Injection mold for plastic product processing

Abstract

The utility model discloses an injection mold for plastic product processing, which relates to the technical field of plastic product processing and comprises a base, support columns are symmetrically and fixedly connected to the upper end of the base close to chamfers, a top plate is fixedly connected to the upper ends of the support columns, a cylinder is mounted at the upper end of the top plate, and the telescopic end of the cylinder extends out of the bottom end of the top plate and is fixedly connected with a lifting plate. The upper end of the base is fixedly connected with an installation base, a lower mold is movably connected into the installation base, a mold groove is formed in the upper end of the lower mold, a demolding assembly is installed at the bottom end in the mold groove, moving blocks are symmetrically and slidably connected to the two ends of the installation base, and positioning assemblies are symmetrically installed at the two ends of the moving blocks. By adopting the structure, the time for replacing the die can be remarkably shortened, so that the overall efficiency of a production line is improved, different production requirements can be met more quickly, the production interruption and waiting time are reduced, and meanwhile, the die can be regularly maintained and maintained conveniently.

Description

Technical Field

[0001] This utility model belongs to the field of plastic product processing, and specifically relates to an injection mold for processing plastic products. Background Technology

[0002] Plastic products are a general term for everyday and industrial goods made primarily from plastic. This includes products manufactured using processes such as injection molding and thermoforming. An injection mold is a tool used to inject molten plastic into a mold cavity, where it cools to obtain the desired plastic product. An injection mold typically consists of two parts: a moving mold and a fixed mold. The moving mold is mounted on the moving platen of the injection molding machine, while the fixed mold is mounted on the fixed platen. During injection molding, the moving and fixed molds close to form a cavity, and the molten plastic is injected into the cavity under high pressure. After cooling, the mold is opened to remove the product.

[0003] Announcement No. "CN219213984U" discloses an injection mold for processing plastic products, relating to the field of injection mold technology. It includes a lower mold, with an upper mold at its top. Limiting rods are installed at the four corners of the lower mold's top, with one end of each limiting rod penetrating the bottom of the upper mold. The upper mold and the limiting rods are slidably connected. A support plate is provided inside the lower mold. Vertical rods are slidably connected to both sides of the lower mold's top. Support rods are installed on both sides of the bottom of the support plate, with crossbars connected to the bottom of the support rods. Springs are installed on both sides of the bottom of the crossbars, with the bottom of the springs connected to the inner bottom of the lower mold. The bottom of the vertical rods is connected to the top of the crossbars. A sealing plate is installed at the bottom of the upper mold. This design effectively prevents the molded workpiece from getting stuck in the lower mold, improving demolding efficiency and possessing high practical value.

[0004] Although the above-mentioned utility model can effectively prevent the workpiece after molding from getting stuck in the lower mold and improve the demolding efficiency, it has high practical value. However, when fixing the lower mold, it is necessary to fit the fixing plate with the mounting surface and then fix it with bolts. This method requires precise hole alignment and tightening operations, which increases the complexity of assembly. Moreover, it makes mold replacement relatively complicated and time-consuming, reducing the flexibility of the production line. In scenarios where it is necessary to quickly change molds to produce different products, it cannot meet the production needs. Utility Model Content

[0005] In view of the problems mentioned in the background art, the purpose of this utility model is to provide an injection mold for processing plastic products, so as to solve the problem that the use of bolts for fixing requires precise hole alignment and tightening operations, which increases the complexity of assembly and makes mold replacement relatively complicated and time-consuming, reducing the flexibility of the production line. In scenarios where molds need to be changed quickly to produce different products, it cannot meet the production needs.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A plastic product injection mold includes a base, with support columns symmetrically fixedly connected to the upper end of the base near the chamfer. A top plate is fixedly connected to the upper end of the support columns. A cylinder is installed on the upper end of the top plate. The telescopic end of the cylinder extends out of the bottom end of the top plate and is fixedly connected to a lifting plate. A cover plate is threadedly connected to the bottom end of the lifting plate. A mounting seat is fixedly connected to the upper end of the base. A mounting groove is opened on the upper end of the mounting seat. A lower mold is movably connected inside the mounting groove. A mold groove is opened on the upper end of the lower mold. A demolding component is installed at the bottom end of the mold groove. An injection tube is installed at one end of the lower mold. The other end of the injection tube extends out of one end of the mounting seat. Moving blocks are symmetrically slidably connected to both ends of the mounting seat. Positioning components are symmetrically installed at both ends of the moving blocks.

[0008] The positioning assembly includes mounting holes, a second return spring, and a locking pin. Mounting holes are symmetrically formed at both ends of the moving block. A second return spring is fixedly connected to one end of each mounting hole, and a locking pin is fixedly connected to the other end of the second return spring. The locking pin is slidably connected to the mounting hole. The end of the locking pin away from the second return spring extends out of the side of the moving block and is arc-shaped. Slots are symmetrically formed at both ends of the lower mold. The moving block is inserted into the slot. Locking holes are symmetrically formed at both ends of the slot, and the locking holes are snap-fitted to the locking pin. Moving grooves are formed at both ends of the mounting base, communicating with the mounting groove. The moving groove is slidably connected to the moving block. Limiting grooves are symmetrically formed at both ends of the moving groove. Limiting blocks are symmetrically fixedly connected to both ends of the moving block, and the limiting blocks are slidably connected to the limiting groove. This significantly shortens mold changeover time, thereby improving the overall efficiency of the production line. It can also adapt to different production needs more quickly, reducing production interruptions and waiting time. Furthermore, it facilitates regular mold maintenance and repair, helping to extend the mold's service life and reduce downtime caused by mold damage.

[0009] As a preferred technical solution, the demolding assembly includes built-in holes, a first return spring, a movable column, a demolding template, a through hole, and a magnetic column. Built-in holes are symmetrically arranged at the bottom of the mold groove. A first return spring is fixedly connected to the bottom of each built-in hole. A movable column is fixedly connected to the other end of the first return spring, and the movable column is slidably connected to the built-in hole. A demolding template is fixedly connected to the other end of the movable column. A magnetic column is fixedly connected to the bottom of the demolding template. A through hole is provided at the bottom of the mold groove, and the through hole is slidably connected to the magnetic column. An electromagnet is embedded at the bottom of the mounting groove, and the electromagnet is magnetically connected to the magnetic column. This ensures that the plastic product is subjected to uniform force during demolding, avoiding push marks or deformation. It can shorten the injection molding cycle, improve the overall efficiency of the production line, reduce the time for manual intervention, reduce the risk of production interruption, and also reduce mold wear and damage, extending the mold's service life.

[0010] As a preferred technical solution, a guide block is sleeved on the outside of the support column. The guide block and the support column are slidably connected. One end of the guide block is fixedly connected to the lifting plate. The sliding cooperation between the guide block and the support column can limit the displacement of the lifting plate and ensure that the lifting plate always moves along the predetermined path during the lifting process.

[0011] As a preferred technical solution, positioning pins are symmetrically fixedly connected to the bottom end of the cover plate near the chamfer, and positioning holes are symmetrically opened on the upper end of the lower mold near the chamfer. The positioning pins and positioning holes are inserted into each other. The design of the positioning pins and positioning holes can ensure the precise alignment between the lower mold and the cover plate and avoid deviations during the closing process.

[0012] In summary, the present invention has the following main advantages:

[0013] First, in this utility model, the lower mold is placed inside the mounting groove of the mounting base, and then the moving block is pushed. The moving block slides inside the moving groove and inserts into the slot. During the insertion process, the squeezing force applies pressure to the arc-shaped end of the locking column, causing the locking column to press against the second return spring. The second return spring is compressed, and the locking column retracts into the mounting hole. When the locking column moves to the locking hole, the second return spring resets, and the locking column pops out and engages with the locking hole to fix it, thus completing the installation of the lower mold. This can significantly shorten the mold replacement time, thereby improving the overall efficiency of the production line. It can also adapt to different production needs more quickly, reduce production interruptions and waiting time, and facilitate regular maintenance and upkeep of the mold, which helps to extend the service life of the mold and reduce downtime caused by mold damage.

[0014] Secondly, in this invention, when the electromagnet is activated, it connects magnetically with the magnetic column. The magnetic column drives the demolding plate to descend, while the demolding plate simultaneously drives the moving column to slide inside the built-in hole. The moving column presses against the first return spring, which compresses the spring. The material is then injected into the mold cavity through the injection tube. After injection molding and cooling, the electromagnet is deactivated, the magnetic connection between the electromagnet and the magnetic column ends, the first return spring resets, and the moving column rebounds, causing the demolding plate to pop out. The demolding plate ejects the injected material from the mold cavity, ensuring that the plastic product is subjected to uniform force during demolding, avoiding push marks or deformation. This shortens the injection molding cycle, improves the overall efficiency of the production line, reduces manual intervention time, lowers the risk of production interruption, and reduces mold wear and damage, extending the mold's service life. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0016] Figure 2 This is a bottom-view three-dimensional structural diagram of the present invention;

[0017] Figure 3 This is a cross-sectional three-dimensional structural schematic diagram of the present invention;

[0018] Figure 4 This is the utility model Figure 3 Enlarged view of part A;

[0019] Figure 5 This is a cross-sectional three-dimensional structural diagram of the positioning component of this utility model.

[0020] Reference numerals: 1. Base; 2. Mounting seat; 3. Support column; 4. Top plate; 5. Cylinder; 6. Lifting plate; 7. Cover plate; 8. Mounting groove; 9. Lower mold; 10. Mold groove; 11. Injection tube; 12. Demolding assembly; 121. Internal hole; 122. First return spring; 123. Moving column; 124. Demolding plate; 125. Through hole; 126. Magnetic column; 13. Electromagnet; 14. Moving groove; 15. Moving block; 16. Slot; 17. Positioning assembly; 171. Mounting hole; 172. Second return spring; 173. Locking column; 18. Locking hole; 19. Limiting block; 20. Limiting groove; 21. Guide block; 22. Positioning column; 23. Positioning hole. Detailed Implementation

[0021] Example

[0022] refer to Figures 1 to 5 The injection mold for processing plastic products described in this embodiment includes a base 1. Support columns 3 are symmetrically fixedly connected to the upper end of the base 1 near the chamfer. A top plate 4 is fixedly connected to the upper end of the support columns 3. A cylinder 5 is installed on the upper end of the top plate 4. The telescopic end of the cylinder 5 extends out of the bottom end of the top plate 4 and is fixedly connected to a lifting plate 6. A cover plate 7 is threadedly connected to the bottom end of the lifting plate 6. An installation seat 2 is fixedly connected to the upper end of the base 1. An installation groove 8 is opened on the upper end of the installation seat 2. A lower mold 9 is movably connected inside the installation groove 8. A mold groove 10 is opened on the upper end of the lower mold 9. A demolding component 12 is installed at the bottom end inside the mold groove 10. An injection tube 11 is installed at one end of the lower mold 9. The other end of the injection tube 11 extends out of one end of the installation seat 2. Moving blocks 15 are symmetrically slidably connected to both ends of the installation seat 2. Positioning components 17 are symmetrically installed at both ends of the moving blocks 15.

[0023] The positioning assembly 17 includes mounting holes 171, a second return spring 172, and a locking pin 173. The moving block 15 has mounting holes 171 symmetrically arranged at both ends. One end of the mounting hole 171 is fixedly connected to the second return spring 172, and the other end of the second return spring 172 is fixedly connected to the locking pin 173. The locking pin 173 is slidably connected to the mounting hole 171. The end of the locking pin 173 away from the second return spring 172 extends out of the side of the moving block 15 and is arc-shaped. The lower mold 9 has slots 16 symmetrically arranged at both ends. The moving block 15 is inserted into the slots 16. Locking holes 18 are symmetrically arranged at both ends inside the slots 16. The lower mold 9 is placed into the mounting groove 8 of the mounting base 2 and then the moving block 15 is pushed. The moving block 15 slides inside the moving groove 14 and inserts into the slot 16. During the insertion process, the squeezing force applies pressure to the arc-shaped end of the locking pin 173, causing the locking pin 173 to press against the second return spring 172. The second return spring 172 is compressed, and the locking pin 173 retracts into the mounting hole 171. When the locking pin 173 moves to the locking hole 18, the second return spring 172 returns to its original position, and the locking pin 173 pops out and engages with the locking hole 18 to fix it, thus completing the installation of the lower mold 9.

[0024] refer to Figure 5 The mounting base 2 has movable grooves 14 at both ends, which are connected to the mounting groove 8. The movable grooves 14 and the movable block 15 are slidably connected. The movable grooves 14 have symmetrical limit grooves 20 at both ends. The movable block 15 has symmetrical limit blocks 19 fixedly connected at both ends. The limit blocks 19 and the limit grooves 20 are slidably connected. When the movable block 15 is pushed, the movable block 15 slides inside the movable groove 14. At the same time, the movable block 15 drives the limit blocks 19 to slide inside the limit grooves 20.

[0025] refer to Figure 4The demolding assembly 12 includes an internal hole 121, a first return spring 122, a movable column 123, a demolding template 124, a through hole 125, and a magnetic column 126. The mold groove 10 has symmetrically arranged internal holes 121 at its bottom. The first return spring 122 is fixedly connected to the bottom of the internal hole 121. The other end of the first return spring 122 is fixedly connected to the movable column 123, which is slidably connected to the internal hole 121. The other end of the movable column 123 is fixedly connected to the demolding template 124, and the bottom of the demolding template 124 is fixedly connected to the magnetic column 126. The bottom of the mold groove 10 has a through hole 125, which is slidably connected to the magnetic column 126. An electromagnet 1 is embedded in the bottom of the mounting groove 8. 3. The electromagnet 13 and the magnetic column 126 are magnetically connected. When the electromagnet 13 is activated, the electromagnet 13 and the magnetic column 126 are magnetically connected. The magnetic column 126 drives the ejector plate 124 to descend. At the same time, the ejector plate 124 drives the moving column 123 to slide inside the built-in hole 121. The moving column 123 presses against the first return spring 122, and the first return spring 122 is compressed. The material is injected into the mold cavity 10 through the injection tube 11. After the injection is completed and cooled, the electromagnet 13 is turned off. The electromagnet 13 and the magnetic column 126 are no longer magnetically connected. The first return spring 122 is reset. The moving column 123 rebounds and drives the ejector plate 124 to pop out. The ejector plate 124 pushes out the material after injection into the mold cavity 10.

[0026] refer to Figure 1 A guide block 21 is fitted on the outside of the support column 3. The guide block 21 is slidably connected to the support column 3. One end of the guide block 21 is fixedly connected to the lifting plate 6. When the cylinder 5 is started, the lifting plate 6 is controlled to move up and down. The lifting plate 6 drives the guide block 21 to slide on the outside of the support column 3.

[0027] refer to Figures 1 to 2 The bottom of the cover plate 7 is symmetrically fixed with positioning pins 22 near the chamfer. The upper end of the lower mold 9 is symmetrically provided with positioning holes 23 near the chamfer. The positioning pins 22 and the positioning holes 23 are inserted into each other. The cylinder 5 is started to control the lifting plate 6 to drive the cover plate 7 to descend. The bottom end of the cover plate 7 fits with the upper end of the lower mold 9, and the positioning pins 22 are inserted into the positioning holes 23.

[0028] Operating principle and advantages: First, the lower mold 9 is placed inside the mounting slot 8 of the mounting base 2. Then, the moving block 15 is pushed, and it slides inside the moving slot 14. Simultaneously, the moving block 15 inserts into the slot 16. During insertion, the squeezing force applies pressure to the arc-shaped end of the locking pin 173, causing it to press against the second return spring 172. The second return spring 172 is compressed, and the locking pin 173 retracts into the mounting hole 171. When the locking pin 173 moves to the locking hole 18, the second return spring 172 returns to its original position, and the locking pin 173 pops out and engages with the locking hole 18, completing the installation of the lower mold 9. Then, the electromagnet 13 is activated, and it magnetically connects with the magnetic column 126. The magnetic column 126 drives the ejector plate 124 to descend, and at the same time, the ejector plate 124 drives the moving column 123 to slide inside the built-in hole 121. The moving column 123 presses against the first return spring 122, and the first return spring 122 is compressed. The cylinder 5 is activated, and the lifting plate 6 is controlled to drive the cover plate 7 to descend. The bottom end of the cover plate 7 is attached to the upper end of the lower mold 9. The positioning column 22 is inserted into the positioning hole 23. The material is injected into the mold groove 10 through the injection tube 11. After the injection is completed and cooled, the electromagnet 13 is turned off. The electromagnet 13 and the magnetic column 126 are no longer magnetically connected. The first return spring 122 is reset. The moving column 123 rebounds and drives the ejector plate 124 to pop out. The ejector plate 124 pushes out the material after injection into the mold groove 10.

[0029] This invention can significantly shorten the mold changeover time, thereby improving the overall efficiency of the production line. It can also adapt to different production needs more quickly, reduce production interruptions and waiting time, and facilitate regular mold maintenance and upkeep, which helps extend the service life of the mold and reduce downtime caused by mold damage.

Claims

1. An injection mold for processing plastic products, comprising a base (1), characterized in that: The base (1) is symmetrically fixedly connected to support columns (3) near the chamfer at its upper end. A top plate (4) is fixedly connected to the upper end of each support column (3). A cylinder (5) is installed on the upper end of the top plate (4). The telescopic end of the cylinder (5) extends out of the bottom end of the top plate (4) and is fixedly connected to a lifting plate (6). A cover plate (7) is threadedly connected to the bottom end of the lifting plate (6). A mounting seat (2) is fixedly connected to the upper end of the base (1). An mounting groove (8) is provided on the upper end of the mounting seat (2). The mounting groove (8) is movably connected to a lower mold (9). The upper end of the lower mold (9) is provided with a mold groove (10). The bottom end of the mold groove (10) is equipped with a demolding component (12). One end of the lower mold (9) is equipped with an injection tube (11). The other end of the injection tube (11) extends out to one end of the mounting base (2). The two ends of the mounting base (2) are symmetrically slidably connected with moving blocks (15). The two ends of the moving blocks (15) are symmetrically equipped with positioning components (17). The positioning component (17) includes a mounting hole (171), a second return spring (172), and a locking pin (173). The moving block (15) has mounting holes (171) symmetrically opened at both ends. The second return spring (172) is fixedly connected to one end of the mounting hole (171), and the locking pin (173) is fixedly connected to the other end of the second return spring (172). The locking pin (173) is slidably connected to the mounting hole (171). The end of the locking pin (173) away from the second return spring (172) extends out of the side end of the moving block (15) and is arc-shaped.

2. The injection mold for processing plastic products according to claim 1, characterized in that: The lower mold (9) has slots (16) symmetrically opened at both ends. The moving block (15) is inserted into the slot (16). The slot (16) has locking holes (18) symmetrically opened at both ends. The locking holes (18) are engaged with the locking pin (173).

3. The injection mold for processing plastic products according to claim 1, characterized in that: The mounting base (2) has movable grooves (14) at both ends, which are connected to the mounting groove (8). The movable groove (14) and the movable block (15) are slidably connected. The movable groove (14) has symmetrically opened limit grooves (20) at both ends. The movable block (15) has symmetrically fixedly connected limit blocks (19) at both ends. The limit blocks (19) and the limit grooves (20) are slidably connected.

4. The injection mold for processing plastic products according to claim 1, characterized in that: The demolding assembly (12) includes an internal hole (121), a first reset spring (122), a moving column (123), a demolding template (124), a through hole (125), and a magnetic column (126). The internal hole (121) is symmetrically provided at the bottom of the mold groove (10). The first reset spring (122) is fixedly connected to the bottom of the internal hole (121). The moving column (123) is fixedly connected to the other end of the first reset spring (122). The moving column (123) is slidably connected to the internal hole (121). The demolding template (124) is fixedly connected to the other end of the moving column (123). The magnetic column (126) is fixedly connected to the bottom of the demolding template (124). The through hole (125) is provided at the bottom of the mold groove (10). The through hole (125) is slidably connected to the magnetic column (126).

5. The injection mold for processing plastic products according to claim 1, characterized in that: An electromagnet (13) is embedded in the bottom of the mounting groove (8), and the electromagnet (13) is magnetically connected to the magnetic column (126).

6. The injection mold for processing plastic products according to claim 1, characterized in that: A guide block (21) is sleeved on the outside of the support column (3). The guide block (21) is slidably connected to the support column (3). One end of the guide block (21) is fixedly connected to the lifting plate (6).

7. The injection mold for processing plastic products according to claim 1, characterized in that: The bottom end of the cover plate (7) is symmetrically fixed with positioning posts (22) near the chamfer. The upper end of the lower mold (9) is symmetrically provided with positioning holes (23) near the chamfer. The positioning posts (22) and positioning holes (23) are inserted into each other.

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