Integral forming device for inlet and outlet short pipe evanescent mode mold

Abstract

The utility model relates to the technical field of evanescent mode forming, and provides an inlet and outlet short pipe evanescent mode mold integral forming device which comprises an upper mold, a lower mold and a movable loose piece, the upper mold and the lower mold are used for being matched and assembled for use, and the shapes of the upper mold and the lower mold are used for being matched with the shapes of flanges at the two ends of a short pipe respectively. The movable movable blocks are slidably arranged relative to the lower mold and located between the upper mold and the lower mold, the side face shapes of the movable movable blocks are used for being matched with the side face shape of the short pipe, and a forming cavity is formed among the upper mold, the lower mold and the movable movable blocks. By means of the technical scheme, the problem that in the prior art, after block forming of the white mold, the complete white mold can be formed for use only by assembling and bonding is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of lost foam molding, and specifically, to an integral molding device for a lost foam mold of an inlet and outlet short pipe. Background Art

[0002] In modern industrial production, as a key component in many industrial equipment and systems, the inlet and outlet short pipe has relatively high quality and performance requirements. In the production of the inlet and outlet short pipe, the lost foam casting technology is widely used due to its unique advantages.

[0003] When producing the short pipe blank, it is first necessary to use polystyrene to make a lost foam white mold of the short pipe that is similar in size and shape to the short pipe blank (commonly known as the white mold because of its white color). The specific process is as follows: after brushing and drying the refractory coating, it is buried in dry quartz sand and vibrated for molding, and then cast under negative pressure to vaporize the lost foam white mold of the short pipe, and the liquid metal occupies the position of the short pipe white mold, and after solidifying and cooling, a short pipe blank is formed.

[0004] And the lost foam of the short pipe needs to be made by a mold. Its general process is as follows: pre-expand and ripen the polystyrene beads, then fill them into the mold, and make them expand again and fuse together through heating and pressurization to form a white mold of the required shape. The formed white mold is taken out of the mold and cooled to make it solidify and take shape. However, when designing the production mold of the current short pipe lost foam, in order to facilitate demolding, it is usually divided into two parts according to the short pipe structure and the molds are made separately, and then the upper half mold and the lower half mold of the short pipe are made respectively. After the upper half mold and the lower half mold of the short pipe are positioned and bonded by the positioning part, a complete lost foam white mold of the short pipe is formed.

[0005] For the mold made by this scheme, after the white mold is formed in blocks, it needs to be assembled and bonded to form a complete white mold for use, which increases the white mold bonding process and has low production efficiency. In view of the above problems, the prior art has not solved them well, bringing trouble to the normal progress of the work in this field. Therefore, there is an urgent need for an integral molding device for a lost foam mold of an inlet and outlet short pipe to solve the above problems. Summary of the Utility Model

[0006] The utility model provides an integral molding device for a lost foam mold of an inlet and outlet short pipe, which solves the problem that in the related technology, the white mold needs to be assembled and bonded after being formed in blocks to form a complete white mold for use.

[0007] The technical solution of the present utility model is as follows: An integral forming device for a lost foam mold of a short pipe at the entrance and exit, including an upper mold, a lower mold and a movable block. The upper mold and the lower mold are used for mating and assembling. The shapes of the upper mold and the lower mold are respectively adapted to the shapes of the flanges at both ends of the short pipe. The movable block is slidably arranged relative to the lower mold and is located between the upper mold and the lower mold. There are at least two movable blocks, and the shape of the side surface of the movable block is adapted to the shape of the side surface of the short pipe. A forming cavity is formed between the upper mold, the lower mold and the movable block.

[0008] Optionally, the upper mold has a receiving cavity for receiving the movable block.

[0009] Optionally, the lower mold has a forming post, and the shape of the forming post is adapted to the shape of the cavity in the center of the short pipe. The movable block slides along the radial direction of the forming post.

[0010] Optionally, the lower mold has a track, and the movable block is slidably arranged on the track.

[0011] Optionally, there are at least two tracks and they are parallel to each other. The direction of the track is parallel to the radial direction of the forming post.

[0012] Optionally, the movable block has a weight-reducing cavity.

[0013] Optionally, the movable block has a movable rib.

[0014] Optionally, the lower mold has a positioning pin, and the upper mold has a positioning hole.

[0015] Optionally, both the positioning pin and the positioning hole are conical.

[0016] Optionally, the edges of both the upper mold and the lower mold have auxiliary flanges.

[0017] The working principle and beneficial effects of the present utility model are as follows:

[0018] In practical applications, first, according to the size and shape requirements of the short pipe at the entrance and exit, the upper mold, the lower mold and the movable block are designed and manufactured. The shapes of the upper mold and the lower mold are adapted to the shapes of the flanges at both ends of the short pipe, ensuring that the flange part of the short pipe can be accurately formed. There are at least two movable blocks, and the shape of the side surface of the movable block is adapted to the shape of the side surface of the short pipe, ensuring that the side surface of the short pipe can be completely formed.

[0019] When manufacturing the short-tube lost foam pattern, fix the lower mold on the workbench. Then, slide the movable block to the preset position. Next, pre-expand and ripen the polystyrene beads, and fill them into the forming cavity formed between the upper mold, the lower mold, and the movable block. Subsequently, use heating and pressurizing equipment to make the polystyrene beads in the forming cavity expand again and fuse together to form the white pattern of the short-tube lost foam pattern in the required shape.

[0020] After the white pattern is formed and cooled and solidified, perform the demolding operation. First, lift the upper mold upward to separate it from the formed white pattern. Then, slide the movable block by external force to make it slide to both sides and gradually separate from the white pattern. Finally, take out the formed white pattern of the short-tube lost foam pattern from the lower mold to complete the entire manufacturing process.

[0021] This solution has the following remarkable beneficial effects. First, the overall forming of the short-tube lost foam pattern is realized, avoiding the process of assembly and bonding required after traditional block forming, and greatly improving the production efficiency. During the manufacturing process, there is no need to perform cumbersome bonding operations, saving time and labor costs. Second, due to the overall forming, the dimensional accuracy and surface quality of the short-tube lost foam pattern are guaranteed. The close cooperation between the upper mold, the lower mold, and the movable block makes the formed white pattern have high precision and consistency, reducing the possibility of casting defects occurring during the subsequent casting process and improving the product yield. Third, the setting of the movable block makes the demolding process very convenient. Demolding can be easily achieved by sliding the movable block, avoiding the problem of difficult demolding of traditional molds, reducing the risk of mold damage, and extending the service life of the mold. Description of the Drawings

[0022] The above characteristics, technical features, advantages and their implementation manners of the present utility model will be further described below in a clear and understandable manner in combination with the drawings for the preferred embodiments.

[0023] Figure 1 It is a schematic structural diagram of the closed mold state of the upper mold and the lower mold in the present utility model;

[0024] Figure 2 It is a schematic internal structural diagram of the upper mold and the lower mold in the present utility model;

[0025] Figure 3 It is a schematic structural diagram of the movable block in the present utility model;

[0026] Figure 4 It is a schematic structural diagram of the split short-tube lost foam pattern and its mold in the prior art.

[0027] In the figure: 1. Upper die, 2. Lower die, 3. Movable block, 4. Short tube, 5. Forming cavity, 6. Accommodating cavity, 7. Forming column, 8. Track, 9. Weight reduction cavity, 10. Movable rib, 11. Positioning pin, 12. Positioning hole, 13. Auxiliary flanging, 14. Upper half die, 15. Lower half die, 16. Positioning part. Specific implementation mode

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation modes of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings, and other implementation modes can be obtained.

[0029] To make the drawings concise, only the parts related to the utility model are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, components with the same structure or function are only schematically shown for one of them, or only one of them is marked. In this article, "one" not only means "only this one", but also means "more than one" situation, and "several" includes "two" and "more than two".

[0030] In this article, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0031] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

[0032] Referring to Figures 1 to 4 , for the first embodiment of the present invention, an overall forming device for a lost foam mold of an entrance and exit short tube is proposed, including an upper die 1, a lower die 2, and a movable block 3. The upper die 1 and the lower die 2 are used for mating and assembling. The shapes of the upper die 1 and the lower die 2 are respectively adapted to the flange shapes at both ends of the short tube 4. The movable block 3 is slidably arranged relative to the lower die 2 and is located between the upper die 1 and the lower die 2. There are at least two movable blocks 3, and the side shape of the movable block 3 is adapted to the side shape of the short tube 4. A forming cavity 5 is formed between the upper die 1, the lower die 2, and the movable block 3.

[0033] In this embodiment, in practical applications, first, according to the size and shape requirements of the short pipe 4 at the entrance and exit, the upper mold 1, the lower mold 2, and the movable block 3 are designed and manufactured. The shapes of the upper mold 1 and the lower mold 2 match the shapes of the flanges at both ends of the short pipe 4, ensuring that the flange part of the short pipe 4 can be accurately formed. There are at least two movable blocks 3, and the side shapes of the movable blocks 3 match the side shape of the short pipe 4, ensuring that the side of the short pipe 4 can be completely formed.

[0034] When manufacturing the lost foam pattern of the short pipe 4, the lower mold 2 is fixed on the workbench. Then, the movable block 3 is slid to a preset position. Next, after pre-foaming and aging the polystyrene beads, they are filled into the forming cavity 5 formed between the upper mold 1, the lower mold 2, and the movable block 3. Subsequently, through heating and pressurizing equipment, the polystyrene beads in the forming cavity 5 are expanded again and fused together to form the lost foam pattern white mold of the short pipe 4 with the required shape.

[0035] After the white mold is formed and cooled and solidified, the demolding operation is carried out. First, the upper mold 1 is lifted upward to separate from the formed white mold. Then, by applying an external force to slide the movable block 3, it slides to both sides and gradually separates from the white mold. Finally, the formed lost foam pattern white mold of the short pipe 4 is taken out from the lower mold 2 to complete the entire manufacturing process.

[0036] This solution has the following remarkable beneficial effects. First, the overall forming of the lost foam pattern of the short pipe 4 is realized, avoiding the process of assembly and bonding required after traditional block forming, and greatly improving the production efficiency. During the manufacturing process, there is no need for cumbersome bonding operations, saving time and labor costs. Second, due to the overall forming, the dimensional accuracy and surface quality of the lost foam pattern of the short pipe 4 are guaranteed. The close cooperation between the upper mold 1, the lower mold 2, and the movable block 3 makes the formed white mold have high precision and consistency, reducing the possibility of casting defects during the subsequent casting process and improving the product yield. Furthermore, the setting of the movable block 3 makes the demolding process very convenient. By sliding the movable block 3, demolding can be easily achieved, avoiding the problem of difficult demolding of traditional molds, reducing the risk of mold damage, and extending the service life of the mold.

[0037] Furthermore, the upper mold 1 is provided with a receiving cavity 6, and the receiving cavity 6 is used to receive the movable block 3.

[0038] In this embodiment, the receiving cavity 6 provides a storage space for the movable block 3. During the forming process, the top surface of the movable block 3 closely fits the top wall of the receiving cavity 6, and the bottom surface of the movable block 3 closely fits the surface of the lower mold 2. Since both ends of the movable block 3 abut against the top wall of the receiving cavity 6 and the lower mold 2 respectively, the forming cavity 5 formed between the upper mold 1, the lower mold 2, and the movable block 3 has excellent sealing performance.

[0039] During the heating and pressurization process, this sealing property is crucial. It can ensure that the polystyrene beads fully expand and fuse within the molding cavity 5, preventing incomplete molding due to gaps. Meanwhile, good sealing is also conducive to controlling the pressure and temperature during the molding process, making the molding of the short tube 4 lost foam pattern more uniform and stable. After the pattern is molded and cooled and solidified, the demolding operation is carried out. The upper mold 1 is lifted upward, and the movable block 3 gradually disengages from the receiving cavity 6 as the upper mold 1 rises. Subsequently, by sliding the movable block 3, the molded short tube 4 lost foam pattern can be removed from the lower mold 2.

[0040] Furthermore, the lower mold 2 is provided with a molding post 7, and the shape of the molding post 7 is adapted to the shape of the cavity in the center of the short tube 4, and the movable block 3 slides along the radial direction of the molding post 7.

[0041] In this embodiment, the shape of the molding post 7 on the lower mold 2 is adapted to the shape of the cavity in the center of the short tube 4. By sliding the movable block 3 along the radial direction of the molding post 7 to make the multiple movable blocks 3 fit together, and the distance between each movable block 3 and the molding post 7 is equal, the shape accuracy of the molding cavity 5 can be guaranteed.

[0042] During the heating and pressurization process, the molding post 7, together with the movable block 3, the upper mold 1 and the lower mold 2, forms the molding cavity 5. The molding post 7, the movable block 3, the upper mold 1 and the lower mold 2 act together to make the polystyrene beads fully expand and fuse together to form a high-quality short tube 4 lost foam pattern.

[0043] After the pattern is molded and cooled and solidified, the demolding operation is carried out. First, the upper mold 1 is lifted upward, and the movable block 3 gradually disengages from the receiving cavity 6. Then, the movable block 3 is pushed along the radial direction of the molding post 7 to completely disengage it from the pattern. Finally, the molded short tube 4 lost foam pattern is removed from the molding post 7 on the lower mold 2 to complete the entire manufacturing process.

[0044] Furthermore, the lower mold 2 is provided with a track 8, and the movable block 3 is slidably arranged on the track 8.

[0045] Furthermore, there are at least two tracks 8 and they are parallel to each other, and the direction of the track 8 is parallel to the radial direction of the molding post 7.

[0046] In this embodiment, the track 8 provides an accurate path for the sliding of the movable block 3, ensuring the accuracy of the sliding direction of the movable block 3, enabling the multiple movable blocks 3 to accurately butt together to form a molding cavity 5 with precise shape, thereby improving the molding quality of the short tube 4 lost foam. At the same time, the track 8 improves the smoothness of the sliding of the movable block 3, reducing possible jamming, shaking, etc. during the sliding process, and ensuring the stability and reliability of the entire manufacturing process.

[0047] Furthermore, the movable block 3 has a weight-reducing cavity 9.

[0048] In this embodiment, the weight-reducing cavity 9 on the movable block 3 reduces the weight of the movable block 3, facilitating operation and improving production efficiency, and enabling the movable block 3 to form a thin-wall structure. The thin-wall structure can produce slight deformation, making it easier to closely adhere to the top wall of the accommodating cavity 6 and the surface of the lower mold 2, ensuring the sealing of the molding cavity 5 and improving the molding quality of the lost foam of the short tube 4. At the same time, it reduces the processing difficulty of the mating surface and decreases the processing time and cost.

[0049] Furthermore, the movable block 3 is provided with a movable rib 10.

[0050] In this embodiment, the operator can easily slide the movable block 3 along the track 8 on the lower mold 2 to the designated position by clamping the movable rib 10. The movable rib 10 provides a convenient force application point for the operator, making the position adjustment of the movable block 3 faster and more accurate.

[0051] Furthermore, the lower mold 2 is provided with a positioning pin 11, and the upper mold 1 is provided with a positioning hole 12.

[0052] In this embodiment, the positioning pin 11 on the lower mold 2 can be accurately inserted into the positioning hole 12 of the upper mold 1, ensuring more accurate positioning of the upper mold 1 and the lower mold 2, so that the molding cavity 5 formed among the upper mold 1, the lower mold 2 and the movable block 3 can maintain precise shape and dimensions, providing a stable environment for the expansion and fusion of polystyrene beads. During the demolding operation, when the upper mold 1 is lifted upward, the positioning pin 11 and the positioning hole 12 will play a guiding role to a certain extent, making the demolding process smoother and reducing the risk of damage to the white mold.

[0053] Furthermore, both the positioning pin 11 and the positioning hole 12 are conical.

[0054] In this embodiment, both the positioning pin 11 and the positioning hole 12 are conical. The guiding function of the conical shape ensures accurate positioning of the upper mold 1 and the lower mold 2, enhancing the stability and reliability of the mold. It helps to keep the shape and dimensions of the molding cavity 5 stable and improves the molding quality of the lost foam of the short tube 4.

[0055] Furthermore, the edges of both the upper mold 1 and the lower mold 2 are provided with auxiliary flanges 13.

[0056] In this embodiment, the auxiliary flanges 13 can serve as positioning parts, making the installation of the upper mold 1 and the lower mold 2 more convenient and rapid, and improving production efficiency.

[0057] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered by the scope of the claims of the present invention.

Claims

1. An integral forming device for an inlet and outlet short pipe lost foam mold, characterized in that: The invention comprises an upper mold (1), a lower mold (2) and a movable block (3), wherein the upper mold (1) and the lower mold (2) are used for assembly, the shapes of the upper mold (1) and the lower mold (2) are used to match the shapes of flanges at both ends of a short tube (4), respectively, the movable block (3) is slidably arranged relative to the lower mold (2) and is located between the upper mold (1) and the lower mold (2), there are at least two movable blocks (3), the side shape of the movable block (3) is used to match the side shape of the short tube (4), and a molding cavity (5) is formed between the upper mold (1), the lower mold (2) and the movable block (3).

2. The device for integrally forming an inlet and outlet short pipe lost foam mold according to claim 1, characterized in that: The upper mold (1) has a receiving cavity (6), and the receiving cavity (6) is used to receive the movable block (3).

3. The device for integrally forming an inlet and outlet short pipe lost foam mold according to claim 2, characterized in that: The lower mold (2) is provided with a molding column (7), the shape of the molding column (7) being adapted to match the shape of the cavity at the center of the short tube (4), and the movable block (3) slides radially along the molding column (7).

4. The device for integrally forming an inlet and outlet short pipe lost foam mold according to claim 3, characterized in that: The lower mold (2) is provided with a track (8), and the movable block (3) is slidably arranged on the track (8).

5. The device for integrally forming an inlet and outlet short pipe lost foam mold according to claim 4, characterized in that: There are at least two tracks (8) that are parallel to each other, and the direction of the tracks (8) is parallel to the radial direction of the forming column (7).

6. The device for integrally forming an inlet and outlet short pipe lost foam mold according to claim 5, characterized in that: The movable block (3) has a weight-reducing chamber (9).

7. The device for integrally forming an inlet and outlet short pipe lost foam mold according to claim 6, characterized in that: The movable block (3) is provided with a movable tensioning rod (10).

8. The device for integrally forming an inlet and outlet short pipe lost foam mold according to claim 1, characterized in that: The lower mold (2) has a positioning pin (11), and the upper mold (1) has a positioning hole (12).

9. The device for integrally forming an inlet and outlet short pipe lost foam mold according to claim 8, characterized in that: The positioning pin (11) and the positioning hole (12) are both conical.

10. The device for integrally forming an inlet and outlet short pipe lost foam mold according to claim 1, characterized in that: The edges of the upper mold (1) and the lower mold (2) are both provided with auxiliary flanges (13).

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