Die head structure and extrusion equipment

Abstract

The invention provides a die head structure and extrusion equipment. The die head structure comprises a flange, a spreader, a die core, a mouth die and a gland, the outer wall of the gland is sleeved with a first heating ring. A second heating ring is sleeved on the outer wall of the mouth mold exposed outside the gland; a cavity is formed in the mold core, and an electric heating tube is arranged in the cavity; through an internal and external heat supply mode, a plastic melt in the internal runner can obtain more balanced heat, and adverse effects caused by temperature difference are reduced, so that the production efficiency and the product quality are improved; wherein a power connection assembly is arranged in the spreader, and the electric heating tube is electrically connected with the outside through the power connection assembly; the whole die head structure can serve as an independent structure module, an extrusion equipment body does not need to be manufactured, and actual machining production and application are facilitated.

Description

Technical Field

[0001] This invention relates to the field of extrusion equipment, and more specifically, to a die structure and an extrusion device. Background Technology

[0002] Extrusion equipment is a commonly used processing equipment in plastics processing and production. As the core component of extrusion equipment, the die head structure functions to shape the molten plastic, which has been plasticized and homogenized by the extrusion equipment, into the required cross-sectional shape through a specific flow channel.

[0003] However, in existing technologies, the heating and heat preservation of the plastic melt inside the die head structure generally relies on wrapping a heating coil or setting a heating plate around the outside of the die head. Heat must be transferred from the outer wall of the die head through metal heat conduction to the plastic melt in the internal flow channel. This path is long and has high thermal resistance, resulting in a long preheating time and slow system response when adjusting the process temperature, which is not conducive to improving production efficiency and flexibility. Furthermore, the external temperature may be high while the internal temperature is low, causing differences in the flowability and viscosity of the melt between the center and the edge of the flow channel, which in turn affects the uniformity of the output and can easily cause problems such as flow marks, uneven thickness, or increased internal stress in the product. Therefore, improvements are needed. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the technical problem to be solved by the present invention is to propose a die head structure and extrusion equipment, wherein the die head structure has an electric heating tube inside the die core, which can provide more even heat to the plastic melt in the internal flow channel through internal and external heating, reduce the adverse effects of temperature difference, and thus improve production efficiency and product quality.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] This invention provides a die head structure, including a flange, a flow divider, a die core, a die opening, and a pressure cap; the flow divider is bolted to the flange, the die core is installed in the middle of the flow divider, and the die opening is fitted on the outside of the die core to form a flow channel; the pressure cap is fitted on the outside of the die opening and is fixedly mounted to the flange by bolts to clamp and fix the die opening; a first heating ring is fitted on the outer wall of the pressure cap; a second heating ring is fitted on the outer wall of the die opening exposed outside the pressure cap; the die core has a cavity inside, and an electric heating tube is installed in the cavity; an electrical connection component is installed in the flow divider, and the electric heating tube is connected to the outside through the electrical connection component.

[0007] In a preferred embodiment of the present invention, the diversion shuttle includes a cylindrical support block, a first recessed groove in the middle of the support block, the groove wall of the first recessed groove being threaded, and one end of the mold core being threadedly connected and installed in the first recessed groove; a second recessed groove is provided on the bottom surface of the first recessed groove, the diameter of the second recessed groove being smaller than the diameter of the first recessed groove; a plurality of diversion holes penetrating the two walls of the support block are provided on the outer side of the first recessed groove, the plurality of diversion holes being distributed in an array around the central circumference of the first recessed groove; a first hole penetrating the outer wall of the support block is provided on the side wall of the first recessed groove, the first hole being offset from the diversion holes; an electrical connection assembly is installed in the first recessed groove and the first hole, and the electrical connection head of the heating element is installed and connected to the electrical connection assembly.

[0008] In a preferred embodiment of the present invention, the power connection assembly includes a first mounting bracket, a second mounting bracket, and a power connection bolt; the first mounting bracket is installed at the second recess by bolts, the second mounting bracket is installed inside the first mounting bracket and is electrically insulated, and the power connection head of the heating element is installed on the second mounting bracket; the power connection bolt is installed at the first hole, and the end of the power connection bolt is connected to the electrode of the heating element for conduction; the first mounting bracket, the second mounting bracket, and the power connection bolt are all electrically insulated from the support block.

[0009] In a preferred embodiment of the present invention, both the first and second card holders are ceramic structures; the power connection bolt includes a power connection rod, the outside of which is fixedly covered by a support sleeve, and both ends of the power connection rod protrude from the ends of the support sleeve; the support sleeve is a ceramic structure, and the external shape of the support sleeve is adapted to the shape of the first hole, the power connection bolt is installed at the first hole through the support sleeve, and the power connection rod extends into the second card holder and is electrically connected to the power connection electrode.

[0010] In a preferred embodiment of the present invention, a third recessed groove is provided on the wall surface of the first card holder near the heating tube, and a first through hole is provided on the side wall of the third recessed groove corresponding to the first hole; the shape of the second card holder is adapted to the shape of the third recessed groove, and a fourth recessed groove is provided on the wall surface of the second card holder away from the heating tube, and a second through hole is provided on the side wall of the fourth recessed groove corresponding to the first through hole; the second card holder is fixedly installed in the third recessed groove by bolts; a third through hole is provided through the bottom of the fourth recessed groove, and a third threaded hole is provided at the end of the heating tube, and the heating tube is fixedly connected to the second card holder by screws; a fourth through hole is provided through the bottom of the fourth recessed groove, and the shape of the fourth through hole is adapted to the shape of the electrode and the position is corresponding, and the electrode extends into the fourth recessed groove through the fourth through hole and is located on one side of the second through hole; the end of the connecting bolt extends into the fourth recessed groove through the first through hole and the second through hole, and the end of the connecting rod is electrically connected to the electrode.

[0011] In a preferred embodiment of the present invention, the number of first holes is two, and they are symmetrically arranged on opposite sides of the support block; the first hole includes a first hole segment and a second hole segment that are interconnected, the first hole segment is located on the outer side of the second hole segment, the diameter of the first hole segment is larger than the diameter of the second hole segment, and the inner wall of the first hole segment is threaded; the diameter of the second hole segment is adapted to the diameter of the first through hole; the support sleeve includes a prismatic portion, a threaded portion, and a smooth rod portion connected in sequence, the diameter of the threaded portion is adapted to the diameter of the first hole segment and the thread pattern is adapted, the diameter of the smooth rod portion is adapted to the diameter of the second hole segment and the first through hole; the diameter of the second through hole is adapted to the diameter of the protruding section of the connecting rod away from the prismatic portion.

[0012] In a preferred embodiment of the present invention, a conductive spring is fixedly provided on the end face of the electric pole away from the prismatic part, and the conductive spring has an outwardly convex arc shape structure.

[0013] In a preferred embodiment of the present invention, the cavity wall is provided with a plurality of grooves, one end of which is normally open near the electrical connection component, and the plurality of grooves are arranged in a circumferential array around the axis.

[0014] The present invention also provides an extrusion apparatus, including the aforementioned die structure.

[0015] The beneficial effects of this invention are as follows:

[0016] This invention provides a die head structure and extrusion equipment. The die head structure includes a flange, a flow divider, a die core, a die, and a pressure cap. A first heating ring is fitted on the outer wall of the pressure cap. A second heating ring is fitted on the outer wall of the die exposed outside the pressure cap. The die core has a cavity inside, and an electric heating tube is installed in the cavity. By using internal and external heating, the plastic melt in the internal flow channel can receive more even heat, reducing the adverse effects of temperature differences, thereby improving production efficiency and product quality.

[0017] The diverter shuttle is equipped with an electrical connection component, through which the heating element is connected to the outside for power. This allows the entire die head structure to function as an independent structural module, eliminating the need to modify the extrusion equipment itself and facilitating practical processing, production, and application. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a basic mold head provided in a specific embodiment of the present invention;

[0019] Figure 2 This is a cross-sectional view of a basic mold head provided in a specific embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the three-dimensional unfolded structure of a basic mold head provided in a specific embodiment of the present invention;

[0021] Figure 4This is a three-dimensional structural schematic diagram of the diversion shuttle provided in a specific embodiment of the present invention;

[0022] Figure 5 This is a cross-sectional view of the diversion shuttle provided in a specific embodiment of the present invention;

[0023] Figure 6 This is a three-dimensional structural diagram of the power connection component provided in a specific embodiment of the present invention;

[0024] Figure 7 This is a cross-sectional view of the power connection assembly provided in a specific embodiment of the present invention;

[0025] Figure 8 This is a first-view three-dimensional unfolded structural diagram of the power connection component provided in a specific embodiment of the present invention;

[0026] Figure 9 This is a second-view three-dimensional unfolded structural diagram of the power connection component provided in a specific embodiment of the present invention;

[0027] Figure 10 This is a three-dimensional structural diagram of the mold core provided in a specific embodiment of the present invention.

[0028] In the picture:

[0029] 100. Flange; 200. Diverter shuttle; 210. Support block; 220. First recess; 230. Second recess; 240. Diverter hole; 250. First hole position; 251. First hole section; 252. Second hole section; 300. Mold core; 310. Cavity; 320. Groove; 400. Die; 500. Cover; 610. First heating coil; 620. Second heating coil; 700. Heating element; 710. Connector; 7 20. Electrode; 800. Electrical connection assembly; 810. First retainer; 811. Third recess; 812. First through hole; 820. Second retainer; 821. Fourth recess; 822. Second through hole; 823. Third through hole; 824. Fourth through hole; 830. Electrical connection bolt; 831. Electrical connection rod; 832. Support sleeve; 8321. Prismatic part; 8322. Threaded part; 8323. Smooth rod part; 833. Conductive spring. Detailed Implementation

[0030] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0031] like Figures 1 to 3As shown, a specific embodiment of the present invention discloses a die head structure, including a flange 100, a flow divider 200, a die core 300, a die 400, and a pressure cap 500; the flow divider is bolted to the flange, the die core is installed in the middle of the flow divider, and the die 400 is sleeved on the outside of the die core to form a flow channel; the pressure cap is sleeved on the outside of the die 400 and fixedly installed on the flange by bolts to clamp and fix the die 400; a first heating ring 610 is sleeved on the outer wall of the pressure cap 500; a second heating ring 620 is sleeved on the outer wall of the die 400 exposed on the outside of the pressure cap; the die core 300 has a cavity 310 inside, an electric heating tube 700 is provided in the cavity 310, and an electric connection component 800 is provided in the flow divider 200, the electric heating tube is connected to the outside through the electric connection component;

[0032] The aforementioned mold head structure can provide more even heat to the plastic melt in the internal flow channel through internal and external heating, reducing the adverse effects of temperature differences and thus improving production efficiency and product quality.

[0033] The diverter shuttle is equipped with an electrical connection component, and the heating element is connected to the outside through the electrical connection component; this allows the entire die head structure to be used as an independent structural module, without the need to modify the extrusion equipment body, which facilitates actual processing, production and application.

[0034] It should be noted that the first heating coil and the second heating coil are existing heating devices that can be purchased and used on the market. Their specific structure and usage will not be described in detail.

[0035] Furthermore, such as Figure 4 As shown, the diversion shuttle 200 includes a cylindrical support block 210. A first recess 220 is provided in the middle of the support block 210, and the wall of the first recess is threaded. One end of the mold core 300 is threadedly connected and installed in the first recess 220. A second recess 230 is provided on the bottom surface of the first recess 220, and the diameter of the second recess 230 is smaller than the diameter of the first recess 220, providing space for the installation of the electrical connection components and the mold core. Multiple diversion holes 240 penetrating the two walls of the support block 210 are provided on the outer side of the first recess 220, and the multiple diversion holes... The first settling tank has a central circumferential array to ensure that the plastic melt inside the extrusion equipment can pass smoothly. The side wall of the first settling tank 220 is provided with a first hole 250 that penetrates the outer wall of the support block. The first hole is staggered from the diversion hole. The power connection component is installed in the first settling tank and the first hole, and the power connector of the heating tube is installed and connected to the power connection component. The first hole is set in the space between two adjacent diversion holes, which does not affect the normal flow channel layout and allows the first hole to pass smoothly to the outside, thereby providing space for the power connection component to be connected to external power.

[0036] Furthermore, such as Figure 2 , Figures 6 to 9As shown, the power connection assembly 800 includes a first retaining seat 810, a second retaining seat 820, and a power connection bolt 830. The first retaining seat 810 is bolted to the second recess 230. The second retaining seat 820 is installed inside the first retaining seat 810 and is electrically insulated. The power connector 710 of the heating element 700 is installed on the second retaining seat 820. The power connection bolt 830 is installed at the first hole 250, and the end of the power connection bolt 830 is connected to the electrode 720 of the heating element 700 for conduction. The first retaining seat 810, the second retaining seat 820, and the power connection bolt 830 are all electrically insulated from the support block 210. The whole assembly is a modular structure, which facilitates the processing and production of each structural component and makes disassembly and replacement convenient. The connection parts corresponding to the first retaining seat, the second retaining seat, the power connection bolt, and the support block are all electrically insulated connections. This connection mainly serves to connect and fix the components, providing insulation support for necessary power connection, preventing short circuits caused by contact between the power connection components and the support block, and maintaining a stable working state.

[0037] Furthermore, both the first mounting bracket 810 and the second mounting bracket 820 are ceramic structures, which can provide sufficient structural strength to support the installation of the heating element and ensure the required insulation effect. The connecting bolt 830 includes a connecting rod 831, the outside of which is fixedly covered by a support sleeve 832, with both ends of the connecting rod protruding from the end of the support sleeve. The support sleeve 832 is a ceramic structure, and its external shape is adapted to the shape of the first hole 250. The connecting bolt is installed at the first hole through the support sleeve, and the connecting rod extends into the second mounting bracket and makes conductive contact with the connecting electrode. The support sleeve, as the part that directly contacts the support block, is a ceramic structure that ensures an insulated connection, while the internally inserted connecting rod provides a conductive part, allowing the heating element to be connected to the outside and maintain a stable and safe power supply.

[0038] Furthermore, the first mounting bracket 810 has a third recessed groove 811 on its wall near the heating element, and a first through hole 812 on the side wall of the third recessed groove 811 corresponding to the first hole; the shape of the second mounting bracket 820 is adapted to the shape of the third recessed groove 811, and a fourth recessed groove 821 is provided on the wall of the second mounting bracket 820 away from the heating element, and a second through hole 822 on the side wall of the fourth recessed groove 821 corresponding to the first through hole; the second mounting bracket 820 is fixedly installed in the third recessed groove 811 by bolts; a third through hole 823 is provided through the bottom of the fourth recessed groove 821, and a third threaded hole is provided at the end of the heating element, and the heating element is fixedly connected to the second mounting bracket by screws;

[0039] The bottom of the fourth settling tank 821 is provided with a fourth through hole 824. The shape of the fourth through hole 824 is adapted to the shape of the electrode 720 and the position is corresponding. The electrode 720 extends into the fourth settling tank 821 through the fourth through hole 824 and is correspondingly located on one side of the second through hole 822. The end of the electric bolt extends into the fourth settling tank through the first through hole and the second through hole, and the end of the electric rod is electrically connected to the electrode.

[0040] The second sink has a second threaded hole at the bottom, and the third sink has a fifth through hole at the bottom. The first bracket is installed in the second sink by the first bolt. The second bracket has a sixth through hole corresponding to the fifth through hole. The second bracket is located in the third sink and is fixed with the first bolt. This reduces the number of holes, maintains the structural strength of the ceramic first and second brackets, and prevents them from being easily damaged. It also makes the overall structure more compact and convenient for installation and disassembly.

[0041] Furthermore, the number of first holes is two, and they are symmetrically arranged on opposite sides of the support block; the first hole 250 includes a first hole segment 251 and a second hole segment 252 that are interconnected, the first hole segment is located on the outer side of the second hole segment, the diameter of the first hole segment is larger than the diameter of the second hole segment, and the inner wall of the first hole segment is threaded; the diameter of the second hole segment is adapted to the diameter of the first through hole; the support sleeve 832 includes a prismatic portion 8321, a threaded portion 8322, and a smooth rod portion 8323 connected in sequence, the diameter of the threaded portion 8322 is adapted to the diameter of the first hole segment 251 and the thread pattern is adapted, the diameter of the smooth rod portion 8323 is adapted to the diameter of the second hole segment 251 and the diameter of the second through hole 252. The diameters of the hole segment 252 and the first through hole 812 are compatible; the diameter of the second through hole is compatible with the diameter of the protruding section of the connecting rod away from the prismatic part; the prismatic part can be used as a holding part for tightening the connecting bolt, and the threaded part is threadedly connected to the first hole segment to achieve a stable installation; the smooth rod part can pass through the second hole segment and extend into the first through hole; with this structure, the smooth rod part of the installed connecting bolt can extend into the first through hole, and the connecting rod can extend into the second through hole, thereby using the connecting bolt to achieve a secondary locking of the first and second locking seats, providing a stable installation fit, and also allowing the connecting bolt and the connecting electrode to maintain a conductive connection fit.

[0042] Furthermore, such as Figure 9 As shown, a conductive spring 833 is fixedly provided on the end face of the electrode rod 831 away from the prismatic part. The conductive spring has an outwardly convex arc shape structure; it can serve as an extension part and provide a basis for elastic deformation to achieve effective contact and ensure effective conductivity. It also prevents excessive pushing of the electrode and prevents the electrode from being deformed or damaged.

[0043] Furthermore, such as Figure 10As shown, the cavity wall of cavity 310 is provided with multiple grooves 320. The end of the groove near the electrical component is normally open, and the multiple grooves are distributed in a circumferential array around the axis; this can provide a larger heating area, facilitate the diffusion and transfer of heat from the internal heating element, enable rapid response, and improve efficiency.

[0044] The present invention also provides an extrusion apparatus, including the aforementioned die structure.

[0045] This invention has been described through preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. This invention is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims are also within the protection scope of this invention.

Claims

1. A die head structure, comprising a flange, a flow divider, a die core, an orifice, and a pressure cap; the flow divider is bolted to the flange, the die core is installed in the middle of the flow divider, and the orifice is fitted around the outside of the die core to form a flow channel; the pressure cap is fitted around the outside of the orifice and fixedly mounted to the flange by bolts, clamping and fixing the orifice; characterized in that: The outer wall of the pressure cap is fitted with a first heating coil; A second heating coil is fitted on the outer wall of the die protruding from the outside of the gland; The mold core has an internal cavity, and an electric heating tube is installed inside the cavity. The distribution shuttle has an electrical connection component, and the electric heating tube is connected to the outside through the electrical connection component.

2. The mold head structure according to claim 1, characterized in that: The diverter includes a cylindrical support block, a first recess in the middle of the support block, and threads on the wall of the first recess. One end of the mold core is threaded and installed in the first recess. The bottom surface of the first settling tank is provided with a second settling tank, the diameter of the second settling tank being smaller than the diameter of the first settling tank; the outer side of the first settling tank is provided with multiple diversion holes penetrating the two walls of the support block, the multiple diversion holes being distributed in an array around the center circumference of the first settling tank; the side wall of the first settling tank is provided with a first hole penetrating the outer wall of the support block, the first hole being staggered from the diversion holes. The power connection assembly is installed at the first sink and the first hole, and the power connector of the heating element is installed and connected to the power connection assembly.

3. The mold head structure according to claim 2, characterized in that: The power connection assembly includes a first mounting bracket, a second mounting bracket, and a power connection bolt; The first bracket is bolted to the second sink, the second bracket is installed inside the first bracket and is electrically insulated, and the connector of the heating element is installed on the second bracket; the connecting bolt is installed at the first hole, and the end of the connecting bolt is connected to the electrode of the heating element for conduction. The first and second card holders and the electrical connection bolts are all electrically insulated from the support block.

4. The die head structure according to claim 3, characterized in that: Both the first and second card slots are made of ceramic. The connection bolt includes a connection rod, the outside of which is fixedly covered by a support sleeve, and both ends of the connection rod protrude from the ends of the support sleeve; The support sleeve is made of ceramic and its external shape is adapted to the shape of the first hole. The electrical bolt is installed at the first hole through the support sleeve, and the electrical rod extends into the second card holder and is electrically connected to the electrode.

5. A mold head structure according to claim 4, characterized in that: The first card holder has a third recessed groove on its wall near the heating element, and the side wall of the third recessed groove has a first through hole corresponding to the first hole. The shape of the second card holder is adapted to the shape of the third recess. A fourth recess is provided on the wall of the second card holder away from the heating tube. A second through hole is provided on the side wall of the fourth recess corresponding to the first through hole. The second card holder is fixedly installed in the third recess by bolts. The bottom of the fourth settling tank is provided with a third through hole, and the end of the heating tube is provided with a corresponding third threaded hole. The heating tube is fixedly connected to the second bracket by screws. The bottom of the fourth settling tank is provided with a fourth through hole. The shape of the fourth through hole is adapted to the shape of the electrode and the position corresponds to it. The electrode extends into the fourth settling tank through the fourth through hole and is located on one side of the second through hole. The end of the electrical connection bolt extends into the fourth recess through the first and second through holes, and the end of the electrical connection rod is electrically connected to the electrical connection electrode.

6. The die head structure according to claim 5, characterized in that: The number of first holes is 2, and they are symmetrically arranged on opposite sides of the support block; The first hole includes a first hole segment and a second hole segment that are interconnected. The first hole segment is located on the outer side of the second hole segment. The diameter of the first hole segment is larger than the diameter of the second hole segment. The inner wall of the first hole segment is threaded. The diameter of the second hole section is matched with the diameter of the first perforation; The support sleeve includes a prismatic part, a threaded part, and a smooth rod part connected in sequence. The diameter of the threaded part is adapted to the diameter of the first hole section and the thread pattern is adapted to the first hole section. The diameter of the smooth rod part is adapted to the diameter of the second hole section and the first through hole. The diameter of the second perforation is matched with the diameter of the protruding section of the pole away from the prism.

7. A die head structure according to claim 6, characterized in that: A conductive spring is fixedly installed on the end face of the pole away from the prism, and the conductive spring has an outwardly convex arc shape.

8. The mold head structure according to claim 1, characterized in that: The cavity wall is provided with multiple grooves, one end of which is normally open near the electrical component, and the multiple grooves are arranged in a circular array around the axis.

9. An extrusion apparatus, characterized in that: Includes the mold head structure as described in any one of claims 1-8.

Images