A display housing injection mold with sprue material removal function

Abstract

The invention discloses an injection mold for a display shell with a sprue material cutting function, which belongs to the technical field of injection molds and comprises a front mold, a rear mold, an external gate and a sprue cutting mechanism, wherein the front mold is clamped on the rear mold, the external gate is arranged on the front mold, and the external gate is connected with the rear mold and the cavity in the front mold, the sprue cutting mechanism is arranged in the rear mold, and the sprue cutting mechanism abuts against the sprue channel connecting the cavity; the invention controls a first lifting cylinder to descend through a first oil circuit and draws a cutter out of a guide sleeve, controls a second oil circuit to rotate a rotating cylinder and drives a cutter disc to rotate, and the cutter disc rotates to send different cutters to the bottom of the guide sleeve, controls a first lifting cylinder to ascend through the first oil circuit and inserts the cutter into the guide sleeve, and the cutter can be replaced without disassembling the injection mold, thereby avoiding the situation where the machine stops and delays production, and the replacement operation process is simple and convenient, saving labor costs and working time costs.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molds, and in particular relates to an injection mold for a display housing with a sprue material cutting function. Background Art

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. The advantages of the injection molding method are fast production speed, high efficiency, automated operation, a wide variety of colors, shapes from simple to complex, sizes from large to small, and precise product size. The product is easy to update and can be made into parts with complex shapes. Injection molding is suitable for mass production and molding fields such as complex-shaped products. This process is also used in the molding of display shells, but after injection molding, a sprue will be left on the display shell, which needs to be manually processed and removed after the display shell is demolded, wasting labor costs. Therefore, the mold structure of the sprue cut inside the injection mold has been widely used.

[0003] A Chinese patent (CN201721414328.3) discloses an injection mold for an in-mold water gate, comprising a rear mold, a product cavity partially arranged on the rear mold, a water gate connected to the product cavity, and a cutter system, wherein the cutter system is arranged on the rear mold, and comprises a micro-cylinder, an L-shaped cutter, a cutter upper seat, and a cutter lower seat connected to the cutter upper seat; the top of the L-shaped cutter is arranged on the water gate, and the bottom is connected to the cutter upper seat; the micro-cylinder is connected to the cutter lower seat, and the micro-cylinder has an oil inlet joint and an exhaust joint.

[0004] At present, the cutter system in the injection mold usually uses a single cutter for cutting the water outlet. However, due to the change of injection molding materials, there are different requirements for the type of water outlet cutter and the inclination of the blade to meet the flatness of the cut surface. This requires the cutter to be replaced. When replacing the cutter of the existing injection mold, the front mold or the rear mold needs to be removed and the corresponding components need to be dismantled before the cutter can be replaced, resulting in a cumbersome cutter replacement operation process and a waste of manpower. In addition, the injection mold needs to be removed when replacing the cutter, which will delay production hours and cause a waste of working hours. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that when the cutter of the injection mold needs to be replaced, the injection mold needs to be disassembled, resulting in a cumbersome replacement operation process, a waste of manpower and working hours, and to propose a display housing injection mold with a sprue material cutting function.

[0006] In order to achieve the above-mentioned object, the present invention adopts the following technical scheme: a display housing injection mold with a gate material cutting function, comprising a front mold, a rear mold, an external gate and a gate cutting mechanism, the front mold is clamped on the rear mold, the external gate is arranged on the front mold, and the external gate communicates with the rear mold and the cavity in the front mold, the gate cutting mechanism is arranged in the rear mold, and the gate cutting mechanism abuts against the gate channel communicating with the cavity;

[0007] The water outlet cutting mechanism includes a first lifting mechanism, a rotating mechanism, a second lifting mechanism, a knife disc, a guide sleeve and a plurality of cutting knives. The first lifting mechanism is fixedly arranged in the rear mold, the rotating mechanism is fixedly installed on the first lifting mechanism, the second lifting mechanism is fixedly installed on the rotating mechanism, the knife disc is fixedly arranged on the second lifting mechanism, a plurality of the cutting knives are fixedly installed on the knife disc, the knife disc is disc-shaped, and a plurality of the cutting knives are arranged in a circular array along the axis of the knife disc. The guide sleeve is fixedly arranged on the rear mold, the cutting knife passes through the guide sleeve and abuts against the water outlet channel, a guide mechanism is arranged in the guide sleeve, and the guide mechanism abuts against the cutting knife.

[0008] As a further description of the above technical solution:

[0009] The first lifting mechanism includes a first lifting cylinder, and the first lifting cylinder is connected to the outside of the rear mold through a first oil path.

[0010] As a further description of the above technical solution:

[0011] The rotating mechanism comprises a rotating oil cylinder, the axis of which coincides with the axis of the cutter disc, and the rotating oil cylinder is connected to the outside of the rear mold through a second oil passage.

[0012] As a further description of the above technical solution:

[0013] The second lifting mechanism includes a second lifting cylinder, and the second lifting cylinder is connected to the outside of the rear mold through a third oil path.

[0014] As a further description of the above technical solution:

[0015] A clearance groove is provided in the rear mold, and the clearance groove is located around the guide sleeve. A single cutter is inserted into the guide sleeve, and the other multiple cutters are arranged in the clearance groove.

[0016] As a further description of the above technical solution:

[0017] The lifting travel distance of the first lifting mechanism is not less than the height of the guide sleeve.

[0018] As a further description of the above technical solution:

[0019] The guide mechanism comprises a guide ring and a spring. The guide ring slides in the guide sleeve. Two ends of the spring are fixedly connected to the top surface of the guide ring and the top of the guide sleeve. The cutter passes through the guide ring.

[0020] As a further description of the above technical solution:

[0021] Slide blocks are arranged on both sides of the guide ring, and a slide groove is provided on the inner wall of the guide sleeve, and the slide blocks slide in the slide groove.

[0022] As a further description of the above technical solution:

[0023] The bottom of the cutter is provided with a positioning boss, the bottom of the guide ring is provided with a positioning groove, and the positioning boss is clamped in the positioning groove.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0025] 1. In the present invention, the first oil circuit controls the first lifting cylinder to descend and pull the cutter out of the guide sleeve, the second oil circuit controls the rotating cylinder to rotate and drives the cutter disc to rotate, the cutter disc rotates to send different cutters to the bottom of the guide sleeve, the first oil circuit controls the first lifting cylinder to rise and insert the cutter into the guide sleeve, the cutter can be replaced without disassembling the injection mold, avoiding the situation where the machine is stagnant and delays production, the replacement operation process is simple and convenient, saving labor costs and working time costs.

[0026] 2. In the present invention, the second lifting cylinder is controlled to rise through the third oil circuit, and the cutter cuts the plastic in the nozzle channel under the action of the second lifting cylinder, thereby realizing the nozzle removal in the mold, and the structural design is reasonable.

[0027] 3. In the present invention, the positioning boss on the cutter is positioned by the positioning groove on the guide ring, and the slide groove on the guide sleeve guides the slider on the guide ring, so that the cutter can be lifted and lowered smoothly in the guide sleeve, which is beneficial to the smooth cutting of the water outlet and has a good cutting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The figure is a schematic diagram of the overall structure of a display housing injection mold with a sprue material cutting function.

[0029] Figure 2 The figure is a schematic diagram of the internal structure of a display housing injection mold with a sprue material cutting function.

[0030] Figure 3 for Figure 2 A partial enlarged view of part A.

[0031] Figure 4 The present invention is a schematic diagram of a cutter disc structure in which a plurality of cutters are installed in an injection mold for a display housing having a sprue material cutting function.

[0032] Figure 5 The present invention is a schematic diagram of the internal structure of a guide sleeve in an injection mold for a display housing with a sprue material cutting function.

[0033] Legend:

[0034] 1. Front mold; 2. Back mold; 3. External gate; 4. Water gate cutting mechanism; 41. First lifting mechanism; 42. Rotating mechanism; 43. Second lifting mechanism; 44. Cutter head; 45. Guide sleeve; 46. Cutter; 5. Cavity; 6. Water gate channel; 7. Guide mechanism; 71. Guide ring; 72. Spring; 8. First lifting cylinder; 9. First oil circuit; 10. Rotating cylinder; 11. Second oil circuit; 12. Second lifting cylinder; 13. Third oil circuit; 14. Avoidance groove; 15. Slider; 16. Slide groove; 17. Positioning boss; 18. Positioning groove. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1-5 The present invention provides a technical solution: a display housing injection mold with a gate material cutting function, comprising a front mold 1, a rear mold 2, an external gate 3 and a gate cutting mechanism 4, wherein the front mold 1 is clamped on the rear mold 2, the external gate 3 is arranged on the front mold 1, and the external gate 3 communicates with the rear mold 2 and a cavity 5 in the front mold 1, the gate cutting mechanism 4 is arranged in the rear mold 2, and the gate cutting mechanism 4 abuts against a gate channel 6 communicating with the cavity 5;

[0037] The water inlet mechanism 4 includes a first lifting mechanism 41, a rotating mechanism 42, a second lifting mechanism 43, a knife disc 44, a guide sleeve 45 and a plurality of cutters 46, wherein the first lifting mechanism 41 is fixedly arranged in the rear mold 2, the rotating mechanism 42 is fixedly mounted on the first lifting mechanism 41, the second lifting mechanism 43 is fixedly mounted on the rotating mechanism 42, the knife disc 44 is fixedly arranged on the second lifting mechanism 43, a plurality of the cutters 46 are fixedly mounted on the knife disc 44, the knife disc 44 is disc-shaped, and a plurality of the cutters 46 are arranged in a circular array along the axis of the knife disc 44, the guide sleeve 45 is fixedly arranged on the rear mold 2, the cutter 46 passes through the guide sleeve 45 and abuts against the water inlet channel 6, a guide mechanism 7 is arranged in the guide sleeve 45, and the guide mechanism 7 abuts against the cutter 46;

[0038] The first lifting mechanism 41 includes a first lifting cylinder 8, which is connected to the outside of the rear mold 2 through a first oil circuit 9. The first oil circuit 9 controls the first lifting cylinder 8, so that the lifting of the first lifting cylinder 8 drives the rotating cylinder 10 and the second lifting cylinder 12 to descend together, and the cutter 46 is pulled out of the guide sleeve 45, providing space for the subsequent rotation of the cutter disc 44, thereby ensuring that the guide sleeve 45 and the cutter 46 do not interfere with each other when changing the cutter.

[0039] The rotating mechanism 42 includes a rotating cylinder 10, the axis of which coincides with the axis of the cutter disc 44, the rotating cylinder 10 is connected to the outside of the rear mold 2 via a second oil circuit 11, the second oil circuit 11 controls the rotation of the rotating cylinder 10, the rotating cylinder 10 drives the cutter disc 44 to rotate together, the axis of the rotating cylinder 10 coincides with the axis of the cutter disc 44, ensuring that different cutters 46 of the cutter disc 44 can be aligned with the guide sleeve 45 after rotation, which is conducive to the smooth replacement of the cutter 46;

[0040] The second lifting mechanism 43 includes a second lifting cylinder 12, which is connected to the outside of the rear mold 2 through a third oil circuit 13. The third oil circuit 13 controls the lifting of the second lifting cylinder 12. The lifting of the second lifting cylinder 12 drives the cutter 46 to lift along the guide sleeve 45 and insert it into the nozzle channel 6, so as to realize the in-mold cutting of the nozzle.

[0041] The rear mold 2 is provided with an escape groove 14, and the escape groove 14 is located around the guide sleeve 45. A single cutter 46 is inserted into the guide sleeve 45, and the other cutters 46 are arranged in the escape groove 14, which is conducive to ensuring that there is no interference between the cutter 46 and the guide sleeve 45, and ensuring smooth replacement of the cutter 46;

[0042] The lifting distance of the first lifting mechanism 41 is not less than the height of the guide sleeve 45. When the first lifting mechanism 41 is lowered to the lowest point, it is ensured that the cutter 46 is completely pulled out of the guide sleeve 45. When the cutter disc 44 rotates, there is no interference between the cutter 46 and the guide sleeve 45, which is conducive to the smooth replacement of the cutter 46.

[0043] The guide mechanism 7 includes a guide ring 71 and a spring 72. The guide ring 71 slides in the guide sleeve 45. The two ends of the spring 72 are fixedly connected to the top surface of the guide ring 71 and the top of the guide sleeve 45. The cutter 46 passes through the guide ring 71. Slide blocks 15 are provided on both sides of the guide ring 71. A slide groove 16 is provided on the inner wall of the guide sleeve 45. The slide block 15 slides in the slide groove 16. A positioning boss 17 is provided at the bottom of the cutter 46. A positioning groove 18 is provided at the bottom of the guide ring 71. The positioning boss 17 is clamped in the positioning groove 18. The positioning boss 17 is clamped in the positioning groove 18. The slide block 15 slides along the slide groove 16, which has a guiding and fixing effect on the sliding of the cutter 46, so that the cutter 46 is not affected by other external forces when it is lifted and lowered in the guide sleeve 45, ensuring that the cutter 46 slides smoothly along the guide sleeve 45, thereby ensuring that the water outlet is cut off smoothly.

[0044] Working principle: First, the front mold 1 is clamped on the rear mold 2, and plastic is injected from the external gate 3. The plastic enters the cavity 5 and the sprue channel 6 from the external gate. Secondly, the third oil circuit 13 controls the second lifting cylinder 12 to rise. At this time, the positioning boss 17 on the cutter 46 is clamped in the positioning groove 18 on the guide ring 71, and the slider 15 on the guide ring 71 slides along the slide groove 16 on the inner wall of the guide sleeve 45. The cutter 46 extends into the sprue channel 6 and cuts off the plastic at this location, thereby completing the sprue cutting in the mold. Then, the material of the plastic is replaced. Afterwards, it is necessary to use cutters 46 of different specifications, the first oil circuit 9 controls the first lifting cylinder 8 to descend and pull the cutter 46 out of the guide sleeve 45, the second oil circuit 11 controls the rotating cylinder 10 to rotate and drives the cutter disc 44 to rotate, and multiple cutters 46 rotate in the air avoidance groove 14, and the cutter disc 44 rotates to send cutters 46 of different specifications to the bottom of the guide sleeve 45, the first oil circuit 9 controls the first lifting cylinder 8 to rise and insert the cutter 46 into the guide sleeve 45, and the replacement of the cutter 46 is completed. Finally, the cutting effect of the replaced cutter 46 is tested.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A display housing injection mold with a sprue material removal function, characterized in that: The invention comprises a front mold (1), a rear mold (2), an external gate (3) and a water gate mechanism (4), wherein the front mold (1) is clamped on the rear mold (2), the external gate (3) is arranged on the front mold (1), and the external gate (3) communicates with the rear mold (2) and the mold cavity (5) in the front mold (1), and the water gate mechanism (4) is arranged in the rear mold (2), and the water gate mechanism (4) abuts against a water gate channel (6) communicating with the mold cavity (5); The water-cutting mechanism (4) comprises a first lifting mechanism (41), a rotating mechanism (42), a second lifting mechanism (43), a knife disc (44), a guide sleeve (45) and a plurality of cutting knives (46), wherein the first lifting mechanism (41) is fixedly arranged in the rear mold (2), the rotating mechanism (42) is fixedly installed on the first lifting mechanism (41), the second lifting mechanism (43) is fixedly installed on the rotating mechanism (42), and the knife disc (44) is fixedly arranged on the second lifting mechanism (43). The mechanism (43) includes a plurality of cutting knives (46) fixedly mounted on the cutting disc (44), the cutting disc (44) being in the shape of a disc, and the plurality of cutting knives (46) being arranged in a circular array along the axis of the cutting disc (44), the guide sleeve (45) being fixedly mounted on the rear mold (2), the cutting knives (46) passing through the guide sleeve (45) and abutting against the water inlet channel (6), the guide sleeve (45) being provided with a guide mechanism (7), and the guide mechanism (7) abutting against the cutting knives (46).

2. The display housing injection mold with gate material cutting function according to claim 1, characterized in that: The first lifting mechanism (41) comprises a first lifting cylinder (8), and the first lifting cylinder (8) is connected to the outside of the rear mold (2) through a first oil passage (9).

3. The display housing injection mold with sprue cutting function according to claim 1, characterized in that: The rotating mechanism (42) comprises a rotating oil cylinder (10), the axis of which coincides with the axis of the cutter disc (44), and the rotating oil cylinder (10) is connected to the outside of the rear mold (2) via a second oil passage (11).

4. The display housing injection mold with sprue cutting function according to claim 1, characterized in that: The second lifting mechanism (43) comprises a second lifting cylinder (12), and the second lifting cylinder (12) is connected to the outside of the rear mold (2) through a third oil passage (13).

5. The display housing injection mold with sprue cutting function according to claim 1, characterized in that: A clearance groove (14) is provided in the rear mold (2), and the clearance groove (14) is located around the guide sleeve (45). A single cutting knife (46) is inserted into the guide sleeve (45), and the other plurality of cutting knives (46) are arranged in the clearance groove (14).

6. The display housing injection mold with sprue cutting function according to claim 1, characterized in that: The lifting travel distance of the first lifting mechanism (41) is not less than the height of the guide sleeve (45).

7. The display housing injection mold with sprue cutting function according to claim 1, characterized in that: The guide mechanism (7) comprises a guide ring (71) and a spring (72); the guide ring (71) slides in the guide sleeve (45); two ends of the spring (72) are fixedly connected to the top surface of the guide ring (71) and the top of the guide sleeve (45); and the cutter (46) passes through the guide ring (71).

8. The display housing injection mold with sprue cutting function according to claim 7, characterized in that: Slide blocks (15) are arranged on both sides of the guide ring (71), and a slide groove (16) is provided on the inner wall of the guide sleeve (45), and the slide block (15) slides in the slide groove (16).

9. The display housing injection mold with sprue cutting function according to claim 7, characterized in that: The bottom of the cutter (46) is provided with a positioning boss (17), the bottom of the guide ring (71) is provided with a positioning groove (18), and the positioning boss (17) is snap-fitted into the positioning groove (18).

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