Injection mold capable of automatically discharging

Abstract

The invention relates to the field of molds, and particularly discloses an automatic discharging injection mold which comprises a fixed mold, a movable mold, a limiting mechanism, an ejector pin mechanism and a guide mechanism. Through the exquisite design, the fixed mold and the movable mold are precisely butted through the guide mechanism to form a complete forming cavity. And after injection molding is completed, the ejector pin mechanism can automatically push the product out of the mold, automatic discharging is achieved, and the production efficiency is greatly improved.

Description

Technical Field

[0001] The present application relates to the field of molds, and in particular to an injection mold capable of automatically discharging materials. Background Art

[0002] At present, molds are important tools in industrial production, especially in the production process of plastic products, injection molds play a key role. With the advancement of technology and the increase in demand for industrial production, higher requirements are also placed on the efficiency and automation of injection molds.

[0003] In the related art, an injection mold demoulding mechanism is disclosed. By equipping a clamping device, when the molds in the upper mold base and the lower mold base need to be demoulded, the control piston rod will drive the lower mold base to move downward. When the lower mold base moves to a certain distance, it will push the pressing plate to apply pressure to the slide plate, causing the slide to pull the hinge rod. This action in turn drives the sliding block and the sliding rod to slide downward, so that the two sets of clamping plates can clamp the mold in the lower mold base. As the lower mold base continues to move downward, the formed mold can be separated from the lower mold base.

[0004] The above-mentioned related technologies have the following defects: the operation of the above-mentioned demoulding mechanism requires the coordinated cooperation of the driving device and the control system to drive the clamping plate to release the product from the mold, and the manufacturing cost of the demoulding mechanism is high. Summary of the invention

[0005] In order to reduce the cost of the demoulding mechanism, the present application provides an injection mold capable of automatically discharging materials.

[0006] The present application provides an injection mold capable of automatically discharging materials, which adopts the following technical solution: An injection mold capable of automatically discharging materials, an injection mold capable of automatically discharging materials, comprising a fixed mold, a movable mold, a limiting mechanism, an ejector mechanism and a guide mechanism, wherein the guide mechanism comprises a guide shaft; The fixed mold is mounted on the first end of the guide shaft, and the movable mold is slidably connected to the second end of the guide shaft in the length direction of the guide shaft; The fixed mold has a first molding cavity at one end facing the movable mold, and the movable mold has a second molding cavity at one end facing the fixed mold; The limiting mechanism is used to limit the product in the second molding cavity; The ejector mechanism comprises an ejector plate, an ejector pin, a pressing rod and a first return spring, wherein the ejector plate is arranged on a side of the movable mold away from the fixed mold; The ejector pin, the pressing rod and the first return spring are all arranged along the length direction of the guide shaft and are all located between the ejector plate and the fixed mold; In the length direction of the guide shaft, the ejector pin and the pressing rod are both slidably connected to the movable mold; The first end of the ejector pin is connected to the ejector plate, and the second end is located in the second molding cavity; The first end of the pressing rod is connected to the top plate, and the second end is used to abut against the fixed mold; The first end of the first return spring is connected to the top plate, and the second end is connected to the movable mold.

[0007] By adopting the above technical solution, when the fixed mold and the movable mold are separated, the first return spring is in a state of being free of force, and the second end of the ejector pin and the second end of the pressure rod are both located between the fixed mold and the movable mold. During the process of the fixed mold and the movable mold being molded together, the second end of the pressure rod abuts against the fixed mold, and the fixed mold pushes the pressure rod in the direction of the movable mold. When the fixed mold and the movable mold are just molded together, the second end of the ejector pin is also just coplanar with the inner wall of the second molding cavity, and the first return spring is in a stretched state. Then, hot-melt raw materials are injected between the first molding cavity and the second molding cavity. After the hot-melt raw materials are cooled and formed into products, the movable mold is away from the fixed mold, and the limiting mechanism can limit the product in the second molding cavity, so that the product can be located in the movable mold after the mold is opened. After the movable mold is separated from the fixed mold, the limiting mechanism releases the limit on the product. The first return spring starts to reset and drives the ejector pin to move in the direction of the fixed mold, so that the product is separated from the movable mold, and the product is automatically demolded. In the present application, through the coordinated cooperation between the ejector plate, the ejector pin, the pressure rod and the first return spring, when the mold is opened, the first return spring can drive the ejector pin to eject the product out of the mold through its own elastic force. No additional drive device and control system are required to drive the ejector pin to operate. While ensuring automatic discharge of the product, the cost of the demolding mechanism is reduced.

[0008] Optionally, the fixed mold includes a first mold base, a first box body and a first mold body, the first mold base is provided with a first guide hole, the first end of the guide shaft is provided in the first guide hole and is connected to the first mold base; The movable mold comprises a second mold base, a second box body and a second mold body, the second mold base is provided with a second guide hole, and the second end of the guide shaft is arranged in the second guide hole; The first box body and the second box body are both arranged between the first mold base and the second mold base, and the box opening of the first box body and the box opening of the second box body are arranged opposite to each other, and the box bottom of the first box body is connected to the first mold base, and the box bottom of the second box body is connected to the second mold base; The first mold body is installed in the first box body, and a first heat insulation layer is connected between the first mold body and the first box body, and the first molding cavity is provided at one end of the first mold body away from the first box body; The second mold body is installed in the second box body, and a second heat insulation layer is connected between the second mold body and the second box body, and the second molding cavity is provided at one end of the second mold body away from the second box body; The second end of the pressing rod is used to abut against the first box body on the side of the first heat insulation layer.

[0009] By adopting the above technical solution, the first mold body and the second mold body are used to form the product. The first heat insulation layer is used to prevent the heat on the first mold body from being easily transferred to the first box body, and the second heat insulation layer is used to prevent the heat on the second mold body from being easily transferred to the second box body. In addition, the first return spring can be prevented from being heated, which is conducive to the long-term and stable operation of the first return spring.

[0010] Optionally, the second mold base is provided with a first middle vertical hole, the second box body is provided with a second middle vertical hole coaxial with the first middle vertical hole, the second heat insulation layer is provided with a third middle vertical hole coaxial with the second middle vertical hole, and the second mold body is provided with a fourth middle vertical hole coaxial with the third middle vertical hole; The first middle vertical hole is arranged along the length direction of the guide shaft, and the ejector pin is located in the first middle vertical hole, the second middle vertical hole, the third middle vertical hole and the fourth middle vertical hole.

[0011] By adopting the above technical solution, the ejector pin is slidably connected to the movable mold through the first middle vertical hole, the second middle vertical hole, the third middle vertical hole and the fourth middle vertical hole.

[0012] Optionally, the ejector pin is dynamically sealed to the second mold body.

[0013] By adopting the above technical solution, the hot-melt raw material is not easy to enter the gap between the ejector pin and the second mold body.

[0014] Optionally, a first side vertical hole is provided on the second mold base, and a second side vertical hole coaxial with the first side vertical hole is provided on the second box body; The first side vertical hole is arranged along the length direction of the guide shaft, and the pressing rod is located in the first side vertical hole and the second side vertical hole.

[0015] By adopting the above technical solution, the pressing rod is slidably connected to the movable mold through the first side vertical hole and the second side vertical hole.

[0016] Optionally, the first return spring is sleeved on the pressure rod and / or the ejector pin.

[0017] By adopting the above technical solution, the pressure rod and / or the ejector pin are used to guide the extension and retraction of the first return spring.

[0018] Optionally, the ejector mechanism further includes an arched bracket and a telescopic member, wherein the arched bracket is mounted on an end of the movable mold away from the fixed mold; The telescopic member is arranged on a side of the top plate away from the fixed mold and is arranged along the length direction of the guide shaft, with one end connected to the arch support and the other end being used for telescoping toward the top plate.

[0019] By adopting the above technical solution, the arch bracket is connected to the telescopic device, and the telescopic device drives the arch bracket to move, thereby moving the movable mold closer to or away from the fixed mold. With the long-term use of the first return spring, the elasticity of the first return spring will inevitably deteriorate. At this time, if the product needs to be demoulded, the return elastic force of the first return spring is insufficient, and the telescopic member can extend to push the ejector plate, thereby causing the ejector pin to eject the product from the movable mold.

[0020] Optionally, the limiting mechanism includes a side rod, a side spring, a side connecting seat, a side ball and a side inclined plate, the side wall of the second box body is provided with a first side hole, the first side hole is radially arranged on the side of the guide shaft, the second heat insulation layer is provided with a second side hole coaxial with the first side hole, and the second mold body is provided with a third side hole coaxial with the second side hole; The side rod is coaxially arranged in the first side hole, the second side hole and the third side hole; The side connecting seat is arranged on the side of the second box body and is connected to the first end of the side rod; The side spring is sleeved on the side rod, and one end of the side spring is connected to the second box body, and the other end is connected to the side connecting seat; The side ball bearing is rotatably mounted on an end of the side connecting seat away from the side rod; The side inclined plate is arranged opposite to the side ball, and one end is installed on the side of the first box body, and the other end is arranged on the side of the first box body away from the first mold base, and in the direction from the first mold base to the second mold base, the distance between the side inclined plate and the first box body and the second box body increases.

[0021] By adopting the above technical solution, during the mold closing process, the movable mold moves toward the fixed mold, the side balls will enter between the side inclined plate and the second box body, and the side balls will roll downward on the side inclined plate. When the side balls roll on the side inclined plate, they will gradually approach the second box body, the side springs will gradually be compressed, and the side rods will gradually extend into the second molding cavity. After the mold closing is completed, the end of the side rod away from the balls just extends into the second molding cavity, so that when the product is molded, the side rod can be inserted into the product, and when the mold is opened, the side rod can hook the product so that the product stays in the second molding cavity. During the mold opening process, under the action of the resetting elastic force of the side springs, the side balls roll upward on the side inclined plates, and the side rods gradually move away from the second molding cavity until they are separated from the product. At this time, the limiting mechanism releases the limit on the product, so that the product can be ejected out of the movable mold by the ejector pin.

[0022] Optionally, the guide mechanism further includes a second return spring and a limiter, wherein the limiter is disposed on a side of the movable mold away from the fixed mold and connected to the guide shaft; The second return spring is sleeved on the guide shaft, and one end of the second return spring is connected to the limiter, and the other end is connected to the movable mold.

[0023] By adopting the above technical solution, when closing the mold, the telescopic device is used to push the movable mold toward the fixed mold, and the second return spring is stretched. When opening the mold, the telescopic device is moved away from the movable mold. Under the return elastic force of the second return spring, the movable mold can automatically move away from the fixed mold. At the same time, after the movable mold moves away from the fixed mold, the limit of the side spring and the first return spring will also be released. Under the return elastic force of the side spring, the side rod can move away from the second molding cavity to release the limit of the product. Under the action of the first return spring, the ejector pin can push the product out of the movable mold, and then after the product is formed between the first molding cavity and the second molding cavity, it is only necessary to release the limit of the movable mold. Under the coordinated action of the side spring, the first return spring and the second return spring, the movable mold and the fixed mold can be automatically opened and the product can be automatically demolded without the help of an additional driving device, so that the demolding of the product is convenient and quick.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. In the present application, through the coordinated cooperation among the ejector plate, the ejector pin, the pressure rod and the first return spring, when the mold is opened, the first return spring can drive the ejector pin to eject the product out of the mold through its own elastic force. No additional driving device and control system are required to drive the ejector pin to operate. While ensuring automatic discharge of the product, the cost of the demolding mechanism is reduced.

[0025] 2. In the present application, the first heat insulation layer is used to prevent the heat on the first mold body from being easily transferred to the first box body, and the second heat insulation layer is used to prevent the heat on the second mold body from being easily transferred to the second box body. This can prevent the side spring, the first return spring and the second return spring from being easily heated, which is beneficial to the long-term and stable operation of the side spring, the first return spring and the second return spring.

[0026] 3. In the present application, during the mold closing process, the movable mold moves toward the fixed mold, the side balls will enter between the side inclined plate and the second box body, and the side balls will roll downward on the side inclined plate. When the balls roll on the side inclined plate, they will gradually approach the second box body, the side springs will gradually be compressed, and the side rods will gradually extend into the second molding cavity. After the mold closing is completed, the end of the side rod away from the balls just extends into the second molding cavity, so that when the product is molded, the side rods can be inserted into the product, and when the mold is opened, the side rods can hook the product and make the product stay in the second molding cavity. During the mold opening process, under the action of the return elastic force of the side springs, the side balls roll upward on the side inclined plate, and the side rods gradually move away from the second molding cavity until they are separated from the product. At this time, the limiting mechanism releases the limit on the product, so that the product can be ejected out of the movable mold by the ejector pin, and then the product is automatically limited during the mold closing, and is automatically unlocked in the opening mode, and no additional drive device and control system are required to drive the side rod to operate.

[0027] 4. In the present application, when closing the mold, the telescopic device is used to push the movable mold toward the fixed mold, and the second return spring is stretched. When opening the mold, the telescopic device is moved away from the movable mold. Under the return elastic force of the second return spring, the movable mold can automatically move away from the fixed mold. At the same time, after the movable mold moves away from the fixed mold, the limit of the side spring and the first return spring will also be released. Under the return elastic force of the side spring, the side rod can move away from the second molding cavity, releasing the limit on the product. Under the action of the first return spring, the ejector pin can push the product out of the movable mold, and then after the product is formed between the first molding cavity and the second molding cavity, it is only necessary to release the limit on the movable mold. Under the coordinated action of the side spring, the first return spring and the second return spring, the movable mold and the fixed mold can be automatically opened and the product can be automatically demolded without the help of an additional driving device, making the demolding of the product convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2is a schematic diagram of a top view of the structure of an embodiment of the present application; Figure 3 is along Figure 2 Schematic diagram of the cross-sectional structure along the AA line; Figure 4 is along Figure 2 Schematic diagram of the cross-sectional structure along line BB.

[0030] Reference numerals: 1. Fixed mold; 10. Injection port; 11. first die base; 110. first guide hole; 12. A first box body; 13. The first thermal insulation layer; 14. a first mold body; 140. a first molding cavity; 2. Moving mold; 21, second die base; 210, second guide hole; 2101, first middle vertical hole; 2102, first side vertical hole; 22, second box body; 2201, second middle vertical hole; 2202, second side vertical hole; 2203, first side hole; 23. Second heat insulation layer; 2301. Third middle vertical hole; 2302. Second side hole; 24, second mold body; 240, second molding cavity; 2401, fourth middle vertical hole; 2402, third side hole; 3. Limiting mechanism; 31. Side rod; 32. Side spring; 33. Side connecting seat; 34. Side ball bearing; 35. Side inclined plate; 4. ejector mechanism; 41. ejector plate; 42. ejector; 43. pressing rod; 44. first return spring; 45. arch bracket; 46. telescopic member; 5. Guide mechanism; 51. Guide shaft; 52. Second return spring; 53. Limiting member. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-4 This application is described in further detail.

[0032] The embodiment of the present application discloses an injection mold capable of automatically discharging materials.

[0033] Reference Figure 1 , Figure 2 and Figure 3An injection mold capable of automatically discharging materials, an injection mold capable of automatically discharging materials, comprising a fixed mold 1, a movable mold 2, a limiting mechanism 3, an ejector mechanism 4 and a guide mechanism 5, wherein the guide mechanism 5 comprises a guide shaft 51. The fixed mold 1 is mounted on the first end of the guide shaft 51, and the movable mold 2 is slidably connected to the second end of the guide shaft 51 in the length direction of the guide shaft 51. A first molding cavity 140 is provided at one end of the fixed mold 1 facing the movable mold 2, a second molding cavity 240 is provided at one end of the movable mold 2 facing the fixed mold 1, and an injection port 10 connected to the first molding cavity 140 is provided at one end of the fixed mold 1 away from the movable mold 2. After the fixed mold 1 and the movable mold 2 are molded together, hot-melt raw materials are injected into the space between the first molding cavity 140 and the second molding cavity 240 through the injection port 10.

[0034] Reference Figure 1 , Figure 2 and Figure 3 The limiting mechanism 3 is used to limit the product in the second molding cavity 240. After the hot-melt raw material is cooled and formed into a product, the movable mold 2 is away from the fixed mold 1. The limiting mechanism 3 can limit the product in the second molding cavity 240, so that the product can be located in the movable mold 2 after the mold is opened. After the movable mold 2 is separated from the fixed mold 1, the limiting mechanism 3 releases the limitation on the product.

[0035] Reference Figure 3 and Figure 4 The ejector mechanism 4 includes an ejector plate 41, an ejector pin 42, a pressure rod 43 and a first return spring 44. The ejector plate 41 is arranged on the side of the movable mold 2 away from the fixed mold 1. The ejector pin 42, the pressure rod 43 and the first return spring 44 are all arranged along the length direction of the guide shaft 51, and are all located between the ejector plate 41 and the fixed mold 1. In the length direction of the guide shaft 51, the ejector pin 42 and the pressure rod 43 are both slidably connected to the movable mold 2. The first end of the ejector pin 42 is connected to the ejector plate 41, and the second end is located in the second molding cavity 240. The first end of the pressure rod 43 is connected to the ejector plate 41, and the second end is used to abut against the fixed mold 1. The first end of the first return spring 44 is connected to the ejector plate 41, and the second end is connected to the movable mold 2.

[0036] Reference Figure 3 and Figure 4In the embodiment of the present application, when the fixed mold 1 and the movable mold 2 are separated, the first return spring 44 is in a state of being free of force, and the second end of the ejector pin 42 and the second end of the pressure rod 43 are both located between the fixed mold 1 and the movable mold 2. During the process of the fixed mold 1 and the movable mold 2 being molded together, the second end of the pressure rod 43 abuts against the fixed mold 1, and the fixed mold 1 pushes the pressure rod 43 toward the movable mold 2. When the fixed mold 1 and the movable mold 2 are just molded together, the second end of the ejector pin 42 is also just coplanar with the inner wall of the second molding cavity 240, and the first return spring 44 is in a stretched state. Then, hot-melt raw materials are injected into the space between the first molding cavity 140 and the second molding cavity 240 through the injection port 10. After the hot-melt raw materials are cooled and formed into a product, the movable mold 2 is away from the fixed mold 1, and the limiting mechanism 3 can limit the product in the second molding cavity 240, so that the product can be located in the movable mold 2 after the mold is opened. After the movable mold 2 is separated from the fixed mold 1, the limiting mechanism 3 releases the limit on the product. After the mold is opened, the movable mold 2 moves away from the fixed mold 1, the limit of the pressure rod 43 is released, the first reset spring 44 starts to reset, and drives the ejector pin 42 to move and reset in the direction of the fixed mold 1, so that the product is separated from the movable mold 2, and the product is automatically demolded. In the present application, through the coordinated cooperation between the ejector plate 41, the ejector pin 42, the pressure rod 43 and the first reset spring 44, when the mold is opened, the first reset spring 44 can drive the ejector pin 42 to eject the product out of the mold through its own elastic force, and no additional driving device and control system are required to drive the ejector pin 42 to operate, which reduces the cost of the demolding mechanism while ensuring the automatic discharge of the product.

[0037] Reference Figure 3 and Figure 4 The fixed mold 1 includes a first mold base 11, a first box body 12 and a first mold body 14. The first mold base 11 is provided with a first guide hole 110. The first end of the guide shaft 51 is arranged in the first guide hole 110 and connected to the first mold base 11. The movable mold 2 includes a second mold base 21, a second box body 22 and a second mold body 24. The second mold base 21 is provided with a second guide hole 210. The second end of the guide shaft 51 is arranged in the second guide hole 210. The first box body 12 and the second box body 22 are both arranged between the first mold base 11 and the second mold base 21, and the box opening of the first box body 12 and the box opening of the second box body 22 are arranged oppositely, and the box bottom of the first box body 12 is connected to the first mold base 11, and the box bottom of the second box body 22 is connected to the second mold base 21. The first mold body 14 is installed in the first box body 12, and a first heat insulation layer 13 is connected between the first box body 12 and the first mold body 12. The first molding cavity 140 is arranged at one end of the first mold body 14 away from the first box body 12. The second mold body 24 is installed in the second box body 22, and the second insulation layer 23 is connected between the second box body 22. The second molding cavity 240 is provided at one end of the second mold body 24 away from the second box body 22. The second end of the pressing rod 43 is used to abut against the first box body 12 on the side of the first insulation layer 13.

[0038] Reference Figure 3 and Figure 4 In the embodiment of the present application, the first mold body 14 and the second mold body 24 are used to form a product. The first heat insulation layer 13 is used to prevent the heat on the first mold body 14 from being easily transferred to the first box body 12, and the second heat insulation layer 23 is used to prevent the heat on the second mold body 24 from being easily transferred to the second box body 22. In this way, the first return spring 44 is not easily heated, which is conducive to the long-term and stable operation of the first return spring 44.

[0039] Reference Figure 3 and Figure 4 , a first middle vertical hole 2101 is provided on the second mold base 21, a second middle vertical hole 2201 coaxial with the first middle vertical hole 2101 is provided on the second box body 22, a third middle vertical hole 2301 coaxial with the second middle vertical hole 2201 is provided on the second heat insulation layer 23, and a fourth middle vertical hole 2401 coaxial with the third middle vertical hole 2301 is provided on the second mold body 24. The first middle vertical hole 2101 is arranged along the length direction of the guide shaft 51, and the ejector pin 42 is located in the first middle vertical hole 2101, the second middle vertical hole 2201, the third middle vertical hole 2301 and the fourth middle vertical hole 2401. In the embodiment of the present application, the ejector pin 42 is slidably connected to the movable mold 2 through the first middle vertical hole 2101, the second middle vertical hole 2201, the third middle vertical hole 2301 and the fourth middle vertical hole 2401.

[0040] Reference Figure 3 and Figure 4 The ejector pin 42 is dynamically sealed to the second mold body 24. In the embodiment of the present application, the hot melt raw material is not easy to enter the gap between the ejector pin 42 and the second mold body 24.

[0041] Reference Figure 3 and Figure 4 , a first side vertical hole 2102 is provided on the second mold base 21, and a second side vertical hole 2202 coaxial with the first side vertical hole 2102 is provided on the second box body 22. The first side vertical hole 2102 is arranged along the length direction of the guide shaft 51, and the pressing rod 43 is located in the first side vertical hole 2102 and the second side vertical hole 2202. In the embodiment of the present application, the pressing rod 43 is slidably connected to the movable mold 2 through the first side vertical hole 2102 and the second side vertical hole 2202.

[0042] Reference Figure 3 and Figure 4 The first return spring 44 is sleeved on the pressing rod 43 and / or the ejector pin 42. In the embodiment of the present application, the pressing rod 43 and / or the ejector pin 42 are used to guide the expansion and contraction of the first return spring 44.

[0043] Reference Figure 3 and Figure 4 , the ejector mechanism 4 also includes an arch support 45 and a telescopic member 46. The arch support 45 is installed at one end of the movable mold 2 away from the fixed mold 1. The telescopic member 46 is arranged on the side of the top plate 41 away from the fixed mold 1, and is arranged along the length direction of the guide shaft 51, and one end is connected to the arch support 45, and the other end is used to telescope toward the top plate 41. In the embodiment of the present application, the arch support 45 is used to be connected to a telescopic device, and the telescopic device drives the arch support 45 to move, thereby moving the movable mold 2 closer to or away from the fixed mold 1. With the long-term use of the first return spring 44, the first return spring 44 will inevitably have a deterioration in elasticity. At this time, if the product needs to be demoulded, the return elastic force of the first return spring 44 is insufficient, and the telescopic member 46 can be extended to push the top plate 41, so that the ejector 42 can push the product out of the movable mold 2.

[0044] Reference Figure 3 and Figure 4 The limiting mechanism 3 includes a side rod 31, a side spring 32, a side connecting seat 33, a side ball 34 and a side inclined plate 35. The side wall of the second box body 22 is provided with a first side hole 2203, and the first side hole 2203 is radially arranged on the side of the guide shaft 51. The second heat insulation layer 23 is provided with a second side hole 2302 coaxial with the first side hole 2203, and the second mold body 24 is provided with a third side hole 2402 coaxial with the second side hole 2302. The side rod 31 is coaxially arranged in the first side hole 2203, the second side hole 2302 and the third side hole 2402, and the side rod 31 is dynamically sealed and connected to the movable mold 2. The side connecting seat 33 is arranged on the side of the second box body 22 and connected to the first end of the side rod 31. The side spring 32 is sleeved on the side rod 31, and one end is connected to the second box body 22, and the other end is connected to the side connecting seat 33. The side ball bearing 34 is rotatably mounted on one end of the side connecting seat 33 away from the side rod 31. The side inclined plate 35 is arranged opposite to the side ball bearing 34, and one end is mounted on the side of the first box body 12, and the other end is arranged on the side of the first box body 12 away from the first mold base 11, and the distance between the side inclined plate 35 and the first box body 12 and the second box body 22 increases from the first mold base 11 to the second mold base 21.

[0045] Reference Figure 3 and Figure 4In the embodiment of the present application, during the mold closing process, the movable mold 2 moves toward the fixed mold 1, and the side balls 34 enter between the side inclined plate 35 and the second box body 22, and the side balls 34 roll downward on the side inclined plate 35. When the side balls 34 roll on the side inclined plate 35, they gradually approach the second box body 22, the side springs 32 are gradually compressed, and the side rods 31 gradually extend into the second molding cavity 240. After the mold closing is completed, the end of the side rod 31 away from the balls just extends into the second molding cavity 240, so that when the product is molded, the side rod 31 can be inserted into the product, and when the mold is opened, the side rod 31 can hook the product and make the product stay in the second molding cavity 240. During the mold opening process, under the action of the return elastic force of the side spring 32, the side balls 34 roll upward on the side inclined plate 35, and the side rods 31 gradually move away from the second molding cavity 240 until they are separated from the product. At this time, the limiting mechanism 3 releases the limit on the product, so that the product can be ejected out of the movable mold 2 by the ejector pin 42.

[0046] Reference Figure 3 and Figure 4 The guide mechanism 5 further includes a second return spring 52 and a stopper 53. The stopper 53 is arranged on the side of the movable mold 2 away from the fixed mold 1 and is connected to the guide shaft 51. The second return spring 52 is sleeved on the guide shaft 51, and one end is connected to the stopper 53, and the other end is connected to the movable mold 2.

[0047] Reference Figure 3 and Figure 4 In the embodiment of the present application, when the mold is closed, the telescopic device is used to push the movable mold 2 toward the fixed mold 1, and the second return spring 52 is stretched. When the mold is opened, the telescopic device is moved away from the movable mold 2. Under the return elastic force of the second return spring 52, the movable mold 2 can automatically move away from the fixed mold 1. At the same time, after the movable mold 2 moves away from the fixed mold 1, the limit of the side spring 32 and the first return spring 44 will also be released. Under the return elastic force of the side spring 32, the side rod 31 can move away from the second molding cavity 240, and the limit of the product is released. Under the action of the first return spring 44, the ejector pin 42 can push the product out of the movable mold 2, and then the product is formed between the first molding cavity 140 and the second molding cavity 240. After that, it is only necessary to release the limit of the movable mold 2. Under the coordinated action of the side spring 32, the first return spring 44 and the second return spring 52, the movable mold 2 and the fixed mold 1 can automatically open the mold and automatically demold the product without the help of an additional driving device, so that the demolding of the product is convenient and quick.

[0048] The implementation principle of an injection mold capable of automatically discharging materials in the embodiment of the present application is as follows: When no additional pressure is applied to the side spring 32, the first return spring 44 and the second return spring 52, the fixed mold 1 and the movable mold 2 are in an open mold state, and the second end of the ejector pin 42 and the second end of the pressure rod 43 are both located between the fixed mold 1 and the movable mold 2, and the side rod 31 is located outside the second molding cavity 240.

[0049] The implementation principle in the mold closing process is: During the mold closing process, pressure is applied to the movable mold 2 so that the movable mold 2 gradually approaches the fixed mold 1. During this process, the limit mechanism 3, the ejector mechanism 4 and the guide mechanism 5 will all operate along with the movement of the movable mold 2.

[0050] When the guide mechanism 5 is in operation, as the movable mold 2 gradually approaches the fixed mold 1 , the second return spring 52 will be gradually stretched.

[0051] When the ejector mechanism 4 is in operation, as the movable mold 2 gradually approaches the fixed mold 1, the fixed mold 1 will contact the second end of the pressure rod 43 and push the pressure rod 43 toward the movable mold 2. At this time, the first return spring 44 will also be gradually stretched, and the second end of the ejector 42 will gradually move away from the second molding cavity 240. After the mold is fully closed, the second end of the ejector 42 is exactly coplanar with the inner wall of the second molding cavity 240.

[0052] When the limiting mechanism 3 is running, as the movable mold 2 gradually approaches the fixed mold 1, the side ball 34 will enter between the side inclined plate 35 and the second box body 22, and roll downward along the side inclined plate 35. Since the distance between the side inclined plate 35 and the first box body 12 and the second box body 22 increases from the first mold base 11 to the second mold base 21, the ball will gradually approach the second box body 22 when rolling downward on the side inclined plate 35. As the ball gradually approaches the second box body 22, the side spring 32 will be gradually compressed, and at the same time, the side rod 31 will gradually extend into the second molding cavity 240. After the mold is fully closed, part of the side rod 31 is located in the second molding cavity 240.

[0053] After the mold is completely closed, hot-melt raw materials are injected into the space between the first molding cavity 140 and the second molding cavity 240 through the injection port 10. After the hot-melt raw materials are cooled and formed into a product, the mold is ready to be opened.

[0054] The implementation principle in the mold opening process is: The pressure applied to the movable mold 2 is released, and then the additional pressure on the side spring 32, the first return spring 44 and the second return spring 52 due to driving the movable mold 2 is also removed. At this time, the side spring 32, the first return spring 44 and the second return spring 52 begin to reset.

[0055] Under the action of the return elastic force of the second return spring 52 , the movable mold 2 can automatically move away from the fixed mold 1 , the limit of the fixed mold 1 on the pressing rod 43 will also be released, and automatic mold opening is achieved.

[0056] After the mold is opened, the ball moves upward relative to the side inclined plate 35 and gradually moves away from the side inclined plate 35. At this time, under the action of the restoring elastic force of the side spring 32, the ball will gradually move away from the movable mold 2, and then the side rod 31 will gradually move away from the second molding cavity 240 until it is separated from the product. At this time, the limiting mechanism 3 releases the limit on the product, so that the product can be pushed out of the movable mold 2 by the ejector pin 42.

[0057] After the limiting mechanism 3 releases the limiting of the product, under the action of the restoring elastic force of the first restoring spring 44, the ejector pin 42 moves toward the product and ejects the product out of the second molding cavity 240, thereby realizing automatic demoulding of the product.

[0058] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate that there is at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0059] The above are all optional embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An injection mold capable of automatically discharging materials, characterized in that: It comprises a fixed mold (1), a movable mold (2), a limiting mechanism (3), an ejector mechanism (4) and a guide mechanism (5), wherein the guide mechanism (5) comprises a guide shaft (51); The fixed mold (1) is mounted on a first end of the guide shaft (51), and the movable mold (2) is slidably connected to a second end of the guide shaft (51) in a length direction of the guide shaft (51); A first molding cavity (140) is provided at one end of the fixed mold (1) facing the movable mold (2), and a second molding cavity (240) is provided at one end of the movable mold (2) facing the fixed mold (1); The limiting mechanism (3) is used to limit the product within the second molding cavity (240); The ejector mechanism (4) comprises an ejector plate (41), an ejector pin (42), a pressure rod (43) and a first return spring (44); the ejector plate (41) is arranged on a side of the movable mold (2) away from the fixed mold (1); The ejector pin (42), the pressing rod (43) and the first return spring (44) are all arranged along the length direction of the guide shaft (51), and are all located between the ejector plate (41) and the fixed mold (1); In the length direction of the guide shaft (51), the ejector pin (42) and the pressing rod (43) are both slidably connected to the movable mold (2); The first end of the ejector pin (42) is connected to the ejector plate (41), and the second end is located in the second molding cavity (240); The first end of the pressing rod (43) is connected to the top plate (41), and the second end is used to abut against the fixed mold (1); The first end of the first return spring (44) is connected to the top plate (41), and the second end is connected to the movable mold (2).

2. The automatic discharging injection mold according to claim 1, characterized in that: The fixed mold (1) comprises a first mold base (11), a first box body (12) and a first mold body (14); the first mold base (11) is provided with a first guide hole (110); the first end of the guide shaft (51) is arranged in the first guide hole (110) and is connected to the first mold base (11); The movable mold (2) comprises a second mold base (21), a second box body (22) and a second mold body (24); the second mold base (21) is provided with a second guide hole (210); the second end of the guide shaft (51) is arranged in the second guide hole (210); The first box body (12) and the second box body (22) are both arranged between the first mold base (11) and the second mold base (21), and the box opening of the first box body (12) and the box opening of the second box body (22) are arranged opposite to each other, and the box bottom of the first box body (12) is connected to the first mold base (11), and the box bottom of the second box body (22) is connected to the second mold base (21); The first mold body (14) is installed in the first box body (12), and a first heat insulation layer (13) is connected between the first box body (12); the first molding cavity (140) is provided at an end of the first mold body (14) away from the first box body (12); The second mold body (24) is installed in the second box body (22), and a second heat insulation layer (23) is connected between the second mold body and the second box body (22); the second molding cavity (240) is provided at one end of the second mold body (24) away from the second box body (22); The second end of the pressing rod (43) is used to abut against the first box body (12) on the side of the first heat insulation layer (13).

3. The automatic discharging injection mold according to claim 2, characterized in that: The second mold base (21) is provided with a first middle vertical hole (2101), the second box body (22) is provided with a second middle vertical hole (2201) coaxial with the first middle vertical hole (2101), the second heat insulation layer (23) is provided with a third middle vertical hole (2301) coaxial with the second middle vertical hole (2201), and the second mold body (24) is provided with a fourth middle vertical hole (2401) coaxial with the third middle vertical hole (2301); The first middle vertical hole (2101) is arranged along the length direction of the guide shaft (51), and the ejector pin (42) is located in the first middle vertical hole (2101), the second middle vertical hole (2201), the third middle vertical hole (2301) and the fourth middle vertical hole (2401).

4. The automatic discharging injection mold according to claim 3, characterized in that: The ejector pin (42) is dynamically sealed to the second mold body (24).

5. The automatic discharging injection mold according to claim 2, characterized in that: The second mold base (21) is provided with a first side vertical hole (2102), and the second box body (22) is provided with a second side vertical hole (2202) coaxial with the first side vertical hole (2102); The first side vertical hole (2102) is arranged along the length direction of the guide shaft (51), and the pressing rod (43) is located in the first side vertical hole (2102) and the second side vertical hole (2202).

6. The automatic discharging injection mold according to claim 5, characterized in that: The first return spring (44) is sleeved on the pressure rod (43) and / or the ejector pin (42).

7. The automatic discharging injection mold according to claim 1, characterized in that: The ejector mechanism (4) further comprises an arch support (45) and a telescopic member (46); the arch support (45) is mounted on an end of the movable mold (2) away from the fixed mold (1); The telescopic member (46) is arranged on a side of the top plate (41) away from the fixed mold (1) and is arranged along the length direction of the guide shaft (51), with one end connected to the arch support (45) and the other end being used to telescope toward the top plate (41).

8. The automatic discharging injection mold according to claim 2, characterized in that: The limiting mechanism (3) comprises a side rod (31), a side spring (32), a side connecting seat (33), a side ball (34) and a side inclined plate (35); a first side hole (2203) is provided on the side wall of the second box body (22); the first side hole (2203) is radially arranged on the side of the guide shaft (51); a second side hole (2302) coaxial with the first side hole (2203) is provided on the second heat insulation layer (23); and a third side hole (2402) coaxial with the second side hole (2302) is provided on the second mold body (24); The side rod (31) is coaxially arranged in the first side hole (2203), the second side hole (2302) and the third side hole (2402); The side connecting seat (33) is arranged on the side of the second box body (22) and is connected to the first end of the side rod (31); The side spring (32) is sleeved on the side rod (31), and one end of the side spring is connected to the second box body (22), and the other end of the side spring is connected to the side connecting seat (33); The side ball (34) is rotatably mounted on an end of the side connecting seat (33) away from the side rod (31); The side inclined plate (35) is arranged opposite to the side ball (34), and one end is mounted on the side of the first box body (12), and the other end is arranged on a side of the first box body (12) away from the first mold base (11), and in a direction from the first mold base (11) to the second mold base (21), the distance between the side inclined plate (35) and the first box body (12) and the second box body (22) increases.

9. The automatic discharging injection mold according to claim 1, characterized in that: The guide mechanism (5) further comprises a second return spring (52) and a limiter (53); the limiter (53) is arranged on a side of the movable mold (2) away from the fixed mold (1) and is connected to the guide shaft (51); The second return spring (52) is sleeved on the guide shaft (51), and one end of the second return spring is connected to the limiter (53), and the other end of the second return spring is connected to the movable mold (2).

Images