A powder injection molding mold for alloy anti-slip studs

Abstract

An embodiment of the present invention provides an alloy anti-skid stud powder injection molding mold, which relates to the field of powder casting technology. By setting an integrally formed lower mold, the anti-skid stud can be taken out from the molding area by screwing it out after molding, thereby avoiding the problem of a difficult-to-remove mold line on the final product due to the molding area being formed by two sub-molds being molded together, thereby improving product quality.

Description

Technical Field

[0001] The invention relates to the technical field of powder casting, in particular to an alloy anti-skid stud powder injection molding die. Background Art

[0002] Anti-skid studs are tire accessories that are directly embedded in the tire surface to increase the tire's anti-skid ability and safety performance while making the tire more beautiful. They are mainly suitable for areas with long winters and thick ice and snow accumulation. In addition, high-risk driving methods such as off-road and racing that require driving on various uneven and harsh road conditions also require the protection of anti-skid studs.

[0003] In order to improve the anti-skid performance and connection performance of the anti-skid spikes, the shape of the anti-skid spikes is generally more complicated. For example, the outer surface of the anti-skid spikes is provided with structures such as threads and protrusions. For anti-skid spikes with threads, it is difficult to demould them after casting. In the prior art, by using a split mold for casting, the mold is separated and the anti-skid spikes are taken out after the casting is completed, which inevitably leaves a parting line on the surface of the anti-skid spikes. The anti-skid spikes are usually small in size and complex in shape, which makes it difficult to remove the parting line by conventional grinding methods, affecting the quality of the anti-skid spikes.

[0004] The information disclosed in the background technology section of the present invention is only intended to deepen the understanding of the general background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0005] Based on this, it is necessary to provide an alloy anti-skid stud powder injection molding mold to address the problem of poor quality of current anti-skid studs due to the presence of a parting line.

[0006] The above purpose is achieved through the following technical solutions:

[0007] An alloy anti-skid stud powder injection molding mold, comprising:

[0008] An upper mold, wherein a main flow channel is arranged in the upper mold;

[0009] A middle mold, wherein at least two branch runners are arranged in the middle mold, the branch runners are isolated from each other, and the branch runners are both connected to the main runner;

[0010] The lower mold is integrally formed, and the lower mold has at least two molding areas, the molding areas correspond to the diversion channels one by one, and the outer peripheral wall of the molding area is provided with a thread groove; the alloy anti-slip nails are taken out by rotation after being formed in the molding area.

[0011] In one embodiment, the upper mold can slide along a first direction and a second direction, wherein the first direction is an arrangement direction of the upper mold, the middle mold and the lower mold, and the second direction is any direction perpendicular to the first direction.

[0012] In one embodiment, at least one cross section of the branch channel is a non-rotational shape.

[0013] In one embodiment, the lower mold includes a first lower mold core, and the molding areas are all arranged in the first lower mold core.

[0014] In one embodiment, the lower mold includes at least two second lower mold cores, the molding area is arranged in the second lower mold cores, and the molding area and the second lower mold cores correspond one to one.

[0015] In one embodiment, the second lower mold core is capable of rotating around its own axis.

[0016] In one of the embodiments, a rotating assembly is further included, and the rotating assembly is used to drive the second lower mold core to rotate around its own axis.

[0017] In one embodiment, an extension portion is provided at the lower end of the second lower mold core, and at least a portion of the extension portion is located outside the lower mold. The rotating assembly includes a rotating motor and a connecting portion, and the rotating motor drives the extension portion to rotate via the connecting portion.

[0018] In one embodiment, an exhaust gap is provided between the second lower mold core and the lower mold, and the size of the exhaust gap is adjustable.

[0019] In one embodiment, a first elastic member is disposed between the second lower mold core and the lower mold, and the elastic force of the first elastic member is adjustable.

[0020] The beneficial effects of the present invention are:

[0021] The alloy anti-skid stud powder injection molding mold provided in the embodiment of the present invention, by setting an integrally formed lower mold, can remove the anti-skid stud from the molding area by screwing it out after molding, thereby avoiding the difficult-to-remove mold line on the final product due to the molding area being formed by two sub-molds being molded together, thereby improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of a powder injection molding die for alloy anti-skid studs provided in one embodiment of the present invention;

[0023] Figure 2 for Figure 1Exploded view of the powder injection molding mold for the alloy anti-slip studs;

[0024] Figure 3 for Figure 1 A cross-sectional view of a powder injection molding die for alloy anti-skid studs;

[0025] Figure 4 A schematic structural diagram of a powder injection molding die for alloy anti-skid studs provided in one embodiment of the present invention;

[0026] Figure 5 for Figure 4 A partial enlarged view of the powder injection molding die for the alloy anti-skid studs at position A;

[0027] Figure 6 for Figure 4 Exploded view of the powder injection molding mold for the alloy anti-slip studs;

[0028] Figure 7 for Figure 4 A cross-sectional view of a powder injection molding die for alloy anti-skid studs;

[0029] Figure 8 for Figure 7 A partial enlarged view of the C part of the powder injection molding mold for the alloy anti-slip studs.

[0030] in:

[0031] 100, upper mold; 110, main flow channel; 200, middle mold; 210, branch flow channel; 300, lower mold; 310, molding area; 312, thread groove; 320, first lower mold core; 330, second lower mold core; 332, extension; 334, adjustment nut; 340, first elastic member; 400, rotating assembly; 410, rotating motor; 420, output gear; 430, rack; 440, rotating gear; DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention 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 therefore cannot be understood as a limitation to the present invention.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] The embodiment of the present invention provides an alloy anti-skid stud powder injection molding die, such as Figure 1-Figure 8 As shown, it includes an upper mold 100, a middle mold 200 and a lower mold 300 arranged in sequence from top to bottom. The upper mold 100, the middle mold 200 and the lower mold 300 can move relative to each other and close or separate the molds. After closing the molds, the upper mold 100, the middle mold 200 and the lower mold 300 are tightly connected and form a relatively stable whole. The upper mold 100 is provided with a main flow channel 110, the upper end of the main flow channel 110 passes through the upper end surface of the upper mold 100, and the lower end passes through the lower end surface of the upper mold 100, and the area of ​​the main flow channel 110 located at the upper end surface of the upper mold 100 is smaller, and the area located at the lower end surface of the upper mold 100 is larger; at least two branch flow channels 210 are arranged in the middle mold 200, the branch flow channels 210 are isolated from each other, and the branch flow channels 210 are all connected to the main flow channel 110, and the lower mold 300 is provided with at least two molding areas 310, and the molding areas 310 and the branch flow channels 210 correspond to each other. After the mold is closed, the main flow channel 110 , the branch flow channel 210 and the molding area 310 are connected in sequence, and the molding material enters from the main flow channel 110 , flows to the molding area 310 through the branch flow channel 210 , and is molded in the molding area 310 .

[0036] Generally, in the prior art, the molding area 310 is formed by two sub-molds being joined together, so a parting line will be left on the surface of the product after molding; for anti-skid spikes with complex surface structures such as threads, it is difficult to remove the parting line by grinding or other methods, which affects the quality of the product. In this embodiment, the molding area 310 is composed of an integrally molded lower mold 300. Since the lower mold 300 is an integral mold, the molded product no longer has a parting line. Since threads are usually provided on the outer peripheral wall of the anti-skid spike, a thread groove 312 is also provided on the outer peripheral wall of the molding area 310. Moreover, due to the presence of the thread groove 312, after the anti-skid spike is formed and stabilized, the anti-skid spike can be taken out from the molding area 310 by rotating the anti-skid spike relative to the lower mold 300 under the action of the thread groove 312.

[0037] Therefore, the alloy anti-skid stud powder injection molding mold provided in the embodiment of the present invention, by setting an integrally formed lower mold 300, can be taken out of the molding area 310 by screwing it out after the anti-skid stud is formed, thereby avoiding the difficult-to-remove mold line on the final product due to the molding area 310 being formed by combining two sub-molds, thereby improving product quality.

[0038] In one embodiment, the upper mold 100 can slide along a first direction and a second direction, the first direction is the arrangement direction of the upper mold 100, the middle mold 200 and the lower mold 300 after the mold is closed, and the second direction is any direction perpendicular to the first direction; Figure 3 For example, the first direction is the up-down direction, and the second direction is the upper right-lower left direction. After the mold is closed, since the main channel 110 in the upper mold 100 and the branch channel 210 in the middle mold 200 are connected, after casting and molding, the main channel 110 in the upper mold 100 and the molded product in the branch channel 210 in the middle mold 200 are a whole. In order to obtain the final desired product shape, the upper mold 100 is slid relative to the middle mold 200 along the second direction, so that the molded product in the main channel 110 in the upper mold 100 and the molded product in the branch channel 210 in the middle mold 200 are disconnected; or, after the material enters the molding area 310 and fills the entire molding area 310 (in some cases, the material can be controlled to exceed the molding area 310), and the material has not exceeded the branch channel 210, the upper mold 100 is slid relative to the middle mold 200 along the second direction, so that the main channel 110 in the upper mold 100 and the branch channel 210 in the middle mold 200 are disconnected. Then, the upper mold 100 slides along the first direction and moves away from the middle mold 200 , thereby separating the upper mold 100 .

[0039] In one embodiment, the middle mold 200 can slide along a first direction and a second direction, the first direction is the arrangement direction of the upper mold 100, the middle mold 200 and the lower mold 300 after the mold is closed, and the second direction is any direction perpendicular to the first direction; Figure 3 For example, the first direction is the up-down direction, and the second direction is the upper right-lower left direction. After the mold is closed, since the runner 210 in the middle mold 200 is connected to the molding area 310 in the lower mold 300, after casting and molding, the runner 210 in the middle mold 200 and the molded product in the molding area 310 in the lower mold 300 are a whole. In order to obtain the final desired product shape, the middle mold 200 is slid relative to the lower mold 300 along the second direction, so that the molded product in the runner 210 in the middle mold 200 and the molded product in the molding area 310 in the lower mold 300 are disconnected; or, when the material enters the molding area 310 and the material has not yet filled the molding area 310, the middle mold 200 is slid relative to the lower mold 300 along the second direction, so that the runner 210 in the middle mold 200 and the molding area 310 in the lower mold 300 are disconnected. Then the middle mold 200 slides along the first direction and moves away from the middle mold 200, thereby separating the middle mold 200.

[0040] In one embodiment, at least one cross-section of the diverter channel 210 is a non-rotational shape. For example, in this embodiment, the upper section of the diverter channel 210 is a rectangular parallelepiped as a whole, and the cross-sections of the upper section of the diverter channel 210 are all square, so that after casting, the molded product can be easily removed from the lower mold 300.

[0041] In one embodiment, at least one first lower mold core 320 is disposed in the lower mold 300, and the molding areas 310 are all disposed in the first lower mold core 320. In this embodiment, a first lower mold core 320 is disposed in the lower mold 300, and three molding areas 310 are disposed in the first lower mold core 320, and the three molding areas 310 are evenly spaced.

[0042] In one embodiment, a plurality of accommodating chambers are provided in the lower mold 300, each of which is provided with a second lower mold core 330, and the molding area 310 is provided in the second lower mold core 330, and the molding area 310, the accommodating chamber and the second lower mold core 330 are in a one-to-one correspondence.

[0043] In one embodiment, the second lower mold core 330 can rotate around its own axis. The outer peripheral wall of the anti-skid spike is usually provided with a thread or other protruding structure to facilitate the installation and fixation of the anti-skid spike. After casting and molding, the second lower mold core 330 is rotated. Since the outer peripheral wall of the molding area 310 (that is, the inner peripheral wall of the second lower mold core 330) is provided with a thread groove 312, the second lower mold core 330 rotates and drives the molded product to move upward through the thread groove 312, so that the molded product is separated from the molding area 310. In particular, in some embodiments, at least one cross section of the diverter 210 is a non-rotational shape, such as the upper section of the diverter 210 is a rectangular parallelepiped as a whole, and the cross sections of the upper section of the diverter 210 are all square, and the middle mold 200 can slide along the first direction. Since the runner 210 is connected to the molding area 310, the molding material fills the molding area 310 and partially fills the runner 210. When the second lower mold core 330 is rotated, the molded product in the runner 210 cannot rotate relative to the middle mold 200, so that the entire molded product is stationary relative to the middle mold 200, thereby causing the molded product to rotate relative to the second lower mold core 330; during this process, the middle mold 200 moves upward along the first direction, and always keeps part of the molded product in the runner 210. It is understandable that the molded product can be prevented from rotating relative to the lower mold 300 by other means, such as fixing by a clamp.

[0044] In one embodiment, in order to facilitate the rotation of the second lower mold core 330, an extension portion 332 is provided at the lower end of the second lower mold core 330, and at least part of the extension portion 332 is located outside the lower mold 300. The rotating assembly 400 includes a rotating motor 410 and a connecting portion, and the rotating motor 410 drives the extension portion 332 to rotate through the connecting portion. For example, an output gear 420 is provided at the output end of the rotating motor 410, a rack 430 that can slide relative to the lower mold 300 is provided below the lower mold 300, and a rotating gear 440 is provided on the extension portion 332, and the output gear 420 and the rotating gear 440 are both meshed with the rack 430; the rotating motor 410 is started to drive the output gear 420 to rotate, the output gear 420 rotates to drive the rack 430 to slide, the rack 430 slides to drive multiple rotating gears 440 to rotate, and the rotating gear 440 rotates to drive the second lower mold core 330 to rotate. It is understandable that other rotational connection methods can be applied to the present invention, such as the rotating motor 410 driving the multiple second lower mold cores 330 to rotate through a gear system, or the multiple rotating motors 410 directly or indirectly driving the second lower mold cores 330 to rotate through a reduction mechanism.

[0045] In one embodiment, an exhaust gap is left between the second lower mold core 330 and the lower mold 300, and the size of the exhaust gap is adjustable. The larger the exhaust gap, the smoother the exhaust, and the smaller the exhaust gap, the less leakage of the molding material. When the viscosity of the molding material is high, it is less likely to leak, so the exhaust gap is increased to make the exhaust smoother and the leakage amount will not increase substantially; when the viscosity of the molding material is low, it is more likely to leak, so the exhaust gap is reduced to ensure that the leakage amount is not excessive.

[0046] In one embodiment, a first elastic member 340 is provided between the second lower mold core 330 and the lower mold 300, and the elastic force of the first elastic member 340 is adjustable, and the size of the exhaust gap is controlled by adjusting the elastic force of the first elastic member 340. For example, for the second lower mold core 330 with an extension portion 332, an adjustment thread is provided on the extension portion 332, and an adjustment nut 334 is sleeved on the adjustment thread. One end of the first elastic member 340 is fixed on the adjustment nut 334, and the other end is fixed on the lower mold 300; by rotating the adjustment nut 334, the relative position of the adjustment nut 334 on the extension portion 332 is adjusted, and then the elastic force of the second elastic member is controlled to control the size of the exhaust gap.

[0047] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A powder injection molding mold for alloy anti-skid studs, characterized in that: include: An upper mold, wherein a main flow channel is arranged in the upper mold; A middle mold, wherein at least two branch runners are arranged in the middle mold, the branch runners are isolated from each other, and the branch runners are both connected to the main runner; A lower mold, wherein the lower mold is integrally formed, and the lower mold is provided with at least two forming areas, wherein the forming areas correspond to the runners one by one, and the outer peripheral wall of the forming areas is provided with thread grooves; the alloy anti-slip studs are taken out by rotation after being formed in the forming areas; The upper mold can slide along a first direction and a second direction, wherein the first direction is the arrangement direction of the upper mold, the middle mold and the lower mold, and the second direction is any direction perpendicular to the first direction; At least one cross section of the flow branch channel is a non-revolutionary shape.

2. The alloy anti-skid stud powder injection molding mold according to claim 1, characterized in that: The lower mold includes a first lower mold core, and the molding areas are all arranged in the first lower mold core.

3. The alloy anti-skid stud powder injection molding mold according to claim 1, characterized in that: The lower mold includes at least two second lower mold cores, the molding area is arranged in the second lower mold cores, and the molding area and the second lower mold cores correspond one to one.

4. The alloy anti-skid stud powder injection molding mold according to claim 3, characterized in that: The second lower mold core can rotate around its own axis.

5. The alloy anti-skid stud powder injection molding mold according to claim 4, characterized in that: It also includes a rotating assembly, which is used to drive the second lower mold core to rotate around its own axis.

6. The alloy anti-skid stud powder injection molding die according to claim 5, characterized in that: An extension portion is provided at the lower end of the second lower mold core, and at least a portion of the extension portion is located outside the lower mold. The rotating assembly includes a rotating motor and a connecting portion, and the rotating motor drives the extension portion to rotate through the connecting portion.

7. The alloy anti-skid stud powder injection molding die according to claim 3, characterized in that: An exhaust gap is provided between the second lower mold core and the lower mold, and the size of the exhaust gap is adjustable.

8. The alloy anti-skid stud powder injection molding die according to claim 7, characterized in that: A first elastic member is arranged between the second lower mold core and the lower mold, and the elastic force of the first elastic member is adjustable.

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