A rapid cooling and heating injection mold for automobile accessories

Abstract

The present invention provides a rapid cooling and heating injection mold for automobile accessories, which relates to the field of injection molds, including a base with an overall flat rectangular structure, wherein the sides of the base are respectively provided with mutually parallel and horizontal guide rods near the four corners, and the outer walls of the four guide rods are slidably sleeved with the same male mold head and the same female mold base, wherein the male mold head is a rectangular box-shaped structure with an opening toward the base, and a cavity recessed inwardly is reserved at the bottom of the side of the male mold head away from the base. When the inner wall of the cavity needs to be heated before injection molding, the present invention only needs to quickly pass high-temperature steam into the steam heating pipe. Since the steam comes and goes very quickly, the heating speed of the cavity is greatly improved. When the injection molding is completed and cooling is required, the high-temperature steam in the steam heating pipe is extracted, and the heat is dissipated by blowing air at the same time. On one side of the female mold base, the fitted heat-conducting contact head only needs to be removed first, and air cooling can be performed after leaving a gap.

Description

Technical Field

[0001] The invention relates to the field of injection molds, and in particular to a rapid cooling and heating injection mold for automobile accessories. Background Art

[0002] The rapid cooling and heating molding technology is also known as high-gloss seamless injection molding. It is a molding process in which the mold temperature can be changed during the molding process by heating the mold with rapid cooling and heating equipment before injection molding, so that the mold temperature is quickly raised to above the melting temperature of the plastic, and then the mold temperature is quickly lowered to the ejection temperature after the injection molding is completed. Most of the rapid cooling in the prior art uses water cooling to accelerate cooling. This method has the problem of too fast cooling speed, which can easily cause cracks on the surface of the finished product. In this case, it is usually necessary to observe and control the water temperature from time to time; although this method of controlling the water temperature to adjust the temperature of the mold is relatively accurate and easy to control, the speed is too slow, and uneven cooling is prone to occur in the places where the cold water cannot reach.

[0003] For example: Chinese invention patent application CN115157570A discloses a high-efficiency and energy-saving rapid cooling and heating mold, in which a row of air paths across the front mold core is provided in the front mold core, and an air inlet pipe and an air outlet pipe respectively connected to the two ends of each air path are embedded in the front mold plate, the air inlet pipe is connected to the liquid outlet end of the external mold temperature controller, and the air outlet pipe is connected to the liquid return end of the external mold temperature controller. The side walls and bottom wall around the front mold core are provided with heat insulation plates, and the outer walls of the air inlet pipe and the air outlet pipe are provided with heat insulation sleeves. Beneficial effects of the present invention: The mold structure greatly reduces the heat exchange between the front mold core and the front mold plate, and also greatly reduces the heat exchange between the air inlet pipe and the air outlet pipe and the front mold plate; the above patent can prove the defects of the prior art.

[0004] Therefore, we made improvements on this and proposed a rapid cooling and heating injection mold for automotive accessories. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the current method of controlling the temperature drop and temperature rise of a mold by controlling the water temperature is not only slow but also prone to uneven cooling.

[0006] In order to achieve the above-mentioned purpose of the invention, the present invention provides a rapid cooling and heating injection mold for automobile accessories to improve the above-mentioned problems.

[0007] The present invention is specifically as follows:

[0008] It comprises a base with an overall flat rectangular structure, wherein parallel and horizontal guide rods are respectively arranged on the side surfaces of the base near the four corners, the outer walls of the four guide rods are slidably sleeved with the same male mold head and the same female mold base, the male mold head is a rectangular box-shaped structure with an opening facing the base, and a cavity recessed inwardly is reserved at the bottom of one side of the male mold head away from the base, a steam heating pipe coiled around the convex surface of the cavity is fixed to the inner wall of the male mold head, and an air inlet pipe 2 and a cold air pipe 1 with nozzles facing the surface of one side of the convex surface of the cavity are respectively connected to the upper and lower surfaces of the male mold head; the female mold base is a rectangular box-shaped structure with an opening opposite to the opening of the male mold head, and a cavity matching the cavity is reserved in the middle of the box bottom of the female mold base The core convex head, the bottom of the box of the female mold base is fixed with a groove-shaped guard rail with an opening facing the middle and parallel to each other near the periphery of the core convex head, the extension direction of the groove-shaped guard rail is perpendicular to the plane where the bottom of the box of the female mold base is located, and multiple convex sliders are slidably connected in the groove-shaped guard rails, and buffer springs are fixed between multiple convex sliders and the bottom inner wall of the female mold base; the same heat-conducting contact head that matches the concave surface of the core convex head is fixed between the multiple convex sliders; the side of the female mold base is connected with a mold base air inlet pipe at the edge of the concave surface of the core convex head, when the heat-conducting contact head is pulled out for a distance, a gap will be formed between its outer wall and the concave surface of the core convex head, and the air outlet of the mold base air inlet pipe is inclined toward the entrance of the gap.

[0009] As a preferred technical solution of the present invention, an injection port with an expanded outward-facing conical structure is opened in the middle of one side of the base away from the male mold head, the injection port is connected to the glue outlet of the injection molding machine, and a pouring nozzle is fixed in the nozzle at one end of the injection port close to the male mold head, and a constant temperature device is provided on the outer wall of the pouring nozzle; an injection nozzle matching the pouring nozzle is reserved in the middle of the bottom of the cavity; during injection molding, the constant temperature device is turned on first, and the glue outlet of the injection molding machine is inserted into the injection port and closed and fixed, and after the mold is closed and preheated, the outlet end of the pouring nozzle is tightly fitted with the inlet of the injection nozzle, and injection molding can be performed at this time to quickly inject the molten plastic into the cavity formed by the cavity and the core convex head, and the finished decorative part is formed after cooling.

[0010] As a preferred technical solution of the present invention, the circumferential inner wall of the injection nozzle is a truncated cone structure, and the aperture of the injection nozzle close to the base is larger than the aperture of the cavity.

[0011] As a preferred technical solution of the present invention, the base is fixed with pads at the four corners of one side of the male mold head, and the guide rods are respectively fixed on the surfaces of the corresponding pads; a compression spring is fixed on the surface of each pad, and the compression spring is sleeved on the outer wall of the corresponding guide rod, and a guide block is fixed on the end of the compression spring close to the male mold head, and the four guide blocks are respectively fixed on the inner wall of the male mold head close to the four corners; an axis socket is opened on the side of each guide block close to the base, and a wear-resistant slide tube is welded and fixed in the axis socket; the wear-resistant slide tube runs through the left and right sides of the male mold head; the guide rod is slidably inserted in the corresponding wear-resistant slide tube; after the injection molding is completed, the extrusion force on the female mold seat will be slowly removed along the axial direction of the guide rod, and at this time, under the action of the four compression springs, the base will be separated from the male mold head first, that is, the contact between the casting nozzle and the injection nozzle will be separated, which is conducive to the rapid cooling of the residue inside the injection nozzle and convenient for the breaking operation during the later demolding; and the male mold head and the female mold seat can be pushed away together to form a sequential demolding.

[0012] As a preferred technical solution of the present invention, rectangular slots are reserved near the four corners on one side of the female mold base close to the male mold head, and the bottom of the rectangular slots are provided with jacks coaxial with the guide rod; hooks are fixed near the middle of the upper surfaces of the female mold base and the base; during installation, the female mold base, the male mold head and the base can be combined into one, and then hoisted, which is conducive to accurately and quickly fixing the device on the injection molding machine.

[0013] As a preferred technical solution of the present invention, the front and rear sides of the male mold head are respectively provided with heat dissipation hole 1 and heat dissipation hole 2, and the lower surface of the male mold head is plugged with an identification plate to mark the inlet and outlet of the steam heating tube; the steam heating tube also includes a spiral tube spirally wound on the convex surface of the cavity, and the convex surface of the cavity is provided with a spiral groove matching the shape of the spiral tube; a cover plate 1 is fixed at the opening of the male mold head, and a circular hole 2 matching the diameter of the injection tube mouth is provided in the middle of the cover plate 1; two symmetrical wind gathering blocks are fixed between the cover plate 1 and the bottom of the box of the male mold head, and the two wind gathering blocks are The blocks are respectively located on the front and rear sides of the male mold head, and two symmetrical wind guide guard plates are fixed between the two wind gathering blocks, and the wind guide guard plates are provided with air inlets, and the two air inlets are respectively connected with the pipe openings of the cold air pipe one and the air inlet pipe two; the pipe openings of the cold air pipe one, the air inlet pipe two and the mold base air inlet pipe are all arranged in a flat-mouth expansion structure, which can apply the airflow to the target surface in a large range; it plays a role in assisting uniform heat dissipation, and can also blow cold air evenly on the surface of the spiral tube; the convex surface of the cavity is located at the gap of the spiral tube and is provided with rectangular grooves; it is used to accelerate the heat dissipation of the cavity.

[0014] As a preferred technical solution of the present invention, two symmetrical L-shaped fixing frames are fixed at the bottom of the box of the female mold base, and electromagnets are fixed at the ends of the two L-shaped fixing frames close to the heat-conducting contact head; two grooves are opened at the end of the heat-conducting contact head away from the core protrusion, and permanent magnets matching the position of the electromagnets are fixed in the two grooves. When the electromagnet is energized, a repulsive force will be generated at the end of the permanent magnet close to the electromagnet, which will push the heat-conducting contact head to be inserted into the concave surface of the core protrusion, forming a seamless contact, and then quickly transferring heat to it.

[0015] As a preferred technical solution of the present invention, a pressure-bearing thick plate is fixed at the opening of the female mold base, and two centrally symmetrical strip holes are opened on the pressure-bearing thick plate to dissipate heat.

[0016] As a preferred technical solution of the present invention, the ejector mechanism includes two circular holes 1 opened on the cover plate 1 and symmetrically distributed about the circular hole 2; the bottom of the cavity is provided with two stepped grooves corresponding to the circular hole 1, and the bottom of the stepped groove is provided with an ejection hole, in which a sliding bearing is embedded; an ejector rod is slidably connected to the sliding bearing, and a round cover pressure head is fixed to one end of the ejector rod close to the base, the diameter of the round cover pressure head is smaller than the aperture of the circular hole 1, and a reset spring is fixed between the round cover pressure head and the sliding bearing; by providing the round cover pressure head and the ejector rod, when it is necessary to withdraw the material, it is only necessary to press the two round cover pressure heads inward at the same time from one side of the base.

[0017] As a preferred technical solution of the present invention, two bearing frames distributed in a centrally symmetrical manner are fixed to the surface of the cover plate one, and anti-slip bearings are clamped in the two bearing frames, and long shaft rods are rotatably connected to the anti-slip bearings, and synchronous pulleys in a centrally symmetrical manner are fixed to the ends of the two long shaft rods, and trapezoidal thrust blocks in a centrally symmetrical manner are fixed to the sides of the two synchronous pulleys close to the cover plate one; the same toothed belt is wound between the circumferential outer walls of the two synchronous pulleys; a fixed block is fixed to the side of the toothed belt, a push rod fixing seat is fixed to the side of the surface of the cover plate one close to the fixed block, and an electric push rod is fixed in the middle of the push rod fixing seat, and the end of the electric push rod extension rod is fixed to the surface of the fixed block.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In order to solve the problem of slow heating and cooling speed caused by water cooling in the prior art, the present invention sets a steam heating pipe coiled around the cavity to cooperate with the cold air pipe 1 and the air inlet pipe 2 on both sides thereof. When the inner wall of the cavity needs to be heated before injection molding, it is only necessary to quickly introduce high-temperature steam into the steam heating pipe. Since the steam comes and goes very quickly, the heating speed of the cavity is greatly improved. When the core convex head on the other side needs to be heated, it is only necessary to push the high-temperature heat-conducting contact head toward the concave bottom of the core convex head and fit it thereto to quickly heat each position, so as to achieve a uniform heating effect. When the injection molding is completed and cooling is required, the high-temperature steam in the steam heating pipe is extracted, and the heat is dissipated by blowing air at the same time. On one side of the mother mold seat, it is only necessary to remove the fitted heat-conducting contact head first, leave a gap, and then cool by air.

[0020] 2. In order to solve the problem that the residue of the pouring nozzle in the prior art needs to be removed separately later, the present invention provides an injection nozzle with a truncated cone-shaped inner wall, so that after the finished decorative part is cooled and formed, the ejector mechanism is used to demould the cooled finished decorative part. At the same time, the hard plastic residue in the injection nozzle can be broken off. Since the structure here is similar to a cone, the elastic thrust generated when breaking off can bounce the residue in the injection nozzle in the opposite direction, that is, collapse to one side of the base, avoiding the need to remove the residue of the injection nozzle later, thereby improving production efficiency;

[0021] 3. By setting up an electric push rod and two trapezoidal push blocks that are symmetrically distributed in the center, when it is necessary to press the two round cover pressure heads at the same time, it is only necessary to control the extension rod of the electric push rod to extend. At this time, the protruding parts of the two trapezoidal push blocks can squeeze the two round cover pressure heads to move axially, and then eject the finished decorative parts, solving the problem of easy blockage when using gas to eject the finished decorative parts in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the overall structure provided by the present invention;

[0023] Figure 2 A top view provided for the present invention;

[0024] Figure 3 For the present invention Figure 2 Schematic diagram of the cross-sectional structure along line AA;

[0025] Figure 4 A schematic diagram of the three-dimensional structure of the heat-conducting contact head provided by the present invention;

[0026] Figure 5 It is a schematic structural diagram of the first stage of the demoulding of the present invention;

[0027] Figure 6It is a schematic diagram of the structure of the present invention after demoulding is completed;

[0028] Figure 7 It is a side view of the present invention after demoulding is completed;

[0029] Figure 8 For the present invention Figure 7 The schematic diagram of the cross-sectional structure along the BB line;

[0030] Fig. 9 It is a schematic diagram of the assembly structure of the base and the cover plate 1 in the present invention;

[0031] Fig.10 It is a schematic diagram of the assembly structure of the other side of the base and the cover plate in the present invention;

[0032] Fig.11 It is a side view of the male die head of the present invention without the cover plate 1;

[0033] Fig.12 For the present invention Fig.11 Schematic diagram of the cross-sectional structure along the CC line;

[0034] Fig.13 It is a schematic diagram of the exploded structure of the internal structure of the male die head in the present invention.

[0035] Indicated in the figure:

[0036] 1. Base; 2. Cushion block; 3. Compression spring 1;

[0037] 4. Male die head; 401. Heat dissipation hole 1; 402. Cavity; 403. Injection nozzle; 404. Heat dissipation hole 2; 405. Step sink; 406. Guide block; 407. Rectangular groove; 408. Spiral groove;

[0038] 5. Guide rod;

[0039] 6. Female mold base; 601. Rectangular slot; 602. Core convex head;

[0040] 7. Steam heating tube; 701. Spiral tube;

[0041] 8. Air conditioning pipe 1;

[0042] 9, cover plate 1; 901, round hole 1; 902, round hole 2;

[0043] 10. Electric push rod; 11. Bearing frame; 12. Injection port;

[0044] 13. Synchronous pulley; 1301. Trapezoidal push-in block;

[0045] 14. Casting nozzle; 15. Toothed conveyor belt; 16. Air inlet pipe of mold base; 17. Air inlet pipe II; 18. Push rod fixing seat; 19. Grooved guard rail; 20. Pressure-bearing thick plate; 21. Strip hole; 22. Permanent magnet; 23. Electromagnet; 24. Convex slider; 25. Heat-conducting contact head; 26. Air guide guard plate; 27. Buffer spring; 28. Hook;

[0046] 29, round cover pressure head; 2901, ejector rod; 2902, return spring; 2903, sliding bearing;

[0047] 30. Finished decorative parts; 31. Wear-resistant sliding pipe; 32. Wind-gathering block. DETAILED DESCRIPTION

[0048] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0049] As described in the background art, controlling the temperature drop and temperature rise of the mold by controlling the water temperature is not only slow but also prone to uneven cooling.

[0050] In order to solve this technical problem, the present invention provides a rapid cooling and heating injection mold for automobile accessories, which is used for injection molding of automobile accessories.

[0051] Specifically, please refer to Figure 1-Figure 13 , a rapid cooling and heating injection mold for automobile accessories specifically includes:

[0052] The base 1 is a flat rectangular structure as a whole, and parallel and horizontal guide rods 5 are respectively arranged on the side of the base 1 near the four corners. The outer walls of the four guide rods 5 are slidably sleeved with the same male mold head 4 and the same female mold base 6. The male mold head 4 is a rectangular box-shaped structure with an opening facing the base 1, and a cavity 402 recessed inwardly is reserved at the bottom of the side of the male mold head 4 away from the base 1. A steam heating pipe 7 coiled around the convex surface of the cavity 402 is fixed to the inner wall of the male mold head 4, and an air inlet pipe 17 and a cold air pipe 8 with nozzles facing the convex surface of the cavity 402 are respectively inserted on the upper and lower surfaces of the male mold head 4; the female mold base 6 is a rectangular box-shaped structure with an opening opposite to the opening of the male mold head 4, and a core convex head 60 adapted to the cavity 402 is reserved in the middle of the box bottom of the female mold base 6. 2. A grooved guard rail 19 with an opening toward the middle and parallel to each other is fixed on the periphery of the bottom of the female mold base 6 near the core protrusion 602. The extension direction of the grooved guard rail 19 is perpendicular to the plane where the bottom of the female mold base 6 is located. A plurality of grooved guard rails 19 are slidably connected with convex sliders 24, and a buffer spring 27 is fixed between the plurality of convex sliders 24 and the bottom inner wall of the female mold base 6; a heat-conducting contact head 25 that matches the concave surface of the core protrusion 602 is fixed between the plurality of convex sliders 24; a mold base air inlet pipe 16 is inserted on the side of the female mold base 6 at the edge of the concave surface of the core protrusion 602, and when the heat-conducting contact head 25 is pulled out for a distance, a gap is formed between its outer wall and the concave surface of the core protrusion 602, and the air outlet of the mold base air inlet pipe 16 is inclined toward the entrance of the gap.

[0053] The present invention provides a rapid cooling and heating injection mold for automobile accessories. By arranging a steam heating tube 7 coiled around the cavity 402 and cooperating with the cold air tube 1 8 and the air inlet tube 2 17 on both sides thereof, when the inner wall of the cavity 402 needs to be heated before injection molding, it is only necessary to quickly introduce high-temperature steam into the steam heating tube 7. Since the steam comes and goes very quickly, the heating speed of the cavity 402 is greatly improved. When the core protrusion 602 on the other side needs to be heated, it is only necessary to push the high-temperature heat-conducting contact head 25 toward the concave bottom of the core protrusion 602 and fit it thereto, so that each position can be quickly heated, and the effect of uniform heating can be achieved. When the injection molding is completed and cooling is required, the high-temperature steam in the steam heating tube 7 is evacuated, and the heat is dissipated by blowing air at the same time. On one side of the mother mold base 6, it is only necessary to remove the fitted heat-conducting contact head 25 first, leave a gap, and then cool it by air.

[0054] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0055] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0056] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0057] Example 1, please refer to Figure 1 , Figure 3 and Figure 8 A rapid cooling and heating injection mold for automobile accessories, wherein a base 1 is provided with an injection port 12 with an expanded opening facing outward and an overall conical structure in the middle of one side away from a male mold head 4, the injection port 12 is connected to a glue outlet of an injection molding machine, and a pouring nozzle 14 is inserted and fixed in a pipe opening at one end of the injection port 12 close to the male mold head 4, and a constant temperature device is provided on the outer wall of the pouring nozzle 14; an injection nozzle 403 matching the pouring nozzle 14 is reserved in the middle of the bottom of the cavity 402;

[0058] During injection molding, first turn on the constant temperature device, and insert the glue outlet of the injection molding machine into the injection port 12 and close it. After the mold is closed and preheated, the outlet end of the pouring nozzle 14 is tightly fitted with the inlet of the injection tube 403. At this time, injection molding can quickly inject the molten plastic into the cavity formed by the cavity 402 and the core protrusion 602, and the finished decorative part 30 is formed after cooling.

[0059] Please refer to Figure 8 , Fig.13 , a rapid cooling and heating injection mold for automobile accessories, the circumferential inner wall of the injection nozzle 403 is a truncated cone structure, and the aperture of the injection nozzle 403 close to the base 1 is larger than the aperture of the cavity 402. After the finished decorative part 30 is cooled and formed, the ejector mechanism is used to demold the cooled finished decorative part 30. At the same time, the hard plastic residue in the injection nozzle 403 can be broken off. Since the structure here is similar to a cone, the elastic thrust generated when breaking off can be used to bounce the residue in the injection nozzle 403 in the opposite direction, that is, collapse to one side of the base 1, avoiding the need to cut off the residue of the injection nozzle in the later stage, thereby improving production efficiency.

[0060] Please refer to Figure 2 , Figure 8-Figure 10 , the base 1 is located at one side of the male die head 4, and the four corners are fixed with cushion blocks 2, and the guide rods 5 are respectively fixed on the surface of the corresponding cushion blocks 2; the surface of each cushion block 2 is fixed with a compression spring 3, and the compression spring 3 is sleeved on the outer wall of the corresponding guide rod 5, and the end of the compression spring 3 close to the male die head 4 is fixed with a guide block 406, and the four guide blocks 406 are respectively fixed on the inner wall of the male die head 4 near the four corners; each guide block 406 is opened on the side close to the base 1, and the shaft plug hole is welded and fixed with a wear-resistant slide tube 31; the wear-resistant slide tube 31 runs through the left and right sides of the male die head 4; the guide rod 5 is slidably inserted in the corresponding wear-resistant slide tube 31;

[0061] After the injection molding is completed, the squeezing force on the female mold base 6 will be slowly removed along the axial direction of the guide rod 5. At this time, under the action of four compression springs 1-3, the base 1 and the male mold head 4 will be separated first, that is, the contact point between the pouring nozzle 14 and the injection nozzle 403 will be separated, which is beneficial to the rapid cooling of the residue inside the injection nozzle 403 and facilitates the breaking operation during the later demolding; and the male mold head 4 and the female mold base 6 can be pushed away together to form a sequential demolding.

[0062] Example 2, reference Figure 5-Figure 6 , a rapid cooling and heating injection mold for automobile accessories provided in Example 1 is further optimized. Specifically, rectangular slots 601 are reserved near the four corners of the side of the female mold base 6 close to the male mold head 4, and the bottom of the rectangular slots 601 are provided with jacks coaxial with the guide rod 5; hooks 28 are fixed near the middle of the upper surfaces of the female mold base 6 and the base 1; when installing, the female mold base 6, the male mold head 4 and the base 1 can be combined into one, and then hoisted, which is conducive to accurately and quickly fixing the device on the injection molding machine.

[0063] Please refer to Figure 3 , Figure 11-13 , a heat dissipation hole 1 401 and a heat dissipation hole 2 404 are respectively provided on the front and rear sides of the male mold head 4, and an identification plate is inserted on the lower surface of the male mold head 4 to mark the inlet and outlet of the steam heating tube 7; the steam heating tube 7 also includes a spiral tube 701 spirally wound on the convex surface of the cavity 402, and the convex surface of the cavity 402 is provided with a spiral groove 408 that matches the shape of the spiral tube 701; a cover plate 9 is fixed at the opening of the male mold head 4, and a circular hole 2 902 that matches the diameter of the injection tube mouth 403 is provided in the middle of the cover plate 9; two mutually symmetrical wind gathering blocks 32 are fixed between the cover plate 9 and the bottom of the box of the male mold head 4, and the two wind gathering blocks 32 Two symmetrical wind guide guard plates 26 are fixed between the two wind gathering blocks 32, which are respectively located on the front and rear sides of the male mold head 4, and the wind guide guard plates 26 are provided with air inlets, which are respectively connected with the pipe openings of the cold air pipe 1 8 and the air inlet pipe 2 17; the pipe openings of the cold air pipe 1 8, the air inlet pipe 2 17 and the mold base air inlet pipe 16 are all arranged in a flat-mouth expansion structure, which can apply the airflow to the target surface in a large range; it plays a role in assisting uniform heat dissipation, and can also blow the cold air evenly on the surface of the spiral tube 701; the convex surface of the cavity 402 is located at the gap of the spiral tube 701 and is provided with a rectangular groove 407; it is used to accelerate the heat dissipation of the cavity 402.

[0064] Example 3, reference Figure 3-Figure 4, a rapid cooling and heating injection mold for automotive accessories provided in Example 1 is further optimized. Specifically, two symmetrical L-shaped fixing frames are fixed at the bottom of the box of the female mold base 6, and the ends of the two L-shaped fixing frames close to the heat-conducting contact head 25 are fixed with electromagnets 23; the end of the heat-conducting contact head 25 away from the core protrusion 602 is provided with two embedding grooves, and the two embedding grooves are fixed with permanent magnets 22 that match the position of the electromagnet 23. When the electromagnet 23 is energized, the end of the permanent magnet 22 close to the electromagnet 23 will generate a repulsive force, and at this time, the heat-conducting contact head 25 will be pushed to be inserted into the concave surface of the core protrusion 602, forming a seamless contact, and then quickly transferring heat to it.

[0065] Reference Figure 3 A pressure-bearing thick plate 20 is fixed at the opening of the female mold base 6, and two centrally symmetrical strip holes 21 are opened on the pressure-bearing thick plate 20 for heat dissipation.

[0066] Reference Figure 1 , Figure 2 , Figure 8 and Fig.10 , a pin mechanism for assisting material discharging is provided on the cover plate 9, and the pin mechanism includes two circular holes 901 provided on the cover plate 9 and distributed symmetrically about the circular hole 902; two stepped grooves 405 corresponding to the circular holes 901 are provided at the bottom of the cavity 402, and an ejection hole is provided at the bottom of the stepped groove 405, in which a sliding bearing 2903 is embedded; an ejection rod 2901 is slidably connected in the sliding bearing 2903, and a round cover pressure head 29 is fixed at one end of the ejection rod 2901 close to the base 1, the diameter of the round cover pressure head 29 is smaller than the aperture of the circular hole 901, and a return spring 2902 is fixed between the round cover pressure head 29 and the sliding bearing 2903; by providing the round cover pressure head 29 and the ejection rod 2901, when it is necessary to discharge the material, it is only necessary to press the two round cover pressure heads 29 inward from one side of the base 1 at the same time.

[0067] Reference Figure 1 , Figure 2 , Figure 8 and Fig.10Two bearing frames 11 are fixed on the surface of the cover plate 9, which are symmetrically distributed with respect to each other, and anti-slip bearings are clamped in the two bearing frames 11, and long shafts are rotatably connected in the anti-slip bearings. The ends of the two long shafts are respectively fixed with synchronous pulleys 13 which are symmetrical with respect to each other, and the two synchronous pulleys 13 are respectively fixed with trapezoidal thrust blocks 1301 which are symmetrical with respect to each other on the side close to the cover plate 9; the same toothed conveyor belt 15 is wound between the circumferential outer walls of the two synchronous pulleys 13; a fixing block is fixed on the side of the toothed conveyor belt 15, and the cover plate 9 is provided with a plurality of fixed blocks. A push rod fixing seat 18 is fixed to one side of the surface of 9 close to the fixed block, and an electric push rod 10 is fixed in the middle of the push rod fixing seat 18, and the end of the extension rod of the electric push rod 10 is fixed to the surface of the fixed block; through the set electric push rod 10 and two trapezoidal push blocks 1301 distributed symmetrically with the center, when it is necessary to press the two round cover pressing heads 29 at the same time, it is only necessary to control the extension rod of the electric push rod 10 to extend, and at this time, the protruding parts of the two trapezoidal push blocks 1301 can squeeze the two round cover pressing heads 29 to move axially, and then eject the finished decorative part 30.

[0068] The use process of the rapid cooling and heating injection mold for automobile accessories provided by the present invention is as follows:

[0069] Before injection molding, the device is assembled first. At this time, the switches of the cold air pipe 1 8, the air inlet pipe 2 17 and the mold base air inlet pipe 16 are first turned off, and the two electromagnets 23 in the female mold base 6 are controlled to be energized. At this time, the heat-conducting contact head 25 is pushed into the concave surface of the core convex head 602 under the action of repulsion to form a seamless contact, and then the heat is quickly transferred to it; and the male mold head 4 on the other side is also quickly introduced into the steam heating pipe 7. After the mold cavity 402 and the core convex head 602 are heated, injection molding can be carried out; when the injection molding is completed and cooling is required, the extrusion force on the female mold base 6 can be slowly removed so that the female mold base 6 and the male mold head 4 leave the base together in a bite state. This is the first stage;

[0070] At this time, the high-temperature steam in the steam heating tube 7 can be extracted, and then the cold air pipe 1 8 and the air inlet pipe 2 17 in the male mold head 4 are opened to start cooling the convex surface of the cavity 402. At this time, the electromagnet 23 is controlled to be powered off, and under the action of four buffer springs 27, the tightly attached heat-conducting contact head 25 is pulled out. When the heat-conducting contact head 25 is pulled out for a distance, a gap will be formed between its outer wall and the concave surface of the core convex head 602. The mold base air inlet pipe 16 is opened, and its air outlet is tilted toward the entrance of the gap to inject cold air for heat dissipation; after the finished decorative part 30 is cooled and formed, the ejector mechanism is used to cool the finished decorative part after cooling. 30 is demoulded, and at the same time, the hard plastic residue in the injection nozzle 403 can be broken off. Since the structure here is similar to a cone, the residue in the injection nozzle 403 can be bounced back with the elastic thrust generated when breaking off; by setting the electric push rod 10 and two trapezoidal push blocks 1301 distributed symmetrically with the center, when it is necessary to press the two round cover pressing heads 29 at the same time to eject the finished decorative part 30, it is only necessary to control the extension rod of the electric push rod 10 to extend, and at this time, the protruding parts of the two trapezoidal push blocks 1301 can squeeze the two round cover pressing heads 29 to move axially, and then eject the finished decorative part 30.

[0071] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0072] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific embodiments, or to perform equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of the present invention, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.

Claims

1. A rapid cooling and heating injection mold for automobile accessories, characterized in that: The invention comprises a base (1), wherein four mutually parallel and horizontal guide rods (5) are respectively arranged on the side of the base (1) near the four corners, the outer walls of the four guide rods (5) are slidably sleeved with the same male die head (4) and the same female die base (6), the opening of the male die head (4) faces the base (1), and a cavity (402) recessed inwardly is reserved at the bottom of the side of the male die head (4) away from the base (1), a steam heating pipe (7) coiled around the convex surface of the cavity (402) is fixed on the inner wall of the male die head (4), and an air inlet pipe (17) and a cold air pipe (8) with nozzles facing the surface of the convex surface of the cavity (402) are respectively inserted on the upper surface and the lower surface of the male die head (4); the opening of the female die base (6) is connected to the male die head (4) ) is opposite to the opening of the mold base (402), and a core protrusion (602) matching the mold cavity (402) is reserved in the middle of the box bottom of the mother mold base (6), and a groove-shaped guard rail (19) with an opening facing the middle and parallel to each other is fixed on the box bottom of the mother mold base (6) near the periphery of the core protrusion (602), and a plurality of convex sliders (24) are slidably connected in the groove-shaped guard rails (19), and a buffer spring (27) is fixed between the plurality of convex sliders (24) and the bottom inner wall of the mother mold base (6); a heat-conducting abutment head (25) matching the concave surface of the core protrusion (602) is fixed between the plurality of convex sliders (24); and a mold base air inlet pipe (16) at the concave edge facing the core protrusion (602) is inserted on the side of the mother mold base (6); The front and rear sides of the male mold head (4) are respectively provided with heat dissipation hole one (401) and heat dissipation hole two (404), and the lower surface of the male mold head (4) is plugged with an identification plate for identifying the inlet and outlet of the steam heating pipe (7); the steam heating pipe (7) further comprises a spiral tube (701) spirally wound on the convex surface of the cavity (402), and the convex surface of the cavity (402) is provided with a spiral groove (408) matching the shape of the spiral tube (701); a cover plate one (9) is fixed at the opening of the male mold head (4), and a circular hole two (902) matching the diameter of the injection tube mouth (403) is provided in the middle of the cover plate one (9); the cover plate one (9) and the male mold head (4) are connected to each other. Two mutually symmetrical wind gathering blocks (32) are fixed between the box bottom of the head (4), and the two wind gathering blocks (32) are respectively located at the front and rear sides of the male mold head (4); two mutually symmetrical wind guide guard plates (26) are fixed between the two wind gathering blocks (32), and the wind guide guard plates (26) are provided with air inlets, and the two air inlets are respectively connected to the pipe openings of the cold air pipe 1 (8) and the air inlet pipe 2 (17); the pipe openings of the cold air pipe 1 (8), the air inlet pipe 2 (17) and the mold base air inlet pipe (16) are all arranged in a flat mouth expansion structure, and the convex surface of the cavity (402) is provided with a rectangular groove (407) at the gap of the spiral tube (701).

2. The rapid cooling and heating injection mold for automobile accessories according to claim 1, characterized in that: An injection port (12) with an outwardly flared and tapered structure is provided in the middle of one side of the base (1) away from the male mold head (4), and a pouring nozzle (14) is inserted and fixed in the pipe opening at one end of the injection port (12) close to the male mold head (4), and a constant temperature device is provided on the outer wall of the pouring nozzle (14); an injection nozzle (403) matching the pouring nozzle (14) is reserved in the middle of the bottom of the mold cavity (402).

3. The rapid cooling and heating injection mold for automobile accessories according to claim 2, characterized in that: The circumferential inner wall of the injection nozzle (403) is in a truncated cone structure, and the aperture of the injection nozzle (403) at one end close to the base (1) is larger than the aperture at one end of the cavity (402).

4. The rapid cooling and heating injection mold for automobile accessories according to claim 1, characterized in that: The base (1) is fixed with pads (2) at four corners on one side of the male die head (4), and the guide rods (5) are respectively fixed on the surface of the corresponding pads (2); a compression spring (3) is fixed on the surface of each pad (2), and the compression spring (3) is sleeved on the outer wall of the corresponding guide rod (5); a guide block (406) is fixed at one end of the compression spring (3) close to the male die head (4), and the four guide blocks (406) are respectively fixed on the inner wall of the male die head (4) close to four corners; each guide block (406) is opened on one side close to the base (1), and a wear-resistant sliding tube (31) is welded and fixed in the shaft plug hole; the wear-resistant sliding tube (31) passes through the left and right sides of the male die head (4); the guide rod (5) is slidably inserted in the corresponding wear-resistant sliding tube (31).

5. The rapid cooling and heating injection mold for automobile accessories according to claim 4, characterized in that: A rectangular slot (601) is reserved near the four corners of the side of the female mold base (6) close to the male mold head (4), and a socket coaxial with the guide rod (5) is opened at the bottom of the rectangular slot (601); a hook (28) is fixed near the middle of the upper surface of the female mold base (6) and the base (1).

6. The rapid cooling and heating injection mold for automobile accessories according to claim 1, characterized in that: Two symmetrical L-shaped fixing frames are fixed at the bottom of the box of the female mold base (6), and the ends of the two L-shaped fixing frames close to the heat-conducting contact head (25) are fixed with electromagnets (23); the end of the heat-conducting contact head (25) away from the core protrusion (602) is provided with two embedding grooves, and permanent magnets (22) adapted to the position of the electromagnet (23) are fixed in the two embedding grooves, and the end of the permanent magnet (22) close to the electromagnet (23) generates a repulsive force when the electromagnet (23) is energized.

7. The rapid cooling and heating injection mold for automobile accessories according to claim 1, characterized in that: A pressure-bearing thick plate (20) is fixed at the opening of the female mold base (6), and the pressure-bearing thick plate (20) has two centrally symmetrical strip-shaped holes (21).

8. The rapid cooling and heating injection mold for automobile accessories according to claim 1, characterized in that: The cover plate 1 (9) is provided with an ejector mechanism for assisting in discharging, and the ejector mechanism comprises two circular holes 1 (901) provided on the cover plate 1 (9) and distributed symmetrically with respect to the circular hole 2 (902); the cavity bottom of the mold cavity (402) is provided with two stepped grooves (405) corresponding to the circular holes 1 (901), and the groove bottom of the stepped groove (405) is provided with an ejection hole, in which a sliding bearing (2903) is embedded; an ejector rod (2901) is slidably connected to the sliding bearing (2903), and a round cover pressing head (29) is fixed to one end of the ejector rod (2901) close to the base (1), the diameter of the round cover pressing head (29) is smaller than the hole diameter of the circular hole 1 (901), and a return spring (2902) is fixed between the round cover pressing head (29) and the sliding bearing (2903).

9. The rapid cooling and heating injection mold for automobile accessories according to claim 8, characterized in that: The surface of the cover plate 1 (9) is fixed with two bearing frames (11) which are centrally symmetrically distributed with each other, and the two bearing frames (11) are both clamped with anti-slip bearings, and the anti-slip bearings are both rotatably connected with long shafts, and the ends of the two long shafts are respectively fixed with synchronous pulleys (13) which are centrally symmetrical with each other, and the two synchronous pulleys (13) are respectively fixed with trapezoidal thrust blocks (1301) which are centrally symmetrical with each other on one side close to the cover plate 1 (9); a same toothed conveyor belt (15) is wound between the circumferential outer walls of the two synchronous pulleys (13); a fixing block is fixed to the side of the toothed conveyor belt (15), and a push rod fixing seat (18) is fixed to the surface of the cover plate 1 (9) on one side close to the fixing block, and an electric push rod (10) is fixed in the middle of the push rod fixing seat (18), and the end of the extension rod of the electric push rod (10) is fixed to the surface of the fixing block.

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