A mold structure and mold processing technology

Abstract

The present invention provides a mold structure and a mold processing technology, belonging to the technical field of molds, including: a shell, in which a first long wall surface and a second long wall surface are arranged oppositely, the outer peripheral surface of the shell is arranged oppositely a first long peripheral surface and a second long peripheral surface, the first long wall surface is close to the first long peripheral surface, the second long wall surface is close to the second long peripheral surface, the distance from the middle of the first long wall surface to the first long peripheral surface is greater than the distance from the two sides of the first long wall surface to the first long peripheral surface, and the distance from the middle of the second long wall surface to the second long peripheral surface is greater than the distance from the two sides of the second long wall surface to the second long peripheral surface. Beneficial effects of the present invention: the first long wall surface and the second long wall surface are both concave toward the position of the accommodating cavity, increasing the pre-deformation, so that even if the first long wall surface and the second long wall surface are very long, the middle part thereof can still hold the inner core tightly after being heated and cooled, and no gap will appear.

Description

Technical Field

[0001] The invention belongs to the technical field of molds, and particularly relates to a mold structure. Background Art

[0002] Molds are various molds and tools used in industrial production to obtain the desired products by injection molding, blow molding, extrusion, die casting or forging, smelting, stamping and other methods. In short, molds are tools used to make molded objects.

[0003] The outer shell of some products is very long. In order to form such products with extra-long outer shells according to the existing molding technology, a very long inner core must be used for molding. The steel shells in the existing technology all adopt a linear accommodating cavity. Since the inner core and the outer shell adopt a red-packing assembly process, that is, the accommodating cavity of the outer shell is first heated and expanded, and then the inner core is placed in the accommodating cavity, and then the inner core is clamped after the outer shell is cooled. However, since the outer shell is too long, it is difficult for the middle part of the outer shell to return to its original shape after heating and cooling. Therefore, there is always a gap in the middle part of the inner core after being assembled with the outer shell. The existence of the gap will lead to insufficient supporting force in the middle part of the inner core. Therefore, in the subsequent actual production, it is easy to cause the middle part of the inner core to bend and deform under the influence of the punching force, thereby deforming the product. Therefore, it has a large room for improvement. Summary of the invention

[0004] The purpose of the present invention is to propose a mold structure in view of the above problems existing in the prior art.

[0005] The object of the present invention can be achieved through the following technical solutions: A mold structure, comprising:

[0006] A shell having a first long wall surface and a second long wall surface opposite to each other arranged therein, and an outer circumferential surface of the shell having a first long circumferential surface and a second long circumferential surface opposite to each other, wherein the first long wall surface is close to the first long circumferential surface, and the second long wall surface is close to the second long circumferential surface, and a distance from a middle portion of the first long wall surface to the first long circumferential surface is greater than a distance from both sides of the first long wall surface to the first long circumferential surface, and a distance from a middle portion of the second long wall surface to the second long circumferential surface is greater than a distance from both sides of the second long wall surface to the second long circumferential surface.

[0007] Preferably, the first long circumference and the second long circumference are both arranged as straight surface structures, the first long wall surface and the second long wall surface are both arranged as arc surface structures, and the middle part of the arc surface of the first long wall surface is far away from the first long circumference, and the middle part of the arc surface of the second long wall surface is far away from the second long circumference.

[0008] Preferably, a first short wall surface and a second short wall surface opposite to each other are further provided in the shell, and the first long wall surface, the first short wall surface, the second long wall surface and the second short wall surface are sequentially combined to form a receiving cavity.

[0009] Preferably, it also includes four transition arc surfaces, and the first long wall surface and the first short wall surface, the first short wall surface and the second long wall surface, the second long wall surface and the second short wall surface, and the second short wall surface and the first long wall surface are respectively connected by a transition arc surface.

[0010] Preferably, it further comprises an inner core, and the inner core is arranged in the accommodating cavity.

[0011] Preferably, the inner core is provided with a cavity, the cavity includes a first opening portion, a middle portion and a second opening portion, the middle portion is located between the first opening portion and the second opening portion, and the area of ​​the middle portion is smaller than the area of ​​the first opening portion and the area of ​​the second opening portion.

[0012] Preferably, the first opening portion and the second opening portion are respectively located at two ends of the cavity, the middle portion is located in the middle of the cavity, and the area of ​​the middle portion is the smallest in the cavity.

[0013] Secondly, a mold processing process is also provided, including a mold structure, and the following steps:

[0014] S1: processing the outer shell and the inner core respectively, so that the first long wall surface and the second long wall surface in the outer shell are arc surface structures, and the middle part of the arc surface of the first long wall surface is convex toward the center of the outer shell, and the middle part of the arc surface of the second long wall surface is also convex toward the center of the outer shell;

[0015] S2: heating the shell to expand it;

[0016] S3: The inner core is placed into the receiving cavity of the heated outer shell, and the assembly is completed after the outer shell cools down to room temperature.

[0017] Preferably, in step S1, a coordinate grinder is used to machine the cavity of the inner core.

[0018] Preferably, the method further comprises step S4: after the assembly is completed, continuing to perform stress relief annealing on the mold structure to eliminate the residual stress inside the mold.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. Both the first long wall surface and the second long wall surface are concave toward the accommodating cavity position, which increases the pre-deformation. In this way, even if the first long wall surface and the second long wall surface are very long, the middle part thereof can still hold the inner core tightly after being heated and cooled, and no gap will appear. Therefore, in the subsequent actual production, the middle part of the inner core can be provided with supporting force so that the inner core will not be deformed due to the punching force.

[0021] 2. The first long wall surface and the second long wall surface are both configured as arc surface structures, the middle portion of the arc surface of the first long wall surface protrudes toward the second long wall surface, and the middle portion of the arc surface of the second long wall surface protrudes toward the first long wall surface, which is equivalent to reducing the distance from the middle portion of the first long wall surface to the middle portion of the second long wall surface. Then, after being heated and cooled, the distance from the middle portion of the first long wall surface to the middle portion of the second long wall surface can be the same as the distance from both sides of the first long wall surface to both sides of the second long wall surface, thereby holding the inner core tightly without any gaps.

[0022] 3. The provision of four transition arc surfaces can make the assembly of the inner core and the shell more convenient.

[0023] 4. The first opening and the second opening are respectively located at the two ends of the cavity, and the middle part is located exactly in the middle of the cavity. The areas of the first opening and the second opening are larger than the area of ​​the middle part. This structure of the cavity can effectively prevent the product from deforming during stretching, thereby causing the product to be scrapped.

[0024] 5. A coordinate grinder is used to process the cavity of the inner core. The prior art uses slow wire cutting to process the cavity of the inner core. Silk marks will appear on the processed surface. Once silk marks appear, the surface appearance of the product will be greatly affected. In order not to affect the appearance, the surface of the inner core must be polished, which will cause the problem of product size being too large. However, using a coordinate grinder for plug grinding will completely avoid the problem of silk marks. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The figure is a top view of the outer shell of the mold structure for preventing product deformation according to the present invention.

[0026] Figure 2 The figure is a top view of the inner core of the mold structure for preventing product deformation according to the present invention.

[0027] Figure 3 This is a top view of the inner core of the mold structure for preventing product deformation of the present invention after being installed into the outer shell.

[0028] Figure 4 for Figure 3 Schematic diagram of the cross section of AA.

[0029] Figure 5 for Figure 3 Schematic diagram of the cross section of the BB.

[0030] In the figure, 100, outer shell; 110, first long wall surface; 120, second long wall surface; 130, first long circumference surface; 140, second long circumference surface; 150, first short wall surface; 160, second short wall surface; 170, accommodating cavity; 180, transition arc surface; 200, inner core; 210, cavity; 211, first opening portion; 212, middle portion; 213, second opening portion. DETAILED DESCRIPTION

[0031] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0032] like Figure 1-Figure 5 As shown, a mold structure includes: an outer shell 100 and an inner core 200, and the outer shell 100 and the inner core 200 are combined to form the mold structure.

[0033] Specifically, the housing 100 is provided with a first long wall surface 110 and a second long wall surface 120, and the first long wall surface 110 and the second long wall surface 120 are arranged opposite to each other. The outer peripheral surface of the housing 100 is provided with a first long peripheral surface 130 and a second long peripheral surface 140, and the first long peripheral surface 130 and the second long peripheral surface 140 are also arranged opposite to each other. The first long wall surface 110 is close to the first long peripheral surface 130, and the second long wall surface 120 is close to the second long peripheral surface 140. The distance from the middle of the first long wall surface 110 to the first long peripheral surface 130 is greater than the distance from the middle of the first long wall surface 110 to the first long peripheral surface 130. The distance from both sides of the first long wall surface 110 to the first long circumference 130 is greater than the distance from the middle of the second long wall surface 120 to the second long circumference 140. That is to say, the distance from both sides of the first long wall surface 110 to the first long circumference 130 is the farthest, and the middle part 212 of the first long wall surface 110 is the closest to the first long circumference 130. Similarly, the distance from both sides of the second long wall surface 120 to the second long circumference 140 is the farthest, and the middle part 212 of the second long wall surface 120 is the closest to the second long circumference 140.

[0034] In addition, the shell 100 is further provided with a first short wall surface 150 and a second short wall surface 160 opposite to each other, and the first long wall surface 110, the first short wall surface 150, the second long wall surface 120 and the second short wall surface 160 are sequentially closed to form a receiving cavity 170, wherein the inner core 200 is arranged in the receiving cavity 170 and the outer surface of the inner core 200 is in contact with and connected to the first long wall surface 110, the first short wall surface 150, the second long wall surface 120 and the second short wall surface 160;

[0035] It should be explained in detail here that the first long wall surface 110 and the second long wall surface 120 will be in contact with the two long surfaces of the inner core 200. When the inner core 200 is assembled into the accommodating cavity 170 in the outer shell 100, the outer shell 100 will be heated first. The outer shell 100 will expand due to the heat, thereby enlarging the accommodating cavity 170. At this time, the inner core 200 can be easily installed in the accommodating cavity 170. Finally, after the temperature of the outer shell 100 cools down, the outer shell 100 can hold the inner core 200 tightly to complete the assembly. However, in the prior art, since the inner core 200 is too long, the first long wall surface 110 and the second long wall surface 120 will be lengthened. When the first long wall surface 110 and the second long wall surface 120 are too long, it is difficult for them to return to their original shape after deformation. Therefore, the first long wall surface 110 and the second long wall surface cannot be completely fitted with the outer peripheral surface of the inner core 200 after cooling, thereby generating a gap. Therefore, the mold structure causes the first long wall surface 110 and the second long wall surface 120 to be pre-deformed, and the first long wall surface 110 and the second long wall surface 120 are both concave toward the accommodating cavity 170, so that the outer shell 100 can still hold the inner core 200 tightly after being heated and cooled, so that the outer shell 100 can provide support for the middle part of the inner core 200.

[0036] It should be pointed out that the first long wall surface 110 and the second long wall surface 120 are both concave toward the accommodating cavity 170, which increases the pre-deformation. In this way, even if the first long wall surface 110 and the second long wall surface 120 are very long, the middle part can still hold the inner core 200 tightly after being heated and cooled without any gap. Therefore, in the subsequent actual production, the middle part of the inner core 200 can be provided with support force so that the inner core 200 will not be deformed due to the punching force.

[0037] Preferably, the first long circumference 130 and the second long circumference 140 are both configured as straight surface structures, the first long wall surface 110 and the second long wall surface 120 are both configured as arc surface structures, and the middle of the arc surface of the first long wall surface 110 is away from the first long circumference 130, and the middle of the arc surface of the second long wall surface 120 is away from the second long circumference 140. In other words, the middle of the arc surface of the first long wall surface 110 bulges toward the second long wall surface 120, and the middle of the arc surface of the second long wall surface 120 bulges toward the first long wall surface 110, which is equivalent to reducing the distance from the middle of the first long wall surface 110 to the middle of the second long wall surface 120, so that the distance from the middle of the first long wall surface 110 to the middle of the second long wall surface 120 can be the same as the distance from the two sides of the first long wall surface 110 to the two sides of the second long wall surface 120 after being heated and cooled, so that the inner core 200 is tightly held without any gaps.

[0038] It should be pointed out that the first long wall surface 110 and the second long wall surface 120 are both arranged as arc surface structures, and the middle part of the arc surface of the first long wall surface 110 protrudes toward the second long wall surface 120, and the middle part of the arc surface of the second long wall surface 120 protrudes toward the first long wall surface 110. This is equivalent to reducing the distance from the middle part of the first long wall surface 110 to the middle part of the second long wall surface 120. Then, after being heated and cooled, the distance from the middle part of the first long wall surface 110 to the middle part of the second long wall surface 120 can be the same as the distance from the two sides of the first long wall surface 110 to the two sides of the second long wall surface 120, thereby holding the inner core 200 tightly without any gaps.

[0039] like Figure 1 , Figure 3 As shown, on the basis of the above embodiment, four transition arc surfaces 180 are further provided, and the transition arc surfaces 180 are used to connect various wall surfaces.

[0040] Specifically, the first long wall surface 110 and the first short wall surface 150, the first short wall surface 150 and the second long wall surface 120, the second long wall surface 120 and the second short wall surface 160, and the second short wall surface 160 and the first long wall surface 110 are respectively connected by the transition arc surface 180.

[0041] It should be noted that the provision of four transition arc surfaces 180 can make the assembly of the inner core 200 and the shell more convenient.

[0042] like Figure 3-Figure 5 As shown, on the basis of the above embodiment, the inner core 200 is provided with a cavity 210, and the cavity 210 is used to form the interior of the product. The prior art can easily deform the product during stretching.

[0043] Specifically, the cavity 210 includes a first opening portion 211, a middle portion 212, and a second opening portion 213. Figure 4 , Figure 5 The middle portion 212 is located between the first opening portion 211 and the second opening portion 213, and the area of ​​the middle portion 212 is smaller than the area of ​​the first opening portion 211 and the area of ​​the second opening portion 213. In terms of actual structure, the first opening portion 211 and the second opening portion 213 are respectively located at the two ends of the cavity 210, and the middle portion 212 is located exactly in the middle of the cavity 210, and the areas of the first opening portion 211 and the second opening portion 213 are larger than the area of ​​the middle portion 212, that is, the area gradually increases from the middle portion 212 toward the first opening portion 211 or the second opening portion 213.

[0044] It should be noted that the structure of the cavity 210 can effectively prevent the product from being deformed during stretching, thereby causing the product to be scrapped.

[0045] Preferably, two sides of the middle portion 212 are arranged as straight surface structures, and the area of ​​the middle portion 212 is the smallest in the cavity 210 .

[0046] Secondly, a mold processing process is also provided, including the following steps:

[0047] S1: processing the outer shell 100 and the inner core 200 respectively, so that the first long wall surface 110 and the second long wall surface 120 in the outer shell 100 are arc surface structures, and the middle part of the arc surface of the first long wall surface 110 is convex toward the center of the outer shell 100, and the middle part of the arc surface of the second long wall surface 120 is also convex toward the center of the outer shell 100;

[0048] S2: heating the housing 100 to expand it;

[0049] S3: The inner core 200 is placed into the receiving cavity 170 of the heated outer shell 100, and the assembly is completed after the outer shell 100 is cooled to room temperature.

[0050] Preferably, in step S1, a coordinate grinder is used to process the cavity 210 of the inner core 200. It should be noted that the prior art uses wire cutting to process the cavity 210 of the inner core 200, so that wire marks will appear on the processed surface. Once the wire marks appear, the surface appearance of the product will be greatly affected. In order not to affect the appearance, the surface of the inner core 200 must be polished, which will cause the problem of product size being too large. However, the use of a coordinate grinder for plug grinding will completely avoid the problem of wire marks.

[0051] Based on the above implementation, step S4 is also included: after the assembly is completed, the mold structure is further subjected to stress relief annealing to eliminate the residual stress inside the mold. It should be added that multiple stress relief processes can be added after the assembly is completed, so that the mold structure will not burst due to excessive stress in actual production.

[0052] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0053] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A processing technology for a mold structure, characterized in that: The mold structure comprises: A shell, wherein a first long wall surface and a second long wall surface are arranged opposite to each other, and an outer peripheral surface of the shell is arranged opposite to the first long peripheral surface and the second long peripheral surface, wherein the first long wall surface is close to the first long peripheral surface, and the second long wall surface is close to the second long peripheral surface, and the distance from the middle of the first long wall surface to the first long peripheral surface is greater than the distance from the two sides of the first long wall surface to the first long peripheral surface, and the distance from the middle of the second long wall surface to the second long peripheral surface is greater than the distance from the two sides of the second long wall surface to the second long peripheral surface; The shell is further provided with a first short wall surface and a second short wall surface opposite to each other, and the first long wall surface, the first short wall surface, the second long wall surface and the second short wall surface are sequentially closed to form a receiving cavity; It also includes an inner core, which is arranged in the accommodating cavity; The processing steps are as follows: S1: processing the outer shell and the inner core respectively, so that the first long wall surface and the second long wall surface in the outer shell are arc surface structures, and the middle part of the arc surface of the first long wall surface is convex toward the center of the outer shell, and the middle part of the arc surface of the second long wall surface is also convex toward the center of the outer shell; S2: heating the shell to expand it; S3: The inner core is placed into the receiving cavity of the heated outer shell, and the assembly is completed after the outer shell is cooled to room temperature.

2. A processing technology for a mold structure according to claim 1, characterized in that: The first long circumference and the second long circumference are both arranged as straight surface structures, the first long wall surface and the second long wall surface are both arranged as arc surface structures, and the middle part of the arc surface of the first long wall surface is away from the first long circumference, and the middle part of the arc surface of the second long wall surface is away from the second long circumference.

3. The processing technology of a mold structure according to claim 1, characterized in that: It also includes four transition arc surfaces, and the first long wall surface and the first short wall surface, the first short wall surface and the second long wall surface, the second long wall surface and the second short wall surface, and the second short wall surface and the first long wall surface are respectively connected by a transition arc surface.

4. The processing technology of a mold structure according to claim 1, characterized in that: The inner core is provided with a cavity, and the cavity includes a first opening portion, a middle portion and a second opening portion, the middle portion is located between the first opening portion and the second opening portion, and the area of ​​the middle portion is smaller than the area of ​​the first opening portion and the area of ​​the second opening portion.

5. A processing technology for a mold structure as claimed in claim 4, characterized in that: The first opening portion and the second opening portion are respectively located at two ends of the cavity, the middle portion is located in the middle of the cavity, and the area of ​​the middle portion is the smallest in the cavity.

6. The processing technology of a mold structure according to claim 1, characterized in that: In step S1 , a coordinate grinding machine is used to machine the cavity of the inner core.

7. The processing technology of a mold structure according to claim 1, characterized in that: The method further includes step S4: after the assembly is completed, continuing to perform stress relief annealing on the mold structure to eliminate the residual stress inside the mold.

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