Vertical low-pressure injection molding machine

Abstract

The utility model provides a vertical low-pressure injection molding machine which comprises a rack, a mold pressing plate, a material nozzle floating plate and an injection molding barrel, a positioning seat is arranged on a workbench of the rack, and an injection molding mold is positioned and mounted on the positioning seat; the mold pressing plate is mounted above the positioning seat in a lifting manner and is used for pressing the injection mold during injection molding; the material nozzle floating plate is installed above the die pressing plate in a lifting mode, and a driving piece is installed on the material nozzle floating plate. The injection molding material cylinder is installed on the material nozzle floating plate, the lower end of the injection molding material cylinder is provided with a material injection nozzle, and the material injection nozzle penetrates through the mold pressing plate and is arranged on the lower side of the mold pressing plate; the upper end of the injection molding material cylinder is connected with a material pushing air cylinder, and a material pushing rod of the material pushing air cylinder is arranged in the injection molding material cylinder; the vertical low-pressure injection molding machine overcomes the defects that an existing injection molding machine is high in pressure and poor in injection molding quality, and the injection nozzle is prone to glue leakage.

Description

Technical Field

[0001] The utility model relates to the field of injection molding machines, in particular to a vertical low-pressure injection molding machine. Background Art

[0002] Injection molding machines are important equipment in the plastics processing industry and play a key role in the production of plastic products. Traditional injection molding machines mainly include horizontal injection molding machines and vertical injection molding machines. Vertical injection molding machines have their own characteristics and application scenarios. Although the technology of vertical injection molding machines is constantly developing and improving, the following problems still exist: 1) Existing vertical injection molding machines are generally provided with a positioning seat for positioning and installing the injection mold, but there is no clamping structure on it. The injection mold is easy to shift during injection molding, affecting the injection molding quality; 2) During injection molding, the injection nozzle of the injection molding machine needs to be placed against the material port of the injection mold, and the pressure between the injection nozzle and the injection mold is relatively small, which can easily cause glue leakage, resulting in waste and affecting the injection molding quality of the injection molding machine; 3) Existing vertical injection molding machines generally use screw extrusion, which has a high extrusion pressure and is not suitable for low-pressure molding products. In addition, it has high energy consumption and is not conducive to environmental protection. Utility Model Content

[0003] (1) Technical issues to be solved

[0004] The problem to be solved by the utility model is to provide a vertical low-pressure injection molding machine to overcome the defects of the existing injection molding machine, such as high pressure, poor injection molding quality and easy glue leakage from the injection nozzle.

[0005] (2) Technical solution

[0006] In order to solve the above technical problems, the utility model provides a vertical low-pressure injection molding machine, comprising:

[0007] A frame, a workbench of which is provided with a positioning seat, on which an injection mold is positioned and mounted;

[0008] A pressing plate, which is installed above the positioning seat in a lifting manner and is used to press the injection mold during injection molding;

[0009] A nozzle floating plate is installed above the die plate in a liftable manner; a driving member is installed on the nozzle floating plate, and the driving member is used to drive the nozzle floating plate to move up and down relative to the die plate;

[0010] An injection molding cylinder is mounted on the nozzle floating plate; a nozzle is provided at the lower end of the injection molding cylinder, and a discharge end of the nozzle passes through the die plate and is placed on the lower side thereof; during injection molding, the die plate and the nozzle floating plate move downward together, and the injection molding cylinder is pressed against the injection mold, so that the nozzle floating plate moves upward relative to the die plate, and then the driving member drives the nozzle floating plate to move downward to press the injection molding cylinder onto the injection mold.

[0011] In some embodiments, under normal conditions, the nozzle floating plate is resting against the upper end of the pressing plate; when the pressing plate moves downward, under the action of gravity, the nozzle floating plate moves downward together with the pressing plate; when the pressing plate moves upward, the pressing plate pushes the nozzle floating plate to move upward.

[0012] In some embodiments, first guide posts are provided at the four corners of the die plate, and a plurality of guide sleeves adapted to the first guide posts are provided on the nozzle floating plate. The driving element is a first cylinder, located between two first guide posts on the same side. The telescopic rod of the first cylinder passes through the nozzle floating plate and is connected to the die plate. The upper ends of the two first guide posts on the same side are connected by a connecting plate.

[0013] In some embodiments, the workbench is mounted with a fixed plate below the positioning seat, with second guide posts mounted at the four corners of the fixed plate. A sliding plate is mounted on the second guide posts in a movably movable manner, and the sliding plate is located below the fixed plate. A plurality of third guide posts are provided on the sliding plate, which pass through the fixed plate and the workbench and are connected to the press plate. A second cylinder is mounted on the fixed plate, and the telescopic rod of the second cylinder is connected to the sliding plate. When actuated, the second cylinder drives the sliding plate to move, and the sliding plate drives the press plate to move via the third guide posts.

[0014] In some embodiments, a mounting plate is fixed to the lower end of the second guide column, and the mounting plate is located on the lower side of the sliding plate; an elastic buffer is installed on the mounting plate, and the elastic buffer is used to buffer the sliding plate.

[0015] In some embodiments, a support column is vertically disposed along the upper edge of the nozzle floating plate, and the plastic injection barrel is suspended on the support column via a barrel mounting seat. A push cylinder is connected to the upper end of the plastic injection barrel, and the push rod of the push cylinder is positioned within the plastic injection barrel. The upper end of the push cylinder is mounted on the support column via an upper mounting seat, and the lower end is mounted on the support column via a lower mounting seat.

[0016] In some embodiments, a positioning groove is provided on the positioning seat, and an insertion port for inserting the injection mold is provided at one end of the positioning groove, and the insertion port is trumpet-shaped with a small inner diameter and a large outer diameter; a cooling plate is built into the positioning seat, and the cooling plate is used to accelerate the cooling of the injection mold.

[0017] (3) Beneficial effects

[0018] The utility model provides a vertical low-pressure injection molding machine, which adopts a push cylinder for low-pressure extrusion, can meet the production of products requiring low-pressure molding, and has low energy consumption; it cooperates with a die plate and a nozzle floating plate, and during injection, first the die plate and the nozzle floating plate move downward together, the die plate is pressed tightly on the injection mold, the injection nozzle is placed on the injection mold so that the nozzle floating plate moves upward relative to the die plate, and then the first cylinder drives the nozzle floating plate to move downward to press the injection nozzle against the injection mold; after the injection is completed, the first cylinder drives the nozzle floating plate to move downward to press the injection nozzle against the injection mold; The nozzle floating plate moves upward to separate the shot nozzle from the injection mold, and the pressing plate continues to press on the injection mold for pressure-maintaining cooling; after cooling, the pressing plate drives the nozzle floating plate to move upward together, and the nozzle floating plate is reset; with this structure, the pressing plate is pressed on the injection mold during injection and cooling to prevent it from shifting, with a good limiting effect and guaranteed injection quality; during injection, the nozzle floating plate is driven downward by the first cylinder to press the shot nozzle against the injection mold, so that the shot nozzle is tightly against the injection mold to prevent glue leakage and ensure injection quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. 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 any creative work.

[0020] Figure 1 This is a three-dimensional diagram of a vertical low-pressure injection molding machine of the utility model;

[0021] Figure 2 This is a three-dimensional diagram of a vertical low-pressure injection molding machine from another perspective of the utility model;

[0022] Figure 3 This is a three-dimensional diagram of a vertical low-pressure injection molding machine of the utility model with the frame removed;

[0023] Figure 4 This is a three-dimensional diagram of a vertical low-pressure injection molding machine of the utility model from another perspective after removing the frame;

[0024] Figure 5 This is an exploded view of a vertical low-pressure injection molding machine of the utility model;

[0025] Figure 6 This is a three-dimensional diagram of the connection between the die plate and the nozzle floating plate of a vertical low-pressure injection molding machine of the present invention;

[0026] Figure 7 This is a three-dimensional diagram of the connection between the die plate and the sliding plate of a vertical low-pressure injection molding machine of the present invention;

[0027] Figure 8This is a three-dimensional diagram of the connection between the push cylinder and the injection molding barrel of a vertical low-pressure injection molding machine of the utility model;

[0028] Figure 9 This is a three-dimensional diagram of a positioning seat of a vertical low-pressure injection molding machine of the utility model;

[0029] The names of the components corresponding to the various figure marks in the figure are: 1. Frame; 11. Workbench; 12. Positioning seat; 121. Positioning groove; 122. Insertion port; 2. Pressing plate; 21. First guide column; 22. Connecting plate; 3. Nozzle floating plate; 31. Driving member; 32. Guide sleeve; 33. Support column; 4. Injection molding barrel; 41. Shooting nozzle; 42. Barrel mounting seat; 5. Injection mold; 6. Fixed plate; 61. Second guide column; 62. Second cylinder; 7. Sliding plate; 71. Third guide column; 8. Mounting plate; 9. Pushing cylinder; 91. Pushing rod; 92. Upper mounting seat; 93. Lower mounting seat. DETAILED DESCRIPTION

[0030] The present application is described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0032] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0033] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0034] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples, however, one skilled in the art will appreciate that the examples can be practiced without these specific details.

[0035] The following describes the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0036] See Figures 1 to 9 The utility model provides a vertical low-pressure injection molding machine, which includes a frame 1, a die plate 2, a nozzle floating plate 3 and an injection molding cylinder 4.

[0037] See Figures 1 to 3 A positioning seat 12 is provided on the workbench 11 of the frame 1, and the injection mold 5 is positioned and installed on the positioning seat 12. The die plate 2 can be raised and lowered above the positioning seat 12, and is used to press the injection mold 5 during injection molding. The nozzle floating plate 3 can be raised and lowered above the die plate 2; a driving member 31 is installed on the nozzle floating plate 3, and the driving member 31 is used to drive the nozzle floating plate 3 to rise and fall relative to the die plate 2. The injection molding barrel 4 is installed on the nozzle floating plate 3; a shot nozzle 41 is provided at the lower end of the injection molding barrel 4, and the discharge end of the shot nozzle 41 passes through the die plate 2 and is placed on the lower side of the die plate 2. The die plate 2 is provided with a through hole for the shot nozzle 41 to pass through. This structure ensures that when the die plate 2 and the nozzle floating plate 3 move downward together, the shot nozzle 41 first contacts the injection mold 5. During injection molding, the die plate 2 and the nozzle floating plate 3 move downward together, and the shot nozzle 41 abuts against the injection mold 5, causing the nozzle floating plate 3 to move upward relative to the die plate 2. The driving member 31 then drives the nozzle floating plate 3 downward to press the shot nozzle 41 against the injection mold 5. This structure keeps the die plate pressed against the injection mold during both injection and cooling, preventing displacement and providing a good positioning effect, thereby ensuring injection quality. During injection molding, the nozzle floating plate is driven downward by the first cylinder to press the shot nozzle against the injection mold, tightly abutting the injection mold, preventing glue leakage and ensuring injection quality.

[0038] In some embodiments, as Figure 3 As shown, in normal operation, the nozzle floating plate 3 abuts the upper end of the die plate 2. When the die plate 2 moves downward, gravity forces the nozzle floating plate 3 downward along with the die plate 2. When the die plate 2 moves upward, the die plate 2 pushes the nozzle floating plate 3 upward. This structure offers simple and reliable actuation, ensuring functional reliability while streamlining the structure and reducing manufacturing costs.

[0039] In some embodiments, as Figure 3 、 Figure 5 and Figure 6 As shown, the die plate 2 is equipped with first guide posts 21 at the four corners. The nozzle floating plate 3 is equipped with four guide sleeves 32 that fit over the first guide posts 21 and guide the nozzle floating plate 3 up and down. The driving element 31 is a first pneumatic cylinder located between two first guide posts 21 on the same side. The first cylinder's telescopic rod passes through the nozzle floating plate 3 and connects to the die plate 2. The upper ends of the two first guide posts 21 on the same side are connected by a connecting plate 22. This connecting plate 22 not only ensures the connection strength of the first guide posts 21 but also provides an upper limit for the nozzle floating plate 3, resulting in a highly effective operation.

[0040] In some embodiments, as Figure 4 、 Figure 5 and Figure 7 As shown, the workbench 11 is mounted with a fixed plate 6 below the positioning seat 12. Second guide posts 61 are mounted at the four corners of the fixed plate 6. A sliding plate 7 is mounted on the second guide post 61 in a movably movable manner. The sliding plate 7 is provided with a guide sleeve that matches the second guide post 61. The sliding plate 7 is located below the fixed plate 6. A plurality of third guide posts 71 are provided on the sliding plate 7. The third guide posts 71 pass through the fixed plate 6 and the workbench 11 and are connected to the press plate 2. The fixed plate 6 is provided with a guide sleeve that matches the third guide posts 71. The workbench 11 is provided with a through hole for the third guide posts 71 to pass through.

[0041] In some embodiments, as Figure 7 As shown, a second cylinder 62 is mounted on the fixed plate 6, and the telescopic rod of the second cylinder 62 is connected to the sliding plate 7. When actuated, the second cylinder 62 drives the sliding plate 7, which in turn drives the pressing plate 2 via the third guide post 71. A mounting plate 8 is fixed to the lower end of the second guide post 61, located below the sliding plate 7. An elastic buffer (not shown) is mounted on the mounting plate 8 to cushion the sliding plate 7. The elastic buffer can be a spring buffer. The elastic buffer cushions the sliding plate 7 as it descends, thereby cushioning the shot nozzle 41. This effectively protects the shot nozzle 41 and extends its service life.

[0042] In some embodiments, as Figure 5 and Figure 8As shown, a support column 33 is vertically mounted on the nozzle floating plate 3, and the plastic injection barrel 4 is suspended on the support column 33 via a barrel mounting seat 42. A push cylinder 9 is connected to the upper end of the plastic injection barrel 4, and a push rod 91 of the push cylinder 9 is placed within the plastic injection barrel 4. The upper end of the push cylinder 9 is mounted on the support column 33 via an upper mounting seat 92, and the lower end of the push cylinder 9 is mounted on the support column 33 via a lower mounting seat 93. The plastic injection barrel 4 is provided with a heating structure for melting the material. The heating structure is conventional and will not be described in detail in this embodiment. The push rod 91 is used to push the plastic material in the plastic injection barrel 4 out of the injection nozzle 41. This structure uses a push cylinder for low-pressure extrusion, which can meet the production needs of low-pressure molding products and reduce the energy consumption of the equipment. The energy consumption of this equipment is only one-third of the energy consumption of high-pressure injection molding equipment. This equipment is mainly used for the production of glass tubes. It uses low-pressure injection molding and the impact speed is relatively small. The glass tubes will not cause cracks. In the past, high-pressure screw injection molding machines were used, which easily caused glass tube cracks during injection molding. This solves the problem of glass tube cracking during the injection molding process. In addition, the whole equipment has a simple structure and is easy to operate and maintain.

[0043] In some embodiments, as Figure 9 As shown, the positioning seat 12 is provided with a positioning groove 121. An insertion port 122 for inserting the injection mold 5 is located at one end of the positioning groove 121. The insertion port 122 is trumpet-shaped, with a smaller inner diameter and a larger outer diameter. A cooling plate is built into the positioning seat 12 to accelerate the cooling of the injection mold 5. This structure not only effectively positions the injection mold 5 but also facilitates loading and unloading, making it easy to operate. The cooling plate accelerates product solidification after injection molding, improving injection molding efficiency.

[0044] The use process of this vertical low-pressure injection molding machine is as follows:

[0045] During injection, first the second cylinder 62 drives the sliding plate 7 to move downward, and the sliding plate 7 drives the die plate 2 to move toward the injection mold through the third guide column 71. Under the action of gravity, the nozzle floating plate 3 moves downward together with the die plate 2. At this time, the die plate 2 is pressed tightly against the injection mold 5, and the injection nozzle 41 is placed on the injection mold 5, so that the nozzle floating plate 3 moves upward relative to the die plate 2. Then the first cylinder works and drives the nozzle floating plate 3 to move downward, pressing the injection nozzle 41 against the injection mold 5, and then the injection nozzle 41 moves downward. Rubber is added to the injection mold 5; after the injection is completed, the first cylinder drives the nozzle floating plate 3 to move upward, so that the injection nozzle 41 is separated from the injection mold 5. At this time, the pressing plate 2 continues to be pressed on the injection mold 5 for pressure-maintaining cooling; after cooling, the second cylinder 62 drives the sliding plate 7 to move upward, and the sliding plate 7 drives the pressing plate 2 to move upward through the third guide column 71, and the pressing plate 2 drives the nozzle floating plate 3 to move upward together; finally, the first cylinder stops working, and under the action of gravity, the nozzle floating plate 3 is reset and rests on the pressing plate 2.

[0046] The same or similar parts between the various embodiments in this specification can be referred to each other, and each embodiment focuses on the differences from other embodiments.

[0047] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A vertical low-pressure injection molding machine, characterized in that: include: A frame (1), wherein a positioning seat (12) is provided on a workbench (11), and an injection mold (5) is positioned and mounted on the positioning seat (12); A pressing plate (2) is installed above the positioning seat (12) in a liftable manner and is used to press the injection mold (5) during injection molding; A nozzle floating plate (3) is installed above the die plate (2) in a liftable manner; a driving member (31) is installed on the nozzle floating plate (3), and the driving member (31) is used to drive the nozzle floating plate (3) to move up and down relative to the die plate (2); An injection molding cylinder (4) is mounted on the nozzle floating plate (3); a shot nozzle (41) is provided at the lower end of the injection molding cylinder (4), and a discharge end of the shot nozzle (41) passes through the die plate (2) and is placed on the lower side thereof; during injection molding, the die plate (2) and the nozzle floating plate (3) move downward together, and the shot nozzle (41) abuts against the injection mold (5), so that the nozzle floating plate (3) moves upward relative to the die plate (2), and then the driving member (31) drives the nozzle floating plate (3) to move downward to press the shot nozzle (41) onto the injection mold (5).

2. The vertical low-pressure injection molding machine according to claim 1, characterized in that: First guide posts (21) are provided at the four corners of the press plate (2), and a plurality of guide sleeves (32) adapted to the first guide posts (21) are provided on the nozzle floating plate (3); the driving member (31) is a first cylinder, and the first cylinder is located between two first guide posts (21) on the same side, and a telescopic rod of the first cylinder passes through the nozzle floating plate (3) and is connected to the press plate (2).

3. The vertical low-pressure injection molding machine according to claim 2, characterized in that: The upper ends of the two first guide pillars (21) located on the same side are connected via a connecting plate (22).

4. The vertical low-pressure injection molding machine according to claim 1, characterized in that: The workbench (11) is provided with a fixed plate (6) below the positioning seat (12), and second guide pillars (61) are provided at the four corners of the fixed plate (6). A sliding plate (7) is provided on the second guide pillar (61) so as to be liftable, and the sliding plate (7) is located below the fixed plate (6); a plurality of third guide pillars (71) are provided on the sliding plate (7), and the third guide pillars (71) pass through the fixed plate (6) and the workbench (11) and are connected to the pressing plate (2).

5. The vertical low-pressure injection molding machine according to claim 4, characterized in that: A second cylinder (62) is mounted on the fixed plate (6), and a telescopic rod of the second cylinder (62) is connected to the sliding plate (7); when driven, the second cylinder (62) drives the sliding plate (7) to move, and the sliding plate (7) drives the pressing plate (2) to move via the third guide column (71).

6. The vertical low-pressure injection molding machine according to claim 4, characterized in that: A mounting plate (8) is fixed to the lower end of the second guide column (61), and the mounting plate (8) is located on the lower side of the sliding plate (7); an elastic buffer is installed on the mounting plate (8), and the elastic buffer is used to buffer the sliding plate (7).

7. The vertical low-pressure injection molding machine according to claim 1, characterized in that: A supporting column (33) is vertically provided on the nozzle floating plate (3), and the plastic injection barrel (4) is hoisted on the supporting column (33) via a barrel mounting seat (42).

8. The vertical low-pressure injection molding machine according to claim 7, characterized in that: The upper end of the plastic injection barrel (4) is connected to a push cylinder (9), and a push rod (91) of the push cylinder (9) is placed in the plastic injection barrel (4); the upper end of the push cylinder (9) is mounted on the support column (33) through an upper mounting seat (92), and the lower end of the push cylinder (9) is mounted on the support column (33) through a lower mounting seat (93).

9. The vertical low-pressure injection molding machine according to claim 1, characterized in that: A positioning groove (121) is provided on the positioning seat (12), and an insertion opening (122) for inserting the injection mold (5) is provided at one end of the positioning groove (121), and the insertion opening (122) is in the shape of a trumpet with a small inner diameter and a large outer diameter; a cooling plate is built into the positioning seat (12), and the cooling plate is used to accelerate the cooling of the injection mold (5).

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