A structure of the movable and fixed die shoe plates of a large die-casting die

Abstract

The present invention provides a movable and fixed die sleeve plate structure for a large die-casting mold, comprising: a movable die sleeve plate, a fixed die sleeve plate, a square guide sleeve assembly, a square guide pillar, a precise positioning anti-wear plate, and a water channel plate assembly. The movable die sleeve plate and the fixed die sleeve plate are respectively fixed on the movable and fixed templates of the die-casting machine. The square guide sleeve assembly and the square guide pillar are installed at the four corners of the movable die sleeve plate and the fixed die sleeve plate. A protrusion is provided on the fixed die sleeve plate, and the precise positioning anti-wear plate is installed outside the protrusion. The water channel plate assembly is arranged in the heat-concentrating area below the fixed die sleeve plate. The technical solution of the present invention solves the problems of low precision, complex manufacturing process, and difficult mold temperature control existing in the prior art for large die-casting molds.

Description

Technical Field

[0001] The present invention relates to the technical field of die-casting molds, and more particularly, to a movable and fixed mold platen structure for a large die-casting mold. Background Art

[0002] With the rapid development of China's automotive and electromechanical industries, the lightweight, integration, and large-scale of products have become the development trend. Especially in the past two years, due to the structural optimization of the integrated automotive body structure parts, the size of die-casting molds has become larger and the structure has become more complex. At present, the design and manufacturing of domestic die-casting molds are relatively mature for medium and small-sized molds. However, for large die-casting molds, there are still problems such as low precision, complex manufacturing processes, and difficult mold temperature control, resulting in low yield rates of large die-castings, poor reliability of molds, and short service life, which affect production efficiency and product quality.

[0003] The movable and fixed mold platens of die-casting molds are the most important structural parts of die-casting molds. However, it is difficult to disassemble the movable and fixed mold cavity inserts after they are assembled into the movable and fixed mold platens. Especially after use, due to thermal expansion and damage to the parting surface during use, it is difficult to disassemble. The volume of die-casting molds is relatively large, and it is difficult to control the temperature of the mold platens. It is very difficult for the mold and mold guide to maintain the original precision after thermal expansion, and the problems and potential failures existing in its structural design will directly affect die-casting quality, production efficiency, and mold service life. Summary of the Invention

[0004] In view of the above-mentioned technical problems of low precision, complex manufacturing process, and difficult mold temperature control existing in large die-casting molds, a movable and fixed mold platen structure for a large die-casting mold is provided.

[0005] The technical means adopted by the present invention are as follows:

[0006] A movable and fixed mold platen structure for a large die-casting mold, characterized in that it includes: a movable mold platen, a fixed mold platen, a square guide sleeve assembly, a square guide pillar, a precise positioning anti-wear plate, and a water channel plate assembly;

[0007] The movable mold platen and the fixed mold platen are respectively fixed on the movable and fixed templates of the die-casting machine;

[0008] The square guide sleeve assemblies and the square guide pillars are installed at the four corners of the movable mold platen and the fixed mold platen;

[0009] A protrusion is provided on the fixed mold platen, and the precise positioning anti-wear plate is installed outside the protrusion;

[0010] The water channel plate assembly is arranged in the heat concentration area below the fixed mold platen.

[0011] Further, the square guide sleeve assembly includes: a guide plate, a guide sleeve positioning key, and a bolt mounting post;

[0012] The moving die template is provided with the bolt mounting posts and the positioning grooves. The bolt fixes the side of the guide plate on the moving die template through the bolt mounting posts, and the guide bushing positioning key is installed in the positioning grooves;

[0013] The square guide post includes: a guide post body and a guide post positioning key. The side of the guide post body is fixed on the fixed die template, and the guide post positioning key is provided on the guide post body to position the installation position of the guide post body on the fixed die template through the guide post positioning key;

[0014] During the mold closing process, the guide post body slides on the guide plate;

[0015] The water circuit plate assembly includes: a water circuit plate, a gasket and a water pipe. The water circuit plate is fixed on the fixed die template, the gasket is arranged between the water circuit plate and the fixed die template, and the water pipe is hermetically installed on the water circuit plate.

[0016] Further, the outer side of the protrusion is an inclined surface II, the angle of the inclined surface II is 10°, and the precise positioning wear-resistant plate is 1 mm higher than the inclined surface II.

[0017] Further, square holes are respectively opened on the moving die template and the fixed die template, and the fixed die forming insert and the moving die forming insert are respectively installed on the fixed die template and the moving die template through the square holes;

[0018] Heating channels are respectively arranged along the perimeters of the fixed die forming insert and the moving die forming insert inside the fixed die template and the moving die template. The fixed die template is also provided with a sprue hole and a water channel hole, and the water circuit plate assembly is arranged below the sprue hole and connected to the water channel hole.

[0019] Further, a 4 mm gap is left between the fixed die template and the moving die template in the parting surface direction, that is, the parting surface of the moving die template is 2 mm lower than the moving die forming insert, and the parting surface of the fixed die template is 2 mm lower than the fixed die forming insert.

[0020] Further, the square guide bushing assembly and the square guide post adopt a sliding fit of H9 / e8 in the guiding direction during the mold closing process, and a 2 mm gap is left in the non-guiding direction.

[0021] Further, in the square hole, two adjacent sides are selected as straight surfaces as the design and processing reference, and the other two sides are inclined surfaces I with an angle of 10° to resist the influence of mold thermal deformation on the accuracy of the parting surface.

[0022] Furthermore, positioning holes and mounting holes are provided below both the moving die template and the fixed die template, and the fixed die template and the moving die template are mounted on the die bridge of the die-casting machine through the positioning holes and the mounting holes.

[0023] Furthermore, a lateral slider guide rail and two exhaust channel inserts are provided on the moving die template. A lateral slider is provided on the lateral slider guide rail. The moving die template is provided with a positioning boss, and the lateral slider guide rail and the exhaust channel inserts are mounted on the moving die template through the positioning boss.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] 1. For the structure of the moving and fixed die templates of a large die-casting mold provided by the present invention, after the mold is closed, only the moving and fixed die cavities contact and enclose the molten metal on the parting surface, and there is a gap in the direction of the parting surface of the moving and fixed die templates, which can ensure the mold closing accuracy of the large mold. Except for the fixed die forming insert and the moving die forming insert, other parts do not participate in the contact of the parting surface, avoiding the influence on the mold closing accuracy of the parting surface and the phenomenon of mold spraying, and improving the service life of the mold and the quality of the castings.

[0026] 2. For the structure of the moving and fixed die templates of a large die-casting mold provided by the present invention, by arranging a water channel hole and a water circuit plate assembly at the molten cup hole to cool the moving and fixed die templates, and arranging a heating channel to heat the moving and fixed die templates, the temperature of the moving and fixed die templates is controlled, the negative influence on the guiding accuracy of the mold in the hot state is reduced, the guiding accuracy of the mold is improved, and the die-casting quality, production efficiency and service life of the mold are improved.

[0027] Based on the above reasons, the present invention can be widely promoted in the fields of die-casting molds and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 It is a schematic diagram of the mold closing structure of the moving and fixed die templates of the large die-casting mold described in the present invention.

[0030] Figure 2 It is a schematic sectional view of the mold closing of the moving and fixed die templates of the large die-casting mold described in the present invention.

[0031] Figure 3 It is a schematic sectional view of the moving die template and the moving die insert described in the present invention.

[0032] Figure 4 Schematic cross-sectional structure diagram of the fixed mold platen and the fixed mold insert of the present invention.

[0033] Figure 5 Schematic structure diagram of the moving mold platen of the large die-casting mold of the present invention.

[0034] Figure 6 Side view of the moving mold platen of the large die-casting mold of the present invention.

[0035] Figure 7 Top view of the moving mold platen of the large die-casting mold of the present invention.

[0036] Figure 8 Schematic structure diagram of the square guide bushing assembly of the present invention.

[0037] Figure 9 Side view of the square guide bushing assembly of the present invention.

[0038] Figure 10 Partial structure schematic diagram of the square guide bushing assembly of the present invention.

[0039] Figure 11 Schematic structure diagram of the square guide bushing bolt mounting post of the present invention.

[0040] Figure 12 Schematic structure diagram of the fixed mold platen of the large die-casting mold of the present invention.

[0041] Figure 13 Side view of the fixed mold platen of the large die-casting mold of the present invention.

[0042] Figure 14 Top view of the fixed mold platen of the large die-casting mold of the present invention.

[0043] Figure 15 Schematic structure diagram of the square guide post of the present invention.

[0044] Figure 16 Schematic cross-sectional structure diagram of the square guide post of the present invention.

[0045] Figure 17 Schematic structure diagram of the precision positioning wear-resistant plate of the present invention.

[0046] Figure 18 Schematic diagram of the precision positioning wear-resistant plate in the N direction of the present invention.

[0047] Figure 19 Schematic structure diagram of the water channel plate of the present invention.

[0048] Figure 20 Schematic cross-sectional structure diagram of the water channel plate of the present invention.

[0049] In the figure: 1, moving die retaining plate; 101, exhaust passage insert; 102, lateral slide block; 103, positioning holes and mounting holes; 2, fixed die retaining plate; 201, water channel hole; 202, sprue hole; 3, fixed die forming insert; 4, moving die forming insert; 5, rectangular guide bushing assembly; 501, guide plate; 502, guide bushing positioning key; 503, bolt mounting post; 6, rectangular guide pillar; 601, guide pillar body; 602, guide pillar positioning key; 7, precision positioning anti-wear plate; 8, water circuit board assembly; 801, water circuit board; 802, gasket; 803, water pipe. Detailed implementation manners

[0050] It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention may be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0051] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part rather than all of the embodiments of the present invention. The description of at least one exemplary embodiment below is actually only illustrative and in no way restrictive of the present invention and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0052] It should be noted that the terms used herein are only for describing the specific implementation manners and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of the described features, steps, operations, devices, components and / or their combinations.

[0053] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific values should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0054] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom", etc. are generally based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description. Without contrary instructions, these orientation terms do not indicate and imply that the devices or elements referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the protection scope of the present invention: The orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0055] For ease of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "upper...", etc. can be used here to describe the spatial positional relationships between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the drawings for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations are made for the spatial relative descriptions used here.

[0056] In addition, it should be noted that the use of words such as "first", "second", etc. to limit components is only for the convenience of differentiating the corresponding components. Without additional statements, the above words have no special meanings. Therefore, they should not be construed as limiting the protection scope of the present invention.

[0057] Embodiment 1

[0058] As shown Figures 1 to 20 in the figure, the present invention provides a movable and fixed die sleeve plate structure for a large die-casting mold, comprising: a movable die sleeve plate 1, a fixed die sleeve plate 2, a square guide sleeve assembly 5, a square guide pillar 6, a precise positioning wear-resistant plate 7, and a water channel plate assembly 8;

[0059] Square holes are formed on both the movable die sleeve plate 1 and the fixed die sleeve plate 2. The square holes have straight surfaces on two adjacent sides and 10° inclined surfaces I on the other two sides. A fixed die forming insert 3 is installed in the square hole of the fixed die sleeve plate 2, and a movable die forming insert 4 is installed in the square hole of the movable die sleeve plate 1;

[0060] The movable die sleeve plate 1 and the fixed die sleeve plate 2 are respectively fixed on the movable and fixed templates of the die-casting machine, and the movement of the die-casting machine drives the movement of the movable die sleeve plate 1 to realize mold closing and mold opening. Square guide sleeve assemblies 5 are arranged at the four corners of the movable die sleeve plate 1, and square guide pillars 6 are arranged at the four corners of the fixed die sleeve plate 2. Installation grooves for installing the square guide sleeve assemblies 5 and the square guide pillars 6 are formed on both the movable die sleeve plate 1 and the fixed die sleeve plate 2;

[0061] The square guide sleeve assembly 5 includes: a guide plate 501, a guide sleeve positioning key 502, and a bolt installation column 503. The movable die sleeve plate 1 is provided with the bolt installation column 503 and a positioning groove. Bolts fix the side of the guide plate 501 to the movable die sleeve plate 1 through the bolt installation column 503. The square guide sleeve positioning key 502 is placed in the positioning groove. The fixed die sleeve plate 2 is assembled with the square guide pillar 6, the precise positioning wear-resistant plate 7, and the water channel plate assembly 8;

[0062] The square guide pillar 6 includes: a guide pillar body 601 and a guide pillar positioning key 602. The guide pillar body 601 is fixedly connected to the fixed die sleeve plate 2 by an internal hexagonal bolt. The guide pillar body 601 is provided with the guide pillar positioning key 602, and the guide pillar positioning key 602 is used to position the guide pillar body 601;

[0063] During the mold closing process, the guide pillar body 601 slides on the guide plate 501;

[0064] A protrusion is provided at the upper end of the fixed die sleeve plate 2. One side of the protrusion is an inclined surface II with an angle of 10°. The precise positioning wear-resistant plate 7 is installed on the inclined surface II, and a groove is formed on the inclined surface II so that the precise positioning wear-resistant plate 7 is embedded in the fixed die sleeve plate 2 and fixed with bolts. The precise positioning wear-resistant plate 7 protrudes 1 mm above the inclined surface II and is used for the precise positioning of the fixed die sleeve plate 2 and the movable die sleeve plate 1. The precise positioning wear-resistant plate 7 can adjust the gap, prevent wear, and is easy to replace.

[0065] The water channel plate assembly 8 includes: a water channel plate 801, a gasket 802, and a water pipe 803. An inlet and an outlet are provided on the water channel plate 801. Both the inlet and the outlet are connected to the water pipe 803 through a sealing tape. The water channel plate 801 is fixedly connected to the fixed mold sleeve plate 2 by bolts, and the gasket 802 is provided between the water channel plate 801 and the fixed mold sleeve plate 2.

[0066] Further, the parting surface of the moving mold sleeve plate 1 is 2 mm lower than the parting surface of the moving mold forming insert 4, and the parting surface of the fixed mold sleeve plate 2 is 2 mm lower than the parting surface of the fixed mold forming insert 3.

[0067] Further, the gasket 802 is used to seal the water channel plate 801 to prevent the cooling water from leaking out.

[0068] Further, the square guide bushing assembly 5 and the square guide post 6 adopt a tolerance sliding fit of H9 / e8 in the guiding direction during the mold closing process, and a clearance tolerance of 2 mm in the non-guiding direction, so as to avoid the uneven heat absorption of the mold affecting the guiding accuracy of the mold.

[0069] The precise positioning design of the square guide bushing assembly 5 and the square guide post 6 can avoid the adverse effect on the guiding accuracy of the mold when the static and dynamic mold sleeves of the large die-casting mold are under different heat conditions, and further improve the use accuracy of the mold.

[0070] Further, a lateral slider guide rail and two exhaust channel inserts 101 are provided on the moving mold sleeve plate 1. A lateral slider 102 is provided on the lateral slider guide rail. The moving mold sleeve plate 1 and the lateral slider guide rail, and the moving mold sleeve plate 1 and the exhaust channel insert 101 are all integrally positioned. A positioning boss is provided on the moving mold sleeve plate 1. The exhaust channel insert 101 is located above the moving mold forming insert 4, and the lateral slider guide rail and the exhaust channel insert 101 are installed on the moving mold sleeve plate 1 through the positioning boss. The positioning boss is used to ensure the assembly accuracy and service life.

[0071] Further, two groups of positioning holes and mounting holes 103 are provided below the moving mold sleeve plate 1. The positioning holes and mounting holes 103 are used to quickly install the mold onto the mold bridge of the die-casting machine, which can reduce the upper mold time and improve the upper mold accuracy.

[0072] Further, heating channels are also provided inside the fixed mold platen 2 and the moving mold platen 1 along the periphery of the insert block to heat the low-temperature parts of the fixed mold platen 2 and the moving mold platen 1. Water channel holes 201 are provided in the area where heat is concentrated below the melting cup holes 202 of the fixed mold platen 2 and the moving mold platen 1. The water channel plate assembly 8 is arranged below the melting cup holes 202, and the water channel holes 201 are connected to the water channel plate assembly 8 to achieve water inlet and outlet, and to cool the parts with high heat at the melting cup holes 202.

[0073] Further, the water pipe 803 is a tapered thread water pipe.

[0074] Cooling water realizes water inlet and return through the water channel plate assembly 8. Cooling water enters through the water pipe 803, and conducts multi-loop parallel connection water to the area below the melting cup holes 202 of the fixed mold platen 2 through the horizontal water tank of the water channel plate 801. The return water converges through the water channel plate 801 and flows out through the water pipe 803. By heating and cooling different structural parts of the mold, the die-casting mold is ensured to be in a thermal equilibrium state.

[0075] Two adjacent sides in the square hole are straight surfaces, which are used as the reference for design and processing. The inclined surface I is provided to facilitate the installation and disassembly of the moving mold forming insert 4 and the fixed mold forming insert 3. Moreover, during the use of the mold, the heat of the mold cavity is relatively high. After the moving mold forming insert 4 and the fixed mold forming insert 3 are heated and expanded, they will extend along the direction of the inclined surface I to resist the influence of the thermal deformation of the mold on the accuracy of the parting surface.

[0076] During operation, the moving mold part of the mold where the moving mold platen 1 is located is closed with the fixed mold part of the mold where the fixed mold platen 2 is located under the action of the clamping system of the die-casting machine. The moving mold forming insert 4 and the fixed mold forming insert 3 are closed to form a gating system and a cavity. After closing the mold, only the moving and fixed mold cavities are in contact and closed with the molten metal on the parting surface. There is a gap between the moving mold platen 1 and the fixed mold platen 2 in the direction of the parting surface. This can ensure the closing accuracy of large molds. Except for the moving and fixed mold cavity inserts (or lateral sliders) being closely combined on the parting surface, other mold parts do not participate in the contact of the parting surface, avoiding affecting the closing accuracy of the parting surface and causing mold spraying during the die-casting process, which affects the use of the mold and the quality of the castings.

[0077] The structure of the moving and fixed mold platens of the large die-casting mold can be recycled on the basis of only replacing small parts, and the service life can reach more than 300,000 moldings.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A structure of a movable and fixed die set plate for a large die-casting mold, characterized in that, Comprising: Moving die template, fixed die template, square guide bushing assembly, square guide pillar, precision positioning anti-wear plate and water channel plate assembly; The moving die template and the fixed die template are respectively fixed on the moving and fixed templates of the die-casting machine; Square guide bushing assemblies and square guide pillars are installed at the four corners of the moving die template and the fixed die template; Square holes are respectively opened on the moving die template and the fixed die template, and the fixed die forming insert and the moving die forming insert are respectively installed on the fixed die template and the moving die template through the square holes; A protrusion is provided on the fixed die template, and the protrusion is arranged between the outer shape of the fixed die template and the square cavity of the central mounting insert; on the outer side of the protrusion is an inclined surface, and the precision positioning anti-wear plate is installed on the inclined surface; The water channel plate assembly is arranged in the heat-concentrating area below the fixed die template; the fixed die template is also provided with a melting cup hole and a water channel hole; the water channel plate assembly is arranged below the melting cup hole and is connected to the water channel hole; The square guide bushing assembly includes: a guide plate, a guide bushing positioning key and a bolt mounting post; The bolt mounting post and a positioning groove are provided on the moving die template, and the bolt fixes the side surface of the guide plate on the moving die template through the bolt mounting post, and the guide bushing positioning key is installed in the positioning groove; The square guide pillar includes: a guide pillar body and a guide pillar positioning key, the side surface of the guide pillar body is fixed on the fixed die template, and the guide pillar positioning key is provided on the guide pillar body, and the installation position of the guide pillar body on the fixed die template is positioned through the guide pillar positioning key; During the mold closing process, the guide pillar body slides on the guide plate; A 4-mm gap is left between the fixed die template and the moving die template in the parting surface direction, that is, the parting surface of the moving die template is 2 mm lower than the moving die forming insert, and the parting surface of the fixed die template is 2 mm lower than the fixed die forming insert; The square guide bushing assembly and the square guide pillar adopt an H9 / e8 sliding fit in the guiding direction during the mold closing process, and a 2-mm gap is left in the non-guiding direction.

2. The moving and fixed die set plate structure of the large die-casting die according to claim 1, wherein The outer side of the protrusion is an inclined surface II, the angle of the inclined surface II is 10°, and the precision positioning anti-wear plate is 1 mm higher than the inclined surface II.

3. The moving and fixed die shoe structure of the large die-casting die according to claim 1, wherein Heating channels are respectively arranged along the peripheries of the fixed die forming insert and the moving die forming insert inside the fixed die template and the moving die template.

4. The structure of the movable and fixed die shoe plates of a large die-casting die according to claim 1, wherein, In the square hole, two adjacent sides are selected as straight surfaces as the design and processing reference, and the other two sides are 10° inclined surfaces I for resisting the influence of mold thermal deformation on the parting surface accuracy.

5. The moving and fixed die shoe structure of the large die-casting die according to claim 1, characterized in that, Positioning holes and mounting holes are arranged below the moving die template and the fixed die template, and the fixed die template and the moving die template are installed on the die bridge of the die-casting machine through the positioning holes and the mounting holes.

6. The moving and fixed die shoe structure of the large die-casting die according to claim 1, wherein, A lateral slider guide rail and two exhaust channel inserts are arranged on the moving die template, a lateral slider is arranged on the lateral slider guide rail, a positioning boss is opened on the moving die template, and the lateral slider guide rail and the exhaust channel inserts are installed on the moving die template through the positioning boss.

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