Injection molding device for automobile injection molding part

Abstract

The utility model provides an injection molding device for an automobile injection molding part. The injection molding device for the automobile injection molded part comprises an injection molding mechanism and a mold closing mechanism, wherein a nozzle end of the injection molding mechanism is correspondingly arranged at an input end of the mold closing mechanism; the mold closing mechanism comprises a front mold frame, and the front mold frame is formed by splicing and welding a first bracket and a second bracket; a first injection channel is transversely formed in the middle of the first support in a penetrating mode, a heating piece is arranged on the periphery of the first injection channel, and the diameter of the end, facing the second support, of the first injection channel is gradually reduced from inside to outside to be in a circular truncated cone shape. A cooling piece is arranged on the periphery of the second injection channel, the diameter of the end, facing the first injection channel, of the second injection channel is gradually reduced from inside to outside to be in a circular truncated cone shape, and the end of the second injection channel and the end of the first injection channel are matched. According to the utility model, the first injection channel and the second injection channel are arranged on the front mold frame for respectively cooling and heating, and the cooling state and the heating state are staggered, so that the curing demolding operation of the mold closing mechanism can be matched, and the melt state of the injection molding mechanism can also be matched.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile injection molding, in particular to an injection molding device for automobile injection molding parts. Background Art

[0002] An injection molding machine is generally composed of a clamping system, an injection molding system, etc. The injection molding system plasticizes the material evenly into a melt, and injects a certain amount of melt into the mold with sufficient pressure and speed. The clamping system fixes the mold, realizes the opening and closing action of the mold, and ensures that the mold is reliably locked and the product is ejected during injection and pressure holding.

[0003] After the injection molding machine injects the molten plastic into the mold, the clamping system needs to cool and solidify the melt in the mold before demolding. However, since there is a connecting section between the clamping system and the injection molding system, the cooling process will affect the material state of the connecting section between the clamping system and the injection molding system. Because the mold is cooled and solidified, but the injection molding system requires a molten state, the intersection of the two may be in an unsolidified or fully solidified state. If it is unsolidified, it will affect the demolding operation. If it is fully solidified, it will affect the next melt injection operation. Utility Model Content

[0004] Based on this, it is necessary to provide an injection molding device for automobile injection molded parts to address the problem that the material state of the connection section between the existing injection molding system and the clamping system cannot take into account the solidification state of the clamping system and the melt state of the injection molding system.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An injection molding device for automobile injection molding parts comprises an injection molding mechanism and a mold clamping mechanism, wherein the nozzle end of the injection molding mechanism is correspondingly arranged at the input end of the mold clamping mechanism; the mold clamping mechanism comprises a front mold frame, which is welded by a first bracket and a second bracket;

[0007] A first sprue is disposed transversely through the middle of the first bracket, a heating element for keeping the molten plastic warm is disposed on the outer periphery of the first sprue, the end of the first sprue facing the second bracket gradually decreases in diameter from inside to outside to form a truncated cone, and the other end of the first sprue serves as an input end of the mold clamping mechanism;

[0008] A second sprue is transversely provided in the middle of the second bracket, and a cooling member for cooling the molten plastic is provided on the outer periphery of the second sprue. The end of the second sprue facing the first sprue gradually decreases in diameter from inside to outside to form a truncated cone, and the ends of the two sprues are matched.

[0009] When the cooling element performs a cooling operation, the heating element is in a waiting state; when the injection molding mechanism performs an injection molding operation, the heating element is in a heating state.

[0010] Furthermore, the heating element includes a heat-conducting layer, a heating element and a heat-insulating layer; a heat-conducting layer is arranged on the periphery of the first injection channel, the heat-conducting layer is coated on the periphery of the first injection channel and avoids the truncated cone-shaped end of the first injection channel; the heat-insulating layer is arranged on the periphery of the heat-conducting layer and maintains a fixed distance from the heat-conducting layer, and the heating element is located in the gap between the heat-conducting layer and the heat-insulating layer.

[0011] Furthermore, a sealing ring is provided at the end of the first sprue close to the nozzle end of the injection molding mechanism to close the gap between the end of the heat conductive layer and the end of the heat insulating layer.

[0012] Furthermore, the cooling component includes a cooling jacket, a water inlet pipe and a water outlet pipe; the cooling jacket is arranged on the outer periphery of the second injection channel and avoids the truncated cone-shaped end of the second injection channel, and a closed cavity is arranged inside the cooling jacket; the water inlet pipe and the water outlet pipe are arranged on the two end sides of the cooling jacket, one end of the water inlet pipe and the water outlet pipe is connected to the cavity of the cooling jacket, and the other end crosses the second bracket along the radial direction of the cooling jacket and is located outside the second bracket.

[0013] Furthermore, one end of the water inlet pipe and the water outlet pipe located outside the second bracket is connected to the pipe connector.

[0014] Furthermore, the heating element includes a heat-conducting sleeve and a heating device; the heat-conducting sleeve is transversely provided through the middle of the first bracket, the inner cavity of the heat-conducting sleeve constitutes the first injection channel, and the heating device is embedded in the wall of the heat-conducting sleeve.

[0015] Furthermore, a wire channel is provided on the first bracket to connect the wire port of the heating device on the outer wall of the heat-conducting sleeve with the external wire.

[0016] Furthermore, the cooling component includes a cooling jacket, a water inlet pipe and a water outlet pipe; a cooling jacket is transversely provided in the middle of the second bracket, the inner cavity of the cooling jacket constitutes a second injection channel, the end of the cooling jacket away from the first bracket extends to the outside of the second bracket and is respectively connected to the water inlet pipe and the water outlet pipe, and the interior of the cooling jacket is provided with relatively symmetrical closed cavities, the water inlet pipe and the water outlet pipe are connected to the two closed cavities one by one, and the two closed cavities are connected to each other at one end close to the first injection channel.

[0017] Furthermore, a groove for accommodating the water outlet pipe and the water inlet pipe is formed on the end surface of the second bracket.

[0018] Furthermore, the outer wall of the nozzle end of the injection molding mechanism is sealed and connected to the inner wall of the first sprue of the first bracket.

[0019] Compared with the prior art, the beneficial effects of the utility model include:

[0020] 1. The utility model provides a first sprue and a second sprue on the front mold frame to perform cooling and heating operations respectively. The cooling and heating states are staggered and do not affect each other. It can cooperate with the solidification demoulding operation of the mold clamping mechanism and the melt state of the injection molding mechanism.

[0021] 2. The utility model reduces the diameter of the connection between the first injection channel and the second injection channel, thereby satisfying the requirement for the molten material to pass through while reducing the influence of temperature and facilitating the breaking and separation of the solidified material. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0023] Figure 1 This is a structural schematic diagram of an injection molding device for automobile injection molding parts introduced in the utility model;

[0024] Figure 2 Based on Figure 1 A front view of an injection molding device for an automobile injection molding part;

[0025] Figure 3 Based on Figure 1 An internal schematic diagram of the front mold frame introduced in Example 1;

[0026] Figure 4 Based on Figure 1 Schematic diagram of the interior of the front mold frame introduced in Example 2.

[0027] Explanations in the figure: 100, injection molding mechanism; 200, clamping mechanism; 3, front mold frame; 31, first bracket; 32, second bracket; 33, heating element; 331, heat-conducting layer; 332, heating element; 333, heat-insulating layer; 334, sealing ring; 335, heat-conducting sleeve; 336, heating device; 34, cooling element; 341, cooling sleeve; 342, water inlet pipe; 343, water outlet pipe. DETAILED DESCRIPTION

[0028] It is easy to understand that according to the technical solution of the utility model, without changing the essential spirit of the utility model, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the utility model, and should not be regarded as the entirety of the utility model or as a limitation or restriction to the technical solution of the utility model.

[0029] Example 1

[0030] See also Figure 1-2This embodiment introduces an injection molding device for automobile injection molding parts, which includes an injection molding mechanism 100, a mold clamping mechanism 200, and a control system. The injection molding mechanism 100 adopts an existing structure, that is, it includes a plasticizing structure (screw, barrel, nozzle, heating ring, etc.), a hopper, a metering device, a screw transmission device, an injection cylinder, etc. The mold clamping mechanism 200 includes an existing front fixed template, a rear movable template, a pull rod, a mold clamping cylinder, a mold clamping structure, a mold adjustment structure, a product ejection structure and a safety protection structure, etc. The control system is used to control the injection molding mechanism 100 and the mold clamping mechanism 200. Since the existing structure is adopted, no further details will be given here.

[0031] The mold clamping mechanism 200 also has a front mold frame 3 for installing the front fixed mold plate, and the front mold frame 3 is welded by a first bracket 31 and a second bracket 32. The first sprue and the second sprue are respectively arranged transversely through the middle of the first bracket 31 and the second bracket 32, and the ends of the first sprue of the first bracket 31 and the second sprue of the second bracket 32 ​​are fitted and connected, and the ends of the first sprue and the second sprue facing each other gradually reduce in diameter from the inside to the outside, forming a truncated cone shape, and the truncated cone ends of the first sprue and the second sprue are fitted and have the same diameter.

[0032] The nozzle end of the injection molding mechanism 100 is located inside the other end of the first sprue, that is, the end of the first sprue away from the second sprue. In order to prevent the melt from leaking from the connection between the first sprue and the nozzle end of the injection molding mechanism 100, the two are sealed. For example, welding can be used for sealing, or the nozzle end of the injection molding mechanism 100 is set to a cone shape, and the outer surface is covered with a high-temperature resistant elastic material. After the nozzle end of the injection molding mechanism 100 enters the first sprue, it is compressed to fill the gap between the nozzle end and the first sprue, so as to achieve a sealed connection between the two. Other sealed connection methods can also be used, not limited to the methods described above, as long as they can meet the requirements of the sealed connection between the two.

[0033] like Figure 3 As shown, a heating element 33 is provided on the periphery of the first injection channel, which can not only keep the molten plastic warm, but also re-melt the solidified or semi-solidified plastic of the first injection channel. The heating element 33 includes a heat-conducting layer 331, a heating element 332 and a heat-insulating layer 333. The heat-conducting layer 331 is inside, and the heat-insulating layer 333 is outside. The heating element 332 is located between the heat-conducting layer 331 and the heat-insulating layer 333. The heating element 332 can be a heating resistor. The power supply wire can be located outside the first bracket 31 through the gap between the heat-insulating layer 333 and the heat-conducting layer 331. The other gaps at the ends of the heat-insulating layer 333 and the heat-conducting layer 331 are closed by a sealing ring 334 to avoid accidental contact while also reducing heat loss. It should be noted that the heat-conducting layer 331 avoids the truncated cone end portion of the first injection channel.

[0034] like Figure 3As shown, a cooling member 34 is provided on the periphery of the second injection channel, and the cooling member 34 includes a cooling jacket 341, a water inlet pipe 342 and a water outlet pipe 343. The cooling jacket 341 is located on the periphery of the second injection channel, and a cavity is provided inside the jacket wall of the cooling jacket 341 around the circumferential direction of the jacket wall, and the cavity is annular as a whole, and basically covers the entire jacket wall of the cooling jacket 341. The water inlet pipe 342 and the water outlet pipe 343 are respectively provided at both ends of the cooling jacket 341, and one end of the water inlet pipe 342 and the water outlet pipe 343 are fixedly connected to the two ends of the cooling jacket 341, and the water inlet pipe 342 and the water outlet pipe 343 are connected to the cavity, and the other end crosses the second bracket 32 ​​along the radial direction of the cooling jacket 341 and is located outside the second bracket 32, and is connected to the pipeline connector, and can be connected to the external water supply pipeline and drainage pipeline. In order to facilitate the water inlet pipe 342 and the water outlet pipe 343 to vertically run through the second bracket 32, a cavity is pre-opened on the second bracket 32. It should be noted that the cooling jacket 341 avoids the truncated cone end of the second sprue.

[0035] When the material in the second injection channel needs to be cooled, cooling water enters the cavity of the cooling jacket 341 from the water inlet pipe 342 and is then discharged from the water outlet pipe 343 to take away heat and accelerate the solidification of the material in the second injection channel.

[0036] When the injection molding mechanism 100 is performing injection molding, the heating element 33 works and the cooling element 34 stops working. When the injection molding mechanism 100 stops injection molding, the heating element 33 stops working and the cooling element 34 works. After the material in the mold is solidified, the mold closing mechanism 200 performs a demoulding operation. The truncated cone ends of the first sprue and the second sprue are in a solidified state. After breaking, it is convenient to demould the molded part of the mold. After demoulding, the heating element 33 works immediately to restore the semi-solidified or solidified material in the first sprue to a molten state to cooperate with the injection operation of the injection molding mechanism 100.

[0037] In this embodiment, the first sprue and the second sprue are arranged on the front mold frame 3 to perform cooling and heating operations respectively. The cooling and heating states are staggered and do not affect each other. It can cooperate with the curing and demolding operation of the clamping mechanism 200 and the melt state of the injection molding mechanism 100. The diameter of the connection between the first sprue and the second sprue is reduced to meet the requirement of the molten material passing through while reducing the influence of temperature, and also facilitate the breaking and separation of the solidified material.

[0038] Example 2

[0039] like Figure 4As shown, this embodiment introduces an injection molding device for automobile injection molding parts, which has a structure basically the same as that of the injection molding device for automobile injection molding parts introduced in Example 1. The difference is that the heating element 33 of this embodiment adopts a heat-conducting sleeve 335 and a heating device 336. The heating device 336 can adopt a heating resistor, and the heating device 336 is embedded in the heat-conducting sleeve 335. The wire port of the heating device 336 is located on the outer wall of the heat-conducting sleeve 335. The heat-conducting sleeve 335 is transversely arranged inside the first bracket 31. The inner cavity of the heat-conducting sleeve 335 constitutes a first injection channel. A wire channel is provided on the first bracket 31, so that the wire port of the heating device 336 on the outer wall of the heat-conducting sleeve 335 is connected with an external wire, and the heating device 336 can be powered through the wire channel.

[0040] In addition, although the cooling member 34 uses a cooling jacket 341, a water inlet pipe 342 and a water outlet pipe 343, the middle of the cooling jacket 341 crosses the second bracket 32, and the inner cavity of the cooling jacket 341 constitutes a second injection channel. The end of the cooling jacket 341 away from the first bracket 31 extends to the outside of the second bracket 32 ​​and is respectively connected to the water inlet pipe 342 and the water outlet pipe 343. The interior of the cooling jacket 341 is provided with symmetrical closed cavities, and the water inlet pipe 342 and the water outlet pipe 343 are connected to the two closed cavities in a one-to-one correspondence. The two closed cavities are connected at one end close to the first injection channel. In order to facilitate the connection of the second bracket 32 ​​with the front fixed template, a second bracket 3 2 is provided with a groove for accommodating the outlet pipe 343 and the inlet pipe 342. Since the outlet pipe 343 and the inlet pipe 342 are located inside the end face of the second bracket 32 ​​through the groove and do not protrude from the end face of the second bracket 32, the connection between the front fixed template and the second bracket 32 ​​is not affected. Moreover, since the outlet pipe 343 and the inlet pipe 342 are distributed longitudinally along the cooling jacket 341, and the ends of the outlet pipe 343 and the inlet pipe 342 are located outside the second bracket 32, they can be connected to the external water supply pipeline and drainage pipeline through pipeline connectors.

[0041] This embodiment has the same beneficial effects as Embodiment 1.

[0042] The technical scope of the present invention is not limited to the contents described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical concept of the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. An injection molding device for automobile injection molded parts, comprising an injection molding mechanism (100) and a mold clamping mechanism (200), wherein the nozzle end of the injection molding mechanism (100) is correspondingly arranged at the input end of the mold clamping mechanism (200); characterized in that: The mold clamping mechanism (200) comprises a front mold frame (3), and the front mold frame (3) is welded together by a first bracket (31) and a second bracket (32); A first sprue is disposed transversely through the middle of the first bracket (31), a heating element (33) for keeping molten plastic warm is disposed on the periphery of the first sprue, the end of the first sprue facing the second bracket (32) gradually decreases in diameter from inside to outside to form a truncated cone, and the other end of the first sprue serves as an input end of the mold clamping mechanism (200); A second sprue is transversely provided through the middle of the second bracket (32), a cooling member (34) for cooling molten plastic is provided on the outer periphery of the second sprue, and the diameter of the end of the second sprue facing the first sprue gradually decreases from the inside to the outside to form a truncated cone, and the ends of the two sprues are matched; When the cooling element (34) performs a cooling operation, the heating element (33) is in a waiting state; when the injection molding mechanism (100) performs an injection molding operation, the heating element (33) is in a heating state.

2. The injection molding device for automobile injection molded parts according to claim 1, characterized in that: The heating element (33) comprises a heat-conducting layer (331), a heating element (332) and a heat-insulating layer (333); the heat-conducting layer (331) is arranged on the periphery of the first injection channel, the heat-conducting layer (331) covers the periphery of the first injection channel and avoids the truncated cone-shaped end of the first injection channel; the heat-insulating layer (333) is arranged on the periphery of the heat-conducting layer (331) and maintains a fixed distance from the heat-conducting layer (331), and the heating element (332) is located in the gap between the heat-conducting layer (331) and the heat-insulating layer (333).

3. The injection molding device for automobile injection molded parts according to claim 2, characterized in that: A sealing ring (334) is provided at the end of the first sprue close to the nozzle end of the injection molding mechanism (100) to seal the gap between the end of the heat conductive layer (331) and the end of the heat insulating layer (333).

4. The injection molding device for automobile injection molded parts according to claim 1, characterized in that: The cooling member (34) comprises a cooling jacket (341), a water inlet pipe (342) and a water outlet pipe (343); the cooling jacket (341) is arranged on the outer periphery of the second injection channel and avoids the truncated cone-shaped end of the second injection channel, and a closed cavity is arranged inside the cooling jacket (341); the water inlet pipe (342) and the water outlet pipe (343) are respectively arranged on the two end sides of the cooling jacket (341), one end of the water inlet pipe (342) and the water outlet pipe (343) are connected to the cavity of the cooling jacket (341), and the other end thereof radially crosses the second bracket (32) along the cooling jacket (341) and is located outside the second bracket (32).

5. The injection molding device for automobile injection molded parts according to claim 4, characterized in that: One end of the water inlet pipe (342) and the water outlet pipe (343) located outside the second bracket (32) is connected to the pipeline connector.

6. The injection molding device for automobile injection molded parts according to claim 1, characterized in that: The heating element (33) comprises a heat-conducting sleeve (335) and a heating device (336); the heat-conducting sleeve (335) is transversely arranged in the middle of the first bracket (31), the inner cavity of the heat-conducting sleeve (335) constitutes a first injection channel, and the heating device (336) is embedded in the wall of the heat-conducting sleeve (335).

7. The injection molding device for automobile injection molded parts according to claim 6, characterized in that: The first bracket (31) is provided with a wire channel for connecting a wire port of a heating device (336) on the outer wall of the heat-conducting sleeve (335) with an external wire.

8. The injection molding device for automobile injection molded parts according to claim 6, characterized in that: The cooling member (34) comprises a cooling jacket (341), a water inlet pipe (342) and a water outlet pipe (343); a cooling jacket (341) is transversely arranged in the middle of the second bracket (32); an inner cavity of the cooling jacket (341) constitutes a second injection channel; an end of the cooling jacket (341) away from the first bracket (31) extends to the outside of the second bracket (32) and is respectively connected to the water inlet pipe (342) and the water outlet pipe (343); a symmetrical closed cavity is arranged inside the cooling jacket (341); the water inlet pipe (342) and the water outlet pipe (343) are connected to the two closed cavities in a one-to-one correspondence; and the two closed cavities are connected to each other at one end close to the first injection channel.

9. The injection molding device for automobile injection molded parts according to claim 8, characterized in that: A groove for accommodating a water outlet pipe (343) and a water inlet pipe (342) is provided on the end surface of the second bracket (32).

10. The injection molding device for automobile injection molding according to claim 1, characterized in that: The outer wall of the nozzle end of the injection molding mechanism (100) is sealedly connected to the inner wall of the first sprue of the first bracket (31).

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