Secondary core-pulling forced demolding structure of injection mold tunnel

Abstract

The utility model provides an injection mold tunnel secondary core-pulling forced demoulding structure, which comprises a top plate, an upper mold, a lower mold, an ejector plate and a bottom plate, the side end of the upper mold is provided with a core-pulling assembly I, the core-pulling assembly I comprises an oil cylinder I, a driving piece, an outer pulling sleeve and an inner pulling rod, the driving piece of the oil cylinder I moves and drives the inner pulling rod and the outer pulling sleeve to move in sequence, and the outer pulling sleeve is driven by the oil cylinder I to move. A second core pulling assembly is arranged at the side end of the lower die and used for forming a third inverted buckle, the first core pulling assembly is arranged, the inner pulling rod and the outer pulling sleeve are pulled out in sequence through the driving piece, and therefore core pulling is completed in sequence under the condition that a long air cylinder is not needed, the compactness of the die is improved, and interference is not likely to happen when the die is designed.

Description

Technical Field

[0001] This utility model relates to molds, and in particular, to a secondary core-pulling and strong extraction structure for injection mold tunnels. Background Technology

[0002] like Figure 1 As shown, a machine cover includes a cover body 90. An inclined pipe 91 is provided at the upper end of the cover body 90. The inner cavity of the pipe 91 forms an inverted buckle 1. A pipe head ring 93 is provided on the outer side of the pipe 91, forming an inverted buckle 2. A pipe 94 is provided at the side end of the cover body 90, forming an inverted buckle 3.

[0003] The aforementioned cover body requires core pulling of pipe one during mold injection. However, both the outer and inner sides of pipe one are undercut. At the same time, due to the presence of the pipe head ring, it is necessary to first pull the core of the inner cavity of pipe one and then forcefully pull the outer side of pipe two to make the pipe head ring come out. The sequential removal requires a long cylinder, which is prone to interference when designing the mold. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a secondary core-pulling and strong extraction structure for injection mold tunnels, which solves the problems in the background art mentioned above.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a secondary core-pulling and forced release structure for injection mold tunnels, including a top plate, an upper mold, a lower mold, an ejector plate, and a bottom plate. The side end of the upper mold is provided with a core-pulling assembly one for forming undercut one and undercut two. The core-pulling assembly one includes a hydraulic cylinder one, a driving component, an outer pulling sleeve, and an inner pulling rod. The hydraulic cylinder one and the driving component move and drive the inner pulling rod and the outer pulling sleeve to move sequentially. The side end of the lower mold is provided with a core-pulling assembly two for forming undercut three.

[0006] By using the above-mentioned technical means, by setting up a core-pulling component, and by using a driving component to pull out the inner pulling rod and the outer pulling sleeve in sequence, the core-pulling can be completed sequentially without the need for a long cylinder, thereby increasing the compactness of the mold and making it less likely to cause interference when designing the mold.

[0007] Preferably, the driving component includes a driving block, the driving block is provided with a first inclined groove and a second inclined groove, the tail of the outer pull sleeve is provided with a first T-shaped block and slides in cooperation with the first inclined groove, the tail of the inner pull rod is provided with a second T-shaped block and slides in cooperation with the second inclined groove, and a gap is provided between the outer pull sleeve and the first inclined groove.

[0008] By using the above-mentioned technical means, by setting a drive block and opening inclined groove one and inclined groove two in the drive block, the hydraulic cylinder one can be placed in parallel, making the mold processing more convenient. By setting a gap between the outer sleeve and inclined groove one, when the hydraulic cylinder one drives the drive block to move, the T-shaped block one at the tail of the outer sleeve gradually contacts inclined groove one. At this time, inclined groove two has driven the inner rod to move a certain distance, thereby achieving the purpose of sequential core pulling.

[0009] Preferably, the inner pull rod has an air hole in the middle.

[0010] By using the above-mentioned technical means and by setting air holes, the negative pressure between the inner pull rod and the product can be prevented from causing damage to the product.

[0011] Preferably, the drive block also has two transverse grooves, each of which is provided with a positioning post. When the mold is closed, the outer sleeve and the inner rod abut against the positioning post respectively.

[0012] By employing the aforementioned technical means, and through the cooperation between the positioning pin and the outer and inner pull rods, the positions of the outer and inner pull rods are restricted during mold closing.

[0013] Preferably, two limit switches are also provided on one side of the cylinder, and a striking plate is provided on the drive block, which moves between the two limit switches.

[0014] By using the above-mentioned technical means, and through the cooperation of limit switches and the punch plate, the system of the injection molding machine can sense whether the hydraulic cylinder has completed core pulling, making it convenient to detect the core pulling status.

[0015] Preferably, the second core-pulling assembly includes a core-pulling seat and a drive rod. The core-pulling seat slides and engages with the lower mold. The drive rod is located at the bottom of the upper mold. The core-pulling seat has an oblique hole that engages with the drive rod. The lower mold also has a limiting block that restricts the stroke of the core-pulling seat.

[0016] Through the above-mentioned technical means, the core pulling is automatically completed when the upper mold and lower mold are separated by the cooperation between the drive rod and the inclined hole, and the core pulling seat is prevented from falling off by the limit block.

[0017] Preferably, the lower mold is further provided with a core-pulling assembly three, which has the same structure as the core-pulling assembly two and is located at the lower end of the outer sleeve.

[0018] Using the aforementioned technical means, the core is pulled out by the inverted buckle formed by the three outer pull sleeves and the driving component of the core-pulling assembly. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the cover structure;

[0020] Figure 2 This is a schematic diagram of the structure of an embodiment;

[0021] Figure 3 This is a partial schematic diagram of Embodiment 1;

[0022] Figure 4 This is a partial cross-sectional view of Embodiment 1;

[0023] Figure 5 for Figure 4 A schematic diagram of part A.

[0024] Reference numerals in the attached drawings: 1. Top plate; 2. Upper mold; 3. Lower mold; 4. Ejector plate; 5. Bottom plate; 6. Core-pulling assembly one; 7. Hydraulic cylinder one; 8. Drive component; 9. Outer sleeve; 10. Inner rod; 11. Drive block; 12. Inclined groove one; 13. Inclined groove two; 16. Air hole; 17. Horizontal groove; 18. Positioning pin; 19. Limit switch; 20. Blowing plate; 21. Core-pulling assembly two; 22. Core-pulling seat; 23. Drive rod; 24. Inclined hole; 25. Core-pulling assembly three; 90. Cover; 91. Pipe one; 93. Pipe head ring; 94. Pipe two. Detailed Implementation

[0025] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered.

[0026] A secondary core-pulling and forced-release structure for injection mold tunnels includes a top plate 1, an upper mold 2, a lower mold 3, an ejector plate 4, and a bottom plate 5. The upper mold 2 has a core-pulling assembly 6 on its side for forming two undercuts. The core-pulling assembly 6 includes a hydraulic cylinder 7, a driving component 8, an outer pull sleeve 9, and an inner pull rod 10. The outer pull sleeve 9 is used to form the second undercut, and the inner pull rod 10 is used to form the first undercut. The hydraulic cylinder 7 and the driving component 8 move, causing the inner pull rod 10 and the outer pull sleeve 9 to move sequentially. The driving component 8 includes a driving block 11, which has a first inclined groove 12 and a second inclined groove 13. The outer pull sleeve 9 has a T-shaped block at its tail that slides into the first inclined groove 12. The inner pull rod 10 has a T-shaped block at its tail that slides into the second inclined groove 13. The inclined groove 13 slides and engages, and there is a gap between the outer sleeve 9 and the inclined groove 12. By setting the drive block 11 and opening the inclined groove 12 and the inclined groove 13 in the drive block 11, the hydraulic cylinder 7 can be placed in parallel, making the mold processing more convenient. By setting the gap 15 between the outer sleeve 9 and the inclined groove 12, when the hydraulic cylinder 7 drives the drive block 11 to move, the T-shaped block 1 at the tail of the outer sleeve 9 gradually contacts the inclined groove 12. At this time, the inclined groove 13 has driven the inner rod 10 to move a certain distance, thereby achieving the purpose of sequential core pulling. Moreover, it can be completed sequentially without the need for a long cylinder, increasing the compactness of the mold and making it less likely to interfere when designing the mold.

[0027] An air hole 16 is provided in the middle of the inner pull rod 10. By providing the air hole 16, the negative pressure between the inner pull rod 10 and the product during production is prevented from causing damage to the product. Two horizontal grooves 17 are also provided in the drive block 11. Each horizontal groove 17 is provided with a positioning post 18. When the mold is closed, the outer pull sleeve 9 and the inner pull rod 10 respectively abut against the positioning post 18. Through the cooperation between the positioning post 18 and the outer pull sleeve 9 and the inner pull rod 10, the position of the outer pull sleeve 9 and the inner pull rod 10 is restricted when the mold is closed. Two limit switches 19 are also provided on the side of the cylinder 7. A beater plate 20 is provided on the drive block 11. The beater plate 20 moves between the two limit switches 19. Through the cooperation between the limit switches 19 and the beater plate 20, the injection molding machine system senses whether the cylinder 7 has completed the core pulling, which facilitates the detection of the core pulling status.

[0028] The lower mold 3 is provided with a core-pulling assembly 21 on its side. The core-pulling assembly 21 is used to form the undercut 3. The core-pulling assembly 21 includes a core-pulling seat 22 and a drive rod 23. The core-pulling seat 22 slides with the lower mold 3. The drive rod 23 is located at the bottom of the upper mold 2. The core-pulling seat 22 is provided with an oblique hole 24 that cooperates with the drive rod 23. The lower mold 3 is also provided with a limiting block to restrict the stroke of the core-pulling seat 22. Through the cooperation between the drive rod 23 and the oblique hole 24, the core is automatically pulled when the upper mold 2 and the lower mold 3 are separated. The limiting block prevents the core-pulling seat 22 from falling off.

[0029] The outer sleeve 9 and the drive block 11 form an undercut four. The lower mold 3 is also equipped with a core-pulling component 3 25. The structure of the core-pulling component 3 25 is the same as that of the core-pulling component 2 21. It is located at the lower end of the outer sleeve 9. The core-pulling component 3 25 is used to pull the core out of the undercut four formed by the outer sleeve 9 and the drive component 8.

[0030] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A secondary core-pulling and forced-release structure for injection mold tunnels, comprising a top plate (1), an upper mold (2), a lower mold (3), an ejector plate (4), and a bottom plate (5), characterized in that: The upper mold (2) is provided with a core-pulling assembly 1 (6) for forming undercut one and undercut two. The core-pulling assembly 1 (6) includes a hydraulic cylinder 1 (7), a driving component (8), an outer sleeve (9) and an inner rod (10). The hydraulic cylinder 1 (7) and the driving component (8) move and drive the inner rod (10) and the outer sleeve (9) to move sequentially. The lower mold (3) is provided with a core-pulling assembly 2 (21) for forming undercut three.

2. The secondary core-pulling and forced-release structure for injection mold tunnels according to claim 1, characterized in that: The driving component (8) includes a driving block (11), which is provided with a first inclined groove (12) and a second inclined groove (13). The outer sleeve (9) is provided with a first T-shaped block at its tail and slides in cooperation with the first inclined groove (12). The inner rod (10) is provided with a second T-shaped block at its tail and slides in cooperation with the second inclined groove (13). A gap is provided between the outer sleeve (9) and the first inclined groove (12).

3. The secondary core-pulling and forced-release structure for injection mold tunnels according to claim 2, characterized in that: An air hole (16) is provided in the middle of the inner pull rod (10).

4. The secondary core-pulling and forced-release structure for injection mold tunnels according to claim 2, characterized in that: The drive block (11) also has two transverse grooves (17), each of which is provided with a positioning post (18). When the mold is closed, the outer sleeve (9) and the inner rod (10) abut against the positioning post (18) respectively.

5. The secondary core-pulling and forced-release structure for injection mold tunnels according to claim 2, characterized in that: Two limit switches (19) are also provided on the side end of the cylinder (7), and a beater (20) is provided on the drive block (11). The beater (20) moves between the two limit switches (19).

6. The secondary core-pulling and forced-release structure for injection mold tunnels according to claim 1, characterized in that: The second core-pulling assembly (21) includes a core-pulling seat (22) and a drive rod (23). The core-pulling seat (22) slides with the lower mold (3). The drive rod (23) is located at the bottom of the upper mold (2). The core-pulling seat (22) has an oblique hole (24) that cooperates with the drive rod (23). The lower mold (3) is also provided with a limiting block to restrict the stroke of the core-pulling seat (22).

7. The secondary core-pulling and forced-release structure for injection mold tunnels according to claim 1, characterized in that: The lower mold (3) is also provided with a core-pulling assembly three (25), which has the same structure as the core-pulling assembly two (21) and is located at the lower end of the outer sleeve (9).

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