Cloth pressing device for fabric cutting machine

Abstract

The utility model relates to a cloth pressing device for a cloth cutting machine. The cloth pressing device effectively solves the problem that local cloth of a cutting knife is prone to wrinkling. According to the technical scheme, a tool bit is fixed to the lower end of the tool bar, an outer shell is coaxially fixed to the tool bar, an inner cavity of the outer shell is in a cone shape with the large end facing downwards, the bottom of the inner cavity is open, a conical block is further coaxially installed on the tool bar, the outer wall of the conical block is in a cone shape consistent with the inner cavity of the outer shell, and the tool bar is sleeved with the conical block in a sliding mode. A pressure spring is mounted at the lower end of the conical block, and the outer wall of the conical block is attached to the inner cavity wall of the outer shell under the action of the pressure spring; an air inlet pipe communicated with the inner cavity is arranged on the outer shell, and a fan is arranged on the air inlet pipe; according to the utility model, the cloth near the cutter head is outwards flattened in all directions through 360-degree oblique airflow, so that the cloth at the cutter head position is prevented from being wrinkled when the cutter head is used for cutting, and the influence on the cutting precision and quality is avoided.

Description

Technical Field

[0001] The utility model relates to the field of fabric processing equipment, in particular to a cloth pressing device for a cloth cutting machine. Background Technique

[0002] A cloth cutting machine is a device for cutting cloth in a set shape. The cloth is laid flat on a workbench, and a cutter head cuts the cloth. In order to make the cloth flat, the cloth cutting machine is generally equipped with a flattening roller to flatten or stretch the cloth. For example, the utility model patent with the application number CN202022520892.1 presses one end of the cloth with a pressing plate, and the other end tightens and flattens the cloth through a plurality of smoothing wheels coaxially installed. Such equipment can flatten the whole cloth. However, when the cutting knife cuts the cloth, the cloth near the cutting knife is easily displaced and wrinkled under the action of the cutting knife, affecting the cutting accuracy and quality. Summary of the Invention

[0003] The utility model provides a cloth pressing device for a cloth cutting machine, aiming to solve the problem that the cloth at the local part of the cutting knife is easily wrinkled.

[0004] The technical solution it adopts includes a cutter bar. A cutter head is fixed at the lower end of the cutter bar. A housing is coaxially fixed on the cutter bar. The inner cavity of the housing is a cone with the large end facing downwards, and the bottom of the inner cavity is open. A conical block is also coaxially installed on the cutter bar. The outer wall of the conical block is a cone consistent with the inner cavity of the housing. The conical block is slidably sleeved on the cutter bar. A compression spring is installed at the lower end of the conical block. Under the action of the compression spring, the outer wall of the conical block fits with the inner cavity wall of the housing. An air inlet pipe communicating with the inner cavity is installed on the housing, and a fan is installed on the air inlet pipe.

[0005] A pressure equalizing cavity is arranged in the housing, the pressure equalizing cavity communicates with the upper end of the inner cavity, and the air inlet pipe communicates with the pressure equalizing cavity.

[0006] A sealing ring is installed between the conical block and the cutter bar.

[0007] A circular convex edge is fixed at the lower end of the cutter bar. The compression spring is sleeved on the cutter bar, and the lower end of the compression spring abuts against the convex edge.

[0008] The upper end of the cutter bar is connected with a hydraulic cylinder for driving the cutter bar to rise and fall.

[0009] The utility model flattens the cloth near the cutter head in all directions outward through a 360-degree oblique airflow, avoiding the wrinkling of the cloth at the cutter head position during cutting, and avoiding affecting the cutting accuracy and quality. Brief Description of the Drawings

[0010] Figure 1 It is the front view sectional view of the utility model when the fan is not started.

[0011] Figure 2 The front elevation cross-sectional view of the present utility model after the fan is started.

[0012] Figure 3 The perspective view of the present utility model.

[0013] Figure 4 The assembly drawing of the present utility model. Specific embodiments

[0014] Combined with the attached drawings, the present utility model includes a tool shank 1, a tool bit 2 is fixed at the lower end of the tool shank 1, a housing 3 is coaxially fixed on the tool shank 1, the inner cavity of the housing 3 is a cone with the large end facing downwards, and the bottom of the inner cavity is open. A tapered block 4 is also coaxially installed on the tool shank 1. The outer wall of the tapered block 4 is a cone consistent with the inner cavity of the housing 3. The tapered block 4 is slidably sleeved on the tool shank 1. A compression spring 5 is installed at the lower end of the tapered block 4. Under the action of the compression spring 5, the outer wall of the tapered block 4 fits against the inner cavity wall of the housing 3. An air inlet pipe 6 communicating with the inner cavity is installed on the housing 3. A fan 7 is installed on the air inlet pipe 6. The fan 7 blows air into the inner cavity. The air pressure pushes the tapered block 4 to move downward against the action of the compression spring 5. A conical sandwich is formed between the outer wall of the tapered block 4 and the inner cavity wall of the housing 3. The air blows downward from the sandwich to the fabric around the tool bit 2, flattening the fabric outward to avoid fabric wrinkles when the tool bit 2 cuts.

[0015] A pressure equalizing chamber 8 is provided in the housing 3. The pressure equalizing chamber 8 communicates with the upper end of the inner cavity. The air inlet pipe 6 communicates with the pressure equalizing chamber 8. After the fan 7 is started, under the action of the compression spring 5, the pressure in the pressure equalizing chamber 8 increases, and then pushes the tapered block 4 to move downward. The pressure equalizing chamber 8 can make the air pressure evenly distributed in the circumference, so that the air blown out from the sandwich is uniform in all directions.

[0016] A sealing ring 9 is installed between the tapered block 4 and the tool shank 1 to avoid air leakage.

[0017] A circular flange 10 is fixed at the lower end of the tool shank 1. The compression spring 5 is sleeved on the tool shank 1, and the lower end of the compression spring 5 abuts against the flange 10.

[0018] A hydraulic cylinder 11 is connected to the upper end of the tool shank 1 for driving the upward and downward movement of the tool shank 1.

[0019] When the utility model is in use, after the fabric is laid flat on the workbench, the hydraulic cylinder 11 drives the cutter bar 1 to descend, and the cutter head 2 cuts the fabric. When the cutter head 2 contacts the fabric, the lower end of the outer housing 3 is about 3 to 5 millimeters higher than the fabric. The fan 7 is started to inflate the pressure equalizing chamber 8. After the air pressure rises, it pushes the conical block 4 to move downward against the action of the compression spring 5. The conical block 4 is separated from the outer housing 3, and a conical gap is formed between the outer wall of the conical block 4 and the inner cavity wall of the outer housing 3. The air flow in the pressure equalizing chamber 8 is blown downward through the gap. Since the direction of the air flow blown out from the gap is downward and outward, when the air flow blows to the fabric surface, it will flatten the fabric around the cutter head 2 outward, avoiding local wrinkles of the fabric during the cutting process of the cutter head 2.

[0020] The utility model can form a 360-degree annular and outward-flowing air flow around the cutter head 2, which can flatten the fabric near the cutter head 2 in all directions outward, avoid wrinkles of the fabric at the position of the cutter head 2 during cutting by the cutter head 2, and avoid affecting the cutting accuracy and quality.

Claims

1. A cloth pressing device for a cloth cutting machine, comprising a knife bar (1), a knife head (2) being fixed at the lower end of the knife bar (1), characterized in that: An outer shell (3) is coaxially fixed on the knife rod (1), the inner cavity of the outer shell (3) is a cone with the large end facing downward and the bottom of the inner cavity is open. A conical block (4) is also coaxially mounted on the knife rod (1), the outer wall of the conical block (4) is a cone that is consistent with the inner cavity of the outer shell (3), the conical block (4) is slidably mounted on the knife rod (1), a compression spring (5) is installed at the lower end of the conical block (4), under the action of the compression spring (5), the outer wall of the conical block (4) is in contact with the inner cavity wall of the outer shell (3); an air inlet pipe (6) connected to the inner cavity is installed on the outer shell (3), and a fan (7) is installed on the air inlet pipe (6).

2. A cloth pressing device for a cloth cutting machine according to claim 1, characterized in that: A pressure equalizing chamber (8) is provided in the outer shell (3), the pressure equalizing chamber (8) is communicated with the upper end of the inner chamber, and the air inlet pipe (6) is communicated with the pressure equalizing chamber (8).

3. A cloth pressing device for a cloth cutting machine according to claim 1, characterized in that: A sealing ring (9) is installed between the conical block (4) and the knife rod (1).

4. A cloth pressing device for a cloth cutting machine according to claim 1, characterized in that: A circular convex edge (10) is fixed to the lower end of the knife rod (1), and the compression spring (5) is sleeved on the knife rod (1), with the lower end of the compression spring (5) resting on the convex edge (10).

5. The cloth pressing device for a cloth cutting machine according to claim 1, characterized in that: The upper end of the knife rod (1) is connected to a hydraulic cylinder (11) for driving the knife rod (1) to rise and fall.

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