LSR cold runner system easy to disassemble and assemble

Abstract

The utility model provides an easily disassembled and assembled LSR cold runner system, which relates to the technical field of injection molds, and comprises a sprue bush, a runner adapter block, a cylinder insert, a cushion block and a lining insert which are arranged from top to bottom, the runner adapter block and the cylinder insert are provided with glue inlet channels, the upper end face of the cushion block is provided with a glue inlet, a cylinder insert mounting cylinder and a cylinder mounting valve needle, a spring piece is installed at the upper end of the nozzle core, one end of the spring piece abuts against the nozzle core, the other end of the spring piece abuts against the bottom of the cushion block, and the valve needle movably penetrates through the air cylinder insert and the cushion block to reach the nozzle core. During injection molding, liquid silica gel enters from the sprue bush and enters the nozzle core through the gel inlet channel, the air cylinder is controlled to drive the valve needle to move up and down, so that the liquid silica gel flows out of the lower end of the nozzle core to a forming cavity, and the elastic yellow sheet relieves impact force through pre-compression when the head of the nozzle core is in hard collision with the mold core, so that the risk that an opening of the mold core is damaged by collision is avoided, and product flash is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an LSR cold runner system that is easily disassembled and assembled. Background Art

[0002] Injection molding is a method for producing industrial products. Silicone injection molding uses liquid silicone to be injected into a mold cavity formed by a mold core and then hardened by heating to form the product. The thermal expansion and contraction of the mold at high temperatures can cause the nozzle head of the injection molding core to collide with the mold core when the mold is closed, resulting in flash defects after molding. Utility Model Content

[0003] The utility model provides an LSR cold runner system that is easy to assemble and disassemble, aiming to improve the problem that the nozzle core of the existing cold runner collides with the mold core during mold closing, resulting in flash defects in the product.

[0004] The utility model is implemented as follows: an LSR cold runner system that is easy to disassemble and assemble, including a gate sleeve, a runner adapter block, a cylinder insert, a pad and a bushing insert arranged from top to bottom, the runner adapter block and the cylinder insert are provided with a glue inlet channel, the upper end surface of the pad is provided with a glue inlet, the cylinder insert is installed with a cylinder, the cylinder is installed with a valve needle, the bushing insert is provided with a nozzle core, the upper end of the nozzle core is installed with a spring sheet, one end of the spring sheet abuts against the nozzle core and the other end abuts against the bottom of the pad, and the valve needle is movable through the cylinder insert and the pad to the nozzle core.

[0005] Furthermore, the nozzle core is further sleeved with a nozzle sleeve, and a water flow cavity is formed between the nozzle sleeve and the nozzle core. A water inlet pipe is provided on the side of the bushing insert, and the water inlet pipe is connected to the water flow cavity.

[0006] Furthermore, a nozzle head is further installed at the lower end of the nozzle core, and the nozzle head is connected to the nozzle sleeve through a thread.

[0007] Furthermore, sealing rings are installed between the nozzle core and the bushing, and between the nozzle core and the nozzle head.

[0008] Furthermore, a sealing ring is installed between the nozzle core and the pad and bushing insert.

[0009] Furthermore, the flow channel adapter block, cylinder insert, cushion block and bushing insert are connected together by bolts.

[0010] The beneficial effects of the utility model are:

[0011] The utility model discloses an easily disassembled LSR cold runner system comprising a sprue sleeve, a runner adapter block, a cylinder insert, a spacer block, and a bushing insert arranged from top to bottom. The runner adapter block and the cylinder insert are provided with a glue inlet channel, the upper end surface of the spacer block is provided with a glue inlet port, the cylinder insert is provided with a cylinder, the cylinder is provided with a valve needle, the bushing insert is provided with a nozzle core, the upper end of the nozzle core is provided with a spring plate, one end of the spring plate abuts against the nozzle core and the other end abuts against the bottom of the spacer block, and the valve needle is movable through the cylinder insert and the spacer block to the nozzle core. During injection molding, liquid silicone enters the sprue sleeve through the glue inlet channel, and then from the glue inlet into the nozzle core. The control cylinder drives the valve needle to move up and down to cause the liquid silicone to flow out of the lower end of the nozzle core into the molding cavity. The spring plate is pre-compressed to reduce the impact force when the nozzle core head collides with the mold core, thereby eliminating the risk of damage to the mold core mouth and avoiding product flash. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0013] Figure 1 This is a general schematic diagram of the easily disassembled LSR cold runner system described in the present invention;

[0014] Figure 2 This is a cross-sectional view of the easily disassembled LSR cold runner system described in the present invention;

[0015] Figure 3 It is a partial cross-sectional view of the easily disassembled LSR cold runner system described in the present invention.

[0016] Reference numerals:

[0017] 10. Sprue bushing;

[0018] 20. Runner adapter block;

[0019] 30, cylinder insert; 301, cylinder; 3011, valve needle;

[0020] 40. Pads;

[0021] 50. Bushing insert; 501. Nozzle core; 502. Nozzle sleeve; 503. Nozzle head; 504. Spring sheet; 505. Water inlet pipe; 506. Sealing ring. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0024] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0025] Please refer to Figure 1-3 As shown, this embodiment provides an LSR cold runner system that is easy to disassemble and assemble, including a gate sleeve 10, a runner adapter block 20, a cylinder insert 30, a pad 40 and a bushing insert 50 arranged from top to bottom, wherein the runner adapter block 20, the cylinder insert 30, the pad 40 and the bushing insert 50 are connected by bolts to facilitate the installation of the mold.

[0026] Please refer to Figure 1-3As shown, the flow channel adapter block 20 and the cylinder insert 30 are provided with a glue inlet channel, the upper end surface of the gasket 40 is provided with a glue inlet, the cylinder insert 30 is installed with a cylinder 301, the cylinder 301 is installed with a valve needle 3011, the bushing insert 50 is provided with a nozzle core 501, and a spring sheet 504 is installed on the upper end of the nozzle core 501. One end of the spring sheet 504 abuts against the nozzle core 501 and the other end abuts against the bottom of the gasket 40. The valve needle 3011 can move through the cylinder insert 30 and the gasket 40 to the nozzle core 501. Specifically, liquid silicone enters through the sprue bushing 10, flows through the runner adapter block 20's inlet channel to the cylinder insert 30, and finally enters the nozzle 501 through the inlet port of the spacer block 40. It then passes through the nozzle 501 to the mold cavity, where it is heated to form the product. Due to thermal expansion and contraction, the tip of the nozzle 501 can collide with the mold core during mold closing. Therefore, the spring is pre-compressed to mitigate the impact of this collision, thereby reducing the risk of damage to the mold core and preventing product flash. Furthermore, a sealing ring 506 is installed between the nozzle 501, the spacer block 40, and the bushing insert 50 to prevent liquid silicone from escaping from the gap between the nozzle 501, the spacer block 40, and the bushing insert 50.

[0027] Please refer to Figure 1-3 As shown, the nozzle core 501 is further sheathed with a nozzle sleeve 502, forming a water passage cavity between the nozzle sleeve 502 and the nozzle core 501. A water inlet pipe 505 is provided on the side of the bushing insert 50, connecting to the water passage cavity. Specifically, water is injected into the water inlet pipe 505 during injection of the liquid silicone. The cooling water in the cavity between the nozzle sleeve 502 and the nozzle core 501 reduces the temperature of the nozzle core 501, ensuring good fluidity of the liquid silicone.

[0028] Please refer to Figure 1-3 As shown, the lower end of the nozzle core 501 is further mounted with a nozzle head 503, which is threadedly connected to the nozzle sleeve 502. Specifically, after the injection molding is completed, the nozzle core 501 needs to be cleaned, and the threaded connection can be quickly disassembled for cleaning, which is convenient for disassembly and cleaning by the operator.

[0029] Furthermore, sealing rings 506 are installed between the nozzle core 501 and the bushing, and between the nozzle core 501 and the nozzle head 503 to prevent liquid silicone or cooling water from overflowing and causing the product to be scrapped.

[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An easily disassembled LSR cold runner system, characterized by: It includes a gate sleeve, a runner adapter block, a cylinder insert, a pad and a bushing insert arranged from top to bottom, the runner adapter block and the cylinder insert are provided with a glue inlet channel, the upper end face of the pad is provided with a glue inlet, the cylinder insert is installed with a cylinder, the cylinder is installed with a valve needle, the bushing insert is provided with a nozzle core, the upper end of the nozzle core is installed with a spring sheet, one end of the spring sheet abuts against the nozzle core and the other end abuts against the bottom of the pad, and the valve needle is movable through the cylinder insert and the pad to the nozzle core.

2. The easily disassembled LSR cold runner system according to claim 1, characterized in that: The nozzle core is further sleeved with a nozzle sleeve, and a water flow cavity is formed between the nozzle sleeve and the nozzle core. A water inlet pipe is arranged on the side of the bushing insert, and the water inlet pipe is connected to the water flow cavity.

3. The easily disassembled LSR cold runner system according to claim 1, characterized in that: A nozzle head is further installed at the lower end of the nozzle core, and the nozzle head is connected to the nozzle sleeve through a thread.

4. The easily disassembled LSR cold runner system according to claim 3, characterized in that: Sealing rings are installed between the nozzle core and the bushing, and between the nozzle core and the nozzle head.

5. The easily disassembled LSR cold runner system according to claim 1, characterized in that: A sealing ring is installed between the nozzle core and the pad and bushing insert.

6. The easily disassembled LSR cold runner system according to claim 1, characterized in that: The flow channel adapter block, the cylinder insert, the cushion block and the bushing insert are connected together by bolts.

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