Auxiliary mold opening device of evanescent mode mold

Abstract

The utility model provides an auxiliary mold opening device of an evanescent mode mold, which comprises a base, a lower mold is fixedly arranged on the base, an upper mold detachable cover is arranged at the top of the lower mold, and a cavity for forming an evanescent mode model is arranged between the upper mold and the lower mold; the worm is rotationally arranged on the base; the worm gear is rotationally arranged on the base and is meshed with the worm; the bottom of the rotating rod is fixedly arranged in the worm wheel in a penetrating mode, a first connecting block is fixedly arranged on the side face of the lower mold, the middle of the rotating rod is rotationally arranged on the first connecting block in a penetrating mode, and a second connecting block is fixedly arranged on the side face of the upper mold and provided with a threaded through hole; the side face of the upper end of the rotating rod is provided with threads matched with the threaded through hole. The first demolding assembly is arranged in the lower mold in a lifting manner and is used for extending into the cavity; the second demolding assembly is arranged in the upper mold in a lifting mode and used for stretching into the cavity. According to the technical scheme, the problems that an existing auxiliary mold opening device is inconvenient to operate and low in mold opening efficiency are solved.

Description

Technical Field

[0001] The utility model relates to a mold opening device, especially an auxiliary mold opening device for a lost foam mold. Background Art

[0002] Lost foam casting (also known as full-mold casting) is an important casting process. It combines paraffin or foam models similar in size and shape to the casting into a model cluster. After brushing refractory coating and drying, it is vibrated and shaped in dry quartz sand, poured under negative pressure, so that the model gasifies, and the liquid metal occupies the position of the model, and a casting is formed after solidification and cooling. In the lost foam casting process, the lost foam mold is a key tool, which directly affects the quality and casting efficiency of the casting.

[0003] In the mold opening process of the lost foam mold, generally the up-and-down mold opening method is adopted, that is, the upper mold and the lower mold are relatively moved by external force to expose the internal model structure, and then the model structure is taken out. However, when the currently widely used lost foam mold is opened, it usually relies on manual operation or simple mechanical devices, which is not only inefficient, time-consuming and laborious, but also easily causes mold damage or unqualified products due to improper operation. In addition, the lost foam model is also easy to adhere to the upper mold and the lower mold and is not easy to remove. Therefore, an auxiliary mold opening device for a lost foam mold that is easy to operate, has high mold opening efficiency and can avoid mold damage caused by manual operation is needed. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide an auxiliary mold opening device for a lost foam mold to solve the problems of inconvenient operation and low mold opening efficiency of the existing mold auxiliary mold opening device.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is as follows:

[0006] An auxiliary mold opening device for a lost foam mold, including a base, a lower mold fixedly arranged on the base, and an upper mold detachably covered on the top of the lower mold. A cavity for forming a lost foam model is arranged between the upper mold and the lower mold;

[0007] It further includes:

[0008] A worm, the worm is rotatably arranged on the base;

[0009] A worm gear, the worm gear is rotatably arranged on the base and meshes with the worm;

[0010] A rotating rod, the bottom of which is fixedly inserted into the worm wheel. A first connecting block is fixedly arranged on the side of the lower mold, and the middle part of the rotating rod is rotatably inserted into the first connecting block. A second connecting block is fixedly arranged on the side of the upper mold, and a threaded through hole is formed in the second connecting block. A thread cooperating with the threaded through hole is arranged on the side of the upper end of the rotating rod.

[0011] A first demolding assembly, which is arranged to move up and down in the lower mold and is used to extend into the cavity.

[0012] A second demolding assembly, which is arranged to move up and down in the upper mold and is used to extend into the cavity.

[0013] As a further technical solution, it further includes: a guide rod, which is fixedly arranged on the base in the vertical direction and is located on the side of the lower mold away from the rotating rod. Second connecting blocks are fixedly arranged on both sides of the upper mold, and the second connecting block away from the rotating rod is slidably sleeved on the guide rod.

[0014] As a further technical solution, the first demolding assembly includes:

[0015] A first installation groove, which is formed in the lower mold and is communicated with the cavity and the outside of the lower mold.

[0016] A lifting rod, which is slidably arranged in the first installation groove in the vertical direction, and one end or both ends extend out of the first installation groove and extend upward to between the first connecting block and the second connecting block, and is used to abut against the bottom surface of the second connecting block.

[0017] A first push rod, there are several first push rods, all of which are arranged in the first installation groove in the vertical direction, and the middle parts of them are fixedly inserted through the lifting rod. The upper ends of the first push rods slide in and out of the cavity.

[0018] A first thrust spring, there are several first thrust springs, which are respectively sleeved on the bottoms of several first push rods, and one end abuts against the lifting rod, and the other end abuts against the inner wall of the first installation groove.

[0019] As a further technical solution, an abutting block is fixedly arranged at the end of the lifting rod, and the top surface of the abutting block is used to abut against the bottom surface of the second connecting block. A receiving groove for receiving the abutting block is formed at the top of the first connecting block, and when the abutting block is located in the receiving groove, the top of the first push rod is flush with the bottom side wall of the cavity.

[0020] As a further technical solution, the second demolding assembly includes:

[0021] A second installation groove is vertically and penetratingly formed in the upper mold, and an annular stopper is fixedly arranged on the inner wall of the middle part of the second installation groove;

[0022] A second push rod is slidably inserted into the second installation groove in the vertical direction, and the annular stopper is sleeved outside the second push rod. The top end of the second push rod extends out of the second installation groove, and the bottom end slides in and out of the mold cavity. An annular clamping block is fixedly arranged on the outer wall of the second push rod, and the top of the annular clamping block is used to abut against the bottom of the annular stopper. When the annular clamping block abuts against the annular stopper, the bottom of the second push rod is flush with the top side wall of the mold cavity;

[0023] A second thrust spring is sleeved on the second push rod, and one end abuts against the annular stopper and the other end is fixedly connected to the second push rod.

[0024] As a further technical solution, a limiting frame is fixedly arranged on the top edge of the lower mold, and the bottom side wall of the upper mold is used to contact the inner wall of the limiting frame.

[0025] The beneficial effects of the present utility model are as follows:

[0026] The structure of the present utility model is simple. Through the cooperation of the worm and worm gear and the rotating rod, the upper mold and the lower mold can be easily separated. Then, by extending the first demolding assembly and the second demolding assembly into the mold cavity, the lost foam model can be pushed out, so that the lost foam model is successfully separated from the upper mold and the lower mold, avoiding adhesion. The present utility model can avoid manual rough mold opening. Only by rotating the worm can the mold be opened, which is convenient for operation and has high mold opening efficiency. Description of the Drawings

[0027] The following further describes the present utility model in detail in conjunction with the drawings and specific embodiments.

[0028] Figure 1 is a three-dimensional structural diagram of the present utility model;

[0029] Figure 2 is a cross-sectional structural diagram of the present utility model in the state where the upper mold and the lower mold are closed;

[0030] Figure 3 is a cross-sectional structural diagram of the present utility model in the state where the first demolding assembly performs demolding operation;

[0031] Figure 4 is a cross-sectional structural diagram of the present utility model in the state where the second demolding assembly and the first demolding assembly jointly perform demolding operation.

[0032] Description of the Reference Numerals

[0033] 1. Base; 2. Lower mold; 3. Upper mold; 4. Cavity; 5. Worm; 6. Worm gear; 7. Rotating rod; 8. First connecting block; 9. Second connecting block; 10. First demolding assembly; 101. First installation groove; 102. Lifting rod; 103. First push rod; 104. First thrust spring; 11. Second demolding assembly; 111. Second installation groove; 112. Annular stop; 113. Second push rod; 114. Annular clamping block; 115. Second thrust spring; 12. Guide rod; 13. Contact block; 14. Accommodating groove; 15. Limit frame; 16. Handle. Detailed implementation manner

[0034] Combined with the attached drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention are clearly and completely described. Many specific details are set forth in the following description in order to fully understand the present invention, but the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar promotions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0035] As Figures 1-4 shown, the present invention proposes an auxiliary mold opening device for a lost foam mold, which mainly includes a base 1, a lower mold 2, an upper mold 3, a worm 5, a worm gear 6, a rotating rod 7, a first demolding assembly 10 and a second demolding assembly 11.

[0036] The lower die 2 is fixedly arranged on the base 1, the upper die 3 is detachably covered on the top of the lower die 2, a cavity 4 for forming a lost foam model is arranged between the upper die 3 and the lower die 2, a limiting frame 15 is fixedly arranged on the top edge of the lower die 2, and the bottom side wall of the upper die 3 is used for contacting with the inner wall of the limiting frame 15. The installation positions of the upper die 3 and the lower die 2 can be limited by the limiting frame 15 to avoid unqualified lost foam models caused by the offset of the upper die 3. The worm 5 is rotatably arranged on the base 1, one end of the worm 5 is provided with a handle 16, and the worm 5 is driven to rotate by manually rotating the handle 16, which is convenient for operation. The worm gear 6 is rotatably arranged on the base 1 and meshes with the worm 5. The bottom of the rotating rod 7 is fixedly penetrated inside the worm gear 6. First connecting blocks 8 are fixedly arranged on the opposite side surfaces of the lower die 2. The middle part of the rotating rod 7 is rotatably penetrated through one of the first connecting blocks 8. A guide rod 12 is also fixedly arranged on the base 1 in the vertical direction. The guide rod 12 is located on the side of the lower die 2 away from the rotating rod 7 and is fixedly penetrated through the other first connecting block 8. Second connecting blocks 9 are fixedly arranged on the opposite side surfaces of the upper die 3. A threaded through hole is formed in one of the second connecting blocks 9. Threads matching the threaded through hole are arranged on the side surface of the upper end of the rotating rod 7. The other second connecting block 9 is slidably sleeved on the guide rod 12, which is beneficial to limiting the lifting movement track of the second connecting block 9 and the upper die 3.

[0037] The first demolding assembly 10 is arranged to be lifted and lowered inside the lower mold 2 and is used to extend into the cavity 4. Specifically, the first demolding assembly 10 includes a first installation groove 101, a lifting rod 102, a first push rod 103 and a first thrust spring 104. The first installation groove 101 is opened inside the lower mold 2. Specifically, the first installation groove 101 includes a horizontally arranged through groove and two vertically arranged vertical grooves with their bottoms communicating with the through groove. Both ends of the through groove communicate with the outside of the lower mold 2, and the top of the vertical groove communicates with the cavity 4. The lifting rod 102 is slidably arranged in the through groove of the first installation groove 101 in the vertical direction. One end or both ends of the lifting rod 102 extend out of the through groove of the first installation groove 101 and extend upward between the first connecting block 8 and the second connecting block 9, and is fixedly connected with an abutting block 13. The top surface of the abutting block 13 is used to abut against the bottom surface of the second connecting block 9. A receiving groove 14 for receiving the abutting block 13 is opened at the top of the first connecting block 8. In this embodiment, both ends of the lifting rod 102 extend out of the first installation groove 101 and are fixedly connected with an abutting block 13, and the two abutting blocks 13 at both ends of the lifting rod 102 are symmetrically arranged on both sides of the lower mold 2. By the downward movement of the upper mold 3, the bottom surface of the second connecting block 9 is driven to descend, and the abutting block 13 is pressed into the receiving groove 14, so as to limit the sliding path of the lifting rod 102, and also enable the bottom surface of the second connecting block 9 to contact the top surface of the first connecting block 8, ensuring the covering effect between the upper mold 3 and the lower mold 2; There are several first push rods 103, all arranged in the first installation groove 101 in the vertical direction, and the middle parts of them are fixedly penetrated through the lifting rod 102. Specifically, in this embodiment, there are two first push rods 103, which are respectively slidably arranged in the two vertical grooves of the first installation groove 101. The upper ends of the first push rods 103 slide in and out of the cavity 4. There are several first thrust springs 104, which are respectively sleeved on the bottoms of several first push rods 103. In this embodiment, there are two. One end of the first thrust spring 104 abuts against the lifting rod 102, and the other end abuts against the inner wall of the first installation groove 101. When the abutting block 13 is located in the receiving groove 14, the top of the first push rod 103 is flush with the bottom side wall of the cavity 4. In addition, the top diameter of the first push rod 103 is equal to the diameter of the top of the vertical groove, so that when the top of the first push rod 103 is flush with the bottom side wall of the cavity 4, the top of the first push rod 103 can completely block the vertical groove, avoiding the raw material from flowing into the vertical groove when pouring the raw material into the cavity 4. A sealing ring (not shown in the figure) can also be arranged on the side wall of the top of the first push rod 103 to block between the cavity 4 and the vertical groove. This sealing ring can slide upward along with the first push rod 103 under the thrust of the first thrust spring 104 and will not affect the sliding of the first push rod 103.

[0038] The second demolding assembly 11 is arranged to be lifted and lowered inside the upper mold 3 and is used to extend into the cavity 4. Specifically, the second demolding assembly 11 includes a second installation groove 111, a second push rod 113, and a second thrust spring 115. The second installation groove 111 is vertically and penetratingly opened inside the upper mold 3. An annular stopper 112 is fixedly arranged on the inner wall of the middle part of the second installation groove 111. The second push rod 113 is slidably penetrated through the second installation groove 111 in the vertical direction, and the annular stopper 112 is sleeved outside the second push rod 113. The top end of the second push rod 113 extends out of the second installation groove 111, and the bottom end slides in and out of the cavity 4. An annular clamping block 114 is fixedly arranged on the outer wall of the second push rod 113. The top of the annular clamping block 114 is used to abut against the bottom of the annular stopper 112. When the annular clamping block 114 abuts against the annular stopper 112, the bottom of the second push rod 113 is flush with the top side wall of the cavity 4. The second thrust spring 115 is sleeved on the second push rod 113, and one end abuts against the annular stopper 112, and the other end is fixedly connected to the second push rod 113. The bottom diameter of the second push rod 113 is equal to the bottom diameter of the second installation groove 111, and the sealing structure at the bottom of the second push rod 113 is the same as that at the top of the first push rod 103, which will not be elaborated here.

[0039] After the foamed and cured EPS beads are filled into the cavity 4 between the upper mold 3 and the lower mold 2 and cooled and formed, the mold can be opened to take out the model. In the state before the mold is opened, the upper mold 3 and the lower mold 2 are closed. The abutting block 13 is pressed into the receiving groove 14 by the second connecting block 9. The first thrust spring 104 is in a compressed state, and the second thrust spring 115 is in a compressed state or an original state. The top surface of the first push rod 103 and the bottom surface of the second push rod 113 are respectively flush with the bottom side wall and the top side wall of the cavity 4. The specific mold opening process of this embodiment is as follows: Rotate the handle 16 to drive the worm 5 to rotate. The worm 5 drives the worm wheel 6 to rotate, so that the rotating rod 7 rotates synchronously. Since the threaded through hole on the second connecting block 9 is in threaded cooperation with the rotating rod 7, when the rotating rod 7 rotates, it drives the second connecting block 9 to rise, and the upper mold 3 is gradually separated from the lower mold 2. During this process, as the second connecting block 9 rises, the abutting block 13 gradually breaks away from the pressing of the second connecting block 9 and gradually moves upward with the second connecting block 9 under the action of the first thrust spring 104, driving the lifting rod 102 and the first push rod 103 to slide upward, so that the top of the first push rod 103 gradually pushes the model upward, so that the model is gradually separated from the lower mold 2 as the upper mold 3 rises; then press the top of the second push rod 113 downward, so that the second push rod 113 slides downward along the second installation groove 111, and the bottom of the second push rod 113 separates the model from the upper mold 3. At this time, the second thrust spring 115 is further compressed. After the separation operation is completed, release the top of the second push rod 113, and the second push rod 113 resets under the action of the second thrust spring 115, that is, the mold opening and demolding operations of the model are completed, and the operation is simple and efficient.

[0040] The above description is only a preferred embodiment of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

Claims

1. An auxiliary mold opening device for a lost foam mold, comprising a base (1), a lower mold (2) fixedly arranged on the base (1), and an upper mold (3) detachably covered on the top of the lower mold (2). A cavity (4) for forming a lost foam model is arranged between the upper mold (3) and the lower mold (2); It is characterized in that It further comprises: A worm (5) rotatably arranged on the base (1); A worm gear (6) rotatably arranged on the base (1) and meshed with the worm (5); A rotating rod (7), the bottom of the rotating rod (7) is fixedly inserted into the interior of the worm gear (6). A first connecting block (8) is fixedly arranged on the side surface of the lower mold (2). The middle part of the rotating rod (7) is rotatably inserted through the first connecting block (8). A second connecting block (9) is fixedly arranged on the side surface of the upper mold (3). A threaded through hole is formed in the second connecting block (9), and a thread cooperating with the threaded through hole is arranged on the upper end side surface of the rotating rod (7); A first demolding assembly (10) is arranged to be lifted and lowered in the lower mold (2) for extending into the cavity (4); A second demolding assembly (11) is arranged to be lifted and lowered in the upper mold (3) for extending into the cavity (4).

2. The auxiliary mold opening device for a lost foam mold according to claim 1, wherein, It further comprises: A guide rod (12) fixedly arranged on the base (1) along the vertical direction and located on the side of the lower mold (2) away from the rotating rod (7). Second connecting blocks (9) are fixedly arranged on both side surfaces of the upper mold (3). The second connecting block (9) away from the rotating rod (7) is slidably sleeved on the guide rod (12).

3. The auxiliary mold opening device for a lost foam mold according to claim 1, characterized in that, The first demolding assembly (10) comprises: A first installation groove (101) formed in the lower mold (2) and communicating with the cavity (4) and the outside of the lower mold (2); A lifting rod (102) slidably arranged in the first installation groove (101) along the vertical direction, and one end or both ends extend out of the first installation groove (101) and extend upward between the first connecting block (8) and the second connecting block (9) for abutting against the bottom surface of the second connecting block (9); A plurality of first push rods (103) are all arranged in the first installation groove (101) along the vertical direction, and the middle parts of them are all fixedly inserted through the lifting rod (102). The upper ends of the first push rods (103) slide in and out of the cavity (4); A plurality of first thrust springs (104) are respectively sleeved on the bottoms of the plurality of first push rods (103), and one end abuts against the lifting rod (102), and the other end abuts against the inner wall of the first installation groove (101).

4. The auxiliary mold opening device for a lost foam mold according to claim 3, characterized in that, An abutting block (13) is fixedly arranged at the end of the lifting rod (102). The top surface of the abutting block (13) is used to abut against the bottom surface of the second connecting block (9). A receiving groove (14) for receiving the abutting block (13) is formed at the top of the first connecting block (8). When the abutting block (13) is located in the receiving groove (14), the top of the first push rod (103) is flush with the bottom side wall of the cavity (4).

5. The auxiliary mold opening device for a lost foam mold according to claim 1, characterized in that, The second demolding assembly (11) includes: A second installation groove (111) which is vertically and throughly formed in the upper mold (3). An annular stop block (112) is fixedly arranged on the inner wall of the middle part of the second installation groove (111). A second push rod (113) which is vertically slidably arranged in the second installation groove (111). The annular stop block (112) is sleeved outside the second push rod (113). The top end of the second push rod (113) extends out of the second installation groove (111), and the bottom end is slidably arranged in and out of the cavity (4). An annular clamping block (114) is fixedly arranged on the outer wall of the second push rod (113). The top of the annular clamping block (114) is used to abut against the bottom of the annular stop block (112). When the annular clamping block (114) abuts against the annular stop block (112), the bottom of the second push rod (113) is flush with the top side wall of the cavity (4). A second thrust spring (115) which is sleeved on the second push rod (113) and has one end abutting against the annular stop block (112) and the other end fixedly connected to the second push rod (113).

6. The auxiliary mold opening device for a lost foam mold according to claim 1, characterized in that, A limiting frame (15) is fixedly arranged at the top edge of the lower mold (2). The bottom side wall of the upper mold (3) is used to contact the inner wall of the limiting frame (15).

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