Damping type double-layer co-extrusion molding machine head

Abstract

The utility model relates to the technical field of plastic forming dies, and discloses a damping type double-layer co-extrusion forming machine head. Comprising a connecting sleeve, a machine head body, an inner-layer flow dividing cone, an inner damping body, a middle damping body, an outer damping sleeve, a core mold, a middle mold, a mouth mold, a gland, an outer-layer feeding port, an inner-layer feeding port, an outer-layer flow dividing channel, an inner-layer flow dividing channel, an outer-layer damping channel, an inner-layer damping channel and a forming channel. The middle damping body and the outer damping sleeve are connected through a second fastening screw. According to the utility model, fluid can be shunted through the shunting conical body, and meanwhile, the material flow converging time can be prolonged and the converging pressure can be improved through the outer-layer damping channel, the inner-layer damping channel and the reverse sawtooth-shaped damping structure, so that the production efficiency and the product quality are improved, the yield is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic molding dies, in particular to a damping double-layer co-extrusion molding die head. Background Art

[0002] Plastic molding molds are tools that are used in the plastic processing industry to match plastic molding machines and give plastic products complete configurations and precise dimensions. Extrusion molding molds are a type of mold used to mold and produce plastic products in continuous shapes. They are also called extrusion molding heads and are widely used in the processing of pipes, rods, monofilaments, plates, films, wire and cable coverings, and special-shaped materials.

[0003] The existing production equipment is a plastic extruder, the principle of which is that solid plastic is melted and plasticized under heating and extruder screw rotation and pressure conditions, and is made into a continuous plastic product with the same cross-section as the die through a specific shape of the die. However, there are still some shortcomings in the existing technology. The extrusion molding head has the problem of insufficient pressure and short confluence time, which leads to poor confluence, thereby reducing production efficiency and product quality. Therefore, a damping double-layer co-extrusion molding head is proposed to solve the above problems. Utility Model Content

[0004] In order to make up for the above deficiencies, the utility model provides a damping double-layer co-extrusion molding head, aiming to improve the problem of poor confluence caused by insufficient pressure and short confluence time in the extrusion molding head in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a damping double-layer co-extrusion molding die head, including a connecting sleeve, a die body, an inner layer diverter cone, an inner damping body, an intermediate damping body, an outer damping sleeve, a core mold, a middle mold, a mouth mold, a gland, an outer layer feed port, an inner layer feed port, an outer layer diverter channel, an inner layer diverter channel, an outer layer damping channel, an inner layer damping channel and a molding channel;

[0006] The connecting sleeve and the machine head body are connected by a fastening screw 1, the intermediate damping body and the outer damping sleeve are connected by a fastening screw 2, the mouth die and the pressure cover are connected by a fastening screw 3, the machine head body, the inner diverter cone, the inner damping body and the core mold are connected in sequence, the middle mold is connected to the intermediate damping body, an outer layer feed port is provided at one end of the connecting sleeve away from the machine head body, an inner layer feed port is provided on the outside of the machine head body, the outer layer feed port, the outer layer diverter channel, the outer layer damping channel and the molding channel are connected in sequence, the inner layer feed port, the inner layer diverter channel, the inner layer damping channel and the molding channel are connected in sequence, and the outer layer damping channel and the inner layer damping channel are reverse serrated channels.

[0007] As a further description of the above technical solution:

[0008] One end of the machine head body close to the connecting sleeve is configured as a diverter cone with a cone angle of 60°.

[0009] As a further description of the above technical solution:

[0010] The front end of the inner splitter cone is a splitter cone with a cone angle of 90°.

[0011] As a further description of the above technical solution:

[0012] The middle part of the outer damping sleeve is provided with a first temperature measuring hole and a second temperature measuring hole.

[0013] As a further description of the above technical solution:

[0014] The machine head body and the inner splitter cone are connected by interference fit and full welding.

[0015] As a further description of the above technical solution:

[0016] The nose body, the inner splitter cone, the inner damping body and the core mold have ventilation holes that penetrate each other.

[0017] As a further description of the above technical solution:

[0018] The machine head body is provided with a second adjusting screw, which is in contact with the intermediate damping body; the outer damping sleeve is provided with a first adjusting screw, which is in contact with the die.

[0019] As a further description of the above technical solution:

[0020] The molding machine head is also provided with a shunt section heater and a damping section heater.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, the material flow can be diverted through the diverter cone by setting the diverter cone, and at the same time, under the action of the outer damping channel, the inner damping channel and the reverse serrated damping structure, the material flow confluence time can be increased and the confluence pressure can be increased, which solves the problem of poor confluence caused by insufficient pressure and short confluence time of ordinary double-layer co-extrusion heads, while improving production efficiency and product quality, and at the same time improving the yield rate, thereby reducing production costs.

[0023] 2. In the utility model, the uniformity of the inner layer and the outer layer of the product can be adjusted respectively by rotating the adjusting screw 2 and the adjusting screw 1, thereby improving the quality and dimensional accuracy of the product. The pressure cover can be removed by tightening the screw 2, and the die can be replaced, thereby making better and more diverse products. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The utility model is a plan view of a damping double-layer co-extrusion molding die head.

[0025] Legend:

[0026] 1. Connecting sleeve; 2. Diverter section heater; 3. Fastening screw 1; 4. Machine head body; 5. Vent hole; 6. Inner diverter cone; 7. Inner damping body; 8. Intermediate damping body; 9. Fastening screw 2; 10. Damping section heater; 11. Outer damping sleeve; 12. Core mold; 13. Middle mold; 14. Fastening screw 3; 15. Mouth mold; 16. Pressure cover; 17. Molding channel; 18. Outer damping channel; 19. Temperature measuring hole 1; 20. Inner damping channel; 21. Outer diverter channel; 22. Inner diverter channel; 23. Temperature measuring hole 2; 24. Inner feed port; 25. Outer feed port; 26. Adjusting screw 1; 27. Adjusting screw 2. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Reference Figure 1 The utility model provides an embodiment: a damping double-layer co-extrusion molding die head, including a connecting sleeve 1, a die body 4, an inner layer diverter cone 6, an inner damping body 7, an intermediate damping body 8, an outer damping sleeve 11, a core mold 12, a middle mold 13, a mouth mold 15, a gland 16, an outer layer feed port 25, an inner layer feed port 24, an outer layer diverter channel 21, an inner layer diverter channel 22, an outer layer damping channel 18, an inner layer damping channel 20 and a molding channel 17;

[0029] Reference Figure 1The connecting sleeve 1 and the machine head body 4 are connected by a fastening screw 3, and can be connected to basic machines of different models through the connecting sleeve 1 and the machine head body 4. The end of the machine head body 4 close to the connecting sleeve 1 is set as a diverter cone with a cone angle of 60°. The diverter cone set in the machine head body 4 can divert the material entering through the outer feed port 25. The front end of the inner diverter cone 6 is a diverter cone with a cone angle of 90°. The diverter cone set in the inner diverter cone 6 can divert the material entering through the inner feed port 24. The intermediate damping body 8 and the outer damping sleeve 11 are connected by fastening screws 2 9, and the mouth die 15 and the pressure cover 16 are connected by fastening screws 3 14. The machine head body 4, the inner diverter cone 6, the inner damping body 7 and the core mold 12 are connected in sequence. The machine head body 4 and the inner diverter cone 6 are interference fit and fully welded, which can prevent the problem of falling off and separation between the machine head body 4 and the inner diverter cone 6, and can transmit large torque at the same time.

[0030] Reference Figure 1 The middle mold 13 is connected to the middle damping body 8, an outer layer feed port 25 is provided at one end of the connecting sleeve 1 away from the head body 4, an inner layer feed port 24 is provided on the outside of the head body 4, the outer layer feed port 25, the outer layer diversion channel 21, the outer layer damping channel 18 and the molding channel 17 are sequentially connected, the inner layer feed port 24, the inner layer diversion channel 22, the inner layer damping channel 20 and the molding channel 17 are sequentially connected, and the material will enter the outer layer damping channel 18 and the inner layer damping channel 20 respectively through the outer layer feed port 25 and the inner layer feed port 24. At this time, under the action of the inner damping body 7 and the middle damping body 8, the flow of the material can be accelerated, and then the molding channel 17 can make the material quickly merge, increase the pressure and fusion time of the material flow, make the raw materials merge more fully, thereby solving the problem of poor confluence caused by insufficient pressure and short confluence time of the ordinary double-layer co-extrusion head, improving the efficiency of material production, while improving product quality, and effectively improving the yield rate, thereby reducing production costs.

[0031] Reference Figure 1 The outer damping channel 18 and the inner damping channel 20 are reverse zigzag channels. The head body 4, the inner diverter cone 6, the inner damping body 7 and the core mold 12 are respectively provided with vent holes 5 which are interconnected. The air and moisture squeezed out of the material can be discharged through the vent holes 5, thereby ensuring the surface quality and mechanical properties of the extruded product. The end of the inner damping body 7 is provided with an internal thread, and the end of the middle damping body 8 is provided with an external thread. The pressure cover 16 can be removed by tightening the screws 14, and then the die 15 can be replaced, thereby improving the quality of the product and the accuracy of the size.

[0032] Reference Figure 1A temperature measuring hole 19 and a temperature measuring hole 23 are provided in the middle of the outer damping sleeve 11. The temperature inside the device can be measured through the temperature measuring hole 19 and the temperature measuring hole 23, and then the damping section heater 10 and the diversion section heater 2 can be adjusted according to the temperature required for the material to melt.

[0033] Reference Figure 1 A shunt section heater 2 and a damping section heater 10 are also provided on the molding machine head, and the shunt section heater 2 and the damping section heater 10 can heat the material entering the device to melt it, and then the subsequent extrusion and fusion operation can be carried out.

[0034] Reference Figure 1 An adjusting screw 27 is provided on the head body 4, and the adjusting screw 27 is in contact with the middle damping body 8. An adjusting screw 26 is provided on the outer damping sleeve 11, and the adjusting screw 26 is in contact with the die 15. The uniformity of the inner layer of the product can be adjusted by rotating the adjusting screw 27, and the uniformity of the outer layer of the product can be adjusted by adjusting the screw 26, thereby improving the quality and dimensional accuracy of the product.

[0035] Working principle: Through the connecting sleeve 1 and the die body 4, it can be connected with different types of basic machines. At the same time, under the action of the outer layer feed port 25 and the inner layer feed port 24, the materials can enter the specially designed outer layer damping channel 18 and the inner layer damping channel 20 respectively. When the materials pass through the outer layer damping channel 18 and the inner layer damping channel 20 respectively, the flow of the materials can be accelerated under the action of the inner damping body 7 and the middle damping body 8. Finally, the materials can be fused through the forming channel 17, which increases the pressure and fusion time of the material flow, so that the raw materials can be more fully fused, thereby solving the problem of poor confluence caused by insufficient pressure and short confluence time in ordinary double-layer co-extrusion die heads;

[0036] The inner thread at the end of the inner damping body 7 and the outer thread at the end of the middle damping body 8 can be matched with the core mold 12 and the middle mold 13. At this time, the pressure cover 16 can be removed by tightening the screw three 14, and then the mouth mold 15 can be replaced. At the same time, the materials entering the inner layer feed port 24 and the outer layer feed port 25 will enter the molding channel 17. At this time, better and more diverse products can be combined. The uniformity of the inner layer of the product can be adjusted by adjusting the screw two 27, and the uniformity of the outer layer of the product can be adjusted by adjusting the screw one 26, so as to improve the quality and dimensional accuracy of the product.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A damping double-layer co-extrusion molding die head, comprising a connecting sleeve (1), a die body (4), an inner layer flow dividing cone (6), an inner damping body (7), an intermediate damping body (8), an outer damping sleeve (11), a core mold (12), a middle mold (13), a mouth mold (15), a gland (16), an outer layer feed port (25), an inner layer feed port (24), an outer layer flow dividing channel (21), an inner layer flow dividing channel (22), an outer layer damping channel (18), an inner layer damping channel (20) and a molding channel (17); Features: The connecting sleeve (1) and the machine head body (4) are connected by a fastening screw 1 (3), the intermediate damping body (8) and the outer damping sleeve (11) are connected by a fastening screw 2 (9), the mouth die (15) and the pressure cover (16) are connected by a fastening screw 3 (14), the machine head body (4), the inner diverter cone (6), the inner damping body (7) and the core die (12) are connected in sequence, the middle die (13) is connected to the intermediate damping body (8), and the connecting sleeve (1) is away from the machine head body ( 4) is provided with an outer layer feed port (25), and an inner layer feed port (24) is provided on the outer side of the head body (4); the outer layer feed port (25), the outer layer flow diversion channel (21), the outer layer damping channel (18) and the forming channel (17) are sequentially connected; the inner layer feed port (24), the inner layer flow diversion channel (22), the inner layer damping channel (20) and the forming channel (17) are sequentially connected; and the outer layer damping channel (18) and the inner layer damping channel (20) are reverse zigzag channels.

2. A damping double-layer co-extrusion molding die head according to claim 1, characterized in that: One end of the machine head body (4) close to the connecting sleeve (1) is configured as a diverter cone with a cone angle of 60°.

3. A damping double-layer co-extrusion molding die head according to claim 1, characterized in that: The front end of the inner layer splitter cone (6) is a splitter cone with a cone angle of 90°.

4. The damping double-layer co-extrusion molding die head according to claim 1, characterized in that: The outer damping sleeve (11) is provided with a first temperature measuring hole (19) and a second temperature measuring hole (23) in the middle thereof.

5. The damping double-layer co-extrusion molding die head according to claim 1, characterized in that: The machine head body (4) and the inner diverter cone (6) are connected by interference fit and full welding.

6. The damping double-layer co-extrusion molding die head according to claim 1, characterized in that: The head body (4), the inner splitter cone (6), the inner damping body (7) and the core mold (12) are provided with ventilation holes (5) which are interconnected.

7. The damping double-layer co-extrusion molding die head according to claim 1, characterized in that: The machine head body (4) is provided with a second adjusting screw (27), the second adjusting screw (27) being in contact with the intermediate damping body (8), and the outer damping sleeve (11) is provided with a first adjusting screw (26), the first adjusting screw (26) being in contact with the die (15).

8. The damping double-layer co-extrusion molding die head according to claim 1, characterized in that: The molding machine head is also provided with a flow distribution section heater (2) and a damping section heater (10).

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