Vacuum exhaust structure at the end of the barrel
By designing the exhaust port and vacuum exhaust mechanism on the sealing cover at the tail of the injection molding machine, the problem of the vacuum exhaust structure of the barrel is easily blocked, ensuring smooth gas discharge and product quality improvement.
Patent Information
- Application Number
- CN202421473452.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-06-26
AI Technical Summary
The vacuum exhaust structure of the existing injection molding machine barrel is easily blocked by materials, resulting in blockage of exhaust pipes and safety hazards.
A vacuum exhaust structure at the tail of the barrel is designed. By opening an exhaust port on the sealing cover and connecting the vacuum exhaust mechanism, the gas in the barrel can be discharged smoothly.
It effectively avoids the problem of poor gas emissions in the barrel, improves product quality, and reduces safety hazards.
Smart Images
Figure CN222727306U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection molding machines, in particular to a vacuum exhaust structure at the tail of a barrel. Background Art
[0002] The existing vacuum exhaust barrels used in injection molding machines all have exhaust holes directly opened on the barrel, and the exhaust pipes are connected to the exhaust holes by welding. During use, the exhaust holes are easily blocked by the injection molded materials, which is not convenient for cleaning. If the exhaust pipes are blocked, it is easy to cause the exhaust holes to burst, posing certain safety hazards. Utility Model Content
[0003] 1. Technical issues to be resolved
[0004] The technical problem to be solved by the utility model is to provide a vacuum exhaust structure at the tail end of the barrel, wherein a sealing cover is connected to the tail end of the barrel to ensure the vacuum degree of the vacuum chamber, an exhaust port is opened on the sealing cover, and a vacuum exhaust mechanism is connected to the exhaust port, so that the gas in the barrel can be extracted to discharge the gas smoothly, thereby ensuring the quality of the product.
[0005] (II) Technical solution
[0006] The solution adopted by the utility model to solve the above-mentioned technical problems is a vacuum exhaust structure at the tail end of a barrel, comprising a barrel, the barrel being used to transport the melt; a cavity being arranged inside the barrel; a feeding screw being adapted to be arranged in the cavity, and the feeding screw being capable of rotating around its own central axis; the barrel being provided with a feed port communicating with the cavity for supplying materials to enter the barrel, the cavity being located at both ends of the feed port forming a feeding cavity and a vacuum cavity, and the barrel being provided with an injection port communicating with the feeding cavity at one end along its length direction, and an open end for the feeding screw to penetrate at the other end of the barrel, a sealing cover being assembled on the open end, and an opening for adapting the feeding screw being arranged inside the sealing cover, an exhaust port being arranged on the sealing cover communicating with the opening cavity, and the exhaust port being connected to a vacuum exhaust mechanism.
[0007] By adopting the above scheme, a sealing cover is connected to the tail end of the barrel to ensure the vacuum degree of the vacuum chamber. An exhaust port is opened on the sealing cover, and a vacuum exhaust mechanism is connected to the exhaust port, so that the gas in the barrel can be extracted to discharge the gas smoothly, thereby ensuring the quality of the product.
[0008] In some embodiments, a first sealing ring is provided at one end of the opening away from the barrel; the outer wall of the first sealing ring abuts against the inner wall of the opening, and the first sealing ring is provided with a through hole for adapting to the feeding screw.
[0009] In some embodiments, the feeding screw includes a feeding portion with a spiral structure at the outer end, and a round shaft portion connected to the feeding portion. The round shaft portion is adapted to be in the opening of the sealing cover and can be adapted to the first sealing ring, and pass through the through hole to the outside and be connected to the driving mechanism to enable the feeding screw to rotate around its own central axis.
[0010] By adopting the above solution, the provision of the first sealing ring can improve the vacuum degree in the vacuum chamber, thereby ensuring the vacuuming effect of the vacuum pumping mechanism.
[0011] In some embodiments, the edge of the opening at one end away from the barrel extends inward to form an extension wall; the edge of the first sealing ring at one end away from the barrel located at the perforation extends outward to form a sealing inner lip, and the outer periphery of the first sealing ring at one end away from the barrel extends outward to form a sealing outer lip; the sealing outer lip abuts against the extension wall.
[0012] By adopting the above scheme, the setting of the inner sealing lip can improve the sealing between the feeding screw and the first sealing ring; the setting of the outer sealing lip can improve the sealing between the first sealing ring and the sealing cover.
[0013] In some embodiments, an annular groove is provided at one end of the sealing cover facing the barrel, a second sealing ring is provided in the annular groove, and one end of the second sealing ring abuts against the barrel.
[0014] By adopting the above scheme, the provision of the second sealing ring can improve the sealing between the sealing cover and the barrel, thereby ensuring the vacuum degree in the vacuum chamber, thereby ensuring the vacuum effect of the vacuum pumping mechanism.
[0015] In some embodiments, the sealing cover is provided with a planar mounting end surface around the exhaust port to facilitate the installation between the vacuum pumping mechanism and the sealing cover.
[0016] In some embodiments, the sealing cover is fixed to the barrel by screws.
[0017] In some embodiments, a sealing mechanism is connected to the feed port to ensure the vacuum degree in the vacuum chamber.
[0018] In some embodiments, the barrel is provided with two recesses at both ends of the feed port along its length direction, and a third sealing ring is provided in the two recesses to improve the installation sealing between the barrel and the sealing mechanism to ensure the vacuum degree in the vacuum chamber.
[0019] (III) Beneficial effects
[0020] Compared with the prior art, the utility model designs a vacuum exhaust structure at the tail end of the barrel, in which a sealing cover is connected to the tail end of the barrel to ensure the vacuum degree of the vacuum chamber, an exhaust port is opened on the sealing cover, and a vacuum exhaust mechanism is connected to the exhaust port, so that the gas in the barrel can be extracted to discharge the gas smoothly, thereby ensuring the quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in 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 paying creative work.
[0022] Figure 1 It is a structural schematic diagram of the vacuum exhaust structure at the tail of the barrel of the utility model;
[0023] Figure 2 for Figure 1 The enlarged schematic diagram at A in the middle;
[0024] Figure 3 for Figure 1 The enlarged schematic diagram of point B in the middle;
[0025] Figure 4 It is a cross-sectional view of the vacuum exhaust structure at the rear of the barrel of the utility model;
[0026] Figure 5 for Figure 4 The enlarged schematic diagram at C in the middle;
[0027] Figure 6 for Figure 4 The enlarged schematic diagram at D in the middle;
[0028] Figure 7 This is an exploded view of the vacuum exhaust structure at the rear of the barrel of the utility model;
[0029] Figure 8 for Figure 7 The enlarged schematic diagram at E in the middle;
[0030] Fig. 9 It is a structural schematic diagram of the sealing cover of the utility model.
[0031] The names of the components corresponding to the various figure marks in the figure are: 100, barrel; 101, cavity; 101a, feeding cavity; 101b, vacuum cavity; 102, feed port; 103, injection port; 104, opening end; 105, recess; 200, feeding screw; 201, feeding part; 202, circular shaft part; 300, sealing cover; 301, opening; 302, exhaust port; 303, extension wall; 304, annular groove; 305, mounting end face; 400, first sealing ring; 401, perforation; 402, sealing inner lip; 403, sealing outer lip; 500, third sealing ring; 600, second sealing ring. DETAILED DESCRIPTION
[0032] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.
[0033] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0034] The following describes the implementation methods 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 implementation methods, 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 following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.
[0035] 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 the present 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 the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.
[0036] 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 drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.
[0037] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.
[0038] The technical solutions provided by various embodiments of the present application are described below in conjunction with the accompanying drawings.
[0039] like Figure 1-Figure 9As shown, the utility model provides a vacuum exhaust structure at the tail of a barrel, including a barrel 100, the barrel 100 is used to transport the melt; a cavity 101 is arranged inside the barrel 100; a feeding screw 200 is adapted to be arranged inside the cavity 101, and the feeding screw 200 can rotate around its own central axis; the barrel 100 is provided with a feed port 102 which is communicated with the cavity 101 for feeding materials into the barrel 100, and the cavity 101 is located at both ends of the feed port 102 to form a feeding cavity 101a and a vacuum cavity 101a. 01b, and, the barrel 100 is provided with an injection port 103 communicating with the feeding cavity 101a at one end along its length direction, and the other end of the barrel 100 is provided with an open end 104 for the feeding screw 200 to penetrate, and a sealing cover 300 is assembled on the open end 104, and, the sealing cover 300 is provided with an opening 301 for adapting the feeding screw 200, and the sealing cover 300 is provided with an exhaust port 302 communicating with the opening 301, and the exhaust port 302 is connected to a vacuum pumping mechanism. With the above scheme, the sealing cover 300 is connected to the tail end of the barrel 100 to ensure the vacuum degree of the vacuum cavity 101b, and the exhaust port 302 is provided on the sealing cover 300, and the exhaust port 302 is connected to the vacuum pumping mechanism, so that the gas in the barrel 100 can be extracted to discharge the gas smoothly, thereby ensuring the quality of the product.
[0040] In some embodiments, a first sealing ring 400 is provided at one end of the opening 301 away from the barrel 100; the outer wall of the first sealing ring 400 abuts against the inner wall of the opening 301, and the first sealing ring 400 is provided with a through hole 401 for fitting the feeding screw 200. In some embodiments, the feeding screw 200 includes a feeding portion 201 with a spiral structure at the outer end, and a round shaft portion 202 connected to the feeding portion 201 in a round shaft shape, the round shaft portion 202 is fitted in the opening 301 of the sealing cover 300, and can fit with the first sealing ring 400, and pass through the through hole 401 to the outside, and connect with the driving mechanism, so that the feeding screw 200 can rotate around its own central axis. With the above scheme, the provision of the first sealing ring 400 can improve the vacuum degree in the vacuum chamber 101b, thereby ensuring the vacuum effect of the vacuum pumping mechanism. In some embodiments, the edge of the end of the opening 301 away from the barrel 100 extends inward to form an extension wall 303; the edge of the end of the first sealing ring 400 away from the barrel 100 at the edge of the through hole 401 extends outward to form a sealing inner lip 402, and the outer periphery of the end of the first sealing ring 400 away from the barrel 100 extends outward to form a sealing outer lip 403; the sealing outer lip 403 abuts against the extension wall 303. With the above solution, the provision of the sealing inner lip 402 can improve the sealing between the feeding screw 200 and the first sealing ring 400; the provision of the sealing outer lip 403 can improve the sealing between the first sealing ring 400 and the sealing cover 300. In some embodiments, the sealing cover 300 is provided with an annular groove 304 at one end facing the barrel 100, and a second sealing ring 600 is provided in the annular groove 304, and one end of the second sealing ring 600 abuts against the barrel 100. By adopting the above solution, the second sealing ring 600 can improve the sealing between the sealing cover 300 and the barrel 100, thereby ensuring the vacuum degree in the vacuum chamber 101b, thereby ensuring the vacuum pumping effect of the vacuum pumping mechanism. In some embodiments, the sealing cover 300 is provided with a flat mounting end surface 305 around the exhaust port 302 to facilitate the installation between the vacuum pumping mechanism and the sealing cover 300. In some embodiments, the sealing cover 300 is fixed to the barrel 100 by screws.
[0041] In some embodiments, a sealing mechanism is connected to the feed port 102 to ensure the vacuum degree in the vacuum chamber 101b. In some embodiments, the barrel 100 is provided with two recesses 105 at both ends of the feed port 102 along its length direction, and a third sealing ring 500 is provided in the two recesses 105 to improve the installation sealing between the barrel 100 and the sealing mechanism to ensure the vacuum degree in the vacuum chamber 101b.
[0042] The same and similar parts between the various embodiments in this specification can be referenced to each other, and each embodiment focuses on the differences from other embodiments.
[0043] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.
Claims
1. A vacuum exhaust structure at the rear of a barrel, comprising a barrel (100), wherein the barrel (100) is used to transport a melt; characterized in that: The barrel (100) is provided with a cavity (101) inside; a feeding screw (200) is adapted to be arranged inside the cavity (101), and the feeding screw (200) is capable of rotating around its own central axis; the barrel (100) is provided with a feeding port (102) communicating with the cavity (101) for feeding materials into the barrel (100); the cavity (101) is provided with a feeding cavity (101a) and a vacuum cavity (101b) at both ends of the feeding port (102); and the barrel (100) is provided with a vacuum cavity (101a) and a vacuum cavity (101b) along a longitudinal direction thereof. An injection port (103) communicating with the feeding cavity (101a) is provided at one end of the barrel (100), an opening end (104) for the feeding screw (200) to penetrate is provided at the other end of the barrel (100), a sealing cover (300) is assembled on the opening end (104), and an opening cavity (301) for adapting to the feeding screw (200) is provided in the sealing cover (300), an exhaust port (302) communicating with the opening cavity (301) is provided on the sealing cover (300), and the exhaust port (302) is connected to a vacuum exhaust mechanism.
2. The vacuum exhaust structure at the rear of the barrel according to claim 1, characterized in that: A first sealing ring (400) is provided at one end of the opening cavity (301) away from the barrel (100); the outer wall of the first sealing ring (400) abuts against the inner wall of the opening cavity (301), and the first sealing ring (400) is provided with a through hole (401) for adapting to the feeding screw (200).
3. The vacuum exhaust structure at the rear of the barrel according to claim 2, characterized in that: The edge of the opening cavity (301) at one end away from the barrel (100) extends inward to form an extension wall (303); the edge of the through hole (401) at one end of the first sealing ring (400) away from the barrel (100) extends outward to form a sealing inner lip (402), and the outer periphery of the first sealing ring (400) at one end away from the barrel (100) extends outward to form a sealing outer lip (403); the sealing outer lip (403) abuts against the extension wall (303).
4. The vacuum exhaust structure at the rear of the barrel according to claim 1, characterized in that: An annular groove (304) is provided at one end of the sealing cover (300) facing the barrel (100), a second sealing ring (600) is provided in the annular groove (304), and one end of the second sealing ring (600) abuts against the barrel (100).
5. The vacuum exhaust structure at the rear of the barrel according to claim 1, characterized in that: The sealing cover (300) is provided with a planar mounting end surface (305) located around the exhaust port (302).
6. The vacuum exhaust structure at the rear of the barrel according to claim 1, characterized in that: The sealing cover (300) is fixed to the barrel (100) by means of screws.
7. The vacuum exhaust structure at the rear of the barrel according to claim 1, characterized in that: The feed port (102) is connected with a sealing mechanism.
8. The vacuum exhaust structure at the rear of the barrel according to claim 1, characterized in that: The barrel (100) is provided with two recesses (105) at both ends of the feed port (102) along its length direction, and third sealing rings (500) are provided in the two recesses (105).