CN1523321A

CN1523321A - Method and apparatus for analyzing separation between spacedsurfaces using magnetic field intensity measurements

Info

Publication number: CN1523321A
Application number: CNA03122038XA
Authority: CN
Inventors: ��¡�A��A��³��; 曼夫瑞德·A·A·鲁波克; A3; 斯蒂芬·A·鲁波克
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-02-21
Filing date: 2003-04-22
Publication date: 2004-08-25
Anticipated expiration: 2023-04-22
Also published as: CA2419500C; CA2419500A1; CN2632628Y; CN1262813C

Abstract

A method of analyzing spacing between two separated surfaces which has particular applicability for use in centering of die tooling within a mold tunnel of a plastic pipe molding apparatus is achieved by setting up a magnetic force which spans both surfaces between the spacing and then measuring intensity of the magnetic force to indicate extensive separation between the surfaces.

Description

Utilize method and apparatus at interval between the magnetic-field measurement interpretation of result release surface

Technical field

The present invention relates to a kind of method of measuring distance between two surfaces, and be specially adapted to measure the tube wall channel width in the plastic tube compression moulding equipment, so that in described equipment, determine consistance in the described pipe fitting of formation around tube wall thickness.

Background technology

When being subjected to hindering near any surface in two surfaces, measure the distance between two surfaces or be at interval very the difficulty.For example, surround the first housing fully at the second housing and stop under the situation near the first housing, be difficult to measure the distance between the inside surface of the outside surface of the first housing and the second housing.

For example, a kind of plastic tube compression moulding equipment comprises inner mould, described mould by the spacing that forms tube wall channel with one around the molded channel separation of motion.The molded passage of motion that is longer than mould is easy to hinder Measurement die and the interval between the molded passage of tube wall channel.If can obtain this measurement result, so described measurement result is to determining that the centering of mould in molded passage then is very favorable.This centering can be set the thickness of the tube wall of the plastic tube that forms in the equipment of being centered around.

Consider the difficulty that in the internal measurement that carries out plastic tube compression moulding equipment, is run into, the present practice is: by cutting off pipe fitting behind molded passage release plumbing component, pipe thickness with the opposing connection tube wall is carried out actual measurement, determines the consistance around the wall thickness of tube wall thus.If the consistance that the measurement result of gained demonstrates around the wall thickness of tube wall can not receive, should regulate subsequently so that utilize the result of these adjustings of determining once more by cut-out and wall-thickness measurement, realize the centering of mould in molded passage better.This method of testing is very time-consuming, so cost is higher.

Summary of the invention

The invention provides a kind of method of determining or analyzing distance between two release surfaces, the present invention is specially adapted to determine and needn't cuts off tube wall just can be determined the tube wall that forms in the plastic tube extrusion apparatus the conforming method of wall thickness with physics mode.

On the basis of unusual broad sense, according to the present invention, the method for determining distance between two release surfaces comprises and forms the magnetic force that strides across two surfaces, and measures the magnetism intensity of spacing value between the described surface of expression subsequently.

According to an aspect of the present invention, it provides a kind of method that is used for analyzing this pipe fitting tube wall when the plastic tube extrusion apparatus forms plastic pipe, and described plastic tube extrusion apparatus has by a tube wall channel and the mould around molded channel separation.Described method is included in different test points place around tube wall channel, forms many magnetic force between the inner surface area of the outer surface region of mould and molded passage.Subsequently, measure to determine the intensity of each magnetic force, so that produce the channel width measurement result at each test point place.Subsequently, the channel width measurement result of different test points is done mutually relatively, to determine consistance around the wall thickness of tube wall.

If wish to make the pipe fitting that has uniform thickness around tube wall, then reply equipment is regulated until the measurement result of channel width all identical at all different test points places.

Can also when not using, equipment analyze the location of mould in molded passage.In this case, when the plastic flow passage is empty, promptly when not forming pipe fitting, can test around the plastic flow passage.But, the indication that described analysis still can provide any pipe fitting of forming in the equipment of being presented at whether to have constant wall thickness.

Description of drawings

Below, according to most preferred embodiment of the present invention, above-mentioned and other advantage and characteristics of the present invention are described in more detail, wherein:

Fig. 1 is the skeleton view of the plastic tube extrusion apparatus of a most preferred embodiment of the present invention, and described equipment is equipped with the tube wall channel width of measuring device;

Fig. 2 is the sectional view by equipment among Fig. 1;

Fig. 3 is for passing through the amplification profile of the molded areas of equipment among Fig. 1;

Fig. 4 has shown an independent measurement position, and it is used for the mould of survey sheet 1 equipment and the distance between the molded conduit wall, to determine the wall thickness at the tube wall of test point place formation;

Fig. 5 is the skeleton view of parts of measuring position among Fig. 4;

Fig. 6 is the side view at the measurement component shown in Fig. 5;

Fig. 7 is the side view of the measuring position of another preferred embodiment of the present invention;

Fig. 8 is the zoomed-in view in the measuring position shown in Fig. 7;

Fig. 9 is the sectional view by molded passage among Fig. 3, and described molded passage has a plurality of test points and has not mould with molded passage centering;

Figure 10 is similar to Fig. 9, is utilizing test point equipment to be regulated with by utilizing the view after different test points makes mould and molded passage coupling.

Embodiment

Fig. 1 has shown a kind of usually plastic tube extrusion apparatus shown in 1.This equipment is equipped with the plastic extruders 3 that can send into usually the molded passage shown in 5.Molded passage is the zone of formed or molded plastic tube.

Fig. 2 and 3 has shown usually the mould shown in 15, and its plastics that are used for the machine of self compaction in the future 3 are sent in the molded passage 5.Molded passage self is formed by the module 19 of motion, and these modules are outwards around mould 15.Mould 27 separates with module at certain intervals, and described interval 27 forms a tube wall channel make pipe fitting in equipment during.

As shown in Figure 3,27 winding mold tools 15 are not constant at interval.Therefore, mould is correct centering not, promptly can not be positioned at by around the center of the molded passage that forms of module.

The downstream end of mould 15 comprises cooling plug 17 known in the art.Plastics from extruder 3 are pasting the outside surface of the inner surface movement of module 19 by mould 15, and are cooled off by cooling plug 17 during pushing.

Cooling plug 17 is provided with a plurality of measurement mechanisms, and these devices are used for the spacing between definite mould and the molded channel inner surface.Or when described equipment is not worked when no plastics (in passage 27), or when equipment work and stream of plastic are crossed gap 27, all can install by these, device 31 as shown in FIG. 4 obtains measurement results.Under latter event, measurement mechanism not only is used for the centering of Measurement die at molded passage, and can also form the wall thickness of determining pipe fitting in the pipe fitting in equipment.

See Fig. 4～6 for details, can see that each module 19 all has usually at the special-shaped inside surface shown in 21.This surface is included in a series of projectioies 25 by groove 23 intervals on the module faces.Spacing between projection 25 and mould has been determined the wall thickness of the tube wall that forms between mould and module faces.

Though in Fig. 4, shown the equipment that is used to make a kind of special-shaped wall pipe fitting (being formula with ribbing or double-wall corrugated pipe), but, described equipment equally also can form a kind of simple planomural pipe fitting, and in this case, each module all has smooth rather than special-shaped surface.

What should emphasize is: make the cooling plug 17 with loop configuration be positioned at the center of ring mould 15, this ring mould 15 is arranged in the annular molded passage that is formed by module 19.Therefore, the cooling plug is easy to produce eccentric situation identical with the mould upstream portion, that may occur in molded passage, and can be used for the installing and locating of proving installation, and described proving installation is used for the location of Measurement die in molded passage.

Fig. 4～6 shown a kind of be based upon a fc-specific test FC position on cooling plug 17 ends, the special test device shown in 31 usually.Proving installation 31 comprises an installation bracket 33, and it has supported a magnet 35 and a force cell 37.Magnet 35 can produce the gap between the mould inner surface that strides across cooling plug and formed by module 19 or the magnetic field of spacing 27.The projection 25 of these modules, particularly module is equipped with metal insert, as in the back with the insert among the Fig. 8 that describes in detail.Therefore, the magnetic field that produces by magnet 35 can produce magnet and can not the metal insert of relative motion in the module surface between attraction.But, allow magnet 35 to do less motion, this motion produces load because the attraction between magnet and the module surface can make magnet movement be resisted against on the force cell 37 and on force cell 37.The load that magnet acts on the described force cell directly depends on the magnetic field intensity that strides across gap or spacing 27.Therefore, spacing is widened, and the load that acts on the force cell can reduce, and pitch smaller, the load that acts on the force cell then can increase.

Fig. 9 and 10 has shown and is setting up a plurality of proving installations 31 around the different test points of the tube wall channel in the molding equipment.In these test points each includes its oneself magnetic field, and from each test point the test result of difference is delivered to the common backbone that an energy contrasts all measurement results mutually by lead 39.If greater than the magnetic field intensity of another place's test point, there is less clearance in the magnetic field intensity of a test point so between mould and the molded passage at high strength test point place more.Indication so just can be provided clearly, and it is uneven around the thickness of pipe fitting that center and the tube wall that mould is not arranged on molded passage is shown.

Can see in Fig. 9: mould obviously is eccentric with respect to the molded passage that is formed by module, thus in Figure 10, carried out adjusting so that mould with respect to molded passage centering.Therefore, the spacer ring between mould and the module is uniform around described gap in Figure 10.In order to make the scheme of Figure 10, should regulate until the magnetic force at each test point place is balanced each other.After the position of Figure 10 being regulated, the tube wall that forms in described wall passage has the constant or homogeneous thickness around tube wall.

As top emphasizing, when not having plastics or during the formation of tube wall, all can measure by molded passage.If measure in equipment work, the magnetic force at each test point place all can see through tube wall and can regulate in equipment operation so.

Referring to accompanying drawing 1, can see that the equipment body that is independent of mould is installed on the adjuster bar 9, described adjuster bar allows with respect to mould the equipment that comprises molded passage component vertically to be regulated.In addition, the base 7 of equipment also is adjustable on the bottom bearing member (not shown), with the direction conditioning equipment of permission along arrow 11, thereby can fully regulate equipment, so that realization equipment is with respect to the centering of mould.

Can also regulate mould self, so that mould can be with respect to molded passage centering.

In above description, make the magnet at each test point place all be positioned at cooling beyond the Great Wall, and described force cell is arranged between the metal insert of magnet and module faces.Fig. 7 and 8 has shown further improvement structure.

More particularly shown in Fig. 7 and 8, a test point 51 that is used to measure magnetic force comprises a carriage 53 that is installed on the cooling plug 10.This bearing bracket has a force cell 59 and a magnet 57.Should note: opposite with the embodiment of front, magnet 57 is between force cell and measured described gap, and in the embodiment of described front, force cell is between magnet and measured gap.

Fig. 8 has shown that module 19 is provided with insert 61 in the module projection.Fig. 8 has also shown the form of the double-wall corrugated pipe of the wall passage 27 that is filled between mold walls and the mould.

In this specified scheme, magnet 57 is by pulling in the magnetic force at module insert 61 places or magnetic field suction rather than promote force cell 59.Consistent with embodiment in front, the load that is influenced force cell or pulling magnet 57 by magnetic force can provide the measurement result of indicating or interval between mould and the mold walls being described.

What also should emphasize in addition is: can make further improvement to described scheme.For example, can utilize different inserts (as, be subjected to the stronger bigger metal insert that influences of magnetic force) replace high spot in module by the fixing insert 61 of slip locking part.As the selectable scheme of another kind, insert 61 itself can be magnet and the polarity that depends on system, in different proving installations, can utilize insert to attract or repulsion magnet.When utilizing and at two blocks of magnet, have under the situation of the public magnetic pole of facing mutually each other at the magnet of module faces and proving installation, can be by magnet being pushed into imposed load on the force cell in the scheme shown in Figure 8.If if change scheme shown in Figure 8 magnet 59 is arranged between insert 61 and the magnet 57 and insert 61 self is the magnet that repels magnet 57, magnet 57 will spur with used load on force cell so.

As the selectable scheme of another kind, can be magnet at molded insert 61, test point is not provided with any parts except the metal insert that is subjected to be influenced by the magnetic force that insert produces simultaneously.

In the superincumbent description, proving installation is fixed to cooling beyond the Great Wall.It is to be understood that other place that also they can be arranged on the mould is so that measure.In addition, in order to make mould centering, the measurement of being taked needn't produce actual pitch at the every bit place.Only need compare the centering that (comparative) valve provides mould in different test points.

Though most preferred embodiment of the present invention is described in detail,, it will be understood by those skilled in the art that under the situation that does not break away from inventive concept or claim scope, can make improvements.

Claims

1. method of analyzing between two release surfaces at interval, described method comprises: form and pass magnetic force described interval, that stride across two surfaces, and measure the magnetism intensity of the described spaced surface value of expression.

2. one kind is used for the method that definite first housing is located in the second housing, wherein, the described second housing is around the first housing, between first and second bodies, have simultaneously at interval, described method is included in a test point place and forms magnetic force, at described test point place, described magnetic force passes described interval, strides across the outer surface region of the first housing and the inner surface area of the second housing, and measure magnetism intensity, the outer surface region of its expression first housing and the spacing value between the second housing inner surface area at the test point place.

3. the method for the location of first and second bodies that are used to determine to have respective shapes, wherein, the first housing by the second housing around, between two bodies, have simultaneously at interval, described method comprises: form a plurality of magnetic force at a plurality of different test point places, the diverse location place in the interval of magnetic force between described body at different test points place strides across the outer surface region of the first housing and the inner surface area of the second housing.

4. method according to claim 3, wherein: the first housing comprises the annular element of the mould of plastic pipe molding equipment, the second housing comprises an outside ring mould around described annular element, and the interval between the described body comprises a tube wall channel.

5. method according to claim 4, it comprises: make a body movement in the body, be balanced against others until the magnetic force at different test points place, to guarantee the centering location of annular element in ring mould.

6. method according to claim 5, it comprises: make the annular element motion, be balanced against others until the magnetic force at different test points place.

7. method according to claim 5, it comprises: make the ring mould motion, be balanced against others until the magnetic force at different test points place, to guarantee the centering location of annular element in ring mould.

8. method according to claim 4, wherein: by making one first measuring piece be arranged on mould inner surface zone and by making one second measuring piece be positioned at the annular element place, be formed on the magnetic force at each test point place, a measuring piece in first and second measuring pieces be for can producing the magnetic part in the magnetic field that described magnetic force is provided, and another measuring piece in first and second measuring pieces is the metalwork that is subjected to the influence of magnetic field that produced by magnetic part.

9. method according to claim 8, it is included in the force cell at each test point place, and described second measuring piece is movable parts, producing load on force cell, it is illustrated in each test point place to these parts by Movement in Magnetic Field, at interval value between the outside surface of annular element and mould inner surface.

10. method according to claim 9, wherein: make force cell between first and second measuring pieces, and spur second measuring piece at the force cell place, to make loading on force cell at each test point place by magnetic field.

11. method according to claim 9, wherein: make second measuring piece between the force cell and first measuring piece and at the first measuring piece place, by magnetic field suction second measuring piece, so that the pulling and at each test point place, used load on force cell.

12. one kind in pipe fitting compression moulding equipment, be shaped in the method for analyzing plastics tube wall, wherein, described pipe fitting compression moulding equipment have by tube wall channel with around the mould of molded channel separation, described method comprises: at a plurality of different test points place around tube wall channel, between the inner surface area of the outer surface region of mould and die channel, form a plurality of magnetic force, the intensity of measuring each magnetic force to be forming the channel width measurement result at each test point place, and the channel measurement width result of more different test points is with the consistance of definite wall thickness around tube wall.