{"id":17237,"date":"2026-09-17T22:48:19","date_gmt":"2026-09-17T14:48:19","guid":{"rendered":"https:\/\/hkcablemachine.com\/?p=17237"},"modified":"2026-09-17T22:48:19","modified_gmt":"2026-09-17T14:48:19","slug":"cable-extrusion-defects-troubleshooting","status":"publish","type":"post","link":"https:\/\/hkcablemachine.com\/pt\/cable-extrusion-defects-troubleshooting\/","title":{"rendered":"Defeitos na Extrus\u00e3o de Cabos: Material, Processo ou M\u00e1quina?"},"content":{"rendered":"

When bubbles, a rough surface or uneven dimensions appear during cable extrusion, the production team needs to know what to check first. Changing several settings at once can make the cause harder to find.<\/p>\n

Start by checking the cable compound, its preparation and the stability of the extrusion process. If the cause remains unclear, retain material and cable samples with the operating records so the material supplier and equipment supplier can investigate the same problem.<\/strong><\/p>\n

This guide is for factories making solid insulation or solid cable jackets. Use the approved cable drawing to define the defect; a deliberately foamed insulation construction needs a different assessment.<\/p>\n

Comece com o Material e seus Registros de Secagem<\/h2>\n

Before adjusting the extruder, identify exactly what went into the hopper. Record the compound supplier, grade and batch, and confirm whether the material is virgin, recycled or a declared blend. \u201cPVC,\u201d \u201cPE\u201d or \u201ccable material\u201d alone does not identify a production batch.<\/p>\n

Check the purchase specification against the bag label and supplier documents. Confirm that the grade is intended for the cable layer being made. An unfamiliar or untraceable batch deserves investigation even when the machine settings have not changed.<\/p>\n

This material-first check reflects HONGKAI’s practical troubleshooting approach: examine material quality and preparation together with the consistency of the extruded output before deciding that equipment needs repair. It is a starting point for diagnosis, not a guarantee that good-looking material will produce compliant cable.<\/p>\n

Verifique as condi\u00e7\u00f5es de secagem, n\u00e3o apenas o tempo decorrido<\/h3>\n

Where the material supplier requires drying, compare the actual preparation with the instructions for that exact grade. Record the drying equipment, conditions, duration and handling between drying and feeding. If a moisture result is needed, agree on the measurement method with the material supplier.<\/p>\n

\u201cIt was dried for a long time\u201d is not the same as a verified material condition. Do not invent one drying temperature or time for every cable compound, and do not keep extending the cycle without checking the supplier’s instructions.<\/p>\n

Trate uma amostra semelhante a um favo de mel como uma pista<\/h3>\n

Peter’s experience highlights a useful warning sign: a material may still produce a porous, honeycomb-like result after a drying attempt. At that point, retain the sample and investigate the compound rather than assuming that more drying will solve the problem.<\/p>\n

The appearance alone does not prove that the material is recycled or identify the root cause. HMEL’s wire-and-cable extrusion guide lists both moisture and excessive temperature among possible causes of holes and bubbles.1<\/a><\/sup> \u00c9 por isso que a investiga\u00e7\u00e3o necessita do hist\u00f3rico do material e do registro de processamento, bem como do defeito vis\u00edvel.<\/p>\n

\"AI-generated<\/p>\n

AI-generated illustration, not a photograph or test result. Left: uniform solid appearance. Right: illustrative voids in the insulation. The shapes are not to scale and do not identify a material grade, recycled content or the cause of a defect.<\/em><\/p>\n

Ask the material supplier to confirm the grade, declared composition and suitability for the application. Whether recycled content is allowed is a question for the cable specification and material approval, not something a photograph can settle.<\/p>\n

Separar as Preocupa\u00e7\u00f5es com o Material da Instabilidade do Processo<\/h2>\n

Suitable material and steady extrusion are useful starting conditions. They do not, by themselves, prove that every cable requirement has been met. Compare what happened before and after the defect appeared.<\/p>\n

Did the problem start with a new material batch? After a restart? After a tooling or recipe change? Or does the symptom appear and disappear while the recorded settings remain unchanged? These observations help decide which evidence to collect next.<\/p>\n

Utilize a tabela para organizar a investiga\u00e7\u00e3o. As verifica\u00e7\u00f5es n\u00e3o s\u00e3o diagn\u00f3sticos confirmados nem instru\u00e7\u00f5es para alterar uma configura\u00e7\u00e3o.<\/p>\n\n\n\n\n\n\n\n\n
Observation<\/th>\nEvid\u00eancia para comparar primeiro<\/th>\nO que a observa\u00e7\u00e3o n\u00e3o prova<\/th>\n<\/tr>\n<\/thead>\n
Bolhas ou uma estrutura semelhante a um favo de mel em uma camada especificada como s\u00f3lida<\/td>\nLote do material afetado, registros de secagem, temperaturas de processamento e amostras correspondentes de cabos<\/td>\nQue o material deve ser reciclado ou que a secagem insuficiente \u00e9 a \u00fanica causa<\/td>\n<\/tr>\n
O di\u00e2metro externo acabado aumenta e diminui<\/td>\nLeituras de di\u00e2metro em rela\u00e7\u00e3o aos registros de velocidade do parafuso, da tra\u00e7\u00e3o e do enrolamento, quando dispon\u00edveis<\/td>\nQual componente da m\u00e1quina falhou<\/td>\n<\/tr>\n
O di\u00e2metro externo est\u00e1 aceit\u00e1vel, mas a isola\u00e7\u00e3o \u00e9 mais fina em um dos lados<\/td>\nMedi\u00e7\u00f5es de se\u00e7\u00e3o transversal e quaisquer registros adequados de espessura de parede ou excentricidade<\/td>\nQue um di\u00e2metro aceit\u00e1vel significa que o condutor est\u00e1 centralizado<\/td>\n<\/tr>\n
Rugosidade ou part\u00edculas vis\u00edveis aparecem ap\u00f3s uma altera\u00e7\u00e3o de lote ou configura\u00e7\u00e3o<\/td>\nAmostras antes e depois, identidade do material e a sequ\u00eancia de altera\u00e7\u00f5es<\/td>\nSe o material ou equipamento \u00e9 respons\u00e1vel sem inspe\u00e7\u00e3o adicional<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

A HMEL tamb\u00e9m identifica parafuso inst\u00e1vel ou velocidade da linha como poss\u00edveis fatores contribuintes para di\u00e2metro irregular.1<\/a><\/sup> Use essa rela\u00e7\u00e3o para comparar o comportamento registrado, n\u00e3o para presumir que um motor, inversor ou parafuso precise ser substitu\u00eddo.<\/p>\n

Keep diameter and eccentricity separate. Eccentricity means the conductor or core is off-center within the applied layer. SIKORA explains that comparing laser diameter measurements before and after extrusion can estimate wall thickness, but does not measure eccentricity.2<\/a><\/sup> Utilize um m\u00e9todo de medi\u00e7\u00e3o adequado \u00e0 caracter\u00edstica em investiga\u00e7\u00e3o.<\/p>\n

\"AI-generated<\/p>\n

AI-generated illustration, not measured samples. The outer diameter is the same in both examples, but the off-center conductor on the right leaves an uneven insulation wall. No dimensions or acceptance tolerances are implied.<\/em><\/p>\n

For a comparison trial, agree on an appropriate reference material and an approved process with the responsible engineers. Record each planned change and retain the resulting sample. If a different grade needs a different recipe, record both changes; that trial is not a clean comparison of material alone.<\/p>\n

A better result with the reference material directs attention toward the suspect material or its processing requirements. It does not automatically certify the machine as fault-free. A defect that remains with the reference material still needs a review of preparation, operating conditions and equipment behavior.<\/p>\n

N\u00e3o confunda o revestimento do cabo com a fabrica\u00e7\u00e3o do pr\u00f3prio composto. O compara\u00e7\u00e3o entre rotas de extrus\u00e3o de cabos e produ\u00e7\u00e3o de compostos<\/a> explica por que essas s\u00e3o tarefas de fabrica\u00e7\u00e3o separadas.<\/p>\n

Note: Keep checks within the machine’s operating and safety instructions. Intrusive inspection, cleaning or repair requires qualified personnel and the approved isolation procedure; a troubleshooting article is not permission to open running or pressurized equipment.<\/p>\n

Enviar amostras que o fornecedor possa comparar<\/h2>\n

A useful support request connects the problem material, the defective cable and the conditions that produced it. Photos help explain the symptom; identified samples allow a more detailed examination.<\/strong><\/p>\n

Peter recommends supplying samples so the material characteristics and the equipment’s processing behavior can be considered together. Ask the receiving supplier what sample quantity, packaging and preparation are needed before dispatch. A sample can support diagnosis, but it cannot establish every aspect of machine condition without operating evidence or further tests.<\/p>\n

Prepare o seguinte, onde dispon\u00edvel:<\/p>\n