force storage component (4) is compressed to store force. The linkage assembly (5) is arranged on the sliding plate (2). When the movable mold (13) stops moving, the rear force storage assembly (4) is released, and the linkage assembly (5) is used to drive the ejector pin (3) to continue moving, thereby ejecting the product.

2. The energy-saving injection mold for easy demoulding according to claim 1, characterized in that: The guide rod (12) is fixedly connected with a limiting ring (41), and the movable mold (13) is moved, and the limiting ring (41) is used to limit the movement of the sliding plate (2); A U-shaped frame (42) is fixedly connected to one side of the movable mold (13), and the output end of the hydraulic push rod (14) slides through the U-shaped frame (42) and is fixedly connected to a limiting circular plate (43). The hydraulic push rod (14) is started and retracted, and the movable mold (13) is pulled to move by using the limiting circular plate (43); The force storage component (4) comprises a slide rod (44) arranged on one side of the movable mold (13), and a through hole (45) is opened on the sliding plate (2), a force storage spring (46) is sleeved on the slide rod (44), one end of the force storage spring (46) passes through the through hole (45), one end of the slide rod (44) is slidably connected to a rectangular plate (47), and a locking piece (48) is arranged between the rectangular plate (47) and the sliding plate (2) for locking the sliding plate (2).

3. The energy-saving injection mold for easy demoulding according to claim 2, characterized in that: The locking member (48) comprises a magnet (49) fixedly connected to the rectangular plate (47), and an iron plate (51) is fixedly connected to the sliding plate (2). The magnet (49) is used to absorb the iron plate (51) to lock the rectangular plate (47). The movable mold (13) moves due to its own inertia and continuously compresses the force storage spring (46). When the movable mold (13) stops, the restoring force of the force storage spring (46) breaks through the suction force of the magnet (49), thereby pushing the rectangular plate (47) to move.

4. The energy-saving injection mold for easy demoulding according to claim 3 is characterized in that: The linkage assembly (5) comprises a movable plate (52) arranged at one end of the ejector pin (3), the movable plate (52) being provided with a shaft (53), the rectangular plate (47) being provided with a sliding frame (54), the sliding frame (54) being provided with a shaft (53), a lever (55) being provided between the two shafts (53), both ends of the lever (55) being provided with sliding grooves (56), the two shafts (53) being correspondingly located in the two sliding grooves (56), and the lever (55) being rotatably connected to the sliding plate (2) via a rotating shaft, the rectangular plate (47) being moved, and the ejector pin (3) being pushed to move by the lever (55).

5. The energy-saving injection mold for easy demoulding according to claim 4, characterized in that: Two sliding frames (54) are provided, and the two sliding frames (54) are symmetrically arranged on the rectangular plate (47). An adjustment component (57) is arranged on the rectangular plate (47) to adjust the distance between the two sliding frames (54).

6. The energy-saving injection mold for easy demoulding according to claim 5, characterized in that: The adjustment assembly (57) comprises a second shaft (58) arranged on a rectangular plate (47), two screw rods (59) are symmetrically arranged on the second shaft (58), the thread directions of the two screw rods (59) are opposite, and the two screw rods (59) pass through the two sliding frames (54) respectively, and the rotation of the first shaft (53) drives the two sliding frames (54) to move.

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