Mold ejection structure

Abstract

The utility model discloses a mould ejection structure which comprises a driving assembly, an ejection assembly and limiting assemblies, the driving assembly is connected with the ejection assembly and drives the ejection assembly to eject, the limiting assemblies are arranged on the two sides of the ejection assembly, the ejection assembly comprises a first ejection plate and a second ejection plate arranged below the first ejection plate, and the first ejection plate is connected with the second ejection plate. The driving assembly is connected with the first ejector plate, a first ejector pin is arranged on the first ejector plate, a second ejector pin is arranged on the second ejector plate, the second ejector pin penetrates through the first ejector plate, mounting bases are arranged at the two ends of the first ejector plate, locking assemblies are arranged at the two ends of the second ejector plate, and when the ejector assemblies are located below the limiting assembly, the locking assemblies and the mounting bases are locked. And when the ejection assembly moves to the limiting assembly, the locking assembly is separated from the mounting base, and the first ejection plate and the second ejection plate are unlocked. According to the ejection mechanism, two-section ejection can be achieved through one driving assembly, and the occupied space of the ejection mechanism is reduced.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a mold ejection structure. Background Technology

[0002] The ejection structure is a crucial component of mold design. Its primary function is to smoothly remove the plastic product from the mold after it has solidified, using a mechanical device. Ejector pin ejection is the most common method, utilizing ejector pins to push the product out of the mold. Ejector pins are typically connected to an ejector plate and controlled by ejector rods. For some complex products, a single ejection may not be sufficient; therefore, existing technologies employ two ejection steps to achieve product demolding. However, ejection via two separate paths requires two drive units to work with two sets of ejector pins, resulting in a larger space occupied by the ejection mechanism and a larger overall mold size. Utility Model Content

[0003] The purpose of this invention is to solve the technical problem that existing ejection mechanisms occupy too much space.

[0004] To achieve the objectives of this utility model, the following technical solution is adopted:

[0005] A mold ejection structure includes a driving component, an ejection component, and a limiting component. The driving component is connected to the ejection component and drives the ejection component to eject. The limiting components are disposed on both sides of the ejection component. The ejection component includes a first ejection plate and a second ejection plate disposed below the first ejection plate. The driving component is connected to the first ejection plate. A first ejector pin is provided on the first ejection plate, and a second ejector pin is provided on the second ejection plate. The second ejector pin passes through the first ejection plate. Mounting seats are provided at both ends of the first ejection plate, and locking components are provided at both ends of the second ejection plate. When the ejection component is located below the limiting component, the locking components are locked to the mounting seats. When the ejection component moves to the limiting component, the locking components disengage from the mounting seats, and the first and second ejection plates are unlocked.

[0006] In some embodiments, the locking assembly includes a locking rod and an elastic element. The elastic element is disposed in the receiving cavity of the second ejector plate. One end of the locking rod abuts against the elastic element, and the other end extends out of the receiving cavity toward the mounting seat. The mounting seat is provided with a hook, and the locking rod engages or disengages with the hook.

[0007] In some embodiments, the mounting base has a strip-shaped hole with a fixing member in the strip-shaped hole, and the first ejector plate is detachably connected to the mounting base via the fixing member.

[0008] In some embodiments, the mounting base includes a connecting portion and a bending portion, the connecting portion and the bending portion being arranged perpendicularly, the hook being disposed on the bending portion, and the strip hole being disposed on the connecting portion.

[0009] In some embodiments, the limiting component includes a limiting block having a guide ramp located on the movement path of the locking rod.

[0010] In some embodiments, the width of the hook is smaller than the width of the locking rod.

[0011] In some embodiments, the limiting block has a baffle, a guide slope is provided at the bottom of the baffle, and an avoidance channel is provided on the side of the baffle, through which the moving path of the mounting base passes.

[0012] In some embodiments, the limiting component includes a bracket, a limiting block is fixed on the bracket, and the driving component is disposed on a base plate, with the base plate located between two brackets.

[0013] In some embodiments, the first ejector pin and the second ejector pin are ejector pins with the same structure. The ejector pin has a contraction section, and the upper and lower parts of the contraction section are respectively provided with an upper section and a lower section. The diameter of the contraction section is smaller than that of the upper section and the lower section.

[0014] In some embodiments, the surface of the contraction section is provided with a plurality of spherical protrusions.

[0015] The mold ejection structure provided by this utility model has the following advantages:

[0016] This invention uses a single drive assembly to control the first and second ejector pins to lift the product, reducing the number of drive assemblies, minimizing space occupation, and simplifying the structure. Through the cooperation of the limiting assembly and the ejection assembly, the first and second ejector plates are automatically locked and unlocked, facilitating the segmented lifting and lowering of the first and second ejector plates. The use of ejector pins with a retractable section reduces friction between the ejector pins and the ejector plates, extending their service life. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a mold ejection structure provided in Embodiment 1 of this utility model.

[0019] Figure 2 This is a schematic diagram of the locking component provided in Embodiment 1 of this utility model.

[0020] Figure 3 This is a schematic diagram of the material being fully lifted according to Embodiment 1 of this utility model.

[0021] Figure 4 This is a schematic diagram of the mounting base provided in Embodiment 1 of this utility model.

[0022] Figure 5 This is a schematic diagram of the limiting block provided in Embodiment 1 of this utility model.

[0023] Figure 6 This is a schematic diagram of a pin mechanism provided in Embodiment 2 of this utility model.

[0024] Attached Figure

[0025] 1. Drive assembly; 2. Ejection assembly; 3. Limiting assembly; 4. Locking assembly; 5. Fixing component; 6. Base plate; 11. Driver; 21. First ejector plate; 22. Second ejector plate; 23. First ejector pin; 24. Second ejector pin; 25. Mounting base; 31. Limiting block; 32. Bracket; 41. Locking rod; 42. Elastic component; 71. Retraction section; 72. Upper section; 73. Lower section; 711. Spherical protrusion. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0027] <Example 1>

[0028] like Figures 1 to 5As shown, a mold ejection structure in this embodiment includes a driving assembly 1, an ejection assembly 2, and a limiting assembly 3. The driving assembly 1 is connected to the ejection assembly 2, driving the ejection assembly 2 to eject. The driving assembly 1 drives the ejection assembly to rise and fall vertically, thereby lifting the material 10 above the ejection assembly 2. When the mold opens, the upper mold 20 opens, and then the material 10 is lifted by the driving assembly 1. The limiting assembly 3 is disposed on both sides of the ejection assembly 2. The ejection assembly 2 includes a first ejection plate 21 and a second ejection plate 22 disposed below the first ejection plate 21. The first ejection plate 21 and the second ejection plate 22 are horizontally disposed. The driving assembly 1 is connected to the first ejection plate 21. The first ejection plate 21 is provided with a first ejector pin 23, and the second ejection plate 22 is provided with a second ejector pin 24. The first ejector pin 23 and the second ejector pin 24 are arranged in parallel. The second ejector pin 24 passes through the first ejection plate 21, and the first ejection plate 21 is provided with mounting seats 25 at both ends. The second ejector plate 22 is equipped with locking components 4 at both ends. When the ejector component 2 is below the limiting component 3, the locking components 4 are locked to the mounting base 25. At this time, the first ejector plate 21 and the second ejector plate 22 are connected, and the second ejector plate 22 rises and falls synchronously with the first ejector plate 21. When the ejector component 2 moves to the limiting component 3, the locking components 4 disengage from the mounting base 25, and the first ejector plate 21 and the second ejector plate 22 are unlocked. At this time, the first ejector plate 21 and the second ejector plate 22 are not fixedly connected. When the drive component 1 continues to push the first ejector plate 21 upward, the first ejector plate 21 and the second ejector plate 22 separate. In the above technical solution, when the mold needs to be demolded, the drive component 1 drives the first ejector plate 21 to rise. Since the first and second ejector plates are locked by the locking components 4, the first and second ejector plates rise synchronously, and the first and second ejector pins jointly push the product upward. When the device moves to the position of the limiting component 3, the locking component 4 disengages from the mounting base 25, the first ejector plate 21 and the second ejector plate 22 unlock, and the drive component 1 continues to push the first ejector plate 21, causing the first ejector pin to continue pushing the product upward. Through the above technical solution, two-stage ejection can be achieved by assembling and separating the first and second ejector plates, and two-stage ejection of the first and second ejector pins can be achieved by a single drive component 1.

[0029] Furthermore, the locking assembly 4 includes a locking rod 41 and an elastic element 42. The elastic element 42 is disposed within the receiving cavity 221 of the second ejector plate 22. In this embodiment, the elastic element 42 is a spring. One end of the locking rod 41 abuts against the elastic element 42, and the other end extends out of the receiving cavity 221 toward the mounting base 25. The mounting base 25 is provided with a hook 251, and the locking rod 41 engages or disengages with the hook 251. The elastic element 42 provides pre-pressure to the locking rod 41, causing it to face toward the mounting base 25. When the ejector assembly 2 is located below the limiting assembly 3, the locking rod 41 presses against the hook 251, forming a lock in the vertical direction. The locking rod 41 and the mounting base 25 are locked together, and the first ejector plate and the second ejector plate are fixedly connected. When the locking rod 41 retracts toward the elastic element 42, the locking rod 41 can disengage from the hook 251, thereby unlocking the first and second ejector plates. The mounting base 25 has a strip-shaped hole 254, in which a fixing member 5 is provided. The first ejector plate 21 is detachably connected to the mounting base 25 via the fixing member 5. The fixing member 5 can be an existing locking device such as a screw. The fixing member 5 and the first ejector plate 21 can be connected by a thread. By providing the strip-shaped hole 254, the positions of the mounting base 25 and the first ejector plate 21 can be adjusted relative to each other. The mounting base 25 can be moved left and right to adjust the disengagement position of the locking rod 41 and the hook 251. Specifically, the limiting component 3 includes a limiting block 31, which has a guide slope 311. The guide slope 311 is located on the movement path of the locking rod 41. In this embodiment, the locking rod 41 moves up and down, and the guide slope 311 faces downward and is located above the locking rod 41. When the locking rod 41 moves upward to contact the guide slope 311, the locking rod 41 is squeezed by the guide slope 311 and contracts inward, compressing the elastic element 42, thereby disengaging the locking rod 41 from the mounting base 25. The mounting base 25 includes a connecting part 252 and a bending part 253, which are arranged perpendicularly. The hook 251 is provided on the bending part 253, and the strip hole 254 is provided on the connecting part 252. The locking rod 41 is arranged horizontally, and the bending part 253 has abutting surface 255. The locking rod 41 abuts against the abutting surface 255, so that after the locking rod 41 is connected to the bending part 253, the first and second ejector plates will not disengage during lifting and lowering.

[0030] Furthermore, the width h of the hook 251 is smaller than the width of the locking rod 41. When the hook 251 moves to the position of the limiting block 31, the guide slope 311 is located on the side of the hook 251. Therefore, when the width of the locking rod 41 is greater than the width of the hook 251, the locking rod 41 can disengage from the guide slope 311, thereby disengaging from the hook 251. The limiting block 31 has a baffle 312, and the guide slope 311 is located at the bottom of the baffle 312. The side of the baffle 312 is provided with an avoidance channel 313. The moving path of the mounting seat 25 passes through the avoidance channel 313. When the mounting seat 25 moves to the position of the limiting block 31, it can pass through the avoidance channel 313, thereby avoiding interference. The limiting component 3 includes a bracket 32, and the limiting block 31 is fixed on the bracket 32, which can be detachably connected by bolts. The driving component 1 is set on the base plate 6, and the base plate 6 is located between the two brackets 32, thereby making the overall structure more stable. The drive assembly 1 includes a driver 11, whose telescopic rod 111 is connected to the first ejector plate 21. The driver 11 can be an existing power device such as a cylinder or hydraulic cylinder. The extension and retraction of the telescopic rod 111 controls the raising and lowering of the first ejector plate 21.

[0031] <Example 2>

[0032] In this embodiment, the parts that are the same as in Embodiment 1 are given the same reference numerals, and the same text descriptions are omitted.

[0033] like Figure 6 As shown, compared to Embodiment 1, the mold ejection structure provided in this embodiment has the following structural design differences:

[0034] The first ejector pin 23 and the second ejector pin 24 are ejector pins with identical structures. Each ejector pin has a contraction section 71, with an upper section 72 and a lower section 73 respectively at its upper and lower parts. The diameter of the contraction section 71 is smaller than that of the upper section 72 and the lower section 73. By providing the contraction section 71, the friction between the ejector pin and the first ejector plate can be reduced when the ejector pin moves relative to the first ejector plate, thus reducing wear. Furthermore, the surface of the contraction section 71 is provided with several spherical protrusions 711, which can strengthen the structural strength of the contraction section, making it less prone to bending. In addition, it can reduce the frictional resistance between the spherical protrusions and the first ejector plate.

[0035] In the above embodiments one and two, during the working process, depending on the different working environments, some of the technical implementation methods of embodiments one and two can be combined or replaced.

[0036] The technical principles of this utility model have been described above in conjunction with specific embodiments. However, it should be noted that these descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, other specific embodiments or equivalent substitutions of this utility model that can be conceived by those skilled in the art without creative effort will all fall within the scope of protection of this utility model.

Claims

1. A mold ejection structure, characterized in that, The device includes a drive assembly, an ejection assembly, and a limiting assembly. The drive assembly is connected to the ejection assembly and drives the ejection assembly to eject. The limiting assemblies are located on both sides of the ejection assembly. The ejection assembly includes a first ejection plate and a second ejection plate located below the first ejection plate. The drive assembly is connected to the first ejection plate. The first ejection plate has a first ejector pin, and the second ejection plate has a second ejector pin that passes through the first ejection plate. The first ejection plate has mounting seats at both ends, and the second ejection plate has locking assemblies at both ends. When the ejection assembly is located below the limiting assembly, the locking assemblies lock with the mounting seats. When the ejection assembly moves to the limiting assembly, the locking assemblies disengage from the mounting seats, and the first and second ejection plates unlock.

2. The mold ejection structure according to claim 1, characterized in that, The locking assembly includes a locking rod and an elastic element. The elastic element is disposed in the receiving cavity of the second top plate. One end of the locking rod abuts against the elastic element, and the other end extends out of the receiving cavity toward the mounting seat. The mounting seat is provided with a hook, and the locking rod engages or disengages with the hook.

3. The mold ejection structure according to claim 2, characterized in that, The mounting base has a strip-shaped hole, and a fixing element is provided in the strip-shaped hole. The first top plate is detachably connected to the mounting base through the fixing element.

4. The mold ejection structure according to claim 3, characterized in that, The mounting base includes a connecting part and a bending part, the connecting part and the bending part are arranged perpendicularly, the hook is provided on the bending part, and the strip hole is provided on the connecting part.

5. The mold ejection structure according to claim 4, characterized in that, The limiting component includes a limiting block with a guide ramp located on the movement path of the locking rod.

6. The mold ejection structure according to claim 5, characterized in that, The width of the hook is smaller than the width of the locking rod.

7. The mold ejection structure according to claim 6, characterized in that, The limiting block has a baffle, a guide slope is provided at the bottom of the baffle, and an avoidance channel is provided on the side of the baffle. The moving path of the mounting base passes through the avoidance channel.

8. The mold ejection structure according to claim 7, characterized in that, The limiting component includes a bracket, a limiting block is fixed on the bracket, and the driving component is disposed on the base plate, which is located between the two brackets.

9. The mold ejection structure according to claim 1, characterized in that, The first ejector pin and the second ejector pin are ejector pins with the same structure. The ejector pin has a contraction section. The upper part and the lower part of the contraction section are respectively provided with an upper section and a lower section. The diameter of the contraction section is smaller than that of the upper section and the lower section.

10. The mold ejection structure according to claim 9, characterized in that, The surface of the contraction section is provided with several spherical protrusions.

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