CN101992535A - Pipe with multiple different inner cavity shapes and manufacturing device thereof - Google Patents
Pipe with multiple different inner cavity shapes and manufacturing device thereof Download PDFInfo
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- CN101992535A CN101992535A CN2009101637196A CN200910163719A CN101992535A CN 101992535 A CN101992535 A CN 101992535A CN 2009101637196 A CN2009101637196 A CN 2009101637196A CN 200910163719 A CN200910163719 A CN 200910163719A CN 101992535 A CN101992535 A CN 101992535A
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Abstract
The invention provides an extrusion molding die mechanism which is characterized in that during the extrusion molding of a pipe, the inner cavity shape of the pipe can easily and continuously be changed along the length direction of the pipe at certain intervals, thus that the process is simplified, the equipment cost is low, and the cross section is variable.
Description
Technical field
Pipe and manufacturing installation thereof that the shape that the present invention relates to inner chamber on the length of tube direction changes at certain intervals continuously.
Background technology
In the past, existence much was the product that multistage changes a shape of managing inner chamber in the product.For example, at medical field, in the drainage tube of traumatic part treatment usefulness etc., in order to improve discharge opeing efficient and to prevent bending, indwelling portion side need have inner chamber with ribbing in vivo, in external side then is to be connected with the base part of the connector of discharge opeing bottle etc., and for reaching this situation, need make aforementioned tube form inner chamber is positive toroidal and the thicker pipe of wall ratio.
In technology in the past, for example when the pipe of the inner chamber of making inner chamber with the thin rib of band and positive toroidal, adopt following method: the pipe of the inner chamber of the pipe of the inner chamber of the thin rib of moulding band and positive toroidal respectively afterwards, is bonded together two pipes via the parts such as connector of other moulding.Therefore but in the method, not only number of components increases but also is difficult to realize the automation of operation, has to carry out the assembling procedure based on handwork, the main cost degradation that is difficult to realize product from the aspect in man-hour.In addition, the ladder difference that certainly leads at the connector place of pipe periphery often produces unfavorable condition in the use as medical pipe.
As the means that address the above problem a little, developed mold shape changeable mechanism based on crosshead mechanism, the extrusion die mechanism that the shape of inner chamber is changed continuously is practical, but need a plurality of moving parts mostly, drive division forms complicated structure again, and have to change the layout of production line sometimes, expend cost, therefore be unsuitable for the production of the medical instruments of other kinds of produced in small quantities.
Summary of the invention
The present invention finally makes through various researchs for above-mentioned these problems that solve pipe moulding in the past, can be easily in extrusion molding the shape of inner chamber is changed at certain intervals continuously realize operation is simplified and cost of equipment the is cheap variable extrusion molding in cross section with device and the pipe that uses this device manufacturing in the length of tube direction thereby its purpose is to provide a kind of.
Promptly, the present invention relates to the variable extrusion molding of cross sectional shape with device and the pipe that uses this device to make, the variable extrusion molding of described cross sectional shape is characterised in that with device, the somatotype face of inner mold (moulding product cavity shape determination section) is formed by the multi-segment structure of a plurality of different cross sectional shapes, by this inner mold front and back on the resin path direction are moved, the cavity shape of moulding product is changed.
Description of drawings
Fig. 1 illustrates the in-built cut-away sectional view of the variable extrusion molding in the cross section that becomes one embodiment of the present of invention with mould.
Fig. 2 illustrates the internal structure of the variable extrusion molding in the cross section that becomes one embodiment of the present of invention with the overflow valve of mould.It is cut-away sectional view.
Fig. 3 is the variable figure that extrudes with formed in mould pipe section in cross section that utilizes in the past.
Fig. 4 is the profile of drainage tube in the past.
Fig. 5 is other the schematic diagram of embodiment that illustrates based on mold mechanism of the present invention.
Fig. 6 is other the figure of embodiment that illustrates based on the inner mold of mold mechanism of the present invention.
Label declaration
1: movable inner mold; 2: outer mold; 3: actuator; 4: outer mold somatotype face; 5: the inner mold retainer; 6: die head; 7: the inner mold front portion; 8: the inner mold rear portion; 9: by the anterior tube shape example 1 that forms of inner mold; 10: the tube shape example 1 that forms by the inner mold rear portion; 11: movable inner mold example 1; 12: by the anterior tube shape example 2 that forms of inner mold; 13: the tube shape example 2 that forms by the inner mold rear portion; 14: movable inner mold example 2; 15: by the anterior tube shape example 3 that forms of inner mold; 16: the tube shape example 3 that forms by the inner mold rear portion; 17: movable inner mold example 3; 21: overflow valve; 22: inner mold; 23: outer mold; 24: actuator; 25: mould; 26: extruder; 27: the resin stream; 28: needle-valve; 29: motor.
The specific embodiment
Below, the present invention is described in detail to use accompanying drawing.Accompanying drawing is to illustrate based on the synoptic diagram of the variable extrusion molding of cross sectional shape of the present invention with an embodiment of mold mechanism, and Fig. 1 is that moulding product inner chamber is the synoptic diagram of the variable extrusion molding of cross sectional shape of shape with ribbing and positive toroidal with mold mechanism.Fig. 2 is the synoptic diagram of the movable inner mold (1) of this mechanism.Fig. 3 is figure and the moulding product cutaway view that the position of the movable inner mold (1) of this mechanism when managing moulding concerns, (a) is the position relation when utilizing inner mold front portion (7) to carry out moulding, (b) is the section shape of the moulding product of this moment.(c) be position relation when utilizing inner mold rear portion (8) to carry out moulding, the section shape of the moulding product of this moment (d) is shown.Fig. 4 is the figure of embodiment that the shape of the moulding product that can utilize mechanism of the present invention moulding and movable inner mold is shown.
As shown in Figure 1, the variable extrusion molding mold mechanism in cross section of the present invention, can move by making the inner mold front and back in the resin stream and on the resin path direction that in common tube extrusion molding, are fixed, thereby the cross sectional shape of the inner chamber of pipe is changed.
Movable part only is movable inner mold (1), and outer mold (2) is fixed basically.The parts that the actuator (3) that makes movable inner mold (1) action is advanced and retreat before and after being for example can be cylinders.The position that actuator (3) is set is and the coaxial rear of movable inner mold (1) basically, if then the easiest assembling of crosshead.And, owing to be the few mechanism of resistance that moving part is subjected to from resin, therefore the driving force of small-sized actuator (3) is just enough, under the situation of the moulding layout of for example common lateral traction formula beyond crosshead, small-sized actuator (3) can be imbedded in the resin stream, whatsoever the extruder of sample can both easily be tackled.
Movable inner mold (1) is provided with the different part in cross section of the quantity that the cross sectional shape of desiring to make inner chamber changes, as shown in Figure 2, desiring to make under the situation of cross sectional shape with two sections variations of inner chamber, desired cross sectional shape is set in inner mold front portion (7) and inner mold rear portion (8).When desiring cross sectional shape is changed, on the resin path direction, move the moulding of carrying out desired cross sectional shape by making movable inner mold (1).
The position relation of the mould during for moulding, shown in Fig. 3 (a), carry out under the situation of moulding at the cross sectional shape that utilizes inner mold front portion (7), make inner mold front portion (7) move to outer mold somatotype face (4), shown in Fig. 3 (c), carry out under the situation of moulding in the shape of utilizing inner mold rear portion (8), make inner mold rear portion (8) move to outer mold somatotype face (4).The cross sectional shape of each moulding product is shown in Fig. 3 (b), (d).Shown in Fig. 3 (c), when utilizing inner mold rear portion (8) to carry out moulding, form inner mold front portion (7) from the outstanding shape of the outer surface of outer mold (2), therefore, be preferably, about the length of inner mold front portion (7), the die joint length that consideration can moulding and form necessary bottom line.
If medical pipe, then manage the scope that diameter is 1～30mm, therefore the length of expecting outer mold somatotype face (4) in 2～30mm, and the length of expectation inner mold front portion (7) and inner mold rear portion (8) also the length with outer mold somatotype face (4) is identical.In the extrusion molding in the horizontal direction, worry that the front end of inner mold front portion (7) contacts with the inner chamber of moulding product, thus most preferably the cross section be changed to two sections.Under the front end of worrying inner mold front portion (7) and situation that the inner chamber of moulding product contacts, also can be with the contraction in length of inner mold front portion (7) length to 7/10ths degree of the length of outer mold somatotype face (4), and also be effective.Utilizing crosshead under the situation that vertical direction is extruded, though can make into multistage changes, but owing to worry that the front end of inner mold front portion (7) contacts with the inner chamber of moulding product and also have restriction on the layout of make-up machine, therefore 2～3 sections is proper.
The cross sectional shape of inner mold front portion (7) and inner mold rear portion (8) is respectively a shape arbitrarily, without any problem, in mechanism of the present invention, example as shown in Fig. 4 (a) and (b), (c), so long as the shape of inner mold front portion (7) all is fully by the shape of bag in the shape of inner mold rear portion (8) from any aspect of area, position, no matter be which kind of cross sectional shape can both carry out the variable extrusion molding of cross sectional shape then.
And, in order to extrude the pipe of sectional area interim ground conversion, though there is following technology, promptly, by making inner mold (1) move integrated technology with before and after some cycles is in resin stream (18) and on the resin path direction, but in this mechanism since the aperture area of the resin exit portion of mould front end change, therefore under the situation of screw rod with the certain speed rotation, the resin pressure that the variable mold for forming in cross section is subjected to periodically changes.The extruded velocity of the resin of extruding thus changes, but because hauling speed is certain, so pipe is stretched in the presulfurization stove, thus the local external diameter chap that the little local external diameter of sectional area attenuates, sectional area is big.In addition, make pipe loosely under the situation by the presulfurization stove, the discharge rate of extruding in the big place of sectional area does not catch up with and might cause external diameter to attenuate.
In order to address this problem, the present invention is provided with the device of the amount of resin of overflowing being controlled according to the variation of the sectional area between outer mold and the inner mold midway the resin stream.Shown in Fig. 5, Fig. 6 is the embodiment of device that amount of resin is controlled.As shown in Figure 5, by with moving of inner mold (22) resin overflow valve (21) being opened and closed, the resin pressure that can alleviate in the resin stream (27) changes.
The resin overflow valve is arranged on the resin stream midway, it is the such mechanism of the needle-valve shown in the image pattern 6 (28), though exist utilize motor (29) thus wait the method etc. that makes the valve rotation change the method for aperture area or utilize the parts switching of magnetic valve and so on, but, there is no particular determination so long as can get final product according to the structure that sectional area is controlled the amount of resin of overflowing and resin can not be trapped in valve portion.
Though the amount that resin is overflowed is a discharge rate according to the resin that flows out from wire guiding nipple (dice) front end to be changed when variable in the cross section and how much decides, but under the situation of the state that the generation resin does not overflow, resin solidifies at valve portion, thereby the possibility that the function that has switching can't be worked swimmingly, therefore preferably form all the time from the overfolw hole of resin and flow out state of resin, preferably determine minimum flow, make it overflow the amount of Duoing slightly than the variable quantity of sectional area.
Even utilizing this resin to overflow mechanism controls, extrude with the resin pressure in the mould and also can change, from also some variation slightly of extruded velocity that wire guiding nipple flows out, still because hauling speed is certain all the time, so pipe is stretched, changing also appears in its external diameter when relaxing.In order to improve this situation, it is poor further to improve external diameter by following gimmick, promptly; Come out to from outer mold (23) at pipe and to utilize sensor senses lax between the hauling machine, so that the lax method that does not change hauling speed with changing, perhaps synchronous by the action that makes inner mold and overflow valve (21), and the gimmick that hauling speed is controlled.
As mentioned above, if use the variable extrusion molding mold mechanism of cross sectional shape of the present invention, in extrusion molding, the shape of inner chamber is changed at certain intervals continuously, thereby realize that operation is simplified and cost of equipment is cheap, the present invention is exceedingly useful to this.
In addition, the stream by will being located at resin according to the device that the variation of the sectional area between outer mold and the inner mold is controlled the amount of resin of overflowing can also provide outside dimension stable pipe midway.
Claims (5)
1. the manufacturing installation of a pipe is characterized in that,
The somatotype face of inner mold (moulding product cavity shape determination section) is formed by the multi-segment structure of a plurality of different cross section shapes, moves by making this inner mold front and back on the resin path direction, and the cavity shape of moulding product is changed.
2. the manufacturing installation of pipe according to claim 1 is characterized in that,
Be included in shape in the cross sectional shape of rear end side of inner mold at the cross sectional shape that the inner mold somatotype face that the two-stage structure by the different cross section shape forms forms the front of inner mold.
3. the manufacturing installation of pipe according to claim 1 and 2 is characterized in that,
The cross sectional shape of described moulding product comprises shape with ribbing, positive toroidal, semicircle shape or has two or more at least in the shape of a plurality of inner chambers.
4. according to the manufacturing installation of each the described pipe in the claim 1 to 3, it is characterized in that,
Setting midway at the stream of resin: according to the variation of the sectional area between outer mold and the described inner mold to overflowing the device that amount of resin is controlled.
5. a medical pipe is characterized in that,
Described medical pipe be with utilize claim 1 to 4 pipe manufacturing installation and the moulding product of moulding are used for the special shape pipe of medical application.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101637196A CN101992535A (en) | 2009-08-14 | 2009-08-14 | Pipe with multiple different inner cavity shapes and manufacturing device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101637196A CN101992535A (en) | 2009-08-14 | 2009-08-14 | Pipe with multiple different inner cavity shapes and manufacturing device thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101992535A true CN101992535A (en) | 2011-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101637196A Pending CN101992535A (en) | 2009-08-14 | 2009-08-14 | Pipe with multiple different inner cavity shapes and manufacturing device thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111716679A (en) * | 2019-03-20 | 2020-09-29 | 诺信公司 | Die assembly and granulation device with pressure regulating device |
| CN114770871A (en) * | 2022-05-18 | 2022-07-22 | 惠州市利柯达塑胶模具有限公司 | High-efficient deep hole board injection mold |
| CN115782031A (en) * | 2023-02-09 | 2023-03-14 | 浙江建华集团盛太塑料有限公司 | Pearl cotton production equipment and process |
-
2009
- 2009-08-14 CN CN2009101637196A patent/CN101992535A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111716679A (en) * | 2019-03-20 | 2020-09-29 | 诺信公司 | Die assembly and granulation device with pressure regulating device |
| US11858176B2 (en) | 2019-03-20 | 2024-01-02 | Nordson Corporation | Die assembly with pressure regulating device, and a pelletizing apparatus |
| CN114770871A (en) * | 2022-05-18 | 2022-07-22 | 惠州市利柯达塑胶模具有限公司 | High-efficient deep hole board injection mold |
| CN114770871B (en) * | 2022-05-18 | 2024-02-09 | 惠州市利柯达塑胶模具有限公司 | High-efficient deep hole board injection mold |
| CN115782031A (en) * | 2023-02-09 | 2023-03-14 | 浙江建华集团盛太塑料有限公司 | Pearl cotton production equipment and process |
| CN115782031B (en) * | 2023-02-09 | 2023-04-25 | 浙江建华集团盛太塑料有限公司 | Pearl cotton production equipment and process thereof |
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Application publication date: 20110330 |