Anti-sticking mold

Abstract

The utility model discloses a kind of anti-sticking mould plastic mould, the anti-sticking mould plastic mould includes: positioning ring, upper fixed plate, female mould plate, female mould core, male mould core, male mould plate, mould foot, lower fixed plate, upper ejection plate and lower ejection plate;Anti-sticking mould plastic mould further includes sliding block and inclined guide pillar, sliding block slidingly cooperates between female mould core and male mould core;The fixed end of inclined guide pillar is connected to female mould plate, and the movable end of inclined guide pillar cooperates in sliding block;The melt contact surface of female mould core and the melt contact surface of male mould core are respectively provided with directional microgroove array;Directional microgroove array includes several parallel equidistant directional microgrooves, and the groove depth direction of each directional microgroove is parallel with demoulding direction.The actual contact area of melt and mould surface is greatly reduced by groove structure of anti-sticking mould plastic mould, and the anti-sticking function of plastic mould is realized.

Description

Technical Field

[0001] This utility model relates to the field of plastic mold technology, and in particular to an anti-stick plastic mold. Background Technology

[0002] Plastic molds are precision tool systems used for the mass production of plastic products. Their core function is to inject molten plastic into a cavity, which then cools and solidifies to form parts of a specific shape. The essence and core functions of plastic molds include: ① Functional essence: As a molding carrier, it imparts geometric shape, dimensional accuracy, and surface texture to the molten plastic; as an efficiency engine, it enables high-speed continuous production (up to tens of pieces per minute); as a quality controller, it ensures product consistency through temperature / pressure / venting systems; ② Industrial positioning: As the "mother machine" of modern manufacturing, approximately 80% of plastic products rely on mold forming; as a key link in product development: mold costs account for 15-30% of new product development expenses. The existing core structure of plastic molds includes a molding system, a gating system, an ejection system, a cooling system, a guiding system, a venting system, and a core-pulling system. Based on the above structural system, its main workflow is: mold closing and locking, molten metal injection, cooling and solidification, mold opening and separation, ejection of the product, and resetting for the next cycle. Among these, mold opening and separation is an extremely important step in the plastic injection molding process, affecting the final appearance of the product.

[0003] However, existing plastic molds are inadequate in terms of anti-stick properties, which causes the surface of the product to easily adhere to the inner wall of the mold when it is demolded, ultimately damaging the integrity of the product surface, affecting the product's appearance, and increasing repair costs. Utility Model Content

[0004] Therefore, it is necessary to provide an anti-stick plastic mold to address the technical problem of insufficient anti-stick performance of existing plastic molds.

[0005] An anti-stick molding plastic mold includes a positioning ring, an upper fixing plate, a female template, a female mold core, a male mold core, a male template, a mold foot, a lower fixing plate, an upper ejector plate, and a lower ejector plate. The positioning ring, upper fixing plate, female template, male template, mold foot, and lower fixing plate are stacked sequentially. The female mold core is housed within the female template, and the male mold core is housed within the male template, with the female mold core and male mold core correspondingly fitting together. The upper ejector plate and lower ejector plate are stacked and installed on the inner side of the mold foot.

[0006] The anti-stick plastic mold also includes support columns and ejector pins. The support columns pass through the upper ejector plate and the lower ejector plate and are connected to the lower fixed plate and the male mold plate at both ends. One end of the ejector pin is connected to the upper ejector plate, and the other end extends to the female mold core.

[0007] The anti-stick molding plastic mold also includes a slider and a slanted guide post. The slider is slidably fitted between the female mold core and the male mold core. The fixed end of the slanted guide post is connected to the female mold plate, and the movable end of the slanted guide post is fitted with the slider.

[0008] The melt contact surfaces of the female mold core and the male mold core are respectively provided with directional microgroove arrays.

[0009] The directional microgroove array includes several parallel and equidistant directional microgrooves. The groove depth direction of each directional microgroove is parallel to the demolding direction, and the ratio between the groove depth, groove width and the spacing between adjacent grooves of each directional microgroove is 4:15:25.

[0010] In one embodiment, the width of each of the directional microgrooves is set to 30 μm, the depth is set to 8 μm, and the spacing between adjacent directional microgrooves is set to 50 μm.

[0011] In one embodiment, the aforementioned female template and male template are respectively provided with mounting slots, so that the female mold core is installed to the female template through the corresponding mounting slot, and the male mold core is installed to the male template through the corresponding mounting slot. In one embodiment, the bottom wall of each of the above-described mounting slots is provided with an elastic element.

[0012] In one embodiment, the tip of the ejector pin is provided with a DLC coating.

[0013] In one embodiment, the surface of the ejector pin rod is provided with a MoS2 coating.

[0014] In one embodiment, the upper and lower ejector plates have built-in piezoelectric sensor arrays.

[0015] In one embodiment, the working surface of the slider is provided with an anti-stick layer, and the slider abuts against the female mold core and the male mold core through the anti-stick layer.

[0016] In one embodiment, the sliding surface of the slider is embedded with a plurality of parallel and equidistant lubricating strips, each of which extends a number of times along the sliding direction of the slider.

[0017] In one embodiment, the aforementioned anti-stick layer is configured as an Fe-based amorphous alloy layer by laser cladding.

[0018] In one embodiment, the aforementioned lubricating strip is configured as a graphene lubricating strip.

[0019] In one embodiment, the movable end surface of the aforementioned inclined guide post is provided with a micro-pit texture layer.

[0020] In one embodiment, the pit depth of the aforementioned micro-pit texture layer is set to 5 μm, and the diameter is set to 40 μm.

[0021] In one embodiment, the aforementioned anti-stick molding plastic mold further includes a spade base that engages with the outer end of the slider.

[0022] In one embodiment, the aforementioned anti-stick molding plastic mold further includes a sprue bushing, which is disposed on the female mold plate and connected to the cavity of the female mold core.

[0023] The aforementioned anti-sticking plastic mold significantly reduces the actual contact area between the melt and the mold surface through its groove structure. Air trapped in the grooves forms a micro-cushion effect, reducing van der Waals force adhesion. Furthermore, the groove direction is parallel to the demolding direction, allowing the melt shrinkage stress to be released directionally along the grooves, while avoiding the "vacuum locking" phenomenon caused by lateral adhesion forces. In addition, limiting the depth, width, and spacing of the directional microgrooves can prevent micro-interlocking, prevent material accumulation, and prevent the melt from getting stuck after flowing into the groove. At the same time, it balances the anti-sticking effect with the strength of the groove structure, optimizes the melt sliding performance, and ultimately achieves the anti-sticking function of the plastic mold. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the anti-sticking plastic mold in one embodiment; Figure 2 This is an exploded structural diagram of the anti-sticking plastic mold in one embodiment; Figure 3 This is a schematic diagram of the anti-sticking plastic mold in one embodiment; Figure 4 for Figure 3 A schematic cross-sectional view of part AA in the illustrated embodiment; Figure 5 for Figure 4 An enlarged structural schematic diagram of part M in the illustrated embodiment; Figure 6 for Figure 4 An enlarged structural diagram of part N in the illustrated embodiment. Detailed Implementation

[0025] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0031] Please see Figures 1 to 6This utility model discloses an anti-sticking plastic mold 1, which includes a positioning ring 11, an upper fixing plate 12, a female template 13, a female mold core 14, a male mold core 15, a male template 16, a mold foot 17, a lower fixing plate 18, an upper ejector plate 19, and a lower ejector plate 20. The positioning ring 11, the upper fixing plate 12, the female template 13, the male template 16, the mold foot 17, and the lower fixing plate 18 are stacked sequentially. The female mold core 14 is housed in the female template 13, and the male mold core 15 is housed in the male template 16, with the female mold core 14 and the male mold core 15 correspondingly fitted. The upper ejector plate 19 and the lower ejector plate 20 are stacked and installed on the inner side of the mold foot 17. The anti-stick molding plastic mold 1 also includes a support column 21 and an ejector pin 22. The support column 21 passes through the upper ejector plate 19 and the lower ejector plate 20 and is connected at both ends to the lower fixed plate 18 and the male mold plate 16. One end of the ejector pin 22 is connected to the upper ejector plate 19, and the other end extends to the female mold core 14. The anti-stick molding plastic mold 1 also includes a slider 24 and an inclined guide post 25. The slider 24 is slidably fitted between the female mold core 14 and the male mold core 15. The fixed end of the inclined guide post 25 is connected to the female mold plate 13, and the movable end of the inclined guide post 25 is fitted with the slider 24. Based on the above settings, specifically, the melt contact surface of the female mold core 14 and the melt contact surface of the male mold core 15 are respectively provided with a directional microgroove array a to reduce the contact area between the plastic melt and the female mold core 14 and the male mold core 15, thereby greatly reducing the risk of the melt sticking to the female mold core 14 and the male mold core 15, and realizing the anti-sticking function of the anti-stick molding plastic mold 1 of this utility model. More specifically, the directional microgroove array a includes several parallel and equidistantly arranged directional microgrooves. The depth direction of each directional microgroove is parallel to the demolding direction, and the ratio of the depth, width, and spacing between adjacent microgrooves is 4:15:25. In one embodiment, the width of each directional microgroove is set to 30 μm, the depth is set to 8 μm, and the spacing between adjacent directional microgrooves is set to 50 μm. Based on this, the anti-sticking plastic mold 1 disclosed in this utility model significantly reduces the actual contact area between the melt and the mold surface through the groove structure. Air is trapped in the groove to form a micro-cushion effect, reducing van der Waals force adsorption. Furthermore, the groove direction is parallel to the demolding direction, which allows the melt shrinkage stress to be released directionally along the groove, while avoiding the "vacuum locking" phenomenon caused by lateral adhesion force. In addition, limiting the depth, width, and spacing of the directional micro-grooves can avoid micro-interlocking, prevent material accumulation, and prevent the melt from getting stuck after flowing into the groove. At the same time, it balances the anti-sticking effect with the strength of the groove structure, optimizes the melt sliding performance, and finally realizes the anti-sticking function of the plastic mold.

[0032] Furthermore, the female mold plate 13 and the male mold plate 16 are respectively provided with mounting grooves b, so that the female mold core 14 is installed to the female mold plate 13 through the corresponding mounting groove b, and the male mold core 15 is installed to the male mold plate 16 through the corresponding mounting groove b; based on this, an elastic element 23 is provided on the bottom wall of each mounting groove b. In this way, based on the elastic element 23, the mounting groove b can provide pre-pressure to the corresponding female mold core 14 and male mold core 15 to compensate for the thermal deformation of the female mold core 14 and male mold core 15, and prevent flash from forming during melt molding and causing sticking to the mold.

[0033] Furthermore, the top of the ejector pin 22 is provided with a DLC coating 22a to enhance the lubricity of the top of the ejector pin 22 and achieve the purpose of reducing stickiness at the end of the ejector pin 22; the surface of the rod of the ejector pin 22 is provided with a MoS2 coating 22b to enhance the lubrication performance of the surface of the rod of the ejector pin 22 and reduce the mechanical friction of the rod of the ejector pin 22 during demolding.

[0034] Furthermore, the upper ejector plate 19 and the lower ejector plate 20 are equipped with a piezoelectric sensor array (not shown) to detect the ejection force of the upper and lower ejector plates in real time and to provide timely feedback and adjustment.

[0035] Furthermore, the working surface of the slider 24 is provided with an anti-stick layer 24a. The slider 24 abuts against the female mold core 14 and the male mold core 15 through the anti-stick layer 24a, thereby enhancing the anti-stick capability of the working surface of the slider 24. A plurality of parallel and equidistant lubricating strips 24b are embedded in the sliding surface of the slider 24. Each lubricating strip 24b extends along the sliding direction of the slider 24, thereby effectively reducing the friction coefficient of the sliding surface of the slider 24. In one embodiment, the anti-stick layer 24a is set as an Fe-based amorphous alloy layer by laser cladding to provide high hardness and extreme anti-stick properties; in another embodiment, the lubricating strip 24b is set as a graphene lubricating strip 24b.

[0036] Furthermore, a micro-pit textured layer 25a is provided on the movable end surface of the inclined guide post 25 to effectively enhance the anti-adhesion of the inclined guide post 25 surface, while reducing wear on the movable end surface of the inclined guide post 25 and improving the lifespan of the inclined guide post 25. Specifically, in one embodiment, the pit depth of the micro-pit textured layer 25a is set to 5 μm and the diameter is set to 40 μm.

[0037] Furthermore, the anti-sticking plastic mold 1 also includes a spade base 26, which is fitted to the outer end of the slider 24 to fix and lock the slider 24, preventing the slider 24 from shifting under injection pressure and affecting the dimensional accuracy and appearance quality of the product.

[0038] Furthermore, the anti-stick molding plastic mold 1 also includes a sprue bushing 28, which is disposed on the female mold plate 13 and connected to the cavity of the female mold core 14 to introduce the melt into the cavity between the female mold core 14 and the male mold core 15.

[0039] In summary, the anti-sticking plastic mold disclosed in this utility model significantly reduces the actual contact area between the melt and the mold surface through the groove structure. Air is trapped in the groove to form a micro-cushion effect, reducing van der Waals force adsorption. Furthermore, the groove direction is parallel to the demolding direction, allowing the melt shrinkage stress to be released directionally along the groove, while avoiding the "vacuum locking" phenomenon caused by lateral adhesion force. In addition, limiting the depth, width, and spacing of the directional micro-grooves can avoid micro-interlocking, prevent material accumulation, and prevent the melt from getting stuck after flowing into the groove. At the same time, it balances the anti-sticking effect with the strength of the groove structure, optimizes the melt sliding performance, and ultimately achieves the anti-sticking function of the plastic mold.

[0040] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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.

[0041] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A non-stick plastic mold, characterized in that, include: The mold includes a positioning ring, an upper fixing plate, a female template, a female mold core, a male mold core, a male template, mold feet, a lower fixing plate, an upper ejector plate, and a lower ejector plate. The positioning ring, upper fixing plate, female template, male template, mold feet, and lower fixing plate are stacked sequentially. The female mold core is housed within the female template, and the male mold core is housed within the male template, with the female mold core and male mold core corresponding and mating. The upper ejector plate and lower ejector plate are stacked and installed on the inside of the mold feet. The anti-stick plastic mold also includes support columns and ejector pins. The support columns pass through the upper ejector plate and the lower ejector plate and are connected to the lower fixed plate and the male mold plate at both ends. One end of the ejector pin is connected to the upper ejector plate, and the other end extends to the female mold core. The anti-stick molding plastic mold also includes a slider and a slanted guide post. The slider is slidably fitted between the female mold core and the male mold core. The fixed end of the slanted guide post is connected to the female mold plate, and the movable end of the slanted guide post is fitted with the slider. The melt contact surfaces of the female mold core and the male mold core are respectively provided with directional microgroove arrays; The directional microgroove array includes several parallel and equidistant directional microgrooves. The groove depth direction of each directional microgroove is parallel to the demolding direction, and the ratio between the groove depth, groove width, and adjacent groove spacing of each directional microgroove is 4:15:

25.

2. The anti-sticking plastic mold according to claim 1, characterized in that, The width of each directional microgroove is set to 30 μm, the depth to 8 μm, and the spacing between adjacent directional microgrooves is set to 50 μm.

3. The anti-sticking plastic mold according to claim 2, characterized in that, The female template and the male template are respectively provided with mounting slots, so that the female mold core is installed to the female template through the corresponding mounting slot, and the male mold core is installed to the male template through the corresponding mounting slot.

4. The anti-sticking plastic mold according to claim 3, characterized in that, Each mounting slot has an elastic element on its bottom wall.

5. The anti-sticking plastic mold according to claim 4, characterized in that, The working surface of the slider is provided with an anti-stick layer, and the slider abuts against the female mold core and the male mold core through the anti-stick layer.

6. The anti-sticking plastic mold according to claim 5, characterized in that, The sliding surface of the slider is embedded with several parallel and equidistant lubricating strips, each of which extends along the sliding direction of the slider.

7. The anti-sticking plastic mold according to claim 6, characterized in that, The movable end surface of the inclined guide post is provided with a micro-pit texture layer.

8. The anti-sticking plastic mold according to claim 7, characterized in that, The pit depth of the micro-pit texture layer was set to 5 μm, and the diameter was set to 40 μm.

9. The anti-sticking plastic mold according to claim 8, characterized in that, The anti-stick molding plastic mold also includes a spade base, which fits into the outer end of the slider.

10. The anti-sticking plastic mold according to claim 9, characterized in that, The anti-stick plastic mold also includes a sprue bushing, which is set on the mother mold plate and connected to the cavity of the mother mold core.

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