Oblique core-pulling mechanism of injection mold

Abstract

The utility model provides an inclined core-pulling mechanism of an injection mold, and belongs to the technical field of injection molds. The oblique core-pulling mechanism of the injection mold comprises a triangular seat, a core-pulling oil cylinder, an insert pin and a sliding block, an oblique sliding hole for the insert pin to slide is formed in a female mold, a vertical plate and the triangular seat are fixed on a bottom plate, the female mold is fixed on the vertical plate, an embedding groove for the triangular seat to be clamped and embedded is formed in the lower end of the female mold, and a strip-shaped seat attached to the triangular seat is further fixed on the bottom plate. The core-pulling oil cylinder is fixed to one end of the strip-shaped base, a strip-shaped sliding groove is formed in the strip-shaped base in the length direction of the strip-shaped base, a transverse rack slides in the strip-shaped sliding groove and is connected with a telescopic rod of the core-pulling oil cylinder through a linkage block, an inclined sliding groove is formed in the inclined face of the triangular base, and an inclined rack is arranged in the inclined sliding groove in a sliding mode. The slider is fixed at the upper end of the oblique rack, and the insert pin is fixed at the front end of the slider. And the piston rod of the core-pulling oil cylinder transversely and horizontally moves to drive the insert pin to obliquely slide, so that the space occupied by the whole injection mold is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds and relates to an inclined core-pulling mechanism of an injection mold. Background Technique

[0002] Most plastic parts are mainly formed by injection molds, and the structures of plastic parts are becoming more and more complex. Especially for some special structures such as inclined holes or inclined grooves, the injection mold needs to adopt an inclined core-pulling method to be demolded. For example, the utility model patent published in China [Patent No. 202222618214.8] discloses a core-pulling oil cylinder and a driving block. The telescopic shaft of the core-pulling oil cylinder is connected to the driving block, and the core-pulling oil cylinder can drive the driving block to slide horizontally. The driving block is provided with a convex strip inclined relative to itself; a dowel pin, which is inclined relative to the driving block. The dowel pin includes a dowel pin body and a dowel pin head that are separately arranged. One end of the dowel pin body is provided with a chute, and the other end of the dowel pin body is detachably connected to the dowel pin head. The convex strip is movably arranged in the chute, and the driving block can drive the dowel pin to perform telescopic movement. However, this core-pulling structure requires the core-pulling oil cylinder to be inclined and on the same straight line as the movement track of the dowel pin, resulting in a large space occupied by the entire mold, and enough space needs to be reserved for the core-pulling oil cylinder to move the telescopic rod. Content of the Utility Model

[0003] The purpose of the utility model is to address the above problems existing in the prior art and propose an inclined core-pulling mechanism for an injection mold. The piston rod of the core-pulling oil cylinder moves horizontally, and through the cooperation of a driving gear and an inclined rack, the dowel pin is driven to achieve an inclined sliding action. Therefore, this inclined core-pulling mechanism reduces the space occupied by the entire injection mold.

[0004] The purpose of the utility model can be achieved by the following technical solutions: An inclined core-pulling mechanism for an injection mold, the injection mold includes a bottom plate, a vertical plate and a female mold. It is characterized in that the inclined core-pulling mechanism of the injection mold includes a triangular seat, a core-pulling oil cylinder, a dowel pin and a slider. The female mold is provided with an inclined sliding hole for the dowel pin to slide. The vertical plate and the triangular seat are fixed on the bottom plate, the female mold is fixed on the vertical plate, and an embedding groove for the triangular seat to be embedded is opened at the lower end of the female mold. A strip-shaped seat abutted against the triangular seat is also fixed on the bottom plate. The core-pulling oil cylinder is fixed at one end of the strip-shaped seat. A strip-shaped chute is opened on the strip-shaped seat along the length direction of the strip-shaped seat. A horizontal rack slides in the strip-shaped chute. The horizontal rack is connected to the telescopic rod of the core-pulling oil cylinder through a linkage block. An inclined chute is opened on the inclined surface of the triangular seat. An inclined rack slides in the inclined chute. A gear set for realizing the linkage between the horizontal rack and the inclined rack and driving the inclined rack to slide along the inclined chute of the triangular seat is arranged in the triangular seat. The slider is fixed at the upper end of the inclined rack, the dowel pin is fixed at the front end of the slider, a through hole is opened at the bottom of the inclined chute, and the driving gear passes through the through hole and meshes with the inclined rack.

[0005] Further, the gear set includes a driven gear rotatably disposed within the triangular base and a driving gear meshing with the driven gear. A driving gear is rotatably connected within the strip-shaped base and is located above the strip-shaped chute. The driving gear meshes with the transverse rack. Both the driven gear and the driving gear are fixedly sleeved on a synchronous shaft and rotate synchronously.

[0006] Further, retaining edges are respectively fixed on both sides of the inclined chute, and the side wall of the slider abuts against the retaining edges.

[0007] Further, a square positioning groove is formed on the bottom plate, and the triangular base is located within the square positioning groove.

[0008] Further, the ejector pin is in a sharp conical shape, a cooling water flow channel is formed within the ejector pin, and a water inlet and a water outlet of the cooling water flow channel are formed at the tail of the ejector pin.

[0009] Further, the slider includes a clamping portion and a main body. The tail of the ejector pin has an expanded step. The clamping portion is provided with a T-shaped hole for the step to be embedded. An inlet channel and an outlet channel communicating with the water inlet and the water outlet respectively are formed within the main body. The clamping portion is fixed to the front end of the main body by bolts.

[0010] The inlet channel and the outlet channel are communicated with an external circulating cold water system. The cooling water passes through the cooling water flow channel to take away the heat of the ejector pin, enabling the ejector pin to be quickly cooled.

[0011] Working process: After the punch and the die are closed, the ejector pin clamps the punch, and at this time, the material cannot be ejected. After the product is cooled and solidified, the oblique core-pulling mechanism is started. The core-pulling oil cylinder pulls the linkage block and the transverse rack. The transverse rack drives the driving gear to rotate. Since both the driven gear and the driving gear are fixed on the synchronous shaft, the driven gear also rotates accordingly, driving the driving gear to rotate. The driving gear meshes with the oblique rack, driving the oblique rack and the slider to slide downward along the inclined chute. The slider drives the ejector pin to withdraw from the punch and the die. At this time, the punch can be separated from the die, and the injection-molded product can be taken out.

[0012] Compared with the prior art, the oblique core-pulling mechanism of this injection mold has the following advantages:

[0013] 1. If the core-pulling oil cylinder is obliquely arranged, it is bound to occupy the space obliquely below the bottom plate during the movement. However, in this application, the piston rod of the core-pulling oil cylinder moves horizontally in the transverse direction. Through the cooperation of the driving gear and the oblique rack, the ejector pin is driven to perform an oblique sliding action. Therefore, this oblique core-pulling mechanism reduces the overall occupied height of the mold. Since the height of the mold needs to match the corresponding injection molding machine specifications, the required tonnage of the injection molding machine is also reduced.

[0014] 2. A cooling water flow channel is provided within the ejector pin, enabling the ejector pin to be quickly cooled.

[0015] 3. The structure is simple and firm, and the slider moves smoothly, steadily, and uniformly. Brief Description of the Drawings

[0016] Figure 1 is the assembly drawing of the inclined core-pulling mechanism of this injection mold and the injection mold.

[0017] Figure 2 is the three-dimensional structure diagram of the inclined core-pulling mechanism of this injection mold.

[0018] Figure 3 is the structural schematic diagram of the inclined core-pulling mechanism of this injection mold after removing the triangular seat.

[0019] Figure 4 is the structural schematic diagram of the insert pin.

[0020] Figure 5 is the sectional view after the insert pin and the slider are assembled.

[0021] In the figure, 1, bottom plate; 2, vertical plate; 3, female mold; 31, embedding groove; 4, triangular seat; 41, inclined sliding groove; 5, core-pulling oil cylinder; 6, insert pin; 61, cooling water flow channel; 62, water inlet; 63, water outlet; 64, step; 7, slider; 71, clamping part; 72, main body; 73, water inlet channel; 74, water outlet channel; 75, T-shaped hole; 8, strip seat; 81, strip sliding groove; 9, horizontal rack; 10, linkage block; 11, driving gear; 12, driven gear; 13, synchronizing shaft; 14, driving gear; 15, inclined rack; 16, retaining edge. Detailed Description of the Preferred Embodiments

[0022] The following are specific embodiments of the present invention and in combination with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0023] As Figure 1 shown, the injection mold includes a bottom plate 1, a vertical plate 2 and a female mold 3. The inclined core-pulling mechanism of this injection mold includes a triangular seat 4, a core-pulling oil cylinder 5, an insert pin 6 and a slider 7. An inclined sliding hole for the insert pin 6 to slide is opened on the female mold 3. The vertical plate 2 and the triangular seat 4 are fixed on the bottom plate 1, and the female mold 3 is fixed on the vertical plate 2. An embedding groove 31 for the triangular seat 4 to be embedded is opened at the lower end of the female mold 3. A strip seat 8 abutted against the triangular seat 4 is also fixed on the bottom plate 1, and the core-pulling oil cylinder 5 is fixed at one end of the strip seat 8.

[0024] As Figure 2 、 Figure 3As shown in the figure, a strip-shaped chute 81 is formed in the strip-shaped seat 8 along the length direction of the strip-shaped seat 8. A transverse rack 9 slides in the strip-shaped chute 81. The transverse rack 9 is connected to the telescopic rod of the core-pulling oil cylinder 5 through a linkage block 10. An inclined chute 41 is formed on the inclined surface of the triangular seat 4. An inclined rack 15 slides in the inclined chute 41. A gear set is provided in the triangular seat 4 to realize the linkage between the transverse rack 9 and the inclined rack 15 and drive the inclined rack 15 to slide along the inclined chute 41 of the triangular seat 4. The gear set includes a driven gear 12 rotatably provided in the triangular seat 4 and a driving gear 14 meshing with the driven gear 12. A driving gear 11 is rotatably connected in the strip-shaped seat 8 above the strip-shaped chute 81. The driving gear 11 meshes with the transverse rack 9. Both the driven gear 12 and the driving gear 11 are fixedly sleeved on a synchronous shaft 13 and rotate synchronously. The slider 7 is fixed to the upper end of the inclined rack 15. The insert pin 6 is fixed to the front end of the slider 7. A through hole is formed at the bottom of the inclined chute 41. The driving gear 14 passes through the through hole and meshes with the inclined rack 15. Stopping edges 16 are respectively fixed on both sides of the inclined chute 41. The side wall of the slider 7 abuts against the stopping edges 16. A square positioning groove is formed on the bottom plate 1. The triangular seat 4 is located in the square positioning groove.

[0025] As Figure 4 , Figure 5 shown, the insert pin 6 is in a pointed cone shape. A cooling water flow channel 61 is formed in the insert pin 6. An inlet 62 and an outlet 63 of the cooling water flow channel 61 are formed at the tail of the insert pin 6.

[0026] The slider 7 includes a clamping part 71 and a main body 72. The tail of the insert pin 6 has an expanded step 64. The clamping part 71 is provided with a T-shaped hole 75 for the step 64 to be embedded. An inlet channel 73 and an outlet channel 74 respectively communicating with the inlet 62 and the outlet 63 are formed in the main body 72. The clamping part 71 is fixed to the front end of the main body 72 through bolts.

[0027] The inlet channel 73 and the outlet channel 74 are communicated with an external circulating cold water system. The cooling water passes through the cooling water flow channel 61 to take away the heat of the insert pin 6, so that the insert pin 6 can be quickly cooled.

[0028] Working process: After the punch and the die 3 are closed, the insert pin 6 clamps the punch. At this time, the material cannot be ejected. After the product is cooled and solidified, the inclined core-pulling mechanism is started. The core-pulling oil cylinder 5 pulls the linkage block 10 and the transverse rack 9. The transverse rack 9 drives the driving gear 11 to rotate. Since both the driven gear 12 and the driving gear 11 are fixed on the synchronous shaft 13, the driven gear 12 also rotates accordingly, driving the driving gear 14 to rotate. The driving gear 14 meshes with the inclined rack 15, driving the inclined rack 15 and the slider 7 to slide downward along the inclined chute 41. The slider 7 drives the insert pin 6 to withdraw from the punch and the die 3. At this time, the punch can be separated from the die 3, and the injection-molded product can be taken out.

[0029] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar means for substitution, without departing from the spirit of the present utility model or exceeding the scope defined by the appended claims.

Claims

1. An inclined core-pulling mechanism for an injection mold. The injection mold includes a bottom plate (1), a vertical plate (2), and a female mold (3), characterized in that, The oblique core-pulling mechanism of this injection mold includes a triangular seat (4), a core-pulling oil cylinder (5), a dowel pin (6) and a slider (7). An inclined sliding hole for the dowel pin (6) to slide is provided on the concave mold (3). The vertical plate (2) and the triangular seat (4) are fixed on the bottom plate (1), and the concave mold (3) is fixed on the vertical plate (2). An embedding groove (31) for the triangular seat (4) to be embedded is provided at the lower end of the concave mold (3). A strip-shaped seat (8) that abuts against the triangular seat (4) is also fixed on the bottom plate (1). The core-pulling oil cylinder (5) is fixed at one end of the strip-shaped seat (8). A strip-shaped chute (81) is provided on the strip-shaped seat (8) along the length direction of the strip-shaped seat (8). A transverse rack (9) slides in the strip-shaped chute (81). The transverse rack (9) is connected to the telescopic rod of the core-pulling oil cylinder (5) through a linkage block (10). An inclined chute (41) is provided on the inclined surface of the triangular seat (4). An inclined rack (15) slides in the inclined chute (41). A gear set is provided in the triangular seat (4) to realize the linkage between the transverse rack (9) and the inclined rack (15) and drive the inclined rack (15) to slide along the inclined chute (41) of the triangular seat (4). The slider (7) is fixed at the upper end of the inclined rack (15), and the dowel pin (6) is fixed at the front end of the slider (7). A through hole is provided at the bottom of the inclined chute (41), and the driving gear (14) passes through the through hole and meshes with the inclined rack (15).

2. The oblique core-pulling mechanism of an injection mold according to claim 1, characterized in that, The gear set includes a driven gear (12) rotatably provided in the triangular seat (4) and a driving gear (14) meshing with the driven gear (12). A driving gear (11) is rotatably connected in the strip-shaped seat (8) above the strip-shaped chute (81). The driving gear (11) meshes with the transverse rack (9). The driven gear (12) and the driving gear (11) are both fixedly sleeved on a synchronous shaft (13) and rotate synchronously.

3. The inclined core-pulling mechanism of an injection mold according to claim 1, characterized in that, Blocking edges (16) are respectively fixed on both sides of the inclined chute (41), and the side wall of the slider (7) abuts against the blocking edges (16).

4. The inclined core-pulling mechanism of an injection mold according to claim 1, characterized in that, A square positioning groove is provided on the bottom plate (1), and the triangular seat (4) is located in the square positioning groove.

5. The oblique core-pulling mechanism of an injection mold according to claim 1, characterized in that, The dowel pin (6) is in a sharp conical shape. A cooling water flow channel (61) is provided in the dowel pin (6). An inlet (62) and an outlet (63) of the cooling water flow channel (61) are provided at the tail of the dowel pin (6).

6. The inclined core-pulling mechanism of an injection mold according to claim 5, characterized in that, The slider (7) includes a clamping part (71) and a main body (72). The tail of the dowel pin (6) has an expanded step (64). The clamping part (71) is provided with a T-shaped hole (75) for the step (64) to be embedded. An inlet channel (73) and an outlet channel (74) respectively communicating with the inlet (62) and the outlet (63) are provided in the main body (72). The clamping part (71) is fixed to the front end of the main body (72) by bolts.

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