CN214082745U

CN214082745U - Polytetrafluoroethylene pipe bulldozes mould

Info

Publication number: CN214082745U
Application number: CN202022579922.6U
Authority: CN
Inventors: 刘金飞
Original assignee: Jiangsu Shangke Fluoroplastic Machinery Technology Co ltd
Current assignee: Jiangsu Shangke Fluoroplastic Machinery Technology Co ltd
Priority date: 2020-11-10
Filing date: 2020-11-10
Publication date: 2021-08-31
Anticipated expiration: 2030-11-10

Abstract

The utility model discloses a polytetrafluoroethylene tube pushing and pressing die, which comprises an upper die component and a lower die component, wherein the upper die component comprises a pushing and pressing head and a core rod, the lower die component comprises a forming film and an outer die, the core rod passes through the forming film and the outer die from top to bottom, a forming inner cavity is formed between the core rod and the forming film, an extrusion inner cavity is formed between the core rod and the outer die, the core rod is divided into an upper core rod and a hollow lower core rod, after the pushing and pressing head is sleeved outside the upper core rod, the upper end of the upper core rod and the upper end of the pushing and pressing head are fixedly connected with the driving end of a driver; the lower end of the pushing head is used for being pressed into the forming inner cavity; the lower end of the upper core rod penetrates through the forming film and then is in threaded connection with the upper end of the lower core rod arranged in the outer die, the lower end of the lower core rod penetrates out of the outer die, and the forming film and the outer die are connected together and then are fixed on a fixed forming film mounting plate; a plurality of ceramic heating rings are uniformly sleeved outside the outer die along the axial direction. The utility model discloses connect swiftly, can realize producing polytetrafluoroethylene pipe in succession.

Description

Polytetrafluoroethylene pipe bulldozes mould

Technical Field

The utility model relates to a polytetrafluoroethylene pipe pushes away press, more specifically says, relates to a polytetrafluoroethylene pipe bulldozes mould.

Background

The polytetrafluoroethylene tube has the advantages of high and low temperature resistance, corrosion resistance, good insulating property, non-adhesiveness and the like, so that the polytetrafluoroethylene tube is widely applied to various fields of machinery, electronics, chemical engineering, buildings and the like. The existing polytetrafluoroethylene tube is generally manufactured by adopting a pushing machine, and a special tube die which is fast to assemble and disassemble needs to be specially designed in order to continuously manufacture the polytetrafluoroethylene tube.

Disclosure of Invention

1. Technical problem to be solved by the utility model

An object of the utility model is to provide a polytetrafluoroethylene pipe bulldozes mould, adopts the technical scheme of the utility model, simple structure connects swiftly, can realize producing polytetrafluoroethylene pipe in succession.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses a polytetrafluoroethylene pipe bulldozes mould, include the upper die assembly and the lower die assembly of immobilization that drive the up-and-down motion by the driver, upper die assembly include bulldozing head and plug, lower die assembly include shaping membrane and external mold, the plug from the top down pass shaping membrane and external mold, form the shaping inner chamber between plug and the shaping membrane, form the extrusion inner chamber the same with shaping inner chamber cross-section size between plug and the external mold, the plug divide into upper portion plug and hollow lower part plug, bulldoze the head cover after the upper portion plug is established, the upper end of upper portion plug and the upper end of bulldozing head all link firmly with the drive end of driver; the lower end of the pushing head is used for being pressed into the forming inner cavity; the lower end of the upper core rod penetrates through the forming film and then is in threaded connection with the upper end of a lower core rod arranged in the outer die, the lower end of the lower core rod penetrates out of the outer die, and the forming film and the outer die are connected together and then are fixed on a fixed forming film mounting plate; the outer mold is uniformly sleeved with a plurality of ceramic heating rings along the axial direction.

Furthermore, the upper end of the upper core rod is provided with an external thread used for being in threaded connection with an external water pipe in the cooling loop, and the upper end of the upper core rod is provided with an upper positioning step used for positioning the external water pipe in place; the lower end of the upper core rod is provided with an external thread II used for being in threaded connection with the lower core rod, and the lower end of the upper core rod is provided with a lower positioning step used for positioning the lower core rod in place.

Furthermore, after the upper end of the pushing head and the pushing head fixing sleeve are connected in a mode that the annular concave step II and the annular convex step II are matched with each other, the pushing head fixing sleeve is fixed on the pushing head fixing plate, and the pushing head fixing plate is fixedly connected with the driving end of the driver.

Furthermore, after the upper end of the forming film penetrates through the mounting through hole in the forming film mounting plate from bottom to top, the lower end of the forming film is connected with the mounting through hole in a manner that the annular concave step III is matched with the annular convex step III; the lower end face of the forming film is connected with the upper end face of the outer die in a mode that the annular concave step I and the annular convex step I are matched with each other, the lower end face of the forming film abuts against the forming film fixing sleeve in threaded connection on the outer die, and the forming film fixing sleeve is connected with the forming film mounting plate through bolts.

Furthermore, each ceramic heating ring is provided with a temperature sensor for detecting the heating temperature, and a detection head of the temperature sensor extends into a temperature detection hole processed on the outer die.

Furthermore, the forming film is made of No. 45 steel; the outer die is made of No. 45 steel, and the inner circumferential surface of the outer die is plated with nickel and phosphorus; the upper core rod is made of No. 45 steel, and the outer circumferential surface of the upper core rod is plated with chromium, wherein the chromium plating thickness is 3-5 um; the lower core rod is made of No. 45 steel, and the outer circumferential surface of the lower core rod is plated with nickel and phosphorus.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with existing well-known technique, have following beneficial effect:

(1) the utility model discloses a polytetrafluoroethylene pipe bulldozes mould, it is because the surface treatment requirement is different to the plug at the shaping stage with the extrusion stage, consequently divide into upper portion plug and hollow lower part plug with the plug, can conveniently carry out different surface treatment like this, the upper portion plug surface carries out the chrome plating and handles, the surface finish grinding is handled after the chrome plating, roughness control is below RA0.4, the lower part plug surface carries out the nickel-plated phosphorus treatment, the surface finish grinding roughness control is about RA0.2 after the nickel-plated phosphorus, in addition, design into hollow structure with the lower part plug, reduce lower part plug weight, easy to assemble and processing;

(2) the utility model discloses a polytetrafluoroethylene tube bulldozes mould, the upper end of its upper portion plug is processed and is used for with the external water pipe thread connection in the cooling circuit external screw thread, and the upper end of upper portion plug is processed and is used for fixing a position with the external water pipe thread upper positioning step that targets in place, the lower extreme of upper portion plug is processed and is used for fixing a position with the lower part plug thread lower positioning step that targets in place, simple structure, easy dismounting, and guaranteed the concentricity;

(3) the utility model discloses a polytetrafluoroethylene tube bulldozes mould, the up end of its upper portion plug is processed and is used for the cooling water course with cooling circuit intercommunication, just so can adopt the cooling water to cool off upper portion plug, prevents to heat upper portion plug because of the lower part plug intensifies, and then prevents that the powder is heated the caking and blocks up the shaping chamber, influences the unloading;

(4) the utility model discloses a polytetrafluoroethylene tube bulldozes mould, after the upper end of its shaping membrane passed the installation through-hole on the shaping membrane mounting panel from bottom to top, be connected through the mode that annular concave step III and annular convex step III mutually supported between the lower extreme of shaping membrane and the installation through-hole, be connected through the mode that annular concave step I and annular convex step I mutually supported between the lower terminal surface of shaping membrane and the up end of external mold, and the lower terminal surface of shaping membrane supports behind the shaping membrane fixed cover of threaded connection on the external mold, pass through bolted connection between shaping membrane fixed cover and the shaping membrane mounting panel, moreover, the steam generator is simple in structure, quick location targets in place, easy dismounting, and guaranteed the concentricity of shaping membrane and external mold, and then guaranteed the quality of polytetrafluoroethylene tube;

(5) the utility model discloses a polytetrafluoroethylene tube bulldozes mould, its outer mould is evenly overlapped along the axial and is equipped with a plurality of ceramic heating circles outward, all put the temperature sensor who is used for detecting heating temperature on every ceramic heating circles, and temperature sensor's detection head stretches into the temperature detection hole of processing on the external mold, and simple structure connects conveniently, detects the temperature that detects each position of external mold through heating temperature to every ceramic heating circle, and then prevents to bring product quality's problem because of the external mold is heated inhomogeneously.

Drawings

Fig. 1 is a sectional view of a polytetrafluoroethylene tube pushing and pressing mold of the present invention;

fig. 2 is a partial enlarged view of a polytetrafluoroethylene tube pushing and pressing mold a of the present invention;

fig. 3 is a schematic structural view of an upper mandrel in a polytetrafluoroethylene tube pushing and pressing mold according to the present invention;

fig. 4 is a schematic structural diagram of the teflon tube pushing and pressing mold of the present invention assembled on the frame and connected to the driver.

The reference numerals in the schematic drawings illustrate: 1. a push head; 2-1, an upper core rod; 2-1-1, cooling water channel; 2-2, a lower core rod; 3. forming a film; 4. an outer mold; 5. forming a film mounting plate; 6. a ceramic heating ring; 7. a push head fixing sleeve; 8. a pushing head fixing plate; 9. a temperature sensor; 10. forming a film fixing sleeve; A. a driver; a-1, an outer water pipe; a-2 and an inner water pipe.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

Examples

With reference to fig. 1, the teflon tube pressing mold of the present embodiment includes an upper mold assembly and a lower mold assembly, the upper mold assembly is driven by a driver a to move up and down, the upper mold assembly includes a pressing head 1 and a core rod, the lower mold assembly includes a forming film 3 and an outer mold 4, the forming film 3 is made of 45 # steel and is subjected to heat treatment, hardness hardening and tempering is 52-46HRC, surface finish grinding is performed, and surface roughness is controlled below RA 0.4; the outer die 4 is made of No. 45 steel, the inner circumferential surface of the outer die 4 is plated with nickel and phosphorus, and the surface finish grinding roughness is controlled to be about RA 0.2; the core rod penetrates through the forming film 3 and the outer die 4 from top to bottom, a forming inner cavity is formed between the core rod and the forming film 3, an extrusion inner cavity with the same section size as the forming inner cavity is formed between the core rod and the outer die 4, the core rod is divided into an upper core rod 2-1 and a hollow lower core rod 2-2, the upper core rod 2-1 is made of No. 45 steel in the embodiment, the outer circumferential surface of the upper core rod 2-1 is plated with chromium, the chromium plating thickness is 3-5um, and the chromium plating thickness in the embodiment is either 3um or 5um or 4 um; the core rod 2-2 at the lower part comprises a hollow cylinder and a block blocked at the bottom of the cylinder, and the block is connected with the cylinder through a bolt; the lower core rod 2-2 is made of No. 45 steel, and the outer circumferential surface of the lower core rod 2-2 is plated with nickel and phosphorus; because the surface treatment requirements of the core rod are different in the forming stage and the extrusion stage, the core rod is divided into an upper core rod and a hollow lower core rod, so that different surface treatments can be conveniently carried out, the surface of the upper core rod is subjected to chromium plating treatment, the surface is subjected to finish grinding treatment after chromium plating, the roughness is controlled to be below RA0.4, the surface of the lower core rod is subjected to nickel-phosphorus plating treatment, the surface is subjected to finish grinding treatment after nickel-phosphorus plating, the roughness is controlled to be about RA0.2, in addition, the lower core rod is designed into a hollow structure, the weight of the lower core rod is reduced, and the installation and the processing are convenient;

after the pushing head 1 is sleeved outside the upper core rod 2-1, the upper end of the upper core rod 2-1 and the upper end of the pushing head 1 are fixedly connected with the driving end of the driver A, and the lower end of the pushing head 1 is used for being pressed into the forming inner cavity; specifically, after the upper end of the pushing head 1 is connected with the pushing head fixing sleeve 7 in a way that an annular concave step II is matched with an annular convex step II, the pushing head fixing sleeve 7 is fixed on a pushing head fixing plate 8, and the pushing head fixing plate 8 is fixedly connected with the driving end of a driver A;

continuously, the lower end of the upper core rod 2-1 penetrates through the forming film 3 and then is in threaded connection with the upper end of the lower core rod 2-2 arranged in the outer die 4, the lower end of the lower core rod 2-2 penetrates out of the outer die 4, and the forming film 3 and the outer die 4 are connected together and then fixed on a fixed forming film mounting plate 5; specifically referring to fig. 2, after the upper end of the molding film 3 passes through the mounting through hole on the molding film mounting plate 5 from bottom to top, the lower end of the molding film 3 is connected with the mounting through hole in a manner that the annular concave step iii and the annular convex step iii are matched with each other; the lower end face of the forming film 3 is connected with the upper end face of the outer mold 4 in a mode that the annular concave step I and the annular convex step I are matched with each other, and after the lower end face of the forming film 3 abuts against the forming film fixing sleeve 10 which is in threaded connection with the outer mold 4, the forming film fixing sleeve 10 is connected with the forming film mounting plate 5 through bolts, so that the structure is simple, the quick positioning is realized, the assembly and disassembly are convenient, the concentricity of the forming film and the outer mold is ensured, and the quality of the polytetrafluoroethylene tube is further ensured; the lower end of the upper core rod 2-1 is provided with an external thread II which is in threaded connection with the lower core rod 2-2, and the lower end of the upper core rod 2-1 is provided with a lower positioning step which is used for positioning the lower core rod 2-2 in place by threads;

and then, the outer side of the outer die 4 is uniformly sleeved with a plurality of ceramic heating rings 6 along the axial direction, each ceramic heating ring 6 is provided with a temperature sensor 9 for detecting the heating temperature, and a detection head of each temperature sensor 9 extends into a temperature detection hole processed on the outer die 4.

Continuing to fig. 1, a cooling water channel 2-1-1 for communicating with a cooling loop is processed on the upper end surface of an upper core rod 2-1, so that the upper core rod can be cooled by cooling water, the upper core rod is prevented from being heated due to the temperature rise of a lower core rod, and powder is prevented from being heated and agglomerated to block a forming cavity to influence blanking; the upper end of the upper core rod 2-1 is provided with an external thread I which is used for being in threaded connection with an external water pipe A-1 in a cooling loop, and the upper end of the upper core rod 2-1 is processed with an upper positioning step for positioning and positioning the thread of the outer water pipe A-1, in this embodiment, the driver A is a hydraulic cylinder, the cooling circuit is arranged inside the driving rod of the driver A, the arrangement structure of the cooling circuit is shown in FIG. 4, an inner water pipe A-2 is arranged in the outer water pipe A-1, a cooling water inflow channel formed between the inner water pipe A-2 and the outer water pipe A-1 is communicated with the cooling water channel 2-1-1, the inner water pipe A-2 is also communicated with the cooling water channel 2-1-1, thus, the water can flow out from the inner water pipe A-2 after entering the cooling water inflow channel through the cooling water channel 2-1-1.

The utility model discloses a polytetrafluoroethylene pipe bulldozes mould, simple structure connects swiftly, can realize producing polytetrafluoroethylene pipe in succession.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. The utility model provides a polytetrafluoroethylene tube bulldozes mould, includes the last mould subassembly and the lower mould subassembly of immobilization that are driven up-and-down motion by driver (A), last mould subassembly including bulldozing head (1) and plug, lower mould subassembly including shaping membrane (3) and external mold (4), the plug from last down pass shaping membrane (3) and external mold (4), form shaping inner chamber between plug and shaping membrane (3), form the extrusion inner chamber the same with shaping inner chamber cross-sectional size between plug and external mold (4), its characterized in that: the core rod is divided into an upper core rod (2-1) and a hollow lower core rod (2-2), the push pressing head (1) is sleeved outside the upper core rod (2-1), and the upper end of the upper core rod (2-1) and the upper end of the push pressing head (1) are fixedly connected with the driving end of the driver (A); the lower end of the pushing head (1) is used for being pressed into the forming inner cavity; the lower end of the upper core rod (2-1) penetrates through the forming film (3) and then is in threaded connection with the upper end of the lower core rod (2-2) arranged in the outer die (4), the lower end of the lower core rod (2-2) penetrates out of the outer die (4), and the forming film (3) and the outer die (4) are connected together and then are fixed on a fixed forming film mounting plate (5); the outer mold (4) is uniformly sleeved with a plurality of ceramic heating rings (6) along the axial direction.

2. A polytetrafluoroethylene tube pressing die according to claim 1, wherein: a cooling water channel (2-1-1) communicated with a cooling loop is processed on the upper end surface of the upper core rod (2-1); the upper end of the upper core rod (2-1) is provided with an external thread I for being in threaded connection with an external water pipe (A-1) in a cooling loop, and the upper end of the upper core rod (2-1) is provided with an upper positioning step for positioning the external water pipe (A-1) in a threaded manner; the lower end of the upper core rod (2-1) is provided with an external thread II which is used for being in threaded connection with the lower core rod (2-2), and the lower end of the upper core rod (2-1) is provided with a lower positioning step which is used for positioning the lower core rod (2-2) in a threaded position.

3. A polytetrafluoroethylene tube pressing die according to claim 1, wherein: the upper end of the pushing head (1) is connected with the pushing head fixing sleeve (7) in a mutually matched mode through the annular concave step II and the annular convex step II, the pushing head fixing sleeve (7) is fixed on a pushing head fixing plate (8), and the pushing head fixing plate (8) is fixedly connected with the driving end of the driver (A).

4. A polytetrafluoroethylene tube pressing die according to claim 1, wherein: after the upper end of the forming film (3) penetrates through the mounting through hole in the forming film mounting plate (5) from bottom to top, the lower end of the forming film (3) is connected with the mounting through hole in a way that the annular concave step III and the annular convex step III are matched with each other; the lower end face of the forming film (3) is connected with the upper end face of the outer die (4) in a mutually matched mode through the annular concave step I and the annular convex step I, the lower end face of the forming film (3) is abutted to the forming film fixing sleeve (10) in threaded connection on the outer die (4), and the forming film fixing sleeve (10) is connected with the forming film mounting plate (5) through a bolt.

5. A polytetrafluoroethylene tube pressing die according to claim 1, wherein: each ceramic heating ring (6) is provided with a temperature sensor (9) for detecting the heating temperature, and the detection head of the temperature sensor (9) extends into a temperature detection hole processed on the outer die (4).

6. A polytetrafluoroethylene tube pressing die according to claim 1, wherein: the forming film (3) is made of No. 45 steel; the outer die (4) is made of No. 45 steel, and the inner circumferential surface of the outer die (4) is plated with nickel and phosphorus; the upper core rod (2-1) is made of No. 45 steel, and the outer circumferential surface of the upper core rod (2-1) is plated with chromium with the thickness of 3-5 um; the lower core rod (2-2) is made of No. 45 steel, and the outer circumferential surface of the lower core rod (2-2) is plated with nickel and phosphorus.