A nut burying detection mechanism for use in a mold

Abstract

This invention relates to the field of injection mold technology, and in particular to a nut embedding detection mechanism for use in molds. The mechanism includes: a suction inlet installed in the male mold core, comprising a base and a nut embedding end; the base having a first suction hole; the nut embedding end having a second suction hole at a corresponding position to the first suction hole, and a third suction hole tangentially arranged around its outer periphery; a nut fixing post that can be inserted into the second suction hole, one end of which is a contracted end protruding from the surface of the nut embedding end, its diameter adapted to the inner diameter of the nut; the outer tangent diameter of the third suction hole being less than or equal to the outer diameter of the nut; the first and third suction holes forming a negative pressure channel; and a negative pressure source and a negative pressure gauge connected to the negative pressure channel. The advantages of this invention are that it can effectively fix the nut, detect whether the nut is loose or has fallen off, reduce product defect rate, prevent mold damage, and facilitate mold repair.

Description

[Technical Field]

[0001] This invention relates to the field of injection mold technology, and in particular to a nut embedding detection mechanism for use in molds. [Background Technology]

[0002] When injection molding products, nuts sometimes need to be embedded inside the product. In this case, the nuts need to be embedded in the mold cavity in advance. This work is usually done by a robot. The robot places the nuts in the corresponding positions in the mold according to the program settings. Then, the operator uses a monitor to determine whether the nuts are placed in place. However, when embedding small nuts, sometimes the nuts are not placed correctly. However, such subtle positional errors are difficult to detect in the monitor. Or, after the nuts are placed, when the mold is closed, the nut may loosen or fall off due to mold vibration, resulting in defective products. Even worse, the fallen nuts may damage the mold.

[0003] In view of this, it is necessary to develop a nut embedding detection mechanism for use in molds to solve the above problems. [Summary of the Invention]

[0004] The technical problem this invention aims to solve is: when embedding small-sized nuts in a mold, the small size of the nuts can cause misalignment, making it difficult to detect with conventional monitoring devices; or the nuts may be placed correctly but fall off during mold closing vibrations, resulting in defective products and mold damage. This invention provides a nut embedding detection mechanism for use in molds to solve these problems.

[0005] The solution to the technical problem of this invention is: a nut embedding detection mechanism for use in a mold, comprising:

[0006] The suction insert is installed in the male mold core and is set at the corresponding position where the nut needs to be embedded in the product. It includes a base and a nut embedding end. The base has a first suction through hole.

[0007] One end of the nut embedding end can be tightly installed on the air intake base. The nut embedding end has a second air intake hole through it at the corresponding position of the first air intake hole. A third air intake hole is tangentially provided on the outer periphery of the second air intake hole. The other end of the nut embedding end away from the base is used to place the nut to be embedded.

[0008] The nut fixing post is inserted into the second air intake hole. One end of the nut fixing post is a condensed end that protrudes from the surface of the nut embedded end. Its diameter is set to match the inner diameter of the nut. The outer tangent circle diameter of the third air intake hole is set to be less than or equal to the outer diameter of the nut. The first air intake hole and the third air intake hole form a negative pressure channel to attract the nut and help fix it, preventing the nut from falling off or loosening during mold vibration.

[0009] The nut embedding detection mechanism also includes a negative pressure source and a negative pressure gauge connected to the negative pressure channel.

[0010] Preferably, the bottom of the nut embedding end is further provided with a boss, and the boss has an installation hole for detachably installing the nut embedding end into the mold.

[0011] Preferably, the other end of the nut fixing post is provided with an end cap. The end of the nut fixing post with the end cap is fixed between the base of the air intake and the nut embedding end. The size of the end cap is larger than the size of the second air intake through hole and smaller than the outer tangent circle size of the third air intake through hole to prevent the nut fixing post from detaching from the nut embedding end. A gap is left between the end cap and the first air intake through hole to prevent blockage of the negative pressure channel.

[0012] The beneficial effects of this invention are that when embedding small-sized nuts, the nuts can be effectively attracted and fixed, and it can also effectively detect whether the nuts are loose or fall off, reducing the product defect rate, effectively preventing mold damage, and making mold repair convenient. [Attached Image Description]

[0013] Figure 1 This is a schematic diagram of the nut embedding detection mechanism for molds according to the present invention at the position of the male mold core.

[0014] Figure 2 This is a schematic diagram of a nut embedding and detection mechanism for use in a mold according to the present invention.

[0015] Figure 3 This is an exploded view of a nut embedding detection mechanism for a mold according to the present invention.

Detailed Implementation Methods

[0016] To further illustrate the technical means and effects of the present invention, the following detailed description is provided in conjunction with the embodiments of the present invention and their accompanying drawings.

[0017] This invention provides a nut embedding detection mechanism for use in a mold, comprising:

[0018] The suction inlet 2 is installed in the male mold core 1 and is set at the corresponding position where the nut needs to be embedded in the product. It includes a base 20 and a nut embedding end 21. The base 20 has a first suction through hole 200.

[0019] One end of the nut embedding end 21 can be tightly installed on the air intake base 20, and the other end is used to place the nut to be embedded. The nut embedding end 21 has a second air intake hole 210 through it at the corresponding position of the first air intake hole 200. A third air intake hole 211 is tangentially provided on the outer periphery of the second air intake hole 210. The bottom of the nut embedding end 21 is also provided with a boss, and the boss has a mounting hole 212 for detachably installing the nut embedding end 21 in the mold. When the nut embedding end 21 needs to be cleaned after the glue is injected, it is not necessary to disassemble the mold and remove the entire air intake 2. Only the nut embedding end 21 of the air intake 2 needs to be removed for cleaning, which is convenient for mold repair.

[0020] The nut fixing post 3 is inserted into the second suction hole 210. One end of the nut fixing post 3 is a shrinkage end 30, which protrudes from the surface of the nut embedding end 21. Its diameter is set to match the inner diameter of the nut. The nut can be inserted into the shrinkage end 30. The outer tangent diameter of the third suction hole 211 is less than or equal to the outer diameter of the nut. The first suction hole 200 and the third suction hole 211 form a negative pressure channel to adsorb the nut and help fix the nut, preventing the nut from falling off or loosening during mold vibration.

[0021] The other end of the nut fixing post 3 is provided with an end cap 31. The end of the nut fixing post 3 with the end cap 31 is fixed between the base 20 of the air intake 2 and the nut embedding end 21. The size of the end cap 31 is larger than the size of the second air intake through hole 210 and smaller than the outer tangent circle size of the third air intake through hole 211, so as to prevent the nut fixing post 3 from detaching from the nut embedding end 21. A gap is left between the end cap 31 and the first air intake through hole 200 to prevent the negative pressure channel from being blocked.

[0022] The nut embedding detection mechanism also includes a negative pressure source (not shown in the figure) and a negative pressure gauge (not shown in the figure). The suction inlet is connected to the negative pressure source (not shown in the figure) and the negative pressure gauge (not shown in the figure). The signal line of the negative pressure gauge (not shown in the figure) is connected to the mold closing signal circuit. When the reading of the negative pressure gauge (not shown in the figure) is lower than the preset value, the mold closing signal circuit cannot be turned on, and the mold cannot be closed, so as to prevent the generation of defective products and damage to the mold when the nut falls on the mold during mold closing.

[0023] The working principle of this invention is as follows: First, the nut is placed in place, and the negative pressure source (not shown in the figure) is turned on. The third suction hole 211 and the first suction hole 200 form a negative pressure channel. At this time, the negative pressure gauge (not shown in the figure) will display a reading. This reading is set as the standard value. After the robot arm places the nut, the negative pressure gauge (not shown in the figure) detects the negative pressure value at this time. If the negative pressure value is lower than the set standard value, it means that the nut is not placed in place or has fallen off. The mold closing circuit cannot be connected, and the mold cannot be closed. After checking and correcting the position of the nut, the negative pressure is detected again. If the negative pressure value is equal to or greater than the set standard value, the mold closing circuit is connected, the mold is closed, and the injection molding of the product begins.

[0024] In summary, the beneficial effects of the present invention are that the nut embedding detection mechanism of the present invention can effectively fix the nut and effectively detect whether the nut exists and whether it is placed in place, thereby effectively reducing the product defect rate and protecting the mold. Moreover, the air intake 2 is a split type, which can simplify the mold repair procedure and save production time.

[0025] It should be noted that the present invention is not limited to the above embodiments. Any simple modifications, equivalent changes and alterations made by those skilled in the art to the above embodiments based on the technical solutions of the present invention shall fall within the protection scope of the present invention.

Claims

1. A nut embedding detection mechanism for use in a mold, characterized in that, include: The suction insert is installed in the male mold core and is set at the corresponding position where the nut needs to be embedded in the product. It includes a base and a nut embedding end. The base has a first suction through hole. One end of the nut embedding end can be tightly installed on the base. The nut embedding end has a second air intake hole through it at the corresponding position of the first air intake hole. A third air intake hole is tangentially provided on the outer periphery of the second air intake hole. The bottom of the nut embedding end is also provided with a boss. The boss has a mounting hole for detachably installing the nut embedding end into the mold. A nut fixing post is inserted into the second air intake hole. One end of the nut fixing post is a contracted end that protrudes from the surface of the nut embedding end. Its diameter is set to match the inner diameter of the nut. The outer tangent diameter of the third air intake hole is less than or equal to the outer diameter of the nut. The first air intake hole and the third air intake hole form a negative pressure channel. The other end of the nut fixing post is provided with an end cap. The end of the nut fixing post with the end cap is placed between the base of the air intake and the nut embedding end. The size of the end cap is larger than the size of the second air intake hole and smaller than the outer tangent diameter of the third air intake hole to prevent the nut fixing post from detaching from the nut embedding end. A gap is left between the end cap and the first air intake hole to prevent blockage of the negative pressure channel. It also includes a negative pressure source and a negative pressure gauge connected to the negative pressure channel.

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