A hot press molding equipment for badminton racket

Abstract

The present application relates to the technical field of plastic forming, in particular to a hot-press forming equipment for badminton racket. When operating the equipment, the prefabricated badminton racket is placed in the forming groove of the lower mold plate, and then the mold is pushed into the baking cavity. At this time, the upper mold plate is blocked by the first guide surface of the baking cavity and automatically flips down to realize mold closing. Then, the high-temperature environment in the baking oven and the gas source supply gas to the prefabricated badminton racket through the gas guide piece and the gas connecting pipe, so that the prefabricated badminton racket uniformly expands and fits the mold cavity, forming the hot-press forming process. When the mold is pulled out of the baking cavity, the passive pin is blocked by the moving piece and cannot move synchronously, driving the push-out sleeve of the jacking device and the rotating groove column to link up. At the same time that the first elastic piece drives the upper mold plate to automatically open the mold, the formed badminton racket is pushed out, facilitating the removal of the mold after it is moved out. The above process does not require manual movement of the upper mold plate, does not require additional driving components, and only through the push-pull action of the mold, the mold closing, mold opening and ejection are completed, which can improve the manual operation efficiency and reduce the operation strength.

Description

Technical Field

[0001] This invention relates to the field of plastic molding technology, and in particular to a hot pressing molding device for badminton rackets. Background Technology

[0002] Badminton rackets made of carbon fiber are often manufactured using a thermoforming process. The corresponding thermoforming equipment is generally equipped with a baking structure and a forming mold. The forming mold mainly consists of an upper mold and a lower mold, which can cooperate to form a cavity for making the badminton racket. During the manufacturing process, the pre-made badminton racket formed by rolling carbon fiber fabric is placed in the cavity, and then the mold is sent into the high-temperature cavity of the baking structure. The high-temperature environment is used to complete the thermoforming process of the badminton racket. After the forming process is completed, the mold is removed from the high-temperature cavity, the mold is opened, and the formed badminton racket is taken out. The entire thermoforming process relies on the coordination of the mold's moving action and the mold opening and closing action.

[0003] In existing technologies, the mold opening and closing actions of badminton racket hot pressing molding equipment mostly rely on manual operation. During the process of the operator moving the mold into and out of the high-temperature cavity of the baking structure, the upper and lower templates of the equipment need to be moved, flipped or subjected to force by the operator to achieve the fitting and separation of the upper and lower templates. The operator needs to participate in the entire mold opening and closing operation, which makes the manual operation intensity of badminton racket hot pressing molding operation always at a high level. Summary of the Invention

[0004] To address the shortcomings mentioned above in the background technology, the present invention provides a hot pressing molding device for badminton rackets.

[0005] The present invention adopts the following technical solution:

[0006] A hot pressing molding apparatus for badminton rackets, the apparatus comprising:

[0007] A baking oven, wherein the baking oven is provided with a baking cavity, and a first guide surface is provided at the upper opening position of the baking cavity, the first guide surface being inclined upward from the inside of the baking cavity outward;

[0008] The mold includes an upper template, a lower template, a connecting rod, and a first elastic element. The upper template and the lower template are hinged together. Both the upper template and the lower template are provided with forming grooves. After the upper template and the lower template are closed, the forming grooves of the upper template and the lower template are correspondingly combined to form the cavity of a badminton racket. The side of the lower template is connected to a slidable sliding element. The elastic force of the first elastic element generates a force that causes the sliding element to continuously move towards the position where the upper template and the lower template are pivotally connected. The two ends of the connecting rod are pivotally connected to the upper template and the sliding element, respectively.

[0009] The mold is adapted to be embedded in the baking cavity, and the lower template is restricted to slide on the lower surface of the baking cavity;

[0010] When the mold moves out of the baking cavity, one end of the lower mold plate is located inside the baking cavity. The first elastic element drives the sliding element to move towards the position where the upper mold plate and the lower mold plate are pivotally connected, and drives the connecting rod to lift the upper mold plate to realize mold opening.

[0011] When the mold moves into the baking cavity, the upper template is blocked by the first guide surface and moves into the baking cavity and downwards until it fits with the lower template, thus achieving mold closing.

[0012] In one possible implementation, a support portion is provided at the end of the lower template facing away from the baking cavity, and the upper template and the lower template are pivotally connected at the end of the support portion near the outside of the baking cavity. When the upper template moves out of the baking cavity and is lifted upward, the support portion is located inside the baking cavity.

[0013] In one possible implementation, a stop bar is fixed to the bottom surface of the bearing portion, a strip groove is provided on the bottom surface of the baking cavity, the strip groove is parallel to the inner and outer directions of the baking cavity, and the stop bar extends into the strip groove;

[0014] When the upper template is moved out of the baking cavity and lifted upward, the stop bar moves to abut against the side wall of the strip groove near the outside of the baking cavity.

[0015] In one possible implementation, slide rails are fixed on both sides of the bottom surface of the lower template, the slide rails extend to the bearing portion, and both slide rails are adapted to connect to sliders, the sliders being fixed to the bottom surface of the baking cavity.

[0016] In one possible implementation, the device further includes an air guide and an air inlet pipe. The air guide has two ports, one of which is connected to the port of the prefabricated badminton racket shaft away from the frame. The air inlet pipe is disposed within the lower template, with one end extending out of the lower template and connected to an air source. The other end of the air inlet pipe is connected to a bend pipe, with the port of the bend pipe away from the air inlet pipe serving as an air inlet facing upwards. After the prefabricated badminton racket is placed in the forming groove, the other port of the air guide, away from the shaft, is connected to the corresponding air inlet.

[0017] In one possible implementation, a vent pipe is fixed on the back of the baking oven at a position corresponding to the baking cavity. One end of the vent pipe is connected to a gas source, and the other end of the vent pipe extends into the lower template. The end of the receiving pipe away from the bend is inserted into the vent pipe, and a sealing ring is fitted between the outer wall of the receiving pipe and the inner wall of the vent pipe.

[0018] In one possible implementation, the device further includes a lifting device, which comprises:

[0019] A fixed cylinder is fixed inside the lower template. A first annular groove and a second annular groove are sequentially arranged along its axial direction inside the fixed cylinder. A flat groove is provided between the first annular groove and the second annular groove. The flat groove is parallel to the axial direction of the fixed cylinder. The two ends of the flat groove are respectively connected to the first annular groove and the second annular groove. An embedding groove is provided above the second annular groove on the fixed cylinder. A first strip-shaped hole penetrating inside and outside the fixed cylinder is provided at the bottom of the fixed cylinder. The first strip-shaped hole is parallel to the axial direction of the fixed cylinder.

[0020] A spiral groove column, wherein the annular surface of the spiral groove column is provided with a recessed spiral groove extending along a spiral line, and a limiting ring is provided at one end of the spiral groove column, and protruding blocks are provided on both radial sides of the limiting ring.

[0021] A push sleeve, with a passive pin fixed on the outside of the push sleeve and a limiting pin fixed inside the push sleeve, the limiting pin protruding relative to the inner wall of the push sleeve;

[0022] The ejector pin holder is blocked in the lower template by the fixing cylinder and is located in the embedding groove. The lower template is provided with an ejector hole in the forming groove. The ejector pin holder is provided with an ejector pin, and the ejector pin is adapted to pass through the ejector hole.

[0023] The bottom surface of the baking cavity is provided with a sliding groove, which is parallel to the inner and outer directions of the baking cavity. The limiting ring is adapted to move inside the fixed cylinder. The stop block is adapted to pass through the flat groove to the first ring groove and the second ring groove. The push sleeve is adapted to be fitted outside the end of the spiral groove column where the spiral groove is provided. The limiting pin is fitted into the spiral groove with clearance. The passive pin passes through the first strip hole and the lower template and extends into the sliding groove.

[0024] As the lower template moves out of the baking cavity, causing the upper template to open upwards, the movement of the lower template moves the fixed cylinder and the passive pin. When the passive pin is blocked and cannot move out of the baking cavity synchronously with the lower template, the lower template continues to move, causing the push sleeve to move relative to the fixed cylinder. This causes the passive pin to push the stop block of the swivel column to move from the first annular groove to the second annular groove on the flat groove. After the limiting ring abuts against the side wall of the second annular groove, the push sleeve continues to move, causing the limiting pin to push the spiral groove and rotate the swivel column. This causes the stop block to flip and push the ejector pin holder out of the embedded groove, thereby pushing the ejector pin to push out the badminton racket formed in the molding groove.

[0025] As the lower template moves into the baking cavity, causing the upper template to close downwards, the movement of the lower template into the baking cavity also causes the fixed cylinder and the passive pin to move. When the passive pin is blocked by the side wall of the slide groove near one end of the baking cavity, the lower template continues to move, causing the push sleeve to move relative to the fixed cylinder. This causes the passive pin to push the stop block of the swivel column to move from the second annular groove to the first annular groove on the flat groove. This causes the ejector pin frame to lose the support of the limiting ring and fall back, causing the ejector pin to fall back as well. This allows the top of the ejector pin and the bottom surface of the forming groove to together form a forming curved surface that adapts to the shape of a badminton racket.

[0026] In one possible implementation, the lifting device further includes a movable member, the upper end of which is provided with an elastically telescopic push block. The push block is provided with an inclined second guide surface on the side facing the outside of the baking cavity. The movable member is adapted to move within the slide groove, and a second elastic member is connected between the movable member and the inner wall of the slide groove near the outside of the baking cavity. The elastic action of the second elastic member forms a force that continuously pushes the movable member into the baking cavity.

[0027] The guide pin is fixed to the side wall of the chute near the outside of the baking cavity;

[0028] As the lower template moves out of the baking cavity, causing the fixed cylinder and the passive pin to move, when the passive pin is blocked by the push block, the lower template continues to move, causing the top push sleeve to move relative to the fixed cylinder. This causes the passive pin to push the stop block of the swivel column to move from the first annular groove to the second annular groove on the flat groove. Then, the lower template continues to move, causing the moving part to continue moving against the elastic force of the second elastic part. When the second guide surface of the push block is blocked by the guide pin and descends, the passive pin continues to move, passing over the push block and moving out of the slide groove.

[0029] In one possible implementation, the movable member is provided with a telescopic groove, and the movable member is provided with a relief groove on the side opposite to the telescopic groove. A relief hole is provided between the telescopic groove and the relief groove. The push block is provided with a limiting shaft. The limiting shaft passes through the relief hole and is fixedly installed in the relief groove. A third elastic member is provided between the push block and the telescopic groove near the bottom surface of the relief groove. The elastic force of the third elastic member forms a force that continuously pushes the push block out of the telescopic groove.

[0030] In one possible implementation, the device further includes an air guide and an air inlet pipe. The air guide has two ports, one of which is connected to the port of the prefabricated badminton racket shaft away from the frame. The swivel groove column has an axially penetrating through hole, and the air inlet pipe passes through the axial through hole of the swivel groove column with a clearance fit. One end of the air inlet pipe extends out of the lower template and is connected to an air source, while the other end of the air inlet pipe is connected to a bend pipe. The port of the bend pipe away from the air inlet pipe is an air inlet hole, which faces upward. After the prefabricated badminton racket is placed in the forming groove, the other port of the air guide away from the shaft is connected to the corresponding air inlet hole.

[0031] As can be seen from the above description of the structure of the present invention, compared with the prior art, the present invention has the following advantages: When the mold is pulled out of the baking cavity, the first elastic element drives the sliding element to move towards the hinge position of the template, and the upper template is lifted by the linkage to realize the mold opening. When the mold is pushed into the baking cavity, the first guide surface on the upper edge of the opening of the baking cavity naturally blocks the upper template, causing the upper template to flip downward into the cavity and fit with the lower template to complete the mold closing. The above mold opening and closing actions are all automatically triggered by the basic action of pushing and pulling the mold, without the need for any additional operations such as moving, flipping, or manually applying force to the template, and without the need for manual assistance in the mold opening and closing operations during the pushing and pulling process, completely eliminating the need for manual participation in various operations of the mold opening and closing process, and greatly reducing the manual operation intensity of badminton racket hot pressing molding. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0033] Figure 2 This is a schematic diagram of the three-dimensional structure of the baking oven.

[0034] Figure 3 This is a schematic diagram of the three-dimensional structure of the mold after it has been opened.

[0035] Figure 4 for Figure 3 An enlarged schematic diagram of point A in the middle.

[0036] Figure 5 This is a three-dimensional structural diagram of the air guide component connected to the end of the shaft of a badminton racket.

[0037] Figure 6 This is a three-dimensional structural diagram of the mold from a downward view after the mold is closed.

[0038] Figure 7 for Figure 6 A magnified diagram of point B in the middle.

[0039] Figure 8 For the template below Figure 7 A diagram showing the location after the first cover is hidden.

[0040] Figure 9 This is a three-dimensional structural diagram of the partition of an oven, viewed from above.

[0041] Figure 10 for Figure 9 A magnified diagram of point C.

[0042] Figure 11 This is a cross-sectional view of the mold after it has been pushed into the baking cavity.

[0043] Figure 12 for Figure 11 A magnified diagram of point D in the middle.

[0044] Figure 13 for Figure 11 A magnified diagram at point E in the middle.

[0045] Figure 14 This is a cross-sectional view of the mold after it has been pulled out of the baking cavity.

[0046] Figure 15 for Figure 14 A magnified diagram at point F in the middle.

[0047] Figure 16 for Figure 14 A magnified diagram of point G in the middle.

[0048] Figure 17 This is a cross-sectional view of the sliding component connecting to the mold.

[0049] Figure 18 This is a schematic diagram of the ejector pin holder embedded in the groove of the fixed cylinder.

[0050] Figure 19 This is a three-dimensional cross-sectional view of the upper half of the fixed cylinder and its internal components.

[0051] Figure 20 A schematic diagram showing the fixed cylinder with a swivel column and a push sleeve installed inside, and the upper part of the fixed cylinder hidden.

[0052] Figure 21 This is a schematic diagram showing the upper part of the fixed cylinder after it has been hidden.

[0053] Figure 22 This is a schematic diagram of the three-dimensional structure of the grooved column.

[0054] Figure 23 This is a three-dimensional structural diagram of the pusher sleeve.

[0055] Figure 24 A three-dimensional structural diagram of the push block connecting the moving part. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will now be described in further detail with reference to the accompanying drawings.

[0057] Hereinafter, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this embodiment, unless otherwise stated, "multiple" or "multiple sets" means two or more.

[0058] Furthermore, in this embodiment, directional terms such as "upper" and "lower" are defined relative to the orientation of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, used to describe and clarify relative positions, and can change accordingly depending on the orientation of the components in the accompanying drawings.

[0059] This invention provides a hot pressing molding device for badminton rackets, as shown in the attached figure. Figure 1 and 2 As shown, the equipment includes a baking oven 1, a mold 2, and a lifting device. The baking oven 1 contains a baking cavity 101, formed by vertically distributed partitions 12 within the oven 1. Specifically, the gaps between adjacent partitions 12 form the baking cavity 101. A heating source, which can be a heating pipe, is installed within the baking oven 1 and can be distributed within the partitions 12. The heating source heats the interior of the baking cavity 101 to create a high-temperature environment that meets the molding requirements. (See attached diagram.) Figure 3 The mold 2 includes an upper template 21 and a lower template 22. Both the upper template 21 and the lower template 22 are provided with forming grooves 201. After the upper template 21 and the lower template 22 are closed, the forming grooves 201 of the upper template 21 and the forming grooves 201 of the lower template 22 are correspondingly combined and spliced ​​to form the cavity for making the badminton racket 5.

[0060] After mold 2 is closed, it fits perfectly into the baking cavity 101 and can be embedded inside the baking cavity 101. The lower mold plate 22 is restricted to slide on the partition plate 12 on the lower surface of the baking cavity 101. After placing the pre-made badminton racket 5 into the forming groove 201 of the lower mold plate 22, the upper mold plate 21 is closed onto the lower mold plate 22 to complete the mold closing operation, so that the pre-made badminton racket 5 is in the cavity formed by the forming groove 201 of the upper mold plate 21 and the forming groove 201 of the lower mold plate 22. Then, mold 2 is pushed into the baking cavity 101, and the pre-made badminton racket is baked and formed by the high temperature environment inside the baking cavity 101, which effectively ensures the stability of the forming process and the forming quality of the badminton racket 5. Preferably, the baking oven 1 of the present invention can be configured with multiple baking cavities 101 and correspondingly adapted with multiple sets of molds 2 to carry out hot pressing forming and baking operations of multiple badminton rackets 5 at the same time, effectively improving the processing efficiency of the equipment.

[0061] As attached Figure 6 and 9 As shown, slide rails 231 are fixed on both sides of the bottom surface of the lower template 22. Both slide rails 231 are adapted to connect sliders 232. The sliders 232 are fixed to the partition plate 12 at the bottom of the baking cavity 101. This structure limits the movement direction of the lower template 22, so that the lower template 22 can only slide relative to the baking cavity 101. This ensures that the mold 2 moves smoothly and stably when entering and exiting the baking cavity 101. At the same time, it limits the movement trajectory of the lower template 22, preventing the lower template 22 from deviating or misaligning during the sliding process. This makes it easier for the operator to smoothly pull the mold 2 out of the baking cavity 101 for picking up parts or putting in materials, and also to smoothly push the mold 2 into the baking cavity 101 for mold closing and baking operations.

[0062] As attached Figures 11 to 16 As shown, the device of the present invention further includes an air guide 41 and an air inlet pipe 42. The air guide 41 has two ports, and the axis lines of the two ports are perpendicular to each other. (Refer to the attached diagram.) Figure 5One port of the air guide 41 is connected to the port of the shaft 51 of the prefabricated badminton racket 5 furthest from the frame. Specifically, the port of the air guide 41 can be fitted over the shaft 51 to achieve air passage connection. The air inlet pipe 42 is set inside the lower template 22, with one end of the air inlet pipe 42 extending out of the lower template 22 and connected to the air source. The other end of the air inlet pipe 42 is connected to the bend pipe 43, with the port of the bend pipe 43 furthest from the air inlet pipe 42 serving as the air inlet hole, which is positioned upwards. After the prefabricated badminton racket is placed in the forming groove 201, the air guide 41 is placed on the lower template 22 along with the badminton racket 5, and the other end of the air guide 41 furthest from the shaft 51 is precisely aligned and connected to the air inlet hole. This structure allows the prefabricated badminton racket 5 and the air inlet pipe 42 to form a complete air passage. After the prefabricated badminton racket 5 is placed in the cavity formed by the upper template 21 and the lower template 22 after they are molded together, gas is introduced into the air inlet pipe 42 through the air source. The gas is then introduced into the interior of the prefabricated badminton racket 5 through the air inlet pipe 42, the bend pipe 43 and the air guide 41 in sequence. This causes the prefabricated badminton racket 5 to expand evenly under the action of air pressure and fit tightly against the inner wall of the cavity. With the support of air pressure and the high temperature environment in the baking oven 1, the prefabricated badminton racket 5 made of carbon fiber cloth is hot-pressed, which effectively ensures the consistency between the shape of the badminton racket 5 and the contour of the cavity, and improves the interlayer bonding of the carbon fiber cloth and the structural strength of the finished product.

[0063] Furthermore, an air guide pipe 44 is fixed on the back of the baking oven 1 at the position corresponding to the baking cavity 101. One end of the air guide pipe 44 is connected to an air source, which can be provided by an air compressor. The other end of the air guide pipe 44 extends into the baking cavity 101 and passes through the lower mold plate 22. The end of the air receiving pipe 42 away from the bend 43 passes into the air guide pipe 44, and a sealing ring is embedded in the outer wall of this end of the air receiving pipe 42 to seal the gap between the inner walls of the air receiving pipe 42 and the air guide pipe 44. This plug-in structure of the air guide pipe 44 and the air receiving pipe 42 ensures that the air path from the air source to the air receiving component is continuously connected. This connection structure will not interfere with the sliding action of the mold 2 moving out of or into the baking cavity 101, ensuring that the sealing and connectivity of the air path are not affected during the reciprocating movement of the mold 2.

[0064] As attached Figure 11 and 14 As shown, a first guide surface 11 is provided at the upper opening of the baking cavity 101. The first guide surface 11 extends outward from the inside of the baking cavity 101 and slopes upward. The upper template 21 and the lower template 22 are hinged together. The side of the lower template 22 is connected to a slidable slider 24. The connection method can be as shown in the attached figure. Figure 3 , 4As shown in Figure 17, T-shaped track grooves 2201 are opened on both sides of the lower template 22. The sliding member 24 adopts a bearing structure. The center of the sliding member 24 is fixed with a rotating shaft. The sliding member 24 is adapted to be embedded in the track groove 2201, and the rotating shaft extends out of the track groove 2201.

[0065] Please refer to the appendix. Figure 3 , 4 The mold 2 also includes a connecting rod 25 and a first elastic element 26. The two ends of the connecting rod 25 are pivotally connected to the upper template 21 and the pivot of the sliding element 24, respectively. The two ends of the first elastic element 26 are connected to the lower template 22 and the sliding element 24, respectively. The elastic force of the first elastic element 26 creates a force that causes the sliding element 24 to continuously move to the pivot position of the upper template 21 and the lower template 22, thereby driving the connecting rod 25 to swing synchronously, creating a force that can lift the upper template 21 upwards. Preferably, the first elastic element 26 can be a tension spring. Pull rings are provided at the end of the lower template 22 near the baking cavity 101 and at the sliding element 24. The hooks at both ends of the first elastic element 26 hook into the pull rings of the lower template 22 and the sliding element 24, respectively. Through the contractile elastic force generated by the stretching of the first elastic element 26, the sliding element 24 can be pulled towards the interior of the baking cavity 101, thereby driving the upper template 21 to rotate upwards and separate from the lower template 22 through the transmission of the connecting rod 25, realizing the automatic opening of the mold 2.

[0066] During operation, as shown in the attached document Figure 3 and 14 As shown, after the mold 2 moves into position outside the baking cavity 101, one end of the lower mold plate 22 remains inside the baking cavity 101 to maintain the overall stability of the mold 2. The first elastic element 26 releases its elastic force and drives the sliding element 24 to move towards the hinge position between the upper mold plate 21 and the lower mold plate 22. Through the movement of the sliding element 24, the linkage rod 25 moves, causing the upper mold plate 21 to rotate upward around the hinge point and lift up, thus realizing the automatic opening of the mold 2. When the mold 2 is pushed into the baking cavity 101, as shown in the attached figure... Figure 6 and 11 As shown, the upper mold plate 21, guided and limited by the first guide surface 11, gradually rotates downwards and into the baking cavity 101 until it is tightly fitted with the lower mold plate 22, completing the automatic mold closing. This structure achieves automatic mold opening and closing simultaneously through the reciprocating motion of pulling out and pushing in the mold plate 2, eliminating the need for manual flipping or moving of the upper mold plate 21, significantly reducing manual labor intensity. It also ensures consistency between the mold opening and closing actions and the pulling out and pushing in of the mold plate 2, thus improving overall processing efficiency and ease of operation.

[0067] Please refer to the appendix. Figure 3 , 69. A support portion 221 is provided at the end of the lower template 22 facing away from the baking cavity 101. A slide rail 231 extends along the bottom surface of the lower template 22 to the area below the support portion 221. The upper template 21 and the lower template 22 are pivotally connected at the end of the support portion 221 near the outside of the baking cavity 101. Stop bars 222 are fixed on both sides of the bottom surface of the support portion 221. Strip grooves 102 are provided on both sides of the partition 12 at the bottom of the baking cavity 101. The strip grooves 102 are parallel to the inner and outer directions of the baking cavity 101, and the stop bars 222 extend into the strip grooves 102. When the upper mold plate 21 is moved out of the baking cavity 101 and lifted upward, the stop bar 222 moves synchronously with the mold 2 to abut against the side wall of the strip groove 102 near the outside of the baking cavity 101. This structure forms a travel limit for the mold 2 to move out of the baking cavity 101, effectively preventing the mold 2 from detaching from the baking cavity 101 due to excessive movement. At the same time, the bearing part 221 can form a stable connection support for the partially suspended mold 2 after it is moved out, ensuring the overall stability of the mold 2 in the mold opening state, and facilitating the safe handling of parts and materials by the operator.

[0068] As attached Figures 18 to 21 As shown, the lifting device includes a fixed cylinder 31, a swivel column 32, a push sleeve 33, an ejector pin holder 34, and a moving part 35. One end of the fixed cylinder 31 has a first annular groove 3101 and a second annular groove 3102 sequentially arranged along its axial direction. Flat grooves 3103 are provided on both sides of the fixed cylinder 31 between the first and second annular grooves 3101 and 3102, parallel to the axial direction of the fixed cylinder 31. The two ends of the flat grooves 3103 are respectively connected to the first and second annular grooves 3101 and 3102. Additionally, an embedding groove 3104 is provided above the second annular groove 3102 in the fixed cylinder 31 to accommodate the ejector pin holder 34. A first strip-shaped hole 3105 penetrating through the inside and outside of the fixed cylinder 31 is provided at the bottom of the fixed cylinder 31, parallel to the axial direction of the fixed cylinder 31. The fixed cylinder 31 is fixed inside the lower template 22. (See attached diagram.) Figure 7 and 8 A receiving groove 2202 is opened at the center line position of the bottom surface of the lower template 22. The fixing cylinder 31 is adapted to be embedded in the receiving groove 2202. The lower template 22 seals the first sealing plate 27 at the opening of the receiving groove 2202 by means of screws. The fixing cylinder 31 is reliably restricted inside the lower template 22 by the cooperation between the first sealing plate 27 and the receiving groove 2202.

[0069] Please refer to the appendix. Figure 22The spiral groove column 32 has a recessed spiral groove 3201 extending along a spiral line on its annular surface. One end of the spiral groove column 32 also has a limiting ring 321 with an outwardly expanding diameter. Both radially opposite sides of the limiting ring 321 have protruding stops 322. The limiting ring 321 is adapted to move within the fixed cylinder 31. The stops 322 are fitted with a clearance fit to the size of the flat groove 3103, allowing the stops 322 to pass through the flat groove 3103 and move relative to the first annular groove 3101 and the second annular groove 3102. (See attached diagram.) Figure 23 The push sleeve 33 is externally fixed with a passive pin 331, and internally fixed with a limiting pin 332. The limiting pin 332 protrudes relative to the inner wall of the push sleeve 33. Both the passive pin 331 and the limiting pin 332 can be bolts, which are fixed by passing through the side wall of the push sleeve 33 through a threaded connection. The push sleeve 33 is adapted to fit on one end of the spiral groove column 32 with a spiral groove 3201. At the same time, the limiting pin 332 is fitted into the spiral groove 3201 with a clearance fit. The passive pin 331 passes through the first strip hole 3105 and the first sealing plate 27 of the lower template 22. The first sealing plate 27 has a second strip hole 2701. The passive pin 331 passes through the second strip hole 2701 to restrict the push sleeve 33 and the fixed cylinder 31 from rotating relative to the lower template 22. In addition, the partition plate 12 at the bottom of the baking cavity 101 is provided with a slide groove 103. The extension direction of the slide groove 103 is parallel to the inner and outer direction of the baking cavity 101. After the passive pin 331 passes through the first sealing plate 27, it extends downward and is placed inside the slide groove 103.

[0070] Preferably, the fixing cylinder 31 can adopt a splicing structure of two semi-cylinders. The two semi-cylinders are connected by screws to form a complete fixing cylinder 31. After the two semi-cylinders are spliced, they simultaneously form the internal groove structure such as the first annular groove 3101, the second annular groove 3102, and the flat groove 3103 inside the fixing cylinder 31. Through this splicing structure design, it is easy to smoothly assemble the push sleeve 33 and the swivel column 32 into the inside of the fixing cylinder 31.

[0071] As attached Figure 3 As shown, an ejector hole 2203 is provided in the forming groove 201 of the lower template 22. Refer to the attached diagram. Figure 18 The ejector pin holder 34 is equipped with ejector pins 341, and the ejector pin holder 34 is blocked in the lower template 22 by the embedding groove 3104 of the fixing cylinder 31. The ejector pins 341 are adapted to the ejection hole 2203 and penetrate into the ejection hole 2203. (See attached diagram.) Figures 6 to 8The ejector pin holder 34 includes a crossbar 342, both ends of which are fixed with ejector pins 341. The lower template 22 has a horizontal groove 2204 at a position corresponding to the receiving groove 2202. The position of the horizontal groove 2204 corresponds to the position of the second annular groove 3102 after the fixed cylinder 31 is placed into the receiving groove 2202. When assembling the ejector pin holder 34, first place the crossbar 342 inside the cross groove 2204, and simultaneously insert the two ejector pins 341 at both ends of the crossbar 342 into the two ejector holes 2203 respectively. Then, place the fixing cylinder 31 inside the receiving groove 2202, and fit the embedding groove 3104 of the fixing cylinder 31 onto the outside of the crossbar 342 to limit the ejector pin holder 34. After that, fix the first sealing plate 27 on the outside of the groove opening of the receiving groove 2202 to complete the overall installation of the ejector pin holder 34, ensuring that the ejector pin holder 34 will not be displaced after installation, and ensuring that the ejector pins 341 remain in the ejector holes 2203 for relative telescopic movement.

[0072] With the above structure, during the process of pulling the lower template 22 out of the baking cavity 101 and causing the upper template 21 to open upwards, the lower template 22 moves out of the baking cavity 101, simultaneously driving the fixed cylinder 31 and the passive pin 331 to move accordingly. When the passive pin 331 is blocked in the slide groove 103 and cannot move out of the baking cavity 101 synchronously with the lower template 22, the lower template 22 continues to maintain the trend of moving out of the baking cavity 101, driving the push sleeve 33 to move relative to the fixed cylinder 31, so that the passive pin 331 pushes the stop block 322 of the swivel column 32 along the flat groove 3103 from the first annular groove 3101 to the second... As the annular groove 3102 moves in the direction of the limit ring 321 against the side wall of the second annular groove 3102, the push sleeve 33 continues to move with the lower template 22, causing the limit pin 332 to push the spiral groove 3201 to rotate the spiral groove column 32, causing the stop block 322 to flip and push the ejector pin frame 34 out of the embedded groove 3104. The ejector pin frame 34 then drives the ejector pin 341 to move upward, smoothly ejecting the molded badminton racket embedded in the molding groove 201. The automatic ejection of the badminton racket can be achieved by relying on the outward movement of the mold 2 and the linkage of the lifting device, without the need for additional driving parts to participate in the ejection action, which is very convenient.

[0073] As attached Figure 9 and 10 As shown, the obstruction of the passive pin 331 can be achieved by the side wall of the slide groove 103 near the outer end of the baking cavity 101, or by a movable member 35 that slides within the slide groove 103. See also the attached diagram. Figure 24Steps 121 are formed on both sides of the slide groove 103 along its length. Moving parts 351 protrude from both sides of the moving member 35, respectively resting on the two steps 121 of the slide groove 103. A second sealing plate 28 is then fixed to the two steps 121 by through screws. A pad (not shown in the attached drawing) is embedded between the second sealing plate and the steps. The thickness of this pad creates a gap that restricts the moving part 351 within the gap between the steps 121 and the second sealing plate 28, thereby limiting the moving member 35 to move only along the length of the slide groove 103 and ensuring the stability of the moving member 35's movement. (Refer to the attached drawing.) Figure 15 The upper end of the movable member 35 is provided with an elastically telescopic push block 36. The push block 36 can be configured such that the two ends of the movable member 35 are respectively provided with a telescopic groove 3501 and a clearance groove 3502, and the portion of the movable member 35 between the telescopic groove 3501 and the clearance groove 3502 is provided with a clearance hole. The push block 36 is provided with a limiting shaft 361. After the limiting shaft 361 passes through the clearance hole, it is fixed to the mounting part 362 in the clearance groove 3502. The mounting part 362 can be a nut structure fixed by a threaded connection. A third elastic member 37 is provided between the push block 36 and the telescopic groove 3501 near the bottom surface of the clearance groove 3502. The third elastic member 37 can be a spring structure sleeved outside the limiting shaft 361. The elastic force of the third elastic member 37 forms a force that pushes the push block 36 out of the telescopic groove 3501, thereby achieving the elastic telescopic effect of the push block 36 at the upper end of the movable member 35.

[0074] Please refer to the appendix. Figure 9 and 10 The movable component 35 is adapted to move within the slide groove 103, and the push block 36 has an inclined second guide surface 363 on the side facing the outside of the baking cavity 101. A second elastic element 38 is connected between the movable component 35 and the inner wall of the slide groove 103 near the outside of the baking cavity 101. The second elastic element 38 can also be a spring, and the elasticity of the second elastic element 38 generates a force that continuously pushes the movable component 35 into the baking cavity 101. A blocking pin 132 is fixed to the bottom surface of the slide groove 103, which abuts against the movable component 35, thereby limiting the stroke of the movable component 35 as it moves into the baking cavity 101 pushed by the second elastic element 38. In addition, when the movable component 35 is installed in the slide groove 103, a guide pin 122 is fixed to the side wall of the slide groove 103 near the outside of the baking cavity 101, providing structural support for the subsequent cooperation between the push block 36 and the guide pin 122.

[0075] As the lower template 22 moves out of the baking cavity 101, causing the fixed cylinder 31 and the driven pin 331 to move, when the driven pin 331 is blocked by the slide groove 103 and cannot continue to move, the lower template 22 continues to move, causing the push sleeve 33 to move relative to the fixed cylinder 31. This causes the driven pin 331 to push the stop block 322 of the swivel column 32 to move from the first annular groove 3101 to the second annular groove 3102 on the flat groove 3103. After this action is completed, the lower template 22 continues to move out of the baking cavity 101, causing the moving part 35 to overcome the elastic force of the second elastic part 38 and continue to move out of the baking cavity 101. Until the second guide surface 363 of the push block 36 abuts against the guide pin 122 and is squeezed by the guide pin 122, it retracts into the shrinkage groove. At this time, the passive pin 331 continues to move out of the baking cavity 101 with the movement of the push sleeve 33, passes over the push block 36 and finally moves out of the slide groove 103. This effectively avoids the passive pin 331 from being unable to continue moving due to obstruction, and prevents the mold 2 from being unable to move out of the baking cavity 101 smoothly. At the same time, relying on the linkage of the mechanical structure, the ejection action and the mold 2 removal action do not interfere with each other, ensuring the continuity of each action process of the equipment.

[0076] Please refer to the appendix. Figure 14 and 15 During the process of the lower template 22 moving into the baking cavity 101 and driving the upper template 21 to close downwards, the lower template 22 simultaneously drives the fixed cylinder 31 and the passive pin 331 to move into the baking cavity 101. When the passive pin 331 moves to the second guide surface 363 of the push block 36, the passive pin 331 squeezes the second guide surface 363 and drives the push block 36 to retract downwards, so that the passive pin 331 can smoothly pass over the push block 36 and continue to move into the baking cavity 101. Then, as the lower template 22 continues to move until the passive pin 331 is blocked by the side wall of the slide groove 103 near the baking cavity 101, the lower template 22 continues to move, causing the push sleeve 33 to move relative to the fixed cylinder 31. This causes the passive pin 331 to push the stop block 322 of the swivel column 32 to move along the flat groove 3103 from the second annular groove 3102 to the first annular groove 3101. This causes the ejector pin frame 34 to lose the support of the limiting ring 321 and fall back. Simultaneously, this causes the ejector pin 341 to retract downward into the ejection hole 2203. This allows the top of the ejector pin 341 and the bottom surface of the forming groove 201 to form a forming curved surface that fits the shape of the badminton racket, providing a regular cavity surface for the subsequent hot pressing forming of the badminton racket blank.

[0077] In addition, please refer to the appendix Figure 8 The lower template 22 has through-holes 2205 at both ends of the receiving groove 2202 corresponding to the baking cavity 101, and then refers to the attached drawing. Figure 13 , 16In section 19, the axial through-hole of the swirl column 32 allows the air guide pipe 44 to pass through the through-hole 2205 and the axial through-hole of the swirl column 32 with a clearance fit. Similarly, the air inlet pipe 42 also passes through the through-hole 2205 and the axial through-hole of the swirl column 32. This structural design effectively avoids space between the air inlet pipe 42 and the air guide pipe 44 without affecting the normal linkage operation of the various components of the jacking device, optimizing the internal structural layout of the equipment and making the overall structure of the equipment more compact and reasonable.

[0078] In summary, after the mold 2 is pulled out of the baking cavity 101, when operating the equipment of the present invention, the pre-made badminton racket 5 is placed in the forming groove 201 of the lower template 22, and then the mold 2 is pushed into the baking cavity 101. At this time, the upper template 21 is automatically flipped downward to close the mold due to the obstruction of the upper edge of the baking cavity 101. At the same time, the passive pin 331 moves with the mold 2 and first squeezes the second guide surface 363 of the push block 36 to shrink it. Then the passive pin 331 smoothly passes the push block 36. Subsequently, the passive pin 331 is blocked by the side wall of the slide groove 103 near the end of the baking cavity 101, which drives the push sleeve 33 of the lifting device and the rotating groove column 32 to reset in linkage, so that the ejector pin 341 of the ejector pin frame 34 falls back to form a complete cavity with the bottom surface of the forming groove 201. Then, with the help of the heating source in the baking oven 1 to form a high temperature environment and the air source to supply air to the middle rod 51 through the air guide 41 and the air inlet pipe 42, the badminton racket 5 expands evenly and fits into the cavity to complete the hot pressing molding. When mold 2 is pulled out of baking cavity 101, it moves in two stages by relying on the moving part 35. In the first stage, the passive pin 331 cannot move synchronously due to the obstruction of the moving part 35, which drives the push sleeve 33 and the swivel column 32 of the lifting device to move together. At the same time, the molded badminton racket is ejected while the upper mold plate 21 is automatically opened by the first elastic element 26. In the second stage, the lower mold plate 22 continues to move, which drives the moving part 35 to move against the force of the second elastic element 38. The push block 36 is squeezed and contracted by the guide pin 122. The passive pin 331 passes over the push block 36, so that mold 2 is completely removed for easy removal. The above process does not require manual movement of the upper mold plate 21 and has no additional driving parts. Mold closing, mold opening and ejection can be completed by the push and pull action of mold 2 alone, which greatly improves the operating efficiency and reduces the intensity of manual operation.

[0079] The above are merely specific embodiments of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention using the concept of the present invention shall constitute an infringement of the protection scope of the present invention.

Claims

1. A hot pressing molding device for badminton rackets, characterized in that, The device includes: A baking oven, wherein the baking oven is provided with a baking cavity, and a first guide surface is provided at the upper opening position of the baking cavity, the first guide surface being inclined upward from the inside of the baking cavity outward; The mold includes an upper template, a lower template, a connecting rod, and a first elastic element. The upper template and the lower template are hinged together. Both the upper template and the lower template are provided with forming grooves. After the upper template and the lower template are closed, the forming grooves of the upper template and the lower template are correspondingly combined to form the cavity of a badminton racket. The side of the lower template is connected to a slidable sliding element. The elastic force of the first elastic element generates a force that causes the sliding element to continuously move towards the position where the upper template and the lower template are pivotally connected. The two ends of the connecting rod are pivotally connected to the upper template and the sliding element, respectively. The mold is adapted to be embedded in the baking cavity, and the lower template is restricted to slide on the lower surface of the baking cavity; When the mold moves out of the baking cavity, one end of the lower mold plate is located inside the baking cavity. The first elastic element drives the sliding element to move towards the position where the upper mold plate and the lower mold plate are pivotally connected, and drives the connecting rod to lift the upper mold plate to realize mold opening. When the mold moves into the baking cavity, the upper template is blocked by the first guide surface and moves into the baking cavity and downwards until it fits with the lower template, thus achieving mold closing.

2. The device as described in claim 1, characterized in that, The lower template is provided with a support portion at one end facing away from the baking cavity. The upper template and the lower template are pivotally connected at one end of the support portion near the outside of the baking cavity. When the upper template is moved out of the baking cavity and lifted upward, the support portion is located inside the baking cavity.

3. The device as described in claim 2, characterized in that, The bottom surface of the bearing part is fixed with a stop bar, and the bottom surface of the baking cavity is provided with a strip groove. The strip groove is parallel to the inside and outside direction of the baking cavity, and the stop bar extends into the strip groove. When the upper template is moved out of the baking cavity and lifted upward, the stop bar moves to abut against the side wall of the strip groove near the outside of the baking cavity.

4. The device as described in claim 2 or 3, characterized in that, The bottom surface of the lower template is fixed with slide rails on both sides, the slide rails extend to the bearing part, and both slide rails are adapted to connect sliders, the sliders are fixed to the bottom surface of the baking cavity.

5. The device as described in claim 1, characterized in that, The device also includes an air guide and an air inlet pipe. The air guide has two ports. One port of the air guide is connected to the port of the prefabricated badminton racket shaft away from the frame. The air inlet pipe is disposed inside the lower template, and one end of the air inlet pipe extends out of the lower template and is connected to an air source. The other end of the air inlet pipe is connected to a bend pipe. The port of the bend pipe away from the air inlet pipe is an air inlet. The air inlet faces upward. After the prefabricated badminton racket is placed in the forming groove, the other port of the air guide away from the shaft is connected to the corresponding air inlet.

6. The device as described in claim 5, characterized in that, A gas duct is fixed on the back of the baking oven at a position corresponding to the baking cavity. One end of the gas duct is connected to a gas source, and the other end of the gas duct extends into the lower template. The end of the gas receiving pipe away from the bend is inserted into the gas duct, and a sealing ring is fitted between the outer wall of the gas receiving pipe and the inner wall of the gas duct.

7. The device as described in claim 1, characterized in that, The device also includes a lifting device, which comprises: A fixed cylinder is fixed inside the lower template. A first annular groove and a second annular groove are sequentially arranged along its axial direction inside the fixed cylinder. A flat groove is provided between the first annular groove and the second annular groove. The flat groove is parallel to the axial direction of the fixed cylinder. The two ends of the flat groove are respectively connected to the first annular groove and the second annular groove. An embedding groove is provided above the second annular groove on the fixed cylinder. A first strip-shaped hole penetrating inside and outside the fixed cylinder is provided at the bottom of the fixed cylinder. The first strip-shaped hole is parallel to the axial direction of the fixed cylinder. A spiral groove column, wherein the annular surface of the spiral groove column is provided with a recessed spiral groove extending along a spiral line, and a limiting ring is provided at one end of the spiral groove column, and protruding blocks are provided on both radial sides of the limiting ring. A push sleeve, with a passive pin fixed on the outside of the push sleeve and a limiting pin fixed inside the push sleeve, the limiting pin protruding relative to the inner wall of the push sleeve; The ejector pin holder is blocked in the lower template by the fixing cylinder and is located in the embedding groove. The lower template is provided with an ejector hole in the forming groove. The ejector pin holder is provided with an ejector pin, and the ejector pin is adapted to pass through the ejector hole. The bottom surface of the baking cavity is provided with a sliding groove, which is parallel to the inner and outer directions of the baking cavity. The limiting ring is adapted to move inside the fixed cylinder. The stop block is adapted to pass through the flat groove to the first ring groove and the second ring groove. The push sleeve is adapted to be fitted outside the end of the spiral groove column where the spiral groove is provided. The limiting pin is fitted into the spiral groove with clearance. The passive pin passes through the first strip hole and the lower template and extends into the sliding groove. As the lower template moves out of the baking cavity, causing the upper template to open upwards, the movement of the lower template moves the fixed cylinder and the passive pin. When the passive pin is blocked and cannot move out of the baking cavity synchronously with the lower template, the lower template continues to move, causing the push sleeve to move relative to the fixed cylinder. This causes the passive pin to push the stop block of the swivel column to move from the first annular groove to the second annular groove on the flat groove. After the limiting ring abuts against the side wall of the second annular groove, the push sleeve continues to move, causing the limiting pin to push the spiral groove and rotate the swivel column. This causes the stop block to flip and push the ejector pin holder out of the embedded groove, thereby pushing the ejector pin to push out the badminton racket formed in the molding groove. As the lower template moves into the baking cavity, causing the upper template to close downwards, the movement of the lower template into the baking cavity also causes the fixed cylinder and the passive pin to move. When the passive pin is blocked by the side wall of the slide groove near one end of the baking cavity, the lower template continues to move, causing the push sleeve to move relative to the fixed cylinder. This causes the passive pin to push the stop block of the swivel column to move from the second annular groove to the first annular groove on the flat groove. This causes the ejector pin frame to lose the support of the limiting ring and fall back, causing the ejector pin to fall back as well. This allows the top of the ejector pin and the bottom surface of the forming groove to together form a forming curved surface that adapts to the shape of a badminton racket.

8. The device as described in claim 7, characterized in that, The lifting device also includes a movable component, the upper end of which is provided with an elastically telescopic push block. The push block is provided with an inclined second guide surface on the side facing the outside of the baking cavity. The movable component is adapted to move within the slide groove. A second elastic component is connected between the movable component and the inner wall of the slide groove near the outside of the baking cavity. The elastic action of the second elastic component forms a force that continuously pushes the movable component into the baking cavity. The guide pin is fixed to the side wall of the chute near the outside of the baking cavity; As the lower template moves out of the baking cavity, causing the fixed cylinder and the passive pin to move, when the passive pin is blocked by the push block, the lower template continues to move, causing the top push sleeve to move relative to the fixed cylinder. This causes the passive pin to push the stop block of the swivel column to move from the first annular groove to the second annular groove on the flat groove. Then, the lower template continues to move, causing the moving part to continue moving against the elastic force of the second elastic part. When the second guide surface of the push block is blocked by the guide pin and descends, the passive pin continues to move, passing over the push block and moving out of the slide groove.

9. The device as described in claim 8, characterized in that, The movable component is provided with a telescopic groove, and the movable component is provided with a relief groove on the side opposite to the telescopic groove. A relief hole is provided between the telescopic groove and the relief groove. The push block is provided with a limiting shaft. The limiting shaft passes through the relief hole and is fixedly installed in the relief groove. A third elastic element is provided between the push block and the telescopic groove near the bottom surface of the relief groove. The elastic force of the third elastic element forms a force that continuously pushes the push block out of the telescopic groove.

10. The device as claimed in claim 7, characterized in that, The device also includes an air guide and an air inlet pipe. The air guide has two ports. One port of the air guide is connected to the port of the prefabricated badminton racket shaft away from the frame. The axial groove column has a through hole. The air inlet pipe passes through the axial through hole of the axial groove column with a clearance fit. One end of the air inlet pipe extends out of the lower template and is connected to an air source. The other end of the air inlet pipe is connected to a bend pipe. The port of the bend pipe away from the air inlet pipe is an air inlet hole, which faces upward. After the prefabricated badminton racket is placed in the forming groove, the other port of the air guide away from the shaft is connected to the corresponding air inlet hole.

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