CN208614862U - A kind of PTFE preform cutting apparatus - Google Patents

Abstract

The utility model discloses a kind of PTFE preform cutting apparatus, comprising: 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.The utility model ensure 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

A kind of PTFE preform cutting apparatus

Technical field

The utility model relates to PTFE to cut technical field, espespecially a kind of PTFE preform cutting apparatus.

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 purpose of the utility model is to provide a kind of PTFE preform cutting apparatus, ensure that PTFE preform in excision It is non-friable；PTFE preform resection length controllably quantifies, and reduces waste；End face after the excision of PTFE preform is smooth, operability By force.

The technical scheme that the utility model is provided is as follows:

A kind of PTFE preform cutting apparatus, comprising:

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 utility model greatly reduce subsequent extrusion process the broken pipe of extrusion and The risk for squeezing out 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.

It is further preferred that the positioning mechanism includes the location hole and positioning pin matched, the location hole is set to arc Shape block and/or the upper clump weight, the positioning pin through the location hole with realize the block arc and it is described on match The positioning of pouring 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.

It is further preferred that further including setting graduated scale, the blade with the blade assembly of the scale is zero Benchmark, and extend 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 the cutting of the utility model, marked by having graduated scale Determine the resection of PTFE preform, convenient for staff to the control of resection, and then improve staff cuts efficiency.

A kind of PTFE preform cutting apparatus provided by the utility model, can bring it is following at least one the utility model has the advantages that

1, in the utility model, by the PTFE preform of transparent protection of pipe paste shape, PTFE preform is effectively avoided to exist There is broken phenomenon during excision hardening position (protruding from the PTFE preform for cutting end), ensure that The integrality of PTFE preform；Upper clump weight and the lower cooperation for placing block are to press PTFE preform, so that PTFE preform By precompressed blade assembly is located at blade during position is hardened in excision under the gravity of upper clump weight PTFE preform is non-friable, to ensure that the flatness of the end face after the excision of PTFE preform, strong operability and is easy to real Now and control；More preferably, the resection length of PTFE preform can be realized according to the length at the hardening position of current PTFE preform It cuts, different PTFE preforms can accurately be cut according to its hardening characteristics, so that different PTFE preforms is cut Length realizes controllable quantization, reduces the waste of PTFE preform；The utility model greatly reduces squeezing for subsequent extrusion process It breaks pipe out and squeezes out the risk of inclined wall, ensure that the quality and yield rate of PTFE.

2, in the utility model, the setting of block arc not only effectively prevents PTFE preform in adjustment resection length mistake The offset phenomena of transparent pipe is (when PTFE preform cuts end passage to deposit end direction, for transparent pipe by arc in journey Block resists and can not cut end movement with PTFE preform direction, so that PTFE preform can be protruded from quickly Bright pipe and the adjustment for realizing resection)；More preferably, the first arc groove becomes the supporting part of PTFE preform, so that PTFE pre-shaped Body is not susceptible to offset phenomena when cropped, and then ensure that the integrality of PTFE preform, avoids its stress and breaks Broken phenomenon.

3, in the utility model, the same circle setting of the first arc groove and the second arc groove ensure that PTFE preform upper Uniform force under the gravity of clump 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.It is more excellent , the setting of positioning mechanism improves clump weight and block arc docking speed, cuts institute so as to shorten PTFE preform It takes time, improves speed of cut.More preferably, the resection of PTFE preform is demarcated by having graduated scale, be convenient for Staff further shortens PTFE preform and cuts required time, further improve work people to the control of resection Member's cuts efficiency.

4, in the utility model, the setting of guide assembly ensure that the linearity of reciprocating knives, and then ensure that The flatness of end face after the excision of PTFE preform, 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 Above-mentioned characteristic, technical characteristic, advantage and its implementation be further described.

Fig. 1 is the first example structure schematic diagram of the PTFE preform cutting apparatus of the utility model；

Fig. 2 is the explosion figure structure schematic representation of Fig. 1；

Fig. 3 is second of example structure schematic diagram of the PTFE preform cutting apparatus of the utility model, and in Fig. 3 3-2 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 the PTFE of the utility model.

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 illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, attached drawing will be compareed below Illustrate specific embodiment of the present utility model.It should be evident that the accompanying drawings in the following description is only the one of the utility model A little embodiments for those of ordinary skill in the art without creative efforts, can also be according to these Attached drawing obtains other attached drawings, and obtains other embodiments.

To make simplified form, part relevant to the utility model is only schematically shown in each figure, they are simultaneously Its practical structures as product is not represented.In addition, so that simplified form is easy to understand, have in some figures identical structure or The component of function, only symbolically depicts one of those, or has only marked one of those.Herein, "one" is not It only indicates " only this ", can also indicate the situation of " more than one ".Herein, it should be noted that unless otherwise bright True regulation and restriction, term " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, it can also To be to be detachably connected, or be integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also Indirectly connected through an intermediary, can be the connection inside two elements.For the ordinary skill in the art, The concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.

In example 1, as shown in Figure 1-3, a kind of PTFE preform cutting apparatus, comprising: 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.The knot of the utility model Structure is simple, easily operated, and 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 the component of the utility model, and it is practical new to reduce this The machining accuracy for the component of type being mutually matched, so that the utility model is more easily implemented.Preferably, transparent pipe 102 can be Bright 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.

It should be noted that above-described embodiment can be freely combined as needed.The above is only the utility model Preferred embodiment, it is noted that for those skilled in the art, do not departing from the utility model principle Under the premise of, several improvements and modifications can also be made, these improvements and modifications also should be regarded as the protection scope of the utility model.

Claims (8)

1. a kind of PTFE preform cutting apparatus characterized by comprising

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.

6. PTFE preform cutting apparatus according to claim 4, it is characterised in that:

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.

7. PTFE preform cutting apparatus described in -6 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.

8. PTFE preform cutting apparatus described in -6 any one according to claim 1, which is characterized in that further include:

If graduated scale, the scale using the blade of the blade assembly as zero reference, and along the PTFE preform Axis direction extends.