Special injection molding machine for drip irrigation sheet

Abstract

The utility model discloses a special injection molding machine for a drip irrigation sheet. The special injection molding machine comprises a glue injection assembly and a mold locking assembly, the mold locking assembly comprises a mold locking head plate, a mold locking second plate and a mold locking tail plate which are movably connected through guide columns; an injection molding cavity for accommodating an injection mold is formed between the mold locking plate II and the mold locking head plate; an ejection oil cylinder assembly and an ejection plate assembly are arranged on the mold locking plate II; the four guide columns are respectively distributed at four corners of the mold locking head plate, the mold locking second plate and the mold locking tail plate in parallel; the distance between the guide pillars can reach 790mm; the ejection oil cylinder assembly comprises an oil cylinder body and an ejection piston rod arranged in the oil cylinder body in a sliding mode. The maximum ejection stroke of the ejection oil cylinder is 80mm; according to the utility model, the structural strength of the mold locking assembly is enhanced, the distance between the guide pillars is further increased, so that the mold with larger size can be processed, the ejection stroke of the ejection oil cylinder is shortened, the mold locking force is improved, the synchronous ejection is controlled by the control system when the mold locking assembly opens the mold, and compared with the prior art, the injection molding amount of each mold is increased by 1 / 4.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding equipment, in particular to an injection molding machine dedicated to drip irrigation sheets. Background Art

[0002] An injection molding machine is a mechanical device used to manufacture plastic products. It can heat plastic, apply high pressure to the molten plastic, and inject it to fill the mold cavity. Injection molding machines are widely used in industrial production and can produce various plastic products, such as household appliance casings, automotive parts, daily necessities, medical devices, etc. Injection molding machines are widely used in the manufacture of various plastic products, such as mobile phone cases, computer casings, toys, etc. A drip irrigation sheet is the core part of drip irrigation equipment. Through the drip irrigation sheet, water can be evenly dripped onto the roots of plants, improving the utilization rate of water and reducing the waste of water resources.

[0003] Traditional injection molding machines dedicated to drip irrigation sheets usually adopt a multi-cavity design to improve production efficiency by increasing the number of cavities. At the same time, the injection molding machine is also equipped with an ejection cylinder for ejecting the molded plastic products from the mold. In addition, in order to ensure the stable operation of the injection molding machine, a control system is usually set up to control the operation of each component of the injection molding machine. However, there are still some problems in the actual application of existing injection molding machines. First of all, although the production efficiency can be improved by increasing the number of cavities, this method often increases the complexity and cost of the equipment. Secondly, existing injection molding machines usually only have one set of control systems and cannot perform the two actions of mold opening and ejection simultaneously, which to a certain extent limits the operation efficiency and stability of the injection molding machine.

[0004] Therefore, further research and development are still needed to solve the problems existing in the above-mentioned prior art. Summary of the Utility Model

[0005] Therefore, in order to solve the problems existing in the above-mentioned prior art, the purpose of the utility model is to provide an injection molding machine dedicated to drip irrigation sheets.

[0006] The purpose of the utility model is achieved by adopting the following technical solutions:

[0007] A special injection molding machine for drip irrigation sheets comprises a frame and a glue injection assembly and a mold locking assembly arranged on the frame; the mold locking assembly comprises a mold locking head plate, a second mold locking plate, and a mold locking tail plate which are movably connected through guide pillars; the mold locking head plate is fixed on the frame, and the mold locking tail plate is transmission-connected with the second mold locking plate through a mold locking drive assembly; an injection cavity for accommodating an injection mold is arranged between the second mold locking plate and the mold locking head plate; an ejector oil cylinder assembly and an ejector plate assembly are arranged on the second mold locking plate; four guide pillars are respectively and parallelly distributed at four corners of the mold locking head plate, the second mold locking plate, and the mold locking tail plate; the guide pillar spacing between two guide pillars located in the same plane is 670-790 mm; the ejector oil cylinder assembly comprises an oil cylinder body, and an ejector piston rod slidably arranged inside the oil cylinder body; and the maximum ejection stroke of the ejector oil cylinder is 80 mm.

[0008] Furthermore, the four corners of the second clamping plates are respectively provided with guide holes for passing guide pillars, and two guide pillar reinforcement sleeves are respectively distributed in the guide holes at intervals; the guide pillar reinforcement sleeves are clamped on the inner wall of the guide hole and sleeved on the outer periphery of the guide pillar.

[0009] Furthermore, the ejector plate assembly is transmission-connected to the ejector oil cylinder and is used for the ejection operation of the drip irrigation sheet after the injection molding is completed; it includes an ejector plate installed on the second clamping plate, a central ejector rod installed on the ejector plate and transmission-connected to the ejector piston rod, and ejector guide rods spaced around the central ejector rod.

[0010] Furthermore, the mold locking drive assembly includes a mold locking cylinder and a hook hinge assembly that are transmission-connected; the mold locking tail plate is transmission-connected to the second mold locking plate through the hook hinge assembly; the hook hinge assembly includes a first hook hinge and a second hook hinge that are rotationally connected; a first E-type mounting portion is provided on the mold locking tail plate, and a second E-type mounting portion is provided on the second mold locking plate; the ends of the first hook hinge and the second hook hinge that are away from each other are respectively connected to the first E-type mounting portion and the second E-type mounting portion; and a plurality of reinforcing ribs corresponding to the edges of the second E-type mounting portion are provided on the top of the second mold locking plate.

[0011] Furthermore, the upper surface of the reinforcing rib is tilted downward along the advancing direction of the second clamping plates, and an arc-shaped extension portion extending in a circumferential trumpet shape is provided at the end thereof.

[0012] Furthermore, a mold adjusting assembly for adjusting the mold locking force is provided on the mold locking tail plate; the mold adjusting assembly comprises a mold adjusting gear, a mold adjusting nut, and a mold adjusting motor installed on the outer surface of the mold locking tail plate; the mold adjusting gear is installed at the center of the mold locking tail plate, and the four mold adjusting nuts are distributed at the four corners of the mold locking tail plate and mesh with the mold adjusting gear for transmission; the mold adjusting motor is arranged below the mold adjusting gear, and its output shaft meshes with the mold adjusting gear for transmission.

[0013] Furthermore, an eccentric roller seat is provided on the mold locking tail plate, and the eccentric roller seat is located on the inner side of the mold adjusting gear and is rollingly connected to the inner wall of the mold adjusting gear.

[0014] Furthermore, the clamping force of the clamping assembly is 380T-430T.

[0015] Furthermore, it also includes a control system, which is electrically connected to the ejection cylinder and the clamping cylinder. After the injection molding is completed, when the clamping cylinder is controlled to open the mold through the hook hinge assembly, the ejection cylinder synchronously drives the central ejection rod and the ejection guide rod to perform the ejection operation.

[0016] Furthermore, the injection molding assembly includes a shooting platform and a melt-molding cylinder installed on the shooting platform, a shooting screw located in the melt-molding cylinder, and a shooting cylinder drivingly connected to the shooting screw; the length-to-diameter ratio of the shooting screw is 24:1.

[0017] Compared with the prior art, the beneficial effects of the present invention are at least in the following aspects:

[0018] 1. The utility model optimizes the structural design of the clamping assembly and strengthens the structural strength of the clamping assembly, so that it can withstand a larger mold weight and pressure during the injection molding process; further increases the distance between the guide pillars so that it can handle larger molds, shortens the ejection stroke of the ejection cylinder and increases the clamping force, and controls the synchronous ejection when the clamping assembly is opened through the control system. Compared with the traditional drip irrigation sheet dedicated injection molding machine, the injection volume of each mold is increased by 1 / 4; the number of drip irrigation sheets produced per cycle is increased, thereby improving the overall shipment volume; because each mold can produce more drip irrigation sheets, the overall production cycle is effectively shortened, and the overall operation efficiency and output of the production line are improved;

[0019] 2. The utility model optimizes the structure of the second clamping plate. By arranging a number of guide pillar copper sleeves in the guide hole, it is not only conducive to the sliding of the second clamping plate along the guide pillar, but also can improve the structural strength. At the same time, the upper and lower surfaces of the second clamping plate are respectively provided with reinforcing ribs inclined downward along the forward direction of the second clamping plate, and at the same time, an arc-shaped expansion part extending in a circumferential trumpet shape is provided at its end. This design not only increases the supporting area of ​​the reinforcing ribs and the main body of the second clamping plate and improves the rigidity of the entire structure, but also helps to disperse and reduce stress concentration during the clamping process, thereby reducing the fatigue and fracture risks of the structural parts under high load conditions, improving the deformation resistance and bearing capacity of the structure, and providing a strong guarantee for improving the clamping force. The clamping force of the utility model reaches 380T, which is much better than the clamping force of the traditional drip irrigation sheet injection molding machine;

[0020] 3. After the injection molding is completed, when the present utility model controls the mold clamping oil cylinder to open the mold through the hook hinge assembly, the ejector oil cylinder synchronously drives the central ejector rod and the ejector guide rod to perform the ejection operation, shortening the ejection cycle, further improving the production efficiency, and having strong practicability. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the overall structure of the special injection molding machine for drip irrigation sheets in the preferred embodiment of the present utility model;

[0022] Figure 2 It is a partial structure schematic diagram of the special injection molding machine for drip irrigation sheets in the preferred embodiment of the present utility model with the frame and the injection component omitted;

[0023] Figure 3 It is a schematic diagram of the vertical section of the mold clamping assembly of the special injection molding machine for drip irrigation sheets in the preferred embodiment of the present utility model;

[0024] Figure 4 It is a partial structure schematic diagram of the mold clamping mechanism of the special injection molding machine for drip irrigation sheets in the preferred embodiment of the present utility model;

[0025] Figure 5 It is a front view partial structure schematic diagram of the mold clamping mechanism of the special injection molding machine for drip irrigation sheets in the preferred embodiment of the present utility model;

[0026] Figure 6 It is a front view partial structure schematic diagram of the ejector plate assembly of the special injection molding machine for drip irrigation sheets in the preferred embodiment of the present utility model;

[0027] Figure 7 It is a control relationship diagram of the control system, the mold clamping oil cylinder and the ejector oil cylinder of the special injection molding machine for drip irrigation sheets in the preferred embodiment of the present utility model;

[0028] Figure 8 It is the overall shape of the drip irrigation sheet of the special injection molding machine for drip irrigation sheets in the preferred embodiment of the present utility model.

[0029] In the figure:

[0030] 1. Frame; 2. Glue injection assembly; 21. Glue melting cylinder; 22. Glue injection screw; 23. Glue injection cylinder; 3. Clamping assembly; 31. Guide column; 32. Clamping head plate; 33. Clamping second plate; 331. Guide hole; 332. Second E-type mounting part; 333. Reinforcement rib; 3331. Arc-shaped extension part; 34. Clamping tail plate; 341. First E-type mounting part; 35. Guide column reinforcement sleeve; 4. Clamping drive Dynamic assembly; 41, mold locking cylinder; 42, hook hinge assembly; 421, first hook hinge; 422, second hook hinge; 5, ejector cylinder assembly; 51, ejector cylinder; 52, ejector piston rod; 6, ejector plate assembly; 61, ejector plate; 62, center ejector rod; 63, ejector guide rod; 7, mold adjustment assembly; 71, mold adjustment gear; 72, mold adjustment nut; 73, mold adjustment motor; 74, eccentric roller seat;

[0031] 10. Control system; A. Injection cavity; L. Center distance of guide pillars; M. Distance of guide pillars to outer walls; B. Drip irrigation sheet. DETAILED DESCRIPTION

[0032] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively in conjunction with the relevant drawings and embodiments below. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.

[0033] like Figure 1-8 As shown, this embodiment 1 provides a special injection molding machine for drip irrigation sheets, including a frame 1 and a glue injection assembly 2 and a mold locking assembly 3 arranged on the frame 1; the mold locking assembly 3 includes a mold locking head plate 32, a mold locking second plate 33, and a mold locking tail plate 34 that are movably connected through a guide column 31; the mold locking head plate 32 is fixed on the frame 1, and the mold locking tail plate 34 is connected to the mold locking second plate 33 through a mold locking drive assembly 4; an injection cavity A for accommodating an injection mold is provided between the mold locking second plate 33 and the mold locking head plate 32; the mold locking second plate 33 is provided with Ejector cylinder assembly 5, ejector plate assembly 6; the four guide pillars 31 are respectively distributed in parallel at the four corners of the clamping head plate 32, the clamping second plate 33, and the clamping tail plate 34; in order to increase the accommodating space of the mold, the distance L between the centers of the two guide pillars 31 located in the same plane is 790mm; the outer wall distance M between the two guide pillars 31 located in the same plane is 670mm; the ejector cylinder assembly 5 includes a cylinder body and an ejector piston rod 52 slidably arranged inside the cylinder body; the maximum ejection stroke of the ejector cylinder 51 is 80mm.

[0034] Specifically, the injection component 2 includes an injection platform, a melting cylinder 21 mounted on the injection platform, an injection screw 22 located inside the melting cylinder 21, and an injection oil cylinder 23 drivingly connected to the injection screw 22; the length-diameter ratio of the injection screw 22 is 24:1.

[0035] In this embodiment, the injection cavity is used to accommodate a mold, which has a plurality of injection cavities. Under the driving action of the mold clamping drive assembly, the second mold clamping plate pushes the mold forward and tightly presses it against the first mold clamping plate, and the injection screw is driven by the injection oil cylinder for injection molding. The present invention shortens the ejection stroke of the ejection oil cylinder.

[0036] In this embodiment, a single-cylinder injection is adopted to increase the injection speed, and at the same time, there is less mechanical vibration, which helps to improve the injection molding precision and the mold life. Further, the length-diameter ratio of the injection screw is increased. Compared with the length-diameter ratio of 22:1 of the traditional injection molding machine, the length-diameter ratio of the present invention is 24:1, which improves the plasticizing effect and helps to provide a higher injection pressure during the injection process to ensure that the plastic can fill the complex mold structure.

[0037] To increase the accommodation space of the mold, preferably, the distance L between the centers of the two guide columns 31 on the same plane is 790 mm; the four corners of the second mold clamping plate 33 are respectively provided with guide holes 331 for passing through the guide columns 31, and two guide column reinforcing sleeves 35 are respectively and spacedly distributed in the guide holes 331; the guide column reinforcing sleeves 35 are stuck on the inner wall of the guide holes 331 and sleeved on the outer periphery of the guide columns 31.

[0038] In this embodiment, the mold clamping force of the mold clamping assembly 3 is 380T - 430T.

[0039] Preferably, the ejection plate assembly 6 is drivingly connected to the ejection oil cylinder 51 and is used for ejecting the drip irrigation sheet B after injection molding; it includes an ejection plate 61 mounted on the second mold clamping plate 33, a central ejection rod 62 mounted on the ejection plate 61 and drivingly connected to the ejection piston rod 52, and ejection guide rods 63 spacedly distributed around the central ejection rod 62.

[0040] Preferably, the mold clamping drive assembly 4 includes a mold clamping oil cylinder 41 and a hook hinge assembly 42 that are drivingly connected; the mold clamping tail plate 34 is drivingly connected to the second mold clamping plate 33 through the hook hinge assembly 42; the hook hinge assembly 42 includes a first hook hinge 421 and a second hook hinge 422 that are rotatably connected; the mold clamping tail plate 34 is provided with a first E-shaped mounting portion 341, and the second mold clamping plate 33 is provided with a second E-shaped mounting portion 332; the mutually remote ends of the first hook hinge 421 and the second hook hinge 422 are respectively connected to the first E-shaped mounting portion 341 and the second E-shaped mounting portion 332; several reinforcing ribs 333 corresponding to the ribs of the second E-shaped mounting portion 332 are provided on the top of the second mold clamping plate 33.

[0041] Preferably, the upper surface of the reinforcing rib 333 is inclined downward along the advancing direction of the second clamping plate 33, and an arc-shaped expansion portion 3331 extending in a horn shape in the circumferential direction is provided at its end.

[0042] In this embodiment, the present utility model optimizes the structure of the second clamping plate. By arranging a plurality of guide post bushings in the guide holes, it not only facilitates the sliding of the second clamping plate along the guide posts, but also can enhance the structural strength. At the same time, reinforcing ribs inclined downward along the advancing direction of the second clamping plate are respectively arranged on the upper and lower surfaces of the second clamping plate, and arc-shaped expansion portions extending in a horn shape in the circumferential direction are provided at their ends. Such a design not only increases the supporting area between the reinforcing ribs and the main body of the second clamping plate, improves the stiffness of the entire structure, but also is conducive to dispersing and reducing stress concentration during the clamping process, thereby reducing the fatigue and fracture risks of structural components under high load conditions, improving the anti-deformation ability and load-bearing capacity of the structure, and providing a strong guarantee for improving the clamping force. The clamping force of the present utility model reaches 380T, far superior to that of traditional drip irrigation sheet injection molding machines.

[0043] Preferably, a die-setting assembly 7 for adjusting the clamping force is provided on the clamping tail plate 34; the die-setting assembly 7 includes a die-setting large gear 71, a die-setting nut 72, and a die-setting motor 73 installed on the outer surface of the clamping tail plate 34; the die-setting large gear 71 is installed at the center of the clamping tail plate 34, and the four die-setting nuts 72 are distributed at the four corners of the clamping tail plate 34 and meshed with the die-setting large gear 71 for transmission; the die-setting motor 73 is arranged below the die-setting large gear 71, and its output shaft is meshed with the die-setting large gear 71 for transmission.

[0044] Preferably, an eccentric roller seat 74 is provided on the clamping tail plate 34, and the eccentric roller seat 74 is located inside the die-setting large gear 71 and is in rolling connection with the inner wall of the die-setting large gear 71.

[0045] Preferably, a control system 10 is further included, and the control system 10 is electrically connected to the ejection oil cylinder 51 and the clamping oil cylinder 41. After the injection molding is completed, when the control system 10 controls the clamping oil cylinder 41 to open the mold through the hook hinge assembly 42, the ejection oil cylinder 51 synchronously drives the central ejection rod 62 and the ejection guide rod 63 to perform an ejection operation.

[0046] After the injection molding is completed, the present utility model controls the clamping oil cylinder to open the mold through the hook hinge assembly, and at the same time, the ejection oil cylinder synchronously drives the central ejection rod and the ejection guide rod to perform an ejection operation, shortening the ejection cycle, further improving the production efficiency, and having strong practicability.

[0047] The utility model optimizes the structural design of the clamping assembly, strengthens the structural strength of the clamping assembly, and can withstand a greater mold weight and pressure during the injection molding process; further increases the guide column spacing so that it can handle larger molds, while shortening the ejection stroke of the ejection cylinder and increasing the clamping force; and controls the synchronous ejection when the clamping assembly is opened through a control system, thereby increasing the injection volume of each mold by 1 / 4 compared with a traditional drip irrigation sheet special injection molding machine; increases the number of drip irrigation sheets produced per cycle, thereby improving the overall shipment volume; since the mold can produce more drip irrigation sheets each time, the overall production cycle is effectively shortened, thereby improving the overall operation efficiency and output of the production line.

[0048] It should be noted that the present invention also includes other components or systems that can complete the functions of the injection molding machine, which will not be elaborated in this application.

[0049] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. For ordinary technicians in this field, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. An injection molding machine dedicated to drip irrigation tablets, comprising a frame and an injection component and a mold clamping component arranged on the frame; characterized in that, The mold clamping assembly includes a mold clamping head plate, a second mold clamping plate, and a mold clamping tail plate that are movably connected through guide columns. The mold clamping head plate is fixed on the machine frame, and the mold clamping tail plate is drivingly connected to the second mold clamping plate through a mold clamping driving assembly. An injection cavity for accommodating an injection mold is provided between the second mold clamping plate and the mold clamping head plate. A knockout oil cylinder assembly and a knockout plate assembly are provided on the second mold clamping plate. The four guide columns are respectively and parallelly distributed at the four corners of the mold clamping head plate, the second mold clamping plate, and the mold clamping tail plate. The distance between the guide columns between two guide columns in the same plane is 670 - 790 mm. The knockout oil cylinder assembly includes an oil cylinder body and a knockout piston rod slidably disposed inside the oil cylinder body. The maximum knockout stroke of the knockout oil cylinder is 80 mm.

2. The special injection molding machine for drip irrigation sheets according to claim 1, characterized in that, Guide holes for passing through the guide columns are respectively provided at the four corners of the second mold clamping plate, and two guide column strengthening sleeves are respectively and spacedly distributed in the guide holes. The guide column strengthening sleeves are stuck on the inner wall of the guide holes and sleeved on the outer periphery of the guide columns.

3. The special injection molding machine for drip irrigation sheets according to claim 2, wherein, The knockout plate assembly is drivingly connected to the knockout oil cylinder and is used for the knockout operation after the drip irrigation sheet is injection molded. It includes a knockout plate installed on the second mold clamping plate, a central knockout rod installed on the knockout plate and drivingly connected to the knockout piston rod, and knockout guide rods spacedly distributed around the central knockout rod.

4. The special injection molding machine for drip irrigation sheets according to claim 2, characterized in that, The mold clamping driving assembly includes a mold clamping oil cylinder and a hook hinge assembly that are drivingly connected. The mold clamping tail plate is drivingly connected to the second mold clamping plate through the hook hinge assembly. The hook hinge assembly includes a first hook hinge and a second hook hinge that are rotatably connected. A first E-shaped mounting portion is provided on the mold clamping tail plate, and a second E-shaped mounting portion is provided on the second mold clamping plate. The mutually remote ends of the first hook hinge and the second hook hinge are respectively connected to the first E-shaped mounting portion and the second E-shaped mounting portion. A plurality of reinforcing ribs corresponding to the ribs of the second E-shaped mounting portion are provided on the top of the second mold clamping plate.

5. The special injection molding machine for drip irrigation sheets according to claim 4, wherein, The upper surface of the reinforcing rib is inclined downward along the advancing direction of the second mold clamping plate, and an arc-shaped extension portion that extends in a horn shape circumferentially is provided at its end.

6. The special injection molding machine for drip irrigation sheets according to claim 5, characterized in that, A mold clamping force adjusting assembly is provided on the mold clamping tail plate. The mold clamping force adjusting assembly includes a mold clamping large gear, a mold clamping nut, and a mold clamping motor installed on the outer surface of the mold clamping tail plate. The mold clamping large gear is installed at the center of the mold clamping tail plate, and the four mold clamping nuts are distributed at the four corners of the mold clamping tail plate and meshed with the mold clamping large gear for driving. The mold clamping motor is disposed below the mold clamping large gear, and its output shaft is meshed with the mold clamping large gear for driving.

7. The special injection molding machine for drip irrigation sheets according to claim 6, characterized in that, An eccentric roller seat is provided on the mold clamping tail plate, and the eccentric roller seat is located inside the mold clamping large gear and is in rolling connection with the inner wall of the mold clamping large gear.

8. The special injection molding machine for drip irrigation sheets according to claim 7, characterized in that, The mold clamping force of the mold clamping assembly is 380T - 430T.

9. The special injection molding machine for drip irrigation sheets according to claim 8, wherein It further includes a control system. The control system is electrically connected to the knockout oil cylinder and the mold clamping oil cylinder, and when the control system controls the mold clamping oil cylinder to open the mold through the hook hinge assembly after injection molding is completed, the knockout oil cylinder synchronously drives the central knockout rod and the knockout guide rods to perform the knockout operation.

10. The special injection molding machine for drip irrigation sheets according to claim 1, characterized in that, The injection assembly includes an injection platform and a melting cylinder installed on the injection platform, an injection screw located inside the melting cylinder, and an injection oil cylinder drivingly connected to the injection screw. The length-diameter ratio of the injection screw is 24:1.

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