CN215237595U

CN215237595U - Lost foam casting is with closing die device

Info

Publication number: CN215237595U
Application number: CN202121341786.5U
Authority: CN
Inventors: 周健民; 潘畅; 沈钦鹏
Original assignee: Wuhan Julu Technology Co ltd
Current assignee: Wuhan Julu Technology Co ltd
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2021-12-21
Anticipated expiration: 2031-06-16

Abstract

The utility model discloses a mold closing device for lost foam casting, which relates to the technical field of white mold group in lost foam casting, and comprises a lower tooling plate, wherein a second cavity with an upward opening is arranged in the lower tooling plate, and the second cavity is used for placing a lower mold; the upper tooling plate is positioned above the lower tooling plate and can move up and down relative to the lower tooling plate; the upper tooling plate is provided with a first concave cavity with a downward opening and used for fixing the upper die; the upper tool plate is close to the lower tool plate so that the upper die and the lower die are matched; the upper tooling plate can move relative to the lower tooling plate, so that the design of automatic die assembly is realized, the traditional manual die assembly is replaced, the labor force is liberated, and the yield of the lost foam casting process is improved.

Description

Lost foam casting is with closing die device

Technical Field

The utility model relates to a white mould group type technical field specifically is a MOLD CLAMPING APPARATUS is used in lost foam casting among lost foam casting.

Background

The lost foam casting is to make white mould with EPS or STMMA copolymer, the white mould has the characteristics of low density, low strength and low tensile strength, the white mould is buried in moulding sand, and after vacuumizing and compacting, molten metal is poured into the white mould from a pouring cup.

The lost foam is vaporized to form a cavity when meeting molten metal, and the molten metal is filled into the cavity and solidified to form a casting; at present, a complex white mold is difficult to be completely foamed and formed by a forming machine at one time, so that at least two white molds used in the lost foam casting technology form the lost foam.

Before casting, the white mould is required to be bonded into a whole, so that the bonding surface is required to be subjected to gluing, mould assembly and seam filling; most of the existing gluing and die assembly modes are manual operation, the manual operation efficiency is low, and in addition, instability and nonuniformity of manual die assembly have great influence on cast castings.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, the utility model provides a new compound die device through carrying out structural design to it and reaching the state of automatic compound die to replace manual operation, improve the precision of compound die.

The utility model provides a concrete scheme as follows:

a mold closing device for lost foam casting comprises

The lower tool plate is internally provided with a second concave cavity with an upward opening, and the second concave cavity is used for placing a lower die;

the upper tooling plate is positioned above the lower tooling plate and can move up and down relative to the lower tooling plate; the upper tooling plate is provided with a first concave cavity with a downward opening and used for fixing the upper die;

and the upper tool plate is close to the lower tool plate so that the upper die and the lower die are matched.

Furthermore, a limiting frame is arranged in the second cavity and matched with the notch in the lower die, and the lower die is positioned on the lower tooling plate through the limiting frame.

Furthermore, the limiting frame is of an annular structure, and a plurality of arc-shaped concave parts are arranged on one side of the limiting frame.

Furthermore, a guide mechanism is further arranged between the lower tooling plate and the upper tooling plate, and the lower tooling plate and the upper tooling plate enable the upper die and the lower die to be accurately matched through the guide mechanism.

Further, the guide mechanism comprises a guide pin and a guide post with a guide hole, and the upper tool plate is close to the lower tool plate so that the guide pin is inserted into and guided by the guide post.

Furthermore, one end of the guide pin, facing the guide post, is provided with a guide protrusion, and the diameter of the guide protrusion is smaller than that of the guide hole.

Furthermore, the guide mechanism further comprises a lower bearing plate and an upper top plate, the lower tooling plate is fixed on the upper end face of the lower bearing plate, and the guide pins are fixedly distributed at four corners of the lower bearing plate; the upper tooling plate is fixed on the lower end face of the upper top plate, and the guide posts are fixedly distributed on the upper top plate and are arranged in one-to-one correspondence with the guide pins.

Furthermore, the upper tooling plate is fixedly connected with the upper top plate through a fixing plate.

Furthermore, an elastic buffer mechanism is arranged between the fixing plate and the upper top plate.

Furthermore, the elastic buffer mechanism comprises a pin column and a spring sleeved on the pin column, the pin column is fixed on the fixed plate, and two ends of the spring are respectively abutted against the fixed plate and the upper top plate.

The beneficial effect that adopts this technical scheme to reach does:

1. the upper die and the lower die are stably installed by redesigning the structure of the device and designing the corresponding upper tooling plate and lower tooling plate aiming at the upper die and the lower die; and set up the cavity (first cavity, second cavity) in last frock board and lower mounting panel respectively in order to further guarantee the stability of upper and lower mould installation, have very big promotion effect to final automatic compound die precision.

2. The upper tooling plate can move relative to the lower tooling plate, so that the design of automatic die assembly is realized, the traditional manual die assembly is replaced, the labor force is liberated, and the yield of the lost foam casting process is improved.

Drawings

Fig. 1 is a plan view of a mold clamping apparatus for lost foam casting according to the present embodiment.

Fig. 2 is a perspective view of the lower tooling plate.

Fig. 3 is a perspective view of the upper tooling plate.

Fig. 4 is a partially enlarged view of a portion a in fig. 2.

FIG. 5 is a view showing an overall fitting structure of the upper tool plate, the upper die, the lower tool plate and the lower die.

Wherein: 10 upper tooling plates, 20 lower tooling plates, 21 limiting frames, 30 guide mechanisms, 31 guide pins, 32 guide columns, 33 lower bearing plates, 34 upper top plates, 40 fixing plates, 211 concave parts and 311 guide protrusions.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

The embodiment provides a mold closing device for lost foam casting, which replaces the traditional manual mold closing operation mode, so that the purposes of improving mold closing precision and improving product yield are achieved.

Specifically, referring to fig. 1 to 3, the mold closing device for lost foam casting includes a lower tooling plate 20, a second cavity with an upward opening is formed in the lower tooling plate 20, and the second cavity is used for placing a lower mold; an upper tool plate 10 which is located above the lower tool plate 20 and is provided to be movable up and down with respect to the lower tool plate 20 (the arrow direction in fig. 1 is the direction of moving up and down); the upper tooling plate 10 is provided with a first cavity with a downward opening for fixing the upper die.

It should be noted that the upper mold and the lower mold are white molds for forming the lost foam, and for convenience of description, one of the two white molds is defined as the upper mold, and the other is defined as the lower mold.

The upper die is fixed with the upper tooling plate 10, and the upper die can be installed in the first concave cavity of the upper tooling plate 10 in a locking and fixing mode; and the lower die is placed in the second cavity in the lower tooling plate 20, and the placement is not equal to locking and fixing, so that an operator can directly and conveniently take and place the lower die in the second cavity.

After the upper die and the upper tooling plate 10 are fixed, the lower die is placed on the lower tooling plate 20, then the hot glue coating operation is carried out on the lower tooling plate, finally the upper tooling plate 10 is close to the lower tooling plate 20 so that the upper die and the lower die are assembled, and the white die gap (the gap between the upper die and the lower die) is completely filled by the hot glue coating, so that the white die becomes an integral lost foam.

According to the scheme, the upper tooling plate 10 and the lower tooling plate 20 are designed correspondingly for the upper die and the lower die (namely, a split white die structure), so that the upper die and the lower die are stably installed; cavities (a first cavity and a second cavity) are respectively arranged in the upper tooling plate and the lower tooling plate to further ensure the stability of the installation of the upper die and the lower die, and the automatic die closing device has great promotion effect on the final automatic die closing precision; meanwhile, the traditional manual die assembly is replaced by designing an automatic die assembly mode, so that the labor force is liberated, and the yield of the lost foam casting process is improved

In this embodiment, in order to stabilize the lower mold placed in the second cavity, a limiting frame 21 is disposed in the second cavity, the limiting frame 21 is adapted to the notch of the lower mold, and the lower mold is positioned and placed on the lower tooling plate 20 through the limiting frame 21.

The design is pertinently designed according to the notch of the lower die, namely the limiting frame 21 matched with the notch is arranged in the second cavity, so that when the lower die is placed, the precise positioning of the lower die is completed by the matching between the notch and the limiting frame 21; so far, the lower mould of being convenient for of existence of second cavity can be placed more stably, and the accurate positioning of position is placed to the lower mould of being convenient for to realize of existence of spacing frame 21, has guaranteed the precision of follow-up compound die step.

In the embodiment, referring to fig. 2 and 4, the limiting frame 21 is of an annular structure, one side of the limiting frame 21 is provided with a plurality of arc-shaped concave parts 211, and the concave parts 211 are mainly used for being matched with the structure of the lower die; the positioning of the lower die and the limit frame 21 is promoted.

In the embodiment, referring to fig. 1 and 5, in order to further improve the precision of the upper tooling plate 10 in the moving process, a guide mechanism 30 is further arranged between the lower tooling plate 20 and the upper tooling plate 10, and the guide mechanism 30 is mainly used for guiding the upper tooling plate 10 in the descending process; the lower tool plate 20 and the upper tool plate 10 enable the upper die and the lower die to be accurately matched through the guide mechanism 30.

Specifically, the guide mechanism 30 includes a guide pin 31 and a guide post 32 with a guide hole, and the upper tool plate 10 is close to the lower tool plate 20 so that the guide pin 31 is inserted into the guide post 32 for guiding.

In another embodiment, the guide mechanism 30 may also be a guide tool with higher precision such as a linear bearing or a KK module, and the linear bearing or the KK module can ensure the mold closing precision, and greatly promote the descending stability of the auxiliary upper tooling plate 10.

In the present embodiment, it is preferable that the guide pin 31 and the guide post 32 are matched, and the end of the guide pin 31 facing the guide post 32 is provided with a guide protrusion 311, and the diameter of the guide protrusion 311 is smaller than that of the guide hole.

In this way, during the process that the guide pin 31 and the guide post 32 approach each other, the guide protrusion 311 will enter the guide hole first, thereby ensuring that the subsequent guide pin 31 can be stably inserted into the guide post 32 to complete the guiding operation.

Optionally, the guide mechanism 30 further includes a lower support plate 33 and an upper top plate 34, the lower tooling plate 20 is fixed on the upper end face of the lower support plate 33, and the guide pins 31 are fixedly distributed at four corners of the lower support plate 33; the upper tooling plate 10 is fixed on the lower end surface of the upper top plate 34, and the guide posts 32 are fixedly distributed on the upper top plate 34 and are arranged corresponding to the guide pins 31 one by one.

In another embodiment, the guide pins 31 may be fixedly distributed on the upper top plate 34, and the guide posts 32 may be fixedly distributed on the lower support plate 33.

Optionally, the upper tooling plate 10 is fixedly connected with the upper top plate 34 through a fixing plate 40; an elastic buffer mechanism is also provided between the fixed plate 40 and the upper top plate 34.

The elastic buffer mechanism is arranged, the main purpose of the elastic buffer mechanism is to avoid the condition that a white mold (namely an upper mold or a lower mold) is extruded and deformed by strong force in the mold closing process, and a certain buffer force is given by the elastic buffer mechanism, particularly when the upper mold is pressed over the lower mold; the pressure of the upper die to the lower die is in a controllable range by arranging the elastic buffer mechanism, so that the extrusion deformation is avoided.

Specifically, the elastic buffer mechanism comprises a pin and a spring sleeved on the pin, the pin is fixed on the fixed plate 40, and two ends of the spring are respectively abutted against the fixed plate 40 and the upper top plate 34; the relaxation of the pressure is achieved by the provision of a spring.

In this embodiment, the upper plate 34 is fixed to a driver which drives the upper plate 34 to move the upper tooling plate 10 up and down.

The driver here may be a screw motor, an electric cylinder, an oil cylinder or an air cylinder, and in this embodiment, an air cylinder is preferably used as the driver for driving the upper tooling plate 10.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A mold closing device for lost foam casting is characterized by comprising

The lower tool plate (20), a second concave cavity with an upward opening is arranged in the lower tool plate (20), and the second concave cavity is used for placing a lower die;

an upper tooling plate (10) which is positioned above the lower tooling plate (20) and is arranged to be movable up and down relative to the lower tooling plate (20); the upper tooling plate (10) is provided with a first concave cavity with a downward opening and used for fixing the upper die;

the upper tool plate (10) is closed relative to the lower tool plate (20) so that the upper die and the lower die are clamped.

2. A mold closing device for lost foam casting according to claim 1, wherein a limit frame (21) is provided in the second cavity, the limit frame (21) is adapted to a notch in the lower mold, and the lower mold is positioned on the lower tooling plate (20) through the limit frame (21).

3. A mold clamping apparatus for lost foam casting according to claim 2, wherein said limit frame (21) has an annular configuration, and a plurality of curved concave portions (211) are provided in one side of said limit frame (21).

4. A mold clamping apparatus for lost foam casting according to any one of claims 1 to 3, wherein a guide mechanism (30) is further provided between the lower tool plate (20) and the upper tool plate (10), and the lower tool plate (20) and the upper tool plate (10) are adapted to perform precise mold clamping of the upper mold and the lower mold by the guide mechanism (30).

5. A mold clamping apparatus for lost foam casting according to claim 4, wherein said guide mechanism (30) comprises a guide pin (31) and a guide post (32) having a guide hole, and said upper tool plate (10) is moved closer to said lower tool plate (20) so that said guide pin (31) is inserted into said guide post (32) for guiding.

6. A mold clamping apparatus for lost foam casting according to claim 5, wherein a guide protrusion (311) is provided at an end of the guide pin (31) facing the guide post (32), and a diameter of the guide protrusion (311) is smaller than a diameter of the guide hole.

7. The mold clamping apparatus for lost foam casting according to claim 6, wherein the guide mechanism (30) further comprises a lower carrier plate (33) and an upper top plate (34), the lower tooling plate (20) is fixed on the upper end surface of the lower carrier plate (33), and the guide pins (31) are fixedly distributed at four corners of the lower carrier plate (33); the upper tooling plate (10) is fixed on the lower end face of the upper top plate (34), and the guide posts (32) are fixedly distributed on the upper top plate (34) and are arranged in one-to-one correspondence with the guide pins (31).

8. A mold clamping apparatus for lost foam casting according to claim 7, wherein said upper tool plate (10) is fixedly connected to said upper head plate (34) by a fixing plate (40).

9. A mold clamping apparatus for lost foam casting according to claim 8, wherein an elastic buffer mechanism is further provided between said stationary plate (40) and said upper head plate (34).

10. The mold clamping apparatus for lost foam casting according to claim 9, wherein the elastic buffer mechanism includes a pin fixed to the fixed plate (40) and a spring fitted around the pin, and both ends of the spring abut against the fixed plate (40) and the upper top plate (34), respectively.