Injection charging barrel mounting structure of injection molding machine

Abstract

The utility model discloses an injection charging barrel mounting structure of an injection molding machine, which comprises an injection charging barrel and a charging barrel seat, a limiting convex part is arranged on the injection charging barrel, and the injection charging barrel mounting structure is characterized in that a concave positioning mounting cavity is arranged in the charging barrel seat, and the injection charging barrel is positioned and mounted in the positioning mounting cavity; the limiting convex part is arranged behind the front supporting wall of the charging barrel seat and is limited by the front supporting wall of the charging barrel seat, the limiting convex part is fixedly connected with the front supporting wall of the charging barrel seat, and the injection end of the injection charging barrel forwards extends out of the front supporting wall of the charging barrel seat and is arranged outside the charging barrel seat. The device has the advantages that the structure is simple, and the axial thrust transmitted from the injection charging barrel is borne and digested through the charging barrel seat, so that the stability and the safety of the whole structure are improved.

Description

Technical Field

[0001] The utility model relates to an injection molding machine, in particular to an injection barrel installation structure of the injection molding machine. Background Art

[0002] The injection mechanism of the currently existing injection molding machine is conventionally composed of an injection barrel and a barrel seat. The injection barrel is arranged on the barrel seat and supported by the barrel seat. A positioning ring and a positioning block are arranged on the barrel seat. A limiting convex portion is arranged on the injection barrel. The positioning ring and the positioning block are respectively arranged in front and behind the limiting convex portion to play a limiting role. The positioning ring is sleeved on the injection barrel and limitedly arranged in front of the limiting convex portion, and is fixedly connected to the barrel seat by screws. The following problems exist in the installation method of the injection barrel of this structure: (1) When the machine is running, the injection pressure will be transmitted to the positioning ring and the screws used to fix the positioning ring to the barrel seat through the injection barrel. The positioning ring will be deformed under the impact of long-term high loads. In addition, the working temperature of the injection barrel is relatively high, and the mechanical properties of the material will drop significantly at high temperatures, which will further aggravate the stress deformation of the positioning ring; (2) The positioning ring is locked on the barrel seat by screws. During injection, the screws will be pulled under the impact force for a long time and are prone to breakage, causing danger; (3) Regarding the installation position of the positioning ring, due to the presence of the positioning ring, the heating ring cannot be installed here, so the material temperature in this section will be affected, which will have a certain impact on the injection process and product quality. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide an injection barrel installation structure of an injection molding machine with stable structure and safe use.

[0004] The technical solution adopted by the utility model to solve the above technical problems is:

[0005] An injection barrel mounting structure of an injection molding machine comprises an injection barrel and a barrel seat, wherein the injection barrel is provided with a limiting protrusion, and the barrel seat is provided with a concave positioning mounting cavity, the injection barrel is positioned and mounted in the positioning mounting cavity, the limiting protrusion is arranged behind the front supporting wall of the barrel seat and is limited by the front supporting wall of the barrel seat, the limiting protrusion is fixedly connected to the front supporting wall of the barrel seat, and the injection tip of the injection barrel extends forwardly from the front supporting wall of the barrel seat and is arranged outside the barrel seat.

[0006] The injection barrel is a two-stage structure, including a front barrel and a rear barrel, the rear end of the front barrel is provided with a circular first connecting flange, the front end of the rear barrel is provided with a circular second connecting flange, the first connecting flange and the second connecting flange are butted to achieve the connection between the front barrel and the rear barrel and form the limiting convex part. The structure is simple, and the segmented barrel can be used for products made of magnesium alloy. At the same time, the limiting convex part is directly formed by the butt joint of the first connecting flange and the second connecting flange, and no additional setting and manufacturing are required, which saves costs.

[0007] A positioning recess with an upper opening is recessed on the front support wall of the barrel seat, and the injection end of the injection barrel extends from the positioning recess and is arranged outside the barrel seat, so as to facilitate the installation of the injection barrel.

[0008] The position-limiting protrusion is protruding forward and is provided with an annular positioning ring, the bottom end face of the positioning recess is an arc-shaped end face matched with the positioning ring, the positioning ring extends forward and is arranged in the positioning recess, and the bottom of the positioning ring is in contact with the bottom end face of the positioning recess. Through the cooperation of the positioning ring and the positioning recess, stable positioning installation and positioning support between the barrel seat and the injection barrel are achieved.

[0009] The limiting convex part and the front supporting wall of the barrel seat are fixed by screws. The structure is simple, the connection is stable and the assembly and disassembly are convenient. After the two are fixed by screws, the front end face of the limiting convex part and the rear end face of the front supporting wall of the barrel seat are fitted and installed. During injection, the thrust of the injection barrel in the axial direction will be directly transmitted to the barrel seat without affecting the screws, which can greatly improve the safety of the overall structure and the service life of the parts.

[0010] The positioning and installation cavity is provided with a positioning seat for positioning and supporting the tail end of the injection barrel. The tail of the injection barrel is arranged in the positioning seat. A pressure plate is detachably arranged on the positioning seat. The pressure plate is pressed above the tail of the injection barrel. The positioning seat is used to stably support the tail of the injection barrel, and the pressure plate is used to stably install the injection barrel in the barrel seat.

[0011] The positioning seat has a positioning cavity that is recessed downwards, and the tail of the injection barrel is positioned in the positioning cavity, so that a stable installation position is provided for the tail of the injection barrel.

[0012] The two opposite sides of the tail of the injection barrel are provided with vertical pre-positioning flat end faces, and the two opposite inner end faces of the positioning cavity are flat end faces that match the pre-positioning flat end faces. After installation, one of the pre-positioning flat end faces fits with the corresponding inner end face of the positioning cavity. The pre-positioning installation of the injection barrel in the barrel seat is achieved by matching the pre-positioning flat end faces with the inner end faces of the positioning cavity which are also flat end faces, so as to determine the installation direction.

[0013] Compared with the prior art, the advantages of the utility model are: simple structure, the injection barrel is directly installed in the barrel seat, and the front support wall of the barrel seat plays a role in limiting the installation of the limiting protrusion on the injection barrel. In the actual working process, the axial thrust borne by the injection barrel is directly transmitted to the barrel seat, and the barrel seat takes on and digests the transmitted axial thrust, thereby improving the stability and safety of the overall structure; and the thickness of the limiting protrusion in the front and rear directions can be shortened as much as possible, so that a ceramic heating ring with a smaller thickness can be used to heat this part to ensure the process requirements and minimize the impact on product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0015] Figure 2 It is a schematic diagram of the exploded structure of the utility model;

[0016] Figure 3 It is a cross-sectional structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0018] As shown in the figure, an injection barrel installation structure of an injection molding machine includes an injection barrel 1 and a barrel seat 2. A limiting protrusion 3 is provided on the injection barrel 1, and a concave positioning installation cavity 21 is provided in the barrel seat 2. The injection barrel 1 is positioned and installed in the positioning installation cavity 21. The limiting protrusion 3 is arranged behind the front support wall 22 of the barrel seat 2 and is limited by the front support wall 22 of the barrel seat 2. The limiting protrusion 3 is fixedly connected to the front support wall 22 of the barrel seat 2, and the injection end of the injection barrel 1 extends forward from the front support wall 22 of the barrel seat 2 and is arranged outside the barrel seat 2.

[0019] In this specific embodiment, the injection barrel 1 is a two-stage structure, including a front barrel 101 and a rear barrel 102, the rear end of the front barrel 101 is provided with a circular first connecting flange 301, the front end of the rear barrel 102 is provided with a circular second connecting flange 302, the first connecting flange 301 and the second connecting flange 302 are butted to realize the connection between the front barrel 101 and the rear barrel 102 and form a limiting convex portion 3. The structure is simple, and the segmented barrel can be used for products made of magnesium alloy. At the same time, the limiting convex portion 3 is directly formed by the butt joint of the first connecting flange 301 and the second connecting flange 302, and no additional setting and manufacturing are required, which saves costs.

[0020] In this specific embodiment, a positioning recess 221 with an upper opening is recessed on the front support wall 22 of the cartridge seat 2, and the injection tip of the injection cartridge 1 extends from the positioning recess 221 and is disposed outside the cartridge seat 2, so as to facilitate the installation of the injection cartridge 1.

[0021] In this specific embodiment, the limiting protrusion 3 is provided with an annular positioning ring 31 protruding forward, the bottom end surface of the positioning recess 221 is an arc-shaped end surface matched with the positioning ring 31, the positioning ring 31 extends forward and is set in the positioning recess 221, and the bottom of the positioning ring 31 is in contact with the bottom end surface of the positioning recess 221. Through the cooperation of the positioning ring 31 and the positioning recess 221, stable positioning installation and positioning support between the barrel seat 2 and the injection barrel 1 are achieved.

[0022] In this specific embodiment, the limiting protrusion 3 is locked and fixed to the front support wall 22 of the barrel seat 2 by screws 10. The structure is simple, the connection is stable and the assembly and disassembly are convenient. After the two are locked and fixed by screws 10, the front end surface of the limiting protrusion 3 and the rear end surface of the front support wall 22 of the barrel seat 2 are fitted and installed. During injection, the thrust of the injection barrel 1 in the axial direction will be directly transmitted to the barrel seat 2, and will not affect the screws 10, which can greatly improve the safety of the overall structure and the service life of the components.

[0023] In this specific embodiment, a positioning seat 23 for positioning and supporting the tail end of the injection barrel 1 is provided in the positioning and installation cavity 21, the tail of the injection barrel 1 is arranged in the positioning seat 23, and a pressing plate 4 is detachably provided on the positioning seat 2, and the pressing plate 4 is pressed above the tail of the injection barrel 1. The positioning seat 23 realizes stable support for the tail of the injection barrel 1, and the pressing plate 4 cooperates with the injection barrel 1 to realize stable installation in the barrel seat 2.

[0024] In this specific embodiment, the positioning seat 23 has a positioning cavity 231 that is recessed downward, and the tail of the injection barrel 1 is positioned in the positioning cavity 231. The positioning cavity 231 provides a stable installation position for the tail of the injection barrel 1.

[0025] In this specific embodiment, vertical pre-positioning flat end faces 11 are provided on opposite sides of the tail of the injection barrel 1, and the two opposite inner end faces of the positioning cavity 231 are flat end faces that match the pre-positioning flat end faces 11. After installation, one pre-positioning flat end face 11 fits with the inner end face of the corresponding positioning cavity 231. The pre-positioning installation of the injection barrel 1 in the barrel seat 2 is achieved by matching the pre-positioning flat end face 11 with the inner end face of the positioning cavity 231, which is also a flat end face, to determine the installation direction.

Claims

1. An injection barrel installation structure of an injection molding machine, comprising an injection barrel and a barrel seat, wherein a limited position convex portion is provided on the injection barrel, characterized in that A concave positioning and mounting cavity is provided in the barrel seat, and the injection barrel is positioned and mounted in the positioning and mounting cavity. The limiting protrusion is provided behind the front supporting wall of the barrel seat and is limited by the front supporting wall of the barrel seat. The limiting protrusion is fixedly connected to the front supporting wall of the barrel seat, and the injection tip of the injection barrel extends forward from the front supporting wall of the barrel seat and is provided outside the barrel seat.

2. The injection barrel installation structure of an injection molding machine as claimed in claim 1, characterized in that The injection barrel is a two-stage structure, including a front barrel and a rear barrel. The rear end of the front barrel is provided with a circular first connecting flange, and the front end of the rear barrel is provided with a circular second connecting flange. The first connecting flange and the second connecting flange are butt-jointed to realize the connection between the front barrel and the rear barrel and form the limiting protrusion.

3. The injection barrel installation structure of an injection molding machine according to claim 1, characterized in that A positioning recess with an upper opening is recessed on the front support wall of the barrel seat, and the injection end of the injection barrel extends out from the positioning recess and is arranged outside the barrel seat.

4. The injection barrel installation structure of an injection molding machine as claimed in claim 3, characterized in that The limiting protrusion protrudes forward and is provided with an annular positioning ring, the bottom end face of the positioning recess is an arc-shaped end face matching the positioning ring, the positioning ring extends forward and is arranged in the positioning recess, and the bottom of the positioning ring is in contact with the bottom end face of the positioning recess.

5. The injection barrel installation structure of an injection molding machine as claimed in claim 1, characterized in that The limiting protrusion is fixed to the front supporting wall of the barrel seat by means of screws.

6. The injection barrel installation structure of an injection molding machine as claimed in claim 1, characterized in that A positioning seat for positioning and supporting the tail end of the injection barrel is arranged in the positioning installation cavity, the tail of the injection barrel is arranged in the positioning seat, and a pressure plate is detachably arranged on the positioning seat, and the pressure plate is pressed above the tail of the injection barrel.

7. The injection barrel installation structure of an injection molding machine as claimed in claim 6, characterized in that The positioning seat has a positioning cavity which is recessed downwards, and the tail of the injection barrel is positioned and arranged in the positioning cavity.

8. The injection barrel installation structure of an injection molding machine as claimed in claim 7, characterized in that The opposite sides of the tail of the injection barrel are provided with vertical pre-positioning flat end surfaces, and the two opposite inner end surfaces of the positioning cavity are flat end surfaces matching the pre-positioning flat end surfaces. After installation, one of the pre-positioning flat end surfaces fits with the corresponding inner end surface of the positioning cavity.

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