CN218196828U - Pressure head of PFTE pushing machine - Google Patents

Abstract

The utility model discloses a PFTE bulldozer pressure head, its characterized in that: the exhaust hole is formed in the pressing block, a connecting structure is arranged at the top of the pressing block, a first concave conical surface is arranged at the bottom of the pressing block, a pressing plate is arranged below the pressing block, a second conical surface matched with the first conical surface is arranged at the top of the pressing plate, and a telescopic mechanism is arranged between the pressing plate and the pressing block; the pressing block is composed of a first shaft, a second shaft and a third shaft which are sequentially connected in series from top to bottom, the diameters of the first shaft, the second shaft and the third shaft are sequentially reduced, the connecting structure is an external thread arranged on the first shaft, the exhaust hole is a straight-through hole, one end of the exhaust hole is located on a first conical surface, and the other end of the exhaust hole is located on the side wall of the second shaft. The utility model discloses have the maintenance frequency low and maintain more convenient advantage.

Description

Pressure head of PFTE pushing machine

Technical Field

The utility model belongs to PFTE bulldozes the machine field, especially relates to a PFTE bulldozes quick-witted pressure head.

Background

The PFTE particles are extruded in a push press to be formed into bars, the bars are subjected to rolling and film forming, the films are split into fibers, the fibers are twisted into yarns, and the yarns can be used as textile raw materials. PFTE particles enter the material pipe (enter from the side wall opening of the material pipe) from the feeding hole of the pushing machine, a pressure head at the top of the material pipe is pushed by a hydraulic cylinder to descend, the PFTE particles are extruded into a heating device, and the PFTE particles are extruded from a die after being melted and are cooled and shaped when meeting water. And after all PFTE particles in the material pipe are extruded, the pressure head rises back to the original position again, and the PFTE particles are put into the material pipe again for next batch of extrusion. The pressure head needs to form an exhaust channel, if the pressure head extrudes PFTE particles, a large amount of air in the material pipe is pressed into the die and extruded together with the PFTE, so that a large amount of bubbles are formed in the bar, and the bar cannot be used.

The structure of current pressure head, include and expect that the pipe matches, columniform briquetting, the upper end of briquetting is equipped with connection structure (usually for the screw thread), the briquetting passes through connection structure and bulldozes the output shaft of last pneumatic cylinder and links to each other, the bottom of briquetting is equipped with the clamp plate, the diameter of clamp plate slightly is less than expects the pipe internal diameter, the clamp plate passes through the screw rod and connects the briquetting, form the gap that can prevent most PFTE granule to pass between clamp plate and the briquetting, be equipped with a plurality of exhaust holes on the briquetting, the one end in exhaust hole is on the bottom surface of briquetting, the other end in exhaust hole is on the top surface of briquetting. When the pressure head extrudes PFTE particles, air in the material pipe is discharged from gaps between the pressure plate and the material pipe, gaps between the pressure plate and the pressing block and the exhaust holes.

In the use process, the pressure of the pressure head is high, and PFTE particles are small or crushed to enter the space between the pressure plate and the pressing block to form blockage, so that air is difficult to discharge smoothly, the pressure plate needs to be detached from the pressing block frequently, PFTE particles entering the space between the pressure plate and the pressing block are cleaned, and the maintenance frequency is high.

Therefore, the existing pressure head has the defect of high maintenance frequency.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a PFTE bulldozer pressure head. The utility model discloses have and maintain the frequency low and maintain more convenient advantage.

The technical scheme of the utility model: the utility model provides a PFTE bulldozer pressure head, includes the briquetting, is equipped with the exhaust hole on the briquetting, and the top of briquetting is equipped with connection structure, and the bottom of briquetting is equipped with the first circular conical surface of indent, and the below of briquetting is equipped with the clamp plate, and the top of clamp plate is equipped with and first circular conical surface complex second circular conical surface, is equipped with telescopic machanism between clamp plate and the briquetting.

In the above mentioned PFTE ram, the pressing block is composed of a first shaft, a second shaft and a third shaft which are connected in series from top to bottom, the diameters of the first shaft, the second shaft and the third shaft are reduced in sequence, the connecting structure is an external thread arranged on the first shaft, the vent hole is a straight hole, one end of the vent hole is located on the first conical surface, and the other end of the vent hole is located on the side wall of the second shaft.

In the aforementioned PFTE bulldozing machine pressure head, the top of briquetting is equipped with the internal screw thread blind hole, telescopic machanism is including being located the telescopic link on the clamp plate axis, and the lower extreme and the clamp plate of telescopic link are fixed, and in the blind hole was stretched into to the upper end of telescopic link, the upper end of telescopic link was equipped with the riser, the top of riser be equipped with the end cap of blind hole spiro union, the cover has spiral helicine spring on the telescopic link, the spring is located between briquetting and the clamp plate.

In the above mentioned PFTE pusher ram, the bottom of the pressing block is provided with a counter bore, and the upper part of the spring is located in the counter bore.

In the PFTE pushing ram head, two plugs are arranged.

In the pressure head of the PFTE pushing machine, the exhaust holes are multiple and are uniformly distributed in the circumferential direction.

Compared with the prior art, the utility model discloses on the basis of current pressure head, mainly make following improvement: a. have telescopic machanism between clamp plate and the briquetting, the top of clamp plate is conical, when the pressure head extrusion PFTE granule, receives the reaction force effect of PFTE granule, the distance between clamp plate and the briquetting diminishes, after accomplishing the extrusion, when the pressure head rises once more, the reaction force of the PFTE granule that receives disappears, distance grow between clamp plate and the briquetting makes the PFTE granule that enters into between clamp plate and the briquetting can drop, realize automatic clearance, reduced the maintenance frequency. b. Set up the upper end in exhaust hole on the lateral wall of briquetting to reduced the diameter of briquetting correspondence department lateral wall, during the exhaust, the air is discharged from the lateral wall of briquetting, rather than discharging from the top, if have the PFTE granule to enter into in the exhaust hole under extreme conditions, just can directly dredge the exhaust hole with the pole, be convenient for observe and operate, it is more convenient to maintain. Therefore, the utility model discloses have the maintenance frequency low and maintain more convenient advantage.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of a conventional indenter.

The labels in the figures are: 1-pressing block, 2-exhaust hole, 3-first conical surface, 4-pressing plate, 5-second conical surface, 6-first shaft, 7-second shaft, 8-third shaft, 9-external thread, 10-blind hole, 11-telescopic rod, 12-riser, 13-plug, 14-spring and 15-counter bore.

Detailed Description

The following description is made with reference to the accompanying drawings and examples, but not to be construed as limiting the invention.

Examples are given. The utility model provides a PFTE bulldozing machine pressure head, as shown in figure 1, including briquetting 1, be equipped with exhaust hole 2 on briquetting 1, briquetting 1's top is equipped with connection structure, briquetting 1's bottom is equipped with the first conical surface 3 of indent, briquetting 1's below is equipped with clamp plate 4, clamp plate 4's diameter size slightly is less than the internal diameter size of material pipe, clamp plate 4 and the diameter of the clearance between the material pipe are greater than PFTE granule, clamp plate 4's top be equipped with first conical surface 3 complex second conical surface 5, be equipped with telescopic machanism between clamp plate 4 and the briquetting 1.

The briquetting 1 comprises the first axle 6, the second shaft 7 and the third axle 8 that from the top down establish ties in proper order, and the diameter of first axle 6, second shaft 7 and third axle 8 reduces in proper order, and the first axle 6 is used for connecting the pneumatic cylinder on the bulldozer, and the diameter size of third axle 8 matches with the internal diameter size of material pipe. The connecting structure is an external thread 9 arranged on the first shaft 6, the exhaust hole 2 is a straight-through hole, one end of the exhaust hole 2 is positioned on the first conical surface 3, and the other end of the exhaust hole 2 is positioned on the side wall of the second shaft 7.

The top of briquetting 1 is equipped with internal screw thread blind hole 10, telescopic machanism is including being located the telescopic link 11 on the 4 axes of clamp plate, and the lower extreme and the clamp plate 4 of telescopic link 11 are fixed, and in the blind hole 10 was stretched into to the upper end of telescopic link 11, the upper end of telescopic link 11 was equipped with riser 12, the top of riser 12 was equipped with the end cap 13 with the 10 spiro union of blind hole, and the cover has spiral helicine spring 14 on the telescopic link 11, and spring 14 is located between briquetting 1 and the clamp plate 4.

The bottom of the pressing block 1 is provided with a counter bore 15, and the upper part of the spring 14 is positioned in the counter bore 15.

The number of the plugs 13 is two. The plug 13 can be purchased directly, has threads on the outer peripheral surface and a hexagonal blind hole at the top, and is screwed by a hexagonal wrench. The end cap 13 of downside is used for confirming the biggest rise of telescopic link 11, adjusts the gap width that forms between first circular conical surface 3 and the second circular conical surface 5 when briquetting extrusion PFTE granule, is adapted to the extrusion exhaust of the PFTE granule of different thickness specifications, improves the utility model discloses an application scope. The upper plug 13 is used for pressing the lower plug 13, so that the lower plug 13 is prevented from loosening and moving axially.

The exhaust holes 2 are multiple, and the exhaust holes 2 are circumferentially and uniformly distributed.

The working principle is as follows: when the hydraulic cylinder pushes the pressing block to descend, the pressing plate 4 is firstly contacted with PFTE particles, the spring 14 is compressed under the action of reaction force, the pressing plate 4 is close to the pressing block 1 until the rail 12 is contacted with the plug 13, and at the moment, a narrow gap is formed between the first conical surface 3 and the second conical surface 5. Along with the extrusion, air is discharged from the gap between the material pipe and the pressing plate 4, the gap between the first conical surface 3 and the second conical surface 5 and the exhaust hole 2. After the extrusion of once accomplishing, briquetting 1 receives the hydraulic cylinder to drive the rise and resets, and the spring lengthens again, and the gap grow between first conical surface 3 and the second conical surface 5 enters into the PFTE granule in gap and drops, and every PFTE rod of extruding promptly, the pressure head has the process of once automatic clearance, has reduced the maintenance frequency.

Claims (6)

1. A PFTE pusher ram characterized by: including briquetting (1), be equipped with exhaust hole (2) on briquetting (1), the top of briquetting (1) is equipped with connection structure, and the bottom of briquetting (1) is equipped with first circular conical surface (3) of indent, and the below of briquetting (1) is equipped with clamp plate (4), and the top of clamp plate (4) is equipped with and first circular conical surface (3) complex second circular conical surface (5), is equipped with telescopic machanism between clamp plate (4) and briquetting (1).

2. The PFTE pusher ram of claim 1, wherein: briquetting (1) comprises from the top down in proper order first axle (6), second axle (7) and third axle (8) of establishing ties, and the diameter of first axle (6), second axle (7) and third axle (8) reduces in proper order, connection structure is external screw thread (9) of setting on first axle (6), exhaust hole (2) are through hole, and the one end in exhaust hole (2) is located first circular conical surface (3), and the other end in exhaust hole (2) is located the lateral wall of second axle (7).

3. The PFTE pusher ram of claim 1, wherein: the top of briquetting (1) is equipped with internal screw thread blind hole (10), telescopic machanism is including being located telescopic link (11) on clamp plate (4) axis, and the lower extreme and clamp plate (4) of telescopic link (11) are fixed, and in the upper end of telescopic link (11) stretched into blind hole (10), the upper end of telescopic link (11) was equipped with rail head (12), and the top of rail head (12) was equipped with end cap (13) with blind hole (10) spiro union, and the cover has spiral helicine spring (14) on telescopic link (11), and spring (14) are located between briquetting (1) and clamp plate (4).

4. The PFTE pusher ram of claim 3, wherein: the bottom of the pressing block (1) is provided with a counter bore (15), and the upper part of the spring (14) is positioned in the counter bore (15).

5. The PFTE pusher ram of claim 3, wherein: the number of the plugs (13) is two.

6. The PFTE pusher ram of claim 2, wherein: the exhaust hole (2) is provided with a plurality of exhaust holes (2) which are evenly distributed in the circumferential direction.

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