An injection molding mold

Abstract

The utility model discloses an injection molding mould, including front mould, middle mould, back mould, glue feeding system and transmission mechanism, wherein, the middle mould is located between the front mould and the back mould, the glue feeding system sets up in the middle mould with the back mould, and transmission mechanism is located between the front mould, the middle mould and the back mould, and sets up on the outer surface, when opening mould, through transmission mechanism realizes the front mould and the middle mould between and back mould and the middle mould between synchronous open mould. The utility model improves production efficiency, realized the middle mould and the front mould between and the middle mould and back mould between synchronous open and close mould, has guaranteed the steady, accurate in the process of open and close mould of mould, has guaranteed the forming precision and quality stability of mould, improved the versatility and flexibility of mould, reduced the equipment investment cost.

Description

Technical Field

[0001] This utility model belongs to the field of injection molding, and more specifically, it relates to an injection molding mold. Background Technology

[0002] Injection molds are the core tools used in the injection molding process to manufacture plastic products. They inject molten plastic into the mold cavity under high temperature and pressure, and after cooling and solidification, they form a finished product of a specific shape.

[0003] See Figure 1 As shown, injection molds typically consist of a core side (A) and a cavity side (B). These two parts work together through a specific structural design to mold plastic products. However, when it's necessary to increase the number of cores and cavities to improve production efficiency, this is often achieved by increasing the number of rows on the mold core plane corresponding to the moving mold part (A) and the fixed mold part (B). This increases the size of the mold core, leading not only to a decrease in its strength and rigidity but also to potential displacement and deformation during injection molding, affecting the molding accuracy and quality stability of the plastic products. Furthermore, it may cause the mold size to exceed the applicable range of the existing injection molding machine, necessitating the replacement with a larger-sized machine. This increases equipment investment costs and reduces the mold's versatility and flexibility across different equipment and production scenarios, hindering companies from quickly adjusting production schedules according to market demands. Utility Model Content

[0004] In order to solve the problems existing in the prior art, this utility model aims to provide an injection molding mold that can increase the number of cores and cavities without increasing the size of the mold core, thereby effectively improving production efficiency and enhancing the versatility and flexibility of the mold.

[0005] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution:

[0006] An injection molding die, comprising:

[0007] A front mold, a middle mold, and a rear mold; the middle mold is located between the front mold and the rear mold, and after the front mold and the rear mold are both closed with the middle mold, forming cavities suitable for workpiece forming are formed between the middle mold and the front mold and between the middle mold and the rear mold;

[0008] A glue injection system; the glue injection system is disposed in the middle mold and the rear mold, and the molding material is injected into each of the formed molding cavities through the glue injection system;

[0009] A transmission mechanism is located between the front mold, the middle mold, and the rear mold, and is disposed on the outer surface. During mold opening, the transmission mechanism enables synchronous mold opening between the front mold and the middle mold, as well as between the rear mold and the middle mold.

[0010] Furthermore, both the front mold and the rear mold include a fixed plate, mold feet, and a cavity plate with a cavity structure; while the cavity plate is fixed to the fixed plate by a pair of mold feet, the cavity plate, the mold feet, and the fixed plate are respectively provided with guide holes with axially coincident centers, a guide sleeve is provided in the guide hole in the cavity plate, and a support column is provided between the fixed plate and the cavity plate.

[0011] Furthermore, the fixing plate and the cavity plate to which the rear mold belongs are provided with mounting holes for installing the glue injection system components.

[0012] Furthermore, the intermediate mold includes a pair of support plates locked together. Each set of support plates is provided with a guide post, and a core structure is provided on a pair of opposite surfaces of the support plates. The core structure is provided with a hot nozzle. A mounting groove for installing the glue injection system component is provided between the mating surfaces of the pair of support plates. The mounting groove is connected to the hot nozzle.

[0013] Furthermore, an auxiliary plate is provided on a pair of opposite surfaces of the support plate. Each auxiliary plate is set on the support plate on the corresponding side by a corresponding limiting screw. Each set of auxiliary plates is equipped with at least two sets of actuators, which can pull the auxiliary plate to move along the corresponding limiting screw.

[0014] Furthermore, the actuator includes a base, a pull rod, and a movable block; the pull rod is slidably inserted into the base, and a spring is provided in the movable block.

[0015] Furthermore, the core structure includes an inner core and an outer core sleeved on the inner core, both of which are detachably mounted on the support plate via corresponding locking bolts.

[0016] Furthermore, the transmission mechanism includes a rotary drum, on which a gear is sleeved, and a rack meshes with both the upper and lower ends of the gear.

[0017] Furthermore, each rack is equipped with a limit pin.

[0018] Furthermore, it also includes a slider mechanism corresponding to the molding cavity, the slider mechanism including a sliding component and an inclined guide post component.

[0019] The beneficial effects of this utility model are as follows: By setting a front mold, a middle mold, and a rear mold, a molding cavity is formed between the middle mold and the front mold, and between the middle mold and the rear mold. Without increasing the size of the mold core, the number of cores and cavities is increased, improving production efficiency. At the same time, through the transmission mechanism between the front mold, the middle mold, and the rear mold, the synchronous opening and closing of the mold between the middle mold and the front mold, and between the middle mold and the rear mold is realized. This ensures the smoothness and accuracy of the mold during the opening and closing process, guarantees the molding accuracy and quality stability of the mold, improves the versatility and flexibility of the mold, and reduces equipment investment costs.

[0020] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram for reference to the present invention;

[0023] Figure 2 This is a schematic diagram of the mold in the closed state of this utility model;

[0024] Figure 3 This is a cross-sectional view of the mold in the mold-closed state of this utility model;

[0025] Figure 4 This is a schematic diagram of the mold opening state of this utility model;

[0026] Figure 5 This is a schematic diagram of the front and rear mold structures of this utility model;

[0027] Figure 6 This is a schematic diagram of the rear mold structure of this utility model;

[0028] Figure 7 This is a schematic diagram of the middle mold structure of this utility model;

[0029] Figure 8 This is a cross-sectional view of the mold in this utility model;

[0030] Figure 9 This is a schematic diagram of the auxiliary plate of this utility model in the open state;

[0031] Figure 10 This is a schematic diagram of the actuator structure of this utility model;

[0032] Figure 11 A cross-sectional view of the actuator of this utility model.

[0033] Figure 12 This is a schematic diagram showing the state where the pull rod of this utility model is not in contact with the moving block;

[0034] Figure 13 This is a schematic diagram showing the state of the movable block being pulled by the pull rod of this utility model;

[0035] Figure 14 This is a schematic diagram showing the pull rod of this utility model in the disengaged state from the movable block;

[0036] Figure 15 This is a schematic diagram of the retracted state of the transmission mechanism of this utility model;

[0037] Figure 16 This is a schematic diagram of the transmission mechanism of this utility model in its unfolded state;

[0038] Figure 17 This is a schematic diagram of the slider mechanism of this utility model.

[0039] The following are the labeling instructions in the diagram: 1. Front mold; 2. Middle mold; 3. Rear mold; 4. Glue injection system; 5. Transmission mechanism; 6. Slider mechanism; 11. Fixed plate; 12. Mold foot; 13. Cavity plate; 14. Guide sleeve; 15. Support column; 111. Guide hole; 112. Mounting hole; 131. Cavity structure; 21. Support plate; 22. Guide column; 23. Core structure; 24. Auxiliary plate; 25. Actuating mechanism; 211. Mounting groove; 231. Hot runner; 251. Base; 252. Tie rod; 253. Movable block; 254. Spring; 51. Rotary pull; 52. Gear; 53. Rack; 54. Limit pin; 55. Fixed frame; 61. Sliding assembly; 62. Angled guide column assembly. Detailed Implementation

[0040] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0041] It should be noted that all directional indicators (such as up, down, left, right, front, back, upper end, lower end, top, bottom, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0042] See Figure 2-4As shown, an injection molding die includes a front mold 1, a middle mold 2, a rear mold 3, a glue injection system 4, and a transmission mechanism 5. The middle mold 2 is located between the front mold 1 and the rear mold 3. After the front mold 1 and the rear mold 3 are both closed with the middle mold 2, molding cavities suitable for workpiece molding are formed between the middle mold 2 and the front mold 1, and between the middle mold 2 and the rear mold 3. In this embodiment, molding cavities suitable for workpiece molding are formed between the middle mold 2 and the front mold 1, and between the middle mold 2 and the rear mold 3. The mold has two sets of molding cavities, but it is not limited to two sets and can be set with more, depending on the actual situation; the injection system 4 is set in the middle mold 2 and the rear mold 3, and the molding material is injected into each of the molding cavities through the injection system 4; the transmission mechanism 5 is located between the front mold 1, the middle mold 2 and the rear mold 3, and is set on the outer surface. When the mold is opened, the front mold 1 and the middle mold 2 and the rear mold 3 and the middle mold 2 are opened synchronously through the transmission mechanism 5.

[0043] Further, see Figure 5-6 As shown, in this embodiment, both the front mold 1 and the rear mold 3 include a fixing plate 11, mold feet 12, and a cavity plate 13 with a cavity structure 131. The cavity plate 13 is fixed to the fixing plate 11 by a pair of mold feet 12. The cavity plate 13, mold feet 12, and fixing plate 11 are each provided with axially aligned guide holes 111. A total of four sets of guide holes 111 are provided, and each guide hole 111 within the cavity plate 13 contains a guide... The mold includes a sleeve 14 and a support column 15 between the fixed plate 11 and the cavity plate 13. The support column 15 enhances the overall structural strength of the mold, strengthens the load-bearing capacity of the cavity plate 13, prevents it from deforming under pressure during injection molding, and ensures the molding accuracy and stability of the mold. When the mold is installed, the rear mold 3 is fixedly connected to the fixed platen of the injection molding machine through its fixed plate 11, and the front mold 1 is fixedly connected to the moving platen of the injection molding machine through its fixed plate 11.

[0044] In this embodiment, see further. Figure 5-6 As shown, mounting holes 112 are provided on the fixing plate 11 and the cavity plate 13 to which the rear mold 3 belongs, and the glue injection system 4 components are installed through the mounting holes 112.

[0045] Further, see Figure 7-8As shown, in this embodiment, the middle mold 2 includes a pair of support plates 21 locked together by corresponding locking bolts. Each set of support plates 21 is provided with guide pins 22 corresponding to the guide holes 111. The front mold 1 and the rear mold 3 achieve stable and accurate movement relative to the support plates 21 through precise cooperation between their respective guide holes 111 and guide pins 22, ensuring accurate positioning during movement and avoiding problems such as offset and jamming. Cores are respectively provided on a pair of opposite surfaces of the support plates 21 (i.e., the surfaces opposite to the cavity structure 131 to which the front mold 1 and the rear mold 3 belong). The core structure 23 has a hot nozzle 231, and a mounting groove 211 is provided between the mating surfaces of the pair of bearing plates 21. The mounting groove 211 communicates with the hot nozzle 231. The glue injection system 4 is installed and fixed through the mounting groove 211. After the nozzle of the glue injection system 4 is fixed, the front end of the nozzle is inserted into the hot nozzle 231. After the molds are closed between the middle mold 2 and the front mold 1 and between the middle mold 2 and the rear mold 3, glue is injected into the molding cavity to realize the molding operation. In this embodiment, the glue injection system 4 adopts a manhole glue injection system.

[0046] See also Figure 7-8 As shown, in this embodiment, an auxiliary plate 24 is respectively provided on a pair of opposite surfaces of the support plate 21. During installation, the auxiliary plate 24 is set on the support plate 21 on the corresponding side by corresponding limiting screws. See [reference needed]. Figure 9 As shown, the auxiliary plate 24 can move relative to the corresponding support plate 21 along the corresponding limiting screw, and the maximum distance of its movement is 20mm. That is, the maximum distance between the auxiliary plate 24 and the corresponding support plate 21 is 20mm. Of course, the distance at which the auxiliary plate 24 can move is only one embodiment and is not intended to limit the scope of this application. Its specific value can be adjusted according to the actual situation. By setting the movable auxiliary plate 24, the bottom surface of the side wall of the molded product is pushed to realize the demolding action of the product and the core structure 23, thereby realizing the smooth separation of the molded product from the nozzle.

[0047] In this embodiment, to ensure precise control of the action nodes of the auxiliary plate 24 during the demolding process, each set of auxiliary plates 24 is equipped with four sets of actuators 25, but not limited to four sets; more can be provided as long as the requirements are met. Two sets of actuators 25 are respectively arranged on a pair of opposite surfaces of the auxiliary plate 24, and the two sets of actuators 25 on the same side are distributed vertically. See also... Figure 10As shown, each set of actuators 25 includes a base 251, a pull rod 252, and a movable block 253; wherein, the pull rod 252 is L-shaped, and the horizontal connecting rod of the pull rod 252 is slidably inserted into the base 251, and a spring 254 is provided in the movable block 253; during installation, refer to... Figure 11 As shown, the base 251 is fixed to the support plate 21, the tie rod 252 is fixed to the cavity plate 13 via its horizontal connecting rod, and the movable block 253 is fixed inside the auxiliary plate 24 by corresponding limiting bolts. In its natural state, the front end of the movable block 253 extends out of the auxiliary plate 24. At this time, the spring 254 is pressed between the movable block 253 and the auxiliary plate 24. When no external force is applied, the spring 254 has a tendency to drive the movable block 253 to move away from the auxiliary plate 24. During mold closing, see... Figure 11 As shown, the pull rod 252 passes through the base 251. At this time, a gap is maintained between the vertical connecting rod of the pull rod 252 and the movable block 253, and their projection surfaces partially overlap. The movable block 253 abuts against the base 251, and the abutting surface is an inclined surface. During mold opening, as the front mold 1 and the rear mold 3 move away from the middle mold 2 relative to the middle mold 2, three mold opening stages are formed, wherein, see Figure 12 As shown, in stage one, when the vertical connecting rod of the pull rod 252 is not in contact with the movable block 253, the auxiliary plate 24 remains stationary due to the action of the base 251 against the movable block 253; see also Figure 13 As shown, in stage two, when the vertical connecting rod of the pull rod 252 contacts the movable block 253 and pulls the movable block 253, the pull rod 252 will pull the auxiliary plate 24 to move through the movable block 253. During this stage, as the pull rod 252 pulls the auxiliary plate 24 through the movable block 253, the movable block 253 slides along the inclined surface abutting the base 251, and simultaneously moves gradually inwards into the auxiliary plate 24. (See also...) Figure 14 As shown, in stage three, as the movable block 253 moves inward toward the auxiliary plate 24 under force, the pull rod 252 disengages from the pull on the movable block 253 and detaches from the base 251, opening the mold between the front mold 1 or rear mold 3 and the middle mold 2 to the maximum spacing position. It should be noted that the inclination angle of the base 251 relative to the abutting surface of the movable block 253 must satisfy the following condition: when the pull rod 252 pulls the auxiliary plate 24 to the maximum or less than the maximum moving distance (20mm) through the movable block 253, the inclination angle drives the movable block 253 to move inward toward the auxiliary plate 24 a distance that ensures that the vertical connecting plate of the pull rod 252 and the movable block 253 can be disengaged.

[0048] Further, see Figure 15 As shown, in this embodiment, two sets of transmission mechanisms 5 are provided, which are arranged opposite to each other on the sidewall between the front mold 1, the middle mold 2, and the rear mold 3. Each set of transmission mechanisms 5 includes a rotary drawer 51, a gear 52, and two sets of racks 53. During installation, one end of the rotary drawer 51 is rotatably mounted on a pair of bearing plates 21 via corresponding bearings, while the other end of the rotary drawer 51 is rotatably mounted on a fixed frame 55 via corresponding bearings. The fixed frame 55 is fixed to the pair of bearing plates 21. The gear 52 is sleeved on the rotary drawer 51, and the gear 52 is positioned close to the rotary drawer 51. The gear 52 is connected by a key, with two sets of racks 53 respectively disposed at the upper and lower ends of the gear 52, and both meshing with the racks 53. One end of one set of racks 53 is fixedly connected to the fixed plate 11 to which the front mold 1 belongs, while one end of the other set of racks 53 is fixedly connected to the fixed plate 11 to which the rear mold 3 belongs. When the mold is closed or opened, when one set of racks 53 is driven to move, the moving racks 53 will drive the gear 52 to rotate, and the rotating gear 52 will drive the other set of racks 53 to move in the opposite direction, thereby realizing synchronous mold closure or opening between the front mold 1 and the middle mold 2, and between the rear mold 3 and the middle mold 2.

[0049] In this embodiment, see Figure 16 As shown, limiting pins 54 are respectively provided on the fixed end away from the rack 53. The maximum stroke of the rack 53 is limited by the cooperation of the limiting pins 54 with the side of the fixing frame 55, that is, the maximum mold opening distance is limited. In addition, it should be noted that when the rack 53 reaches the maximum stroke, it should be ensured that a part of the front end of the guide post 22 remains in the guide hole 111 belonging to the cavity plate 13. In this embodiment, the maximum stroke of the rack 53 is set to 215mm, and the length of the guide post 22 remaining in the guide hole 111 belonging to the cavity plate 13 is 32mm.

[0050] Further, see Figure 17 As shown, in this embodiment, the mold also includes a slider mechanism 6 corresponding to the forming cavity. The slider mechanism 6 includes a sliding component 61 and an inclined guide post component 62. For installation, see [reference needed]. Figure 4 As shown, the sliding component 61 is slidably mounted on the auxiliary plate 24, while the inclined guide post component 62 is mounted on the fixed plate 11. During operation, the sliding component 61 and the inclined guide post 62 cooperate to achieve highly precise and coordinated movements during mold opening and closing, ensuring product molding quality and demolding efficiency. It should be noted that when the molded product has no side holes, undercuts, or other structures on its sidewalls, the sliding block mechanism 6 is not required.

[0051] The working principle of this utility model is as follows:

[0052] During the molding process, the mold is first placed on the injection molding machine. At this time, the fixed plate 11 of the rear mold 3 is fixedly connected to the fixed platen of the injection molding machine, and the fixed plate 11 of the front mold 1 is fixedly connected to the moving platen of the injection molding machine. The moving platen of the injection molding machine moves forward, pushing the front mold 1 forward, thereby driving the transmission mechanism 5 to make the front mold 1 and the middle mold 2, as well as the rear mold 3 and the middle mold 2, close synchronously. Then, the injection molding machine injects glue into the molding cavity through the glue injection system 4, and after the glue injection is completed, it performs pressure holding and cooling. Then, the moving platen of the injection molding machine retracts, pulling the front mold 1 backward, thereby driving the transmission mechanism 5 to make the front mold 1 and the middle mold 2, as well as the rear mold 3 and the middle mold 2, open synchronously. After the mold opening is completed, the product is removed by the robot, completing one round of injection molding.

[0053] During the mold closing and opening process, the moving platen of the injection molding machine drives the front mold 1 to move, which in turn drives the rack 53 fixed to the front mold 1 to move. The moving rack 53 drives the gear 52 to rotate, and the rotating gear 52 drives another set of racks 53 fixed to the rear mold 3 to move in the opposite direction, thereby realizing the synchronous mold closing or opening between the front mold 1 and the middle mold 2, as well as between the rear mold 3 and the middle mold 2.

[0054] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An injection molding die, characterized in that, include: A front mold (1), a middle mold (2), and a rear mold (3); the middle mold (2) is located between the front mold (1) and the rear mold (3), and after the front mold (1) and the rear mold (3) are both closed with the middle mold (2), forming cavities suitable for forming workpieces are formed between the middle mold (2) and the front mold (1) and between the middle mold (2) and the rear mold (3); The injection system (4) is located in the middle mold (2) and the rear mold (3), and the injection system (4) is used to inject molding material into each of the mold cavities formed. Transmission mechanism (5); The transmission mechanism (5) is located between the front mold (1), the middle mold (2) and the rear mold (3) and is disposed on the outer surface. When the mold is opened, the transmission mechanism (5) enables the synchronous opening of the front mold (1) and the middle mold (2) and the rear mold (3) and the middle mold (2).

2. The injection molding die according to claim 1, characterized in that: Both the front mold (1) and the rear mold (3) include a fixed plate (11), mold feet (12), and a cavity plate (13) with a cavity structure (131). The cavity plate (13) is fixed to the fixed plate (11) by a pair of mold feet (12). The cavity plate (13), the mold feet (12), and the fixed plate (11) are respectively provided with guide holes (111) with axial centers coincident. A guide sleeve (14) is provided in the guide hole (111) in the cavity plate (13). A support column (15) is provided between the fixed plate (11) and the cavity plate (13).

3. The injection molding die according to claim 2, characterized in that: The fixing plate (11) to which the rear mold (3) belongs and the cavity plate (13) are provided with mounting holes (112) for installing the glue injection system (4) components.

4. The injection molding die according to claim 1, characterized in that: The middle mold (2) includes a pair of support plates (21) locked together. Each set of support plates (21) is provided with a guide post (22). At the same time, a core structure (23) is provided on a pair of opposite surfaces of the support plates (21). A hot nozzle (231) is provided on the core structure (23). A mounting groove (211) for installing the glue injection system (4) component is provided between the mating surfaces of the pair of support plates (21). The mounting groove (211) is connected to the hot nozzle (231).

5. The injection molding die according to claim 4, characterized in that: On a pair of opposite surfaces of the support plate (21), an auxiliary plate (24) is provided respectively. The auxiliary plates (24) are all set on the support plate (21) on the corresponding side by corresponding limiting screws. Each set of auxiliary plates (24) is equipped with at least two sets of actuators (25). The actuators (25) can pull the auxiliary plates (24) to move along the corresponding limiting screws.

6. The injection molding die according to claim 5, characterized in that: The actuator (25) includes a base (251), a pull rod (252), and a movable block (253); the pull rod (252) is slidably inserted into the base (251), and a spring (254) is provided in the movable block (253).

7. The injection molding die according to claim 4, characterized in that: The core structure (23) includes an inner core (231) and an outer core (232) sleeved on the inner core (231). Both the inner core (231) and the outer core (232) are detachably mounted on the support plate (21) by corresponding locking bolts.

8. The injection molding die according to claim 1, characterized in that: The transmission mechanism (5) includes a rotary drum (51) and a gear (52) sleeved on the rotary drum (51). A rack (53) meshes with both the upper and lower ends of the gear (52).

9. The injection molding die according to claim 8, characterized in that: Each rack (53) is provided with a limit pin (54).

10. The injection molding die according to claim 1, characterized in that: It also includes a slider mechanism (6) corresponding to the forming cavity, the slider mechanism (6) including a sliding component (61) and an inclined guide post component (62).

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