Ejector rod sliding block demolding mechanism

Abstract

The utility model discloses an ejector rod sliding block demoulding mechanism which comprises an ejector plate (1) connected with an ejector rod of an injection molding machine and two half type sliding blocks (2) obliquely and movably connected with a fixed mould, an ejector pin (3) is arranged at the bottom of the ejector plate (1), each half type sliding block (2) is provided with a profiled groove (4), and an opening (5) matched with the ejector pin (3) is formed in the top of each half type sliding block (2). A sealing groove (6) communicated with the opening (5) and the profiled groove (4) is formed between the opening (5) and the profiled groove (4); inclined blocks (7) are arranged on the two sides of the lower end of the ejector pin (3), and inclined grooves (8) matched with the inclined blocks (7) on the corresponding sides are formed in the opening (5); according to the utility model, tripping and ejection actions can be linked and simultaneously carried out, the working efficiency is high, the action ranges required by the tripping and ejection actions are balanced through the linkage of the tripping and ejection actions, and the transmission efficiency of the mechanism is improved.

Description

Technical Field

[0001] This utility model relates to the field of injection molds, and in particular to an ejector pin slider demolding mechanism. Background Technology

[0002] Injection molds are molds used in the plastics processing industry to mold plastic products. They are key equipment in the injection molding process and are widely used in many fields. They form the desired finished product by injecting molten raw material into the mold cavity. After injection molding, the product is formed and needs to be ejected from the mold by a release mechanism. For example, Chinese invention patent CN106738685A discloses a multi-plate Harvard-style release mold, specifically including a left slider, a right slider, an ejector pin, a moving platen, and a push plate. The left and right sliders form a segmented cavity for product molding. After the moving platen opens the segmented cavity, the ejector pin pushes out the product inside, achieving demolding. However, this solution has a relatively complex structure because the slider and ejector pin work separately, resulting in low processing efficiency. Furthermore, to ensure reliable demolding, both components need to perform a sufficient range of motion, leading to low transmission efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a ejector rod and slider demolding mechanism. This invention can simultaneously perform the disengagement and ejection actions, resulting in high work efficiency. Furthermore, the linkage between the two actions balances their required range of motion, thereby improving the transmission efficiency of the mechanism.

[0004] The technical solution of this utility model is as follows: an ejector pin and slider demolding mechanism, comprising an ejector plate connected to the ejector pin of an injection molding machine and two half-type sliders obliquely connected to the fixed mold. The ejector plate has an ejector pin at its bottom, and the half-type sliders have grooves. The top of the half-type sliders has an opening adapted to the ejector pin, and a sealing groove communicating with both is provided between the opening and the groove. Both sides of the lower end of the ejector pin have inclined blocks, and the opening has an inclined groove that cooperates with the corresponding inclined block. The lower end of the ejector pin has a sealing block adapted to the sealing groove, and the bottom surface of the sealing block and the grooves on the two half-type sliders are combined to form a cavity.

[0005] In the aforementioned ejector block demolding mechanism, the inclined block is arranged in a straight upward line from the inside to the outside.

[0006] In the aforementioned ejector pin and slider demolding mechanism, the half-slider includes a right-angled trapezoidal block, with an inclined guide rail on the outer side of the block that is adapted to and connected to the fixed mold, and the groove is located on the lower part of the inner side of the block.

[0007] In the aforementioned ejector pin and slider demolding mechanism, the ejector pin plate is provided with connecting rods on both sides that are connected to the ejector pin of the injection molding machine, and the ends of the connecting rods are provided with nylon plugs.

[0008] The aforementioned ejector pin and slider demolding mechanism also includes a fixed plate connected to the fixed mold, and the fixed plate is provided with a spring connected to the ejector plate.

[0009] The aforementioned ejector pin and slider demolding mechanism also includes a positioning component connected to the fixed mold. The positioning component has a positioning port, and the ejector pin passes through the positioning port.

[0010] In the aforementioned ejector rod and slider demolding mechanism, the bottom of the sealing block is provided with a hole-shaped block for forming holes.

[0011] In the aforementioned ejector rod and slider demolding mechanism, the width of the sealing groove is smaller than the width of the mold groove, and the length of the sealing groove is smaller than the length of the mold groove.

[0012] In the aforementioned ejector block demolding mechanism, the side of the sealing block has an inner sliding plane corresponding to the inclined block setting surface, and the sealing groove has an outer sliding plane that fits with the inner sliding plane.

[0013] In the aforementioned ejector pin and slider demolding mechanism, the opening is a transverse through-type slider.

[0014] Compared with the prior art, before operation, the mold cores of the fixed mold and the moving mold are engaged. The ejector pin drives the half-slider to be positioned in the initial position. At this time, the grooves of the two half-sliders and the bottom surface of the sealing block on the ejector pin are combined to form a cavity, which is closed with the mold core of the moving mold. Molten injection material is injected into the cavity. After molding, the ejector rod of the injection molding machine drives the ejector plate to move the ejector pin downward. During the downward movement of the ejector pin, the half-slider moves in a direction within the fixed mold through its inclined block. The two half-sliders separate, and the sealing block at the end of the ejector pin also ejects the molded product. This realizes the synchronous operation of the release and ejection actions in the demolding process, resulting in high work efficiency. Since the ejector pin is driven by the inclined block, the half-slider is pushed and pulled or pushed by the inclined block during the downward movement due to the different inclination directions of the inclined block. Under the action of the inclined block with different inclination directions and angles, the movement of the ejector pin at the same distance can enable the half-slider to release in various lateral ranges. The linkage between the two balances the required range of action of the two and improves the transmission efficiency of the mechanism. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of this utility model, which removes the fixed mold and includes the product.

[0017] Figure 3 This is a structural diagram of the present invention, showing the removal of one side of the half-slider.

[0018] Figure 4 This is a schematic diagram of the structure of the Huff-type slider of this utility model.

[0019] The markings in the attached diagram are as follows: 1. Ejector plate; 2. Half-type slider; 3. Ejector pin; 4. Groove; 5. Opening; 6. Sealing groove; 7. Angled block; 8. Angled groove; 9. Sealing block; 10. Cavity; 11. Block; 12. Angled guide rail; 13. Connecting rod; 14. Nylon plug; 15. Fixing plate; 16. Spring; 17. Positioning component; 18. Positioning port; 19. Hole block; 20. Inner sliding plane; 21. Outer sliding plane. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0021] Example: Ejector rod and slider demolding mechanism, as shown in the attached diagram. Figure 1 As shown, the injection molding machine includes an ejector plate 1 connected to the ejector pin of the injection molding machine and two half-slider blocks 2 movably connected to the fixed mold. The injection molding machine includes a fixed mold, a moving mold, and an ejector pin. The ejector pin is used to eject the molded product. Both the fixed mold and the moving mold are provided with mold cores. The mold cores are engaged to form a cavity for injection molding. After injection molding, the moving mold drives the corresponding mold core to leave to achieve mold opening. The half-slider blocks are set in the mold core of the fixed mold. The bottom of the ejector plate 1 is equipped with ejector pins 3. The half-slider blocks 2 have grooves 4. The half-slider blocks 2 include a right-angled trapezoidal block 11. The outer side of the block 11 is integrally formed with an inclined guide rail 12 that is adapted to and connected to the mold core of the fixed mold. The mold core of the fixed mold has an inclined guide groove adapted to the inclined guide rail. The two cooperate to realize the directional movement of the block. The groove 4 is set in the lower part of the inner side of the block 11. These are all technical means well known and mastered by those skilled in the art, and will not be described in detail here. As shown in the attached figure Figure 2 - Appendix Figure 4As shown, the top of the half-slider 2 has an opening 5 that matches the ejector pin 3, and a sealing groove 6 that communicates with both the opening 5 and the groove 4; both sides of the lower end of the ejector pin 3 are integrally formed with inclined blocks 7, which are connected to form a whole, and the opening 5 has an inclined groove 8 that matches the corresponding inclined block 7. The inclined groove and the inclined block cooperate to fix the half-slider and guide its movement; the lower end of the ejector pin 3 is integrally formed with a sealing block 9 that matches the sealing groove 6. The two cooperate to separate the upper and lower spaces and achieve sealing on the side. The bottom surface of the sealing block 9 and the groove 4 on the two half-slider 2 are combined to form a mold. Cavity 10; The inclined block 7 is arranged in a straight upward line from the inside to the outside. When the half-slider moves down, it is pulled up, and the lateral release range becomes smaller. It is suitable for demolding actions with large ejection distance and small release stroke. It can also reduce the friction of the half-slider on the workpiece surface and avoid dragging. The ejector plate 1 is equipped with connecting rods 13 on both sides that are connected to the ejector rod of the injection molding machine. The end of the connecting rod 13 is provided with a nylon plug 14. The nylon plug has a certain elasticity. During the power transmission process, it can alleviate the impact force generated when the ejector rod of the injection molding machine moves, avoid rigid impact to damage other parts of the mold, and ensure the stability and service life of the mold.

[0022] Preferably, the ejector pin slider demolding mechanism further includes a fixed plate 15 connected to the fixed mold, and a spring 16 connected to the ejector plate 1 is mounted on the fixed plate 15. The spring provides elastic force to help the mold close and return to its original position.

[0023] Preferably, the ejector pin and slider demolding mechanism further includes a positioning element 17 connected to the fixed mold. The positioning element 17 has a positioning opening 18, and the ejector pin 3 passes through the positioning opening 18 to limit the movement of the ejector pin and ensure the stability of the path. The bottom of the sealing block 9 is integrally formed with a hole block 19 for forming holes. The width and length of the sealing groove 6 are both smaller than the width and length of the groove 4 to ensure that a step is formed between the two to improve the sealing effect. The side of the sealing block 9 is machined with an inner sliding plane 20 corresponding to the setting surface of the inclined block 7, and the sealing groove 6 is machined with an outer sliding plane 21 that fits with the inner sliding plane 20. The two guide the relative lateral movement through the cooperation of the planes. The opening 5 extends laterally through the half-slider 2, and the half-slider can be pulled out laterally from the opening for easy disassembly and maintenance.

[0024] Working principle:

[0025] Mold preparation and cavity formation: Before the injection molding process begins, the mold cores of the fixed mold and the moving mold are engaged. At this time, the ejector pin 3 drives the half-slider 2 to move to the initial position. The grooves 4 of the two half-slider 2 and the bottom surface of the sealing block 9 on the ejector pin 3 cooperate with each other to form a complete cavity 10. At the same time, the mold core of the moving mold also participates and works with the fixed mold to achieve mold closure, creating a closed space for the subsequent injection molding process.

[0026] Injection molding: Once cavity 10 is ready, molten injection molding material is injected into the cavity through injection molding equipment and processes. Under the influence of temperature, pressure and time, the injection molding material gradually cools and solidifies in the cavity, eventually forming a product that meets the design requirements.

[0027] Demolding action initiated: After the product is formed, the injection molding machine ejector rod works, which drives the ejector plate 1, causing the ejector plate 1 to move the ejector pin 3 downward.

[0028] Release action: During the downward movement of ejector pin 3, the inclined blocks 7 on both sides of the lower end of ejector pin 3 play a key role. The inclined blocks 7 cooperate with the inclined groove 8 on the top opening 5 of the half-slider 2. When ejector pin 3 moves downward, the inclined blocks 7 will push the half-slider 2 to move in a direction within the fixed mold along the inclined groove 8. During the process, the two half-slider 2 gradually separate, completing the release action, so that the connection between the plastic product and the half-slider 2 is released, creating conditions for the smooth ejection of the plastic product.

[0029] Product ejection: While the split slider 2 separates, the sealing block 9 at the end of the ejector pin 3 continues to move downward. The bottom surface of the sealing block 9 directly acts on the molded plastic product, ejecting it from the mold. In one action, both the disengagement action and the product ejection action are achieved, improving work efficiency.

[0030] The different tilt directions of the inclined blocks 7 on the ejector pin 3 produce different effects when the half-slider 2 is pushed down. The tilt angle of the inclined blocks 7 determines the range of motion of the half-slider 2 in the lateral and longitudinal directions. By adjusting the tilt direction and angle of the inclined blocks 7, the ejector pin 3 can be moved by the same distance, driving the half-slider 2 to perform various lateral disengagements. This linkage mechanism between the ejector pin 3 and the half-slider 2 effectively balances the required range of motion of both, reduces unnecessary motion loss, and improves the transmission efficiency of the entire mechanism.

[0031] The above embodiments merely illustrate the implementation of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. Furthermore, in these embodiments, "up," "down," "left," "right," "front," and "back" represent relative positions only, not absolute positions. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A ejector plate and slide block demolding mechanism, comprising an ejector plate (1) connected to an ejector rod of an injection molding machine and two half-slide blocks (2) obliquely connected to a fixed mold, wherein the ejector plate (1) is provided with ejector pins (3) at its bottom and the half-slide blocks (2) are provided with grooves (4), characterized in that: The top of the half-type slider (2) is provided with an opening (5) that is adapted to the ejector pin (3), and a sealing groove (6) that communicates with both the opening (5) and the groove (4) is provided; both sides of the lower end of the ejector pin (3) are provided with inclined blocks (7), and the opening (5) is provided with inclined grooves (8) that cooperate with the corresponding inclined blocks (7); the lower end of the ejector pin (3) is provided with a sealing block (9) that is adapted to the sealing groove (6), and the bottom surface of the sealing block (9) and the grooves (4) on the two half-type sliders (2) are combined to form a cavity (10).

2. The ejector rod and slider demolding mechanism according to claim 1, characterized in that: The inclined block (7) is set in a straight line from the inside to the outside and upward.

3. The ejector rod and slider demolding mechanism according to claim 1, characterized in that: The half-slider (2) includes a right-angled trapezoidal block (11), and the outer side of the block (11) is provided with an inclined guide rail (12) adapted to and connected to the fixed mold. The groove (4) is provided at the lower part of the inner side of the block (11).

4. The ejector pin and slider demolding mechanism according to claim 1, characterized in that: The ejector plate (1) has connecting rods (13) on both sides that are connected to the ejector rod of the injection molding machine, and the ends of the connecting rods (13) are provided with nylon plugs (14).

5. The ejector pin and slider demolding mechanism according to claim 1, characterized in that: It also includes a fixed plate (15) connected to the fixed mold, and the fixed plate (15) is provided with a spring (16) connected to the ejector plate (1).

6. The ejector pin and slider demolding mechanism according to claim 1, characterized in that: It also includes a positioning component (17) connected to the fixed mold, the positioning component (17) is provided with a positioning port (18), and the ejector pin (3) passes through the positioning port (18).

7. The ejector rod and slider demolding mechanism according to claim 1, characterized in that: The bottom of the sealing block (9) is provided with a hole-shaped block (19) for forming holes.

8. The ejector pin and slider demolding mechanism according to claim 1, characterized in that: The width of the sealing groove (6) is less than the width of the groove (4), and the length of the sealing groove (6) is less than the length of the groove (4).

9. The ejector pin and slider demolding mechanism according to claim 1, characterized in that: The sealing block (9) has an inner sliding plane (20) on its side that corresponds to the setting surface of the inclined block (7), and the sealing groove (6) has an outer sliding plane (21) that fits with the inner sliding plane (20).

10. The ejector pin and slider demolding mechanism according to claim 1, characterized in that: The opening (5) extends laterally through the half-slider (2).

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