Water-stopping rubber entrance packing for shield tunneling construction.

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Entrance packing for construction work, shield construction work.

last updated：Feb 20, 2023

木本ゴム工業本社

Official site

Promotional construction shield work entrance packing, with an annual record of 20,000 pieces, manufactured in-house with short delivery times.

Our entrance packing utilizes years of experience and achievements, featuring a unique rubber formulation specifically designed for entrance packing. The strength differs from that of general rubber sheets. A word from our representative: Recently, there has been an increase in construction projects at great depths and in poor ground conditions, which often leads to issues with groundwater and rubber damage. In such cases, we highly recommend trying our KE-A and KE-M packings. They will deliver performance that meets your satisfaction.

Related Link - http://www.kimoto-gomu.co.jp/index.php?id=entra

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basic information

Shield construction, entrance packing properties for thrust construction, strength ○ Material KE-A (super abrasion-resistant): Hardness (HA) 50±5°, tensile strength (MPa) 22 or more, elongation rate 600% or more, top specification entrance packing ○ Material KE-M (abrasion-resistant): Hardness (HA) 60±5°, tensile strength (MPa) 15 or more, elongation rate 500% or more, our standard packing, suitable for water-rich sites ○ Material KE-N (natural): Hardness (HA) 55±5°, tensile strength (MPa) 7 or more, elongation rate 350% or more, uniquely formulated natural rubber for general thrust use ● For more details, please contact us or refer to the catalog.

Price information

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Delivery Time

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Applications/Examples of results

Various entrance packing for promotion construction and shield construction Vertical hole ● For more details, please contact us.

Detailed information

Entrance Packing Manufacturing Method Let's take the example of manufacturing an oval packing with an outer diameter of 2m or more. The process of product manufacturing varies depending on the shape and dimensions of the packing. 1. CAD Drawing We check the drawings and CAD data received from the customer. 2. Creation of a Template We send the data from step 1 to a plotter to create a template. 3. Manufacturing the Sector-Shaped Packing We vulcanize the packing using a mold with approximate dimensions. 4. Jointing We process the sector-shaped packing made in step 3 to connect them together. After that, we integrate the sector-shaped packing using vulcanized joints. (For small diameters, it is a single piece.) 5. Processing (Cutting, etc. Final Finishing) We align the template from step 2 with the joined packing from step 4 and cut it. It will be the same as the packing drawn in step 1. 6. Completion
Arrange the material in the mold set on the entrance packing compression molding machine.
Heat and pressure are applied to the compression molding machine to perform vulcanization molding. Vulcanization molding is complete, and the materials are integrated.
One part of the extracted entrance packing.
To shape the entrance packing into a circular form, the molded parts are set in the joint molding device, and vulcanized joint molding is performed.
State of entrance packing with vulcanized joints.
After vulcanizing the entrance packing into a circular shape, hole processing, surface finishing, and deburring will be carried out.
The entrance packing has been completed. The image this time is oval-shaped. You can see that it is oval when viewed from above.