Pelletizing mold for forced feeding and wriggling forming

Abstract

The utility model discloses a forced feeding and wriggling forming granulation mold, and belongs to the technical field of feed granulation forming machinery. Comprising compression roller assemblies and a mold disc assembly, the compression roller assemblies are installed on the mold disc assembly, the minimum installation gap delta ranges from 0 mm to 5 mm, a plurality of mold holes are formed in the mold disc assembly, the multiple compression roller assemblies are evenly distributed in the circumferential direction of the upper surface of the mold disc assembly, and the axes of compression roller shafts of the compression roller assemblies are all perpendicular to the axis of the mold disc assembly. A plurality of rows of protrusions are axially arranged on the periphery of a compression roller shell of a compression roller shell assembly in the compression roller assembly, and every two adjacent rows of protrusions are arranged in a staggered mode. Forced feed granulation of feed can be realized, the feed can smoothly enter the die hole, stress relaxation of the feed in the die hole is facilitated by wriggling, friction force between the feed in the die hole and the wall surface of the die hole is reduced, and the problem that a current feed granulator is easy to block is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of feed pelletizing and molding machinery, and in particular relates to a pelletizing die for forced feeding and creeping molding. Background Art

[0002] Pelletizing can improve the palatability of feed, increase animal feed intake, digestibility and daily weight gain, and facilitate transportation and storage, effectively alleviating problems such as seasonality and annual imbalance in feed supply and demand. It is an inevitable development trend of feed processing and a key technology for the development of intensive, large-scale and grain-saving animal husbandry. Die roller extrusion is the most commonly used feed pelletizing and forming device. The existing die roller extrusion feed pelletizing and forming machine has serious blockage, especially for mixed feed containing wet and sticky components, which seriously affects the pelletizing efficiency of the feed. Summary of the invention

[0003] In view of the technical problem that the feed pelletizing process is prone to blockage, the present invention provides a pelletizing die with forced feeding and peristaltic forming, which prevents blockage of the feed pelletizing process by the mutual cooperation of the anti-blocking pelletizing roller and the die plate, thereby improving the pelletizing efficiency of the feed.

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] The invention discloses a forced feeding and creeping forming granulation die, comprising a pressure roller assembly and a die plate assembly, wherein the pressure roller assembly is mounted on the die plate assembly, the minimum mounting gap δ between the pressure rollers of the die plate assembly B and the pressure roller assembly A is 0-5 mm, a plurality of die holes are opened on the die plate assembly, a plurality of pressure roller assemblies are evenly distributed along the circumference of the upper surface of the die plate assembly, the axis of the pressure roller shaft of the pressure roller assembly is perpendicular to the axis of the die plate assembly, and a plurality of rows of protrusions are axially arranged on the outer periphery of the pressure roller shell of the pressure roller shell assembly in the pressure roller assembly.

[0006] Furthermore, the pressure roller shell assembly is provided with multiple rows of protrusions on the outer circumference of the pressure roller shell, and the protrusions are composed of spherical protrusions and curved protrusions connected together. The spherical protrusion is a hemispherical surface with a radius R of 5-15mm. The conducting wire of the curved protrusion is an arc line formed by a point on the circumferential surface of the pressure roller shell between the outermost end point of the hemispherical arc line and the adjacent spherical protrusion in the circumferential direction. The generatrix of the curved protrusion is a gradually decreasing hemispherical arc line of the spherical protrusion, that is, the cross-section of the curved protrusion is a hemispherical arc of the spherical protrusion sheared by different shear surfaces, and the hemispherical arc gradually decreases from the spherical protrusion to the end of the pressure roller shell.

[0007] Furthermore, the angle θ between the line connecting the center lines of the axially adjacent spherical protrusions on the outer circumference of the roller shell and the axis of the roller shell is 0-60°.

[0008] Furthermore, the roller shafts of the plurality of roller assemblies are connected as a whole, and each of the roller assemblies comprises a roller shaft, a roller shell assembly, a bearing, a retaining ring, a gasket, a bearing cover and a nut. The roller shell assembly is sleeved on the roller shaft through the bearing, and a groove for accommodating the retaining ring is opened on the inner circumferential surface of the roller shell end at the protruding end of the roller shaft, and the retaining ring is placed in the groove. A gasket, a bearing cover and a nut are sequentially sleeved on the protruding end of the roller shaft, and are fixedly connected to the roller shaft through threads through the nut.

[0009] Furthermore, the mold holes on the mold plate assembly include transitionally connected smooth curved surfaces, creeping convex surfaces, creeping concave surfaces and straight holes from top to bottom; a coordinate system xOy is established with the mold hole center line y and the mold plate assembly surface horizontal line x, and the generatrix of the smooth curved surface is a part of the curve of the expression y=ax+b+c in the fourth quadrant, wherein a, b, and c are all constants, and a>1, c<0.

[0010] Furthermore, the peristaltic convex surface is composed of 1-2 circular protrusions, and the peristaltic concave surface is composed of 1-2 concave rings, and the peristaltic convex surface and the peristaltic concave surface are arranged at intervals; the diameter D1 at the largest hole of the smooth curved surface is 1.1-1.5 times the diameter D4 of the straight hole; the diameter D2 at the smallest hole of the peristaltic convex surface is 0.8-1 times the diameter D4 of the straight hole; the maximum diameter D3 of the peristaltic concave surface is 1.1-1.4 times the diameter D4 of the straight hole.

[0011] Furthermore, the height H1 of the smooth curved surface is 0.5-1.5 times the diameter D4 of the straight hole; the height H2 of the straight hole is 0.5-1 times the diameter D4 of the straight hole.

[0012] The beneficial effects of the present invention are:

[0013] 1. The present invention arranges a roller assembly on the die plate assembly, and a protrusion is added to the roller shell of the roller assembly. The protrusion is composed of a spherical protrusion and a curved protrusion connected to form a pushing effect on the feed, preventing the roller and the material from slipping, avoiding material obstruction, and forcing the feed to be fed, thereby improving the pelletizing efficiency of the feed.

[0014] 2. The die hole of the die plate assembly in the present invention is composed of a smooth curved surface, a creeping convex surface, a creeping concave surface and a straight hole. The feed can smoothly enter the forming hole. At the same time, the feed creeps and flows into shape under the extrusion action, which is beneficial to the stress relaxation of the feed in the die hole, reduces the friction with the hole wall, and effectively prevents the die hole from being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 The figure is a schematic diagram of the assembly of the pressure roller assembly.

[0017] Figure 3 It is a structural schematic diagram of the pressure roller shell assembly.

[0018] Figure 4 It is a structural schematic diagram of the mold plate assembly.

[0019] Figure 5 A cross-sectional view of the mold plate assembly.

[0020] In the figure: A. Roller assembly B. Die plate assembly C. Nut D. Bearing cover E. Washer F. Retaining ring G. Bearing H. Roller shell assembly I. Roller shaft 1. Spherical protrusion 2. Curved protrusion 3. Roller shell 4. Mounting threaded hole 5. Keyway hole 6. Die hole 7. Smooth curved surface 8. Peristaltic convex surface 9. Peristaltic concave surface 10. Straight hole. DETAILED DESCRIPTION

[0021] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0022] Embodiment 1: The present invention provides a forced feeding and peristaltic forming granulation die for feed granulation, comprising a roller assembly A and a die plate assembly B, wherein the roller assembly A is mounted on the die plate assembly B, and the minimum installation gap between the rollers of the die plate assembly B and the roller assembly A is δ=0-5mm, and in this embodiment δ=5mm. A plurality of die holes 6 are provided on the die plate assembly B, and a plurality of roller assemblies A are evenly distributed circumferentially along the upper surface of the die plate assembly B, and in this embodiment there are three roller holes. The axis of the roller shaft I of the roller assembly A is perpendicular to the axis of the die plate assembly B, and a plurality of rows of protrusions are axially arranged on the outer periphery of the roller shell 3 of the roller shell assembly H in the roller assembly A.

[0023] The roller shell assembly H described in this example is a roller shell 3 with multiple rows of protrusions arranged on the periphery of the roller shell 3. The protrusions are formed by connecting a spherical protrusion 1 and a curved protrusion 2. The spherical protrusion 1 is a hemispherical surface with a radius R of 5-15mm. In this example, the radius R is 10mm. The guide wire of the curved protrusion 2 is an arc line formed by a point on the circumferential surface of the roller shell 3 between the outermost end point of the hemispherical arc line and the spherical protrusion 1 adjacent to the circumferential direction. The generatrix of the curved protrusion 2 is a gradually decreasing hemispherical arc line of the spherical protrusion 1, that is, the cross section of the curved protrusion 2 is a hemispherical arc of the spherical protrusion 1 sheared by different shearing surfaces, and the hemispherical arc gradually decreases from the spherical protrusion 1 to the end of the roller shell 3. The protrusion has a pushing effect on the feed, and can force the feed to be fed, prevent the roller and the material from slipping, and avoid material obstruction.

[0024] The angle θ between the line connecting the center lines of the axially adjacent spherical protrusions 1 on the outer circumference of the roller shell 3 and the axis of the roller shell 3 is 0-60°, and in this example θ is 30°.

[0025] In this example, the roller shafts I of the three roller assemblies A are connected as a whole and are fixed on the granulator housing through each roller shaft I. Each roller assembly A includes a roller shaft I, a roller shell assembly H, a bearing G, a retaining ring F, a gasket E, a bearing cover D and a nut C. The roller shell assembly H is sleeved on the roller shaft I through the bearing G. A groove for accommodating the retaining ring F is opened on the inner circumferential surface of the roller shell 3 at the protruding end of the roller shaft I. The retaining ring F is placed in the groove. The gasket E, the bearing cover D and the nut C are sequentially sleeved on the protruding end of the roller shaft I, and the nut C is fixedly connected to the roller shaft I through threads.

[0026] The die hole 6 opened on the die plate assembly B includes a transitionally connected smooth curved surface 7, a creeping convex surface 8, a creeping concave surface 9 and a straight hole 10 from top to bottom; a coordinate system xOy is established with the center line y of the die hole 6 and the horizontal line x of the surface of the die plate assembly B, and the generatrix of the smooth curved surface 7 is a part of the curve of the expression y=ax+b+c in the fourth quadrant, wherein a, b, and c are all constants, and a>1, c<0.

[0027] In this example, the creeping convex surface 8 is composed of two circular protrusions, and the creeping concave surface 9 is composed of two concave rings. The creeping convex surface 8 and the creeping concave surface 9 are arranged at intervals, wherein the creeping convex surface 8 is connected to the smooth curved surface 7, and the creeping concave surface 9 is connected to the straight hole 10, forming a Figure 5 The die hole 6 shown in the figure is connected in sequence by the smooth curved surface 7, the creeping convex surface 8, the creeping concave surface 9, the creeping convex surface 8, the creeping concave surface 9, and the straight hole 10. The diameter D1 of the largest hole of the smooth curved surface 7 is 1.1 times the diameter D4 of the straight hole 10; the diameter D2 of the smallest hole of the creeping convex surface 8 is 0.8 times the diameter D4 of the straight hole 10; the maximum diameter D3 of the creeping concave surface 9 is 1.1 times the diameter D4 of the straight hole 10. The height H1 of the smooth curved surface 7 is 0.5 times the diameter D4 of the straight hole 10; the height H2 of the straight hole is 0.5 times the diameter D4 of the straight hole 10. The feed can smoothly enter the forming die hole, and the feed is creepingly formed under multiple extrusions, which is conducive to the relaxation of the stress of the feed in the die hole, reduces the friction with the hole wall, and prevents the die hole from being blocked.

[0028] The die plate assembly B is also provided with a keyway hole 5 and mounting threaded holes 4 on both sides of the keyway hole 5. The keyway hole 5 is a hole with a keyway, which is connected to the pelletizer body through the keyway hole 5. The mounting threaded holes 4 are used to remove the die plate through connecting bolts.

[0029] When in use, the present invention is installed in a granulator housing (prior art), the pressure roller assembly A is fixed on the granulator housing through each pressure roller shaft I, the die plate assembly B is connected to the granulator body (prior art) through the keyway hole 5, the die plate assembly B is driven to rotate by the granulator body, and the pressure roller housing 3 is rotated around the pressure roller shaft I through the friction between the material and the mold, so that the material falling between the pressure roller assembly A and the die plate assembly B is squeezed into the die hole 6 of the die plate assembly B under the extrusion action of the pressure roller housing 3, the material is peristaltically flowed and formed in the die hole 6, and the prepared material particles are discharged from the bottom of the die hole 6.

[0030] Embodiment 2: This embodiment is different from Embodiment 1 in that: in this embodiment, the minimum installation gap δ between the pressure rollers of the mold plate assembly B and the pressure roller assembly A is 0 mm; the hemispherical radius R of the spherical protrusion 1 is 5 mm; and the angle θ between the line connecting the center lines of the axially adjacent spherical protrusions 1 on the outer periphery of the pressure roller shell 3 and the axis of the pressure roller shell 3 is 0°.

[0031] In this example, the creeping convex surface 8 is composed of a circular protrusion, and the creeping concave surface 9 is composed of a concave ring. The diameter D2 of the smallest hole of the creeping convex surface 8 is equal to the diameter D4 of the straight hole 10; the diameter D1 of the largest hole of the smooth curved surface 7 is 1.5 times the diameter D4 of the straight hole 10; the maximum diameter D3 of the creeping concave surface 9 is 1.4 times the diameter D4 of the straight hole 10. The height H1 of the smooth curved surface 7 is 1.5 times the diameter D4 of the straight hole 10; the height H2 of the straight hole 10 is 1 times the diameter D4 of the straight hole 10.

[0032] Embodiment 3: This embodiment is different from Embodiment 1 in that: the minimum installation gap δ between the pressure rollers of the die plate assembly B and the pressure roller assembly A in this embodiment is 3 mm; the hemispherical radius R of the spherical protrusion 1 is 15 mm; and the angle θ between the line connecting the center lines of the axially adjacent spherical protrusions 1 on the outer periphery of the pressure roller shell 3 and the axis of the pressure roller shell 3 is 60°.

[0033] In this example, the diameter D1 of the largest hole of the smooth curved surface 7 is 1.3 times the diameter D4 of the straight hole 10; the diameter D2 of the smallest hole of the creeping convex surface 8 is 0.9 times the diameter D4 of the straight hole 10; the maximum diameter D3 of the creeping concave surface 9 is 1.2 times the diameter D4 of the straight hole 10. The height H1 of the smooth curved surface 7 is 1.1 times the diameter D4 of the straight hole 10; the height H2 of the straight hole 10 is 0.8 times the diameter D4 of the straight hole 10.

[0034] The components not described in detail in this application are all existing conventional technologies and will not be described in detail here.

[0035] It can be understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that the present invention can still be modified or replaced by equivalents to achieve the same technical effects; as long as the use requirements are met, they are within the protection scope of the present invention.

Claims

1. A granulation die with forced feeding and creeping forming, characterized in that: It includes a pressure roller assembly and a die plate assembly, the pressure roller assembly is installed on the die plate assembly, the minimum installation gap δ between the pressure rollers of the die plate assembly B and the pressure roller assembly A is 0-5mm, a plurality of die holes are opened on the die plate assembly, a plurality of pressure roller assemblies are evenly distributed along the circumference of the upper surface of the die plate assembly, the axis of the pressure roller shaft of the pressure roller assembly is perpendicular to the axis of the die plate assembly, and a plurality of rows of protrusions are axially arranged on the outer periphery of the pressure roller shell of the pressure roller shell assembly in the pressure roller assembly.

2. The granulation die with forced feeding and creeping forming according to claim 1, characterized in that: The roller shell assembly is provided with multiple rows of protrusions on the outer circumference of the roller shell, and the protrusions are composed of spherical protrusions and curved protrusions. The spherical protrusion is a hemispherical surface with a radius R of 5-15mm. The conducting wire of the curved protrusion is an arc line formed by a point on the circumferential surface of the roller shell between the outermost end point of the hemispherical arc line and the adjacent spherical protrusion in the circumferential direction. The generatrix of the curved protrusion is a gradually decreasing hemispherical arc line of the spherical protrusion, that is, the cross-section of the curved protrusion is a hemispherical arc of the spherical protrusion sheared by different shear planes, and the hemispherical arc gradually decreases from the spherical protrusion to the end of the roller shell.

3. The granulation die with forced feeding and creeping forming according to claim 1, characterized in that: The angle θ between the line connecting the center lines of the spherical protrusions adjacent to each other in the axial direction on the outer circumference of the roller shell and the axis of the roller shell is 0-60°.

4. The granulation die with forced feeding and creeping forming according to claim 1, characterized in that: The roller shafts of the multiple roller assemblies are connected as a whole, and each roller assembly includes a roller shaft, a roller shell assembly, a bearing, a retaining ring, a gasket, a bearing cover and a nut. The roller shell assembly is sleeved on the roller shaft through the bearing, and a groove for accommodating the retaining ring is opened on the inner circumferential surface of the roller shell end at the protruding end of the roller shaft. The retaining ring is placed in the groove, and a gasket, a bearing cover and a nut are sequentially sleeved on the protruding end of the roller shaft, and are fixedly connected to the roller shaft through threads through the nut.

5. The granulation die with forced feeding and creeping forming according to claim 1, characterized in that: The die holes on the die plate assembly include a transitionally connected smooth curved surface, a creeping convex surface, a creeping concave surface and a straight hole from top to bottom; a coordinate system xOy is established with the die hole center line y and the die plate assembly surface horizontal line x, and the generatrix of the smooth curved surface is a part of the curve of the expression y=ax+b+c in the fourth quadrant, wherein a, b, and c are all constants, and a>1, c<0.

6. The granulation die with forced feeding and creeping forming according to claim 5, characterized in that: The peristaltic convex surface is composed of 1-2 circular ring protrusions, and the peristaltic concave surface is composed of 1-2 concave rings. The peristaltic convex surface and the peristaltic concave surface are arranged at intervals respectively; the diameter D1 at the largest hole of the smooth curved surface is 1.1-1.5 times the diameter D4 of the straight hole; the diameter D2 at the smallest hole of the peristaltic convex surface is 0.8-1 times the diameter D4 of the straight hole; the maximum diameter D3 of the peristaltic concave surface is 1.1-1.4 times the diameter D4 of the straight hole.

7. The granulation die with forced feeding and creeping forming according to claim 5 or 6, characterized in that: The height H1 of the smooth curved surface is 0.5-1.5 times the diameter D4 of the straight hole; the height H2 of the straight hole is 0.5-1 times the diameter D4 of the straight hole.

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