A mold removal tool for a test bar mold

Abstract

A demolding fixture for a test bar mold has a hook groove on its surface, with two blocking walls within the groove. The fixture includes a handle with a hook fixing block fixed to it. Two hooks are rotatably connected to the hook fixing block, both on the same plane of rotation. Each hook has a hook portion extending into the hook groove, with the two hook portions positioned opposite or back-to-back. The hooks can switch between a vertical and an inclined state. In the vertical state, the distance between the hook portions of the two hooks is less than or greater than the distance between the two blocking walls, allowing the hook portions to enter the hook groove only in an inclined state. When the two hooks switch from the inclined to the vertical state under their own weight, they can move towards or away from each other on the plane of rotation to engage the hook portions with the corresponding blocking walls. This demolding fixture for test bar molds is less likely to damage the sand mold and the test bar mold, has a long service life, and facilitates quick assembly and disassembly of the mold, resulting in high demolding efficiency.

Description

Technical Field

[0001] This utility model relates to the field of sand casting technology, specifically to a mold removal tool for a test bar mold. Background Technology

[0002] Aluminum alloy castings are widely used in aerospace, shipbuilding, power, automotive, and many other fields due to their superior metallic properties. Heat treatment of aluminum alloy castings can achieve excellent mechanical properties and also adjust the microstructure of the base alloy. The most common heat treatment process for aluminum alloy castings is T6 treatment, which is solution treatment followed by complete artificial aging. To verify whether the material properties meet the requirements after heat treatment, mechanical property tests are necessary. Aerospace aluminum alloy castings are generally tested by dissecting the casting itself or by using attached test bars. However, dissecting the casting itself is costly and damages the casting; therefore, in actual production, attached test bars are usually used in the same furnace as the casting for testing.

[0003] Currently, aluminum alloy castings used in aerospace applications are mainly produced using sand casting. Sand casting requires creating the cavity for the test bar, which is typically manufactured to uniform dimensions. This necessitates a test bar mold to form the cavity structure. Test bar molds can be made from materials such as wood, aluminum alloy, or steel. However, due to frequent reuse during long-term production, aluminum alloy or steel is generally preferred. During production, the test bar mold is completely embedded in the sand mold. Removing the mold from the sand mold is done by hand or by machining threaded holes in the mold and pulling it out with bolts. Both methods have drawbacks. Hand-digging can easily damage the sand mold, and using bolts can damage the threads over time, rendering the mold unusable or inconvenient to use. Utility Model Content

[0004] The purpose of this utility model is to provide a mold removal tooling for test bar molds that is not prone to damaging sand molds and test bar molds, has a long service life, and is convenient for quick assembly and separation from test bar molds, resulting in high mold removal efficiency.

[0005] The technical solution adopted by this utility model is: a mold-taking tool for a test bar mold, wherein the surface of the test bar mold has a hook groove and two blocking walls are provided in the hook groove;

[0006] The mold-taking fixture includes a handle, a hook fixing block is fixed on the handle, and two hooks are rotatably connected to the hook fixing block. The two hooks are on the same plane of rotation, and each hook has a hook connection part that can extend into the hook groove. The two hook connections parts are arranged opposite or back to back.

[0007] The hook has a vertical state and an inclined state that can be switched between each other. In the vertical state, the distance between the hook joints of the two hooks is less than or greater than the distance between the two blocking walls, so that the hook joints can only enter the hook groove in the inclined state.

[0008] When the two hooks switch from an inclined state to a vertical state under their own weight, they can move towards or away from each other on the plane of rotation to drive the hooking part to hook with the corresponding blocking wall.

[0009] As a preferred embodiment, a baffle is fixed to the end of the handle away from the hook fixing block, and a guide sleeve is sleeved on the outside of the handle between the baffle and the hook fixing block.

[0010] As a preferred embodiment, the hook also includes a straight arm, with the hook joint fixed to one end of the straight arm, and the included angle between the two is an acute angle.

[0011] As a preferred embodiment, the outer side of the connection between the straight arm and the hook joint has a guide slope.

[0012] As a preferred embodiment, the connection between each hook groove and the blocking wall is a guide wall;

[0013] When the hook is in the vertical position, the two guide ramps can move to directly above the corresponding guide wall.

[0014] As a preferred embodiment, there are two hook grooves, with two blocking walls located either adjacent to or far from the two hook grooves.

[0015] As a preferred embodiment, both the hook fixing block and the hook are provided with shaft holes, and the corresponding shaft holes are connected by shaft connectors.

[0016] As a preferred embodiment, the barrier wall is a horizontal wall surface.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. The test bar mold is removed from the sand mold using a pull hook, which is less likely to damage the sand mold and the test bar mold, has a long service life, and is convenient to quickly combine and separate from the test bar mold, resulting in high demolding efficiency;

[0019] 2. The hook can connect with the blocking wall by its own weight without manual operation, avoiding unnecessary force on the test rod mold, and ensuring stability during the demolding process.

[0020] 3. The design includes a rotatable pull hook and a relatively sliding guide sleeve, which can improve the stability of the test bar mold during the demolding process;

[0021] 4. The overall structure is simple, the cost is low, and it has good operability and durability. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is an overall axonometric view of the present invention;

[0024] Figure 2 This is a schematic diagram of the mold-taking tooling in this utility model;

[0025] Figure 3 This is a schematic diagram of the first embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the second embodiment of the present invention;

[0027] Figure 5 This is a cross-sectional schematic diagram of the pilot rod mold of this utility model.

[0028] Figure label:

[0029] 1. Test bar mold; 101. Hook groove; 102. Blocking wall; 1021. First blocking wall; 1022. Second blocking wall; 103. Guide wall;

[0030] 2. Handle;

[0031] 3. Hook fixing block;

[0032] 4. Hook, 401. Hook connection, 402. Straight arm, 403. Guide slope;

[0033] 5. Baffle;

[0034] 6. Guide sleeve;

[0035] 7. Stud;

[0036] 8. Nuts;

[0037] 9. Sand mold. Detailed Implementation

[0038] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0039] It should be noted that, unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "a," "an," or "the," etc., used in this utility model patent application specification and claims do not express a quantity limitation, but rather indicate the presence of at least one; the terms "first," "second," and "third," as used herein, should not be considered as a limitation on the order of components, but are merely for distinguishing different components; the terms "comprising" or "including," etc., indicate that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, but do not exclude other elements or objects having the same function.

[0040] To more clearly describe the specific structural composition of this test bar mold's ejection fixture, in conjunction with the attached... Figure 1-5 The following embodiments are described:

[0041] Example 1:

[0042] like Figure 1 , Figure 2 and Figure 3 As shown, a mold-taking tool for a test bar mold is provided. The surface of the test bar mold 1 has a hook groove 101, and the hook groove 101 has two blocking walls 102 (first blocking walls 1021) inside. The two first blocking walls 1021 are respectively located on the adjacent sides of the two hook grooves 101.

[0043] The mold-taking fixture includes a handle 2, a hook fixing block 3 fixed on the handle 2, and two hooks 4 rotatably connected to the hook fixing block 3. The two hooks 4 are located on the same rotation plane β. Each hook 4 has a hook connection part 401 that can extend into the hook groove 101. The two hook connection parts 401 are arranged opposite to each other.

[0044] Specifically, the hook 4 also includes a straight arm 402, and the hook part 401 is fixed to one end of the straight arm 402, and the included angle between the two is an acute angle;

[0045] The hooks 4 have interchangeable vertical and inclined states. In the vertical state, the distance between the hook parts 401 of the two hooks 4 is less than the distance between the two blocking walls 102, so that the hook parts 401 can only enter the hook groove 101 in the inclined state. When the two hooks 4 switch from the inclined state to the vertical state under their own weight, they can move towards each other on the plane of rotation β (e.g., Figure 3 (in the direction shown) to drive the hook part 401 to hook with the corresponding blocking wall 102 (first blocking wall 1021).

[0046] The blocking wall 102 can be a horizontal wall surface, used to restrict the vertical movement of the hook part 401. After the cavity of the test bar is made, the hook part 401 of the pull hook 4 extends into the hook groove 101 and hooks the test bar mold 1 out of the sand mold 9 with the blocking wall 102.

[0047] Example 2:

[0048] A mold-removing fixture for a test bar mold, which differs from that in Example 1, is as follows:

[0049] See Figure 4 The two blocking walls 102 (the second blocking wall 1022) are located on the far side of the two hook grooves 101, respectively;

[0050] The two hook parts 401 are arranged opposite to each other. In the vertical state, the distance between the hook parts 401 of the two hooks 4 is greater than the distance between the two blocking walls 102. When the two hooks 4 switch from an inclined state to a vertical state under their own weight, they can move opposite to each other on the plane of rotation β (e.g., Figure 4 (in the direction shown) to drive the hook part 401 to hook with the corresponding blocking wall 102 (second blocking wall 1022).

[0051] Example 3:

[0052] A mold-removing fixture for a test bar mold, which differs from that in Example 1, is as follows:

[0053] See Figure 1 and Figure 2 A baffle 5 is fixed to the end of the handle 2 away from the hook fixing block 3. A guide sleeve 6 is sleeved on the outside of the handle 2 between the baffle 5 and the hook fixing block 3. The guide sleeve 6 can slide on the outside of the handle 2.

[0054] The specific usage includes the following steps:

[0055] S1. After the cavity of the test bar is made, manually tilt the hook 4 so that its hook part 401 extends into the corresponding hook groove 101 of the test bar mold 1.

[0056] S2. Hold the guide sleeve 6 still with one hand, and grasp the baffle 5 with the other hand to raise the control handle 2. The hook part 401 is briefly suspended in the hook groove 101. Under the action of gravity, it switches from an inclined state to a vertical state, so that the hook part 401 hooks the first blocking wall 1021.

[0057] S3. Then, slide the hand holding the guide sleeve 6 upward to keep it stable, and grab the handle 2 and lift it upward with force until the test rod mold 1 is completely out of the sand mold 9.

[0058] S4. After the hook part 401 and the blocking wall 102 are separated, the hook 4 is taken out from the hook groove 101 of the test rod mold 1, and the test rod mold 1 continues to be used for molding.

[0059] During the demolding process, since the hook 4 can rotate under the hook fixing block 3, it can block the wobbling of the hook 4 on the rotation plane β to a certain extent, thus improving stability.

[0060] Example 4:

[0061] A mold-removing fixture for a test bar mold, which differs from that in Example 1, is as follows:

[0062] For details, please refer to Figure 5 The outer side of the connection between the straight arm 402 and the hook 401 has a guide slope 403, and the connection between each hook groove 101 and the blocking wall 102 is a guide wall 103; when the hook 4 is in the vertical state, the two guide slopes 403 can move to directly above the corresponding guide wall 103.

[0063] During use, the guide slope 403 on the hook part 401 is aligned with the guide wall 103 vertically. The handle 2 is lowered to make the guide wall 103 press against the guide slope 403, thereby tilting the straight arm 402 (it is not necessary to manually push the straight arm 402 to tilt). After the hook part 401 enters the hook groove 101, the handle 2 is pulled up. When the two hook parts 401 rise, they can move towards each other under the action of gravity to drive the hook part 401 to hook with the first blocking wall 1021.

[0064] In the above embodiments, both the hook fixing block 3 and the hook 4 are provided with shaft holes, and the corresponding shaft holes are connected by shaft connectors. The shaft connectors can specifically be studs 7 and nuts 8. The studs 7 pass through the holes of the hook 4 and the hook fixing block 3, and the nuts 8 are installed on the studs 7 to fix them in place, so that the hook 4 can rotate around the axis of the studs 7, and also to prevent the hook 4 from falling off.

[0065] In the above embodiments, the hook fixing block 3 can be designed as a telescopic structure, or the position of the shaft connector can be adjusted to change the spacing of the hook 4 in the vertical state, thereby adapting to the test rod mold 1 with different spacing of the blocking walls 102.

[0066] The parts not described in detail in the above embodiments are existing technologies.

[0067] It should be noted that although the present invention has been described through the above embodiments, there may be other various embodiments of the present invention. Without departing from the spirit and scope of the present invention, those skilled in the art can obviously make various corresponding changes and modifications to the present invention, but all such changes and modifications should fall within the scope of protection of the appended claims and their equivalents.

Claims

1. A mold-taking fixture for a test bar mold, wherein the surface of the test bar mold (1) has a hook groove (101), characterized in that: The hook groove (101) has two blocking walls (102); The mold-taking fixture includes a handle (2), a hook fixing block (3) is fixed on the handle (2), and two hooks (4) are rotatably connected on the hook fixing block (3). The two hooks (4) are on the same rotation plane, and each hook (4) has a hook connection part (401) that can extend into the hook groove (101). The two hook connection parts (401) are arranged opposite to each other or back to back. The hook (4) has a vertical state and an inclined state that can be switched between each other. In the vertical state, the distance between the hook parts (401) of the two hooks (4) is less than or greater than the distance between the two blocking walls (102), so that the hook parts (401) can only enter the hook groove (101) in the inclined state. When the two hooks (4) switch from an inclined state to a vertical state under their own weight, they can move towards or away from each other on the plane of rotation to drive the hook part (401) to hook with the corresponding blocking wall (102).

2. The mold-removing fixture for a test bar mold according to claim 1, characterized in that: A baffle (5) is fixed to one end of the handle (2) away from the hook fixing block (3), and a guide sleeve (6) is sleeved on the outside of the handle (2) between the baffle (5) and the hook fixing block (3).

3. The mold-removing fixture for a test bar mold according to claim 1, characterized in that: The hook (4) also includes a straight arm (402), with the hook part (401) fixed to one end of the straight arm (402), and the angle between the two is acute.

4. The mold-removing fixture for a test bar mold according to claim 3, characterized in that: The outer side of the hook part (401) has a guide slope (403).

5. The mold-removing fixture for a test bar mold according to claim 4, characterized in that: The connection between each hook groove (101) and the blocking wall (102) is a guide wall (103); When the hook (4) is in the vertical position, the two guide ramps (403) can move to directly above the corresponding guide wall (103).

6. The mold-removing fixture for a test bar mold according to claim 1, characterized in that: There are two hook grooves (101), and two blocking walls (102) are located on the adjacent side or the far side of the two hook grooves (101), respectively.

7. The mold-removing fixture for a test bar mold according to claim 1, characterized in that: Both the hook fixing block (3) and the hook (4) are provided with shaft holes, and the corresponding shaft holes are connected by shaft connectors.

8. The mold-removing fixture for a test bar mold according to claim 1, characterized in that: The barrier wall (102) is a horizontal wall.

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