Seat fitting injection molding device

Abstract

The application discloses a seat accessory injection molding device, which comprises a heating cylinder and a heat insulation cylinder nested on the heating cylinder, a plurality of support frames are fixed to the bottom of the heating cylinder, a servo motor is fixed to the top of the support frame, a driving cylinder is fixed to the top of the servo motor through a support rod, a feeding cylinder is fixed to the top of the heating cylinder, a fixed bearing is nested at one end of the heating cylinder, a piston pipe is fixedly arranged in the middle of the fixed bearing, a piston block is movably sleeved on the inner wall of the piston pipe, a plurality of positive screws are fixed to the surface of the piston pipe, a plurality of reverse screws are fixed to the surface of the piston pipe, a heating pipe is fixed to the inner wall of the heating cylinder, and a discharging end is integrally formed at the other end of the heating cylinder. The heating pipe is spirally arranged on the inner wall of the heating cylinder, so that the length of the heating pipe in the heating cylinder is greatly increased, the contact area of the plastic and the heating pipe is increased, the plastic is rapidly heated, the plastic is rapidly melted, and the seat accessory injection molding device has the advantages of high plastic melting efficiency.

Description

Technical Field

[0001] This invention relates to the field of furniture accessories technology, and more particularly to an injection molding device for chair accessories. Background Technology

[0002] The seat has many components, some of which need to be produced by injection molding. The injection molding machine heats and melts plastic granules, and then injects the liquid plastic into the mold, where the liquid plastic takes the desired shape.

[0003] Existing injection molding devices typically drive liquid plastic in a spiral direction. This prevents the liquid plastic from counteracting each other, resulting in uneven heating and insufficient contact area between the heating element and the plastic, which prevents the plastic from melting quickly. Therefore, there is a need to provide injection molding devices for seat accessories. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the prior art where liquid plastic is generally driven in a spiral direction, which prevents the liquid plastic from counteracting each other, resulting in uneven heating of the liquid plastic, and insufficient contact area between the heating tube and the plastic, causing the plastic to not melt quickly. Therefore, this invention proposes an injection molding device for seat accessories.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a seat accessory injection molding device, comprising a heating cylinder and a heat insulation cylinder nested thereon, multiple support frames fixed at the bottom of the heating cylinder, a servo motor fixed at the top of the support frames, a drive cylinder fixed at the top of the servo motor via a support rod, a feed cylinder fixed at the top of the heating cylinder, a fixed bearing nested at one end of the heating cylinder, a piston tube fixed through the middle of the fixed bearing, a piston block movably sleeved on the inner wall of the piston tube, multiple positive screws fixed on the surface of the piston tube, multiple negative screws fixed on the surface of the piston tube, a heating tube fixed on the inner wall of the heating cylinder, an integrally formed discharge end at the other end of the heating cylinder, a driven helical gear nested in the movement of the piston tube, and a driving helical gear fixed on the power output end of the servo motor.

[0006] More preferably, the heating tube is spirally wrapped around the inner wall of the heating cylinder, the positive screw and the anti-screw are spirally wound on the surface of the piston tube, and the positive screw and the anti-screw are spirally wound inside the heating tube.

[0007] More preferably, the positive and negative screws have opposite helical directions, are spaced apart, and the driven helical gear and the driving helical gear are kept meshed.

[0008] More preferably, the end of the drive cylinder is fixed to the piston block, the thermal conductivity of the heat insulation cylinder is less than 0.1, and the end of the feed cylinder penetrates through the top of the feed cylinder.

[0009] More preferably, the top of the heating cylinder has a notch, and the notch of the heating cylinder is aligned with the end of the feed cylinder.

[0010] In a further preferred embodiment, the heating tube is fixed with multiple horizontal rods, a central rod is nested and fixed in the middle of the horizontal rods, limit rings are nested and fixed at both ends of the central rod, and a rubber ring is movably sleeved in the middle of the central rod.

[0011] More preferably, the inner side of the rubber ring is integrally formed with multiple protrusions, and the outer opening of the rubber ring is provided with multiple shrinkage grooves. The multiple protrusions surround the inner side of the rubber ring, and the multiple shrinkage grooves surround the outer side of the rubber ring.

[0012] In a further preferred embodiment, the inner diameter of the rubber ring is larger than the diameter of the center rod, and the thickness of the rubber ring is greater than the distance between the reverse screw and the center rod, so that the rubber ring abuts against the surfaces of the positive screw and the reverse screw.

[0013] More preferably, the axial direction of the center rod is perpendicular to the axial direction of the positive screw, and the axial direction of the rubber ring is parallel to the axial direction of the center rod.

[0014] The beneficial effects of this invention are:

[0015] The heating element is spiraled on the inner wall of the heating cylinder, which can greatly increase the length of the heating element inside the heating cylinder, increase the contact area between the plastic and the heating element, and make the plastic heat up and melt quickly, which has the advantage of high plastic melting efficiency.

[0016] The positive and negative screws have opposite spiral directions. The positive and negative screws roll the plastic towards the middle, causing the plastic to collide between the positive and negative screws. Unmelted plastic is pushed to the inner wall of the heating cylinder, causing the plastic to heat up and melt quickly. The plastic collide with each other and can be heated quickly.

[0017] During the rotation of the positive and negative screws, due to their shapes, the positive and negative screws rub against the rubber ring, causing the rubber ring to rotate rapidly. As the rubber ring rotates, it drives the plastic, causing the plastic to flow rapidly in the gap of the heating tube. The positive and negative screws roll the material and make it collide, and the material moves quickly into the gap of the heating tube after the collision.

[0018] During rotation, the rubber ring presses against the surface of the positive screw. The shape of the positive screw causes it to squeeze the rubber ring intermittently during rotation. Plastic enters the gap between the rubber ring and the central rod. The positive screw squeezes the rubber ring intermittently, causing the material inside the rubber ring to be squeezed out. The elasticity of the rubber ring itself will cause it to return to its original position. The rubber ring can continuously draw in the material. The material is continuously drawn in and squeezed out, so that the material is heated evenly.

[0019] The protrusions on the inner side of the rubber ring cause it to vibrate when squeezed. This vibration is transmitted to the raw material, ensuring that the material is mixed evenly in the gaps between the heating tubes. The material can then be heated evenly and quickly in the gaps between the heating tubes. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a cross-sectional schematic diagram of the heating cylinder of the present invention;

[0022] Figure 3 This is a disassembly diagram of the heating tube and piston tube of the present invention;

[0023] Figure 4 This is a schematic diagram of the piston tube structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the heating tube structure of the present invention;

[0025] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle;

[0026] Figure 7 This is a schematic diagram showing the disassembly of the rubber ring of the present invention;

[0027] Figure 8 This is a schematic cross-sectional view of the rubber ring of the present invention.

[0028] In the diagram: 1. Heating cylinder; 2. Insulation cylinder; 3. Support frame; 4. Feed cylinder; 5. Fixed bearing; 6. Piston tube; 7. Piston block; 8. Positive screw; 9. Negative screw; 10. Discharge end; 11. Heating tube; 12. Drive cylinder; 13. Servo motor; 14. Driven helical gear; 15. Driven helical gear; 16. Transverse rod; 17. Center rod; 18. Limiting ring; 19. Rubber ring; 20. Shrinkage groove; 21. Protrusion. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] Reference Figures 1 to 8The seat component injection molding device includes a heating cylinder 1 and a heat insulation cylinder 2 nested thereon. Multiple support frames 3 are fixed to the bottom of the heating cylinder 1, and a servo motor 13 is fixed to the top of the support frame 3. A drive cylinder 12 is fixed to the top of the servo motor 13 via a support rod. A feed cylinder 4 is fixed to the top of the heating cylinder 1. A fixed bearing 5 is nested at one end of the heating cylinder 1. A piston tube 6 is fixed through the middle of the fixed bearing 5. A piston block 7 is movably sleeved on the inner wall of the piston tube 6. Multiple positive screws 8 and multiple negative screws 9 are fixed to the surface of the piston tube 6. A heating tube 11 is fixed to the inner wall of the heating cylinder 1. An outlet end 10 is integrally formed at the other end of the heating cylinder 1. A driven helical gear 14 is nested in the moving piston tube 6. An active helical gear 15 is fixed to the power output end of the servo motor 13.

[0031] Preferably, the heating tube 11 is spirally wrapped around the inner wall of the heating cylinder 1, the positive screw 8 and the negative screw 9 are spirally on the surface of the piston tube 6, the positive screw 8 and the negative screw 9 are spirally inside the heating tube 11, the positive screw 8 and the negative screw 9 are spiraling in opposite directions, the positive screw 8 and the negative screw 9 are spaced apart, and the driven helical gear 14 and the driving helical gear 15 are kept meshed;

[0032] In practice, the positive screw 8 and the negative screw 9 have opposite spiral directions. The positive screw 8 and the negative screw 9 roll the plastic towards the middle, so that the plastic is impacted between the positive screw 8 and the negative screw 9. The unmelted plastic is pushed to the inner wall of the heating cylinder 1, so that the plastic is heated and melted quickly.

[0033] Preferably, the top of the heating cylinder 1 is provided with a notch, and the notch of the heating cylinder 1 is connected to the end of the feeding cylinder 4. The end of the driving cylinder 12 is fixed to the piston block 7. The thermal conductivity of the heat insulation cylinder 2 is less than 0.1. The end of the feeding cylinder 4 passes through the top of the feeding cylinder 4. The driving cylinder 12 drives the piston block 7 to move inside the piston tube 6. The piston block 7 pushes out the plastic inside the piston tube 6, so that the plastic is squeezed into the mold through the discharge end 10.

[0034] Preferably, a plurality of horizontal rods 16 are fixed on the heating tube 11, a central rod 17 is nested and fixed in the middle of the horizontal rods 16, a limit ring 18 is nested and fixed at both ends of the central rod 17, and a rubber ring 19 is movably sleeved in the middle of the central rod 17.

[0035] In practice, during the rotation of the positive screw 8 and the negative screw 9, due to their shapes, the positive screw 8 and the negative screw 9 rub against the rubber ring 19, causing the rubber ring 19 to rotate rapidly. During the rotation of the rubber ring 19, the plastic is driven to flow rapidly in the gap of the heating tube, thereby making the plastic heat up quickly and evenly.

[0036] Preferably, the inner side of the rubber ring 19 is integrally formed with a plurality of protrusions 21, and the outer opening of the rubber ring 19 is provided with a plurality of shrinkage grooves 20. The plurality of protrusions 21 surround the inner side of the rubber ring 19, and the plurality of shrinkage grooves 20 surround the outer side of the rubber ring 19.

[0037] In practice, the protrusion 21 on the inner side of the rubber ring 19 causes the rubber ring 19 to vibrate when it is squeezed. The vibration is transmitted to the raw material, so that the raw material is mixed evenly in the gap of the heating tube. The raw material can be heated evenly and quickly in the gap of the heating tube. The shrinkage groove 20 of the rubber ring 19 allows it to deform when squeezed, so that the rubber ring 19 rotates during the squeezing process by the reverse screw 9.

[0038] Preferably, the inner diameter of the rubber ring 19 is larger than the diameter of the center rod 17, and the thickness of the rubber ring 19 is larger than the distance between the reverse screw 9 and the center rod 17, so that the rubber ring 19 abuts against the surfaces of the positive screw 8 and the reverse screw 9, the axial direction of the center rod 17 is perpendicular to the axial direction of the positive screw 8, and the axial direction of the rubber ring 19 is parallel to the axial direction of the center rod 17. Multiple rubber rings 19 are arranged around the piston tube 6 along the spiral of the heating tube 11.

[0039] In practice, the rubber ring 19 presses against the surface of the positive screw 8 during rotation. The shape of the positive screw 8 causes it to squeeze the rubber ring 19 intermittently during rotation. Plastic enters the gap between the rubber ring 19 and the central rod 17. The positive screw 8 squeezes the rubber ring 19 intermittently, causing the material inside the rubber ring 19 to be squeezed out. The elasticity of the rubber ring 19 itself will cause it to return to its original position. The rubber ring 19 can continuously draw in the material. The material is continuously drawn in and squeezed out, so that the material is heated evenly.

[0040] In this invention, during use, firstly, the servo motor 13 drives the active helical gear 15 to rotate, which in turn drives the driven helical gear 14 to rotate, causing the piston tube 6, the positive screw 8, and the negative screw 9 of the driven helical gear 14 to rotate synchronously. Then, plastic granules are poured into the feed cylinder 4, and subsequently, the plastic enters the heating cylinder 1. The heating tube 11 heats the plastic to melt it. The positive screw 8 and the negative screw 9 roll the plastic in opposite directions, causing the plastic to collide with each other and push the incompletely melted plastic to the inner wall of the heating cylinder 1. The incompletely melted plastic is then melted by the heating tube 11. The drive cylinder 12 drives the piston block 7 to move in the piston tube 6, and the piston block 7 extrudes the melted plastic inside the piston tube 6. The plastic is then discharged through the discharge end 10 of the heating cylinder 1 and enters the mold.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A seat accessory injection molding device, comprising a heating cylinder (1) and a heat insulation cylinder (2) nested thereon, wherein a plurality of support frames (3) are fixed to the bottom of the heating cylinder (1), a servo motor (13) is fixed to the top of the support frame (3), a drive cylinder (12) is fixed to the top of the servo motor (13) by a support rod, and a feed cylinder (4) is fixed to the top of the heating cylinder (1), characterized in that: One end of the heating cylinder (1) is nested with a fixed bearing (5), a piston tube (6) is fixed through the middle of the fixed bearing (5), a piston block (7) is movably sleeved on the inner wall of the piston tube (6), a plurality of positive screws (8) are fixed on the surface of the piston tube (6), a plurality of negative screws (9) are fixed on the surface of the piston tube (6), a heating tube (11) is fixed on the inner wall of the heating cylinder (1), a discharge end (10) is integrally formed at the other end of the heating cylinder (1), a driven helical gear (14) is nested on the moving piston tube (6), and an active helical gear (15) is fixed on the power output end of the servo motor (13). Multiple horizontal rods (16) are fixed on the heating tube (11). A central rod (17) is nested in the middle of the horizontal rods (16). Limiting rings (18) are nested in both ends of the central rod (17). A rubber ring (19) is movably sleeved in the middle of the central rod (17). The inner side of the rubber ring (19) is integrally formed with multiple protrusions (21), and the outer side of the rubber ring (19) is provided with multiple shrinkage grooves (20). The multiple protrusions (21) surround the inner side of the rubber ring (19), and the multiple shrinkage grooves (20) surround the outer side of the rubber ring (19). The inner diameter of the rubber ring (19) is greater than the diameter of the center rod (17), and the thickness of the rubber ring (19) is greater than the distance between the reverse screw (9) and the center rod (17), so that the rubber ring (19) abuts against the surfaces of the positive screw (8) and the reverse screw (9). The axial direction of the central rod (17) is perpendicular to the axial direction of the positive screw (8), and the axial direction of the rubber ring (19) is parallel to the axial direction of the central rod (17).

2. The injection molding device for seat accessories according to claim 1, characterized in that, The heating tube (11) is spirally wrapped around the inner wall of the heating cylinder (1), the positive screw (8) and the negative screw (9) are spirally wrapped on the surface of the piston tube (6), and the positive screw (8) and the negative screw (9) are spirally wrapped inside the heating tube (11).

3. The injection molding device for seat accessories according to claim 2, characterized in that, The positive screw (8) and the negative screw (9) have opposite helical directions and are spaced apart. The driven helical gear (14) and the driving helical gear (15) are kept in mesh.

4. The injection molding device for seat accessories according to claim 1, characterized in that, The end of the drive cylinder (12) is fixed to the piston block (7), the thermal conductivity of the heat insulation cylinder (2) is less than 0.1, and the end of the feed cylinder (4) penetrates the top of the heat insulation cylinder (2).

5. The injection molding device for seat accessories according to claim 1, characterized in that, The top of the heating cylinder (1) has a notch, and the notch of the heating cylinder (1) is connected to the end of the feed cylinder (4).

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