Earphone shell injection mold

Abstract

The utility model relates to the related technical field of earphone shells, in particular to an earphone shell injection mold which comprises a supporting plate, and a demolding mechanism is arranged on the inner side of the supporting plate. According to the earphone shell injection mold, through the arrangement of the demolding mechanism, a driving motor drives a lead screw to rotate, a cam is promoted to rotate on the surface of the lead screw, an eccentric structure of the cam makes contact with and pushes a push plate, and the push plate overcomes friction force with the inner side of a supporting plate, linearly slides upwards along the inner side of the supporting plate and drives an ejector rod and an ejector plate to ascend; the ejector plate stably ejects the injection-molded earphone shell out of the mold cavity, the limiting blocks at the two ends of the push plate slide upwards in the limiting grooves, it is guaranteed that the push plate ascends stably, meanwhile, the reset spring is compressed to store elastic potential energy, and when the cam completes the pushing stroke, the reset spring releases the elastic potential energy, and downward elastic force is generated; and the push plate is pushed to slide downwards along the guide of the limiting groove, the ejector rod and the ejector plate are driven to fall back to the initial position, the limiting block returns synchronously, and a complete ejection and reset cycle is completed.

Description

TECHNICAL FIELD

[0001] The utility model relates to earphone shell technical field especially relates to earphone shell injection mold. BACKGROUND

[0002] Earphone is a pair of conversion unit, it accepts from the media player or the electric signal that the receiver sends, utilizes the loudspeaker close to the ear to convert it into audible sound wave, in the production and processing of earphone shell, usually need to use injection mold to form, therefore, particularly need a kind of earphone shell injection mold.

[0003] But the injection mold of traditional injection mold is formed after product, because of lacking suitable ejection mechanism and product from the inside of forming cavity, so that staff needs to spend certain time to be able to take out product from the inside of forming cavity, demoulding operation is more troublesome. UTILITY MODEL CONTENT

[0004] In view of the deficiency of prior art, the utility model provides an earphone shell injection mold, with the function of automatically ejecting the product after injection molding, solves the problem of demoulding operation of traditional injection mold being more troublesome.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] An earphone shell injection mold, including support plate, the bottom of support plate is installed with shock absorbing foot brace, the top of support plate is fixedly connected with workbench, the top of workbench is installed with support, the surface of workbench and support is provided with injection mechanism, the inner side of support plate is provided with demoulding mechanism, the demoulding mechanism includes ejector and reset device, and the angle of ejector after ejection is reset by reset device.

[0007] Preferably, the ejector includes driving motor, lead screw, cam, push plate, ejector rod and top plate, one side of the support plate is installed with driving motor, the output end of the driving motor is fixedly connected with lead screw, the surface of the lead screw is rotatably connected with cam, the inner side of the support plate is slidably connected with push plate, the top of the push plate is fixedly connected with ejector rod, the top end of the ejector rod is fixedly connected with top plate, and the surface of the push plate is provided with reset device.

[0008] Preferably, the reset device includes limiting block, limiting slot and reset spring, the two ends of the push plate are fixedly connected with limiting block, the inner side of the support plate is provided with limiting slot, the top of the push plate is fixedly connected with reset spring, and the other end of the reset spring is fixedly connected with the bottom of the workbench.

[0009] Preferably, the shock absorbing foot brace is provided with the same four groups on the bottom of the support plate, and is symmetrically distributed on the bottom of the two support plates with the central axis of the workbench.

[0010] Preferably, the injection molding mechanism comprises a hydraulic cylinder, a hydraulic rod, a fixed rod, a sliding groove, an auxiliary rod, a sliding block, a buffer spring, a movable plate, an upper mold, a lower mold and a forming cavity, the top of the support is provided with the hydraulic cylinder, the inside of the hydraulic cylinder is slidably connected with the hydraulic rod, the bottom of the support is fixedly connected with the fixed rod, the inner side of the fixed rod is provided with the sliding groove, the inside of the fixed rod is slidably connected with the auxiliary rod, the two sides of the auxiliary rod are fixedly connected with the sliding block, the outer side of the auxiliary rod is wound with the buffer spring, the bottom of the hydraulic rod and the auxiliary rod is fixedly connected with the movable plate, the bottom of the movable plate is provided with the upper mold, the upper of the workbench is fixedly connected with the lower mold, the inside of the lower mold is provided with the forming cavity.

[0011] Preferably, the auxiliary rod slides in the fixed rod through the sliding groove and the sliding block, and the outer wall size of the sliding block is consistent with the inner wall size of the sliding groove.

[0012] Preferably, the cam is provided with three groups at equal intervals on the surface of the lead screw, and the cam and the push plate are mutually attached.

[0013] Compared with the prior art, the earphone shell injection mold has the following beneficial effects: through the setting of the demolding mechanism, when the injection molding enters the demolding stage, the driving motor is electrified to rotate, drives the lead screw to rotate, makes the cam move linearly along the axial direction of the lead screw, the eccentric structure of the cam contacts and pushes the push plate, the push plate overcomes the friction force on the inner side of the supporting plate, slides linearly upward along the inner side of the supporting plate, drives the ejector rod and the top plate to rise, the top plate stably ejects the injection molded earphone shell from the mold cavity, in this process, the limiting blocks at the two ends of the push plate slide upward in the limiting grooves, ensure that the push plate rises stably, avoid deviation, at the same time, the reset spring is compressed to store elastic potential energy, when the cam completes the pushing stroke and no longer applies force, the reset spring releases the elastic potential energy, generates downward elastic force, pushes the push plate to slide downward along the limiting groove, drives the ejector rod and the top plate to fall back to the initial position, the limiting blocks are returned synchronously, complete a complete ejection and reset cycle, and prepare for the next demolding operation, so as to realize efficient and stable operation of the earphone shell demolding process, and solve the problem that the traditional injection mold demolding operation is relatively troublesome. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a schematic view of the appearance side structure of the utility model;

[0015] Figure 2 It is a schematic view of the injection molding mechanism structure of the utility model;

[0016] Figure 3 It is a schematic view of the demolding mechanism structure of the utility model;

[0017] Figure 4The utility model discloses Figure 2 Amplification structure schematic diagram at A place in the middle.

[0018] In the drawing: 1, support plate, 2, shock absorbing foot prop, 3, workbench, 4, support, 5, injection mechanism, 501, hydraulic cylinder, 502, hydraulic rod, 503, fixed rod, 504, sliding slot, 505, auxiliary rod, 506, sliding block, 507, buffer spring, 508, movable plate, 509, upper die, 510, lower die, 511, forming cavity, 6, stripping mechanism, 601, drive motor, 602, screw rod, 603, cam, 604, push plate, 605, ejector pin, 606, top plate, 607, limit block, 608, limit slot, 609, return spring. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0020] Please refer to Figures 1-4 A earphone shell injection mold, including support plate 1, the bottom of support plate 1 is installed with shock absorbing foot prop 2, the top of support plate 1 is fixedly connected with workbench 3, the top of workbench 3 is installed with support 4, and the surface of workbench 3 and support 4 is provided with injection mechanism 5, and the inner side of support plate 1 is provided with stripping mechanism 6, and stripping mechanism 6 includes ejection device and reset device.

[0021] In the embodiment, the ejection device includes a driving motor 601, a lead screw 602, a cam 603, a push plate 604, a jacking rod 605 and a top plate 606, one side of the support plate 1 is provided with the driving motor 601, the output end of the driving motor 601 is fixedly connected with the lead screw 602, the surface of the lead screw 602 is rotatably connected with the cam 603, the inner side of the support plate 1 is slidably connected with the push plate 604, the top plate 604 is fixedly connected with the jacking rod 605 above, the top end of the jacking rod 605 is fixedly connected with the top plate 606, the surface of the push plate 604 is provided with a reset device, through the setting of the ejection device, when the injection molding is completed and the demolding operation is needed, the driving motor 601 starts to work, the driving motor 601 is electrified to rotate, the output end drives the lead screw 602 to rotate, since the surface of the lead screw 602 is rotatably connected with the cam 603, the rotation of the lead screw 602 makes the cam 603 move linearly along the axial direction of the lead screw 602, with the movement of the cam 603, the eccentric structure gradually contacts and starts to push the push plate 604, the push plate 604 is pushed by the cam 603, overcomes the friction between the inner side of the support plate 1, and slides linearly upwards along the inner side of the support plate 1, at the same time, the push plate 604 moves upwards, drives the jacking rod 605 fixedly connected therewith to rise synchronously, the top plate 606 fixedly connected with the top end of the jacking rod 605 also moves upwards, the top plate 606 directly acts on the bottom of the earphone shell formed in the injection mold, through the continuous upward thrust of the top plate 606, the injection molded earphone shell is smoothly ejected from the cavity of the mold, the first step of demolding is completed, when the cam 603 completes the pushing stroke of the push plate 604, under the action of the reset device, the push plate 604, the jacking rod 605 and the top plate 606 will gradually fall back to the initial position, ready for the next demolding operation, so as to realize the efficient and stable demolding process of the earphone shell.

[0022] Further, the reset device comprises a limiting block 607, a limiting groove 608 and a reset spring 609, both ends of the push plate 604 are fixedly connected with the limiting block 607, the inner side of the support plate 1 is provided with the limiting groove 608, the top of the push plate 604 is fixedly connected with the reset spring 609, the other end of the reset spring 609 is fixedly connected to the bottom of the workbench 3, through the setting of the reset device, when the ejector device works, the driving motor 601 drives the screw rod 602 to rotate, so that the cam 603 pushes the push plate 604 to slide upward, at this time, the limiting block 607 fixedly connected to both ends of the push plate 604 slides upward in the limiting groove 608 provided in the inner side of the support plate 1, the limiting groove 608 plays a guiding and limiting role on the limiting block 607, which ensures that the push plate 604 can rise stably along a straight line and avoids deviation during movement, at the same time, the reset spring 609 fixedly connected to the top of the push plate 604 is compressed with the rising of the push plate 604, in the process of being compressed, the reset spring 609 stores elastic potential energy, when the cam 603 completes the pushing stroke of the push plate 604 and no longer applies an upward pushing force to the push plate 604, the reset spring 609 begins to release the elastic potential energy stored therein, the reset spring 609 generates a downward elastic force to push the push plate 604 to move downward, the push plate 604 slides downward along the guidance of the limiting groove 608 under the action of the reset spring 609, driving the ejector rod 605 and the ejector plate 606 to fall back together, with the falling back of the push plate 604, the ejector device gradually returns to the initial position, the limiting block 607 slides in the limiting groove 608 to the initial position, which ensures the accurate reset of the push plate 604.

[0023] Further, the damping foot support 2 is provided with the same four groups at the bottom of the support plate 1 and is symmetrically distributed at the bottom of the two groups of support plates 1 with the central axis of the workbench 3 as the center, through the setting of the damping foot support 2, the vibration generated by the mold can be uniformly dispersed to avoid excessive local stress, and the inside is usually made of elastic material, when the mold vibrates, the elastic material will elastically deform to absorb and buffer the vibration energy, thereby reducing the vibration amplitude transmitted to the ground.

[0024] Furthermore, the injection mechanism 5 comprises a hydraulic cylinder 501, a hydraulic rod 502, a fixed rod 503, a sliding groove 504, an auxiliary rod 505, a sliding block 506, a buffer spring 507, a movable plate 508, an upper mold 509, a lower mold 510 and a forming cavity 511, the top end of the support 4 is provided with the hydraulic cylinder 501, the inside of the hydraulic cylinder 501 is slidably connected with the hydraulic rod 502, the bottom of the support 4 is fixedly connected with the fixed rod 503, the inner side of the fixed rod 503 is provided with the sliding groove 504, the inside of the fixed rod 503 is slidably connected with the auxiliary rod 505, the two sides of the auxiliary rod 505 are fixedly connected with the sliding block 506, the outer side of the auxiliary rod 505 is wound with the buffer spring 507, the bottom of the hydraulic rod 502 and the auxiliary rod 505 is fixedly connected with the movable plate 508, the bottom of the movable plate 508 is provided with the upper mold 509, the upper side of the workbench 3 is fixedly connected with the lower mold 510, the inside of the lower mold 510 is provided with the forming cavity 511, through the setting of the injection mechanism 5, when the earphone shell injection work is needed, the injection mechanism 5 starts to work, first, the hydraulic cylinder 501 starts to work, it will apply hydraulic power to the hydraulic rod 502, push the hydraulic rod 502 to make linear sliding downward in the hydraulic cylinder 501, with the downward movement of the hydraulic rod 502, the movable plate 508 fixedly connected with the bottom will also move downward synchronously, since the movable plate 508 is also fixedly connected with the bottom of the auxiliary rod 505, the descent of the movable plate 508 will drive the auxiliary rod 505 to slide downward in the fixed rod 503, at this time, the sliding block 506 fixedly connected with the two sides of the auxiliary rod 505 will slide in the sliding groove 504 provided in the inner side of the fixed rod 503, the cooperation of the sliding groove 504 and the sliding block 506 plays a guiding and limiting role, which ensures that the auxiliary rod 505 and the movable plate 508 can move downward stably and accurately, avoids deviation, in the process of the downward sliding of the auxiliary rod 505, the buffer spring 507 wound on the outer side will be gradually compressed, the buffer spring 507 plays a buffering and damping role, it can reduce the impact force generated when the movable plate 508 moves downward, avoids violent collision of the upper mold 509 and the lower mold 510 when they are closed, thereby protecting the mold from being damaged, at the same time, it can also reduce noise, with the continuous descent of the movable plate 508, the upper mold 509 installed on the bottom of the movable plate 508 gradually approaches the lower mold 510 fixedly connected above the workbench 3, when they are completely closed, a closed space is formed between the upper mold 509 and the lower mold 510, that is, the forming cavity 511, then the prepared plastic raw materials are injected into the forming cavity 511 through a special feeding channel, the plastic raw materials gradually form the earphone shell consistent with the shape of the forming cavity 511 after cooling, solidification and other processes in the forming cavity 511, when the injection is completed and the plastic raw materials are fully cooled and formed, the hydraulic cylinder 501 works in reverse, pulls the hydraulic rod 502 to slide upward, the hydraulic rod 502 drives the movable plate 508, the auxiliary rod 505 and the upper mold 509 to move upward, separates the upper mold 509 from the lower mold 510, at this time,The buffer spring 507 gradually recovers to prepare for the next injection operation, and then the demolding mechanism 6 starts to work to push out the molded earphone shell from the molding cavity 511 of the lower mold 510, completing the entire injection molding process, and so on, to realize batch production of the earphone shell.

[0025] In addition, the auxiliary rod 505 slides in the fixed rod 503 through the sliding block 506 and the sliding groove 504, and the outer wall size of the sliding block 506 matches the inner wall size of the sliding groove 504. Through the arrangement of the sliding groove 504 and the sliding block 506, the stability and accuracy of the operation of the injection molding mechanism 5 are greatly improved. Since the outer wall size of the sliding block 506 matches the inner wall size of the sliding groove 504, the cooperation gap between the two is very small, which makes the auxiliary rod 505 slide in the fixed rod 503 strictly along the established track. During the injection molding process, when the hydraulic cylinder 501 pushes the hydraulic rod 502 to drive the movable plate 508 and the upper mold 509 to move up and down, the auxiliary rod 505 slides in the sliding groove 504 through the sliding block 506, which can effectively prevent the upper mold 509 from shifting or shaking laterally. In this way, the upper mold 509 and the lower mold 510 can be precisely docked when they are closed, ensuring the accuracy of the shape and size of the molding cavity 511, thereby improving the molding quality of the earphone shell. Moreover, this tightly fitted structure can also disperse the stress generated during the movement of the movable plate 508 and the upper mold 509, reduce the wear between components, and prolong the service life of the injection molding mechanism 5. At the same time, it also helps to reduce the noise and vibration generated during equipment operation, creating a relatively quiet and stable working environment for the operators.

[0026] It is worth noting that the cam 603 is arranged at equal intervals on the surface of the lead screw 602, and the cam 603 is in close contact with the push plate 604. Through the arrangement of the cam 603, the ejection action of the demolding mechanism 6 is more stable and efficient. When the driving motor 601 drives the lead screw 602 to rotate, the three sets of cams 603 will simultaneously move along the axial direction of the lead screw 602 and push the push plate 604. The three sets of cams 603 are arranged at equal intervals, which can simultaneously apply a pushing force at different positions of the push plate 604, making the force on the push plate 604 more uniform. Compared with the single cam pushing method, the three sets of cams 603 can avoid the inclination or jamming of the push plate 604 due to uneven force, ensuring that the push plate 604 can slide smoothly upward along the inner side of the support plate 1. During the process of pushing out the injection molded earphone shell from the mold cavity, the uniform pushing force can ensure that the force applied by the push plate 606 to the bottom of the earphone shell is evenly distributed, avoiding damage to the earphone shell due to excessive local force, improving the success rate of demolding and the yield of the earphone shell. Moreover, the coordinated work of the three sets of cams 603 can also speed up the ejection speed, improve the production efficiency, and make the entire demolding process more smooth and stable.

[0027] In use, before the device starts, it is necessary to ensure that each component is installed stably, the hydraulic oil, lubricating oil and other media are sufficient, and the connection line is correct and accurate, after the power is turned on, the operator inputs the corresponding instruction at the control console, sets the injection molding process parameters such as injection pressure, injection speed, pressure maintaining time, cooling time, etc., first, the injection mechanism 5 starts to work, the hydraulic cylinder 501 is powered on, the internal hydraulic oil is pushed down by the oil pump at the set pressure, the hydraulic rod 502 is driven to move downward, the movable plate 508 and the auxiliary rod 505 are synchronously moved downward, the sliding block 506 is accurately guided along the sliding groove 504, the upper mold 509 is ensured to approach the lower mold 510 vertically and stably, the buffer spring 507 buffers the closing impact force to avoid damage to the mold, after the upper and lower molds are closed to form a sealed forming cavity 511, the injection molding machine injects high-temperature molten plastic raw materials into the forming cavity 511 through the injection screw at high speed, the raw materials are filled and compacted in the cavity, the pressure is maintained during the pressure maintaining stage to make the plastic fully formed, then the cooling system is started, the circulating cooling liquid flows through the mold cooling pipeline to take away the heat and cool and solidify the plastic to form an earphone shell, when the cooling time is over, the injection mechanism 5 works in reverse, the hydraulic cylinder 501 pulls the hydraulic rod 502 to rise, driving the upper mold 509 to separate from the lower mold 510, and the buffer spring 507 resets, at this time, the demolding mechanism 6 starts to work, the driving motor 601 rotates, the lead screw 602 rotates to drive the three sets of cams 603 to move along the axial direction, and at the same time, uniform pushing force is applied to the push plate 604, the push plate 604 drives the ejector rod 605 and the top plate 606 to rise, stably ejecting the formed earphone shell from the forming cavity 511 of the lower mold 510, after the ejection is completed, the earphone shell is taken away manually or by a mechanical hand, after the cams 603 complete the stroke, the reset device works, the reset spring 609 releases the elastic potential energy to push the push plate 604 to fall back, and the limiting block 607 is guided back to the original position along the limiting groove 608, preparing for the next demolding, during the whole working process, the shock absorbing foot support 2 continuously works, the pressure impact during the working of the injection mechanism and the vibration generated by the action of the demolding mechanism are all transmitted to the shock absorbing foot support 2 through the supporting plate 1, the internal elastic material of the shock absorbing foot support 2 deforms to absorb the vibration energy and reduce the vibration transmission to the ground and the surrounding environment, ensuring the stable operation of the device and reducing the noise interference, and at the same time, prolonging the service life of the whole device, in this way, the device repeatedly performs the steps of injection molding, cooling and demolding to realize the efficient and high-quality batch production of the earphone shell.

[0028] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An earphone shell injection mold comprising a support plate (1), characterized in that: The bottom of the support plate (1) is provided with shock-absorbing foot supports (2), the upper side of the support plate (1) is fixedly connected with a workbench (3), the upper side of the workbench (3) is provided with a support (4), the surface of the workbench (3) and the support (4) is provided with an injection molding mechanism (5), and the inner side of the support plate (1) is provided with a demolding mechanism (6). The demolding mechanism (6) comprises an ejection device and a reset device, and the reset device resets the angle of the ejection device after ejection.

2. The earphone shell injection mold of claim 1, wherein: The ejection device comprises a driving motor (601), a screw rod (602), a cam (603), a push plate (604), a top rod (605) and a top plate (606), one side of the support plate (1) is provided with the driving motor (601), the output end of the driving motor (601) is fixedly connected with the screw rod (602), the surface of the screw rod (602) is rotatably connected with the cam (603), the inner side of the support plate (1) is slidably connected with the push plate (604), the upper side of the push plate (604) is fixedly connected with the top rod (605), the top end of the top rod (605) is fixedly connected with the top plate (606), and the surface of the push plate (604) is provided with the reset device.

3. The earphone shell injection mold of claim 2, wherein: The reset device comprises a limiting block (607), a limiting groove (608) and a reset spring (609), both ends of the push plate (604) are fixedly connected with the limiting block (607), the inner side of the support plate (1) is provided with the limiting groove (608), and the upper side of the push plate (604) is fixedly connected with the reset spring (609), and the other end of the reset spring (609) is fixedly connected to the bottom of the workbench (3).

4. The earphone shell injection mold of claim 1, wherein: The shock-absorbing foot supports (2) are arranged in four groups on the bottom of the support plate (1) and are symmetrically distributed on the bottom of the two support plates (1) with the central axis of the workbench (3) as the center.

5. The earphone shell injection mold of claim 1, wherein: The injection molding mechanism (5) comprises a hydraulic cylinder (501), a hydraulic rod (502), a fixed rod (503), a sliding groove (504), an auxiliary rod (505), a sliding block (506), a buffer spring (507), a movable plate (508), an upper mold (509), a lower mold (510) and a forming cavity (511), the top end of the support (4) is provided with the hydraulic cylinder (501), the inner side of the hydraulic cylinder (501) is slidably connected with the hydraulic rod (502), the bottom of the support (4) is fixedly connected with the fixed rod (503), the inner side of the fixed rod (503) is provided with the sliding groove (504), the inner side of the fixed rod (503) is slidably connected with the auxiliary rod (505), both sides of the auxiliary rod (505) are fixedly connected with the sliding block (506), the outer side of the auxiliary rod (505) is wound with the buffer spring (507), the bottom of the hydraulic rod (502) and the auxiliary rod (505) are fixedly connected with the movable plate (508), the bottom of the movable plate (508) is provided with the upper mold (509), the upper side of the workbench (3) is fixedly connected with the lower mold (510), and the inner side of the lower mold (510) is provided with the forming cavity (511).

6. The earphone shell injection mold of claim 5, wherein: The auxiliary rod (505) slides in the interior of the fixed rod (503) through the sliding block (506) and the sliding groove (504), and the outer wall size of the sliding block (506) is consistent with the inner wall size of the sliding groove (504).

7. The earphone shell injection mold of claim 2, wherein: Three groups of the cam (603) are equidistantly arranged on the surface of the screw rod (602), and the cam (603) and the push plate (604) are mutually attached.

Images