Cavity assembly, extrusion tool and continuous extruder

Abstract

The utility model discloses a cavity assembly, which relates to the technical field of continuous extrusion forming and comprises a cavity and a die assembly arranged outside the cavity. The die assembly comprises a male die and a female die, a forming cavity is formed between the male die and the female die, a cavity runner is arranged on the cavity, and the cavity runner is communicated with the forming cavity and used for allowing a blank to enter the forming cavity for forming. The utility model further provides an extrusion tool which comprises a compaction wheel, an extrusion wheel and the cavity assembly. The utility model further provides a continuous extruding machine which comprises the extruding tool. According to the utility model, under the condition of the same cavity size, products with larger specifications can be produced, and the disassembly and assembly are more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of continuous extrusion molding, in particular to a cavity component, an extrusion tool and a continuous extruder. Background Art

[0002] Continuous extruder is the core equipment for metal extrusion processing, which mainly includes the cavity, punch, die, guide plate, stop block, extrusion wheel and compaction wheel. Figure 1 As shown, the die and punch are usually located inside the cavity, and the inlet and outlet ends of the two are locked by nuts. This structure is limited by the size of the cavity and cannot produce large-section products. In addition, since the die and punch are inside the cavity, it is inconvenient to disassemble them, especially after production, when the inside of the tooling is filled with materials and is difficult to disassemble.

[0003] Therefore, it is urgent to provide an extrusion tool to solve the above problems existing in the prior art. Utility Model Content

[0004] The purpose of the present invention is to provide a cavity assembly, an extrusion tool and a continuous extruder to solve the problems existing in the above-mentioned prior art. Under the condition of the same cavity size, larger specifications of products can be produced, and disassembly and assembly are more convenient.

[0005] To achieve the above purpose, the present invention provides the following solutions:

[0006] The utility model provides a cavity assembly, comprising a cavity and a mold assembly, wherein the mold assembly is arranged outside the cavity; wherein the mold assembly comprises a punch and a die, a molding cavity is formed between the punch and the die, and a cavity flow channel is provided on the cavity, wherein the cavity flow channel is connected with the molding cavity and is used for allowing a blank to enter the molding cavity for molding.

[0007] Preferably, the cavity is further provided with a core wire passing hole, and the punch is correspondingly provided with a punch core wire hole. The core wire passing hole is connected with the punch core wire hole, and is used for allowing the core wire to enter the forming cavity and for the blank to form a coating layer on the surface of the core wire.

[0008] Preferably, a punch flow channel is provided in the punch, the punch core line hole is located in the punch flow channel, and is fixedly connected to the inner wall of the punch flow channel through a connecting bridge; the cavity flow channel is communicated with the punch flow channel.

[0009] Preferably, there are two cavity flow channels, which are located on both sides of the core wire passing hole and are respectively used to dock with the two extrusion wheel grooves on the extrusion wheel; a stop block is provided behind the inlet end of the cavity flow channel, and the stop block can extend into the corresponding extrusion wheel groove to block the blank from entering the cavity flow channel; a material guide plate is also provided at the front end of the cavity.

[0010] Preferably, a first positioning stop of the punch is provided on a side of the punch close to the cavity, the first positioning stop of the punch is provided around the punch flow channel, and a first positioning stop of the cavity is correspondingly provided on the cavity, and the first positioning stop of the punch and the first positioning stop of the cavity can be engaged with each other;

[0011] A second positioning stop of the punch is further provided on one side of the punch close to the cavity, the second positioning stop of the punch is arranged around the core wire hole of the punch, and a second positioning stop of the cavity is correspondingly provided on the cavity, and the second positioning stop of the punch and the second positioning stop of the cavity can be buckled;

[0012] A punch positioning boss is provided on one side of the punch close to the die, and a die positioning stop is correspondingly provided on the die. The punch positioning boss and the die positioning stop can be engaged with each other.

[0013] Preferably, a sizing belt is provided at the outlet end of the die, and behind the sizing belt, the size of the outlet end of the die gradually increases.

[0014] Preferably, a solid rod portion is provided on one side of the male die close to the female die, and the solid rod portion extends into the female die and forms an annular molding cavity with the female die for molding the pipe.

[0015] Preferably, the mold assembly is fixed to the cavity by fastening screws, and a plurality of fastening screws are evenly arranged around the mold assembly.

[0016] The utility model also provides an extrusion tool, comprising a compacting wheel, an extrusion wheel and the cavity assembly as described above.

[0017] The utility model also provides a continuous extruder, comprising the extrusion tooling as described above.

[0018] Compared with the prior art, the utility model has achieved the following technical effects:

[0019] In the present invention, the die and punch are located outside the cavity and are not limited by the internal size of the cavity. Under the condition of the same cavity size, larger products can be produced. In addition, since the die and punch are located outside the cavity, disassembly and assembly are more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of the installation of the mold assembly and the cavity in the prior art;

[0022] Figure 2 This is a schematic structural diagram of the extrusion tooling in an embodiment of the present utility model;

[0023] Figure 3 This is a schematic diagram of the split structure of the cavity assembly in an embodiment of the present utility model;

[0024] Figure 4 This is a schematic structural diagram of the cavity in an embodiment of the present utility model;

[0025] Figure 5 This is a schematic cross-sectional view of an extrusion wheel in an embodiment of the present utility model;

[0026] Figure 6 This is a schematic diagram of the first angle of the male mold in the embodiment of the present utility model;

[0027] Figure 7 This is a front view of the male mold in the embodiment of the present utility model;

[0028] Figure 8 A second angle schematic diagram of the punch in the embodiment of the present utility model;

[0029] Figure 9 This is a schematic structural diagram of the concave mold in an embodiment of the present utility model;

[0030] Figure 10 This is a cross-sectional view of a mold assembly in an embodiment of the present utility model;

[0031] Figure 11 This is a cross-sectional view of another mold assembly in an embodiment of the present utility model;

[0032] Figure 12 This is a schematic diagram of the dimensions of the sizing belt in an embodiment of the present invention.

[0033] In the figure: 1-compacting wheel; 2-blank; 3-guide plate; 4-core wire; 5-cavity; 6-punch; 7-die; 8-fastening screw; 9-product; 10-extrusion wheel; 11-scraper; 51-cavity flow channel; 52-blocking block; 53-core wire through hole; 54-cavity first positioning stop; 55-cavity second positioning stop; 61-punch flow channel; 62-punch first positioning stop; 63-punch second positioning stop; 64-punch core wire hole; 65-punch positioning boss; 66-connecting bridge; 71-die positioning stop; 72-sizing belt; 101-extrusion wheel groove. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] The purpose of the present invention is to provide a cavity assembly, an extrusion tool and a continuous extruder to solve the problems existing in the above-mentioned prior art. Under the condition of the same cavity size, larger specifications of products can be produced, and disassembly and assembly are more convenient.

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0037] Example 1

[0038] like Figure 2-Figure 11 As shown, a cavity assembly is provided in this embodiment, including a cavity 5 and a mold assembly, and the mold assembly is arranged outside the cavity 5; wherein, the mold assembly includes a punch 6 and a die 7, and a molding cavity is formed between the punch 6 and the die 7, and a cavity flow channel 51 is provided on the cavity 5, and the cavity flow channel 51 is connected to the molding cavity for allowing the blank 2 to enter the molding cavity for molding.

[0039] In this embodiment, the die 7 and the punch 6 are located outside the cavity 5 and are not limited by the internal size of the cavity 5. Under the condition of the same cavity 5 size, larger specifications of products 9 can be produced; in addition, since the die 7 and the punch 6 are located outside the cavity 5, disassembly and assembly are more convenient.

[0040] In this embodiment, the mold assembly is fixed to the cavity 5 by fastening screws 8, and multiple fastening screws 8 are evenly arranged around the mold assembly to improve the connection stability; wherein, the punch 6 and the die 7 are preferably circular structures, and multiple through holes are evenly arranged along the circumference on the outer edges of the punch 6 and the die 7, and the cavity 5 is correspondingly provided with multiple threaded holes. The fastening screws 8 pass through the through holes on the punch 6 and the die 7 and are screwed into the corresponding threaded holes on the cavity 5 to achieve the fixation of the die 7, the punch 6 and the cavity 5.

[0041] In this embodiment, the mold assembly can form different products 9, for example, a product 9 with a continuous coating layer can be produced; in this case, Figure 2-Figure 10 As shown, the cavity 5 is also provided with a core wire passing hole 53, and the punch 6 is correspondingly provided with a punch core wire hole 64, the size of which is slightly larger than the size of the core wire 4. The core wire passing hole 53 is connected to the punch core wire hole 64, and is used to allow the core wire 4 to enter the forming cavity and allow the blank 2 to form a coating layer on the surface of the core wire 4.

[0042] In this embodiment, a punch channel 61 is provided in the punch 6, the punch core line hole 64 is located in the punch channel 61, and is fixedly connected to the inner wall of the punch channel 61 through a connecting bridge 66, and the cavity channel 51 is connected to the punch channel 61; wherein, connecting bridges 66 are provided in the four directions of the upper, lower, left and right of the punch core line hole 64 to improve the connection stability and divide the punch channel 61 into four parts.

[0043] There are two cavity flow channels 51, which are located on both sides of the core wire through hole 53. The extrusion wheel 10 is correspondingly provided with two extrusion wheel grooves 101. The two cavity flow channels 51 are respectively used to dock with the two extrusion wheel grooves 101 on the extrusion wheel 10; and a blocking block 52 is provided behind the inlet end of the cavity flow channel 51. The blocking block 52 can extend into the corresponding extrusion wheel groove 101 to block the blank 2 from entering the cavity flow channel 51; the front end of the cavity 5 is also provided with a guide plate 3 for guiding the feeding of the blank 2. Among them, the side of the cavity 5 close to the extrusion wheel 10 (the side where the inlet end of the cavity flow channel 51 is located) is an arc-shaped surface, which can be fitted with the extrusion wheel 10. The blocking block 52 and the guide plate 3 are also arc-shaped structures.

[0044] In this embodiment, a first locating stop 62 is provided on a surface of the punch 6 close to the cavity 5. The first locating stop 62 surrounds the runner 61. A first locating stop 54 is correspondingly provided on the cavity 5. The first locating stop 62 and the first locating stop 54 can be engaged with each other to prevent the plasticized blank 2 from flowing out.

[0045] The punch 6 is further provided with a second positioning stop 63 on one side close to the cavity 5. The second positioning stop 63 is arranged around the punch core line hole 64. The cavity 5 is correspondingly provided with a second positioning stop 55. The second positioning stop 63 is engaged with the second positioning stop 55 to prevent the plasticized blank 2 from flowing out.

[0046] The punch 6 is provided with a punch positioning boss 65 on one side close to the die 7, and the die 7 is correspondingly provided with a die positioning stop 71. The punch positioning boss 65 and the die positioning stop 71 can be engaged with each other to prevent the plasticized blank 2 from flowing out.

[0047] In this embodiment, a sizing belt 72 is provided at the outlet end of the die 7. The length of the sizing belt 72 is preferably about 4 mm. The space between the sizing belt 72 and the core wire is used for the passage of the blank. The blank is coated on the core wire to form a coating layer. At this time, the difference between the cross-sectional size of the sizing belt and the cross-sectional size of the core wire is the thickness of the product coating layer. The cross-sectional size of the sizing belt determines the final size of the product. Specifically, Figure 12 As shown, the cross-sectional length of the sizing belt is A and the width is B. Figure 3 As shown, the cross-sectional length of the core wire is a and the width is b. The thickness of the coating layer on the upper and lower sides is (Bb) / 2, and the thickness on the left and right sides is (Aa) / 2. The cross-sectional length of the final overall product is A and the width is B. Furthermore, behind the sizing belt 72, the outlet end size of the die 7 gradually increases to prevent scratching of the product 9.

[0048] In this embodiment, if Figure 8 As shown, the cross-sectional length and width of the punch core wire hole 64 on the punch 6 are preferably 0.2 mm larger than the cross-sectional length and width of the core wire.

[0049] In this embodiment, the mold assembly can also be used to form pipes; in this case, Figure 11As shown, a solid rod portion is provided on the side of the male die 6 near the female die 7. The solid rod portion extends into the female die 7 and forms an annular forming cavity with the female die 7 for forming the tubular material. The solid rod portion is preferably a cylindrical rod, and the forming cavity is circular as a whole, for forming round tubular materials. Alternatively, a rectangular rod or a rod portion of another shape can be provided as needed, and the forming cavity can be configured to have the same shape to form rectangular tubular materials or other shaped tubular materials. Alternatively, the solid rod portion and the forming cavity can have different shapes to form tubular materials with different inner cross-sections than the overall cross-section.

[0050] This embodiment also provides an extrusion tool, including a compacting wheel 1, an extrusion wheel 10 and the cavity assembly as described above; wherein, the compacting wheel 1 and the extrusion wheel 10 are both mature existing technologies in this field, and will not be described in detail in this embodiment. Further, the extrusion tool also includes a scraper 11, such as Figure 2 As shown, the scraper 11 is located behind the cavity assembly and is arranged close to the extrusion wheel 10 to remove overflow from the wheel surface (outer cylindrical surface) of the extrusion wheel 10.

[0051] This embodiment also provides a continuous extruder, including the extrusion tooling as described above.

[0052] The working process in this embodiment is as follows:

[0053] The blank 2 is pressed into the extrusion wheel groove 101 by the compacting wheel 1 and firmly adhered to the extrusion wheel groove 101. The rotating extrusion wheel 10 drives the blank 2 to feed by friction. After the blank 2 touches the stop block 52, the stop block 52 forces the blank 2 to deform violently, change the flow direction and flow into the cavity flow channel 51. At this time, the blank 2 softens and produces plastic deformation, flows into the molding cavity formed by the die 7 and the punch 6, contacts the core wire 4 in the molding cavity, and finally forms the product 9 at the outlet of the die 7, and the blank 2 forms a coating layer on the surface of the core wire 4; alternatively, by changing the structure of the punch 6 and changing the end of the punch 6 close to the die 7 to a solid structure, pipes can be produced, realizing multiple uses of one machine.

[0054] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A cavity assembly, characterized in that: It includes a cavity and a mold assembly, and the mold assembly is arranged outside the cavity; wherein, the mold assembly includes a punch and a die, and a molding cavity is formed between the punch and the die, and a cavity flow channel is provided on the cavity, and the cavity flow channel is connected to the molding cavity for allowing the blank to enter the molding cavity for molding.

2. The cavity assembly according to claim 1, wherein: The cavity is also provided with a core wire passing hole, and the punch is correspondingly provided with a punch core wire hole. The core wire passing hole is connected with the punch core wire hole, and is used for the core wire to enter the forming cavity and form a coating layer on the surface of the core wire of the blank.

3. The cavity assembly according to claim 2, wherein: A punch flow channel is provided in the punch, the punch core line hole is located in the punch flow channel and is fixedly connected to the inner wall of the punch flow channel through a connecting bridge; the cavity flow channel is communicated with the punch flow channel.

4. The cavity assembly according to claim 3, wherein: There are two cavity flow channels, which are located on both sides of the core wire passing hole and are used to dock with the two extrusion wheel grooves on the extrusion wheel respectively; a stop block is provided behind the inlet end of the cavity flow channel, and the stop block can extend into the corresponding extrusion wheel groove to block the blank from entering the cavity flow channel; a guide plate is also provided at the front end of the cavity.

5. The cavity assembly according to claim 3, characterized in that: A first positioning stop of the punch is provided on one side of the punch close to the cavity, the first positioning stop of the punch is provided around the punch flow channel, and a first positioning stop of the cavity is correspondingly provided on the cavity, and the first positioning stop of the punch and the first positioning stop of the cavity can be engaged with each other; A second positioning stop of the punch is further provided on one side of the punch close to the cavity, the second positioning stop of the punch is arranged around the core wire hole of the punch, and a second positioning stop of the cavity is correspondingly provided on the cavity, and the second positioning stop of the punch and the second positioning stop of the cavity can be buckled; A punch positioning boss is provided on one side of the punch close to the die, and a die positioning stop is correspondingly provided on the die. The punch positioning boss and the die positioning stop can be engaged with each other.

6. The cavity assembly according to claim 1, wherein: The outlet end of the die is provided with a sizing belt, and behind the sizing belt, the size of the outlet end of the die gradually increases.

7. The cavity assembly according to claim 1, characterized in that: A solid rod portion is provided on one side of the male die close to the female die. The solid rod portion extends into the female die and forms an annular forming cavity with the female die for forming the pipe.

8. The cavity assembly according to claim 1, characterized in that: The mold assembly is fixed to the cavity by fastening screws, and a plurality of fastening screws are evenly arranged around the mold assembly.

9. An extrusion tool, characterized in that: The invention comprises a compacting wheel, an extrusion wheel and a cavity assembly as described in any one of claims 1 to 8.

10. A continuous extruder, characterized in that: Comprising the extrusion tool as claimed in claim 9.

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