Rubber boot forming die with anti-smashing structure and forming process of rubber boot forming die

Abstract

The invention discloses a rubber boot forming die with an anti-smashing structure and a forming process thereof, and relates to the technical field of rubber boot production, the rubber boot forming die comprises an outer die, an upper core die, a lower core die, a lower die and a bottom die, and further comprises a steel protection mounting mechanism; a cavity is formed in the outer mold in an up-down penetrating mode, and the upper core mold is arranged on the inner top of the cavity. A boot body forming cavity is formed among the outer mold, the upper core mold, the lower core mold and the lower mold, and a boot sole forming cavity is formed between the bottom mold and the lower mold; the steel protector mounting mechanism is used for mounting a steel protector matched with the lower core mold on the lower core mold, and during injection molding, a boot body with the steel protector is integrally formed; the process comprises a feeding stage, a mold closing stage, an injection molding stage, a vulcanization stage and a demolding stage. By adopting the structure, the steel protector is directly integrated on the boot surface part of the rubber boot during integral injection molding of the rubber boot.

Description

Technical Field

[0001] The present invention relates to the technical field of rubber boot production, and particularly relates to a rubber boot forming mold with an anti-smashing structure and its forming process. Background Art

[0002] As a typical type of protective boots, traditional rubber boots are usually produced on a simple production line. Workers manually paste various materials such as rubber sheets, linings, and soles of the rubber boots on a boot last, and then vulcanize them in a vulcanizing tank to form the final product.

[0003] However, with the improvement of industrial safety standards and the growing demand of consumers for protective performance, the structural design and production process of traditional rubber boots have gradually revealed the following defects: Traditional rubber boots are usually integrally formed with pure rubber or composite materials. Although they can meet the basic requirements of waterproofing and anti-slip, there are still significant safety hazards in high-risk operation scenarios. For example, in special scenarios such as construction sites, mining operations, or fire extinguishing, operators may face risks such as heavy object falling, sharp object piercing, or extrusion impact. Due to the insufficient hardness of the pure rubber rubber boots, it is difficult to effectively resist external impact forces or the penetration of sharp objects, and it is extremely easy to cause foot injuries.

[0004] Although the industry has gradually introduced integral injection molding molds for rubber boots, which have solved the efficiency and quality defects of traditional manual production, the existing molds can only realize the forming of the basic structure of rubber boots and cannot directly integrate protective components such as steel guards on the boot surface. In the traditional process, the steel guard on the boot surface needs to be fixed on the boot surface of the rubber boot through secondary assembly (such as gluing or riveting), resulting in low production efficiency, and the assembly accuracy is greatly affected by the operator's skill level, and problems such as displacement or detachment of the steel guard on the boot surface are likely to occur, further weakening the protective reliability of the product.

[0005] In view of this, the industry urgently needs to develop a rubber boot forming mold with an anti-smashing structure and its forming process that can directly form the rubber boot, and realize the integral injection molding of the steel guard on the boot surface and the rubber boot surface. Summary of the Invention

[0006] The purpose of the present invention is to provide a rubber boot forming mold with an anti-smashing structure and its forming process, and solve the technical problem that the existing molds can only realize the forming of the basic structure of rubber boots and cannot directly integrate protective components such as steel guards on the boot surface.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] A rubber boot forming mold with an anti-smashing structure includes an outer mold, an upper core mold, a lower core mold, a lower mold, and a bottom mold, and further includes a steel guard installation mechanism;

[0009] A chamber is vertically penetrated inside the outer mold. The upper core mold is arranged at the inner top of the chamber. The lower core mold is arranged at the inner bottom of the chamber in a vertically movable manner. The lower mold is arranged on the lower side of the outer mold in a movable manner. The bottom mold is arranged on the lower side of the outer mold in a vertically movable manner, and the bottom mold is located below the lower mold.

[0010] A boot body forming cavity is formed among the outer mold, the upper core mold, the lower core mold and the lower mold. A boot sole forming cavity is formed between the bottom mold and the lower mold.

[0011] The steel guard installation mechanism installs the steel guard cooperating with the lower core mold on the lower core mold. During injection molding, a boot body with a steel guard is integrally formed.

[0012] As a further solution of the present invention: a positioning groove with a trapezoidal structure is formed at the lower end of the upper core mold, and the lower core mold is provided with a positioning part adapted to the positioning groove.

[0013] A driving part is arranged on the outer mold, and the bottom end of the driving part is connected to the lower core mold.

[0014] As a further solution of the present invention: the steel guard installation mechanism includes a connecting frame I. One end of the connecting frame I is symmetrically provided with connecting frames II. The other ends of the two groups of connecting frames II are both connected with a supporting bracket. A clamping seat is arranged between the two groups of supporting brackets.

[0015] As a further solution of the present invention: the two ends of the clamping seat are symmetrically connected with connecting seats, and connecting bosses are arranged at the top ends of the outer sides of the two groups of connecting seats.

[0016] Supporting bosses are arranged at the bottom ends of the inner sides of the supporting brackets.

[0017] The two groups of supporting bosses are arranged corresponding to the two groups of connecting bosses.

[0018] As a further solution of the present invention: a connecting rod is arranged on the supporting boss. The two groups of connecting bosses are sleeved on the corresponding connecting rods. An upper spring is arranged at the upper end of the connecting rod, and a lower spring is arranged at the lower end of the connecting rod.

[0019] The connecting boss is located between the upper spring and the lower spring.

[0020] As a further solution of the present invention: a clamping cavity is arranged inside the clamping seat. An air groove is formed on the top surface of the clamping cavity. A plurality of air connectors are arranged on the outer top surface of the clamping seat along the direction of the air groove, and the plurality of air connectors are all communicated with the air groove.

[0021] As a further solution of the present invention: the connecting boss and the connecting rod are in clearance fit, and the unilateral fit clearance H is greater than 1.5 mm.

[0022] As a further solution of the present invention: it further includes a positioning structure provided on the lower mold;

[0023] The positioning structure is used to prevent the puncture-resistant pad from shifting in position in the boot sole forming cavity.

[0024] As a further solution of the present invention: the positioning structure is a positioning boss;

[0025] Or, the positioning structure is a positioning component, and the positioning component includes a plurality of groups of limiting grooves opened on the lower forming surface of the lower mold. An active spring, a positioning sleeve, a moving rod, and a positioning rod are arranged in the limiting grooves;

[0026] The positioning sleeve is in interference fit with the notch of the limiting groove. The positioning rod is sleeved in the positioning sleeve. The moving rod is connected to the positioning rod, and the active spring abuts against the moving rod;

[0027] The positioning rod is adapted to the limiting groove, and a sliding groove is opened on one side of the positioning rod close to the positioning sleeve.

[0028] As a further solution of the present invention: a forming process for rubber boots with an anti-smashing structure, using the above-mentioned forming mold for rubber boots with an anti-smashing structure, includes the following steps:

[0029] Feeding stage: Add a quantitative raw material to the boot sole forming cavity area of the bottom mold, and sleeved the puncture-resistant pad on the positioning structure of the lower forming surface of the lower mold through the mounting hole;

[0030] Install the steel guard into the steel guard installation mechanism, control the movement of the steel guard installation mechanism, and install the steel guard on the lower core mold;

[0031] Mold closing stage: Control the lower mold to move between the outer mold and the bottom mold, and control the bottom mold, the lower mold, and the lower core mold to move upward to complete mold closing. The raw material and the puncture-resistant pad in the boot sole forming cavity are formed into a boot sole containing the puncture-resistant pad through extrusion;

[0032] Injection molding stage: Inject the rubber material through the runner, and the rubber material coats the steel guard to form a boot body with a steel guard;

[0033] Vulcanization stage: First drive the bottom mold and the lower mold to move downward. After the lower mold is separated from the outer mold and the bottom mold is separated from the lower mold, drive the lower mold to move to the outside of the outer mold, and then drive the bottom mold to move upward to be closed with the outer mold, so that the boot body and the boot sole are vulcanized to form rubber boots;

[0034] Demolding stage: First drive the bottom mold to move downward, and then drive the lower core mold to move downward, then the rubber boots with a steel guard and a puncture-resistant pad can be taken out.

[0035] The beneficial effects of the present invention:

[0036] 1. The present invention drives the steel guard installation mechanism to install the steel guard on the lower core mold, and then through injection molding, the steel guard and the boot body are integrally injection molded and integrated at the boot surface position of the rubber boot to form an integrated structure of the boot body with the steel guard.

[0037] 2. During the socketing process of the present invention, since the boot surface part of the lower core mold has a certain physiological curvature, there needs to be a slight vertical position change during the horizontal socketing of the steel guard. The present invention sets up a connecting rod in cooperation with an upper spring and a lower spring, so that when the clamping seat drives the steel guard during socketing extrusion, it can make a slight vertical adjustment along the connecting rod, and move up and down to respectively extrude the upper spring and the lower spring. Through the elastic force limitation of the upper spring and the lower spring, the phenomenon of displacement and jamming during the socketing of the steel guard is avoided.

[0038] 3. The present invention uses a vacuum pump for the steel guard not only to ensure that it does not slip off obliquely after being inserted, but also to stabilize the steel guard with the adsorption force, reduce the tightness of the clamping connection between the steel guard and the clamping seat after extrusion assembly, and avoid difficult material removal. Further, in order to make it easier for the clamping seat to reset and disengage from the steel guard, an intake pipeline is connected to the extraction pipeline between the air joint and the vacuum pump, and the other end of the intake pipeline is connected to an air compressor. The extraction pipeline and the intake pipeline are controlled by a control valve. When the clamping seat resets and disengages from the steel guard, air is introduced into the air groove to reduce the sliding friction force and make the disengagement easier. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present invention will be further described below with reference to the drawings.

[0040] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0041] Figure 2 is a schematic diagram of the state of installing the steel guard by the steel guard installation mechanism of the present invention;

[0042] Figure 3 is a schematic diagram of the structure of the steel guard installation mechanism of the present invention Figure 1 ;

[0043] Figure 4 is a schematic diagram of the structure of the steel guard installation mechanism of the present invention Figure 2 ;

[0044] Figure 5 is a schematic diagram of the cooperation structure of the connecting rod, the connecting boss and the supporting boss of the present invention;

[0045] Figure 6 is Figure 5 the enlarged structure schematic diagram of area A in

[0046] Figure 7 is a schematic diagram of the cross-sectional structure of the clamping seat of the present invention;

[0047] Figure 8 is a schematic diagram of the positioning boss structure of the present invention;

[0048] Figure 9 It is a schematic diagram of the position of the positioning boss of the present invention;

[0049] Figure 10 It is a schematic diagram of the structure of the positioning component of the present invention;

[0050] Figure 11 It is a schematic diagram of the structure among the positioning rod, the positioning sleeve and the moving rod of the present invention;

[0051] Figure 12 It is a schematic diagram of the open-mold state of the positioning component of the present invention.

[0052] In the figure: 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 part; 6, upper template; 7, bottom mold; 8, steel guard installation mechanism; 81, connecting frame one; 82, connecting frame two; 83, supporting bracket; 84, supporting boss; 85, clamping seat; 851, air groove; 86, connecting seat; 87, connecting boss; 88, connecting rod; 89, lower spring; 810, upper spring; 811, air joint; 9, steel guard; 10, puncture-resistant pad; 100, boot body forming cavity; 200, runner; 500, air duct; 700, boot sole forming cavity. Specific embodiments

[0053] Next, in combination with specific embodiments, the present application will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be combined arbitrarily to form new embodiments.

[0054] In the description of the present application, it should be noted that for the orientation terms, such as the terms "center", "horizontal", "vertical", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and position relationship are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present application. The terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. The terms "include" and "have" in the description and claims of the present application and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0055] Embodiment 1

[0056] As Figure 1 and Figure 2 shown, this embodiment provides a rubber boot forming 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;

[0057] Wherein a cavity is vertically penetrated inside the outer mold 1, the upper core mold 2 is arranged at the inner top of the cavity, the lower core mold 3 is arranged at the inner bottom of the cavity and can move up and down, the lower mold 4 is movably arranged on the lower side of the outer mold 1, and the bottom mold 7 is movably arranged on the lower side of the outer mold 1 and is located below the lower mold 4;

[0058] A boot body forming cavity 100 is formed among the above-mentioned outer mold 1, upper core mold 2, lower core mold 3, and lower mold 4 for forming the boot body of the rubber boot, and a runner 200 communicating with the boot body forming cavity 100 is opened on the upper core mold 2 for injection molding.

[0059] Preferably, the outer mold 1 in this embodiment is an integral structure, so there will be no mold joint line that affects the appearance on the formed boot body; and even if there is a mold joint line at the mold joint surface 32 between the upper core mold 2 and the lower core mold 3, since the mold joint line is located inside the boot body, it does not affect the appearance. On the other hand, a lining needs to be pasted inside the rubber boot, and the lining will cover this mold joint line, so it will not affect the wearing comfort either.

[0060] Preferably, this embodiment does not limit the specific installation method of the lower core mold 3 that can move up and down. The following provides a specific installation method for elaboration: As Figure 2 shown, a rubber boot forming mold with an anti-smashing structure in this embodiment further includes a driving member 5 that can drive the lower core mold 3 to move up and down. The driving member 5 is arranged on the outer mold 1 or the upper core mold 2, and the bottom end of the driving member 5 is connected to the lower core mold 3; among them, the driving member 5 is a prior art, such as a cylinder, an oil cylinder, a hydraulic cylinder, etc.

[0061] It should be further noted that: in order to prevent the upper core mold 2 and the lower core mold 3 from being misaligned in the mold opening or closing state, in this embodiment, as Figure 1 and Figure 2 shown, a positioning groove 21 with a trapezoidal structure is opened at the lower end of the upper core mold 2, and a positioning portion 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 by the driving member 5 to close the mold, so that the positioning portion 31 is inserted into the positioning groove 21 for mold closing positioning, thereby correcting the offset error caused by the uneven center of gravity between the lower core mold 3 and the upper core mold 2, and ensuring the quality of the boot body forming.

[0062] Preferably, the mold closing surface 32 in this embodiment is opened at the narrowest part of the boot barrel of the boot body, so that the upper core mold 2 and the lower core mold 3 are separated more smoothly, avoiding the generation of undercuts and making it difficult to demold the formed rubber boot.

[0063] Preferably, the installation method of the lower mold 4 being movably installed includes the up-and-down movable installation of the lower mold 4 and being driven to move to the outside of the outer mold 1. The installation method of the lower mold 4 being up-and-down movable and being driven to move to the outside of the outer mold 1 is a prior art; for example, both opposite sides of the lower mold 4 are horizontally slidably connected to the guide rails, and a horizontal cylinder or a horizontal hydraulic cylinder for driving the horizontal sliding of the lower mold 4 is matched on the guide rails, and the guide rails are connected to the support platform through a lifting cylinder or a lifting hydraulic cylinder and can be slidably positioned up and down in cooperation with the guide posts. Then, when the lifting cylinder or the lifting hydraulic cylinder drives the guide rails 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 by the horizontal cylinder or the horizontal hydraulic cylinder, the lower mold 4 can be moved to the outside of the outer mold 1.

[0064] 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 extruded by the bottom mold 7 and the lower mold 4 after the mold is closed to form the boot sole; then, in cooperation with the boot body formed in the boot body forming cavity 100 by injection molding, a rubber boot is formed through vulcanization, realizing the integrated production of the rubber boot, and improving the production efficiency and production quality.

[0065] Preferably, the up-and-down movable mounting method of the bottom mold 7 is a prior art. For example, the bottom mold 7 is driven to move up and down by a hydraulic cylinder, and is limited by sliding up and down with a guide post.

[0066] Preferably, this embodiment is further provided with an upper template 6, which is movably arranged up and down on the top of the outer mold 1 and is 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 first driven to drive the upper core mold 2 to open upward. Since the upper core mold 2 is used to form the upper part of the boot barrel of the boot body, that is, 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. Then, when the lower core mold 3 is driven to move away from the upper core mold 2, the upper part of the boot barrel of the boot body is more likely to be demolded, and scratches on the outer side of the boot body can also be avoided.

[0067] It should be noted that the mold opening distance of the upper template 6 is less than the thickness of the boot surface rubber to avoid mold collision. The mounting method of the upper template 6 is a prior art, such as driving the upper template 6 to move up and down by a hydraulic cylinder, and limiting the movement by sliding up and down with a guide post.

[0068] Further preferably, in order to directly integrate the steel guard 9 at the boot surface part of the rubber boot during the injection molding of the rubber boot body, so that the steel guard 9 can be integrally injection molded with the boot surface of the rubber boot, without secondary assembly, and problems such as the steel guard 9 shifting or falling off on the rubber boot can be avoided.

[0069] A rubber boot molding die with an anti-smashing structure in this embodiment further includes a steel guard mounting mechanism 8, which is horizontally movably arranged on one side of the outer mold 1 and is located on the side close to the boot head of the rubber boot.

[0070] During the operation of this embodiment, by driving the steel guard mounting mechanism 8 as Figure 2 shown, the steel guard 9 is installed on the lower core mold 3, and then through injection molding, the steel guard 9 is integrally injection molded with the boot body and integrated at the boot surface position of the rubber boot to form a boot body integrated structure with the steel guard 9.

[0071] Preferably, in this embodiment, the steel guard 9 can be directly sleeved on the outer surface of the lower core mold 3 for integral injection molding. There is no rubber layer or only a small amount of rubber on the lower surface of the steel guard 9 (formed by a small amount of raw materials entering through the contact gap between the lower surface of the steel guard 9 and the outer surface of the lower core mold 3), and the metal surface of the steel guard 9 is isolated by a subsequent lining.

[0072] Furthermore, in order to make the steel guard 9 more stable when integrated into the boot body in this embodiment, the steel guard 9 is embedded inside the rubber layer of the boot body. In this embodiment, a support rib (not shown in the figure) extending along the length direction of the rubber boot can also be provided on the corresponding outer surface of the lower core mold 3, and the steel guard 9 is sleeved on the support rib; during integral injection molding, the molten raw material enters through the gap between adjacent support ribs to complete the coating of the steel guard 9, so that the steel guard 9 is embedded inside the rubber layer of the boot body, ensuring the stability of the steel guard 9 during use.

[0073] Further preferably, as Figures 3 - 7 shown, the steel guard installation mechanism 8 in this embodiment includes a horizontally arranged connecting frame one 81. At both ends of the connecting frame one 81 close to the lower core mold 3, connecting frames two 82 are symmetrically arranged. The other ends of the two groups of connecting frames two 82 are both connected with a bearing bracket 83. A clamping seat 85 is arranged between the two bearing brackets 83. Symmetrically connected to both ends of the clamping seat 85 are connecting seats 86. On the top ends of the outer sides of the two connecting seats 86, connecting bosses 87 are arranged. On the bottom end of the inner side of the bearing bracket 83, a bearing boss 84 is arranged, and the two groups of bearing bosses 84 are arranged corresponding to the two groups of connecting bosses 87;

[0074] A connecting rod 88 is arranged on the bearing boss 84. The two connecting rods 88 are symmetrically arranged with respect to the clamping seat 85. The two groups of connecting bosses 87 are sleeved on the corresponding connecting rods 88. An upper spring 810 is arranged at the upper end of the connecting rod 88, and a lower spring 89 is arranged 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 upper 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 lower surface of the connecting boss 87, and the other end abuts against the upper surface of the bearing boss 84.

[0075] It should be noted in this embodiment that the connecting rod 88 in this embodiment can be fixedly arranged on the bearing boss 84 or can be threadedly connected to the bearing boss 84: One way can be to provide a threaded hole on the bearing boss 84 and an external thread on the connecting part at the lower end of the connecting rod 88, and threadedly connect the connecting rod 88 into the threaded hole on the bearing boss 84. By using threaded connection, the supporting length of the connecting rod 88 can be adjusted, and then the tightness of the cooperation between the upper spring 810 and the lower spring 89 can be adjusted, and further the up-and-down elastic adjustment degree of the clamping seat 85 can be adjusted.

[0076] Further, since the steel protector 9 needs to pass through the boot part of the lower core mold 3 during actual installation, the steel protector 9 needs to be installed in a downwardly inclined manner. To prevent the steel protector 9 from slipping off after being placed in the card holder 85, a card cavity is provided inside the card holder 85 in this embodiment. An air groove 851 is opened on the upper surface of the card cavity, and the air groove 851 is arranged along the arc of the card cavity inside the card holder 85, and both ends of the air groove 851 are closed ends. A plurality of air connectors 811 are arranged on the outer top surface of the corresponding card holder 85 along the direction of the air groove 851, and the plurality of air connectors 811 communicate with the air groove 851. The other ends of the plurality of air connectors 811 are cooperatively connected to an external vacuum pump to achieve air extraction. By forming a negative pressure in the air groove 851, the steel protector 9 placed in the card cavity is adsorbed.

[0077] During the operation of this embodiment, the steel protector 9 is placed in the card holder 85, and the external vacuum pump is used to extract air to form a negative pressure in the air groove 851, adsorbing the placed card holder 85. Then, the steel protector installation mechanism 8 is driven to move downward towards the lower core mold 3, and the steel protector 9 is sleeved on the lower core mold 3. After sleeving, the vacuum pump is disconnected, the steel protector 9 is released, and the steel protector installation mechanism 8 returns to its original position.

[0078] During the sleeving process, since the boot surface part of the lower core mold 3 has a certain physiological arc (as Figure 2 shown), there needs to be a slight position change in the up and down direction during the horizontal sleeving of the steel protector 9. When the card holder 85 drives the steel protector 9 during sleeving and extrusion, it can be slightly adjusted in the up and down direction along the connecting rod 88, and the upper spring 810 and the lower spring 89 are respectively squeezed during up and down movement. Through the elastic force limitation of the upper spring 810 and the lower spring 89, the phenomenon of displacement and jamming during the sleeving of the steel protector 9 is avoided.

[0079] And as described above, threaded connection can also be used to control the tightness of the cooperation between the upper spring 810 and the lower spring 89, thereby making the sleeving process more stable and the up and down fluctuation range more reasonable.

[0080] It should be noted in this embodiment that the card cavity inside the card holder 85 in this embodiment fits the outer side surface of the steel protector 9. The card holder 85 can be cast according to the shape of the steel protector 9, or other processing techniques can be used for production, and no specific limitation is made here.

[0081] It should also be noted in this embodiment that using a vacuum pump for the steel protector 9 in this embodiment is not only to ensure that it does not slip off after being placed and tilted, but also to stabilize the steel protector 9 with the adsorption force, reduce the tightness of the connection between the steel protector 9 and the card holder 85 after extrusion assembly, and avoid difficult demolding. Further, to make it easier for the card holder 85 to return and disengage from the steel protector 9, an intake pipeline is connected to the extraction pipeline between the air connector 811 and the vacuum pump, and the other end of the intake pipeline is connected to an air compressor. The extraction pipeline and the intake pipeline are controlled by a control valve. When the card holder 85 returns and disengages from the steel protector 9, air is introduced into the air groove 851 to reduce the sliding friction force and make the disengagement easier.

[0082] Furthermore, as shown in Figure 5 and Figure 6 , in this embodiment, the connecting boss 87 and the connecting rod 88 are in clearance fit, and the unilateral clearance H of the fit is greater than 1.5 mm. During the sleeving process of the steel guard 9, the clamping seat 85 can deflect slightly in angle and fit flexibly, avoiding die damage or jamming during the rigid fit process.

[0083] It can be understood that the horizontal movable installation method of the steel guard installation mechanism 8 is a prior art. For example, the steel guard installation mechanism 8 is driven horizontally by a hydraulic cylinder, and corresponding guide rails can also be provided for guiding.

[0084] Preferably, the two groups of connecting frames II 82 in this embodiment can also be rotatably installed on the connecting frame I 81 in cooperation, and the connecting frame II 82 is deflected by a driving source such as a motor or a rotary cylinder, etc., so as to adjust the installation angle of the steel guard 9 to adapt to different installation conditions.

[0085] Embodiment II

[0086] As shown in Figures 8 - 12 , the difference between this embodiment and Embodiment I is that a positioning structure for the puncture-resistant pad 10 is also provided on the lower die 4 in this embodiment. Since the traditional rubber boot sole is difficult to counteract the puncture of a sharp object, the puncture-resistant pad 10 is added to the boot sole in this embodiment to improve the puncture resistance of the rubber boot.

[0087] Since the lower die 4 and the bottom die 7 form the boot sole by extruding the raw material, and directly adding the puncture-resistant pad 10 into the boot sole forming cavity 700 will cause position deviation during the extrusion process, resulting in uneven puncture resistance of the formed boot sole.

[0088] In this embodiment, a positioning structure is provided on the lower forming surface (the surface that cooperates with the boot sole forming cavity 700) of the lower die 4 for installing and positioning the puncture-resistant pad 10, preventing the mutual extrusion of the raw material in the boot sole forming cavity 700 during forming from causing the position deviation of the puncture-resistant pad 10.

[0089] The puncture-resistant pad 10 is provided with positioning holes corresponding to the positions of the positioning structure, and the positioning holes cooperate with the positioning structure to position the puncture-resistant pad 10 on the positioning structure before the boot sole is formed.

[0090] As shown in Figure 8 , the positioning structure can be positioning bosses 41 provided on the lower forming surface of the lower die 4. There are multiple groups of the positioning bosses 41, and among them, as shown in Figure 9As shown, one set is provided at each of the toe, heel, and middle part of the boot. Before the bottom of the boot is molded, the puncture-resistant pad 10 is sleeved on the corresponding positioning boss 41 through the positioning holes, so that the puncture-resistant pad 10 is positioned and installed on the lower molding surface of the lower mold 4, ensuring that the puncture-resistant pad 10 does not shift during the molding of the bottom of the boot.

[0091] As Figures 10 - 12 shown, another solution in this embodiment is that the positioning structure can also be a positioning component provided on the lower molding surface of the lower mold 4. The positioning component includes multiple groups of limiting grooves 42 opened on the lower molding surface of the lower mold 4. As Figure 9 shown, three groups of limiting grooves 42 are provided. An active spring 43 is arranged in the limiting groove 42. At one end of the active spring 43 away from the bottom of the limiting groove 42, a moving rod 45 is abutted. A positioning sleeve 44 is press-fitted and embedded at the notch of the limiting groove 42. 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 threadedly connected to the moving rod 45, and a circumferential sliding groove 47 is opened on one side of the positioning rod 46 close to the positioning sleeve 44, enabling the positioning rod 46 to move up and down in the limiting groove 42.

[0092] It should be noted that the elastic force of the active spring 43 is relatively large, greater than the pressing force for manually installing the puncture-resistant pad 10 (that is, when manually installing the puncture-resistant pad 10, the active spring 43 does not contract under force), and the extreme movement distance of the positioning rod 46 is less than the thickness of the puncture-resistant pad 10, that is, the positioning rod 46 still protrudes from the lower molding surface of the lower mold 4 after being compressed to the limit under force.

[0093] The working principle of this embodiment is as follows: During the mold opening between the lower mold 4 and the bottom mold 7, the puncture-resistant pad 10 is sleeved on the positioning rod 46 through the installation hole. Then, raw materials are added inside the bottom molding cavity 700. The lower mold 4 and the bottom mold 7 are closed to extrude the raw materials, and the high-pressure state inside squeezes the positioning rod 46 into the limiting groove 42 and fills part of the installation hole of the puncture-resistant pad 10, thereby forming the bottom of the boot with the puncture-resistant pad 10 carried.

[0094] During the mold opening process after molding, the positioning rod 46 is pushed out downward by the elastic force of the return spring 89 to complete the demolding of the bottom of the boot, avoiding the bottom of the boot 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, it is more convenient and easier for the puncture-resistant pad 10 to contact the positioning rod 46, and the bottom of the boot remains in the bottom molding cavity 700.

[0095] It should be noted that the use of a movable positioning component enables the position of the puncture-resistant pad 10 to be restricted during positioning and installation, and the contact area with the puncture-resistant pad 10 can be reduced during demolding, thereby avoiding the generation of demolding tensile force on the puncture-resistant pad 10 and preventing the bonding force between the puncture-resistant pad 10 and the boot sole from being affected (when the demolding tensile force is too large, it is easy to cause a bonding gap between the already bonded puncture-resistant pad 10 and the boot sole), improving the product quality.

[0096] It can be understood that the length of the sliding groove 47 opened 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. A threaded hole is opened on the moving rod 45, and a threaded post is provided on the positioning rod 46. When the positioning component needs to be disassembled, the positioning rod 46 is screwed out, combined with the moving rod 45 through a long bolt, and the positioning sleeve 44 is pulled out, thereby completing the overall disassembly.

[0097] Embodiment Three

[0098] As Figures 8 - 10 shown, the difference between this embodiment and Embodiment One or Embodiment Two is that the same mold is used to form a pair of rubber boots, and two sets of steel guard installation mechanisms 8 are correspondingly provided.

[0099] Embodiment Four

[0100] As Figure 1 shown, the difference between this embodiment and Embodiment One or Embodiment Two or Embodiment Three is that in this embodiment, an air passage 500 for ventilating the inside of the boot body is provided inside the upper core mold 2 and the lower core mold 3. During demolding, gas can be filled through the air passage 500 to facilitate the demolding of the rubber boots.

[0101] Embodiment Five

[0102] This embodiment provides a rubber boot molding process with an anti-smashing structure, using the molding mold described in Embodiment Two, including the following steps:

[0103] Feeding stage: Add a quantitative raw material to the boot sole forming cavity 700 area of the bottom mold 7, and put the puncture-resistant pad 10 on the positioning structure of the lower forming surface of the lower mold 4 through the installation hole;

[0104] Put 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.

[0105] 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, the lower mold 4 and the lower core mold 3 to move upward to complete mold closing. The raw material and the puncture-resistant pad 10 in the boot sole forming cavity 700 are formed into a boot sole containing the puncture-resistant pad 10 through extrusion.

[0106] Injection stage: The rubber compound is injected through the runner 200, and the rubber compound wraps the steel guard 9 to form a boot body with the steel guard 9.

[0107] Vulcanization stage: First, drive the bottom mold 7 and the lower mold 4 to move downward. After the lower mold 4 is separated from the outer mold 1 and the bottom mold 7 is separated 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 to move upward to close the mold with the outer mold 1, so that the boot body and the boot sole are vulcanized to form a rubber boot.

[0108] Demolding stage: First, drive the bottom mold 7 to move downward, and then drive the lower core mold 3 to move downward, and the rubber boot with the steel guard 9 and the puncture-resistant pad 10 can be taken out.

[0109] The above has described a specific embodiment of the present invention in detail, but the content described is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A rubber boot forming mold with an anti-smashing structure, comprising an outer mold (1), an upper core mold (2), a lower core mold (3), a lower mold (4) and a bottom mold (7), characterized in that, It further includes a steel guard installation mechanism (8); A cavity is vertically penetratingly arranged inside the outer mold (1). The upper core mold (2) is arranged at the inner top of the cavity. The lower core mold (3) is arranged at the inner bottom of the cavity in a vertically movable manner. The lower mold (4) is movably arranged on the lower side of the outer mold (1). The bottom mold (7) is arranged on the lower side of the outer mold (1) in a vertically movable manner, and the bottom mold (7) is located below the lower mold (4); A boot body forming cavity (100) is formed between the outer mold (1), the upper core mold (2), the lower core mold (3) and the lower mold (4). A boot sole forming cavity (700) is formed between the bottom mold (7) and the lower mold (4); The steel guard installation mechanism (8) installs a steel guard (9) that cooperates with the lower core mold (3) on the lower core mold (3). During injection molding, a boot body with the steel guard (9) is integrally formed.

2. The rubber boot forming mold with an anti-smashing structure according to claim 1, characterized in that A positioning groove (21) with a trapezoidal structure is formed at the lower end of the upper core mold (2). The lower core mold (3) is provided with a positioning portion (31) adapted to the positioning groove (21); A driving member (5) is arranged on the outer mold (1). The bottom end of the driving member (5) is connected to the lower core mold (3).

3. The rubber boot forming mold with an anti-smashing structure according to claim 1, characterized in that, The steel guard installation mechanism (8) includes a first connecting frame (81). One end of the first connecting frame (81) is symmetrically provided with second connecting frames (82). The other ends of the two second connecting frames (82) are both connected with a supporting bracket (83). A clamping seat (85) is arranged between the two supporting brackets (83).

4. A rubber boot forming mold with an anti-smashing structure according to claim 3, characterized in that, Both ends of the clamping seat (85) are symmetrically connected with connecting seats (86). Connecting bosses (87) are arranged at the top ends of the outer sides of the two connecting seats (86); Supporting bosses (84) are arranged at the bottom ends of the inner sides of the supporting brackets (83); The two supporting bosses (84) are arranged corresponding to the two connecting bosses (87).

5. The rubber boot molding die with an anti-smashing structure according to claim 4, characterized in that, Connecting rods (88) are arranged on the supporting bosses (84). The two connecting bosses (87) are sleeved on the corresponding connecting rods (88). Upper springs (810) are arranged at the upper ends of the connecting rods (88). Lower springs (89) are arranged at the lower ends of the connecting rods (88); The connecting bosses (87) are located between the upper springs (810) and the lower springs (89).

6. The rubber boot forming mold with an anti-smashing structure according to claim 5, characterized in that, A clamping cavity is arranged inside the clamping seat (85). An air groove (851) is formed on the top surface of the clamping cavity. A plurality of air connectors (811) are arranged on the top surface of the outside of the clamping seat (85) along the direction of the air groove (851). The plurality of air connectors (811) are all communicated with the air groove (851).

7. The rubber boot forming mold with an anti-smashing structure according to claim 6, characterized in that, The connecting boss (87) and the connecting rod (88) are in clearance fit, and the unilateral fit clearance H is greater than 1.5 mm.

8. A rubber boot molding die with an anti-smashing structure according to any one of claims 1-7, characterized in that, It further includes a positioning structure arranged on the lower mold (4); The positioning structure is used to prevent the puncture-resistant pad (10) from shifting in the boot sole forming cavity (700).

9. The rubber boot forming mold with an anti-smashing structure according to claim 8, characterized in that, The positioning structure is a positioning boss (41); Alternatively, the positioning structure is a positioning component, and the positioning component includes a plurality of groups of limiting grooves (42) formed on the lower forming surface of the lower die (4). An active spring (43), a positioning sleeve (44), a moving rod (45), and a positioning rod (46) are arranged in the limiting grooves (42). The positioning sleeve (44) is in interference fit with the notch of the limiting groove (42). The positioning rod (46) is sleeved in the positioning sleeve (44). The moving rod (45) is connected to the positioning rod (46). The active spring (43) abuts against the moving rod (45). The positioning rod (46) is adapted to the limiting groove (42). A sliding groove (47) is formed in a circle on one side of the positioning rod (46) close to the positioning sleeve (44).

10. A rubber boot molding process with an anti-smashing structure, characterized in that, Using a rubber boot forming mold with an anti-smashing structure as described in claim 9, the following steps are included: Feeding stage: Add a quantitative raw material to the area of the boot sole forming cavity (700) of the bottom die (7), and sleeved the puncture-resistant pad (10) onto the positioning structure of the lower forming surface of the lower die (4) through the mounting hole. Install 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 die (3). Mold closing stage: Control the lower die (4) to move between the outer die (1) and the bottom die (7), and control the bottom die (7), the lower die (4), and the lower core die (3) to move upward to complete mold closing. The raw material and the puncture-resistant pad (10) in the boot sole forming cavity (700) are formed into a boot sole containing the puncture-resistant pad (10) through extrusion. Injection molding stage: Inject rubber material through the runner (200). The rubber material coats the steel guard (9) to form a boot body with the steel guard (9). Vulcanization stage: First drive the bottom die (7) and the lower die (4) to move downward. After the lower die (4) is separated from the outer die (1) and the bottom die (7) is separated from the lower die (4), drive the lower die (4) to move to the outside of the outer die (1), and then drive the bottom die (7) to move upward to be closed with the outer die (1), so that the boot body and the boot sole are vulcanized to form a rubber boot. Demolding stage: First drive the bottom die (7) to move downward, and then drive the lower core die (3) to move downward, then the rubber boot with the steel guard (9) and the puncture-resistant pad (10) can be taken out.

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