A sock loading mechanism for a rubber boot forming machine

Abstract

This application discloses a sock-feeding mechanism for rubber boot molding, relating to the field of rubber boot processing. It includes an upper mold base and a last body for attaching the sock. The last body is horizontally slidably connected to the lower end of the upper mold base. Positioning ribs are provided circumferentially on the upper part of the outer wall of the last body. The distance between the upper and lower sides of the positioning ribs gradually decreases in the direction away from the last body. The upper and lower sides of the positioning ribs are connected to their outer sides by arc transitions. During demolding, it can control the last body to slide to the outside of the mold, thereby facilitating the attachment of the sock onto the last body and improving the efficiency of the sock-attaching process.

Description

Technical Field

[0001] This application relates to the field of rubber boot processing technology, specifically to a sock feeding mechanism for rubber boot molding. Background Technology

[0002] Rubber boots are shoes with a slightly cylindrical upper that extends above the ankle. They typically consist of a boot body, a sole, and a lining. In certain specialized work environments, such as mining operations, additional protective measures are added to standard rubber boots. For instance, to prevent heavy impacts to the toes and instep in mining conditions, steel inserts and impact-resistant insteps can be built into the corresponding areas of the boots. The steel inserts primarily protect the toes from impacts, while the impact-resistant insteps protect the instep from impacts.

[0003] Traditional rubber boot production relies on labor-intensive production lines. On these simple lines, workers manually attach and position various components—including rubber sheets, linings, steel sleeves, anti-slip insoles, and soles—on a shoe last to form a boot. The boot is then vulcanized in a vulcanizing tank to create the final product. However, this traditional production method requires significant manpower and resources, resulting in low efficiency. Furthermore, varying worker skill levels lead to numerous product defects and poor consistency.

[0004] Therefore, how to improve traditional rubber boot production lines to overcome the above-mentioned shortcomings is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] One objective of this application is to provide a sock feeding mechanism for molding rubber boots, in order to solve the problems of low production efficiency, numerous product defects, and poor product consistency caused by the need for manual sock feeding in the prior art.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: a sock feeding mechanism for molding rubber boots, including an upper mold base and a last body for fitting socks, wherein the last body is horizontally slidably connected to the lower end of the upper mold base, and a positioning rib is provided on the upper part of the outer wall of the last body along the circumferential direction, wherein the distance between the upper and lower sides of the positioning rib gradually decreases in the direction away from the last body, and the upper and lower sides of the positioning rib and its outer side are connected by a circular arc transition.

[0007] Preferably, the lower surface of the upper mold base is provided with a sliding groove, and the upper end of the last body is provided with a slider, which is slidably connected to the sliding groove; the upper mold base is provided with a pushing member for pushing the slider to the end of the sliding groove; the stocking feeding mechanism further includes a transfer assembly, which is disposed between the upper mold base and the upright frame, and is used to clamp the slider and perform horizontal and vertical movements, and is provided with a pusher for pushing the slider into the sliding groove.

[0008] Preferably, the slide groove includes an upper rectangular groove, an inverted trapezoidal groove, and a lower rectangular groove connected sequentially from top to bottom; the slider includes an upper rectangular segment, an inverted trapezoidal segment, and a lower rectangular segment connected sequentially from top to bottom; the upper rectangular segment is slidably connected to the upper rectangular groove, the inverted trapezoidal segment is slidably connected to the inverted trapezoidal groove, and the lower rectangular segment is slidably connected to the lower rectangular groove; the gap D between the side surface of the upper rectangular segment and the inner side surface of the upper rectangular groove is greater than the gap d between the side surface of the lower rectangular segment and the side surface of the lower rectangular groove, and the height difference H between the upper end face of the upper rectangular segment and the inner top of the upper rectangular groove is greater than or equal to the height h of the lower rectangular segment.

[0009] Preferably, there are two last bodies and two sock tubes, and the two last bodies are fixed to the same slider symmetrically and at intervals.

[0010] Preferably, the instep of the last body is provided with a positioning part for engaging with the anti-smashing foot surface.

[0011] Preferably, the toe of the last body is provided with a positioning part for engaging the steel ladle.

[0012] Preferably, the last body is provided with anti-smashing foot surface, and the inner side of the anti-smashing foot surface near the steel ladle is provided with a relief groove for avoiding the positioning part and a locking groove for locking the steel ladle.

[0013] Preferably, the last body has an internal receiving cavity, the positioning part is slidably connected to the receiving cavity, and the positioning part can slide to be hidden inside the receiving cavity; the last body and the transfer assembly are provided with a driving mechanism for driving the positioning part to slide in and out of the receiving cavity.

[0014] Preferably, the driving mechanism includes an oil storage chamber slidably disposed on the upper surface of the slider and connected to the receiving cavity, a plunger slidably connected to the oil storage chamber, a cover plate connected to the upper end of the oil storage chamber, an opening extending through the cover plate, and a spring between the cover plate and the plunger; the transfer assembly is provided with a negative pressure pipe for movable docking opening; the upper mold base is provided with a telescopic ejector rod, which extends through the opening to press against the plunger when the last body is closed.

[0015] Preferably, the two adjacent surfaces of the positioning part are transitioned by rounded corners.

[0016] Compared with the prior art, the beneficial effects of this application are as follows: By horizontally sliding the last body to the lower end of the upper mold base, the last body can be controlled to slide to the outside of the mold during demolding, thus facilitating the fitting of the stocking onto the last body. Compared with operating directly in the mold-open state (i.e., the inside of the open mold), this method of fitting the stocking on the outside of the mold provides a larger operating space and is more convenient, thereby improving production efficiency. It also facilitates the automatic fitting of the stocking with the stocking installation component, thus improving the efficiency of stocking fitting, increasing product consistency, and reducing product defects. Attached Figure Description

[0017] Figure 1 A perspective view of a molding die for a rubber boot with a liner provided in this application.

[0018] Figure 2 Provided for this application Figure 1 Front view of the middle section of the structure.

[0019] Figure 3 Provided for this application Figure 1 Enlarged view of the middle part of the structure.

[0020] Figure 4 Provided for this application Figure 3 Front view of the middle section of the structure.

[0021] Figure 5 Provided for this application Figure 4 A magnified view of a section at point I.

[0022] Figure 6 Provided for this application Figure 3 Enlarged view of a portion of the structure of the middle mold body.

[0023] Figure 7 This is a structural schematic diagram of a steel ladle and its anti-impact foot surface provided for this application.

[0024] Figure 8 Provided for this application Figure 7 Another perspective view of the foot being hit by a metal object.

[0025] Figure 9 A cross-sectional view of another last body provided for this application.

[0026] Figure 10 Provided for this application Figure 9 A magnified view of section II in the middle.

[0027] Figure 11 Provided for this application Figure 10 A magnified view of section III in the middle.

[0028] Figure 12 Provided for this application Figure 11 Another state diagram of the various structures shows the position where the positioning part is hidden inside the receiving cavity.

[0029] Figure 13 A perspective view of a stocking mounting assembly provided in this application.

[0030] In the diagram: 1. Left mold; 11. Side template; 12. Upper locking seat; 13. Side locking plate; 2. Right mold; 3. Isolation mold; 4. Bottom mold; 41. Lower mold base; 5. Stocking feeding mechanism; 51. Upper mold base; 511. Slide groove; 52. Last body; 521. Positioning rib; 522. Slider; 523. Toe; 524. Positioning part; 525. Receiving cavity; 526. Oil storage cavity; 527. Plunger; 528. Cover plate; 5281. Opening; 529. Spring; 6. Stocking installation assembly; 61. Stand; 62. Stocking tube; 100. Steel ladle; 200. Anti-smashing foot; 201. Avoidance groove; 202. Snap-fit ​​groove. Detailed Implementation

[0031] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0032] In the description of this application, it should be noted that directional terms such as "center," "lateral," "longitudinal," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific scope of protection of this application. The terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. The terms "comprising" and "having," and any variations thereof, in the specification and claims of this application, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0033] Reference Figures 1 to 4One embodiment of this application provides a molding die for rubber boots with liner stockings, including a left mold 1, a right mold 2, a separation mold 3, a bottom mold 4, and a liner stocking feeding mechanism 5; the liner stocking feeding mechanism 5 includes an upper mold base 51 and a last body 52 for fitting the liner stocking. The last body 52 is horizontally slidably connected to the lower end of the upper mold base 51. The upper part of the outer wall of the last body 52 is provided with positioning ribs 521 along the circumferential direction. The distance between the upper and lower sides of the positioning ribs 521 gradually decreases in the direction away from the last body 52. ​​The upper and lower sides of the positioning ribs 521 and their outer sides are connected by arc transitions; the left mold 1 and the right mold 2 can be slidably disposed below the upper mold base 51. The left mold 1 The inner wall of the cavity of the right mold 2 is formed with positioning grooves for fitting the positioning ribs 521; the isolation mold 3 is horizontally and vertically slidably disposed below the upper mold base 51, and the isolation mold 3 is located below the left mold 1 and the right mold 2; the isolation mold 3, the left mold 1, the right mold 2 and the last body 52 are used to form the boot body and the boot insole, and the isolation mold 3 is provided with a glue inlet corresponding to the position of the boot insole; the bottom mold 4 is vertically slidably disposed below the upper mold base 51, and the bottom mold 4 is located below the isolation mold 3, and the bottom mold 4 and the isolation mold 3 are used to form the boot outsole; when the isolation mold 3 is removed and the bottom mold 4 is closed with the left mold 1 and the right mold 2, it is used to vulcanize and form the boot outsole and the boot insole.

[0034] Working principle: By setting the split structure of the left mold 1 and the right mold 2, the last body 52 can slide along the upper mold base 51 to the outside of the left mold 1 and the right mold 2, thus facilitating the fitting of the sock onto the last body 52. ​​During mold closing, when the last body 52 slides back between the left mold 1 and the right mold 2, the left mold 1 and the right mold 2 are driven to move towards each other, thereby completing the mold closing between the left mold 1, the right mold 2, and the last body 52; then, the isolation mold 3 first moves horizontally to directly below the last body 52, and then moves upward to complete the mold closing with the left mold 1 and the right mold 2; finally, the bottom mold 4 moves upward to complete the mold closing with the isolation mold 3 (before the bottom mold 4 moves upward, the raw material for forming the outsole of the boot needs to be added to the cavity on the bottom mold 4). During molding, molten rubber is injected between the isolation mold 3 and the last body 52 through the inlet on the isolation mold 3. After cooling, the boot body and insole are formed between the isolation mold 3, left mold 1, right mold 2 and the last body 52. ​​In addition, after the bottom mold 4 and the isolation mold 3 are closed, the raw material in the cavity of the bottom mold 4 will form the boot outsole due to the extrusion action. At this time, the bottom mold 4 is controlled to move downward to complete the demolding between it and the isolation mold 3. The isolation mold 3 moves downward again to complete the demolding between it and the left mold 1, right mold 2 and the last body 52. ​​Then, the isolation mold 3 is controlled to slide horizontally to the outside of the bottom mold 4. At this time, the bottom mold 4 moves upward again to complete the mold closing between it and the left mold 1, right mold 2 and the last body 52. ​​The boot outsole and the boot insole are vulcanized and formed through the vulcanization process. Finally, the bottom mold 4, left mold 1 and right mold 2 are reopened to remove the finished rubber boot. When the last body 52 slides to the outside of the left mold 1 and the right mold 2, it is also convenient to take out the finished rubber boots.

[0035] Reference Figure 3 During the process of the left mold 1 and right mold 2 sliding towards each other to complete the mold closing process with the last body 52, the positioning ribs 521 on the outer periphery of the last body 52 can achieve positioning engagement with the positioning grooves in the cavities of the left mold 1 and right mold 2, ensuring a high-precision fit between the left mold 1, right mold 2, and last body 52. ​​Specifically, since the position corresponding to the positioning rib 521 on the last body 52 is an elliptical structure (in top view), the dimensions of the annular positioning rib 521 in the front-back direction first increase and then decrease from left to right. Therefore, during the process of the left mold 1 and right mold 2 moving towards each other, the positioning grooves will push the positioning rib 521 to adjust its position in the horizontal direction, ultimately ensuring that the positioning rib 521 maintains a precise fit in the left-right and front-back directions. (Refer to...) Figure 4 As the distance between the upper and lower sides of the positioning rib 521 gradually decreases in the direction away from the last body 52, during the process of the left mold 1 and the right mold 2 moving towards each other, the positioning groove will also achieve a pressing fit with the upper and lower sides (i.e., the inclined plane) of the positioning rib 521, thereby adjusting the upper and lower position of the last body 52 and ensuring that the last body 52 achieves precise fit in the upper and lower directions.

[0036] It should be noted that since the stocking is directly fitted onto the last body 52, meaning there is no fixed structure between the stocking and the last body 52, this application sets the glue inlet on the isolation mold 3 at the position corresponding to the last body 52. ​​Specifically, the glue inlet corresponds to the outer bottom of the last body 52 with the stocking on it. This allows the injected high-pressure glue to flow gradually upwards from the outer bottom of the stocking, thus preventing wrinkles caused by the flow pressure of the glue. For example, if the glue is injected from the side or top of the left mold 1 or right mold 2, the flow pressure of the glue will push the stocking downwards, causing wrinkles and ultimately affecting the flatness of the stocking during molding.

[0037] It should be noted that the sliding installation methods of the left mold 1, right mold 2, isolation mold 3, and bottom mold 4 are all existing technologies in this field and will not be described in detail here. Furthermore, to achieve locking of the mold in the closed state, taking one side of the left mold 1 as an example: the left side of the left mold 1 is connected to the side template 11, that is, the side template 11 slides synchronously with the left mold 1, and a side locking plate 13 is slidably connected between the side template 11 and the left mold 1; an upper locking seat 12 slides vertically on the left side of the upper mold base 51; after the left mold 1 and right mold 2 are closed, the upper locking seat 12 slides downwards, and the inverted trapezoidal block at the lower end of the upper locking seat 12 locks the inverted trapezoidal groove at the upper end of the side template 11; the bottom mold 4 is connected to the lower mold base 41 at the bottom, and the lower... The mold base 41 has sliding holes at both ends. When the bottom mold 4 moves upward, the sliding holes are used to fit onto the lower end of the side template 11 and lock the lower end of the side template 11. At the same time, the trapezoidal block at the upper end of the base 4 and the trapezoidal groove at the lower end of the isolation mold 3 will also lock together. During the upward movement of the isolation mold 3, the trapezoidal block at the upper end of the isolation mold 3 and the trapezoidal groove at the lower end of the side locking plate 13 will lock together. At the same time, the side locking plate 13 will also be pushed to slide upward, so that the inverted trapezoidal groove at the upper end of the side locking plate 13 and the inverted trapezoidal block at the lower end of the upper mold base 51 will lock together.

[0038] In some embodiments described in this application, reference is made to Figures 1 to 4 The difference from Embodiment 1 is that the lower surface of the upper mold base 51 is provided with a groove 511, and the upper end of the last body 52 is provided with a slider 522, which is slidably connected to the groove 511; the upper mold base 51 is provided with a pusher for pushing the slider 522 to the end of the groove 511. (Refer to...) Figure 13 The molding die for the rubber boot with liner stockings also includes a liner stocking mounting assembly 6; the liner stocking mounting assembly 6 includes a stand 61 and a stocking tube 62, the stocking tube 62 is vertically mounted on the stand 61, the size of the stocking tube 62 is larger than the last body 52, and the upper end of the stocking tube 62 is used to tension and fix the turned-up cuff of the liner stocking; the liner stocking feeding mechanism 5 also includes a transfer assembly, the transfer assembly is disposed between the upper mold base 51 and the stand 61, the transfer assembly is used to clamp the slider 522 and perform horizontal and vertical movements, and the transfer assembly is provided with a pusher for pushing the slider 522 into the groove 511.

[0039] It is understood that the transfer component, the pushing component, and the jacking component are all prior art and are not shown in the accompanying drawings. The transfer component can be, for example, a multi-degree-of-freedom industrial robot. Adjusting the gripper of the industrial robot to a gripping structure for grasping the slider 522 is also a conventional technique in this field, so it will not be described in detail here. The pushing component and the jacking component can be, for example, existing telescopic mechanisms such as hydraulic cylinders and pneumatic cylinders.

[0040] Furthermore, since the stockings in the prior art are elastic, temporary fixation of the stockings can be achieved simply by manually placing the stockings inside the stocking tube 62, holding the top of the stockings with both hands, and folding the top over the top of the stocking tube 62. Then, when the transfer component moves the slider 522 (i.e., the last body 52) directly above the stocking tube 62 and drives the slider 522 to move vertically downwards, the stockings can be properly fitted onto the last body 52.

[0041] It should be understood that during the process of fitting the stocking onto the last body 52, the friction between the stocking cuff and the stocking tube 62 should be greater than the squeezing force exerted by the last body 52 on the inside of the stocking. This is to prevent the stocking from failing to fit smoothly onto the last body 52 when it moves downwards. There are many ways to ensure that the friction between the stocking cuff and the stocking tube 62 is greater than the squeezing force exerted by the last body 52 on the inside of the stocking. For example, increasing the diameter of the stocking tube 62 will increase the friction between the stocking cuff and the stocking tube 62. Another example is increasing the length of the stocking cuff, i.e., the longer the stocking cuff is fitted onto the stocking tube 62, the greater the friction between the stocking cuff and the stocking tube 62. Alternatively, the stocking can be completely rolled up and fitted onto the stocking tube 62.

[0042] In other words, this application allows the pantyhose to be fitted onto the stocking tube simultaneously during the injection molding process. After the mold opens and the finished boots are removed, the transfer component can clamp the slider 522, move it above the stocking tube 62, and then move it downwards to complete the fitting and fixing between the pantyhose and the last body 52. ​​At this point, the last body 52 with the pantyhose fitted can be put into the next molding cycle, resulting in higher work efficiency. To further improve work efficiency, two sets of last bodies 52 can be used alternately. One set of last bodies 52 is clamped to the boot removal station after molding for boot removal, while the other set of last bodies 52 has already completed the pantyhose installation at the pantyhose installation station. At this point, the transfer component can directly clamp the last body 52 with the pantyhose installed and put it into the next molding cycle. The last body 52 after the boots are removed at the boot removal station is then transferred to the pantyhose installation station to complete the pantyhose installation.

[0043] It should be understood that because injection molds have very high precision requirements, it is also necessary to ensure a high sliding fit accuracy between the slider 522 and the groove 511 in the actual process. Otherwise, if the precision between the slider 522 and the groove 511 is insufficient, it is easy to cause a collision between the positioning rib 521 and the left mold 1 and the right mold 2, thereby damaging the mold. Even if a collision does not occur, it is easy to increase the relative displacement adjustment between the positioning rib 521 and the positioning groove, which will also increase the daily wear of the mold. Therefore, it is generally required that the slider 522 and the groove 511 have a high sliding fit accuracy. However, the high precision requirement for sliding fit increases the difficulty of processing. On the other hand, since the installation of the stocking requires the slider 522 to be moved out of the groove 511 by the transfer component, and the slider 522 needs to be reinstalled into the groove 511 after the stocking is installed, if the precision between the slider 522 and the groove 511 is very high, the alignment precision between the slider 522 and the groove 511 needs to be increased at the same time. Otherwise, the slider 522 may have difficulty or be unable to slide into the groove 511. Especially when an industrial robot is used to perform the operation, the requirements for the motion precision control of the industrial robot are very high, which is difficult to guarantee in actual process.

[0044] Reference Figures 3 to 5 To address the aforementioned precision matching issues, in some embodiments of this application, the slide groove 511 includes an upper rectangular groove, an inverted trapezoidal groove, and a lower rectangular groove connected sequentially from top to bottom; the slider 522 includes an upper rectangular segment, an inverted trapezoidal segment, and a lower rectangular segment connected sequentially from top to bottom; the upper rectangular segment is slidably connected to the upper rectangular groove, the inverted trapezoidal segment is slidably connected to the inverted trapezoidal groove, and the lower rectangular segment is slidably connected to the lower rectangular groove; the gap D between the side surface of the upper rectangular segment and the inner side surface of the upper rectangular groove is greater than the gap d between the side surface of the lower rectangular segment and the side surface of the lower rectangular groove, and the height difference H between the upper end face of the upper rectangular segment and the inner top of the upper rectangular groove is greater than or equal to the height h of the lower rectangular segment.

[0045] It should be understood that, since the gap D between the side of the upper rectangular segment and the inner side of the upper rectangular groove is greater than the gap d between the side of the lower rectangular segment and the side of the lower rectangular groove, the sliding fit accuracy between the lower rectangular segment and the lower rectangular groove is higher, while the sliding fit accuracy between the upper rectangular segment and the upper rectangular groove is lower. Furthermore, since the height difference H between the upper end face of the upper rectangular segment and the top of the upper rectangular groove is greater than or equal to the height h of the lower rectangular segment, during the process of loading the slider 522 into the slide groove 511 through the transfer component, the upper rectangular segment can slide in along the upper rectangular groove, while the lower rectangular segment remains above the lower rectangular groove. At this time, the gap D between the side of the upper rectangular segment and the inner side of the rectangular groove is larger, thereby reducing the difficulty for the slider 522 to enter the slide groove 511, which reduces the precision control requirements of the transfer component. After the slider 522 enters the slide groove 511 and the transfer component is controlled to release the slider 522, under the action of gravity, the slider 522 moves downward along the slide groove 511. The inverted trapezoidal groove and the inverted trapezoidal segment act as guides, allowing the lower rectangular segment to smoothly enter the lower rectangular groove, thus achieving a high-precision fit between the slider 522 and the slide groove 511. In other words, this application only needs to ensure a high-precision fit between the lower rectangular segment and the lower rectangular groove, without needing to ensure a high-precision fit between all contact surfaces of the entire slider 522 and the slide groove 511, thus reducing the processing difficulty. Simultaneously, when the slider 522 enters the slide groove 511, the relatively low-precision sliding fit between the upper rectangular segment and the upper rectangular groove further reduces the difficulty of the slider 522 entering the slide groove 511, effectively lowering the precision control requirements for the transfer assembly. The specific parameters of the gap D can be determined based on the precision of the selected transfer assembly (such as an industrial robot), ensuring that the gap D parameter is greater than the precision of the industrial robot; the specific data for the gap d can be confirmed based on the precision of the selected machine tool. Furthermore, the height difference H between the upper end face of the upper rectangular segment and the top of the upper rectangular groove facilitates the insertion of the clamping unit (such as the gripper of an industrial robot) into the slide groove 511 to clamp the slider 522. Of course, if the height difference H between the upper end face of the upper rectangular segment and the top of the upper rectangular groove is less than the size of the clamping unit, a clearance groove for the gripper to enter can be added to the top of the slide groove 511, or one end of the slider 522 can be pushed out of the slide groove 511 by a pusher.

[0046] In some embodiments of this application, in order to simultaneously achieve the positioning and installation of the ladle 100 on the last body 52, such as Figure 6 As shown, a positioning part 524 for engaging and positioning the steel ladle 100 can be used at the toe 523 position of the last body 52. ​​The steel ladle 100 is engaged and positioned by the positioning part 524, so that the steel ladle 100 can be fed at the same time as the sock is fed, and the steel ladle 100 is carried inside the molded rubber boot to prevent the wearer's toes from being injured by heavy objects.

[0047] This application does not limit the specific structure of the positioning part 524, for example it can be as follows: Figure 6 The L-shaped locking post and cylindrical support structure shown in the figure limit and support the steel ladle 100, while the cylindrical support provides support for the steel ladle 100, so that the steel ladle 100 is suspended in front of the toe 523. After injection molding, the rubber fills the gap between the steel ladle 100 and the toe 523, so that the steel ladle 100 is completely wrapped inside the rubber of the boot body and the insole.

[0048] Similarly, the anti-smashing foot 200 can also be positioned and installed by setting a positioning part 524 at the instep position of the last body 52. ​​The positioning part 524 at the instep position of the last body 52 only needs to be adapted to match the shape of the anti-smashing foot 200. That is, after the anti-smashing foot 200 is positioned at the positioning part 524 at the instep position of the last body 52, a gap is created between the anti-smashing foot 200 and the last body 52 for the adhesive to enter.

[0049] In order to simultaneously achieve the positioning and installation of the steel ladle 100 and the anti-smashing foot 200, such as Figures 6 to 7 As shown, the inner side of the anti-smashing foot 200 near the ladle 100 has a clearance groove 201 for avoiding the positioning part 524 and a locking groove 202 for locking the ladle 100. In other words, only the positioning part 524 for locking the ladle 100 needs to be provided at the toe 523 position of the last body 52. ​​The anti-smashing foot 200 is locked and positioned to the ladle 100 via the locking groove 202, thus eliminating the need to provide a positioning part 524 at the instep position of the last body 52, resulting in a simpler structure. A clearance groove 201 is also required on the anti-smashing foot 200 at the position corresponding to the positioning part 524 on the toe 523 to prevent interference with the positioning part 524.

[0050] In some embodiments of this application, in order to avoid the influence of the positioning part 524 during the process of putting the stockings down onto the last body 52, the surface of the positioning part 524 needs to be rounded off, that is, the two adjacent surfaces of the positioning part 524 are connected by rounded corners, so that the outer surface of the positioning part 524 is smoother, so as to prevent the positioning part 524 from scratching the stockings during the process of putting the stockings onto the last body 52.

[0051] In some embodiments of this application, in order to completely avoid the phenomenon of scratched stockings occurring during the process of making 52 sets of stockings for the last body, such as Figures 9 to 12As shown, the last body 52 has a receiving cavity 525 inside, and the positioning part 524 is slidably connected to the receiving cavity 525, and the positioning part 524 can slide to be hidden inside the receiving cavity 525; the positioning part 524 can be driven to slide in and out of the receiving cavity 525 by a driving mechanism. The driving mechanism preferably includes an oil storage cavity 526 disposed on the upper surface of the slider 522 and communicating with the receiving cavity 525. A plunger 527 is slidably connected up and down in the oil storage cavity 526, and a cover plate 528 is connected to the upper end of the oil storage cavity 526. The cover plate 528 has openings 5281 extending through it from top to bottom, and a spring 529 is provided between the cover plate 528 and the plunger 527; the transfer assembly is provided with a negative pressure pipe for moving and docking with the opening 5281; the upper mold base 51 is provided with a telescopic ejector rod. When the last body 52 is closed, the telescopic ejector rod extends through the opening 5281 to press against the plunger 527. During the insertion of the stocking tube 62 into the last body 52, a vacuum is created inside the opening 5281 through the negative pressure tube to counteract the forces of the spring 529 and the weight of the plunger 527. This causes the plunger 527 to slide upwards, allowing the positioning part 524 to slide into the receiving cavity 525 until it is hidden within the receiving groove. At this point, the positioning part 524 will not contact the stocking. After the stocking is fitted, the negative pressure tube is removed. Under the action of the spring 529 and the weight of the plunger 527, the plunger 527 slides downwards, causing the positioning part 524 to slide out of the receiving cavity 525 again, facilitating positioning and engagement with the ladle 100. After the last body 52 is closed with the left mold 1 and right mold 2, the telescopic ejector rod enters through the opening 5281, pressing against the plunger 527 to prevent the positioning part 524 from retracting into the receiving cavity 525 due to the pressure of the rubber material. Although the positioning part 524 creates a corresponding shaped pit on the inside of the molded boot, its impact on the finished rubber boot is negligible.

[0052] It is understandable that the negative pressure pipe on the transfer assembly, its position adjustment method, and the telescopic top rod are all existing technologies, and will not be described in detail here.

[0053] It should be noted that the above-mentioned sock feeding mechanism 5 can also be implemented independently to be used in conjunction with other mold structures; in addition, when sock feeding is not considered, the upper mold base 51, the last body 52 and the transfer components can also be combined with the feeding of the ladle 100 and / or the anti-smashing foot surface 200 to form a ladle and anti-smashing foot surface feeding mechanism.

[0054] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed application.

Claims

1. A sock feeding mechanism for molding rubber boots, characterized in that, It includes an upper mold base and a last body for fitting stockings. The last body is horizontally slidably connected to the lower end of the upper mold base. The upper part of the outer wall of the last body is provided with positioning ribs along the circumference. The distance between the upper and lower sides of the positioning ribs gradually decreases in the direction away from the last body. The upper and lower sides of the positioning ribs and their outer sides are connected by arc transitions.

2. The sock loading mechanism for forming a rubber boot according to claim 1, wherein The lower surface of the upper mold base is provided with a sliding groove, and the upper end of the last body is provided with a slider, which is slidably connected to the sliding groove; the upper mold base is provided with a pusher for pushing the slider to the end of the sliding groove; The sock feeding mechanism also includes a transfer component, which is disposed between the upper mold base and the upright frame. The transfer component is used to clamp the slider and perform horizontal and vertical movements. The transfer component is provided with a pusher for pushing the slider into the groove.

3. The sock feeding mechanism for rubber boot molding as described in claim 2, characterized in that, The slide groove includes an upper rectangular groove, an inverted trapezoidal groove, and a lower rectangular groove connected sequentially from top to bottom; the slider includes an upper rectangular segment, an inverted trapezoidal segment, and a lower rectangular segment connected sequentially from top to bottom; the upper rectangular segment is slidably connected to the upper rectangular groove, the inverted trapezoidal segment is slidably connected to the inverted trapezoidal groove, and the lower rectangular segment is slidably connected to the lower rectangular groove; the gap D between the side surface of the upper rectangular segment and the inner side surface of the upper rectangular groove is greater than the gap d between the side surface of the lower rectangular segment and the side surface of the lower rectangular groove, and the height difference H between the upper end face of the upper rectangular segment and the inner top of the upper rectangular groove is greater than or equal to the height h of the lower rectangular segment.

4. The sock feeding mechanism for rubber boot molding as described in claim 2, characterized in that, The number of last bodies is two, and the two last bodies are fixed to the same slider symmetrically and at intervals.

5. The sock loading mechanism for forming a rubber boot according to claim 2, wherein The instep of the last body is provided with a positioning part for locking onto the foot to prevent it from being crushed.

6. The sock loading mechanism for forming a rubber boot according to claim 2, wherein The toe of the last body is provided with a positioning part for securing the steel ladle.

7. The sock loading mechanism for forming a rubber boot according to claim 6, wherein The last body is equipped with anti-smashing feet. The inner side of the anti-smashing feet, near the end of the ladle, is provided with a clearance groove for avoiding the positioning part and a locking groove for locking the ladle.

8. The sock loading mechanism for forming a rubber boot according to any one of claims 5 to 7, wherein The last body has an internal receiving cavity, the positioning part is slidably connected to the receiving cavity, and the positioning part can slide to be hidden inside the receiving cavity; the last body and the transfer assembly are provided with a driving mechanism for driving the positioning part to slide in and out of the receiving cavity.

9. The sock loading mechanism for forming a rubber boot according to claim 8, wherein The driving mechanism includes an oil storage chamber slidably disposed on the upper surface of the slider and connected to the receiving cavity. A plunger is slidably connected to the oil storage chamber. A cover plate is connected to the upper end of the oil storage chamber. The cover plate has openings extending through it. A spring is provided between the cover plate and the plunger. The transfer assembly is provided with a negative pressure pipe for the movable docking opening; the upper mold base is provided with a telescopic ejector rod, which extends through the opening to abut the plunger when the mold body is closed.

10. The sock loading mechanism for forming a rubber boot according to claim 5 or 6, wherein The two adjacent surfaces of the positioning part are transitioned by rounded corners.

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