Ejection mechanism of wax mould

Abstract

The utility model relates to the technical field of wax mould production, in particular to a wax mould ejection mechanism which comprises a wax mould casting table, supporting legs are fixedly installed at the bottom of the wax mould casting table, and a transmission ejection assembly is installed on the wax mould casting table. The transmission ejection assembly comprises two symmetrically-arranged half-mold-body molds, semicircular grooves are formed in the inner sides of the half-mold-body molds, electric telescopic rods are connected to the side edges of the half-mold-body molds, upper hydraulic rods are arranged over the two half-mold-body molds, connecting columns are installed at the output ends of the upper hydraulic rods, and inner barrel molds are fixedly connected to the bottoms of the connecting columns. The outer diameter of the inner cylinder mold is smaller than the inner diameter of the half mold body mold. When the electric telescopic rod is started to drive the half-mold-body molds on the two sides to separate and slide, the upper hydraulic rod and the lower hydraulic rod synchronously contract and extend, so that a formed wax mold is separated from the half-mold-body molds on the two sides and is lifted upwards at the same time, a good demolding effect is achieved, the cracking risk of the wax mold during demolding is reduced, and practicability is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of wax mold production, in particular to an ejection mechanism for wax molds. Background Art

[0002] A wax mold is a pattern made of wax material and is an important step in forming a casting cavity. The wax mold is a key element in the investment casting process and is used to form the cavity of the casting.

[0003] Referring to the utility model patent with the authorized announcement number CN213224186U, an ejection mechanism for wax molds is proposed, which includes a bracket, a sliding plate and a power component. The bracket and the power component are respectively fixedly connected to the wax mold die. The sliding plate is slidably connected to the bracket. A ejector rod is fixedly connected to the sliding plate, and the ejector rod is aligned with the cavity of the wax mold die. The output end of the power component is fixedly connected to the sliding plate. The power component is used to provide power to drive the sliding plate to slide relative to the bracket and make the ejector rod eject the wax mold from the cavity.

[0004] The above patent uses the direct ejection method with an ejector rod after the wax mold is formed. During this process, due to the large friction force of the wax mold die on the wax mold, it is very likely that the wax mold will be damaged during the direct lifting process. The self-strength of the wax mold is relatively low, so the practicality of the above patent is poor. To solve the above problems, we propose an ejection mechanism for wax molds. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the shortcomings in the prior art and propose an ejection mechanism for wax molds.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] An ejection mechanism for wax molds includes a wax mold casting table. Legs are fixedly installed at the bottom of the wax mold casting table, and a transmission ejection assembly is installed on the wax mold casting table. The transmission ejection assembly includes two symmetrically arranged half mold dies. A semi-circular groove is formed inside the half mold die. An electric telescopic rod is connected to the side of the half mold die. An upper hydraulic rod is arranged directly above the two half mold dies. A connecting column is installed at the output end of the upper hydraulic rod. An inner cylinder mold is fixedly connected to the bottom of the connecting column. The outer diameter of the inner cylinder mold is smaller than the inner diameter of the half mold die. Two folding rods are installed at the output end of the electric telescopic rod on the left side. A second oil cylinder and a first oil cylinder are respectively arranged on the upper and lower sides of the electric telescopic rod on the left side. The upper folding rod is fixedly connected to the piston at the end of the second oil cylinder, and the lower folding rod is fixedly connected to the piston at the end of the first oil cylinder. A first oil pipe is connected between the first oil cylinder and the lower hydraulic rod, and a second oil pipe is connected between the second oil cylinder and the upper hydraulic rod. The output end of the lower hydraulic rod slides through to the upper side of the wax mold casting table, and a movable bottom template is fixedly installed at the top of the output end of the lower hydraulic rod.

[0008] Preferably, the outer diameter of the movable bottom template is adapted to the inner diameter of the half-mold die, and a sealing ring is arranged on the outer ring of the movable bottom template, and a sealing strip is arranged on the inner side surface of the half-mold die.

[0009] Preferably, a sealing edge is arranged at the top of the inner cylinder die, a sealing gasket is installed at the bottom of the sealing edge, and a wax injection port is installed on the upper side of the sealing edge.

[0010] Preferably, a support groove is fixedly installed on the upper side of the wax mold casting table, the electric telescopic rod is fixedly installed on the upper side of the support groove, and the bottom of the half-mold die is in sliding contact with the upper side of the wax mold casting table.

[0011] Preferably, a sliding groove is formed in the wax mold casting table, the lower folding rod slides through to the lower side of the sliding groove, and the first oil cylinder is fixedly installed at the bottom of the wax mold casting table.

[0012] Preferably, a second fixed cylinder is fixedly sleeved outside the second oil cylinder, a second connecting rod is fixedly installed on the side of the second fixed cylinder, and the second connecting rod is fixedly installed on the upper side of the wax mold casting table.

[0013] Preferably, a bracket is fixedly installed on the upper side of the wax mold casting table, the upper hydraulic rod is fixedly installed at the bottom of the bracket, the lower hydraulic rod is fixedly installed at the bottom of the wax mold casting table, and a controller is installed on the side wall of the bracket.

[0014] Preferably, a first fixed cylinder is fixedly sleeved outside the upper hydraulic rod, and a first connecting rod is fixedly connected between the first fixed cylinder and the inner side of the bracket.

[0015] Preferably, the first oil cylinder and the second oil cylinder have the same model and size, and the inner diameter of the inner cylinder of the upper hydraulic rod is smaller than the inner diameter of the inner cylinder of the lower hydraulic rod.

[0016] Compared with the related art, a wax mold ejection mechanism proposed by the present utility model has the following beneficial effects:

[0017] In the present utility model, for the ejection mechanism of a wax mold, through the provided transmission ejection assembly, when the wax mold is cooled and formed inside the cavity formed between two half - mold dies and an inner - cylinder mold, the electric telescopic rods on both sides are started to drive the half - mold dies on both sides to separate outward. While the left - hand electric telescopic rod contracts, the folding rod above the left - hand electric telescopic rod drives the piston of the second oil cylinder to stretch outward of the second oil cylinder. As a result, the second oil cylinder sucks oil into the inner part of the upper hydraulic rod cylinder, so the upper hydraulic rod contracts, synchronously driving the inner - cylinder mold to lift upward. At the same time, the folding rod below the left - hand electric telescopic rod drives the piston of the first oil cylinder to squeeze inward of the first oil cylinder, causing the first oil cylinder to supply oil to the inner side of the lower hydraulic rod. Then, the lower hydraulic rod drives the movable bottom template at its output end to lift upward, synchronous with the contraction of the upper hydraulic rod. Thus, when the electric telescopic rods are started to drive the separation and sliding of the half - mold dies on both sides, the upper hydraulic rod and the lower hydraulic rod contract and extend synchronously, enabling the formed wax mold to be separated from the half - mold dies on both sides and lifted upward at the same time. It has a good demolding effect, reduces the risk of cracking of the wax mold during demolding, and enhances the practicability. Brief Description of the Drawings

[0018] Figure 1 is a schematic three - dimensional structure diagram of an ejection mechanism of a wax mold proposed by the present utility model Figure 1 ;

[0019] Figure 2 is a schematic three - dimensional structure diagram of an ejection mechanism of a wax mold proposed by the present utility model Figure 2 ;

[0020] Figure 3 is a schematic three - dimensional structure diagram of an ejection mechanism of a wax mold proposed by the present utility model Figure 3 ;

[0021] Figure 4 is a schematic three - dimensional disassembly diagram of the transmission ejection assembly of an ejection mechanism of a wax mold proposed by the present utility model.

[0022] In the figure: 1, support leg; 2, wax - mold casting table; 3, bracket; 4, controller; 5, support groove; 6, first fixed cylinder; 7, first connecting rod; 8, second fixed cylinder; 9, second connecting rod; 10, chute; 11, half - mold die; 12, electric telescopic rod; 13, upper hydraulic rod; 14, connecting column; 15, inner - cylinder mold; 16, lower hydraulic rod; 17, movable bottom template; 18, first oil cylinder; 19, second oil cylinder; 20, folding rod; 21, first oil pipe; 22, second oil pipe; 23, wax - injection port. Detailed Embodiment

[0023] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0024] Refer to Figures 1-4, An ejection mechanism for a wax mold: It includes a wax mold casting table 2, with legs 1 fixedly installed at the bottom of the wax mold casting table 2, and a transmission ejection assembly installed on the wax mold casting table 2; the transmission ejection assembly includes two symmetrically arranged half mold bodies 11, with a semi-circular groove opened on the inner side of the half mold body 11, an electric telescopic rod 12 connected to the side of the half mold body 11, an upper hydraulic rod 13 arranged directly above the two half mold bodies 11, a connecting column 14 installed at the output end of the upper hydraulic rod 13, and an inner cylinder mold 15 fixedly connected to the bottom of the connecting column 14. The outer diameter of the inner cylinder mold 15 is smaller than the inner diameter of the half mold body 11. Two folding rods 20 are installed at the output end of the left electric telescopic rod 12, and a second oil cylinder 19 and a first oil cylinder 18 are respectively arranged on the upper and lower sides of the left electric telescopic rod 12. The upper folding rod 20 is fixedly connected to the piston at the end of the second oil cylinder 19, and the lower folding rod 20 is fixedly connected to the piston at the end of the first oil cylinder 18. A first oil pipe 21 is connected between the first oil cylinder 18 and the lower hydraulic rod 16, and a second oil pipe 22 is connected between the second oil cylinder 19 and the upper hydraulic rod 13. The output end of the lower hydraulic rod 16 slides through to the upper side of the wax mold casting table 2, and a movable bottom template 17 is fixedly installed at the top of the output end of the lower hydraulic rod 16.

[0025] With the above settings, when the two half mold bodies 11 on both sides approach and close the mold, a cavity is formed inside them. The movable bottom template 17 at the bottom is located at the bottom of the cavity, and the inner cylinder mold 15 is inside the cavity formed by the two half mold bodies 11 in the row layer, and its bottom does not contact the movable bottom template 17 and the inside of the half mold body 11. At this time, a complete and unbroken internal cavity structure is formed between the outer walls of the two half mold bodies 11 and the movable bottom template 17. This cavity structure is the mold groove for the wax mold to be cast and formed.

[0026] In this way, the outer diameter of the movable bottom template 17 is adapted to the inner diameter of the half mold body 11, and a sealing ring is provided on the outer circle of the movable bottom template 17. A sealing strip is provided on the inner side surface of the half mold body 11. A sealing edge is provided at the top of the inner cylinder mold 15, a sealing gasket is installed at the bottom of the sealing edge, and a wax injection port 23 is installed on the upper side of the sealing edge.

[0027] With the above settings, the sealing strip, the sealing edge, and the sealing gasket are provided to ensure the sealing performance at each mold closing joint position after the mold is closed, preventing the leakage of molten wax slurry.

[0028] In this way, a support groove 5 is fixedly installed on the upper side of the wax mold casting table 2, the electric telescopic rod 12 is fixedly installed on the upper side of the support groove 5, and the bottom of the half mold body 11 is in sliding contact with the upper side of the wax mold casting table 2.

[0029] With the above settings, the support groove 5 provides a support point for the electric telescopic rod 12.

[0030] In this method, a chute 10 is provided on the wax mold casting table 2, the lower folding rod 20 slides through to the lower side of the chute 10, the first oil cylinder 18 is fixedly installed at the bottom of the wax mold casting table 2, a second fixed cylinder 8 is fixedly sleeved outside the second oil cylinder 19, a second connecting rod 9 is fixedly installed on the side of the second fixed cylinder 8, and the second connecting rod 9 is fixedly installed on the upper side of the wax mold casting table 2.

[0031] Through the above setting, the second fixed cylinder 8 is fixed on the wax mold casting table 2 through the second connecting rod 9, providing a connection and support function for the second oil cylinder 19 on the upper side.

[0032] In this method, a bracket 3 is fixedly installed on the upper side of the wax mold casting table 2, an upper hydraulic rod 13 is fixedly installed at the bottom of the bracket 3, a lower hydraulic rod 16 is fixedly installed at the bottom of the wax mold casting table 2, a controller 4 is installed on the side wall of the bracket 3, a first fixed cylinder 6 is fixedly sleeved outside the upper hydraulic rod 13, and a first connecting rod 7 is fixedly connected between the first fixed cylinder 6 and the inner side of the bracket 3.

[0033] Through the above setting, the first fixed cylinder 6 provides another connection point at the lower side of the upper hydraulic rod 13, strengthening the connection stability between the upper hydraulic rod 13 and the bracket 3, and thus ensuring the stability of the upper hydraulic rod 13 when lifting or lowering the inner cylinder mold 15.

[0034] In this method, the first oil cylinder 18 and the second oil cylinder 19 have the same model size, and the inner diameter of the cylinder body inside the upper hydraulic rod 13 is smaller than the inner diameter of the cylinder body inside the lower hydraulic rod 16.

[0035] Through the above setting, since the inner diameter of the cylinder body inside the upper hydraulic rod 13 is smaller than the inner diameter of the cylinder body inside the lower hydraulic rod 16, when the first oil cylinder 18 and the second oil cylinder 19 supply and suck oil synchronously, the contraction step distance of the upper hydraulic rod 13 is greater than the lifting step distance of the lower hydraulic rod 16, and thus the distance between the movable bottom template 17 and the bottom of the inner cylinder mold 15 gradually increases, which helps to complete the demolding work between the upper side of the movable bottom template 17 and the bottom of the inner cylinder mold 15.

[0036] The working principle of an ejection mechanism for a wax mold provided by the present utility model is as follows:

[0037] During use, the half-mold dies 11 on both sides complete mold clamping. At this time, wax slurry is injected into the wax injection port 23 on the upper side of the inner cylinder die 15. After the injection is completed and the internal wax cools to form a wax mold, the second electric telescopic rod 12 is started to contract, driving the half-mold dies 11 on both sides to separate from each other. At this time, the folding rod 20 under the left electric telescopic rod 12 drives the piston of the first oil cylinder 18 to squeeze towards the inside of the first oil cylinder 18, causing the first oil cylinder 18 to supply oil to the inside of the lower hydraulic rod 16. Then, the lower hydraulic rod 16 drives the movable bottom template 17 on its output end to lift. The folding rod 20 above the left electric telescopic rod 12 drives the piston of the second oil cylinder 19 to stretch towards the outside of the second oil cylinder 19. As a result, the second oil cylinder 19 sucks oil from the inside of the upper hydraulic rod 13 cylinder body, and then the upper hydraulic rod 13 contracts, synchronously driving the inner cylinder die 15 to lift upward. The contraction and lifting actions of the upper hydraulic rod 13 and the lower hydraulic rod 16 are consistent, so that the demolded wax mold is located between the movable bottom template 17 and the inner cylinder die 15. At the same time, since the contraction step of the upper hydraulic rod 13 is greater than the lifting step of the lower hydraulic rod 16, the wax mold gradually falls off the outer wall of the inner cylinder die 15 during the rising process of the wax mold, and finally the demolding is completed and the wax mold is supported on the upper side of the movable bottom template 17.

[0038] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. An ejection mechanism for a wax pattern, characterized in that, It includes a wax pattern casting table (2), and legs (1) are fixedly installed at the bottom of the wax pattern casting table (2). A transmission and ejection assembly is installed on the wax pattern casting table (2). The transmission and ejection assembly includes two symmetrically arranged half mold dies (11). A semi-circular groove is provided inside the half mold die (11). An electric telescopic rod (12) is connected to the side of the half mold die (11). An upper hydraulic rod (13) is arranged directly above the two half mold dies (11). A connecting column (14) is installed at the output end of the upper hydraulic rod (13). A bottom fixed connection with an inner cylinder mold (15) is provided at the bottom of the connecting column (14). The outer diameter of the inner cylinder mold (15) is smaller than the inner diameter of the half mold die (11). Two folding rods (20) are installed at the output end of the left electric telescopic rod (12). A second oil cylinder (19) and a first oil cylinder (18) are respectively arranged on the upper and lower sides of the left electric telescopic rod (12). The upper folding rod (20) is fixedly connected to the piston at the end of the second oil cylinder (19), and the lower folding rod (20) is fixedly connected to the piston at the end of the first oil cylinder (18). A first oil pipe (21) is connected between the first oil cylinder (18) and the lower hydraulic rod (16), and a second oil pipe (22) is connected between the second oil cylinder (19) and the upper hydraulic rod (13). The output end of the lower hydraulic rod (16) slides through to the upper side of the wax pattern casting table (2), and a movable bottom template (17) is fixedly installed at the top of the output end of the lower hydraulic rod (16).

2. The ejection mechanism of a wax mold according to claim 1, characterized in that, The outer diameter of the movable bottom template (17) is adapted to the inner diameter of the half mold die (11), and a sealing ring is arranged on the outer circle of the movable bottom template (17). A sealing rubber strip is arranged on the inner side surface of the half mold die (11).

3. The ejection mechanism of a wax mold according to claim 1, characterized in that, A sealing edge is arranged at the top of the inner cylinder mold (15), a sealing gasket is installed at the bottom of the sealing edge, and a wax injection port (23) is installed on the upper side of the sealing edge.

4. The ejection mechanism of a wax mold according to claim 1, characterized in that, A support groove (5) is fixedly installed on the upper side of the wax pattern casting table (2). The electric telescopic rod (12) is fixedly installed on the upper side of the support groove (5). The bottom of the half mold die (11) is in sliding contact with the upper side of the wax pattern casting table (2).

5. The ejection mechanism of a wax mold according to claim 1, characterized in that, A sliding groove (10) is provided on the wax pattern casting table (2). The lower folding rod (20) slides through to the lower side of the sliding groove (10), and the first oil cylinder (18) is fixedly installed at the bottom of the wax pattern casting table (2).

6. The ejection mechanism of a wax mold according to claim 1, characterized in that, A second fixed cylinder (8) is fixedly sleeved outside the second oil cylinder (19). A second connecting rod (9) is fixedly installed on the side of the second fixed cylinder (8), and the second connecting rod (9) is fixedly installed on the upper side of the wax pattern casting table (2).

7. The ejection mechanism of a wax mold according to claim 1, characterized in that, A bracket (3) is fixedly installed on the upper side of the wax pattern casting table (2). The upper hydraulic rod (13) is fixedly installed at the bottom of the bracket (3). The lower hydraulic rod (16) is fixedly installed at the bottom of the wax pattern casting table (2). A controller (4) is installed on the side wall of the bracket (3).

8. The ejection mechanism of a wax mold according to claim 1, characterized in that, A first fixed cylinder (6) is fixedly sleeved outside the upper hydraulic rod (13), and a first connecting rod (7) is fixedly connected between the first fixed cylinder (6) and the inner side of the bracket (3).

9. The ejection mechanism of a wax mold according to claim 1, characterized in that, The first oil cylinder (18) and the second oil cylinder (19) have the same model size, and the inner diameter of the cylinder body inside the upper hydraulic rod (13) is smaller than the inner diameter of the cylinder body inside the lower hydraulic rod (16).

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