An arrangement for threading a ring-shaped ferrite product

Abstract

The utility model discloses a kind of arrangement of annular ferrite product's row rod machine, including workbench, the top of workbench is equipped with whole column component, the discharge end side of whole column component is equipped with conveying belt, reversing block is installed above conveying belt in whole column component one end, the side of conveying belt other end is equipped with bunker, the top of bunker is equipped with material shifting component. Compared with prior art by manual operation of staff, the present application can avoid direct contact between staff and annular ferrite product, thereby avoiding hand sweat from landing on the product, improving yield, reducing labor intensity, improving work efficiency, and the same number of metal rods are worn on each, facilitating management.

Description

Technical Field

[0001] This disclosure belongs to the field of rod arrangement technology, specifically relating to a rod arrangement machine for annular ferrite products. Background Technology

[0002] The key processes in producing ferrite products include forming, sintering, sorting, and packaging. Among these, the sorting process for producing ring-shaped products requires inspecting the appearance defects on the outer surface of the ring-shaped product.

[0003] Currently, the most efficient method is for employees to use a metal rod to neatly arrange the products one by one, thread them together, and roll them to check for surface defects on the ring-shaped products, ensuring no defects are missed. This is currently all manual work, which is inefficient. Furthermore, sweaty hands from employees can easily cause quality defects on the products.

[0004] Chinese Patent Publication CN112297118B discloses a round foam rod threading machine, relating to the field of sponge processing machinery technology. It includes a first base, a drilling rod, a central shaft, a feeding hopper, a linear slide rail, a first lead screw, a first nut sleeve, a first support rod, a support frame, a first sliding sleeve, a hollow knife, a drilling rod drive mechanism, and a first lead screw drive mechanism. A round foam rod threading and rotary cutting production line is also provided, comprising the round foam rod threading machine, a robotic transfer mechanism, and a rotary cutting machine. The robotic transfer mechanism transfers the round foam body threaded with the central shaft to the rotary cutting station of the rotary cutting machine. This invention provides a round foam rod threading machine and a round foam rod threading and rotary cutting production line. The rod threading machine achieves integrated and mechanized processing of drilling and rod threading of round foam bodies, and the production line realizes streamlined operations for drilling, rod threading, and rotary cutting of round foam bodies.

[0005] Chinese patent announcement CN108237381B discloses an automatic rod threading machine, which solves the problem of low efficiency and high labor costs caused by the need for manual threading of existing washing machine hanging rod assemblies. The machine includes a frame, on which a conveyor belt is provided and a manual feeding station, a rod threading mechanism, a bending mechanism, a positioning and guiding mechanism, and a unloading mechanism are arranged in sequence. The conveyor belt is provided with a feeding mold, which is driven by the conveyor belt to pass through the manual feeding station, the rod threading mechanism, the bending mechanism, the positioning and guiding mechanism, and the unloading mechanism in sequence. This invention realizes automatic rod threading, which not only improves the threading efficiency but also reduces labor costs.

[0006] It is evident that although the aforementioned patents disclose rod-transferring machines, none of them are applicable to the arrangement and rod-transferring of toroidal ferrite products. Therefore, there is an urgent need for a rod-transferring machine for toroidal ferrite products, which can facilitate the arrangement and rod-transferring of toroidal ferrite products, improve work efficiency, and reduce labor intensity. Utility Model Content

[0007] The purpose of this disclosure is to provide a rod-threading machine for arranging toroidal ferrite products to solve the problems mentioned in the background art. The rod-threading machine for arranging toroidal ferrite products provided by this disclosure is characterized by facilitating the rod-threading of toroidal ferrite products, improving work efficiency, and reducing labor intensity.

[0008] To achieve the above objectives, this disclosure provides the following technical solution: a rod-threading machine for arranging annular ferrite products, including a workbench, an arranging assembly mounted above the workbench, a conveyor belt on the discharge end side of the arranging assembly, a reversing block mounted above one end of the conveyor belt, a hopper on one side of the other end of the conveyor belt, and a feeding assembly above the hopper.

[0009] In order to convey the toroidal ferrite products backward in a uniform direction, the assembly further includes a base plate, an inclined feeding conveyor belt installed above the base plate, a hopper installed above the feeding conveyor belt, a slide rail installed at the output end of the feeding conveyor belt, and a vibratory feeder installed below the slide rail. The vibratory feeder is connected to the PLC controller.

[0010] To reduce friction between the toroidal ferrite product and the vibratory feeder, thereby reducing defects in the toroidal ferrite product, a soft rubber sheet is further laid on the conveying track of the vibratory feeder.

[0011] To detect the amount of product in the vibratory feeder and prevent overflow due to excessive product, a full-load sensor is installed above the vibratory feeder, and the full-load sensor is connected to the PLC controller.

[0012] In order to move the annular ferrite products arranged on the conveyor belt to the hopper, the material moving assembly further includes a support base, two parallel synchronous belts are installed on the top of the support base, a motor for driving the synchronous belts is also installed on the support base, and several equally spaced connecting blocks are connected to the surface of the synchronous belts, with a lever connecting between corresponding two connecting blocks.

[0013] To facilitate operation by employees, the hopper further includes a horizontal section and an inclined section, wherein the horizontal section is located on the side closer to the conveyor belt.

[0014] To prevent the retaining edge from blocking the inner ring of the annular ferrite product, retaining edges are further provided on both sides of the horizontal and inclined portions, wherein the height of the retaining edge on the inclined portion is less than the ring width of the annular ferrite product.

[0015] To prevent the vertically positioned annular ferrite products from tipping over due to conveying or vibration, a magnetic block is further provided below the conveying surface of the conveyor belt, and a baffle is provided on the conveyor belt.

[0016] To trigger the material feeding assembly, a material feeding sensor is further installed on one side of the conveyor belt, and the material feeding sensor is connected to the PLC controller signal.

[0017] To achieve reversal of the toroidal ferrite product, the feed inlet and outlet of the reversing block are further set at 90°.

[0018] Compared with the prior art, the beneficial effects of this disclosure are:

[0019] 1. Compared with the manual operation by employees in the prior art, this disclosure can avoid direct contact between employees and toroidal ferrite products, thereby avoiding sweat from the palms getting on the products, improving the yield, reducing labor intensity, improving work efficiency, and the same number of rods are threaded on each metal rod, which facilitates management.

[0020] 2. The conveying track of the vibratory feeder disclosed herein is covered with soft rubber, which can reduce the friction between the toroidal ferrite product and the vibratory feeder, thereby reducing the defects of the toroidal ferrite product.

[0021] 3. This disclosure achieves the transfer of the annular ferrite products arranged on the conveyor belt to the hopper by setting up the material feeding component.

[0022] 4. The disclosed hopper includes a horizontal section and an inclined section. The horizontal section is located on the side close to the conveyor belt, and the inclined section facilitates operation by employees.

[0023] 5. The conveyor belt of this invention has a magnetic block below the conveying surface and a baffle on the conveyor belt, which can prevent the vertical annular ferrite product from tipping over due to conveying or vibration.

[0024] 6. The feed inlet and discharge outlet of the reversing block disclosed herein are set at 90°, and a reversing channel is provided between the feed inlet and discharge outlet to realize the reversing of the annular ferrite product by means of gravity. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure disclosed herein.

[0026] Figure 2 This is a schematic diagram of the structure of the array components disclosed herein.

[0027] Figure 3 This is a schematic diagram of the material feeding assembly disclosed herein.

[0028] Figure 4 This is a schematic diagram of the structure of the material silo disclosed in this publication.

[0029] Figure 5 This is a schematic diagram of the commutator block of this disclosure.

[0030] In the diagram: 1. Workbench; 2. Reversing block; 3. Conveyor belt; 4. Material feeding sensor; 5. Material feeding assembly; 51. Support base; 52. Synchronous belt; 53. Motor; 54. Paddle; 55. Connecting block; 6. Hopper; 61. Horizontal section; 62. Inclined section; 7. Alignment assembly; 71. Base plate; 72. Feeding conveyor belt; 73. Hopper; 74. Slide rail; 75. Soft rubber sheet; 76. Full material sensor; 77. Vibratory feeder. Detailed Implementation

[0031] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0032] In the description of this disclosure, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0033] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this disclosure, the terms "upper," "lower," "right," "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings, and are used only for ease of description and simplification of operation. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. Furthermore, the terms "first" and "second" are used only for descriptive distinction and have no special meaning.

[0035] Example 1

[0036] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This embodiment provides the following technical solution: a rod-threading machine for arranging annular ferrite products, including a workbench 1, an arranging assembly 7 installed above the workbench 1, a conveyor belt 3 provided on the discharge end side of the arranging assembly 7, a reversing block 2 installed above one end of the conveyor belt 3, a hopper 6 provided on one side of the other end of the conveyor belt 3, a feeding assembly 5 provided above the hopper 6, a limit baffle installed on one end of the conveyor belt 3 at the feeding assembly 5, used to limit the annular ferrite products, so that the annular ferrite products are arranged on the conveyor belt 3, and the drive motor of the conveyor belt 3 is connected to the PLC controller signal.

[0037] By adopting the above technical solution, this disclosure uses the aligning assembly 7 to convey the annular ferrite products backward in a uniform direction. After the annular ferrite products are reversed by the reversing block 2, they are arranged on the conveyor belt 3 and then moved to the hopper 6 by the feeding assembly 5. At the hopper 6, employees use metal rods to thread the arranged annular ferrite products. Compared with the manual operation of employees in the prior art, this disclosure can avoid direct contact between employees and annular ferrite products, thereby avoiding sweat from the palms getting on the products, improving the yield, reducing labor intensity, and improving work efficiency. In addition, the number of products threaded on each metal rod is the same, which facilitates management.

[0038] Example 2

[0039] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This embodiment provides the following technical solution: a rod-threading machine for arranging annular ferrite products, including a workbench 1, an arranging assembly 7 installed above the workbench 1, a conveyor belt 3 provided on the discharge end side of the arranging assembly 7, a reversing block 2 installed above one end of the conveyor belt 3, a hopper 6 provided on one side of the other end of the conveyor belt 3, a feeding assembly 5 provided above the hopper 6, a limit baffle installed on one end of the conveyor belt 3 at the feeding assembly 5, used to limit the annular ferrite products, so that the annular ferrite products are arranged on the conveyor belt 3, and the drive motor of the conveyor belt 3 is connected to the PLC controller signal.

[0040] For details, please refer to Figure 2The assembly assembly 7 includes a base plate 71, an inclined feeding conveyor belt 72 mounted on the base plate 71, a hopper 73 mounted on the feeding conveyor belt 72, a slide rail 74 mounted on the output end of the feeding conveyor belt 72, and a vibratory feeder 77 located below the slide rail 74. The assembly assembly 7 also includes a speed controller and a frequency converter. The speed controller is used to adjust the conveying speed of the feeding conveyor belt 72 so that the number of products fed into the vibratory feeder 77 can be adjusted to accommodate products of different sizes. The frequency converter is used to adjust the vibration frequency of the vibratory feeder 77 to accommodate products of different sizes and weights. The speed controller, frequency converter, motor of the feeding conveyor belt 72, and vibratory feeder 77 are connected to the PLC controller via signals.

[0041] By adopting the above technical solution, the toroidal ferrite products are conveyed backward in a unified direction.

[0042] Example 3

[0043] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This embodiment provides the following technical solution: a rod-threading machine for arranging annular ferrite products, including a workbench 1, an arranging assembly 7 installed above the workbench 1, a conveyor belt 3 provided on the discharge end side of the arranging assembly 7, a reversing block 2 installed above one end of the conveyor belt 3, a hopper 6 provided on one side of the other end of the conveyor belt 3, a feeding assembly 5 provided above the hopper 6, a limit baffle installed on one end of the conveyor belt 3 at the feeding assembly 5, used to limit the annular ferrite products, so that the annular ferrite products are arranged on the conveyor belt 3, and the drive motor of the conveyor belt 3 is connected to the PLC controller signal. The assembly assembly 7 includes a base plate 71, an inclined feeding conveyor belt 72 mounted on the base plate 71, a hopper 73 mounted on the feeding conveyor belt 72, a slide rail 74 mounted on the output end of the feeding conveyor belt 72, and a vibratory feeder 77 located below the slide rail 74. The assembly assembly 7 also includes a speed controller and a frequency converter. The speed controller is used to adjust the conveying speed of the feeding conveyor belt 72, so that the number of products fed into the vibratory feeder 77 can be adjusted to accommodate products of different sizes. The frequency converter is used to adjust the vibration frequency of the vibratory feeder 77 to accommodate products of different sizes and weights. The speed controller, the frequency converter, the motor of the feeding conveyor belt 72, and the vibratory feeder 77 are connected to the PLC controller via signals.

[0044] For details, please refer to Figure 2 The conveying track of the vibratory feeder 77 is covered with soft rubber 75.

[0045] By adopting the above technical solution, the friction between the annular ferrite product and the vibratory plate 77 is reduced, thereby reducing the defects of the annular ferrite product.

[0046] For details, please refer to Figure 2 A full material sensor 76 is installed above the vibratory feeder 77, and the full material sensor 76 is connected to the PLC controller signal.

[0047] By adopting the above technical solution, the amount of product in the vibratory feeder 77 can be detected to prevent excessive product from overflowing.

[0048] Example 4

[0049] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This embodiment provides the following technical solution: a rod-threading machine for arranging annular ferrite products, including a workbench 1, an arranging assembly 7 installed above the workbench 1, a conveyor belt 3 provided on the discharge end side of the arranging assembly 7, a reversing block 2 installed above one end of the conveyor belt 3, a hopper 6 provided on one side of the other end of the conveyor belt 3, a feeding assembly 5 provided above the hopper 6, a limit baffle installed on one end of the conveyor belt 3 at the feeding assembly 5, used to limit the annular ferrite products, so that the annular ferrite products are arranged on the conveyor belt 3, and the drive motor of the conveyor belt 3 is connected to the PLC controller signal.

[0050] For details, please refer to Figure 5 The feeding assembly 5 includes a support base 51. Two parallel synchronous belts 52 are mounted on the top of the support base 51. A motor 53 for driving the synchronous belts 52 is also mounted on the support base 51. The motor 53 is connected to the PLC controller. Several equally spaced connecting blocks 55 are connected to the surface of the synchronous belts 52. A pawl 54 is connected between two corresponding connecting blocks 55.

[0051] By adopting the above technical solution, the synchronous belt 52 is driven to rotate by the motor 53, thereby driving the paddle 54 to move the annular ferrite products arranged on the conveyor belt 3 to the hopper 6.

[0052] Example 5

[0053] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5This embodiment provides the following technical solution: a rod-threading machine for arranging annular ferrite products, including a workbench 1, an arranging assembly 7 installed above the workbench 1, a conveyor belt 3 provided on the discharge end side of the arranging assembly 7, a reversing block 2 installed above one end of the conveyor belt 3, a hopper 6 provided on one side of the other end of the conveyor belt 3, a feeding assembly 5 provided above the hopper 6, a limit baffle installed on one end of the conveyor belt 3 at the feeding assembly 5, used to limit the annular ferrite products, so that the annular ferrite products are arranged on the conveyor belt 3, and the drive motor of the conveyor belt 3 is connected to the PLC controller signal.

[0054] For details, please refer to Figure 4 The hopper 6 includes a horizontal section 61 and an inclined section 62, wherein the horizontal section 61 is located on the side close to the conveyor belt 3.

[0055] By adopting the above technical solution and by setting the inclined part 62, it is convenient for employees to operate.

[0056] For details, please refer to Figure 4 Both sides of the horizontal part 61 and the inclined part 62 are provided with baffles to prevent the annular ferrite product from falling. The height of the baffle of the inclined part 62 is less than the ring width of the annular ferrite product.

[0057] By adopting the above technical solution, the obstruction of the inner ring of the annular ferrite product is avoided.

[0058] Example 6

[0059] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This embodiment provides the following technical solution: a rod-threading machine for arranging annular ferrite products, including a workbench 1, an arranging assembly 7 installed above the workbench 1, a conveyor belt 3 provided on the discharge end side of the arranging assembly 7, a reversing block 2 installed above one end of the conveyor belt 3, a hopper 6 provided on one side of the other end of the conveyor belt 3, a feeding assembly 5 provided above the hopper 6, a limit baffle installed on one end of the conveyor belt 3 at the feeding assembly 5, used to limit the annular ferrite products, so that the annular ferrite products are arranged on the conveyor belt 3, and the drive motor of the conveyor belt 3 is connected to the PLC controller signal.

[0060] Specifically, a magnetic block is provided below the conveying surface of the conveyor belt 3, and a baffle is provided on the conveyor belt 3.

[0061] The above technical solution is used to prevent vertically positioned annular ferrite products from tipping over due to factors such as transmission or vibration.

[0062] Specifically, a material feeding sensor 4 is installed on one side of the material feeding assembly 5 on the conveyor belt 3, and the material feeding sensor 4 is connected to the PLC controller signal.

[0063] By adopting the above technical solution, the material feeding component 5 is triggered to operate. When the material feeding sensor 4 can continuously detect within the set threshold, the material feeding component 5 is activated by the PLC controller.

[0064] Example 7

[0065] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This embodiment provides the following technical solution: a rod-threading machine for arranging annular ferrite products, including a workbench 1, an arranging assembly 7 installed above the workbench 1, a conveyor belt 3 provided on the discharge end side of the arranging assembly 7, a reversing block 2 installed above one end of the conveyor belt 3, a hopper 6 provided on one side of the other end of the conveyor belt 3, a feeding assembly 5 provided above the hopper 6, a limit baffle installed on one end of the conveyor belt 3 at the feeding assembly 5, used to limit the annular ferrite products, so that the annular ferrite products are arranged on the conveyor belt 3, and the drive motor of the conveyor belt 3 is connected to the PLC controller signal.

[0066] Specifically, the feed inlet and discharge outlet of the reversing block 2 are set at 90°, and a reversing channel is provided between the feed inlet and the discharge outlet.

[0067] By adopting the above technical solution, the commutation of the toroidal ferrite product is achieved by utilizing gravity.

[0068] The steps involved in this disclosure are as follows:

[0069] 1. The employee pours the annular ferrite product into the hopper 73. The annular ferrite product is then conveyed to the vibrating plate 77 via the feeding conveyor belt 72. The vibrating plate 77 conveys the annular ferrite product backward in a uniform direction.

[0070] 2. After being reversed by the reversing block 2, the annular ferrite products fall onto the conveyor belt 3, are conveyed backward by the conveyor belt 3, and are arranged in sequence on the conveyor belt 3;

[0071] 3. When the material feeding sensor 4 can continuously detect within the set threshold, the material feeding component 5 is activated through the PLC controller. The material feeding component 5 moves the annular ferrite products arranged on the conveyor belt 3 to the hopper 6.

[0072] 4. As the feeding component 5 is moved, the arranged products are arranged in rows on the inclined part 62 of the hopper 6, and the employees use metal rods to string the arranged annular ferrite products together.

[0073] In summary, compared with the manual operation by employees in the prior art, this disclosure can avoid direct contact between employees and the toroidal ferrite products, thereby preventing sweaty hands from getting on the products, improving the yield rate, reducing labor intensity, and improving work efficiency. Furthermore, the same number of rods are threaded onto each metal rod, facilitating management. The conveying track of the vibratory feeder 77 of this disclosure is covered with soft rubber 75, which can reduce friction between the toroidal ferrite products and the vibratory feeder 77, thereby reducing defects in the toroidal ferrite products. This disclosure uses the feeding assembly 5 to move the toroidal ferrite products arranged on the conveyor belt 3 to the hopper 6. The hopper 6 of this disclosure includes a horizontal section 61 and an inclined section 62. The horizontal section 61 is located on the side closest to the conveyor belt 3, and the inclined section 62 facilitates employee operation. A magnetic block is provided below the conveying surface of the conveyor belt 3, and a baffle is provided on the conveyor belt 3 to prevent the vertically positioned toroidal ferrite products from tipping over due to conveying or vibration. The feed inlet and discharge outlet of the reversing block 2 disclosed herein are set at 90°, and a reversing channel is provided between the feed inlet and discharge outlet to realize the reversing of the annular ferrite product by means of gravity.

[0074] Although embodiments of the present disclosure have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rod-threading machine for arranging annular ferrite products, characterized in that: It includes a workbench, an alignment assembly is installed on the top of the workbench, a conveyor belt is provided on the discharge end side of the alignment assembly, a reversing block is installed on the conveyor belt above one end of the alignment assembly, a hopper is provided on one side of the other end of the conveyor belt, and a feeding assembly is provided above the hopper.

2. The rod-threading machine for arranging annular ferrite products according to claim 1, characterized in that: The assembly includes a base plate, an inclined feeding conveyor belt mounted on the top of the base plate, a hopper mounted on the top of the feeding conveyor belt, a slide rail mounted on the output end of the feeding conveyor belt, a vibrating plate mounted below the slide rail, and the vibrating plate connected to the PLC controller.

3. The rod-threading machine for arranging annular ferrite products according to claim 2, characterized in that: The conveying track of the vibratory feeder is covered with soft rubber.

4. The rod-threading machine for arranging annular ferrite products according to claim 2, characterized in that: A full-load sensor is installed above the vibratory feeder, and the full-load sensor is connected to the PLC controller.

5. The rod-threading machine for arranging annular ferrite products according to claim 1, characterized in that: The feeding assembly includes a support base, two parallel synchronous belts are mounted on the top of the support base, a motor for driving the synchronous belts is also mounted on the support base, and several equally spaced connecting blocks are connected to the surface of the synchronous belts, with a pawl connecting between corresponding two connecting blocks.

6. The rod-threading machine for arranging annular ferrite products according to claim 1, characterized in that: The hopper includes a horizontal section and an inclined section, wherein the horizontal section is located on the side closer to the conveyor belt.

7. The rod-threading machine for arranging annular ferrite products according to claim 6, characterized in that: Both sides of the horizontal portion and the inclined portion are provided with retaining edges, wherein the height of the retaining edge of the inclined portion is less than the ring width of the annular ferrite product.

8. The rod-threading machine for arranging annular ferrite products according to claim 1, characterized in that: A magnetic block is provided below the conveying surface of the conveyor belt, and a baffle is provided on the conveyor belt.

9. The rod-threading machine for arranging annular ferrite products according to claim 1, characterized in that: A material feeding sensor is installed on one side of the material feeding assembly on the conveyor belt, and the material feeding sensor is connected to the PLC controller signal.

10. The rod-threading machine for arranging annular ferrite products according to claim 1, characterized in that: The feed inlet and discharge outlet of the reversing block are set at 90°.

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