CN217434399U

CN217434399U - Trapezoidal slitting device of EVA

Info

Publication number: CN217434399U
Application number: CN202221346808.1U
Authority: CN
Inventors: 张东琴; 陈先锋; 衡先梅; 王岩; 陈兵; 傅羿宁
Original assignee: Longyang Electronics Kunshan Co ltd
Current assignee: Longyang Electronics Kunshan Co ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-09-16
Anticipated expiration: 2032-05-31

Abstract

The utility model discloses an EVA ladder-shaped slitting device, belonging to the technical field of foam slitting, the device comprises a die, wherein a through hole for EVA to pass through is arranged in the die in an inclined manner, two cutting blades for cutting EVA are arranged in the die, the two cutting blades are arranged in a V shape and are positioned on the same plane, an included angle between the two cutting blades is 45-75 degrees, the thickness of each cutting blade is 0.1-0.15 mm, the knife face of each cutting blade is vertical to the upper surface of the die, the cutting edges of the two cutting blades face to a feed inlet of the through hole, the included angle between the cutting edge of one cutting blade and the transverse diameter of the through hole is 30-45 degrees, the forming of the EVA trapezoidal product is realized by using the utility model, the waste materials are reduced during forming, the edge cutting is smooth and flat, the cutting tolerance can be controlled within 0.2mm, and the cutting size is ensured.

Description

Trapezoidal slitting device of EVA

Technical Field

The utility model belongs to the technical field of the cotton slitting of bubble, especially, relate to a trapezoidal slitting device of EVA.

Background

The EVA is a polyolefin brilliant plastic foam, it does not contain any harmful, poisonous substance to the human body, EVA is pliable and tough, light, the density is good, rich in elasticity, can be regarded as the cushion material to protect the better absorption of the products and disperse the external impact force, can paste and play the shockproof antifriction role on the surface of the products too; EVA need divide the strip to EVA in process of production, and conventional branch strip method is to place the EVA sheet on dividing the strip machine, cuts into regular rectangular bubble cotton according to dividing the strip machine, but ordinary branch strip machine can't cut out the trapezoidal product of EVA, as shown in figure 1 with EVA bubble cotton A perpendicular setting, the knife face slope setting of cutting blade B, use such branch strip method, the step can appear in the play of cutting edge, produces a large amount of waste materials simultaneously, improvement manufacturing cost.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome current defect, provide a trapezoidal slitting device of EVA, realize the shaping of the trapezoidal product of EVA, reduce the production of waste material, cut edge smoothly and level.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a trapezoidal slitting device of EVA, includes the mould, be provided with the through-hole that can supply the EVA slope to pass in the mould, be provided with two cutting blades that are used for cutting the EVA in the mould, two cutting blade is the V style of calligraphy setting and lies in the coplanar, two contained angle between the cutting blade is 45 ~ 75, every cutting blade's thickness is 0.1mm ~ 0.15mm, every cutting blade's knife face all with mould surface vertical, two cutting blade's cutting edge all is to the feed inlet of through-hole, one of them cutting blade's cutting edge and the contained angle between the through-hole diameter are 30 ~ 45.

Compared with the prior art, the utility model discloses realize following beneficial effect:

1. by adopting the EVA trapezoid slitting device, an EVA trapezoid product can be formed, the through hole for EVA to obliquely pass through and the two cutting blades arranged in a V shape are arranged in the EVA trapezoid slitting device, and the generation of waste materials can be reduced by vertically arranging the cutter faces of the cutting blades on the upper surface of a die, so that the production cost is reduced;

2. two cutting blades arranged in a V shape are adopted, the two cutting blades are positioned on the same plane, the cutting blade close to the feed port of the through hole firstly cuts the upper half section of the EVA side cut, the cutting blade far away from the feed port of the through hole cuts the lower half section of the EVA side cut, so that the upper section and the lower section of the EVA side cut are balanced in stress when cutting, the smooth edge cut without tool marks is ensured, the cutting tolerance is controllable within 0.2mm, and the cutting size is ensured.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is a prior art EVA striping method;

fig. 2 is a schematic structural view of an embodiment of the EVA trapezoid slitting device disclosed in the present invention;

fig. 3 is a schematic structural view of a part of an embodiment of the EVA trapezoid slitting device disclosed in the present invention;

FIG. 4 is an enlarged view of part A;

FIG. 5 is a schematic structural diagram according to a second embodiment;

FIG. 6 is a schematic view of the internal structure of the second embodiment;

FIG. 7 is a schematic diagram of the third embodiment.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Example one

Referring to fig. 1-3, including a mold 10, a through hole 11 is provided in the mold 10 for EVA30 to pass through obliquely, the inner wall of the through hole 11 is formed by mirror polishing, the roughness Ra of the inner wall of the through hole 11 is less than or equal to 0.4 μm, process holes 111 are provided at four corners of the through hole 11 to reserve a space for EVA30 during splitting, so as to prevent EVA30 from extruding and deforming during splitting, a slot 12 is milled in the mold 10 corresponding to the direction in which the through hole 11 extends, two cutting blades 20 for cutting EVA30 are provided in the slot 12, the two cutting blades 20 are arranged in a V shape and located on the same plane, a screw 171 is provided at the side of the mold 10 to fix the cutting blades 20 to the mold 10, the cutting blades 20 are ultra-thin blades, which may be stainless steel razor blades, the blade face of the cutting blade 20 is perpendicular to the upper surface of the mold 10, and compared with the prior art, the blade face is disposed obliquely, the perpendicular setting of knife face can avoid producing the waste material, reduction in production cost, the contained angle between two cutting blade 20 is 45 ~ 75, the angle between two cutting blade 20 is preferably 75, the cutting edge of two cutting blade 20 all faces the feed inlet of through-hole 11, the contained angle between the cutting edge of one of them cutting blade 20 and the through-hole 11 cross diameter is 30 ~ 45, the angle between the cutting edge of cutting blade 20 and the through-hole 11 cross diameter is preferably 45, in order to make EVA 30's side cut more level and more smooth, the cutting blade 20 of 0.1mm ~ 0.15mm thickness is selected for use usually.

The EVA trapezoidal slitting process comprises the following steps:

firstly, manually pushing EVA30 into a through hole 31 of a mold;

the second step is that: continuously pushing EVA into the through hole, pushing the EVA to two cutting blades arranged in a V shape, cutting the upper half of the EVA cut edge by the cutting blade 20 close to the feed port of the through hole 11, and cutting the lower half of the EVA cut edge by the cutting blade 20 far away from the feed port of the through hole 11;

the third step: further pushing the EVA, and pushing the formed EVA trapezoidal product out of the through hole;

the fourth step: and finally, rolling the EVA trapezoidal product outside the through hole into a material belt through a laminating machine for packaging, and continuously pulling in the EVA trapezoidal slitting by the laminating machine without manually pushing the EVA.

The EVA feed rate was 4m/min throughout the procedure.

In the second step the cutting blade 20 needs to be replaced once in two hours, ensuring the sharpness of the cutting edge and reducing burrs.

Example two

Referring to fig. 4-5, the difference between the present embodiment and the first embodiment is that the mold 10 includes a first mold 14 fixedly disposed and a second mold 13 movably disposed on the first mold 14, a guide rail (not shown in the drawings) for the second mold 13 to slide is disposed on the first mold 14, the cutting blade 20 is disposed between the first mold 14 and the second mold 13, the first mold 14 is provided with a protrusion 141 for the cutting blade 20 to hang, so as to prevent the cutting blade 20 from moving when the first mold 14 and the second mold 13 are closed, and after the first mold 14 and the second mold 13 are closed, the first mold 14 and the second mold 13 are locked and fixed by a screw 172.

EXAMPLE III

Referring to fig. 6, the present embodiment is different from the first embodiment and the second embodiment in that a blade placing area 15 is provided at the through hole 11 of the die 10, a movable insert 16 is provided at the blade placing area 15 of the die 10, and the movable insert 16 fixes the cutting blade 20 at the blade placing area 15 by a third screw 173, so that the cutting blade 20 is placed in such a way as to avoid damaging the entire through hole 11, and further to protect the integrity of the through hole 11.

To sum up, adopt above-mentioned trapezoidal slitting device of EVA, realize the shaping of the trapezoidal product of EVA, and adopt two cutting blade 20 that are the V style of calligraphy setting, two cutting blade 20 are located the coplanar, the cutting blade that is close to the through-hole feed inlet cuts the first half section that the EVA cut edge earlier, the cutting blade who keeps away from the through-hole feed inlet cuts the second half section that the EVA cut edge again, the atress of two sections when cutting about making the EVA cut edge is balanced, guarantee that the side cut is smooth level and smooth, there is not the tool mark step, and the tolerance that cuts is steerable within 0.2mm, ensure to cut the size.

The above embodiments are only for illustrating the technical conception and the features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which should not limit the scope of the present invention. All changes and modifications that come within the spirit of the invention are desired to be protected.

Claims

1. The utility model provides a trapezoidal slitting device of EVA, its characterized in that, includes the mould, be provided with the through-hole that can supply the EVA slope to pass in the mould, be provided with two cutting blades that are used for cutting the EVA in the mould, two cutting blade is the setting of V style of calligraphy and lies in the coplanar, two contained angle between the cutting blade is 45 ~ 75, every cutting blade's thickness is 0.1mm ~ 0.15mm, every cutting blade's knife face all with mould upper surface vertical, two cutting blade's cutting edge all faces the feed inlet of through-hole, one of them cutting blade's cutting edge and the contained angle between the through-hole transverse diameter are 30 ~ 45.

2. The EVA trapezoid slitting device of claim 1, wherein four corners of the through hole are provided with fabrication holes.

3. The EVA trapezoid slitting device as claimed in claim 1, wherein the cutting blade is an ultrathin blade.

4. The EVA trapezoid slitting device according to claim 1, wherein the inner wall of the through hole is formed by mirror grinding.

5. The EVA trapezoid slitting device of claim 1, wherein the roughness Ra of the inner wall of the through hole is less than or equal to 0.4 μm.

6. The EVA trapezoid slitting device according to claim 1, wherein the die has a slit milled in a direction corresponding to an extending direction of the through hole, and the cutting blade is fixed in the slit through a screw.

7. The EVA trapezoid slitting device according to claim 1, wherein the die comprises a first die fixedly arranged and a second die movably arranged on the first die, the cutting blade is arranged between the first die and the second die, the first die is provided with a projection for hanging the cutting blade, and the first die and the second die are fixed by a second screw.

8. The EVA trapezoidal slitting device of claim 1, wherein a blade placing area is arranged at the position, corresponding to the through hole, of the die, a movable insert is arranged at the position, corresponding to the blade placing area, of the die, and the movable insert fixes the cutting blade and the die through a third screw.