A method for flanging a composite bowl

Abstract

The application discloses a flanging forming method of a composite skin bowl, and comprises the following steps: realizing the bending of the top of the outer framework of the composite skin bowl to the horizontal state through the flanging forming die to tightly press the top of the inner framework, and realizing the flanging and rolling process. By using the upper die plate with different inclined contact surfaces in the flanging forming die, the top of the outer framework is gradually bent to the horizontal state through multiple contact and pressure to tightly press the top of the inner framework, so that the problem that the top of the erected outer framework cannot be bent to the horizontal state to tightly press the top of the inner framework in the prior art is solved.

Description

Technical Field

[0001] This invention relates to a method for forming the rim of a composite leather bowl, belonging to the field of composite leather bowl forming and processing technology. Background Technology

[0002] For the composite cup 7 composed of the outer skeleton 71, inner skeleton 72, sealing ring 73, and rubber gasket 74, such as Figure 6 As shown, after assembly, the top of the metal outer frame 71 needs to be bent and flanged to press tightly against the top of the inner frame 72. Since the outer frame 71 is made of metal, force needs to be applied through a mold.

[0003] Existing technologies for bending and flanging the top of the outer frame 71 include, for example, a mold for combined oil seal assembly processing disclosed in Chinese Patent Publication No. CN212764858U, which uses an inner inclined surface to bend and flang the top of the outer frame 71. However, it cannot bend and flang the top of the vertical outer frame 71 to a horizontal state to tightly press against the top of the inner frame 72. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a method for forming the flange of a composite leather bowl.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides a method for forming the rim of a composite leather bowl, comprising:

[0007] The outer frame of the composite leather cup is bent to a horizontal state by multiple stampings using a flanging forming mold, which then tightly presses against the top of the inner frame.

[0008] The flanging and rolling process is as follows:

[0009] First stamping: On the top surface of the composite leather cup ejector block, the upper template with a 40° relative angle between the contact guide surfaces is used to install the pre-press block onto the lower template via positioning pins, causing the ejector block to push upwards. The top of the outer frame makes its first contact with the inclined contact guide surfaces, resulting in a gradual bending under pressure. After the first stamping, the upper template is replaced.

[0010] Second stamping: On the top surface of the composite cup ejector block, the upper template with the contact guide surfaces at a 90° angle to each other, along with the pre-press block, is installed onto the lower template via positioning pins, causing the ejector block to rise. The top of the outer frame makes a second contact with the inclined contact guide surfaces, resulting in a gradual bending under pressure. After the second stamping, the upper template is replaced.

[0011] The third stamping: On the top surface of the composite cup ejector block, the upper template with a 140° relative angle between the contact guide surfaces is used to install the pre-press block onto the lower template via positioning pins, causing the ejector block to push upwards. The top of the outer frame makes a third contact with the inclined contact guide surface, gradually bending under pressure, thus achieving the third stamping and replacing the upper template.

[0012] Fourth stamping: On the top surface of the ejector block, the composite cup is installed on the lower template using a positioning pin with the contact guide surfaces at an angle of 180° or 0° to each other. This causes the ejector block to rise, and the top of the outer frame makes a fourth contact with the inclined contact guide surfaces, gradually bending under pressure. At this time, the top of the outer frame bends and flips to a horizontal state to tightly press against the top of the inner frame.

[0013] The flanging forming mold includes:

[0014] The lower template has through holes inside for installing the ejector block;

[0015] Ejector block, the ejector block is installed in the through hole in the middle of the lower template;

[0016] The upper template is installed on the lower template.

[0017] A pre-compression block, which restricts upward movement, is installed on the upper template. The bottom edge of the through hole of the upper template is provided with an inclined contact guide surface.

[0018] The angle between the contact guide surface and the axis of the through hole in the middle of the upper template is 0°~90°, so that the relative angle between the contact guide surfaces is 0°~180°.

[0019] The contact guide surfaces are at relative angles of 40°, 90°, 140°, and 180°, resulting in four types of upper templates. When the contact guide surfaces of the upper template are at relative angles of 180°, no pre-compression block is installed.

[0020] The lower template has a positioning hole in which a positioning pin is installed, and the upper template has a positioning hole for installing the positioning pin; the positioning pin passes through the positioning hole in the lower template and the positioning hole in the upper template.

[0021] The top of the positioning pin is lower than the top surface of the upper template by a distance.

[0022] The internal through hole of the lower template is in the shape of a conical step, and there is a gap between the bottom of the ejector block and the inner wall of the bottom of the through hole in the middle of the lower template.

[0023] The upper template has a stepped hole in the middle for installing a stepped pre-compression block to restrict its upward movement.

[0024] The beneficial effects of this invention are as follows: by using an upper template with different inclined contact guide surfaces in the flanging forming mold, the top of the outer frame is repeatedly contacted and pressed to gradually bend to a horizontal state to tightly press against the top of the inner frame, which solves the problem that the prior art cannot bend and flanged the top of the vertical outer frame to a horizontal state to tightly press against the top of the inner frame. Attached Figure Description

[0025] Figure 1 This is a schematic front cross-sectional view of the present invention;

[0026] Figure 2 This is a schematic diagram showing that the contact guide surfaces of the template in this invention have a relative angle of 40°.

[0027] Figure 3 This is a schematic diagram showing the contact guide surfaces of the template in this invention at a relative angle of 90°.

[0028] Figure 4 This is a schematic diagram showing the contact guide surfaces of the template in this invention at a relative angle of 140°.

[0029] Figure 5 This is a schematic diagram of the contact guide surfaces of the template in this invention at a relative angle of 180° or 0°;

[0030] Figure 6 This is a schematic diagram of the front cross-section of a composite leather bowl;

[0031] In the diagram: 1-lower template; 2-ejection block; 3-positioning pin; 4-pre-compression block; 5-upper template; 51-contact guide surface; 7-composite cup; 71-outer skeleton; 72-inner skeleton; 73-sealing ring; 74-rubber gasket. Detailed Implementation

[0032] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0033] like Figures 1 to 5 As shown.

[0034] This application discloses a method for forming the rim of a composite leather bowl, comprising:

[0035] Using a flanging forming mold as a tool, the top of the outer skeleton 71 of the composite leather cup 7 is repeatedly stamped and bent to a horizontal state to tightly press against the top of the inner skeleton 72.

[0036] The flanging forming mold includes: a lower template 1 with a through hole inside, and a tapered step-shaped through hole in the middle of the lower template 1 for installing the ejector block 2;

[0037] Ejector block 2 is installed and secured below the top of the through hole in the middle of the lower template 1. There is a gap space 21 between the bottom of ejector block 2 and the inner wall of the bottom of the through hole in the middle of the lower template 1, which facilitates the ejector block 2 to be pushed upward and ejected from the mold later. Composite leather cup 7 is installed on the top surface of ejector block 2.

[0038] An upper template 5 is installed on the lower template 1. The upper template 5 has a stepped hole in its middle for installing a stepped pre-compression block 4. The bottom edge of the through hole in the upper template 5 has an inclined contact guide surface 51. The angle between the contact guide surface 51 and the axis of the through hole in the middle of the upper template 5 is 0°~90°, so that the relative angle between the contact guide surfaces 51 and each other is 0°~180°, preferably 40°, 90°, 140°, or 180°. Therefore, there are four types of upper templates 5. When the relative angle between the contact guide surfaces 51 of the upper template 5 is 180°, the pre-compression block 4 does not need to be installed.

[0039] The lower template 1 has a positioning hole in which a positioning pin 3 is installed, and the upper template 5 has a positioning hole for installing the positioning pin 3. The positioning pin 3 passes through the positioning hole of the lower template 1 and the positioning hole of the upper template 5. The top of the positioning pin 3 is lower than the top surface of the upper template 5 by a distance. When the ejector block 2 is pushed up, the positioning pin 3 will not protrude from the top surface of the upper template 5.

[0040] The present application discloses a method for forming the rim of a composite leather bowl, wherein the rim-flipping and rolling process is as follows:

[0041] First stamping: The composite cup 7 is on the top surface of the ejector block 2. The upper template 5, with the contact guide surface 51 at a relative angle of 40°, carries the pre-pressing block 4 and is installed on the lower template 1 through the positioning pin 3, so that the ejector block 2 is pushed up. The top of the outer frame 71 makes the first contact with the inclined contact guide surface 51 and gradually bends under pressure. After the first stamping, the upper template 5 is replaced.

[0042] Second stamping: The composite cup 7 is on the top surface of the ejector block 2. The upper template 5, with the contact guide surface 51 at a relative angle of 90°, carries the pre-pressing block 4 and is installed on the lower template 1 through the positioning pin 3, so that the ejector block 2 is pushed up. The top of the outer frame 71 makes a second contact with the inclined contact guide surface 51 and gradually bends under pressure. After the second stamping, the upper template 5 is replaced.

[0043] Third stamping: The composite cup 7 is on the top surface of the ejector block 2. The upper template 5, with the pre-pressing block 4, is installed on the lower template 1 by the positioning pin 3 using the contact guide surface 51 at a relative angle of 140°. This causes the ejector block 2 to push up. The top of the outer frame 71 makes a third contact with the inclined contact guide surface 51 and gradually bends, thus achieving the third stamping to replace the upper template 5.

[0044] Fourth stamping: The composite cup 7 is on the top surface of the ejector block 2. The upper template 5, with the contact guide surfaces 51 at a relative angle of 180° (i.e., 0°), is installed on the lower template 1 through the positioning pin 3, so that the ejector block 2 is pushed up. The top of the outer frame 71 makes a fourth contact with the inclined contact guide surface 51 and gradually bends. At this time, the top of the outer frame 71 bends and flips to a horizontal state to tightly press against the top of the inner frame 72.

[0045] By using the upper template 5 with different inclined contact guide surfaces 51 in the flanging forming mold, the top of the outer frame 71 is repeatedly contacted and pressed to gradually bend to a horizontal state to tightly press against the top of the inner frame 72, which solves the problem that the existing technology cannot bend and flang the top of the vertical outer frame 71 to a horizontal state to tightly press against the top of the inner frame 72.

Claims

1. A method for forming the rim of a composite leather bowl, characterized in that, include: The outer frame (71) of the composite leather bowl (7) is bent to a horizontal state by multiple stampings through the flanging forming mold to tightly press the top of the inner frame (72). The flanging forming mold includes: The lower template (1) has through holes inside for installing the ejector block (2); Ejector block (2) is installed in the through hole in the middle of the lower template (1); Upper template (5) is installed on lower template (1); Pre-compression block (4), a pre-compression block (4) installed on the upper template (5) to restrict upward movement, wherein the bottom edge of the through hole of the upper template (5) is provided with an inclined contact guide surface (51); The angle between the contact guide surface (51) and the axis of the through hole in the middle of the upper template (5) is 0°~90°, so that the relative angle between the contact guide surfaces (51) is 0°~180°.

2. The method for forming the flange of a composite leather bowl as described in claim 1, characterized in that, The flanging and rolling process is as follows: First stamping: The composite leather cup (7) is on the top surface of the ejector block (2). The upper template (5) with the contact guide surface (51) at a relative angle of 40° is used to install the pre-press block (4) onto the lower template (1) through the positioning pin (3), so that the ejector block (2) is pushed up. The top of the outer frame (71) makes the first contact with the inclined contact guide surface (51) and gradually bends under pressure. After the first stamping, the upper template (5) is replaced. Second stamping: The composite cup (7) is on the top surface of the ejector block (2). The upper template (5) with the contact guide surface (51) at a relative angle of 90° to each other, along with the pre-pressing block (4), is installed on the lower template (1) through the positioning pin (3), so that the ejector block (2) is pushed up. The top of the outer frame (71) makes a second contact with the inclined contact guide surface (51) and gradually bends under pressure. After the second stamping, the upper template (5) is replaced. Third stamping: The composite cup (7) is on the top surface of the ejector block (2). The upper template (5) with the contact guide surface (51) at a relative angle of 140° is used to carry the pre-press block (4) and is installed on the lower template (1) through the positioning pin (3), so that the ejector block (2) is pushed up. The top of the outer frame (71) makes a third contact with the inclined contact guide surface (51) and gradually bends, realizing the third stamping to replace the upper template (5). Fourth stamping: The composite cup (7) is on the top surface of the ejector block (2). The upper template (5) with the contact guide surface (51) at an angle of 180° or 0° relative to each other is installed on the lower template (1) by the positioning pin (3), so that the ejector block (2) is pushed up. The top of the outer frame (71) and the inclined contact guide surface (51) make a fourth contact and gradually bend. At this time, the top of the outer frame (71) bends and flips to a horizontal state to tightly press the top of the inner frame (72).

3. The method for forming the flange of a composite leather bowl as described in claim 1, characterized in that: The contact guide surfaces (51) are at relative angles of 40°, 90°, 140° and 180°, so that the upper template (5) has four types. When the contact guide surfaces (51) of the upper template (5) are at relative angles of 180°, the pre-compression block (4) is not installed.

4. The method for forming the flange of a composite leather bowl as described in claim 1, characterized in that: The lower template (1) has a positioning hole in which a positioning pin (3) is installed, and the upper template (5) has a positioning hole for installing the positioning pin (3); the positioning pin (3) passes through the positioning hole of the lower template (1) and the positioning hole of the upper template (5).

5. The method for forming the flange of a composite leather bowl as described in claim 4, characterized in that: The top of the positioning pin (3) is lower than the top surface of the upper template (5) by a distance.

6. The method for forming the flange of a composite leather bowl as described in claim 1, characterized in that: The internal through hole of the lower template (1) is in the shape of a conical step, and there is a gap space (21) between the bottom of the ejector block (2) and the inner wall of the bottom of the through hole in the middle of the lower template (1).

7. The method for forming the flange of a composite leather bowl as described in claim 1, characterized in that: The upper template (5) has a stepped hole in the middle for installing a stepped pre-compression block (4) to restrict its upward movement.

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