Anti-smashing structure mounting and positioning mechanism for rubber boot forming

Abstract

The utility model discloses an anti-smashing structure installing and positioning mechanism for rubber boot forming, and relates to the technical field of rubber boot production, the anti-smashing structure installing and positioning mechanism comprises a steel protection installing mechanism, the steel protection installing mechanism comprises a first connecting frame, second connecting frames are symmetrically arranged at one end of the first connecting frame, and the other ends of the two second connecting frames are connected with bearing frames; a clamping seat is arranged between the two groups of bearing frames; the steel protector is directly integrated on the vamp part of the rubber boot through the steel protector mounting mechanism when the boot body of the rubber boot is subjected to injection molding, so that the steel protector and the vamp of the rubber boot can be subjected to integrated injection molding, secondary assembly is not needed, and the steel protector is prevented from shifting or falling off from the rubber boot.

Description

Technical Field

[0001] This utility model relates to the field of rubber boot manufacturing technology, specifically to an anti-impact structure installation and positioning mechanism for rubber boot molding. Background Technology

[0002] Traditional rubber boots, as a typical type of protective boot, are usually made on a simple production line. Workers manually glue the various parts of the boot, such as the rubber sheets, lining, and sole, onto the boot last, and then the boot is vulcanized in a vulcanizing tank to form the final product.

[0003] However, with the improvement of industrial safety standards and the increase in consumer demand for protective performance, the structural design and manufacturing process of traditional rubber boots have gradually revealed the following defects: Traditional rubber boots are usually made of pure rubber or composite materials in one piece. Although they can meet basic waterproof and anti-slip requirements, they still pose significant safety hazards in high-risk work scenarios. For example, in special scenarios such as construction sites, mining, or fire fighting, workers may face risks such as falling heavy objects, punctures from sharp objects, or crushing impacts. Pure rubber boots, due to insufficient material hardness, are unable to effectively resist external impacts or penetration by sharp objects, which can easily lead to foot injuries.

[0004] Although the industry has gradually introduced integrated injection molding molds for rubber boots, solving the efficiency and quality defects of traditional manual production, existing molds can only form the basic structure of the rubber boot and cannot directly integrate protective components such as the steel upper. In traditional processes, the steel upper needs to be fixed to the boot surface through secondary assembly (such as gluing or riveting), resulting in low production efficiency. Moreover, the assembly accuracy is greatly affected by the operator's skill level, and problems such as displacement or detachment of the steel upper are prone to occur, further weakening the product's protective reliability. Utility Model Content

[0005] The purpose of this utility model is to provide an anti-impact structure installation and positioning mechanism for rubber boot molding, which solves the technical problem that existing molds can only realize the molding of the basic structure of rubber boots and cannot directly integrate protective components such as the boot upper steel body.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A positioning mechanism for installing an anti-impact structure for molding rubber boots includes a steel guard installation mechanism. The steel guard installation mechanism includes a connecting frame one, with connecting frames two symmetrically arranged at one end of the connecting frame one, and a support frame connected to the other end of each of the two sets of connecting frames two.

[0008] A bracket is provided between the two sets of support frames.

[0009] As a further embodiment of this utility model: the card holder is symmetrically connected to connecting seats at both ends, and the top of the outer side of both sets of connecting seats is provided with connecting protrusions;

[0010] A support protrusion is provided at the bottom of the inner side of the support frame;

[0011] The two sets of supporting bosses are correspondingly provided with the two sets of connecting bosses.

[0012] As a further embodiment of this utility model: a connecting rod is provided on the supporting protrusion, and two sets of the connecting protrusions are sleeved on the corresponding connecting rods. An upper spring is provided at the upper end of the connecting rod, and a lower spring is provided at the lower end of the connecting rod.

[0013] The connecting boss is located between the upper spring and the lower spring.

[0014] As a further embodiment of this utility model: the connecting rod is fixedly connected to the supporting boss;

[0015] Alternatively, the connecting rod may be threadedly connected to the supporting boss.

[0016] As a further embodiment of this utility model: the connecting boss and the connecting rod are in clearance fit.

[0017] As a further embodiment of this utility model, the clearance of the single-sided fit of the clearance fit is greater than 1.5mm.

[0018] As a further embodiment of this utility model: the card holder is provided with a card cavity inside, the top surface of the card cavity is provided with an air groove, and the outer top surface of the card holder is provided with multiple sets of air connectors along the direction of the air groove, and the multiple sets of air connectors are all in communication with the air groove.

[0019] As a further embodiment of this invention: multiple sets of the gas connectors are connected to a vacuum pump via a gas extraction pipeline.

[0020] As a further embodiment of this utility model: multiple sets of the air connectors are connected to an air compressor through an air intake pipe.

[0021] As a further embodiment of this utility model: the two sets of connecting frames 2 are connected together and rotatably connected to the connecting frame 1;

[0022] A motor is installed on one side of the connecting frame;

[0023] The motor drives the connecting frame to deflect twice, adjusting the installation angle of the steel guard.

[0024] The beneficial effects of this utility model are:

[0025] 1. This utility model uses a drive steel guard installation mechanism to install the steel guard on the lower core mold. Then, through injection molding, the steel guard is integrally injection molded with the boot body and integrated into the upper position of the rubber boot, forming an integral boot body structure with the steel guard. Thus, no secondary assembly is required, and problems such as the steel guard shifting or falling off on the rubber boot are avoided.

[0026] 2. In the process of sleeve connection, since the boot surface of the lower core mold has a certain physiological curvature, a slight positional change in the vertical direction is required during the horizontal sleeve connection of the steel guard. The present invention is equipped with a connecting rod in conjunction with an upper spring and a lower spring, so that the card seat can make slight vertical adjustments along the connecting rod when the steel guard is sleeved and squeezed. The vertical movement squeezes the upper spring and the lower spring respectively. Through the elasticity limitation of the upper spring and the lower spring, the displacement and jamming phenomenon of the steel guard is avoided during sleeve connection.

[0027] 3. This utility model uses a vacuum pump not only to ensure the steel protector does not slip after being tilted, but also to stabilize the steel protector using adsorption force, reducing the tightness of the connection between the steel protector and the retaining seat after compression assembly, thus avoiding difficulties in material removal. Furthermore, to simplify the repositioning and detachment of the retaining seat from the steel protector, an air inlet pipe is connected to the air extraction pipe between the air connector and the vacuum pump. The other end of the air inlet pipe is connected to an air compressor. The air extraction pipe and the air inlet pipe are controlled by a control valve. When the retaining seat repositions and detaches from the steel protector, air is introduced into the air groove to reduce sliding friction and make detachment easier. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0030] Figure 2 This is a schematic diagram of the steel guard installation mechanism of this utility model in the state of steel guard installation;

[0031] Figure 3 This is a schematic diagram of the steel guard installation mechanism of this utility model. Figure 1 ;

[0032] Figure 4 This is a schematic diagram of the steel guard installation mechanism of this utility model. Figure 2 ;

[0033] Figure 5 This is a schematic diagram of the mating structure of the connecting rod, connecting boss, and supporting boss of this utility model;

[0034] Figure 6 yes Figure 5 Enlarged structural diagram of region A in the middle;

[0035] Figure 7 This is a schematic diagram of the cross-sectional structure of the card holder of this utility model;

[0036] Figure 8 This is a schematic diagram of the positioning boss structure of this utility model;

[0037] Figure 9 This is a schematic diagram of the position of the positioning boss in this utility model;

[0038] Figure 10 This is a schematic diagram of the positioning component structure of this utility model;

[0039] Figure 11 This is a schematic diagram of the structure between the positioning rod, positioning sleeve and moving rod of this utility model;

[0040] Figure 12 This is a schematic diagram of the positioning component of this utility model in the mold opening state.

[0041] In the diagram: 1. Outer mold; 2. Upper core mold; 21. Positioning groove; 3. Lower core mold; 31. Positioning part; 32. Mold closing surface; 4. Lower mold; 41. Positioning boss; 42. Limiting groove; 43. Movable spring; 44. Positioning sleeve; 45. Moving rod; 46. Positioning rod; 47. Sliding groove; 5. Driving component; 6. Upper template; 7. Bottom mold; 8. Steel guard installation mechanism; 81. Connecting frame one; 82. Connecting frame two; 83. Support frame; 84. Supporting boss; 85. Card seat; 851. Air groove; 86. Connecting seat; 87. Connecting boss; 88. Connecting rod; 89. Lower spring; 810. Upper spring; 811. Air connector; 9. Steel guard; 10. Puncture-resistant pad; 100. Boot body forming cavity; 200. Flow channel; 500. Air channel; 700. Boot sole forming cavity. Detailed Implementation

[0042] 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.

[0043] 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.

[0044] Example 1

[0045] like Figure 1 and Figure 2 As shown, this embodiment provides a rubber boot molding mold with an anti-smashing structure, including an outer mold 1, an upper core mold 2, a lower core mold 3, a lower mold 4, and a bottom mold 7;

[0046] The outer mold 1 has a cavity running vertically through it. The upper core mold 2 is located at the top of the cavity. The lower core mold 3 is movable vertically at the bottom of the cavity. The lower mold 4 is movable below the outer mold 1. The bottom mold 7 is movable vertically below the outer mold 1 and is located below the lower mold 4.

[0047] The outer mold 1, upper core mold 2, lower core mold 3 and lower mold 4 form a boot body forming cavity 100 for forming the boot body of the rubber boot, and the upper core mold 2 is provided with a flow channel 200 that connects to the boot body forming cavity 100 for injection molding.

[0048] Preferably, the outer mold 1 in this embodiment is an integral structure, so no parting line affecting the appearance will be formed on the boot body after molding; and even if a parting line is generated at the parting surface 32 between the upper core mold 2 and the lower core mold 3, since the parting line is located on the inside of the boot body, it will not affect the appearance. On the other hand, the inside of the rubber boot also needs to be lined, and the lining will cover the parting line, so it will not affect the comfort of wearing.

[0049] Preferably, this embodiment does not limit the specific installation method of the lower core mold 3, which can move up and down. The following is a specific installation method described: Figure 2 As shown, the rubber boot molding die with anti-smashing structure in this embodiment also includes a driving component 5 that can drive the lower core mold 3 to move up and down. The driving component 5 is disposed on the outer mold 1 or the upper core mold 2, and the bottom end of the driving component 5 is connected to the lower core mold 3. The driving component 5 is a prior art, such as a cylinder, oil cylinder, hydraulic cylinder, etc.

[0050] It should be further noted that, in order to prevent misalignment between the upper core mold 2 and the lower core mold 3 in the mold opening or closing state, this embodiment, for example... Figure 1 and Figure 2 As shown, a trapezoidal positioning groove 21 is provided at the lower end of the upper core mold 2, and a positioning part 31 adapted to the positioning groove 21 is provided on the mold closing surface 32 of the lower core mold 3. The lower core mold 3 is driven to close by the driving component 5, so that the positioning part 31 is inserted into the positioning groove 21 for mold closing and positioning, thereby correcting the offset error caused by the misalignment of the center of gravity of the lower core mold 3 with the upper core mold 2, and ensuring the quality of the boot body forming.

[0051] Preferably, in this embodiment, the mold-closing surface 32 is located at the narrowest part of the boot shaft, which makes the separation of the upper core mold 2 and the lower core mold 3 smoother and avoids undercutting, which would make it difficult to demold the molded rubber boot.

[0052] Preferably, the movable installation method of the lower mold 4 in this embodiment includes the movable installation of the lower mold 4 up and down and being driven to move to the outside of the outer mold 1. The movable installation method of the lower mold 4 up and down and being driven to move to the outside of the outer mold 1 is the prior art. For example, the opposite sides of the lower mold 4 are horizontally slidably connected to the guide rail, and the guide rail is equipped with a horizontal cylinder or horizontal hydraulic cylinder for driving the lower mold 4 to slide horizontally. The guide rail is connected to the support platform through a lifting cylinder or lifting hydraulic cylinder, and can be used with the guide column for lifting and sliding positioning. When the lifting cylinder or lifting hydraulic cylinder drives the guide rail to move up and down, the lower mold 4 can be driven to move up and down. When the lower mold 4 is driven to move horizontally through the horizontal cylinder or horizontal hydraulic cylinder, the lower mold 4 can be moved to the outside of the outer mold 1.

[0053] Preferably, a boot sole forming cavity 700 is formed between the bottom mold 7 and the lower mold 4 for forming the boot sole. By adding the raw material for forming the boot sole into the boot sole forming cavity 700, the raw material in the boot sole forming cavity 700 is formed into the boot sole due to the extrusion of the bottom mold 7 and the lower mold 4 after the mold is closed. Then, in conjunction with the boot body formed by injection molding in the boot body forming cavity 100, the boot body is vulcanized to form a rubber boot. This integrated rubber boot production improves production efficiency and production quality.

[0054] Preferably, the bottom mold 7 is installed in a way that allows it to move up and down, which is an existing technology. For example, the bottom mold 7 is driven to move up and down by a hydraulic cylinder, and the guide post slides up and down to limit its movement.

[0055] Preferably, this embodiment also includes an upper template 6, which is movable up and down on the top of the outer mold 1 and connected to the upper core mold 2. Before driving the lower core mold 3 to move away from the upper core mold 2, the upper template 6 is driven to open the upper core mold 2 upwards. Since the upper core mold 2 is used to form the upper part of the boot shaft, i.e., the upper core mold 2 has a structure that is wider at the top and narrower at the bottom, when the upper core mold 2 is opened, the gap between the outer side of the upper core mold 2 and the inner side of the outer mold 1 gradually increases. Therefore, when the lower core mold 3 is driven to move away from the upper core mold 2, the upper part of the boot shaft is easier to demold, and scratches on the outer side of the boot shaft can also be avoided.

[0056] It should be noted that the opening distance of the upper mold plate 6 is less than the thickness of the boot upper glue to avoid mold collision. The installation method of the upper mold plate 6 is existing technology, such as driving the upper mold plate 6 to move up and down through a hydraulic cylinder, and using guide pillars to slide up and down for limiting.

[0057] More preferably, in order to directly integrate the steel guard 9 onto the upper part of the rubber boot during the injection molding of the boot body, the steel guard 9 can be integrally injection molded with the upper part of the rubber boot without secondary assembly, and to avoid problems such as displacement or detachment of the steel guard 9 on the rubber boot.

[0058] The rubber boot molding die with anti-smashing structure in this embodiment also includes a steel guard installation mechanism 8, which is horizontally movable on one side of the outer mold 1 and is located on the side close to the toe of the rubber boot.

[0059] In this embodiment, during operation, the steel guard installation mechanism 8 is driven as follows: Figure 2 As shown, the steel guard 9 is installed on the lower core mold 3, and then injection molding is used to integrally mold the steel guard 9 with the boot body, integrating it into the upper position of the rubber boot to form an integral boot body structure with the steel guard 9.

[0060] Preferably, in this embodiment, the steel guard 9 can be directly sleeved on the outer surface of the lower core mold 3 for integrated injection molding. The lower surface of the steel guard 9 has no adhesive layer or only a small amount of rubber (formed by a small amount of raw material entering through the contact gap between the lower surface of the steel guard 9 and the outer surface of the lower core mold 3). The metal surface of the steel guard 9 is isolated by the subsequent inner lining.

[0061] Furthermore, in order to make the steel guard 9 more stable when integrated into the boot body, and to embed the steel guard 9 inside the rubber layer of the boot body, this embodiment can also provide a support rib (not shown in the figure) extending along the length direction of the rubber boot on the corresponding outer surface of the lower core mold 3, and fit the steel guard 9 onto the support rib; during one-piece injection molding, the molten raw material enters through the gap between adjacent support ribs, completes the coating of the steel guard 9, and embeds the steel guard 9 inside the rubber layer of the boot body, ensuring the stability of the steel guard 9 during use.

[0062] More preferably, such as Figures 3-7 As shown, the steel guard installation mechanism 8 in this embodiment includes a horizontally arranged connecting frame 1 81. Connecting frames 2 82 are symmetrically arranged at both ends of the connecting frame 1 81 near the lower core mold 3. Supporting frames 83 are connected to the other ends of both sets of connecting frames 2 82. A card seat 85 is arranged between the two supporting frames 83. Connecting seats 86 are symmetrically connected to both ends of the card seat 85. Connecting bosses 87 are provided at the top of the outer side of both connecting seats 86. Supporting bosses 84 are provided at the bottom of the inner side of the supporting frame 83. The two sets of supporting bosses 84 are correspondingly arranged with the two sets of connecting bosses 87.

[0063] The supporting boss 84 is provided with a connecting rod 88. Two connecting rods 88 are symmetrically arranged about the card seat 85. Two sets of connecting bosses 87 are sleeved on the corresponding connecting rods 88. An upper spring 810 is provided at the upper end of the connecting rod 88, and a lower spring 89 is provided at the lower end of the connecting rod 88. Both the upper spring 810 and the lower spring 89 are sleeved on the connecting rod 88. One end of the upper spring 810 abuts against the top surface of the connecting boss 87, and the other end abuts against the end of the connecting rod 88. One end of the lower spring 89 abuts against the bottom surface of the connecting boss 87, and the other end abuts against the top surface of the supporting boss 84.

[0064] It should be noted that in this embodiment, the connecting rod 88 can be fixedly mounted on the supporting boss 84, or it can be threadedly connected to the supporting boss 84. One way is to have a threaded hole on the supporting boss 84 and an external thread on the lower end of the connecting rod 88. The connecting rod 88 is then threadedly connected to the threaded hole on the supporting boss 84. By using a threaded connection, the support length of the connecting rod 88 can be adjusted, thereby adjusting the tightness of the upper spring 810 and the lower spring 89, and thus adjusting the elasticity of the card holder 85.

[0065] Furthermore, since the steel guard 9 needs to pass through the boot toe part of the lower core mold 3 during actual installation, the steel guard 9 needs to be installed with a downward tilt. In order to prevent the steel guard 9 from slipping out after being placed into the card holder 85, the card holder 85 in this embodiment is provided with a card cavity inside. An air groove 851 is provided on the top surface of the card cavity, and the air groove 851 is set along the arc of the card cavity inside the card holder 85. Both ends of the air groove 851 are closed ends. The corresponding outer top surface of the card holder 85 is provided with multiple sets of air connectors 811 along the direction of the air groove 851. All sets of air connectors 811 are connected to the air groove 851. The other end of the multiple sets of air connectors 811 is connected to an external vacuum pump to realize air extraction. By forming a negative pressure in the air groove 851, the steel guard 9 placed in the card cavity is adsorbed.

[0066] In this embodiment, the steel guard 9 is placed into the card holder 85. An external vacuum pump is used to draw air, creating a negative pressure in the air groove 851, which attracts the placed card holder 85. Then, the steel guard installation mechanism 8 is driven to move downward to the core mold 3, so that the steel guard 9 is fitted onto the lower core mold 3. After fitting, the vacuum pump is turned off, the steel guard 9 is released, and the steel guard installation mechanism 8 is reset.

[0067] During the fitting process, the boot surface of the lower core mold 3 has a certain physiological curvature (such as...). Figure 2 As shown), therefore, a slight positional change in the vertical direction is required during the horizontal sleeve connection of the steel guard 9. When the clamp 85 drives the steel guard 9 to be sleeved and squeezed, it can be slightly adjusted in the vertical direction along the connecting rod 88. The vertical movement squeezes the upper spring 810 and the lower spring 89 respectively. Through the elasticity limitation of the upper spring 810 and the lower spring 89, the displacement and jamming phenomenon of the steel guard 9 during sleeve connection is avoided.

[0068] Furthermore, as described above, a threaded connection can be used to control the tightness of the fit between the upper spring 810 and the lower spring 89, thereby making the connection process more stable and the range of vertical fluctuations more reasonable.

[0069] It should be noted that in this embodiment, the card cavity inside the card holder 85 fits against the outer side of the steel guard 9. The card holder 85 can be cast according to the shape of the steel guard 9, or it can be produced by other processing technology. No specific restrictions are made here.

[0070] It should also be noted that in this embodiment, the use of a vacuum pump on the steel guard 9 is not only to ensure that it does not slip after being tilted, but also to stabilize the steel guard 9 with adsorption force, reducing the tightness of the connection between the steel guard 9 and the card holder 85 after compression assembly, thus avoiding difficulties in material removal. Furthermore, to make it easier for the card holder 85 to reset and detach from the steel guard 9, an air inlet pipe is connected to the air extraction pipe between the air connector 811 and the vacuum pump. The other end of the air inlet pipe is connected to an air compressor. The air extraction pipe and the air inlet pipe are controlled by a control valve. When the card holder 85 resets and detaches from the steel guard 9, air is introduced into the air groove 851 to reduce sliding friction and make detachment easier.

[0071] Furthermore, such as Figure 5 and Figure 6 As shown, in this embodiment, the connecting boss 87 and the connecting rod 88 are in clearance fit, and the clearance H on one side of the fit is greater than 1.5mm. This allows the card holder 85 to deflect slightly during the steel guard 9 sleeve process, providing a flexible fit and avoiding damage to the mold or jamming during the rigid fit process.

[0072] It is understandable that the horizontally movable installation method of the steel guard installation mechanism 8 is an existing technology. For example, the horizontal movement of the steel guard installation mechanism 8 can be driven by a hydraulic cylinder, and corresponding guide rails can also be set for guidance.

[0073] Preferably, in this embodiment, the two sets of connecting frames 82 can also be rotated and installed on the connecting frame 81. The connecting frame 82 can be driven to deflect by a drive source such as a motor or a rotary cylinder, thereby adjusting the installation angle of the steel guard 9 to adapt to different installation conditions.

[0074] Example 2

[0075] like Figures 8-12 As shown, the difference between this embodiment and Embodiment 1 is that the lower mold 4 in this embodiment is also provided with a positioning structure of puncture-resistant pad 10. Since the sole of a traditional rubber boot is difficult to withstand the puncture of a sharp object, this embodiment adds puncture-resistant pad 10 to the sole to improve the puncture resistance of the rubber boot.

[0076] Since the lower mold 4 and the bottom mold 7 form the boot sole by extruding the raw material, the puncture-resistant pad 10 is directly added into the boot sole forming cavity 700 and will shift in position during the extrusion process, resulting in uneven puncture resistance of the formed boot sole.

[0077] In this embodiment, a positioning structure is provided on the lower molding surface of the lower mold 4 (the surface that matches the boot sole molding cavity 700) to install and position the puncture-resistant pad 10, so as to prevent the position of the puncture-resistant pad 10 from shifting due to the mutual compression of the raw materials in the boot sole molding cavity 700 during molding.

[0078] The puncture-resistant pad 10 has a positioning hole at the corresponding positioning structure position. The positioning hole cooperates with the positioning structure to position the puncture-resistant pad 10 on the positioning structure before the boot sole is formed.

[0079] like Figure 8 As shown, the positioning structure can be a positioning boss 41 disposed on the lower forming surface of the lower mold 4. Multiple sets of positioning bosses 41 can be provided, such as... Figure 9As shown, a set of puncture-resistant pads is provided at the toe, heel, and middle of the boot. Before the boot sole is formed, the puncture-resistant pads 10 are fitted onto the corresponding positioning bosses 41 through the positioning holes, thereby positioning the puncture-resistant pads 10 on the lower forming surface of the lower mold 4, so that the puncture-resistant pads 10 do not shift during the forming of the boot sole.

[0080] like Figures 10-12 As shown, another solution in this embodiment is: the positioning structure can also be a positioning component disposed on the lower forming surface of the lower mold 4. This positioning component includes multiple sets of limiting grooves 42 formed on the lower forming surface of the lower mold 4, which can be used as follows: Figure 9 As shown, three sets of limiting grooves 42 are provided. A movable spring 43 is provided in the limiting groove 42. A moving rod 45 is abutted at the end of the movable spring 43 away from the bottom of the limiting groove 42. A positioning sleeve 44 is inserted into the opening of the limiting groove 42 with an interference fit. The top of the positioning sleeve 44 abuts against the bottom surface of the moving rod 45. A positioning rod 46 is sleeved in the positioning sleeve 44. The positioning rod 46 is adapted to the limiting groove 42. The positioning rod 46 is threaded to the moving rod 45. A sliding groove 47 is opened on the side of the positioning rod 46 near the positioning sleeve 44, so that the positioning rod 46 can move up and down in the limiting groove 42.

[0081] It should be noted that the elastic force of the movable spring 43 is relatively large, which is greater than the pressing force of manually installing the puncture-resistant pad 10 (that is, when manually installing the puncture-resistant pad 10, the movable spring 43 does not contract under force), and the movement limit distance of the positioning rod 46 is less than the thickness of the puncture-resistant pad 10, that is, after the positioning rod 46 contracts under force, it still protrudes from the lower forming surface of the lower mold 4.

[0082] The working principle of this embodiment is as follows: During the mold opening of the lower mold 4 and the bottom mold 7, the puncture-resistant pad 10 is fitted onto the positioning rod 46 through the mounting hole. Then, raw material is added inside the boot sole forming cavity 700. The lower mold 4 and the bottom mold 7 are closed to extrude the raw material. The high pressure inside extrudes the positioning rod 46 into the limiting groove 42 and fills part of the mounting hole of the puncture-resistant pad 10, thereby forming a boot sole carrying the puncture-resistant pad 10.

[0083] During the mold opening process after molding, the positioning rod 46 is pushed downward by the spring force of the return spring 89 to complete the demolding of the boot sole, avoiding the boot sole from sticking to the lower mold 4. At the same time, since the contact area between the positioning rod 46 and the puncture-resistant pad 10 is small, the puncture-resistant pad 10 and the positioning rod 46 are more easily and conveniently connected, and the boot sole remains in the boot sole molding cavity 700.

[0084] It should be noted that the use of movable positioning components can restrict the position of the puncture-resistant pad 10 during positioning and installation, and reduce the contact area with the puncture-resistant pad 10 during demolding. This avoids generating demolding pull force on the puncture-resistant pad 10, thus avoiding affecting the bonding force between the puncture-resistant pad 10 and the boot sole (when the demolding pull force is too large, it is easy to cause a bonding gap between the already bonded puncture-resistant pad 10 and the boot sole), thereby improving product quality.

[0085] It is understandable that the length of the sliding groove 47 on the positioning rod 46 is equal to the length of the positioning sleeve 44 plus the limit distance of movement, and the positioning rod 46 can slide up and down in the positioning sleeve 44 through the sliding groove 47. The positioning rod 46 is threadedly connected to the moving rod 45, and a threaded hole is provided on the moving rod 45. The positioning rod 46 is provided with a threaded post. When it is necessary to disassemble the positioning assembly, the positioning rod 46 is unscrewed, and the positioning sleeve 44 is pulled out by connecting it with the moving rod 45 through a long bolt, thereby completing the overall disassembly.

[0086] Example 3

[0087] like Figures 8-10 As shown, the difference between this embodiment and Embodiment 1 or Embodiment 2 is that the same mold is used to form a pair of rubber boots, and the steel guard installation mechanism 8 is provided in two sets.

[0088] Example 4

[0089] like Figure 1 As shown, the difference between this embodiment and embodiment one, two or three is that this embodiment has an air channel 500 inside the upper core mold 2 and the lower core mold 3 for air to be introduced into the boot body. During demolding, gas can be injected through the air channel 500 to facilitate demolding of the rubber boot.

[0090] Example 5

[0091] This embodiment provides a molding process for rubber boots with an anti-impact structure, using the molding mold described in Embodiment 2, and includes the following steps:

[0092] Material feeding stage: A fixed amount of raw material is added to the boot sole forming cavity 700 area of ​​the bottom mold 7, and the puncture-resistant pad 10 is fitted onto the positioning structure of the lower forming surface of the bottom mold 4 through the mounting hole;

[0093] Insert the steel guard 9 into the steel guard installation mechanism 8, control the movement of the steel guard installation mechanism 8, and install the steel guard 9 on the lower core mold 3.

[0094] Mold closing stage: Control the lower mold 4 to move between the outer mold 1 and the bottom mold 7, and control the bottom mold 7, lower mold 4 and lower core mold 3 to move upward to complete the mold closing. The raw material and puncture-resistant pad 10 in the boot sole forming cavity 700 are extruded to form a boot sole containing the puncture-resistant pad 10.

[0095] Injection molding stage: The rubber material is injected through the runner 200, and the rubber material covers the steel guard 9 to form a boot body with the steel guard 9.

[0096] Vulcanization stage: First, drive the bottom mold 7 and the lower mold 4 downward. After the lower mold 4 separates from the outer mold 1 and the bottom mold 7 separates from the lower mold 4, drive the lower mold 4 to move to the outside of the outer mold 1, and then drive the bottom mold 7 upward to join the outer mold 1, so that the boot body and the boot sole vulcanize to form a rubber boot.

[0097] Demolding stage: First drive the bottom mold 7 to move downward, then drive the lower core mold 3 to move downward, and the rubber boot with steel guard 9 and puncture-resistant pad 10 can be taken out.

[0098] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A positioning mechanism for installing an anti-impact structure in rubber boot molding, characterized in that, The steel guard installation mechanism (8) includes a connecting frame one (81), and a connecting frame two (82) is symmetrically arranged at one end of the connecting frame one (81). The other end of the two sets of connecting frames two (82) is connected to a support frame (83). A bracket (85) is provided between the two sets of support frames (83).

2. The anti-impact structure installation and positioning mechanism for rubber boot molding according to claim 1, characterized in that, The card holder (85) is symmetrically connected to the two ends of the connecting seat (86), and the top of the outer side of the two sets of connecting seats (86) is provided with a connecting boss (87); The support bracket (83) has a support boss (84) at the bottom of its inner side; The two sets of supporting bosses (84) are correspondingly provided with the two sets of connecting bosses (87).

3. The anti-impact structure installation and positioning mechanism for rubber boot molding according to claim 2, characterized in that, The supporting boss (84) is provided with a connecting rod (88), and two sets of connecting bosses (87) are sleeved on the corresponding connecting rods (88). The upper end of the connecting rod (88) is provided with an upper spring (810), and the lower end of the connecting rod (88) is provided with a lower spring (89). The connecting boss (87) is located between the upper spring (810) and the lower spring (89).

4. The anti-impact structure installation and positioning mechanism for rubber boot molding according to claim 3, characterized in that, The connecting rod (88) is fixedly connected to the supporting boss (84); Alternatively, the connecting rod (88) may be threadedly connected to the supporting boss (84).

5. The anti-impact structure installation and positioning mechanism for rubber boot molding according to claim 4, characterized in that, The connecting boss (87) and the connecting rod (88) are in clearance fit.

6. The anti-impact structure installation and positioning mechanism for rubber boot molding according to claim 5, characterized in that, The clearance of the clearance fit on one side is greater than 1.5 mm.

7. The anti-impact structure installation and positioning mechanism for rubber boot molding according to claim 6, characterized in that, The card holder (85) has a card cavity inside, and an air groove (851) is provided on the top surface of the card cavity. Multiple sets of air connectors (811) are provided on the outer top surface of the card holder (85) along the direction of the air groove (851), and the multiple sets of air connectors (811) are all in communication with the air groove (851).

8. The anti-impact structure installation and positioning mechanism for rubber boot molding according to claim 7, characterized in that, Multiple sets of the aforementioned air connectors (811) are connected to a vacuum pump via air extraction lines.

9. A rubber boot molding anti-impact structure installation and positioning mechanism according to claim 7 or 8, characterized in that, Multiple sets of the aforementioned air connectors (811) are connected to an air compressor via an air intake pipe.

10. The anti-impact structure installation and positioning mechanism for rubber boot molding according to claim 1, characterized in that, The two sets of connecting frames two (82) are connected and rotatably connected to the connecting frame one (81); A motor is provided on one side of the connecting frame (81); The motor drives the second connecting frame (82) to deflect, adjusting the installation angle of the steel guard (9).

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