Screw type feeding injection mold

Abstract

The utility model provides a spiral feeding injection mold, which relates to the technical field of injection molds and comprises a mold body. The mold body is provided with an injection mold plate in the left-right direction, a threaded hole penetrating front and back is formed in the center of the injection mold plate, an injection sprue bush in the front-back direction is installed on the rear portion of the interior of the threaded hole of the injection mold plate through threads, and a threaded column is arranged in front of the injection sprue bush. A limiting ring plate is arranged on the outer circumference of the rear end of a threaded column of the injection molding sprue bush, a regular hexagonal prism is arranged on the rear end face of the threaded column of the injection molding sprue bush, and a circular truncated cone groove is formed in the rear end face of the regular hexagonal prism of the injection molding sprue bush, so that the injection molding sprue bush is conveniently installed on an injection mold plate through threads and rapidly disassembled and assembled through the threads; the problems that the sprue bush is fixedly installed on a mold plate through a plurality of bolts, so that the disassembly and assembly process of the sprue bush is time-consuming, a thread structure is inconvenient to arrange on the mold plate, and the sprue bush is directly installed through threads are solved.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, and in particular relates to an injection mold with spiral feeding. Background Technology

[0002] Injection molds are specialized tools used in plastic injection molding processes. They are used to inject heated and molten plastic into the mold cavity. The injection methods include plunger and spiral injection. After cooling and solidification, the finished product is obtained. They are widely used in the production of plastic parts and products, and are particularly suitable for mass production of products with complex geometries and high precision requirements, such as automotive parts, electronic casings, home appliances, and toys.

[0003] Based on the above, the inventors have discovered the following shortcomings of existing spiral-feed injection molds:

[0004] 1. The sprue bushing is fixed to the mold plate by multiple bolts, which makes the disassembly and assembly of the sprue bushing time-consuming. It is not convenient to set a threaded structure on the mold plate so that the sprue bushing can be installed directly by the thread.

[0005] 2. The heater is a two-part design and needs to be locked to the feed cylinder with multiple bolts, which makes the disassembly and assembly of the heater cumbersome. It is inconvenient to set the heater as a cylindrical type and install it with limiting measures. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a spiral-feed injection mold to address the issues of existing sprue bushings being fixed to the mold plate with multiple bolts, resulting in a time-consuming disassembly and assembly process, and the inconvenience of setting a threaded structure on the mold plate to allow the sprue bushing to be directly installed via threads; and the heater being a two-part type that requires multiple bolts to be locked to the feed cylinder, resulting in a cumbersome disassembly and assembly process, and the inconvenience of setting the heater as a cylindrical type and installing it with limiting measures.

[0007] The purpose and effect of this spiral-feed injection mold are achieved by the following specific technical means:

[0008] A spiral-feed injection mold includes a mold body; the mold body is provided with a left-right injection mold plate, the injection mold plate has a threaded hole that runs through the front and back at its center, an injection sprue bushing that runs through the front and back is installed inside the threaded hole of the injection mold plate by threads, a threaded post is provided in front of the injection sprue bushing, a limit ring plate is provided on the outer circumference of the rear end of the threaded post of the injection sprue bushing, a regular hexagonal prism is provided on the rear end face of the threaded post of the injection sprue bushing, a frustum groove is provided on the rear end face of the regular hexagonal prism of the injection sprue bushing, and a frustum hole that runs through the front and back is provided on the front end face of the threaded post of the injection sprue bushing.

[0009] Furthermore, the horizontal plate of the injection heater is fitted with an assembly limiting post in the vertical direction via threads. The assembly limiting post has threads on its outer circumference and a regular hexagonal groove on its top end face.

[0010] Furthermore, the limiting ring groove of the spiral feed cylinder is fitted with an injection heater in the front-to-back direction, and the top of the rear end face of the injection heater is provided with a horizontal plate with through-holes at the top and bottom.

[0011] Furthermore, the outer circumference of the rear end of the spiral feed cylinder is threaded, and a regular hexagonal ring plate is provided on the outer circumference of the rear end of the spiral feed cylinder. A threaded hole that runs through the top and bottom is provided on the front top wall of the regular hexagonal ring plate of the spiral feed cylinder, and an insertion blind hole is provided on the top of the outer circumference in front of the threaded hole of the spiral feed cylinder.

[0012] Furthermore, a spiral feed cylinder in the front-to-back direction is threadedly installed on the threaded post of the injection nozzle. The spiral feed cylinder has a threaded annular groove on the inner circumference of the front end and a limiting annular groove on the outer circumference of the front end.

[0013] Furthermore, the front end face of the threaded post of the injection nozzle is provided with a frustum, the rear end face of the threaded post of the injection nozzle is provided with a frustum groove, and the front end face of the frustum of the injection nozzle is provided with a through hole extending from front to back.

[0014] Furthermore, an injection nozzle with a front-to-back direction is inserted into the frustum groove of the injection gate sleeve, a threaded post is provided behind the injection nozzle, and a regular hexagonal ring plate is provided on the outer circumference of the front end of the threaded post of the injection nozzle.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The injection sprue bushing is conveniently installed on the injection mold plate via threads, allowing for quick assembly and disassembly. This solves the problem of sprue bushings being fixed to the mold plate with multiple bolts, which makes the assembly and disassembly process time-consuming and inconvenient, and also makes it difficult to set up a threaded structure on the mold plate for direct threaded installation.

[0017] The design allows the injection heater to be easily fitted onto the outer circumference of the spiral feed cylinder. It also facilitates the assembly of the injection heater onto the spiral feed cylinder via the limiting post. This solves the problem that the heater is a two-part design and requires multiple bolts to be locked onto the feed cylinder, making the disassembly and assembly process cumbersome and inconvenient to design as a cylindrical heater and install it using limiting measures. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0019] Figure 2This is a schematic diagram of the rear view structure of this utility model.

[0020] Figure 3 This is a disassembled structural diagram of the present invention.

[0021] Figure 4 This is a cross-sectional view of the assembly of the injection mold plate and the injection gate sleeve of this utility model.

[0022] Figure 5 This is a cross-sectional view of the assembly of the injection molding gate sleeve and injection nozzle of this utility model.

[0023] Figure 6 This is a cross-sectional view of the assembly of the injection nozzle and the spiral feed cylinder of this utility model.

[0024] In the diagram: 1. Mold body; 2. Injection mold plate; 3. Injection gate bushing; 4. Injection nozzle; 5. Spiral feed cylinder; 6. Injection heater; 7. Assembly limit post. Detailed Implementation

[0025] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0026] Example 1:

[0027] As attached Figure 1 To be continued Figure 6 As shown:

[0028] This utility model provides a spiral-feed injection mold, including a mold body 1; the mold body 1 is provided with a left-right injection mold plate 2 for convenient support of an injection sprue bushing 3; the injection mold plate 2 has a through-hole at its center for convenient threaded installation of the injection sprue bushing 3; the injection sprue bushing 3 is threadedly installed at the rear of the threaded hole in the injection mold plate 2 for convenient docking with an injection nozzle 4; a threaded post is provided at the front of the injection sprue bushing 3 for convenient threaded installation of the injection mold plate 2; a limiting ring plate is provided on the outer circumference of the rear end of the threaded post of the injection sprue bushing 3 for convenient installation limiting; a regular hexagonal prism is provided on the rear end face of the threaded post of the injection sprue bushing 3 for convenient rotation and disassembly using tools; the regular hexagonal prism of the injection sprue bushing 3... The rear end face of the column has a frustum groove to facilitate the insertion and docking of the injection nozzle 4. The front end face of the threaded column of the injection sprue sleeve 3 has a frustum hole that runs through the front and rear to facilitate material passage. The injection nozzle 4, which runs in the front and rear direction, is inserted into the frustum groove of the injection sprue sleeve 3 to facilitate material conveying. A threaded column is provided behind the injection nozzle 4 to facilitate the installation of the spiral feed cylinder 5 by thread. A regular hexagonal ring plate is provided on the outer circumference of the front end of the threaded column of the injection nozzle 4 to facilitate rotation and disassembly using tools. The front end face of the threaded column of the injection nozzle 4 has a frustum to facilitate insertion into the injection sprue sleeve 3. The rear end face of the threaded column of the injection nozzle 4 has a frustum groove to facilitate material gathering. The front end face of the frustum of the injection nozzle 4 has a through hole that runs through the front and rear to facilitate material passage.

[0029] The injection nozzle 4 has a threaded post on which a spiral feed cylinder 5 is threadedly mounted in the front-to-back direction, facilitating the placement of the spiral feed rod inside. The inner circumference of the front end of the spiral feed cylinder 5 has a threaded annular groove for easy threaded installation of the injection nozzle 4. A limiting annular groove is formed on the outer circumference of the front end of the spiral feed cylinder 5 for easy assembly of the injection heater 6. The outer circumference of the rear end of the spiral feed cylinder 5 has threads for easy threaded installation on external components. A regular hexagonal annular plate is provided on the outer circumference of the rear end of the spiral feed cylinder 5 for easy rotation and disassembly using tools. A through-hole threaded hole is formed on the top wall of the front end of the regular hexagonal annular plate of the spiral feed cylinder 5 for easy threaded installation of the hopper. The screw feed cylinder 5 has an insertion blind hole on the top of the outer circumference of the threaded hole, which facilitates the insertion of the assembly limit post 7. The screw feed cylinder 5 has a front-to-back injection heater 6 fitted on the limiting ring groove, which facilitates the heating of the material. The top of the rear end face of the injection heater 6 is provided with a horizontal plate with through-holes at the top and bottom, which facilitates the installation of the assembly limit post 7 by thread. The horizontal plate of the injection heater 6 has an assembly limit post 7 installed in the upper and lower directions by thread, which facilitates the limiting and stopping of the injection heater 6. The outer circumference of the assembly limit post 7 is threaded, which facilitates the installation by thread. The top end face of the assembly limit post 7 is provided with a regular hexagonal groove, which facilitates the rotation and disassembly by tools.

[0030] The specific usage and function of this embodiment are as follows:

[0031] In this utility model, such as Figure 1 As shown, the rear end of the spiral feed cylinder 5 is threaded onto an external component, with the rear end of the external component in a cut-off state. A spiral feed rod is installed inside the spiral feed cylinder 5, with its rear end also cut off. The rear end of the spiral feed rod is connected to an external power unit, allowing the spiral feed rod to rotate. When the injection sprue sleeve 3 is disassembled, a tool is used to rotate the injection sprue sleeve 3 to engage with the threaded connection of the injection mold plate 2, causing the injection sprue sleeve 3 to move backward and disengage from the injection mold plate 2. When the injection heater 6 is disassembled, a tool is used to rotate the assembly limiting post 7 to engage with the threaded connection of the injection heater 6, causing the assembly limiting post 7 to rise and disengage from the insertion blind hole of the spiral feed cylinder 5. This releases the assembly limiting post 7 from stopping the injection heater 6, allowing the injection heater 6 to move forward and disengage from the spiral feed cylinder 5.

[0032] Example 2:

[0033] The difference from Embodiment 1 is that the regular hexagonal prism of the injection gate sleeve 3 can also be set as a regular heptagonal prism, which makes the injection gate sleeve 3 require a special tool that works with the regular heptagonal prism to rotate, thus preventing non-staff members from rotating and disassembling the injection gate sleeve 3.

[0034] Example 3:

[0035] The difference from Embodiment 1 is that the regular hexagonal groove of the assembly limiting post 7 can also be set as a regular heptagonal groove, so that the assembly limiting post 7 can only be rotated by a special tool that cooperates with the regular heptagonal groove, thus preventing non-workers from rotating and disassembling the assembly limiting post 7.

Claims

1. A spiral-feed injection mold, characterized in that: The mold body (1) includes an injection mold plate (2), which has a threaded hole that runs through the front and back at the center. An injection sprue sleeve (3) is installed inside the threaded hole of the injection mold plate (2) by thread. A threaded post is provided in front of the injection sprue sleeve (3). A limiting ring plate is provided on the outer circumference of the rear end of the threaded post of the injection sprue sleeve (3). A regular hexagonal prism is provided on the rear end face of the threaded post of the injection sprue sleeve (3). A frustum groove is provided on the rear end face of the regular hexagonal prism of the injection sprue sleeve (3). A frustum hole that runs through the front and back is provided on the front end face of the threaded post of the injection sprue sleeve (3).

2. The injection mold with spiral feeding as described in claim 1, characterized in that: The injection gate sleeve (3) has an injection nozzle (4) inserted inside the frustum groove. A threaded post is provided behind the injection nozzle (4), and a regular hexagonal ring plate is provided on the outer circumference of the front end of the threaded post of the injection nozzle (4).

3. The injection mold with spiral feeding as described in claim 2, characterized in that: The front end face of the threaded column of the injection nozzle (4) is provided with a frustum, the rear end face of the threaded column of the injection nozzle (4) is provided with a frustum groove, and the front end face of the frustum of the injection nozzle (4) is provided with a through hole that runs from front to back.

4. The injection mold with spiral feeding as described in claim 3, characterized in that: The injection nozzle (4) has a spiral feed cylinder (5) threadedly installed on its threaded post. The spiral feed cylinder (5) has a threaded annular groove on its inner circumference at the front end and a limiting annular groove on its outer circumference at the front end.

5. The injection mold with spiral feeding as described in claim 4, characterized in that: The outer circumference of the rear end of the spiral feed cylinder (5) is provided with a thread, and a regular hexagonal ring plate is provided on the outer circumference of the rear end of the spiral feed cylinder (5). A threaded hole that runs through the top and bottom is provided on the front top wall of the regular hexagonal ring plate of the spiral feed cylinder (5). An insertion blind hole is provided on the top of the outer circumference in front of the threaded hole of the spiral feed cylinder (5).

6. The injection mold with spiral feeding as described in claim 5, characterized in that: The limiting ring groove of the spiral feed cylinder (5) is fitted with an injection heater (6), and the top of the rear end face of the injection heater (6) is provided with a horizontal plate with upper and lower through threaded holes.

7. The injection mold with spiral feeding as described in claim 6, characterized in that: The horizontal plate of the injection heater (6) is fitted with an assembly limiting post (7) by threads. The assembly limiting post (7) has threads on its outer circumference and a regular hexagonal groove on its top end face.

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