Injection mold easy to demold

Abstract

The utility model discloses an injection mold easy to demold, and particularly relates to the technical field of injection molds, the injection mold easy to demold comprises a bottom plate, the top of the bottom plate is fixedly connected with a portal frame, the top of the portal frame is provided with a clamping structure, the inner wall of the portal frame is fixedly connected with a mold opening mechanism, and the top of the bottom plate is fixedly connected with an injection mold shell. A lifting mechanism is arranged at the top of the bottom plate and arranged in the injection mold shell, and the clamping structure comprises two clamping columns symmetrically arranged at the top of the portal frame. By arranging the clamping structure, the upper mold plate does not need to be lifted all the time, the position of the upper mold plate can be easily fixed and moved, cooled plastic products can be conveniently taken out subsequently, manpower is saved by arranging the lifting mechanism, synchronous lifting is easily achieved, the automation degree is improved, and the production efficiency is improved. Therefore, the lower mold plate slides on the inner wall of the injection mold shell more stably, the mold is stressed more uniformly, and plastic products are prevented from being damaged due to uneven stress.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and more specifically, to an easy-to-demold injection mold. Background Technology

[0002] Injection molds are tools used to produce plastic products; they also give plastic products their complete structure and precise dimensions. Specifically, they involve injecting molten plastic into a mold cavity under high pressure using an injection molding machine. After cooling and solidification, the molded product is obtained. After molding, the product needs to be demolded. Currently, most injection molds are demolded manually. However, manual demolding is complex and cumbersome, hindering efficient demolding and reducing ease of use.

[0003] Chinese Patent No. CN218785745U discloses an easy-to-demold injection mold. This easy-to-demold injection mold, by setting a pull rod and a pull bracket to drive the pull rod to push the first adjustment rod and the second adjustment rod, lifts the sealing horizontal plate upward, making it easier to remove the plastic product from the injection mold. This makes the removal of the plastic product simpler and more convenient, effectively improving the work efficiency of demolding, facilitating better demolding operations, and helping people to use it better.

[0004] However, in actual use, after lifting the sealing plate, it needs to be kept lifted to facilitate the removal of plastic products, which wastes manpower and is not very practical. Furthermore, when the pressing bracket and linkage rod drive the push rod and extrusion rod to push the extrusion plate upward to push out the plastic products, it is necessary to simultaneously push the pressing brackets located on both sides of the gantry, which is quite troublesome and makes it difficult to achieve synchronous lifting. This can easily cause uneven force on the extrusion plate, which can easily lead to damage to the plastic products due to uneven force. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides an easy-to-demold injection mold to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an easy-to-demold injection mold, including a base plate, a gantry frame fixedly connected to the top of the base plate, a snap-fit ​​structure provided on the top of the gantry frame, a mold opening mechanism fixedly connected to the inner wall of the gantry frame, an injection mold shell fixedly connected to the top of the base plate, and a lifting mechanism provided on the top of the base plate, wherein the lifting mechanism is located inside the injection mold shell;

[0007] The snap-fit ​​structure includes two snap-fit ​​posts symmetrically arranged on the top of the gantry frame. A connecting frame is slidably connected between the two snap-fit ​​posts. Each of the two snap-fit ​​posts has multiple slots on the side near the connecting frame. Two first brackets are fixedly connected to the surface of the connecting frame. A through groove is opened on the surface of the connecting frame, and the through groove is located at the bottom of the first bracket. A lifting rod is inserted into the top of the connecting frame. A spring is fixedly connected to the surface of the lifting rod, and the two ends of the spring are detachably connected to the bottom of the connecting frame by nuts. Two second brackets are fixedly connected to the surface of the lifting rod. An L-shaped locking rod is provided between each second bracket and the first bracket. The L-shaped locking rod is rotatably connected to both the first and second brackets. A locking strip is fixedly connected to the bottom of the L-shaped locking rod, and the locking strip is located inside the through groove. The locking strip and the slot are compatible.

[0008] In order to enable the lower template to be lifted synchronously and rise evenly, preferably, the lifting mechanism includes a cylinder set on the top of the base plate, a pressure reducing column is provided at the output end of the cylinder, a buffer strip is provided at the top of the pressure reducing column, and the lower template is fixedly connected to the top of the buffer strip;

[0009] The bottom plate is provided with two guide posts at the top, and guide strips are inserted into the top of each guide post. The two guide strips are fixedly connected to the lower template.

[0010] To ensure greater stability during the upward movement of the upper template, preferably, the bottom of the gantry frame is provided with an upper template, and multiple fixed columns are provided between the gantry frame and the upper template. The bottom of the multiple fixed columns is fixedly connected to the upper template, and the top is inserted into the gantry frame.

[0011] The lower template is slidably connected to the inner wall of the injection mold shell, and the upper template is slidably connected to the inner wall of the injection mold shell, with the upper template positioned on top of the lower template.

[0012] In order for the upper template to rise smoothly, preferably, the mold opening mechanism includes multiple third supports and fourth supports respectively set at the bottom of the gantry and the top of the lower template, and two fifth supports set at the bottom of the lifting rod. Each fifth support has a T-shaped rod rotatably set at one end, and multiple first connecting rods are rotatably set between the two ends of the T-shaped rod and the third support. Multiple second connecting rods are rotatably set between the two ends of the T-shaped rod and the fourth support.

[0013] To prevent the T-shaped rod from rotating excessively and causing the lower template to descend, preferably, a limiting spring is sleeved on the surface of the lifting rod, and the bottom and top of the limiting spring are fixedly connected to the surface of the lifting rod and the bottom of the gantry frame, respectively.

[0014] To facilitate inspection and observation of the lifting mechanism, preferably, inspection windows are hinged on both sides of the injection mold shell, and the inspection windows are made of transparent glass.

[0015] In order for the device to operate smoothly, preferably, multiple support columns are evenly arranged at the bottom of the base plate;

[0016] The top of the lifting rod is equipped with a handle.

[0017] The technical effects and advantages of this utility model are as follows:

[0018] 1. By setting a snap-fit ​​structure, compared with the existing technology, when the plastic cools down, the lifting rod is pulled up, the upper template is separated from the injection mold shell, and the spring sheet will undergo elastic deformation due to the weight of the connecting frame and its own inertia, which will change the relative position of the lifting rod and the connecting frame. The L-shaped locking rod will rotate counterclockwise by a certain angle with the second bracket as the center, so that the end of the locking strip fixed to it moves out of the locking groove, thus releasing the fixation of the upper template.

[0019] Then the lifting rod continues to move upward. When the upper template reaches the appropriate height, the lifting rod stops moving upward. At this time, the locking strip recovers the weight of the lifting rod, causing the spring to return to its original shape. The relative position of the lifting rod and the connecting frame changes, which in turn causes the end of the locking strip to re-enter the slot and fix the position of the lifting rod at this time.

[0020] It eliminates the need to constantly lift the upper template, easily fixing and moving its position, making it convenient to remove cooled plastic products.

[0021] 2. By setting up a lifting mechanism, compared with the existing technology, after the upper template is fixed in place, the cylinder is activated, which pushes the pressure reducing column and buffer strip to rise. With the assistance of the guide strip and guide column, the lower template rises smoothly, and the lower template pushes out the plastic product, completing the removal operation of the plastic product.

[0022] The entire process saves manpower, increases automation, and allows the lower mold to be lifted synchronously, resulting in more even force distribution on the lower mold and preventing damage to plastic products due to uneven force distribution. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0024] Figure 2 This is a schematic diagram of the overall injection molding shell structure of this utility model.

[0025] Figure 3 This is a schematic diagram of the snap-fit ​​mechanism of this utility model.

[0026] Figure 4 This is a cross-sectional structural diagram of the snap-fit ​​mechanism of this utility model.

[0027] Figure 5 This is a schematic diagram of the mold opening mechanism of this utility model.

[0028] Figure 6 This is a schematic diagram of the lifting mechanism of this utility model.

[0029] The attached diagram is labeled as follows: 1. Base plate; 2. Gantry frame; 3. Injection mold shell; 4. Clip-on column; 5. Connecting frame; 6. Slot; 7. First bracket; 8. Through slot; 9. Lifting rod; 10. Spring piece; 11. Second bracket; 12. L-shaped clip; 13. Clip strip; 14. Cylinder; 15. Pressure relief column; 16. Buffer strip; 17. Lower template; 18. Guide column; 19. Guide strip; 20. Upper template; 21. Fixed column; 22. Third bracket; 23. Fourth bracket; 24. Fifth bracket; 25. T-shaped rod; 26. First connecting rod; 27. Second connecting rod; 28. Limiting spring; 29. ​​Inspection window; 30. Support column; 31. Handle. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] As attached Figure 1-6 The injection mold shown includes a base plate 1, a gantry frame 2 fixedly connected to the top of the base plate 1, a snap-fit ​​structure provided on the top of the gantry frame 2, a mold opening mechanism fixedly connected to the inner wall of the gantry frame 2, an injection mold shell 3 fixedly connected to the top of the base plate 1, and a lifting mechanism provided on the top of the base plate 1, and the lifting mechanism is located inside the injection mold shell 3.

[0032] The snap-fit ​​structure includes two snap-fit ​​posts 4 symmetrically arranged on the top of the gantry frame 2. A connecting frame 5 is slidably connected between the two snap-fit ​​posts 4. Multiple slots 6 are provided on the side of each snap-fit ​​post 4 near the connecting frame 5. Two first brackets 7 are fixedly connected to the surface of the connecting frame 5. A through groove 8 is opened on the surface of the connecting frame 5 and is located at the bottom of the first bracket 7. A lifting rod 9 is inserted into the top of the connecting frame 5. A spring piece 10 is fixedly connected to the surface of the lifting rod 9, and the two ends of the spring piece 10 are detachably connected to the bottom of the connecting frame 5 by nuts. Two second brackets 11 are fixedly connected to the surface of the lifting rod 9. An L-shaped locking rod 12 is provided between each second bracket 11 and the first bracket 7. The L-shaped locking rod 12 is rotatably connected to both the first bracket 7 and the second bracket 11. A locking strip 13 is fixedly connected to the bottom of the L-shaped locking rod 12 and is located inside the through groove 8. The locking strip 13 and the slot 6 are compatible.

[0033] The bottom of the gantry frame 2 is provided with an upper template 20. Multiple fixed columns 21 are provided between the gantry frame 2 and the upper template 20. The bottom of the multiple fixed columns 21 is fixedly connected to the upper template 20, and the top is inserted into the gantry frame 2.

[0034] The lower template 17 is slidably connected to the inner wall of the injection mold shell 3, and the upper template 20 is slidably connected to the inner wall of the injection mold shell 3, and the upper template 20 is set on top of the lower template 17;

[0035] Both sides of the injection mold shell 3 are hinged with inspection windows 29, and the inspection windows 29 are made of transparent glass.

[0036] Multiple support columns 30 are evenly arranged at the bottom of the base plate 1;

[0037] A handle 31 is provided at the top of the lifting rod 9.

[0038] The above operations easily fix the upper template at position 20, making it convenient to remove the cooled plastic product.

[0039] Specifically, after the plastic cools down, the handle 31 is pulled, thereby lifting the lifting rod 9. The upper template 20 is separated from the injection mold shell 3. The spring piece 10 will undergo elastic deformation due to the weight of the connecting frame 5 and its own inertia, causing the relative position of the lifting rod 9 and the connecting frame 5 to change. The L-shaped locking rod 12 will rotate counterclockwise by a certain angle around the second bracket 11, causing the end of the locking strip 13 fixedly connected to it to move out of the locking groove 6, thus releasing the upper template 20 from the fixation.

[0040] Then the lifting rod 9 continues to move upward. When the upper template 20 reaches the appropriate height, the lifting rod 9 stops moving upward. At this time, the locking strip 13 is subjected to the gravity of the lifting rod 9, causing the spring piece 10 to return to its original shape. The relative position of the lifting rod 9 and the connecting frame 5 changes, which causes the end of the locking strip 13 to re-enter the slot 6, fixing the position of the lifting rod 9 at this time. This easily achieves the fixation of the position of the upper template 20, making it convenient to take out the cooled plastic products.

[0041] In a specific embodiment, as shown in the appendix Figure 2 , 6 As shown, the lifting mechanism includes a cylinder 14 set on the top of the base plate 1, a pressure reducing column 15 is set at the output end of the cylinder 14, a buffer strip 16 is set on the top of the pressure reducing column 15, and a lower template 17 is fixedly connected to the top of the buffer strip 16.

[0042] Two guide posts 18 are provided on the top of the base plate 1, and guide strips 19 are inserted into the top of each guide post 18. The two guide strips 19 are fixedly connected to the lower template 17.

[0043] Through the above operations, the lower template 17 can slide more smoothly on the inner wall of the injection mold shell 3, the mold is subjected to more uniform force, and the molded plastic products are prevented from being damaged due to uneven force.

[0044] Specifically, the cylinder 14 is activated, which pushes the pressure reducing column 15 and the buffer strip 16 to rise, so that the lower template 17 rises smoothly with the assistance of the guide strip 19 and the guide column 18. The lower template 17 pushes out the plastic product, completing the removal operation of the plastic product.

[0045] In a specific embodiment, as shown in the appendix Figure 1 , 5 As shown, the mold opening mechanism includes multiple third supports 22 and fourth supports 23 respectively set at the bottom of the gantry frame 2 and the top of the lower template 17, and two fifth supports 24 set at the bottom of the lifting rod 9. Each fifth support 24 has a T-shaped rod 25 rotatably set at one end, multiple first connecting rods 26 rotatably set between the two ends of the T-shaped rod 25 and the third support 22, and multiple second connecting rods 27 rotatably set between the two ends of the T-shaped rod 25 and the fourth support 23.

[0046] A limiting spring 28 is sleeved on the surface of the lifting rod 9, and the bottom and top of the limiting spring 28 are fixedly connected to the surface of the lifting rod 9 and the bottom of the gantry frame 2, respectively.

[0047] By performing the above operations, the upper template 20 can be raised smoothly.

[0048] Specifically, when the lifting rod 9 is lifted, the two fifth supports 24 rise under the restriction of the limiting spring 28, which in turn drives the T-shaped rod 25 to move, which in turn causes the first connecting rod 26 and the second connecting rod 27 to move. The movement of the first connecting rod 26 and the second connecting rod 27 causes the fourth support 23 to move, and the movement of the fourth support 23 ultimately drives the lower template 20 to move upward.

[0049] The working principle of this utility model is as follows: First, after determining the positions of the upper template 20 and the lower template 17, the raw material to be injected is injected into the injection mold shell 3 (the sandwich between the upper template 20 and the lower template 17). After the raw material cools down, the handle 31 is pulled to lift the lifting rod 9. The upper template 20 is separated from the injection mold shell 3. The spring piece 10 will undergo elastic deformation due to the weight of the connecting frame 5 and its own inertia, which will cause the relative position of the lifting rod 9 and the connecting frame 5 to change. The L-shaped clamping rod 12 will rotate counterclockwise by a certain angle around the second bracket 11, so that the end of the clamping strip 13 fixedly connected to it will move out of the clamping groove 6, thus releasing the pressing and fixing of the upper template 20.

[0050] At the same time, under the restriction of the limiting spring 28, the positions of the two fifth brackets 24 are raised, which in turn drives the T-shaped rod 25 to move, which in turn causes the first connecting rod 26 and the second connecting rod 27 to move. The movement of the first connecting rod 26 and the second connecting rod 27 causes the fourth bracket 23 to move, and the movement of the fourth bracket 23 ultimately drives the lower template 17 to move upward.

[0051] Then the lifting rod 9 continues to move upward, and the upper template 20 moves upward with the assistance of the fixed column 21. When the upper template 20 reaches the appropriate height, the lifting rod 9 stops moving upward. At this time, the locking strip 13 is subjected to the gravity of the lifting rod 9, which causes the spring piece 10 to return to its original shape. The relative position of the lifting rod 9 and the connecting frame 5 changes, which causes the end of the locking strip 13 to re-enter the slot 6 and fix the position of the lifting rod 9 at this time. The position of the upper template 20 is easily fixed. It is not necessary to lift the upper template 20 all the time. The position of the upper template 20 is easily fixed and moved, which makes it convenient to take out the cooled plastic products.

[0052] After the upper template 20 is fixed in position, the cylinder 14 is activated, which pushes the pressure reducing column 15 and the buffer strip 16 to rise. With the assistance of the guide strip 19 and the guide column 18, the lower template 17 rises smoothly and pushes out the plastic product, making it easier to remove the plastic product. The whole process saves manpower and improves the degree of automation. It also makes the lower template 17 easily achieve synchronous lifting, making the lower template 17 slide more smoothly on the inner wall of the injection mold shell 3. The lower template 17 is subjected to more uniform force, preventing the molded plastic product from being damaged due to uneven force.

[0053] When the device is working, the operation of the lifting mechanism can be observed through the inspection window 29. When the lifting mechanism is damaged, the inspection window 29 can also be opened for repair.

[0054] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An easy-to-demold injection mold, comprising a base plate (1), characterized in that: The top of the base plate (1) is fixedly connected to a gantry frame (2), the top of the gantry frame (2) is provided with a snap-fit ​​structure, the inner wall of the gantry frame (2) is fixedly connected to a mold opening mechanism, the top of the base plate (1) is fixedly connected to an injection mold shell (3), the top of the base plate (1) is provided with a lifting mechanism, and the lifting mechanism is located inside the injection mold shell (3); The snap-fit ​​structure includes two snap-fit ​​posts (4) symmetrically arranged on the top of the gantry frame (2). A connecting frame (5) is slidably connected between the two snap-fit ​​posts (4). Each of the two snap-fit ​​posts (4) has multiple snap-fit ​​slots (6) on the side near the connecting frame (5). Two first brackets (7) are fixedly connected to the surface of the connecting frame (5). A through groove (8) is opened on the surface of the connecting frame (5), and the through groove (8) is located at the bottom of the first bracket (7). A lifting rod (9) is inserted into the top of the connecting frame (5), and a spring is fixedly connected to the surface of the lifting rod (9). (10), and the two ends of the spring piece (10) are detachably connected to the bottom of the connecting frame (5) by nuts. Two second brackets (11) are fixedly connected to the surface of the lifting rod (9). Each second bracket (11) is provided with an L-shaped locking rod (12) between it and the first bracket (7). The L-shaped locking rod (12) is rotatably connected to the first bracket (7) and the second bracket (11). The bottom of the L-shaped locking rod (12) is fixedly connected with a locking strip (13). The locking strip (13) is set inside the through groove (8). The locking strip (13) and the locking groove (6) are compatible.

2. The easy-to-demold injection mold according to claim 1, characterized in that: The lifting mechanism includes a cylinder (14) set on the top of the base plate (1), a pressure reducing column (15) is provided at the output end of the cylinder (14), a buffer strip (16) is provided on the top of the pressure reducing column (15), and a lower template (17) is fixedly connected to the top of the buffer strip (16). The bottom plate (1) is provided with two guide posts (18) at the top, and guide strips (19) are inserted into the top of the two guide posts (18). The two guide strips (19) are fixedly connected to the lower template (17).

3. The easy-to-demold injection mold according to claim 2, characterized in that: The bottom of the gantry (2) is provided with an upper template (20), and multiple fixed columns (21) are provided between the gantry (2) and the upper template (20). The bottom of the multiple fixed columns (21) is fixedly connected to the upper template (20), and the top is inserted into the gantry (2). The lower template (17) is slidably connected to the inner wall of the injection mold shell (3), and the upper template (20) is slidably connected to the inner wall of the injection mold shell (3), and the upper template (20) is set on top of the lower template (17).

4. The easy-to-demold injection mold according to claim 1, characterized in that: The mold opening mechanism includes multiple third supports (22) and fourth supports (23) respectively set at the bottom of the gantry (2) and the top of the lower template (17), and two fifth supports (24) set at the bottom of the lifting rod (9). Each fifth support (24) has a T-shaped rod (25) rotatably set at one end. Multiple first connecting rods (26) are rotatably set between the two ends of the T-shaped rod (25) and the third support (22). Multiple second connecting rods (27) are rotatably set between the two ends of the T-shaped rod (25) and the fourth support (23).

5. The easy-to-demold injection mold according to claim 1, characterized in that: A limiting spring (28) is sleeved on the surface of the lifting rod (9), and the bottom and top of the limiting spring (28) are fixedly connected to the surface of the lifting rod (9) and the bottom of the gantry frame (2), respectively.

6. The easy-to-demold injection mold according to claim 1, characterized in that: The injection mold shell (3) has inspection windows (29) hinged on both sides, and the inspection windows (29) are made of transparent glass.

7. The easy-to-demold injection mold according to claim 1, characterized in that: The bottom of the base plate (1) is evenly provided with multiple support columns (30); The top of the lifting rod (9) is provided with a handle (31).

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