CN110406033A - A kind of impeller mold - Google Patents

Abstract

The invention discloses an impeller mould, which comprises a pressing die, a bottom die and a die sleeve. A molding cavity is formed on both sides of the die core, an impeller insert inserted into a slot is arranged in the molding cavity, and a pin die is arranged in the pressing die; the bottom Between the mold and the die sleeve, there is a plug piece filled in the flow channel of the impeller; the plug piece includes an upper plug piece and a lower plug piece connected up and down, and a number of compression springs connecting the upper plug piece and the lower plug piece are arranged between the two support plates. ; In the present invention, the plug pieces are arranged in a layered structure connected to each other, the upper plug piece and the lower plug piece are connected by a compression spring, and the support plate and the L-shaped slider are used to limit each other, so that the mold closing is strong and can be opened at the same time. When molding, it has the effect of ejecting the finished product, which is convenient for demoulding; by setting a slot on the side of the mold core that matches the impeller insert, it is convenient to position the impeller insert, so that the impeller insert is better wrapped in the blade Form an integrated structure; at the same time, the pin mold set in the die is convenient for the insertion of the extrusion pin, and it is convenient for the exhaust when the casting is pressed.

Description

A kind of impeller mold

technical field

The invention relates to the filling field, in particular to an impeller mold.

Background technique

Centrifugal pumps are widely used because of their large liquid delivery capacity, uniform and stable flow rate, convenient use and low cost. The types of materials used in the manufacture of centrifugal pumps include cast iron, stainless steel, ceramics, various plastics, and more. For transporting highly corrosive acids, alkalis, and salt media, fluoroplastics or fluoroplastic alloys are mainly used. Fluoroplastic centrifugal pumps broaden the application fields of centrifugal pumps compared with metal centrifugal pumps, but the strength of plastic materials is much weaker than that of metals, especially the impeller, the heart part of pump parts. The strength of this part directly affects the pump. The useful life of the product.

In the prior art, the design of the inner plug of the impeller mold is divided into blocks as a whole. Since the flow channel is in the form of wide inside and narrow outside, it is easy to cause deformation at the outlet of the impeller flow channel when the impeller is sintered and demolded. It also affects the tightness of mold clamping during molding. At the same time, since the impeller blades are provided with metal inserts, it is difficult to locate them, resulting in poor cladding of the metal inserts, which affects the production quality.

Contents of the invention

The purpose of the present invention is to provide an impeller mold to solve the problems raised in the background art above.

In order to achieve the above object, the present invention provides the following technical solutions: an impeller mold, including a die, a bottom die and a die sleeve, a mold core is formed at the center of the press die and the bottom die, and several slots are arranged on the side of the die core. Forming cavities are formed on both sides, the impeller insert inserted into the slot is arranged in the forming cavity, the pin mold connected with the forming cavity is arranged in the pressing mold; the plug seat is embedded in the middle of the bottom mold, and the There is a plug filled in the impeller flow channel; the plug includes an upper plug and a lower plug that are connected up and down, and the two ends of the lower plug extend upward to form a support plate, and the opposite surfaces of the two support plates are respectively provided with slides with opposite openings. groove, the bottom of the upper plug is connected with an L-shaped slide block inserted into the chute, and some compression springs connecting the upper plug and the lower plug are arranged between the two support plates.

Preferably, mounting holes are arranged symmetrically on both sides of the top of the die sleeve, and the die sleeve and the side wall of the die are fixed together by screws passing through the mounting holes.

Preferably, ear plates are symmetrically arranged on both sides of the bottom of the mold sleeve, and the bottom surface of the ear plate is provided with an indented positioning groove, and the top of the bottom mold is correspondingly provided with a positioning protrusion inserted into the positioning groove, and the ear plate of the mold sleeve is in contact with the positioning groove. The bottom molds are fixedly connected by screws.

Preferably, the slot is formed by closing the mold core of the press mold and the mold core of the bottom mold, and is divided into upper and lower parts with opposite openings.

Preferably, there are several plug pieces, and each plug piece is located in the impeller flow channel to form a circular ring, and the central hole wall of the circular ring with a taper fits with the plug seat, and each plug piece outside the impeller flow channel The tail is set as a dovetail, and the dovetail is provided with bolt holes for fixing the plugs on the bottom mold, and the thickness of the plugs is not greater than the outlet height of the impeller flow channel.

Compared with prior art, the beneficial effect of the present invention is:

1. In the present invention, the plug pieces are arranged as a layered structure connected to each other, including an upper plug piece and a lower plug piece, which are connected by a compression spring, and are mutually limited by a support plate and an L-shaped slider. When closing the mold, under the action of the compression spring, the forming stability of the impeller is good, and the tightness of the mold closing is strong. At the same time, when the mold is opened, the upper plug and the lower plug are separated under the action of the compression spring, which has the effect of ejecting the finished product. Function, easy to demould.

2. In the present invention, a slot matching the impeller insert is provided on the side of the mold core, which facilitates the positioning of the impeller insert, so that the impeller insert is better wrapped in the blade to form an integrated structure; at the same time, a The unique pin mold is convenient for the insertion of extrusion pins, and it is convenient for venting when castings are pressed.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is the specific structural representation of die sleeve of the present invention;

Fig. 3 is the concrete structure schematic diagram of plug sheet of the present invention;

Fig. 4 is a schematic diagram of the specific structure of the plug piece and the dovetail piece of the present invention.

In the figure: 1. Compression mold; 2. Bottom mold; 3. Mold sleeve; 4. Core; 5. Mounting hole; 6. Ear plate; 7. Positioning groove; 8. Positioning bump; 9. Slot; 10, impeller insert; 11, forming cavity; 12, pin mold; 13, plug seat; 14, plug; 15, upper plug; 16, lower plug; 17, support plate; 18, chute; 19 , L-shaped slider; 20, compression spring; 21, dovetail piece; 22, bolt hole.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal" etc. is based on the orientation or positional relationship shown in the drawings, and is only In order to facilitate the description of the present invention and simplify the description, it does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation", "installation", "connection" and "connection" should be understood in a broad sense, for example, it may be a fixed connection, It can also be 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 intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

Please refer to Fig. 1-4, the present invention provides a kind of technical scheme: a kind of impeller mold, comprises die 1, bottom die 2 and die sleeve 3, die core 4 is formed at the center of die 1 and bottom die 2, die core 4 A number of slots 9 are arranged around the side, and molding cavities 11 are formed on both sides of the mold core 4, and impeller inserts 10 inserted into the slots 9 are arranged in the molding cavities 11, and pin molds communicating with the molding cavities 11 are arranged in the die 1 12. A plug seat 13 is embedded in the middle of the bottom mold 2, and a plug piece 14 filled in the flow channel of the impeller is provided between the bottom mold 2 and the mold case 3; the plug piece 14 includes an upper plug piece 15 and a lower plug connected up and down 16, the two ends of the lower plug 16 extend upwards to form a support plate 17, the opposite surfaces of the two support plates 17 are respectively provided with chute 18 with the opening opposite, and the bottom of the upper plug 15 is connected with an L-shaped slider inserted into the chute 18 19. Several compression springs 20 connecting the upper plug piece 15 and the lower plug piece 16 are arranged between the two support plates 17 .

Further, mounting holes 5 are symmetrically arranged on both sides of the top of the die case 3 , and the die case 3 and the side wall of the die 1 are fixed together by screws passing through the mounting holes 5 .

Further, the two sides of the bottom of the mold cover 3 are symmetrically provided with ear plates 6, the bottom surface of the ear plate 6 is provided with an indented positioning groove 7, and the top of the bottom mold 2 is correspondingly provided with a positioning protrusion 8 inserted into the positioning groove 7 , The ear plate 6 of the mold cover 3 and the bottom mold 2 are fixedly connected by screws, which is convenient for positioning during mold closing and ensures the stability of mold closing.

Further, the slot 9 is formed by closing the mold core 4 of the die 1 and the mold core 4 of the bottom mold 2, and is divided into upper and lower parts with opposite openings, which is convenient for demoulding when the mold is opened.

Further, there are several plug pieces 14, and each plug piece 14 is in the flow channel of the impeller to form a circular ring. The tail of the plug piece 14 is set as a dovetail piece 21, and the dovetail piece 21 is provided with a bolt hole 22 for fixing each plug piece 14 on the bottom mold 2, and the thickness of the plug piece 14 is not greater than the outlet height of the impeller flow channel.

In the present invention, the plug pieces are arranged in a layered structure connected to each other, including an upper plug piece and a lower plug piece, the upper plug piece and the lower plug piece are connected by a compression spring, and the support plate and the L-shaped slider are used to limit each other. When closing the mold, under the action of the compression spring, the forming stability of the impeller is good, and the tightness of the mold closing is strong. At the same time, when the mold is opened, the upper plug and the lower plug are separated under the action of the compression spring, which has an ejection effect on the finished product. Easy to demould. The slots matching the impeller inserts are provided on the side of the mold core to facilitate the positioning of the impeller inserts, so that the impeller inserts are better wrapped in the blades to form an integrated structure; at the same time, the pin molds set in the die are convenient The insertion of extrusion pins is convenient for venting when castings are pressed.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (5)

1. a kind of impeller mould, is characterized in that, comprises die (1), bottom die (2) and die cover (3), die core (4) is formed at the center of die (1) and bottom die (2), The side of the mold core (4) is provided with several slots (9) around the side, forming cavities (11) are formed on both sides of the mold core (4), and the impeller inserts ( 10), the die (1) is provided with a pin die (12) communicating with the molding cavity (11); the middle part of the bottom die (2) is embedded with a plug seat (13), and the bottom die (2) and the die sleeve (3 ) is provided with a plug (14) filled in the impeller flow channel; the plug (14) includes an upper plug (15) and a lower plug (16) connected up and down, and the two ends of the lower plug (16) Extend upwards to form a support plate (17), the opposite surfaces of the two support plates (17) are respectively provided with sliding grooves (18) with opposite openings, and the bottom of the upper plug piece (15) is connected with an L-shaped sliding groove inserted into the sliding groove (18). Block (19), a number of compression springs (20) connecting the upper plug piece (15) and the lower plug piece (16) are arranged between the two support plates (17). 2. An impeller mold according to claim 1, characterized in that: the two sides of the top of the mold cover (3) are symmetrically provided with mounting holes (5), and the mold cover (3) and the side wall of the die (1) They are fixed together by screws passing through the mounting holes (5). 3. An impeller mold according to claim 1, characterized in that: ear plates (6) are symmetrically arranged on both sides of the bottom of the mold sleeve (3), and the bottom surface of the ear plate (6) is provided with indented positioning recesses Groove (7), the top of the bottom mold (2) is correspondingly provided with a positioning protrusion (8) inserted into the positioning groove (7), and the ear plate (6) of the mold cover (3) and the bottom mold (2) pass through Screw secure connection. 4. An impeller mold according to claim 1, characterized in that the slot (9) is closed by the core (4) of the die (1) and the core (4) of the bottom die (2) Formed, divided into upper and lower parts with opposite openings. 5. A kind of impeller mold according to claim 1, characterized in that: said plug pieces (14) are set to several, and each plug piece (14) is in the flow channel of the impeller to form a circular ring, and the circular ring has The tapered central hole wall fits with the plug seat (13), and the tail of each plug (14) outside the impeller flow channel is set as a dovetail (21), and the dovetail (21) is provided with a bolt hole (22) for When each plug piece (14) is fixedly connected on the bottom mold (2), the thickness of the plug piece (14) is not greater than the outlet height of the impeller flow channel.