A pressing device for producing a wood paint-free board

Abstract

The utility model discloses a kind of wood lacquer-free board production is pressed together with device, including rack, the top of the rack is equipped with mesh conveyor belt, the top of the rack is equipped with electric slide rail, the top of the electric slide rail is equipped with cleaning assembly, the side of the rack is equipped with feeding seat, the inside of the feeding seat is equipped with two-way slide, the outer wall of the two-way slide is equipped with correction frame with sliding, the top of the rack is equipped with turnover assembly, the outer wall of the rack is fixedly connected with machine case, the top of the machine case is equipped with pressing assembly, the inside of the rack is equipped with correction slide, the inside of the correction slide is equipped with correction push rod with sliding, the utility model provides a kind of wood lacquer-free board production is pressed together with device ensure that cleaning effect is uniform, clean and smooth surface lays good foundation for subsequent gluing and pressing, reduce the problem such as pressing bubble, cracking caused by surface defect.

Description

Technical Field

[0001] This utility model relates to the field of wood-based paint-free board production technology, specifically a pressing device for wood-based paint-free board production. Background Technology

[0002] In utility model patent application CN214604895U, published on November 5, 2021, entitled "A Fiber-Reinforced Bamboo and Wood Plywood Pressing Device," this utility model discloses a fiber-reinforced bamboo and wood plywood pressing device, relating to the field of plywood technology. It includes a workbench and a U-shaped mounting base. The top of a rectangular pressing plate has two strip-shaped grooves for sliding threaded rods. T-shaped grooves are provided on both sides of the rectangular pressing plate. T-shaped sliders are fixedly installed on the top of the two opposite inner sidewalls of the U-shaped mounting base. The threaded rod is connected to a nut that mates with the threaded rod, and a cutter is fixedly installed at the bottom of the U-shaped bracket. This fiber-reinforced bamboo plywood pressing device allows for adjustment of the cutter's position according to actual conditions, facilitating the cutting of different types of boards. It also facilitates the disassembly and assembly of the U-shaped bracket, making it easy to replace or repair the cutter. The device can simultaneously press the bamboo plywood and cut off excess waste from both sides of the plywood, reducing the need for separate subsequent cutting steps and improving production efficiency.

[0003] In the prior art, including the aforementioned patents, pressing is a crucial step in the production of wood-based melamine boards, and its quality directly affects the overall performance and appearance of the boards. Traditional pressing devices often suffer from low automation, inaccurate board positioning, incomplete surface cleaning, and poor pressing results. This leads to defects in the produced melamine boards, such as loose bonding, uneven surfaces, and other flaws, failing to meet market demands for high-quality melamine boards. To address these issues, this utility model proposes a pressing device for the production of wood-based melamine boards. Utility Model Content

[0004] The purpose of this invention is to provide a pressing device for the production of paint-free wood panels, so as to solve the problems mentioned in the background art that can effectively improve production efficiency and pressing quality of paint-free wood panels.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pressing device for producing wood-based paint-free boards, comprising a frame, a mesh conveyor belt mounted on the top of the frame, an electric slide rail mounted on the top of the frame, a cleaning component mounted on the top of the electric slide rail, a feeding seat mounted on one side of the frame, a bidirectional slide rail mounted inside the feeding seat, a straightening frame slidably mounted on the outer wall of the bidirectional slide rail, a flipping component mounted on the top of the frame, a housing fixedly connected to the outer wall of the frame, a pressing component mounted on the top of the housing, a straightening slide rail mounted on the inner side of the frame, and a straightening push rod slidably mounted inside the straightening slide rail.

[0006] Furthermore, the internal components of the cleaning assembly include an electric slider, a mounting base, a distance sensor, a lifting rod, a cleaning grinding plate, and an adjusting support frame. The electric slider is mounted on the top of the frame via an electric slide rail. The mounting base is mounted on the top of the electric slider. The distance sensor is mounted on the side of the mounting base. The lifting rod is located on the top of the mounting base. One end of the lifting rod is fixedly connected to the cleaning grinding plate. The adjusting support frame is located on the top of the frame.

[0007] Furthermore, the electric slide rail, the bidirectional slide rail, and the straightening slide rail are all equipped with lead screws and connecting block structures. The adjusting support frame is located at the bottom of the cleaning grinding plate and blocks the upper and lower plates. The bottom of the cleaning grinding plate is equipped with a detachable diamond grinding disc.

[0008] Furthermore, the interior of the flipping assembly includes a flipping motor, a reduction gear, a mating gear, a shaft, and a flipping lifting rod. The flipping motor is mounted on the outer wall of the frame. The output shaft of the flipping motor is fixedly connected to the reduction gear via a coupling. The outer wall of the reduction gear is meshed with the mating gear. The shaft is fixedly connected inside the mating gear. The outer wall of the shaft is mounted with a flipping lifting rod.

[0009] Furthermore, another set of shaft structures is installed on the top of the feeding seat, and the shafts have a reciprocating 180° movement trajectory. An arc-shaped silicone pad is provided at the end of the flipping pick.

[0010] Furthermore, the internal components of the pressing assembly include an electric guide rail, a movable seat, an upper pressing cylinder, an upper pressing platform, a bracket, a lower pressing cylinder, a lower pressing base, an adjusting cylinder, a nozzle, and an external connecting pipe. An electric guide rail is mounted on the top of the housing. A movable seat is slidably mounted on the top of the electric guide rail. An upper pressing cylinder is mounted on the top of the movable seat. The output end of the upper pressing cylinder is fixedly connected to the upper pressing platform. A bracket is mounted on the top of the movable seat. A lower pressing cylinder is mounted in the middle of the bracket. The output end of the lower pressing cylinder is fixedly connected to the lower pressing base. An adjusting cylinder is mounted on one side of the bracket. The output end of the adjusting cylinder is fixedly connected to a nozzle. An external connecting pipe is mounted on the outer wall of the nozzle.

[0011] Furthermore, the upper pressure platform is flush with the flipping plane of the shaft, and the upper pressure platform and the lower pressure base are symmetrical vertically. The bottom of the lower pressure base is provided with an injection hole, and the nozzle is aligned with the injection hole, and the nozzle is symmetrical to each other front and back.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the pressing device for producing paint-free wooden boards is reasonable and has the following advantages: (1) This utility model can efficiently remove burrs, impurities and stains from the surface of the board by using a detachable diamond grinding disc at the bottom of the cleaning plate. The distance sensor and lifting rod can automatically adjust the height and pressure of the cleaning plate according to the thickness of the board, ensuring uniform cleaning effect. The clean and flat surface lays a good foundation for subsequent glue application and pressing, reducing problems such as pressing bubbles and cracking caused by surface defects. At the same time, it improves the appearance and service life of the paint-free board. Secondly, the nozzle in the pressing component is aligned with the filling hole of the pressing base and is symmetrical. The adjusting cylinder can precisely adjust the nozzle position to ensure that the glue can be accurately and evenly applied to the designated area of ​​the board. This precise glue application method avoids glue waste and uneven application, making the bonding between boards stronger and significantly improving the overall structural strength of the paint-free board. (2) The device integrates multiple processes such as feeding, straightening, cleaning, flipping, gluing, and pressing. Each process is automated through drive components such as electric slide rails, electric guide rails, cylinders, and motors, reducing manual intervention. For example, the straightening frame of the feeding seat automatically positions the board under the action of the bidirectional slide rail. The flipping component can automatically flip the board 180°. The pressing component can automatically adjust its position according to the board specifications and complete the pressing operation, which greatly shortens the conversion time between processes, increases the production quantity per unit time, and significantly improves the overall production efficiency. In addition, multiple straightening mechanisms are set up. During the feeding stage, the bidirectional slide rail drives the straightening frame to perform preliminary straightening of the board from both sides. During the conveying process, the straightening push rod in the straightening slide rail further calibrates the position of the board from the end. During pressing, the upper pressing platform is flush with the flipping plane of the shaft, and the upper pressing platform and the lower pressing base are symmetrical, ensuring that the board accurately enters the pressing area. Precise positioning effectively avoids problems such as pressing misalignment and loose bonding caused by board offset, ensuring the pressing quality of the paint-free board and reducing the defect rate. Attached Figure Description

[0013] Figure 1 This is an overall drawing of the present utility model; Figure 2 This is a front view of the present utility model; Figure 3 This is a side view of the present invention; Figure 4 This is a schematic diagram of the structure of the feeding base and frame of this utility model; Figure 5 This is a schematic diagram of the pressing assembly of this utility model.

[0014] In the diagram: 1. Frame; 2. Mesh conveyor belt; 3. Electric slide rail; 4. Cleaning assembly; 401. Electric slider; 402. Mounting base; 403. Distance sensor; 404. Lifting rod; 405. Cleaning grinding plate; 406. Adjustment support frame; 5. Loading seat; 6. Two-way slide rail; 7. Straightening frame; 8. Tilting assembly; 801. Tilting motor; 802. Reduction gear; 803. Connecting gear; 8 04. Shaft; 805. Flipping rod; 9. Chassis; 10. Pressing assembly; 1001. Electric guide rail; 1002. Movable seat; 1003. Upper pressure cylinder; 1004. Upper pressure platform; 1005. Bracket; 1006. Lower pressure cylinder; 1007. Lower pressure base; 1008. Adjusting cylinder; 1009. Nozzle; 1010. External pipe; 11. Correction slide; 12. Correction push rod. Detailed Implementation

[0015] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-5 The present invention provides a technical solution as follows: Example 1: A pressing device for producing wood-based paint-free boards includes a frame 1. The frame 1 serves as the basic support component of the entire device, providing an installation platform and stable support structure for other components, ensuring the overall stability of the device during operation. A mesh conveyor belt 2 is installed on the top of the frame 1. The mesh conveyor belt 2 is mainly used for material conveying during the production process of wood-based paint-free boards. Its mesh structure design helps to reduce friction and damage to the surface of the board during conveying, and also facilitates relevant processing operations on the board in subsequent processes. An electric slide rail 3 is installed on the top of the frame 1. The electric slide rail 3 provides track support for the movement of a cleaning component 4. The cleaning component 4 is installed on the top of the electric slide rail 3. The cleaning component 4 is used to clean the surface of the wood-based paint-free board, removing impurities, burrs, etc., to ensure the quality of subsequent pressing processes. Furthermore, the internal components of the cleaning assembly 4 include an electric slider 401, a mounting base 402, a distance sensor 403, a lifting rod 404, a cleaning grinding plate 405, and an adjusting support frame 406. The electric slider 401 is mounted on the top of the frame 1 via an electric slide rail 3. The electric slider 401 can slide on the electric slide rail 3, thereby driving the entire cleaning assembly 4 to move along the slide rail direction, achieving cleaning of the plate material at different locations. A mounting base 402 is mounted on the top of the electric slider 401, providing a mounting foundation for other components of the cleaning assembly 4. A distance sensor 403 is mounted on the side of the mounting base 402, used to detect the distance between the cleaning grinding plate 405 and the plate to be cleaned. The distance between the plates is adjusted to allow for adjustment of the cleaning grinding plate 405's position based on parameters such as plate thickness, ensuring effective cleaning. A lifting rod 404 is mounted on the top of the mounting base 402. This lifting rod 404 can extend and retract, thereby moving the cleaning grinding plate 405 up and down to adjust the distance between the cleaning grinding plate 405 and the plates. One end of the lifting rod 404 is fixedly connected to the cleaning grinding plate 405. A detachable diamond abrasive disc is located at the bottom of the cleaning grinding plate 405. This diamond abrasive disc has high hardness and wear resistance, effectively removing impurities and burrs from the plate surface. When the diamond abrasive disc wears down to a certain extent, it can be easily replaced, ensuring continuous cleaning effectiveness. Furthermore, an adjustable support frame 406 is provided on the top of the frame 1. The adjustable support frame 406 is located at the bottom of the cleaning grinding plate 405 and blocks the upper and lower plates to prevent them from interfering with each other during the cleaning process. At the same time, it can also provide a certain support for the plates to ensure the stability of the cleaning process. A loading seat 5 is installed on one side of the frame 1. The loading seat 5 is used for loading wooden paint-free boards and provides an initial placement position for the boards to enter the subsequent processes. A bidirectional slide 6 is installed inside the loading seat 5. The bidirectional slide 6 provides a track for the movement of the straightening frame 7. The straightening frame 7 is slidably installed on the outer wall of the bidirectional slide 6. The straightening frame 7 can slide on the bidirectional slide 6 to correct the position of the boards entering the loading seat 5 and ensure that the boards can accurately enter the subsequent conveying and processing processes. Furthermore, a flipping assembly 8 is installed on the top of the frame 1. The flipping assembly 8 is used to flip the wooden melamine board to process the other side of the board. The flipping assembly 8 internally includes a flipping motor 801, a reduction gear 802, a connecting gear 803, a shaft 804, and a flipping lifting rod 805. The flipping motor 801 is installed on the outer wall of the frame 1. The flipping motor 801 provides power for the operation of the flipping assembly 8. The output shaft of the flipping motor 801 is fixedly connected to the reduction gear 802 via a coupling. The reduction gear 802 reduces speed and transmits power, converting the high-speed rotational motion of the flipping motor 801 into a suitable... The low-speed movement of the flipping operation involves a gear 803 meshing with the outer wall of a reduction gear 802. Power is transmitted to the gear 803 through this meshing transmission. A shaft 804 is fixedly connected inside the gear 803. The rotation of the gear 803 drives the shaft 804 to rotate as well. A flipping lever 805 is mounted on the outer wall of the shaft 804. The rotation of the shaft 804 drives the flipping lever 805 to perform a flipping motion, thus flipping the material. Another set of shafts 804 is mounted on the top of the loading seat 5, and these shafts 804 have a 180° reciprocating motion trajectory, which can meet the flipping requirements of the material at different positions. An arc-shaped silicone pad is provided at the end of the flipping lever 805. This soft silicone pad prevents scratches and damage to the surface of the material during flipping, while also increasing friction between the pad and the material, ensuring the reliability of the flipping process. The outer wall of the frame 1 is fixedly connected to the housing 9. Various control components, drive components, etc. can be installed inside the housing 9 to provide control and power support for the operation of the device. The top of the housing 9 is equipped with a pressing assembly 10, which is the core component for realizing the pressing process of wood-based paint-free boards. Furthermore, the internal components of the pressing assembly 10 include an electric guide rail 1001, a movable seat 1002, an upper pressure cylinder 1003, an upper pressure platform 1004, a bracket 1005, a lower pressure cylinder 1006, a lower pressure base 1007, an adjusting cylinder 1008, a nozzle 1009, and an external pipe 1010. The top of the housing 9 is equipped with the electric guide rail 1001, which provides a track for the movement of the movable seat 1002, enabling the movable seat 1002 to drive the relevant components of the pressing assembly 10 to adjust their positions to adapt to the pressing requirements of different specifications of sheet metal.

[0017] The above structure has a movable seat 1002 slidably mounted on the top of the electric guide rail 1001. The movable seat 1002 provides an installation platform for components such as the upper pressure cylinder 1003 and the bracket 1005. The upper pressure cylinder 1003 is mounted on the top of the movable seat 1002. As a power element, the upper pressure cylinder 1003 can drive the upper pressure platform 1004 to move up and down. The output end of the upper pressure cylinder 1003 is fixedly connected to the upper pressure platform 1004. The upper pressure platform 1004 moves downward under the drive of the upper pressure cylinder 1003 and cooperates with the lower pressure base 1007 to realize the pressing operation of the plate. The top of the movable seat 1002 is equipped with a bracket 1005, which provides installation support for components such as the lower pressure cylinder 1006 and the adjusting cylinder 1008.

[0018] A pressing cylinder 1006 is installed in the middle of the bracket 1005. The pressing cylinder 1006 provides power for the movement of the pressing base 1007. The output end of the pressing cylinder 1006 is fixedly connected to the pressing base 1007. The pressing base 1007 moves upward under the drive of the pressing cylinder 1006 and cooperates with the pressing platform 1004 to complete the pressing action. The upper pressing platform 1004 and the rotating plane of the shaft 804 are flush, and the upper pressing platform 1004 and the lower pressing base 1007 are symmetrical. This design ensures that the plate can accurately enter the pressing position after being flipped, thus ensuring the accuracy of the pressing operation. An adjusting cylinder 1008 is installed on one side of the bracket 1005. The adjusting cylinder 1008 can drive the nozzle 1009 to adjust its position so as to better perform operations such as applying glue to the board. The nozzle 1009 is fixedly connected to the output end of the adjusting cylinder 1008. An external pipe 1010 is installed on the outer wall of the nozzle 1009. The external pipe 1010 is used to connect the supply pipe of glue and other materials. The glue and other materials are evenly sprayed onto the surface of the board through the nozzle 1009 to prepare for the subsequent pressing process. The bottom of the pressure base 1007 has an inlet hole, and the nozzle 1009 is aligned with the inlet hole and symmetrically positioned. This design ensures that materials such as adhesive can accurately enter the designated position, improving the uniformity and accuracy of adhesive application. A straightening slide 11 is installed on the inner side of the frame 1, providing a track for the movement of the straightening push rod 12. The straightening push rod 12 is slidably installed inside the straightening slide 11, allowing it to slide on the straightening slide 11 for further correction of the board's position during board conveying, ensuring the board accurately enters each processing step. The electric slide rail 3, the bidirectional slide rail 6, and the straightening slide rail 11 all have screw and connecting block structures inside. The rotation of the screw drives the connecting block to move, thereby enabling the electric slider 401, the straightening frame 7, and the straightening push rod 12 to slide on their respective slides. This structure provides precise, stable, and reliable transmission, ensuring the motion accuracy of each component. Working principle: When in use, first, the wood-based paint-free board to be processed is placed on the loading seat 5. The straightening frame 7 on the loading seat 5 is corrected in position by the bidirectional slide rail 6 to ensure that the board is in an accurate position. Flipping stage: According to processing requirements, the flipping component 8 on the top of the loading seat 5 works. The flipping motor 801 drives the shaft 804 and the flipping pick 805 to move through the reduction gear 802 and the docking gear 803, flipping the plate to the appropriate face up. Secondly, the conveying stage: the corrected board is first flipped by the flipping lever 805, and then moved by the movable plate inside the loading seat 5 so that it is conveyed to the fixed position on the mesh conveyor belt 2 and then conveyed to the cleaning component 4. During the conveying process, the correcting push rod 12 on the inner side of the frame 1 slides on the correcting slide 11 to further correct the position of the board.

[0019] Cleaning stage: The electric slider 401 of the cleaning component 4 moves on the electric slide rail 3, moving the cleaning grinding plate 405 above the plate. The distance sensor 403 detects the thickness of the plate. The lifting rod 404 adjusts the height of the cleaning grinding plate 405 so that it contacts the surface of the plate. The diamond abrasive pad at the bottom of the cleaning grinding plate 405 cleans the surface of the plate. The support frame 406 is adjusted to support and block the plate. Glue application stage: The other side of the board is conveyed to the pressing assembly 10. The glue supply pipe connected to the external pipe 1010 sprays glue onto the surface of the board through the nozzle 1009. The position of the nozzle 1009 is adjusted by the adjusting cylinder 1008 to ensure that the glue application is uniform and accurate. Finally, in the pressing stage: the adhesive side of the board with glue applied is placed on the cleaned board using the flipping component 8 for bonding. The initial bonding is achieved using the inertia of the flipping. Then, the lower flipping component 8 returns the board to the position of the upper pressing platform 1004. The movable seat 1002 moves on the electric guide rail 1001 to adjust the upper pressing platform 1004 and the lower pressing base 1007 to the appropriate positions. The upper pressing cylinder 1003 drives the upper pressing platform 1004 to move downward, and the lower pressing cylinder 1006 drives the lower pressing base 1007 to move upward. The two work together to press the board. After pressing, the board is transported to the next process by the mesh conveyor belt 2.

[0020] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A pressing device for producing paint-free wood panels, comprising a frame (1), characterized in that: A mesh conveyor belt (2) is installed on the top of the frame (1), an electric slide rail (3) is installed on the top of the frame (1), a cleaning component (4) is installed on the top of the electric slide rail (3), a loading seat (5) is installed on one side of the frame (1), a bidirectional slide rail (6) is installed inside the loading seat (5), a straightening frame (7) is slidably installed on the outer wall of the bidirectional slide rail (6), a flipping component (8) is installed on the top of the frame (1), a housing (9) is fixedly connected to the outer wall of the frame (1), a pressing component (10) is installed on the top of the housing (9), a straightening slide rail (11) is installed on the inner side of the frame (1), and a straightening push rod (12) is slidably installed inside the straightening slide rail (11).

2. The pressing device for producing paint-free wood-based panels according to claim 1, characterized in that: The cleaning assembly (4) includes an electric slider (401), a mounting base (402), a distance sensor (403), a lifting rod (404), a cleaning grinding plate (405), and an adjusting support frame (406). The electric slider (401) is mounted on the top of the frame (1) via an electric slide rail (3). The mounting base (402) is mounted on the top of the electric slider (401). The distance sensor (403) is mounted on the side of the mounting base (402). The lifting rod (404) is provided on the top of the mounting base (402). The cleaning grinding plate (405) is fixedly connected to one end of the lifting rod (404). The adjusting support frame (406) is provided on the top of the frame (1).

3. The pressing device for producing paint-free wood-based panels according to claim 2, characterized in that: The electric slide rail (3), the bidirectional slide rail (6) and the correction slide rail (11) are all equipped with screw and docking block structures. The adjustment support frame (406) is located at the bottom of the cleaning grinding plate (405) and the adjustment support frame (406) blocks the upper and lower plates. The bottom of the cleaning grinding plate (405) is equipped with a detachable diamond grinding disc.

4. The pressing device for producing paint-free wood-based panels according to claim 1, characterized in that: The flipping assembly (8) includes a flipping motor (801), a reduction gear (802), a mating gear (803), a shaft (804), and a flipping lifting rod (805). The flipping motor (801) is installed on the outer wall of the frame (1). The output shaft of the flipping motor (801) is fixedly connected to the reduction gear (802) through a coupling. The outer wall of the reduction gear (802) is meshed with the mating gear (803). The shaft (804) is fixedly connected inside the mating gear (803). The flipping lifting rod (805) is installed on the outer wall of the shaft (804).

5. The pressing device for producing paint-free wood-based panels according to claim 4, characterized in that: The top of the feeding seat (5) is equipped with another set of shafts (804) structure, and the shafts (804) have a reciprocating 180° movement trajectory. The end of the flipping pick (805) is provided with an arc-shaped silicone pad.

6. The pressing device for producing paint-free wood-based panels according to claim 1, characterized in that: The pressing assembly (10) includes an electric guide rail (1001), a movable seat (1002), an upper pressure cylinder (1003), an upper pressure platform (1004), a bracket (1005), a lower pressure cylinder (1006), a lower pressure base (1007), an adjusting cylinder (1008), a nozzle (1009), and an outer pipe (1010). The top of the housing (9) is equipped with an electric guide rail (1001), and the top of the electric guide rail (1001) is slidably equipped with a movable seat (1002). The top of the movable seat (1002) is equipped with an upper pressure cylinder (1003). The output end of the upper pressure cylinder (1003) is fixedly connected to the upper pressure platform (1004). A bracket (1005) is installed on the top of the movable seat (1002). A lower pressure cylinder (1006) is installed in the middle of the bracket (1005). The output end of the lower pressure cylinder (1006) is fixedly connected to the lower pressure base (1007). An adjusting cylinder (1008) is installed on one side of the bracket (1005). A nozzle (1009) is fixedly connected to the output end of the adjusting cylinder (1008). An outer pipe (1010) is installed on the outer wall of the nozzle (1009).

7. The pressing device for producing paint-free wood-based panels according to claim 6, characterized in that: The upper pressure platform (1004) is flush with the flipping plane of the shaft (804), and the upper pressure platform (1004) and the lower pressure base (1007) are symmetrical. The bottom of the lower pressure base (1007) is provided with an injection hole, and the nozzle (1009) is aligned with the injection hole, and the nozzle (1009) is symmetrical to each other front and back.

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