Novel yellow-green tube forming machine head
By introducing a flow-dividing structure with a 60-degree cone angle and a 45-degree included angle in the yellow-green tube forming head, combined with heating and temperature measuring devices, the problem of insufficient fusion of green raw materials was solved, achieving uniform dispersion of green strips and mold versatility, thereby improving product quality and reducing production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- UNION POLYMER MATERIAL (DALIAN) CO LTD
- Filing Date
- 2025-04-27
- Publication Date
- 2026-04-28
AI Technical Summary
In existing yellow-green tube forming machines, the green raw material fails to fully fuse in the early stages of forming, resulting in raised green stripes on the surface of the finished product. Furthermore, different sizes of finished products require specialized molds, increasing management and production costs.
A novel yellow-green tube forming head was designed, which adopts a 60-degree cone-shaped flow divider cone and a 45-degree angled flow divider circular hole structure. Combined with the confluence channel, it extends the material fusion time and ensures the material melt state through heaters and temperature measuring holes. The green flow divider inner core with clearance fit can be customized and replaced, reducing the mold specialization.
It improves the uniform dispersion of green raw materials, reduces the phenomenon of green stripes protruding on the surface of finished products, lowers mold replacement costs, and improves product appearance quality and production efficiency.
Smart Images
Figure CN224170429U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of plastic molding die technology, and in particular to a novel yellow-green tube forming head. Background Technology
[0002] Plastic molding dies are tools used in the plastics processing industry in conjunction with plastic molding machines to give plastic products a complete shape and precise dimensions. Extrusion molding dies are a type of mold used to form and produce plastic products with continuous shapes. They are also called extrusion molding die heads and are widely used in the processing of pipes, rods, monofilaments, sheets, films, wire and cable sheathing layers, and profiles.
[0003] The existing production equipment is a plastic extruder. The working principle is that solid plastic is melted and plasticized under the conditions of heating and the screw rotation of the extruder, and then made into continuous plastic products with the same cross-section as the die shape by passing through a die of a specific shape.
[0004] Yellow-green tubes are a type of plastic pipe. Currently, most yellow-green tube forming heads on the market are pre-forming heads. Due to the structural characteristics of pre-forming heads, the yellow and green raw materials merge prematurely in the early stage of forming. Under the condition of high-speed extrusion, the two colored raw materials do not fully fuse before entering the forming stage. Due to insufficient fusion time and poor fusion degree, the green raw material cannot be evenly dispersed in the overall structure, resulting in green stripe protrusions on the surface of the finished product. At the same time, each specification and size of the finished product requires a specially matched mold with a specific structure that is different from that of normal single-walled tubes. This requires a large investment in custom-made molds, and the diverse mold structures are not easy to manage, increasing management costs. Therefore, a new type of yellow-green tube forming head is proposed. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a novel yellow-green tube forming head, which aims to improve the problems in the existing technology where the green raw material cannot be evenly dispersed in the overall structure, resulting in green strip protrusions and high mold replacement costs.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A novel yellow-green tube forming machine head includes a connecting sleeve, a flow divider cone support body, a machine head body, a green flow divider inner core, a core mold, a die, a die cap, a yellow inlet, a green inlet, a yellow flow divider channel, a green flow divider channel, a confluence channel, and a forming channel. The connecting sleeve and the flow divider cone support body are connected by a first fastening screw, the machine head body and the flow divider cone support body are connected by a second fastening screw, and the die and the die cap are connected to the machine head body by a third fastening screw. The flow divider cone support body and the core mold are connected in sequence. The flow divider cone support body, the green flow divider inner core, the machine head body, the die, and the die cap are connected in sequence. A yellow feed port is opened at the end of the connecting sleeve away from the flow divider cone support body. A green feed port is provided on the outside of the machine head body. The yellow feed port, the yellow flow divider channel, the merging channel, and the forming channel are connected in sequence. The green feed port, the green flow divider channel, the merging channel, and the forming channel are connected in sequence.
[0008] As a further description of the above technical solution:
[0009] The end of the diversion cone support body near the connecting sleeve is configured as a diversion cone with a 60-degree cone angle.
[0010] As a further description of the above technical solution:
[0011] The front end of the green diversion inner core is specifically configured as four diversion circular holes arranged in a circular shape from the outside to the inside, and inclined at a 45-degree angle to the merging flow channel.
[0012] As a further description of the above technical solution:
[0013] Temperature measuring holes are provided on the outer side of the connecting sleeve, the diverting cone support body, the machine head body, and the die.
[0014] As a further description of the above technical solution:
[0015] The green diverter core is fitted with the head body with a clearance, and the green diverter core can be customized and replaced according to different requirements for the width of the green strip.
[0016] As a further description of the above technical solution:
[0017] Both the diversion cone support body and the core mold have interconnected ventilation holes inside.
[0018] As a further description of the above technical solution:
[0019] An adjusting screw is installed in the middle of the die cap, and the adjusting screw is tangent to the die.
[0020] As a further description of the above technical solution:
[0021] A connecting sleeve heater is installed on the outside of the connecting sleeve, a flow divider cone support body heater is installed on the outside of the flow divider cone support body, a machine head body heater is installed on the outside of the machine head body, and a die nozzle heater is installed on the outside of the die nozzle.
[0022] This utility model has the following beneficial effects:
[0023] 1. In this utility model, by setting the yellow raw material diversion cone support body at one end near the connecting sleeve and forming a diversion cone structure with a 60-degree cone angle, combined with the design of four diversion circular holes evenly distributed around the front end of the green diversion inner core and inclined at a 45-degree angle to the merging channel, and with the rear-mounted merging channel, the yellow and green raw materials can be fully diverted before merging under high-speed extrusion conditions. This helps to extend the material fusion time, improves the problem of the green raw material not being evenly dispersed due to premature merging of the front molding head, and thus reduces the phenomenon of green stripe protrusion on the surface of the finished product, effectively improving the appearance quality of the product.
[0024] 2. In this utility model, by designing the connection method between components such as the connecting sleeve, the diverting cone support body, the die head body, the green diverting inner core, the core mold, the die, and the die cap, as well as the connection relationship between the yellow feed port, the green feed port, the yellow diverting channel, the green diverting channel, the merging channel, and the forming channel, the yellow-green tube forming die head can use the same mold as conventional single-wall tube extrusion, breaking the complex form of conventional yellow-green tubes requiring special molds for merging, thereby reducing the high cost of customizing a large number of special molds for the production of yellow-green tubes of different specifications. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the ventilation holes of an improved nursing restraint sleeve proposed in this utility model;
[0026] Figure 2 This is a schematic diagram of the molding flow channel of an improved nursing restraint sheath proposed in this utility model.
[0027] Legend:
[0028] 1. Connecting sleeve; 2. Connecting sleeve heater; 3. Temperature measuring hole; 4. Diverter cone support body; 5. Diverter cone support body heater; 6. Fastening screw two; 7. Machine head body; 8. Machine head body heater; 9. Green diverter inner core; 10. Core mold; 11. Adjusting screw; 12. Die cap; 13. Fastening screw three; 14. Die; 15. Die heater; 16. Forming flow channel; 17. Merging flow channel; 18. Green diverter flow channel; 19. Yellow diverter flow channel; 20. Yellow feed inlet; 21. Green feed inlet; 22. Vent hole; 23. Fastening screw one. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0030] Reference Figures 1-2 This utility model provides an embodiment of a novel yellow-green tube forming machine head, comprising a connecting sleeve 1, a diversion cone support body 4, a machine head body 7, a green diversion inner core 9, a core mold 10, an orifice mold 14, an orifice mold cap 12, a yellow feed port 20, a green feed port 21, a yellow diversion channel 19, a green diversion channel 18, a confluence channel 17, and a forming channel 16. The connecting sleeve 1 and the diversion cone support body 4 are connected by a first fastening screw 23, the machine head body 7 and the diversion cone support body 4 are connected by a second fastening screw 6, and the orifice mold 14 and the orifice mold cap 12 are connected to the machine head body 7 by a third fastening screw 13. The connecting sleeve 1, the diversion cone support body 4, and the core mold 10 are connected in sequence. The diversion cone support body 4, the green diversion inner core 9, the machine head body 7, the orifice mold 14, and the orifice mold cap 12 are connected in sequence. The molding caps 12 are connected in sequence. The end of the connecting sleeve 1 away from the diversion cone support body 4 is provided with a yellow inlet 20. The outer side of the machine head body 7 is provided with a green inlet 21. The yellow inlet 20, the yellow diversion channel 19, the merging channel 17 and the forming channel 16 are connected in sequence. The green inlet 21, the green diversion channel 18, the merging channel 17 and the forming channel 16 are connected in sequence. The end of the diversion cone support body 4 near the connecting sleeve 1 is set as a diversion cone with a 60-degree cone angle. The front end of the green diversion inner core 9 is set as 4 diversion circular holes distributed in a circular shape from the outside to the inside, and inclined at a 45-degree angle to the merging channel 17. The green diversion inner core 9 and the machine head body 7 are fitted with a clearance fit. The green diversion inner core 9 can be customized and replaced according to the different requirements of the green strip width.
[0031] Specifically, the yellow feed inlet 20 allows the yellow raw material to precisely enter the diversion cone support body 4. The diversion cone support body 4, near the connecting sleeve 1, is specially designed as a diversion cone with a 60-degree cone angle, guiding the yellow raw material to be evenly diverted along the yellow diversion channel 19. This effectively increases the contact area and dispersion of the yellow raw material before it merges with the subsequent green raw material. A green feed inlet 21 is opened on the outside of the head body 7, allowing the green raw material to enter smoothly. The front end of the green diversion inner core 9 has four diversion holes evenly distributed around the circumference and forming a 45-degree angle with the merging channel 17, which facilitate the flow of the green raw material. The yellow and green raw materials are finely diverted, optimizing the flow direction and distribution of the green raw materials. After the diversion, the yellow and green raw materials flow through the yellow diversion channel 19 and the green diversion channel 18 respectively, and then merge through the merging channel 17. This allows the two raw materials more time to mix and blend before entering the molding channel 16, which helps reduce the green stripe protrusion on the finished product surface and greatly improves the product appearance quality. Under the synergistic effect of the diversion cone support body 4 and the machine head body 7, the material flow speed is accelerated, and the material enters the molding channel 16 efficiently, which helps to improve product quality.
[0032] Reference Figure 1 -and Figure 2 Temperature measuring holes 3 are provided on the outside of the connecting sleeve 1, the diverter cone support body 4, the machine head body 7, and the die 14. Ventilation holes 22 are provided inside the diverter cone support body 4 and the core mold 10. An adjusting screw 11 is installed in the middle of the die 12. The adjusting screw 11 is tangent to the die 14. A connecting sleeve heater 2 is installed on the outside of the connecting sleeve 1. A diverter cone support body heater 5 is installed on the outside of the diverter cone support body 4. A machine head body heater 8 is installed on the outside of the machine head body 7. A die 14 heater 15 is installed on the outside of the die 14.
[0033] Specifically, by installing heaters on the outside of components such as the connecting sleeve 1, the material is continuously and stably heated to maintain its suitable melting state, avoiding molding defects caused by uneven temperature and ensuring product quality stability. By setting temperature measuring holes 3 on the outside of components such as the connecting sleeve 1, the temperature is monitored accurately in real time, and the temperature of each flow channel is adjusted in a timely manner based on feedback to optimize material flow and fusion. By setting vent holes 22 in the diverter cone support body 4 and the core mold 10, the air pressure inside the pipe is kept stable, improving the overall quality of the product. By setting the green diverter inner core 9 and the head body 7 with a clearance fit, it is easy to customize and replace as needed, improving the adaptability of the molding head to different green strip width specifications. By designing the structure of the connecting die cap 12 and the head body 7 with the fastening screw three 13, it is easy to disassemble and replace the die 14, reducing the difficulty and cost for enterprises to replace molds for different specifications of yellow-green tubes, and improving production efficiency. By setting the adjusting screw 11 on the die cap 12 and tangent to the die 14, the uniformity of the product wall thickness can be quickly adjusted to meet the needs of different application scenarios and enhance the product's market competitiveness.
[0034] Working principle: Yellow raw material enters through the yellow inlet 20 of the connecting sleeve 1. Inside the diversion cone support body 4, it is diverted along the yellow diversion channel 19 by the diversion cone with a 60-degree cone angle near the end of the connecting sleeve 1. Green raw material enters from the green inlet 21 outside the machine head body 7. It is diverted through the four diversion holes at the front end of the green diversion inner core 9, which are distributed in a circular shape and form a 45-degree angle with the confluence channel 17. The diverted yellow and green raw materials flow through the yellow diversion channel 19 and the green diversion channel 18 respectively, and then merge at the confluence channel 17. The rear confluence point makes the raw materials more fully integrated. Under the action of the diversion cone support body 4 and the machine head body 7, the material is accelerated into the molding channel 16 for plasticizing and molding, producing the finished yellow-green tube.
[0035] The connecting sleeve heater 2 heats each component to maintain the melting of the material. The temperature measuring hole 3 on the outside of the connecting sleeve 1 monitors the temperature and precisely controls the temperature of each flow channel. The vent hole 22 inside the flow divider cone support body 4 and the core mold 10 ensures stable air pressure inside the pipe and guarantees the quality of the finished product. If the width of the green strip needs to be adjusted, the green flow divider inner core 9 can be customized and replaced. To meet the production needs of different specifications, the fastening screw 13 is removed, the die cap 12 is removed, and the die 14 is replaced. The adjusting screw 11 on the die cap 12 can be rotated to adjust the uniformity of the product wall thickness.
[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A novel yellow-green tube forming head, comprising a connecting sleeve (1), a diversion cone support body (4), a head body (7), a green diversion inner core (9), a core mold (10), a die (14), a die cap (12), a yellow feed inlet (20), a green feed inlet (21), a yellow diversion channel (19), a green diversion channel (18), a merging channel (17), and a forming channel (16), characterized in that: The connecting sleeve (1) and the diverter cone support body (4) are connected by fastening screw one (23), the machine head body (7) and the diverter cone support body (4) are connected by fastening screw two (6), the die (14) and the die cap (12) are connected to the machine head body (7) by fastening screw three (13), the connecting sleeve (1), the diverter cone support body (4), and the core mold (10) are connected in sequence, the diverter cone support body (4), the green diverter inner core (9), the machine head body (7), and the die cap (10) are connected in sequence. The mold (14) and the die cap (12) are connected in sequence. The connecting sleeve (1) has a yellow feed port (20) at the end away from the diversion cone support body (4). The machine head body (7) has a green feed port (21) on the outside. The yellow feed port (20), the yellow diversion channel (19), the merging channel (17) and the forming channel (16) are connected in sequence. The green feed port (21), the green diversion channel (18), the merging channel (17) and the forming channel (16) are connected in sequence.
2. The novel yellow-green tube forming head according to claim 1, characterized in that: The end of the diversion cone support body (4) near the connecting sleeve (1) is configured as a diversion cone with a cone angle of 60 degrees.
3. The novel yellow-green tube forming head according to claim 1, characterized in that: The front end of the green diversion inner core (9) is specifically set as 4 diversion circular holes arranged in a circular shape from the outside to the inside, and inclined at a 45-degree angle to the merging channel (17).
4. The novel yellow-green tube forming head according to claim 1, characterized in that: Temperature measuring holes (3) are provided on the outer sides of the connecting sleeve (1), the diverting cone support body (4), the machine head body (7), and the die (14).
5. The novel yellow-green tube forming head according to claim 1, characterized in that: The green diversion inner core (9) and the machine head body (7) are fitted with a clearance. The green diversion inner core (9) can be customized and replaced according to the different requirements of the green strip width.
6. The novel yellow-green tube forming head according to claim 1, characterized in that: Both the diversion cone support body (4) and the core mold (10) are provided with interconnected ventilation holes (22).
7. The novel yellow-green tube forming head according to claim 1, characterized in that: An adjusting screw (11) is installed in the middle of the die cap (12), and the adjusting screw (11) is tangent to the die (14).
8. The novel yellow-green tube forming head according to claim 1, characterized in that: A connecting sleeve heater (2) is installed on the outside of the connecting sleeve (1), a flow divider cone support body heater (5) is installed on the outside of the flow divider cone support body (4), a machine head body heater (8) is installed on the outside of the machine head body (7), and a die mold heater (15) is installed on the outside of the die mold (14).