Injection mold capable of achieving rapid discharging

Abstract

The invention relates to the technical field of injection molds, and particularly discloses a rapid blanking injection mold which comprises a mold frame, a mold body is arranged on one side of the mold frame, the mold body comprises a movable mold and a fixed mold which are installed on the mold frame, and a power mechanism used for driving the movable mold and the fixed mold to be opened and closed is arranged on the mold frame; an ejection mechanism is also arranged between the mold frame and the movable mold; and a buffer piece is arranged at the bottom of the mold frame and is in transmission connection with the ejection mechanism through a variable-speed linkage mechanism. When the power mechanism drives the movable mold and the fixed mold to be opened, in the stroke that the ejection mechanism ejects a workpiece in the movable mold, the variable-speed linkage mechanism drives the buffer piece to slide on the mold frame so that the ejected workpiece can fall on the buffer piece, and at the moment, automatic bearing and buffering of the workpiece are achieved through linkage of the ejection mechanism and the buffer piece; collision damage or bounce damage caused by free falling of the workpiece is avoided, and the stability and the yield of discharging are improved.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, specifically to an injection mold with rapid material unloading. Background Technology

[0002] Most plastic products are formed using injection molds. Injection molds enable the efficient molding of plastic products with desired shapes, thus accelerating the development of injection molds. With increasing demands for product appearance, the need for two-color injection molded products is growing. Compared to traditional assemblies, two-color injection molded products have no assembly gaps and are more aesthetically pleasing.

[0003] In existing technologies, when injection molding two-color or different-material products, the first mold is used to injection mold the product, and then the qualified product is placed into the second mold for production, achieving the effect of overmolding the two-color product. The most commonly used two-color injection mold is the core-rotation two-color mold, whose main feature is that the core and shell of the product are exchanged by rotating the core, thereby injecting two different colored materials into the same product, thus achieving the two-color effect.

[0004] Existing technology includes a Chinese patent with authorization announcement number CN223223783U, entitled "A Two-Color Injection Mold." This patent discloses a two-color injection mold comprising a core, a fixed support on the rear side of the core, a sliding seat slidably disposed within the fixed support, an upper base plate and a lower base plate within the sliding seat, an upper slider slidably disposed within the upper base plate, and a lower slider slidably disposed within the lower base plate, both moving forward and backward. A horizontal hydraulic cylinder is disposed in the middle of the fixed support to drive the upper or lower slider, and a detachable hook structure is provided between the piston rod of the horizontal hydraulic cylinder and the upper or lower slider. The two-color injection mold provided in the above patent has the advantages of simple structure, low cost, high precision, and good adaptability.

[0005] In the prior art, such as the Chinese patent with authorization announcement number CN216139323U entitled "An Injection Mold for Car Radiator Processing with Edge Trimming Function", the above patent discloses an injection mold for car radiator processing with edge trimming function, including a mounting base plate, a material pushing and trimming mechanism, and a driving mechanism; the mounting base plate has three symmetrically distributed pads on its lower surface, a fixed mold base on the left side of the upper surface of the pads, a fixed mold core in the mounting opening in the middle of the fixed mold base through a connecting block, two symmetrically distributed T-shaped slide rails on the right side of the upper surface of the mounting base plate, a sliding opening at the bottom of the moving mold base slidingly connected to the T-shaped slide rails, a circular hole at the upper end of the moving mold base slidingly connected to a guide rod at the upper end of the right side of the fixed mold base, a moving mold head in the middle of the left side of the moving mold base, the moving mold head corresponding to the mold cavity in the middle of the fixed mold core, and a T-shaped mounting seat on the right side of the upper surface of the mounting base plate, the left side of the T-shaped mounting seat contacting the right end of the T-shaped slide rail.

[0006] As is known, workpieces are injection molded inside a mold. After the existing mold is opened, the molded product often relies on its own gravity or the adhesion of the mold core to stay on the moving mold side. Then, it needs to be ejected from the moving mold by an ejection mechanism so that the product can be successfully ejected.

[0007] However, in the above process, after the workpiece is ejected from the moving mold by the ejection mechanism, its falling trajectory and final landing point are often uncertain. The product may fall into the equipment or the ground due to bouncing and rolling, causing scratches, contamination or even damage to the product. Especially for precision products with high surface quality requirements, this uncontrollable feeding method is very likely to lead to an increase in scrap rate, which undoubtedly increases the complexity and cost of the system and has certain shortcomings. Summary of the Invention

[0008] The purpose of this invention is to provide an injection mold for rapid material feeding, so as to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a rapid material unloading injection mold, comprising a mold frame, a mold body disposed on one side of the mold frame, the mold body comprising a moving mold and a fixed mold mounted on the mold frame, and a power mechanism for driving the moving mold and the fixed mold to open and close; and an ejection mechanism disposed between the mold frame and the moving mold; a buffer member disposed at the bottom of the mold frame, and the buffer member being connected to the ejection mechanism via a speed-changing linkage mechanism; when the power mechanism drives the moving mold and the fixed mold to open, during the stroke of the ejection mechanism ejecting the workpiece inside the moving mold, the buffer member is driven to slide on the mold frame via the speed-changing linkage mechanism, so that the ejected workpiece falls on the buffer member.

[0010] Furthermore, the buffer includes a support frame mounted on the mold frame, and a contact plate is slidably connected inside the support frame.

[0011] Furthermore, the ejection mechanism includes a top plate slidably connected inside the moving mold, and a plurality of ejector rods are fixedly connected to the top plate, the ejector rods being slidably connected to the moving mold; a trigger element is provided at the end of the top plate away from the ejector rods, and the trigger element intermittently abuts against the mold frame.

[0012] Furthermore, the speed-changing linkage mechanism includes a drive rack fixedly connected to the top plate, and a first rotating rod and a second rotating rod rotatably connected inside the bearing frame. A speed-changing transmission component is provided between the first rotating rod and the second rotating rod, and the drive rack is drively connected to the first rotating rod. A linkage unit is provided between the second rotating rod and the contact plate. When the top plate slides inside the moving mold to eject the injection-molded workpiece, the contact plate is driven to slide out inside the bearing frame through the cooperation between the speed-changing transmission component and the linkage unit.

[0013] Furthermore, the transmission component includes a first gear mounted on a first rotating rod and a second gear mounted on a second rotating rod, wherein the first gear meshes with the second gear.

[0014] Furthermore, the number of teeth on the second gear is twice the number of teeth on the first gear.

[0015] Furthermore, the linkage unit includes a third gear mounted on the second rotating rod, and a linkage rack is fixedly connected to the contact plate, the linkage rack meshing with the third gear.

[0016] Furthermore, multiple return springs are provided between the contact plate and the support frame.

[0017] Furthermore, a plurality of limiting components are provided between the contact plate and the support frame; the limiting components include a limiting strip fixedly connected to the contact plate, and a limiting groove adapted to the limiting strip is provided on the support frame, and the limiting strip and the limiting groove are slidably connected.

[0018] Furthermore, the triggering element includes multiple connecting rods fixedly connected to the top plate, the multiple connecting rods being fixedly connected to each other through a gathering plate, and a power frame being fixedly connected to the moving mold, the output end of the power mechanism being connected to the power frame, and a triggering rod being fixedly connected to the gathering plate, the triggering rod intermittently abutting against the mold frame, and the triggering rod being slidably connected to the power frame.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: This rapid material feeding injection mold, through the cooperation between the mold frame, mold body, power mechanism, buffer component, and speed-changing linkage mechanism, achieves the following during use: when the power mechanism drives the moving mold to open with the fixed mold, the ejection mechanism ejects the workpiece inside the moving mold. During this stroke, the speed-changing linkage mechanism drives the buffer component to slide on the mold frame, so that the ejected workpiece lands on the buffer component. At this time, through the linkage between the ejection mechanism and the buffer component, the workpiece is automatically received and buffered, avoiding collision damage or bouncing damage caused by free fall. This improves the stability of material feeding and the yield rate, while reducing manual intervention and improving production efficiency. It is especially suitable for the automated production of precision injection molded parts, requiring no additional power source, and realizing a highly efficient and controllable automated material feeding process, making it suitable for widespread application. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1This is a schematic diagram of the mold body structure provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the mold body from another perspective, provided in an embodiment of the present invention. Figure 3 This is a schematic diagram of the installation method of the ejection mechanism provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the installation position structure of the buffer section provided in an embodiment of the present invention; Figure 5 This is a front view of the mold body provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the installation method of the ejection mechanism and buffer section provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the installation method of the speed-changing linkage mechanism provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the installation position structure of the buffer section and the speed-changing linkage mechanism provided in an embodiment of the present invention; Figure 9 This is a partial structural diagram of a speed transmission component provided in an embodiment of the present invention; Figure 10 This is a schematic diagram of the overall structure provided for an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached drawings: 1. Mold frame; 2. Mold body; 3. Fixed mold; 4. Moving mold; 5. Bearing frame; 6. Contact plate; 7. Power frame; 8. Ejection mechanism; 81. Ejector rod; 82. Ejector plate; 83. Connecting rod; 84. Gathering plate; 85. Trigger rod; 9. Speed ​​change linkage mechanism; 91. Drive rack; 92. Speed ​​change transmission component; 93. Linkage unit; 10. Return spring; 11. Limiting component. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figures 1-10This invention provides a technical solution: a rapid material unloading injection mold, including a mold frame 1, a mold body 2 disposed on one side of the mold frame 1, the mold body 2 including a moving mold 4 and a fixed mold 3 mounted on the mold frame 1, and a power mechanism for driving the moving mold 4 and the fixed mold 3 to open and close the mold is disposed on the mold frame 1; and an ejection mechanism 8 is disposed between the mold frame 1 and the moving mold 4; a buffer is disposed at the bottom of the mold frame 1, and the buffer is connected to the ejection mechanism 8 through a speed-changing linkage mechanism 9; when the power mechanism drives the moving mold 4 and the fixed mold 3 to open the mold, during the stroke of the ejection mechanism 8 ejecting the workpiece inside the moving mold 4, the buffer is driven to slide on the mold frame 1 through the speed-changing linkage mechanism 9 so that the ejected workpiece falls on the buffer.

[0025] Specifically, this rapid-feeding injection mold includes a mold base 1, which also houses other components such as an injection mechanism and a material conveying mechanism. These structures are existing technologies and will not be elaborated upon here. A mold body 2 is mounted on one side of the mold base 1. The mold body 2 includes a moving mold 4 and a fixed mold 3 mounted on the mold base 1. The material conveying mechanism is connected to the fixed mold 3 via an injection port, used to convey raw materials into the mold body 2. The mold base 1 is equipped with a power mechanism, typically a cylinder, to drive the moving mold 4 and the fixed mold 3 to open and close. An ejection mechanism 8 is also provided between the mold base 1 and the moving mold 4. This ejection mechanism ejects the injection-molded workpiece, thus unloading the workpiece from the moving mold 4. More specifically, a buffer is provided at the bottom of the mold base 1. This buffer cushions the workpiece as it detaches from the moving mold 4, providing some protection. Furthermore, the buffer component is connected to the ejection mechanism 8 via a speed-changing linkage mechanism 9, improving the working efficiency of the injection mold and resulting in better performance. More specifically, when the power mechanism drives the moving mold 4 and the fixed mold 3 to open, the ejection mechanism 8 ejects the workpiece inside the moving mold 4. During this ejection stroke, the speed-changing linkage mechanism 9 drives the buffer component to slide on the mold base 1, so that the ejected workpiece lands on the buffer component. At this time, the linkage between the ejection mechanism 8 and the buffer component achieves automatic workpiece reception and buffering, avoiding collision damage or bouncing damage caused by free fall, improving the stability of material feeding and the yield rate, while reducing manual intervention and improving production efficiency. It is especially suitable for the automated production of precision injection molded parts, requiring no additional power source, and realizing a highly efficient and controllable automated feeding process, making it suitable for widespread use.

[0026] In the embodiments provided by the present invention, the buffer includes a support frame 5 mounted on the mold frame 1. A contact plate 6 is slidably connected inside the support frame 5. When the workpiece is ejected, the contact plate 6 extends out of the support frame 5 under the linkage to receive the workpiece. In this process, the structure of the support frame 5 and the sliding contact plate 6 makes the buffer extendable and retractable, so that it can quickly extend to receive the workpiece when needed and retract to save space when not in use. At the same time, the contact plate 6 provides a flat receiving surface, further protecting the surface of the workpiece from scratches.

[0027] In the embodiments provided by the present invention, the ejection mechanism 8 includes a top plate 82 slidably connected inside the moving mold 4, and a plurality of ejector rods 81 fixedly connected to the top plate 82. The ejector rods 81 are slidably connected to the moving mold 4. A trigger is provided at one end of the top plate 82 away from the ejector rods 81. The trigger intermittently abuts against the mold frame 1. When the moving mold 4 moves, the trigger contacts the mold frame 1, pushes the top plate 82 to drive the ejector rods 81 to eject the workpiece. No additional power source is required, and the working effect is higher.

[0028] In the embodiments provided by the present invention, the speed-changing linkage mechanism 9 includes a drive rack 91 fixedly connected to the top plate 82, and a first rotating rod and a second rotating rod rotatably connected inside the bearing frame 5. A speed-changing transmission component 92 is provided between the first rotating rod and the second rotating rod, and the drive rack 91 is drively connected to the first rotating rod. A linkage unit 93 is provided between the second rotating rod and the contact plate 6. When the top plate 82 slides inside the moving mold 4 to eject the injection-molded workpiece, the contact plate 6 is driven to slide out inside the bearing frame 5 through the cooperation between the speed-changing transmission component 92 and the linkage unit 93. The speed-changing transmission component 92 includes a first gear mounted on the first rotating rod, and a second gear mounted on the second rotating rod, with the first gear meshing with the second gear. The linkage unit 93 includes a third gear mounted on the second rotating rod, and a linkage rack is fixedly connected to the contact plate 6, with the linkage rack meshing with the third gear.

[0029] In the embodiments provided by the present invention, the number of teeth on the second gear is twice the number of teeth on the first gear. By using the gear ratio, a speed reduction transmission is achieved so that the extension speed of the contact plate 6 is lower than the ejection speed, thereby avoiding excessive impact between the workpiece and the contact plate 6 and further protecting the integrity of the workpiece surface.

[0030] In the embodiments provided by the present invention, a plurality of reset springs 10 are provided between the contact plate 6 and the bearing frame 5. The reset of the reset springs 10 provides better support for the reset of the contact plate 6, resulting in better performance.

[0031] In the embodiments provided by the present invention, a plurality of limiting members 11 are provided between the contact plate 6 and the bearing frame 5; the limiting member 11 includes a limiting strip fixedly connected to the contact plate 6, and a limiting groove adapted to the limiting strip is provided on the bearing frame 5. The limiting strip and the limiting groove are slidably connected. The limiting member 11 ensures that the contact plate 6 will not deviate or derail during the sliding process, thereby improving the stability of the movement.

[0032] In the embodiments provided by the present invention, the triggering element includes a plurality of connecting rods 83 fixedly connected to the top plate 82, the plurality of connecting rods 83 being fixedly connected to each other through a gathering plate 84, and a power frame 7 being fixedly connected to the moving mold 4, the output end of the power mechanism being connected to the power frame 7, and a trigger rod 85 being fixedly connected to the gathering plate 84, the trigger rod 85 intermittently abutting against the mold frame 1, and the trigger rod 85 being slidably connected to the power frame 7.

[0033] After injection molding is completed, the power mechanism (such as a cylinder) drives the moving mold 4 to separate from the fixed mold 3, realizing mold opening. At this time, the ejection mechanism 8 starts to operate. Specifically, during the mold opening process, the moving mold 4 drives the triggering element (including the connecting rod 83, the gathering plate 84, and the triggering rod 85) to contact the mold frame 1. The triggering rod 85 intermittently abuts against the mold frame 1, pushing the top plate 82 to slide inside the moving mold 4. The multiple ejector rods 81 on the top plate 82 move forward accordingly, ejecting the injection-molded workpiece from the moving mold 4. While the ejector mechanism 8 is working, the drive rack 91 fixedly connected to the top plate 82 moves accordingly. The drive rack 91 meshes with the first gear on the first rotating rod in the speed-changing linkage mechanism 9, driving the first rotating rod to rotate. The first rotating rod transmits power to the second rotating rod through the speed-changing transmission component 92. The third gear on the second rotating rod meshes with the linkage rack fixed on the contact plate 6, thereby converting the rotation into linear sliding of the contact plate 6. During the ejector mechanism 8 ejecting the workpiece, the speed-changing linkage mechanism 9 causes the contact plate 6 to slowly and smoothly extend from the bearing frame 5 through gear transmission, forming a receiving surface.

[0034] After ejecting from the moving mold 4, the workpiece lands directly on the extended contact plate 6. The contact plate 6 acts as a buffer, preventing damage or loss due to free fall or bouncing. Once the workpiece is received, the contact plate 6 automatically retracts into the support frame 5 under the action of the return spring 10, completing one work cycle. The entire process achieves linkage between ejection and reception, requiring no additional power source, improving the stability and efficiency of material handling, and is particularly suitable for the automated production of precision injection molded parts.

[0035] It should be noted that all electrical equipment involved in this application can be powered by a storage battery or an external power source, and this application is equipped with a control system for controlling the operation of the entire equipment.

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rapid discharging injection mold, comprising a mold frame (1), a mold body (2) is arranged on one side of the mold frame (1), characterized in that: the mold body (2) comprises a movable mold (4) and a fixed mold (3) mounted on the mold frame (1), and a power mechanism for driving the movable mold (4) and the fixed mold (3) to open and close is arranged on the mold frame (1); a ejection mechanism (8) is further arranged between the mold frame (1) and the movable mold (4); a buffer is arranged at the bottom of the mold frame (1), and the buffer is in transmission connection with the ejection mechanism (8) through a variable speed linkage mechanism (9); when the power mechanism drives the movable mold (4) and the fixed mold (3) to open, the ejection mechanism (8) drives the buffer to slide on the mold frame (1) through the variable speed linkage mechanism (9) in the stroke of ejecting the workpiece in the movable mold (4), so that the ejected workpiece falls on the buffer. The buffer comprises a bearing frame (5) mounted on the mold frame (1), and a contact plate (6) is slidably connected in the bearing frame (5). The ejection mechanism (8) comprises a top plate (82) slidably connected in the movable mold (4), a plurality of ejector rods (81) fixedly connected to the top plate (82), and the ejector rods (81) are slidably connected to the movable mold (4); a trigger is arranged at the end of the top plate (82) away from the ejector rods (81), and the trigger intermittently abuts against the mold frame (1). The variable speed linkage mechanism (9) comprises a drive rack (91) fixedly connected to the top plate (82), a first rotating rod and a second rotating rod rotatably connected in the bearing frame (5), a variable speed transmission member (92) arranged between the first rotating rod and the second rotating rod, and the drive rack (91) is in transmission connection with the first rotating rod; a linkage unit (93) is arranged between the second rotating rod and the contact plate (6); 2. The rapid ejection injection mold of claim 1, wherein: When the top plate (82) slides in the movable mold (4) to eject the injection molded workpiece, the contact plate (6) is driven to slide out of the bearing frame (5) through the cooperation between the variable speed transmission member (92) and the linkage unit (93).

3. The rapid ejection injection mold of claim 2, wherein: The variable speed transmission member (92) comprises a first gear mounted on the first rotating rod, and a second gear mounted on the second rotating rod, and the first gear is engaged with the second gear.

4. The quick-ejecting injection mold of claim 2, wherein: The number of teeth on the second gear is twice the number of teeth on the first gear. The linkage unit (93) comprises a third gear mounted on the second rotating rod, and a linkage rack fixedly connected to the contact plate (6), and the linkage rack is engaged with the third gear. A plurality of return springs (10) are arranged between the contact plate (6) and the bearing frame (5).

5. The rapid ejection injection mold of claim 4, wherein: A plurality of limiting pieces (11) are arranged between the contact plate (6) and the bearing frame (5); the limiting piece (11) comprises a limiting strip fixedly connected to the contact plate (6), a limiting groove matched with the limiting strip is formed in the bearing frame (5), and the limiting strip is slidably connected with the limiting groove.

6. The quick-ejecting injection mold of claim 5, wherein: The trigger comprises a plurality of connecting rods (83) fixedly connected to the top plate (82), the connecting rods (83) are fixedly connected through a gathering plate (84), and a power frame (7) is fixedly connected to the movable mold (4).

7. The quick knockout injection mold of claim 4, wherein: ​ 8. The quick-ejecting injection mold of claim 4, wherein: ​ 9. The quick-ejecting injection mold of claim 1, wherein: ​ 10. The quick-ejecting injection mold of claim 3, wherein: ​ The power mechanism output end is connected with the power frame (7), and the gathering plate (84) is fixedly connected with a trigger rod (85), the trigger rod (85) is intermittently in contact with the mold frame (1), and the trigger rod (85) is slidably connected with the power frame (7).

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