Earphone shell injection molding device

Abstract

The utility model belongs to the technical field of earphone shell injection molding, and particularly relates to an earphone shell injection molding device which comprises a base, a first vertical plate, a second vertical plate, a movable mold, a fixed mold, an air blowing head, a toothed bar, a gear, a rotating shaft and an injection unit. During injection molding, molten plastic is injected into a molding cavity in the mold through the injection unit, the blowing head automatically moves upwards through angle adjustment of the swing rod to avoid interference when the mold is closed, and the blowing head moves downwards and is communicated with the fan through the connecting hose to blow air to the earphone shell for rapid cooling when the mold is opened. A sliding groove in the top of the fixed mold is matched with a T-shaped fixing plate of the blowing head to guarantee the stability of the blowing head in the moving process, meanwhile, a toothed bar at the top of the movable mold is meshed with a gear, a swing rod is driven through rotation of a rotating shaft to achieve vertical movement of the blowing head, the whole device is compact in structure and high in movement synergy, and the cooling efficiency and the demolding stability are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to earphone shell injection moulding technical field, concretely relates to an earphone shell injection moulding device. BACKGROUND

[0002] Earphone shell as one of the main structural parts of earphone, usually is made by injection moulding process. Injection moulding process is through the molten state's plastic injection into mould forming cavity, after cooling, solidification forms a kind of processing method of product. This process is widely used in the manufacturing of plastic products, especially in the field of electronic products, because injection moulding process can accurately control structure shape and size, thus has important significance in the production of earphone shell.

[0003] At present, earphone shell injection mould on the market usually includes fixed mould and movable mould two parts, and the opening and closing of mould are realized by the movement of movable mould, and the injection of plastic melt is completed by injection unit. However, the existing injection moulding device has the following problems:

[0004] 1. Low cooling efficiency: after earphone shell is formed, it needs to be cooled for a period of time to complete demolding. If the cooling process time is longer, the production efficiency will be significantly reduced, which is difficult to meet the needs of batch production.

[0005] 2. Easy to damage in demolding process: earphone shell is usually thin in structure and precise in size. In the demolding process, if the cooling is insufficient or the force is uneven in the discharging process, the product is easy to deform or damage, which affects the product quality. At the same time, due to the small size of earphone shell, mechanical hand is usually used to cooperate with suction cup in discharging, and the product has high temperature after forming, which will affect the suction cup and reduce the service life of the suction cup.

[0006] 3. Limited air cooling distance: because the mould cavity of the mould is usually placed in the center position, even if the discharged product is placed in the center position after forming, if the air cooling equipment is simply added outside the mould, the air cooling effect is limited due to the long distance. UTILITY MODEL CONTENTS

[0007] In view of the problems existing in the prior art, the utility model aims at providing an earphone shell injection moulding device, which can realize, improve the cooling efficiency, reduce the product damage rate, and avoid the interference of mould opening and closing.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0009] The utility model provides an earphone shell injection molding device, including base and blow head, the upper surface vertical of base is provided with first stand and second stand, first stand and second stand parallelly arranged, both sides between first stand and second stand are provided with track bar, still be provided with movable mould between first stand and second stand, movable mould sliding installation on a plurality of track bars, the side close to first stand of second stand is fixed with fixed mould, fixed mould corresponds with movable mould, the side close to movable mould of fixed mould evenly is provided with forming groove, the surface of the side close to movable mould of fixed mould is symmetrically vertically provided with the slide groove, the blow head is placed on the side close to movable mould of fixed mould top, the back side of blow head is provided with fixed plate, the fixed plate section is T type, the fixed plate slides in the slide groove of fixed mould surface, a plurality of connecting hoses are evenly installed to the blow head top, the one end of connecting hose is connected on the fan away from blow head, the both ends of blow head are provided with fixed peg.

[0010] Further, the both sides of the top of the fixed mould are symmetrically provided with mounting plates, a rotating shaft is rotatably installed between the two mounting plates, and an axle sleeve is fixedly installed on the surface of the rotating shaft.

[0011] Further, the side close to the movable mould of the axle sleeve is provided with an oscillating rod, an orbit slot is formed in the side of the oscillating rod away from the rotating shaft, and the fixed peg is arranged in the orbit slot.

[0012] Further, the both ends of the surface of the rotating shaft are symmetrically provided with gears, and the two gears are arranged outside the two axle sleeves respectively.

[0013] Further, the side close to the fixed mould of the top of the movable mould is fixedly provided with a toothed rod, the toothed rod extends in the direction of the fixed mould in suspension, the toothed rod is engaged with the gears, and the toothed rod is arranged above the gears.

[0014] Further, the side of the upper surface of the base is fixedly provided with an injection unit, and the output end of the injection unit is communicated with the forming cavity in the fixed mould.

[0015] Further, the outer side of the first stand is fixedly provided with a push hydraulic cylinder, and the output end of the push hydraulic cylinder is fixed at the back of the movable mould.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] Through the combination of the fixed mold and the movable mold, the movable mold is driven to slide along the rail rod by the pushing hydraulic cylinder, the mold is stably opened and closed, the mold is prevented from being damaged or jammed due to unstable movement track; meanwhile, the gear rod arranged at the top of the movable mold is engaged with the gear, the rotation of the rotating shaft drives the angle change of the swing rod, the up-down movement of the blowing head is realized; the blowing head is automatically moved up to avoid interference when the mold is closed, and is moved down to reduce the distance when the mold is opened, the rapid cooling is realized by blowing the earphone shell forming part, the cooling efficiency is greatly improved, the cooling time is shortened, and the production efficiency is improved.

[0018] The symmetrical sliding groove and the mounting plate structure are designed at the top of the fixed mold, the T-shaped cross-section sliding connection of the blowing head fixing plate is matched, the blowing head always keeps stable during the movement, the inclination or position deviation of the blowing head caused by the angle change of the swing rod is avoided; the structure not only enhances the stability of the blowing process, but also improves the cooling effect by reducing the distance between the air outlet and the earphone shell, and effectively reduces the product deformation and quality problems caused by uneven cooling.

[0019] In addition, through the precise connection of the injection unit and the forming cavity in the mold, the molten plastic can be stably injected into the forming cavity to realize the precise forming of the earphone shell; after the mold is cooled and formed, the ejection is pushed by the air cylinder, and the stable taking-out of the earphone shell is realized by cooperating with the mechanical hand and the suction cup, so that the damage of the earphone shell caused by uneven demolding force in the traditional device is avoided; the overall structure design is compact and the movement coordination is strong, which is helpful to improve the automation degree and production efficiency of the injection molding device. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is an installation three-dimensional structure schematic view of the utility model;

[0021] Figure 2 It is a fixed mold and movable mold installation structure schematic view of the utility model;

[0022] Figure 3 It is a fixed mold and movable mold installation structure schematic view of the utility model;

[0023] Figure 4 It is a front view structure schematic view of the blowing head of the utility model;

[0024] Figure 5 It is a rear view structure schematic view of the blowing head of the utility model;

[0025] Figure 6 It is a Figure 3 A zone enlarged structure schematic view of the utility model.

[0026] In the drawings, the component list represented by each sign is as follows:

[0027] 1, base; 2, injection unit; 3, first vertical plate; 4, second vertical plate; 5, track bar; 6, fixed mold; 61, mounting plate; 7, movable mold; 71, rack; 8, push hydraulic cylinder; 9, rotating shaft; 91, gear; 10, shaft sleeve; 11, swing rod; 12, track groove; 13, blowing head; 131, fixing bolt; 14, fixing plate; 15, connecting hose. DETAILED DESCRIPTION

[0028] In order to make the purpose and advantages of the utility model more clear and apparent, the utility model is specifically described below in combination with examples. It should be understood that the following text is only used to describe one or several specific embodiments of the utility model, and does not strictly limit the specific protection scope requested by the utility model.

[0029] Reference Figures 1-5 As shown in the figure, an earphone shell injection molding device, including base 1 and blowing head 13, the upper surface of base 1 is vertically provided with first vertical plate 3 and second vertical plate 4, first vertical plate 3 and second vertical plate 4 are arranged in parallel, both sides between first vertical plate 3 and second vertical plate 4 are provided with track bar 5, both ends of track bar 5 are fixedly connected to the inner side surface of first vertical plate 3 and second vertical plate 4 respectively, the surface of track bar 5 is smooth to reduce the friction when movable mold 7 slides; first vertical plate 3 and second vertical plate 4 are also provided with movable mold 7, movable mold 7 is slidingly installed on a plurality of track bars 5, the bottom of movable mold 7 is provided with a sliding block for sliding cooperation with track bar 5, to ensure the stable linear sliding of movable mold 7 along track bar 5; second vertical plate 4 is fixed with fixed mold 6 near one side of first vertical plate 3, fixed mold 6 corresponds to movable mold 7, a plurality of forming grooves are uniformly formed on the side of fixed mold 6 close to movable mold 7, the specific shape of earphone shell is formed in the forming grooves; a sliding groove is symmetrically and vertically provided on the surface of the side of fixed mold 6 close to movable mold 7, the sliding groove provides sliding guide for fixing plate 14, to ensure that blowing head 13 always remains stable during the up and down movement; blowing head 13 is placed above the side of fixed mold 6 close to movable mold 7, fixing plate 14 is symmetrically arranged on the rear side of blowing head 13, the cross section of fixing plate 14 is T-shaped, the horizontal part of fixing plate 14 is embedded in the inside of the sliding groove, the vertical part is connected to blowing head 13, and fixing plate 14 slides in the sliding groove on the surface of fixed mold 6; a plurality of connecting hoses 15 are uniformly installed on the top of blowing head 13, one end of connecting hose 15 away from blowing head 13 is connected to the fan through a clamping structure, and the inner wall of connecting hose 15 is made of high-temperature-resistant material to prevent damage to the hose caused by high-temperature air during blowing; fixing bolts 131 are symmetrically arranged at both ends of blowing head 13, the fixing bolts 131 cooperate with track groove 12 to control the vertical movement of blowing head 13, and this structure can also be used to extract flue gas when the mold is removed.

[0030] Reference Figure 3 And Figure 6As shown, the top of the fixed mold 6 is symmetrically provided with mounting plates 61 on both sides, and a rotating shaft 9 is mounted between the two mounting plates 61 through a rotating shaft seat. A shaft sleeve 10 is fixedly mounted on the surface of the rotating shaft 9. The rotating shaft 9 and the shaft sleeve 10 can be fixed by screwing to ensure synchronous rotation of the rotating shaft 9 and the shaft sleeve 10, and facilitate installation and debugging. The initial angle of the swing rod 11 can be adjusted by loosening the screw, thereby improving flexibility.

[0031] Reference Figures 4-6 As shown, the shaft sleeve 10 is fixedly mounted with a swing rod 11 on the side close to the movable mold 7 through a bolt. The surface of the swing rod 11 away from the rotating shaft 9 is provided with a track groove 12. The inner wall of the track groove 12 is smooth to reduce the frictional resistance of the fixing bolt 131 during sliding. The fixing bolt 131 is placed inside the track groove 12 and the sliding path of the fixing bolt 131 is constrained by the track groove 12, thereby ensuring the stable and accurate vertical movement of the blowing head 13.

[0032] Reference Figures 4-6 As shown, the surface of the rotating shaft 9 is symmetrically provided with gears 91 at both ends. The gears 91 are respectively placed outside the two shaft sleeves 10. This distribution can prevent the rotation of the gear rod 71 from affecting the rotation of the swing rod 11. The tooth surface of the gear 91 is meshed with the gear rod 71. The rotation of the gear 91 drives the gear rod 71 to move, thereby achieving the opening and closing control of the movable mold 7.

[0033] Reference Figure 1 And Figure 2 As shown, the movable mold 7 is fixedly provided with a gear rod 71 on the top close to the fixed mold 6. The gear rod 71 extends in the direction of the fixed mold 6 in the air. The gear rod 71 is meshed with the gear 91. A limiting groove is arranged below the suspended part of the gear rod 71 to avoid the gear rod 71 from deviating when the movable mold 7 slides. The gear rod 71 is placed above the gear 91. The gear rod 71 is precisely machined to ensure smooth operation during meshing. The surface of the gear rod 71 is not all teeth. Only the end of the mold opening and closing needs to form a driving gear 91 to rotate.

[0034] Reference Figure 1 As shown, the upper surface of the base 1 is fixedly provided with an injection unit 2. The output end of the injection unit 2 is communicated with the molding cavity inside the fixed mold 6. The injection unit 2 includes a heating device and an injection device. The heating device is used to heat the plastic particles to a molten state, and the molten plastic is injected into the molding cavity through the injection device.

[0035] Reference Figure 1 As shown, the first vertical plate 3 is fixedly provided with a push hydraulic cylinder 8 on the outside. The output end of the push hydraulic cylinder 8 is fixed to the back of the movable mold 7. The push hydraulic cylinder 8 is used to drive the movable mold 7 to slide along the track rod 5, thereby achieving the opening and closing action of the movable mold 7 and the fixed mold 6. The output end of the hydraulic cylinder 8 is fixedly connected with the back of the movable mold 7 through an adjustable connecting piece. The output stroke of the hydraulic cylinder 8 can be adjusted as needed to adapt to different mold opening and closing requirements.

[0036] The working principle of the utility model is: first through the hydraulic cylinder 8 can push the dynamic mode 7 to move, then control the opening and closing of dynamic mode 7 and fixed mode 6, when injection molding, dynamic mode 7 and fixed mode 6 are combined, then through the injection unit 2 to the inside injection melt into the inside forming cavity, after cooling and shaping, dynamic mode 7 and fixed mode 6 are separated, then through the cylinder to discharge, to realize the whole injection molding process, in this process, the movement of dynamic mode 7 can drive the rack 71 synchronous movement, then through the mutual engagement of rack 71 and gear 91 drive the rotation of the shaft 9, the rotation of the shaft 9 can synchronous drive swing rod 11 to change the angle, because the fixed bolt 131 is placed in the track slot 12, when swing rod 11 changes the angle, can drive the whole vertical movement of the air blowing head 13, because the rack 71 is placed above the shaft 9, therefore, when the mold is closed, the end of swing rod 11 is upturned, can drive the air blowing head 13 to move upwards, so that its height exceeds fixed mode 6, prevent the influence on the mold, on the contrary, when the mold is opened, the air blowing head 13 moves downwards, to reduce the distance between the air outlet and the earphone shell after shaping, through the downward blowing to realize the cooling, quickly reduce the temperature of the earphone shell after shaping, to facilitate the unloading through the mechanical hand and suction cup, will not cause damage to the suction cup because of the height, because the fixed plate 14 is T-shaped, and slides in the vertical sliding groove on the top of fixed mode 6, can guarantee the stability of the movement of air blowing head 13 in the process of the rotation of the shaft 9.

[0037] The above only is the preferred implementation of the utility model, should point out, for the ordinary skill in the art, on the premise of not departing from the principle of the utility model, can make several improvements and refinements, these improvements and refinements also should be regarded as the protection scope of the utility model. The structure, device and operation method not specifically described and explained in the utility model, if no special description and limitation, are implemented according to the conventional means in the field.

Claims

1. An earphone shell injection molding device, comprising a base (1) and a blowing head (13), characterized in that: The upper surface of the base (1) is vertically provided with a first vertical plate (3) and a second vertical plate (4), the first vertical plate (3) and the second vertical plate (4) are arranged in parallel, track bars (5) are arranged on both sides between the first vertical plate (3) and the second vertical plate (4), a movable mold (7) is further arranged between the first vertical plate (3) and the second vertical plate (4), the movable mold (7) is slidingly installed on a plurality of track bars (5), a fixed mold (6) is fixed on the side of the second vertical plate (4) close to the first vertical plate (3), the fixed mold (6) corresponds to the movable mold (7), a plurality of forming grooves are uniformly formed on the side of the fixed mold (6) close to the movable mold (7), a chute is symmetrically and vertically formed on the surface of the side of the fixed mold (6) close to the movable mold (7), a blowing head (13) is arranged above the side of the fixed mold (6) close to the movable mold (7), fixed plates (14) are symmetrically arranged on the rear side of the blowing head (13), the fixed plates (14) are T-shaped in cross section, the fixed plates (14) slide in the chute on the surface of the fixed mold (6), a plurality of connecting hoses (15) are uniformly arranged on the top of the blowing head (13), one end of the connecting hoses (15) away from the blowing head (13) is connected to a fan, and fixed bolts (131) are symmetrically arranged at both ends of the blowing head (13).

2. The earphone shell injection molding device according to claim 1, wherein: The top of the fixed mold (6) is symmetrically provided with mounting plates (61) on both sides, and a rotating shaft (9) is rotatably arranged between the two mounting plates (61).

3. The earphone shell injection molding device according to claim 2, wherein: The side of the shaft sleeve (10) close to the movable mold (7) is provided with an oscillating rod (11), the side of the oscillating rod (11) away from the rotating shaft (9) is provided with a track groove (12), and the fixed bolt (131) is arranged in the track groove (12).

4. The earphone shell injection molding device according to claim 3, wherein: The surface of the rotating shaft (9) is symmetrically provided with gears (91) at both ends, and the two gears (91) are arranged outside the two shaft sleeves (10) respectively.

5. The earphone shell injection molding device according to claim 4, wherein: The top of the movable mold (7) is fixed with a toothed rod (71) on the side close to the fixed mold (6), the toothed rod (71) extends in the direction of the fixed mold (6) in suspension, the toothed rod (71) is engaged with the gears (91), and the toothed rod (71) is arranged above the gears (91).

6. The earphone shell injection molding device according to claim 1, wherein: The upper surface of the base (1) is fixed with an injection unit (2) on one side, and the output end of the injection unit (2) is communicated with a forming cavity in the fixed mold (6).

7. The earphone shell injection molding device according to claim 1, wherein: The first vertical plate (3) is fixed with a push hydraulic cylinder (8) on the outside, and the output end of the push hydraulic cylinder (8) is fixed on the back of the movable mold (7).

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