A dry powder product pressing mold

Abstract

The present invention relates to a dry powder product pressing mold, the pressing mold comprises an upper mold, an outer lower mold, and a core mold. When it is used, the core mold is placed in the outer lower mold and moves up and down, and the upper mold is placed above the outer lower mold and the core mold and moves up and down; at the feeding position, that is, the upper end face of the core mold is flush with the upper end face of the outer lower mold, and a feeding cavity is formed between the core mold and the outer lower mold; at the molding position, that is, the upper mold, the outer lower mold, and the core mold are molded together, and a mold cavity is formed between the upper mold, the outer lower mold, and the core mold; an outer half groove is arranged on the outer side of the core mold, and an inner half groove is arranged on the inner side of the outer lower mold. The mold cavity is surrounded by the lower end face of the upper mold, the outer half groove, and the inner half groove. At the feeding position, the outer half groove and the inner half groove are dislocated up and down; during the mold closing process of the upper mold, the outer lower mold, and the core mold, the upper mold moves downward relatively, enters the feeding cavity and seals, and then moves downward synchronously with the core mold or the outer lower mold until the upper mold, the outer lower mold, and the core mold are molded together. The arc of the upper end face of the product can be pressed out at one time, and the pressed product is qualified.

Description

Technical Field

[0001] The invention relates to a dry powder product pressing technology, in particular to a dry powder product pressing die. Background Art

[0002] Our company is mainly engaged in the manufacture and development of dry powder hydraulic presses. For the pressing of a special-shaped salt core, its hole is not a perfect circle, and the upper end face is an arc. Traditionally, for products with an arc upper end face, the upper end face is often pressed into a plane first, and then machined into an arc. However, the hole of this product is not a perfect circle, so the above method cannot be used. Can the upper end face of the product be directly pressed into an arc? The existing technology cannot achieve this.

[0003] Prior art, such as Patent: 201110418501.8 Salt core pressing mold and method for manufacturing salt core and the manufactured salt core, discloses that the lower end face of the upper mold is an arc surface, claiming that the arc of the upper end face can be pressed out at one time. Although this is true in theory, it is limited to theory and cannot be realized in practice. The lower end face of the upper mold is an arc surface, which will inevitably lead to uneven force on both sides and the middle of the upper mold during the pressing process, and the upper mold cannot be pressed into shape. Even if it can be pressed out, the pressed product is only in form, and its upper end face is loose, fragile, and unqualified. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a dry powder product pressing mold.

[0005] Technical method of the present invention:

[0006] A dry powder product pressing mold, the pressing mold comprises an upper mold, an outer lower mold, and a core mold. When the pressing mold is used, the core mold is placed in the outer lower mold and moves up and down, and the upper mold is placed above the outer lower mold and the core mold and moves up and down; at the feeding position, that is, the upper end surface of the core mold is flush with the upper end surface of the outer lower mold, and a feeding cavity is formed between the core mold and the outer lower mold; at the molding position, that is, the upper mold, the outer lower mold, and the core mold are molded together, and a mold cavity is formed between the upper mold, the outer lower mold, and the core mold; an outer half groove is arranged on the outer side surface of the core mold, and an inner half groove is arranged on the inner side surface of the outer lower mold, and the mold cavity is surrounded by the lower end surface of the upper mold, the outer half groove, and the inner half groove; at the feeding position, the outer half groove and the inner half groove are staggered up and down;

[0007] During the closing process of the upper mold, the outer lower mold and the core mold, the upper mold moves downward relatively, enters the feeding cavity and seals it, and then moves downward relatively synchronously with the core mold or the outer lower mold until the upper mold, the outer lower mold and the core mold are closed.

[0008] The lower end surface of the dry powder product is provided with a plurality of convex heads; the pressing mold further comprises a plurality of core rods, which are placed in the outer lower mold or in the core mold or between the outer lower mold and the core mold and move up and down when in use; in the feeding position, that is, the core rod is located at the lower limit position, a feeding height is formed between the core rod and the outer lower mold and / or the core mold, and in the molding position, that is, the core rod is located at the upper limit position, a convex head cavity is formed between the core rod and the outer lower mold and / or the core mold, and the convex head cavity is a part of the mold cavity.

[0009] A dry powder product pressing mold frame is installed on a hydraulic press, and a dry powder product pressing mold is installed on the dry powder product pressing mold; it is characterized in that the dry powder product pressing mold is the above-mentioned dry powder product pressing mold.

[0010] A strong floating push rod is installed in the upper mold;

[0011] After the upper mold moves downward relatively into the feeding cavity and seals it, the strong floating push rod pushes and forces the core mold to move downward synchronously until the upper mold, the outer lower mold and the core mold are closed.

[0012] The strong floating push rod is threadedly connected with the upper die.

[0013] A dry powder product pressing process, using the above dry powder product pressing mold to press the dry powder product, the specific steps are as follows:

[0014] 1) The outer lower mold is fixed, and the core mold moves up or down until the upper end surface of the core mold is flush with the upper end surface of the outer lower mold, that is, the feeding position, and a feeding cavity is formed between the core mold and the outer lower mold;

[0015] 2) Add dry powder into the feeding chamber, fill it up and scrape it flat;

[0016] 3) When the upper die moves down to the feeding cavity opening, the feeding cavity opening is closed;

[0017] 4) The upper mold continues to move downward, and the core mold moves downward synchronously with it until the three molds are closed and the pressure is maintained for a period of time to obtain a dry powder product;

[0018] 5) The upper mold moves upward, and after the upper mold is reset, the core mold moves upward to eject the dry powder product on it. After ejecting the product from the mold, it moves downward to the feeding position.

[0019] A dry powder product pressing process, using the above dry powder product pressing mold to press the dry powder product with a plurality of convex heads on the lower end surface, the specific steps are as follows:

[0020] 1) The outer lower mold is fixed, and the core mold moves up or down until the upper end surface of the core mold is flush with the upper end surface of the outer lower mold, that is, the feeding position, and a feeding cavity is formed between the core mold and the outer lower mold. At this time, the core rod is at its lower limit position;

[0021] 2) Add dry powder into the feeding chamber, fill it up and scrape it flat;

[0022] 3) When the upper die moves down to the feeding cavity opening, the feeding cavity opening is closed;

[0023] 4) The upper mold continues to move downward, and the core mold moves downward synchronously with it until the three molds are closed. After the three molds are closed, the core rod moves upward to the upper limit, and the pressure is maintained for a period of time to obtain a dry powder product with several convex heads on the lower end surface;

[0024] 5) The upper mold moves upward, and after the upper mold is reset, the core mold and the core rod move upward synchronously to eject the dry powder product on it. After ejecting the mold, it moves downward to the feeding position. At the same time, the core rod moves downward to the lower limit.

[0025] In step 4), the upper die is slowly compressed to exhaust air during its downward movement.

[0026] The advantages of the present invention are reasonable design and simple structure. When pressing a product with an arc upper end face, the lower end face of the upper die is designed to be an arc. When pressing, the up and down movement of the core die is utilized to change the distribution of powder in the feeding cavity. Before the upper die applies pressure, the powder is filled into the lower end face of the upper die. In this way, when the upper die applies pressure, the forces on both sides and the middle are uniform, thereby being able to press out the arc of the upper end face of the product at one time, and the pressed product is qualified. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the dry powder product pressing mold (feeding position).

[0028] Figure 2 It is a schematic diagram of the structure of the dry powder product pressing mold (forming position).

[0029] Figure 3 It is a schematic diagram of the mold structure for pressing dry powder products.

[0030] In the figure, the upper mold 1-1, the outer lower mold 1-2, the outer half groove 1-2-1, the core mold 1-3, the inner half groove 1-3-1, the core rod 1-4, the upper mold plate 2-1, the female mold plate 2-2, the floating mold plate 2-3, the lower mold plate 2-4, the upper mold seat 2-5, the female mold hole 2-6, the core mold seat 2-7, the core rod seat 2-8, and the strong floating push rod 2-9. DETAILED DESCRIPTION

[0031] like Figure 1-2As shown, a dry powder product pressing mold, the pressing mold includes an upper mold 1-1, an outer lower mold 1-2, and a core mold 1-3. When it is used, the core mold 1-1 is placed in the outer lower mold 1-2 and moves up and down, and the upper mold 1-1 is placed above the outer lower mold 1-2 and the core mold 1-3 and moves up and down; at the feeding position, that is, the upper end surface of the core mold 1-1 is flush with the upper end surface of the outer lower mold 1-2, and a feeding cavity is formed between the core mold 1-1 and the outer lower mold 1-2; at the molding position, that is, the upper mold 1-1, the outer lower mold 1-2, and the core mold 1-3 are closed, and a mold cavity is formed between the upper mold 1-1, the outer lower mold 1-2, and the core mold 1-3; an outer half groove 1-3-1 is provided on the outer side surface of the core mold 1-3, and an inner half groove 1-2-1 is provided on the inner side surface of the outer lower mold 1-2, and the mold cavity is surrounded by the lower end surface of the upper mold 1-1, the outer half groove 1-3-1, and the inner half groove 1-2-1 The present invention relates to a method for manufacturing a dry powder product; in the feeding position, the outer half groove 1-3-1 and the inner half groove 1-2-1 are misaligned up and down; during the closing process of the upper mold 1-1, the outer lower mold 1-2 and the core mold 1-3, the upper mold 1-1 moves downward, enters the feeding cavity and seals it, and then moves downward synchronously with the core mold 1-3 until the upper mold 1-1, the outer lower mold 1-2 and the core mold 1-3 are closed; the lower end surface of the dry powder product has a plurality of convex heads; the pressing mold also includes a plurality of core rods 1-4, when in use, the core rod 1-4 is placed between the outer lower mold 1-2 and the core mold 1-3, and moves up and down; in the feeding position, that is, the core rod 1-4 is located at the lower limit position, and a feeding height is formed between the core rod 1-4, the outer lower mold 1-2 and the core mold 1-3, and in the molding position, that is, the core rod 1-4 is located at the upper limit position, and a convex head cavity is formed between the core rod 1-4, the outer lower mold 1-2 and the core mold 1-3, and the convex head cavity is a part of the mold cavity.

[0032] like Figure 3 As shown, a dry powder product pressing mold frame, the dry powder pressing mold frame includes an upper mold plate 2-1, a female mold plate 2-2, a floating mold plate 2-3, a lower mold plate 2-4, an upper mold base 2-5, a female mold hole 2-6, a core mold push rod 2-7, and a core rod base 2-8. The upper mold plate 2-1, the female mold plate 2-2, the lower mold plate 2-4, and the core rod base 2-8 are distributed and installed on a hydraulic press, wherein the female mold plate 2-2 is fixed, the upper mold plate 2-1, the lower mold plate 2-4, and the core rod base 2-8 are driven by the hydraulic cylinders of the hydraulic press to move up and down, the floating mold plate 2-3 is installed on the lower mold plate 2-4, and the upper mold base 2-5 is installed on the upper mold plate 2-5. On the template 2-1, the core mold push rod 2-7 is installed on the floating template 2-3, the upper mold 1-1 is installed on the upper mold base 2-5, the outer lower mold 1-2 is installed in the female mold hole 2-6, the core mold 1-3 is installed on the core mold push rod 2-7, and each core rod 1-4 is installed on the core rod base 2-8; a strong floating push rod 2-9 is installed in the upper mold 1-1; after the upper mold 1-1 descends into the feeding cavity and seals it, the strong floating push rod 2-11 pushes and forces the core mold 1-3 to descend synchronously until the upper mold 1-1, the outer lower mold 1-2, and the core mold 1-3 are closed; the strong floating push rod 2-9 is threadedly connected to the upper mold 1-1.

[0033] A dry powder product pressing process, using the above dry powder product pressing mold to press the dry powder product with a plurality of convex heads on the lower end surface, the specific steps are as follows:

[0034] 1) The outer lower mold is fixed, and the core mold moves up or down until the upper end surface of the core mold is flush with the upper end surface of the outer lower mold, that is, the feeding position, and a feeding cavity is formed between the core mold and the outer lower mold. At this time, the core rod is at its lower limit position;

[0035] 2) Add dry powder into the feeding chamber, fill it up and scrape it flat;

[0036] 3) When the upper die moves down to the feeding cavity opening, the feeding cavity opening is closed;

[0037] 4) The upper mold continues to move downward, and the core mold moves downward synchronously with it until the three molds are closed. After the three molds are closed, the core rod moves upward to the upper limit, and the pressure is maintained for a period of time to obtain a dry powder product with several convex heads on the lower end surface;

[0038] 5) The upper mold moves upward, and after the upper mold is reset, the core mold and the core rod move upward synchronously to eject the dry powder product on it. After ejecting the mold, it moves downward to the feeding position. At the same time, the core rod moves downward to the lower limit.

[0039] In step 4), the upper die is slowly compressed to exhaust air during its downward movement.

[0040] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A dry powder product pressing mold, the pressing mold comprises an upper mold, an outer lower mold, and a core mold. When it is used, the core mold is placed in the outer lower mold and moves up and down, and the upper mold is placed above the outer lower mold and the core mold and moves up and down; in the feeding position, that is, the upper end surface of the core mold is flush with the upper end surface of the outer lower mold, and a feeding cavity is formed between the core mold and the outer lower mold; in the molding position, that is, the upper mold, the outer lower mold, and the core mold are molded together, and a mold cavity is formed between the upper mold, the outer lower mold, and the core mold; an outer half groove is provided on the outer side surface of the core mold, and an inner half groove is provided on the inner side surface of the outer lower mold, and the mold cavity is surrounded by the lower end surface of the upper mold, the outer half groove, and the inner half groove; it is characterized in that At the feeding position, the outer half groove and the inner half groove are offset up and down; during the closing process of the upper mold, the outer lower mold and the core mold, the upper mold moves downward relatively, enters the feeding cavity and seals it, and then moves downward relatively synchronously with the core mold or the outer lower mold until the upper mold, the outer lower mold and the core mold are closed; The dry powder product pressing mold presses the dry powder product, and the specific steps are as follows: 1) The outer lower mold is fixed, and the core mold moves up or down until the upper end surface of the core mold is flush with the upper end surface of the outer lower mold, that is, the feeding position, and a feeding cavity is formed between the core mold and the outer lower mold; 2) Add dry powder into the feeding chamber, fill it up and scrape it flat; 3) When the upper die moves down to the feeding cavity opening, the feeding cavity opening is closed; 4) The upper mold continues to move downward, and the core mold moves downward synchronously with it until the three molds are closed and the pressure is maintained for a period of time to obtain a dry powder product; 5) The upper mold moves upward, and after the upper mold is reset, the core mold moves upward to eject the dry powder product on it. After ejecting the product from the mold, it moves downward to the feeding position.

2. A dry powder product pressing mold, the pressing mold comprises an upper mold, an outer lower mold, and a core mold. When it is used, the core mold is placed in the outer lower mold and moves up and down, and the upper mold is placed above the outer lower mold and the core mold and moves up and down; in the feeding position, that is, the upper end surface of the core mold is flush with the upper end surface of the outer lower mold, and a feeding cavity is formed between the core mold and the outer lower mold; in the molding position, that is, the upper mold, the outer lower mold, and the core mold are molded together, and a mold cavity is formed between the upper mold, the outer lower mold, and the core mold; an outer half groove is provided on the outer side surface of the core mold, and an inner half groove is provided on the inner side surface of the outer lower mold, and the mold cavity is surrounded by the lower end surface of the upper mold, the outer half groove, and the inner half groove; it is characterized in that At the feeding position, the outer half groove and the inner half groove are misaligned up and down; during the process of the upper mold, the outer lower mold and the core mold being molded together, the upper mold moves downward relatively, enters the feeding cavity and is sealed, and then moves downward synchronously with the core mold or the outer lower mold until the upper mold, the outer lower mold and the core mold are molded together; the lower end surface of the dry powder product has a plurality of convex heads; the pressing mold also includes a plurality of core rods, and when in use, the core rod is placed in the outer lower mold or in the core mold or between the outer lower mold and the core mold, and moves up and down; at the feeding position, that is, the core rod is located at the lower limit position, a feeding height is formed between the core rod and the outer lower mold and / or the core mold, and at the molding position, that is, the core rod is located at the upper limit position, a convex head cavity is formed between the core rod and the outer lower mold and / or the core mold, and the convex head cavity is a part of the mold cavity; The specific steps are as follows: 1) The outer lower mold is fixed, and the core mold moves up or down until the upper end surface of the core mold is flush with the upper end surface of the outer lower mold, that is, the feeding position, and a feeding cavity is formed between the core mold and the outer lower mold. At this time, the core rod is at its lower limit position; 2) Add dry powder into the feeding chamber, fill it up and scrape it flat; 3) When the upper die moves down to the feeding cavity opening, the feeding cavity opening is closed; 4) The upper mold continues to move downward, and the core mold moves downward synchronously with it until the three molds are closed. After the three molds are closed, the core rod moves upward to the upper limit, and the pressure is maintained for a period of time to obtain a dry powder product with several convex heads on the lower end surface; 5) The upper mold moves upward, and after the upper mold is reset, the core mold and the core rod move upward synchronously to eject the dry powder product on it. After ejecting the mold, it moves downward to the feeding position. At the same time, the core rod moves downward to the lower limit.

3. A dry powder product pressing die according to claim 1 or 2, characterized in that: In step 4), the upper die is slowly compressed to exhaust air during its downward movement.

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