{"id":5720,"date":"2026-09-29T00:42:36","date_gmt":"2026-09-29T00:42:36","guid":{"rendered":"https:\/\/miyodamachine.com\/?p=5720"},"modified":"2026-09-30T06:39:35","modified_gmt":"2026-09-30T06:39:35","slug":"evaluate-injection-moulding-machine-soft-tube","status":"publish","type":"post","link":"https:\/\/miyodamachine.com\/ja\/evaluate-injection-moulding-machine-soft-tube\/","title":{"rendered":"Injection Moulding Machine Buyer’s Guide for Soft Tubes"},"content":{"rendered":"
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How to Evaluate Injection Moulding Machine Products for Your Plant: A Strategic Buyer’s Guide for Soft Tube Producers & Industry Partners<\/h2>\n

\"Tube<\/p>\n

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1. Aligning Machine Investment with Business Outcomes<\/h2>\n

Every soft tube has an injection-moulded part at its business end: the shoulder<\/strong>. This is the cone-shaped top with the threaded neck and opening. It is where the tube meets the cap, and it is where the filling machine grips the tube.<\/p>\n

If the shoulder is off by a fraction of a millimetre, problems pile up further down the line. Caps sit crooked, torque tests fail, filling chucks miss, and tubes leak in transit. Your injection moulding machine is the part of the line that prevents all of that.<\/p>\n

That’s why picking this machine is more than a price comparison. Three numbers decide whether the investment pays off:<\/p>\n

\n\n\n\n\n\n\n\n
Decision Driver<\/th>\nWhat It Means in Plain Terms<\/th>\nWhy It Matters<\/th>\n<\/tr>\n<\/thead>\n
ROI (Return on Investment)<\/strong><\/td>\nHow fast the machine pays back its cost<\/td>\nTells you if the purchase makes financial sense<\/td>\n<\/tr>\n
Uptime<\/strong><\/td>\nThe share of scheduled hours the machine actually runs<\/td>\nEvery stopped hour stops the whole tube line<\/td>\n<\/tr>\n
Quality consistency<\/strong><\/td>\nHow closely each shoulder matches the last one<\/td>\nDrives scrap rate, customer complaints, and audit results<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Here’s an example of how much is at stake. A plant making 500,000 tubes a month at roughly $0.18 of material per tube loses about $4,500 a month for every 5 points of yield it gives away. That money goes straight into the scrap bin.<\/p>\n

This guide takes you through what to check, section by section, whether you’re buying for your own plant or recommending machines to clients as a distributor or agent. At \u30df\u30e8\u30c0\u30fb\u30d1\u30c3\u30b1\u30fc\u30b8\u30f3\u30b0\u30fb\u30de\u30b7\u30ca\u30ea\u30fc<\/a>, these are the same questions our engineers work through with buyers before any quotation goes out.<\/p>\n

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Industry insight:<\/strong> On most soft tube lines, the heading\/shoulder station sets the speed limit for the whole line. Extruders and printers usually have spare capacity. The injection station usually doesn’t. Get this machine right and the rest of the line can run at full speed.<\/p>\n<\/blockquote>\n

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2. Define Your Production Requirements: Build a Customized Buying Checklist<\/h2>\n

Most disappointing purchases trace back to a vague specification. “We need a fast machine” won’t get you a useful quote. “We need 60 tubes per minute of 35 mm LDPE tubes with M10 threads, on two shifts” will.<\/p>\n

Step 1: Set Your Output Targets<\/h3>\n

Start with real numbers and work backwards:<\/p>\n

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  1. Daily target:<\/strong> for example, 50,000 tubes per day<\/li>\n
  2. Running hours:<\/strong> 2 shifts \u00d7 8 hours = 16 hours<\/li>\n
  3. Realistic efficiency:<\/strong> plan for about 85%, not 100%<\/li>\n
  4. Required speed:<\/strong> 50,000 \u00f7 (16 \u00d7 0.85) \u2248 3,680 tubes\/hour \u2248 61 tubes\/minute<\/strong><\/li>\n<\/ol>\n

    That last figure is the one to hand to suppliers.<\/p>\n

    Step 2: Specify Your Materials<\/h3>\n
    \n\n\n\n\n\n\n\n\n\n
    Material<\/th>\nCommon Use<\/th>\nWhat to Check on the Machine<\/th>\n<\/tr>\n<\/thead>\n
    LDPE<\/strong> (low-density polyethylene)<\/td>\nSoft, squeezable cosmetic tubes<\/td>\nStable melt at 180\u2013230 \u00b0C<\/td>\n<\/tr>\n
    HDPE<\/strong> (high-density polyethylene)<\/td>\nStiffer shoulders, better barrier<\/td>\nHigher injection pressure capability<\/td>\n<\/tr>\n
    PP<\/strong> (polypropylene)<\/td>\nRigid threads for flip-top caps<\/td>\nTighter temperature control, 220\u2013270 \u00b0C<\/td>\n<\/tr>\n
    Multi-layer co-extruded bodies<\/strong><\/td>\nBarrier tubes for sensitive formulas<\/td>\nProven shoulder bonding to the outer layer<\/td>\n<\/tr>\n
    ABL \/ PBL laminates<\/strong><\/td>\nToothpaste, pharma ointments<\/td>\nBonding without overheating the barrier layer<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    If your tube bodies come from a multi-layer \u30c1\u30e5\u30fc\u30d6\u62bc\u51fa\u6a5f<\/a>, your shoulder resin has to bond to that body’s outer layer, not just to the plastic in general. If you use a laminate tube making machine<\/a> instead, the shoulder bonds mechanically to the PE skin of the laminate. For a clear side-by-side, this overview of ABL vs PBL vs co-extruded tubes<\/a> is worth a read.<\/p>\n

    Step 3: Lock Down Tube Specifications<\/h3>\n