Stripping structure for silica gel foam dressing production

Abstract

The utility model discloses a stripping structure for silica gel foam dressing production, and belongs to the technical field of medical dressings. Comprising a front stripping mechanism and a rear stripping mechanism, the front stripping mechanism comprises a first stripping knife, a front traction roller set and a stripping rod, and the rear stripping mechanism comprises a second stripping knife and a rear traction roller set; a strip-shaped hole is formed in the stripping rod in the left-right direction, located above the composite structure and close to the composite structure. The stripping rod vertically penetrates through the strip-shaped hole; the lower end of the first stripping knife extends downwards relative to the stripping rod, and a front gap and a rear gap are respectively formed between the first stripping knife and the front and rear sides of the strip-shaped hole; the silica gel is pulled by the front traction roller set to bypass the rear side of the stripping rod, the silica gel and the front release layer are stripped at the lower end of the first stripping knife, and the front release layer upwards penetrates through the rear gap and is pulled upwards by the front traction roller set; and the silica gel upwards penetrates through the front gap and then downwards bypasses the front side of the stripping rod to reach the composite structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical dressings, and particularly relates to a stripping structure used for the production of silicone gel foam dressings. Background Art

[0002] Dressing refers to auxiliary materials used in addition to the main ingredients of an item. Modern wound dressings include interactive wound dressings, foam dressings, hydrocolloid dressings, etc. Medical silicone gel dressings are a new type of functional dressing, mainly used for the care of chronic wounds such as bedsores and pressure sores. Since chronic wounds are difficult to heal and are prone to secondary injuries, traditional medical dressings can no longer meet clinical care requirements, so it is necessary to design and develop a new type of medical silicone gel functional dressing to solve the above clinical problems.

[0003] For example, patent application number CN201320664635.2 discloses a silicone gel foam patch, comprising an adhesive film, a foam core located on one side of the adhesive film, and a mesh silicone gel layer completely covering the foam core and the adhesive film. The preparation equipment of the silicone gel foam patch can be found in the description of patent application number CN201920440462.3.

[0004] The silicone gel layer is a three-layer structure before being compounded with the breathable substrate layer and the release layer. It is necessary to peel off the release layers on both sides of the silicone gel (release layers are provided on both sides of the silicone gel to form a double-sided tape structure to allow the silicone gel to be rolled up). In the prior art, the two release layers are peeled off by a front peeling mechanism and a rear peeling mechanism respectively. The front peeling mechanism and the rear peeling mechanism are respectively located in the front and rear of the composite structure. The front peeling mechanism includes a first peeling knife and a front traction roller group, etc. The rear peeling mechanism includes a second peeling knife and a rear traction roller group, etc. The first peeling knife is horizontally arranged and located at the front and upper part of the composite structure. The second peeling knife is horizontally arranged and located on the upper side of the silicone gel. The first peeling knife, the front traction roller group, the second peeling knife and the rear traction roller group are all arranged in the left and right directions. See Figure 1 The front traction roller group includes at least four traction rollers (the traction roller above the first peeling blade 5 (for traction of the front release layer 2), the traction roller behind the first peeling blade 5 (for inputting the silicone gel 1), the traction roller on the upper side of the first peeling blade 5 (for pressing the silicone gel 1 on the first peeling blade 5), and the traction roller below the rear of the first peeling blade 5 (for outputting the silicone gel 1)). The applicant found the following problems when using the above-mentioned front peeling mechanism:

[0005] (1) After the silicone gel is peeled off the release paper, it needs to be pulled by a traction roller, which will make the distance between the front peeling mechanism and the composite structure farther. When there is an abnormal production (such as abnormal silicone gel delivery or poor tension control), the silicone gel may bend downward and fall onto the foam core below, affecting production.

[0006] (2) Silicone gel is a soft material with a large number of holes on it, which leads to a big difference from the release layer (which is usually not easy to deform). Silicone gel is easy to deform (especially the holes on the silicone gel are deformed); Silicone gel needs tension stability.

[0007] (3) The peeling effect is not good. The silicone gel and the front release layer cannot be guaranteed to be 100% separated. The unseparated silicone gel and the front release layer can be output together from the lower side of the first peeling knife 5, which may cause problems such as silicone gel deformation, silicone gel and the back release layer separation, and even shutdown. Summary of the invention

[0008] In order to solve the above problems, the embodiment of the utility model provides a peeling structure for the production of silicone gel foam dressings, the front peeling mechanism is improved, and the front peeling mechanism can be arranged close to the composite structure; the silicone gel bypasses the peeling rod in an S shape, which can effectively control the tension; the peeling effect is good (it has a secondary peeling function). The technical solution is as follows:

[0009] The utility model embodiment provides a stripping structure for the production of silicone gel foam dressing, including a front stripping mechanism and a rear stripping mechanism, the front stripping mechanism and the rear stripping mechanism are respectively located in front of and behind a composite structure 4, the front stripping mechanism includes a first stripping knife 5 and a front traction roller group, the rear stripping mechanism includes a second stripping knife 12 and a rear traction roller group, the second stripping knife 12 is horizontally arranged, the first stripping knife 5, the front traction roller group, the second stripping knife 12 and the rear traction roller group are all arranged in the left and right directions; the front stripping mechanism also includes a stripping rod 8; the stripping rod 8 is arranged in the left and right directions, and a strip hole 9 for silicone gel 1 to pass through is provided on its upper edge in the left and right directions, and its position Above the composite structure 4, it is arranged close to the composite structure 4; the strip hole 9 vertically penetrates the peeling rod 8; the first peeling knife 5 is vertically arranged, and is located in the strip hole 9, and its lower end extends downward relative to the corresponding side of the peeling rod 8, and it and the front and rear sides of the strip hole 9 respectively form a front gap 10 and a rear gap 11; the silicone gel 1 is pulled by the front traction roller group to bypass the rear side of the peeling rod 8, and the silicone gel 1 and the front release layer 2 are peeled off at the lower end of the first peeling knife 5, and the front release layer 2 passes upward through the rear gap 11 and is pulled upward by the front traction roller group; the silicone gel 1 passes upward through the front gap 10, and then downward around the front side of the peeling rod 8 to the composite structure 4.

[0010] Specifically, the peeling bar 8 in the embodiment of the present invention is located at the upper front of the composite structure 4, and the distance between the peeling bar 8 and the composite structure 4 is less than 5 cm.

[0011] Specifically, the strip hole 9 in the embodiment of the utility model is arranged along the radial direction of the peeling rod 8, and its left and right sides are respectively located at the adjacent outer sides of the corresponding sides of the silicone gel 1; the first peeling knife 5 is arranged in the middle of the strip hole 9, and its upper end extends upward relative to the corresponding side of the peeling rod 8, and its left and right ends are respectively fixed on the left and right sides of the strip hole 9, and it is arranged along the direction of the strip hole 9.

[0012] Among them, the front traction roller group in the embodiment of the utility model includes a first traction roller 6 and a second traction roller 7, the first traction roller 6 and the second traction roller 7 are both arranged in the left and right directions, the second traction roller 7 is located in the front and upper part of the peeling rod 8, and the first traction roller 6 is located above the second traction roller 7; the silicone gel 1 goes backward to the upper side of the first traction roller 6, and winds downward from the rear side of the first traction roller 6 to the rear side of the peeling rod 8; the front release layer 2 winds out from the rear gap 11, obliquely forward and upward to the upper side of the second traction roller 7, and winds forward from the upper side of the second traction roller 7.

[0013] Among them, the rear traction roller group in the embodiment of the utility model includes a third traction roller 13, the second stripping knife 12 is located on the upper side of the silicone gel 1, the third traction roller 13 is arranged in the left and right direction and is located in the front and upper part of the second stripping knife 12, the silicone gel 1 and the back release layer 3 are peeled off at the rear end of the second stripping knife 12; the back release layer 3 is obliquely moved forward and upward to the lower side of the third traction roller 13, and then wound upward from the front side of the third traction roller 13.

[0014] Specifically, the third traction roller 13 in the embodiment of the present invention is located above and behind the composite structure 4 and directly behind the peeling bar 8 .

[0015] Specifically, the strip-shaped holes 9 and the first stripping blade 5 in the embodiment of the utility model are both arranged obliquely downward from top to bottom, and the angle between them and the vertical direction is 10-45°.

[0016] Specifically, the front and rear sides of the peeling rod 8 in the embodiment of the utility model are smooth, and its diameter is 3-6 cm; the width of the strip hole 9 in the front and rear directions is 1.0-2.5 cm.

[0017] This patent has the following beneficial effects: The embodiment of the utility model provides a stripping structure for the production of silicone gel foam dressings, improves the front stripping mechanism, and does not adjust the rear stripping mechanism (the silicone gel has been compounded with the lower structure, and the tension changes little). The front stripping mechanism can be set close to the composite structure (no traction roller is required later), and can be specifically set above the adjacent composite structure, which not only has a compact structure, but also can prevent the silicone gel from sagging downward; the silicone gel bypasses the stripping rod in an S shape, which can effectively control the tension and ensure the subsequent composite effect. The stripping effect is good (it has the function of secondary stripping. If stripping is not performed at the lower end of the first stripping knife, stripping can be performed once at the upper end of the front gap), and the stripping effect can be guaranteed at high speed, and a faster production speed can be designed to increase output. In addition, this patent can also reduce the number of traction rollers. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an existing front stripping mechanism;

[0019] Figure 2 It is a structural schematic diagram of a stripping structure used for the production of silicone gel foam dressings in an embodiment of the utility model;

[0020] Figure 3 yes Figure 2 A partial enlarged view of the front stripping mechanism;

[0021] Figure 4 is a cross-sectional view of the peeling rod.

[0022] In the figure: 1 silicone gel, 2 front release layer, 3 back release layer, 4 composite structure, 5 first peeling knife, 6 first traction roller, 7 second traction roller, 8 peeling rod, 9 strip hole, 10 front gap, 11 rear gap, 12 second peeling knife, 13 third traction roller. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0024] Example 1

[0025] See also Figure 2-4 Embodiment 1 provides a peeling structure for silicone gel foam dressing production, including a front peeling mechanism and a rear peeling mechanism, etc. The front peeling mechanism and the rear peeling mechanism are used to peel off the front release layer and the back release layer respectively. The front peeling mechanism and the rear peeling mechanism are respectively located in front and rear of the composite structure 4 (which is the existing structure).

[0026] The front peeling mechanism includes a first peeling knife 5, a front traction roller group and a peeling rod 8, etc. The first peeling knife 5, the front traction roller group and the peeling rod 8 are all arranged in the left and right directions. The peeling rod 8 is arranged in the left and right directions, and its left or right end is fixed on the frame. A strip hole 9 is arranged in the left and right directions on its upper side for the silicone gel 1 to pass through. The strip hole 9 is located in the front upper part of the composite structure 4 and is arranged close to the composite structure 4 (specifically, the distance between the peeling rod 8 and the composite structure 4 is less than 5 cm). The strip hole 9 vertically penetrates the peeling rod 8, and is arranged along the radial direction of the peeling rod 8. The left and right sides are respectively located on the adjacent outer sides of the corresponding sides of the silicone gel 1. The first peeling knife 5 is arranged vertically (can be tilted in conjunction with the front traction roller group), and is located in the middle of the strip hole 9. Its lower end extends downward relative to the corresponding side of the peeling rod 8, and its upper end extends upward relative to the corresponding side of the peeling rod 8. Its left and right ends are respectively fixed on the left and right sides of the strip hole 9, and it and the front and rear sides of the strip hole 9 form a front gap 10 and a rear gap 11 respectively, and it is arranged along the direction where the strip hole 9 is located. Specifically, the front gap 10 and the rear gap 11 are both obliquely arranged strip holes. Among them, the front traction roller group includes the first traction roller 6 and the second traction roller 7, and other traction rollers can be added as needed. The first traction roller 6 and the second traction roller 7 are both arranged in the left and right directions, the second traction roller 7 is located in the front and upper part of the peeling rod 8, and the first traction roller 6 is located above the second traction roller 7 (specifically directly above). The silicone gel 1 (before peeling the front release layer 2) goes back to the upper side of the first traction roller 6, and winds downward from the rear side of the first traction roller 6 to the rear side of the peeling rod 8. The silicone gel 1 and the front release layer 2 are peeled at the lower end (the blade end) of the first peeling knife 5; the silicone gel 1 (after peeling the front release layer 2) passes upward through the front gap 10, and then goes downward around the front side of the peeling rod 8 to the composite structure 4. The front release layer 2 (release paper or release film, etc.) passes upward through the rear gap 11, and the front release layer 2 winds out from the rear gap 11, obliquely forward and upward to the upper side of the second traction roller 7, and winds forward from the upper side of the second traction roller 7.

[0027] Among them, the rear peeling mechanism includes a second peeling knife 12 and a rear traction roller group, etc. The second peeling knife 12 and the rear traction roller group are both arranged in the left-right direction, which is consistent with the prior art. The second peeling knife 12 is arranged horizontally and is located on the upper side of the silicone gel 1. The rear traction roller group includes a third traction roller 13, etc., and other traction rollers can be added as needed. The third traction roller 13 is arranged in the left-right direction and is located in the front and upper part of the second peeling knife 12. The silicone gel 1 and the reverse release layer 3 are peeled off at the rear end (the blade end) of the second peeling knife 12. The reverse release layer 3 (release paper or release film, etc.) is obliquely moved forward and upward to the lower side of the third traction roller 13, and then wound upward from the front side of the third traction roller 13. Specifically, the third traction roller 13 is located in the upper rear part of the composite structure 4 and is directly behind the peeling rod 8.

[0028] Specifically, the strip holes 9 and the first stripping blade 5 in the embodiment of the utility model are arranged obliquely downward from top to bottom, and the angle between them and the vertical direction is 10-45° so as to facilitate the front release layer 2 to be output upward along the first stripping blade 5 .

[0029] Specifically, the front and rear sides of the peeling rod 8 in the embodiment of the utility model are smooth, and its diameter is 3-6 cm (specifically 4.5 cm). The width of the strip hole 9 in the front and rear directions is 1.0-2.5 cm (specifically 1.5 cm).

[0030] Example 2

[0031] Example 2 provides a peeling structure for the production of silicone gel foam dressings, which has a structure that is basically the same as that of Example 1, except that: the front release layer 2 in this example is release paper, and the back release layer 3 is a release film.

[0032] Among them, "first", "second" and "third" in this patent only serve to distinguish and have no other special meanings.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A stripping structure for producing silicone gel foam dressings, comprising a front stripping mechanism and a rear stripping mechanism, wherein the front stripping mechanism and the rear stripping mechanism are respectively located in front of and behind a composite structure (4), wherein the front stripping mechanism comprises a first stripping knife (5) and a front traction roller group, wherein the rear stripping mechanism comprises a second stripping knife (12) and a rear traction roller group, wherein the second stripping knife (12) is arranged horizontally, and the first stripping knife (5), the front traction roller group, the second stripping knife (12) and the rear traction roller group are all arranged in the left and right directions; characterized in that: The front peeling mechanism also includes a peeling rod (8); the peeling rod (8) is arranged in the left-right direction, and a strip hole (9) is arranged on the upper side of the peeling rod (8) for the silicone gel (1) to pass through, and the strip hole (9) is located above the composite structure (4) and is arranged close to the composite structure (4); the strip hole (9) vertically penetrates the peeling rod (8); the first peeling knife (5) is arranged vertically, and is located in the strip hole (9), and its lower end extends downward relative to the corresponding side of the peeling rod (8), and it and the front and rear sides of the strip hole (9) respectively form a front gap (10) and a rear gap (11); the silicone gel (1) is pulled around the rear side of the peeling rod (8) by the front traction roller group, and the silicone gel (1) and the front release layer (2) are peeled at the lower end of the first peeling knife (5), and the front release layer (2) passes through the rear gap (11) upward and is pulled upward by the front traction roller group; the silicone gel (1) passes through the front gap (10) upward, and then passes around the front side of the peeling rod (8) downward to the composite structure (4).

2. The peeling structure for producing silicone gel foam dressing according to claim 1, characterized in that: The peeling rod (8) is located at the upper front of the composite structure (4), and the distance between the peeling rod (8) and the composite structure (4) is less than 5 cm.

3. The peeling structure for producing silicone gel foam dressing according to claim 2, characterized in that: The strip hole (9) is arranged along the radial direction of the stripping rod (8), and its left and right sides are respectively located on the adjacent outer sides of the corresponding sides of the silicone gel (1); the first stripping knife (5) is arranged in the middle of the strip hole (9), and its upper end extends upward relative to the corresponding side of the stripping rod (8), and its left and right ends are respectively fixed on the left and right sides of the strip hole (9), and it is arranged along the direction where the strip hole (9) is located.

4. The peeling structure for producing silicone gel foam dressing according to claim 3, characterized in that: The front traction roller group comprises a first traction roller (6) and a second traction roller (7), wherein the first traction roller (6) and the second traction roller (7) are both arranged in the left-right direction, the second traction roller (7) is located in front and above the peeling rod (8), and the first traction roller (6) is located above the second traction roller (7); the silicone gel (1) moves backward to the upper side of the first traction roller (6), and winds downward from the rear side of the first traction roller (6) to the rear side of the peeling rod (8); the front release layer (2) winds out from the rear gap (11), obliquely moves forward and upward to the upper side of the second traction roller (7), and winds forward from the upper side of the second traction roller (7).

5. The peeling structure for producing silicone gel foam dressing according to claim 4, characterized in that: The rear traction roller group comprises a third traction roller (13), the second stripping knife (12) is located on the upper side of the silicone gel (1), the third traction roller (13) is arranged in the left-right direction and is located in front of and above the second stripping knife (12), the silicone gel (1) and the reverse release layer (3) are stripped at the rear end of the second stripping knife (12); the reverse release layer (3) is obliquely moved forward and upward to the lower side of the third traction roller (13), and then wound upward from the front side of the third traction roller (13).

6. The peeling structure for producing silicone gel foam dressing according to claim 5, characterized in that: The third traction roller (13) is located above and behind the composite structure (4) and directly behind the peeling bar (8).

7. The peeling structure for producing silicone gel foam dressing according to claim 5, characterized in that: The strip-shaped hole (9) and the first stripping knife (5) are both arranged obliquely forward from top to bottom, and the angle between them and the vertical direction is 10-45°.

8. The peeling structure for producing silicone gel foam dressing according to claim 1, characterized in that: The front and rear sides of the stripping rod (8) are smooth, and its diameter is 3-6 cm; the width of the strip hole (9) in the front and rear directions is 1.0-2.5 cm.

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