Multifunctional injection molding machine

Abstract

The invention relates to the technical field of injection molding machining, in particular to a multifunctional injection molding machine which comprises a base, an injection molding device is fixedly installed on one side of the upper end of the base, the output end of the injection molding device communicates with a heating device, and the output end of the heating device is connected with a second mold. A first mold matched with the second mold is arranged on one side of the second mold, and the air compression assembly is installed on the base; and one end of the air outlet pipe communicates with the interior of the first mold, the other end of the air outlet pipe is connected with a surrounding pipe, and the end, away from the air outlet pipe, of the surrounding pipe communicates with the feeding pipe after being spirally wound around the injection molding device and the heating device. On one hand, high-pressure gas in the pressurizing process can be utilized, so that the high-pressure gas drives plastic particles to move, automatic filling and preheating are conveniently conducted on the plastic particles, and on the other hand, the high-pressure gas can be sprayed out while products are demoulded, the products are assisted in demoulding, and the products are prevented from being damaged.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, in particular to a multifunctional injection molding machine. Background Art

[0002] Injection molding machine, also known as injection molding machine or injection machine, is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting plastics. In the process of processing products, the injection molding machine needs to heat the raw materials to melt them, then introduce the molten liquid raw materials into the mold for cooling and molding, and finally demolding.

[0003] However, in the prior art, when heating and melting the raw materials, the plastic particles are often directly put into the heating device to melt them, and there is a lack of preheating process. On the one hand, if the plastic particles are heated in the heating device for too long or at too high a temperature, thermal degradation may occur, resulting in a decrease in the performance of the plastic. On the other hand, the heating time required for the plastic particles that have not been preheated to be put into the heating device becomes longer, which increases the overall working time of the device. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned shortcomings in the prior art and to propose a multifunctional injection molding machine.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A multifunctional injection molding machine comprises a base, an injection molding device is fixedly mounted on one side of the upper end of the base, an input end of the injection molding device is connected to a feeding pipe, an output end of the injection molding device is connected to a heating device, an output end of the heating device is connected to a second mold, a first mold matching the second mold is arranged on one side of the second mold, and further comprises:

[0007] An air compression assembly, the air compression assembly is mounted on the base, and an output end of the air compression assembly is communicated with the interior of the first mold;

[0008] An air outlet pipe, wherein a pressure valve is installed on the air outlet pipe, one end of the air outlet pipe is connected to the interior of the first mold, and the other end is connected to a surrounding pipe, and the end of the surrounding pipe away from the air outlet pipe is connected to the feeding pipe after being spirally wound around the injection molding device and the heating device;

[0009] A material storage barrel, which is fixedly mounted on the upper end of the base, and whose output end is connected to a material suction pipe, and whose end away from the material storage barrel is connected to an air outlet pipe;

[0010] The demoulding mechanism is installed on the other side of the upper end of the base, and its working end is connected to the first mold.

[0011] Preferably, a mounting plate fixedly mounted on the upper surface of the base is provided on one side of the output end of the heating device, a through groove is provided on the mounting plate, and the second mold is fixedly mounted on the side surface of the mounting plate away from the heating device, and the output end of the heating device is connected to the injection port of the second mold after passing through the through groove.

[0012] Preferably, the first mold and the second mold are both provided with liquid cooling interfaces, and the liquid cooling interfaces are connected to an external liquid cooling circulation system.

[0013] Preferably, the air compression assembly comprises a first air compressor fixedly mounted on a base, an output end of the first air compressor is connected to a first air inlet pipe, and an end of the first air inlet pipe away from the first air compressor is connected to the interior of the first mold.

[0014] Preferably, the storage barrel contains plastic particles to be melted.

[0015] Preferably, a section where the air outlet pipe is connected to the material suction pipe is narrow in the middle and wide at both ends.

[0016] Preferably, the demoulding mechanism includes a fixed plate fixedly mounted on the other side of the upper end of the base, two groups of hydraulic push rods are fixedly mounted on the side of the fixed plate close to the first mold, the output ends of the hydraulic push rods are fixedly connected to the first mold, and an ejection assembly is also provided on the side of the fixed plate close to the first mold.

[0017] Preferably, the ejection assembly includes a hollow tube fixedly mounted on the fixed plate, an extrusion plate is fixedly mounted on one end of the hollow tube away from the fixed plate, a plurality of mounting blocks are fixedly mounted on one end of the extrusion plate away from the fixed plate, an end of the mounting block away from the extrusion plate is fixedly connected to an air guide pipe, the air guide pipe is connected to the hollow tube through the mounting block and the extrusion plate, an end of the air guide pipe close to the first mold is connected to a hollow ejector pin, and the first mold is provided with insertion grooves corresponding to the positions of the hollow ejector pins.

[0018] Preferably, a second air compressor is fixedly mounted on the base, an output end of the second air compressor is connected to a second air inlet pipe, an end of the second air inlet pipe away from the second air compressor is connected to the interior of the hollow tube, and a plurality of air outlet holes are evenly distributed on the hollow ejector pin.

[0019] Preferably, a sliding seat is slidably sleeved on the air guide tube, and a spring sleeved on the outside of the air guide tube is provided between the sliding seat and the mounting block.

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] 1. In the present application, by setting the air outlet pipe, the suction pipe and the surrounding pipe, the high-speed gas entering the air outlet pipe from the pressure valve can be sucked into the suction pipe when passing through the suction pipe. Since the plastic particles are relatively light, the plastic particles will enter the surrounding pipe with the air flow for drying and preheating. On the one hand, the moisture in the plastic particles can be removed to improve the quality of the products. On the other hand, the heating time of the plastic particles in the injection molding device can be shortened, the risk of thermal degradation can be reduced, and the performance of the products can be ensured.

[0022] 2. In the present application, by configuring the second air compressor, the hollow tube, the air guide tube and the hollow ejector pin, when demolding is performed after the injection molding is completed, the compressed gas ejected from the air outlet at the front end of the hollow ejector pin assists in ejecting the product, thereby avoiding the product surface being damaged or squeezed by the ejector pin alone. The compressed gas ejected from the air outlet at the side of the hollow ejector pin can cool and remove dust from the cavity of the first mold, thereby ensuring production efficiency and product quality. The air outlet at the front end can also cool and blow the cavity of the second mold after ejecting the product, thereby ensuring production efficiency and product quality.

[0023] In summary, through the setting of the above-mentioned structure, the present application can, on the one hand, utilize the high-pressure gas in the pressurization process, so as to drive the plastic particles to move, thereby facilitating their automatic filling and preheating; on the other hand, it can also spray high-pressure gas while the product is being demolded, to assist the product in demolding and avoid damage to the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The present invention is a schematic diagram of the overall axonometric structure of a multifunctional injection molding machine.

[0025] Figure 2 The present invention provides a schematic structural diagram of a heating device and an injection molding device of a multifunctional injection molding machine.

[0026] Figure 3 This is a schematic structural diagram of a first mold and a second mold of a multifunctional injection molding machine proposed by the present invention.

[0027] Figure 4 The present invention is a schematic diagram of a fixed plate and a hydraulic push rod structure of a multifunctional injection molding machine.

[0028] Figure 5 The present invention is a schematic diagram of the structure of a suction pipe and a surrounding pipe of a multifunctional injection molding machine.

[0029] Figure 6 This is a schematic diagram of the air guide pipe and hollow ejector structure of a multifunctional injection molding machine proposed by the present invention.

[0030] In the figure: 1 base, 2 fixing plate, 3 storage barrel, 4 first mold, 5 second mold, 6 mounting plate, 7 injection molding device, 8 feeding pipe, 9 heating device, 10 first air compressor, 11 first air inlet pipe, 12 second air compressor, 13 second air inlet pipe, 14 hydraulic push rod, 15 extrusion plate, 16 hollow pipe, 17 mounting block, 18 air guide pipe, 19 spring, 20 hollow ejector pin, 21 air outlet, 22 liquid cooling interface, 23 pressure valve, 24 air outlet pipe, 25 suction pipe, 26 surrounding pipe. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely 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, rather than all the embodiments.

[0032] Reference Figures 1 to 6 A multifunctional injection molding machine comprises a base 1, an injection molding device 7 is fixedly installed on one side of the upper end of the base 1, a feeding pipe 8 is connected to the input end of the injection molding device 7, and a heating device 9 is connected to the output end of the injection molding device 7. The injection molding device 7 and the heating device 9 are both prior arts and are not the invention of the present application, so the specific structural designs of the two are not repeated here. A mounting plate 6 fixedly installed on the upper end surface of the base 1 is provided on one side of the output end of the heating device 9, a through groove is provided on the mounting plate 6, and a second mold 5 is fixedly installed on the surface of the mounting plate 6 away from the heating device 9. The output end of the heating device 9 is connected with the injection port of the second mold 5 after passing through the through groove, and a first mold 4 matching with it is provided on one side of the second mold 5, a fixing plate 2 is fixedly installed on the other side of the upper end of the base 1, and two groups of hydraulic push rods 14 are fixedly installed on the side of the fixing plate 2 close to the first mold 4, and the output end of the hydraulic push rod 14 is fixedly connected to the first mold 4.

[0033] The first mold 4 and the second mold 5 are both equipped with a liquid cooling interface 22, which is connected to an external liquid cooling circulation system, so that the injection molded parts between the first mold 4 and the second mold 5 can be liquid-cooled under the action of the external liquid cooling circulation system. A first air compressor 10 is fixedly installed on the base 1, and the output end of the first air compressor 10 is connected to a first air inlet pipe 11, and the end of the first air inlet pipe 11 away from the first air compressor 10 is connected to the interior of the first mold 4. An outlet pipe 24 connected to the interior of the first mold 4 is provided on one side of the first mold 4, and a pressure valve 23 is installed on the outlet pipe 24. The end of the outlet pipe 24 away from the first mold 4 is connected to a surrounding pipe 26, and the end of the surrounding pipe 26 away from the outlet pipe 24 is connected to the feeding pipe 8 after being spirally wound around the injection molding device 7 and the heating device 9.

[0034] A storage barrel 3 is fixedly installed on the upper end of the base 1, and plastic particles to be melted are stored in the storage barrel 3. The output end of the storage barrel 3 is connected to a suction pipe 25, and the end of the suction pipe 25 away from the storage barrel 3 is connected to the air outlet pipe 24. Based on Bernoulli's theorem, the suction force generated at the suction pipe 25 is very large, so the plastic particles in the storage barrel 3 can be sucked into the suction pipe 25. In order to speed up the flow rate of the gas inside the air outlet pipe 24, the section where the air outlet pipe 24 connects the suction pipe 25 is narrow in the middle and wide at both ends. Based on the Venturi effect, the gas passing through here will be accelerated twice to ensure that the gas flow rate is large enough to generate sufficient suction and kinetic energy.

[0035] A hollow tube 16 is fixedly installed on one side of the fixed plate 2 close to the first mold 4, a second air compressor 12 is fixedly installed on the base 1, an output end of the second air compressor 12 is connected to a second air inlet pipe 13, an end of the second air inlet pipe 13 away from the second air compressor 12 is communicated with the inside of the hollow tube 16, an end of the hollow tube 16 away from the fixed plate 2 is fixedly installed with an extrusion plate 15, an end of the extrusion plate 15 away from the fixed plate 2 is fixedly installed with a plurality of mounting blocks 17, and the mounting blocks 17 are away from the extrusion plate 15. One end is fixedly connected with an air guide tube 18, which is connected with the hollow tube 16 through the mounting block 17 and the extrusion plate 15. A sliding seat is slidably sleeved on the air guide tube 18, and a spring 19 is sleeved on the outside of the air guide tube 18 between the sliding seat and the mounting block 17. One end of the air guide tube 18 close to the first mold 4 is connected with a hollow ejector pin 20, and a plurality of air outlet holes 21 are evenly distributed on the hollow ejector pin 20. The first mold 4 is provided with insertion grooves corresponding to the positions of the hollow ejector pins 20.

[0036] The specific working principle of the present invention is as follows: add the plastic particles to be melted into the storage barrel 3, connect the external liquid cooling circulation system to the first mold 4 and the second mold 5 through the liquid cooling interface 22 to ensure that the liquid cooling can operate normally, connect the first air inlet pipe 11 to the first mold 4, adjust the threshold of the pressure valve 23, and ensure that the first air compressor 10 can pressurize the inside of the first mold 4; connect the second air inlet pipe 13 to the hollow tube 16, start the second air compressor 12 to ensure that the compressed air can pass through the hollow tube 16 and the air guide tube 18 into the hollow ejector pin 20, and finally spray out from the air outlet 21.

[0037] After the preparation work is completed, the plastic particles enter the injection molding device 7 from the feeding pipe 8, and the heating device 9 is started to melt the plastic particles. Before injection molding, the first air compressor 10 is started, and the pressure valve 23 is used to keep the cavity between the first mold 4 and the second mold 5 in a high pressure state, and the excess gas is ejected from the outlet pipe 24. This has the following advantages.

[0038] First: Before the melt is injected, the first mold 4 and the second mold 5 are pressurized with compressed air to maintain the air pressure value in the cavity. During the injection molding process, the compressed gas presses the molten plastic to the cavity wall to prevent the growth of the gas core in the plastic melt due to the reduction of air pressure at the front of the material flow, thereby ensuring the stability of the part size and reducing injection defects such as dents, warping, shrinkage and confluence lines.

[0039] Second: When the high-speed gas entering the outlet pipe 24 from the pressure valve 23 passes through the suction pipe 25, due to Bernoulli's theorem, the suction force generated at the suction pipe 25 is very large, sucking the plastic particles in the storage barrel 3 into the suction pipe 25. Since the weight of the plastic particles is relatively light, the plastic particles will enter the surrounding pipe 26 with the air flow for drying and preheating. In addition, because the diameter of the outlet pipe 24 connected to the suction pipe 25 has a transition design from wide to narrow and then to wide, due to the Venturi effect, the gas passing through here will be accelerated twice, ensuring that the gas flow rate is large enough to generate sufficient suction and kinetic energy.

[0040] The surrounding tube 26 will be contact-wound in the gap between the injection molding device 7 and the heating device 9, and the high temperature generated by the heating device 9 is utilized to dry and preheat the plastic particles in the surrounding tube 26 through heat conduction and the high-speed airflow in the surrounding tube 26. This has the following advantages.

[0041] First, plastic particles may absorb moisture from the air during storage and transportation. If this moisture is not removed in time, it will cause defects such as bubbles, silver threads, blur, and poor air permeability in the products during the injection molding process. High-speed airflow can quickly remove moisture from the surface and internal pores of plastic particles, while increasing the temperature can reduce the binding force between water molecules and polymer chains, making the moisture more volatilized. The combination of the two can more thoroughly remove moisture from plastic particles and improve the quality of products.

[0042] Second: The temperature of the preheated plastic particles increases, and after entering the barrel of the injection molding machine, the heat required to be absorbed is reduced, thereby reducing the energy consumption of the injection molding machine. Compared with plastic particles that have not been preheated, the preheated plastic can reach a molten state faster, reducing heating time and energy consumption.

[0043] Third: If the plastic particles are heated in the heating device 9 for too long or at too high a temperature, thermal degradation may occur, resulting in a decrease in the performance of the plastic. By preheating in advance, the heating time of the plastic in the injection molding device 7 can be shortened, the risk of thermal degradation can be reduced, and the performance of the product can be guaranteed.

[0044] Fourthly, the plastic particles preheated from the surrounding tube 26 directly enter the injection molding device 7 through the feeding tube 8, thus realizing the automation of feeding.

[0045] The injection molding device 7 injects the molten plastic into the mold cavity and starts liquid cooling for cooling. After a product is completed, the hydraulic push rod 14 is started to pull the first mold 4 back to expose the product. During the pulling back process, the distance between the extrusion plate 15 and the first mold 4 becomes smaller, and the compression spring 19 begins. At the same time, the second air compressor 12 is started, and the compressed gas is ejected from the hollow ejector pin 20. This has the following advantages.

[0046] First, the hollow ejector 20 is ejected after the product is exposed to prevent the product from being pushed onto the second mold 5 to cause squeezing.

[0047] Second, the compressed gas ejected from the air outlet 21 at the front end of the hollow ejector 20 assists in ejecting the product, thereby preventing the ejector from damaging or squeezing the product surface.

[0048] Third: the air outlet 21 on the side of the hollow ejector 20 sprays compressed gas to cool down and remove dust from the cavity of the first mold 4 to ensure production efficiency and product quality.

[0049] Fourthly, the air outlet 21 at the front end can also cool down and blow air to the cavity of the second mold 5 after the product is ejected, thereby ensuring production efficiency and product quality.

[0050] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multifunctional injection molding machine, comprising a base (1), an injection molding device (7) is fixedly mounted on one side of the upper end of the base (1), an input end of the injection molding device (7) is connected to a feeding pipe (8), an output end of the injection molding device (7) is connected to a heating device (9), an output end of the heating device (9) is connected to a second mold (5), and a first mold (4) matching the second mold (5) is arranged on one side of the second mold (5), characterized in that: Also included are: An air compression component, the air compression component is mounted on the base (1), and an output end of the air compression component is connected to the interior of the first mold (4); an air outlet pipe (24), wherein a pressure valve (23) is installed on the air outlet pipe (24), one end of the air outlet pipe (24) is connected to the interior of the first mold (4), and the other end is connected to a surrounding pipe (26), and the end of the surrounding pipe (26) away from the air outlet pipe (24) is connected to the feeding pipe (8) after being spirally wound around the injection molding device (7) and the heating device (9); A material storage barrel (3), wherein the material storage barrel (3) is fixedly mounted on the upper end of the base (1), and an output end thereof is connected to a material suction pipe (25), and an end of the material suction pipe (25) away from the material storage barrel (3) is connected to an air outlet pipe (24); A demoulding mechanism is installed on the other side of the upper end of the base (1), and a working end of the demoulding mechanism is connected to the first mold (4).

2. The multifunctional injection molding machine according to claim 1, characterized in that: A mounting plate (6) fixedly mounted on the upper surface of the base (1) is provided on one side of the output end of the heating device (9); a through slot is provided on the mounting plate (6); the second mold (5) is fixedly mounted on a side surface of the mounting plate (6) away from the heating device (9); the output end of the heating device (9) is connected to the injection port of the second mold (5) after passing through the through slot.

3. The multifunctional injection molding machine according to claim 1, characterized in that: The first mold (4) and the second mold (5) are both provided with a liquid cooling interface (22), and the liquid cooling interface (22) is connected to an external liquid cooling circulation system.

4. The multifunctional injection molding machine according to claim 1, characterized in that: The air compression assembly comprises a first air compressor (10) fixedly mounted on a base (1); an output end of the first air compressor (10) is connected to a first air inlet pipe (11); an end of the first air inlet pipe (11) away from the first air compressor (10) is connected to the interior of the first mold (4).

5. The multifunctional injection molding machine according to claim 1, characterized in that: The storage barrel (3) stores plastic particles ready to be melted.

6. The multifunctional injection molding machine according to claim 1, characterized in that: The section where the air outlet pipe (24) is connected to the material suction pipe (25) is narrow in the middle and wide at both ends.

7. The multifunctional injection molding machine according to claim 1, characterized in that: The demoulding mechanism comprises a fixed plate (2) fixedly mounted on the other side of the upper end of the base (1); two groups of hydraulic push rods (14) are fixedly mounted on the side of the fixed plate (2) close to the first mold (4); the output ends of the hydraulic push rods (14) are fixedly connected to the first mold (4); and an ejection assembly is also provided on the side of the fixed plate (2) close to the first mold (4).

8. The multifunctional injection molding machine according to claim 7, characterized in that: The ejection assembly comprises a hollow tube (16) fixedly mounted on a fixed plate (2); an extrusion plate (15) is fixedly mounted on one end of the hollow tube (16) away from the fixed plate (2); a plurality of mounting blocks (17) are fixedly mounted on one end of the extrusion plate (15) away from the fixed plate (2); an air guide tube (18) is fixedly connected to one end of the mounting block (17) away from the extrusion plate (15); the air guide tube (18) is connected to the hollow tube (16) through the mounting block (17) and the extrusion plate (15); a hollow ejector pin (20) is connected to one end of the air guide tube (18) close to the first mold (4); and an insertion groove corresponding to the position of each hollow ejector pin (20) is provided on the first mold (4).

9. The multifunctional injection molding machine according to claim 8, characterized in that: A second air compressor (12) is fixedly mounted on the base (1); an output end of the second air compressor (12) is connected to a second air inlet pipe (13); an end of the second air inlet pipe (13) away from the second air compressor (12) is in communication with the interior of the hollow tube (16); and a plurality of air outlet holes (21) are evenly distributed on the hollow ejector pin (20).

10. The multifunctional injection molding machine according to claim 9, characterized in that: A sliding seat is slidably sleeved on the air guide tube (18), and a spring (19) sleeved on the outside of the air guide tube (18) is arranged between the sliding seat and the mounting block (17).

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