CN202753390U - Composite plastic pipe forming die - Google Patents
Composite plastic pipe forming die Download PDFInfo
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- CN202753390U CN202753390U CN2012202775985U CN201220277598U CN202753390U CN 202753390 U CN202753390 U CN 202753390U CN 2012202775985 U CN2012202775985 U CN 2012202775985U CN 201220277598 U CN201220277598 U CN 201220277598U CN 202753390 U CN202753390 U CN 202753390U
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Abstract
The utility model relates to the field of plastic forming dies, and aims to provide a composite plastic pipe forming die. The composite plastic pipe forming die comprises a core die, at least two cover dies, an outer die, a splitter, a multi-stage deviation rectifying mechanism and a heating device, the cover dies are coaxially sleeved outside the lower portion of a die core, the outer die is sleeved outside the core die and the cover dies, one-head or multi-head spiral grooves are arranged on the outer side of the lower portion of the core die and the outer sides of the cover dies, the lower end of the core die, the lower ends of the cover dies and the lower end of the outer die are respectively fixedly connected with the upper end of the splitter, the splitter is provided with inlet runners, the number of the inlet runners is equal to that of the spiral grooves, each inlet runner is communicated with the lower end of one spiral groove, and an outlet runner is formed between the upper portion of the outer side of the core die and the upper portion of the inner side of the outer die. The composite plastic pipe forming die has the advantages that wall thickness uniformity of a pipe billet can be adjusted, and incompletely plasticized plastics are easily continued to be plasticized in the die.
Description
Technical field
The utility model relates to the mould for plastics field, and plastics easy composite plastic pipe formation die that continues plasticizing in mould of fully plasticizing can be regulated and do not had to especially a kind of wall thickness uniformity of pipe.
Background technology
The disclosure of the Invention of Chinese patent notification number CN 86108107 a kind of equipment and method that composite construction is moulded pipe of making of pushing, this equipment is by whole dispensing head, the extrusion equipment that comprises extrusion die and fuse forms, dispensing head is divided into significantly and extrusion equipment and three annulus lines converging together, can hold the material of melting; The feed pipeline of fluid diverter; Fuse is comprised of diffusion and condensation type tow conical-tube, all forms a single integral body, and the upstream position of the feed of fluid diverter directly is fixed on the extrusion body, need not additional any fixing muscle; The equipment that this extruding manufacturing composite construction is moulded pipe is the multilayer plastic pipe formation die; Present multilayer plastic pipe formation die exists the wall thickness uniformity of pipe can not regulate and not have the plastics of fully plasticizing to be difficult for continuing the deficiency of plasticizing in mould; Therefore, plastics easy composite plastic pipe formation die that continues plasticizing in mould of fully plasticizing can be regulated and do not had to the wall thickness uniformity that designs a kind of pipe, becomes problem demanding prompt solution.
The utility model content
The purpose of this utility model is to exist the wall thickness uniformity of pipe can not regulate and not have the plastics of fully plasticizing to be difficult for continuing the deficiency of plasticizing in mould in order to overcome present composite plastic pipe formation die, provides a kind of wall thickness uniformity of pipe can regulate and the plastics that do not have a fully plasticizing easy composite plastic pipe formation die that plastifies of continuation in mould.
Concrete technical scheme of the present utility model is:
A kind of composite plastic pipe formation die comprises at least two cover dies outside the core rod bottom of core, coaxial sleeve, is enclosed within external mold, current divider outside core and the cover die, is used for making the uniform multistage deviation correction mechanism of pipe wall thickness and heater; The outer gusset of described core bottom and the outer gusset of cover die are equipped with the helicla flute of or bull; The lower end of the lower end of described core, the lower end of cover die and external mold is fixedly connected with the upper end of current divider respectively; Described current divider is provided with the inlet channel that number equates with the spiral fluted number, and each inlet channel is communicated with a spiral fluted lower end; Consist of the outlet flow that is communicated with on lower end and the spiral fluted in the top of the outer gusset of described core and the external mold between the top of gusset.When this composite plastic pipe formation die uses, the extrusion connection of the plastic extruder that the other end of the inlet channel that number equates with the spiral fluted number equates with the spiral fluted number with number of units respectively; The plasticizing plastics that each plastic extruder is extruded flow into each helicla flute through each inlet channel respectively, the plastics that do not have a fully plasticizing upwards flow at a slow speed along helicla flute and prolong heat time heating time and continue plasticizing, the plastics that each layer plastifies fully are at interflow, the lower end of outlet flow, have gone out the pipe that outlet flow has just become the three-layer plastic pipe; Regulate the radial thickness of outlet flow by multistage deviation correction mechanism, make the even thickness of pipe of the composite plastic pipe of extruding not eccentric.The wall thickness uniformity of this composite plastic pipe formation die pipe can be regulated and do not had the plastics of fully plasticizing to continue easily plasticizing in mould.
As preferably, described external mold comprises patrix, middle mould and counterdie; Described multistage deviation correction mechanism comprise upper step groove that the upper end of ladder adjustable ring, scala media ladder adjustable ring, lower adjustable ring, at least six adjustment screw, small end that middle mould inboard is arranged with and middle mould connects, small end that the counterdie inboard is arranged with and counterdie the upper end perforation middle step groove and be arranged in the low groove of step groove downside; The thickness matching of the width of the large end of described upper step groove and the large end of upper ladder adjustable ring, the diameter of the large end of described upper step groove and the diameter of small end are respectively greater than the external diameter of the large end of upper ladder adjustable ring and the external diameter of small end; Described upper ladder adjustable ring is positioned at step groove, one end of at least two adjustment screw that are uniformly distributed along the circumference passes the outer gusset that middle mould withstands the large end of ladder adjustable ring, adjustment screw is threaded with middle mould, and the lower end of patrix is fixedly connected with the upper end of upper ladder adjustable ring; The thickness matching of the width of the large end of described middle step groove and the large end of scala media ladder adjustable ring, the diameter of the large end of described middle step groove and the diameter of small end are respectively greater than the external diameter of the large end of scala media ladder adjustable ring and the external diameter of small end; Described scala media ladder adjustable ring is arranged in step groove, one end of at least two adjustment screw that are uniformly distributed along the circumference passes the outer gusset that counterdie withstands the large end of scala media ladder adjustable ring, adjustment screw is threaded with counterdie, and the lower end of middle mould is fixedly connected with the upper end of scala media ladder adjustable ring; The thickness matching of the width of described low groove and lower adjustable ring, the diameter of low groove is greater than the external diameter of lower adjustable ring; Described lower adjustable ring is positioned at low groove, and an end of at least two adjustment screw that are uniformly distributed along the circumference passes the outer gusset that counterdie withstands lower adjustable ring, and adjustment screw is threaded with counterdie; The interior gusset of the top of the interior gusset of the interior gusset of described patrix, middle mould, the interior gusset of counterdie, the interior gusset of upper ladder adjustable ring, scala media ladder adjustable ring and the interior gusset of lower adjustable ring consist of the outer gusset of outlet flow.The radial position that can regulate ladder adjustable ring, scala media ladder adjustable ring, lower adjustable ring by the rotation adjustment screw is to the optimum position, makes the even thickness of pipe of the three-layer plastic pipe of extruding not eccentric.Multistage deviation correction mechanism is simple in structure easy to adjust and effect is better.
As preferably, the outer gusset at place, the helicla flute place of described core and cover die be shaped as the taper type that large end is positioned at the lower end.The complete plastics of the plasticizing streamlined flow that can be respectively makes progress vertically fast through the slit between the outer gusset of core bottom and the interior gusset at the cover die of internal layer, in the outer gusset of the cover die of internal layer and the slit between the interior gusset at outer field cover die and the slit between the interior gusset of the outer gusset of outer field cover die and counterdie.
As preferably, described spiral fluted lead angle is that 3 degree are to 6 degree.Take into account the fully flow velocity and the heating plasticizing time that the plastics that do not plastify fully of the plastics of plasticizing.
As preferably, the depth of thread of described helicla flute lower end is greater than the depth of thread of upper end.Flow velocity when increasing the plastics outflow helicla flute upper end that plastifies.
As preferably, the bottom arc transition of described spiral fluted screw thread.Resistance is less.
As preferably, described cover die has two; The spiral fluted head number of the outer gusset of described core bottom and the outer gusset of cover die is four-head or six.Spiral fluted head number is that bull makes the plastics of plasticizing along circumferentially being more evenly distributed.
As preferably, the inlet channel of described current divider has three; Described inlet channel comprises sprue and runner; Described runner is communicated with an end of spiral fluted lower end and sprue respectively.Inlet channel is simple in structure.
As preferably, described runner is the arc groove that is positioned at the current divider upper end, and runner also can equate with corresponding spiral fluted head number and an end is positioned at connecting hole on the current divider for number.Make the helicla flute charging even.
As preferably, described heater comprises the electric heater at the center that is positioned at core and curls up electric heating tube outside the outer gusset of external mold.Simple and practical.
Compared with prior art, the beneficial effects of the utility model are: one. the wall thickness uniformity of this composite plastic pipe formation die pipe can be regulated and do not had the plastics of fully plasticizing to continue easily plasticizing in mould.Two. multistage deviation correction mechanism is simple in structure easy to adjust and effect is better.Three. the large end that is shaped as of the outer gusset at place, the helicla flute place of core and cover die makes the plastics of the fully plasticizing streamlined flow that can be respectively makes progress vertically fast through the slit between the outer gusset of core bottom and the interior gusset at the cover die of internal layer, in the outer gusset of the cover die of internal layer and the slit between the interior gusset at outer field cover die and the slit between the interior gusset of the outer gusset of outer field cover die and counterdie at the taper type of lower end.Four. the spiral fluted lead angle be 3 degree to 6 degree, take into account fully plasticizing plastics flow velocity and do not have the fully heating plasticizing time of the plastics of plasticizing.Five. the depth of thread of helicla flute lower end is greater than the depth of thread of upper end, the flow velocity the when plastics that increase plasticizing flow out the helicla flute upper end.Six. the bottom arc transition resistance of spiral fluted screw thread is less.Seven. spiral fluted head number is that bull makes the plastics of plasticizing along circumferentially being more evenly distributed.Eight. inlet channel is simple in structure, and runner is the arc groove that is positioned at current divider upper end, and runner also can equate with corresponding spiral fluted head number and an end is positioned at connecting hole on the current divider for number, make the helicla flute charging even.Nine. heater comprises the electric heater and the electric heating tube that curls up outside the outer gusset of external mold at the center that is positioned at core, and is simple and practical.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the top view of current divider among Fig. 1.
Among the figure: electric heater-1, electric heating tube-2, core-3, cover die-4, external mold-5, patrix-51, middle mould-52, counterdie-53, upper step groove-54, middle step groove-55, low groove-56, current divider-6, helicla flute-7, upper ladder adjustable ring-8, scala media ladder adjustable ring-9, lower adjustable ring-10, adjustment screw-11, outlet flow-12, sprue-13, runner-14.
The specific embodiment
Below in conjunction with shown in the accompanying drawing the utility model is described further.
Shown in accompanying drawing 1, accompanying drawing 2: a kind of composite plastic pipe formation die comprises at least two cover dies 4 outside the core rod bottom of core 3, coaxial sleeve, is enclosed within external mold 5, current divider 6 outside core 3 and the cover die 4, is used for making the uniform multistage deviation correction mechanism of pipe wall thickness and heater.
The lower end of being connected with external mold in the lower end of the lower end of described core 3, cover die 4 is connected with the upper end screw of current divider 6 respectively.
Described heater comprises the electric heater 1 and the electric heating tube 2 that curls up outside the outer gusset of external mold 5 at the center that is positioned at core 3.
The outer gusset of described core 3 bottoms and the outer gusset of cover die 4 all have the helicla flute 7 of or bull; The lead angle of described helicla flute 7 is that 3 degree are to 6 degree; In the present embodiment, described cover die 4 has two; A number of the helicla flute 7 of the outer gusset of described core 3 bottoms is four-head, and the number of helicla flute 7 of outer gusset that is positioned at the cover die 4 of internal layer is six, and a number of helicla flute 7 that is positioned at the outer gusset of outer field cover die 4 is four-head; The helicla flute 7 of the outer gusset of described core 3 bottoms and the lead angle of helicla flute 7 that is positioned at the outer gusset of outer field cover die 4 are 5 degree, and the lead angle of helicla flute 7 that is positioned at the outer gusset of outer field cover die 4 is 4 degree; The outer gusset at place, helicla flute 7 places of described core 3 and cover die 4 be shaped as the taper type that large end is positioned at the lower end; The depth of thread of described helicla flute 7 lower ends is greater than the depth of thread of upper end; The bottom arc transition of the screw thread of described helicla flute 7; Described helicla flute 7 is consistent in the degree of depth of sustained height.
Described external mold 5 comprises patrix 51, middle mould 52 and counterdie 53; Described multistage deviation correction mechanism comprise upper step groove 54 that the upper end of ladder adjustable ring 8, scala media ladder adjustable ring 9, lower adjustable ring 10,15 adjustment screw 11, small end that middle mould 52 interior gussets have and middle mould 52 connects, small end that counterdie 53 interior gussets have and counterdie 53 the upper end perforation middle step groove 55 and be arranged in the low groove 56 of step groove 55 downsides; The thickness interference fits of the width of described upper step groove 54 large ends and upper ladder adjustable ring 8 large ends, the diameter of described upper step groove 54 large ends and the diameter of small end are respectively greater than the external diameter of upper ladder adjustable ring 8 large ends and the external diameter of small end; Described upper ladder adjustable ring 8 is positioned at step groove 54, one end of five adjustment screw that are uniformly distributed along the circumference 11 passes the outer gusset that middle mould 52 withstands ladder adjustable ring 8 large ends, adjustment screw 11 is threaded with middle mould 52, and the lower end of patrix 51 is connected with the upper end screw of upper ladder adjustable ring 8; The thickness interference fits of the width of described middle step groove 55 large ends and scala media ladder adjustable ring 9 large ends, the diameter of described middle step groove 55 large ends and the diameter of small end are respectively greater than the external diameter of scala media ladder adjustable ring 9 large ends and the external diameter of small end; Described scala media ladder adjustable ring 9 is arranged in step groove 55, one end of five adjustment screw that are uniformly distributed along the circumference 11 passes the outer gusset that counterdie 53 withstands scala media ladder adjustable ring 9 large ends, adjustment screw 11 is threaded with counterdie 53, and the lower end of middle mould 52 is connected with the upper end screw of scala media ladder adjustable ring 9; The thickness interference fits of the width of described low groove 56 and lower adjustable ring 10, the diameter of low groove 56 is greater than the external diameter of lower adjustable ring 10; The end that described lower adjustable ring 10 is positioned at 56, five adjustment screw that are uniformly distributed along the circumference 11 of low groove passes the outer gusset that counterdie 53 withstands lower adjustable ring 10, and adjustment screw 11 is threaded with counterdie 53; Consist of the outlet flow 12 that the lower end is communicated with the upper end of helicla flute 7 between the top of described core 3 outer gussets and the top of external mold 5 interior gussets; The interior gusset of the top of the interior gusset of the interior gusset of described patrix 51, the interior gusset of middle mould 52, counterdie 53, the interior gusset of upper ladder adjustable ring 8, scala media ladder adjustable ring 9 and the interior gusset of lower adjustable ring 10 consist of the outer gusset of outlet flow 12.
Described current divider 6 has the inlet channel that number equates with the number of helicla flute 7, and each inlet channel is communicated with the lower end of a helicla flute 7; In the present embodiment, the inlet channel of described current divider 6 has three; Described inlet channel comprises sprue 13 and runner 14; Described runner 14 is communicated with the lower end of helicla flute 7 and an end of sprue 13 respectively; Described runner is the arc groove that is positioned at current divider upper end, and runner also can equate with corresponding spiral fluted head number and an end is positioned at connecting hole on the current divider for number; With the helicla flute 7 of the outer gusset that is positioned at core 3 bottoms be positioned at runner 14 that the helicla flute 7 of the outer gusset of outer field cover die 4 is communicated with for being positioned at the arc groove of current divider 6 upper ends, equate with a number of corresponding helicla flute 7 for number with the runner 14 of helicla flute 7 connections of the outer gusset that is positioned at outer field cover die 4 six and an end are positioned at the connecting hole of current divider 6 upper ends.
When this composite plastic pipe formation die used, the other end of three sprues 13 was communicated with the extrusion of three plastic extruders respectively; The plasticizing plastics that three plastic extruders are extruded flow into three helicla flutes 7 through three sprues 13 and three runners 14 respectively, the complete plastics of the plasticizing slit between the outer gusset of core 3 bottoms and the interior gusset at the cover die 4 of internal layer respectively, in the outer gusset of the cover die 4 of internal layer and the slit between the interior gusset at outer field cover die 4 and the slit between the interior gusset of the outer gusset of outer field cover die 4 and counterdie 53 fast vertically straight line upwards flow, the plastics that do not have a fully plasticizing then upwards flow at a slow speed along helicla flute 7 and prolong heat time heating time and continue plasticizing, three layers fully the plastics of plasticizing gone out the pipe that outlet flow 12 has just become the three-layer plastic pipe at interflow, the lower end of outlet flow 12; The radial position that can regulate ladder adjustable ring, scala media ladder adjustable ring 9, lower adjustable ring 10 by rotation adjustment screw 11 is to the optimum position, makes the even thickness of pipe of the three-layer plastic pipe of extruding not eccentric.
The beneficial effects of the utility model are: the wall thickness uniformity of this composite plastic pipe formation die pipe can be regulated and do not had the plastics of fully plasticizing to continue easily plasticizing in mould.Multistage deviation correction mechanism is simple in structure easy to adjust and effect is better.The large end that is shaped as of the outer gusset at place, the helicla flute place of core and cover die makes the plastics of the fully plasticizing streamlined flow that can be respectively makes progress vertically fast through the slit between the outer gusset of core bottom and the interior gusset at the cover die of internal layer, in the outer gusset of the cover die of internal layer and the slit between the interior gusset at outer field cover die and the slit between the interior gusset of the outer gusset of outer field cover die and counterdie at the taper type of lower end.The spiral fluted lead angle is 4 degree or 5 degree, takes into account the flow velocity of the plastics that plastify fully and does not have the fully heating plasticizing time of the plastics of plasticizing.The depth of thread of helicla flute lower end is greater than the depth of thread of upper end, the flow velocity the when plastics that increase plasticizing flow out the helicla flute upper end.The bottom arc transition resistance of spiral fluted screw thread is less.Spiral fluted head number is that bull makes the plastics of plasticizing along circumferentially being more evenly distributed.Inlet channel is simple in structure, and runner is the arc groove that is positioned at current divider upper end, and runner also can equate with corresponding spiral fluted head number and an end is positioned at connecting hole on the current divider for number, make the helicla flute charging even.Heater comprises the electric heater and the electric heating tube that curls up outside the outer gusset of external mold at the center that is positioned at core, and is simple and practical.
It is apparent to one skilled in the art that the utility model can be changed into various ways, and such change is not thought and broken away from scope of the present utility model.The apparent modification of the technical staff to described field that all are such will be included within the scope of this claim.
Claims (10)
1. a composite plastic pipe formation die is characterized in that, comprises at least two cover dies outside the core rod bottom of core, coaxial sleeve, is enclosed within external mold, current divider outside core and the cover die, is used for making the uniform multistage deviation correction mechanism of pipe wall thickness and heater; The outer gusset of described core bottom and the outer gusset of cover die are equipped with the helicla flute of or bull; The lower end of the lower end of described core, the lower end of cover die and external mold is fixedly connected with the upper end of current divider respectively; Described current divider is provided with the inlet channel that number equates with the spiral fluted number, and each inlet channel is communicated with a spiral fluted lower end; Consist of the outlet flow that is communicated with on lower end and the spiral fluted in the top of the outer gusset of described core and the external mold between the top of gusset.
2. composite plastic pipe formation die according to claim 1, it is characterized in that: described external mold comprises patrix, middle mould and counterdie; Described multistage deviation correction mechanism comprise upper step groove that the upper end of ladder adjustable ring, scala media ladder adjustable ring, lower adjustable ring, at least six adjustment screw, small end that middle mould inboard is arranged with and middle mould connects, small end that the counterdie inboard is arranged with and counterdie the upper end perforation middle step groove and be arranged in the low groove of step groove downside; The thickness matching of the width of the large end of described upper step groove and the large end of upper ladder adjustable ring, the diameter of the large end of described upper step groove and the diameter of small end are respectively greater than the external diameter of the large end of upper ladder adjustable ring and the external diameter of small end; Described upper ladder adjustable ring is positioned at step groove, one end of at least two adjustment screw that are uniformly distributed along the circumference passes the outer gusset that middle mould withstands the large end of ladder adjustable ring, adjustment screw is threaded with middle mould, and the lower end of patrix is fixedly connected with the upper end of upper ladder adjustable ring; The thickness matching of the width of the large end of described middle step groove and the large end of scala media ladder adjustable ring, the diameter of the large end of described middle step groove and the diameter of small end are respectively greater than the external diameter of the large end of scala media ladder adjustable ring and the external diameter of small end; Described scala media ladder adjustable ring is arranged in step groove, one end of at least two adjustment screw that are uniformly distributed along the circumference passes the outer gusset that counterdie withstands the large end of scala media ladder adjustable ring, adjustment screw is threaded with counterdie, and the lower end of middle mould is fixedly connected with the upper end of scala media ladder adjustable ring; The thickness matching of the width of described low groove and lower adjustable ring, the diameter of low groove is greater than the external diameter of lower adjustable ring; Described lower adjustable ring is positioned at low groove, and an end of at least two adjustment screw that are uniformly distributed along the circumference passes the outer gusset that counterdie withstands lower adjustable ring, and adjustment screw is threaded with counterdie; The interior gusset of the top of the interior gusset of the interior gusset of described patrix, middle mould, the interior gusset of counterdie, the interior gusset of upper ladder adjustable ring, scala media ladder adjustable ring and the interior gusset of lower adjustable ring consist of the outer gusset of outlet flow.
3. composite plastic pipe formation die according to claim 1 and 2 is characterized in that: the outer gusset at the place, helicla flute place of described core and cover die be shaped as the taper type that large end is positioned at the lower end.
4. composite plastic pipe formation die according to claim 1 and 2 is characterized in that: described spiral fluted lead angle is that 3 degree are to 6 degree.
5. composite plastic pipe formation die according to claim 1 and 2, it is characterized in that: the depth of thread of described helicla flute lower end is greater than the depth of thread of upper end.
6. composite plastic pipe formation die according to claim 1 and 2 is characterized in that: the bottom arc transition of described spiral fluted screw thread.
7. composite plastic pipe formation die according to claim 1 and 2, it is characterized in that: described cover die has two; The spiral fluted head number of the outer gusset of described core bottom and the outer gusset of cover die is four-head or six.
8. composite plastic pipe formation die according to claim 6, it is characterized in that: the inlet channel of described current divider has three; Described inlet channel comprises sprue and runner; Described runner is communicated with an end of spiral fluted lower end and sprue respectively.
9. composite plastic pipe formation die according to claim 8 is characterized in that: described runner is the arc groove that is positioned at the current divider upper end, and runner also can equate with corresponding spiral fluted head number and an end is positioned at connecting hole on the current divider for number.
10. composite plastic pipe formation die according to claim 1 and 2 is characterized in that: described heater comprises the electric heater at the center that is positioned at core and curls up electric heating tube outside the outer gusset of external mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202775985U CN202753390U (en) | 2012-06-13 | 2012-06-13 | Composite plastic pipe forming die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202775985U CN202753390U (en) | 2012-06-13 | 2012-06-13 | Composite plastic pipe forming die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202753390U true CN202753390U (en) | 2013-02-27 |
Family
ID=47732585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202775985U Withdrawn - After Issue CN202753390U (en) | 2012-06-13 | 2012-06-13 | Composite plastic pipe forming die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202753390U (en) |
-
2012
- 2012-06-13 CN CN2012202775985U patent/CN202753390U/en not_active Withdrawn - After Issue
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130227 Effective date of abandoning: 20141105 |
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| RGAV | Abandon patent right to avoid regrant |