Sliding block core-pulling structure of injection mold

Abstract

The utility model discloses a sliding block core-pulling structure of an injection mold, which comprises a lower mold seat, an upper mold seat, an inner mold seat, a guide seat, a plurality of sliding blocks, a plurality of sliding block connecting rods and a plurality of sliding block supports, a mold core is formed at the top of the inner mold seat, and the mold core comprises a plurality of first blade forming parts; oblique sliding block containing holes are formed in the adjacent positions of the first blade forming parts, the sliding blocks penetrate through the sliding block containing holes in a one-to-one correspondence mode, second blade forming parts are formed at the upper ends of the sliding blocks, the edge shapes of the second blade forming parts are matched with the edge shapes of the sliding block containing holes, and the sliding block connecting rods correspond to the sliding blocks in a one-to-one correspondence mode. The first end is arranged in the first sliding groove and is in sliding fit with the first sliding groove, the multiple sliding block supports are evenly distributed on the top of the lower die base along the circular track, and the second end is arranged in the second sliding groove and is in sliding fit with the second sliding groove. After injection molding is completed, mold stripping is easier, meanwhile, core pulling control over the sliding block is facilitated, and machining and forming of the impeller are facilitated.

Description

Technical Field

[0001] The utility model relates to an impeller injection mold, in particular to a core-pulling structure of a slide block of an injection mold. Background Art

[0002] A common impeller structure is as Figure 1 shown. It includes a rim 100 and a plurality of blades 101. The blades 101 generally extend in an arc shape, and the width gradually changes from the inside to the outside. For an impeller with such a shape, after injection molding, due to the irregularity of the impeller blades, it cannot be formed by a conventional slide block, and it is difficult to demold according to the existing lifter and rotation methods, resulting in high manufacturing difficulty. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a core-pulling structure of a slide block of an injection mold that is easy to demold and convenient for core pulling in view of the deficiencies of the prior art.

[0004] To solve the above technical problem, the utility model adopts the following technical solutions.

[0005] An injection mold slider core-pulling structure, which includes a lower mold base, an upper mold base, an inner mold base, a guide base, a plurality of sliders, a plurality of slider connecting rods and a plurality of slider supports. The upper mold base and the lower mold base are stacked up and down. A receiving opening is formed at the top of the upper mold base, and an embedding opening is formed at the bottom of the receiving opening. The guide base is embedded in the embedding opening. The inner mold base is arranged in the receiving opening and is stacked on the top of the guide base. A mold core is formed at the top of the inner mold base. The mold core includes a plurality of blade first forming parts. An inclined slider receiving hole is formed at the adjacent position of each blade first forming part. A plurality of inclined slide ways are formed on the guide base and are evenly distributed along a circular track. The slider connecting rods pass through the inclined slide ways one by one, and the sliders pass through the slider receiving holes one by one. A blade second forming part is formed at the upper end of the slider. The edge shape of the blade second forming part matches the edge shape of the slider receiving hole. The slider connecting rods correspond to the sliders one by one. A first end head with a "T"-shaped cross section is formed at the lower end of the slider. A first sliding groove with a "T"-shaped cross section is formed at the upper end of the slider connecting rod. The first end head is arranged in the first sliding groove and the two are in sliding cooperation. A second end head with a "T"-shaped cross section is formed at the lower end of the slider connecting rod. A plurality of slider supports are evenly distributed along a circular track on the top of the lower mold base. The slider supports are fixedly connected to the lower mold base and correspond to the slider connecting rods one by one. A second sliding groove with a "T"-shaped cross section and extending obliquely is formed on the slider support. The second end head is arranged in the second sliding groove and the two are in sliding cooperation. When the lower mold base moves downward relative to the upper mold base, the slider support pulls the slider connecting rod and the slider obliquely, so that the blade second forming part retracts into the slider receiving hole.

[0006] Preferably, a plurality of support fixing openings corresponding to the plurality of slider supports are formed at the top of the lower mold base. The slider supports are fixed in the support fixing openings through support bolts.

[0007] Preferably, a convex step part is formed at one end of the support fixing opening close to the center of the lower mold base. A concave step part is formed at the bottom of the slider support. The concave step part and the convex step part are engaged with each other.

[0008] Preferably, the upper ends of two adjacent sliders are arranged in a cross manner.

[0009] Preferably, a polygonal upper step part is formed at the bottom of the guide base. A polygonal lower step part is formed at the inner edge of the embedding opening. The polygonal upper step part and the polygonal lower step part are engaged with each other.

[0010] Preferably, a mold core receiving opening is formed at the top of the inner mold base. The mold core is located in the mold core receiving opening.

[0011] Preferably, a liftable ejector block is provided in the cavity insert accommodating opening. A cavity insert through hole is formed in the ejector block. The upper end of the cavity insert passes through the cavity insert through hole. A lift driving block for driving the ejector block to move up and down is provided below the lower mold base.

[0012] Preferably, a plurality of limiting blocks are formed in the cavity insert accommodating opening. The plurality of limiting blocks are evenly distributed along the periphery of the cavity insert. A plurality of limiting bayonets are formed at the edge of the cavity insert through hole. The plurality of limiting blocks respectively pass through the plurality of limiting bayonets, and the limiting blocks are in sliding fit with the limiting bayonets.

[0013] Preferably, it includes a bottom plate. Two support blocks are fixed on the bottom plate. The upper ends of the two support blocks are fixedly connected to the bottom of the lower mold base. The lift driving block is arranged between the two support blocks. A plurality of vertically arranged driving rods are fixed to the top of the lift driving block. The driving rods sequentially pass through the guide seat and the inner mold base, and the driving rods are in sliding fit with the guide seat and the inner mold base respectively. The upper ends of the plurality of driving rods are fixedly connected to the ejector block.

[0014] The slider core-pulling structure of the injection mold disclosed by the present utility model can perform a core-pushing step and a core-pulling step during the movement process. When performing the core-pushing step, first use a preset driving mechanism to drive the lower mold base to move upward. During the upward movement of the slider support, the slider link and the slider are obliquely pushed. At the same time, the second end slides adaptively obliquely downward along the second chute until the slider passes through the slider accommodating hole. The edge of the second blade forming part matches the edge of the slider accommodating hole. At this time, the second blade forming part and the first blade forming part jointly form the inner forming surface of the blade. Then, through mold clamping and injection molding, the impeller is processed and formed. When the injection molding is completed and the core-pulling step needs to be performed, use a preset driving mechanism to drive the lower mold base to move downward relative to the upper mold base. The slider support obliquely pulls the slider link and the slider. At the same time, the second end slides adaptively obliquely upward along the second chute to make the second blade forming part retract into the slider accommodating hole, removing the restriction of the second blade forming part on the inner side of the blade. Then, use mechanical structures such as clamping claws to take out the impeller. Based on the above structure, the present utility model is more easily demolded after injection molding, and at the same time, it is convenient to control the core-pulling of the slider, which is beneficial to the processing and forming of the impeller. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the impeller structure;

[0016] Figure 2 It is a three-dimensional view of the slider core-pulling structure of the injection mold of the present utility model;

[0017] Figure 3It is an enlarged view of the top structure of the inner mold base;

[0018] Figure 4 It is an exploded view of the slider core-pulling structure of the injection mold of the present utility model;

[0019] Figure 5 It is a three-dimensional view of the inner mold base;

[0020] Figure 6 It is a structural diagram of the lifting drive block, drive rod and top block;

[0021] Figure 7 It is a structural diagram of the guide seat, slider, slider connecting rod and slider support;

[0022] Figure 8 It is a structural diagram of the guide seat, slider and slider support;

[0023] Figure 9 It is a structural diagram of the top block and the inner mold base;

[0024] Figure 10 It is a comparative view of the action states of the present utility model when performing the core-pulling step;

[0025] Figure 11 It is a comparative view of the action states of the present utility model when performing the step of taking the impeller. Specific embodiments

[0026] The present utility model will be described in more detail below in conjunction with the accompanying drawings and embodiments.

[0027] The present utility model discloses a slider core-pulling structure of an injection mold, in combination with Figures 2 to 9As shown in the figure, it includes a lower die base 1, an upper die base 2, an inner die base 3, a guide base 4, a plurality of sliders 5, a plurality of slider linkages 6 and a plurality of slider supports 7. The upper die base 2 and the lower die base 1 are arranged in a stacked manner up and down. An accommodation opening 20 is formed at the top of the upper die base 2, and an embedding opening 21 is formed at the bottom of the accommodation opening 20. The guide base 4 is embedded in the embedding opening 21. The inner die base 3 is arranged in the accommodation opening 20, and the inner die base 3 is stacked on the top of the guide base 4. A mold core 30 is formed at the top of the inner die base 3. The mold core 30 includes a plurality of blade first forming parts 31. An inclined slider accommodation hole 32 is formed at the adjacent position of each blade first forming part 31. A plurality of inclined slideways 40 evenly distributed along a circular track are formed on the guide base 4. The slider linkages 6 pass through the inclined slideways 40 one by one, and the sliders 5 pass through the slider accommodation holes 32 one by one. A blade second forming part 50 is formed at the upper end of the slider 5. The edge shape of the blade second forming part 50 matches the edge shape of the slider accommodation hole 32. The slider linkages 6 and the sliders 5 are in one-to-one correspondence. A first end 51 with a "T" - shaped cross - section is formed at the lower end of the slider 5. A first chute 60 with a "T" - shaped cross - section is formed at the upper end of the slider linkage 6. The first end 51 is arranged in the first chute 60 and they are in sliding fit. A second end 61 with a "T" - shaped cross - section is formed at the lower end of the slider linkage 6. A plurality of slider supports 7 are evenly distributed along a circular track on the top of the lower die base 1. The slider supports 7 are fixedly connected to the lower die base 1 and the slider supports 7 and the slider linkages 6 are in one-to-one correspondence. A second chute 70 with a "T" - shaped cross - section and extending obliquely is formed on the slider support 7. The second end 61 is arranged in the second chute 70 and they are in sliding fit. When the lower die base 1 moves downward relative to the upper die base 2, the slider support 7 obliquely pulls the slider linkage 6 and the slider 5, so that the blade second forming part 50 retracts into the slider accommodation hole 32.

[0028] During the movement of the above structure, the core-pushing step and the core-pulling step can be executed. When executing the core-pushing step, first use the preset driving mechanism to drive the lower mold base 1 to move upward. During the upward movement of the slider support 7, it obliquely pushes the slider connecting rod 6 and the slider 5. At the same time, the second end 61 slides adaptively obliquely downward along the second chute 70 until the slider 5 passes through the slider receiving hole 32, and the edge of the second blade forming part 50 matches the edge of the slider receiving hole 32. At this time, the second blade forming part 50 and the first blade forming part 31 jointly form the inner forming surface of the blade 101. Then, through mold clamping and injection molding, the impeller is processed and formed. When the injection molding is completed, the core-pulling step needs to be executed. Use the preset driving mechanism to drive the lower mold base 1 to move downward relative to the upper mold base 2. The slider support 7 obliquely pulls the slider connecting rod 6 and the slider 5. At the same time, the second end 61 slides adaptively obliquely upward along the second chute 70 to make the second blade forming part 50 retract into the slider receiving hole 32, removing the restriction of the second blade forming part 50 on the inner side of the blade 101, and then use mechanical structures such as clamping jaws to take out the impeller. Based on the above structure, the present utility model is more easily demolded after injection molding, and at the same time, it is convenient to control the core pulling of the slider 5, which is beneficial to the processing and forming of the impeller.

[0029] In order to facilitate the fixing of the slider support 7, in this embodiment, please refer to Figure 7 , a plurality of support fixing ports 10 corresponding to the plurality of slider supports 7 are formed at the top of the lower mold base 1, and the slider support 7 is fixed in the support fixing port 10 through a support bolt 71.

[0030] Furthermore, a convex step portion 11 is formed at one end of the support fixing port 10 close to the center of the lower mold base 1, and a concave step portion 72 is formed at the bottom of the slider support 7. The concave step portion 72 and the convex step portion 11 are engaged with each other. Among them, based on the engagement connection relationship between the concave step portion 72 and the convex step portion 11, it can not only improve the matching degree between the slider support 7 and the support fixing port 10, but also limit the installation direction of the slider support 7, having a good anti-fooling effect.

[0031] Since the blade 101 is an arc-shaped structure, in this embodiment, please refer to Figure 3 and Figure 7The upper ends of two adjacent sliders 5 are arranged crosswise. In practical applications, the area of the second blade forming portion 50 at the top of the slider 5 is preferably larger than the area of the first blade forming portion 31, so that the second blade forming portion 50 corresponds to most of the inner area of the blade 101. When the slider 5 is pulled downward, only the smaller first blade forming portion 31 contacts the blade 101, so the blade 101 is less restricted, making it easier to remove the impeller workpiece.

[0032] In order to reliably fix the guide seat 4 and at the same time limit the installation orientation of the guide seat 4, in this embodiment, a polygonal upper step portion 41 is formed at the bottom of the guide seat 4, and a polygonal lower step portion 22 is formed at the inner edge of the embedding opening 21, and the polygonal upper step portion 41 and the polygonal lower step portion 22 are engaged with each other.

[0033] As a preferred embodiment, a mold core accommodating opening 33 is provided on the top of the inner mold base 3 , and the mold core 30 is located in the mold core accommodating opening 33 .

[0034] On this basis, this embodiment also has a workpiece ejection structure, see Figure 3 、 Figure 5 and Figure 9 The mold core accommodating opening 33 is provided with a liftable top block 8, and a mold core through-hole 80 is provided on the top block 8. The upper end of the mold core 30 passes through the mold core through-hole 80. A lift drive block 9 is provided below the lower mold base 1 for driving the lift block 8 to move up and down. The lift drive block 9 is driven by a preset external drive mechanism, and the edge of the top block 8 abuts against the wheel rim 100. Figure 10 and Figure 11 As shown, during the core pulling step, the impeller is clamped by a pre-set mechanical clamp. As the slider 5 retracts diagonally downward, the push block 8 lifts the wheel rim 100 upward. Simultaneously, the mechanical clamp holds the impeller and rotates it by a pre-set angle in a direction opposite to the retraction direction of the slider 5 until the impeller separates from the mold core 30, completing the mold removal process. This mold removal process is simple and does not interfere with the position of the various parts of the impeller, making the mold removal process smoother and more accurate.

[0035] In order to ensure that the top block 8 moves straight up and down, in this embodiment, see Figure 9 A plurality of limit blocks 34 are formed in the mold core accommodating opening 33, and the plurality of limit blocks 34 are evenly distributed around the mold core 30. A plurality of limit slots 81 are formed on the edge of the mold core through-hole 80, and the plurality of limit blocks 34 pass through the plurality of limit slots 81 respectively, and the limit blocks 34 slide in conjunction with the limit slots 81.

[0036] For the preferred driving mode of the top block 8, seeFigure 3 and Figure 5 In this embodiment, a bottom plate 12 is included. Two support blocks 13 are fixed on the bottom plate 12. The upper ends of the two support blocks 13 are fixedly connected to the bottom of the lower die base 1. The lifting drive block 9 is arranged between the two support blocks 13. A plurality of vertically arranged drive rods 90 are fixed to the top of the lifting drive block 9. The drive rods 90 sequentially pass through the guide seat 4 and the inner die base 3, and the drive rods 90 are respectively in sliding fit with the guide seat 4 and the inner die base 3. The upper ends of the plurality of drive rods 90 are fixedly connected to the top block 8.

[0037] Based on the above structure, the present utility model also relates to an injection mold slider core-pulling method, in combination with Figures 1 to 11 as shown, the core-pulling method is realized based on the above-mentioned core-pulling structure, and the core-pulling method includes:

[0038] Core-pushing step: Using a preset driving mechanism to drive the lower die base 1 to move upward, the slider support 7 obliquely pushes the slider link 6 and the slider 5 until the slider 5 passes through the slider receiving hole 32, and the edge of the second blade forming portion 50 matches the edge of the slider receiving hole 32;

[0039] Core-pulling step: Using a preset driving mechanism to drive the lower die base 1 to move downward relative to the upper die base 2, the slider support 7 obliquely pulls the slider link 6 and the slider 5 to retract the second blade forming portion 50 into the slider receiving hole 32.

[0040] The above is only a preferred embodiment of the present utility model and is not used to limit the present utility model. Any modifications, equivalent replacements or improvements made within the technical scope of the present utility model shall be included within the scope protected by the present utility model.

Claims

1. An injection mold slider core-pulling structure, characterized in that, It includes a lower die base (1), an upper die base (2), an inner die base (3), a guide base (4), a plurality of sliders (5), a plurality of slider linkages (6) and a plurality of slider supports (7). The upper die base (2) and the lower die base (1) are arranged in a stacked manner up and down. An accommodation opening (20) is formed at the top of the upper die base (2). An embedding opening (21) is formed at the bottom of the accommodation opening (20). The guide base (4) is embedded in the embedding opening (21). The inner die base (3) is arranged in the accommodation opening (20), and the inner die base (3) is stacked on the top of the guide base (4). A mold core (30) is formed at the top of the inner die base (3). The mold core (30) includes a plurality of blade first forming parts (31). An inclined slider accommodation hole (32) is formed at the adjacent position of each blade first forming part (31). A plurality of inclined slideways (40) evenly distributed along a circular track are formed on the guide base (4). The slider linkages (6) pass through the inclined slideways (40) one by one, and the sliders (5) pass through the slider accommodation holes (32) one by one. A blade second forming part (50) is formed at the upper end of the slider (5). The edge shape of the blade second forming part (50) matches the edge shape of the slider accommodation hole (32). The slider linkages (6) and the sliders (5) are in one-to-one correspondence. A first end (51) with a "T"-shaped cross section is formed at the lower end of the slider (5). A first chute (60) with a "T"-shaped cross section is formed at the upper end of the slider linkage (6). The first end (51) is arranged in the first chute (60) and the two are in sliding fit. A second end (61) with a "T"-shaped cross section is formed at the lower end of the slider linkage (6). A plurality of slider supports (7) are evenly distributed along a circular track on the top of the lower die base (1). The slider supports (7) are fixedly connected to the lower die base (1) and the slider supports (7) and the slider linkages (6) are in one-to-one correspondence. A second chute (70) with a "T"-shaped cross section and extending obliquely is formed on the slider support (7). The second end (61) is arranged in the second chute (70) and the two are in sliding fit. When the lower die base (1) moves downward relative to the upper die base (2), the slider support (7) obliquely pulls the slider linkage (6) and the slider (5) to make the blade second forming part (50) retract into the slider accommodation hole (32).

2. The core-pulling structure of the injection mold slider according to claim 1, characterized in that, A plurality of support fixing openings (10) corresponding to the plurality of slider supports (7) are formed at the top of the lower die base (1). The slider supports (7) are fixed in the support fixing openings (10) through support bolts (71).

3. The core-pulling structure of the injection mold slider according to claim 2, characterized in that, A convex step portion (11) is formed at one end of the support fixing opening (10) close to the center of the lower die base (1). A concave step portion (72) is formed at the bottom of the slider support (7). The concave step portion (72) and the convex step portion (11) are engaged with each other.

4. The core-pulling structure of the injection mold slider according to claim 1, characterized in that, The upper ends of two adjacent sliders (5) are arranged in a crossed manner.

5. The core-pulling structure of the injection mold slider according to claim 1, characterized in that, The bottom of the guiding seat (4) is formed with a polygonal upper step portion (41), the inner edge of the embedding opening (21) is formed with a polygonal lower step portion (22), and the polygonal upper step portion (41) is engaged with the polygonal lower step portion (22).

6. The core-pulling structure of the injection mold slider according to claim 1, wherein, The top of the inner mold base (3) is provided with a mold core accommodating opening (33), and the mold core (30) is located within the mold core accommodating opening (33).

7. The core-pulling structure of the injection mold slider according to claim 6, wherein A liftable ejector block (8) is provided within the mold core accommodating opening (33). A mold core through hole (80) is formed in the ejector block (8). The upper end of the mold core (30) passes through the mold core through hole (80). Below the lower mold base (1), there is a lifting drive block (9) for driving the lifting movement of the ejector block (8).

8. The core-pulling structure of the slider of the injection mold according to claim 7, characterized in that, A plurality of limiting blocks (34) are formed within the mold core accommodating opening (33). The plurality of limiting blocks (34) are evenly distributed around the mold core (30). A plurality of limiting notches (81) are formed at the edge of the mold core through hole (80). The plurality of limiting blocks (34) respectively pass through the plurality of limiting notches (81), and the limiting blocks (34) are in sliding fit with the limiting notches (81).

9. The core-pulling structure of the injection mold slider according to claim 7, characterized in that, It includes a bottom plate (12). Two support blocks (13) are fixed on the bottom plate (12). The upper ends of the two support blocks (13) are fixedly connected to the bottom of the lower mold base (1). The lifting drive block (9) is disposed between the two support blocks (13). A plurality of vertically arranged drive rods (90) are fixed to the top of the lifting drive block (9). The drive rods (90) sequentially pass through the guiding seat (4) and the inner mold base (3), and the drive rods (90) are in sliding fit with the guiding seat (4) and the inner mold base (3) respectively. The upper ends of the plurality of drive rods (90) are fixedly connected to the ejector block (8).

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