Automatic ejection water outlet mold for injection molding

Abstract

The utility model discloses an automatic ejection water outlet mold for injection molding, which comprises an upper mold assembly, the upper mold assembly comprises an upper mold frame, a fixing plate, an upper mold plate and a stripper plate which are sequentially arranged, the stripper plate is provided with a stripping ejector pin and a mold core, the mold core is provided with a sprue and a water outlet runner connected with the sprue, and the sprue is provided with a water outlet. The upper mold assembly is provided with a water gap ejection assembly for automatically ejecting water gap waste during mold opening, the water gap ejection assembly comprises an ejector pin hole and an air pressure driving cavity, the ejector pin hole is formed in the upper mold assembly and communicated with the water gap runner, the air pressure driving cavity is communicated with the ejector pin hole, and a water gap ejection ejector pin is arranged in the ejector pin hole; the upper die assembly is provided with a driving gas circuit communicated with the pneumatic driving cavity; the water gap ejection assembly is arranged in the mold, so that the mold pressing risk of the mold is reduced, the injection molding period is shortened, peripheral auxiliary equipment is reduced, the equipment maintenance cost is reduced, the injection molding stability is improved, and the cost is reduced and the efficiency is improved on the whole.

Description

[Technical field]

[0001] The utility model relates to the technical field of injection molds, in particular to an automatic ejector mold for injection molding. [Background technology]

[0002] The sprue refers to the joint formed between the frame and the parts when the factory is molding the injection molded product. Under traditional technology, the sprue is clamped by a robot after injection molding and placed on a dedicated recycling device. However, the above method is prone to risks such as the sprue not being demolded or the sprue breaking and falling during the clamping process. At the same time, in the entire product injection molding cycle, the robot clamping the sprue takes a lot of time. In addition, the robot needs regular maintenance and inspection during long-term operation, and frequent maintenance increases the maintenance cost of the equipment. [Contents of the utility model]

[0003] In order to solve the above problems, thereby improve product quality, shorten the injection molding cycle, reduce the frequency of equipment maintenance, and thus reduce production costs, the utility model proposes an injection molding automatic ejection outlet mold, which synchronously pushes down the outlet when the mold is opened, and does not require a robot to clamp the equipment, thereby reducing production costs and improving production efficiency.

[0004] The utility model is realized by the following technical solutions:

[0005] An automatic ejector nozzle mold for injection molding comprises an upper mold assembly, wherein the upper mold assembly comprises an upper mold frame, a fixed plate, an upper mold plate, and a stripper plate which are arranged in sequence, wherein the stripper plate is provided with a stripper ejector pin and a mold core, wherein the mold core is provided with a nozzle and a nozzle flow channel connected to the nozzle, wherein the upper mold assembly is provided with a nozzle ejector assembly which automatically ejects nozzle waste when the mold is opened, wherein the nozzle ejector assembly comprises an ejector pin hole which is arranged in the upper mold assembly and communicates with the nozzle flow channel, and a pneumatic drive cavity which is communicated with the ejector pin hole, wherein a nozzle ejector pin is arranged in the ejector pin hole, and wherein a driving air path which is communicated with the pneumatic drive cavity is provided on the upper mold assembly.

[0006] In the injection molding automatic ejector mold as described above, the pneumatic drive chamber sequentially includes a first drive chamber located on the fixed plate and a second drive chamber provided on the upper mold plate; the first drive chamber is connected to the second drive chamber and corresponds to each other.

[0007] In the injection molding automatic ejector outlet mold as described above, the ejector hole includes a first ejector hole provided on the upper mold plate, a second ejector hole provided on the stripper plate, and a third ejector hole provided on the mold core; the first ejector hole, the second ejector hole, and the third ejector hole are sequentially connected and correspond one to one.

[0008] In the injection molding automatic ejector water outlet mold as described above, the first ejector pin hole is connected to the second driving cavity and the diameter of the first ejector pin hole is smaller than that of the second driving cavity.

[0009] In the injection molding automatic ejector nozzle mold as described above, one end of the nozzle ejector pin is provided with a pressure piston corresponding to the air pressure drive chamber, and the pressure piston is provided with a high-temperature sealing ring that fits tightly with the air pressure drive chamber.

[0010] In the injection molding automatic ejector nozzle mold as described above, the nozzle ejector pin is provided with a fork-shaped needle head which seals and fits the gap at the nozzle joint, and the diameter of the nozzle ejector pin is larger than the diameter of the nozzle flow channel.

[0011] In the injection molding automatic ejector nozzle mold as described above, the ejector pins and nozzle ejector pins are both multiple and distributed on the nozzle flow channel.

[0012] In the injection molding automatic ejector water outlet mold as described above, the inner wall of the air pressure driven cavity is a mirror-finished surface.

[0013] In the automatic dewatering outlet mold for injection molding as described above, at least two groups of the water outlet ejection components are provided.

[0014] In the injection molding automatic ejector water outlet mold as described above, the gas introduced into the driving gas circuit when the mold is opened synchronously is a high-pressure gas of 3-9 MPA.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] 1. This mold only needs to design the structure of the automatic ejection outlet in the mold, without upgrading the injection molding equipment, and can eliminate the robot clamping equipment to reduce costs;

[0017] 2. This mold applies pressure to the ejector pin through high-pressure gas to automatically eject the sprue out of the mold at the moment of mold opening. When the mold is locked, the ejector pin automatically returns to the original position, which significantly improves the stability of sprue separation, reduces the risk of mold compression, improves the overall quality of the product, and effectively shortens the injection molding cycle.

Brief Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of the utility model in a non-working state;

[0020] Figure 2 It is a schematic diagram of the working state structure of the utility model;

[0021] Figure 3 For the utility model Figure 2 A magnified schematic diagram of the structure in the middle;

[0022] Figure 4 This is a schematic diagram of the ejector pin distribution of the utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the ejector pin of the water outlet in the utility model;

[0024] Figure 6 It is a schematic diagram of the junction between the ejector pin of the nozzle and the nozzle flow channel in the utility model. [Specific implementation method]

[0025] Specific embodiments, such as Figures 1 to 6 The automatic dewatering mold for injection molding shown in the figure includes an upper mold component 1, and the upper mold component 1 includes an upper mold frame 11, a fixed plate 12, an upper mold plate 13, and a stripper plate 14 which are arranged in sequence. The stripper plate 14 is provided with a stripper pin 15 and a mold core 16, and the mold core 16 is provided with a nozzle 17 and a sprue flow channel 18 connected to the nozzle 17. The upper mold component 1 is provided with a sprue ejection component 2 which automatically ejects sprue waste when the mold is opened. The sprue ejection component 2 includes an ejector hole 21 which is arranged in the upper mold component 1 and communicates with the sprue flow channel 18, and an air pressure driving chamber 22 which is connected with the ejector hole 21. A sprue ejector pin 23 is installed in the ejector hole 21, and the upper mold component 1 is provided with a driving air path 24 which is connected with the air pressure driving chamber 22.

[0026] Preferably, at least two groups of the water nozzle ejection assembly 2 are arranged, and the pneumatic drive chamber 22 sequentially includes a first drive chamber 221 located on the fixed plate 12 and a second drive chamber 222 arranged on the upper template 13; the first drive chamber 221 is connected to the second drive chamber 222 and corresponds to each other.

[0027] Preferably, the ejector hole 21 includes a first ejector hole 211 provided on the upper template 13, a second ejector hole 212 provided on the stripper plate 14, and a third ejector hole 213 provided on the mold core 16; the first ejector hole 211, the second ejector hole 212, and the third ejector hole 213 are sequentially connected and correspond one to one.

[0028] Preferably, the first ejector hole 211 is communicated with the second driving cavity 222 , and the diameter of the first ejector hole 211 is smaller than that of the second driving cavity 222 .

[0029] Preferably, one end of the sprue ejector pin 23 made of corrosion-resistant steel is provided with a pressure piston 231 corresponding to the pneumatic driving chamber 22, and the pressure piston 231 is provided with a high-temperature sealing ring 233 tightly fitting with the pneumatic driving chamber 22, ensuring the integrity of the high-pressure gas seal and the ejection stability of the sprue ejector pin 23; the sprue ejector pin 23 is provided with a fork-shaped needle head 232 that is sealed and fits with the gap at the sprue joint, and the diameter of the sprue ejector pin 23 is larger than the diameter of the sprue flow channel 18. This structure can synchronously eject the sprue waste immediately when the mold is opened, and ensure that the sprue ejector pin 23 is pushed back to its original position by the template when the mold is locked.

[0030] Preferably, when the mold is opened, the gas introduced into the driving gas circuit 24 when the mold is opened synchronously is a high-pressure gas of 3-9 MPA, and the driving gas circuit 24 is closed synchronously when the mold is locked.

[0031] Specifically, the initial position of the pressure piston 231 is the first driving chamber 221. When the mold is opened, 3-9MP high-pressure gas is introduced into the driving air circuit 24. The pressure piston 231 moves from the first driving chamber 221 to the second driving chamber 222 under the action of the high-pressure gas. The nozzle ejector pin 23 extends out of the ejector hole 21 under the drive of the pressure piston 231, and ejects the nozzle waste from the nozzle flow channel 18 and the nozzle 17 to the transmission belt for recycling the nozzle waste. The whole process from mold opening to ejection takes only 1-2 seconds, which greatly shortens the injection cycle. When the pressure piston 231 moves to the connection between the second driving chamber 222 and the first ejector hole 211, the pressure piston 231 abuts against the first ejector hole 211 to stop moving, and the portion of the nozzle ejector pin 23 extending out of the ejector hole 21 reaches the maximum length, and at the same time, the driving air circuit 24 is closed.

[0032] More specifically, when the mold is locked, the ejector pin 23 of the sprue contacts the template and returns to its original position along the ejector hole 21 under the reverse thrust, that is, the pressurized piston 231 returns to the initial position of the first driving cavity 221, preparing for the next mold opening. In the process of repeated injection molding of the mold, the robot clamping device is eliminated, which reduces costs and improves production efficiency.

[0033] The working principle of this embodiment is as follows:

[0034] The present invention comprises an upper mold assembly 1, wherein the upper mold assembly 1 comprises an upper mold frame 11, a fixing plate 12, an upper mold plate 13, and a stripper plate 14 which are arranged in sequence. The stripper plate 14 is provided with a stripper pin 15 and a mold core 16. The mold core 16 is provided with a nozzle 17 and a sprue flow channel 18 connected to the nozzle 17. The upper mold assembly 1 is provided with a sprue ejection assembly 2 which automatically ejects sprue waste when the mold is opened. The sprue ejection assembly 2 comprises an ejector pin hole 21 which is arranged in the upper mold assembly 1 and communicates with the sprue flow channel 18, and a pneumatic drive chamber 22 which is communicated with the ejector pin hole 21. The ejector pin hole 21 is provided with a sprue ejector pin. The ejector pin 23 is provided on the upper mold assembly 1 with a driving air circuit 24 connected to the pneumatic driving chamber 22, and the sprue ejector assembly 2 is provided with at least two groups; when the mold is opened, the driving air circuit 24 is opened synchronously to connect the high-pressure gas, and the high-pressure gas enters the pneumatic driving chamber 22, pushing the sprue ejector pin 23 to move outward in the ejector hole 21, and while the ejector pin 15 is ejecting the product, the sprue waste is ejected from the sprue flow channel 18 and the nozzle 17 to the conveyor line of the recycling sprue, and when the injection molding is performed again, the sprue ejector pin 23 returns to the initial position along the ejector hole 21 under the reverse push of the template, and the cycle repeats. In summary, compared with the prior art, the utility model can reduce the risk of mold compression molding, shorten the injection molding cycle, reduce peripheral auxiliary equipment, thereby improving the production PPH value, reducing equipment maintenance costs, improving the stability of the injection molding process and improving product quality, and ultimately achieving cost reduction and efficiency improvement in the entire production process.

Claims

1. An injection molding automatic ejector mold, comprising an upper mold assembly (1), wherein the upper mold assembly (1) comprises an upper mold frame (11), a fixing plate (12), an upper mold plate (13), and a stripper plate (14) arranged in sequence, wherein the stripper plate (14) is provided with a stripper ejector pin (15) and a mold core (16), and the mold core (16) is provided with a nozzle (17) and a nozzle flow channel (18) connected to the nozzle (17), characterized in that: The upper mold assembly (1) is provided with a nozzle ejection assembly (2) for automatically ejecting nozzle waste when the mold is opened. The nozzle ejection assembly (2) comprises an ejector hole (21) arranged in the upper mold assembly (1) and communicating with the nozzle flow channel (18) and an air pressure drive chamber (22) communicated with the ejector hole (21). A nozzle ejection ejector (23) is installed in the ejector hole (21). The upper mold assembly (1) is provided with a drive air path (24) communicated with the air pressure drive chamber (22).

2. The automatic ejector mold for injection molding according to claim 1, characterized in that: The pneumatic drive chamber (22) comprises in sequence a first drive chamber (221) located on the fixed plate (12) and a second drive chamber (222) provided on the upper mold plate (13); the first drive chamber (221) and the second drive chamber (222) are connected to and correspond to each other.

3. The automatic ejector mold for injection molding according to claim 2, characterized in that: The ejector hole (21) comprises a first ejector hole (211) provided on the upper mold plate (13), a second ejector hole (212) provided on the stripper plate (14), and a third ejector hole (213) provided on the mold core (16); the first ejector hole (211), the second ejector hole (212), and the third ejector hole (213) are sequentially connected and correspond one to one.

4. The automatic ejector mold for injection molding according to claim 3, characterized in that: The first ejector pin hole (211) is connected to the second driving cavity (222), and the diameter of the first ejector pin hole (211) is smaller than that of the second driving cavity (222).

5. The automatic ejector mold for injection molding according to claim 4, characterized in that: A pressure-bearing piston (231) corresponding to the air pressure drive chamber (22) is provided at one end of the water outlet ejector pin (23), and a high-temperature sealing ring (233) tightly fitting with the air pressure drive chamber (22) is provided on the pressure-bearing piston (231).

6. The automatic ejector nozzle mold for injection molding according to claim 5, characterized in that: The nozzle ejector pin (23) is provided with a fork-shaped needle head (232) which is sealed and fitted with the gap at the nozzle joint, and the diameter of the nozzle ejector pin (23) is larger than the diameter of the nozzle flow channel (18).

7. The automatic ejector nozzle mold for injection molding according to claim 1, characterized in that: The stripping ejector pin (15) and the nozzle ejector pin (23) are both multiple and distributed on the nozzle flow channel (18).

8. The automatic ejector nozzle mold for injection molding according to claim 1, characterized in that: The inner wall of the air pressure drive chamber (22) is a mirror-finished surface.

9. The automatic ejector nozzle mold for injection molding according to claim 1, characterized in that: At least two groups of the water outlet ejection components (2) are provided.

10. The automatic ejector nozzle mold for injection molding according to claim 1, characterized in that: The gas introduced into the driving gas circuit (24) when the mold is opened synchronously is a high-pressure gas of 3-9 MPA.

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