CN108858337A - A kind of PTFE preform cutting apparatus and method - Google Patents
A kind of PTFE preform cutting apparatus and method Download PDFInfo
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- CN108858337A CN108858337A CN201810873803.6A CN201810873803A CN108858337A CN 108858337 A CN108858337 A CN 108858337A CN 201810873803 A CN201810873803 A CN 201810873803A CN 108858337 A CN108858337 A CN 108858337A
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- ptfe
- ptfe preform
- preform
- cutting
- transparent pipe
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- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims abstract description 220
- 239000004810 polytetrafluoroethylene Substances 0.000 title claims abstract description 220
- 238000005520 cutting process Methods 0.000 title claims abstract description 92
- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000007246 mechanism Effects 0.000 claims description 15
- 230000005484 gravity Effects 0.000 claims description 10
- 230000033001 locomotion Effects 0.000 claims description 7
- 238000002271 resection Methods 0.000 abstract description 20
- 239000002699 waste material Substances 0.000 abstract description 7
- 230000008569 process Effects 0.000 description 14
- 238000001125 extrusion Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000000843 powder Substances 0.000 description 4
- 238000013139 quantization Methods 0.000 description 4
- 238000013467 fragmentation Methods 0.000 description 3
- 238000006062 fragmentation reaction Methods 0.000 description 3
- 238000003032 molecular docking Methods 0.000 description 3
- 238000004904 shortening Methods 0.000 description 3
- 238000005056 compaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/04—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
- B26D1/06—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates
- B26D1/08—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates of the guillotine type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/0006—Means for guiding the cutter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/01—Means for holding or positioning work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/01—Means for holding or positioning work
- B26D2007/013—Means for holding or positioning work the work being tubes, rods or logs
Abstract
The invention discloses a kind of PTFE preform cutting apparatus and method, PTFE preform cutting apparatus includes：For storing the transparent pipe of PTFE preform, transparent pipe includes cutting end and deposit end；For installing the lower placement block of transparent pipe；For cooperating with lower placement block to press the upper clump weight for protruding from the PTFE preform for cutting end；And the blade assembly for cutting PTFE preform, blade assembly, which is set to, cuts end, and can move reciprocatingly along the radial direction of transparent pipe to cut and protrude from the PTFE preform for cutting end.This invention ensures that PTFE preform is non-friable in excision；PTFE preform resection length controllably quantifies, and reduces waste；End face after the excision of PTFE preform is smooth, strong operability.
Description
Technical field
The present invention relates to PTFE to cut technical field, espespecially a kind of PTFE preform cutting apparatus and method.
Background technique
It is excellent that PTFE (polytetrafluoroethylene (PTFE), also known as Teflon) has that coefficient of friction is low, chemical corrosion resistance is good, temperature tolerance is high
Point is a kind of self-lubrication material, and report display PTFE material can be run in 260 DEG C of working environment for a long time.PTFE tree
Rouge has high melt viscosity (10^7-10^8kPas), until melting is not also flowed, 25% or so volume expansion only occurs
And mutually welding is integral.PTFE resin is divided into suspending resin and dispersion resin.The processing of suspending resin mostly uses compression molding
And plunger extrusion molding.The mode that the processing (as shown in Figure 4) of dispersion resin mostly uses paste to squeeze out carries out, i.e., first does powder
At the preform of paste shape, preform is then packed into material chamber and is squeezed out, extrudate obtains production tube after sintering is cooling.
Preform manufacturing process be by powder through extruding after manufactured cylindric green body, both ends need to eliminate one
The material of partially hardened, it is therefore intended that reduce the product fluctuation in extrusion process and reduce the risk for squeezing out broken pipe.But green body exists
It is frangible during excision, arbitrariness is also big for operation, not only cause excision end face out-of-flatness and material waste, it is broken to also add extrusion
Manage and squeeze out the risk of inclined wall.
Summary of the invention
The object of the present invention is to provide a kind of PTFE preform cutting apparatus and method, it ensure that PTFE preform is being cut off
When it is non-friable；PTFE preform resection length controllably quantifies, and reduces waste；End face after the excision of PTFE preform is smooth, operation
Property is strong.
Technical solution provided by the invention is as follows：
A kind of PTFE preform cutting apparatus, including：
For storing the transparent pipe of PTFE preform, the transparent pipe includes cutting end and deposit end；
For installing the lower placement block of the transparent pipe；
For cooperating with the lower block of placing to press the upper counterweight for protruding from the PTFE preform for cutting end
Block；And
For cutting the blade assembly of the PTFE preform, the blade assembly be set to it is described cut end, and can edge
The radial direction of the transparent pipe moves reciprocatingly to cut and protrude from the PTFE preform for cutting end.
In the technical program, by the PTFE preform of transparent protection of pipe paste shape, PTFE preform is effectively avoided to cut
Except there is broken phenomenon during hardening position (protruding from the PTFE preform for cutting end), PTFE ensure that
The integrality of preform；Upper clump weight and the lower cooperation for placing block are to press PTFE preform, so that PTFE preform is upper
The PTFE for being located at blade assembly at blade during position is hardened in excision is pre-
Type body is non-friable, to ensure that the flatness of the end face after the excision of PTFE preform, strong operability and is easily achieved and controls
System；More preferably, the resection length of PTFE preform can be realized according to the length at the hardening position of current PTFE preform and be cut, no
Same PTFE preform can accurately be cut according to its hardening characteristics, so that the cutoff length of different PTFE preforms is realized
Controllable quantization, reduces the waste of PTFE preform；The present invention greatly reduces the broken pipe of extrusion of subsequent extrusion process and squeezes out
The risk of inclined wall, ensure that the quality and yield rate of PTFE.
It is further preferred that the lower placement block is provided with the groove for placing the transparent pipe；The groove is close to institute
Stating to cut holds side to be equipped with for abutting the block arc for cutting end, so that the transparent pipe is located in the groove and institute
It states block arc and encloses and set in the holding tank to be formed；The upper end of the block arc is equipped with the first arc groove, first arc groove
The first lower arcuate surface form the supporting part of the PTFE preform.
In the technical program, the setting of block arc not only effectively prevents PTFE preform in adjustment resection length process
The offset phenomena of middle transparent pipe (when PTFE preform cuts end passage to deposit end direction, is kept off for transparent pipe by arc
Block resist and can not with PTFE preform towards cut end movement so that PTFE preform can quickly protrude from it is transparent
Manage and realize the adjustment of resection)；More preferably, the first arc groove becomes the supporting part of PTFE preform, so that PTFE preform
It is not susceptible to offset phenomena when cropped, and then ensure that the integrality of PTFE preform, avoids its stress and is crushed
Phenomenon.
It is further preferred that the first lower arcuate surface of first arc groove is flushed with the inner sidewall of the transparent pipe and is set
It sets.
In the technical program, the first arc groove flushes setting with the inner sidewall of transparent pipe, greatly reduces PTFE pre-shaped
Body elapses the resistance of process, ensure that stability and integrality that PTFE preform is advanced, to effectively avoid PTFE preform
There is disrepair phenomenon.
It is further preferred that the lower end of the upper clump weight is equipped with the second arc compatible with first arc groove
Slot；The upper clump weight forms close to the end face of the transparent pipe side and described cut supporting for end and set portion；The upper clump weight with
The contact position of the block arc is set with positioning mechanism, so that first arc groove and second arc groove are the same as circle setting.
In the technical program, the same circle setting of the first arc groove and the second arc groove ensure that PTFE preform is matched upper
Uniform force under the gravity of pouring weight to ensure that the concentricity of PTFE preform and transparent pipe, and then maintains
It is cylindric in PTFE preform pre-compaction process, and then effectively avoid cutting the frangible phenomenon of process PTFE preform.More preferably,
The setting of positioning mechanism improves clump weight and block arc docking speed, needed for cutting so as to shorten PTFE preform
Time improves speed of cut.
It is further preferred that the positioning mechanism is concave-convex fit structure；Or, the positioning mechanism includes determining of matching
Position hole and positioning pin, the location hole are set to block arc and/or the upper clump weight, and the positioning pin runs through the location hole
To realize the positioning of the block arc and the upper clump weight.
In the technical program, upper clump weight realizes that the mode of positioning is varied with block arc, specifically can be according to reality
Using being selected.
It is further preferred that further including guide assembly, the guide assembly includes two the first guiding pieces being oppositely arranged,
The extension direction of first guiding piece is identical as the direction of motion of the blade assembly；The blade assembly include blade and with
Second guiding piece of first guides fitting, so that extension direction band of second guiding piece along first guiding piece
The blade is moved to move reciprocatingly；And/or further include setting graduated scale, the knife with the blade assembly of the scale
Piece is zero reference, and is extended along the PTFE pre-shaped body axis direction.
In the technical program, the setting of guide assembly ensure that the linearity of reciprocating knives, and then ensure that PTFE
The flatness of end face after preform excision, strong operability and is easily achieved and controls.
In the technical program, the time required to shortening of the invention cut, demarcated by having graduated scale
The resection of PTFE preform, convenient for staff to the control of resection, and then improve staff cuts efficiency.
The present invention also provides a kind of PTFE preform cutting methods, including step：
PTFE preform is deposited in into the transparent pipe in the deposit end of transparent pipe；
The protrusion length for cutting end that the PTFE preform protrudes from the transparent pipe is adjusted according to the demand of cutting；
Upper clump weight and lower placement block cooperation are protruded from into the PTFE preform for cutting end to press；
Blade assembly is moved reciprocatingly along the radial direction of the transparent pipe to cut and protrude from the institute for cutting end
State PTFE preform.
In the technical program, by the PTFE preform of transparent protection of pipe paste shape, PTFE preform is effectively avoided to cut
Except there is broken phenomenon during hardening position (protruding from the PTFE preform for cutting end), PTFE ensure that
The integrality of preform；Upper clump weight and the lower cooperation for placing block are to press PTFE preform, so that PTFE preform is upper
The PTFE for being located at blade assembly at blade during position is hardened in excision is pre-
Type body is non-friable, to ensure that the flatness of the end face after the excision of PTFE preform, strong operability and is easily achieved and controls
System；More preferably, the resection length of PTFE preform can be realized according to the length at the hardening position of current PTFE preform and be cut, no
Same PTFE preform can accurately be cut according to its hardening characteristics, so that the cutoff length of different PTFE preforms is realized
Controllable quantization, reduces the waste of PTFE preform；The present invention greatly reduces the broken pipe of extrusion of subsequent extrusion process and squeezes out
The risk of inclined wall, ensure that the quality and yield rate of PTFE.
It is further preferred that it is described upper clump weight and lower the placements block are cooperated with press protrude from described in cut end
The PTFE preform specifically includes step：
The upper clump weight and the lower placement block are positioned by positioning mechanism；
The upper clump weight cooperates under its gravity with the lower placement block to press to protrude from and described cut end
The PTFE preform is specific.
In the technical program, the setting of positioning mechanism improves clump weight and block arc docking speed, and ensure that
The same circularity of the two improves speed of cut and quality the time required to cutting so as to shorten PTFE preform.
It is further preferred that described move reciprocatingly blade assembly to cut protrusion along the radial direction of the transparent pipe
Step is specifically included in the PTFE preform for cutting end：
By the blade assembly along the extension direction of guide assembly along the radial direction of the transparent pipe move reciprocatingly with
It cuts and protrudes from the PTFE preform for cutting end.
In the technical program, the setting of guide assembly ensure that the linearity of reciprocating knives, and then ensure that PTFE
The flatness of end face after preform excision, strong operability and is easily achieved and controls.
It adjusts the PTFE preform it is further preferred that the basis cuts demand and protrudes from cutting for the transparent pipe
The protrusion length at end specifically includes step：
The protrusion for cutting end that the PTFE preform protrudes from the transparent pipe is adjusted according to the demand of cutting by scale
Length.
In the technical program, the resection of PTFE preform is demarcated by having graduated scale, is convenient for staff
To the control of resection, the time required to shortening of the invention cut, and then improve staff cuts efficiency.
A kind of PTFE preform cutting apparatus provided by the invention and method, can bring following at least one
Beneficial effect：
1, in the present invention, by the PTFE preform of transparent protection of pipe paste shape, PTFE preform is effectively avoided to cut off
There is broken phenomenon during hardening position (protruding from the PTFE preform for cutting end), ensure that PTFE is pre-
The integrality of type body；Upper clump weight and the lower cooperation for placing block are to press PTFE preform, so that PTFE preform is matched upper
Blade assembly is made to be located at the PTFE pre-shaped at blade during position is hardened in excision under the gravity of pouring weight by precompressed
Body is non-friable, to ensure that the flatness of the end face after the excision of PTFE preform, strong operability and is easily achieved and controls；
More preferably, the resection length of PTFE preform can be realized according to the length at the hardening position of current PTFE preform and be cut, different
PTFE preform can accurately be cut according to its hardening characteristics so that different PTFE preforms cutoff length realization can
Control quantization, reduces the waste of PTFE preform；The present invention greatly reduces the broken pipe of extrusion of subsequent extrusion process and squeezes out inclined
The risk of wall ensure that the quality and yield rate of PTFE.
2, in the present invention, the setting of block arc not only effectively prevents PTFE preform during adjusting resection length
The offset phenomena of transparent pipe is (when PTFE preform cuts end passage to deposit end direction, for transparent pipe by block arc
It resists and end movement can not be cut with PTFE preform direction, so that PTFE preform can quickly protrude from transparent pipe
And realize the adjustment of resection)；More preferably, the first arc groove becomes the supporting part of PTFE preform, so that PTFE preform exists
It is not susceptible to offset phenomena when cropped, and then ensure that the integrality of PTFE preform, avoids its stress and occurs broken existing
As.
3, in the present invention, the same circle setting of the first arc groove and the second arc groove ensure that PTFE preform in upper counterweight
Uniform force under the gravity of block to ensure that the concentricity of PTFE preform and transparent pipe, and then maintains
It is cylindric in PTFE preform pre-compaction process, and then effectively avoid cutting the frangible phenomenon of process PTFE preform.More preferably,
The setting of positioning mechanism improves clump weight and block arc docking speed, needed for cutting so as to shorten PTFE preform
Time improves speed of cut.More preferably, the resection of PTFE preform is demarcated by having graduated scale, is convenient for work
Make personnel to the control of resection, further shortens PTFE preform and cut required time, further improve staff
Cut efficiency.
4, in the present invention, the setting of guide assembly ensure that the linearity of reciprocating knives, and then ensure that PTFE is pre-
The flatness of end face after the excision of type body, strong operability and is easily achieved and controls.
Detailed description of the invention
Below by clearly understandable mode, preferred embodiment is described with reference to the drawings, to PTFE preform cutting apparatus
And above-mentioned characteristic, technical characteristic, advantage and its implementation of method are further described.
Fig. 1 is the first example structure schematic diagram of PTFE preform cutting apparatus of the invention；
Fig. 2 is the explosion figure structure schematic representation of Fig. 1；
Fig. 3 is second of example structure schematic diagram of PTFE preform cutting apparatus of the invention, and the 3-2 in Fig. 3
It is the section figure structure schematic representation at the position J of the 3-1 in Fig. 3；
Fig. 4 is a kind of flow process chart of PTFE of the invention.
Drawing reference numeral explanation：
101.PTFE preform, 102. transparent pipes, 103. descend to place blocks, clump weight on 104., 105. second guiding pieces,
106. blade, 107. first guiding pieces, 108. fixed blocks, 109. block arcs, 110. grooves, 111. first arc grooves, 112.
Second arc groove.
Specific embodiment
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, Detailed description of the invention will be compareed below
A specific embodiment of the invention.It should be evident that drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing, and obtain other embodiments.
To make simplified form, part related to the present invention is only schematically shown in each figure, their not generations
Its practical structures as product of table.In addition, there is identical structure or function in some figures so that simplified form is easy to understand
Component, only symbolically depict one of those, or only marked one of those.Herein, "one" not only table
Show " only this ", can also indicate the situation of " more than one ".Herein, it should be noted that unless otherwise specific
Regulation and restriction, term " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, be also possible to
It is detachably connected, or is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also lead to
It crosses intermediary to be indirectly connected, can be the connection inside two elements.It for the ordinary skill in the art, can be with
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
In example 1, as shown in Figure 1-3, a kind of PTFE preform cutting apparatus, including：For storing PTFE pre-shaped
The transparent pipe 102 of body 101, transparent pipe 102 include cutting end and deposit end；For installing the lower placement block 103 of transparent pipe 102；
For cooperating with lower placement block 103 to press the upper clump weight 104 for protruding from the PTFE preform 101 for cutting end；And it is used for
The blade assembly of PTFE preform 101 is cut, blade assembly, which is set to, cuts end, and can do along the radial direction of transparent pipe 102
It moves back and forth and protrudes from the PTFE preform 101 for cutting end to cut.In practical applications, PTFE preform 101 is from transparent pipe
102 deposit end be put into and in cut distal process for transparent pipe 102 and by upper clump weight 104 and lower placements block 103 cooperate and
It is pressed under the gravity of upper clump weight 104, rear blade assembly will in endface of the upper clump weight 104 far from deposit end side
Protrude from clump weight 104 and lower PTFE preform 101 (i.e. cured section) excision for placing block 103.Structure letter of the invention
Single, easily operated, PTFE preform 101 is non-friable because of the pressing of upper clump weight 104 preload in the process that cuts.
In example 2, as shown in Figure 1-3, on the basis of example 1, lower placement block 103 is provided with for placing
The groove 110 of bright pipe 102；Groove 110 is equipped with close to end side is cut for abutting the block arc 109 for cutting end, so that thoroughly
Bright pipe 102 is located in groove 110 and block arc 109 is enclosed and set in the holding tank to be formed；The upper end of block arc 109 is equipped with first
Arc groove 111, the first lower arcuate surface of the first arc groove 111 form the supporting part of PTFE preform 101.Preferably, the first arc
First lower arcuate surface of shape slot 111 flushes setting with the inner sidewall of transparent pipe 102.Preferably, the lateral wall of PTFE preform 101
It is bonded with transparent pipe 102 or clearance fit.Preferably, block arc 109 and lower placement block 103 are integrally formed, to simplify
Lower placement block 103 is matched with 109 position of block arc, simplifies the processing of component of the invention, is reduced of the invention mutual
The machining accuracy of matched component, so that the present invention is more easily implemented.Preferably, transparent pipe 102 can for transparent plastic tube or
Glass tube.
Preferably, the inner sidewall of holding tank is bonded or clearance fit with transparent pipe 102.Preferably, the depthometer of holding tank
Very little is the 1/3~3/4 of the outer diameter dimension of transparent pipe 102.Since transparent pipe 102 is detachable to be installed on lower placement block 103
Holding tank in, therefore, transparent pipe 102 can be first contained in holding tank, after PTFE preform 101 is stored to transparent pipe again
In 102.It can also be PTFE preform 101 first to store to transparent pipe 102, rear transparent pipe 102 is installed on lower placement block 103 again
In holding tank.Since PTFE preform 101 is paste shape, when the powder equipped with PTFE preform 101 viscous in transparent pipe 102
When last, in order to guarantee PTFE preform 101 lateral wall smoothness, also the transparent pipe 102 of a period of time can will be used to carry out
It is reused after cleaning.
In the third embodiment, as shown in Figure 1-3, on the basis of example 2, the lower end of upper clump weight 104 is equipped with and the
Compatible second arc groove 112 of one arc groove 111；Upper clump weight 104 forms close to the end face of 102 side of transparent pipe and cuts end
Support set portion；The contact position of upper clump weight 104 and block arc 109 is set with positioning mechanism, so that the first arc groove 111 and second
Arc groove 112 is the same as circle setting.In practical applications, it after adjusting the resection of PTFE preform 101, needs will be close to transparent
Pipe 102 is arranged and protrudes from the PTFE preform 101 of transparent pipe 102 to be pressed by upper clump weight 104, recycles blade afterwards
Component cuts off the PTFE preform 101 far from upper 104 side of clump weight.It is worth noting that the list of upper clump weight 104
Position quality should be greater than the unit mass of PTFE preform 101, in this way, PTFE preform 101 can be made in the gravity of upper clump weight 104
It is avoided being located near blade assembly (especially proximate to upper 104 side of clump weight) during blade assembly excision with lower pre-tightened
101 Fragmentation Phenomena of PTFE preform (due to excision PTFE preform 101 (i.e. cured section) eventually abandoned or return
It receives, not related there is Fragmentation Phenomena).Since upper clump weight 104 will also be formed close to the end face of 102 side of transparent pipe
Supporting for transparent pipe 102 sets portion, that is, going up clump weight 104 and block arc 109 close to the end face of 102 side of transparent pipe becomes transparent
Supporting for pipe 102 sets portion, in order to guarantee PTFE preform 101 in the uniformity of the gravity lower stress of upper clump weight 104, upper clump weight
104 is identical along the size of 102 axis direction of transparent pipe with block arc 109, so that the second arc of the second arc groove 112
Bottom surface is identical along the size of 102 axis direction of transparent pipe as the first lower arcuate surface of the first arc groove 111, to ensure that
The uniformity of 101 stress of part PTFE preform of 109 sandwiched of clump weight 104 and block arc, is located to substantially reduce
There is the probability of Fragmentation Phenomena during cutting in PTFE preform 101 at 106 cutting edge of blade.
In example IV, as shown in Figure 1-3, positioning mechanism is concave-convex fit structure, excellent on the basis of embodiment three
Selection of land, the first arc groove 111 and the second arc groove 112 are the semicircular arc of same radius, so that the first arc groove 111
End face and the end face of the second arc groove 112 be plane, in practical applications, mutually matched lug boss and concave part can divide
It is not set to the end face of the first arc groove 111 or the end face of the second arc groove 112, i.e., when lug boss is set to the first arc groove
When 111 end face, then concave part is set to the end face of the second arc groove 112, and the position and quantity of lug boss and concave part are one by one
It is corresponding, it is preferable that a lug boss is respectively arranged in the left and right sides end face of the first arc groove 111, accordingly, the second arc groove 112
Left and right sides end face one concave part is respectively set.Vice versa.
In embodiment five, as shown in Figure 1-3, positioning mechanism includes the positioning matched on the basis of embodiment three
Hole and positioning pin, location hole are set to block arc 109 and/or upper clump weight 104, and positioning pin realizes that arc is kept off through location hole
The positioning of block 109 and upper clump weight 104.In practical applications, location hole can be respectively arranged at clump weight 104 and block arc
On 109, wherein be set to the location hole of clump weight 104 through upper clump weight 104, and be set on block arc 109 and determine
Position hole be blind hole so that positioning pin from the location hole on upper clump weight 104 through value block arc 109 on location hole and
The positioning of clump weight 104 and block arc 109 in realization.Even, the location hole being set on block arc 109 is through-hole, and
Positioning pin is T-type pin at this time, to fall after avoiding positioning pin from sequentially passing through the location hole of clump weight 104 and block arc 109
It falls.Preferably, in order to improve the precision of positioning, the location hole of a pair of pairing and the quantity of positioning pin are at least two groups.Certainly,
Location hole may also set up in the upper surface of block arc 109, and positioning pin is set to the lower end surface of clump weight 104；Or positioning
Hole may also set up in the lower end surface of upper clump weight 104, and positioning pin is set to the upper surface of block arc 109.
In embodiment six, as shown in Figure 1-3, further include guide rail group on the basis of embodiment one, two, three, four or five
Part, guide assembly include two the first guiding pieces 107 being oppositely arranged, the extension direction of the first guiding piece 107 and blade assembly
The direction of motion it is identical；Blade assembly includes blade 106 and the second guiding piece 105 with the cooperation of the first guiding piece 107, so that the
Two guiding pieces 105 move reciprocatingly along the extension direction of the first guiding piece 107 band cutting blade 106.Preferably, blade 106 is circle
Heart blade, certainly, blade can also be the blade of other shapes, but the radial dimension of the cutting edge of blade 106 should be pre- not less than PTFE
The outer diameter dimension of type body 101.Preferably, two the first guiding pieces 107 along transparent pipe 102 radial direction and perpendicular to transparent
The axis direction of pipe 102 is divided into the separate endface for cutting end side of clump weight 104, and (i.e. block arc 109 is separate cuts
Hold the endface of side).Preferably, the first guiding piece 107 is guide bar, and the second guiding piece 105 is corresponding first guiding piece 107
It is provided with the guiding block of guiding channel, and blade 106 is installed on guiding block.In practical applications, the guiding channel set of guiding block
Realize that blade 106 moves back and forth along the extension direction of the first guide member and realizes PTFE preform on the first guide member
101 cut.It is worth noting that two the first guide members can also be divided into the lower two sides for placing block 103.And first guide member
It can be the guide seat equipped with guiding through-hole, and blade 106 is fixed on the guidance axis matched with guiding through-hole, to realize knife
The straight reciprocating motion of piece 106.Preferably, the first guiding piece 107 is fixedly arranged on lower placement block 103 or is used for by fixed block 108
In the lower rack for placing block 103 and the first guiding piece 107 of installation, and then realize the fixation in 106 movement position of blade and direction.
In practical applications, when adjusting the amount of cutting of PTFE preform 101, blade assembly can be removed from guide assembly, is adjusted
After the amount of cutting, then PTFE preform 101 is cut by the cooperation of the first guide member and the second guide member.
In embodiment seven, as shown in Figure 1-3, further include setting on the basis of embodiment one, two, three, four, five or six
Graduated scale, scale using the blade of blade assembly as zero reference, and along 101 axis direction of PTFE preform extend.?
In practical application, due to different types of PTFE preform 101 need the length that cuts can difference, by being zero with blade
Benchmark and towards far from cut end and far from deposit end side and along the axis direction of transparent pipe 102 extend scale come measure excision
The length of amount.Consequently facilitating staff quickly adjusts the resection of different types of PTFE preform 101.Preferably, scale
It is securable to the lower lateral wall for placing block 103 or endface.
In embodiment eight, a kind of PTFE preform cutting method, including step：
PTFE preform is deposited in into the transparent pipe in the deposit end of transparent pipe；
The protrusion length for cutting end that the PTFE preform protrudes from the transparent pipe is adjusted according to the demand of cutting；
Upper clump weight and lower placement block cooperation are protruded from into the PTFE preform for cutting end to press；
Blade assembly is moved reciprocatingly along the radial direction of the transparent pipe to cut and protrude from the institute for cutting end
State PTFE preform.
In the present embodiment, by the PTFE preform of transparent protection of pipe paste shape, PTFE preform is effectively avoided to cut off
There is broken phenomenon during hardening position (protruding from the PTFE preform for cutting end), ensure that PTFE is pre-
The integrality of type body；Upper clump weight and the lower cooperation for placing block are to press PTFE preform, so that PTFE preform is matched upper
Blade assembly is made to be located at the PTFE pre-shaped at blade during position is hardened in excision under the gravity of pouring weight by precompressed
Body is non-friable, to ensure that the flatness of the end face after the excision of PTFE preform, strong operability and is easily achieved and controls；
More preferably, the resection length of PTFE preform can be realized according to the length at the hardening position of current PTFE preform and be cut, different
PTFE preform can accurately be cut according to its hardening characteristics so that different PTFE preforms cutoff length realization can
Control quantization, reduces the waste of PTFE preform；The present invention greatly reduces the broken pipe of extrusion of subsequent extrusion process and squeezes out inclined
The risk of wall ensure that the quality and yield rate of PTFE.
In embodiment nine, a kind of PTFE preform cutting method, but on the basis of be not limited to embodiment eight, it is described will
Upper clump weight and described lower block cooperation is placed to press and protrude from the PTFE preform for cutting end and specifically include step：
The upper clump weight and the lower placement block are positioned by positioning mechanism；
The upper clump weight cooperates under its gravity with the lower placement block to press to protrude from and described cut end
The PTFE preform is specific.
In the present embodiment, by the cooperation of male-female engagement or location hole or positioning pin, clump weight and arc gear are improved
Block docks speed, and ensure that the same circularity of the two, the time required to cutting so as to shorten PTFE preform, improves and cuts speed
Degree and quality.
In embodiment ten, a kind of PTFE preform cutting method, but on the basis of be not limited to embodiment eight or nine, institute
It states and blade assembly moves reciprocatingly along the radial direction of the transparent pipe to cut and protrude from the PTFE for cutting end
Preform specifically includes step：
By the blade assembly along the extension direction of guide assembly along the radial direction of the transparent pipe move reciprocatingly with
It cuts and protrudes from the PTFE preform for cutting end.
In the present embodiment, the setting of guide assembly ensure that the linearity of reciprocating knives, and then ensure that PTFE is pre-
The flatness of end face after the excision of type body, strong operability and is easily achieved and controls.
In embodiment 11, a kind of PTFE preform cutting method, but be not limited to the basis of embodiment eight, nine or ten
On, the basis, which cuts demand and adjusts the PTFE preform and protrude from the protrusion length for cutting end of the transparent pipe, specifically wraps
Include step：
The protrusion for cutting end that the PTFE preform protrudes from the transparent pipe is adjusted according to the demand of cutting by scale
Length.
In the present embodiment, the resection of PTFE preform is demarcated by having graduated scale, is convenient for staff couple
The control of resection, the time required to shortening of the invention cut, and then improve staff cuts efficiency.
In embodiment 12, a kind of PTFE preform cutting method, but be not limited to embodiment eight, nine, ten or 11
On the basis of, it further include step；
The transparent pipe is installed in groove, and described to cut end and be connected to block arc close to the transparent pipe
The end face of side.
In the present embodiment, due to transparent pipe be it is detachable be installed on it is lower place block holding tank in, transparent pipe
Can first be contained in holding tank, after PTFE preform is stored to transparent pipe again.It can also be PTFE preform first to store to saturating
In bright pipe, rear transparent pipe is installed on again in the lower holding tank for placing block.Since PTFE preform is paste shape, when transparent
In pipe when the viscous powder equipped with PTFE preform, in order to guarantee PTFE preform lateral wall smoothness, can will also use one
The transparent pipe of section time reuses after being cleaned.
It should be noted that above-described embodiment can be freely combined as needed.The above is only of the invention preferred
Embodiment, it is noted that for those skilled in the art, in the premise for not departing from the principle of the invention
Under, several improvements and modifications can also be made, these modifications and embellishments should also be considered as the scope of protection of the present invention.
Claims (10)
1. a kind of PTFE preform cutting apparatus, which is characterized in that including：
For storing the transparent pipe of PTFE preform, the transparent pipe includes cutting end and deposit end；
For installing the lower placement block of the transparent pipe；
For cooperating with the lower block of placing to press the upper clump weight for protruding from the PTFE preform for cutting end；With
And
For cutting the blade assembly of the PTFE preform, the blade assembly be set to it is described cut end, and can be along described
The radial direction of transparent pipe moves reciprocatingly to cut and protrude from the PTFE preform for cutting end.
2. PTFE preform cutting apparatus according to claim 1, it is characterised in that：
The lower placement block is provided with the groove for placing the transparent pipe；
The groove is equipped with close to the end side that cuts for abutting the block arc for cutting end, so that the transparent pipe
It is located in the groove and the block arc is enclosed and set in the holding tank to be formed；
The upper end of the block arc is equipped with the first arc groove, and the first lower arcuate surface of first arc groove forms the PTFE
The supporting part of preform.
3. PTFE preform cutting apparatus according to claim 2, it is characterised in that：
First lower arcuate surface of first arc groove flushes setting with the inner sidewall of the transparent pipe.
4. PTFE preform cutting apparatus according to claim 2, it is characterised in that：
The lower end of the upper clump weight is equipped with the second arc groove compatible with first arc groove；
The upper clump weight forms close to the end face of the transparent pipe side and described cut supporting for end and set portion；
The contact position of the upper clump weight and the block arc is set with positioning mechanism, so that first arc groove and described the
Two arc grooves are the same as circle setting.
5. PTFE preform cutting apparatus according to claim 4, it is characterised in that：
The positioning mechanism is concave-convex fit structure；Or,
The positioning mechanism includes the location hole and positioning pin matched, the location hole be set to block arc and/or it is described on
Clump weight, the positioning pin realize the positioning of the block arc and the upper clump weight through the location hole.
6. PTFE preform cutting apparatus described in -5 any one according to claim 1, which is characterized in that further include：
Guide assembly, the guide assembly include two the first guiding pieces being oppositely arranged, the extension side of first guiding piece
To identical as the direction of motion of the blade assembly；The blade assembly include blade and with first guides fitting
Two guiding pieces, so that second guiding piece drives the blade to move reciprocatingly along the extension direction of first guiding piece；
And/or
If graduated scale, the scale using the blade of the blade assembly as zero reference, and along the PTFE preform
Axis direction extends.
7. a kind of PTFE preform cutting method, it is suitable for PTFE preform cutting apparatus described in above-mentioned 1-7 any one,
It is characterised in that it includes step：
PTFE preform is deposited in into the transparent pipe in the deposit end of transparent pipe；
The protrusion length for cutting end that the PTFE preform protrudes from the transparent pipe is adjusted according to the demand of cutting；
Upper clump weight and the lower block of placing are cooperated to press and protrude from the PTFE preform for cutting end；
Blade assembly is moved reciprocatingly along the radial direction of the transparent pipe to cut and protrude from described cut described in end
PTFE preform.
8. PTFE preform cutting method according to claim 7, which is characterized in that it is described by upper clump weight and it is described under
Block cooperation is placed to press and protrude from the PTFE preform for cutting end and specifically include step：
The upper clump weight and the lower placement block are positioned by positioning mechanism；
The upper clump weight cooperates with the lower placement block under its gravity to press and protrude from described cut described in end
PTFE preform is specific.
9. PTFE preform cutting method according to claim 7 or 8, which is characterized in that it is described by blade assembly along institute
The radial direction for stating transparent pipe moves reciprocatingly to cut and protrude from the PTFE preform for cutting end and specifically include step
Suddenly：
The blade assembly is moved reciprocatingly along the extension direction of guide assembly along the radial direction of the transparent pipe to cut
Protrude from the PTFE preform for cutting end.
10. PTFE preform cutting method according to claim 7 or 8, which is characterized in that the basis cuts demand tune
The protrusion length for cutting end that the whole PTFE preform protrudes from the transparent pipe specifically includes step：
The protrusion length for cutting end that the PTFE preform protrudes from the transparent pipe is adjusted according to the demand of cutting by scale.
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| CN201810873803.6A CN108858337A (en) | 2018-08-02 | 2018-08-02 | A kind of PTFE preform cutting apparatus and method |
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|---|---|---|---|
| CN201810873803.6A CN108858337A (en) | 2018-08-02 | 2018-08-02 | A kind of PTFE preform cutting apparatus and method |
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