CN217941780U

CN217941780U - Investment mold structure using plastic as mold inner core

Info

Publication number: CN217941780U
Application number: CN202221976288.2U
Authority: CN
Inventors: 付世军; 郏洋洋; 李文彬; 齐鲁; 马华庆; 马忠星; 刘静国; 贺显标; 张加轩
Original assignee: Etam Alloy Shandong Co ltd
Current assignee: Etam Alloy Shandong Co ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-12-02
Anticipated expiration: 2032-07-29

Abstract

The utility model relates to an utilize investment mould structure of plastic as mould inner core belongs to investment precision casting technical field. The wax injection mold comprises a lower mold and an upper mold positioned above the lower mold, wherein a product cavity is formed between a plastic core and the side wall of an injection molding cavity, a wax injection hole is communicated with the product cavity, a combined part of the mold core and the plastic core is placed in a lower half mold cavity, the upper mold and the lower mold are buckled together, wax injection is completed through the wax injection hole, wax injection is performed to form a wax mold in the product cavity, the wax mold is taken out, the mold core and the plastic core are taken out, and the required wax mold is obtained. The utility model discloses following beneficial effect has: the method comprises the steps of obtaining a wax pattern product with a three-way tubular structure with a stepped hole inside, and then casting corresponding parts by using a dewaxing method.

Description

Investment mold structure using plastic as mold inner core

Technical Field

The utility model relates to an utilize plastic as fired mold die structure of mould inner core belongs to fired mold precision casting technical field.

Background

The mold casting is also called lost wax casting, and comprises the procedures of wax pressing, wax trimming, tree assembling, slurry dipping, wax melting, molten metal casting, post-treatment and the like. Lost wax casting is a process in which a wax pattern for a part to be cast is made of wax, and then the wax pattern is coated with slurry, that is, a clay pattern. And after the mud mold is dried, putting the mud mold into hot water to melt the internal wax mold. And taking out the clay mold after the wax mold is melted, and roasting to form the ceramic mold. Once calcined. Generally, a pouring gate is left when a mud mould is manufactured, then molten metal is poured into the mud mould from the pouring gate, and after the mud mould is cooled, required parts are manufactured.

Aiming at the product shown in figure 5, the product is a three-way tubular structure with a stepped hole inside, a part with a straight hole is cast at present, and then turning is carried out, so that the problems of large turning amount, low efficiency and material waste are caused under the process.

SUMMERY OF THE UTILITY MODEL

According to the not enough among the above prior art, the utility model discloses the technical problem who solves is: to solve one of the above problems, an investment mold structure using plastic as the mold core is provided.

Utilize the plastic as the fired mold structure of mould inner core, its characterized in that: including the lower mould and the last mould that is located the lower mould top, go up and have respectively on mould and the lower mould half die cavity, half die cavity down, the wax half hole is penetrated to the upper strata, the wax half hole is penetrated to the lower floor, half die cavity is pieced together to last half die cavity, half die cavity down form the die cavity of moulding plastics between last mould and the lower mould, the wax half hole is penetrated to the upper strata, the wax half hole is penetrated to the lower floor and pieced together form between last mould and the lower mould and penetrate the wax hole, the mould core has in the die cavity of moulding plastics, the cover is equipped with to have elastic plastics core on the mould core, and the plastics core is the flexible deformation spare that can distort, be the product die cavity between plastics core and the die cavity lateral wall, penetrate the wax hole and be linked together with the product die cavity, will go up mould and the lock together with the lower mould, accomplish through penetrating the wax hole and penetrate the wax, penetrate the wax and form the wax mould in the product die cavity, take out the wax mould core, take out mould core and plastics core, obtain required wax mould.

Further, the plastics core is tee bend tubular structure, and the material is silica gel, including integrated into one piece's first side pipe, middle part connecting pipe and second side pipe, first side pipe, middle part connecting pipe and the coaxial setting of second side pipe and internal diameter, external diameter homogeneous phase are the same, and integrated into one piece has the person in charge on the outer wall of middle part connecting pipe, be responsible for and be linked together with the inner chamber of middle part connecting pipe, the central line mutually perpendicular of the central line of being responsible for and middle part connecting pipe.

Furthermore, the product die cavity is a three-way pipe finished product die cavity, the injection molding die cavity comprises a left die cavity matched with the first side pipe, the cross section of the left die cavity is circular and coaxial with the first side pipe, and the cross section of the middle die cavity is circular and coaxial with the middle connecting pipe, and is a right die cavity matched with the second side pipe, the cross section of the right die cavity is circular and coaxial with the second side pipe, and is a main die cavity matched with the main pipe, and the cross section of the main die cavity is circular and coaxial with the main pipe.

Further, the mold core includes mold core A, mold core B and mold core C, first side pipe, middle part connecting pipe are run through to mold core A's one end, and the tip of mold core B offsets, mold core A and mold core B's outer end all extends to outside the die cavity of moulding plastics, and mold core C's one end is the arcwall face, and the butt is on mold core A's outer wall, and the other end extends to outside the die cavity of moulding plastics, and mold core A, mold core B and mold core C's nearly outer end integrated into one piece respectively has the sealing ring, the little clearance fit of sealing ring and the die cavity inner wall that corresponds.

Furthermore, the upper die and the lower die are connected together through bolt connecting pieces at four corners.

Compared with the prior art, the utility model discloses following beneficial effect has:

utilize the plastic as fired mold mould structure of mould inner core, take out the sub-assembly of plastics core, mold core A, mold core B, mold core C and wax matrix, disassemble the plastics core earlier, mold core A and mold core C, disassemble the plastics core at last (but the plastics core is distortion's flexible deformation spare, specifically be silica gel, it is convenient to take), acquire the inside wax matrix product that is the tee bend tubular structure of shoulder hole, recycle dewaxing method, accomplish the casting that corresponds the part, for traditional processing technology, need not the turning, or the turning of a small amount, product machining efficiency is high, alleviate operating personnel's intensity of labour simultaneously greatly.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings used in the detailed description or the prior art description will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a front view of the present invention;

FIG. 2 is an internal view of the present invention;

FIG. 3 is a cross-sectional view of a plastic core;

FIG. 4 is a structural view of a lower die;

fig. 5 is a sectional view of the product.

In the figure: 1. the mould comprises an upper mould 2, a lower mould 3, a plastic core 3.1, a first side pipe 3.2, a middle connecting pipe 3.3, a second side pipe 3.4, a main pipe 4, a mould core A5, a mould core B6, a mould core C7, a left mould cavity 8, a middle mould cavity 9, a right mould cavity 10, a main mould cavity 11, a product 12 and a wax injection hole

Detailed Description

The invention will be further described with reference to the accompanying drawings:

the present invention is further illustrated by the following specific examples, which are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Examples

As shown in fig. 1-5, the investment mold structure using plastic as a mold inner core comprises a lower mold 2 and an upper mold 1 located above the lower mold 2, wherein the upper mold 1 and the lower mold 2 are respectively provided with an upper half mold cavity, a lower half mold cavity, an upper wax injection half hole and a lower wax injection half hole, the upper half mold cavity and the lower half mold cavity are spliced to form an injection mold cavity between the upper mold 1 and the lower mold 2, the upper wax injection half hole and the lower wax injection half hole are spliced to form a wax injection hole 12 between the upper mold 1 and the lower mold 2, the injection mold cavity is provided with a mold core, the mold core is sleeved with an elastic plastic core 3, the plastic core 3 is a flexible deformable member capable of being distorted, a product mold cavity is arranged between the plastic core 3 and a side wall of the injection mold cavity, the wax injection hole 12 is communicated with the product mold cavity, a mold core assembly with the plastic core 3 is placed in the lower half mold cavity, the upper mold 1 and the lower mold 2 are buckled together, wax injection is completed through the wax injection hole 12, the wax injection is performed to form a wax mold in the product mold cavity, the wax mold core, the wax mold is taken out, and the required mold core 3 is obtained.

Preferably, the plastic core 3 is of a three-way tubular structure and made of silica gel, and comprises a first side tube 3.1, a middle connecting tube 3.2 and a second side tube 3.3 which are integrally formed, wherein the first side tube 3.1, the middle connecting tube 3.2 and the second side tube 3.3 are coaxially arranged, the inner diameter and the outer diameter of the first side tube are the same as those of the second side tube, a main tube 3.4 is integrally formed on the outer wall of the middle connecting tube 3.2, the main tube 3.4 is communicated with the inner cavity of the middle connecting tube 3.2, and the center line of the main tube 3.4 is perpendicular to the center line of the middle connecting tube 3.2;

preferably, the product cavity is a three-way pipe finished product cavity, the injection molding cavity comprises a left cavity 7 matched with the first side pipe 3.1, the section of the left cavity 7 is circular and coaxial with the first side pipe 3.1, the middle cavity 8 matched with the middle connecting pipe 3.2 is circular and coaxial with the middle connecting pipe 3.2, the section of the middle cavity 8 is circular and coaxial with the second side pipe 3.3, the section of the right cavity 9 is circular and coaxial with the second side pipe 3.3, the main cavity 10 matched with the main pipe 3.4 is provided, and the section of the main cavity 10 is circular and coaxial with the main pipe 3.4; the mold core comprises a mold core A4, a mold core B5 and a mold core C6, one end of the mold core A4 penetrates through the first side pipe 3.1, the middle connecting pipe 3.2 abuts against the end part of the mold core B5, the outer ends of the mold core A4 and the mold core B5 extend out of the injection molding cavity, one end of the mold core C6 is an arc-shaped surface and abuts against the outer wall of the mold core A4, the other end of the mold core A4 and the mold core B5 extends out of the injection molding cavity, sealing rings are integrally formed at the near outer ends of the mold core A4, the mold core B5 and the mold core C6 respectively, and the sealing rings are in small clearance fit with the corresponding inner walls of the cavity;

preferably, the upper die 1 and the lower die 2 are connected together by four-corner bolt connectors.

The utility model discloses an application steps: firstly assembling the plastic core 3, the mold core A4, the mold core B5 and the mold core C6 together, placing the plastic core 3, the mold core A4, the mold core B5 and the mold core C6 on the upper surface of the lower mold 2, then buckling the upper mold 1 on the lower mold 2, fastening the upper mold through bolts, completing wax injection through the wax injection holes 12, forming a wax mold in a product cavity by wax injection, detaching the upper mold 1, taking out the combined piece of the plastic core 3, the mold core A4, the mold core B5, the mold core C6 and the wax mold, detaching the plastic core 3 (the plastic core is a flexible deformable piece capable of being distorted, particularly silica gel, and is convenient to adopt), obtaining a wax mold product 11 with a three-way tubular structure with a stepped hole inside, and completing casting of corresponding parts by using a dewaxing method without turning or small turning, so that the product processing efficiency is high, and the labor intensity of operators is greatly reduced.

The foregoing shows and describes the basic principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

The present invention is not described in detail, but is known to those skilled in the art.

Claims

1. The utility model provides an utilize fired mold structure of plastic as mould inner core which characterized in that: including lower mould (2) and last mould (1) that is located lower mould (2) top, go up mould (1) and lower mould (2) and have first die cavity, lower half die cavity, upper wax half hole, lower floor and penetrate wax half hole respectively, first die cavity, lower half die cavity amalgamation go up and form the die cavity of moulding plastics between mould (1) and lower mould (2), the wax half hole is penetrated on the upper strata, the wax half hole amalgamation is penetrated to the lower floor and is in go up and form between mould (1) and lower mould (2) and penetrate wax hole (12), the mould core has in the die cavity of moulding plastics, the cover is equipped with elastic plastics core (3) on the mould core, and plastics core (3) are the flexible deformation spare that can warp, be the product die cavity between plastics core (3) and the die cavity lateral wall of moulding plastics, penetrate wax hole (12) and be linked together with the product die cavity.

2. The investment mold structure using plastic as a mold core according to claim 1, wherein: plastics core (3) are tee bend tubular structure, and the material is silica gel, including integrated into one piece's first side pipe (3.1), middle part connecting pipe (3.2) and second side pipe (3.3), first side pipe (3.1), middle part connecting pipe (3.2) and second side pipe (3.3) coaxial arrangement and internal diameter, external diameter homogeneous phase are the same, and integrated into one piece has on the outer wall of middle part connecting pipe (3.2) and is responsible for (3.4), be responsible for (3.4) and the inner chamber of middle part connecting pipe (3.2) and be linked together, the central line mutually perpendicular of the central line of being responsible for (3.4) and middle part connecting pipe (3.2).

3. The investment mold structure using plastic as the mold core according to claim 2, wherein: the product die cavity is three-way pipe finished product die cavity, the die cavity of moulding plastics includes left die cavity (7) with first side pipe (3.1) complex, left die cavity (7) cross-section is circular and first side pipe (3.1) coaxial, with middle part connecting pipe (3.2) complex middle die cavity (8), middle die cavity (8) cross-section is circular and middle part connecting pipe (3.2) coaxial, with second side pipe (3.3) complex right side die cavity (9), right side die cavity (9) cross-section is circular and second side pipe (3.3) coaxial, with main die cavity (10) of being responsible for (3.4) complex, main die cavity (10) cross-section is circular and is responsible for (3.4) coaxial.

4. The investment mold structure utilizing plastic as a mold core according to claim 3, wherein: the mold core includes mold core A (4), mold core B (5) and mold core C (6), the one end of mold core A (4) runs through the tip of first side pipe (3.1), middle part connecting pipe (3.2) and mold core B (5) and offsets, the outer end of mold core A (4) and mold core B (5) all extends to outside the die cavity of moulding plastics, and the one end of mold core C (6) is the arcwall face, and the butt is on the outer wall of mold core A (4), and outside the other end extended to the die cavity of moulding plastics, the nearly outer end difference integrated into one piece of mold core A (4), mold core B (5) and mold core C (6) has the sealing ring, the little clearance fit of the die cavity inner wall that the sealing ring and correspond.

5. The investment mold structure utilizing plastic as a mold core according to claim 4, wherein: the upper die (1) and the lower die (2) are connected together through bolt connecting pieces at four corners.