CN113977911B - Mould calibrating method for cable extruder head - Google Patents
Mould calibrating method for cable extruder head Download PDFInfo
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- CN113977911B CN113977911B CN202111238474.6A CN202111238474A CN113977911B CN 113977911 B CN113977911 B CN 113977911B CN 202111238474 A CN202111238474 A CN 202111238474A CN 113977911 B CN113977911 B CN 113977911B
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- ring
- die sleeve
- calibrating
- flange
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/302—Extrusion nozzles or dies being adjustable, i.e. having adjustable exit sections
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3462—Cables
Abstract
The die calibrating method of the cable extruder head comprises the steps of adjusting the radial relative positions of a die core and a die sleeve until axes of the die core and the die sleeve are collinear; the method for adjusting the radial relative position of the mold core and the mold sleeve is fixed and fine-tuning. A set of adjusting mechanism is newly designed, and the adjustment-free and radial micro-adjustment can be used on the same adjusting mechanism in a switching way; the design method comprises the following steps: 1) Selecting whether the radial fine tuning object is a mold core or a mold sleeve; 2) Selecting the position of a radial fine adjustment mechanism of the die sleeve; 3) Designing a radial fine adjustment mechanism; 4) Designing an adjustment-free mechanism; 5) Designing a switching mechanism of the adjustment-free mechanism and the radial fine adjustment mechanism; 6) And switching between the adjustment-free mechanism and the radial fine adjustment mechanism. The method can switch the adjustment-free and fine adjustment mode by rotating the die calibrating ring so as to be suitable for different production requirements.
Description
Technical Field
The invention relates to a machine head of an extruder, in particular to a die calibrating method of a cable extruder head.
Background
At present, the concentric degree matching between the mould core and the mould sleeve of the cable extruder head is generally in a fine adjustment mode and a free adjustment mode.
The common fine tuning machine head changes the concentric degree matching of the mold core and the mold sleeve by adjusting radial mold calibrating screws, so as to adjust the structure of the cable extrusion skin. The method has higher operation requirements, more waste products are generated in the adjustment process, and the production efficiency is influenced. In a common adjustment-free machine head, the die sleeve and the die sleeve are fixed on the extruder head, and the positions of the die sleeve and the die sleeve are relatively fixed, so that die correction is not needed. However, the machine head has higher requirements on processing and installation, has high maintenance requirements on the machine head, and has greatly shortened service life compared with the machine head.
Disclosure of Invention
The invention provides a die calibrating method of a cable extruder head and the cable extruder head, which overcome the defects in the prior art, and can effectively change the die calibrating mode of the cable extruder head according to the needs. The figures are as follows:
the die calibrating method of the cable extruder head comprises the steps of adjusting the radial relative positions of a die core and a die sleeve until axes of the die core and the die sleeve are collinear; the method for adjusting the radial relative position of the mold core and the mold sleeve is fixed and fine-tuning. Designing a set of adjusting mechanism, and switchably using adjustment-free and radial micro-adjustment on the same set of adjusting mechanism; the design method comprises the following steps:
1) The selected radial fine tuning object is a mold core or a mold sleeve:
because the mold core is connected to the axis position of the extruder head, the structural interference generated by the radial position change of the mold core comprises a housing of the extruder head, a glue guide and a glue running channel;
the die sleeve is connected in the shell of the extruder head through a die sleeve flange, and the structural interference of the radial position of the die sleeve is limited to the die sleeve flange;
then the die sleeve is selected to be subjected to radial fine adjustment;
2) Selecting the position of a die sleeve radial fine adjustment mechanism:
the die sleeve is a high-precision piece, and the structure of the die sleeve is fixed; the die sleeve and the die sleeve flange are relatively fixed, and the radial fine adjustment of the die sleeve is realized through the radial fine adjustment of the die sleeve flange, so that the radial relative position of the die core and the die sleeve is adjusted;
3) Radial fine adjustment mechanism is designed:
design principle: the circle center deviation degree of the inner ring and the outer ring is adjusted in a mode of adjusting the approach degree of the outer edge of the inner ring and the inner edge of the outer ring in a structure mode of clearance fit of the inner ring and the outer ring;
the structure is realized: a cylindrical die sleeve flange is sleeved with a cylindrical die calibrating ring, and a gap is reserved between the inner wall of the die calibrating ring and the outer wall of the die sleeve flange; the side wall of the die calibrating ring is penetrated with a plurality of axisymmetric screw holes, and the screw holes are internally screwed with calibrating screws; the distance between each calibration screw and the axis of the die calibrating ring is adjusted, so that the die sleeve flange is driven, and the degree that the axis of the die sleeve flange deviates from the axis of the die calibrating ring is adjusted;
4) And (3) designing an adjustment-free mechanism:
design principle: the inner ring and the outer ring are fixed in a structure form of close fit of the inner ring and the outer ring, and the circle centers of the inner ring and the outer ring are overlapped;
the structure is realized: a cylindrical die sleeve flange is sleeved with a cylindrical die calibrating ring, and the inner wall of the die calibrating ring is closely attached to the outer wall of the die sleeve flange; the adjustment-free die sleeve is realized by fixing the relative positions of the die sleeve flange/the die calibrating ring and the die core;
5) And a switching mechanism of the adjustment-free mechanism and the radial fine adjustment mechanism is designed:
design principle: in the form of a close fit structure of an inner ring and an outer ring, the outer diameter of part of the inner ring is respectively reduced, and the inner diameter of part of the outer ring is enlarged; the enlarged portion of the outer ring is sufficient to accommodate the un-narrowed portion of the inner ring;
rotating the outer ring to enable unchanged parts of the inner ring and the outer ring to be closely attached to each other, and in the state, the circle centers of the inner ring and the outer ring are coincident;
rotating the outer ring to make the un-contracted part of the inner ring correspond to the expanded part of the outer ring, so that the inner ring is not limited by the outer ring in the state, and the position of the inner ring is adjustable;
the structure is realized: the outer diameter of the die sleeve flange is smaller than the outer diameter of the die calibrating ring;
a plurality of axisymmetric inner bosses which face the axis of the inner boss are arranged on the inner wall of the die calibrating ring,
the outer wall of the die sleeve flange is provided with a plurality of axisymmetric outer bosses which are opposite to the axis of the die sleeve flange;
the cylindrical surface where the top surface of each inner boss is positioned and the cylindrical surface where the bottom surface of each outer boss is positioned are the same cylindrical surface;
the side wall of the die calibrating ring is provided with a plurality of screw holes, and die calibrating screws are screwed in the screw holes; each screw hole is symmetrical around the axis of the die calibrating ring, and the screw hole is positioned between two adjacent inner bosses; the space between two adjacent inner bosses is enough to accommodate one outer boss;
6) Switching between the adjustment-free mechanism and the radial fine adjustment mechanism:
the design principle of the step 5) is as follows:
rotating the die calibrating ring to enable the positions of the inner boss and the outer boss to correspond to each other, and attaching the top surfaces and the bottom surfaces of the inner boss and the outer boss to form an adjustment-free mechanism;
and the die calibrating ring is rotated to enable the position of the outer boss to correspond to the space position between the two inner bosses, and a radial fine adjustment mechanism is formed at the moment.
Further, in the step 5), the pattern surrounded by the outer edge of the inner ring and the pattern surrounded by the inner edge of the outer ring are similar patterns.
The cable extruder head with the mode-correcting mode being switched, which is matched with the method, comprises the following components: the plastic mould comprises a shell, a connecting flange, a plastic guide, a mould core, a mould sleeve combining cap and a mould sleeve flange;
the inside of the shell is provided with a cavity penetrating front and back;
the side wall of the shell is provided with a through hole as a side wall fluid channel; the connecting flange is connected to the side wall of the shell, the flange fluid channel at the hollow position of the connecting flange is communicated with the side wall fluid channel, and the side wall fluid channel is communicated with the cavity in the shell;
the glue guide extends into the shell from the rear part of the cavity in the shell, and the outer wall of the glue guide is closely adhered to the inner wall of the cavity; the outer wall of the glue guide is provided with a groove, and the inner wall of the cavity encloses a glue guide fluid channel; one end of the fluid channel of the glue guide is communicated with the fluid channel of the side wall;
the mold core is connected to the front end of the glue guide and extends out of the cavity of the shell from inside to outside;
the die sleeve is sleeved at the rear part in the hollow of the cylindrical die sleeve flange, the die sleeve is sleeved at the front part in the hollow of the die sleeve flange, and the die sleeve is fastened in the hollow of the die sleeve flange by the die sleeve and the die cap; the die sleeve flange is connected with the shell, and a die sleeve flange fluid channel is formed by surrounding the die sleeve flange and the outer wall of the front end of the glue guide; the die sleeve is sleeved outside the die core, and the die sleeve and the die core enclose a die sleeve fluid channel; two ends of the die sleeve flange fluid channel are respectively communicated with the rubber guider fluid channel and the die sleeve fluid channel;
the wiring channel of the cable extruder head penetrates through the glue guide, the mold core, the mold sleeve and the mold sleeve cap; the axis of the wiring channel is overlapped with the straight line.
The die calibrating device also comprises a cylindrical die calibrating ring; the die calibrating ring and the die sleeve flange form a die calibrating mechanism;
the axis d of the die sleeve flange is parallel or coincident with the straight line l, and the inner wall of the die sleeve flange is provided with a die sleeve connecting mechanism and a die sleeve cap connecting mechanism; the die sleeve flange is provided with a die head connecting structure for connecting the extrusion die head, and the die head connecting structure is provided with a radial fine adjustment space;
the axis of the die calibrating ring is overlapped with a straight line I, and a limiting mechanism for radially limiting the die calibrating ring to the extruder head is arranged at the rear part of the die calibrating ring;
the inner diameter of the die calibrating ring corresponds to the outer diameter of the die sleeve flange; the die sleeve flange penetrates through the hollow of the die calibrating ring from front to back; the relative positions of the die calibrating ring and the die sleeve flange are circumferentially adjustable;
the inner wall of the die calibrating ring is provided with a plurality of inner bosses facing the straight line l, and the outer wall of the die sleeve flange is provided with a plurality of outer bosses facing away from the axis d;
each inner boss is symmetrical around a straight line l, and the cylindrical surface where the top surface of each inner boss is positioned is a surface a; each outer boss is symmetrical around an axis d, and the cylindrical surface where the bottom surface of each outer boss is positioned is also a surface a;
the side wall of the die calibrating ring is provided with a plurality of screw holes, and die calibrating screws are screwed in the screw holes; each screw hole is symmetrical around a straight line l, and the screw holes are positioned between two adjacent inner bosses; the space between two adjacent inner bosses is sufficient to accommodate one outer boss.
Preferably: on the radial section, the pattern surrounded by the inner wall of the die calibrating ring and the pattern surrounded by the inner wall of the die sleeve flange are similar patterns.
The distance between the surface a and the bottom of the position between two adjacent inner bosses is 1-5 mm; the distance between the surface a and the top of the position between two adjacent outer bosses is 1-5 mm. That is, in the ideal case, the axis d of the die sleeve flange is deviated from the straight line l by ±1 to ±5mm.
Further:
the rear end face of the die calibrating ring is connected with an annular step, the axis of the annular step coincides with a straight line I, and the inner diameter of the annular step is larger than that of the die calibrating ring; the annular step forms a limiting mechanism radially limited on the extruder head.
The outer diameter of a circular cake-shaped flange seat used for connecting a die sleeve flange on the front end of the shell is the same as the inner diameter of the annular step, and the die calibrating ring is sleeved outside the flange seat through the annular step and is tightly matched with the annular step.
The machine head connecting structures are provided with a plurality of groups which are symmetrical around the axis d, and each group of machine head connecting structure comprises a through hole and a connecting screw in the through hole; the inner diameter of the front part of the through hole is larger than the outer diameter of the main body of the connecting screw, and the inner diameter of the rear part of the through hole is larger than the outer diameter of the screw head of the connecting screw; the clearance between the through hole and the connecting screw forms a radial fine adjustment space. The connecting screw passes through the through hole and is connected with the flange seat on the extruder head shell.
The hollow of the die sleeve flange is divided into a front section and a rear section; the rear section of the die sleeve flange is hollow and is in a truncated cone shape corresponding to the shape of the die sleeve, and the small bottom of the truncated cone faces the rear of the die sleeve flange; the front section hollow of the die sleeve flange is cylindrical, and the inner wall of the front section hollow of the die sleeve flange is provided with an internal thread corresponding to the external thread of the die sleeve and the cap.
The outer wall of the die sleeve flange is connected with an annular convex, and the distance between the rear end face of the annular convex and the rear end face of the die sleeve flange is not greater than the distance between the front end face and the rear end face of the die calibrating ring.
The die calibrating ring is clamped between a flange seat on the extruder head shell and a die sleeve flange.
In order to be convenient to use, the outer wall of the die calibrating ring is connected with a handle; the front end face of the die calibrating ring and the outer wall of the die sleeve flange are provided with corresponding alignment marks.
During processing, the die calibrating ring and the annular steps on the die calibrating ring are of an integral structure and can be manufactured by machining an annular blank by adopting a machine tool. Likewise, the die sleeve flange and the annular outer bulge on the die sleeve flange are of an integral structure and can be manufactured by machining an annular blank by adopting a machine tool.
The rear end face of the shell is provided with an annular concave, and a plurality of counter bores for placing heaters (electric heating rods) are uniformly distributed in the annular concave; the side face of the annular concave is provided with a mounting groove for placing the heater controller, and the mounting groove is exposed out of the side wall of the shell;
the side wall of the rear part of the glue guide is connected with a limiting boss (limiting screws are screwed on the limiting boss), the side wall of the cavity in the shell is provided with a concave corresponding to the limiting boss, and the limiting boss is in the concave.
A die sleeve flange heater is wrapped on the outer wall of the die sleeve flange; a temperature measuring hole for installing a temperature sensor is formed in the die sleeve flange; the connecting flange is provided with a temperature measuring hole for installing a temperature sensor.
The method can switch the adjustment-free and fine adjustment mode by rotating the die calibrating ring so as to be suitable for different production requirements.
Drawings
FIG. 1 is a schematic illustration of the profile of a cable extruder head of the present method;
FIG. 2 is a schematic view of the circumferential cross section of the present cable extruder head of the method (handle position down is specifically shown for clarity of illustration);
FIG. 3 is a schematic view of the assembly of a cable extruder head of the present method;
FIG. 4 is a schematic radial cross-sectional view of the die-checking mechanism (fine-tuning mode);
FIG. 5 is a schematic radial cross-sectional view of the mold calibrating mechanism (stationary mode);
FIG. 6 is a schematic view of the housing (side rear view);
FIG. 7 is a schematic view of an assembly of a glue guide and a mold core;
in the figure: straight line l, axis d, die sleeve flange 1, die sleeve 2, die ring 3, inner boss 4, outer boss 5, screw hole 6, die screw 7, annular step 8, through hole 9, connecting screw 10, die sleeve cap 11, annular outer boss 12, handle 13, alignment mark 14, flange seat 15, housing 16, glue guide 17, adjusting screw 18, adjusting nut 19, limiting screw 20, connecting flange 21, temperature measuring hole 22, die sleeve flange heater 23, mold core 24, flange fluid channel 25, glue guide fluid channel 26, die sleeve flange fluid channel 27, die sleeve fluid channel 28, trace channel 29, gap 30 between face a and bottom of adjacent two inner bosses, annular indent 31, counterbore 32, mounting groove 33, indent 34, sidewall fluid channel 35, groove 36.
Detailed Description
Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the drawings are for purposes of supplementing the description of the written portion of the specification with graphics so that a person may intuitively and intuitively understand each and every technical feature and overall solution of the present invention, but should not be construed as limiting the scope of the present invention.
In the description of the invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience in describing the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
In the description of the present invention, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
The invention will now be described in further detail with reference to the drawings and examples of implementation.
The die calibrating method of the cable extruder head comprises the steps of adjusting the radial relative positions of a die core and a die sleeve until axes of the die core and the die sleeve are collinear; the method for adjusting the radial relative position of the mold core and the mold sleeve comprises fixed type and fine-tuning type;
designing a set of adjusting mechanism, and switchably using adjustment-free and radial micro-adjustment on the same set of adjusting mechanism; the design method comprises the following steps:
1) The selected radial fine tuning object is a mold core or a mold sleeve:
because the mold core is connected to the axis position of the extruder head, the structural interference generated by the radial position change of the mold core comprises a housing of the extruder head, a glue guide and a glue running channel;
the die sleeve is connected in the shell of the extruder head through a die sleeve flange, and the structural interference of the radial position of the die sleeve is limited to the die sleeve flange;
then the die sleeve is selected to be subjected to radial fine adjustment;
2) Selecting the position of a die sleeve radial fine adjustment mechanism:
the die sleeve is a high-precision piece, and the structure of the die sleeve is fixed; the die sleeve and the die sleeve flange are relatively fixed, and the radial fine adjustment of the die sleeve is realized through the radial fine adjustment of the die sleeve flange, so that the radial relative position of the die core and the die sleeve is adjusted;
3) Radial fine adjustment mechanism is designed:
design principle: the circle center deviation degree of the inner ring and the outer ring is adjusted in a mode of adjusting the approach degree of the outer edge of the inner ring and the inner edge of the outer ring in a structure mode of clearance fit of the inner ring and the outer ring;
the structure is realized: a cylindrical die sleeve flange is sleeved with a cylindrical die calibrating ring, and a gap is reserved between the inner wall of the die calibrating ring and the outer wall of the die sleeve flange; the side wall of the die calibrating ring is penetrated with a plurality of axisymmetric screw holes, and the screw holes are internally screwed with calibrating screws; the distance between each calibration screw and the axis of the die calibrating ring is adjusted, so that the die sleeve flange is driven, and the degree that the axis of the die sleeve flange deviates from the axis of the die calibrating ring is adjusted;
4) And (3) designing an adjustment-free mechanism:
design principle: the inner ring and the outer ring are fixed in a structure form of close fit of the inner ring and the outer ring, and the circle centers of the inner ring and the outer ring are overlapped;
the structure is realized: a cylindrical die sleeve flange is sleeved with a cylindrical die calibrating ring, and the inner wall of the die calibrating ring is closely attached to the outer wall of the die sleeve flange; the adjustment-free die sleeve is realized by fixing the relative positions of the die sleeve flange/the die calibrating ring and the die core;
5) And a switching mechanism of the adjustment-free mechanism and the radial fine adjustment mechanism is designed:
design principle: in the form of a close fit structure of an inner ring and an outer ring, the outer diameter of part of the inner ring is respectively reduced, and the inner diameter of part of the outer ring is enlarged; the enlarged portion of the outer ring is sufficient to accommodate the un-narrowed portion of the inner ring;
rotating the outer ring to enable unchanged parts of the inner ring and the outer ring to be closely attached to each other, and in the state, the circle centers of the inner ring and the outer ring are coincident;
rotating the outer ring to make the un-contracted part of the inner ring correspond to the expanded part of the outer ring, so that the inner ring is not limited by the outer ring in the state, and the position of the inner ring is adjustable;
the structure is realized: the outer diameter of the die sleeve flange is smaller than the outer diameter of the die calibrating ring;
a plurality of axisymmetric inner bosses which face the axis of the inner boss are arranged on the inner wall of the die calibrating ring,
the outer wall of the die sleeve flange is provided with a plurality of axisymmetric outer bosses which are opposite to the axis of the die sleeve flange;
the cylindrical surface where the top surface of each inner boss is positioned and the cylindrical surface where the bottom surface of each outer boss is positioned are the same cylindrical surface;
the side wall of the die calibrating ring is provided with a plurality of screw holes, and die calibrating screws are screwed in the screw holes; each screw hole is symmetrical around the axis of the die calibrating ring, and the screw hole is positioned between two adjacent inner bosses; the space between two adjacent inner bosses is enough to accommodate one outer boss;
6) Switching between the adjustment-free mechanism and the radial fine adjustment mechanism:
the design principle of the step 5) is as follows:
rotating the die calibrating ring to enable the positions of the inner boss and the outer boss to correspond to each other, and attaching the top surfaces and the bottom surfaces of the inner boss and the outer boss to form an adjustment-free mechanism;
and the die calibrating ring is rotated to enable the position of the outer boss to correspond to the space position between the two inner bosses, and a radial fine adjustment mechanism is formed at the moment.
In the step 5), the outer edge of the inner ring forms a pattern and the inner edge of the outer ring forms a pattern which is similar.
Referring to fig. 1 to 7, a cable extruder head of a switchable die-calibrating mode adapted to the above method comprises: the plastic guide device comprises a shell 16, a connecting flange 21, a plastic guide 17, a mold core 24, a mold sleeve 2, a mold sleeve cap 11 and a mold sleeve flange 1;
the inside of the shell 1 is provided with a cavity penetrating front and back;
a through hole is formed on the side wall of the shell to serve as a side wall fluid channel 35; the connecting flange 21 is connected to the side wall of the housing, the flange fluid channel 25 of the hollow position of the connecting flange is communicated with the side wall fluid channel 35, and the side wall fluid channel is communicated with the cavity in the housing;
the glue guide 17 extends into the shell 1 from the rear part of the cavity in the shell and is17Is closely adhered to the inner wall of the cavity; the outer wall of the glue guide is provided with a groove 36, and the inner wall of the cavity encloses a glue guide fluid channel 26; one end of the fluid channel of the glue guide is communicated with the fluid channel of the side wall;
the mold core 24 is connected to the front end of the glue guide 17 and extends out of the cavity of the shell from inside to outside; the front end of the glue guide 17 is provided with a tubular hollow, and the rear end of the mould core extends into the hollow and is connected with the hollow;
the die sleeve 2 is arranged at the rear part of the hollow of the cylindrical die sleeve flange 1, the die sleeve cap 11 is arranged at the front part of the hollow of the die sleeve flange 1, and the die sleeve is fastened in the hollow of the die sleeve flange by the die sleeve cap; the die sleeve flange is connected with the shell, and the die sleeve flange and the outer wall of the front end of the glue guide enclose a die sleeve flange fluid channel 27; the die sleeve is sleeved outside the die core, and the die sleeve and the die core enclose a die sleeve fluid channel 28; two ends of the die sleeve flange fluid channel are respectively communicated with the rubber guider fluid channel and the die sleeve fluid channel;
the wiring channel 29 of the cable extruder head penetrates through the glue guide, the mould core, the mould sleeve and the mould sleeve cap; the axis of the wiring channel is overlapped with the straight line.
The extruder head also comprises a cylindrical die calibrating ring 3; the die calibrating ring and the die sleeve flange form a die calibrating mechanism;
the axis d of the die sleeve flange 1 is parallel or coincident with a straight line l, and a die sleeve connecting mechanism and a die sleeve cap connecting mechanism are arranged on the inner wall of the die sleeve flange 1; the die sleeve flange 1 is provided with a die head connecting structure for connecting an extruder head, and the die head connecting structure is provided with a radial fine adjustment space;
the axis of the die calibrating ring 3 is overlapped with a straight line I, and a limiting mechanism for radially limiting the die calibrating ring on the extruder head is arranged at the rear part of the die calibrating ring;
the inner diameter of the die calibrating ring corresponds to the outer diameter of the die sleeve flange; the die sleeve flange penetrates through the hollow of the die calibrating ring from front to back; the relative positions of the die calibrating ring and the die sleeve flange are circumferentially adjustable;
the inner wall of the die calibrating ring is provided with a plurality of inner bosses 4 facing the straight line l, and the outer wall of the die sleeve flange is provided with a plurality of outer bosses 5 facing away from the axis d;
each inner boss 4 is symmetrical around a straight line l, and the cylindrical surface where the top surface of each inner boss is positioned is a surface a; the outer bosses 5 are symmetrical around the axis d, and the cylindrical surface of the bottom surface of each outer boss is also a surface a;
the side wall of the die calibrating ring is provided with a plurality of screw holes 6, and die calibrating screws 7 are screwed in the screw holes; each screw hole is symmetrical around a straight line l, and the screw holes are positioned between two adjacent inner bosses; the space between two adjacent inner bosses is sufficient to accommodate one outer boss.
In this example of the present invention,
the rear end face of the shell 16 is provided with an annular concave 31, and a plurality of counter bores 32 for placing heaters (electric heating rods) are uniformly distributed in the annular concave; a mounting groove 33 for placing the heater controller is reserved on the side surface of the annular concave, and the mounting groove is exposed out of the side wall of the shell;
a limit boss (limit screw 20 is screwed on the limit boss) is connected to the side wall of the rear part of the glue guide 17, a concave 34 corresponding to the limit boss is arranged on the side wall of the cavity in the shell, and the limit boss is arranged in the concave.
A die sleeve flange heater 23 is wrapped outside the outer wall of the die sleeve flange 1; a temperature measuring hole 22 for installing a temperature sensor is formed in the die sleeve flange 1; the connecting flange 21 is provided with a temperature measuring hole 22 for installing a temperature sensor.
On the radial section, the pattern surrounded by the inner wall of the die calibrating ring and the pattern surrounded by the inner wall of the die sleeve flange are similar patterns. The distance between the surface a and the bottom of the position between two adjacent inner bosses is 1-5 mm; the distance between the surface a and the top of the position between two adjacent outer bosses is 1-5 mm.
The rear end face of the die calibrating ring is connected with an annular step 8, the axes of the annular steps coincide with a straight line l, and the inner diameter of the annular step is larger than that of the die calibrating ring; the annular step forms a limiting mechanism radially limited on the extruder head.
The outer diameter of a circular cake-shaped flange seat 15 used for connecting a die sleeve flange on a shell 16 of the extruder head is the same as the inner diameter of the annular step 8, and a die calibrating ring is sleeved outside the flange seat through the annular step and is tightly matched with the annular step.
Referring to fig. 2 to 5, the handpiece connection structure has a plurality of groups symmetrical about the axis d, each group of handpiece connection structure including a through hole 9 and a connection screw 10 in the through hole; the inner diameter of the front part of the through hole is larger than the outer diameter of the main body of the connecting screw, and the inner diameter of the rear part of the through hole is larger than the outer diameter of the screw head of the connecting screw; the clearance between the through hole and the connecting screw forms a radial fine adjustment space. The connecting screw is connected to the flange seat 15 on the housing 16 of the extruder head through the through hole.
The hollow of the die sleeve flange 1 is divided into a front section and a rear section; the rear section of the die sleeve flange is hollow and is in a truncated cone shape corresponding to the shape of the die sleeve 2, and the small bottom of the truncated cone faces the rear of the die sleeve flange; the front section hollow of the die sleeve flange is cylindrical, and the inner wall of the front section hollow of the die sleeve flange is provided with internal threads corresponding to the external threads of the die sleeve cap 11.
Referring to fig. 2, the outer wall of the die sleeve flange is connected with an annular convex 12, and the distance between the rear end surface of the annular convex and the rear end surface of the die sleeve flange is not greater than the distance between the front end surface and the rear end surface of the die calibrating ring.
Referring to fig. 1 and 2, the die ring 3 is sandwiched between a flange seat 15 on the extruder head housing and the die sleeve flange 1.
For convenient use, the outer wall of the die calibrating ring is connected with a handle 13; the front end face of the die calibrating ring and the outer wall of the die sleeve flange are provided with corresponding alignment marks 14.
During processing, the die calibrating ring and the annular steps on the die calibrating ring are of an integral structure and can be manufactured by machining an annular blank by adopting a machine tool. Likewise, the die sleeve flange and the annular outer bulge on the die sleeve flange are of an integral structure and can be manufactured by machining an annular blank by adopting a machine tool.
The glue guide is provided with a plurality of adjusting screws 18 and adjusting nuts 19 for adjusting the size of a gap between the front end face of the rear seat of the glue guide and the rear end face of the shell. The glue guide is connected with the shell through a connecting screw 10.
The die calibrating ring 2 can rotate through the handle, and the die calibrating ring and the die sleeve flange can rotate through the die calibrating ring so as to change the assembly and matching form. A die sleeve union cap 11 is used to define the die sleeve 2.
Referring to fig. 2, the die sleeve 2 is mounted within a die sleeve flange, enclosing a through die sleeve fluid passage 28. In production, fluid enters the glue guide fluid channel 26 from the flange fluid channel 25, passes through the die sleeve flange fluid channel 27, passes through the die sleeve fluid channel 28, and finally is coated on the central conductor to be extruded.
The center position of the die sleeve flange can be changed by adjusting the die adjusting screw 7 through a gap 30 of 1-5 mm between the die sleeve flange 1 and the die adjusting ring 3, so that fine adjustment of concentricity between the die sleeve and the die core of the machine head is realized.
After the die calibrating ring 1 rotates for a certain position through the handle 13, the inner boss 4 of the die calibrating ring 3 is contacted with the outer boss 5 of the die sleeve flange 1, so that the die sleeve flange 1 is automatically centered to realize the machine head adjustment-free function.
With the above-described preferred embodiments of the present invention, various changes and modifications can be made by the worker without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of the claims.
Claims (10)
1. The die calibrating method of the cable extruder head comprises the steps of adjusting the radial relative positions of a die core and a die sleeve until axes of the die core and the die sleeve are collinear; the method for adjusting the radial relative position of the mold core and the mold sleeve is fixed and fine-tuning, and is characterized in that a set of adjusting mechanism is designed, and the adjustment-free and radial fine-tuning can be used on the same adjusting mechanism in a switchable manner; the design method comprises the following steps:
1) The selected radial fine tuning object is a mold core or a mold sleeve:
because the mold core is connected to the axis position of the extruder head, the structural interference generated by the radial position change of the mold core comprises a housing of the extruder head, a glue guide and a glue running channel;
the die sleeve is connected in the shell of the extruder head through a die sleeve flange, and the structural interference of the radial position of the die sleeve is limited to the die sleeve flange;
then the die sleeve is selected to be subjected to radial fine adjustment;
2) Selecting the position of a die sleeve radial fine adjustment mechanism:
the die sleeve is a high-precision piece, and the structure of the die sleeve is fixed; the die sleeve and the die sleeve flange are relatively fixed, and the radial fine adjustment of the die sleeve is realized through the radial fine adjustment of the die sleeve flange, so that the radial relative position of the die core and the die sleeve is adjusted;
3) Radial fine adjustment mechanism is designed:
design principle: the circle center deviation degree of the inner ring and the outer ring is adjusted in a mode of adjusting the approach degree of the outer edge of the inner ring and the inner edge of the outer ring in a structure mode of clearance fit of the inner ring and the outer ring;
the structure is realized: a cylindrical die sleeve flange is sleeved with a cylindrical die calibrating ring, and a gap is reserved between the inner wall of the die calibrating ring and the outer wall of the die sleeve flange; the side wall of the die calibrating ring is penetrated with a plurality of axisymmetric screw holes, and the screw holes are internally screwed with calibrating screws; the distance between each calibration screw and the axis of the die calibrating ring is adjusted, so that the die sleeve flange is driven, and the degree that the axis of the die sleeve flange deviates from the axis of the die calibrating ring is adjusted;
4) And (3) designing an adjustment-free mechanism:
design principle: the inner ring and the outer ring are fixed in a structure form of close fit of the inner ring and the outer ring, and the circle centers of the inner ring and the outer ring are overlapped;
the structure is realized: a cylindrical die sleeve flange is sleeved with a cylindrical die calibrating ring, and the inner wall of the die calibrating ring is closely attached to the outer wall of the die sleeve flange; the adjustment-free die sleeve is realized by fixing the relative positions of the die sleeve flange/the die calibrating ring and the die core;
5) And a switching mechanism of the adjustment-free mechanism and the radial fine adjustment mechanism is designed:
design principle: in the form of a close fit structure of an inner ring and an outer ring, the outer diameter of part of the inner ring is respectively reduced, and the inner diameter of part of the outer ring is enlarged; the enlarged portion of the outer ring is sufficient to accommodate the un-narrowed portion of the inner ring;
rotating the outer ring to enable unchanged parts of the inner ring and the outer ring to be closely attached to each other, and in the state, the circle centers of the inner ring and the outer ring are coincident;
rotating the outer ring to make the un-contracted part of the inner ring correspond to the expanded part of the outer ring, so that the inner ring is not limited by the outer ring in the state, and the position of the inner ring is adjustable;
the structure is realized: the outer diameter of the die sleeve flange is smaller than that of the die calibrating ring;
a plurality of axisymmetric inner bosses which face the axis of the inner boss are arranged on the inner wall of the die calibrating ring,
the outer wall of the die sleeve flange is provided with a plurality of axisymmetric outer bosses which are opposite to the axis of the die sleeve flange;
the cylindrical surface where the top surface of each inner boss is positioned and the cylindrical surface where the bottom surface of each outer boss is positioned are the same cylindrical surface;
the side wall of the die calibrating ring is provided with a plurality of screw holes, and die calibrating screws are screwed in the screw holes; each screw hole is symmetrical around the axis of the die calibrating ring, and the screw hole is positioned between two adjacent inner bosses; the space between two adjacent inner bosses is enough to accommodate one outer boss;
6) Switching between the adjustment-free mechanism and the radial fine adjustment mechanism:
the design principle of the step 5) is as follows:
rotating the die calibrating ring to enable the positions of the inner boss and the outer boss to correspond to each other, and attaching the top surfaces and the bottom surfaces of the inner boss and the outer boss to form an adjustment-free mechanism;
and the die calibrating ring is rotated to enable the position of the outer boss to correspond to the space position between the two inner bosses, and a radial fine adjustment mechanism is formed at the moment.
2. The method of calibrating a cable extruder head according to claim 1, wherein in step 5), the outer periphery of the inner ring is patterned and the inner periphery of the outer ring is patterned similarly.
3. The method of calibrating a cable extruder head according to claim 1, wherein the cable extruder head comprises: the plastic mould comprises a shell, a connecting flange, a plastic guide, a mould core, a mould sleeve combining cap and a mould sleeve flange;
the inside of the shell is provided with a cavity penetrating front and back;
the side wall of the shell is provided with a through hole as a side wall fluid channel; the connecting flange is connected to the side wall of the shell, the flange fluid channel at the hollow position of the connecting flange is communicated with the side wall fluid channel, and the side wall fluid channel is communicated with the cavity in the shell;
the glue guide extends into the shell from the rear part of the cavity in the shell, and the outer wall of the glue guide is closely adhered to the inner wall of the cavity; the outer wall of the glue guide is provided with a groove, and the inner wall of the cavity encloses a glue guide fluid channel; one end of the fluid channel of the glue guide is communicated with the fluid channel of the side wall;
the mold core is connected to the front end of the glue guide and extends out of the cavity of the shell from inside to outside;
the die sleeve is sleeved at the rear part in the hollow of the cylindrical die sleeve flange, the die sleeve is sleeved at the front part in the hollow of the die sleeve flange, and the die sleeve is fastened in the hollow of the die sleeve flange by the die sleeve and the die cap; the die sleeve flange is connected with the shell, and a die sleeve flange fluid channel is formed by surrounding the die sleeve flange and the outer wall of the front end of the glue guide; the die sleeve is sleeved outside the die core, and the die sleeve and the die core enclose a die sleeve fluid channel; two ends of the die sleeve flange fluid channel are respectively communicated with the rubber guider fluid channel and the die sleeve fluid channel;
the wiring channel of the cable extruder head penetrates through the glue guide, the mold core, the mold sleeve and the mold sleeve cap; the axis of the wiring channel is overlapped with the straight line I, and the die calibrating ring is cylindrical; the die calibrating ring and the die sleeve flange form a die calibrating mechanism;
the axis d of the die sleeve flange is parallel or coincident with the straight line l, and the inner wall of the die sleeve flange is provided with a die sleeve connecting mechanism and a die sleeve cap connecting mechanism; the die sleeve flange is provided with a die head connecting structure for connecting the extrusion die head, and the die head connecting structure is provided with a radial fine adjustment space;
the axis of the die calibrating ring is overlapped with a straight line I, and a limiting mechanism for radially limiting the die calibrating ring to the extruder head is arranged at the rear part of the die calibrating ring;
the inner diameter of the die calibrating ring corresponds to the outer diameter of the die sleeve flange; the die sleeve flange penetrates through the hollow of the die calibrating ring from front to back; the relative positions of the die calibrating ring and the die sleeve flange are circumferentially adjustable;
the inner wall of the die calibrating ring is provided with a plurality of inner bosses facing the straight line l, and the outer wall of the die sleeve flange is provided with a plurality of outer bosses facing away from the axis d;
each inner boss is symmetrical around a straight line l, and the cylindrical surface where the top surface of each inner boss is positioned is a surface a; each outer boss is symmetrical around an axis d, and the cylindrical surface where the bottom surface of each outer boss is positioned is also a surface a;
the side wall of the die calibrating ring is provided with a plurality of screw holes, and die calibrating screws are screwed in the screw holes; each screw hole is symmetrical around a straight line l, and the screw holes are positioned between two adjacent inner bosses; the space between two adjacent inner bosses is sufficient to accommodate one outer boss.
4. The method for calibrating a cable extruder head according to claim 3, wherein the rear end face of the calibration ring is connected with an annular step, the axes of the annular steps coincide with a straight line l, and the inner diameter of the annular step is larger than the inner diameter of the calibration ring; the annular step forms a limiting mechanism radially limited on the extruder head.
5. A method of calibrating a cable extruder head according to claim 3, wherein the head connection structure has a plurality of groups symmetrical about an axis d, each group of head connection structure including a through hole and a connection screw in the through hole; the inner diameter of the front part of the through hole is larger than the outer diameter of the main body of the connecting screw, and the inner diameter of the rear part of the through hole is larger than the outer diameter of the screw head of the connecting screw; the clearance between the through hole and the connecting screw forms a radial fine adjustment space.
6. The method for calibrating a cable extruder head according to claim 3, wherein the outer wall of the die sleeve flange is connected with an annular convex, and the distance between the rear end surface of the annular convex and the rear end surface of the die sleeve flange is not greater than the distance between the front end surface and the rear end surface of the die sleeve ring.
7. A method of calibrating a cable extruder head according to claim 3, wherein the bottom of the face a at a position between adjacent inner bosses is 1-5 mm; the distance between the surface a and the top of the position between two adjacent outer bosses is 1-5 mm.
8. A method of calibrating a cable extruder head according to claim 3, wherein the pattern defined by the inner wall of the calibration ring and the pattern defined by the inner wall of the die sleeve flange are similar patterns in radial cross section.
9. The method for calibrating a cable extruder head according to claim 3, wherein the rear end face of the shell is provided with an annular concave, and a plurality of counter bores for placing heaters are uniformly distributed in the annular concave; the side face of the annular concave is provided with a mounting groove for placing the heater controller, and the mounting groove is exposed out of the side wall of the shell;
the side wall of the rear part of the glue guide is connected with a limiting boss, the side wall of the cavity in the shell is provided with a concave corresponding to the limiting boss, and the limiting boss is in the concave.
10. A method of calibrating a cable extruder head according to claim 3, wherein a jacket flange heater is wrapped around the outer wall of the jacket flange; a temperature measuring hole for installing a temperature sensor is formed in the die sleeve flange; the connecting flange is provided with a temperature measuring hole for installing a temperature sensor.
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| CN202111238474.6A CN113977911B (en) | 2021-10-25 | 2021-10-25 | Mould calibrating method for cable extruder head |
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| KR20060103294A (en) * | 2005-03-25 | 2006-09-28 | 차봉열 | A tapying machine |
| CN105044868A (en) * | 2015-08-31 | 2015-11-11 | 沈阳亨通光通信有限公司 | Optical cable preparation device |
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| CN209880273U (en) * | 2019-07-30 | 2019-12-31 | 河北宁星电气科技有限公司 | Double-layer co-extrusion machine head for cable processing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6592789B2 (en) * | 2001-05-18 | 2003-07-15 | James B. Barsby | Apparatus and methods for mixing and injecting a foam core within an extruded shell |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060103294A (en) * | 2005-03-25 | 2006-09-28 | 차봉열 | A tapying machine |
| CN105044868A (en) * | 2015-08-31 | 2015-11-11 | 沈阳亨通光通信有限公司 | Optical cable preparation device |
| CN205003331U (en) * | 2015-08-31 | 2016-01-27 | 沈阳亨通光通信有限公司 | Optic fibre plastic shield prebalelling guiding device |
| CN105269786A (en) * | 2015-11-15 | 2016-01-27 | 金杯电工衡阳电缆有限公司 | High-extrusion-force double-layer-co-extrusion double-color-wire machine head |
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