Waist structure forming mold

Abstract

The application relates to the field of molds, and provides a waist-shaped structure forming mold, which comprises an upper mold and a lower mold; a forming cavity is arranged in the upper mold, a pouring element is arranged at the top of the upper mold, and the pouring element extends into the forming cavity; the lower mold is provided with an ejection assembly connected with the upper mold; the forming cavity is divided into an S-shaped cavity and a plurality of communication cavities, the communication cavities are communicated with the S-shaped cavity, the S-shaped cavity extends in a direction away from the pouring element, the upper mold further comprises a first forming element, the first forming element is in sliding connection with the pouring element, the S-shaped cavity is arranged in the first forming element, a part of the communication cavities is located in the first forming element, the lower mold further comprises a second forming element, the second forming element is provided with another part of the communication cavities, and the communication cavities are complete when the first forming element is in butt joint with the second forming element. The application has the effect of stable demolding.

Description

Technical Field

[0001] This application relates to the field of molds, and in particular to a waist-shaped structure forming mold. Background Technology

[0002] TPU transparent soft rubber waist-shaped structures are generally used for crib legs to provide protection similar to a fence. However, these waist-shaped structures require the use of a molding mold during manufacturing. Molten soft rubber is injected into the molding mold and then solidified to form the desired shape.

[0003] However, because the waist-shaped structure has curvature, such as S-shape or serpentine shape, there are too many bends during injection molding. This makes it easy for the upper and lower molds to affect the newly formed waist-shaped structure when demolding, resulting in the waist-shaped structure breaking or having cracks, making it difficult to guarantee production quality. Summary of the Invention

[0004] To address the aforementioned issues, this application provides a waist-shaped structure forming mold.

[0005] The technical solution for the waist-shaped structure forming mold provided in this application is as follows:

[0006] A waist-shaped molding die includes an upper die and a lower die. The upper die has a molding cavity and a casting element at its top, extending into the molding cavity. The lower die has an ejector assembly connected to the upper die. The molding cavity is divided into an S-shaped cavity and several connecting cavities, which communicate with the S-shaped cavity and extend away from the casting element. The upper die also includes a first molding component slidably connected to the casting element. The S-shaped cavity is located within the first molding component, and a portion of the connecting cavities is located within the first molding component. The lower die also includes a second molding component; the second molding component has the connecting cavity... In the other part of the cavity, when the first molded part and the second molded part are connected, the communicating cavity is complete; the ejection assembly includes an ejection structure and a pneumatic structure; the ejection structure passes through the lower mold and the second molded part, and is connected to the first molded part. After the injection molding material is poured into the molding cavity and cured, the ejection structure ejects the first molded part towards the casting part, causing the injection molding material to loosen and demold; the pneumatic structure is connected to the second molded part and provides airflow to the communicating cavity. The airflow diffuses in the molding cavity, causing the injection molding material to be separated from the inner wall of the molding cavity by the airflow and air pressure, thus completing demolding in conjunction with the ejection structure.

[0007] By adopting the above technical solution, the airflow and appropriate air pressure diffuse within the molding cavity, causing the injection molding material, which is still at a high temperature and has softened but is stubbornly attached to the inner wall of the molding cavity, to be blown away and separated by the airflow. Under the influence of air pressure and airflow, the injection molding material separates from the inner wall of the molding cavity, and together with the ejection structure, a stable demolding effect is achieved.

[0008] Optionally, the second molded part includes a vent seat, a stabilizing seat, and a positioning seat; the positioning seat has a plurality of guide openings, and the ejection structure is slidably connected to the guide openings; the vent seat is installed on the positioning seat, and the vent seat has a vent cavity, which is connected to the pneumatic structure; the stabilizing seat is connected to the vent seat, and part of the connecting cavity is located on the stabilizing seat.

[0009] By adopting the above technical solution, the ejector structure pushes the first molded part upward along the guide port. The injection material is protected by the injection material in the upper part of the connecting cavity of the stabilizing seat. The starting structure delivers airflow to the connecting cavity at the stabilizing seat through the venting cavity, and the injection material is separated from the adhesive connecting cavity part by the airflow. Then, the first molded part is separated from the second molded part by the action of the ejector structure to achieve the demolding effect. In the demolding process, the injection material is protected to ensure the integrity of the injection material.

[0010] Optionally, the ejection structure includes an ejection plate, a first ejection post, a second ejection post, a first elastic part, and a second elastic part; the lower mold has an ejection outlet, and an external driving device is inserted into the ejection outlet; the ejection plate is located inside the lower mold and is slidably connected to the lower mold, and covers the ejection outlet; several first ejection posts are provided, all installed on the ejection plate, and the other end passes through the guide opening and is connected to the first molding part; the first elastic part is wrapped around the first ejection post, and one end is connected to the positioning seat, and the other end is connected to the ejection plate; one end of the second ejection post is connected to the casting part, and the other end extends through the first molding part and the second molding part toward the lower mold, and is spaced at a preset distance from the ejection plate; the second elastic part is wrapped around the second ejection post, and one end is connected to the casting part, and the other end is connected to the second molding part.

[0011] By adopting the above technical solution, the ejector plate is driven by a device that extends from the top outlet and pushes the top outlet toward the casting part, causing the first ejector column to move the first molded part toward the casting part, thereby separating the first molded part from the second molded part. In conjunction with the pneumatic structure, the formed waist-shaped structure is detached from the molding cavity. Subsequently, the ejector plate moves a preset distance and pushes the second ejector column, causing the second ejector column to push open the casting part, so as to facilitate the removal of the product, thereby achieving the function of convenient demolding and material removal. The first elastic part and the second elastic part are used to reset the ejector plate and the casting part, respectively.

[0012] Optionally, the ejection structure further includes an ejection part, one end of which is connected to the ejection plate, and the other end of which passes through the positioning seat and is inserted into the stabilizing seat.

[0013] By adopting the above technical solution, when the ejector is pushed by the ejector plate, it can penetrate the stabilizing seat and move towards the formed waist-shaped structure. After contacting the waist-shaped structure, it pushes the waist-shaped structure towards the casting part, and simultaneously cooperates with the first ejector column to separate the first and second forming parts, so as to separate the waist-shaped structure.

[0014] Optionally, the pneumatic structure includes a pneumatic pump, a delivery pipe, and a pneumatic tube; the pneumatic tube is located inside the ventilation cavity and communicates with the ventilation cavity; the delivery pipe is connected to the pneumatic tube and extends outward from the upper mold; the pneumatic pump is connected to one end of the delivery pipe outside the upper mold, and the pneumatic pump provides airflow delivery and air pressure regulation.

[0015] By adopting the above technical solution, the pneumatic pump provides the airflow and sufficient air pressure required for pneumatic operation, which is delivered to the pneumatic tube through the delivery pipe. The pneumatic tube is connected to each ventilation cavity and delivers the airflow to the connecting cavity. This causes the waist-shaped structure in the connecting cavity to be affected by the airflow and air pressure, separating it from the parts that are stuck or attached to the connecting cavity. After separation, the airflow is blown by the connecting cavity to the S-shaped cavity, which then separates the parts that are stuck or attached to the S-shaped cavity. At the same time, the airflow can also cool the product to improve the efficiency of curing and molding.

[0016] Optionally, the second molded part further includes a cooling seat, which is connected to the stabilizing seat; the cooling seat is provided with a plurality of cooling pipes, which are connected to the delivery pump.

[0017] By adopting the above technical solution, the cooling seat exchanges heat with the product formed in the connecting cavity. Combined with the airflow delivered by the pneumatic tube, the product can be cooled quickly, improving material handling efficiency. At the same time, due to thermal expansion and contraction, the product will shrink slightly in volume as it gradually cools down, which increases the gap between the product and the inner wall of the forming cavity, allowing the airflow to flow more quickly and stably. This not only provides a cooling effect but also enables the airflow to more stably separate the product from the adhesion or attachment points of the inner wall of the forming cavity.

[0018] Optionally, several cooling pipes are simultaneously embedded in the positioning seat.

[0019] By adopting the above technical solution, the positioning seat will be simultaneously subjected to heat transfer, increasing the heat dissipation area. Therefore, by setting several cooling pipes inside the positioning seat, the positioning seat can also be cooled through the cooling pipes when it is subjected to heat transfer, so as to quickly cool the positioning seat and further improve the overall cooling effect.

[0020] Optionally, both the cooling seat and the positioning seat have a pushing cavity, and the two pushing cavities are interconnected; the pushing cavity has a pushing structure, which is connected to the ejector portion; the cooling seat also has a connecting sleeve, which is located inside the connecting cavity, and the inner cavity of the connecting sleeve is aligned with the S-shaped cavity. After the injection molding material fills the S-shaped cavity, the inner cavity of the connecting sleeve replaces part of the connecting cavity on the second molded part that is filled with injection molding material; the pushing structure abuts against the connecting sleeve.

[0021] By adopting the above technical solution, when the ejector needs to eject the product, it will drive the pushing structure to move along the pushing cavity. During the movement, the pushing structure contacts the connecting sleeve and pushes the connecting sleeve, causing the connecting sleeve to rotate slightly, thereby fixing the position of the product inside the connecting sleeve. The slight rotation of the connecting sleeve will loosen the connection between the connecting sleeve and the product, thereby further providing a stable demolding effect.

[0022] Optionally, the connecting cavity is connected to the pushing cavity, and the pushing structure includes a pushing frame, a rack, and a positioning frame; the pushing frame is located in the pushing cavity and is connected to any of the ejector portions near the outer wall of the lower mold; a plurality of positioning frames are provided, all of which are embedded in the pushing cavity; the rack is located in the pushing cavity and is slidably connected to the positioning frame through a through-hole manner; the rack has two opposing first wedge blocks at one end near the pushing frame, and the pushing frame has two second wedge blocks at one end near the rack, with the two first wedge blocks located between the two second wedge blocks; the connecting sleeve has teeth at the connection between the connecting cavity and the pushing cavity, and the connecting sleeve engages with the rack through the teeth.

[0023] By adopting the above technical solution, the push structure cooperates with the ejector, so that the push frame drives the connecting sleeve to rotate slightly through the rack, which loosens the product formed inside the connecting sleeve, allowing the airflow generated by the pneumatic structure to be transported stably, and further improving the stability of the separation between the product and the connecting sleeve.

[0024] Optionally, there is a preset interval between the first wedge block and the second wedge block.

[0025] By adopting the above technical solution, the ejector needs to move a preset interval before the second wedge block can contact the first wedge block. This results in a smaller degree of actual pushing of the rack by the ejector and the pusher, and a smaller rotation range of the connecting sleeve. Only a slight rotation of the connecting sleeve is needed to loosen the product inside and allow it to be ejected in conjunction with the pneumatic structure and the ejector. This prevents the product from being damaged by excessive torque due to excessive rotation of the connecting sleeve.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. By diffusing airflow and appropriate air pressure within the molding cavity, the injection molding material, which is still at a high temperature and has softened but is stubbornly attached to the inner wall of the molding cavity, is blown away by the airflow and separated from the inner wall of the molding cavity under the influence of air pressure and airflow. This, combined with the ejection structure, achieves a stable demolding effect.

[0028] 2. The ejector structure pushes the first molded part upward along the guide port. The injection material is protected by the injection material in the upper part of the connecting cavity of the stabilizing seat. The starting structure delivers airflow to the connecting cavity at the stabilizing seat through the venting cavity. The airflow separates the injection material from the part of the connecting cavity that is stuck together. Then, the first molded part is separated from the second molded part by the ejector structure to achieve the demolding effect. During the demolding process, the injection material is protected to ensure its integrity.

[0029] 3. The ejector plate is driven by a device that extends from the top outlet and pushes the top outlet toward the casting part, causing the first ejector column to move the first molded part toward the casting part, thereby separating the first molded part from the second molded part. In conjunction with the pneumatic structure, the formed waist-shaped structure is removed from the molding cavity. Then, the ejector plate moves a preset distance and pushes the second ejector column, causing the second ejector column to push open the casting part to facilitate product removal, thereby achieving the function of convenient demolding and material removal. The first elastic part and the second elastic part are used to reset the ejector plate and the casting part, respectively.

[0030] 4. When the ejector is pushed by the ejector plate, it can penetrate the stabilizing seat and move towards the formed waist-shaped structure. After contacting the waist-shaped structure, it pushes the waist-shaped structure towards the casting part, and simultaneously cooperates with the first ejector column to separate the first and second forming parts, so as to separate the waist-shaped structure. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of the molded product required for this application;

[0032] Figure 2 This is a three-dimensional structural schematic diagram of the mold in some embodiments of this application;

[0033] Figure 3 This is a partial three-dimensional schematic diagram of the mold cross-section state in some embodiments of this application;

[0034] Figure 4 These are exploded structural diagrams of the molds in some embodiments of this application;

[0035] Figure 5 This is a schematic diagram of the cross-sectional structure of the mold in some embodiments of this application;

[0036] Figure 6 This application Figure 5A magnified structural diagram of A in the middle;

[0037] The labels in the attached diagram are as follows: 1. Upper mold; 11. Molding cavity; 111. S-shaped cavity; 112. Communicating cavity; 113. Communicating sleeve; 12. Casting part; 13. First molding part; 2. Lower mold; 21. Second molding part; 212. Vent seat; 2121. Vent cavity; 213. Stabilizing seat; 214. Positioning seat; 2141. Guide port; 215. Cooling seat; 2151. Pushing cavity; 22. Top outlet; 23. Pushing structure; 231 1. Pushing frame, 2311. Second wedge block, 232. Rack, 2321. First wedge block, 233. Positioning frame, 3. Ejection assembly, 31. Ejection structure, 311. Ejection plate, 312. First ejection column, 313. Second ejection column, 314. First elastic part, 315. Second elastic part, 316. Ejection part, 32. Pneumatic structure, 321. Pneumatic pump, 322. Conveying pipe, 323. Pneumatic pipe, 324. Cooling pipe. Detailed Implementation

[0038] The following specific examples illustrate the implementation methods of this application. Those skilled in the art can easily understand other advantages and effects of this application from the information disclosed herein. This application can also be implemented or applied through other different specific embodiments, and various details in this application can be modified or changed according to different viewpoints and application systems without departing from the spirit of this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0039] The embodiments of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily implement the application. This application may be embodied in many different forms and is not limited to the embodiments described herein.

[0040] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics represented in connection with that embodiment or example, which are included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate different embodiments or examples represented in this application, as well as features of different embodiments or examples.

[0041] Furthermore, the terms "first" and "second" are used only to indicate an objective and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the representation of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0042] Throughout this specification, when it is said that a device is "connected" to another device, this includes not only "direct connection" but also "indirect connection" by placing other components in between. Furthermore, when it is said that a device "comprises" a certain constituent element, unless otherwise stated otherwise, this does not exclude other constituent elements, but rather implies that other constituent elements may be included.

[0043] The following is in conjunction with the appendix Figure 1 -Appendix Figure 6 This application will be described in further detail below.

[0044] This application discloses a waist-shaped structure forming mold.

[0045] A waist-shaped molding die, used for molding products as a reference. Figure 1 The waist-shaped structure shown is referred to below as the product.

[0046] refer to Figure 2 As shown, it includes an upper mold 1 and a lower mold 2; the upper mold 1 has a molding cavity 11 and a casting part 12 on the top. The casting part 12 can be a casting cap, and a casting hopper is connected to the casting cap. The casting part 12 extends into the molding cavity 11, so that the injection molding material enters the molding cavity 11 from the casting hopper. After the injection molding material fills the molding cavity 11, it is cooled and solidified to form a product.

[0047] The lower mold 2 is provided with an ejector assembly 3, which is connected to the upper mold 1. The ejector assembly 3 is used for demolding the molded product and separating the upper mold 1 from the mold 1.

[0048] In order to correspond to the shape of the molded product, the molding cavity 11 is divided into an S-shaped cavity 111 and several connected cavities 112. The connected cavities 112 are connected to the S-shaped cavity 111, and the S-shaped cavity 111 extends in the direction away from the casting part 12. When the injection molding material fills the entire S-shaped cavity 111 and several connected cavities 112, the product can be formed after cooling and solidification.

[0049] The upper mold 1 also includes a first molding part 13, which is slidably connected to the casting part 12. That is, the first molding part 13 has several through holes, and the casting part 12 has through posts corresponding to the through holes. The through posts are inserted into the through posts and can move along the through posts, so that the first molding part 13 can slide along the casting part 12. Conversely, if the first molding part 13 is provided with through posts, the casting part 12 can also achieve the same effect. No specific limitation is made here.

[0050] The S-shaped cavity 111 is formed in the first molding part 13, and a part of the connecting cavity 112 is located in the first molding part 13. The lower mold 2 also includes a second molding part 21, which has another part of the connecting cavity 112. When the first molding part 13 and the second molding part 21 are connected, the connecting cavity 112 is complete. When demolding, the upper mold 1 and the lower mold 2 are separated, so that the first molding part 13 and the second molding part 21 are separated, thereby separating the molded product from part of the connecting cavity 112 of the second molding part 21, which facilitates demolding.

[0051] The ejection assembly 3 includes an ejection structure 31 and a pneumatic structure 32. The ejection structure 31 passes through the lower mold 2 and the second molding part 21 and is connected to the first molding part 13. The drive end required by the ejection structure 31 can be connected to an external drive component. The external drive component passes through the lower mold 2 and abuts against the ejection structure 31, and can push the ejection structure 31.

[0052] After the injection molding material is poured into the molding cavity 11 and cured, the ejector end of the ejector structure 31 passes through the lower mold 2 and the second molding part 21 to eject the first molding part 13 toward the casting part 12. The part of the connecting cavity 112 on the first molding part 13 is separated from the part of the connecting cavity 112 on the second molding part 21, so that the injection molding material is loosened to facilitate demolding. The ejector structure 31 continues to push, which can separate the casting part 12 from the first molding part 13, thereby opening the S-shaped cavity 111 to remove the molded product.

[0053] The pneumatic structure 32 is connected to the second molded part 21 and provides air pressure to the connecting cavity 112. The airflow travels in the molding cavity 11, including the S-shaped cavity 111 and the connecting cavity 112. The airflow and appropriate air pressure diffuse in the molding cavity 11, causing the injection material that is still at a high temperature and is softened and stubbornly attached to the inner wall of the molding cavity 11 to be blown away and separated by the airflow. Under the influence of air pressure and airflow, the injection material is separated from the inner wall of the molding cavity 11, and a stable demolding effect is achieved in conjunction with the ejection structure 31.

[0054] By utilizing the ejection structure 31 and pneumatic structure 32 of the ejection assembly 3, the first molded part 13 and the second molded part 21 can be stably separated after the product is formed, which can prevent breakage or cracks and ensure the integrity of the product.

[0055] Furthermore, the second molded part 21 includes a vent seat 212, a stabilizing seat 213, and a positioning seat 214; the positioning seat 214 has a plurality of guide ports 2141, the ejection structure 31 is slidably connected to the guide ports 2141, the guide ports 2141 can provide space for sliding and lifting when the ejection structure 31 is ejected, and provide a guiding function to avoid the ejection position from shifting.

[0056] The vent seat 212 is installed on the positioning seat 214, and the vent seat 212 is provided with a vent chamber 2121. The vent chamber 2121 is connected to the pneumatic structure 32, which provides airflow and air pressure supply. The airflow is delivered from the vent chamber 2121 to the connecting cavity 112, so that the airflow can blow the molded product in the connecting cavity and separate the product from the part attached or stuck in the connecting cavity 112 or S-shaped cavity 111 through airflow separation.

[0057] The stabilizing seat 213 is connected to the vent seat 212, and part of the connecting cavity 112 is located on the stabilizing seat 213. The stabilizing seat 213 is used to stabilize the injection molding material in the connecting cavity 112, so as to prevent the injection molding material from shifting or bending when it is ejected, and to provide protection for the injection molding material.

[0058] Specifically, the ejector structure 31 pushes the first molded part 13 upward along the guide port 2141. The injection material is protected by the injection material in the upper part of the connecting cavity 112 of the stabilizing seat 213. The starting structure delivers airflow to the connecting cavity 112 at the stabilizing seat 213 through the venting cavity 2121, causing the injection material to separate from the part of the connecting cavity 112 by the airflow. Subsequently, the first molded part 13 is separated from the second molded part 21 by the ejector structure 31 to achieve the demolding effect. During the demolding process, the injection material is protected to ensure its integrity.

[0059] In some embodiments, the ejection structure 31 includes an ejection plate 311, a first ejection post 312, a second ejection post 313, a first elastic part 314, and a second elastic part 315; the lower mold 2 has an ejection outlet 22, an external driving device is inserted into the ejection outlet 22, the ejection plate 311 is located inside the lower mold 2, and the lower mold 2 has a space for the ejection plate 311 to move, so that the ejection plate 311 can slide along the internal space of the lower mold 2, and when it slides to the ejection outlet 22, it can cover the ejection outlet 22. When the external driving device extends into the ejection outlet 22, it can push the ejection plate 311 to rise and fall along the lower mold 2.

[0060] Several first ejector posts 312 are provided, all installed on the ejector plate 311, with the other end passing through the guide port 2141 and connected to the first molded part 13. The first elastic part 314 is wrapped around the first ejector post 312, with one end connected to the positioning seat 214 and the other end connected to the ejector plate 311. When the ejector plate 311 rises, it will drive the first ejector post 312 to rise, thereby pushing the first molded part 13 towards the casting part 12 along the guide port 2141. The second molded part 21 remains stationary, thus enabling the first elastic part 314 to be squeezed synchronously. The first elastic part 314 can be a spring. The function of the first elastic part 314 is to reset the ejector plate 311. When the driving device disengages from the top outlet 22, the elastic force generated by the first elastic part 314 pushes the ejector plate 311 towards the top outlet 22, thereby resetting the ejector plate 311 and the first ejector post 312, and indirectly resetting the first molded part 13.

[0061] One end of the second ejector post 313 is connected to the casting part 12, and the other end extends through the first molding part 13 and the second molding part 21 to the lower mold 2, and is spaced at a preset distance from the ejector plate 311. The second ejector post 313 is not connected to the ejector plate 311, and is spaced at a preset distance. The specific distance needs to be determined according to the actual mold size, and is not limited here.

[0062] When the ejector plate 311 drives the first ejector column 312 to rise, the first ejector column 312 pushes the first molded part 13, thereby loosening and demolding the molded product. When the ejector plate 311 moves to the second ejector column 313, it drives the second ejector column 313 to rise, thereby ejecting the casting part 12 to open one side of the S-shaped cavity 111 of the first molded part 13, so as to facilitate the removal of the molded product from the S-shaped cavity 111.

[0063] The second elastic part 315 is wrapped around the second ejector post 313, with one end connected to the casting part 12 and the other end connected to the first molding part 13, so that the second elastic part 315 can apply elastic force to the casting part 12. Its main function is to reset the casting part 12. After losing the ejection function of the ejector plate 311, the casting part 12 is reset by the elastic force of the second elastic part 315.

[0064] Specifically, the ejector plate 311 is driven by a device that extends into the top outlet 22 and pushes the top outlet 22 toward the casting part 12, causing the first ejector column 312 to move the first molded part 13 toward the casting part 12, thereby separating the first molded part 13 from the second molded part 21. In conjunction with the pneumatic structure 32, the molded product is removed from the molding cavity 11. Subsequently, the ejector plate 311 moves a preset distance and pushes the second ejector column 313, causing the second ejector column 313 to push open the casting part 12, so as to remove the product, thereby achieving the function of convenient demolding and material removal.

[0065] The upper mold 1 and the lower mold 2 are provided with a locking structure. When ejection is not required, the locking structure is fixed and locked to prevent the upper mold 1 and the lower mold 2 from loosening during injection molding. When ejection is required, the locking structure is opened to allow the ejection operation to be performed.

[0066] Furthermore, the ejection structure 31 also includes an ejection part 316. One end of the ejection part 316 is connected to the ejection plate 311, and the other end passes through the second molding part 21 and is inserted into the stabilizing seat 213. The ejection part 316 includes a fixed post and an ejection cylinder. The fixed post is fixedly connected to the lower mold 2, and the ejection cylinder is inserted into the fixed post, so that the ejection cylinder can only move along the fixed post. At the same time, the fixed post can improve the ejection rigidity of the ejection cylinder and prevent bending. The ejection cylinder is connected to the ejection plate 311. When the ejection plate 311 rises, it can drive the ejection cylinder to move towards the casting part 12.

[0067] When pushed by the ejector plate 311, the ejector part 316 can penetrate the stabilizing seat 213 and move towards the molded product. After contacting the product, it pushes the product towards the casting part 12, and simultaneously cooperates with the first ejector column 312 to separate the first molding part 13 and the second molding part 21 to separate the product.

[0068] The ejector portion 316 is longer than the first ejector post 312, so that the ejector portion 316 will contact the product first, thereby loosening the product first. Simultaneously, the pneumatic structure 32 provides airflow to blow away the sticky parts. The first ejector post 312 then separates the first molded part 13 from the second molded part 21, thereby further ensuring that the molded product can be stably demolded.

[0069] In some embodiments, the pneumatic assembly includes a pneumatic pump 321, a delivery pipe 322, and a pneumatic pipe 323. The pneumatic structure 32 is mainly mounted on the second molding part 21. Therefore, if the second molding part 21 remains stationary, the pneumatic structure 32 is unaffected. The pneumatic pipe 323 is located in and communicates with the ventilation cavity 2121. The delivery pipe 322 is connected to the pneumatic pipe 323 and extends outward from the upper mold 1. The pneumatic pump 321 is connected to one end of the delivery pipe 322 located outside the upper mold 1. The pneumatic pump 321 provides airflow delivery and air pressure regulation.

[0070] Specifically, the pneumatic pump 321 provides the airflow and sufficient air pressure required for pneumatic operation, which is delivered to the pneumatic tube 323 through the delivery pipe 322. The pneumatic tube 323 is connected to each ventilation chamber 2121 and delivers the airflow to the connecting chamber 112. This causes the product in the connecting chamber 112 to be affected by the airflow and air pressure, separating it from the parts that are stuck or attached to the connecting chamber 112. After separation, the airflow is blown by the connecting chamber 112 to the S-shaped cavity 111, which then separates the parts that are stuck or attached to the S-shaped cavity 111. At the same time, the airflow can also cool the product to improve the efficiency of curing and molding.

[0071] In some embodiments, the second molding part 21 further includes a cooling seat 215, which is connected to a stabilizing seat 213. The cooling seat 215 is provided with a plurality of cooling pipes 324, which are connected to a conveying pipe 322 or a pneumatic pipe 323. The product is conveyed to the cooling pipes 324 through the conveying pipe 322 or the pneumatic pipe 323. The cooling seat 215 exchanges heat with the product molded in the communicating cavity 112. With the airflow conveyed by the pneumatic pipe 323, the product can be cooled quickly, improving material handling efficiency. At the same time, due to thermal expansion and contraction, the product will shrink slightly in volume as it gradually cools down, which increases the gap between the product and the inner wall of the molding cavity 11, allowing the airflow to flow more quickly and stably. This not only provides a cooling effect but also allows the airflow to more stably separate the product from the adhesive or attachment points of the inner wall of the molding cavity 11.

[0072] In this case, the first molded part 13 does not have a cooling pipe 324, but the first molded part 13 and the second molded part 21 are in close contact with each other, and heat will be conducted to the second molded part 21. Therefore, the cooling seat 215 of the second molded part 21 can simultaneously provide cooling to the first molded part 13.

[0073] Furthermore, several cooling pipes 324 are simultaneously embedded in the positioning seat 214. The positioning seat 214 will be subject to heat transfer, increasing the heat dissipation area. Therefore, the arrangement of several cooling pipes 324 in the positioning seat 214 can also cool the positioning seat 214 through the cooling pipes 324 when it is subject to heat transfer, so as to quickly cool the positioning seat 214 and further improve the overall cooling effect.

[0074] In some embodiments, both the cooling seat 215 and the positioning seat 214 are provided with a pushing cavity 2151, and the two pushing cavities 2151 are interconnected; a pushing structure 23 is provided in the pushing cavity 2151, and the pushing structure 23 is connected to the ejector part 316; a connecting sleeve 113 is also provided in the cooling seat 215, the connecting sleeve 113 is located in the connecting cavity 112, and the inner cavity of the connecting sleeve 113 is connected to the S-shaped cavity 111. After the injection molding material fills the S-shaped cavity 111, the inner cavity of the connecting sleeve 113 replaces part of the connecting cavity 112 on the second molded part 21 to fill the injection molding material; the pushing structure 23 abuts against the connecting sleeve 113.

[0075] When the ejector 316 needs to eject the product, it will drive the pusher structure 23 to move along the pusher cavity 2151. During the movement, the pusher structure 23 contacts the connecting sleeve 113 and pushes the connecting sleeve 113, causing the connecting sleeve 113 to rotate slightly, thereby fixing the position of the product inside the connecting sleeve 113. The slight rotation of the connecting sleeve 113 will loosen the connection between the connecting sleeve 113 and the product, thereby further providing a stable demolding effect.

[0076] Furthermore, the connecting cavity 112 is connected to the pushing cavity 2151. The pushing structure 23 includes a pushing frame 231, a rack 232, and a positioning frame 233. The pushing frame 231 is located in the pushing cavity 2151 and is connected to any ejection part 316 near the outer wall of the lower mold 2. The number of positioning frames 233 is provided, and they are all embedded in the pushing cavity 2151. The rack 232 is located in the pushing cavity 2151 and is slidably connected to the positioning frame 233 through a through-hole manner.

[0077] Two opposing first wedge blocks 2321 are provided at one end of the rack 232 near the pusher frame 231, and two second wedge blocks 2311 are provided at one end of the pusher frame 231 near the rack 232, with the two first wedge blocks 2321 located between the two second wedge blocks 2311; the connecting sleeve 113 has teeth at the position where the connecting cavity 112 communicates with the pusher cavity 2151, and the connecting sleeve 113 engages with the rack 232 through the teeth. Since the figure is a cross-sectional view, the teeth are not shown.

[0078] When the ejector 316 moves with the ejector plate 311, it synchronously drives the pusher frame to move. The pusher frame moves along the pusher cavity 2151, and during the movement, it drives the two second wedge blocks 2311 to move. The second wedge block 2311 near the lower mold 2 moves to the first wedge block 2321 near the lower mold 2. The rack 232 will be pushed away from the pusher frame 231 by the first wedge block 2321. During the movement of the rack 232, it engages with the teeth of the connecting sleeve 113, causing the connecting sleeve 113 to rotate along the connecting cavity 112, thereby separating the product inside the connecting sleeve 113 from the adhesive part of the connecting sleeve 113.

[0079] When the ejector 316 moves toward the ejector outlet 22 along with the ejector plate 311, the second wedge block 2311 near the casting part 12 moves to the first wedge block 2321 near the casting part 12. The rack 232 will be pushed by the first wedge block 2321 and move toward the pusher 231. The connecting sleeve 113 rotates along the connecting cavity 112, and the pusher 231 resets synchronously.

[0080] There is a gap between the first wedge block 2321 and the second wedge block 2311. Therefore, the ejector part 316 needs to move a preset gap before the second wedge block 2311 can contact the first wedge block 2321. This makes the actual degree to which the ejector part 316 drives the pusher 231 to push the rack 232 less, so that the rotation range of the connecting sleeve 113 is not large. Only a slight rotation of the connecting sleeve 113 is needed to loosen the product inside and allow it to be ejected in conjunction with the pneumatic structure 32 and the ejector part 316. This can prevent the product from being damaged by excessive torque due to excessive rotation range of the connecting sleeve 113.

[0081] Specifically, by utilizing the push structure 23 in conjunction with the ejector 316, the push frame 231 drives the connecting sleeve 113 to rotate slightly via the rack 232, thereby loosening the product formed inside the connecting sleeve 113 and allowing the airflow generated by the pneumatic structure 32 to be transported stably, further improving the stability of the separation between the product and the connecting sleeve 113.

[0082] According to the above embodiments, the mold demolding sequence of this application is as follows: the locking structure of the upper mold 1 and the lower mold 2 is opened, the pneumatic structure 32 is started to deliver airflow simultaneously, and the airflow enters the cooling pipe 324 for heat exchange to cool the formed product. The drive end of the external drive device is extended into the top outlet 22 and the ejector plate 311 is pushed toward the casting part 12. The ejector part 316 contacts the formed product along the ventilation cavity 2121 and pushes the pusher frame 231. The airflow enters the connecting sleeve 113. The pusher frame 231 drives the rack 232 to move through the second wedge block 2311 and the first wedge block 2321, and simultaneously drives the connecting sleeve 113 to rotate slightly, thereby loosening the connection point between the connecting sleeve 113 and the product. With the airflow and the ejector part 316 ejecting the connecting sleeve 113 and the S-shaped cavity 111, the second ejector column 313 pushes the casting part 12 open to open the first molded part 13, making it easier to collect the product.

[0083] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A waist-shaped molding die, comprising an upper die (1) and a lower die (2); the upper die (1) has a molding cavity (11) and a casting element (12) at the top, the casting element (12) extending into the molding cavity (11); the lower die (2) has an ejector assembly (3) connected to the upper die (1); the molding cavity (11) is divided into an S-shaped cavity (111) and several connecting cavities (112), the connecting cavities (112) communicating with the S-shaped cavity (111), and the S-shaped cavity (111) extending away from the casting element (12), characterized in that, The upper mold (1) further includes a first molding part (13), which is slidably connected to the casting part (12); the S-shaped cavity (111) is opened in the first molding part (13), and a part of the connecting cavity (112) is located in the first molding part (13); the lower mold (2) further includes a second molding part (21); the second molding part (21) is provided with another part of the connecting cavity (112), and when the first molding part (13) and the second molding part (21) are connected, the connecting cavity (112) is complete; the ejection assembly (3) includes an ejection structure (31) and a pneumatic structure (32); the ejection structure (31) penetrates the lower mold (2) and the second molding part (13). The first molded part (21) is connected to the first molded part (13), and injection molding material is poured into the molding cavity (11); the second molded part (21) includes a vent seat (212), a stabilizing seat (213), and a positioning seat (214); the positioning seat (214) has a plurality of guide ports (2141), and the ejection structure (31) is slidably connected to the guide ports (2141); the vent seat (212) is installed on the positioning seat (214), and the vent seat (212) has a vent cavity (2121), and the vent cavity (2121) is connected to the pneumatic structure (32); the stabilizing seat (213) is connected to the vent seat (212), and part of the connecting cavity (112) is located in the cavity. The stabilizing seat (213) is located on the ejector structure, which also includes an ejector plate (311) and an ejector part (316). The ejector plate (311) is located inside the lower mold (2) and is slidably connected to the lower mold (2). One end of the ejector part (316) is connected to the ejector plate (311), and the other end passes through the positioning seat (214) and is inserted into the stabilizing seat (213). The second molding part (21) also includes a cooling seat (215), which is connected to the stabilizing seat (213). The cooling seat (215) is provided with a plurality of cooling pipes (324), which are connected to a delivery pump. Pushing mechanisms are provided in both the cooling seat (215) and the positioning seat (214). The cavity (2151) is interconnected with the two push cavities (2151); the push cavity (2151) is provided with a push structure (23), which is connected to the ejector (316); the cooling seat (215) is also provided with a connecting sleeve (113), which is located in the connecting cavity (112), and the inner cavity of the connecting sleeve (113) is connected to the S-shaped cavity (111). After the injection molding material fills the S-shaped cavity (111), the inner cavity of the connecting sleeve (113) replaces part of the connecting cavity (112) on the second molded part (21) to fill the injection molding material; the push structure (23) abuts against the connecting sleeve (113);The ejector (316) drives the pushing structure (23) to move along the pushing cavity (2151). During the movement, the pushing structure (23) contacts the connecting sleeve (113) and pushes the connecting sleeve (113), causing the connecting sleeve (113) to rotate slightly. The product position inside the connecting sleeve (113) is fixed. The slight rotation of the connecting sleeve (113) will loosen the connection between the connecting sleeve (113) and the product.

2. The waist-shaped structure forming mold according to claim 1, characterized in that, The ejection structure (31) includes a first ejection post (312), a second ejection post (313), a first elastic part (314), and a second elastic part (315); the lower mold (2) has an ejection outlet (22), and an external driving device is inserted into the ejection outlet (22); the ejection plate (311) covers the ejection outlet (22); the first ejection post (312) is provided in several parts, all of which are installed on the ejection plate (311), and the other end passes through the guide opening (2141) and is connected to the first molded part (13); the first elastic part (314) is wound around the guide opening (2141). The first ejector post (312) is connected at one end to the positioning seat (214) and at the other end to the ejector plate (311); the second ejector post (313) is connected at one end to the casting part (12) and at the other end extends through the first molding part (13) and the second molding part (21) toward the lower mold (2) and is spaced at a preset distance from the ejector plate (311); the second elastic part (315) is wrapped around the second ejector post (313), and at one end is connected to the casting part (12) and at the other end is connected to the second molding part (21).

3. The waist-shaped structure forming mold according to claim 1, characterized in that, The pneumatic structure (32) includes a pneumatic pump (321), a delivery pipe (322), and a pneumatic pipe (323); the pneumatic pipe (323) is located inside the ventilation chamber (2121) and communicates with the ventilation chamber (2121); the delivery pipe (322) is connected to the pneumatic pipe (323) and extends outward from the upper mold (1); the pneumatic pump (321) is connected to one end of the delivery pipe (322) outside the upper mold (1), and the pneumatic pump (321) provides airflow delivery and air pressure regulation.

4. The waist-shaped structure forming mold according to claim 1, characterized in that, Several cooling pipes (324) are simultaneously embedded in the positioning seat (214).

5. The waist-shaped structure forming mold according to claim 1, characterized in that, The connecting cavity (112) communicates with the pushing cavity (2151). The pushing structure (23) includes a pushing frame (231), a rack (232), and a positioning frame (233). The pushing frame (231) is located inside the pushing cavity (2151) and is connected to any of the ejector portions (316) near the outer wall of the lower mold (2). Several positioning frames (233) are provided, and all of them are embedded in the pushing cavity (2151). The rack (232) is located inside the pushing cavity (2151) and slides through the positioning frame (233). Dynamic connection; the rack (232) is provided with two opposing first wedge blocks (2321) at one end near the pusher frame (231), and the pusher frame (231) is provided with two second wedge blocks (2311) at one end near the rack (232), and the two first wedge blocks (2321) are located between the two second wedge blocks (2311); the connecting sleeve (113) is provided with teeth at the connection between the connecting cavity (112) and the pusher cavity (2151), and the connecting sleeve (113) meshes with the rack (232) through the teeth.

6. The waist-shaped structure forming mold according to claim 5, characterized in that, There is a preset interval between the first wedge block (2321) and the second wedge block (2311).

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