Colorful silica gel preparation process and device

Abstract

The invention discloses a colorful silica gel preparation process and device, and relates to the technical field of silica gel preparation. The silica gel product has a colorful effect. The preparation process of the colorful silica gel comprises the following steps: raw material mixing: uniformly mixing silica gel raw materials and various additives to prepare a silica gel mixture; pressing the raw materials: pressing the mixture into a certain shape in a calendering manner; and laser treatment is conducted, specifically, treatment is conducted on the mold through laser, and the colorful effect is generated. Laser generated by the laser head is used for conducting laser on the surface of silica gel, the colorful effect is formed on the surface of the silica gel subjected to laser treatment, and therefore the attractiveness of the silica gel is improved, the abutting plate is limited through the limiting head, and when the driving rod continues to drive the driving rod and the supporting disc to rotate, the supporting disc is driven to rotate. The rotary disc and the supporting disc rotate relatively through the torsion of the first torsion spring, the guide-out hole rotates relative to the material hole, and finally the silica gel in the positioning hole falls into the moving mechanism through the guide-out hole.

Description

Technical Field

[0001] The invention relates to the technical field of silica gel preparation, and in particular to a colorful silica gel preparation process and a device thereof. Background Art

[0002] In the prior art, silicone products include mobile phone cases, trademark LOGOs, etc. Silicone has the characteristics of good flexibility and a comfortable grip. The production of silicone mainly includes steps such as raw material mixing, pressing and vulcanization. At present, in order to improve the visual effect of silicone, laser treatment is performed on the silicone during the production process. After laser treatment, the surface of the silicone will have a colorful effect, making the silicone product more beautiful.

[0003] After searching, the Chinese patent application number 202111498473.5 discloses a preparation device for a silicone sleeve and a manufacturing method thereof, including a workbench on which the silicone sleeve can be placed, a plurality of placement seats are provided above the workbench, and the inner wall of the placement seat is provided with a trimming mechanism that can remove burrs on the inside and outside of silicone sleeves of different sizes; a fixing column is provided above the placement seat, and a fixing mechanism that can press the silicone sleeve is provided above the fixing column.

[0004] The preparation device and method of the silicone sleeve in the above patent have the following shortcomings: in the process of making the silicone sleeve, the silicone sleeve needs to be manually loaded and unloaded after trimming, which makes the loading and unloading process of the silicone sleeve take a long time. When a large number of silicone sleeves need to be produced, the production efficiency will be reduced. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a colorful silica gel preparation process and device.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A process for preparing colorful silica gel comprises the following steps:

[0008] S1: Raw material mixing: Mix the silica gel raw materials and various additives evenly to make silica gel mixture;

[0009] S2: Raw material pressing: the mixed material is pressed into a certain shape by calendering;

[0010] S3: Laser: The mold is processed by laser to produce a colorful effect;

[0011] S4: Vulcanization: Put the laser-treated silicone products into the vulcanization furnace and vulcanize them under high temperature and high pressure;

[0012] S5: Silicone cooling: Take out the vulcanized silicone products and place them in a ventilated place for natural cooling, waiting for the temperature to drop to room temperature;

[0013] S6: Silicone trimming: After the silicone is cooled, the small amount of silicone particles remaining on its edge are trimmed;

[0014] S7: Silicone dust removal: Use an air gun to blow and remove dust from the silicone surface;

[0015] S8: Silica gel packaging: Pack and store the silica gel products after dust removal.

[0016] A device for preparing colorful silicone comprises a base and a laser part and a vulcanization part for laser-processing silicone, a U-shaped frame is fixed to the outer wall of the top of the base, a driving motor is fixed to the inner wall of the top of the U-shaped frame, an output end of the driving motor is connected to a driving rod through a coupling, a supporting disk is fixed to the outer wall of the driving rod through a pin, and a lead-out hole is provided on the surface of the supporting disk, a turntable is movably connected to the circumferential outer wall of the driving rod, and a material hole is provided on the surface of the turntable, a torsion spring is sleeved on the circumferential outer wall of the driving rod, and two ends of the torsion spring are respectively fixed to the top of the turntable and the circumferential outer wall of the driving rod, and a positioning plate for positioning the silicone is placed inside the material hole.

[0017] Further: the laser part includes a bracket and a laser head, the bracket is fixed to the top outer wall of the base, and the laser head is fixed to the top outer wall of the bracket.

[0018] Further: the vulcanization part includes a vacuum vulcanization mechanism and a moving mechanism, the vacuum vulcanization mechanism includes a hydraulic cylinder and a support frame, the support frame is fixed to the top outer wall of the base, and the hydraulic cylinder is fixed to the top outer wall of the support frame, and the output end of the hydraulic cylinder is fixed with a vulcanization box through a pin.

[0019] As a preferred solution of the present invention: an extension plate is fixed to the outer wall of one side of the vulcanization box, and a limit head is welded to the bottom of the extension plate, and an abutment plate used in conjunction with the limit head is fixed to the circumferential outer wall of the turntable.

[0020] As a further solution of the present invention: the moving mechanism includes a sliding frame and a sliding seat, the sliding frame is fixed to the top outer wall of the base, and the sliding seat is movably connected to the outer wall of the sliding frame, and a lifting piece is fixed on the top of the sliding seat.

[0021] As a further solution of the present invention: a vertical plate is fixed to the outer wall of the top of the base, a threaded rod is movably connected between the two vertical plates, a second drive motor is fixed to the outer wall of one side of the vertical plate, and the output end of the second drive motor is connected to one end of the threaded rod through a coupling, and the sliding seat and the threaded rod are threadedly connected.

[0022] On the basis of the above scheme: the lifting member includes a frame, a rotating shaft and a swinging plate, the frame is welded to the outer wall of the top of the sliding seat, and the rotating shaft is movably connected to the inner wall of the through hole opened on the surface of the frame, the swinging plate is welded to the circumferential outer wall of the rotating shaft, and a receiving plate is welded on the top of the swinging plate, the outer wall of the rotating shaft is sleeved with two torsion springs, and the two ends of the two torsion springs are respectively clamped to one side of the frame and the end of the rotating shaft.

[0023] On the basis of the above-mentioned solution: a positioning column is welded on the outer wall of the top of the receiving plate, and a positioning groove matching the outer diameter of the positioning column is opened at the bottom of the vulcanization box.

[0024] On the basis of the above-mentioned solution: a accommodating frame is fixed on the outer wall at the top of the receiving plate, and rollers are movably connected between the inner walls on both sides of the accommodating frame.

[0025] The beneficial effects of the present invention are:

[0026] 1. A device for preparing colorful silicone, which uses the laser generated by a laser head to laser the surface of silicone, so that the surface of the silicone after laser treatment forms a colorful effect, thereby improving the aesthetics of the silicone.

[0027] 2. A colorful silicone preparation device uses a limit head to limit the contact plate. When the driving rod continues to drive the driving rod and the support plate to rotate, the torque of the torsion spring is used to make the turntable and the support plate rotate relative to each other, and the lead-out hole rotates relative to the material hole, and finally the silicone in the positioning hole finally falls into the moving mechanism through the lead-out hole.

[0028] 3. A device for preparing colorful silicone. When the second driving motor drives the threaded rod to rotate, the sliding seat moves horizontally under the guidance of the sliding frame. When the lifting member moves to the bottom of the outlet hole, the falling silicone is received. When the receiving plate moves the silicone to the bottom of the vulcanization box, the hydraulic cylinder is used to drive the vulcanization box to move down and close the receiving plate, thereby vulcanizing the silicone.

[0029] 4. A device for preparing colorful silicone, which uses the bottom of a vulcanization box to press a roller, causing the torsion spring 2 to gradually produce elastic deformation. The roller rolls along the bottom of the vulcanization box, causing the receiving plate to tilt at a certain angle relative to the frame. After the receiving plate is tilted, the silicone slides along the surface of the receiving plate and is discharged.

[0030] 5. A device for preparing colorful silica gel, which makes the longitudinal section of the material hole into an inverted "T" shape. By using this structure, when the positioning plate is placed in the material hole, the bottom of the material hole supports the positioning plate to prevent the positioning plate from falling out of the material hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of a process for preparing colorful silica gel proposed by the present invention;

[0032] Figure 2 It is a schematic diagram of the overall structure of a colorful silica gel preparation device proposed by the present invention;

[0033] Figure 3 It is a side structural schematic diagram of a colorful silica gel preparation device proposed by the present invention;

[0034] Figure 4 It is a schematic diagram of the overall structure of a feeding part of a colorful silica gel preparation device proposed by the present invention;

[0035] Figure 5 It is a schematic diagram of the explosion structure of the feeding part of a colorful silica gel preparation device proposed by the present invention;

[0036] Figure 6 This is a schematic diagram of the overall structure of the vulcanization part of a colorful silica gel preparation device proposed by the present invention;

[0037] Figure 7 This is a schematic diagram of the explosion structure of the vulcanization part of a colorful silica gel preparation device proposed by the present invention;

[0038] Figure 8 It is a schematic diagram of the structure of a moving mechanism of a colorful silica gel preparation device proposed by the present invention.

[0039] In the figure: base 1; turntable 2; bracket 3; laser head 4; hydraulic cylinder 5; support frame 6; receiving plate 7; sliding frame 8; threaded rod 9; vertical plate 10; U-shaped frame 11; torsion spring 12; driving rod 13; positioning plate 14; material hole 15; resistance plate 16; outlet hole 17; driving motor 1 18; supporting plate 19; vulcanizing box 20; sliding seat 21; roller 22; driving motor 2 23; limiting head 24; extension plate 25; positioning groove 26; positioning column 27; swing plate 28; torsion spring 2 29; frame 30; rotating shaft 31; accommodating frame 32. DETAILED DESCRIPTION

[0040] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0041] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0042] Embodiment 1:

[0043] A colorful silica gel preparation process, such as Figure 1 As shown, the following steps are included:

[0044] S1: Raw material mixing: Mix the silica gel raw materials and various additives evenly to make silica gel mixture;

[0045] S2: Raw material pressing: the mixed material is pressed into a certain shape by calendering;

[0046] S3: Laser: The mold is processed by laser to produce a colorful effect;

[0047] S4: Vulcanization: Put the laser-treated silicone products into the vulcanization furnace and vulcanize them under high temperature and high pressure;

[0048] S5: Silicone cooling: Take out the vulcanized silicone products and place them in a ventilated place for natural cooling, waiting for the temperature to drop to room temperature;

[0049] S6: Silicone trimming: After the silicone is cooled, the small amount of silicone particles remaining on its edge are trimmed;

[0050] S7: Silicone dust removal: Use an air gun to blow and remove dust from the silicone surface;

[0051] S8: Silica gel packaging: Pack and store the silica gel products after dust removal.

[0052] Embodiment 2:

[0053] A colorful silica gel preparation device, such as Figures 2 to 8 As shown, it includes a base 1 and a laser part and a vulcanization part for lasering silicone, the top outer wall of the base 1 is fixed with a U-shaped frame 11 by bolts, and the top inner wall of the U-shaped frame 11 is fixed with a driving motor 18 by bolts, and the output end of the driving motor 18 is connected with a driving rod 13 through a coupling, and the outer wall of the driving rod 13 is fixed with a supporting disk 19 by a pin, and the surface of the supporting disk 19 is provided with a lead-out hole 17, the circumferential outer wall of the driving rod 13 is rotatably connected with a turntable 2, and the surface of the turntable 2 is provided with a material hole 15, the circumferential outer wall of the driving rod 13 is sleeved with a torsion spring 12, and the two ends of the torsion spring 12 are respectively fixed to the top of the turntable 2 and the circumferential outer wall of the driving rod 13, and a positioning plate 14 for positioning the silicone is placed inside the material hole 15;

[0054] The longitudinal section of the material hole 15 is an inverted "T" shape. With this structure, when the positioning plate 14 is placed in the material hole 15, the bottom of the material hole 15 supports the positioning plate 14 to prevent the positioning plate 14 from falling out of the material hole 15. In this embodiment, the cross section of the positioning plate 14 is preferably elliptical, so as to ensure that when the positioning plate 14 is placed in the material hole 15, the positioning plate 14 is prevented from rotating relative to the material hole 15. The positioning plate 14 is provided with a positioning hole adapted to the silica gel. In this embodiment, the positioning hole on the positioning plate 14 is "H" shaped as an example. In the actual processing process, the positioning hole The shape includes but is not limited to "H" shape. In the initial stage, the silicone to be laser-processed is placed in the positioning hole on the positioning plate 14. When the driving motor 18 is used to drive the driving rod 13 to rotate, the turntable 2 and the support plate 19 keep rotating synchronously under the connection action of the torsion spring 12. When the silicone in the positioning hole rotates to the bottom of the laser part, the laser part is used to laser-process the silicone so that a colorful effect is formed on the surface of the silicone. When the silicone laser is completed, the driving rod 13 is used to continue to drive the turntable 2 and the support plate 19 to rotate and move the silicone to the vulcanization part for vulcanization.

[0055] The laser part includes a bracket 3 and a laser head 4. The bracket 3 is fixed to the top outer wall of the base 1 by bolts, and the laser head 4 is fixed to the top outer wall of the bracket 3 by bolts.

[0056] When the silicone moves to the bottom of the laser head 4, the laser generated by the laser head 4 is used to laser the surface of the silicone, so that the surface of the silicone after laser treatment forms a colorful effect, thereby improving the aesthetics of the silicone.

[0057] The vulcanization part includes a vacuum vulcanization mechanism and a moving mechanism, and the vacuum vulcanization mechanism includes a hydraulic cylinder 5 and a support frame 6. The support frame 6 is fixed to the top outer wall of the base 1 by bolts, and the hydraulic cylinder 5 is fixed to the top outer wall of the support frame 6 by bolts. The output end of the hydraulic cylinder 5 is fixed with a vulcanization box 20 by a pin, and an extension plate 25 is fixed to the outer wall of one side of the vulcanization box 20 by bolts, and a limit head 24 is welded to the bottom of the extension plate 25. The outer wall of the circumference of the turntable 2 is fixed with a contact plate 16 used in conjunction with the limit head 24;

[0058] When the driving motor 18 drives the contact plate 16 to gradually approach the vulcanizing box 20, the hydraulic cylinder 5 is used to drive the vulcanizing box 20 to move downward. When the limit head 24 moves to the same height as the contact plate 16, when the contact plate 16 moves to fit with the limit head 24, the limit head 24 limits the contact plate 16. Therefore, when the driving rod 13 continues to drive the driving rod 13 and the support plate 19 to rotate, the torsion force of the torsion spring 12 is used to make the turntable 2 and the support plate 19 rotate relative to each other, and the outlet hole 17 rotates relative to the material hole 15. When the guide hole 17 rotates relative to the material hole 15, When the outlet hole 17 rotates to coincide with the material hole 15, the silicone in the positioning hole on the positioning plate 14 is no longer supported by the support plate 19, so that the silicone in the positioning hole finally falls into the moving mechanism through the outlet hole 17. The moving mechanism receives the silicone and moves it to the bottom of the vulcanization box 20. After the vulcanization box 20 and the moving mechanism are sealed, the silicone is vulcanized. The sulfiding gas is mainly mercaptan and hydrogen sulfide, which react with the silicon-hydrogen bonds in the silicone molecules to cross-link the silicone molecules, so that the silicone product has higher hardness and better elasticity.

[0059] The moving mechanism includes a sliding frame 8 and a sliding seat 21, the sliding frame 8 is fixed to the top outer wall of the base 1 by bolts, and the sliding seat 21 is slidably connected to the outer wall of the sliding frame 8, a lifting piece is fixed on the top of the sliding seat 21, a vertical plate 10 is fixed to the top outer wall of the base 1 by bolts, a threaded rod 9 is rotatably connected between the two vertical plates 10, a driving motor 23 is fixed to the outer wall of one side of the vertical plate 10 by bolts, and the output end of the driving motor 23 is connected to one end of the threaded rod 9 through a coupling, and the sliding seat 21 and the threaded rod 9 are threadedly connected;

[0060] When the driving motor 23 drives the threaded rod 9 to rotate, the sliding seat 21 moves laterally under the guidance of the sliding frame 8, and when the lifting piece moves to the bottom of the outlet hole 17, it receives the falling silica gel.

[0061] The lifting member includes a frame 30, a rotating shaft 31 and a swing plate 28. The frame 30 is welded to the outer wall of the top of the sliding seat 21, and the rotating shaft 31 is rotatably connected to the inner wall of the through hole opened on the surface of the frame 30. The swing plate 28 is welded to the outer wall of the circumference of the rotating shaft 31, and a receiving plate 7 is welded on the top of the swing plate 28. The outer wall of the rotating shaft 31 is sleeved with a second torsion spring 29, and the two ends of the second torsion spring 29 are respectively clamped to one side of the frame 30 and the end of the rotating shaft 31;

[0062] The receiving plate 7 is used to receive the falling silicone. When the receiving plate 7 moves the silicone to the bottom of the vulcanization box 20, the hydraulic cylinder 5 is used to drive the vulcanization box 20 to move downward and close the receiving plate 7, thereby vulcanizing the silicone.

[0063] A positioning column 27 is welded on the top outer wall of the receiving plate 7, and a positioning groove 26 matching the outer diameter of the positioning column 27 is opened at the bottom of the vulcanization box 20;

[0064] The vulcanization box 20 and the receiving plate 7 can be positioned by providing the positioning columns 27 and the positioning grooves 26 .

[0065] The top outer wall of the receiving plate 7 is fixed with a receiving frame 32 by bolts, and the inner walls on both sides of the receiving frame 32 are rotatably connected with rollers 22;

[0066] When the silicone is vulcanized, the moving mechanism is used to move the roller 22 a certain distance laterally so that the roller 22 and the bottom surface of the vulcanization box 20 are in a facing position. When the vulcanized silicone needs to be unloaded, the hydraulic cylinder 5 is used to drive the vulcanization box 20 downward, so that the bottom surface of the vulcanization box 20 presses the roller 22. During this process, the torsion spring 29 gradually produces elastic deformation, and the roller 22 rolls along the bottom surface of the vulcanization box 20, so that the receiving plate 7 is tilted at a certain angle relative to the frame 30. After the receiving plate 7 is tilted, the silicone slides along the surface of the receiving plate 7 for unloading.

[0067] When the present embodiment is in use, firstly, the positioning plate 14 is placed in the material hole 15, and then the silicone is placed in the positioning hole on the positioning plate 14, and then the driving rod 13 is used to drive the turntable 2 and the support plate 19 to rotate, and when the silicone rotates to the position directly below the laser head 4, the laser head 4 is used to perform laser treatment on the silicone, and after the silicone is laser treated, the driving rod 13 is used to continue to transport the silicone, and when the contact plate 16 moves to fit with the limit head 24, the relative rotation between the turntable 2 and the support plate 19 is used, so that when the outlet hole 17 and the material hole 15 are aligned, the silicone falls onto the receiving plate 7 through the positioning hole and the outlet hole 17 under the action of its own gravity, and then the receiving plate 7 moves laterally under the drive of the driving motor 23, and when the receiving plate 7 and the vulcanization box 20 are in a facing position, the hydraulic cylinder 5 is used to drive the vulcanization box 20 to move down and close between the receiving plate 7, and the vulcanization box 20 is used to perform vulcanization treatment on the silicone.

[0068] The above is a preferred specific implementation manner of the present invention, and the protection scope of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by any technician familiar with the field within the technical scope disclosed by the present invention in combination with the prior art or public common sense, within the spirit and principle of the present invention, shall be covered by the protection scope of the present invention.

Claims

1. A process for preparing colorful silica gel, characterized in that: The following steps are involved: S1: Raw material mixing: Mix the silica gel raw materials and various additives evenly to make silica gel mixture; S2: Raw material pressing: the mixed material is pressed into a certain shape by calendering; S3: Laser: The mold is processed by laser to produce a colorful effect; S4: Vulcanization: Put the laser-treated silicone products into the vulcanization furnace and vulcanize them under high temperature and high pressure; S5: Silicone cooling: Take out the vulcanized silicone products and place them in a ventilated place for natural cooling until the temperature drops to room temperature; S6: Silicone trimming: After the silicone is cooled, the small amount of silicone particles remaining on its edge are trimmed; S7: Silicone dust removal: Use an air gun to blow and remove dust from the silicone surface; S8: Silica gel packaging: Pack and store the silica gel products after dust removal.

2. A colorful silica gel preparation device, prepared by the colorful silica gel preparation process according to claim 1, characterized in that: The invention comprises a base (1) and a laser part and a vulcanization part for laser-processing silicone. A U-shaped frame (11) is fixed to the top outer wall of the base (1), and a driving motor (18) is fixed to the top inner wall of the U-shaped frame (11). The output end of the driving motor (18) is connected to a driving rod (13) through a coupling, and a supporting plate (19) is fixed to the outer wall of the driving rod (13) through a pin, and a guide hole (17) is provided on the surface of the supporting plate (19). The circumferential outer wall of the driving rod (13) is movably connected to a rotating disk (2), and a material hole (15) is provided on the surface of the rotating disk (2). A torsion spring (12) is sleeved on the circumferential outer wall of the driving rod (13), and two ends of the torsion spring (12) are respectively fixed to the top of the rotating disk (2) and the circumferential outer wall of the driving rod (13), and a positioning plate (14) for positioning the silicone is placed inside the material hole (15).

3. A colorful silica gel preparation device according to claim 2, characterized in that: The laser part comprises a bracket (3) and a laser head (4); the bracket (3) is fixed to the top outer wall of the base (1), and the laser head (4) is fixed to the top outer wall of the bracket (3).

4. A colorful silica gel preparation device according to claim 3, characterized in that: The vulcanization section comprises a vacuum vulcanization mechanism and a moving mechanism, the vacuum vulcanization mechanism comprises a hydraulic cylinder (5) and a support frame (6), the support frame (6) is fixed to the top outer wall of the base (1), and the hydraulic cylinder (5) is fixed to the top outer wall of the support frame (6), and the output end of the hydraulic cylinder (5) is fixed with a vulcanization box (20) through a pin.

5. A colorful silica gel preparation device according to claim 4, characterized in that: An extension plate (25) is fixed to the outer wall of one side of the vulcanization box (20), and a limit head (24) is welded to the bottom of the extension plate (25). A contact plate (16) used in conjunction with the limit head (24) is fixed to the circumferential outer wall of the turntable (2).

6. A colorful silica gel preparation device according to claim 5, characterized in that: The moving mechanism comprises a sliding frame (8) and a sliding seat (21); the sliding frame (8) is fixed to the top outer wall of the base (1); the sliding seat (21) is movably connected to the outer wall of the sliding frame (8); and a lifting piece is fixed to the top of the sliding seat (21).

7. The device for preparing colorful silica gel according to claim 6, characterized in that: A vertical plate (10) is fixed to the top outer wall of the base (1), a threaded rod (9) is movably connected between the two vertical plates (10), a second drive motor (23) is fixed to the outer wall of one side of the vertical plate (10), and the output end of the second drive motor (23) is connected to one end of the threaded rod (9) through a coupling, and the sliding seat (21) and the threaded rod (9) are threadedly connected.

8. The device for preparing colorful silica gel according to claim 7, characterized in that: The lifting member comprises a frame (30), a rotating shaft (31) and a swinging plate (28); the frame (30) is welded to the outer wall of the top of the sliding seat (21), and the rotating shaft (31) is movably connected to the inner wall of a through hole opened on the surface of the frame (30); the swinging plate (28) is welded to the circumferential outer wall of the rotating shaft (31), and a receiving plate (7) is welded to the top of the swinging plate (28); the outer wall of the rotating shaft (31) is sleeved with a second torsion spring (29), and the two ends of the second torsion spring (29) are respectively clamped to one side of the frame (30) and the end of the rotating shaft (31).

9. The device for preparing colorful silica gel according to claim 8, characterized in that: A positioning column (27) is welded to the outer wall of the top of the receiving plate (7), and a positioning groove (26) matching the outer diameter of the positioning column (27) is provided at the bottom of the vulcanizing box (20).

10. The device for preparing colorful silica gel according to claim 9, characterized in that: A accommodating frame (32) is fixed to the top outer wall of the receiving plate (7), and rollers (22) are movably connected between the inner walls on both sides of the accommodating frame (32).

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