Injection mold for mesh product on rear side of vehicle

Abstract

The utility model relates to the field of molds, in particular to a vehicle rear side surrounding mesh product injection mold which comprises a movable mold, an ejector plate and a pouring block, a comb-shaped notch is formed in the pouring block, the pouring block is attached to one inner wall of the movable mold to enable the notch to form a comb-shaped flow channel, a main channel of the flow channel is communicated with a pouring gate of the mold, and the main channel of the flow channel is communicated with the ejector plate of the mold. And a comb tooth channel of the runner is communicated with a mold cavity of the mold. According to the scheme, a sizing material enters the main channel through the pouring gate and then flows through the comb tooth channel, and the mold cavity is filled with the sizing material at the same time, so that the injection molding time is greatly shortened, and the problems that in the prior art, the injection molding time is too long, and weld lines or material shortage of injection molding products occur due to the too long injection molding time are solved.

Description

Technical Field

[0001] The utility model relates to the field of molds, in particular to an injection mold for a vehicle rear side enclosure mesh product. Background Art

[0002] When the factory is processing the rear side panel products of vehicles, since the products contain many strip-shaped mesh holes, when the liquid rubber is injected into the mold cavity through the gate, the space in the mold cavity is curved and long, which makes the injection time long. Too long injection time will cause the temperature of the rubber in the mold cavity to drop, and its fluidity will also decrease accordingly, resulting in the phenomenon of weld lines on the injection molded products. At the same time, due to the reduced fluidity of the rubber, some places may not be fully filled with rubber, resulting in material shortages in the injection molded products. Utility Model Content

[0003] The utility model aims to provide an injection mold for a mesh product of a rear side enclosure of a vehicle, so as to solve the problem in the prior art that the injection molding time is too long and the resulting weld line or material shortage of the injection molded product.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an injection mold for a vehicle rear side mesh product, comprising a movable mold, an ejector plate, and a casting block, wherein a comb-shaped notch is opened on the casting block, and the casting block is fitted with an inner wall of the movable mold so that the notch forms a comb-shaped flow channel, the main channel of the flow channel is connected to the gate of the mold, and the comb tooth channel of the flow channel is connected to the mold cavity of the mold.

[0005] The principle of this scheme is: in actual processing, the rubber material is injected into the main channel of the runner through the gate, and then flows through each comb tooth channel into the mold cavity, and at the same time, the rubber material is filled into each strip space, thereby completing the injection molding of the product in a shorter time.

[0006] The beneficial effects of this program are:

[0007] 1. Greatly shorten the injection time;

[0008] 2. Due to the short injection time, the fluidity of the rubber is less affected, so the rubber fills the space in the mold cavity in time and fully, and the product is not prone to weld lines or material shortages.

[0009] Preferably, as an improvement, it further includes an inclined ejector rod, the movable mold is provided with an inclined hole, the inclined ejector rod passes through the inclined hole, one end of the inclined ejector rod is connected to the casting block, and the end is inclined in a direction away from the inner wall, and the other end of the inclined ejector rod is horizontally slidably connected to the ejector plate.

[0010] After the rubber material is injected and cooled, the injection molded product needs to be demolded. In this solution, the ejector plate moves upward, the movable mold remains stationary, and the ejector pins on the ejector plate pass through the movable mold to support the injection molded product and demold it upward. Since the inclined ejector rod passes through the movable mold obliquely and is horizontally slidably connected to the ejector plate, the inclined ejector rod will move upward, and the casting block connected to it will not separate from the injection molded body of the product. At the same time, the inclined ejector rod will also move horizontally in the direction away from the inner wall. At this time, the casting block will separate from the inner wall of the movable mold and gradually separate from the solid sprue in the runner, thereby completing the demolding.

[0011] Preferably, as an improvement, the main channel is a curved channel.

[0012] Since the initial flow rate of the rubber material is relatively fast, but too fast injection speed may cause uneven flow of the melt, resulting in defects such as bubbles, warping, and cracking in the internal structure. Therefore, this solution designs a bending pass to control the excessive injection speed, which helps to improve the injection quality. In addition, this design can also prevent the casting block from interfering with the product during the horizontal movement of the product demolding.

[0013] Preferably, as an improvement, the angle at which the inclined push rod deviates from the vertical direction is 10°-15°.

[0014] In this solution, this design can reduce the horizontal sliding distance of the pouring block during the rise of the ejector plate, thereby avoiding interference with the injection molded product during demolding. At the same time, the pouring block has sufficient horizontal movement distance to separate it from the water outlet in the runner.

[0015] Preferably, as an improvement, the number of the inclined push rods is 2 and they are arranged along the main road direction.

[0016] In this solution, this design makes the casting block more stable compared to one inclined ejector rod.

[0017] Preferably, as an improvement, the movable mold is provided with a plurality of auxiliary demoulding columns, the casting block is provided with column grooves having the same number as the auxiliary demoulding columns, the auxiliary demoulding columns are placed in the column grooves, the column grooves are communicated with the main track, and there is a gap between the auxiliary demoulding columns and the movable mold.

[0018] In this solution, designing an auxiliary demoulding column on the movable mold helps to separate the casting block from the nozzle.

[0019] Preferably, as an improvement, the length of the auxiliary demoulding column extending into the column groove is greater than or equal to 3 mm.

[0020] In this solution, if the length of the auxiliary demoulding column extending into the column groove is too short, it will be separated from the sprue when the ejector plate just starts to move, and it cannot play a good role in separating the auxiliary sprue from the casting block. This design can avoid such problems.

[0021] Preferably, as an improvement, if the length of the column groove is less than or equal to the stroke of the ejector plate, the length of the auxiliary demoulding column extending into the column groove is less than the length of the column groove; if the length of the column groove is greater than the stroke of the ejector plate, the length of the auxiliary demoulding column extending into the column groove is less than the stroke of the ejector plate.

[0022] In this solution, the auxiliary demoulding column will neither exceed the length of the column groove to extend into the main channel to hinder the flow of rubber in the main channel, nor exceed the stroke of the ejector plate to cause it to remain in the sprue after the sprue completes its upward movement.

[0023] Preferably, as an improvement, the gap between the auxiliary demoulding column and the inner wall is greater than or equal to 1 mm.

[0024] In this solution, when the casting block is separated from the sprue, the design can ensure that the auxiliary demoulding column will not easily break the sprue and fail to assist the sprue to be separated from the casting block.

[0025] Preferably, as an improvement, the number of the auxiliary demoulding columns is 2.

[0026] In this solution, since the main channel is longer, this design allows the auxiliary demoulding column to assist the entire nozzle in separating it from the casting block. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of Example 1 of the utility model.

[0028] Figure 2 This is a structural front view of Example 1 of the utility model.

[0029] Figure 3 This is a schematic diagram of the pouring block after horizontal movement in Example 1 of the utility model.

[0030] Figure 4 This is a schematic diagram of the separation of the casting block and the nozzle in Example 1 of the utility model.

[0031] The reference numerals in the accompanying drawings include: product 1, casting block 2, inclined ejector 3, main channel 4, comb channel 5, angle of the inclined ejector deviating from the vertical direction 6, column groove 7, water nozzle 8, and rib 9. DETAILED DESCRIPTION

[0032] The following is further described in detail through specific implementation methods:

[0033] Example 1

[0034] Basically as attached Figure 1 As shown: An injection mold for a vehicle rear side mesh product, including a movable mold, an ejector plate, an ejector and other basic structures (these structures are not shown in the figure). Figure 1 ), and also includes a casting block 2, on which a comb-shaped notch is provided, which is used to fit with an inner wall of the movable mold so that the notch forms a comb-shaped flow channel, and the comb shape is the shape of a common single-row rib comb (i.e., having a main skeleton and a row of a plurality of comb teeth perpendicular thereto). The flow channel includes a main channel 4 and a plurality of comb tooth channels 5, the main channel 4 is connected to the gate of the mold, and the comb tooth channels 5 are connected to the mold cavity of the mold. During actual processing, the rubber material for injection molding is injected into the main channel 4 through the gate, and is divided into each comb tooth channel 5 through the main channel 4, and then flows into the mold cavity through each comb tooth channel 5, so that the rubber material simultaneously fills each strip space in the mold cavity, thereby achieving the purpose of completing the injection molding of the product 1 in a relatively short time.

[0035] Through the design of the above structure, this embodiment can greatly shorten the injection molding time of product 1. Due to the short injection molding time, the fluidity of the rubber is less affected, so the rubber fills the space in the mold cavity in a timely and sufficient manner, and product 1 is not prone to weld lines or material shortages, thereby achieving the purpose of solving the problems in the prior art.

[0036] After completing the above-mentioned injection molding, the injection molded product needs to be demolded. Here, those skilled in the art can design various demolding methods. As one of the implementation methods, this embodiment designs a tilted ejector rod 3, one end of which is connected to the casting block 2. The connection method between the two can be various. As an example, the connection method adopted in this embodiment is pin clamping. At the same time, an inclined hole is set on the movable mold, and the tilted ejector rod passes through the inclined hole. The end of the tilted ejector rod 3 close to the casting block 2 is inclined in the direction away from the inner wall, and the other end of the tilted ejector rod 3 is horizontally slidably connected to the ejector plate. Here, those skilled in the art can adopt various common sliding methods. As an example, this embodiment sets a tilted ejector seat on the ejector plate, and the tilted ejector seat is provided with a slide groove. The tilted ejector rod is fixedly connected to the slider by screws, and the slider is set in the slide groove. During actual demoulding, the ejector plate moves upward, the movable mold remains stationary, and the ejector on the ejector plate passes through the movable mold to push the injection molded product 1 upward for demoulding. Since the inclined ejector rod 3 passes through the movable mold at an angle and is horizontally slidably connected to the ejector plate, the inclined ejector rod 3 will move upward, and the casting block connected to it will not separate from the injection molded body of the product 1. At the same time, the inclined ejector rod 3 will also move horizontally in the direction away from the inner wall. At this time, the casting block 2 will be separated from the inner wall of the movable mold and gradually separated from the water inlet 8 in the runner, thereby completing the demoulding of the product 1.

[0037] In this embodiment, the main channel 4 can be a straight channel or a curved channel. As an example, this embodiment adopts a curved channel for two reasons: 1. When the rubber is injected into the main channel 4, due to the injection pressure, the flow rate of the rubber is generally faster, which is beneficial to reducing the injection time. However, too fast an injection speed may cause uneven flow of the melt, forming defects such as bubbles, warping, and cracking in the internal structure. Therefore, designing a curved channel to control the excessively fast injection speed is beneficial to improving the injection quality; 2. Due to the complex structure of the product 1, designing a curved channel can enable the casting block 2 to avoid interference with the injection molded product 1 during horizontal movement during demolding.

[0038] Regarding the degree of inclination of the inclined ejector rod 3, in this embodiment, Figure 3 As shown, the product 1 is provided with ribs 9. When the product 1 is demoulded, the distance from the edge of the casting block 2 to the ribs 9 is the maximum distance that the inclined ejector 3 can move in the horizontal direction. Therefore, when designing the degree of inclination of the inclined ejector 3, the distance of the ejector plate moving upward and the maximum distance should be comprehensively considered and calculated to avoid interference between the casting block 2 and the product 1, and at the same time, the casting block 2 should be kept separate from the nozzle 8. It can be understood that if Figure 2 As shown, the smaller the tilt of the lift rod 3, that is, the smaller the angle 6 of the lift rod from the vertical direction, the smaller the horizontal movement distance under the same rising distance. As an example, the angle 6 of the lift rod from the vertical direction is designed to be 10°-15° in this embodiment, so that the casting block 2 and the product 1 will not interfere with each other during demoulding, and the casting block 2 has enough movement distance in the horizontal direction to separate it from the nozzle 8, as shown in FIG. Figure 4 , which shows a schematic diagram of the casting block 2 being separated from the nozzle 8 during demoulding. Preferably, the angle 6 of the inclined ejector rod deviating from the vertical direction is 12°.

[0039] Regarding the number of inclined ejector rods 3, as an example, the present embodiment designs the number to be 2, and they are arranged along the main road direction. Compared with 1 inclined ejector rod, 2 inclined ejector rods make the casting block 2 more stable. In other embodiments, if the casting block 2 is small, those skilled in the art may design 1 inclined ejector rod. If the casting block 2 is large or long, those skilled in the art may design the number of inclined ejector rods to be greater than 2. This embodiment does not make any specific limitation here.

[0040] Regarding the separation of the pouring block 2 and the nozzle 8, when the ejector plate rises and the ejector lifts the injection molded product 1, the pouring block 2 moves upward together with the nozzle 8, and at the same time, the pouring block 2 also has a horizontal movement in the direction away from the inner wall. During this horizontal movement, the pouring block 2 and the nozzle 8 are gradually separated. In this embodiment, since the nozzle 8 is relatively slender and has many branches, when it is separated from the pouring block 2, it may be carried by the pouring block 2 in the horizontal direction for a short distance. As an improvement, this embodiment is provided with a plurality of auxiliary demoulding columns (not shown in the accompanying drawings) on the movable mold, and a column groove 7 with the same number as the auxiliary demoulding columns is provided on the pouring block 2, and the auxiliary demoulding columns are placed in the column groove 7, and the column groove 7 is connected with the main track 4, and there is a gap between the auxiliary demoulding columns and the movable mold. In actual processing, when the rubber flows through the main channel 4 and the comb channel 5 to fill the mold cavity, the column groove 7 will also be filled, and the auxiliary demolding column placed in the column groove 7 will be filled with rubber. Later, during the demolding process of the injection molded product 1, when the casting block 2 just starts to move horizontally away from the inner wall of the movable mold, the casting block 2 drives the sprue 8 to move horizontally. At this time, the auxiliary demolding column is still surrounded by the sprue 8, and the auxiliary demolding column is located on the movable mold and will not move horizontally with the casting block 2. Therefore, the auxiliary demolding column has a force in the opposite direction to the sprue 8, which causes the sprue 8 to separate from the casting block 2. In addition, the sprue 8 moves upward under the action of the ejector pin, and the auxiliary demolding column will not move upward with the sprue 8. Therefore, the two will gradually separate with this upward movement. From the results, the auxiliary demolding column helps to separate the casting block 2 from the sprue 8.

[0041] Regarding the length of the auxiliary demoulding column extending into the column groove 7, in this embodiment, as an example, the length of the auxiliary demoulding column extending into the column groove 7 is designed to be greater than or equal to 3 mm. Under this design, the auxiliary demoulding column will not be separated from the water outlet 8 when the ejector plate just starts to move due to the extension being too short, resulting in it not being able to play a corresponding role in separating the water outlet 8 from the casting block 2. In addition, if the length of the column groove 7 is less than or equal to the distance the ejector plate moves upward, that is, the stroke of the ejector plate, the length of the auxiliary demoulding column extending into the column groove 7 is less than the length of the column groove 7. Under this design, the auxiliary demoulding column will not hinder the flow of the rubber in the main channel 4 due to extending into the main channel 4; if the length of the column groove 7 is greater than the stroke of the ejector plate, then the length of the auxiliary demoulding column extending into the column groove 7 is less than the stroke of the ejector plate. Under this design, the auxiliary demoulding column is completely separated from the water outlet 8 when the water outlet 8 completes its upward movement.

[0042] As for the gap between the auxiliary demoulding column and the inner wall of the movable mold, as an example, the present embodiment designs the gap to be greater than or equal to 1 mm. When the casting block 2 is brought to the nozzle 8 for horizontal movement, the auxiliary demoulding column will provide an opposite force to the nozzle 8. At this time, if there is no gap between the auxiliary demoulding column and the inner wall or the gap is too small, the auxiliary demoulding column may easily break the nozzle 8 and separate from the nozzle 8, thereby failing to separate the auxiliary nozzle 8 from the casting block 2.

[0043] Regarding the number of auxiliary demoulding columns, in this embodiment, since the main channel 4 is relatively long, if the number of auxiliary demoulding columns is too small, the auxiliary demoulding columns will not play a significant role at a distance from the main channel 4. As an example, this embodiment designs this number to be 2, so that the auxiliary demoulding columns can assist the entire sprue 8 in being separated from the casting block 2. In other embodiments, if the flow channel is relatively short, those skilled in the art may design the number of auxiliary demoulding columns to be 1. If the flow channel is relatively long and / or the number of bends is relatively large, those skilled in the art may design the number of auxiliary demoulding columns to be greater than or equal to 2. This embodiment does not impose any specific restrictions here, as long as the auxiliary demoulding columns can assist the sprue 8 in being completely separated from the casting block 2 during demoulding.

[0044] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An injection mold for a vehicle rear side mesh product, comprising a movable mold and an ejector plate, characterized in that: It also includes a casting block, which has a comb-shaped groove. The casting block fits with an inner wall of the movable mold so that the groove forms a comb-shaped flow channel. The main channel of the flow channel is connected to the gate of the mold, and the comb tooth channel of the flow channel is connected to the mold cavity of the mold.

2. The vehicle rear side mesh product injection mold according to claim 1, characterized in that: It also includes an inclined ejector rod, the movable mold is provided with an inclined hole, the inclined ejector rod passes through the inclined hole, one end of the inclined ejector rod is connected to the casting block, the end is inclined in the direction away from the inner wall, and the other end of the inclined ejector rod is horizontally slidably connected to the ejector plate.

3. The vehicle rear side mesh product injection mold according to claim 1, characterized in that: The main road is a curved channel.

4. The vehicle rear side mesh product injection mold according to claim 2, characterized in that: The angle at which the inclined ejector rod deviates from the vertical direction is 10°-15°.

5. The vehicle rear side mesh product injection mold according to claim 2, characterized in that: The number of the inclined push rods is 2, and they are arranged along the main road direction.

6. The vehicle rear side mesh product injection mold according to claim 1, characterized in that: The movable mold is provided with a plurality of auxiliary demoulding columns, the casting block is provided with column grooves having the same number as the auxiliary demoulding columns, the auxiliary demoulding columns are placed in the column grooves, the column grooves are communicated with the main track, and there is a gap between the auxiliary demoulding columns and the movable mold.

7. The vehicle rear side mesh product injection mold according to claim 6, characterized in that: The length of the auxiliary demoulding column extending into the column groove is greater than or equal to 3 mm.

8. The vehicle rear side mesh product injection mold according to claim 6, characterized in that: If the length of the column groove is less than or equal to the stroke of the ejector plate, the length of the auxiliary demoulding column extending into the column groove is less than the length of the column groove; if the length of the column groove is greater than the stroke of the ejector plate, the length of the auxiliary demoulding column extending into the column groove is less than the stroke of the ejector plate.

9. The vehicle rear side mesh product injection mold according to claim 6, characterized in that: The gap between the auxiliary demoulding column and the movable mold is greater than or equal to 1 mm.

10. The vehicle rear side mesh product injection mold according to claim 6, characterized in that: The number of the auxiliary demoulding columns is 2.

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