CN103640129A - Demolding method of thin-wall rubber bellow - Google Patents
Demolding method of thin-wall rubber bellow Download PDFInfo
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- CN103640129A CN103640129A CN201310733456.4A CN201310733456A CN103640129A CN 103640129 A CN103640129 A CN 103640129A CN 201310733456 A CN201310733456 A CN 201310733456A CN 103640129 A CN103640129 A CN 103640129A
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Abstract
The invention discloses a demolding method of a thin-wall rubber bellow, and belongs to the field of production of thin-wall rubber bellows. The demolding method comprises the following steps: (1) after taking down an external die, keeping a rubber bellow in which a fishbone die core is sheathed; (2) sheathing the rubber bellow in a circular tube demolding tool, wherein the circular tube demolding tool is a circular tube and the inner diameter of the circular tube is equal to two times of a peak diameter of a rubber bellow die core (which is the fishbone die core); (3) injecting air in a gap between the rubber bellow and the fishbone die core, wherein an air pressure is equal to 0.5-0.6 MPa; (4) quickly pulling the circular tube demolding tool out along with an axial direction of the rubber bellow; and (5) taking the rubber bellow out of the circular tube demolding tool, thus finishing demolding. The demolding method of the thin-wall rubber bellow can be applicable to a complex thin-wall rubber bellow of which a ratio of a peak diameter to a trough diameter is greater than 1.3. The labor-saving, time-saving, energy-saving, low-cost and efficient aims can be achieved; the rejection rate can be obviously reduced; the waste of the raw material and energy can be reduced.
Description
Technical field
The invention belongs to the production field of thin-walled rubber bellows, specifically, relate to a kind of release method of thin-walled rubber bellows.
Background technology
Thin-walled rubber bellows is widely used in the every field of space flight, petrochemical industry, motion shaft coupling, chemical industry and automobile industry; bellows has elasticity; under pressure, axial force, cross force or Moment, can produce displacement; bellows is as seal isolation element, and the rotary part that product is applied to the products such as automobile mechanical electrical equipment plays the purposes of rotating and protecting.
In actual production, for the difference of article shape, adopt different molding sulfuration methods, there is the common core mould pressing method that has, comprise that integral mould core and segmental mandrel core are molded; Inflation method and the two combination carry out the method for moulded products etc.
The selection of molding sulfuration process is main relevant with product instructions for use with shape of product, secondly relevant with the performance of sizing material used.Because there is core stampings size easily to guarantee, product density and inside and outside surface quality are high.So high when the instructions for use of product, when its shape and specification can realize core pressure, answer first-selection to have core to press.When having core press moulding mode to realize or product requirement is not high, for saving die cost, generally select the molding sulfuration process method of inflation method and the two combination.The core rod that has core to press is divided into integral mould core and split-type core rod.
Most bellowss all adopt integral mould core mold pressing.The product glue limit of integral mould core is few, and outward appearance and inner surface quality are good, and the problem of answering emphasis to consider in Design of Dies is the demoulding of integral mould core and the processing of mould.Reply core rod stripping means has sufficient consideration, the release method of integral mould core mould have manual withdrawing, mechanical withdrawing, peel manually from the mode such as inflation extrusion.
(1) manual withdrawing be applied to that specification is little, product thickness is greater than 3mm, the capsule of simple shape cover based article.Most of capsule cover based article can be extracted by hand, and application at most in practice.
(2) mechanical withdrawing is applied to that specification is large, the medium above capsule cover of sizing material hardness based article.Machinery withdrawing is generally used for large product, in reality, seldom relates to.
(3) peel manually is from, wall thickness low for sizing material hardness, complex-shaped bellows and thin-walled capsule based article.General thin-wall corrugated tube is all adopted and is taken out in this way core rod.
(4), while adopting above several modes to take out for some small-sized goods, have compressed air condition can adopt compressed air inflation that product is swollen and the method taken off from core rod, but exist easily blow fried, the problem such as waste product is many, difficult control.
In routine techniques, consider the ratio in the Jing Yugu footpath, peak of bellows.In order to strip goods part convenient (when mandrel is overall structure), be conducive to the extraction of core, the technological guidance of design requires choosing of peak valley diameter ratio to be less than or equal to 1.3 as far as possible, because above four kinds of methods have all been difficult to that peak valley diameter ratio is greater than to 1.3 rubber bellows, carries out the demoulding.And in actual production life, the corrugated rubber pipe that peak valley diameter ratio is greater than 1.3 need to be used in a lot of places, so be badly in need of a kind ofly solving the method that peak valley diameter ratio is greater than 1.3 the corrugated rubber pipe demoulding.
China Patent No. 201320039955.9, open day 2013-07-17, the patent document that a name is called a kind of quick rubber wireway stripper apparatus is disclosed, it comprises clamping sleeve, and the inside of clamping sleeve is provided with compact heap, push rod and big spring, and big spring is enclosed within on push rod, described push rod front end outer wall is provided with and imports cone, push rod front end inside is provided with for placing the cavity of core rod, and push rod middle part is provided with the pore being connected with cavity, and tail end is connected with handle; Described compact heap is arranged between clamping sleeve front end and push rod, and compact heap is also connected to push rod by little spring; Described pore and extraneous junction are provided with ventilation nozzle.This utility model can realize fast demoulding after compressing to rubber wireway; It is mainly the demoulding for rubber wireway, and for ripple class rubber, the corrugated rubber pipe that can only be less than 1.3 for peak valley diameter ratio.But exist operating process complicated, operating efficiency is low, especially, when core rod is put into the cavity of this utility model, for a core rod, by a plurality of branches, once produce the more add operation inconvenience of the demoulding of a plurality of bellowss, efficiency is low.
China Patent Publication No. 102773951A, open day on November 14th, 2012, disclose a name and be called a kind of patent application document that adopts stripper apparatus to produce the method for corrugated hose, employing stripper apparatus is realized, first with floating holder, clamp sebific duct, avoid gas leakage, then put into sebific duct protective jacket; Blow again, by pressure-reducing valve, control air pressure at 0.1～0.3MPa, avoid instantaneous pressure and stress raisers; By sebific duct protective jacket, control product expansion rate simultaneously and be no more than 50% of change in outside diameter, avoid surpassing the elongation at break of sizing material itself, thus the phenomenon that while reducing the demoulding, product breaks.This invention replaces original direct air blowing mould release mode, has increased sebific duct protective jacket, and while solving the demoulding, the easy splintering problem of product, has reduced percent defective, enhances productivity.But this technical scheme still exists very large defect, being first exactly to be greater than 1.3 corrugated rubber pipe for peak valley diameter ratio cannot the demoulding; Secondly, the method is in practical operation, can still there is the situation of withdrawing pattern difficulty in discovery, especially, after air blowing, rubber sealing tube can be retracted on core rod, need inflation and the successful demoulding of withdrawing pattern ability repeatedly, finally, the method need to be by a device, and in the operation of actual factory, the demoulding of especially once producing the manufacture craft of a plurality of bellowss by a plurality of branches for the core rod adopting during large batch of produce in factory more operates inconvenience, and efficiency is low.
Summary of the invention
1. the problem that will solve
For the core rod demoulding to rubber bellows in prior art, have difficulties, especially cannot be greater than 1.3 corrugated rubber pipe to peak valley diameter ratio and carry out fast demoulding, and the good method of neither one can once be produced for a core rod problem of the demoulding of this batch production manufacture craft of a plurality of bellowss by a plurality of branches, the invention provides a kind of release method of thin-walled rubber bellows, it can complete the core rod demoulding of rubber bellows fast, especially being applicable to peak valley diameter ratio is greater than 1.3 corrugated rubber pipe and carries out fast demoulding, and can by a plurality of branches, once produce the demoulding of this batch production manufacture craft of a plurality of bellowss for a core rod.
2. technical scheme
In order to address the above problem, the technical solution adopted in the present invention is as follows:
A release method for thin-walled rubber bellows, the steps include:
(1) take off after outer mold, leave the rubber bellows being enclosed within on fishbone core rod;
(2) pipe demoulding tooling in the outer cover of rubber bellows, described pipe demoulding tooling is a pipe, the interior diameter of described pipe equals 2 times of rubber bellows core rod (fishbone core rod) peak diameter; Rubber bellows core rod (fishbone core rod) as the case may be, for example only has a rubber bellows core rod, be exactly to select 2 times of rubber bellows core rod peak diameter so, and for the fishbone mold insert structure that has the core rod of a plurality of branches, be 2 times of peak diameter of choosing the core rod of the actual cover of rubber bellows;
(3) by one end of compressor gun head aligning rubber bellows and the gap between fishbone core rod, locate place, the gap injecting gas between rubber bellows and fishbone core rod; Described air pressure equals 0.5-0.6MPa;
(4) rubber bellows can be separated with fishbone core rod under the pressure-acting of gas, rubber bellows is close to the inner surface of pipe demoulding tooling, along the axial direction of rubber bellows, extract pipe demoulding tooling rapidly, now rubber bellows can be extracted along with one of pipe demoulding tooling;
(5) from pipe demoulding tooling, take out rubber bellows, the demoulding completes.
Preferably, in described step (2), the material of pipe demoulding tooling is PVC.
Preferably, in described step (3), gas is air or carbon dioxide or nitrogen.
Preferably, extracting pipe demoulding tooling and will complete in 2s after inflation in described step (4).
3. beneficial effect
Than prior art, beneficial effect of the present invention is:
(1) during the demoulding of the present invention in the outer cover of rubber bellows pipe demoulding tooling, compressor gun head is aimed at one end and the place, the gap between fishbone core rod of rubber bellows, place, gap injecting gas between rubber bellows and fishbone core rod, by Compressed Gas as demoulding medium, make product stressed evenly, especially the interior diameter of pipe equals this design of 2 times of rubber bellows core rod peak diameter, to play spacing expansion on the one hand, the not effect of cracky, this diameter also plays the effect that the rear rubber bellows that expands is close to the inner surface of pipe demoulding tooling simultaneously, the complex thin-wall rubber bellows that makes this method to be greater than 1.3 for peak valley diameter ratio,
(2) to select air pressure be 0.5-0.6MPa in the present invention, abandoned and originally thought that maximum gas pressure can only reach the technology prejudice of 0.1～0.3MPa, the interior diameter of the pipe that cooperation the present invention limits equals the design of 2 times of rubber bellows core rod peak diameter, such air pressure not only makes the rubber bellows demoulding fast, and do not have the air pressure that prior art is thought to cross the phenomenon appearance that conference causes rubber bellows to damage, extract more simple and fast of rubber bellows, tool has an unexpected effect simultaneously;
(3) material of pipe demoulding tooling of the present invention is PVC, like this under the gas pressure of 0.5-0.6MPa, can rapidly rubber bellows be close to the inwall of pipe demoulding tooling, and increase friction, be convenient to the demoulding, avoid occurring that pipe demoulding tooling has been extracted and pipe demoulding tooling is also stayed the situation of core rod;
(4) the present invention need to extract pipe demoulding tooling after inflation in 2s, is on the one hand to cause needing defuelling in order to prevent that rubber bellows from shrinking, and also from another angle, can find out that method efficiency of the present invention is high simultaneously;
(5) rubber technique of the present invention reached saving of labor, saved time, material-saving, the object that energy-conservation, cost is low, efficiency is high, percent defective is reduced, reduce the waste of raw material and the energy.
Accompanying drawing explanation
Fig. 1 is the view of the present invention while detecting.
In figure: 1, fishbone core rod; 2, pipe demoulding tooling; 3, rubber bellows; 4, compressor gun head.
The specific embodiment
Below in conjunction with concrete accompanying drawing, describe the present invention.
Embodiment 1
As shown in Figure 1, a kind of release method of thin-walled rubber bellows, the steps include:
(1) take off after outer mold, leave the rubber bellows 3 being enclosed within on fishbone core rod 1;
(2) pipe demoulding tooling 2 in the outer cover of rubber bellows 3, described pipe demoulding tooling 2 is a pipe, the interior diameter of described pipe equals 2 times of fishbone core rod 1 peak diameter; The material of pipe demoulding tooling 2 is PVC;
(3) by one end of compressor gun head 4 aligning rubber bellows 3 and the gap between fishbone core rod 1, locate place, the gap injecting gas between rubber bellows 3 and fishbone core rod 1; Gas is air; Described air pressure equals 0.5MPa;
(4) after inflation in 2s, along the axial direction of rubber bellows 3, extract pipe demoulding tooling 2 rapidly, rubber bellows 3 can be separated with fishbone core rod 1 under the pressure-acting of gas, rubber bellows 3 is close to the inner surface of pipe demoulding tooling 2, when extracting pipe demoulding tooling 2, rubber bellows 3 can be along with 2 one of pipe demoulding toolings are extracted;
(5) from pipe demoulding tooling 2, take out rubber bellows 3, the demoulding completes.
The present embodiment is the thin-walled rubber bellows that equals 1.3 for peak valley diameter ratio, the fishbone core rod 1 that the present embodiment adopts is that each fishbone core rod 1 has 6 rubber bellows core rods above, be that each fishbone core rod 1 has 6 rubber bellows to need the demoulding above, as shown in Figure 1, the peak diameter of rubber bellows core rod is 4cm; The thickness of thin-walled rubber bellows is 1mm, and length is 15cm, tests 3000 samples, all can complete rapidly the demoulding, and on average the demould time of each thin-walled rubber bellows is 10.1s.
With embodiment 1, difference is that the gas in step (3) is carbon dioxide, and air pressure equals 0.6MPa.The present embodiment is the thin-walled rubber bellows that equals 1.5 for peak valley diameter ratio, and the peak diameter of rubber bellows core rod is 6cm; The thickness of thin-walled rubber bellows is 1.2mm, and length is 10cm, tests 2520 samples, all can complete rapidly the demoulding, and on average the demould time of each thin-walled rubber bellows is 9.6s.
With embodiment 1, difference is that the gas in step (3) is nitrogen, and air pressure equals 0.56MPa.The present embodiment is the thin-walled rubber bellows that equals 1.4 for peak valley diameter ratio, and the peak diameter of rubber bellows core rod is 4cm; The thickness of thin-walled rubber bellows is 1mm, and length is 15cm, tests 1572 samples, all can complete rapidly the demoulding, and on average the demould time of each thin-walled rubber bellows is 10.5s.
Claims (4)
1. a release method for thin-walled rubber bellows, the steps include:
(1) take off after outer mold, leave the rubber bellows (3) being enclosed within on fishbone core rod (1);
(2) pipe demoulding tooling (2) in the outer cover of rubber bellows (3), described pipe demoulding tooling (2) is a pipe, the interior diameter of described pipe equals 2 times of fishbone core rod (1) peak diameter;
(3) by compressor gun head (4), aim at one end and the place, the gap between fishbone core rod (1) of rubber bellows (3), place, the gap injecting gas between rubber bellows (3) and fishbone core rod (1); Described air pressure equals 0.5-0.6MPa;
(4) rubber bellows (3) can be separated with fishbone core rod (1) under the pressure-acting of gas, rubber bellows (3) is close to the inner surface of pipe demoulding tooling (2), along the axial direction of rubber bellows (3), extract pipe demoulding tooling (2) rapidly, now rubber bellows (3) can be along with (2) one of pipe demoulding toolings are extracted;
(5) from pipe demoulding tooling (2), take out rubber bellows (3), the demoulding completes.
2. the release method of a kind of thin-walled rubber bellows according to claim 1, is characterized in that: in described step (2), the material of pipe demoulding tooling (2) is PVC.
3. the release method of a kind of thin-walled rubber bellows according to claim 1, is characterized in that: in described step (3), gas is air or carbon dioxide or nitrogen.
4. according to the release method of a kind of thin-walled rubber bellows described in any one in claim 1-3, it is characterized in that: extracting pipe demoulding tooling (2) and will complete in 2s after inflation in described step (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310733456.4A CN103640129A (en) | 2013-12-27 | 2013-12-27 | Demolding method of thin-wall rubber bellow |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310733456.4A CN103640129A (en) | 2013-12-27 | 2013-12-27 | Demolding method of thin-wall rubber bellow |
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| CN103640129A true CN103640129A (en) | 2014-03-19 |
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| CN201310733456.4A Pending CN103640129A (en) | 2013-12-27 | 2013-12-27 | Demolding method of thin-wall rubber bellow |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105382976A (en) * | 2015-12-01 | 2016-03-09 | 苏州井上橡塑有限公司 | Fast mold picking jig used for automobile wire harness |
| CN106696140A (en) * | 2015-07-28 | 2017-05-24 | 保定威奕汽车有限公司 | Wire harness protection sleeve demolding device |
| CN107415106A (en) * | 2017-05-04 | 2017-12-01 | 厦门麦丰密封件有限公司 | A kind of stripper apparatus |
| CN108150189A (en) * | 2016-12-05 | 2018-06-12 | 上海清远管业科技有限公司 | The quick removing device of shield duct piece Grouting Pipe and form removal method |
| CN108698285A (en) * | 2016-01-19 | 2018-10-23 | 哈佛学院院长及董事 | Soft robot actuator and clamper |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH08216162A (en) * | 1995-02-14 | 1996-08-27 | Nok Megurasutikku Kk | Release device of hollow rubber molded product |
| CN1958269A (en) * | 2005-10-31 | 2007-05-09 | 财团法人工业技术研究院 | Forming stripper, and method |
| CN102773951A (en) * | 2012-08-14 | 2012-11-14 | 柳州日高橡胶制品有限责任公司 | Method for producing corrugated rubber hose by using demoulding device |
| CN202727181U (en) * | 2012-06-27 | 2013-02-13 | 安徽宁国中鼎模具制造有限公司 | Mold core assembly of automobile brake lever protection sleeve injection mold |
| CN203063020U (en) * | 2013-01-25 | 2013-07-17 | 湖北华强科技有限责任公司 | Fast rubber air-guide tube demoulding device |
-
2013
- 2013-12-27 CN CN201310733456.4A patent/CN103640129A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08216162A (en) * | 1995-02-14 | 1996-08-27 | Nok Megurasutikku Kk | Release device of hollow rubber molded product |
| CN1958269A (en) * | 2005-10-31 | 2007-05-09 | 财团法人工业技术研究院 | Forming stripper, and method |
| CN202727181U (en) * | 2012-06-27 | 2013-02-13 | 安徽宁国中鼎模具制造有限公司 | Mold core assembly of automobile brake lever protection sleeve injection mold |
| CN102773951A (en) * | 2012-08-14 | 2012-11-14 | 柳州日高橡胶制品有限责任公司 | Method for producing corrugated rubber hose by using demoulding device |
| CN203063020U (en) * | 2013-01-25 | 2013-07-17 | 湖北华强科技有限责任公司 | Fast rubber air-guide tube demoulding device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106696140A (en) * | 2015-07-28 | 2017-05-24 | 保定威奕汽车有限公司 | Wire harness protection sleeve demolding device |
| CN105382976A (en) * | 2015-12-01 | 2016-03-09 | 苏州井上橡塑有限公司 | Fast mold picking jig used for automobile wire harness |
| CN108698285A (en) * | 2016-01-19 | 2018-10-23 | 哈佛学院院长及董事 | Soft robot actuator and clamper |
| CN108150189A (en) * | 2016-12-05 | 2018-06-12 | 上海清远管业科技有限公司 | The quick removing device of shield duct piece Grouting Pipe and form removal method |
| CN107415106A (en) * | 2017-05-04 | 2017-12-01 | 厦门麦丰密封件有限公司 | A kind of stripper apparatus |
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Effective date of registration: 20160819 Address after: 210061 Jiangsu Province dragon High-tech Zone of Nanjing City Road No. 6 Applicant after: Nanjing Jinsanli Polymer Technology Co Ltd Address before: 210061 Jiangsu city of Nanjing province Nanjing high tech Development Zone, Liuzhou Road No. 6 Applicant before: Nanjing Jinsanli Rubber & Plastic Co., Ltd. |
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