Pressing machine with safety protection mechanism
By introducing protective components and an automatic ejection structure into the press, the safety and stability issues of the press are solved, achieving both safety protection and efficient production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING JINGHAO PRECISION TECHNOLOGY CO LTD
- Filing Date
- 2025-04-27
- Publication Date
- 2026-05-29
Smart Images
Figure CN224296682U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of pressing equipment, specifically a pressing machine with a safety protection mechanism. Background Technology
[0002] A pressing machine is a piece of equipment that presses materials into shape. Its main function is to change the shape and density of raw materials by pressing them, thereby achieving the purpose of manufacturing the desired product. Pressing machines are widely used in production fields such as machinery manufacturing, automobile industry, cement industry, steel industry, and shipbuilding to produce different types of products.
[0003] The staff places the material to be processed onto the worktable of the pressing machine, adjusts the position of the pressing plate or worktable to ensure the material is correctly aligned, and then presses the pressing button to start the pressing machine and press the material.
[0004] Through long-term use and observation, it has been found that installing a protective mechanism on the outside of the press can protect the key components of the press from damage by the external environment during the pressing operation of materials.
[0005] Therefore, this utility model provides a pressing machine with a safety protection mechanism. Utility Model Content
[0006] To overcome the shortcomings of the prior art and solve at least one of the problems mentioned in the background art, a pressing machine with a safety protection mechanism is proposed.
[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: A pressing machine with a safety protection mechanism, comprising a worktable, a vertical plate fixed to the top side wall of the worktable, a top plate fixed to the top side wall of the vertical plate, an electric push rod mounted on the top side wall of the top plate, a first movable shaft fixedly connected to the output end of the electric push rod, an upper pressure head mounted on the bottom side wall of the first movable shaft, a pop-out component provided in the middle of the side wall of the first movable shaft, a pair of grooves opened in the middle of the side wall of the worktable, a motor fixedly connected to the middle of the side wall of the worktable, a synchronous belt driven to the output end of the motor, a movable rod driven to the middle of the inner side wall of the synchronous belt, a first threaded rod fixedly connected to the movable rod and the output end of the motor, the first threaded rod rotating inside the groove, a pair of first movable rings slidably connected to the middle of the side wall of the first threaded rod, a lower pressure seat mounted in the middle of the side wall of the first movable rings, a limiting component provided in the middle of the side wall of the lower pressure seat, a pair of support seats fixedly connected to the bottom side wall of the worktable, and a protective component provided on the bottom side wall of the top plate, the protective component including a first fixed... The first fixed plate is a pair symmetrically arranged on the side wall of the workbench. A first bevel gear is fixed on the motor output end and the side wall of the movable rod. A second bevel gear is meshed with the first bevel gear and rotates on the side wall of the first fixed plate. A second threaded rod is fixedly connected to the middle of the side wall of the second bevel gear. A pair of second movable rings are slidably connected to the middle of the side wall of the second threaded rod. A protective plate is assembled at the end of the second movable ring. A protective cover is fixed between the protective plate and the workbench. The protective cover is made of elastic material. This step, by setting the first bevel gear, the second bevel gear, the second threaded rod, the second movable ring, the protective plate, and the protective cover, can isolate the dangers generated by the external moving parts of the press machine during operation from the workers, preventing personnel from accidentally coming into contact with rotating, moving, or high-temperature parts, thereby reducing accidental injuries such as pinching and burns. In addition, this setting can also protect the key components of the press machine from damage from the external environment, such as dust and moisture, which helps to maintain the stable performance of the equipment, extend its service life, and reduce downtime caused by equipment failure.
[0008] Preferably, the ejector assembly includes a second movable shaft, which is fixed to the side wall of the first movable shaft. A push plate is fixed to the other end of the second movable shaft. The push plate is located below the lower pressure seat. An ejector rod is fixed to the top side wall of the push plate. A slot is provided in the middle of the side wall of the lower pressure seat. The slot and the ejector rod are correspondingly arranged. This step, by setting the second movable shaft, push plate, ejector rod and slot, can eject the pressed material from the press, reducing the time for manual material handling and thus improving production efficiency. In addition, this setting reduces the need for workers to directly contact the inside of the press or the high temperature and high pressure material, thereby reducing the risk of injury to the operators.
[0009] Preferably, the limiting component includes a second fixing plate, which is fixed to the inner wall of the slot. A connecting rod is fixed to the middle of the side wall of the second fixing plate, and a movable plate is rotatably connected to the middle of the side wall of the connecting rod. A torsion spring is provided between the connecting rod and the movable plate, and the movable plate rotates inside the slot. This step, by setting the second fixing plate, the connecting rod, and the movable plate, can prevent the material from being pressed into the slot during the pressing process, which would cause the molded product to fail to meet the standards, thereby maintaining the continuity and stability of the production process.
[0010] Preferably, an oil reservoir is fixedly connected to the middle of the inner sidewall of the groove, and an inlet pipe is fixed to the top sidewall of the oil reservoir. Both the oil reservoir and the inlet pipe are hollow and connected. Multiple sieve holes are opened in the middle of the sidewall of the oil reservoir. By setting the oil reservoir and the inlet pipe, a lubricating film can be formed on the contact surface of the first threaded rod, thereby reducing friction between the threads, reducing wear during movement, making the rotation smoother and more efficient, helping to improve the overall operating efficiency of the press, and reducing energy loss caused by frictional resistance.
[0011] Preferably, an elastic pad is fixed to the top side wall of the ejector rod. The elastic pad is made of elastic material. This step, by setting the elastic pad, can absorb and disperse the impact force generated during the ejection process, thereby playing a role in buffering and shock absorption, which helps to protect the material from damage and improve the yield and quality of the product.
[0012] Preferably, an observation window is provided in the middle of the side wall of the protective cover. The observation window is made of transparent material. This step allows for a clear observation of the working conditions inside the pressing machine, including the pressing process of the material and the operating status of the equipment. This facilitates real-time monitoring of the work process by the staff and further ensures the smooth progress of the production process.
[0013] The beneficial effects of this utility model are as follows:
[0014] 1. The pressing machine with a safety protection mechanism described in this utility model, by setting a first bevel gear, a second bevel gear, a second threaded rod, a second movable ring, a protective plate, and a protective cover, can isolate the dangers generated by the external moving parts of the pressing machine during operation from the workers, preventing personnel from accidentally coming into contact with rotating, moving, or high-temperature parts, thereby reducing accidental injuries such as pinching and burns. In addition, this setting can also protect the key components of the pressing machine from damage from the external environment, such as dust and moisture, which helps to maintain the stable performance of the equipment, extend its service life, and reduce downtime caused by equipment failure.
[0015] 2. The pressing machine with a safety protection mechanism described in this utility model can eject the pressed material from the pressing machine by setting a second movable shaft, a push plate, a ejector rod and a slot, which reduces the time for manual material handling and thus improves production efficiency. In addition, this setting reduces the need for workers to directly contact the inside of the pressing machine or the high temperature and high pressure materials, thereby reducing the risk of injury to the operators. Attached Figure Description
[0016] The present invention will be further described below with reference to the accompanying drawings.
[0017] Figure 1 This is a perspective view of the present invention;
[0018] Figure 2 This is a schematic diagram of the cooperation structure between the second movable shaft and the electric actuator in this utility model;
[0019] Figure 3 This is a schematic diagram of the cooperation structure between the lower pressure seat and the ejector rod in this utility model;
[0020] Figure 4 yes Figure 2 Enlarged view of a portion of point A in the middle.
[0021] Legend:
[0022] 1. Workbench; 11. Vertical plate; 12. Top plate; 13. Electric actuator; 14. First movable shaft; 15. Upper pressure head; 16. Groove; 17. Motor; 18. Synchronous belt; 19. Movable rod; 110. First threaded rod; 111. First movable ring; 112. Lower pressure seat; 113. Support seat; 2. First fixed plate; 21. First bevel gear; 22. Second bevel gear; 23. Second threaded rod; 24. Second movable ring; 25. Protective plate; 26. Protective cover; 3. Second movable shaft; 31. Push plate; 32. Pop-out rod; 33. Groove; 4. Second fixed plate; 41. Connecting rod; 42. Movable plate; 5. Oil reservoir; 51. Liquid inlet pipe; 6. Elastic pad; 7. Observation window. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0024] Specific implementation examples are given below.
[0025] like Figures 1 to 4As shown, a pressing machine with a safety protection mechanism according to an embodiment of the present invention includes a worktable 1, a vertical plate 11 fixed to the top side wall of the worktable 1, a top plate 12 fixed to the top side wall of the vertical plate 11, an electric push rod 13 mounted on the top side wall of the top plate 12, a first movable shaft 14 fixedly connected to the output end of the electric push rod 13, an upper pressure head 15 mounted on the bottom side wall of the first movable shaft 14, a pop-out component provided in the middle of the side wall of the first movable shaft 14, a pair of grooves 16 formed in the middle of the side wall of the worktable 1, a motor 17 fixedly mounted in the middle of the side wall of the worktable 1, and a synchronous belt 18 connected to the output end of the motor 17. A movable rod 19 is connected to the middle of the inner wall of the stepper belt 18. A first threaded rod 110 is fixedly connected to the output end of the motor 17 and the movable rod 19. The first threaded rod 110 rotates inside the groove 16. A pair of first movable rings 111 are slidably connected to the middle of the side wall of the first threaded rod 110. A lower pressure seat 112 is assembled in the middle of the side wall of the first movable ring 111. A limiting component is provided in the middle of the side wall of the lower pressure seat 112. A pair of support seats 113 are fixedly connected to the bottom side wall of the worktable 1. A protective component is provided in the bottom side wall of the top plate 12. During operation, the operator places the material to be pressed on the top of the lower pressure seat 112, and then... When motor 17 is started, it drives the first threaded rod 110 and the synchronous belt 18 to rotate simultaneously. The rotation of the synchronous belt 18 causes the movable rod 19 to rotate, which in turn causes the first threaded rod 110, which is fixed to its end, to rotate synchronously. As the first threaded rod 110 rotates, a pair of first movable rings 111 on its sidewall slide on it, causing the first movable rings 111 to move synchronously with the lower pressure seat 112. At this time, the material placed on top of the lower pressure seat 112 moves with the lower pressure seat 112 until it moves below the upper pressure head 15. When the threaded rod 110 rotates, it will cause the protective component to rotate as well. At this time, the protective component will cover the workbench 1, the upright plate 11, and the top plate 12. Then, the operator will start the electric push rod 13, which will drive the first movable shaft 14 to move downward. When the first movable shaft 14 moves downward, it will also move the upper pressure head 15 downward in sync until the upper pressure head 15 presses against the top of the lower pressure seat 112 to perform the pressing operation. When the first movable shaft 14 moves upward under the drive of the electric push rod 13, the ejector component will move upward at the same time and eject the pressed material from the top of the lower pressure seat 112 under the restriction of the limiting component.
[0026] like Figure 1 , Figure 2 and Figure 4As shown, the protective assembly includes a first fixed plate 2, which is a pair symmetrically arranged on the side wall of the workbench 1. A first bevel gear 21 is fixed to the output end of the motor 17 and the side wall of the movable rod 19. A second bevel gear 22 meshes with the first bevel gear 21 and rotates on the side wall of the first fixed plate 2. A second threaded rod 23 is fixedly connected to the middle of the side wall of the second bevel gear 22. A pair of second movable rings 24 are slidably connected to the middle of the side wall of the second threaded rod 23. A protective plate 25 is fitted to the end of each second movable ring 24. A protective cover 26 is fixed between the protective plate 25 and the workbench 1. The protective cover 26 is made of elastic material. During operation, the rotation of the first threaded rod 110 will cause the first bevel gear 21 to rotate. Because the first bevel gear 21 and the second bevel gear 22 are meshed, the rotation of the first bevel gear 21 will cause the second bevel gear 22 to rotate, and the rotation of the second bevel gear 22 will cause the second threaded rod 23 to rotate. When the second threaded rod 23 rotates, a pair of second movable rings 24 on its side wall slide on the second threaded rod 23, causing the second movable rings 24 to move synchronously with the protective plate 25. When the protective plate 25 moves, the protective cover 26 is lifted, and at this time the protective cover 26 covers the outside of the worktable 1, the upright plate 11 and the top plate 12. This step, by setting the first bevel gear 21, the second bevel gear 22, the second threaded rod 23, the second movable rings 24, the protective plate 25 and the protective cover 26, can isolate the dangers generated by the external moving parts of the press machine in operation from the workers, prevent the workers from accidentally coming into contact with rotating, moving or high-temperature parts, thereby reducing accidental injuries such as pinching and burns. In addition, this setting can also protect the key components of the press machine from damage from the external environment, such as dust and moisture, which helps to maintain the stable performance of the equipment, extend its service life and reduce downtime caused by equipment failure.
[0027] like Figure 2 and Figure 3As shown, the ejector assembly includes a second movable shaft 3, which is fixed to the side wall of the first movable shaft 14. A push plate 31 is fixed to the other end of the second movable shaft 3, located below the lower pressure seat 112. An ejector rod 32 is fixed to the top side wall of the push plate 31. A slot 33 is provided in the middle of the side wall of the lower pressure seat 112, corresponding to the ejector rod 32. During operation, after the pressing machine finishes its work, the first movable shaft 14 moves upward under the drive of the electric push rod 13. The movement of the first movable shaft 14 drives the second movable shaft 3 to move, and the movement of the second movable shaft 3 carries the push plate. 31 and ejector rod 32 move upward synchronously. Since ejector rod 32 and slot 33 are correspondingly set, ejector rod 32 will slide inside slot 33, causing ejector rod 32 to eject the material that is pressed tightly against the surface of lower pressure seat 112. This step, by setting the second movable shaft 3, push plate 31, ejector rod 32 and slot 33, can eject the pressed material from the press, reducing the time for manual material handling, thereby improving production efficiency. In addition, this setting reduces the need for workers to directly contact the inside of the press or the high temperature and high pressure material, thereby reducing the risk of injury to operators.
[0028] like Figure 1 and Figure 3 As shown, the limiting component includes a second fixed plate 4, which is fixed to the inner wall of the slot 33. A connecting rod 41 is fixed to the middle of the side wall of the second fixed plate 4, and a movable plate 42 is rotatably connected to the middle of the side wall of the connecting rod 41. A torsion spring is provided between the connecting rod 41 and the movable plate 42. The movable plate 42 rotates inside the slot 33. During operation, when the ejector rod 32 slides inside the slot 33, it will squeeze the movable plate 42, causing the movable plate 42 to rotate on the side wall of the connecting rod 41. Then, the ejector rod 32 pushes open the movable plate 42, pushing out the material that is pressed tightly against the surface of the lower pressure seat 112. When the ejector rod 32 no longer squeezes the movable plate 42, because there is a torsion spring between the movable plate 42 and the connecting rod 41, the movable plate 42 will cover the top of the slot 33. This step, by setting the second fixed plate 4, the connecting rod 41 and the movable plate 42, can prevent the material from being pressed into the slot 33 during the pressing process, which would cause the molded product to not meet the standards, thereby maintaining the continuity and stability of the production process.
[0029] like Figure 1 , Figure 2 and Figure 4As shown, an oil reservoir 5 is fixedly connected to the middle of the inner sidewall of the groove 16, and an inlet pipe 51 is fixed to the top sidewall of the oil reservoir 5. Both the oil reservoir 5 and the inlet pipe 51 are hollow and connected. Multiple sieve holes are opened in the middle of the sidewall of the oil reservoir 5. During operation, the operator injects lubricating fluid into the oil reservoir 5 through the inlet pipe 51. When the first movable ring 111 moves inside the groove 16, it will squeeze the oil reservoir 5, causing the lubricating fluid inside the oil reservoir 5 to flow out through the sieve holes, so that the lubricating fluid is fully coated on the surface of the first threaded rod 110. This step, by setting the oil reservoir 5 and the inlet pipe 51, can form a lubricating film on the contact surface of the first threaded rod 110, thereby reducing the friction between the threads, reducing wear during movement, making the rotation smoother and more efficient, helping to improve the overall operating efficiency of the press, and reducing energy loss caused by frictional resistance.
[0030] like Figure 3 As shown, an elastic pad 6 is fixed to the top side wall of the ejector rod 32. The elastic pad 6 is made of elastic material. By setting the elastic pad 6, this step can absorb and disperse the impact force generated during the ejection process, thereby playing a role in buffering and shock absorption, which helps to protect the material from damage and improve the yield and quality of the product.
[0031] like Figure 1 and Figure 2 As shown, an observation window 7 is provided in the middle of the side wall of the protective cover 26. The observation window 7 is made of transparent material. By setting the observation window 7, the working conditions inside the pressing machine can be clearly observed, including the pressing process of the material and the operating status of the equipment. This makes it convenient for staff to monitor the work process in real time and further ensure the smooth progress of the production process.
[0032] Working principle: The operator places the material to be pressed on top of the lower pressure seat 112, and then starts the motor 17. The motor 17 drives the first threaded rod 110 and the synchronous belt 18 to rotate simultaneously. When the synchronous belt 18 rotates, it drives the movable rod 19 to rotate. When the movable rod 19 rotates, it drives the first threaded rod 110, which is fixed to its end, to rotate synchronously. When the first threaded rod 110 rotates, a pair of first movable rings 111 on its side wall slide on the first threaded rod 110, causing the first movable rings 111 to move synchronously with the lower pressure seat 112. At this time, the material placed on top of the lower pressure seat 112 will move with the movement of the lower pressure seat 112 until it moves below the upper pressure head 15. When the first threaded rod 110 rotates, it drives the protective component to rotate. At this time, the protective component... The protective assembly covers the workbench 1, the upright plate 11, and the top plate 12. Then, the operator activates the electric actuator 13, which drives the first movable shaft 14 downwards. As the first movable shaft 14 moves downwards, it also moves the upper pressure head 15 downwards simultaneously until the upper pressure head 15 presses against the top of the lower pressure seat 112, compressing the material. When the first movable shaft 14 moves upwards under the drive of the electric actuator 13, the ejector assembly moves upwards simultaneously and, under the constraint of the limiting assembly, ejects the compressed material from the top of the lower pressure seat 112. The rotation of the first threaded rod 110 causes the first bevel gear 21 to rotate. Because the first bevel gear 21 and the second bevel gear 22 are meshed, the rotation of the first bevel gear 21 causes the second bevel gear 22 to rotate, and the rotation of the second bevel gear 22... When the machine rotates, it will cause the second threaded rod 23 to rotate as well. When the second threaded rod 23 rotates, a pair of second movable rings 24 on its side wall will slide on the second threaded rod 23, causing the second movable rings 24 to move synchronously with the protective plate 25. When the protective plate 25 moves, the protective cover 26 will be lifted, and at this time the protective cover 26 will cover the outside of the worktable 1, the upright plate 11 and the top plate 12. When the press machine finishes its operation, the first movable shaft 14 will move upward under the drive of the electric push rod 13. When the first movable shaft 14 moves, it will drive the second movable shaft 3 to move. When the second movable shaft 3 moves, it will cause the push plate 31 and the ejector rod 32 to move upward synchronously. Because the ejector rod 32 is correspondingly set with the slot 33, the ejector rod 32 will slide inside the slot 33, so that the ejector rod 32 will press the pressed part of the slot 33. The material adhering to the surface of the lower pressure seat 112 is ejected. When the ejector rod 32 slides inside the groove 33, it will squeeze the movable plate 42, causing the movable plate 42 to rotate on the side wall of the connecting rod 41. Then the ejector rod 32 pushes open the movable plate 42, pushing out the material that is pressed and adhering to the surface of the lower pressure seat 112. When the ejector rod 32 no longer squeezes the movable plate 42, because there is a torsion spring between the movable plate 42 and the connecting rod 41, the movable plate 42 will cover the top of the groove 33. The operator has injected lubricating fluid into the oil storage bladder 5 through the liquid inlet pipe 51 in advance. When the first movable ring 111 moves inside the groove 16, it will squeeze the oil storage bladder 5, causing the lubricating fluid inside the oil storage bladder 5 to flow out through the sieve holes, so that the lubricating fluid is fully coated on the surface of the first threaded rod 110.
[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A pressing machine with a safety protection mechanism, comprising a worktable (1), characterized in that: A vertical plate (11) is fixed to the top side wall of the workbench (1), and a top plate (12) is fixed to the top side wall of the vertical plate (11). An electric push rod (13) is mounted on the top side wall of the top plate (12). A first movable shaft (14) is fixed to the output end of the electric push rod (13). An upper pressure head (15) is mounted on the bottom side wall of the first movable shaft (14). A pop-out component is provided in the middle of the side wall of the first movable shaft (14). A pair of grooves (16) are opened in the middle of the side wall of the workbench (1). A motor (17) is fixed in the middle of the side wall of the workbench (1). A synchronous belt (18) is connected to the output end of the motor (17). A movable rod (19) is connected to the middle of the inner side wall of the synchronous belt (18). The movable rod (19) and the output end of the motor (17) are fixedly connected to a first threaded rod (110). The first threaded rod (110) rotates inside the groove (16). A pair of first movable rings (111) are slidably connected to the middle of the side wall of the first threaded rod (110). A lower pressure seat (112) is assembled in the middle of the side wall of the first movable ring (111). A limiting component is provided in the middle of the side wall of the lower pressure seat (112). A pair of support seats (113) are fixedly connected to the bottom side wall of the worktable (1). A protective component is provided in the bottom side wall of the top plate (12).
2. A pressing machine with a safety protection mechanism according to claim 1, characterized in that: The protective assembly includes a first fixed plate (2), which is a pair and symmetrically arranged on the side wall of the workbench (1). A first bevel gear (21) is fixed on the output end of the motor (17) and the side wall of the movable rod (19). A second bevel gear (22) is meshed with the first bevel gear (21). The second bevel gear (22) rotates on the side wall of the first fixed plate (2). A second threaded rod (23) is fixedly connected to the middle of the side wall of the second bevel gear (22). A pair of second movable rings (24) are slidably connected to the middle of the side wall of the second threaded rod (23). A protective plate (25) is assembled at the end of the second movable ring (24). A protective cover (26) is fixed between the protective plate (25) and the workbench (1). The protective cover (26) is made of elastic material.
3. A pressing machine with a safety protection mechanism according to claim 1, characterized in that: The pop-out assembly includes a second movable shaft (3), which is fixed on the side wall of the first movable shaft (14). A push plate (31) is fixed to the other end of the second movable shaft (3). The push plate (31) is located below the lower pressure seat (112). A pop-out rod (32) is fixed to the top side wall of the push plate (31). A slot (33) is provided in the middle of the side wall of the lower pressure seat (112). The slot (33) and the pop-out rod (32) are correspondingly arranged.
4. A pressing machine with a safety protection mechanism according to claim 1, characterized in that: The limiting component includes a second fixing plate (4), which is fixed on the inner wall of the slot (33). A connecting rod (41) is fixed in the middle of the side wall of the second fixing plate (4). A movable plate (42) is rotatably connected in the middle of the side wall of the connecting rod (41). A torsion spring is provided between the connecting rod (41) and the movable plate (42). The movable plate (42) rotates inside the slot (33).
5. A pressing machine with a safety protection mechanism according to claim 1, characterized in that: An oil storage bladder (5) is fixedly connected to the middle of the inner sidewall of the groove (16). An inlet pipe (51) is fixed to the top sidewall of the oil storage bladder (5). The oil storage bladder (5) and the inlet pipe (51) are both hollow and connected. Multiple sieve holes are opened in the middle of the sidewall of the oil storage bladder (5).
6. A pressing machine with a safety protection mechanism according to claim 3, characterized in that: An elastic pad (6) is fixed to the top side wall of the ejector rod (32), and the elastic pad (6) is made of elastic material.
7. A pressing machine with a safety protection mechanism according to claim 2, characterized in that: The protective cover (26) has an observation window (7) in the middle of its side wall, and the observation window (7) is made of transparent material.