Injection mold for plastic shell of loudspeaker box

Abstract

The utility model discloses a loudspeaker box plastic shell injection mold which comprises a lower mold, a mold groove is formed in the top of the lower mold, a containing groove is formed in the middle of the bottom of the mold groove, an ejector plate is arranged in the containing groove, an ejector mechanism is arranged below the ejector plate, and first supports are fixedly installed on the left side and the right side of the lower mold respectively. An auxiliary demolding mechanism is arranged above the first support, a second support is fixedly installed on the rear side of the lower mold, and a push-out mechanism is arranged above the second support. The auxiliary demolding mechanism is designed, the auxiliary demolding mechanism drives a transmission rod and a cam to rotate through a second motor, additional power is provided for the demolding process by means of impact force generated by contact of the cam and a check block, and the problem that demolding is difficult due to mold adhesion or product deformation is solved advantageously; and the ejection mechanism is adopted to realize automatic ejection of the loudspeaker box plastic shell through cooperation of a bidirectional screw rod and a moving block and transmission of a lifting plate and a stand column, so that the demolding efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, more specifically, the utility model relates to a kind of sound box plastic shell injection mold. BACKGROUND

[0002] In the field of injection mold, with the continuous growth of plastic product demand and the continuous progress of manufacturing technology, the performance requirements of injection mold are also higher and higher. As an important part of electronic products, the quality and production efficiency of sound box plastic shell directly affect the market competitiveness of products and the economic benefit of enterprises. In the production process of sound box plastic shell, the demolding efficiency of mold, product quality and automation degree become important indicators to measure the performance of mold.

[0003] In the injection molding process, due to the adhesion of plastic material itself and the microstructure of mold surface, adhesion force is often generated between sound box plastic shell and mold, which makes the demolding process difficult, which not only prolongs the production cycle, but also may damage the product due to forced demolding, affects the product quality, and the traditional injection mold demolding process mostly relies on manual operation, with low automation degree, resulting in low production efficiency and high labor intensity of operators. The above problems are studied, and the device is invented. SUMMARY

[0004] In order to overcome the above defects of prior art, the utility model provides a kind of sound box plastic shell injection mold to solve the problems raised in the above background art.

[0005] In order to achieve the above purpose, the utility model provides the following technical scheme: a kind of sound box plastic shell injection mold, including lower mold, lower mold top is provided with mold slot, mold slot bottom middle position is provided with accommodating groove, accommodating groove is provided with ejector plate, ejector plate below is provided with ejector mechanism, lower mold left and right sides are both fixedly installed with one support, one support top is provided with auxiliary demolding mechanism, lower mold rear side is fixedly installed with two supports, two supports top is provided with push-out mechanism.

[0006] Further, lower mold top four corners are all fixedly installed with slide rod, lower mold top is provided with upper mold, upper mold four corners are all provided with connecting hole corresponding with slide rod, upper mold middle position is provided with multiple injection ports.

[0007] Further, the ejection mechanism comprises a bidirectional screw rod rotatably installed on the lower mold, a first motor is arranged on the lower mold, and the output shaft of the first motor is connected with the bidirectional screw rod, moving blocks are threadedly connected on the two sides of the bidirectional screw rod, a guide rod is fixedly installed on the lower mold and penetrates through the moving blocks, a lifting plate is arranged above the bidirectional screw rod, connecting blocks are fixedly installed on the two sides of the bottom of the lifting plate, support rods are movably installed between the moving blocks and the connecting blocks of the same side, a stand is fixedly installed at the middle position of the top of the lifting plate, and the stand is connected with the ejection plate.

[0008] Further, the auxiliary demolding mechanism comprises a rack fixedly installed on the top outer side of the first support, a transmission rod is rotatably installed on the rack, a second motor is arranged on the rack, and the output shaft of the second motor is connected with the transmission rod, a cam is fixedly installed on the transmission rod, a rack plate is fixedly installed on the top inner side of the first support, a moving rod is slidably installed on the rack plate, a striking block is fixedly installed on the inner end of the moving rod, a blocking block is fixedly installed on the outer end of the moving rod, and a spring is arranged between the rack plate and the blocking block.

[0009] Further, the striking block is in a spherical structure, and the blocking block is in a circular truncated cone structure.

[0010] Further, the pushing mechanism comprises a plurality of air cylinders arranged above the second support, and the piston rods of the plurality of air cylinders are connected with a push plate.

[0011] Compared with the prior art, the utility model has the advantages that:

[0012] 1. The auxiliary demolding mechanism is driven by the second motor to rotate the transmission rod and the cam, the striking force generated by the contact between the cam and the blocking block provides additional power for the demolding process, which helps to solve the demolding difficulty problem caused by the adhesion of the mold or the deformation of the product, and improves the success rate of demolding and the product quality.

[0013] 2. The ejection mechanism is used to automatically eject the plastic shell of the sound box through the cooperation of the bidirectional screw rod and the moving block, and the transmission of the lifting plate and the stand, which not only improves the demolding efficiency, but also reduces the labor intensity of the operator; the pushing mechanism is designed, which uses a plurality of air cylinders to push the push plate to move, so that the plastic shell of the sound box is completely pushed out, which not only has a simple structure and is easy to operate, but also can ensure that the product is smoothly and quickly pushed out, avoiding damage or deformation caused by improper pushing. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0015] Figure 1 The overall structure schematic view is provided for the utility model;

[0016] Figure 2 The overall structure top view is provided for the utility model;

[0017] Figure 3 The overall structure side view is provided for the utility model;

[0018] Figure 4 The structure schematic view of the ejection mechanism is provided for the utility model;

[0019] Figure 5 The structure top view of the lower mold is provided for the utility model;

[0020] Figure 6 The connection schematic view of the ejection plate and the ejection mechanism is provided for the utility model.

[0021] Mark explanation:

[0022] 1, lower mold; 2, slide bar; 3, upper mold; 4, injection port; 5, mold groove; 6, containing groove; 7, ejection plate; 8, ejection mechanism; 801, bidirectional screw; 802, No. 1 motor; 803, moving block; 804, guide rod; 805, lifting plate; 806, connecting block; 807, support rod; 808, column; 9, No. 1 support; 10, auxiliary demolding mechanism; 1001, rack; 1002, transmission rod; 1003, No. 2 motor; 1004, cam; 1005, shelf plate; 1006, moving rod; 1007, impact block; 1008, stop block; 1009, spring; 11, No. 2 support; 12, push-out mechanism; 1201, air cylinder; 1202, push plate. Specific implementation

[0023] The implementation of the utility model is described by specific embodiments below, and those skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in the specification. Obviously, the described embodiments are part of the embodiments of the utility model, not all. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0024] In order to make those skilled in the art better understand the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0025] Embodiment:

[0026] Refer to the drawings Figure 1The embodiment is a loudspeaker plastic shell injection mold, which comprises a lower mold 1, a slide rod 2 is fixedly installed at the top of the lower mold 1, an upper mold 3 is arranged above the lower mold 1, a connecting hole corresponding to the slide rod 2 is arranged at the top of the upper mold 3, the design of the slide rod 2 and the connecting hole ensures the stability and accuracy of the upper mold 3 and the lower mold 1 when the mold is closed, a plurality of injection ports 4 are arranged at the middle position of the upper mold 3, and the plurality of injection ports 4 ensure the uniformity of injection.

[0027] Referring to the drawings Figure 1 , Figures 4-6 A mold groove 5 is arranged at the top of the lower mold 1, a containing groove 6 is arranged at the middle position of the bottom of the mold groove 5, the containing groove 6 is a stepped structure, the top size of the containing groove 6 is larger than the bottom size, an ejection plate 7 is arranged in the containing groove 6, an ejection mechanism 8 is arranged below the ejection plate 7, the ejection mechanism 8 comprises a bidirectional screw rod 801 rotatably arranged on the lower mold 1, a first motor 802 is arranged on the lower mold 1, and the output shaft of the first motor 802 is connected with the bidirectional screw rod 801, when in use, the first motor 802 is started, the output shaft of the first motor 802 drives the bidirectional screw rod 801 to rotate, a moving block 803 is threadedly connected to the two sides of the bidirectional screw rod 801, a guide rod 804 is fixedly arranged on the lower mold 1 and penetrates through the moving block 803, so that the two moving blocks 803 are limited, the two moving blocks 803 can move towards or away from each other during the rotation of the bidirectional screw rod 801, a lifting plate 805 is arranged above the bidirectional screw rod 801, a connecting block 806 is fixedly arranged at the bottom of the lifting plate 805, a supporting rod 807 is movably arranged between the moving block 803 and the connecting block 806 of the same side, a stand column 808 is fixedly arranged at the middle position of the top of the lifting plate 805 and connected with the ejection plate 7, when the two moving blocks 803 move towards each other, under the connection of the supporting rod 807 and the connecting block 806, the lifting plate 805 and the stand column 808 drive the ejection plate 7 to move upwards and eject the loudspeaker plastic shell formed in the mold groove 5, when the two moving blocks 803 move away from each other, the lifting plate 805 and the stand column 808 drive the ejection plate 7 to move downwards and move the ejection plate 7 to the initial position.

[0028] Referring to the drawings Figure 1 and Figure 2, No. 1 brackets 9 are fixedly installed on both sides of the lower mold 1, and an auxiliary demoulding mechanism 10 is set above the No. 1 bracket 9. The auxiliary demoulding mechanism 10 includes a frame 1001 fixedly installed on the top outside of the No. 1 bracket 9, and a transmission rod 1002 is rotatably installed on the frame 1001. A No. 2 motor 1003 is set on the frame 1001, and the output shaft of the No. 2 motor 1003 is connected to the transmission rod 1002. When in use, the No. 2 motor 1003 is turned on, and the output shaft of the No. 2 motor 1003 drives the transmission rod 1002 to rotate, and the transmission A cam 1004 is fixedly mounted on the movable rod 1002, and the cam 1004 rotates synchronously with the transmission rod 1002. A frame plate 1005 is fixedly mounted on the inner side of the top of the No. 1 bracket 9, and a moving rod 1006 is slidably mounted on the frame plate 1005. A collision block 1007 is fixedly mounted on the inner end of the moving rod 1006, and a stop block 1008 is fixedly mounted on the outer end of the moving rod 1006, wherein the collision block 1007 is a spherical structure, and the stop block 1008 is a truncated cone structure, and a spring 1009 is arranged between the frame plate 1005 and the stop block 1008.

[0029] During use, the operator turns on the No. 2 motor 1003, and the No. 2 motor 1003 drives the transmission rod 1002 and the cam 1004 to rotate. Under the connecting action of the spring 1009, the cam 1004 is always in contact with the block 1008. When the distal hub end of the cam 1004 contacts the block 1008, the moving rod 1006 drives the impact block 1007 to move toward the lower mold 1 and impacts the lower mold 1, providing additional demoulding force to achieve an auxiliary demoulding effect. When the proximal hub end of the cam 1004 contacts the block 1008, the moving rod 1006 drives the impact block 1007 to move away from the lower mold 1.

[0030] Refer to the attached Figures 1-3 A No. 2 bracket 11 is fixedly installed on the rear side of the lower mold 1, and an ejection mechanism 12 is arranged above the No. 2 bracket 11. The ejection mechanism 12 includes multiple cylinders 1201 arranged above the No. 2 bracket 11, and the ends of the piston rods of the multiple cylinders 1201 are connected to push plates 1202. When the ejection plate 7 ejects the formed plastic shell of the speaker, the operator turns on the multiple cylinders 1201, and the piston rods of the cylinders 1201 drive the push plates 1202 to move. The push plates 1202 contact the plastic shell of the speaker and push the plastic shell out.

[0031] The speaker plastic shell injection mold is injection molded by combining the upper mold 3 and the lower mold 1. After molding, the speaker plastic shell is ejected from the mold groove 5 by the ejection mechanism 8. At the same time, the auxiliary demoulding mechanism 10 assists in demoulding through the impact force generated by the rotation of the cam 1004. Finally, the cylinder 1201 piston rod of the ejection mechanism 12 pushes the push plate 1202 to completely push out the speaker plastic shell.

[0032] Finally: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the scope of protection of the present application.

Claims

1. A loudspeaker plastic shell injection mold, comprising a lower mold (1), the lower mold (1) is provided with a mold groove (5) at the top, characterized in that: The bottom of the mold groove (5) is provided with a containing groove (6) in the middle position, the containing groove (6) is provided with an ejection plate (7), the lower part of the ejection plate (7) is provided with an ejection mechanism (8), the left and right sides of the lower mold (1) are both fixedly installed with a first support (9), the upper part of the first support (9) is provided with an auxiliary demolding mechanism (10), the rear side of the lower mold (1) is fixedly installed with a second support (11), and the upper part of the second support (11) is provided with a pushing mechanism (12).

2. The loudspeaker plastic enclosure injection mold of claim 1, wherein: The top of the lower mold (1) is fixedly installed with a sliding rod (2) at four corners, the upper part of the lower mold (1) is provided with an upper mold (3), the upper mold (3) is provided with a connecting hole corresponding to the sliding rod (2) at four corners, and the upper mold (3) is provided with a plurality of injection ports (4) in the middle position.

3. The loudspeaker plastic enclosure injection mold of claim 1, wherein: The ejection mechanism (8) comprises a bidirectional screw rod (801) rotatably installed on the lower mold (1), a first motor (802) is arranged on the lower mold (1), and the output shaft of the first motor (802) is connected with the bidirectional screw rod (801), the two sides of the bidirectional screw rod (801) are both threadedly connected with a moving block (803), a guide rod (804) is fixedly installed on the lower mold (1), and the guide rod (804) penetrates through the moving block (803), a lifting plate (805) is arranged above the bidirectional screw rod (801), and the two sides of the bottom of the lifting plate (805) are both fixedly installed with a connecting block (806), a supporting rod (807) is movably installed between the moving block (803) and the connecting block (806) on the same side, a stand column (808) is fixedly installed at the middle position of the top of the lifting plate (805), and the stand column (808) is connected with the ejection plate (7).

4. The loudspeaker plastic enclosure injection mold of claim 1, wherein: The auxiliary demolding mechanism (10) comprises a rack (1001) fixedly installed on the top outer side of the first support (9), a transmission rod (1002) is rotatably installed on the rack (1001), a second motor (1003) is arranged on the rack (1001), and the output shaft of the second motor (1003) is connected with the transmission rod (1002), a cam (1004) is fixedly installed on the transmission rod (1002), a rack plate (1005) is fixedly installed on the top inner side of the first support (9), a moving rod (1006) is slidably installed on the rack plate (1005), a striking block (1007) is fixedly installed on the inner end of the moving rod (1006), a blocking block (1008) is fixedly installed on the outer end of the moving rod (1006), and a spring (1009) is arranged between the rack plate (1005) and the blocking block (1008).

5. The loudspeaker plastic enclosure injection mold of claim 4, wherein: The striking block (1007) is in a spherical structure, and the blocking block (1008) is in a circular truncated cone structure.

6. The loudspeaker plastic enclosure injection mold of claim 1, wherein: The pushing mechanism (12) comprises a plurality of air cylinders (1201) arranged above the second support (11), and the piston rod ends of the plurality of air cylinders (1201) are connected with a pushing plate (1202).

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