CN202685169U - Large PTFE (polytetrafluoroethylene) tube blank die-pressing die structure - Google Patents
Large PTFE (polytetrafluoroethylene) tube blank die-pressing die structure Download PDFInfo
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- CN202685169U CN202685169U CN 201220357393 CN201220357393U CN202685169U CN 202685169 U CN202685169 U CN 202685169U CN 201220357393 CN201220357393 CN 201220357393 CN 201220357393 U CN201220357393 U CN 201220357393U CN 202685169 U CN202685169 U CN 202685169U
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- tube blank
- core rod
- external mold
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Abstract
The utility model discloses a tube blank die and provides a large PTFE (polytetrafluoroethylene) tube blank die-pressing die structure. The large PTFE tube blank die-pressing die is simple in structure, can effectively avoid the napping and strain of die, prolongs the service life of the die and improves the quality of the PTFE tube blanks, solves the technical problems that in the prior art, the die often suffers from napping and strain, the metal scrap iron enters the PTFE tube blank and pollutes the tube blank material, consequently the metal ions of the PTFE tube blank exceed the standard, and even the die occlusion happens to directly scrap the die. The large PTFE tube blank die-pressing die structure disclosed by the utility model comprises a tubular outer die and a die core inserted in the tubular outer die, wherein an annular upper die and an annular lower die are respectively arranged between the two ends of the tubular outer die and the corresponding die core; a plastic upper guide plate is arranged on the lower end face of the upper die and is connected between the inner wall of the tubular outer die and the external wall of the die core in a sliding manner; and gaps are respectively formed between the upper die and the inner wall of the tubular outer die and between the upper die and the external wall of the die core.
Description
Technical field
The utility model relates to a kind of pipe mould, relates in particular to a kind of mould plucking of can effectively avoiding and pulls, and prolongs die life, and improves the large-scale PTFE tube blank compression die structure of PTFE tube base quality.
Background technology
The molding die of existing large-scale PTFE tube base generally all adopts carbon steel chromium plating to make, because the apparent density of PTFE powder is little, therefore the stroke of patrix is all larger in the pipe mold process, because patrix and core rod, can't add lubricant between the outer die cavity, (lubricant meeting severe contamination product quality, and PTFE tube very easily ftractures during the later process sintering), be easy to core rod outer surface and external mold inner surface plucking are pulled when therefore the mold pressing patrix presses down, and the mould plucking is pulled the metal iron filings that produce in the process and can directly be entered in the PTFE tube base, namely polluted PTFE tube base material, the metal ion that causes the PTFE material to cause when high-end electronic chemical product uses exceeds standard, the insulating properties of PTFE material and corrosion-resistant have been affected, anti-permeability performance, cause scrapping of PTFE tube base, simultaneously the mould plucking is pulled when serious even scuffing is occured, and directly causes mould to scrap.
Chinese patent discloses a kind of dies of molded plastic pipe (CN2744500Y), it comprises die and punch, die is provided with injecting hole and the steam vent that is communicated with its inner chamber, punch is provided with the ring flange that connects die, ring flange is close to the entrance point edge of die, and they are linked to each other by several bolts, is provided with some equally distributed ring-type convex tendons at the side face of die, place, right side at the die inner chamber is provided with the ring-type seam, and it closely links to each other with the shoulder of punch.This apparatus structure is simple, is convenient to make, but only is used for the plastic tubes such as processing structure wall tube material and reducing short tube, can't be applicable to the mold pressing processing of large-scale PTFE tube base.
Summary of the invention
The utility model has mainly provided a kind of simple in structure, can effectively avoid the mould plucking to pull, prolong die life, and the large-scale PTFE tube blank compression die structure of raising PTFE tube base quality, solved and exist the easy-to-draw maula of mould to hinder in the prior art, the metal iron filings are entered in the PTFE tube base and polluted blank tube material, caused the metal ion of PTFE tube base to exceed standard, and when serious even the mould scuffing occurs, the technical problem such as directly cause that mould is scrapped.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: a kind of large-scale PTFE tube blank compression die structure, comprise the tubulose external mold and be plugged on the interior core rod of tubulose external mold, between the two ends of tubulose external mold and corresponding core rod, be respectively equipped with the patrix of annular and the counterdie of annular, the lower surface of described patrix is provided with guide plate on the plastics, guide plate slides is connected between the outer wall of the inwall of tubulose external mold and core rod on the plastics, is respectively equipped with the gap between patrix and tubulose external mold inwall and core rod outer wall.The stroke that presses down of large-scale PTFE tube blank compression die is generally about 3000mm, patrix and core rod generally adopt carbon steel chromium plating, guide plate on the plastics of being made by the engineering plastics of high-wearing feature and self lubricity is set by the bottom surface at patrix, make that the outer ring surface of guide plate is slidingly connected on the inwall of tubulose external mold on the plastics, inner ring surface is slidingly connected on the outer wall of core rod, and the patrix of the relative carbon steel chromium plating of plastics and core rod hardness are low, wearability and greasy property are good, therefore it can not pulled core rod and external mold generation plucking in mold process, namely can not produce the metal iron filings and pollute PTFE material phenomenon, having avoided the PTFE tube material to produce metal ion when high-end electronic chemical product uses exceeds standard, and affect PTFE tube material insulating properties and corrosion-resistant, anti-permeability performance etc., guaranteed the quality of PTFE tube material, simultaneously again owing to be provided with the gap between patrix and tubulose external mold inwall and core rod outer wall, therefore at mould patrix being installed and being pressed down in the process of work all can not produce with tubulose external mold and core rod and rub or the phenomenon of colliding with, avoid the generation of scuffing, prolonged the mold use life-span.
As preferably, guide plate is Wear-resistant engineering plastic on the described plastics.The engineering plastics such as polyether-ether-ketone, polyimides, ultra-high molecular weight polyethylene, phenolic resin have good compression strength, wearability and self lubricity, can fully satisfy instructions for use.
As preferably, the gap between described patrix and tubulose external mold inwall and patrix and core rod outer wall is 0.8% to 1.5% of core rod diameter.Keep rational gap between patrix and tubulose external mold and core rod, both satisfied the requirement of strength of patrix, guarantee that again mould can not produce friction or the phenomenon of colliding with in the process of installing and press down work, prolonged the mold use life-span.
As preferably, on the described plastics on guide plate and tubulose external mold inwall and the plastics gap between guide plate and core rod outer wall be 0.15% to 0.25% of core rod diameter.Keep rational gap on the plastics between guide plate and tubulose external mold and core rod, guaranteed on the one hand the sealing of die cavity, guarantee again that on the other hand guide plate can smooth and easy slip between tubulose external mold and core rod on the plastics.
As preferably, described counterdie is identical with size and the shape of patrix, and is provided with the plastics lower guide plate in the upper surface of counterdie, and size and the shape of guide plate are identical on plastics lower guide plate and the plastics.By the upper surface at counterdie the plastics lower guide plate is set, can in dress mould and knockout course, plays a good protection to mould; Versatility was good when the size of guide plate and shape were identical on counterdie and patrix, plastics lower guide plate and the plastics, cut down finished cost.
As preferably, horizontal support has some cushion blocks in the lower end of described tubulose external mold, and the lower surface of cushion block is concordant with the lower surface of counterdie.By the lower end at the tubulose external mold cushion block is set, after pressing down, patrix can utilize the external mold releasing mechanism to detach cushion block, make external mold be in suspended state, and then to pressurize after the patrix pressurization, make the PTFE blank be subject to simultaneously the pressure of counterdie and patrix, be equivalent to upper and lower mould the PTFE blank has been carried out Bidirectional-pressure, make the consistent in density of PTFE blank good, satisfy the technological requirement of PTFE tube base.
Core rod can be the cylinder of real core, and as preferably, described core rod is tubulose, and is provided with plug in the upper end of core rod, is provided with suspension hook at the plug middle part.The tubulose core rod is lightweight, is convenient to install and carrying; Upper end by core rod arranges plug, and at plug suspension hook is set, and is convenient to by suspension hook dismounting mould.
As preferably, be provided with handle at the outer wall near die tip outside the tubulose.Handle is to be convenient to mold attaching/detaching equally.
Therefore, large-scale PTFE tube blank compression die structure of the present utility model has following advantage: the advantage of utilizing compound patrix, it is the cleaning after the carbon steel chromium plating, hardness, intensity, the compression strength of engineering plastics, the characteristic of wearability and self lubricity, two kinds of different materials are reached the advantage that respectively has to combine, so that can overcome large scale in the large-scale PTFE tube mold compression technology, the easy plucking that high-stroke exists is pulled the difficulty with interlock, guaranteed the cleanliness factor of PTFE material, can as the lining of high-end electronic chemical product, prolong the mold use life-span.
Description of drawings:
Fig. 1 is the structural representation of the utility model when beginning to process pipe;
Fig. 2 is the enlarged drawing at A shown in Figure 1 place;
Fig. 3 is the structural representation of the utility model after pipe machines.
The specific embodiment:
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment:
As shown in Figure 1, a kind of large-scale PTFE tube blank compression die structure of the present utility model, comprise tubulose external mold 1 and the coaxial core rod 2 that is plugged in the tubulose external mold 1, core rod 2 is circular tube shaped, plug 8 of welding in the upper port of core rod 2, the middle part is by the screw thread suspension hook 9 that spins on plug 8, welding respectively a handle 10 near the outer wall both sides on tubulose external mold 1 top, the patrix 3 of an annular is housed between the upper end of tubulose external mold 1 and corresponding core rod 2, the counterdie 4 of an annular is housed between the lower end of tubulose external mold 1 and corresponding core rod 2, tubulose external mold 1, core rod 2, patrix 3 and counterdie 4 form by carbon steel chromium plating, and patrix 3 is identical with counterdie 4 sizes and shape, as shown in Figure 2, guide plate 5 on the compound plastics in the lower surface of patrix 3, the compound plastics lower guide plate 6 in the upper surface of counterdie 4, on the plastics guide plate 5 make by the phenolic resin material with plastics lower guide plate 6 and both size and shape identical, the internal diameter of tubulose external mold 1 is φ 520mm, the external diameter of core rod 2 is φ 195mm, patrix 3 and counterdie 4 are 3mm with the gap of the inwall of tubulose external mold 1, with the gap of core rod 2 outer walls also be 3mm, the gap of the inwall of the outer ring surface of guide plate 5 and plastics lower guide plate 6 and tubulose external mold 1 is 0.4mm on the plastics, with the gap of core rod 2 outer walls also be 0.4mm, guarantee that guide plate 5 can slide up and down along the inwall of tubulose external mold 1 and the outer wall of core rod 2 on the plastics, in the both sides, lower end of tubulose external mold 1 respectively horizontal support a cushion block 7, the lower surface of cushion block 7 is concordant with the lower surface of counterdie 4.
During use, as shown in figs. 1 and 3, at first the PTFE raw material are loaded on core rod 2, in the die cavity that guide plate 5 and plastics lower guide plate 6 form on the plastics, install again compound patrix, again charged mould is placed on the hydraulic press, when patrix 3 is forced into 5Mpa, the external mold releasing mechanism of recycling mould lower end detaches cushion block 7, tubulose external mold 1 is suspended on the bottom of counterdie 4, and then patrix 3 was pressurized to 30Mpa and pressurize 30min to 120 minute, this moment, the PTFE blank in the mold cavity was subject to the pressure of counterdie 4 and patrix 3 simultaneously, was equivalent to the PTFE blank and was subjected to Bidirectional-pressure, and the consistent in density that makes the PTFE tube base well and can reach the technological requirement of regulation.The consumption of large-scale PTFE blank reaches 600Kg, highly reach 4500mm, the stroke that presses down of compound patrix reaches 3000mm, because compound patrix not only has the intensity of hardware, and also have excellent abrasive resistance and the self lubricity of high-strength engineering plastic, add rational gap, make compound patrix can not produce with core rod 2 and tubulose external mold 1 in the process that presses down stroke 3000mm that plucking be pulled, scuffing, the metal iron filings of also just having avoided the plucking process of pulling to produce pollute the problem of PTFE raw material.
Specific embodiment described herein only is to design of the present utility model explanation for example.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Claims (8)
1. one kind large-scale PTFE tube blank compression die structure, comprise tubulose external mold (1) and be plugged on the interior core rod (2) of tubulose external mold (1), between the two ends of tubulose external mold (1) and corresponding core rod (2), be respectively equipped with the patrix (3) of annular and annular counterdie (4), it is characterized in that: be provided with guide plate on the plastics (5) in the lower surface of described patrix (3), guide plate on the plastics (5) is slidingly connected between the outer wall of the inwall of tubulose external mold (1) and core rod (2), is respectively equipped with the gap between patrix (3) and tubulose external mold (1) inwall and core rod (2) outer wall.
2. large-scale PTFE tube blank compression die structure according to claim 1, it is characterized in that: guide plate on the described plastics (5) is Wear-resistant engineering plastic.
3. large-scale PTFE tube blank compression die structure according to claim 1 and 2, it is characterized in that: the gap between described patrix (3) and tubulose external mold (1) inwall and patrix (3) and core rod (2) outer wall is 0.8% to 1.5% of core rod (2) diameter.
4. large-scale PTFE tube blank compression die structure according to claim 1 and 2, it is characterized in that: the gap on guide plate on the described plastics (5) and tubulose external mold (1) inwall and the plastics between guide plate (5) and core rod (2) outer wall is 0.15% to 0.25% of core rod (2) diameter.
5. large-scale PTFE tube blank compression die structure according to claim 1 and 2, it is characterized in that: described counterdie (4) is identical with size and the shape of patrix (3), and be provided with plastics lower guide plate (6) in the upper surface of counterdie (4), size and the shape of guide plate (5) are identical on plastics lower guide plate (6) and the plastics.
6. large-scale PTFE tube blank compression die structure according to claim 1 and 2, it is characterized in that: the lower end horizontal support at described tubulose external mold (1) has some cushion blocks (7), and the lower surface of cushion block (7) is concordant with the lower surface of counterdie (4).
7. large-scale PTFE tube blank compression die structure according to claim 1 and 2, it is characterized in that: described core rod (2) is tubulose, and is provided with plug (8) in the upper end of core rod (2), is provided with suspension hook (9) at plug (8) middle part.
8. large-scale PTFE tube blank compression die structure according to claim 1 and 2 is characterized in that: be provided with handle (10) at the outer wall near tubulose external mold (1) top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220357393 CN202685169U (en) | 2012-07-23 | 2012-07-23 | Large PTFE (polytetrafluoroethylene) tube blank die-pressing die structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220357393 CN202685169U (en) | 2012-07-23 | 2012-07-23 | Large PTFE (polytetrafluoroethylene) tube blank die-pressing die structure |
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| Publication Number | Publication Date |
|---|---|
| CN202685169U true CN202685169U (en) | 2013-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220357393 Expired - Lifetime CN202685169U (en) | 2012-07-23 | 2012-07-23 | Large PTFE (polytetrafluoroethylene) tube blank die-pressing die structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102794856A (en) * | 2012-07-23 | 2012-11-28 | 浙江东氟塑料科技有限公司 | Large PTFE tube blank die-pressing die structure and die pressing method |
| CN106915026A (en) * | 2017-04-27 | 2017-07-04 | 南通海利特橡塑机械有限公司 | Polytetrafluoroethylene (PTFE) tubular article moulding press |
-
2012
- 2012-07-23 CN CN 201220357393 patent/CN202685169U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102794856A (en) * | 2012-07-23 | 2012-11-28 | 浙江东氟塑料科技有限公司 | Large PTFE tube blank die-pressing die structure and die pressing method |
| CN102794856B (en) * | 2012-07-23 | 2014-10-29 | 浙江东氟塑料科技有限公司 | Large PTFE tube blank die-pressing die structure and die pressing method |
| CN106915026A (en) * | 2017-04-27 | 2017-07-04 | 南通海利特橡塑机械有限公司 | Polytetrafluoroethylene (PTFE) tubular article moulding press |
| WO2018196014A1 (en) * | 2017-04-27 | 2018-11-01 | 南通海利特橡塑机械有限公司 | Polytetrafluoroethylene tubular product moulding machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130123 |