CN104890239A - Plastic mouldless forming device - Google Patents
Plastic mouldless forming device Download PDFInfo
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- CN104890239A CN104890239A CN201510264837.1A CN201510264837A CN104890239A CN 104890239 A CN104890239 A CN 104890239A CN 201510264837 A CN201510264837 A CN 201510264837A CN 104890239 A CN104890239 A CN 104890239A
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- machine barrel
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Abstract
The invention discloses a plastic mouldless forming device which comprises a plasticizing part, a dripping part and a forming part, wherein a switching mechanism which the dripping part adopts is a nozzle needle, and the nozzle needle comprises a sealing ring, an elastic joint and a needle core. An actuator which has a piezoelectric property acts on the nozzle needle, so that the opening and closing of a discharging port is controlled by the needle core, an opening or closing speed of less than 0.01 s can be achieved, and requirements of three-dimensional printing for separating dimensions of high-viscosity materials are met. Problems such as leakage, abrasion and the like are avoided at the same time, and the high-frequency and microscale switching control of high-viscosity, high-pressure and high-temperature fluids is realized. A manipulator of the forming part comprises a plurality of moving joints which are driven by a control system, so that the tail end of the manipulator can be located at any position and direction. Besides, special requirements such as light sensitivity and the like for forming materials do not exist, and objects in any three-dimensional shape can be formed. The mould opening link is omitted, the production time can be saved, the production cost can be reduced, and the plastic mouldless forming device is suitable for producing one-piece or small-batch plastic products which can be used directly.
Description
Technical field
The invention belongs to plastics molding process and equipment technology field, relate to a kind of device of plastics mould-free forming.
Background technology
The production of plastic products is normally with the realization in large quantity of the mode such as injection moulding or extrusion molding, although these modes of production accurately in enormous quantities manufacture there is complex geometric shapes plastic products on have superiority, but these modes of production all need to prepare metal die in advance, and the manufacture of mould needs to expend the long period, and cost intensive.
Along with the made rapid progress of technology and increasingly sharpening of competition, the product life cycle is shorter and shorter, develops new product and has become the key winning competitive advantage.Even new product will be produced in enormous quantities, in research and advanced development, its properity, specification also will be used for various modifications, and need single-piece or small lot batch manufacture mode.Single-piece or small lot batch manufacture occupy firm status also in the trend expanded with the novelty of its product in the market with unique.
Summary of the invention
For realizing plastic products single-piece or small lot batch manufacture, technical scheme of the present invention is design plastics mould-free forming device, to produce the plastic products with space three-dimensional shape.
The object of the invention is to be achieved through the following technical solutions: a kind of plastics mould-free forming device, comprise Plasticized component, point drip parts and a profiled part; Described point drips parts and comprises annular slab, unloading block, nozzle needle, accumulator, pressing plate, protective ring, case, actuator, adjuster; Described case, protective ring, accumulator are installed from top to bottom successively, and pressing plate is arranged in protective ring and encloses, and described pressing plate has central through hole; Described adjuster is arranged on case top; Accumulator has lateral aperture and upright opening, and upright opening upper end communicates with the central through hole of pressing plate, and side communicates with lateral aperture; Nozzle needle comprises sealing ring, elastic joint, nook closing member, and sealing ring is fixed between pressing plate and accumulator; Described elastic joint is positioned at the bottom of sealing ring, and both form bowl structure, and from center outward, material is thinning gradually for described elastic joint; Nook closing member is coupling in elastic joint lower surface center; Actuator is arranged in case, and adjuster is withstood in upper end, and lower end extend in the central through hole of pressing plate, withstands the actuating contact face of elastic joint; Unloading block is fixed on the lower end of upright opening by annular slab, and unloading block has nozzle bore; Described nozzle bore is positioned at immediately below nook closing member.
Further, described Plasticized component comprises screw head, screw rod, lower cover screw, lower cover, machine barrel platform, charging aperture, machine barrel seat, upper press cover, upper press cover screw, machine barrel, check ring, injection nozzle screw, injection nozzle; Described machine barrel seat is fixedly installed in machine barrel platform, machine barrel is fixed in machine barrel seat by lower cover and upper press cover, lower cover and upper press cover are semicircular annulus separately, become a complete circle when both are combined, lower cover and upper press cover are fixedly mounted on machine barrel seat respectively by upper press cover screw, lower cover screw; Machine barrel seat there is charging aperture; Described machine barrel has upright opening, and described upright opening is connected with the charging aperture above machine barrel seat; Machine barrel has central through hole, and screw head and screw rod are arranged in the central through hole of machine barrel, and the screw channel of screw rod and the inner hole wall of machine barrel form flow channel space.Screw head is fixedly mounted on the left end of screw rod, and check ring is enclosed within screw head slidably.There is the injection nozzle of endoporus to be fixedly mounted on the left end of machine barrel by injection nozzle screw, cover machine barrel endoporus from left end.
Further, described profiled part comprises pallet, manipulator, manipulator base; Manipulator is arranged on manipulator base, and manipulator comprises multiple movable joint; Pallet is arranged on the end of manipulator.
The invention has the beneficial effects as follows: the present invention is equipped with the synchro-shutter of nozzle needle as switching mechanism by one, ejects fluid mechanics and splits.Temperatures as high in accumulator 450 DEG C, more than pressure 100MPa, under nozzle bore is less than 0.1mm condition, realizes opening and closing speed and be less than 0.01s, meets the requirement of 3D printing to high viscosity material cut size.
In addition, the present invention does not have the particular/special requirements such as light sensitivity to moulding material, uses common plastic material, does not need the mould needed for usual injection-moulding plastic, can according to the object of the cad model Data Profile Arbitrary 3 D shape of plastic products.Save die sinking link, the production time can be saved, reduce production cost, be applicable to the plastic products that single-piece or small lot batch manufacture can directly use.
Accompanying drawing explanation
Fig. 1 is plastics mould-free forming device schematic diagram;
Fig. 2 is the of the present invention point of structural upright schematic diagram dripping parts;
Fig. 3 is the of the present invention point of close-up schematic view dripping parts;
Fig. 4 is the of the present invention point of schematic diagram dripping the major part nozzle needle of parts;
In figure, screw head 1, screw rod 2, lower cover screw 3, lower cover 4, machine barrel platform 5, charging aperture 6, machine barrel seat 7, upper press cover 8, upper press cover screw 9, machine barrel 10, check ring 11, injection nozzle screw 12, injection nozzle 13, plastic products workpiece 14, pallet 15, manipulator 16, manipulator base 17, gob 18, adjuster 19, actuator 20; Annular slab 21, unloading block 22, nozzle needle 23, accumulator 24, pressing plate 25, protective ring 26, case 27, nozzle bore 22 a, sealing ring 23a, actuating contact face 23b, elastic joint 23c, nook closing member 23d, lateral aperture 24a, upright opening 24b.
Detailed description of the invention
Plastics mould-free forming device of the present invention is made up of three parts.Part I is Plasticized component; Part II is a point parts; Part III is profiled part.
Part I Plasticized component, be similar to the Plasticized component in common injection machine, as shown in Figure 1, screw head 1, screw rod 2, lower cover screw 3, lower cover 4, machine barrel platform 5, charging aperture 6, machine barrel seat 7, upper press cover 8, upper press cover screw 9, machine barrel 10, check ring 11, injection nozzle screw 12, injection nozzle 13 is comprised.
Described machine barrel seat 7 is fixedly installed in machine barrel platform 5, machine barrel 10 is fixed in machine barrel seat 7 by lower cover 4 and upper press cover 8, lower cover 4 and upper press cover 8 are semicircular annulus separately, become a complete circle when both are combined, lower cover 4 and upper press cover 8 are fixedly mounted on machine barrel seat 7 respectively by upper press cover screw 9, lower cover screw 3; Machine barrel seat 7 there is charging aperture 6; Described machine barrel 10 has upright opening, and described upright opening is connected with the charging aperture 6 above machine barrel seat 7.
Machine barrel 10 has central through hole, and screw head 1 and screw rod 2 are arranged in the central through hole of machine barrel 10, and screw rod 2 can rotate and move along axis, and the screw channel of screw rod 2 and the inner hole wall of machine barrel 10 form flow channel space.Screw head 1 is fixedly mounted on the left end of screw rod 2, and check ring 11 internal diameter is larger than the diameter of screw head 1, and check ring 11 external diameter is equally large with machine barrel 10 central through hole diameter, and check ring 11 is enclosed within screw head 1 slidably.There is the injection nozzle 13 of endoporus to be fixedly mounted on the left end of machine barrel 10 by injection nozzle screw 12, cover machine barrel 10 central through hole from left end.
The charging aperture 6 of solid plastic material above machine barrel seat 7, the upright opening through machine barrel 10, the flow channel space that the hole wall entering the screw channel of screw rod 2 and the central through hole of machine barrel 10 is formed.Heat at the electric heating coil of machine barrel 10 outer wall, under the effect such as screw rod 2 rotary motion, plastics are mixing in runner, heating, melting, fluidify, and be delivered to injection nozzle 13.When screw rod 2 is moved to the left along axis, check ring 11 withstands the end of screw rod 2, stops fluid plastic to be back to flow channel space to the right along runner, makes the plastic liquid of injection nozzle 13 produce high pressure simultaneously, penetrates from injection nozzle 13.
Part II divides a parts, comprises annular slab 21, unloading block 22, nozzle needle 23, accumulator 24, pressing plate 25, protective ring 26, case 27, actuator 20, adjuster 19; Lateral aperture 24a is had to be connected with Plasticized component injection nozzle 13 in accumulator 24.Upright opening 24b is had in accumulator 24, the upper end in this hole has the sealing ring 23a of nozzle needle 23 to close, lower end has unloading block 22 to seal, unloading block 22 has a tiny nozzle hole 22a to communicate with the external world, the nook closing member 23d of nozzle needle 23 is in the nozzle bore 22a of unloading block 22, blocked by nozzle bore 22a when nook closing member 23d is depressed, then needle-valve is in closed condition, and material can not flow out.When nook closing member 23d lifts, nozzle bore 22a opens, outwardly spraying of material.Annular slab 21 is arranged on accumulator 24 lower end, and unloading block 22 is pressed in upright opening 24b, and material is injected into shaping area by nozzle bore 22a, namely on pallet 15.The sealing ring 23a of nozzle needle 23 is fixed between pressing plate 25 and accumulator 24.Pressing plate 25 outer is with protective ring 26 to reduce vibrations and noise and to install case 27.The lower end of actuator 20 withstands on the 23b of actuating contact face, and the upper end of actuator 20 is spacing by adjuster 19.Actuator 20 is made up of piezo-electric crystal, can extend under electric field action, thus nook closing member 23d toward pressing down, blocks nozzle bore 22b.Flexible joint 23c in the middle of nozzle needle 23, the electric field of actuator 20 is eliminated, and during retracted in length, under the resilient force of elastic joint 23c, nook closing member 23d lifts, and nozzle bore 22b opens.The upper end position of the adjustable actuator 20 of adjuster 19, thus the initial position regulating nook closing member 23d, or perhaps the preset tension force of adjustable elastic joint 23c.
Nook closing member 23d as switching mechanism is connected by elastic joint 23c with between fixing seal ring 23a, and from center outward, material is thinning gradually for elastic joint 23c; This elastic joint 23c mono-aspect shape is similar to material bridge, is on the other hand and is controlled by actuator 20 and correspond to the position of elastic recovery.In other side, actuator 20 directly or by intermediary element can act on contact surface 23b.Tripper closes the nozzle bore 22a of unloading block 22 by nozzle nook closing member 23d.
The nook closing member 23d of nozzle needle 23 is coupled directly to elastic joint 23c, plays sealing function, the liquid phase material in accumulator 24 and extraneous actuator 20 is isolated, and does not need extra potted component.Due to special geometrical configuration, elastic joint 23c has the characteristic storing and recover the energy collected when actuator 20 runs in outside, and actuator 20 and the connection of accumulator 24 under high pressure, the condition of high temperature are achieved in the mode of minimal-contact area, one-sided power effect.
The HTHP divert molten plastic flow from Part I Plasticized component is filled with in the inner chamber of accumulator 24, under the acting in conjunction of the elastic joint 23c of actuator 20 and nozzle needle 23 upper end, nozzle bore 22a alternately opens, closes, plastic liquid goes out from nozzle bore 22a sequentially segmentation jet flow, due to the high viscosity of molten plastic, the plastic liquid that jet flow goes out forms spherical gob 18 in space.Part II divides the effect of dripping parts to be the sphere plastic drops sequentially spraying each self-separation in fixing position and fixing direction (being generally vertically downward).
Part III is profiled part, comprises pallet 15, manipulator 16, manipulator base 17.Manipulator 16 is arranged on manipulator base 17, and can rotate around vertical axis, manipulator 16 comprises the movable joint of multiple controlled system drive, and the end of manipulator 16 can be made within the scope of certain space to be in optional position and any direction.The end of manipulator 16 is provided with pallet 15, and on pallet 15, support the plastic products workpiece 14 in process.
According to the joint motions of the three-dimensional CAD model Data Control manipulator 16 of the plastic products of required shape, make the pallet 15 be mounted thereon move to the position corresponding with working position and direction, accept and divide from Part II the gob 18 dripping parts ejection.Gob 18 is piled up on pallet 15, together deadlocked due to the viscosity of molten plastic, moves cooling curing gradually in time, finally becomes the plastic products workpiece 14 of required shape.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (3)
1. a plastics mould-free forming device, comprises Plasticized component, point droplet parts and profiled part; It is characterized in that, described point drips parts and comprises annular slab (21), unloading block (22), nozzle needle (23), accumulator (24), pressing plate (25), protective ring (26), case (27), actuator (20), adjuster (19) etc.; Described case (27), protective ring (26), accumulator (24) are installed from top to bottom successively, and pressing plate (25) is arranged in protective ring (26) and encloses, described pressing plate (25) has central through hole; Described adjuster (19) is arranged on case (27) top; Accumulator (24) has lateral aperture (24a) and upright opening (24b), and upright opening (24b) upper end communicates with the central through hole of pressing plate (25), and side communicates with lateral aperture (24a); Nozzle needle (23) comprises sealing ring (23a), elastic joint (23c), nook closing member (23d), and sealing ring (23a) is fixed between pressing plate (25) and accumulator (24); Described elastic joint (23c) is positioned at the bottom of sealing ring (23a), and both form bowl structure, and from center outward, material is thinning gradually for described elastic joint (23c); Nook closing member (23d) is coupling in elastic joint (23c) lower surface center; ; Actuator (20) is arranged in case (27), and adjuster (19) is withstood in upper end, and lower end extend in the central through hole of pressing plate (25), withstands the actuating contact face (23b) of elastic joint (23c); Unloading block (22) is fixed on the lower end of upright opening (24b) by annular slab (21), and unloading block (22) has nozzle bore (22a); Described nozzle bore (22a) is positioned at immediately below nook closing member (23d).
2. device according to claim 1, it is characterized in that, described Plasticized component comprises screw head (1), screw rod (2), lower cover screw (3), lower cover (4), machine barrel platform (5), charging aperture (6), machine barrel seat (7), upper press cover (8), upper press cover screw (9), machine barrel (10), check ring (11), injection nozzle screw (12), injection nozzle (13); Described machine barrel seat (7) is fixedly installed in machine barrel platform (5), machine barrel (10) is fixed in machine barrel seat (7) by lower cover (4) and upper press cover (8), lower cover (4) and upper press cover (8) are semicircular annulus separately, become a complete circle when both are combined, lower cover (4) and upper press cover (8) are fixedly mounted on machine barrel seat (7) respectively by upper press cover screw (9), lower cover screw (3); Machine barrel seat (7) there is charging aperture (6); Described machine barrel (10) has upright opening, and described upright opening is connected with the charging aperture (6) of machine barrel seat (7) top; Machine barrel (10) has central through hole, and screw head (1) and screw rod (2) are arranged in the central through hole of machine barrel (10), and the hole wall of the screw channel of screw rod (2) and the central through hole of machine barrel (10) forms flow channel space; Screw head (1) is fixedly mounted on the left end of screw rod (2), and check ring (11) external diameter is identical with machine barrel (10) central through hole diameter, is enclosed within screw head (1) slidably; There is the injection nozzle of endoporus (13) to be fixedly mounted on the left end of machine barrel (10) by injection nozzle screw (12), cover machine barrel (10) central through hole from left end.
3. device according to claim 1, is characterized in that, described profiled part comprises pallet (15), manipulator (16), manipulator base (17); Manipulator (16) is arranged on manipulator base (17), and manipulator (16) comprises multiple movable joint; Pallet (15) is arranged on the end of manipulator (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510264837.1A CN104890239B (en) | 2015-05-22 | 2015-05-22 | A kind of plastics mould-free forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510264837.1A CN104890239B (en) | 2015-05-22 | 2015-05-22 | A kind of plastics mould-free forming device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104890239A true CN104890239A (en) | 2015-09-09 |
| CN104890239B CN104890239B (en) | 2017-03-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510264837.1A Expired - Fee Related CN104890239B (en) | 2015-05-22 | 2015-05-22 | A kind of plastics mould-free forming device |
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| Country | Link |
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| CN (1) | CN104890239B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106493828A (en) * | 2016-12-14 | 2017-03-15 | 河北工业大学 | A kind of slurry extrusion system |
Citations (6)
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|---|---|---|---|---|
| DE2234156A1 (en) * | 1972-07-12 | 1974-01-31 | Karl Hehl | Closable injection moulding nozzle - with valve body movable into opened and closed positions by injection pressure |
| DE4222510C1 (en) * | 1992-07-09 | 1993-12-09 | Edmund Ullisperger | Valve gate for plastic molding compounds |
| JP2002120240A (en) * | 2000-10-18 | 2002-04-23 | Toyo Tire & Rubber Co Ltd | Mixed resin liquid discharging apparatus and resin liquid injection nozzle |
| CN1861363A (en) * | 2005-05-13 | 2006-11-15 | 杜雅 | Needle valve type spray nozzle |
| CN201721001U (en) * | 2010-05-01 | 2011-01-26 | 广州达意隆包装机械股份有限公司 | Pressure-retaining injection nozzle |
| CN104149352A (en) * | 2014-08-27 | 2014-11-19 | 三亚思海创新机电工程设计有限公司 | Printing head for 3D printer |
-
2015
- 2015-05-22 CN CN201510264837.1A patent/CN104890239B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2234156A1 (en) * | 1972-07-12 | 1974-01-31 | Karl Hehl | Closable injection moulding nozzle - with valve body movable into opened and closed positions by injection pressure |
| DE4222510C1 (en) * | 1992-07-09 | 1993-12-09 | Edmund Ullisperger | Valve gate for plastic molding compounds |
| JP2002120240A (en) * | 2000-10-18 | 2002-04-23 | Toyo Tire & Rubber Co Ltd | Mixed resin liquid discharging apparatus and resin liquid injection nozzle |
| CN1861363A (en) * | 2005-05-13 | 2006-11-15 | 杜雅 | Needle valve type spray nozzle |
| CN201721001U (en) * | 2010-05-01 | 2011-01-26 | 广州达意隆包装机械股份有限公司 | Pressure-retaining injection nozzle |
| CN104149352A (en) * | 2014-08-27 | 2014-11-19 | 三亚思海创新机电工程设计有限公司 | Printing head for 3D printer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106493828A (en) * | 2016-12-14 | 2017-03-15 | 河北工业大学 | A kind of slurry extrusion system |
| CN106493828B (en) * | 2016-12-14 | 2018-11-09 | 河北工业大学 | A kind of slurry extrusion system |
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| Publication number | Publication date |
|---|---|
| CN104890239B (en) | 2017-03-01 |
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Granted publication date: 20170301 |