WO2018196014A1

WO2018196014A1 - Polytetrafluoroethylene tubular product moulding machine

Info

Publication number: WO2018196014A1
Application number: PCT/CN2017/082725
Authority: WO
Inventors: 储绍清
Original assignee: 南通海利特橡塑机械有限公司
Priority date: 2017-04-27
Filing date: 2017-05-02
Publication date: 2018-11-01
Also published as: CN106915026A

Abstract

A polytetrafluoroethylene tubular product moulding machine, comprising a base (1), four columns (2), and a top bracket (10) arranged in order from bottom to top, the four columns (2) being provided with an upper movable work platform (3), a mould base fixing work platform (4), and a lower movable work platform (5) arranged in turn from top to bottom in the vertical direction, an outer mould sleeve (9) being sleeved inside the mould base fixing work platform (4), an upper mould (6) being arranged on the upper movable work platform (3) in a corresponding position above the outer mould sleeve (9), a lower mould (7) being arranged on the lower movable work platform (5) in a corresponding position below the outer mould sleeve (9), and a fixed core rod (8) also being provided in a central position between the base (1) and the mould base fixing work platform (4); a moulding cavity (13) is formed between the core rod (8) and the outer mould sleeve (9); the upper mould (6) moves up and down relative to the position of the top part of the moulding cavity (13); and the overlap of the lower mould (7) over the top part can be adjusted up and down relative to the moulding cavity (13). The present moulding machine has relatively low manufacturing and usage costs and can be adapted to different product heights, implements moulding in one-step, and has automatic mould release. Moulding efficiency and quality are improved, and labour intensity is greatly reduced.

Description

PTFE tubular product molding machine

Technical field

The invention relates to the technical field of tubular product molding machines, in particular to a polytetrafluoroethylene tubular product molding machine.

Background technique

Polymers, especially polytetrafluoroethylene (PTFE) and ultra-high molecular weight polyethylene (UHMWPE), due to their high melt viscosity, low friction coefficient and low critical shear rate, bring mixing and injection molding. It is very difficult to use injection molding machines, it is difficult to injection molding, and it is more difficult to form very large workpieces.

With the rapid development of plastic products technology, the use of changing the proportion of plastics, the development of new plastic alloys has been more and more adopted, but the existing injection molding machine can not directly carry out the ingredients, often using the mixer to make ingredients After the mixing and granulation, the injection molding is carried out, and the cost of the product is high. In addition, the existing injection molding machine often has a high cost for forming large-quality workpieces, which makes it difficult for consumers to accept, and the marketing also brings certain difficulties.

Chinese patent, application (patent) number: CN03230670.9, announced a special molding equipment for composite materials and polymers, including a mixer with a batching bucket (double screw or single screw extruder), with Injection barrel and molding machine for the piston. The outlet of the mixer communicates with the front outlet of the injection cylinder through a check valve, which can inject the material to be molded into the injection cylinder, ensuring that the material of each product is brand new; the injection cylinder passes through the check valve The mold is connected to the mold of the molding machine, and the material in the injection cylinder is injected into the mold through the piston.

The equipment will mix plastic alloys, injection molding and molding into one, which overcomes the difficult problem of polymer materials, composite materials, especially polytetrafluoroethylene (PTFE) and ultra high molecular weight polyethylene (UHMWPE). By changing the volume of the injection cylinder, it is possible to form a large-quality workpiece, which overcomes the problem of high cost of forming a large-quality workpiece of a general injection molding machine, and reduces the clamping force by low-pressure injection molding, thereby reducing equipment cost. The product quality is guaranteed, because compared with other injection molding machines, the machine cost is relatively low, only about one-fifth, using direct molding by molding, maximizing the energy of molding pressure, reducing energy consumption, and easy to form. Large products and multi-cavity products. The molding material has small orientation, no cracking, no deformation, and is easy to ensure quality, in particular, it is easy to form a polymer material such as a polymer material and various plastic alloys.

However, only the sheet-shaped polytetrafluoroethylene product can be formed by using the molding apparatus, and the cylindrical product cannot be produced.

Summary of the invention

In order to overcome the above deficiencies of the prior art, the present invention provides a molding machine for directly molding a cylindrical PTFE product, so that the cylindrical PTFE article can be molded at one time, thereby improving the molding efficiency and quality, and ensuring the cylindrical PTFE product. It has higher wear resistance and longer service life in later use.

The technical solution adopted by the invention is: a polytetrafluoroethylene tubular product molding machine, comprising a base, four uprights and a top bracket arranged in order from bottom to top, wherein the four columns are arranged in a vertical direction from top to bottom. Active workbench, die base fixed workbench and lower activity workbench, where:

The mold base fixed workbench is provided with an outer mold sleeve, and the upper movable mold is provided with an upper mold at an upper position corresponding to the outer mold sleeve, and the lower movable work table is provided with a lower mold corresponding to the outer mold sleeve, and the base and the mold base are fixed. a central rod is also connected to the central portion of the table;

Forming a cavity between the mandrel and the outer sleeve, and filling the cavity with a PTFE filler;

The upper mold has a bottom portion facing the top position of the molded cavity, and is driven up and down along the vertical direction of the molding cavity by the upper power source to insert or pull out the top position of the outer mold sleeve to realize the cylindrical PTFE product. Molding at the top;

The lower mold has a top portion lapped at a bottom position of the inner wall of the outer mold sleeve, and is driven up and down along the vertical direction of the molding cavity by the lower power source, thereby moving up and down at the bottom position of the outer mold sleeve to realize the cylindrical PTFE product. The bottom is molded.

Further, the top bracket is fixed on the four columns by 8 self-locking nuts, firstly, the power source is fixed at the top position of the top bracket, and then the upper power source passes through the upper power shaft to drive the upper movable work and the upper mold up and down. motion.

Further, the lower power source is disposed at the bottom position of the base, the lower movable table is of an inner space type, and the number of the lower power sources is two, and the two lower power sources are symmetrically arranged below the vertical axial direction of the mandrel. At the bottom of the movable workbench, each lower power source pushes the movable workbench up through a push rod.

Further, the bottom of each of the columns extends to the bottom of the base and is fixedly coupled to the base by a reinforcing bushing.

Further, the two ends of the die holder fixing table are respectively fixedly connected to each of the columns through a double ear bracket.

Further, the rated pressures of the upper power source and the lower power source are the same, and both are equal pressure hydraulic cylinders.

Further, the rated powers of the two lower power sources are identical, and the sum of the rated powers of the two lower power sources is equal to the rated power of the upper power source.

Further, the upper power source is a 50T cylinder, and the two lower power sources are 25T cylinders, and have a series of specifications.

Further, the side of the four columns is also provided with an automatic filling device, and the automatic filling device fills the molded cavity with the PTFE filler through the filling tube.

Further, the core rod includes a pressing portion and a connecting portion, wherein the pressing portion has a diameter larger than a diameter of the connecting portion, and the pressing portion is a portion inserted into the outer mold sleeve; the connecting portion is located between the small movable table and the base The part also has a support bushing.

Compared with the prior art, the invention has the beneficial effects that the polytetrafluoroethylene tubular product molding machine of the invention is used for manufacturing a PTFE tubular product, and the lower part is driven by the oil cylinder and the lower mold is lifted and lowered, and can be positioned at will. The outer mold is fixed in the middle, and the upper mold and the upper working should be moved up and down by the cylinder. When working, position the cylinder according to the height of the product required. The middle mandrel is fixed on the base and does not move. After the material cavity is filled and returned, the upper mold rises, the product is ejected, and then automatically falls back to the original place, and a workflow is completed. After adjustment, a variety of PTFE products can be produced.

And the tubular polytetrafluoroethylene product obtained by using the molding mechanism has low manufacturing and sales cost, can be molded at one time, improves molding efficiency and quality, and ensures that the tubular PTFE product has higher performance in later use. Wear resistance and longer life.

DRAWINGS

1 is a schematic structural view of an embodiment of a polytetrafluoroethylene tubular product molding machine;

Figure 2 is a schematic structural view of another embodiment of a polytetrafluoroethylene tubular product molding machine;

Among them: 1-base, 2-column, 3-on active workbench, 4-die fixed workbench, 5-down active workbench, 6-upper die, 7-low die, 8-core bar, 81-crowded Pressing part, 82-joint part; 9-outer mold sleeve, 10-top bracket, 11-low power source, 12-up power source, 13-molded cavity, 14-self-locking nut, 15-up power shaft, 16 -Pusher, 17-ear bracket, 18-reinforcing nut, 19-automatic packing device, 20-filler groove, 21-support bushing.

detailed description

The invention will be further described in conjunction with the accompanying drawings and embodiments, which are intended to illustrate the invention and not to limit the scope of the invention.

As shown in FIG. 1, the Teflon cylindrical product molding machine comprises a base 1, four uprights 2 and a top bracket 10 which are arranged in order from the bottom to the top, and four vertical columns 2 are arranged in the vertical direction from top to bottom. The upper working table 3, the mold base fixed work table 4 and the lower movable work table 5, wherein: the mold base fixed work table 4 is sleeved with an outer mold sleeve 9, and the upper movable work table 3 is corresponding to the upper position of the outer mold sleeve 9 There is an upper mold 6, the lower movable table 5 is provided with a lower mold 7 below the outer mold sleeve 9, and a central rod portion between the base 1 and the mold base fixed table 4 is also connected with a core rod 8; the core rod 8 and the outer core A molding cavity 13 is formed between the mold sleeves 9, and the molding cavity 13 is filled with a PTFE filler; the upper mold 6 has a bottom portion facing the top position of the molding cavity 13, and is driven by the upper power source 12 along the molding cavity 13. Moving up and down in the vertical direction, inserting or pulling out the top position of the outer mold sleeve 9 to mold the top of the cylindrical PTFE product; the lower mold 7 is overlapped at the bottom of the inner wall of the outer mold sleeve 9 and passes through the lower power The source 11 drives it to move up and down along the vertical direction of the molding cavity 13, and thus in the outer sleeve 9 The bottom position moves up and down to mold the bottom of the cylindrical PTFE article.

In the above embodiment, the top bracket 10 is fixed to the four uprights 2 by eight self-locking nuts 14, firstly the upper power source 12 is fixed at the top position of the top bracket 10, and then the upper power source 12 passes through the upper power shaft 15 The top bracket 10 drives the upper movable work 3 and the upper mold 6 to move up and down, ensuring that the structural design of the molding press is relatively tight and takes up less space.

In the above embodiment, as detailed in FIG. 2, the lower power source 11 is disposed at the bottom position of the base 1, the lower movable table 5 is of the inner space type, and the number of the lower power sources 11 is two, and the two lower power sources 11 Arranged symmetrically with respect to the vertical axial direction of the mandrel 8 at the bottom of the lower movable table 5, each of the lower power sources 11 pushes the lower movable table 5 upward by a push rod 16, thereby enhancing the compressive strength of the lower power. Moreover, it is ensured that the lower power source can mold the PTFE seasoning with relatively uniform power, further ensuring better uniformity of the prepared PTFE tubular product. In order to ensure a better use of the molding machine, the distance between the bottom of the upper mold 6 and the top of the outer mold sleeve 9 is set to 250, 260, 280 cm.

In the above embodiment, the bottom of each of the uprights 2 extends to the bottom position of the base 1, and a reinforcing nut 18 is fixedly coupled to the base 1 to increase its strength.

In the above embodiment, the two ends of the die holder fixing table 4 are fixedly connected to each of the columns 2 through a binaural bracket 17, respectively, to increase the strength of the die holder fixing table.

In the above embodiment, the rated power of the upper power source 12 and the lower power source 11 are the same, and both are hydraulic cylinders, and the use performance is good.

In the above embodiment, the rated power of the two lower power sources 11 is uniform, and the sum of the rated powers of the two lower power sources 11 is equal to the rated power of the upper power source 12, and the obtained cylindrical product is of better quality.

In the above embodiment, the upper power source 12 is a 50T cylinder, and the two lower power sources 11 are both 25T cylinders, which have good use effect and low cost.

In the above embodiment, the side of the four columns 2 is further provided with an automatic filling device 19, and the automatic feeding device 19 fills the molded cavity 13 with the PTFE filler through the packing groove 20, which is highly automated and saves labor costs. Further, the mandrel 8 includes a pressing portion 81 and a connecting portion 82, wherein the diameter of the pressing portion 81 is larger than the diameter of the connecting portion 82, and the pressing portion 81 is a portion into which the outer die sleeve 9 is inserted; the connecting portion 82 is located at a small portion The portion between the movable table 5 and the base 1 is also sleeved with a support bushing 21, so that the mandrel can be better connected to the base, and at the same time, the effect of enhancing the strength and life of the mandrel is enhanced.

The tubular polytetrafluoroethylene product obtained by the molding mechanism of the invention has low manufacturing and sales cost, can be molded at one time, improves the molding efficiency and quality, and ensures that the tubular PTFE product has higher performance in later use. Wear resistance and longer life.

The embodiments of the present invention are disclosed in the preferred embodiments, but are not limited thereto, and those skilled in the art can easily understand the spirit of the present invention and make various extensions and changes according to the above embodiments. However, it is within the scope of the invention as long as it does not depart from the spirit of the invention.

Claims

A polytetrafluoroethylene tubular product molding machine, characterized in that it comprises a base arranged in order from bottom to top

(1), four columns (2) and a top bracket (10), four columns (2) are provided with an upper movable table (3), a die base fixed table (4) and a vertical direction from top to bottom. The next activity workbench (5), where:

The mold base fixed workbench (4) is sleeved with an outer mold sleeve (9), and the upper movable work table (3) is provided with an upper mold (6) corresponding to the outer mold sleeve (9), and the lower movable work table (5) a lower mold (7) is disposed below the outer mold sleeve (9), and a central portion between the base (1) and the mold base fixing table (4) is further fixed to the base by a core rod (8);

a molding cavity (13) is formed between the mandrel (8) and the outer die sleeve (9), and the molding cavity (13) is filled with a PTFE filler;

The upper mold (6) has a bottom portion facing the top position of the molding cavity (13), and is driven up and down along the vertical direction of the molding cavity (13) by the upper power source (12) to insert or pull out the outer mold. The top position of the sleeve (9) enables molding of the top of the cylindrical PTFE article;

The lower mold (7) has a top portion lapped at a bottom position of the inner wall of the outer mold sleeve (9), and is driven by the lower power source (11) to move up and down along the vertical direction of the molding cavity (13), thereby being in the outer mold sleeve ( 9) The bottom position moves up and down to mold the bottom of the cylindrical PTFE article.
The polytetrafluoroethylene tubular product molding machine according to claim 1, wherein the top bracket (10) is fixed to the four columns (2) by 8 self-locking nuts (14), firstly powered by ( 12) Fixed at the top position of the top bracket (10), and then the upper power source (12) drives the upper movable work (3) and the upper mold (6) up and down through the upper support (10) through the upper power shaft (15).
The polytetrafluoroethylene tubular product molding machine according to claim 1 or 2, wherein the lower power source (11) is disposed at a bottom position of the base (1), and the lower movable table (5) is an inner space type. And the number of lower power sources (11) is two, and the two lower power sources (11) are symmetrically arranged at the bottom of the lower movable table (5) with respect to the vertical axial direction of the mandrel (8), each of which is powered The source (11) is pushed up by a push rod (16) to move the movable table (5) upward, and the mandrel connected to the base does not move.
The polytetrafluoroethylene tubular product molding machine according to claim 3, wherein the bottom of each of the uprights (2) extends to the bottom of the base (1), and a reinforcing nut (18) and a base are used. (1) Fixed connection.
The polytetrafluoroethylene tubular product molding machine according to claim 3, wherein both ends of the die holder fixing table (4) are respectively fixed to each of the columns (2) by a double ear bracket (17). Connected and height adjustable.
The polytetrafluoroethylene tubular product molding machine according to claim 1 or 2, wherein the upper power source (12) and the lower power source (11) have the same rated pressure and are equal pressure hydraulic cylinders.
The polytetrafluoroethylene tubular product molding machine according to claim 3, characterized in that the rated power of the two lower power sources (11) is uniform, and the rated power and the upper power source of the two lower power sources (11) (12) The rated power is equal.
The polytetrafluoroethylene tubular product molding machine according to claim 7, wherein the upper power source (12) is a 50T cylinder, and the two lower power sources (11) are both 25T cylinders. And has a series of specifications to adapt to different products.
The polytetrafluoroethylene tubular product molding machine according to claim 1 or 2, characterized in that the side of the four uprights (2) is further provided with an automatic filling device (19), and the automatic filling device (19) The molded cavity (13) is filled with a PTFE filler through a packing tank (20).
The polytetrafluoroethylene tubular product molding machine according to claim 1 or 2, wherein the core rod (8) comprises a pressing portion (81) and a connecting portion (82), wherein the pressing portion (81) The diameter is larger than the diameter of the connecting portion (82), and the pressing portion (81) is a portion inserted into the outer mold sleeve (9); the connecting portion (82) is located between the small movable table (5) and the base (1) The part is also covered with a support bushing (21).