CN104400957A - Injection molding foaming machine - Google Patents
Injection molding foaming machine Download PDFInfo
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- CN104400957A CN104400957A CN201410502740.5A CN201410502740A CN104400957A CN 104400957 A CN104400957 A CN 104400957A CN 201410502740 A CN201410502740 A CN 201410502740A CN 104400957 A CN104400957 A CN 104400957A
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- charging cylinder
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- control valve
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Abstract
The invention provides an injection molding foaming machine, comprising a feeding machine, a feeding cylinder and a pushing cylinder. A one-way pump is arranged between the feeding cylinder and the pushing cylinder; a one-way valve is in series connection between the outlet of the one-way pump and the pushing cylinder; the outlet of the pushing cylinder is provided with a control valve; the outlet of the control valve is provided with a jet nozzle; the control valve is connected to a control oil cylinder for controlling the opening and closing of the control valve; a piston I is arranged in the feeding cylinder, and the piston I is connected with the hydraulic oil cylinder; a piston II is arranged in the pushing cylinder, and the piston II is connected with a hydraulic oil cylinder II; the hydraulic oil cylinder I and the hydraulic oil cylinder II are in constant pressure; and a temperature and pressure sensor is arranged in the feeding cylinder. The invention combines thermoplastic plastic extrusion and injection molding; a physical foaming agent is injected in the extrusion part and gas is dissolved in injection molding material under static conditions by the feeding cylinder; by adjusting the dosage of the foaming agent and the pressure in the feeding cylinder and pushing cylinder, the foaming rate of the product can be adjusted between 1 and 50 times at random.
Description
Technical field
The present invention relates to injection foaming equipment technical field, be specifically related to a kind of injection foaming machine.
Background technology
Common physical injection foaming has gas aided injection mould, microballoon to foam and bead foam three kinds of methods in the world now, well solves thick product and shrinks trace and the weight effectively alleviating goods.General foaming product has large-scale housing, bead foam to pack and padded coaming, material for sole of shoe (material for sole of shoe only has small part to adopt microballoon foaming technique, most employing chemical foaming technology).
Current gas aided injection mould apparatus does not focus on foam structure, and can not realize high magnification foaming, current expansion ratio is generally within the scope of 1 ~ 2 times simultaneously.Microballoon expansion ratio can be higher, but because of microballoon blowing agent cost too high, inconvenience promote the use of on the universal product.Bead foam can realize high magnification (can reach 60 times), but because technology path limited, first need produce fixed multiplying power bead (maybe bead can be sent out) molded again, goods expansion ratio can not arbitrarily adjust, material category is also restricted simultaneously, there will be a known EPS, EPP, EPU tri-kinds at present.
Summary of the invention
The object of the invention is for overcoming above-mentioned the deficiencies in the prior art, providing that a kind of structure is simple, opening and closing stroke is short and the switching mechanism of the automatic FLASH POINT analyzer pot cover of reliable in action.
For achieving the above object, the present invention adopts following technical proposals: a kind of injection foaming machine, comprise one for inject foaming raw material charger, with charger outlet for the charging cylinder of temporary foaming raw material and the charging cylinder for foam-injection material; One-way pump foaming raw material being entered charging cylinder from charging cylinder pump is provided with between described charging cylinder and charging cylinder, check valve is serially connected with between described unidirectional delivery side of pump and charging cylinder, the outlet of charging cylinder is provided with the control valve of a control foaming raw material injection, the outlet of control valve is provided with jet blower, and control valve is connected for the control oil cylinder controlling control valve opening and closing with one; Be provided with piston I in described charging cylinder, piston I connects a hydraulic jack I; Be provided with piston II in described charging cylinder, piston II connects a hydraulic jack II; Described hydraulic jack I and hydraulic jack II provide power by a hydraulic system and maintain constant voltage; Position near one-way pump in described charging cylinder is provided with temperature and pressure transmitter.
During work, the reinforced pressure of charger is greater than the pressure in charging cylinder, foaming raw material and foamed gas mixture are via injecting feeding cylinder after the preliminary mixed dissolution of charger, now piston I is progressively extruded rollback, foaming raw material mixture dissolves further in the constant-pressure conditions of charging cylinder, open one-way pump and foaming raw material mixture is injected charging cylinder, now the injection pressure of one-way pump is greater than the pressure in charging cylinder, piston II rollback, after in charging cylinder, raw mixture reaches set amount, control cylinder action control valve is opened, hydraulic jack II promotes piston II and is penetrated by raw mixture, enter mould.
With improvement, static mixer is serially connected with between the outlet of described charger and the entrance of described charging cylinder.Adopt the technical program that raw mixture can be made again to mix when entering charging cylinder from charger, improve foaming effect.
Preferably, described control valve comprises housing, the material channel passed through for raw material is provided with in housing, in housing material channel path on be also provided with a spool slide block, part material passage is positioned at spool slide block, the contact surface of spool slide block and housing seals and is slidably matched, and spool slide block slides and material channel is turned on or off in housing, and described spool slide block is connected with the piston controlling oil cylinder; One end of described control valve is communicated with the outlet of charging cylinder, and the other end is provided with jet blower.After adopting this technical scheme, control oil cylinder push-and-pull spool slide block thus open and close control valve, control valve also can not block after a long time use, and on-off action completes by controlling oil cylinder, adds the reliability of action.
Described one-way pump is a gear pump.Gear pump is adopted to be not easy blocking and foaming raw material mixture can be made to mix further.
With improvement, be provided with the screw rod of a connection rotating driving device in described charger, described screw rod is divided into three sections along the direction of motion of foaming raw material, and the spiral groove depth of interlude is less than all the other spiral groove depths of two sections.Screw rod adopts darker screw channel can ensure the stability of charging and discharging at the two ends of charging and discharging, and interlude adopts less spiral groove depth foaming raw material mixture can be made thinner, and is conducive to foamed gas and dissolves, improve foaming effect.
The invention has the beneficial effects as follows: thermoplastic is extruded and combined with injection molding technology by the present invention, physical blowing agent (comprising the gases such as CO2, N2, C 6H10) is injected at extruding part, again by charging cylinder static conditions by gas dissolution in the middle of injection raw material, by the pressure in adjustment blowing agent (gas) addition and charging cylinder and charging cylinder, the expansion ratio of goods can be made arbitrarily to regulate between 1 ~ 50 times; The present invention can forming shape is complicated, wall thickness deviation is large large-scale product, and can adapt to multiple thermoplastic.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is configuration diagram of the present invention;
Fig. 2 is the structural representation of control valve part;
Fig. 3 is the structural representation of screw rod.
Shown in figure: 1, charger, 1.1, screw rod, 2, charging cylinder, 3, gear pump, 4, check valve, 5, hydraulic jack I, 6, hydraulic jack II, 7, static mixer, 8, piston I, 9, piston II, 10, control valve, 11, spool slide block, 12, material channel, 13, jet blower, 14, charging cylinder, 15, housing, 16 control oil cylinders, 17, temperature and pressure transmitter.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
A kind of injection foaming machine as shown in Fig. 1 to Fig. 3, comprise one for inject foaming raw material charger 1, with charger 1 outlet the charging cylinder 14 for temporary foaming raw material mixture and the charging cylinder 2 for foam-injection material; Be provided with the gear pump 3 foaming raw material being pumped into charging cylinder 2 from charging cylinder 14 between charging cylinder 14 and charging cylinder 2, be serially connected with check valve 4 between the outlet of gear pump 3 and charging cylinder 2, the outlet of charging cylinder 2 is provided with the control valve 10 of a control foaming raw material injection; Control valve 10 comprises housing 15, the material channel 12 passed through for raw material is provided with in housing 15, in housing 15 material channel 12 path on be also provided with a spool slide block 11, part material Channel 12-Bit is in spool slide block 11, spool slide block 11 seals with the contact surface of housing 15 and is slidably matched, spool slide block 11 slides and material channel 12 is turned on or off in housing 15, spool slide block 11 is connected with the piston controlling oil cylinder 16, one end of control valve 10 is communicated with the outlet of charging cylinder 2, and the other end is provided with jet blower 13; Piston I 8 is provided with, piston I 8 connecting fluid compressing cylinder I 5 in described charging cylinder 14; Piston II 9 is provided with, piston II 9 connecting fluid compressing cylinder II 6 in described charging cylinder 2; Described hydraulic jack I 5 and hydraulic jack II 6 provide power by a hydraulic system and maintain constant voltage; Position near gear pump 3 in charging cylinder 14 is provided with temperature and pressure transmitter.
Static mixer 7 is serially connected with between the outlet of charger 1 and the entrance of charging cylinder 14.
Be provided with the screw rod 1.1 of a connection rotating driving device in charger 1, screw rod 1.1 is divided into A, B, C tri-sections along the direction of motion of foaming raw material, and the spiral groove depth of B section is less than all the other spiral groove depths of two sections.
During work, the reinforced pressure of charger 1 is greater than the pressure in charging cylinder, foaming raw material and foamed gas mixture are via injecting feeding cylinder 14 after the preliminary mixed dissolution of charger 1, now piston I 8 is progressively extruded rollback, foaming raw material mixture dissolves further in the constant-pressure conditions of charging cylinder 14, open gear pump 3 and foaming raw material mixture is injected charging cylinder 2, now the injection pressure of gear pump 3 is greater than the pressure in charging cylinder 2, piston II 9 rollback, after in charging cylinder 2, raw mixture reaches set amount, control oil cylinder 16 action and promote spool slide block 11, control valve 10 is opened, hydraulic jack II 6 promotes piston II 9 and is penetrated by raw mixture, enter mould, then control oil cylinder 16 to bounce back, pull spool slide block 11, closed control valve 10, now foaming raw material mixture alive continues to enter charging cylinder 2, piston II 9 rollback, injection process is repeated again after set amount to be achieved.Piston I 8 is driven to move around by hydraulic jack I 5 according to the discharge capacity of gear pump 3 and maintains constant pressure in charging cylinder 14 in charging cylinder 14 in process of production.
Certainly, the realization of the present embodiment also needs for each hydraulic unit provides the hydraulic power system of power and the auxiliary of electronic control system, but these are prior art, just repeat no more at this.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. an injection foaming machine, is characterized in that: comprise one for inject foaming raw material charger, with charger outlet for the charging cylinder of temporary foaming raw material and the charging cylinder for foam-injection material; One-way pump foaming raw material being entered charging cylinder from charging cylinder pump is provided with between described charging cylinder and charging cylinder, check valve is serially connected with between described unidirectional delivery side of pump and charging cylinder, the outlet of charging cylinder is provided with the control valve of a control foaming raw material injection, the outlet of control valve is provided with jet blower, and control valve is connected for the control oil cylinder controlling control valve opening and closing with one; Be provided with piston I in described charging cylinder, piston I connects a hydraulic jack I; Be provided with piston II in described charging cylinder, piston II connects a hydraulic jack II; Described hydraulic jack I and hydraulic jack II provide power by a hydraulic system and maintain constant voltage; Position near one-way pump in described charging cylinder is provided with temperature and pressure transmitter.
2. injection foaming machine according to claim 1, is characterized in that: be serially connected with static mixer between the outlet of described charger and the entrance of described charging cylinder.
3. injection foaming machine according to claim 1, it is characterized in that: described control valve comprises housing, the material channel passed through for raw material is provided with in housing, in housing material channel path on be also provided with a spool slide block, part material passage is positioned at spool slide block, the contact surface of spool slide block and housing seals and is slidably matched, and spool slide block slides and material channel is turned on or off in housing, and described spool slide block is connected with the piston controlling oil cylinder; One end of described control valve is communicated with the outlet of charging cylinder, and the other end is provided with jet blower.
4. injection foaming machine according to claim 1, is characterized in that: described one-way pump is a gear pump.
5. injection foaming machine according to claim 1, it is characterized in that: the screw rod being provided with a connection rotating driving device in described charger, described screw rod is divided into three sections along the direction of motion of foaming raw material, and the spiral groove depth of interlude is less than all the other spiral groove depths of two sections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410502740.5A CN104400957A (en) | 2014-09-26 | 2014-09-26 | Injection molding foaming machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410502740.5A CN104400957A (en) | 2014-09-26 | 2014-09-26 | Injection molding foaming machine |
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| Publication Number | Publication Date |
|---|---|
| CN104400957A true CN104400957A (en) | 2015-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410502740.5A Pending CN104400957A (en) | 2014-09-26 | 2014-09-26 | Injection molding foaming machine |
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| CN (1) | CN104400957A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106182888A (en) * | 2016-08-30 | 2016-12-07 | 中山市信立富机械科技有限公司 | A kind of feeding machanism that constant pressure is provided |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5422469A (en) * | 1977-07-21 | 1979-02-20 | Asahi Chem Ind Co Ltd | Foam injection molding |
| CN1555972A (en) * | 2003-12-30 | 2004-12-22 | 刘津平 | Polymer material extrusion injection shaping method and its device |
| TW201043439A (en) * | 2009-06-08 | 2010-12-16 | Lu Xiao Ting | Injection-molding method for foaming plastics and equipment thereof |
| CN103057061A (en) * | 2012-12-20 | 2013-04-24 | 华南理工大学 | Device and method for efficient mixed microcellular foaming plastic precise injection molding |
| CN204123576U (en) * | 2014-09-26 | 2015-01-28 | 刘俊卿 | A kind of injection foaming machine |
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2014
- 2014-09-26 CN CN201410502740.5A patent/CN104400957A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5422469A (en) * | 1977-07-21 | 1979-02-20 | Asahi Chem Ind Co Ltd | Foam injection molding |
| CN1555972A (en) * | 2003-12-30 | 2004-12-22 | 刘津平 | Polymer material extrusion injection shaping method and its device |
| TW201043439A (en) * | 2009-06-08 | 2010-12-16 | Lu Xiao Ting | Injection-molding method for foaming plastics and equipment thereof |
| CN103057061A (en) * | 2012-12-20 | 2013-04-24 | 华南理工大学 | Device and method for efficient mixed microcellular foaming plastic precise injection molding |
| CN204123576U (en) * | 2014-09-26 | 2015-01-28 | 刘俊卿 | A kind of injection foaming machine |
Non-Patent Citations (5)
| Title |
|---|
| 杨东浩: "《塑料制品成型工艺》", 31 March 2007, 中国纺织出版社 * |
| 王兴天: "《注塑工艺与设备》", 31 January 2010, 化学工业出版社 * |
| 王加龙: "《塑料注射成型》", 31 August 2009, 印刷工业出版社 * |
| 黎伟泉: "《设备拆装与维护实训》", 31 May 2012, 华南理工大学出版社 * |
| 龙云正 等: "同向双螺杆挤出机变头变径变深螺杆组合及其应用", 《中国塑料》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106182888A (en) * | 2016-08-30 | 2016-12-07 | 中山市信立富机械科技有限公司 | A kind of feeding machanism that constant pressure is provided |
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Application publication date: 20150311 |
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