Universal sub-wax structure

Abstract

The utility model belongs to the technical field of wax injection process, and particularly relates to a universal type sub-wax structure which comprises a plurality of flanges with the diameter phi of 80 mm of collecting ports, supporting mechanisms are arranged on the inner walls of the collecting ports, the supporting mechanisms support the collecting ports during wax injection, and the collecting ports are connected with the flanges. The supporting mechanism comprises a plurality of supporting circular rings matched with the collecting openings. According to the universal sub-wax structure, flanges of various products are overlapped, a completely overlapped part is calculated, the sub-wax structure is designed through the overlapped part, the designed sub-wax structure is processed to form a supporting convex nail, sub-wax is fixed in a mold, the sub-wax supporting convex nail is designed to be in a variable shape, and the purpose that the sub-wax can be manufactured according to the same caliber size is achieved. And other products with different sizes share the same wax, so that the problem of overlarge wax mold shrinkage is solved, the mold types are reduced, the mold cost is reduced, one mold has multiple purposes, and the product quality is considered.

Description

Technical Field

[0001] The utility model relates to the technical field of wax injection technology, in particular to a universal wax sub-structure. Background Art

[0002] In the current industry, when producing valve bodies, valve covers and other products with flanges, if the thickness exceeds 20mm, the wax mold shrinks greatly after wax injection production, resulting in unstable product dimensions and serious plane shrinkage, which leads to customer complaints and low yield, and increases factory production costs.

[0003] To solve the above problem, it is necessary to place wax in the mold in advance before the product is injected with wax to reduce the shrinkage of the wax mold. However, there are at least three types of products with the same caliber, and at most more than ten types. The cost of making a wax mold for each type is too high, which invisibly increases the fixed cost and does not achieve the essential effect of reducing costs and increasing efficiency. Therefore, the utility model solves the shortcomings of the above technical problems. Utility Model Content

[0004] Based on the above existing technical problems, the utility model proposes a universal sub-wax structure.

[0005] The utility model proposes a universal wax sub-structure, comprising a plurality of flanges with a collecting port diameter of φ80mm, the inner walls of the plurality of collecting ports being provided with a supporting mechanism, the supporting mechanism supporting the collecting ports during wax injection, the supporting mechanism comprising a supporting ring adapted to the plurality of collecting ports.

[0006] Preferably, the model specifications of the multiple flanges are DN80-PN16, DN80-PN25-01, and DN80-PN25-04 respectively.

[0007] Through the above technical solution, all flange dimensions of valve bodies and valve covers with a diameter of φ80mm are collected, including: thickness, inner diameter, outer diameter, aperture, hole angle, and overlapping flanges of multiple products. The completely overlapping parts are calculated, and the support mechanism is designed based on the overlapping parts. This allows products with the same diameter but different sizes to share the same support mechanism, thereby reducing the types of molds and reducing mold costs.

[0008] Preferably, the support mechanism further comprises support ears which are distributed in an annular array and fixedly connected to the outer surface of the support ring, and a side surface of the support ears extending outward is arc-shaped.

[0009] Through the above technical solution, the supporting mechanism is usually placed at the weak parts of the main wax model or the parts where shrinkage is expected to be larger to balance the overall shrinkage. In order to enable the supporting mechanism to be shared by products of the same caliber and other different sizes, outwardly extending supporting ears are provided so that they can extend to the weak parts of the wax model or the parts where shrinkage is expected to be larger, thereby effectively solving the problem of unstable product size caused by shrinkage of the wax model during wax injection.

[0010] Preferably, the support mechanism further comprises external support protrusions fixedly mounted on both side surfaces, the upper and lower surfaces and a side surface extending outwardly of the support ear piece, and the external support protrusions are in a cone shape.

[0011] Through the above technical scheme, in order to enable the support mechanism to grasp multiple different flange mold cavities and facilitate stable wax injection, external support protrusions are set on the surface of the support ear piece, so that it can fix the support mechanism and match the shrinkage rate of the main wax model.

[0012] Preferably, the upper and lower surfaces of the support ring are symmetrically distributed and fixedly connected with top support protrusions, and the inner surface of the support ring is fixedly connected with inner support protrusions distributed in a ring array, the top support protrusions and the inner support protrusions are both conical in shape, and the positions of the two groups of support protrusions are distributed at intervals.

[0013] Through the above technical scheme, in order to realize that products with the same caliber but other sizes can share the same support mechanism, top support protrusions and inner support protrusions are arranged on the surface of the support ring with staggered positions so that they can be distributed in the mold cavities of different products to achieve the supporting effect.

[0014] Preferably, the supporting ring, supporting ear piece, outer supporting convex nail, top supporting convex nail and inner supporting convex nail constitute a sub-wax with changeable shape, and the material of the sub-wax is the same as that of the main wax model.

[0015] Through the above technical solution, the shape of the sub-wax usually matches the weak or shrinkage-prone parts of the product, so that the sub-wax containing supporting convex pins is changeable in shape and can be evenly distributed and fixed in the mold to ensure that it will not move or shift during the wax injection process. The material of the sub-wax is the same as that of the main wax model, that is, paraffin wax, synthetic wax or natural wax, etc. These wax materials have good plasticity and fluidity, can fill the mold well during the molding process, and can be easily demolded during casting.

[0016] The beneficial effects of the present invention are:

[0017] By setting up a supporting mechanism, the problem of unstable product size caused by shrinkage of wax mold during wax injection can be effectively solved. During the adjustment process, the flanges of various products are overlapped, the completely overlapping part is calculated, and the sub-wax structure is designed through the overlapping part. The designed sub-wax structure is processed into supporting convex pins, and the sub-wax is fixed in the mold. The sub-wax supporting convex pins are designed to be variable in shape, so that products with the same caliber and other different sizes can share the same sub-wax, and the problem of excessive shrinkage of wax molds can be solved. At the same time, the types of molds can be reduced, the mold cost can be reduced, and one mold can be used for multiple purposes while taking product quality into consideration. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of a universal sub-wax structure proposed by the utility model;

[0019] Figure 2 A three-dimensional diagram of a DN80-PN1 flange structure of a universal sub-wax structure proposed by the utility model;

[0020] Figure 3 A three-dimensional diagram of the DN80-PN25-01 flange structure of a universal sub-wax structure proposed by the utility model;

[0021] Figure 4 This is a three-dimensional diagram of the DN80-PN25-04 model flange structure of a universal sub-wax structure proposed by the utility model.

[0022] In the figure: 1. flange; 2. collecting port; 3. supporting ring; 4. supporting ear piece; 5. outer supporting convex nail; 6. top supporting convex nail; 7. inner supporting convex nail. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Reference Figure 1-Figure 4 A universal wax sub-structure includes multiple flanges 1 with a collecting port 2 having a diameter of φ80 mm. The inner walls of the multiple collecting ports 2 are provided with a supporting mechanism, which supports the collecting ports 2 during wax injection, and the supporting mechanism includes a supporting ring 3 adapted to the multiple collecting ports 2.

[0025] The model specifications of multiple flanges 1 are DN80-PN16, DN80-PN25-01, and DN80-PN25-04. All flange 1 dimensions of valve body and valve cover with a collection port 2 diameter of φ80mm are collected, including: thickness, inner diameter, outer diameter, aperture, and hole angle. The flanges 1 of multiple products overlap, and the completely overlapping parts are calculated. The supporting mechanism is designed through the overlapping parts, so that products with the same caliber but different sizes can share the same supporting mechanism, thereby reducing the types of molds and reducing mold costs.

[0026] The support mechanism also includes support ears 4 distributed in a circular array and fixedly connected to the outer surface of the support ring 3. The surface of one side of the support ear 4 extending outward is arc-shaped. The support mechanism is usually placed at the weak part of the main wax model or the part where the shrinkage is expected to be larger to balance the overall shrinkage. In order to make the support mechanism shareable with products of the same caliber and other sizes, an outwardly extending support ear 4 is provided so that it can extend to the weak part of the wax model or the part where the shrinkage is expected to be larger, thereby effectively solving the problem of unstable product size caused by the shrinkage of the wax model during the wax injection process.

[0027] In order to enable the support mechanism to grasp multiple different flange 1 cavities and facilitate stable wax injection, the support mechanism also includes external support protrusions 5 fixedly installed on the two side surfaces, upper and lower surfaces and one side surface extending outward of the support ear 4. The external support protrusions 5 are conical in shape. The external support protrusions 5 are arranged on the surface of the support ear 4 so that they can fix the support mechanism and match the shrinkage rate of the main wax model.

[0028] In order to achieve the goal that products of the same caliber but different sizes can share the same supporting mechanism, the upper and lower surfaces of the support ring 3 are symmetrically distributed and fixedly connected with top supporting convex pins 6, and the inner surface of the support ring 3 is fixedly connected with inner supporting convex pins 7 distributed in a ring array. Both the top supporting convex pins 6 and the inner supporting convex pins 7 are conical in shape, and the positions of the two groups of supporting convex pins are distributed at intervals. Top supporting convex pins 6 and inner supporting convex pins 7 are arranged on the surface of the support ring 3 in staggered positions, so that they can be distributed in the mold cavities of different products to achieve a supporting effect.

[0029] The supporting ring 3, the supporting ear piece 4, the outer supporting convex pin 5, the top supporting convex pin 6 and the inner supporting convex pin 7 constitute a sub-wax with changeable shape, and the material of the sub-wax is the same as that of the main wax mold. The shape of the sub-wax usually matches the weak part or the part that is easy to shrink, so that the sub-wax containing the supporting convex pin has a changeable shape and can be evenly distributed and fixed in the mold to ensure that it will not move or offset during the wax injection process. The material of the sub-wax is the same as that of the main wax mold, that is, paraffin wax, synthetic wax or natural wax, etc. These wax materials have good plasticity and fluidity, can fill the mold well during the molding process, and can be easily demolded during casting.

[0030] By setting up a supporting mechanism, the problem of unstable product size caused by shrinkage of the wax mold during wax injection can be effectively solved. During the adjustment process, the flanges 1 of various products are overlapped, the completely overlapping part is calculated, and the sub-wax structure is designed through the overlapping part. The designed sub-wax structure is processed into supporting convex pins, and the sub-wax is fixed in the mold. The sub-wax supporting convex pins are designed to be variable in shape, so that the same sub-wax can be used for products of the same caliber but different sizes, and the problem of excessive shrinkage of the wax mold can be solved. At the same time, the types of molds can be reduced, the mold cost can be reduced, and one mold can be used for multiple purposes while taking product quality into consideration.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A universal wax sub-structure, comprising a plurality of flanges (1) with a collecting port (2) having a diameter of φ80 mm, characterized in that: The inner walls of the plurality of collecting ports (2) are provided with a supporting mechanism, the supporting mechanism supports the collecting ports (2) during wax injection, and the supporting mechanism comprises a supporting ring (3) adapted to the plurality of collecting ports (2).

2. A universal wax structure according to claim 1, characterized in that: The model specifications of the multiple flanges (1) are DN80-PN16, DN80-PN25-01, and DN80-PN25-04 respectively.

3. A universal wax structure according to claim 1, characterized in that: The support mechanism further comprises support ears (4) which are distributed in an annular array and fixedly connected to the outer surface of the support ring (3); a side surface of the support ears (4) extending outwards is arc-shaped.

4. A universal wax structure according to claim 3, characterized in that: The support mechanism also includes external support protrusions (5) fixedly mounted on both side surfaces, upper and lower surfaces, and one side surface extending outward of the support ear piece (4), and the external support protrusions (5) are in a cone shape.

5. A universal wax structure according to claim 4, characterized in that: The upper and lower surfaces of the support ring (3) are symmetrically distributed and fixedly connected with top support protrusions (6), and the inner surface of the support ring (3) is fixedly connected with inner support protrusions (7) distributed in a ring array, the top support protrusions (6) and the inner support protrusions (7) are both conical in shape, and the positions of the two groups of support protrusions are distributed at intervals.

6. A universal wax structure according to claim 5, characterized in that: The supporting ring (3), the supporting ear piece (4), the outer supporting convex nail (5), the top supporting convex nail (6), and the inner supporting convex nail (7) constitute a sub-wax with a changeable shape, and the material of the sub-wax is the same as that of the main wax model.

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