A noise reduction gate structure of a vehicle lamp injection mold

Abstract

The utility model discloses a kind of car lamp injection mould noise reduction gate structure, it is related to injection mould technical field, its technical key points include pedestal, the end surface of the pedestal is equipped with lower mould, the end surface of the lower mould is installed with upper mould, the end surface of the lower mould is equipped with injection cavity, main channel and gate slot, the inside of the gate slot is equipped with auxiliary mechanism, the auxiliary mechanism includes fixedly connected in the inside of gate slot fixed plate, the side fixedly connected with guide plate of fixed plate near main channel.The utility model is provided with two fixed blocks at the connecting place of main channel and gate slot, a channel with width less than main channel will be generated between two fixed blocks, the channel will first force throttle to high-speed melt entering gate slot, reduce its speed and pressure, two baffles and guide plates are set in rear, melt after pre-depressurization is impacted on baffle and guide plate, and secondary kinetic energy consumption is carried out.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, specifically relating to a noise reduction gate structure for automotive headlight injection molds. Background Technology

[0002] Injection molds are specialized tools used in plastic molding and processing. They can process molten plastic raw materials into products of specific shapes. In automotive lighting manufacturing, the production of plastic parts mainly relies on injection molds, which are used to produce various plastic structural and exterior parts for automotive lights.

[0003] In the existing injection molding production process, the high-temperature molten plastic flows along the injection molding machine nozzle, through the mold runner, and finally into the cavity through the gate. When the high-melt plastic impacts the inner wall of the cavity at high speed, it will instantly compress the air in the cavity, causing the air to flow and compress rapidly in the narrow gap, forming airflow disturbance. At the same time, the friction speed between the melt and the gate edge and the cavity wall is intensified. Under the dual effect, the dynamic friction noise is directly amplified. Utility Model Content

[0004] The purpose of this utility model is to provide a noise-reducing gate structure for automotive headlight injection molds, in order to solve the problem that high-melt plastic entering the cavity too quickly during the use of existing injection molds can easily generate noise.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A noise-reducing gate structure for an automotive headlight injection mold includes a base, a lower mold on the end face of the base, an upper mold mounted on the end face of the lower mold, an injection cavity, a main channel, and a gate groove on the end face of the lower mold, an auxiliary mechanism inside the gate groove, the auxiliary mechanism including a fixing plate fixedly connected inside the gate groove, a guide plate fixedly connected to the side of the fixing plate near the main channel, and fixing blocks installed on both sides of the inner wall of the gate groove.

[0007] Preferably, four guide pillars are fixedly installed on the end face of the lower mold, the upper mold is installed on the end face of the lower mold by means of the four guide pillars, the main channel is connected to the sprue groove, and the sprue groove is connected to the injection cavity.

[0008] Preferably, rectangular grooves are provided on both sides of the inner wall of the gating groove, and a rectangular column adapted to the rectangular groove is fixedly connected to the side wall of the fixing block.

[0009] Preferably, the surface of the fixing block is provided with an insertion hole, the inner wall of the insertion hole is slidably fitted with a baffle, and both sides of the inner wall of the sprue groove are provided with a slot adapted to the baffle.

[0010] Preferably, the side of the fixing block away from the fixing plate is tilted away from the main channel.

[0011] Preferably, the guide plate has a triangular cross-sectional shape.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model sets two fixing blocks at the connection between the main channel and the gate groove. A channel with a width smaller than the main channel is generated between the two fixing blocks. This channel first forces the high-speed melt entering the gate groove to throttle, reducing its speed and pressure. Two baffles and guide plates are set behind it. The melt that has been pre-pressurized then impacts the baffles and guide plates, resulting in secondary kinetic energy consumption. The guide plates can also disperse the melt to both sides. The diffusion angle helps guide the melt to spread to both sides instead of spraying in a straight line, further reducing the speed of the melt and thus reducing the noise of the melt in the injection cavity.

[0014] 2. This utility model, by distributing two baffles in a staggered manner, allows the melt to undergo a secondary impact, which further reduces the kinetic energy of the melt. The two baffles are set to be slidable, which on the one hand allows the length of the baffles to be adjusted, thereby adjusting the contact area between the baffles and the melt; on the other hand, by sliding the baffles into the slot, the fixing block can be stabilized. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a top view of the lower mold of this utility model.

[0017] Figure 3 This utility model Figure 2 A partial structural diagram of the central main channel and gating groove;

[0018] Figure 4 This is a schematic diagram showing the disassembled structure of the fixing block and baffle of this utility model.

[0019] In the diagram: 1. Base; 101. Lower mold; 102. Upper mold; 103. Injection cavity; 104. Main channel; 105. Sprue groove; 106. Guide column; 2. Auxiliary mechanism; 201. Fixing plate; 2011. Guide plate; 202. Fixing block; 203. Baffle; 204. Rectangular column; 205. Rectangular groove; 206. Insertion hole; 207. Slot. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Reference Figures 1-4 As shown, this utility model provides a noise reduction gate structure for a vehicle headlight injection mold, including a base 1, a lower mold 101 on the end face of the base 1, an upper mold 102 installed on the end face of the lower mold 101, and an injection cavity 103, a main channel 104 and a gate groove 105 opened on the end face of the lower mold 101.

[0022] In an optional embodiment: four guide pillars 106 are fixedly installed on the end face of the lower mold 101, and the upper mold 102 is installed on the end face of the lower mold 101 by means of the four guide pillars 106. The main channel 104 is connected to the sprue groove 105, and the sprue groove 105 is connected to the injection cavity 103.

[0023] It should be noted that the above technology is prior art. The guide post 106 serves to install the upper mold 102 on the lower mold 101. Both the lower mold 101 and the upper mold 102 are provided with cooling channels, and the bottom of the lower mold 101 is provided with an ejector pin for easy demolding. The above is a technology well known to those skilled in the art, and will not be elaborated on here.

[0024] In an optional embodiment: an auxiliary mechanism 2 is provided inside the sprue groove 105. The auxiliary mechanism 2 includes a fixing plate 201 fixedly connected inside the sprue groove 105. A guide plate 2011 is fixedly connected to the side of the fixing plate 201 near the main channel 104. Fixing blocks 202 are installed on both sides of the inner wall of the sprue groove 105.

[0025] In this embodiment, the guide plate 2011 provides a clear and robust impact surface, forcing the high-melt plastic to change direction and spread to both sides along the inclined surface of the guide plate 2011, thereby reducing the speed of the high-melt plastic.

[0026] Rectangular grooves 205 are provided on both sides of the inner wall of the gating groove 105, and rectangular columns 204 that are adapted to the rectangular grooves 205 are fixedly connected to the side wall of the fixing block 202.

[0027] It should be noted that the sliding of the rectangular column 204 and the rectangular groove 205 facilitates the installation and disassembly of the fixing block 202.

[0028] In an optional embodiment: the surface of the fixing block 202 is provided with an insertion hole 206, the inner wall of the insertion hole 206 is slidably fitted with a baffle 203, and both sides of the inner wall of the sprue groove 105 are provided with a slot 207 that is adapted to the baffle 203.

[0029] It should be noted that the two baffles 203 are staggered, allowing the melt to undergo a secondary impact, which further reduces the kinetic energy of the melt. The two baffles 203 are designed to be slidable. On the one hand, the length of the baffles 203 can be adjusted to regulate the contact area between the baffles 203 and the melt. On the other hand, by sliding the baffles 203 into the slot 207, the fixing block 202 can be stabilized. The rectangular column 204 and the baffles 203 have different orientations, which makes the fixing block 202 more stable. The baffles 203 are stabilized by the friction between themselves and the insertion hole 206 and are not easily slid by external forces.

[0030] In an alternative embodiment, the side of the fixing block 202 away from the fixing plate 201 is tilted away from the main channel 104.

[0031] It should be noted that this facilitates the entry of high-melt plastic into the channel between the two fixed blocks 202.

[0032] In an alternative embodiment, the guide plate 2011 has a triangular cross-sectional shape.

[0033] It should be noted that the guide plate 2011 can disperse the melt to both sides. The angle of diffusion helps to guide the melt to spread to both sides, rather than spraying in a straight line, further reducing the speed of the melt and allowing the high-melt plastic to slowly enter the injection cavity 103.

[0034] The working principle of this utility model is as follows: In use, the operator first installs the fixing block 202 inside the sprue groove 105, inserts the rectangular column 204 into the rectangular groove 205, then pushes the baffle 203, which slides along the inside of the insertion hole 206 until it is finally inserted into the slot 207. Because the rectangular column 204 and the baffle 203 have different orientations, the fixing block 202 will be more stable. Then, after installing the upper mold 102 on the lower mold 101, high-melt plastic is injected into the main channel 104. When the high-melt plastic enters the sprue groove 105, it will first interact with the two fixing blocks. When the blocks 202 come into contact, the high-melt plastic will flow out from the channel between the two fixed blocks 202 due to the obstruction of the two fixed blocks 202. The channel between the two fixed blocks 202 reduces the speed of the high-melt plastic. Then the high-melt plastic will pass through the two baffles 203 again, reducing its speed again, and finally hit the guide plate 2011. Since the cross-section of the guide plate 2011 is triangular, the high-melt plastic will disperse to both sides. At this time, the speed of the high-melt plastic has been reduced, and it will slowly enter the injection cavity 103. After that, the high-melt plastic in the injection cavity 103 will cool and solidify, and the workers can then demold it.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, whether directly or indirectly applied to other related technical fields, are similarly within the scope of protection of this utility model patent.

Claims

1. A noise-reducing gate structure for a vehicle headlight injection mold, comprising a base (1), wherein a lower mold (101) is provided on the end face of the base (1), an upper mold (102) is mounted on the end face of the lower mold (101), and the end face of the lower mold (101) is provided with an injection cavity (103), a main channel (104), and a gate groove (105), characterized in that, An auxiliary mechanism (2) is provided inside the gating groove (105). The auxiliary mechanism (2) includes a fixing plate (201) fixedly connected inside the gating groove (105). A guide plate (2011) is fixedly connected to the side of the fixing plate (201) near the main channel (104). Fixing blocks (202) are installed on both sides of the inner wall of the gating groove (105).

2. The noise-reducing gate structure for a vehicle headlight injection mold according to claim 1, characterized in that: The lower mold (101) has four guide pillars (106) fixedly installed on its end face. The upper mold (102) is installed on the end face of the lower mold (101) by means of the four guide pillars (106). The main channel (104) is connected to the sprue groove (105), and the sprue groove (105) is connected to the injection cavity (103).

3. The noise-reducing gate structure for a vehicle headlight injection mold according to claim 1, characterized in that: The inner wall of the gating groove (105) is provided with rectangular grooves (205) on both sides, and the side wall of the fixing block (202) is fixedly connected with a rectangular column (204) that is compatible with the rectangular groove (205).

4. The noise-reducing gate structure for a vehicle headlight injection mold according to claim 1, characterized in that: The surface of the fixing block (202) is provided with an insertion hole (206), and a baffle (203) is slidably inserted into the inner wall of the insertion hole (206). Both sides of the inner wall of the gating groove (105) are provided with a slot (207) that matches the baffle (203).

5. The noise-reducing gate structure for a vehicle headlight injection mold according to claim 1, characterized in that: The side of the fixing block (202) away from the fixing plate (201) is tilted away from the main channel (104).

6. The noise-reducing gate structure for a vehicle headlight injection mold according to claim 1, characterized in that: The cross-sectional shape of the guide plate (2011) is triangular.

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