Mold locking mechanism of injection molding machine
The combined structure of the middle plate, tail plate and brake assembly solves the problems of clamping force fluctuation and large space occupation, and improves the clamping accuracy and injection quality.
Patent Information
- Application Number
- CN202422719525.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-11-07
AI Technical Summary
The clamping force provided by the clamping cylinder of the existing injection molding machine is easily affected by pressure and flow fluctuations, resulting in unstable closing effect and large space occupation.
The combined structure of the middle plate, tail plate, coring column, mold adjustment cylinder, clamping cylinder and brake assembly is adopted. The brake assembly is used to lock the brake rod to fix the middle plate and tail plate, reducing the dependence on the clamping cylinder. The tail plate is used to provide clamping force, and the volume is reduced by the hollow cylinder and the one-piece molded clamping cylinder.
The clamping accuracy and rigidity are improved, the uniformity of the clamping force is ensured, the volume of the clamping cylinder and the overall volume of the injection molding machine are reduced, and the injection molding quality and space utilization efficiency are improved.
Smart Images
Figure CN223420013U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a mold locking mechanism of an injection molding machine. Background Art
[0002] Currently, the clamping mechanisms of common injection molding machines typically utilize large hydraulic cylinders for pressurization. However, since the clamping force of this type of clamping mechanism is completely dependent on the clamping cylinder, any fluctuations in the pressure and flow of the clamping cylinder will also cause changes in the clamping force, directly affecting the closing effect between the middle plate and the head plate, and thus the injection molding quality. Furthermore, due to the large size of the hydraulic cylinder, the common clamping mechanism also takes up a lot of space.
[0003] Therefore, how to overcome the above-mentioned defects has become an important issue to be solved urgently by those skilled in the art. Utility Model Content
[0004] The utility model overcomes the deficiencies of the above-mentioned technology and provides a mold locking mechanism for an injection molding machine.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A locking mechanism for an injection molding machine comprises a middle plate 1, a head plate 3 and a tail plate 4 fixed on a frame 2 of the injection molding machine, a plurality of Corinthian columns 5 are connected between the head plate 3 and the tail plate 4, the middle plate 1 is passed through the Corinthian columns 5, and the Corinthian columns 5 are provided with a mold adjustment cylinder 6 for driving the middle plate 1 to move back and forth between the head plate 3 and the tail plate 4, a locking cylinder 7 is fixed on the tail plate 4, the piston rod of the locking cylinder 7 extends toward the middle plate 1, and a brake assembly 8 is fixedly connected to the piston rod of the locking cylinder 7, a brake rod 9 is provided on the middle plate 1 extending toward the tail plate 4 and passing through the brake assembly 8 and the tail plate 4, the brake assembly 8 can lock the brake rod 9 and move fixedly and synchronously with it, and the brake assembly 8 can also release the brake rod 9 and disengage from it.
[0007] Preferably, the brake assembly 8 includes two limit sliders 81 fixed to the left and right ends of the piston rod of the clamping cylinder 7, and a slide rail 82 extending up and down is formed between the two limit sliders 81. The slide rail 82 is limitedly connected with an upper gate plate 83 and a lower gate plate 84 distributed up and down and capable of moving up and down along the slide rail respectively. The brake rod 9 passes between the upper and lower gate plates, and the upper gate plate 83 and the lower gate plate 84 approach each other to clamp the brake rod 9, and move away from each other to release the brake rod 9.
[0008] Preferably, the lower gate plate 84 is provided with a plurality of light rods 85 extending upward and passing through the upper gate plate 83, and the top ends of all the light rods 85 are fixedly connected to a fixed plate 86, and a brake cylinder 87 is fixed on the fixed plate 86. The piston rod of the brake cylinder 87 passes downward through the fixed plate 86 and is fixedly connected to the upper gate plate 83.
[0009] Preferably, the upper gate plate 83 and the lower gate plate 84 are respectively provided with a serrated groove 88 on the surface facing the brake lever 9 , and the brake lever 9 is also provided with a serrated segment 91 capable of engaging with the serrated groove 88 .
[0010] Preferably, the brake lever 9 is further provided with a knife-back groove section 92 , and the knife-back groove section 92 is located in front of the end of the serrated section 91 close to the middle plate 1 .
[0011] Preferably, the mold locking cylinder 7 is a hollow cylinder arranged in the tail plate 4 , and the brake rod 9 also passes through the mold locking cylinder 7 .
[0012] Preferably, the clamping cylinder 7 and the tail plate 4 are integrally formed.
[0013] Preferably, an ejection assembly 10 is further provided between the brake rod 9 and the middle plate 1 .
[0014] Preferably, the ejection assembly 10 includes an ejection flange 101, one end of the ejection flange 101 is fixedly connected to the middle plate 1, and the other end is fixedly connected to the brake rod 9. The end surface of the brake rod 9 close to the ejection flange 101 is inwardly recessed to form a hydraulic chamber 102, and an ejection push rod 103 extending toward the middle plate 1 is provided in the hydraulic chamber 102. The ejection flange 101, the hydraulic chamber 102 and the ejection push rod 103 are combined to form an ejection cylinder, and the ejection push rod 103 is the piston rod of the ejection cylinder. The end of the ejection push rod 103 close to the middle plate 1 is connected to an ejection base plate 104 that can move closer to / away from the middle plate 1 with the ejection push rod 103, and the ejection base plate 104 is provided with a plurality of ejector pins 105 extending toward the middle plate 1, and the middle plate 1 is provided with air avoidance holes 106 corresponding to the positions of the ejector pins 105.
[0015] Compared with the prior art, the beneficial effects of the present invention are:
[0016] 1. The clamping mechanism in this case works together by combining the brake rod, brake assembly, and clamping cylinder between the middle plate and tail plate to connect and secure the middle plate and tail plate together. This allows the tail plate to provide a certain clamping force for the middle plate, thus reducing the performance requirements for the clamping cylinder. Compared with traditional clamping structures that use large cylinders for pressurization, this can greatly reduce the volume of the clamping cylinder, thereby reducing the overall size of the injection molding machine. In addition, after the mold adjustment cylinder drives the middle plate into position, the clamping mechanism in this case first locks the brake rod through the brake assembly to fix the middle plate. This can effectively improve the clamping accuracy and rigidity. It also ensures that when the pressure and flow of the mold adjustment cylinder fluctuate, the structural strength of each component can maintain the uniformity of the clamping force, thereby effectively improving the injection molding quality.
[0017] 2. The clamping mechanism of this case is also equipped with an ejector assembly between the brake rod and the middle plate for ejecting the mold after injection molding is completed. This makes the structure of the ejector assembly and the brake assembly more compact, thereby more efficiently utilizing the space inside the injection molding machine and further reducing the space occupied by the entire injection molding machine. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the clamping mechanism in this case.
[0019] Figure 2 It is a cross-sectional schematic diagram of the clamping mechanism in this case.
[0020] Figure 3 This is a schematic diagram of the brake assembly in this case.
[0021] Figure 4 It is a cross-sectional schematic diagram of the ejection assembly in this case. DETAILED DESCRIPTION
[0022] The following examples further illustrate the features of the present invention and other related features to facilitate understanding by those skilled in the art:
[0023] like Figures 1 to 4 As shown, a locking mechanism of an injection molding machine includes a middle plate 1, a head plate 3 and a tail plate 4 fixed on a frame 2 of the injection molding machine, a plurality of Corinthian columns 5 are connected between the head plate 3 and the tail plate 4, the middle plate 1 is passed through the Corinthian columns 5, and the Corinthian columns 5 are provided with a mold adjustment cylinder 6 for driving the middle plate 1 to move back and forth between the head plate 3 and the tail plate 4, a locking cylinder 7 is fixed on the tail plate 4, the piston rod of the locking cylinder 7 extends toward the middle plate 1, and a brake assembly 8 is fixedly connected to the piston rod of the locking cylinder 7, and a brake rod 9 is provided on the middle plate 1 extending toward the tail plate 4 and passing through the brake assembly 8 and the tail plate 4, the brake assembly 8 can lock the brake rod 9 and move synchronously with it, and the brake assembly 8 can also release the brake rod 9 and disengage from it.
[0024] As described above, the mold locking mechanism of the case is provided with the brake lever 9 extending to the tail plate 4 and passing through the tail plate 4 on the middle plate 1, and the locking oil cylinder 7 is fixed on the tail plate 4, and the brake assembly 8 is fixed on the piston rod of the locking oil cylinder 7, and the brake lever 9 also passes through the brake assembly 8. Thus, after the adjusting oil cylinder 6 drives the middle plate 1 to move to the head plate 3, the brake assembly 8 can be controlled to act to lock the brake lever 9, so that the middle plate 1 and the tail plate 4 are connected as a whole through the brake lever 9, the brake assembly 8 and the locking oil cylinder 7, so that the tail plate 4 fixed on the injection molding machine frame 2 can provide a certain locking force for the middle plate 1, and then the locking oil cylinder 7 is controlled to act to continue to apply pressure to the brake lever 9 to further provide locking force for the middle plate 1 to complete the locking action. The mold locking mechanism of the case can connect the middle plate 1 and the tail plate 4 as a whole through the brake lever 9, the brake assembly 8 and the locking oil cylinder 7 between the middle plate 1 and the tail plate 4, so that the tail plate 4 can provide a certain locking force for the middle plate 1, thereby reducing the performance requirements of the locking oil cylinder 7, and compared with the traditional locking structure through large oil cylinder for pressure boosting, the volume of the locking oil cylinder 7 can be greatly reduced, thereby reducing the overall volume of the injection molding machine. In addition, after the adjusting oil cylinder 6 drives the middle plate 1 to move to the position, the brake assembly 8 first locks the brake lever 9 to lock the middle plate 1, which can effectively improve the locking precision and stiffness, and can also ensure that when the pressure and flow of the adjusting oil cylinder 6 fluctuate, the uniformity of the locking force can be maintained through the structural strength of each part, thereby effectively improving the injection quality.
[0025] As Figures 1 to 3 shown, preferably, the brake assembly 8 includes two limit blocks 81 fixed on the left and right of the end of the piston rod of the locking oil cylinder 7, and a slide rail 82 extending upward and downward is formed between the two limit blocks 81, and an upper brake plate 83 and a lower brake plate 84 distributed upward and downward and capable of moving upward and downward along the slide rail respectively are limitally connected in the slide rail 82, and the brake lever 9 passes between the upper brake plate 83 and the lower brake plate 84, and the upper brake plate 83 and the lower brake plate 84 are close to each other to clamp the brake lever 9 and are away from each other to release the brake lever 9.
[0026] As described above, the upper brake plate 83 and the lower brake plate 84 of the brake assembly 8 of the case are limitally connected in the slide rail 82 to move upward and downward, and the slide rail 82 is combined by the limit blocks 81 fixed on the end of the piston rod of the locking oil cylinder 7, so that the upper brake plate 83 and the lower brake plate 84 can move synchronously with the piston rod of the locking oil cylinder 7. At the same time, the brake lever 9 passes between the upper brake plate 83 and the lower brake plate 84, and the lower brake plate 84 is connected with a fixed plate 86 and a brake oil cylinder 87 through a light rod 85, and the upper brake plate 83 is arranged on the light rod 85 and connected with the piston rod of the brake oil cylinder 87, so that when the brake oil cylinder 87 acts, the upper brake plate 83 and the lower brake plate 84 can be driven to approach / away from each other, thereby controlling the upper brake plate and the lower brake plate to lock / release the brake lever 9.
[0027] like Figures 1 to 3 As shown, preferably, the lower gate plate 84 is provided with a plurality of light rods 85 extending upward and passing through the upper gate plate 83, and the top ends of all the light rods 85 are fixedly connected to a fixed plate 86, and a brake cylinder 87 is fixed on the fixed plate 86. The piston rod of the brake cylinder 87 passes downward through the fixed plate 86 and is fixedly connected to the upper gate plate 83. In this way, the upper gate plate 83 can be driven to move along the light rods 85 and thus approach / move away from the lower gate plate 84 through the action of the brake cylinder 87.
[0028] like Figures 1 to 3 As shown, preferably, the upper gate plate 83 and the lower gate plate 84 are respectively provided with a serrated groove 88 on the surface facing the brake rod 9, and the brake rod 9 is also provided with a serrated segment 91 that can engage with the serrated groove 88. In this way, when the upper gate plate 83 and the lower gate plate 84 are brought close to each other to lock the brake rod 9, the serrated groove 88 and the serrated segment 91 will also engage with each other, which can ensure that there is no relative sliding between the upper and lower gate plates and the brake rod 9, thereby improving the reliability of the brake.
[0029] like Figures 1 to 3 As shown, preferably, a back-off groove section 92 is further provided on the brake rod 9, and the back-off groove section 92 is located in front of the end of the serrated section 91 close to the middle plate 1. In this way, when the moving stroke of the middle plate 1 is short, the back-off groove section 92 is provided at the front end of the serrated section 91 to avoid interference between the serrated groove 88 and the position of the non-serrated section 91 of the brake rod 9.
[0030] like Figures 1 to 3 As shown, preferably, the clamping cylinder 7 is a hollow cylinder arranged in the tail plate 4, and the brake rod 9 also passes through the clamping cylinder 7. In this way, the clamping cylinder 7 is arranged in the tail plate 4, which can effectively reduce the volume increased by the clamping cylinder 7. At the same time, using a hollow cylinder as the clamping cylinder 7 can make the driving force applied by the clamping cylinder 7 to the brake rod 9 and the moving direction of the brake rod 9 located on the same axis, so that the force on the brake rod 9 is more uniform, thereby improving the uniformity of the clamping force.
[0031] like Figures 1 to 3 As shown, preferably, the clamping cylinder 7 and the tail plate 4 are integrally formed, so that the volume occupied by the clamping cylinder 7 can be further reduced, and the connection stability between the clamping cylinder 7 and the tail plate 4 can also be made more reliable.
[0032] like Figure 1 、 Figure 2 、 Figure 4 As shown, preferably, an ejection assembly 10 is further provided between the brake rod 9 and the middle plate 1 .
[0033] As described above, the clamping mechanism of this case is further provided with an ejector assembly 10 between the brake rod 9 and the middle plate 1 for ejecting the mold after the injection molding is completed. In this way, the structure of the ejector assembly 10 and the brake assembly 8 can be made more compact, thereby more efficiently utilizing the space inside the injection molding machine and further reducing the space occupied by the entire injection molding machine.
[0034] like Figure 1 、 Figure 2 、 Figure 4 As shown, preferably, the ejection assembly 10 includes an ejection flange 101, one end of the ejection flange 101 is fixedly connected to the middle plate 1, and the other end is fixedly connected to the brake rod 9. The end surface of the brake rod 9 close to the ejection flange 101 is inwardly recessed to form a hydraulic chamber 102, and an ejection push rod 103 extending toward the middle plate 1 is provided in the hydraulic chamber 102. The ejection flange 101, the hydraulic chamber 102 and the ejection push rod 103 are combined to form an ejection cylinder, and the ejection push rod 103 is the piston rod of the ejection cylinder. The ejection push rod 103 is connected to an ejection base plate 104 that can move closer to / away from the middle plate 1 with the ejection push rod 103 at one end close to the middle plate 1, and the ejection base plate 104 is provided with a plurality of ejector pins 105 extending toward the middle plate 1, and the middle plate 1 is provided with avoidance holes 106 corresponding to the positions of the ejector pins 105.
[0035] As described above, the ejection assembly 10 in this case is formed into an ejection cylinder by combining the ejection flange 101, the hydraulic chamber 102 and the ejection push rod 103, and the ejection push rod 103 serves as the piston rod of the ejection cylinder. At the same time, the end of the ejection push rod 103 is connected to the ejection base plate 104, and a plurality of ejector pins 105 are connected to the ejector base plate 104. In this way, the ejector pins 105 can be driven through the air avoidance hole 106 to be ejected or retracted through the action of the ejection cylinder, thereby realizing the ejection function.
[0036] Specifically, the end of the brake rod 9 and the ejector flange 101 are both provided with oil passages connected to the hydraulic chamber 102 , so that an external common device can supply oil to the hydraulic chamber 102 to hydraulically drive the ejector push rod 103 to move back and forth.
[0037] Specifically, the middle plate 1 is provided with a guide groove or a guide column for the ejection base plate 104 to be connected thereto and move back and forth.
[0038] As mentioned above, this case protects a locking mechanism of an injection molding machine. All technical solutions that are identical or similar to those in this case should be deemed to fall within the scope of protection of this case.
Claims
1. A clamping mechanism for an injection molding machine, characterized in that The invention comprises a middle plate (1), a head plate (3) and a tail plate (4) fixed on an injection molding machine frame (2), a plurality of Corinthian columns (5) are connected between the head plate (3) and the tail plate (4), the middle plate (1) is passed through the Corinthian columns (5), the Corinthian columns (5) are provided with a mold adjustment cylinder (6) for driving the middle plate (1) to move back and forth between the head plate (3) and the tail plate (4), a mold locking cylinder (7) is fixed on the tail plate (4), and the mold locking cylinder (7) is provided on the tail plate (4). The piston rod of the oil cylinder (7) extends toward the middle plate (1); a brake assembly (8) is fixedly connected to the piston rod of the clamping oil cylinder (7); a brake rod (9) is provided on the middle plate (1) and extends toward the tail plate (4) and passes through the brake assembly (8) and the tail plate (4); the brake assembly (8) can lock the brake rod (9) and move synchronously with the tail plate; and the brake assembly (8) can also release the brake rod (9) and disengage from the tail plate.
2. The mold clamping mechanism of an injection molding machine according to claim 1, characterized in that The brake assembly (8) includes two limit sliders (81) fixed to the left and right ends of the piston rod of the clamping cylinder (7), a slide rail (82) extending up and down is formed between the two limit sliders (81), and an upper gate plate (83) and a lower gate plate (84) are connected to the slide rail (82) and can move up and down respectively along the slide rail. The brake rod (9) passes through between the upper and lower gate plates, and the upper gate plate (83) and the lower gate plate (84) approach each other to clamp the brake rod (9) and move away from each other to release the brake rod (9).
3. The mold clamping mechanism of an injection molding machine according to claim 2, characterized in that The lower gate plate (84) is provided with a plurality of polished rods (85) extending upward and passing through the upper gate plate (83), and the top ends of all the polished rods (85) are fixedly connected to a fixed plate (86), and a brake cylinder (87) is fixed on the fixed plate (86), and the piston rod of the brake cylinder (87) passes downward through the fixed plate (86) and is fixedly connected to the upper gate plate (83).
4. The mold clamping mechanism of an injection molding machine according to claim 2, characterized in that The upper gate plate (83) and the lower gate plate (84) are respectively provided with a sawtooth groove (88) on the surface facing the brake lever (9), and the brake lever (9) is also provided with a sawtooth segment (91) capable of engaging with the sawtooth groove (88).
5. The mold clamping mechanism of an injection molding machine according to claim 4, characterized in that The brake lever (9) is also provided with a knife-back groove section (92), and the knife-back groove section (92) is located in front of the end of the sawtooth section (91) close to the middle plate (1).
6. The mold clamping mechanism of an injection molding machine according to claim 1, characterized in that The mold locking cylinder (7) is a hollow cylinder arranged in the tail plate (4), and the brake rod (9) also passes through the mold locking cylinder (7).
7. The mold clamping mechanism of an injection molding machine according to claim 6, characterized in that The clamping cylinder (7) and the tail plate (4) are integrally formed.
8. The mold clamping mechanism of an injection molding machine according to claim 1, characterized in that An ejection assembly (10) is also provided between the brake lever (9) and the middle plate (1).
9. The mold clamping mechanism of an injection molding machine according to claim 8, characterized in that The ejection assembly (10) includes an ejection flange (101), one end of the ejection flange (101) is fixedly connected to the middle plate (1), and the other end is fixedly connected to the brake rod (9), the brake rod (9) is recessed inwardly on the end surface close to the ejection flange (101) to form a hydraulic chamber (102), and the hydraulic chamber (102) is provided with an ejection push rod (103) extending toward the middle plate (1), and the ejection flange (101), the hydraulic chamber (102) and the ejection push rod ( 103) are combined to form an ejection oil cylinder, the ejection push rod (103) is a piston rod of the ejection oil cylinder, and the ejection push rod (103) is connected to an ejection base plate (104) on one end close to the middle plate (1) and can move closer to / away from the middle plate (1) along with the ejection push rod (103), and the ejection base plate (104) is provided with a plurality of ejector pins (105) extending toward the middle plate (1), and the middle plate (1) is provided with avoidance holes (106) corresponding to the positions of the ejector pins (105).