Honeycomb core no-residue potting mold and process

Abstract

The invention discloses a honeycomb core zero-residue potting mold and a process, comprising a potting mold body, a pressure rod guide lock, a pressure rod pressure block, a connecting rod and a pressure rod handle. The invention utilizes a movable isolation material and a potting mold to constrain a fluid potting material before potting, fills and flattens the potting mold body with the potting material at one time, and makes the pressure rod completely contact the potting material without trapped air, thereby solving quality defects, making the honeycomb core cells fully filled, without air bubble cavities inside, with a smooth surface that matches the required profile, and with accurate potting position and size. In addition, the mold of the invention can be designed according to parameters such as potting position size, shape, and volume, so that the mold has the same volume as the potting size, and the required amount of potting material can be accurately calculated, saving raw materials, having excellent processability in use, simple operation, low labor intensity, low material loss, and obvious environmental improvement.

Description

Technical Field

[0001] The invention relates to the technical field of honeycomb core potting, and in particular to a honeycomb core zero-residue potting mold and process. Background Art

[0002] The composite sandwich structure uses a honeycomb core as the interlayer, which greatly reduces the weight compared to metal structures and has a high specific stiffness. It has been widely used in aerospace structures, especially in secondary load-bearing structural parts with high bending stiffness requirements. However, due to the unique structural characteristics of the honeycomb, its ability to withstand concentrated loads is weak, so local potting reinforcement is required where local connection inserts need to be installed.

[0003] Due to the consideration of comprehensive factors such as the mechanical strength of the material after curing in the location where the material needs to be strengthened, the tolerance to changing ambient temperature, humidity, and overall weight, different materials, densities, thicknesses, and cell sizes of honeycomb cores will be selected. The higher the load and the harsher the environment, the higher the density and hardness of the potting material. However, due to the fluidity of the potting material after mixing, if the honeycomb core cell cannot be filled at once without constraints, air will be trapped inside, and the gas will not be completely discharged during curing, leaving bubbles and collapse inside and on the surface of the potting material. Especially at the bottom of the honeycomb core cell, it is inconvenient to observe from above during potting, and the flatness is very poor after curing.

[0004] The operation of local potting and strengthening of honeycomb cores requires almost no large-scale automated equipment because of the variety, low batch, relatively small size, and variable surface. However, from the perspective of industry practice, traditional operations have some shortcomings, such as the potting position needs to be drawn according to the template, and stickers, tapes or similar items are placed around the potting position to protect the adjacent honeycomb core surface from contamination during operation. The operation is cumbersome, time-consuming, and wasteful, and even filling fails midway. The most critical thing is that it cannot guarantee full filling, no air is trapped in the middle of the material, and the surface quality is 100% qualified. The mixing amount of the potting material is often prepared based on experience in consideration of the loss. Materials are retained on the container, tool surface, and potting periphery, the material utilization rate is low, and the amount cannot be very accurate. Therefore, the honeycomb core no-residue potting mold and process need to be studied urgently. Summary of the invention

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is: a honeycomb core zero-residue potting mold, including a potting mold body, a pressure rod guide lock, a pressure rod block, a connecting rod and a pressure rod handle, the potting mold body is penetrated by a potting material cavity corresponding to the shape of the pressure rod block, the pressure rod guide lock is sleeved on the upper part of the potting mold body, the top of the pressure rod guide lock is provided with a guide channel that is connected to the potting material cavity and corresponds to the shape of the pressure rod block, and the connecting rod is connected between the top of the pressure rod block and the pressure rod handle.

[0006] As an improvement, the bottom surface of the encapsulation mold body is shaped to correspond to the honeycomb core profile.

[0007] As an improvement, a movable insulating material is further provided between the bottom of the potting mold body and the honeycomb core profile.

[0008] As an improvement, the potting process includes the following steps:

[0009] (1) Place removable insulation material on the honeycomb core surface at the potting position;

[0010] (2) placing the potting mold body on the surface of the removable isolation material;

[0011] (3) Fill the potting mold body with the potting material, and scrape the upper surface of the potting material and the upper edge of the potting mold body flat;

[0012] (4) Sleeve the pressure rod guide lock on the upper part of the potting mold body;

[0013] (5) Press the handle of the pressure rod and move the pressure rod pressure block down along the guide channel of the pressure rod guide lock until the bottom surface of the pressure rod pressure block completely contacts the surface of the potting material to ensure that no air is retained;

[0014] (6) extracting the isolation material from the bottom of the potting mold body;

[0015] (7) Press the handle of the pressure rod and press the pressure rod pressure block downward to fill the potting material into the honeycomb core cells;

[0016] (8) Remove all molds and confirm that the surface of the honeycomb core potting position is flat;

[0017] (9) placing an isolation material on the surface of the potting material;

[0018] (10) A pressure equalizing block is placed on the surface of the isolation material, and its lower surface is consistent with the surface curve of the honeycomb core.

[0019] (11) Place sandbags of standard weight on the pressure equalizing block to ensure its stability.

[0020] After adopting the above structure, the present invention has the following advantages: the present invention utilizes movable isolation materials and potting molds to constrain the fluid potting materials before potting, fills and flattens the potting mold body with the potting materials at one time, and makes the pressure rod completely contact the potting materials, without trapped air, thereby solving quality defects, making the honeycomb core cells fully filled, without bubble cavities inside, with a flat surface that matches the required profile, and the potting position and size are accurate; in addition, the mold of the present invention can be designed according to parameters such as the potting position size, shape, and volume, so that the mold and the potting size have the same volume, the required amount of potting material can be accurately calculated, raw materials are saved, the processability is excellent in use, the operation is simple, the labor intensity is low, the material loss is small, and the environment is significantly improved; through the design of the potting mold of the present invention, there is no need to protect it with stickers every time, it is quick and special, the lower surface of the mold matches the required honeycomb core profile, will not cause physical damage to the honeycomb core, and the honeycomb core reinforcement surface does not need to be polished after curing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a honeycomb core zero-residue potting mold and a potting mold in a process of the present invention.

[0022] Figure 2 It is a structural schematic diagram of the honeycomb core zero-residue potting mold and the potting mold in the process of the present invention when in use.

[0023] As shown in the figure: 1. potting mold body, 2. pressure rod guide lock, 3. pressure rod pressure block, 4. connecting rod, 5. potting material cavity, 7. guide channel, 8. honeycomb core surface, 9. movable isolation material. DETAILED DESCRIPTION

[0024] In conjunction with the accompanying drawings, the honeycomb core no-residue potting mold includes a potting mold body 1, a pressure rod guide lock 2, a pressure rod block 3, a connecting rod 4 and a pressure rod handle 5. The potting mold body 1 is penetrated by a potting material cavity 6 corresponding to the shape of the pressure rod block 3. The pressure rod guide lock 2 is sleeved on the upper part of the potting mold body 1. The top of the pressure rod guide lock 2 is provided with a guide channel 7 that is connected to the potting material cavity 6 and corresponds to the shape of the pressure rod block 3. The connecting rod 4 is connected between the top of the pressure rod block 3 and the pressure rod handle 5.

[0025] As a preferred implementation scheme of this embodiment, the bottom surface shape of the encapsulation mold body 1 is set to correspond to the honeycomb core surface 8.

[0026] As a preferred implementation scheme of this embodiment, a movable insulating material 9 is further provided between the bottom of the potting mold body 1 and the honeycomb core surface 8 .

[0027] As a preferred implementation scheme of this embodiment, the encapsulation process includes the following steps:

[0028] (1) placing a removable insulating material 9 on the honeycomb core surface 8 at the potting position;

[0029] (2) placing the encapsulation mold body 1 on the surface of the movable isolation material 9;

[0030] (3) Fill the potting mold body 1 with the potting material, and scrape the upper surface of the potting material and the upper edge of the potting mold body 1 flat;

[0031] (4) Sleeve the pressure rod guide lock 2 onto the upper part of the potting mold body 1;

[0032] (5) Press the lever handle 5 to move the lever block 3 downward along the guide channel 7 of the lever guide lock 2 until the bottom surface of the lever block 3 completely contacts the surface of the potting material to ensure that no air is retained;

[0033] (6) extracting the isolation material 9 from the bottom of the potting mold body 1;

[0034] (7) Press the pressure rod handle 5 and press the pressure rod pressing block 3 to fill the potting material into the honeycomb core cells;

[0035] (8) Remove all molds and confirm that the surface of the honeycomb core potting position is flat;

[0036] (9) placing an isolation material 9 on the surface of the potting material;

[0037] (10) A pressure equalizing block is placed on the surface 9 of the isolation material, and its lower surface is consistent with the curve of the honeycomb core surface.

[0038] (11) Place sandbags of standard weight on the pressure equalizing block to ensure its stability.

[0039] The present invention uses the periphery of the potting mold body and the movable isolation material at the bottom of the mold to limit the fluidity of the potting material before potting. Before potting (before the isolation material is extracted from the potting material and the mold), the potting pressure rod is in direct contact with the potting material, no air is retained at the contact interface, and the pressure rod contacts the potting material interface to form a vacuum interface; when the isolation material is extracted, the potting material will not fall off because the atmospheric pressure acts equally on the pressure rod and the bottom of the potting material; when pressure is applied downward, the pressure rod pushes the potting material downward to fill into the honeycomb core cell without entraining air. The present invention uses the movable isolation material and the potting mold to constrain the potting material with fluidity before potting, fills the potting material and flattens the mold body at one time, the pressure rod completely contacts the potting material, no air is retained, and the biggest benefit is that the quality defects are solved, the honeycomb core cell is filled fully, there is no bubble cavity inside, the surface is flat and matches the required profile, and the potting position and size are accurate.

[0040] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A honeycomb core zero-residue potting process, characterized in that: The following steps are involved: (1) Place removable insulation material on the honeycomb core surface at the potting position; (2) Placing the potting mold body on the surface of the removable isolation material; (3) Fill the potting mold body with the potting material, and scrape the upper surface of the potting material and the upper edge of the potting mold body flat; (4) Sleeve the pressure rod guide lock onto the upper part of the potting mold body; (5) Press the handle of the pressure rod and move the pressure rod pressure block down along the guide channel of the pressure rod guide lock until the bottom surface of the pressure rod pressure block completely contacts the surface of the potting material to ensure that no air is retained; (6) Extract the isolation material from the bottom of the potting mold body; (7) Press the handle of the pressure rod and press the pressure rod pressure block to fill the potting material into the honeycomb core cells; (8) Remove all molds and confirm that the surface of the honeycomb core potting position is flat; (9) Placing an isolation material on the surface of the potting material; (10) A pressure equalizing block is placed on the surface of the isolation material, and its lower surface is consistent with the surface curve of the honeycomb core; (11) Place sandbags of standard weight on the pressure equalizing block to ensure its stability; The honeycomb core zero-residue potting process uses the following potting mold: comprising a potting mold body, a pressure rod guide lock, a pressure rod block, a connecting rod and a pressure rod handle, the potting mold body is provided with a potting material cavity corresponding to the shape of the pressure rod block, the pressure rod guide lock is sleeved on the upper part of the potting mold body, the top of the pressure rod guide lock is provided with a guide channel connected to the potting material cavity and corresponding to the shape of the pressure rod block, and the connecting rod is connected between the top of the pressure rod block and the pressure rod handle; The bottom surface of the potting mold body is shaped to correspond to the honeycomb core surface; A movable insulating material is also provided between the bottom of the potting mold body and the honeycomb core profile.

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